CN100538858C - Tray salver - Google Patents

Abstract

A kind of tray salver is provided, possess: the tray salver main body, it comprises: have disk peristome and bottom, and may state make first of disk can be located at the chucking peristome bottom the disk storage portion with exposing outside to the disk storage portion of harvesting, in order to tighten disk from the outside and the magnetic head that disk second face carries out at least one side of signal regeneration and signal record is used to choose and be located at the magnetic head peristome of the bottom of disk storage portion from the disk peristome in the disk rotation with first and second; Shutter, it supports movably with respect to the tray salver main body between second of disk and disk storage portion bottom, so that opening or close chucking peristome and magnetic head peristome; Shutter have shutter be in the center pit that protrudes from disk when closing, be located at the projection on the shutter because the opening or the closing motion of shutter, projection contact on one side is at the second surface of disk, on one side disk is lifted to the tray salver thickness direction.

Description

Disk case

This application is a divisional application of an application whose application number is 02803149.0, the application date is January 10, 2002, and the invention name is disc box.

technical field

The present invention relates to a disc cartridge in which a disc-shaped signal recording medium such as an optical disc or a magnetic disc is loaded and the disc is rotatable.

Background technique

Conventionally, there has been a proposal of a disc cartridge for fixing a disc-shaped signal recording medium.

For example, Japanese Patent Application Laid-Open No. 9-153264 discloses that a disk-shaped recording medium (hereinafter referred to as a magnetic disk) having a single-sided or double-sided signal recording medium is completely covered and mounted on a disk cartridge body composed of an upper half and a lower half. Disk case in the disk storage part installed inside. On the main body of the disc cartridge, there are a turntable of the spindle motor, a clamping opening for the terminal block to clamp the magnetic disc, and a magnetic head opening for the magnetic head to regenerate and record signals from the magnetic disc. The chuck opening is connected to the head opening, and when the disk cartridge is carried and transported, dust or fingerprints are likely to enter through these openings and adhere to the magnetic disk. Therefore, the disk case has a shutter that covers these openings.

But, the disk box of this structure, in order to insert the disk box in the magnetic disk device and carry out the recording and reproducing of the magnetic disk, it is necessary to form in the space of loading the magnetic disk formed between the upper half and the lower half: ensure that when the magnetic disk rotates surface contact, accommodate the curvature of the disk, and allow room for positioning errors of the disk cartridge in the disk unit. Therefore, there is a problem that the thickness of the disc cartridge body becomes thick.

In addition, the opening for the turntable of the spindle motor and the opening for the magnetic head are provided in the lower half, and the opening for the terminal block is provided in the upper half. Therefore, the shutter that closes these at the same time needs to have a bridge connecting the upper half and the shutter. The U-shape of the lower half. However, since the shutter having such a shape is expensive, it causes an increase in the manufacturing cost of the disc cartridge.

In addition, when there is a magnetic disk with a metal jack, it can be attracted without looseness by using magnetic force, but when there is no optical disc such as CD or DVD, the optical disc is generally not fixed in the disc case and is in a free state. Therefore, there is a problem that the shutter is opened in the magnetic disk drive, and dust enters through the opening and adheres to the optical disk. In addition, there is a problem that dust is generated due to loosening of the optical disc, damage to the signal recording surface of the disc, or collision between the disc and the inner wall of the disc case, and the dust adheres to the disc.

Contents of the invention

The purpose of the present invention is to solve the above problems, especially to reduce the thickness and reduce the cost of the disc case by reducing its thickness and simplifying the shutter structure when installed in a disc case with a single recording surface. In addition, it eliminates looseness inside the cartridge when supporting the magnetic disk, reduces dust adhering to the magnetic disk, and utilizes the exposed electric plane of the magnetic disk to provide a cartridge with superior design.

The disc case of the present invention comprises: a disc case main body and a shutter; it is characterized in that, the disc case main body comprises: a disc opening and a bottom, and the disc has a first face and a second face in a state where the disc can rotate The first surface of the disk storage part can be stored outside the disk opening, the locking opening provided at the bottom of the disk storage part in order to clamp the disk from the outside, and the The magnetic head of at least one of the two actions of signal regeneration or signal recording on the second surface of the magnetic disk is used to select and is arranged at the magnetic head opening at the bottom of the magnetic disk storage part; the shutter is on the second surface of the magnetic disk Between the bottom of the disk storage part, it is movably supported relative to the disk box main body, so as to open or close the clamping opening and the magnetic head opening; the shutter has a The protrusion protruding from the central hole of the magnetic disk when closed is provided on the shutter. Due to the opening or closing action of the shutter, the protrusion contacts the second surface of the magnetic disk while turning The magnetic disk is lifted toward the thickness of the cartridge.

In a certain embodiment, the disk storage part includes a first inner surface that becomes the bottom of the disk storage part, a second inner surface that is approximately cylindrical and surrounds the outer circumference of the disk when the disk is installed, and The disk opening part of the disk is inserted and taken out, the disk storage part is installed with the disk, and one surface of the disk is exposed from the disk opening.

In a certain embodiment, the shutter of the disk cartridge has a disk holding part, which is linked with the shutter, and when the shutter closes the clamping opening and the head opening, the disk is Hold on to the shutter.

In a certain embodiment, the disk holding member is provided on a part of the shutter.

In a certain embodiment, the disk cartridge is provided with a plurality of the disk holding members arranged at the shutter so as to fix the vicinity of the outer periphery of the disk.

In a certain embodiment, the disk holding member makes the disk surface contact the shutter.

In a certain embodiment, the disk holding member has an inverted tapered slope, and the disk is held by making the slope contact the side or corner of the disk, and the disk surface is in contact with the side of the shutter. The method holds the disk on the cartridge body.

In a certain embodiment, the disc case further has: a locking mechanism for fixing and supporting the shutter on the main body of the disc case at the position where the shutter closes the clamping opening and the magnetic head opening . In order not to interfere with the operation of the shutter, it is preferable to cut off a part of the second inner surface.

In one embodiment, the disk cartridge body of the disk cartridge has a shutter storage portion for storing a part of the shutter when the shutter opens the clamping opening and the magnetic head opening.

In one embodiment, the disk cartridge further includes a plurality of drop-off prevention members protruding toward the disk opening to prevent the disk from falling out of the disk opening. The plurality of fall-off prevention members may move in the thickness direction of the disc case in conjunction with the opening and closing of the shutter.

In a certain embodiment, the disc cartridge has a plurality of shutters, and it is also possible for the plurality of shutters to cooperate to open the clamping opening and the magnetic head opening to the outside.

In a certain embodiment, one of the plurality of shutters is provided with a state in which the plurality of shutters close the clamping opening and the magnetic head opening to fix the plurality of shutters. Support the locking mechanism on the cartridge body.

In a certain embodiment, the plurality of shutters are respectively partially overlapped in the thickness direction of the shutters to close the clamping opening and the magnetic head opening.

In a certain embodiment, the disk cartridge has a mechanism for preventing wrong insertion of the disk cartridge.

In one embodiment, the magnetic head opening reaches the cartridge main body.

In a certain embodiment, the plurality of shutters respectively rotate around a plurality of rotation axes provided on the main body of the disc cartridge. Preferably, the plurality of rotation shafts are provided in an area other than the disk storage portion of the disk cartridge body. In addition, the magnetic head opening reaches a side surface of the cartridge main body, is adjacent to the side surface facing the side surface, and is provided with the plurality of rotation shafts.

In a certain embodiment, each of the plurality of shutters has an interlocking member that is interlocked to be closed. The interlocking member may be a cam-shaped or gear-shaped portion respectively provided on the plurality of shutters. The linkage component can also be a belt or a connecting rod.

In one embodiment, the disc cartridge has an elastic member biased to maintain the open or closed state of the plurality of shutters. Preferably, the elastic member is provided in an area other than the disk storage portion of the cartridge body. The elastic member may also be integrally formed with the shutter.

In a certain embodiment, the plurality of fall-off preventing members are detachable, and may also be integrally formed with the main body of the disc cartridge.

In a certain embodiment, the plurality of fall-off prevention components are detachably installed on the main body of the disk cartridge.

In a certain embodiment, the disk case is provided with a protective layer to prevent the disk from being damaged on the area in contact with the second surface of the shutter. The protective layer is preferably one selected from a nonwoven fabric for preventing damage, a nonwoven fabric for preventing dust, a coating for preventing damage, and a coating for preventing dust.

In a certain embodiment, when the surface of the disk is in contact with the shutter, dirt on the disk is removed by rotating the disk. Or the opening and closing action of the shutter opening or closing the clamping opening and the magnetic head opening to remove the dirt on the magnetic disk.

In a certain embodiment, the wrong insertion prevention mechanism includes a protrusion or a recess provided on the outer surface of the main body of the disc cartridge, which is asymmetrical to the direction in which the disc cartridge is inserted into the external device.

In a certain embodiment, the locking mechanism includes a locking hole formed in the main body of the disk cartridge and a device for engaging the locking hole at a position where the shutter closes the locking opening and the magnetic head opening. Locking tabs on the shutter.

In a certain embodiment, the locking protrusion is mounted on the shutter through an elastic component, and the locking protrusion is forced to fit into the locking hole by using the elastic component.

In a certain embodiment, the locking mechanism includes: a locking hole formed in the main body of the disk case, and the shutter is fitted with the locking hole at a position where the clamping opening and the magnetic head opening are closed. The locking protrusion and the locking lever provided on the main body of the disc case, the first protrusion or the first recess formed on the locking lever, and the first protrusion or the first recess are fitted in the closed position A second concave portion or a second raised portion formed on the shutter.

The locking lever is installed on the main body of the disk case through an elastic member, and the locking protrusion is force-fitted into the locking hole by means of the elastic member. In addition, the first protrusion or the first recess It is also possible to force fit the second recess or the second protrusion. In addition, the locking protrusion and the elastic member may also be integrally formed with the shutter. The lock lever and the elastic member may also be integrally formed with the cartridge main body.

In a certain embodiment, the shutter has: when the shutter is in the state of closing the clamping opening and the head opening while the shutter is in contact with the surface of the magnetic disk, it faces toward the center of the magnetic disk. The raised portion protruding from the hole; the raised portion contacts the lower surface of the magnetic disk due to the opening and closing action of the shutter, and lifts the magnetic disk to the thickness direction of the disk case, releasing the connection between the magnetic disk and the magnetic disk. Surface contact of the shutter described above.

In a certain embodiment, the disc cartridge has a plurality of shutters, and each of the plurality of shutters has: the plurality of shutters are in surface contact with the magnetic disc while closing the chucking opening and the When the magnetic head opening is in the state, it is a raised portion that protrudes toward the central hole of the magnetic disk; during the opening and closing action of the shutter, the raised portion contacts the lower surface of the magnetic disk while turning the The magnetic disk is lifted toward the thickness direction of the cartridge, releasing the surface contact between the magnetic disk and the shutter.

The protruding portion may be selected from a spherical shape, a conical shape, a ring shape or a plurality of spherical shapes.

In a certain embodiment, the falling-off preventing member is integrally formed with the shutter. The falling-off preventing member may be integrally formed with the shutter through a bending member or an elastic member. The falling-off preventing part has a protrusion or a concave part, and the disc box main body has a guide concave part or a guiding convex part matched with the protrusion or concave part of the falling-off preventing part on the inner side wall of the disc case main body. It is also possible for the preventing member to move in the thickness direction of the disc case in conjunction with the opening and closing of the shutter.

In a certain embodiment, the falling-off preventing member is integrally formed with the cartridge main body. It is also possible that the falling-off preventing member is integrally formed with the main body of the disc cartridge through an elastic member. The falling-off preventing member may be an elastic body that divides a part of the cartridge main body with a small gap. The falling-off preventing member has a first protrusion or a first slope, and the shutter has a second slope or a second protrusion, and the first protrusion or the first slope is connected to the second slope. Or it is also possible that the second protrusions engage with each other.

In addition, when the shutter opens the clamping opening and the magnetic head opening, the first protrusion or the first inclined portion engages with the second inclined portion or the second protrusion. .

It is also possible to provide a concave part that cooperates with the second protrusion or the first protrusion near the first inclined part or the second inclined part.

In a certain embodiment, when the shutter closes the chucking opening and the magnetic head opening, the magnetic disk is pressed in the thickness direction, so that the magnetic disk surface is in contact with the magnetic disk. Describe the shutter. This holds the magnetic disk on the cartridge main body.

In a certain embodiment, two different places among the plurality of shutters are respectively provided with: an opening and closing lever for opening and closing the shutter and the plurality of shutters, and when closing the clamping opening and the magnetic head At the position of the opening, the shutter is fixedly supported by the locking mechanism of the disc cartridge body.

Other disk cartridges of the present invention include: a disk cartridge main body, a shutter, and a disk holding member; wherein the disk cartridge main body includes: a state in which a disk having a first surface and a second surface can be rotated and the first surface of the disk is The magnetic disk storage part that can be stored exposed to the outside is provided at the bottom of the magnetic disk storage part and includes a clamping opening for clamping the magnetic disk from the outside, and performs signal reproduction and signal recording on the second surface of the magnetic disk At least one magnetic head is used to select the magnetic head opening; in order to open or close the clamping opening and the magnetic head opening, the shutter is located between the second surface of the magnetic disk and the bottom of the magnetic disk storage part. Between, it is movably supported relative to the main body of the disc cartridge, and in the closed state, a hole is provided corresponding to the center hole area of the disc; the disc holding part is arranged on the shutter, and the card is closed when the shutter When closing the opening and the head opening, the magnetic disk is held by pressing the shutter against the shutter.

Other disk cartridges of the present invention include: a disk cartridge main body, a shutter, a disk holding member, and a flange; The disk storage part whose surface can be exposed to the outside is provided at the bottom of the disk storage part and includes a clamping opening for clamping the disk from the outside and performing signal regeneration and signal processing on the second surface of the disk. At least one magnetic head for recording is used to select the magnetic head opening; the shutter is in order to open or close the clamping opening and the magnetic head opening, on the second surface of the magnetic disk and the magnetic disk storage part Between the bottoms, it is movably supported relative to the main body of the disk cartridge; the disk holding member is provided on the shutter, and when the shutter closes the clamping opening and the head opening, the disk is press the shutter to hold the disk; the flange protrudes from the inner side of the disk storage part toward the center of the disk, and contacts the outer edge of the disk when the shutter is in a closed state .

Description of drawings

Fig. 1 is a perspective view showing the overall structure of a disk cartridge according to Embodiment 1 of the present invention.

Fig. 2 is a perspective view of the disc cartridge of Fig. 1 viewed from below.

Fig. 3 is a disassembled isometric view showing a disassembled state of the disc cartridge of Fig. 1;

Fig. 4 is a sectional view showing the vicinity of a disk holding member of the disk cartridge of Fig. 1 .

Fig. 5 is a sectional view showing the vicinity of a disk holding member of the disk cartridge of Fig. 1 .

Fig. 6 is a perspective view showing a state in which a shutter is opened and positioning pins are inserted in the disk cartridge of Fig. 1;

Fig. 7 is a cross-sectional view showing the vicinity of the disk holding member in Fig. 6 .

Fig. 8 is a perspective view showing the vicinity of the disk holding member in Fig. 6 .

Fig. 9 is a plan view showing the overall structure of the disk cartridge according to Embodiment 2 of the present invention.

Fig. 10 is a plan view showing a state in which a magnetic disk is opened in the disk cartridge of Fig. 9 .

Fig. 11 is a plan view showing the overall structure of the disc cartridge according to Embodiment 3 of the present invention.

Fig. 12 is a plan view showing a state in which a magnetic disk is opened in the disk cartridge of Fig. 11;

Fig. 13 is a plan view showing the overall structure of the disc cartridge according to Embodiment 4 of the present invention.

Fig. 14 is a plan view of the disk cartridge of Fig. 13 showing an open state of the disk.

Fig. 15 is a plan view showing the overall structure of the disc cartridge in the fifth embodiment of the present invention, showing the closed state of the shutter.

Fig. 16 is a sectional view showing the vicinity of a disk holding member of the disk cartridge of Fig. 15 .

Fig. 17 is a plan view showing the overall structure of the disc cartridge of Fig. 15 showing a state in which a shutter is opened.

Fig. 18 is a sectional view of a disk holding member of the disk cartridge of Fig. 17.

Fig. 19 is a plan view showing the overall structure of the disc cartridge according to Embodiment 6 of the present invention, showing the closed state of the shutter.

Fig. 20 is a plan view showing the overall structure of the disc cartridge of Fig. 19 showing a state in which the shutter is opened.

Fig. 21 is a plan view showing the overall structure of the disk cartridge in the seventh embodiment of the present invention, showing the shutter closed state.

Fig. 22 is a plan view showing the overall structure of the disc cartridge of Fig. 21 showing a state in which the shutter is opened.

Fig. 23 is a perspective view showing the overall structure of the disk cartridge in Embodiment 8 of the present invention.

Fig. 24 is a detached isometric view showing a state in which the disk cartridge of Fig. 23 is detached.

Fig. 25 is a perspective view showing a closed state of the shutter when the disc cartridge of Fig. 23 has no cartridge main body and no magnetic disk.

Fig. 26 is a perspective view showing a state where the shutter is opened when there is no cartridge main body and no magnetic disk in the cartridge of Fig. 23;

Fig. 27 is a perspective view showing a closed state of the shutter when there is no magnetic disk in the cartridge of Fig. 23;

Fig. 28 is a perspective view showing a state in which the shutter is opened when there is no magnetic disk in the cartridge of Fig. 23;

Fig. 29 is a partial cross-sectional view showing a section through the center of the disk of the disk cartridge of Fig. 23;

Fig. 30 is a sectional view showing a part of the shutter of the disc cartridge of Fig. 23;

Fig. 31 is a partial plan view showing the vicinity of the operation portion of the disk cartridge of Fig. 23;

Fig. 32 is a perspective view showing the vicinity of the drop preventing member of the disc cartridge of Fig. 23;

Fig. 33 is a front view showing the disc cartridge of Fig. 23 viewed from the drive insertion direction.

Fig. 34 is a perspective view showing the overall structure of the disk cartridge according to Embodiment 9 of the present invention.

Fig. 35 is a disassembled isometric view showing a disassembled state of the disk cartridge of Fig. 34;

Fig. 36 is a perspective view showing a closed state of the shutter when there is no disk in the cartridge of Fig. 34;

Fig. 37 is a perspective view showing a state in which the shutter is opened when there is no magnetic disk in the cartridge of Fig. 34;

Fig. 38 is a partial cross-sectional view showing a closed shutter state, taken through the disk center section of the disk cartridge of Fig. 34;

Fig. 39 is a partial cross-sectional view showing a shutter-opened state taken through the disk center section of the disk cartridge of Fig. 34;

Fig. 40 is a cross-sectional view showing a closed shutter state of a section passing through the disk center of the disk cartridge of Fig. 34 near the periphery of the disk.

Fig. 41 is a cross-sectional view showing a state in which a shutter is opened, passing through the disk center of the disk cartridge of Fig. 34 near the periphery of the disk.

Fig. 42 is a perspective view showing the overall structure of the disk cartridge according to Embodiment 10 of the present invention.

Fig. 43 is a detached isometric view showing a state in which the disc cartridge of Fig. 42 is detached.

Fig. 44 is a perspective view showing a closed state of the shutter when there is no disk in the cartridge of Fig. 42;

Fig. 45 is a perspective view showing a state in which the shutter is opened when there is no disk in the cartridge of Fig. 42;

Fig. 46 is a partial cross-sectional view showing a shutter-closed state taken through the disc center section of the disc cartridge of Fig. 42;

Fig. 47 is a partial cross-sectional view showing a state in which the shutter is opened, taken through the disk center section of the disk cartridge of Fig. 42;

Fig. 48 is a cross-sectional view showing a closed state of the disk through the center of the disk in the disk cartridge of Fig. 42, and showing the outer periphery of the disk.

Fig. 49 is a cross-sectional view showing a state in which a shutter is opened, taken through the disc center of the disc cartridge of Fig. 42 and taken along the disc periphery.

Fig. 50 is a perspective view showing the overall structure of the disk cartridge according to Embodiment 11 of the present invention.

Fig. 51 is a detached isometric view showing a state in which the disc cartridge of Fig. 50 is detached.

Fig. 52 is a perspective view showing a closed state of the shutter when there is no magnetic disk in the cartridge of Fig. 50;

Fig. 53 is a perspective view showing a state in which the shutter is opened when there is no magnetic disk in the cartridge of Fig. 50;

Fig. 54 is a partial cross-sectional view showing a shutter-closed state through a disc center section of the disc cartridge of Fig. 50;

Fig. 55 is a partial cross-sectional view showing a state in which the shutter is opened, taken through the disk center section of the disk cartridge of Fig. 50;

Fig. 56 is a sectional view showing a part of the shutter of the disc cartridge of Fig. 50;

Fig. 57 is a partial plan view showing the vicinity of the operation portion of the disk cartridge of Fig. 50;

Fig. 58 is a perspective view showing a closed state of the shutter when there is no magnetic disc in the disc cartridge according to the twelfth embodiment of the present invention.

Fig. 59 is a partial cross-sectional view showing a closed shutter state through the center section of the disk cartridge of Fig. 58;

Fig. 60 is a perspective view showing a state in which the shutter is opened when the disk cartridge of Fig. 58 has no magnetic disk.

Fig. 61 is a partial cross-sectional view showing a shutter-opened state through the center section of the disk cartridge of Fig. 58;

Fig. 62 is a modified example of the disk cartridge of Fig. 58, showing a perspective view showing a closed state of the shutter when there is no disk.

Fig. 63 is a perspective view of the disk cartridge of Fig. 58, showing a state in which the shutter is opened when there is no disk.

Fig. 64 is a perspective view showing the overall structure of the disk cartridge in Embodiment 13 of the present invention.

Fig. 65 is a detached isometric view showing a state in which the disc cartridge of Fig. 64 is detached.

Fig. 66 is a schematic plan view showing the shutter closed state of the disk cartridge of Fig. 64;

Fig. 67 is a schematic plan view showing a state in which the shutter is opened in the disc cartridge of Fig. 64;

Fig. 68 is a detailed isometric view of a shutter lock unit.

Fig. 69 is a detailed sectional view of the disk holding part of the shutter.

Fig. 70 is a cross-sectional view showing the shape of joint surfaces of two shutters.

Fig. 71 is a cross-sectional view showing the shape of joint surfaces of two shutters.

Fig. 72 is a perspective view showing the overall structure of the disk cartridge in Embodiment 14 of the present invention.

Fig. 73 is a perspective view showing a shutter of the disk cartridge of Fig. 72;

Fig. 74 is an enlarged isometric view of the vicinity of a disk holding member of the disk cartridge of Fig. 72.

Fig. 75 is an enlarged isometric view of the vicinity of a disk holding member of the disk cartridge of Fig. 72.

Fig. 76 is an enlarged isometric view of the vicinity of a disk holding member of the disk cartridge of Fig. 72.

Fig. 77 is a schematic plan view showing the closed state of the shutter in the disc cartridge of Fig. 72;

Fig. 78 is a schematic plan view showing a shutter-opened state of the disc cartridge of Fig. 72.

Fig. 79 is a sectional view along line B-B in Fig. 78.

Fig. 80 is a sectional view along line C-C in Fig. 78 .

Fig. 81 is a sectional view along line A-A in Fig. 77.

Fig. 82 is a cross-sectional view showing a modified example of the disk receiving portion.

Fig. 83 is a disassembled isometric view showing a disassembled state of the disk cartridge in Embodiment 15 of the present invention.

Fig. 84 is a schematic plan view showing the closed state of the shutter in the disk cartridge of Fig. 83;

Fig. 85 is a schematic plan view showing a shutter-opened state of the disk cartridge of Fig. 83;

Fig. 86 is a sectional view along line D-D in Fig. 84 .

Fig. 87 is a sectional view along line E-E in Fig. 85.

Fig. 88 is a perspective view showing the overall structure of the disc cartridge in Embodiment 16 of the present invention.

Fig. 89 is a disassembled isometric view showing the disassembled state of the disk cartridge of Fig. 88.

Fig. 90 is a schematic plan view showing the shutter closed state of the disc cartridge of Fig. 88;

Fig. 91 is a schematic plan view showing a shutter-opened state of the disc cartridge of Fig. 88;

Fig. 92 is a schematic plan view showing a shutter-closed state of the disk cartridge of a modified example of the disk cartridge of Fig. 88.

Fig. 93 is a schematic plan view showing a shutter-opened state of the disk cartridge of Fig. 92.

Fig. 94 is a perspective view showing the overall structure of the disk cartridge in Embodiment 17 of the present invention.

Fig. 95 is a disassembled isometric view showing a disassembled state of the disk cartridge of Fig. 94;

Fig. 96 is a schematic plan view showing the closed state of the shutter in the disc cartridge of Fig. 94;

Fig. 97 is a schematic plan view showing a shutter-opened state of the disc cartridge of Fig. 94;

Fig. 98 is a perspective view showing the overall structure of the disk cartridge in Embodiment 18 of the present invention.

Fig. 99 is a disassembled isometric view showing the disassembled state of the disk cartridge of Fig. 98.

Fig. 100 is a schematic plan view showing the closed state of the shutter in the disc cartridge of Fig. 98;

Fig. 101 is a schematic plan view showing a shutter-opened state of the disc cartridge of Fig. 98;

Fig. 102 is a disassembled isometric view showing a disassembled state of the disk cartridge in Embodiment 19 of the present invention.

Fig. 103 is an enlarged sectional view showing the vicinity of a disk holding member of the disk cartridge of Fig. 102.

Detailed ways

(Example 1)

Below, in conjunction with Fig. 1 of the isometric view of its overall structure and magnetic disk 100 viewed from obliquely above, Fig. 2 of the isometric view viewed from obliquely below, and Fig. 3 of the isometric view of each part showing the disassembled state, the present invention will be described. Embodiment 1 Disk cartridge 301.

In addition, the magnetic disk 100 has a first surface and a second surface. In FIG. 1 , the first surface represents a surface on which a disk mark is usually written. The signal recording surface 100A serving as the second surface of the magnetic disk 100 is shown as the rear surface in FIG. 3 .

As shown in FIG. 1 , the disc case 301 includes: a disc case lower body 11 , a disc case upper body 12 , disk holding parts 13 , 14 and a shutter 21 .

As shown in FIG. 3 , the disc cartridge lower body 11 is provided with a clamping opening 11 c for entering the spindle motor and the clamping member of the rotating magnetic disc 100 from the outside, and for reproducing or recording signals on the signal recording surface 100A of the magnetic disc 100 . At least one of the magnetic heads can enter and select the magnetic head opening portion 11h that is opened. In addition, a pair of positioning holes 11w for positioning the disk cartridge 301 with respect to the magnetic disk drive are provided to engage with a pair of cartridge positioning pins 210 of the magnetic disk drive. The cartridge lower body 11 faces the signal recording surface 100A of the magnetic disk 100 .

The upper body 12 of the disk case enables loading and unloading of the disk 100, and has a circular disk opening 12w for opening the entire projected area of the disk 100 where the upper surface of the disk is exposed. The upper body 12 of the disc case and the lower body 11 of the disc case are bonded or welded at the edges to form the main body 10 of the disc case.

The first inner side 11u of the lower body 11 of the disc case facing the signal recording surface 100A of the magnetic disc 100 and the second inner side 12i of an approximately cylindrical shape constituting the disc opening 12w of the upper body 12 of the disc case constitute the disc storage for storing the magnetic disc 100. Section 10d (FIG. 1). In this way, the first inner surface 11u becomes the bottom of the magnetic disk storage portion 10d. A protective layer 11p is provided on the first inner surface 11u of the lower body 11 of the disk case to prevent damage to the magnetic disk 100 or dust from entering the signal recording surface 100A.

For the protective layer 11p, an appropriate one can be selected from non-woven fabric for damage prevention, non-woven fabric for dust prevention, coating for damage prevention, and coating for dust prevention. In this embodiment, a thin plate made of dustproof nonwoven fabric is bonded or ultrasonically welded as the protective layer 11p.

The magnetic disk storage part 10d is provided with a gap to the extent that the magnetic disk 100 can rotate between the second inner surface 12i and the magnetic disk 100 . Moreover, the upper surface of the disk storage part 10d becomes the disk opening part 12w, and the magnetic disk 100 held in the disk storage part 10d exposes one surface to the outside from the disk opening part 12w.

As shown in FIG. 3, the disk holding member 13 has a pair of elastic members 13d and a hole 13w penetrating there obliquely, and the disk cartridge 301 has two disk holding members 13 of the same shape. Since the elastic member 13d of the disk holding member 13 is clamped between the upper body 12 of the disk case and the lower body 11 of the disk case, the front end of the disk holding member 13 is strongly supported in the arrow direction 13B, so that the disk 100 is held down in the first position. Medial side 11u. In addition, this pair of disk holding members 13 is arranged such that the hole portion 13w is located directly above the respective pair of positioning holes 11w.

The disk holding member 14 has a rotary shaft 14s and an elastic portion 14d. The disk holding part 14 that can rotate around the rotation axis 14s is fixed on the disk case main body 10, and since the elastic part 14d is sandwiched between the disk case upper body 12 and the disk case lower body 11, the front end of the disk holding part 14 is pushed toward the arrow direction 14B. strong support. Thus, the magnetic disk 100 is pressed against the first inner surface 11u.

The shutter 21 faces the signal recording surface 100A of the magnetic disk 100 and is provided outside the cartridge lower body 11 . As shown in FIGS. 1 and 2 , the shutter moves in the arrow direction 21A or 21B to open or close the clamping opening 11c and the magnetic head opening 11h. The shutter spring 31 is stretched and installed between the shutter 21 and the main body 10 of the disk cartridge, and supports with force in the direction of closing the shutter 21 .

As shown in FIG. 2 , on the surface of the disc case main body 10 (disk case lower body 11 ), there is a marking surface or a concave portion 10f which can record the written content of the stored magnetic disc 100 . In addition, the pair of recesses 10c provided on the left and right sides of the cartridge main body 10 can be used as stop fittings for introduction or concave surfaces for positioning when the drive device loads the disk cartridge 301 or when the cartridge 301 is installed in the changer. In addition, the concave portion 10g provided only on one side is in a shape to prevent wrong insertion, and only when the disc cartridge 301 is inserted in the correct direction, can it cooperate with the protrusion provided on the drive unit normally. On the other hand, when the disk cartridge 301 is inserted into the drive device in the wrong direction up and down or front and back, it interferes with each other and cannot be inserted. In this way, wrong insertion can be prevented.

Here, the operation of holding the magnetic disk 100 by the disk holding members 13 and 14 will be described in detail with reference to FIGS. 4 and 5 . 4 and 5 are radial cross-sectional views of the disk holding member 13 and the disk holding member 14 in the state where the disk 100 shown in FIGS. 1 to 3 is held, respectively.

As shown in FIG. 4 and FIG. 5 , the front ends of the disk holding members 13 and 14 are provided with inclined surfaces 13 ′ and 14 ′ extending obliquely upward from the outer periphery of the disk 100 on the projected area of the disk. Due to the action of the elastic portion 13d and the elastic portion 14d, the disk holding members 13 and 14, which are energized and supported in the arrow direction 13B and the arrow direction 14B, make the inclined surfaces 13' and 14' contact the corners 100c on the outer periphery of the magnetic disk 100, and hold the magnetic disk 100. At the same time, the magnetic disk 100 is pressed in the thickness direction 100t so that the signal recording surface 100A is in surface contact with the thin plate 11p. In this way, the magnetic disk 100 is kept fixed to the cartridge main body 10 . In this state, since the outer peripheral portion of the signal recording surface 100A of the magnetic disk 100 is in close contact with the thin plate 11p, dust can be prevented from adhering to the signal recording surface 100A.

Next, the operation of releasing the magnetic disk 100 by the disk holding members 13 and 14 will be described in detail with reference to FIGS. 6 , 7 and 8 .

FIG. 6 is a perspective view of the disc cartridge with the disc cartridge upper body 12 and the magnetic disk 100 removed. In FIG. 6, the shutter 21 pushes the L-shaped portion 21s in the direction of arrow 21A by the disk drive opening mechanism not shown in the figure, and as a result, the clamping opening 11c and the magnetic head opening 11h are opened to the outside. In addition, a pair of cartridge positioning pins 210 of the disk drive unit are fitted into the positioning holes 11w of the cartridge main body 10 .

7 is a radial sectional view of the disk holding member 13 in the state shown in FIG. 6, and FIG.

As shown in FIG. 7, in the disk holding member 13, if the disk cartridge positioning pin 210 of the disk drive device is inserted into the positioning hole 11w, the disk cartridge positioning pin 210 will fit in the hole 13w obliquely penetrating the disk holding member 13. Accordingly, the disk holding member 13 is lifted in the direction 13A, and the disk 100 is released from the pressure of the inclined surface 13' and becomes a free state. At this time, the eaves 13e at the front end of the disk holding member 13 still protrude over the disk periphery in the disk projection area. Therefore, in the magnetic disk drive device configured to use the magnetic disk 100 vertically, the magnetic disk 100 can be prevented from falling out of the cartridge 301 even if the magnetic disk is in an open state.

As shown in FIG. 8, when the shutter 21 of the disk holding member 14 is in an open state, the guide rib 21x provided on the shutter enters the recess 14w of the disk holding member 14 and pushes the top of the recess 14w upward. In this way, the disk holding member 14 is lifted toward 14A, and the disk 100 is released from the pressure of the slope 14' and becomes a free state. At this time, the eaves 14e at the front end of the disk holding member 14 still protrude over the disk periphery in the disk projection area. Therefore, in the magnetic disk drive device configured to use the magnetic disk 100 vertically, the magnetic disk 100 can be prevented from falling out of the cartridge 301 even if the magnetic disk is in an open state.

In addition, if the disk is to be taken out forcibly, the disk holding member 14 and the pair of disk holding members 13 must be released at three places at the same time. Therefore, it is possible to prevent the operator from simply removing the magnetic disk.

In addition, in this embodiment, as shown in FIG. 2, a brush or dust wiping member is provided on the end 21r of the shutter 21 facing the magnetic disk 100, and the signal recorded on the magnetic disk 100 can be removed along with the opening and closing of the shutter 21. Dust on surface 100A. Alternatively, a locking mechanism may be provided that fixes and supports (locks) the disk holding member to the cartridge main body 10 in a state where the disk is held.

(Example 2)

Next, the disk cartridge 302 according to the second embodiment of the present invention will be described in conjunction with the overall structure plan view 9 showing the state of holding the magnetic disk 100 and the overall structure plan view 10 showing the state of opening the magnetic disk 100 . In FIGS. 9 and 10 , the same components as those in the first embodiment are given the same reference numerals, and description thereof will be omitted.

The disk holding part of the disk case 302 is different from the disk holding part of the disk case 301 of Embodiment 1. As shown in FIG. .

Each disk holding member 15 has an elastic portion 15d. Since the elastic portion 15d is strongly supported in the direction of the arrow 15B, the same as the disk holding members 13 and 14 of Embodiment 1, the magnetic disk 100 is held and fixed on the inclined surface 15' provided at the front end. The disc case main body 10 .

The disk holding member 16 has a rotary shaft 16 c, and the disk holding member 16 rotatable around the rotary shaft 16 c is provided on the cartridge main body 10 . The disk holding member 16 holds and fixes the disk 100 to the cartridge main body 10 by using the inclined surface 16' provided at the front end in the same manner as the disk holding members 13 and 14 of the first embodiment. The disk holding member 15 has a coupling pin 15p, and a groove portion 16g provided in the disk holding member 16 cooperates with the coupling pin 15p to interlock.

If a pair of disc cartridge positioning pins 210 of the disk drive unit fit into the positioning hole 11w of the disc cartridge main body 10, as shown in FIG. The ramp 15' frees the disk 100. In addition, the magnetic disk holding member 16 and the magnetic disk holding member 15 move in the arrow direction 16A in conjunction with the magnetic disk holding member 15 , and the slope 16 ′ also releases the magnetic disk 100 .

(Example 3)

Next, the disc cartridge 303 according to Embodiment 3 of the present invention will be described with reference to the overall structure plan view 11 showing the state of holding the magnetic disk 100 and the overall structure plan view 12 showing the state of opening the magnetic disk 100 . In FIG. 11 and FIG. 12 , the same components as those in the first embodiment are given the same reference numerals, and description thereof will be omitted.

The disk holding part of the disk case 303 is different from the disk holding part of the disk case 301 of Embodiment 1. As shown in FIG. , 18. The respective disk holding members 17, 18 are integrally formed with the cartridge main body 10.

The disk holding member 17 has an elastic portion 17d, and is biased and supported in the arrow direction 17B by the elastic portion 17d. Like the disk holding members 13 and 14 of the first embodiment, the disk holding member 17 also holds the disk 100 on the cartridge main body 10 by using the inclined surface 17' provided at the front end.

The disk holding member 18 also has an elastic portion 18d, and the disk holding member 18 is biased and supported in the arrow direction 18B by the elastic portion 18d. In addition, the magnetic disk 100 is held on the cartridge main body 10 by a slope 18' provided at the front end.

Once this disk cartridge 303 is inserted into the disk drive device 200, the pair of disk release pins 217 provided on the disk drive device 200 pushes the protrusion 17s of the disk holding member 17. Thereby, as shown in FIG. 12 , the disk holding member 17 releases the disk 100 . Simultaneously, the pair of disk release pins 218 provided on the disk drive unit 200 also contact the side surface 18 s of the disk holding member 18 , and the disk holding member 18 releases the disk 100 .

(Example 4)

The disc cartridge 304 of Embodiment 4 of the present invention will be described in conjunction with the overall structure plan view 13 showing the state of holding the magnetic disk 100 and the overall structure plan view 14 showing the state of opening the magnetic disk 100 . In FIG. 13 and FIG. 14, the same components as those in the first embodiment are assigned the same reference numerals, and description thereof will be omitted.

The disk holding member of the disk cartridge 304 is different from the disk holding member of the disk cartridge 301 of the first embodiment, and has an annular disk holding member 19 .

As shown in FIG. 13, the disk holding member 19 is made of an annular elastic member which can freely change shape like a rubber ring. The magnetic disk holding member 19 has an elliptical shape when no force is applied from the outside, but can be changed to a substantially circular shape when a force is applied from the outside. If the deformed disk holding member 19 has a substantially circular shape, its inner diameter is larger than the diameter of the magnetic disk 100 .

As shown in FIG. 13, the magnetic disk holding member 19 contacts the magnetic disk 100 at several oval-shaped points, and holds and fixes the magnetic disk 100 to the cartridge main body 10. As shown in FIG. If this disk cartridge 304 is inserted into the disk drive unit 200, then as shown in FIG. . In this way, the disk holding member 19 becomes a substantially circular shape, and the contact between the magnetic disk 100 and the disk holding member 19 is eliminated. That is, the disk holding member 19 releases the disk 100 .

In order to release the magnetic disk 100, it is also possible to apply the force to deform the magnetic disk holding member 19 to the magnetic disk holding member 19 by the protrusion of the magnetic disk drive unit fitted with the concave portion 10g (FIG. 2) for preventing wrong insertion. Alternatively, it is also possible to apply the disk drive device protrusions provided on the left and right sides of the disk case 304 to the disk drive device introduction recess 10c ( FIG. 2 ) to the disk holding member 19 .

(Example 5)

Next, Embodiment 5 will be described with reference to FIGS. 15 to 18 . Fig. 15 and Fig. 17 are top views showing the structure of the remaining part after removing the upper body of the disc case in the disc case 305 of this embodiment. Fig. 15 shows the state of the shutter 21 closing the openings 11h and 11c, and Fig. 17 shows the state of the shutter 21 opening the opening. 11h, 11c state. 16 and 18 show the state of the disk holding member 43 in the state where the shutter 21 is closed and the state where the shutter 21 is opened.

In this embodiment, the same constituent elements as those of the disc cartridge in Embodiment 1 are assigned the same reference numerals.

The characteristic point of the disk cartridge of this embodiment is that the disk holding and opening operations of the disk holding member 43 are linked with the opening and closing of the shutter 21 by the disk holding interlocking member 44 .

As shown by the arrow 44A in FIG. 15 and FIG. 17 , the disk retaining linkage member 44 is slidably mounted on the first inner surface 11 u of the lower body 11 of the disk cartridge around the lower body 11 c of the disk cartridge. The disk holding interlocking member 44 has a sector shape in which a part of the ring shape that is the inner diameter of the chucking opening 11 c is cut off.

A matching pin 47 protruding toward the lower body 11 of the disk cartridge (in FIG. 15 and FIG. 17 , pointing to the inside of the paper) is provided on the disk holding linkage part 44 . The guide grooves 11m and 21m that cooperate with the matching pin 47 are respectively provided on the lower body 11 of the disk case and the shutter 21. In addition, a plurality of protrusions 45 are provided on the outer periphery of the disk holding linkage member 44 to protrude outward and the upper body of the disk cartridge (inwardly of the paper in FIGS. 15 and 17). The upper surface of the disk holding linkage member 44 is glued with non-woven fabric or coating material to prevent damage to the disk 100 or to prevent dust from adhering to the signal recording surface.

When the disk is loaded into the disk case, in order to hold the outer periphery of the disk, a plurality of disk holding members 43 at certain intervals are provided in the area of the lower body 11 of the disk case. 15 and 17 show the case where three disk holding members 43 are provided, but two, four or more disk holding members 43 may be provided. The disk holding members 43 are slidably supported by the disk cartridge lower body 11 via the rotary shafts 43A, respectively.

As shown in FIG. 16 , the disk holding member 43 is arranged so as to overlap a part of the disk holding link member 44 in the vicinity of the outer periphery thereof. In addition, the disk holding member 43 is pressed in the direction 43B toward the cartridge lower body 11 by a structure (not shown in FIG. 16 ) similar to the elastic portion 14d shown in FIG. 5 . As a result, the inclined surface 43' of the disk holding member 43 contacts the corner of the disk 100 and presses the disk 100 in the direction 43B so that the disk 100 contacts the disk holding link 44 and holds the disk 100.

As shown in Figure 15, if the disk case that holds the magnetic disk (not shown in the figure) is inserted into the disk drive device 200 in the direction of arrow 1A, the shutter opening and closing lever (not shown in the figure) of the disk drive device 200 will make the shutter 21 Move toward 21A to open. When the shutter 21 starts to move in the direction of 21A, the engaging pin 47 of the disk holding linkage member 44 inserted in the guide groove 21m of the shutter 21 is also subjected to the force in the direction of the arrow 21A. As a result, the engagement pin 47 moves along the guide groove 11m of the cartridge lower body 11, and accordingly, the disk holding interlocking member 44 starts to rotate around the locking opening 11c in the direction indicated by the arrow 44A. In order to make the disk holding linkage member 44 link with the shutter 21, the guide groove 11m preferably extends along the moving direction of the shutter 21.

As shown in FIG. 17 , when the shutter 21 is fully opened, the plurality of projections 45 provided on the outer periphery of the disk holding interlocking member 44 are positioned below the disk holding member 43 . As shown in FIG. 18 , the disk holding member 43 is pushed upward due to the protrusion 45 , and the slope 43 ′ of the disk holding member 43 is away from the corner of the disk 100 . As a result, the thrust force 43B of the magnetic disk 100 in the direction perpendicular to the magnetic disk surface is released, and the magnetic disk 100 is released to be rotatable. At this time, the eaves 43 e located at the front end of the disk holding member 43 protrude on the outer periphery of the disk 100 in the projected area of the disk 100 . Therefore, in the magnetic disk drive apparatus that holds the magnetic disk 100 vertically, it is possible to prevent the magnetic disk from falling out of the cartridge even when the magnetic disk is in the released state.

According to the disk cartridge 305 of this embodiment, even if the disk cartridge is not inserted into the disk drive device 200, the disk can be released. For example, when the shutter 21 is opened by hand, the magnetic disk holding member 43 releases the magnetic disk 100 in conjunction with the operation of the shutter 21 . Therefore, according to the intention of the user, the disk can be removed from the cartridge and another disk can be inserted into the cartridge.

(Example 6)

Next, Embodiment 6 of the present invention will be described. Fig. 19 and Fig. 20 are the top views of the structure of the remaining part after removing the upper body of the disc case 306 of the embodiment of the present invention. state. In Fig. 19 and Fig. 20, the same components as those in Embodiment 1 and Embodiment 5 are assigned the same symbols.

The characteristic point of the disk cartridge of this embodiment is that the disk holding interlocking member described in Embodiment 5 also serves as the shutter. 19 and 20, the shutter 46 is provided on the first inner surface 11u of the cartridge lower body 11 so as to slide around the clamping opening 11c of the cartridge lower body 11. The shutter 46 has a sector shape in which a part of a ring having an inner diameter of the locking opening 11c is cut away.

The shutter 46 is provided with a cooperating pin 46p protruding toward the side of the lower body 11 of the disk case (in FIG. 19 and FIG. 20 , pointing to the inner side of the paper). A guide groove 11m for engaging with this engaging pin 46p is provided on the lower body 11 of the cartridge. When the engaging pin 46p is located at one end of the guide groove 11m, the head opening 11h is closed due to the shutter 46, and when the engaging pin 46p is located at the other end of the guide groove 11m, the head opening 11h is opened. The guide groove 11m is located on a partial arc of the concentric circle of the locking opening 11c. In order to open the shutter 46 accompanying the insertion into the disk drive unit, the guide groove 11m preferably extends substantially along the disk insertion direction 1A.

The outer periphery of the shutter 46 is provided with a plurality of protrusions 46c protruding toward the upper body 12 of the disc case (directed from the inside to the outside in FIGS. 19 and 20). The upper surface of the shutter 46 is glued with a non-woven fabric or coating material to prevent damage to the magnetic disk 100 or to prevent dust from adhering to the signal recording surface.

In the region of the lower body 11 of the disc cartridge, a plurality of disc holding members 43 having the same structure as that of the fifth embodiment are provided at regular intervals. The protrusion 46c provided on the disk holding member 43 and the shutter 46 is the same as that described in Embodiment 5, and the disk is held or released in conjunction with the operation of the shutter 46 .

When the disk cartridge of this embodiment is inserted into the disk drive unit 200 in the direction indicated by arrow 1A in FIG. When further inserted into the magnetic disk drive device 200 , the engagement pin 46p starts to move along the guide groove 11m by the action of the engagement member 201 . At the same time, as indicated by arrow 46B, the shutter 46 starts to rotate around the chuck opening 11c of the cartridge lower body 11, and opens the head opening 11h as it rotates.

As shown in FIG. 20, when the disk cartridge is fully inserted into the disk drive device 200, the engagement pin 46p reaches the other end of the guide groove 11m, and the head opening 11h is completely opened. At this time, as described in Embodiment 5, the protrusion 46c is located below the disk holding member 43, and the disk holding member is pushed toward the upper body side of the disk case (the front side of the paper in FIG. 20 ) due to the protrusion 46c. As a result, the magnetic disk 100 held by the magnetic disk holding member 43 is released and becomes freely rotatable.

According to the disk cartridge of the present embodiment, since the disk holding linkage member is not required, it can be thinner than the disk cartridge of the fifth embodiment. In addition, by manually moving the engagement pin 46p along the guide groove 11m, the shutter 46 can be opened and the disk holding member can be released so that the disk can be taken out.

In addition, in this embodiment, the shutter 46 rotates clockwise when viewed from the upper body of the disc case, but it is also possible to rotate the shutter 46 counterclockwise by changing the position of the guide groove 11m.

(Example 7)

Next, Embodiment 7 of the present invention will be described. Fig. 21 and Fig. 22 are the top views of the structure of the remaining part after removing the disc case upper body of the disk case 307 of the embodiment of the present invention. state. Components in FIGS. 21 and 22 that are the same as those in Embodiment 3 and Embodiment 6 are denoted by the same reference numerals.

The structure of the disc holding member of the disc cartridge of this embodiment is different from that of the disc cartridge of the sixth embodiment. Specifically, as shown in FIGS. 21 and 22 , the disk cartridge of this embodiment has a plurality of disk holding members 17 . The disk holding member 17 is the same as the disk holding member described in Embodiment 3, and has an elastic portion 17d. When the shutter 46 is in the closed state, the disk 100 is pushed toward the center direction 17R of the disk to hold the disk by the elastic force of the elastic portion 17d. . In this embodiment, the disk holding member 17 is integrally formed with the lower body 11 of the disk cartridge, but it can also be made separately from the lower body 11 of the disk cartridge.

The radial cross-sectional shape of the disk holding member 17 is the same as that of the disk holding member 43 shown in FIG. 18 , and has an inclined slope protruding upward from the outer periphery of the disk in the projected area of the disk. Therefore, the disk holding member 17 presses the disk against the shutter 46 in such a way that the disk holding member 17 holds the disk by contacting the bevel to the corner of the disk.

The shutter 46 has a plurality of protrusions 46c on its outer periphery. In this embodiment, the protrusion 46c protrudes outward. When the shutter 46 is in an open state, the protrusion 46c can contact the position of the elastic portion 17d of the disk holding member 17, so that the protrusion 46c is arranged on the outer peripheral portion of the shutter 46. .

As shown in FIG. 22, when the shutter 46 is in an open state, the elastic portion 17d of the projection 46c overcomes its elastic force and pushes toward the outer side 17s of the magnetic disk 100. Thus, the disk is freed. However, eaves 17e are respectively provided on the front ends of the disk holding members 17, and even when the disk 100 is released, the eaves 17e still protrude from the projected area of the disk. Therefore, even if a cartridge holding the magnetic disk 100 vertically is inserted into the magnetic disk drive apparatus 200, the magnetic disk 100 will not fall out of the cartridge.

According to the disk cartridge of this embodiment, in addition to the features described in Embodiment 6, the disk holding member 17 and the cartridge lower body 11 can be integrally formed. In this case, the structure of the disc cartridge can be simplified, and the manufacturing cost can be reduced.

(Embodiment 8)

Next, the disk cartridge 308 of Embodiment 8 of the present invention will be described with reference to the figures.

First, the general structure of the disk cartridge 308 will be described with reference to FIGS. 23 and 24. FIG. In addition, like the first embodiment, the magnetic disk 100 shown in FIGS. 23 and 24 has a first surface and a second surface, and FIG. 23 shows the first surface, that is, the surface on which disk marks are usually recorded. The signal recording surface 100A of the second surface of the magnetic disk 100 is shown as the back surface in FIG. 24 .

As shown in FIGS. 23 and 24 , the disc case 308 includes a disc case lower body 11 , a disc case upper body 12 , a pair of shutters 21 , 22 and a fall-off preventing member 23 .

As shown in FIG. 24 , the disc cartridge lower body 11 has a clamping opening 11c for entering a clamping member such as a spindle motor that rotates the magnetic disk 100 from the outside, and at least a portion for reproducing and recording signals on the signal recording surface 100A of the magnetic disk 100. The magnetic head opening part 11h which one magnetic head enters and picks up and opens. The cartridge lower body 11 faces the signal recording surface 100A of the magnetic disk 100 . In addition, the magnetic head opening 11h reaches the side surface of the cartridge lower body 11 .

The upper body 12 of the disk case enables loading and unloading of the disk 100, and has a circular disk opening 12w opening to the entire projected area of the disk 100 for exposing the upper surface of the disk to the outside. The upper body 12 of the disc case and the lower body 11 of the disc case are bonded or welded at the edges to form the main body 10 of the disc case.

The first inner side 11u of the lower body 11 of the disc case facing the signal recording surface 100A of the magnetic disc 100 and the second inner side 12i of an approximately cylindrical shape constituting the disc opening 12w of the upper body 12 of the disc case constitute the disc storage for storing the magnetic disc 100. Section 10d. In this way, the first inner surface 11u becomes the bottom of the magnetic disk storage portion 10d.

The disk housing portion 10d has a gap between the second inner surface 12i and the disk 100 to the extent that the disk 100 can rotate. Moreover, the upper surface of the disk storage part 10d becomes the disk opening part 12w, and the magnetic disk 100 held in the disk storage part 10d exposes one surface to the outside from the disk opening part 12w.

The drop preventing member 23 is detachably attached to the cartridge upper body 12, and a part thereof protrudes toward the disk opening 12w. As shown in FIGS. 23 and 24 , two fall-off preventing members 23 are provided in this embodiment. On the other hand, the disc cartridge main body 12 has a drop preventing member 12s formed integrally with the disc cartridge main body 12 and protruding from the disc opening 12w. The two fall-off preventing members 23 and the fall-off preventing member 12s are arranged at substantially equal intervals on the circumference of the disk opening 12w, and prevent the magnetic disk 100 from falling out of the disk opening 12w. In particular, when the disc cartridge is vertically inserted into the drive unit and used, it exerts a fall-off prevention function.

The shutters 21 and 22 are provided between the signal recording surface 100A of the magnetic disk 100 and the inner surface 11u of the magnetic disk storage portion 10d. The shutters 21 and 22 have rotary holes 21u and 22u respectively, and in the area other than the disk housing portion 10d of the disc case main body 10, a pair of rotary shafts 11s provided on the side opposite to the magnetic head opening 11h are freely rotatably fitted in the rotary holes respectively. 21u and 22u. Therefore, the shutters 21 and 22 move around the rotary shaft 11s to open or close the chuck opening 11c and the head opening 11h.

A cam 21c and a follower 22c are provided in the vicinity of the rotation holes 21u and 22u of the shutters 21 and 22, respectively. The cam 21c and the follower 22c have shapes that mesh with each other, and constitute an interlocking mechanism 20c that opens and closes the shutters 21 and 22 in conjunction.

The surfaces of the shutters 21 and 22 facing the signal recording surface 100A of the magnetic disk are provided with protective layers 21p and 22p for preventing damage to the magnetic disk or entry of dust into the signal recording surface 100A.

For the protective layers 21p and 22p, an appropriate one can be selected from nonwoven fabrics for damage prevention, nonwoven fabrics for dust prevention, coatings for damage prevention, and coatings for dust prevention. In this embodiment, the protective layers 21p and 22p are bonded or ultrasonically welded as protective layers 21p and 22p made of dustproof non-woven fabric.

The shutters 21 and 22 are biased in the closing direction of the shutters 21 and 22 by shutter springs 31 and 32 respectively provided in areas other than the disk housing 10d. The shutters 21 and 22 may be biased and supported in the closing direction by using an elastic member other than a spring.

As shown in FIG. 24, the disk cartridge 308 has disk holding members 21a, 21b, 22a, 22b at the ends of the shutters 21 and 22. As shown in FIG. The disk holding members 21a, 21b, 22a, 22b have inverted tapered slopes on the ends of the shutters 21 and 22 to hold the outer circumference of the disk 100 in a state where the shutters 21 and 22 are closed. Next, the structure and operation of the disk holding members 21a, 21b, 22a, and 22b will be described in detail.

As shown in Figure 23, on the upper surface of disc case main body 10 (disc case upper body 12), be provided with the marking surface 10f that can record the content written in the installed magnetic disc 100, or engrave the direction that the drive unit is inserted into disc case 308 (Arrow 1A) arrow, or recessed portion 10a. In addition, the recesses 10c respectively provided on a pair of side surfaces parallel to the insertion direction 1A of the disc cartridge main body 10 can be used as a cooperating limit recess or a positioning recess when the drive device loads the disc cartridge 308 or stores the disc cartridge 308.

25 is a perspective view showing a state in which the shutters 21 and 22 close the chucking opening 11c and the magnetic head opening 11h when the cartridge upper body 12 and the magnetic disk 100 are not present. In FIG. 25, the disk holding members 21a, 21b, 22a, 22b provided on the shutters 21 and 22 are positioned so as to grasp the outer periphery of the disk 100 (not shown).

FIG. 26 is a perspective view showing a state in which the shutters 21 and 22 open the clamping opening 11c and the magnetic head opening 11h when the cartridge upper body 12 and the magnetic disk 100 are not present. The shutters 21 and 22 rotate around the rotation holes 21u and 22u to open the clamping opening 11c and the magnetic head opening 11h to the outside. In addition, as the shutters 21, 22 move, the disk holding members 21a, 21b, 22a, 22b also rotate around the rotation holes 21u, 22u, and become separated from the outer periphery of the disk 100 (not shown).

27 is a perspective view showing a state in which the shutters 21 and 22 close the chuck opening 11c and the head opening 11h to the outside when the magnetic disk 100 is not present. As shown in FIG. 27, the disk holding members 21a, 21b, 22a, and 22b protrude from the disk storage portion 10d and hold the disk 100 (not shown). On the other hand, FIG. 28 is a perspective view showing a state in which the shutters 21 and 22 open the chuck opening 11c and the magnetic head opening 11h without the magnetic disk 100. As shown in FIG. 28, when the shutters 21 and 22 are opened, the disk holding members 21a, 21b, 22a, and 22b are housed in areas other than the disk storage portion 10d of the cartridge main body.

Next, the structures and actions of the shutters 21 and 22 will be further described in detail with reference to FIGS. 29 , 30 and 31 . FIG. 29 is a sectional view through the center of the magnetic disk 100. As shown in FIG. As shown in Figure 29, a notch 10w is provided on the second inner surface 12i of the disk storage part 10d of the disc case main body 10, so as not to interfere with the opening and closing action of the shutter 22 (21), and a notch 10w is also provided on the disc case main body 10. The shutter storage part 10s which stores a part of the shutter 22 (21) in the open state is stored. In addition, when the shutter is closed, at least the edge portions 21f and 22f aligned on the head opening 11h and the clamping opening 11c among the edge portions of the shutter 21 on the shutter 22 are overlapped in the thickness direction of the magnetic disk 100 as shown in FIG. shown.

On the other hand, as shown in FIG. 30, the disk holding members 21a, 21b, 22a, 22b have the shape of an inclined slope 21a' (21b', 22a', 22b') protruding upward toward the outer periphery of the disk 100 on the disk projection area. . That is, the inclined surface 21 a ′ has an inverted tapered shape and is inclined toward the magnetic disk 100 . When the shutters 21 and 22 close the magnetic head opening 11h and clamp the opening 11c and the magnetic head opening 11h, while holding the magnetic disk 100 by making the inclined surface 21a' contact the corners of the magnetic disk 100, press the magnetic disk 100 in the thickness direction 100t, The magnetic disk 100 is kept fixed to the cartridge main body 10 by bringing the signal recording surface 100A into surface contact with the plates 21p and 22p of the shutters 21 and 22 . In this state, the signal recording surface 100A of the magnetic disk 100 is in close contact with the plates 21p and 22p, so dust can be prevented from adhering to the signal recording surface 100A.

In addition, by forcibly rotating one surface of the magnetic disk 100 exposed from the outside or by forcibly opening and closing the shutters 21 and 22, dirt such as dust and fingerprints adhering to the signal recording surface 100A of the magnetic disk 100 can be wiped off.

In addition, as shown in FIG. 31, the shutter 21 is integrally formed with a shutter opening and closing operation portion 21t for opening and closing the shutter from the outside, an elastic portion 21v, and a locking protrusion 21k formed by these. When the shutter 21 closes the clamping opening 11c and the magnetic head opening 11h, as shown in FIG. The shutter 21 is fixedly supported on the disc cartridge body 10 to prevent the shutter 21 from rotating. When the shutter 21 is fixed, the shutter 22 coupled by the linkage mechanism 20c is also fixed.

Thereby, utilize projection from the outside, push locking protruding part 21k to the direction of arrow 20A, while canceling the cooperation between locking hole 10k, push opening and closing operation part 21t to the direction of arrow 20B at the same time, just can make shutter 21 and 22 are rotated to open the locking opening 11c and the head opening 11h to the outside, and at the same time, the holding of the magnetic disk 100 by the magnetic disk holding members 21a, 21b, 22a, 22b can be released. In this way, the operator can be prevented from simply removing the disk.

The structure and operation of the fall-off preventing member 23 will be described in detail with reference to FIGS. 24 and 32 . FIG. 32 is a perspective view of the detachable fall-off preventing member 23 as seen obliquely after being turned upside down. The fall-off preventing member 23 is detachably mounted with its projections 23a, 23b, 23c fitted in the recesses 12a, 12b, 12c near the disk opening 12w of the disk cartridge upper body 12 shown in FIG. 24 .

The mechanism for preventing wrong insertion of the disk cartridge 308 into the drive unit will be described in more detail with reference to FIG. 33 . FIG. 33 is a front view seen from the insertion direction (arrow 1B) of the disk cartridge 308 in FIG. 23 into the drive unit. As shown in FIG. 33, a recess 10g is formed on one side of the cartridge main body 10 at a position deviated from the center of the thickness, and is asymmetrical with respect to the insertion direction 1A (FIG. 23) into the drive unit.

Due to such a structure, only when the protruding portion of the drive device is sunk into the concave portion 10g, can the disc cartridge 308 be correctly inserted into the drive device, and the drive device works normally.

Conversely, if the disc cartridge 308 is inserted into the drive unit by mistake, the protrusions on the drive unit interfere with the side without the recess 10g, and the disc cartridge 308 cannot be inserted into the drive unit. In addition, if the disk cartridge 308 is inserted upside down and upside down by mistake, the protrusion provided on the drive unit interferes with the side surface without the recess 10g, and the insertion cannot be performed. In this way, wrong insertion can be prevented.

In addition, various changes can be made to the disc cartridge 308 described in this embodiment.

For example, when the shutters 21 and 22 are in the closed state, the fall-off preventing member 23 does not protrude from the upper surface 12f (FIG. 24) of the cartridge upper body 12, further reducing the thickness of the cartridge main body 10. Then, when the shutters 21 and 22 are in the open state, when the disk holding members 21a, 22a are lowered by the falling-off preventing member 23 in conjunction with the opening operation of the shutters 21, 22, the method of pushing the protrusion 23a of the falling-off preventing member 23 from below, The drop preventing member 23 is made to protrude from the upper surface 12f of the cartridge upper body 12. As shown in FIG. According to such a structure, not only the space required for the disk 100 to rotate inside the disk storage portion 10d is sufficiently ensured, but also the thickness of the disk case can be further reduced.

In addition, the fall-off preventing member 23 is integrally formed with the disc cartridge main body 10 and has a foldable structure, so that the fall-off preventing member 23 can be pulled out.

In addition, the shutter springs 31, 32 may bias and support the direction in which the shutters 21, 22 are opened. As long as the linkage mechanism makes the action between the shutters reliable, only one of the shutter springs 31 and 32 is also acceptable.

In addition, the locking protrusion 21k is provided on the shutter 21, but it is also possible to form the locking protrusion and the protrusion with the elastic portion of the locking lever formed on the disc case main body 10 interposed between the front end and from the locking protrusion provided on the disc. It is also possible that the locking hole of the box main body pushes the locking protrusion to release the cooperation between the protrusion and the recess on the shutter to open the shutter and make it rotate freely. In this case, a resin spring in which the lock lever, the shutter spring, and the cartridge main body 10 are integrally formed is also possible.

(Example 9)

Next, a disc cartridge 309 according to Embodiment 9 of the present invention will be described with reference to the drawings.

As shown in FIGS. 34 and 35 , the disc case 309 includes a disc case lower body 41 , a disc case upper body 42 , drop preventing members 42 a , 42 b , 42 c , 42 d and a pair of shutters 51 and 52 .

As shown in FIG. 35 , the cartridge lower body 41 has a chucking opening 41c that is opened so that a chucking member such as a spindle motor that rotates the magnetic disk 100 from the outside can enter, and performs signal reproduction and recording on the signal recording surface 100A of the magnetic disk 100 . At least one of the magnetic heads enters and selects the magnetic head opening 41h that is opened. The cartridge lower body 41 faces the signal recording surface 100A of the magnetic disk 100 . In addition, the magnetic head opening 41h reaches the side surface of the cartridge lower body 41 .

The upper body 42 of the disk case has a circular head opening 42w opening in the entire projected area of the disk 100 in order to allow the disk 100 to be inserted and taken out, so as to expose the upper surface of the disk. The disk cartridge upper body 42 and the disk cartridge lower body 41 are bonded or welded at the edge portions to form the disk cartridge main body 40 .

The first inner surface 41u of the lower body 41 of the disc case facing the signal recording surface 100A of the magnetic disc 100 and the substantially circular second inner side 42i constituting the disc opening 42w of the upper body 42 of the disc case constitute the disc storage portion for storing the magnetic disc 100. 40d. In this way, the first inner surface 41u becomes the bottom of the magnetic disk storage portion 40d.

There is a gap for the disk 100 to rotate between the second inner surface 42i of the disk storage portion 40d and the disk 100 . Moreover, the upper side of the disk storage part 40d is the disk opening part 42w, and the magnetic disk 100 fixed to the disk storage part 40d exposes one surface from the disk opening part 42w.

The fall-off prevention members 42a, 42b, 42c, and 42d are separated from the cartridge upper body 42 with a small gap so that a part thereof protrudes toward the disk opening 42w, and are integrally provided on the cartridge upper body 42. The drop preventing members 42a, 42b, 42c, and 42d prevent the magnetic disk 100 from falling out from the magnetic disk opening 42w. In particular, when the disk cartridge is vertically inserted into the drive unit and used, it exhibits its fall-off prevention function. It is also possible that the fall-off preventing members 42a, 42b, 42c, 42d are integrally formed with the upper body 42 of the disc cartridge through elastic members.

The shutters 51 and 52 are provided between the signal recording surface 100A of the magnetic disk 100 and the inner surface 41u of the magnetic disk storage portion 40d. The shutters 51 and 52 have rotary holes 51u and 52u respectively, which are matched with a pair of rotary shafts 41s on the side opposite to the magnetic head opening 41h in the area outside the disk storage portion 40d of the disc case main body 40, and the rotary holes 51u and 52u free turn. Therefore, the shutters 51 and 52 move around the rotary shaft 41s to open or close the chuck opening 41c and the head opening 41h to the outside.

A cam 51c and a follower 52c are provided in the vicinity of the swing holes 51u and 52u of the shutters 51 and 52, respectively. The cam 51c and the follower 52c have shapes that mesh with each other, and form an interlocking mechanism 50c that opens and closes the shutters 51 and 52 in conjunction with each other.

The surfaces of the shutters 51 and 52 facing the signal recording surface 100A of the magnetic disk are provided with protective layers 51p and 52p for preventing damage to the magnetic disk 100 or entry of dust into the signal recording surface 100A.

For the protective layers 51p and 52p, an appropriate one can be selected from nonwoven fabrics for damage prevention, nonwoven fabrics for dust prevention, coatings for damage prevention, and coatings for dust prevention. In this embodiment, a thin plate made of dustproof nonwoven fabric is bonded or ultrasonically welded as the protective layer 11p.

The shutters 51 and 52 are biased toward closing the shutters 51 and 52 by shutter springs 61 and 62 provided in an area outside the disk housing 40d. It is also possible that the shutter springs 61, 62 are biased toward opening the shutters 51 and 52. In addition, as long as the action of the shutter of the linkage mechanism is reliable, it is also possible to provide only one of the shutter springs 61 and 62 .

As shown in FIG. 35, as in the eighth embodiment, disk holding members 51a, 51b, 52a, and 52b are provided at the ends of the shutters 51 and 52. The shutters 51 and 52 are further provided with protrusions 51e, 52e in areas corresponding to the center hole of the magnetic disk 100 as described in detail below.

As shown in FIG. 34, the upper surface of the cartridge main body 40 (cartridge upper body 42) is provided with an arrow or a concave portion 40a marked with a direction (arrow 1A) in which the disk cartridge 309 is inserted into the drive unit. In addition, a pair of side surfaces parallel to the insertion direction 1A of the cartridge main body 40 are respectively provided with recesses 40c. When the drive device loads the disk cartridge 309, or when the disk cartridge 309 is installed in the converter, the concave portion 40c can be used as a cooperating limiting concave portion for drawing out or a concave portion for positioning. In addition, providing this concave portion 40c on only one side of the disk cartridge 309 serves as a front-to-back erroneous insertion prevention mechanism when the disk cartridge 309 is inserted or mounted in the drive device. On the upper surface of the disc cartridge main body 40, a handle portion 40e for the operator to hold the disc cartridge 309 is provided. The anti-slip embossing pattern is given to this handle part 40e.

FIG. 36 is a perspective view of the shutters 51 and 52 in a state in which the chuck opening 41c and the magnetic head opening 41h are closed outside when the magnetic disk 100 is not present. Fig. 37 is a perspective view showing a state in which the shutters 51 and 52 open the chucking opening 41c and the magnetic head opening 41h without the magnetic disk 100.

Next, the structure and operation of the shutters 51 and 52 will be described in more detail. As shown in FIGS. 34 and 35, the disk holding members 51a, 51b, 52a, and 52b provided on the shutters 51 and 52 are the same as in Embodiment 8, and have an inclined slope shape protruding upward from the outer periphery of the disk 100 in the disk projection area. That is, the slope has an inverted tapered shape and is inclined toward the magnetic disk 100 . Accordingly, the same effect as that of the eighth embodiment is exerted.

In addition, the shutter 52 is provided with an opening and closing operation portion 52t for opening and closing the shutter from the outside, and the shutter 51 is provided with an elastic portion 51v and a locking protrusion 51k formed by this is integrally formed. Thus, when the shutters 51 and 52 are in the state of closing the clamping opening 41c and the magnetic head opening 41h, the locking protrusion 51k supported by the elastic part 51v is fitted into the locking hole 40k of the disc cartridge main body 40, and the shutter 51 is fixed on the disk case body 40. The cartridge main body 40 does not rotate. If the shutter 51 is fixed, the shutter 52 coupled by the linkage mechanism is also fixed.

Thus, as shown in FIG. 36, the locking projection 51k is pushed in the direction of the arrow 50A from the outside using the protrusion, and the opening and closing operation part 52t is pushed in the direction of the arrow 50B while releasing the engagement with the locking hole 40k. Only then can the shutters 51 and 52 be rotated to open the clamping opening 41c and the head opening 41h, and at the same time, the fixing of the magnetic disk 100 due to the magnetic disk holding members 51a, 51b, 52a, 52b can be released. In this way, the operator can be prevented from simply removing the disk.

In addition, unlike Embodiment 8, the locking projections 51k and the opening and closing operation portions 52t provided on the shutters 51 and 52 are provided on the respective shutters 51 and 52, respectively. Such a structure is effective in a cartridge for a small-diameter magnetic disk. This is because the disc cartridge and the shutter as a whole become smaller in a disc cartridge for a small diameter, and it is difficult in design to provide a locking protrusion and an opening and closing operation portion on one shutter. In addition, even if the lock protrusion and the opening and closing operation part are provided on one shutter, the gap between the shutter opening and closing mechanism and the unlocking mechanism on the side of the drive device becomes very small, requiring a small space. Since two mechanisms are provided, the design of the driving device also becomes difficult.

In addition, the locking protrusion 51k is formed on the shutter 51, but it is also possible to form the locking protrusion and the protrusion by interposing the elastic part of the locking lever formed on the disc case main body 40 at the front end in the middle, and from the case provided on the disc case main body. It is also possible to release the cooperation between the protrusion and the concave part on the shutter by pushing the locking protrusion through the locking hole in the locking hole, and open the shutter so that it can rotate freely. In this case, a resin spring in which the lock lever, the shutter spring, and the cartridge main body 40 are integrally formed is also possible.

Next, the functions of the protrusions 51e and 52e provided on the shutters 51 and 52 will be described. FIG. 38 is a sectional view passing through the center of the magnetic disk 100 near the center of the magnetic disk. As shown in FIG. 38, when the shutters 51, 52 are closed, the protrusions 51e, 52e protrude from the central hole 100h, and the magnetic disk 100 is in surface contact with the shutters 51, 52.

As shown in FIG. 39 , when the shutters 51 and 52 are turned into an open state, the protrusions 51e and 52e sneak under the magnetic disk 100 from the center hole 100h, lift the magnetic disk 100, and release the surface contact between the shutters 51 and 52 and the magnetic disk 100. Accordingly, when the shutters 51 and 52 are opened and closed, damage to the signal recording surface 100A can be prevented. Since the movement area of the protrusions 51e and 52e for the opening and closing of the shutters 51 and 52 is located within the signal recording area of the signal recording surface 100A, the protrusions 51e and 52e will not contact the signal recording area and will not damage the signal recording area.

Next, the structure and operation of the fall-off preventing member will be described in more detail with reference to FIGS. 40 and 41 . 40 is a sectional view of the vicinity of the disk periphery passing through the center of the disk 100, and protrusions 42c' (42a', 42b', 42d') are formed on the back of the fall-off prevention member 42c (42a, 42b, 42d). As shown in FIG. 40, when the shutters 51 and 52 are closed, the fall-off preventing member 42c is approximately parallel to the magnetic disk 100, and is housed within the thickness of the disk case 309. The appearance of the disc cartridge 309 in this state is shown in FIG. 36 .

As shown in Figure 41, when the shutters 51, 52 are in the open state, the inclined parts 52f, 51f, 51d, 52d formed on the shutters 51, 52 are in contact with the protrusions 42a', 42b', 42c', 42d' respectively, so that they will fall off. The preventing members 42 a , 42 b , 42 c , 42 d are pushed upward of the magnetic disk 100 . The appearance of the disk cartridge 309 in this state is shown in FIG. 37 . Due to such a structure, the magnetic disk 100 can be prevented from coming off from the disk cartridge 309, especially during the period when the disk cartridge 309 is vertically inserted into the disk drive until the magnetic disk 100 is clamped. On the other hand, when the magnetic disk 100 is clamped, the space in which the magnetic disk 100 operates can be enlarged. In addition, with such a structure, the thickness of the main body of the disc cartridge can be further reduced.

In addition, when the shutters 51 and 52 are in the open state, in order to maintain the temporary shutter open state, the inclined parts 52f, 51f, 51d, and 52d are provided with stopper protrusions 42a' (42b', 42c', 42d') A raised portion or a recessed portion is also possible.

(Example 10)

Next, a disc cartridge 310 according to Embodiment 10 of the present invention will be described with reference to the drawings. The main feature of the disc cartridge 310 of this embodiment is that a drop-off preventing member is provided on the shutter.

As shown in FIGS. 42 and 43 , the disc case 310 includes a disc case lower body 71 , a disc case upper body 72 , drop preventing members 81 d , 81 f , 82 d , and a pair of shutters 81 and 82 .

As shown in FIG. 43 , the cartridge lower body 71 has a chucking opening 71c that is opened so that a chucking member such as a spindle motor that rotates the magnetic disk 100 from the outside can enter, and performs signal reproduction and recording on the signal recording surface 100A of the magnetic disk 100 . At least one of the magnetic heads can enter and select the magnetic head opening portion 71h that is opened. The cartridge lower body 71 faces the signal recording surface 100A of the magnetic disk 100 . In addition, the magnetic head opening 71h reaches the side surface of the cartridge lower body 71 .

The upper body 72 of the disk case is capable of loading and unloading the disk 100, and has a circular head opening 72w opening in the entire projected area of the disk 100, so as to expose the upper surface of the disk. The disk cartridge upper body 72 and the disk cartridge lower body 71 are bonded or welded at the edge portions to form the disk cartridge main body 70 .

The first inner surface 71u of the lower body 71 of the disk case facing the signal recording surface 100A of the magnetic disk 100 and the second approximately circular inner surface 72i constituting the disk opening 72w of the upper body 72 of the disk case constitute the disk storage portion for storing the magnetic disk 100. 70d. In this way, the first inner side surface 71u becomes the bottom of the disk storage portion 70d.

There is a gap for the disk 100 to rotate between the second inner surface 72i of the disk storage portion 70d and the disk 100 . In addition, a disk opening 72w is formed above the disk storage portion 70d, and one surface of the disk 100 held in the disk storage portion 70d is exposed from the disk opening 72w.

The shutters 81 and 82 are provided between the signal recording surface 100A of the magnetic disk 100 and the inner surface 71u of the magnetic disk storage portion 70d. The shutters 81 and 82 have rotary holes 81u and 82u respectively, which are matched with a pair of rotary shafts 71s on the side opposite to the magnetic head opening 71h outside the disk storage portion 70d of the disc case main body 70, and the rotary holes 81u, 82u free turn. Therefore, the shutters 81 and 82 move around the rotary shaft 71s to open or close the chuck opening 71c and the head opening 71h to the outside.

A cam 81c and a follower 82c are provided in the vicinity of the rotation holes 81u and 82u of the shutters 81 and 82, respectively. The cam 81c and the follower 82c have shapes that mesh with each other, and form an interlocking mechanism 80c that opens and closes the shutters 81 and 82 in conjunction with each other.

The surfaces of the shutters 81 and 82 facing the signal recording surface 100A of the magnetic disk are provided with protective layers 81p and 82p which prevent the magnetic disk 100 from being damaged or dust from entering the signal recording surface 100A.

For the protective layers 81p and 82p, an appropriate one can be selected from a nonwoven fabric for preventing damage, a nonwoven fabric for preventing dust, a coating for preventing damage, and a coating for preventing dust. In this embodiment, thin plates made of dust-proof non-woven fabric are used as protective layers 81p, 82p by bonding or ultrasonic welding.

The shutters 81 and 82 are biased toward closing the shutters 81 and 82 by shutter springs 91 and 92 provided in the area outside the disk housing 70d. It is also possible that the shutter springs 91, 92 are biased toward opening the shutters 81 and 82. In addition, as long as the action of the shutter of the linkage mechanism is reliable, it is also possible to provide only one of the shutter springs 91 and 92 .

As shown in FIG. 43, as in the eighth embodiment, the shutters 81 and 82 are provided with disk holding members 81a, 81b, 82a, and 82b at the ends. Projections 81e, 82e are also provided on the shutters 81, 82.

As will be described in detail below, the fall-off preventing members 81f, 81d, 82d are provided near the disk holding members 81a, 81b, 82b of the shutters 81, 82, respectively, and are integrally formed with the shutters 81, 82. It is also possible that the fall-off prevention members 81f, 81d, and 82d are integrally formed with the shutters 81, 82 via elastic members.

As shown in FIG. 42, the upper surface of the cartridge body 70 (cartridge upper body 72) is provided with an arrow or a concave portion 70a marked in the direction (arrow 1A) of inserting the disc cartridge 310 into the drive unit. In addition, a pair of side surfaces parallel to the insertion direction 1A of the cartridge main body 70 are respectively provided with recesses 70c. When the drive device loads the disc cartridge 310, or when the disc cartridge 310 is installed in the converter, the concave portion 70c can be used as a cooperating limiting concave portion for drawing out or a concave portion for positioning. In addition, providing this recessed portion 70c on only one side of the disk cartridge 310 serves as a front-to-back erroneous insertion prevention mechanism when the disk cartridge 310 is inserted or mounted in the drive device. On the upper surface of the disc cartridge main body 70, a handle portion 70e for the operator to hold the disc cartridge 310 is provided. The anti-slip embossing pattern is given to this handle part 70e.

FIG. 44 is a perspective view showing a state in which the shutters 81 and 82 close the chuck opening 71c and the head opening 71h to the outside when the magnetic disk 100 is not present. FIG. 45 is a perspective view showing a state in which the shutters 81, 82 open the chuck opening 71c and the magnetic head opening 71h when there is no magnetic disk 100. FIG.

Next, the structure and operation of the shutters 81 and 82 will be described in more detail. As shown in FIGS. 42 and 43, the disk holding members 81a, 81b, 82a, and 82b provided on the shutters 81 and 82 are the same as in Embodiment 8, and have an inclined slope shape protruding upward from the outer periphery of the disk 100 in the disk projection area. That is, the slope has an inverted tapered shape and is inclined toward the magnetic disk 100 . Accordingly, the same effect as that of the eighth embodiment is exerted.

In addition, the shutter 82 is integrally provided with an opening and closing operation portion 82t for opening and closing the shutter from the outside, an elastic portion 82v, and a locking protrusion 82k formed by these. Thus, when the shutters 81, 82 are in the state of closing the locking opening 71c and the magnetic head opening 71h, the locking protrusion 82k supported by the elastic part 82v is fitted into the locking hole 70k of the disc cartridge main body 70 (FIG. 44), The shutter 82 is fixed to the cartridge main body 70 so as not to rotate. If the shutter 82 is fixed, the shutter 81 coupled with the linkage mechanism is also fixed.

Thus, as shown in FIG. 44, the locking protrusion 82k is pushed in the direction of the arrow 70A from the outside by using the protrusion, and the opening and closing operation part 82t is pushed in the direction of the arrow 70B while releasing the engagement with the locking hole 70k. , the shutters 81 and 82 can be rotated to open the clamping opening 71c and the head opening 71h, and at the same time, the fixing of the magnetic disk 100 due to the magnetic disk holding members 81a, 81b, 82a, 82b can be released. In this way, the operator can be prevented from simply removing the disk.

In addition, the locking protrusion 82k is formed on the shutter 82, but it is also possible to form the locking protrusion and the protrusion with the elastic part of the locking lever formed on the disc case main body 70 interposed between the front end, from which it is provided on the disc case. The locking hole of the main body, the method of pushing the locking protrusion, releasing the cooperation between this protrusion and the concave part on the shutter, and opening the shutter to make it rotate freely is also possible. At this time, the lock lever and the shutter spring (elastic member) may also be formed as a resin spring integrated with the cartridge main body 70 .

Next, the structure and operation of the fall-off preventing member will be described in more detail. 46 and 48, when the shutters 81, 82 are closed, the fall-off prevention parts 81f, 81d, 82d are approximately parallel to the magnetic disk 100, and the fall-off prevention parts 81f, 81d, 82d do not protrude from the upper surface of the disk case 310. The appearance of the disc cartridge 310 in this state is shown in FIG. 44 .

As shown in Figures 47 and 49, when the shutters 81, 82 are switched to the open state, the fall-off prevention members 81f, 81d, 82d are formed by the slit 70s provided on the inner side wall of the disk case 70 and the inclined portion 72s provided on the inner upper wall. Guide, pushed to the top of the disk 100. In addition, notches 72a, 72b, and 72c are provided on the disk case 72 to prevent the falling-off prevention parts 81f, 81d, 82d from interfering with the upper body 72 of the disk case when they are lifted up. The appearance of the disc cartridge 310 in this state is shown in FIG. 45 .

In addition, when the shutters 81 and 82 are in the closed state, the fall-off prevention members 81f, 81d, and 82d are located in the projected area of the magnetic disk 100 and above the magnetic disk 100, so they are held by the shutters 81 and 82 in the thickness direction of the magnetic disk 100. The structure of the magnetic disk 100, whereby the disk holding members 81a, 81b, 82a, 82b of the shutters 81, 82 can be omitted.

With such a structure, it is possible to prevent the magnetic disk 100 from falling out of the magnetic disk cartridge 310, especially from the time the disk cartridge 310 is vertically inserted into the magnetic disk drive unit until the magnetic disk 100 is clamped. On the other hand, when the magnetic disk 100 is clamped, the space in which the magnetic disk 100 operates can be enlarged. In addition, with such a structure, the thickness of the main body of the disc cartridge can be further reduced.

(Example 11)

Next, a disc cartridge 311 according to Embodiment 11 of the present invention will be described with reference to the drawings.

As shown in FIGS. 50 and 51 , the disc case 311 includes a disc case lower body 11 , a disc case upper body 12 , a pair of shutters 21 , 22 and a fall-off preventing member 23 . As shown in FIGS. 52 to 56, the structures and functions of these components are the same as those described in Embodiment 8, and detailed description thereof will be omitted.

As shown in FIGS. 50 and 51, the disc cartridge 311 of this embodiment differs from the disc cartridge 308 of Embodiment 8 in that shutters 21, 22 are provided with holes 20h.

Specifically, when the shutters 21 and 22 of the disk cartridge 311 are in a closed state, a hole 20h is provided on the shutters 21 and 22 corresponding to the center hole 100h of the magnetic disk 100 . The hole 20h is formed by the respective notches 21h and 22h of the shutters 21 and 22 .

According to such a structure, as shown in FIG. 50, when the disk cartridge 311 is placed with the upper surface of the magnetic disk 100 facing upward, the dust entering from the center hole 100h is discharged to the outside through the holes 20h of the shutters 21, 22, and will not remain on the disk. Box 311. That is, dust does not accumulate on the shutters 21 and 22 . Accordingly, when the shutters 21 and 22 are opened, that is, when the drive device is installed, dust can be prevented from adhering to the signal recording surface 100A.

Hole 20h considers to place disc case 311 front (state shown in FIG. 50 ) and reverse (disk case lower body 11 on state), preferably the diameter of hole 20h is approximately equal to the diameter of center hole 100h. This relationship is satisfied to prevent dust from adhering to the shutters 21 and 22 when the disc cartridge 311 is placed on the front side, and to prevent dust from adhering directly to the signal recording surface 100A when the disc cartridge 311 is placed on the reverse side.

In addition, in the disc cartridge 311, the shutter 22 is provided with an opening and closing operation portion for opening and closing the shutters 21 and 22, which is different from the disc cartridge 308 of the eighth embodiment. Specifically, as shown in FIGS. 51 and 57 , the opening and closing operation portion 22 t and the elastic portion 22 v are integrally formed with the locking protrusion 22 k formed by these, and the shutter 22 . Therefore, unlike the eighth embodiment, when viewed from the magnetic disk 100 side, the opening and closing operation portion 22t is located on the right side of the magnetic head opening portion 21h. The function and operation of the opening and closing operation portion 22t are the same as those of the disc cartridge 308 of the eighth embodiment.

(Example 12)

Next, the disc cartridge 312 according to the twelfth embodiment of the present invention will be described with reference to the drawings.

The disc cartridge 312 differs from the disc cartridge 311 of the eleventh embodiment in that a flange 12t is provided on the inner side surface 12i of the disc storage portion 10d and a protrusion 20w is provided around the holes 20h of the shutters 21 and 22 . Hereinafter, these features will be described.

As shown in FIG. 58, the flange 12t protrudes from the inner side surface 12i of the cartridge upper body 12 toward the inner periphery of the magnetic disk 100, and is formed on the entire outer periphery of the magnetic disk storage portion 10d. FIG. 59 shows a cross-section of the disc cartridge 312 when the magnetic disc 100 is installed in the disc storage unit 10d. When the shutters 21 and 22 are in the closed state, as shown in FIG. 59 , the outer peripheral portion of the signal recording surface 100A of the magnetic disk 100 is in contact with the flange 12t. As a result, the gap between the outer peripheral portion of the magnetic disk 100 and the cartridge main body is closed to prevent dust from entering the signal recording surface 100A side.

A gap 10w is provided between the flange 12t of the disc case main body 10 and the lower body 11 of the disc case. When the shutters 21 and 22 are opened, as shown in FIGS. Interference with the shutters 21,22.

As shown in FIG. 59, in such a structure, when the shutters 21, 22 are closed, a gap 10z leading to the outside is generated between the magnetic disk 100 and the shutters 21, 22. In order to close this gap 10z, protrusions 21w, 22w are provided in the vicinity of the disc center hole 100h of the shutters 21, 22. As shown in FIG. 58, when the shutters 21 and 22 are closed, the protrusions 21w and 22w are in close contact to form a protrusion 20w that completely closes the entire area around the disk center hole 100h. This prevents dust from entering the signal recording surface 100A of the magnetic disk 100 from the magnetic disk center hole 100h.

The front ends of the protrusions 21w and 22w may contact the signal recording surface 100A of the magnetic disk 100 . Therefore, it is preferable to round the corners of the protrusions 21w, 22w to prevent damage to the disk. In addition, the protrusions 21w, 22w may also be integrally formed with the shutters 21, 22. At this time, the portion of the projection 20w that is in contact with the magnetic disk 100 is preferably bonded with a non-woven fabric for preventing damage to the disk, ultrasonically welded, or formed with a coating for preventing damage. In addition, after the projections 21w and 22w are made of a non-woven fabric for preventing damage or a coating for preventing damage, they may be ultrasonically welded or fixed to the shutters 21 and 22 .

In addition, as clearly shown in FIG. 59, when the shutters 21 and 22 are in the closed state, the disk 100 is held on the shutters 21 and 22 in a state where the magnetic disk 100 is suspended from the shutters 21 and 22 by the gap 10z by means of the protrusion 20w, the flange 12t, and the like. That is, most of the signal recording surface 100A of the magnetic disk 100 is not in surface contact with the shutters 21 and 22 . Therefore, even if the shutters 21 and 22 are not treated with non-woven fabric for damage prevention, damage to the signal recording surface 100A can be prevented.

Figures 62 and 63 show a disk case with enlarged protrusions 21w' and 22w' in the peripheral direction of the magnetic disk 100, Figure 62 shows that the shutters 21, 22 are in a closed state, and Figure 63 shows that the shutters 21, 22 are in an open state .

As shown in Figures 62 and 63, the projections 21w' and 22w' are preferably located closer to the disk than the flange 12t of the disk storage part 10d when the shutters 21, 22 are in an open state. The center of the storage department. Thereby, the protrusions 21w' and 22w' can be prevented from contacting or interfering with the flange 12t.

The protrusions 21w' and 22w' may also be integrally formed with the shutters 21 and 22, respectively. At this time, the portions of the protrusions 21w' and 22w' that are in contact with the magnetic disk 100 are preferably bonded with a non-woven fabric for preventing damage to the disk, ultrasonically welded, or formed with a coating for preventing damage. It is also possible to ultrasonically weld or fix the protrusions 21w' and 22w' on the shutters 21, 22 after using non-woven fabric for damage prevention or coating for damage prevention.

(Example 13)

Next, a disk cartridge 313 according to a thirteenth embodiment of the present invention will be described with reference to the drawings.

First, with reference to Figs. 64 and 65, the general structure of the disc cartridge 313 will be described. In addition, like the eighth embodiment, the magnetic disk 100 shown in FIGS. 64 and 65 has a first surface and a second surface, and FIG. 64 shows the first surface on which a disk mark is usually recorded. The signal recording surface 100A of the second surface of the magnetic disk 100 is shown as the rear surface in FIG. 65 .

As shown in FIGS. 64 and 65 , the disc case 313 includes a disc case lower body 11 , a disc case upper body 12 , a pair of shutters 21 , 22 and a fall-off preventing member 23 .

As shown in FIG. 65 , the cartridge lower body 11 has a chucking opening 11c that is opened so that a chucking member such as a spindle motor that rotates the magnetic disk 100 from the outside can enter, and a signal recording surface 100A of the magnetic disk 100 for signal reproduction or recording. A magnetic head opening 11h that is opened for the magnetic head to enter and select. The cartridge lower body 11 faces the signal recording surface 100A of the magnetic disk 100 . In addition, the lower body 11 of the cartridge is molded from synthetic resin.

The head opening 11 reaches the side of the lower body 11 of the disk case. In order to prevent the rigidity of the lower body 11 of the disk case due to the head opening 11h, the lower body 11 of the disk case has a bridge portion 11b connecting the head opening 11h.

In addition, the back side of the lower body 11 of the disk cartridge is provided with two positioning matching holes 11w for inserting the positioning pins of the disk cartridge in the driving device.

In order to allow the disk 100 to be put in and taken out, the upper body 12 of the disk case has a circular head opening 12w opening in the entire projected area of the disk 100, so as to expose the upper surface of the disk. The upper body 12 of the disc case and the lower body 11 of the disc case are bonded or welded at the edges to form the main body 10 of the disc case. The upper body 12 of the disc case is also made of synthetic resin.

The first inner surface 11u of the lower body 11 of the disc case facing the signal recording surface 100A of the magnetic disc 100 and the substantially circular second inner side 12i constituting the disc opening 12w of the upper body 12 of the disc case constitute the disc storage portion for storing the magnetic disc 100 10d. In this way, the first inner surface 11u becomes the bottom of the magnetic disk storage portion 10d.

There is a gap for the disk 100 to rotate between the second inner surface 12i of the disk storage portion 10d and the disk 100 . In addition, a disk opening 12w is located above the disk storage portion 10d, and one surface of the disk 100 fixed to the disk storage portion 10d is exposed from the disk opening 12w.

A part of the fall-off preventing member 23 protrudes from the disk opening 12w and is detachably attached to the cartridge upper body 12 . As shown in FIGS. 64 and 65, in this embodiment, two fall-off preventing members 23 are provided. On the other hand, the cartridge upper body 12 is provided with a drop preventing portion 12s integrally formed with the cartridge upper body 12 and projecting from the disk opening portion 12w. The two fall-off preventing members 23 and the fall-off preventing portion 12s are arranged at equal intervals on the outer periphery of the disk opening 12w to prevent the disk 100 from falling off from the disk opening 12w. In addition, two convex-shaped disk joint portions 12s' are provided on a part of the fall-off preventing portion 12s. The height of this disk engaging portion 12s' is equal to the height of the disk engaging portion 23a of the fall-off prevention member 23 when viewed from the magnetic disk.

According to this structure, the stable posture of the magnetic disk 100 can be ensured even when the disk cartridge 313 is used in a vertical or inverted state. Therefore, when the disk cartridge 313 is inserted into the drive unit and used in a vertical or reversed state, it exerts its fall-off prevention function. In addition, it is also possible to detachably attach the drop preventing member 23 to the cartridge main body 10 . It is also possible to fix the fall-off preventing member 23 to the cartridge upper body 12 as long as the rotation or elevation of the disk 100 taken out from the cartridge main body 10 is restricted inside the disk storage portion 10d.

The shutters 21 and 22 are provided in the same plane between the signal recording surface 100A of the magnetic disk 100 and the inner surface 71u of the magnetic disk storage portion 10d. The shutters 21 and 22 have rotary holes 21u and 22u respectively, which are matched with a pair of rotary shafts 11s on the side opposite to the magnetic head opening 11h outside the disk storage portion 10d of the disc case main body 10, and rotary holes 81u, 82u. free turn. Therefore, the shutters 21 and 22 move around the rotary shaft 11s to open or close the chuck opening 11c and the head opening 11h to the outside.

The vicinity of the swing holes 21u and 22u of the shutters 21 and 22 are respectively provided with an annular portion 21c and a pin-shaped portion 22c. The annular portion 21c and the pin-shaped portion 22c have mutually meshing shapes, and constitute an interlocking mechanism 20c for opening and closing the shutters 21 and 22 in conjunction with each other. It is also possible that the linkage mechanism 20c is composed of other mechanisms that can be linked, such as a cam mechanism or a gear mechanism.

The surfaces of the shutters 21 and 22 facing the signal recording surface 100A of the magnetic disk are provided with protective layers 21p and 22p for preventing the magnetic disk 100 from being damaged or dust from entering the signal recording surface 100A.

For the protective layers 21p and 22p, an appropriate one can be selected from nonwoven fabrics for damage prevention, nonwoven fabrics for dust prevention, coatings for damage prevention, and coatings for dust prevention. In this embodiment, a thin plate made of dust-proof nonwoven fabric is used as the protective layers 21p, 22p by bonding or ultrasonic welding.

The lock protrusion 21k provided on the shutter 21 and the lock engagement part 22k provided on the shutter 22 cooperate therewith constitute a lock mechanism 20k for locking the shutter 21 and the shutter 22 to open and close. With such a structure, the opening and closing of the shutter 21 and the shutter 22 can be locked, and the operator can prevent the shutter from being easily opened. Thus, dust, fingerprints, and damage can be prevented from adhering to the signal recording surface 100 of the magnetic disk 100 . The lock protrusion 21k is integrally formed with the shutter 21 , and the lock fitting portion 22k is integrally formed with the shutter 22 .

In addition, the shutter 21 and the shutter 22 are provided with notches 21h and 22h. When the shutter 21 and the shutter 22 are in the closed state, the notches 21h and 22h engage with each other to form the hole 20h. When the shutters 21 and 22 are closed, the hole 20h is located at a position corresponding to the center hole 100h of the disk 100 , and the diameter of the hole 20h is approximately equal to the diameter of the center hole 100h of the disk 100 . Thus, when the disc cartridge 313 is placed forward, dust can be prevented from adhering to the shutters 21 and 22, and when the disc cartridge 313 is placed upside down, dust can be prevented from directly adhering to the signal recording surface 100 of the magnetic disk 100.

As described in Embodiment 8, etc., the disk circumferential dispersion shape on the shutters 21 and 22 is provided with: when the shutters are in a closed state, the disk holding members 21a, 21b, 22a, 22b that hold the disk are integrated with the shutters 21 and 22. . The parts of the disk holding members 21a, 21b, 22a, 22b that are in contact with the disk 100 are inverted tapered slopes. With these slopes, when the shutters 21, 22 are closed, the magnetic disk 100 is pressed against the shutters 21, 22 side and held securely.

In addition, in this embodiment, only the disk holding member 21b is not fixed to the shutter 21, but is connected by the elastic part 21d, and can move freely in the radial direction of the disk 100 (toward the center of the disk). Thus, even if the diameter or thickness of the mounted magnetic disk is uneven, the magnetic disk holding members 21a, 21b, 22a, 22b securely hold the magnetic disk 100 without loosening.

On the other side of the rotation hole 22u, that is, in the vicinity of the disk holding member 22a, a shutter opening and closing operation part 22t for opening and closing the shutter 22 is provided and integrally formed with the shutter 22. Therefore, when the shutters 21 and 22 are attached to the cartridge main body 10, the shutter opening and closing operation portion 22t is located inside the magnetic head opening 11h below the bridge portion 11b. When the shutters 21 and 22 are opened and closed, the opening and closing operation part 22t moves inside the magnetic head opening 11h along the bridge part 11b. Due to such an arrangement, it is not necessary to separately provide a space in the cartridge main body 10 for the movement of the opening and closing operation portion 22t. In other words, there is no need to provide extra space in the main body 10 of the disc cartridge, and dust can be prevented from entering the main body 10 of the disc cartridge. In addition, the opening and closing operation portion 22t can be arranged in the region inside the head opening of the cartridge main body 10, so that it is possible to provide a cartridge with good design.

As shown in FIG. 66 , the shutter 21 and the shutter 22 are not joined on a straight line but have a plurality of joining surfaces that are not on a straight line. Specifically, in the area of the clamping opening 11c, the shutter 21 and the shutter 22 respectively have 21f and 22f of the first joint surface, and in the area of the magnetic head opening 11h, the shutter 21 and the shutter 22 respectively have 21g and 22g of the second joint surface. . The joining surfaces 21f and 22f are joined on the center line of symmetry of the disc cartridge 313 in this embodiment. On the other hand, 21g and 22g of the joining surface are joined on a straight line deviated at a predetermined angle from the center line of symmetry, here, 15 to 16 degrees. Due to such a shape, the shutter 22 can be formed integrally near the shutter opening and closing operation portion 22t, and the rigidity of the shutter 22 can be sufficiently ensured.

The shutters 21 and 22 are biased in the closing direction of the shutters 21 and 22 by shutter springs 31 and 32 respectively provided in areas other than the disk housing 10d. The shutter springs 31 and 32 are respectively inserted into two spring posts 11t of the lower body 11 of the cartridge. In this embodiment, coil springs are used as the shutter springs 31 and 32 . By using the shutter springs 31 and 32 of the same shape, the cost can be reduced. Various elastic members such as compression springs, leaf springs, and resin springs can be used other than coil springs.

As shown in FIG. 65 , the disc cartridge 313 has a write protection member 40 . The write protection part 40 is slidably installed in the groove 11v of the lower body 11 of the disc case. By sliding the write protection part 40, the position of the protrusion 40t is moved, and the detection switch provided in the driving device is opened and closed according to the position of the protrusion 40t. Accordingly, recording on the magnetic disk 100 is prohibited or permitted.

The disc case 313 is composed of the disc case lower body 11 and the disc case upper body 12 , the fall-off prevention part 23 , the shutters 21 , 22 , the shutter springs 31 , 32 and the write protection part 40 .

When the disc cartridge lower body 11 and the disc cartridge upper body 12 are engaged, the two rotating shafts 11s of the disc cartridge lower body 11 fit into the two recesses 12h of the disc cartridge upper body 12 respectively. As a result, the rigidity of the rotating shaft 11s is improved, and even when the shutters 21 and 22 are in the open state, the twisting of the shutter rotating periphery due to the bias of the shutter spring can be reduced, and the opening amount of the shutter can be ensured.

On the upper surface of the disc case main body 10 (disc case upper body 12), there is a marking surface 10f that can record the content written by the installed magnetic disc 100, or an arrow or a concave portion that is marked in the direction (arrow 1A) of inserting the disc case 313 into the drive unit. 10a.

In addition, a pair of recesses 10c and 10e respectively provided on a pair of side surfaces parallel to the inserting direction 1A of the disc cartridge main body 10 can be used as a matching limit for drawing out when the disc cartridge 313 is loaded by the drive device or when the disc cartridge 313 is stored in the converter. Position recess or positioning recess. In addition, the slit 10b provided on one side of the cartridge main body can be used to detect the concave portion on the front and back sides when the cartridge 313 is inserted into the drive unit.

Next, the operation of the disk cartridge 313 will be described with reference to FIG. 66 showing the closed state of the shutter, FIG. 67 showing the open state of the shutter, FIG. 68 showing the detailed structure of the shutter locking portion, and FIG. 69 showing the detailed structure of the shutter disk holding member.

First, the storage state in which the disk cartridge 313 is not installed in the drive device will be described. At this time, the shutters 21 and 22 are in the closed state as shown in FIG. 66. As shown in FIG. The magnetic disk 100 is held and fixed to the cartridge main body 10 by bringing the signal recording surface 100A into surface contact with the thin plate 22p of the shutter 22 in the thickness direction 100t. Slopes 21a', 21b', 22b' are also formed in other disk holding members 21a, 21b, 22b, respectively, and the slope 22a' holds the disk 100 on the cartridge main body 10 in the same way.

In this state, since the signal recording surface 100A of the magnetic disk 100 is in close contact with the thin plates 21p and 22p, dust can be prevented from adhering to the signal recording surface 100A. In addition, by forcibly rotating one surface of the magnetic disk 100 from the outside or forcibly opening and closing the shutters 21 and 22, dirt such as dust and fingerprints adhering to the signal recording surface 100A of the magnetic disk 100 can be wiped off.

In addition, since the opening and closing of the shutters 21 and 22 are locked by the lock mechanism 20k, the operator cannot simply open the shutters 21 and 22 . Accordingly, the signal recording surface 100A of the magnetic disk 100 can be protected, and adhesion of dust, fingerprints, scratches, and the like can be prevented.

In addition, a hole 20h formed by the notches 21h, 22h of the shutters 21, 22 is provided in the area of the shutters 21 and 22 corresponding to the central hole 100h of the magnetic disk 100. Therefore, in the state where the disk cartridge 313 is placed, it is possible to prevent dust from entering through the center hole 100h and adhering to the shutters 21 and 22.

In addition, when the shutters 21 and 22 are in the closed state, among the joint surfaces of the shutters 21 and 22, as shown in FIGS. And 21g and 22g overlap in the thickness direction of the magnetic disk 100 . Thus, even in the case where the shutters 21 and 22 are not completely closed due to the uneven diameter of the magnetic disk 100, or the shutters 21 and 22 are not completely closed due to incomplete locking of the shutters 21 and 22, the shutters 21 and 22 are not fully closed. 22 will not produce gaps on the joint surface. Therefore, even in such a case, it is possible to reliably prevent dust, fingerprints, and damage from adhering to the magnetic disk 100 .

In addition, as shown in FIG. 70, the shutters 21 and 22 are joined at a position higher than the joint surface 21g of the shutter 21 around the magnetic head opening 11h. On the other hand, as shown in FIG. 71 , the shutters 21 and 22 are engaged around the locking opening 11 c, and the joint surface 21 f of the shutter 21 is positioned higher than the joint surface 22 f of the shutter 22 . In this way, it is also possible that the angles of the plurality of joint surfaces joined by the shutters 21 and 22 are different from each other. According to such a structure, the two shutters 21 and 22 are reliably fitted in the thickness direction of the magnetic disk, which can prevent the shutters 21 and 22 from floating, and also improve the rigidity of the joint surface of the shutters 21 and 22 when the shutters 21 and 22 are closed. .

In addition, in this embodiment, the shutters 21 and 22 have joint surfaces 21g, 22g, 21f, and 22g as shown in FIGS. The method shown in and 71 is also possible. For example, the bonding surfaces 21g, 22g shown in FIG. 70 may be arranged around the magnetic head opening 11h; the bonding surfaces 21f, 22f shown in FIG. 71 may also be arranged around the clamping opening 11c. In this way, the rigidity when the shutters 21 and 22 are in the closed state is improved, the gap between the joining surfaces can be reduced, and dust can be prevented from entering the inside of the disc case.

In addition, when the shutters 21 and 22 are in the closed state, the projections 21j, 22j provided on the shutters 21 and 22 shown in FIG. . Thus, the rotation of the shutters 21 and 22 is restricted without changing the closed state. Thereby, loosening of the shutter can be prevented, and damage caused by an operator's intentional use can be prevented. Also because the rotation of the shutters 21 and 22 is restricted, the position of the shutter opening and closing operation portion 22t does not change. Therefore, when the disk cartridge 313 is inserted into the drive device, the shutter opening and closing mechanism of the drive device is reliably engaged with the shutter opening and closing operation portion 22t.

Next, the state in which the disk cartridge 313 is installed in the drive unit will be described. As shown in Figure 66, if the disk cartridge 313 is inserted into the drive device in the direction of 1A, the disk cartridge positioning pins provided on the drive device will fit into the positioning holes 11w of the disk cartridge 313, and the horizontal direction and the horizontal direction of the disk cartridge 313 will be positioned in the drive device. position in the height direction.

Then, the shutter opening and closing member of the shutter opening and closing mechanism provided in the driving device is engaged with the shutter opening and closing operation part 22t shown in FIG. The holding portion 21y is pushed in the direction of 20A. Thereby, the lock protrusion part 21k and the lock fitting part 22k of the lock mechanism 20k are separated from each other, and the lock is released. In this state, the shutter opening and closing operation part 22t is simultaneously moved in the direction 20B by the shutter opening and closing member. As shown in FIG. 67 , the shutter 21 rotates around the rotation axis 11 s against the urging force of the shutter spring 31 . Along with this, the shutter 22 linked by the link mechanism 20 c also rotates against the urging force of the shutter spring 32 . Thus, if the shutter 21 is fully opened, the shutter 22 is also fully opened.

At this time, the locking protrusion 21k and the locking holding portion 21y return to their original shapes and positions by the locking elastic portion 21e. Thus, plastic deformation due to the locking elastic portion 21e made of resin does not occur. Thus, the signal recording surface 100A of the magnetic disk 100 is exposed to the outside through the chuck opening 11c and the head opening 11h. In addition, the magnetic disk 100 held by the disk holding members 21a, 21b, 22a, 22b is released from the held state by the rotation of the shutters 21 and 22, and becomes a rotatable state inside the disk storage portion 10d.

Next, the spindle motor of the driving device, the turntable, and the magnetic head enter the chuck opening 11c and the magnetic head opening 11h, respectively, and the recording or reproduction on the magnetic disk 100 becomes possible.

Like this, utilize protrusion from the outside, push locking protruding part 21k to the direction of arrow 20A, while canceling the engagement between lock fitting part 22k, push the shutter opening and closing operation part 22t to the direction of arrow 20B at the same time, just can use The shutters 21 and 22 rotate to open the clamping opening 11c and the head opening 11h to the outside, and at the same time, the holding of the magnetic disk 100 by the disk holding members 21a, 21b, 22a, 22b can be released. Therefore, it is possible to prevent the operator from simply opening the shutter or taking out the magnetic disk, and therefore, it is possible to prevent dust, fingerprints, and damage from adhering to the magnetic disk 100 .

Next, a state in which the disk cartridge 313 is ejected from the drive device will be described. When the pop-up mechanism of the driving device is activated, the shutter opening and closing member engaged with the shutter opening and closing operation portion 22t is separated from the shutter opening and closing operation portion 22t. Thus, the shutters 21 and 22 cannot be kept open, and the shutters 21 and 22 , which are urged in the closing direction by the shutter springs 31 and 32 , rotate in the closing direction. As a result, the shutters 21 and 22 close the head opening 11h and the chucking opening 11c. At this time, the opening and closing of the shutters 21 and 22 are locked by the lock mechanism 20k. In addition, the magnetic disk 100 is held by the magnetic disk holding members 21a, 21b, 22a, and 22b, and returns to the original state. In this state, the disc cartridge 313 is ejected from the drive unit.

In addition, as shown in FIG. 69, in the disc cartridge 313, the height of the disc engaging portion 23a of the drop preventing member 23 provided on the disc cartridge main body 10 is the same as the height of the disc engaging portion 12s' of the disc cartridge upper body 12. In addition, the slope portions 21a' (21b', 22a', 22b') of the disk holding members 21a (21b, 22a, 22b) of the shutters 21 and 22 are higher than the disk engaging portions 23a and 12s toward the upper side of the disk 100, that is, in the 100u direction. '. In this way, the magnetic disk 100 can be reliably held by the shutters 21 and 22 even when the disk cartridge 313 is used in a vertical or reversed state depending on the form of the driving device. For example, when the magnetic disk 100 is used in the reversed state, if the magnetic disk 100 is released from the clamped state, the magnetic disk 100 is engaged with the disk engaging portions 23a and 12s', and a stable horizontal state is maintained. If it is converted from this state to the closed state, the magnetic disk 100 is engaged on the inclined surface 21a' (21b', 22a', 22b'), smoothly slides over the inclined surface and enters, and is secured by the magnetic disk holding member 21a (21b, 22a, 22b). kept.

As described above, according to the disk cartridge of the present invention, the disk cartridge main body has the structure of the disk opening and covers only one surface of the disk. In addition, the method of providing the shutter opening/closing operation portion on the disc cartridge body eliminates the need to provide an unnecessary space on the disc cartridge body. Thus, dust can be prevented from entering the inside of the disc cartridge main body.

In addition, the two shutters are joined on the center line of the disk in the area of the chuck opening, and on a straight line deviated from the center line of the disk at a predetermined angle in the area of the head opening. In this way, the vicinity of the shutter opening and closing operation part can be integrated, and the rigidity of the shutter can be sufficiently ensured.

In addition, the operator cannot easily open the shutters because of the structure in which the two shutters are mutually locked to open and close. Prevents dust, fingerprints, and damage from adhering to the disk.

In addition, at least one of the plurality of disk holding members is not fixed to the shutter but is connected by an elastic portion, and is elastically deformed in the radial direction of the disk by the force of the shutter spring. In this way, even if the diameter of the installed disk is uneven, the disk can be reliably held without loosening.

(Example 14)

Next, a disc cartridge 314 according to Embodiment 14 of the present invention will be described with reference to FIGS. 72 to 81. FIG. The same components of the disc cartridge 314 of the present embodiment and the disc cartridge 313 of the thirteenth embodiment are given the same reference numerals.

The disc case 314 of the present embodiment is different from the disc case 313 of the embodiment 13 in the shape of the inner upper surface 12u of the disc case upper body 12 (FIG. 79) and the shape of the fall-off preventing member 53 (FIGS. 72, 77, 78). In addition, the disc cartridge 314 also has a disc receiving portion 60 (FIGS. 72 and 81). These differences of the disc cartridge 314 will be mainly described below.

In the disk cartridge 313 of the thirteenth embodiment, the heights of the disk holding members 21 a , 21 b , 22 a , and 22 b are equal on the outer periphery of the disk 100 . In contrast, in the disc cartridge 314 of this embodiment, as shown in FIGS. 73 and 79, protrusions are formed on a part of the disc holding members 21b, 22a, and 22b. In particular, the disk holding members 21b, 22a and 22b comprise protrusions respectively comprising a first area 121b, 122a, 122b having a first height h1 and comprising a second area 221b, 222a, 222b having a second height h2. On the other hand, the disk holding member 21a includes only the second region 221a having the second height h2.

The first height h1 is higher than the second height h2 and is approximately equal to the height of the disk holding members 21a, 21b, 22a, 22b of the disk cartridge 313 of Embodiment 13. That is, the disk holding members 21a, 21b, 22a, 22b of this embodiment are lower than the disk holding members 21a, 21b, 22a, 22b of the disk cartridge 313 of Embodiment 13 except for the first regions 121b, 122a, 122b. .

In addition, as shown in FIGS. 74 and 75, the upper surface of the first region 122a of the disk holding member 21a is provided with a disk-side higher step 223 along the outer periphery of the disk. The upper surface of the first region 121b of the disk holding member 21b and the first region 122b of the disk holding member 22b also have the same level difference.

The first regions 121b, 122a, and 122b are regions that contact the disk first among the disk holding members 21b, 22a, and 22b when the shutters 21 and 22 are closed, thereby contacting the disk 100 a little earlier than the second regions 221b, 222a, 222b.

The disk holding members 21a, 21b, 22a, 22b move as the shutters 21 and 22 are closed. 77 and 78 clearly show the positions of the disk holding members 21a, 21b, 22a, 22b in the closed state and open state of the shutters 21 and 22. In addition, FIGS. 79 and 80 show cross-sectional views of the B-B and C-C cross-sections shown in FIG. 78 .

As shown in FIGS. 77 to 79, in the inner upper surface 12u of the disc cartridge upper body 12, when the shutters 21 and 22 are opened and closed, the first areas 121b, 122a, 122b of the disc holding members 21b, 22a, 22b pass through the area 12y. , 12x, 12z are recessed. On the other hand, the regions 12y', 12x', 12z' passing through the second regions 221b, 222a, 222b are not recessed. Therefore, the thickness of the regions 12y, 12x, 12z of the upper body 12 of the disc cartridge is thinner than that of the regions 12y', 12x', 12z' or other parts.

As shown in FIGS. 76 to 79 , the front end of the first region 122 a is located above the lower surface of the drop-off preventing member 53 . In addition, the front end portion 122a of the disk holding member 22a enters the recessed portion of the area 12x provided on the inner upper surface 12u of the cartridge upper body 12, and the recessed portion of the area 12x receives the front end portion of the first area 122a. In the front end portion of the first region 122a, only a part of the first region 122a is joined to the inner upper surface 12u due to the step 223 . The second area 222a is not in contact with the inner upper surface 12u of the cartridge upper body 12 .

In order to make the shutters 21 and 22 open and close smoothly, it is preferable that the friction caused by the contact between the front end portion of the first region 122a of the disk holding member 22a and the inner upper surface 12u of the cartridge upper body 12 is small. Therefore, the front end portion of the first region 122a of the disk holding member 22a is formed in a convex shape that is a part of an arc along the radial section of the disk 100 . The step 223 is provided to supplement the lack of strength caused by the sharp front end and to improve the molding accuracy and ease of molding.

As shown in FIG. 80 , in the disk holding member 22b, the front end portion of the first region 122b is also located above the lower surface of the drop-off preventing member 53 . In addition, the front end portion of the first area 122b enters the recessed portion of the area 12z provided on the inner upper surface 12u of the cartridge upper body 12, and the recessed portion of the area 12z receives the front end portion of the first area 122b. Although not shown in the figure, in the disk holding member 21b, the front end portion of the first area 121b is also located above the lower surface of the drop preventing member 53, and enters the concave portion of the inner upper surface 12u area 12y of the upper body 12 of the cartridge.

Like this, make the inner side upper surface 12u region 12x, 12y and 12z of disc cartridge upper body 12 recess, and make a part of disk holding member enter the method for its recess, reduce the thickness of disc case 314, its reduction amount is equivalent to region 12x, 12y. and a recess depth of 12z.

According to such a structure, even when the disk cartridge is used vertically or upside down, the opening portion is clamped to open the disk 100 and the shutters 21 and 22 are closed, and the inclined portion 122a' of the first region 122a of the disk holding member 22a is reliably engaged in the disk 100. Disk 100. It then slides smoothly into beveled portion 122a' to also securely engage beveled portion 222a' of second region 222a of disk retaining member 22a (FIG. 74). At this time, the inclined portion 221 a ′ of the second region 221 a of the disk holding member 21 a not provided with protrusions is also engaged with the disk 100 . As a result, the magnetic disk holding members 21a and 22a cooperatively hold the magnetic disk 100 . The magnetic disk holding members 21b and 22b also operate in the same manner to hold the magnetic disk 100 . Therefore, even if the thickness of the disc cartridge is reduced, the shutter can be reliably closed and the disc can be reliably held in all postures.

In addition, if the shape of the disk holding member is the same as that of Embodiment 1, if the thickness of the entire disk cartridge is to be thinned, then as shown in FIG. Areas 12x, 12x', 12y, 12y', 12z and 12z' through which all of the parts 22a, 21b, 22b pass. At this time, the upper body 12 of the disc cartridge becomes thinner over a relatively large area, which reduces the overall strength of the disc cartridge. On the other hand, according to the disc cartridge 314, the thickness-reduced regions 12y, 12x, and 12z are narrow, and the thickness of the disc cartridge can be reduced without affecting the overall strength of the disc cartridge.

In this embodiment, three of the four disk holding parts are provided with protrusions to form the first area, but an appropriate number can be selected according to the number of disk holding parts or the shape of the shutter.

Another point in which the disc cartridge 314 of this embodiment is different from the disc cartridge 313 of the thirteenth embodiment is the structure of the drop preventing member 53 .

As shown in FIG. 72, the fall-off preventing member 53 has a shape in which a part of the disc is cut away. Tangent to the disk opening 12w of the upper body 12 of the disk case, a notch 54 is provided at a position corresponding to the fall-off preventing component 53, and the fall-off preventing component 53 fits on the notch 54 and can rotate. As shown in FIG. 77, the fall-off preventing member 53 is rotated so that a part of the fall-off preventing member 53 protrudes from the disk opening 12w of the memory upper body 12 and is held. In addition, as shown in FIG. 78, by storing the anti-drop preventing member 53 in the upper body of the disc cartridge, it is also possible to keep the protruding part of the anti-drop preventing member 53 not in the disk opening 12w. If when falling off preventing part 53 from notch 54 to become a problem, it is just passable to set the protrusion and concave that cooperates on the memory upper body 12 side that comes off preventing part 53 side and breach 54 to be arranged.

According to such a structure, the thickness of the fall-off prevention member 53 can be made to approximate to the position where the upper surface of the memory upper body 12 is reached, so that the thickness of the entire disc cartridge 314 can be reduced.

In the disk case 314 of this embodiment, as shown in Figures 72, 77, 78 and 81, another feature is that the bottom inner circumference of the disk storage part formed by the inner lower surface 11u and the inner side surface 11i of the lower body of the disk case is provided Disk accepting part 60. The disk receiving portion 60 has an upper surface 60a parallel to the inner lower surface 11u of the cartridge lower body.

When the shutters 21 and 22 are closed and the magnetic disk 100 is held by the magnetic disk holding member, the vicinity of the outer periphery of the signal recording surface 100A of the magnetic disk 100 is in contact with the upper surface 60a of the magnetic disk receiving portion 60 . Thus, it is possible to prevent dust from adhering to the signal recording surface 100A of the magnetic disk 100 or to prevent dust from accumulating on the inner lower surface 11 of the cartridge lower body.

The shape of the disk receiving portion 60 may also be different from that shown in FIG. 81 . For example, as shown in FIG. 82, an inverted tapered disk receiving portion 76 may be provided in which the inner lower surface 11u of the lower body of the cartridge meets the inner side surface 11i. At this time, the shutters 21 and 22 are closed, and when the magnetic disk 100 is held by the magnetic disk holding member, the outer periphery of the signal recording surface 100A of the magnetic disk 100 is in tangential contact with the magnetic disk receiving portion 76 .

(Example 15)

Next, a disk cartridge 315 according to Embodiment 15 of the present invention will be described with reference to FIGS. 83 to 87. FIG. The same components of the disc cartridge 315 of this embodiment and the disc cartridge 314 of the fourteenth embodiment are assigned the same reference numerals.

As shown in FIG. 83 , the disc case 315 differs from the disc case 314 in that the inner side lower surface 11u of the lower body 11 of the disc case is in contact with the shutters 21 and 22, and the shutters 21 and 22 are provided on the lower surfaces 21v and 22v. There are four types of recesses 85, 86, 87, 88a-88c. The depths of these recesses are described in order. In addition, when holding a 12 cm magnetic disk, the depth of the concave portion is about 0.1 mm to 0.3 mm.

As is clear from FIG. 84 showing the shutters 21 and 22 in the closed state and FIG. 85 in the open state, first, when the shutters 21 and 22 are opened and closed, the disks engaged by the disk holding members 21a, 21b, 22a, and 22b of the shutters 21 and 22 are A first concave portion 86 is provided in the region of the inner lower surface 11u of the case lower body 11 .

The cartridge upper body 12 and the cartridge lower body 11 sandwich the disk holding members 21a, 21b, 22a, and 22b almost without gaps. When assembling the disc case 315, due to the non-uniform dimensions of the components that make up the disc case 315, the disk holding members 21a, 21b, 22a and 22b may be in too tight contact with the disc case upper body 12 and the disc case lower body 11. Like this, increase the friction between disk holding member 21a, 21b, 22a and 22b and disc case upper body 12 or disc case lower body 11, the opening and closing action of shutter 21 and 22 is unstable or produces dust because of friction.

Utilize the method for arranging the first concave portion 86, the disk holding member 21a, 21b, 22a and 22b form the gap below, can reduce such friction, make the opening and closing action of shutter 21 and 22 stable, can reduce the dust that produces due to friction.

The second concave portion 87 is provided in the area where the outer shape edges of the shutters 21 and 22 are located when the shutters 21 and 22 are in the closed state. As shown in FIGS. 84 and 86, the second concave portion 87 is preferably provided across the outer and inner sides of a line including the inner lower surface 11u of the cartridge lower body 11 corresponding to the outer edge portions of the shutters 21 and 22.

Since the disk case 315 accommodates the disk so that one surface is exposed, the disk 100 can be pressed in the direction indicated by the arrow A as shown in FIG. 86 . In order to protect the signal recording surface 100A of the magnetic disk 100, non-woven fabrics 21s and 22s are provided, but they are not completely pasted to the outer edges of the shutters 21 and 22. Therefore, if the magnetic disk 100 is pressed in the direction indicated by the arrow A, the outer edges of the shutters 21 and 22 will come into contact with the signal recording surface 100A of the magnetic disk 100, which may damage the signal recording surface 100A.

However, by providing the second concave portion 87 , the outer shape edge portions of the shutters 21 and 22 may be deformed so that a part thereof enters the second concave portion 87 . Thereby, the pressing force is distributed, and the outer edge portions of the shutters 21 and 22 can be prevented from coming into too tight contact with the signal recording surface 100A of the magnetic disk 100 .

The third recess includes the third recess 88a provided on the inner lower surface 11u surrounding the clamping opening 11c and the magnetic head opening 11h, and the inner lower surface 11u that does not overlap the shutters 21 and 22 when the shutters 21 and 22 are in the closed state. The third concave portion 88b provided on the area, and the third concave portion 88c provided on the area of the inner lower surface 11u that does not overlap with the shutters 21 and 22 when the shutters 21 and 22 are in the closed state. The third concave portion 88b and the third concave portion 88c are arranged along an arc on the inner surface of the disk storage portion. In addition, in this embodiment, three third recesses 88a are provided.

The disk case 315 is equipped with various structures such as a disk receiving portion to prevent dust from entering the inside of the disk case or from adhering to the signal recording surface. However, it is difficult to completely prevent dust from entering.

The third recess just plays the role of storing these dusts that enter the inside of the disc case 315 . Specifically, as the shutters 21 and 22 are opened and closed, dust moves to these third recesses. Once the dust enters the third recess, the dust does not contact the shutters 21 and 22, does not leave the third recess, and remains in the third recess. Thus, the method of storing the dust in the third concave portion can reduce malfunction of the shutter due to dust or generation of dust due to friction.

In addition, such an effect can also be obtained in the first concave portion 86 and the second concave portion 87 . Therefore, it is not necessary to provide all of the first recessed portion 86, the second recessed portion 87, and the third recessed portion 88a, 88b, 88c, but only one of them can reduce the malfunction of the shutter caused by dust or the dust generated by friction. .

In addition, in the lower surfaces 21v and 22v of the shutters 21 and 22, along the edge It is also possible to set the concave portion 85 at the top. At this time, as shown in FIG. 84, when the shutters 21 and 22 are in the closed state, it is preferable that the recessed portion 85 is provided closer to the center of the cartridge than the second recessed portion 87. In addition, as shown in FIG. 86, the recesses 85 of the shutters 21, 22 and the second recess 87 of the inner lower surface 11u of the cartridge lower body 11 are preferably not connected when the shutters 21 and 22 are closed.

By providing the concave portion 85, the outer shape edge portions of the shutters 21 and 22 are made easier to deform. Therefore, even if a force in the direction of the arrow A is applied to the magnetic disk 100, the strong contact of the external edge portions of the shutters 21 and 22 with the signal recording surface 100A can be reduced, and the possibility of damage to the signal recording surface 100A can be reduced more effectively. Also, by welding or bonding non-woven fabrics inside the recesses 86, 87, 88a, 88b, 88c, the gaps in the main body of the cartridge can be closed, and dust can be strongly prevented from entering from the outside.

In this embodiment, the case where various recesses are provided in the disc cartridge 314 of the fourteenth embodiment is described, however, these recesses may be provided in the disc cartridges of the eighth to thirteenth embodiments.

(Example 16)

Next, a disk cartridge 316 according to a sixteenth embodiment of the present invention will be described with reference to FIGS. 88-93. The components of the disc cartridge 316 of this embodiment that are the same as those of the disc cartridge 313 of the thirteenth embodiment are assigned the same reference numerals.

As shown in FIG. 88, the disk cartridge 316 of this embodiment has a first opening and closing operation portion 22t on the first side 10p of the disk cartridge body approximately perpendicular to the disk insertion direction 1A, and a second opening and closing operation portion on the second side 10q. 93. Among them, the first opening and closing operation part 22t has the opening and closing operation part 22t having the same structure as that of the disk cartridge of the thirteenth embodiment.

As shown in FIG. 89, the second opening and closing operation portion 93 has a gear shape and has a hole into which the rotary shaft 11q of the cartridge lower body 11 can be inserted. There is an opening 11r on the side of the lower body 11 of the disc cartridge, so that when the second opening and closing operation part 93 is inserted into the rotating shaft 11q, a part of it can be exposed on the second side 10q of the main body 10 of the disc cartridge. The rotary shaft 11q may also be provided on the upper body 12 of the disc cartridge.

Among the two shutters 21 and 22 that open or close the magnetic head opening 11h and the clamping opening 11c of the cartridge lower body 11, the shutter 22 as a first shutter member has a first opening and closing operation portion 22t integrally formed thereon. On the other hand, a central gear 21m engaged with the second opening and closing operation portion 93 is provided near the disk holding member 21b on the outer surface of the shutter 21 as the second shutter member. The center of the central gear 21m coincides with the rotation hole 21u of the shutter 21 . In addition, a concave portion 21n is provided adjacent to the center gear 21m. The concave portion 21n forms a space in which the gear-shaped second opening and closing operation portion 93 can fit into the center gear 21m.

In order to open and close the shutters 21 and 22 using the first opening and closing operation part 22t, as shown in FIG. Then, as indicated by arrow 22W, the first opening and closing operation portion 22t is slid along the first side surface 10p of the cartridge. Thus, as shown in FIG. 91, the movement of opening and closing the shutter 22 is transmitted to the shutter 21 through the linkage mechanism 20c, and the shutters 21 and 22 cooperate to open the magnetic head opening 11h and the chucking opening 11c.

On the other hand, in order to open and close the shutters 21 and 22 using the second opening/closing operation portion 93, as shown in FIG. 90, first, the engaged state of the lock mechanism 20k is released. Then, the second opening and closing operation part 93 is rotated as indicated by the arrow 93A. In this way, the gears of the second opening/closing operation part 93 engage, and the center gear 21m starts to rotate about the rotation hole 21u. This movement becomes the opening action of the shutter 21 . The movement of the shutter 21 is transmitted to the shutter 22 through the linkage mechanism 20c, and the shutters 21 and 22 cooperate to open the magnetic head opening 11h and clamp the opening 11c. As shown in FIG. 91 , when the shutters 21 and 22 fully open the head opening 11 h and the chuck opening 11 c , a part of the second opening and closing operation portion 93 enters the recess 21 n provided in the shutter 21 .

When closing the shutters 21 and 22, the first opening and closing operation part 22t may be slid in the reverse direction or the second opening and closing operation part 93 may be rotated in the reverse direction 93A. In this embodiment, since the shutter springs 31 and 32 acting in the closing direction of the shutters 21 and 22 are provided, if the first opening and closing operation part 22t and the second opening and closing operation part 93 are not applied to overcome the shutter springs 31 and 32 The shutters 21 and 22 are closed by themselves even if the force to open the shutters or the force to maintain the open state is not performed.

In the disc cartridge 316 of this embodiment, the opening and closing operation parts of the shutters 21 and 22 are provided on both surfaces perpendicular to the insertion direction and surfaces parallel to it. Therefore, even if the opening and closing operation part corresponding to the shutter is only arranged on the disc cartridge on the side perpendicular to the disc cartridge insertion direction, even if the opening and closing operation part corresponding to the shutter is only arranged on the side parallel to the disc cartridge insertion direction. The disk drive unit of the disk cartridge on the side can perform signal recording/reproduction with the disk cartridge of this embodiment.

In addition, according to the disk cartridge 316 of this embodiment, the second opening and closing operation portion 93 on the side parallel to the insertion direction of the disk cartridge 316 has a gear shape. Therefore, the shutter opening and closing mechanism provided on the magnetic disk drive device can also be formed in cooperation with various gears of the second opening and closing operation part 93, so that the shutters 21 and 22 can be reliably opened and closed with a simple structure.

In addition, in the above-described embodiment, the center gear 21m is provided near the disk holding member 21b. This position is provided because the distance from the central gear 21m to the swing hole 21u of the shutter 21 can be reduced, and the length of the central gear 21m necessary to fully open the shutter 21 can be shortened. However, the position of the central gear 21m is not limited to this position. As shown in Figures 92 and 93, it is also possible to set the central gear 21m so that the center of the magnetic disk is approximately located on the extension line of the arc of the central gear 21m, and to set the second opening and closing operation part 93 to cooperate with the central gear 21m. If the second opening/closing operation part 93 is provided at this position, the length of the central gear 21m required to fully open the shutter 21 becomes longer, but the distance from the turning hole 21u also becomes longer. This corresponds to increasing the distance between the fulcrum and the action point, and the shutter 21 and the shutter 22 can be opened and closed by rotating the second opening and closing operation part 93 with a small force.

(Example 17)

Next, a disk cartridge 317 according to a seventeenth embodiment of the present invention will be described with reference to FIGS. 94-97. The components of the disc cartridge 317 of this embodiment that are the same as those of the disc cartridge 316 of the sixteenth embodiment are assigned the same reference numerals.

As shown in FIG. 94, in the disk cartridge 317 of this embodiment, the second opening and closing operation portion 94 of the second side surface 10q is used instead of the second opening and closing operation portion 93 of the disk cartridge 316 of the sixteenth embodiment.

As clearly shown in FIG. 95, the second opening and closing operation portion 94 is a member slidable along the opening 11r provided on the side surface of the cartridge lower body 11, and is bent at its middle. In addition, a protrusion 94 a is provided at an end of the second opening and closing operation portion 94 , and this protrusion 94 a fits into a groove 21 i in the vicinity of the disk holding member 21 b of the shutter 21 .

96 and 97 show the shutters 21 and 22 of the disc cartridge 317 in a closed state and in an open state, respectively. The method of sliding the first opening and closing operation part 22t in the direction of the arrow 22w or the opposite direction to open and close the shutters 21 and 22 is the same as that described in the thirteenth and sixteenth embodiments.

In order to open and close the shutters 21 and 22 by the second opening and closing operation part 94, as shown in FIG. 96, first, the engaged state of the locking mechanism 20k is released. Then, the second opening and closing operation part 94 is slid in the direction indicated by the arrow 94B. Due to this movement, a force is applied to move the projection 94a of the second opening/closing operation portion 94 in the direction indicated by the arrow 94B. As a result, the shutter 21 opens around the pivot hole 21u. The movement of the shutter 21 is transmitted to the shutter 22 through the linkage mechanism 20c, and the shutters 21 and 22 cooperate to open the magnetic head opening 11h and clamp the opening 11c. The method of sliding the second opening and closing operation part 94 in the direction opposite to the arrow 94B makes the shutters 21 and 22 in the closed state or the effect of the force of the shutter springs 31 and 32 is the same as in the sixteenth embodiment.

The disc case of the present embodiment is the same as the disc case of embodiment 16, even if the opening and closing operation part corresponding to the shutter is only arranged on the disc drive device of the disc case on the side perpendicular to the direction of insertion of the disc case, even if it is corresponding to the opening and closing of the shutter The closing operation portion is provided only on the disc drive unit of the disc cartridge on the side parallel to the inserting direction of the disc cartridge, and signal recording/reproduction can be performed on the magnetic disc housed in the disc cartridge of this embodiment.

In addition, as shown in FIGS. 96 and 97, the operating direction (94B) of the second opening and closing operating portion 94 for opening the shutters 21 and 22 is opposite to and parallel to the inserting direction (1A) of the disc cartridge. Therefore, if the disk drive unit is provided with a protrusion that cooperates with the second opening and closing operation portion 94, when the disk cartridge of this embodiment is inserted into the disk drive device, the protrusion is engaged with the second opening and closing operation portion 94, and is linked to the second opening and closing operation portion 94. The insertion of the cartridge opens the shutters 21 and 22 of the cartridge. Therefore, the shutter opening and closing mechanism provided on the magnetic disk drive unit can be simplified.

(Example 18)

Next, a disk cartridge 318 according to an eighteenth embodiment of the present invention will be described with reference to FIGS. 98-101. The components of the disc cartridge 318 of this embodiment that are the same as those of the disc cartridge 316 of the sixteenth embodiment are given the same reference numerals.

As shown in FIG. 98, in the disk cartridge 318 of this embodiment, the second opening and closing operation portion 96 having 10q on the second side surface is used instead of the second opening and closing operation portion 93 of the disk cartridge 316 of the sixteenth embodiment.

As shown in FIG. 99 , the second opening and closing operation portion 96 is a belt-shaped member connected to the disk holding member 21 a of the shutter 21 . A protrusion 96a is provided on the end of the belt-shaped member, and the protrusion 96a can slide along the opening 11r provided on the side surface of the lower body 11 of the disc cartridge. The second opening and closing operation part 96 may be integrally formed with the shutter 21 .

100 and 101 show the disc cartridge 318 when the shutters 21 and 22 are in the closed state and in the open state, respectively. The method of sliding the first opening and closing operation part 22t in the direction of the arrow 22w or the opposite direction to open and close the shutters 21 and 22 is the same as that described in the sixteenth and seventeenth embodiments.

In order to open and close the shutters 21 and 22 using the second opening/closing operation portion 94, as shown in FIG. 100, first, the engaged state of the lock mechanism 20k is released. Then, the protrusion 96a of the second opening and closing operation part 96 is slid in the direction indicated by the arrow 96B. Due to this action, a force is applied to the shutter 21 in which the front end portion of the shutter 21 is pulled in the direction indicated by the arrow 96C around the pivot hole 21u. The movement of the shutter 21 is transmitted to the shutter 22 through the linkage mechanism 20c, and the shutters 21 and 22 cooperate to open the magnetic head opening 11h and clamp the opening 11c. When the shutters 21 and 22 are closed, the opposite action is performed.

The disc case of the present embodiment is the same as the disc case of embodiment 16, even if the opening and closing operation part corresponding to the shutter is only arranged on the disc drive device of the disc case on the side perpendicular to the direction of insertion of the disc case, even if it is corresponding to the opening and closing of the shutter The closing operation portion is provided only on the disc drive unit of the disc cartridge on the side parallel to the inserting direction of the disc cartridge, and the disc cartridge of this embodiment can perform signal recording/reproduction).

In addition, if the shutter 21 and the second opening/closing operation portion 96 are integrally formed, the number of parts constituting the disc cartridge can be reduced. Thus, the manufacturing cost of the disc cartridge can be reduced and the manufacturing process can be simplified.

In the sixteenth to eighteenth embodiments, the second opening and closing operation part is provided on the left side in the insertion direction of the disk cartridge. However, the position where the second switch operation part is provided is not limited to the position described in the above-mentioned embodiment. For example, it may be provided on the right side of the insertion direction (10r shown in FIG. 88). Alternatively, the second opening and closing operation part may be provided on the back side of the disk case (10t shown in FIG. 88). In this case, if it is the strip-shaped second opening and closing operation part 96 described in the eighteenth embodiment, there is no need to make much modification, and the second opening and closing operation part can be provided on the back of the disc cartridge.

(Example 19)

Next, a disk cartridge 319 according to a nineteenth embodiment of the present invention will be described with reference to FIGS. 102 and 103. FIG. Components of the disk cartridge 319 of the present embodiment that are the same as those of the disk cartridge 313 of the thirteenth embodiment are given the same reference numerals.

The characteristic point of the disk cartridge 319 of this embodiment is that rotation preventing members 97 are provided on the disk holding members 21b, 22a, and 22b, respectively. In addition, recesses 89 are provided to facilitate ultrasonic welding of the non-woven fabric on the shutters 21 and 22 .

Specifically, holes 21q, 22r, and 22q are provided in the disk holding members 21b, 22a, and 22b, respectively, and rotation preventing members 97 are incorporated in the respective holes 21q, 22q, and 22r. As shown in Figure 103, on the disk holding part 21b, (22a, 22b), the rotation preventing member 97 protrudes from a part of the respective slope 21b' (22a', 22b'), and the disk 100 is formed by the disk holding part 21a. , 21b, 22a, 22b hold the magnetic disk 100, the rotation preventing member 97 is in contact with the outer periphery of the magnetic disk 100. The anti-rotation member 97 is preferably made of a material having elasticity and a high coefficient of friction, for example, the anti-rotation member 97 made of rubber is preferably used.

In addition, if the rotation prevention member 97 is provided on one of the disk holding members 21a, 21b, 22a, and 22b, the rotation prevention effect can be exerted. However, in order to more reliably prevent the rotation of the magnetic disk 100, it is preferable to provide three rotation preventing members 97 as shown in the figure.

According to such a structure, when the magnetic disk 100 is held by the magnetic disk holding members 21a, 21b, 22a, 22b, and the operator intends to rotate the magnetic disk 100 intentionally, due to the effect of the rotation prevention member 97 contacting the magnetic disk 100, the small force cannot rotate the magnetic disk. 100. Therefore, the operator cannot rotate the magnetic disk 100 even if he intends to rotate the magnetic disk 100 while holding the magnetic disk 100 on the shutters 21 and 22 intentionally. Thus, when hard dust adheres to the nonwoven fabrics provided on the shutters 21 and 22, it is possible to prevent damage to the magnetic disk due to the operation of the operator.

In addition, by providing the rotation prevention member 97, it is also possible to prevent the magnetic disk 100 from loosening in the magnetic disk housing.

As shown in Fig. 102, the shutters 21 and 22 are provided with concave portions 89 on the contact surface with the signal recording surface of the magnetic disk 100 for ultrasonic welding of the nonwoven fabric. The concave portion 89 is provided in FIG. 102 so as to surround the periphery of the contact portion between the shutters 21 and 22 and the signal recording surface. In addition, it is also provided in the inner region of the concave portion 89 surrounding the outer periphery. The formation area of the recessed portion 89 is not limited to the shape shown in FIG. 102 , and any shape can be used as long as the nonwoven fabric can be reliably pasted on the shutters 21 and 22 . In this recess 89 the nonwoven is ultrasonically fused to the shutters 21 and 22 . With the method of providing the concave portion 89, even if the hardened portion of the nonwoven fabric due to ultrasonic welding or the resin material constituting the shutters 21 and 22 protrude from the nonwoven fabric, the hardened portion or the protruding portion is accommodated inside the concave portion 89. , which prevents contact on the disk. Thus, damage to the magnetic disk can be prevented. This concave portion 89 is preferably provided on the shutter when the non-woven fabric is adhered in the above-mentioned Examples 1 to 18.

In the above-mentioned Examples 1 to 19, the case where a method such as ultrasonic welding of non-woven fabrics is pasted on the shutter is described. However, the method of forming a tough hard coating on the signal recording surface of the magnetic disk is less susceptible to damage to the magnetic disk. When the structure is damaged, it is not necessary to provide a non-woven fabric, and the shutter can directly contact the disk, which is also possible. In addition, the entire shutter does not need to be in contact with the signal recording surface of the magnetic disk, and the shutter may have a structure in which a part of the shutter contacts the signal recording surface of the magnetic disk. That is, a structure in which not the entire surface of the magnetic disk but a part of the magnetic disk is in contact with the signal recording surface of the magnetic disk is also possible. In addition, it is also possible to provide a damage prevention structure such as sticking non-woven fabric on the contact portion.

In the first to nineteenth embodiments, the magnetic disk 100 housed in the cartridge has only one signal recording surface. The disk cartridge of the present invention has a structure in which one surface of the magnetic disk is exposed to the outside. As an example of a magnetic disk most suitable for such a structure, a magnetic disk having a signal recording surface on one side is taken as an example. For example, even a magnetic disk having two signal recording surfaces can be mounted in the disk cartridge of the present invention, loaded in a drive unit, and can record or reproduce signals. However, when a magnetic disk having two signal recording surfaces is mounted in the disc case of the present invention and stored, dust may adhere to the exposed signal recording surface. Therefore, it is preferable to provide some mechanism to prevent dust from adhering.

In addition, in the first to nineteenth embodiments, although the size of the magnetic disk 100 is not mentioned, a 12cm magnetic disk or magnetic disks of various other sizes can be accommodated in the disk case of the present invention.

In addition, in the first to nineteenth embodiments, the outer shape of the disk cartridge is shown slightly larger than the size of the magnetic disk, but the size relationship between the magnetic disk and the disk cartridge is not limited to the relationship shown in the drawings. For example, the outer shape of the disk case is the size that can install the disk of 12cm, but the disk storage portion or the disk holding part that is located in the disk case can be suitable for the structure that the disk of 8cm is installed, also possible. Such a disc cartridge functions as a recording/reproducing unit for recording/reproducing a 12 cm magnetic disk.

The features respectively described in Embodiment 1 to Embodiment 19 can be implemented in combination as appropriate. For example, the rotation preventing member described in the nineteenth embodiment may be provided in the disk cartridge of the sixteenth embodiment. Also, various recesses for collecting dust described in the fifteenth embodiment may be provided in the fifteenth embodiment. Thus, there are many combinations of the embodiments 1 to 19, and it is impossible to enumerate all possible combinations of the embodiments. However, those skilled in the art can combine various embodiments according to the description of the present invention, and those various possible embodiments also belong to the scope of the present invention.

Industrial Utilization Possibility

The disc case according to the present invention is particularly suitable for housing a magnetic disc having one recording surface. The disc cartridge body has a structure in which only the signal recording surface of the magnetic disk is covered and one surface is exposed, so that the thickness of the disc cartridge can be reduced. In addition, making the shutter have a shape that covers only one side of the disc cartridge can simplify its structure and reduce the manufacturing cost of the shutter. In addition, the disk holding member or the disk holding member presses and holds the disk against the shutter or the cartridge body, thereby preventing loosening of the disk in the cartridge body and preventing dust from adhering to the signal recording surface of the disk. Designability can also be optimized by utilizing the marking surface of the magnetic disk exposed at the opening of the magnetic disk.

Therefore, according to the present invention, it is possible to provide a disc cartridge that is thin, has high dust resistance, is superior in design, and can be used in various drive devices.

Claims (7)

1, a kind of tray salver comprises: tray salver main body and shutter; It is characterized in that, described tray salver main body comprises: have disk peristome and bottom, and may state make first of described disk can be located at the chucking peristome bottom the described disk storage portion with exposing outside to the disk storage portion of harvesting, in order to tighten described disk from the outside and the magnetic head that described disk second face carries out at least one side of signal regeneration or these two kinds of actions of signal record is used to choose and be located at the magnetic head peristome of the bottom of described disk storage portion from described disk peristome in the disk rotation with first and second;

Described shutter supports movably with respect to described tray salver main body between second of described disk and described disk storage portion bottom, so that opening or close described chucking peristome and described magnetic head peristome;

Described shutter have described shutter be in the center pit that protrudes from described disk when closing, be located at the projection on the described shutter, because the opening or the closing motion of described shutter, the contact on one side of described projection is at second of described disk, and lift described disk on one side to the tray salver thickness direction.

2, tray salver according to claim 1 is characterized in that: described projection is selected a kind of from spherical shape, cone shape, annular shape or a plurality of ball shape.

3, tray salver according to claim 1, it is characterized in that: second mask of described disk has the signal record zone, described projection is carried out the opening and the closing motion of described shutter in interior all sides of second of described disk, so that contact with second of described disk.

4, tray salver according to claim 3 is characterized in that: have a plurality of described shutters, described shutter has the projection of protruding to described disk center pit respectively.

5, tray salver according to claim 4 is characterized in that: described a plurality of shutters are respectively around the revolving shaft revolution that is located at described disk cartridge main body.

6, tray salver according to claim 5 is characterized in that: described a plurality of revolving shaftes are arranged on the described disk storage portion zone in addition of described disk cartridge main body.

7, tray salver according to claim 6 is characterized in that: described magnetic head peristome arrives the side of described tray salver main body, and the opposite is provided with described a plurality of revolving shaft near described side.

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