JPH1139766A - Disk cartridge and disk drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the low-order interchangeability of a disk drive device for large capacity and also to prohibit the insertion of a disk cartridge for large capacity to a conventional disk drive device. SOLUTION: The inclination of a corner part 21 of the front end part of the disk cartridge 20 is eliminated to form a square corner, and a recessed part 22 is provided around it. When the disk cartridge 20 is properly inserted, a pin 32 is pushed by the corner part 21, and the surface of curvature 30a of one end of a stopper arm 30 is pushed by the pin 32, and the pin 32 is slid in a groove 35 against a hooking coil spring 36. When the stopper arm 30 is rotated and the disk cartridge 20 is inserted to the position where the bent part 30b of another end part of the stopper arm is entered into the recessed part 22, the disk is loaded to the drive. When the insertion is oppositely made as to the front/rear or forth/back, the further insertion is interrupted at the time point when the bent part 30b is abutted on the end part of the disk cartridge 20, since no recessed part 22 exists at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge having a disk as a recording medium, a shell for accommodating the disk, an opening / closing shutter slidably mounted on the shell, and an insertion of the disk cartridge. Related to a disk drive device.

[0002]

2. Description of the Related Art A conventional disk cartridge, for example, a 3.5-inch floppy disk has been constructed as shown in FIG. In FIG. 7, reference numeral 1 denotes a shell (case) for accommodating a disk-shaped disc (recording medium) and a center hub (not shown) provided at the center of the disc.
The upper half and the lower half are formed into a flat casing by abutting and joining the peripheral walls to each other.

A shutter slide area (recess) 2 having a recording / reproducing opening (head window) is formed at the front end of the shell 1 (the leading end surface in the direction of insertion into the disk drive). A disc shutter 3 is slidably provided in the shutter slide area 2.

At one end (corner) of the front end of the shell 1, an inclined portion 4 having a 45-degree inclined surface is formed.

[0005] The conventional reverse insertion prevention measure when the disk cartridge constructed as described above is inserted into the disk drive device utilizes the inclined surface of the inclined portion 4. That is, the distal end of the reverse insertion preventing spring 11 is disposed in a portion of the cassette holder 10 of the disk drive device shown in FIG. 8 which faces the inclined portion 4 when the disk cartridge is correctly inserted. Figure 9
As shown in FIG. 9A, when the tip of the spring 11 slides along the inclined portion 4 and bends outward to allow the disc cartridge to be inserted, and when the disc cartridge is inserted upside down or upside down, FIG. As shown in b), the distal end of the spring 11 abuts against the end surface of the shell 1 to prevent the disk cartridge from being inserted.

[0006]

In recent years, special-purpose disks such as large-capacity magnetic disk cartridges formed in the same size as conventional disk cartridges have been developed. When this large-capacity magnetic disk cartridge is inserted into a conventional disk drive, it cannot be read out even though data is recorded on the disk, so it is determined that the drive has not been initialized and reformatted. Data may be erased.

When the shape of a large-capacity magnetic disk cartridge is determined based on the same concept as that of the conventional system, in the case of a large-capacity magnetic disk, the magnetic powder on the disk becomes finer and the film thickness becomes thinner. The durability of the chip by tapping is inferior to conventional discs.

[0008] For this reason, when the disk is erroneously inserted into a conventional disk drive device, especially in a drive without a damper, the speed at which the head chip hits the disk is high, so that the magnetic film of the disk is destroyed and data can be read and written. There is a risk of disappearing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to prevent the insertion of a large-capacity magnetic disk cartridge into a conventional disk drive,
In a disk drive device for a large-capacity magnetic disk cartridge, not only a large-capacity magnetic disk cartridge but also a conventional disk cartridge having an inclined portion at a shell end can be inserted, and the disk cartridge can be prevented from being reversely inserted. An object of the present invention is to provide an intended disk cartridge and disk drive device.

[0010]

[Means for Solving the Problems]

(1) In order to solve the above-described problems, the present invention provides a disk as a recording medium, a rotatable housing of the disk, a chucking opening facing a center core of the disk, and a signal recording unit of the disk. A disk cartridge comprising: a shell having a recording / reproducing opening facing it; and a shutter slidably mounted on the shell and opening / closing the recording / reproducing opening. When the disk cartridge is inserted into the disk drive device, a concave portion is provided on the peripheral edge, into which an end portion of a stopper member for preventing reverse insertion provided on the disk drive device side is fitted. The corner was formed in a shape without inclination.

(2) According to the present invention, when the disk cartridge is inserted into the disk drive device at the periphery of the recording / reproducing opening of the shell, the shutter opening / closing arm provided on the disk drive device side. The portion where the tip slides was formed in a flat shape.

(3) According to the present invention, a first path formed in the cassette holder of the large-capacity magnetic disk drive at a predetermined position in the middle of the insertion of the disk cartridge and formed in the insertion direction of the disk cartridge from the starting point. And a groove having a second path formed at a predetermined angle with respect to the first path, using the starting point as a starting point,
A pin that abuts on the shell end surface of the inserted disk cartridge and slides in the groove, and is provided near the end of the first path of the groove, and the pin slides on the first path when the disk cartridge is inserted; And a stopper member for preventing insertion of the disk cartridge when the disk cartridge is improperly inserted.

(4) In the present invention, the stopper member has a central portion rotatably fixed to the cassette holder, a curvature surface at one end of which the pin abuts, and a stopper surface at one end. The disk cartridge is characterized in that a bent portion is formed to suppress the progress of the shell end surface.

(5) When the disk cartridge of the present invention described in claims 1 and 2 is inserted into the disk drive device of the present invention described in claims 3 and 4, the pin comes into contact with the shell end surface of the disk cartridge. , Slides in the groove along the same path as the insertion direction of the disk cartridge, that is, along the first path.

When the pin slides near the end point of the first path, the pin comes into contact with a curvature surface at one end of the stopper member to rotate the stopper member. At this time, if the inserted disk cartridge is correctly inserted upside down or front and rear, the disk cartridge is inserted until the bent portion at the other end of the stopper member enters the concave portion of the disk cartridge, and loading is started.

In the case where the disc cartridge is inserted upside down or upside down, even if the pin slides to near the end point of the first path and abuts against the curvature surface at one end of the stopper member, Since there is no concave portion on the shell end surface of the cartridge, the bent portion at the other end of the stopper member abuts on the shell end surface of the disk cartridge, and prevents further entry of the disk cartridge.

(6) When a conventional disk cartridge having a 45 ° inclined surface at the end face of the shell is correctly inserted into the disk drive device according to the present invention as set forth in claims 3 and 4, the pins become the shell of the disk cartridge. The pin abuts against the inclined surface of the end face, and the pin slides along the second path in the groove by the action of the inclined angle. When the disc cartridge is inserted to a position where the pin moves to the end point of the second path, loading starts.

At this time, since the pin does not come into contact with the stopper provided on the first path side, the stopper member does not prevent the disk cartridge from entering.

When a conventional disc cartridge having a 45 ° inclined surface is inserted upside down or upside down, the pin comes into contact with the shell end surface where the inclined surface does not exist. Sliding along the path. At this time, as described above, even if the pin slides to near the end point of the first path and abuts against the curvature surface at one end of the stopper member,
Since there is no concave portion on the shell end surface of the disk cartridge, the bent portion at the other end of the stopper member abuts on the shell end surface of the disk cartridge, and prevents further entry of the disk cartridge.

(7) When the disk cartridge of the present invention is inserted into a conventional disk drive device, the disk cartridge of the present invention has an inclined surface at the front end or a groove for a shutter opening / closing arm. Is not provided, the disc cartridge is not inserted to the loading position.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. First, a disk cartridge of the present invention is shown in FIG. In FIG. 1, the same parts as those in FIG. 7 are denoted by the same reference numerals, and the description thereof will be omitted. The disk cartridge 20 configured as the large-capacity magnetic disk cartridge of the present invention has basically the same shape as a conventional 3.5-inch floppy disk, but differs in the following points.

(1) The inclined portion 4 provided in the conventional disk cartridge is eliminated, the corner portion 21 at the front end of the shell 1 is formed to have no inclined shape, and has a square corner like the other three corners.

(2) A recess 22 is formed at the periphery of the recording / reproducing opening side end of the shell 1 so that the end of the reverse insertion preventing stopper member provided on the disk drive device side is fitted.

The corner portion 21 acts to prevent the disk cartridge 20 of the present invention from being inserted into a conventional disk drive device that prevents reverse insertion by using, for example, the inclined portion 4 of FIG. 7 of the disk cartridge. Things.

That is, when the disk cartridge of FIG. 1 having the corners 21 is to be inserted into a conventional disk drive, the state shown in FIG. Prevents insertion.

When inserted into a disk drive device for a large-capacity magnetic disk, which will be described later, the concave portion 22 acts to identify whether the disk is inserted correctly or reversely.

Next, a disk reverse insertion prevention mechanism of the disk drive device for a large capacity magnetic disk according to the present invention will be described with reference to FIGS. FIGS. 2 and 3 show the basic principle of the main part of the disk drive device of the present invention when the disk cartridge is correctly inserted and when the disk cartridge is prevented from being reversely inserted. In these figures, reference numeral 30 denotes a stopper arm (stopper member) rotatably fixed to a support shaft 31 provided on a cassette holder of the disk drive device. 32 is a pin provided on the cassette holder side.

FIG. 2 shows a state in which the disk cartridge 20 of the present invention described in FIG. 1 is correctly inserted into the cassette holder. First, as shown in FIG. Pin 32 provided on
Hold down and move forward.

Next, after the pin 32 comes into contact with the end of the stopper arm 30, the disk cartridge 20 further advances, and the stopper arm 30 is rotated as shown in FIG. Further, as shown in FIG.
When the disk cartridge 20 is inserted to a position where the other end of the disk cartridge enters the recess 22, the disk is loaded into the drive.

FIG. 3 shows a state in which the disk cartridge 20 of the present invention described in FIG. 1 is inserted upside down. First, as shown in FIG. Push and move forward. When the disc cartridge 20 further advances after the pin 32 contacts the end of the stopper arm 30, the stopper arm 30 rotates as shown in FIG. 3B, and the other end of the arm 30 contacts the disc cartridge 20. . Since there is no concave portion 22 in this contact portion as in the case of FIG. 2,
The disk cartridge 20 cannot be inserted up to a loadable position as shown in FIG. 3C (the same position as in FIG. 2C), and loading becomes impossible. Also, when the front and rear of the disc cartridge 20 are inserted upside down, the operation is the same as in FIG.

As shown in FIG. 4, the stopper arm 30 is entirely formed in a U-shape, and its central portion is rotatably fixed to a support shaft 31. A predetermined curvature 30a is provided on a side of the one end of the stopper arm 30 opposite to the pin 32, and when the disk 32 comes into contact with the pin 32 with insertion of the disk cartridge, the pin 32 smoothly rotates the stopper arm 30. Act like. A bent portion 30b is formed at the other end of the stopper arm 30 so as to be parallel to the corresponding contact surface when the stopper arm 30 contacts the end surface of the disk cartridge. The bent portion 30b acts to prevent the stopper arm 30 from being deformed by the force received from the end surface of the disk cartridge when the disk cartridge is inserted upside down or upside down.

As shown in FIGS. 5 and 6, the support shaft 31 of the stopper arm 30 is used when the disc cartridge is inserted to a position where the disc cartridge is loaded into the disc drive.
The stopper arm 30 is provided upright on the cassette holder 10 at a position corresponding to the front end of the disk cartridge, and is rotatably supported by the support shaft 31 so that the curvature 30a faces the disk insertion side.

In the vicinity of the stopper arm 30 of the cassette holder 10, a first path 35a formed from the predetermined position during the insertion of the disc cartridge to the end point in the insertion direction of the disc cartridge, and the first path 35a are formed. A groove 35 having a second path 35b formed toward the outer side of the cassette holder 10 with respect to the path 35a and having an angle α set in a range of 0 to 45 ° is formed.

One end of a pin 32 is slidably fitted into the groove 35, and the other end of a hook coil spring 36, one end of which is fixed to the inside of the disk drive device, is latched by the pin 32. I have. When the disc cartridge is not inserted, the pin 32 is located on the starting point side of the groove 35 by the spring force of the hook coil spring 36.

FIGS. 5 (a) and 5 (b) show that the disk cartridge (disk cartridge of FIG. 1) 20 of the present invention is correctly inserted into the cassette holder 10 of the disk drive apparatus of the present invention constructed as described above. 2 shows a state in which the pin 32 has been inserted to a position where it can be loaded into the drive. FIG. 5C shows a cross section when the disc cartridge is inserted.

As can be seen from FIG. 5, when the disc cartridge 20 enters the pin 32, the pin 32 resists the spring force of the hook coil spring 36 and the first path 35a of the groove 35.
Will slide on the side. And the stopper arm 30
When the disc cartridge 20 is inserted to the position where the end of the bent portion 30b side of the disc cartridge 20 fits into the concave portion 22, the disc is loaded into the drive.

Also, when the disc cartridge 20 is inserted upside down or upside down, the pin 32 is not
Slides on the first path 35a side of FIG.
Bending portion 30b of stopper arm 30 as shown in FIG.
Since the concave portion 22 does not exist at the portion facing the side end portion, when the bent portion 30b comes into contact with the end portion of the disk cartridge, further insertion is prevented.

FIG. 6 shows a disk drive according to the present invention.
8 shows a state where the conventional disk cartridge having the inclined portion 4 described in FIG. 7 is inserted in a correct direction. In this case, the pin 32 is present at the starting point of the groove 35 as shown in FIG. Then, as the insertion of the disk cartridge proceeds, the pin 32 moves on the second path 35b side of the groove 35 while sliding on the inclined portion 4, so that the stopper arm 30 does not rotate. When the pin 32 reaches the end point of the second path 35b as shown in FIG. 6B, the disk insertion side surface of the stopper arm 30 comes into contact with the end of the disk cartridge, and at this time the disk is loaded into the drive. You. Thus, the disk drive of the present invention can insert a conventional disk cartridge.

When the conventional disk cartridge having the inclined portion 4 is inserted upside down or upside down, since the inclined portion 4 does not exist at a portion facing the pin 32, the pin 32 is Is moved on the side of the first path 35a. Therefore, the stopper arm 30 rotates as in FIG. 3, and the insertion of the disc cartridge is prevented by the bent portion 30b.

In the conventional disk drive device, the reverse insertion is prevented by utilizing the opening and closing arm pin inserted into the groove 23 for the shutter opening and closing arm shown in FIG. 2 provided in the recording / reproducing opening of the disk cartridge. There is a device to do.

In order to prevent the large-capacity disk cartridge of the present invention from being inserted into such a disk drive device, the present invention fills the groove 23 for the shutter opening / closing arm shown in FIG. I do.
Even if it is formed flat in this way, it can be inserted into the disk drive of the present invention without any problem.

Thus, it is possible to protect the backward compatibility of the large capacity disk drive device and to make it impossible to insert the large capacity disk cartridge of the present invention into all the conventional disk drive devices.

The relationship between the above-described disk cartridge and the disk drive is shown in Table 1 below.

[0044]

[Table 1]

[0045]

As described above, according to the present invention, the following excellent effects can be obtained.

(1) According to the first and second aspects of the present invention, insertion of a large-capacity disk cartridge into a conventional disk drive device can be prohibited. Further, since the shape of the shutter used for the large-capacity disk cartridge of the present invention is the same as that of the conventional product, the existing mold can be used. In addition, since it has almost the same shape as the conventional 3.5-inch floppy disk, it is possible to divert the existing disk case and the like.

(2) According to the third and fourth aspects of the present invention, backward compatibility of a large-capacity disk drive can be maintained. That is, not only large-capacity magnetic disk cartridges, but also conventional disk cartridges having an inclined portion at the shell end can be inserted, and reverse insertion of these disk cartridges can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a disk cartridge according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory view when the disk cartridge of the present invention is correctly inserted into the disk drive device of the present invention.

FIG. 3 is a schematic explanatory view when a disk cartridge is inserted into a disk drive device of the present invention with the front and back or upside down.

FIG. 4 is an enlarged view of a main part of the disk drive device of the present invention.

FIGS. 5A and 5B show a state where the disk cartridge of the present invention is correctly inserted into the disk drive device of the present invention, and FIG.
FIG. 2 is a configuration diagram, FIG. 2B is an enlarged view of a main part, and FIG.

6A and 6B are diagrams showing a state where a conventional disk cartridge is correctly inserted into the disk drive device of the present invention, wherein FIG. 6A is a configuration diagram showing an initial insertion state, and FIG.

FIG. 7 is a plan view of a conventional disk cartridge.

FIG. 8 is a configuration diagram showing a relationship between a conventional disk cartridge and a conventional disk drive device.

9A and 9B show a state in which a conventional disk cartridge is inserted into a conventional disk drive device, wherein FIG. 9A is an explanatory diagram when inserted correctly, and FIG. 9B is an explanatory diagram when inserted upside down or upside down. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shell 2 ... Shutter slide area part 3 ... Disc shutter 4 ... Inclined part 10 ... Cassette holder 20 ... Disk cartridge 21 ... Corner part 22 ... Concave part 23 ... Shutter opening / closing arm groove 30 ... Stopper arm 30a ... Curvature 30b ... Bending Part 31: Support shaft 32: Pin 35: Groove 35a: First path 35b: Second path 36: Hook coil spring

Claims (4)

[Claims] 1. A disk as a recording medium, a rotatable housing of the disk, and a chucking opening facing a center core of the disk and a recording / reproducing opening facing a signal recording portion of the disk. A disk cartridge, comprising: a shell; and a shutter slidably mounted on the shell and opening and closing the recording / reproducing opening, wherein the disk cartridge is mounted on a periphery of the recording / reproducing opening side end of the shell. When inserted into
A concave portion into which an end portion of a stopper member for preventing reverse insertion provided on the disk drive device side is fitted is provided, and a corner on the recording / reproducing opening side of the shell is formed in a shape without inclination. Disk cartridge. 2. The peripheral edge of the recording / reproducing opening of the shell, at which a tip of a shutter opening / closing arm provided on the disk drive device slides when a disk cartridge is inserted into the disk drive device. The disk cartridge according to claim 1, wherein the disk cartridge is formed in a flat shape. 3. A first path formed in a cassette holder of a large-capacity magnetic disk drive device from a predetermined position in the middle of insertion of a disk cartridge in a direction in which the disk cartridge is inserted from the start point, A groove having a second path formed at a predetermined angle with respect to the first path, and a pin abutting on a shell end face of the inserted disk cartridge and sliding in the groove. The disk is provided near the end of the first path of the groove, and when the pin slides along the first path due to the insertion of the disk cartridge and the disk cartridge is improperly inserted, A disk drive device comprising a stopper member for preventing insertion of a cartridge. 4. The stopper member has a center portion rotatably fixed to the cassette holder, a curvature surface at one end of which the pin abuts, and a shell end surface of the disk cartridge at the other end. 4. The disk drive device according to claim 3, wherein a bent portion for suppressing the progress of the movement is formed.