JPH0434225B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording or reproducing device, and particularly to a recording or reproducing device that uses a rotating recording medium as a recording medium.

[Summary of disclosure]

The recording or reproducing device disclosed herein places the recording medium in a movable housing member to set the recording medium at a recording or reproducing position in order to accurately and reliably mount the recording medium on the rotational drive shaft. The mounting portion is equipped with a mounting means for mounting the drive shaft with great pressure, while the mounting means holds the outer cover member movable to a predetermined position for shielding the housing member when the outer cover member is moved to a predetermined position. By applying pressure to release the mounting means, the mounting means is prevented from being subjected to any load when rotating the recording medium.

[Conventional technology]

For example, various devices are known that record or reproduce information using a recording medium such as a rotating magnetic sheet. In such a device, it is necessary to accurately and reliably mount the recording medium on the rotational drive shaft. In other words, if the recording medium is not fully installed, the recording track will become eccentric with respect to the rotation axis, and for example, if the recorded recording medium is played back by another playback device, the track may not be traced properly. I have said something. In addition, if the mounting is not performed accurately, the spacing loss between the recording medium and the head increases, causing problems in signal conversion between the recording medium and the head.

As a method for solving the above-mentioned drawbacks, there have been conventionally known mounting methods in which the recording medium is press-fitted into the rotational drive shaft, or the rotational drive shaft is made tapered to reduce the eccentricity mentioned above. There is. In such a mounting method, for example, a permanent magnet is placed on the rotary drive shaft as a means for positioning the recording medium at a predetermined position, and a magnetic material is provided at a corresponding position on the recording medium, so that a magnetic material is placed between the two. The recording medium is positioned at a predetermined position with respect to the rotation drive shaft by the suction force of A mechanism is used that includes a pressing means that rotates integrally with the recording medium or maintains contact with the recording medium during reproduction.

However, in the case of the former method using permanent magnets, it is necessary to make the attractive force of the permanent magnet sufficiently large, which requires increasing the volume of the permanent magnet or using expensive rare earth materials. Furthermore, in the case of recording media such as magnetic sheets, there is a limit to increasing the attractive force of permanent magnets due to the magnetic influence during recording and reproduction of information.
Further, the latter recording medium is forcibly pressed against the rotational drive shaft to rotate integrally with the recording medium. Alternatively, in the case of a mechanism equipped with a pressing means that maintains the contact state, the influence on the rotation accuracy of the recording medium and the load on the drive motor will be large, especially in recording or reproducing apparatuses that use a small rotating shaft seat and motor. It is not suitable for

In order to solve this inconvenience, some devices have conventionally been used in which, when loading a recording medium, the recording medium is pressed against the rotational drive shaft in its mounting section, and then this pressure mounting is released. Proposed.

For example, a movable housing member that houses a recording medium and sets it to a recording or reproduction position is provided with a movable outer lid member to close the housing member, and the above-mentioned mounting means is provided to carry out press mounting when the outer lid member is moved;
Thereafter, when the outer cover member is locked in a predetermined position with respect to the main body of the device, the pressure attachment is automatically released, or a release means is provided that responds to the completion of closing of the outer cover member. A device has already been proposed in which the pressure mounting is released by pressing the button.

[Problem that the invention seeks to solve]

However, in the above two examples, since the outer lid member is equipped with a mounting means,
It is difficult to guarantee positional accuracy when pressing the mounting portion of the recording medium, and there are difficulties in assembling accuracy.Furthermore, since it is necessary to press the recording medium housed in the storage member, the mounting means itself has to be enlarged. This may hinder miniaturization of the device.

Therefore, the present invention can sufficiently ensure positional accuracy when pressing the mounting portion of the recording medium, and thereby,
A recording or reproducing device that can be more accurately and securely attached to a rotary drive shaft, and that can contribute to miniaturization and cost reduction by simplifying and downsizing the configuration for attaching and releasing the device. The purpose is to provide

[Means for solving problems]

In order to achieve the above object, the recording or reproducing device of the present invention accommodates a recording medium, and loads the recording medium into an open position where it can be attached and removed and a recording or reproducing position where recording or reproducing operation is possible. a storage member arranged to be movable between possible closing positions; a rotary drive member for rotating the recording medium loaded in the recording or reproduction position; and a rotational drive member arranged on the storage member and arranged on the storage member. mounting means for pressing and mounting the recording medium against the rotational drive member in response to movement of the recording medium from the open position to the closed position; and mounting means for moving the storage member from the open position to the closed position. and an outer lid member that is movable to a predetermined position and that engages with and releases pressure from the mounting means at least at the predetermined position.

[Effect]

In the above configuration, first, when the housing member is moved to the predetermined position in order to set the recording medium to a recording or reproduction position, the mounting means presses and mounts the recording medium against the rotational drive shaft. Then, when the outer cover member is moved to the predetermined position to close the housing member, the press attachment is released by the outer cover member acting on the mounting means at least in the predetermined position. Therefore, only the recording medium is a load on the rotational drive shaft.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, referring to FIG. 1, reference numeral 1 indicates a recording medium storage cassette in which a rotating disc-shaped flexible magnetic sheet 2 as a recording medium is stored. A center core 3 made of synthetic resin or the like is integrally provided at the center of the magnetic sheet 2 as a mounting portion for a drive spindle, and a magnetic plate 4 is fixed to the center core 3. The cassette 1 is provided with upper and lower openings 1a and 1b, into which stabilizing plates 23 and 32 (to be described later) for stabilizing the rotation of the sheet 2 can enter. 1c and 1d
(Fig. 2B, Fig. 3B, Fig. 4B) are openings on the upper surface side and lower surface side corresponding to the center core 3, 1e
and 1f are positioning holes of the cassette 1.

A mounting hole 3c for a rotary spindle 34 (to be described later) is formed in the center of the center core 3, and includes two sloped parts 3b and a spring part 3a. The core 3 is attached so that the slope portion 3b of the core 3 is in contact with the core 3.

Reference numeral 11 indicates a cassette holder as a cassette storage member, into which the cassette 1 is inserted from the direction of arrow C. The cassette holder 11 is rotatably supported by shafts 12 (only the left side is shown in the figure) on both sides of the cassette holder 11 at a hinge portion 31a provided on the apparatus main body 31, which will be described later. Yes, openings 1a and 1c on the top side of the cassette 1
Openings 11a and 11b are provided corresponding to the openings 11a and 11b, respectively. Also, the recess 11d on the top surface of the holder 11
A center core pressing member 13 is provided as a mounting means.
A pair of rising portions 1 for receiving the rotation shaft 13d of
1c is provided, and the pressing member 13 is provided while being biased clockwise by a spring 14 around a shaft 13d. A semicircular pressing portion 13a for pressing the center core 3 of the magnetic sheet 2 is provided at the tip of the pressing member 13, and the pressing portion 13a is positioned above the opening 11b of the holder 11.
Further, its tail end 13b protrudes from the left side of the holder 11. Reference numeral 15 denotes a pair of coil springs provided on the upper surface of the holder 11, which presses the outer cover 21 (described later) from below, and causes a movement between the holder 11 and the outer cover 21 in relatively opposite directions, that is, in the expansion direction. It acts to generate rotational force.

The opening 11a of the holder 11 is for entering an upper stabilizing plate 23, which will be described later, for stabilizing the magnetic sheet 2 against a head 33, which will be described later. It's a pin. Further, numeral 17 is a pin for guiding the vertical movement of the pressing member 13, which is implanted on the upper surface of the holder 11 and enters into the hole 13e of the pressing member 13.

21 is an outer cover that closes off the holder 11;
Similar to the holder 11, the shafts 22 on both sides of the hinge portion 31b provided on the side of the device main body 31 (described later)
(Only the left side is shown in the figure). A locking mechanism (not shown) is provided between the end 21a of the outer lid 21 and the main body of the apparatus (not shown), but is not shown here. Further, a hook portion 21b is provided on the side of the outer lid 21, and as shown in FIG. The expansion angle of the outer lids 21 and 11 due to the application force is kept constant. Furthermore, an upper stabilizing plate 23 is provided on the ceiling of the outer cover 21 at a position corresponding to the opening 11a of the holder 11 in order to stabilize the magnetic sheet 2 against a magnetic head 33, which will be described later.

Reference numeral 31 indicates the main body of the apparatus, which includes a pair of hinge parts 31a (only the right side is shown in the figure) for supporting the left and right shafts 12 of the cassette holder 11, and also for supporting the left and right shafts 22 of the outer lid 21. A pair of hinge portions 31b are provided. A lower stabilizing plate 32 is provided on the stage surface 31c of the main body 31 at a position corresponding to the opening 1b of the cassette 1, and stabilizes the magnetic sheet 2 in cooperation with the upper stabilizing plate 23 of the outer lid 21. let Reference numeral 33 denotes a magnetic head for recording or reproduction, which enters into the interior of the cassette 2 through the opening 1b of the cassette 2 through the opening 32a of the stabilizer plate 32, and is provided so as to protrude so as to come into contact with the magnetic sheet 1. The magnetic head 33 is moved in the direction of arrow D in the figure by a known mechanism (not shown), thereby changing the recording or reproducing position on the magnetic sheet 2. 34 is a spindle that is rotationally driven by a sheet rotation motor (not shown) and is a rotational drive shaft for the magnetic sheet 2;
As shown in FIG. 4B, the magnetic plate 4 provided on the lower surface of the center core 3 contacts the lower end surface 34b of the flange portion 34a, thereby regulating the height of the magnetic sheet 2 relative to the head 33. be done. A permanent magnet 35 is provided on the flange portion 34a of the spindle 34, and attracts the magnetic plate 4 provided on the lower surface of the center core 3 described above.
36 and 37 are stage surfaces 31c of the main body 31, respectively.
These are cassette positioning pins provided at positions corresponding to the positioning holes 1e and 1f of the cassette 1 above. 38 is a base plate fixedly provided on the stage surface 31 at a position corresponding to the left side of the holder 11;
A shaft 39 is fixed to this, and on the same shaft 39 is a lever 40 which is an operating member for rotating the pressing member 13 clockwise against the spring 14 to act on the center core 3 of the magnetic sheet 2. is rotatably supported. Reference numeral 41 denotes a spring whose both ends are hung on the stage surface 31c and the tail end 40b of the lever 40, respectively, and bias the lever 40 clockwise about the shaft 39. In this case, the clockwise rotation of the lever 40 is restricted by the tail end 40b abutting against the stage surface 31c. Also, lever 40
The tip end 40a of the press member 13 can be engaged with the tail end 13b of the pressing member 13. Further, the spring 41 acting on the lever 40 has a stronger spring force than the spring 14 acting on the pressing member 13.

Although not shown in the figure, between the outer cover 21 and the main body 31, the outer cover 21 is connected to the main body 31 as shown in FIG. 2A.
A spring for expanding the outer lid 21 and a stopper for restricting the opening angle of the outer lid 21 at this time to a predetermined angle are provided.

Next, the operation of the apparatus having the above configuration will be explained step by step with reference to FIGS. 2A, B to 4A, B.

First, FIG. 2A shows a state in which the outer cover 21 and the holder 11 are opened in order to insert or remove the cassette 1. In this state, as shown in FIG. 2B, the center core pressing member 13 is rotated counterclockwise by the spring 14 until its tail end 13b abuts against the upper surface of the cassette holder 11. 13a is the opening 1 of the holder 11
1b, and does not interfere with cassette 1 when inserting or removing cassette 1.

Next, the cassette 1 is inserted into the holder 11 from the direction of arrow C in FIG. 2A, and the outer cover 21 is rotated clockwise against a spring (not shown). in this case,
Due to the biasing force of the spring 15 provided on the holder 11 and the action of the pin 16 and the hook portion 21b of the outer cover 21, the holder 11 and the outer cover 21 are kept at a constant distance (angle).
Rotate clockwise while holding the position. Then, as shown in FIG. 3A, the holder 11 is attached to the device main body 31.
In contrast, the spindle 34 enters the mounting hole 3c of the center core 3 of the magnetic sheet 2 in the process of reaching a predetermined position for setting the cassette 1 to the recording or reproducing position, and further rotates the holder 11. Near the final stage, the tail end 13b of the pressing member 13 abuts against the tip 40a of the lever 40, as shown in FIG. 3B.
In this case, the spring 41 acting on the lever 40 is compared to the spring 14 acting on the pressing member 13.
has a stronger spring force, this collision causes the pressing member 13 to rotate clockwise against the spring 14, and the pressing portion 13a of the holder 1
1 and presses the center core 3 of the magnetic sheet 2 until the magnetic plate 4 on the lower surface abuts against and is regulated by the end surface 34b of the flange portion 34a of the spindle 34. In this case, the excessive amount of operation of the lever 40 relative to the pressing member 13 can be avoided by, for example, forming the pressing part 13a into a "U" shape as shown in FIG. It can be absorbed by leaving it there, and for this purpose the pressing member 13 can be made of plastic, for example. Alternatively, by adjusting the spring force of the spring 41 acting on the lever 40, the magnetic plate 4 on the lower surface of the center core 3 collides with the end surface 34b of the flange portion 34a of the spindle 34, thereby exerting a force on the pressing member 13. When the resistance force exceeds a predetermined value, the lever 40 may be rotated clockwise in FIG. 3A against the spring 41.

At this point, the magnetic sheet 2 is accurately and reliably attached to the spindle 34 at its center core 3. In addition, in this installation completion state, the magnetic plate 4 on the lower surface of the center core 3 is attracted to the permanent magnet 35 provided on the flange portion 34a, and the spring portion 3a (the first
), the spring part 3a and the two slope parts 3b
(FIG. 1) and the outer peripheral surface of the spindle 34, lateral pressure acts, and the magnetic sheet 2 is fixed to the spindle 34. Also, in this state, the main body 31
The positioning pins 36 and 37 provided on the stage surface 31c of the cassette 1 are connected to the positioning holes 1e of the cassette 1, respectively.
and 1f to determine the position and height of the cassette 1. On the other hand, as shown in FIG. They enter the inside of the magnetic sheet 1 and come to oppose and come into contact with the recording surface of the magnetic sheet 1, respectively.

As the outer cover 21 continues to rotate further, the outer cover 21 eventually reaches a predetermined position where it blocks the holder 11, as shown in FIG. locked against the
At least in this predetermined position, the ceiling portion of the outer cover 21 is located at the tail end 13b of the center core pressing member 13.
The projection 13c provided on the upper surface of the side is pressed, and the pressing member 13 is rotated counterclockwise as shown in FIG. 4B, and the pressing of the center core 3 by the pressing portion 13c is released. By locking the outer lid 21 in this position as described above, the pressing member 13 is held in a released state. In this case, the lever 40 is rotated counterclockwise against the spring 41 as shown in FIG. 4A. In addition, in this state, as shown in FIG. 4B, the upper stabilizing plate 2 provided on the ceiling of the outer cover 21
3 is the opening 11a of the holder 11 and the cassette 1
The magnetic sheet 2 is advanced into the cassette 1 through the opening 1a and comes to approach and oppose the upper surface of the magnetic sheet 2. Therefore, when the magnetic sheet 2 is rotationally driven by the spindle 34, the magnetic sheet 2 is stabilized with respect to the magnetic head 33. This ensures that the magnetic head 33 is in good contact with the magnetic head 33.

A detailed explanation is required for the fact that when the outer cover 21 and holder 11 are opened to take out the cassette 1 from the states shown in Fig. 4A and B, the state returns to the state shown in Fig. 2 through the states shown in Figs. 3A and B. probably won't.

[Modified example]

As a modification of the embodiment described above, for example,
The lever 40 that acts on the pressing member 13 on the device main body 31 side and the associated members 38, 39, and 41 can be replaced by simply one coil spring or the like, thereby reducing the number of parts. I can do it.

Alternatively, instead of eliminating the members 38 to 41 on the device main body 31 side, a spring 14 acting on the pressing member 13 may be placed at a position corresponding to the vicinity of the tip of the pressing member 13 on the ceiling of the outer cover 21. A biasing member such as a coil or a leaf spring with a large spring force is provided, and during the rotation of the outer lid 21 to close and close the holder 11, this biasing member first acts near the tip of the pressing member 13 and the same force is applied. By rotating the pressing member 13 clockwise against the spring 14 as shown in FIG. 3, a pressing operation is performed against the center core 3, and after that, at least the outer cover 21 is moved to the end position of rotation, that is, In the positions shown in FIGS. 4A and 4B, as shown in these figures, the ceiling of the outer cover 21 touches the tail end 13 of the pressing member 13.
The pressure on the center core 3 may be released by pressing the protrusion 13c on the side and rotating the pressing member 13 counterclockwise against the previous urging member. It is possible to reduce the number of points.

Although the embodiments above have shown examples in which the present invention is applied to a recording or reproducing device that uses a flexible magnetic sheet housed in a cassette, the present invention is not limited to such embodiments. , can be similarly applied to devices using, for example, bird disks (magnetic or optical disks).
It can produce similar effects.

〔effect〕

As described in detail above, according to the present invention, positional accuracy can be sufficiently guaranteed when pressing the mounting portion of the recording medium.
This allows for more accurate and reliable attachment to the rotary drive shaft, and also simplifies and downsizes the configuration for attachment and release, contributing to smaller and less expensive devices. This is extremely useful in recording or reproducing devices that use rotating recording media.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the cassette loading section of an embodiment of the present invention, which is the main part related to the present invention, and FIGS. 2A and 2B show the settings of related members when the outer lid is open. A direction A view and a BB sectional view in FIG.
A view taken in the direction A and a sectional view taken along the line B-B in the figure; FIGS. 4A and 4B are views taken in the direction A in FIG. and BB sectional view. DESCRIPTION OF SYMBOLS 1... Magnetic sheet cassette, 2... Magnetic sheet, 3... Center core, 11... Cassette holder, 13... Center core pressing member, 14...
Spring, 21...Outer cover, 31...Device main body, 33...
...Magnetic head, 34...Spindle, 38...Main plate, 40...Lever, 41...Spring.

Claims (1)

[Scope of Claims] 1. A housing that accommodates a recording medium and is movably arranged between an open position where it can be attached and removed and a closed position where it can be loaded into a recording or playback position where recording or playback operations can be performed. a rotational drive member for rotating the recording medium loaded in the recording or reproducing position; and a rotational drive member disposed on the housing member, which responds to the movement of the housing member from the open position to the closed position. mounting means for pressing and mounting the recording medium onto the rotary drive member; movable to a predetermined position to move the storage member from the open position to the closed position; A recording or reproducing device comprising: an outer lid member that engages with the mounting means at a predetermined position and releases the pressure thereon.