JPH0325865B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] A recording medium housed in a cartridge case is
To protect from external dust, fingerprints, etc.
The opening is covered with a shutter when not in use, and left open when in use. A medium press is provided that utilizes the return force of the shutter, and the medium press is used to fix the recording medium during transportation and storage, thereby preventing the generation of dust and preventing read errors.

[Industrial application field]

The present invention uses the return force of a shutter that can be opened and closed to protect recording media (optical discs, magnetic discs, etc.) housed in a cartridge case from dust, fingerprints, etc., and fixes the recording media to avoid dust generation. This article relates to a disk cartridge that prevents read errors.

The recording medium housed in the cartridge case has an opening into which a head is inserted and a motor inserted to rotate the recording medium, for example, in order to concentrically record information or reproduce it. It has an opening.

Generally, recording media with high information density (optical disks,
(magnetic disks, etc.) have serious problems with dust, fingerprints, etc., and physical damage. In order to minimize the chance of dust, fingerprints, etc. adhering to the drive unit, the above opening is open when the recording medium is loaded into the drive unit, while it is outside the drive unit when it is stored or carried. In some cases, a shutter is provided to close the opening.

Since the recording medium rotates within the cartridge case, there is a gap of 1 to 1.5 mm between the recording medium and the inner wall of the case.

Therefore, during transportation and storage, the recording medium rattles inside the case and generates dust, which adheres to the recording medium and causes a read error. Therefore, there is a need for a disk cartridge that does not generate dust.

[Conventional technology]

Fig. 2 shows a conventional optical disk cartridge, in which Fig. A is a plan view and Fig. B is a side view.

In the figure, a disk cartridge 1 includes a recording medium 3 having a center hole (a hole into which a motor shaft is inserted) 2, and the outside of the recording medium 3 is covered with a cartridge upper case 4 and a cartridge lower case 5. The upper and lower cases 4 and 5 have a motor insertion opening 6 exposing the center hole 2, a head insertion opening 7 provided radially with respect to the motor insertion opening 6, and a detector insertion for detecting an index signal. It has an opening 8. Furthermore, shutters 9 for sliding inside the cartridge upper case 4 and cartridge lower case 5 to shield the center hole 6, head insertion opening 7, and detector insertion opening 8 are provided on the upper and lower sides of the recording medium 3. The shutter 9 has its center of rotation at one end a, and its longitudinal tip b connects a spring 11 wound around a bobbin 10 fixed to the case, and is constantly tensioned to the left in the figure. Further, one end of the steel belt 12 is fixed to the tip b,
The other end is fixed to a rectangular guide member 14 that moves in engagement with a pin 13 of the drive device. Note that 15 is a roller that guides the steel belt 12.

When the guide member 14 is engaged with the pin 13 on the driving device side and moves within the movement groove 16 to be located at 14', the shutter 9 rotates and opens the openings 7, 6, and 8.

Further, when the driving device releases the engagement between the pin 13 and the guide member 14, the shutter 9 is returned by the spring 11 and each opening is closed.

Note that the cartridge upper case 4 and the cartridge lower case 5 each have a wall portion 17 in contact with the outer periphery of the recording medium 3 and a protrusion portion 18 in contact with the thickness direction.
The optical disk 3 is rotatable inside.

[Problem that the invention seeks to solve]

In order to hold and rotate the recording medium 3 inside the conventional disk cartridge 1, the upper cartridge case 4 and the lower cartridge case 5 each have a wall 17 in contact with the outer periphery of the recording medium 3 and a protrusion in contact with the thickness direction. A section 18 is provided.

The outer periphery of the recording medium 3 and the cartridge upper case 4,
The gap between the wall 17 of the cartridge lower case 5 is 1~
There is 1.5mm. During transportation and storage, the recording medium 3 rattles inside the upper and lower cases 4 and 5 due to this gap, comes into contact with the wall portion 17 and the protrusion portion 18, and generates dust. There was a problem in that the dust adhered to the surface of the recording medium 3, resulting in read errors.

[Means for solving problems]

FIG. 1 is a diagram explaining the principle and embodiments of the present invention.

The disk cartridge 1' of the present invention shown in FIG. 1 is different from the conventional disk cartridge 1 shown in FIG. , 8 is provided with a medium presser 19 that comes into contact with the tip of the shutter 9 when the shutters 9 are shielded.

The medium presser 19 is made of a material such as resin and has an inverted L shape, and has a hole in the center so that it can rotate by engaging with a support shaft 20 fixed to the cartridge lower case 5. One end e of the medium presser 19 is connected to the outer periphery of the recording medium 3. touching, other end f
should be in contact with the tip of the shutter 9.

In addition, a torsion coil spring 21 is attached to the support shaft 20 of the medium presser 19, so that the medium presser 19 is attached to the shutter 9.
When it is not in contact with the recording medium 3, tension acts in a direction that does not press the recording medium 3, and the recording medium 3 is not pressed.

The structure of the other parts of the disk cartridge 1' is exactly the same as the conventional cartridge shown in FIG. 2, and the explanation thereof will be omitted.

[Effect]

That is, in FIG. 1, when the pin 13 on the driving device side and the guide member 14 are engaged, the guide member 14 is moved downward in the figure by the pin 13, and the shutter 9
moves and opens the shielded openings 7, 6, 8. At this time, the medium presser 19 is attached to the torsion coil spring 2.
1, the recording medium 3 is rotated clockwise to release the fixation of the recording medium 3 and become readable/writable.

Further, when the engagement between the pin 13 on the driving device side and the guide member 14 is released, the guide member 14 returns due to the return force of the spring 11, and the shutter 9 is restored and closed.
At this time, the medium presser 19 is rotated by the tip of the shutter 9 to press and fix the side surface of the recording medium 3 against the wall portion 17.

Therefore, since the recording medium 3 is in the fixed state during transportation and storage, the recording medium 3 does not move inside the upper and lower cases 4 and 5, thereby preventing the generation of dust and read errors.

〔Example〕

FIG. 1 is an internal plan view showing one embodiment of the present invention.

The disk cartridge 1' of the present invention shown in FIG. 1 has a center hole (hole into which the motor shaft is inserted), similar to the conventional disk cartridge 1 shown in FIG.
2 is covered with a cartridge upper case 4 and a cartridge lower case 5. Both the upper cartridge case 4 and the lower cartridge case 5 have a motor insertion opening 6, and a head insertion opening 7 and a detector insertion opening 8 provided radially with respect to the motor insertion opening 6. Furthermore, there is a shutter 9 that slides inside the upper and lower cartridge cases 4 and 5 to shield the respective motor insertion opening 6, head insertion opening 7, and detector insertion opening 8, and the shutter 9 has one end a A spring 11 wound around a bobbin 10 on the case is connected to the tip b in the longitudinal direction, and tension is constantly applied to the left in the figure.
2 is fixed at one end, and the other end is connected to the pin 13 of the drive device.
The guide member 14 is fixed to the guide member 14, which moves in engagement with the guide member 14. Note that 15-1 is the roller, 15-2 is the guide,
It contacts the steel belt 12. 17 is the wall, 18
It is a protrusion.

In the present invention, a medium presser 19 is provided which contacts the tip of the shutter 9 when the shutter 9 is closed. The medium presser 19 is made of a material such as resin and has an inverted L shape, with one end e
is in contact with the outer periphery of the recording medium 3, the other end f is in contact with the tip of the shutter 9, has a hole in the center, and is rotatable by fitting the hole into a support shaft 20 fixed to the cartridge lower case 5.

Further, a torsion coil spring 21 is attached to the support shaft 20 of the medium presser 19, and when the medium presser 19 is not in contact with the shutter 9, tension is applied in a direction that does not press the recording medium 3, so that the structure is such that the recording medium 3 is not pressed. be.

When the disk cartridge 1' is inserted into the drive device, the pin 13 on the drive device side engages with the guide member 14 and slides the guide member 14 in the downward direction as shown in the figure. Therefore, the shutter 9 opens the shielded openings 6, 7, and 8 by the steel belt 12, and the medium presser 19 rotates in the opposite direction by the spring force of the torsion coil spring 21, releasing the fixation of the recording medium 3. , read/write.

Furthermore, when the disk cartridge 1' is pulled out from the drive device, the guide member 14 is returned by the restoring force of the spring 11, the shutter 9 is restored, and the opening 6,
7 and 8, the shutter 9 rotates the medium presser 19 by the spring 11, and the medium presser 19
The recording medium 3 is pressed and fixed against the wall portion 17 side.

Therefore, since the recording medium 3 is in the fixed state during transportation and storage, the recording medium 3 does not move inside the upper and lower cartridge cases 4 and 5, so that no dust is generated and read errors can be prevented.

〔Effect of the invention〕

As explained above, according to the present invention, during transportation,
The holding mechanism of the recording medium prevents the generation of dust during storage and prevents read errors.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the principle and one embodiment of the present invention, and FIG. 2 is a diagram for explaining a conventional optical disk cartridge. In the figure, 1' is a disk cartridge, 2
is the center hole, 3 is the recording medium, 4 is the cartridge upper case, 5 is the cartridge lower case, 6 is the motor insertion opening, 7 is the head insertion opening, 8 is the detector insertion opening, 9 is the shutter, and 10 is the bobbin. ,
11 is a spring, 12 is a steel belt, 13 is a pin, 14 is a guide member, 15-1 is a roller, 15-2
16 is a guide, 16 is a moving groove, 17 is a wall, 18 is a protrusion, 19 is a medium presser, 20 is a support shaft, and 21 is a torsion coil spring.

Claims (1)

[Scope of Claims] 1. Cartridge cases 4 and 5 containing a disk-shaped recording medium 3 have a head insertion opening 7 for recording or reproducing information on the recording medium 3, A disk cartridge is provided with a shutter 9 for shielding or opening the head insertion opening 7 when necessary, and a guide member 14 for imparting an opening movement to the shutter 9, in the cartridge cases 4 and 5. A medium presser 19 rotatably fitted onto the shaft 20 is provided, and when the shutter 9 is closed, one end of the medium presser 19 is pushed by the tip of the shutter 9 and rotates, and the other end presses the recording medium 3. By pressing the outer peripheral surface of the cartridge case, the recording medium 3 is pressed and fixed against the wall 17 of the cartridge case, and when the shutter 9 is opened, the medium presser 19 follows the opening movement of the shutter 9. 1. A disk cartridge characterized in that the recording medium 3 is released from being fixed by rotating it in the opposite direction.