JPH05796B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a video disk, a PCM disk,
The present invention relates to a disk cartridge for storing high-density recording/reproducing disks such as digital disks.

[Background of the invention]

In order to protect the surface of a high-density recording/reproducing disk from scratches, dust, etc., it is desirable to use it by storing it in a disk cartridge. However, in a method in which a disk is attached to a recording/playback device together with a disk cartridge, and the disk is rotated within the disk cartridge for recording and playback, it is necessary to prevent the disk from moving and being damaged within the cartridge when the disk is not in use. , the disk must be fixed in some way. Also,
When the disk is inserted into the recording/reproducing apparatus, it must be placed in a free state within the cartridge and attached to the disk rotating spindle provided on the recording/reproducing apparatus. Conversely, when the cartridge is taken out from the recording/reproducing apparatus, , the disk must be automatically secured within the cartridge after being removed from the rotating spindle. Regarding the position at which the disk is fixed within the disk cartridge, it is best to fix the disk at approximately the center of the disk cartridge, even considering the possibility that the cartridge may be deformed by external force.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk cartridge that can stably hold a disk by preventing the disk from moving horizontally or vertically with respect to the disk surface within the cartridge.

[Summary of the invention]

In order to achieve the above object, the present invention has first and second cover members for accommodating a disk on which information can be optically recorded or reproduced, the first and second cover members A disk cartridge having a hole for rotationally driving a disk housed therein and a hole for optically recording or reproducing information on the disk, in at least one of the first or first disk cartridge. On the inside of at least one of the cover members of No. 2,
At least first to third rollers are provided so as to contact the outer circumferential edge of the disk and hold the disk, the first roller being rotatably provided to the clamper, and the second and third rollers being rotatably provided to the clamper. is rotatably arranged around a predetermined fixed fulcrum,
The first to third rollers have a cross-sectional shape that is constricted near the center and has thick tapered surfaces at both ends, and when the disk is not in use, the first roller moves the disk to the second or third roller. The outer peripheral end of the disk is pressed against the third roller to prevent the disk from coming into contact with the inside of the first or second cover member at the constriction near the center of the first to third rollers. , and when the disk cartridge is installed in the device, the clamper comes into contact with a predetermined fixing part provided on the device, and the first roller is pressed against the second or third roller. It is configured to rotate against pressure and release the disk from its holding state.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view of a disk cartridge according to an embodiment of the present invention. In the figure, reinforcing ribs 3 are provided radially on the upper cover 1 and the lower cover 2, respectively. 4 is a disk, 5
is a shutter.

FIG. 2 is a sectional view of the assembled disk cartridge, especially when the disk 4 is clamped. In this state, the first roller 1 provided at the tip of the disk clamper 7
1 and a second roller 6 opposing the disc 4, the disc 4 is clamped, and the inner surfaces of the upper and lower covers 1 and 2 are not in contact with the surface of the disc 4.

FIG. 3 shows a state diagram when the disk cartridge is installed in the storage/reproduction device 8. Reference numeral 9 denotes a cartridge receiving section provided in the storage/reproducing device 8, which includes a shutter opening/closing mechanism 10 and a protrusion 12 for operating a clamper.

The shutter opening/closing mechanism 10 is designed to be able to rotate in conjunction with the insertion of a cartridge. When a disk cartridge is inserted into the recording/reproducing device 8, an opening 17 formed in the end face of the shutter 5 opens into the shutter opening/closing mechanism. 10, the shutter 5 moves laterally to expose the head access hole A and the drive hole B. When the cartridge is further pushed in, the convex portion 12 provided on the side surface of the cartridge receiving portion 9 comes into contact with the end of the disk clamper 7, and the disk clamper 7 rotates clockwise in conjunction with the pushing of the cartridge. During this rotation process of the disk clamper 7, the end surface of the disk 4 slips off the tapered surfaces of the clamper roller 11 and the roller 6, and the disk 4 is held inside the cartridge.
becomes a free state. This state is shown in Figures 4 and 5.
As shown in the figure (cross-sectional view).

Thereafter, the disk 4 is fixed by a disk drive spindle 13 and a disk holder 14 provided in the recording/reproducing device 8. A cross section in this state is shown in FIG.

When the disk cartridge is taken out, the operation is the reverse of the above, and the disk holder 14 is removed and the disk 4 is removed from the disk drive spindle 13. This state is the same as that shown in FIG.

Next, when the disk cartridge is pulled out from the cartridge receiving portion 9, the disk clamper 7 operates and a rotatable clamper roller 11 provided at the tip comes into contact with the disk 4. Here, since the clamper roller 11 passes along a trajectory 18 shown in FIG. 7, a rotational force is generated on the disk 4 in the direction of the arrow 19. Further, a force in the direction of arrow 20 is also generated as a component force of the trajectory 18. Therefore, while sliding on the upper surface of the rib 3 of the lower cover 2, the disk 4 comes into contact with the clamper roller 11 of the disk clamper 7 and the rotatable roller 6 located opposite thereto, causing the roller 6 to move in the direction of the arrow 21. Generates rotational force. In this process, the disk 4 moves up the tapered surface of the roller while rotating together with the roller 6 and the clamper roller 11 without sliding, and is fixed at the position shown in FIG. 2.

In the above embodiment, in the state shown in FIG. 5, the disk 4 is supported by the convex portion 22 of the rib 3 of the lower cover 2 of the cartridge. The ribs 3 of the upper and lower covers 1 and 2 have a concave portion 16 in a portion wider than the outer diameter 15 of the recording/reproducing area of the disk 4, and a convex portion 22 in the outer portion thereof. With this configuration, the surface of the disk 4 and the rib 3
contact is prevented. Therefore, generation of dust due to abrasion caused by contact can be prevented, and a decrease in error rate can be prevented.

In this embodiment, radial ribs 3 are provided on the upper cover 1 and the lower cover 2, the outer peripheral portion of the rib 3 is raised to form a convex portion 22, and the inner peripheral portion of the rib 3 is lowered to form a concave portion 16. However, if the ribs 3 are not provided, the above recesses may be provided directly on the upper cover 1 and the lower cover 2.

〔Effect of the invention〕

As described above, according to the present invention, when the disk is not in use, the first roller presses the disk against the second or third roller.
Since the outer peripheral edge of the disk is held at the constriction near the center of the roller, it is possible to avoid a situation where the disk comes into contact with the inside of the first or second cover member. Furthermore, since the side edges of the outer periphery of the disk are held, it is possible to prevent the surface of the recording/reproducing portion of the disk from being damaged by the rollers.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a disk cartridge which is an embodiment of the present invention, Fig. 2 is a cross-sectional view of a state in which a disk is fixed within the disk cartridge, and Fig. 3 is a disk cartridge used for recording and playback. Figure 4 shows the disk cartridge inserted into the device (in the middle of insertion), Figure 5 shows the disk cartridge inserted into the recording/playback device (completed insertion), Figure 5 is a sectional view of Figure 4, and Figure 6 shows the disk with the drive spindle. FIG. 7 is a diagram showing the locus of the clamper roller in the disk cartridge and the rotation direction of the disk and roller. Explanation of symbols: 1... Upper cover, 2... Lower cover, 3... Rib, 4... Disc, 5... Shutter, 6... Roller, 7... Disc clamper,
8... Recording/reproducing device, 9... Cartridge receiving section, 10... Shutter opening/closing mechanism, 11... Clamper roller, 12... Convex portion for clamper operation, 13...
...Disk driving spindle, 14...Disc holder, 15...Outer diameter of the recording/reproducing area of the disk,
16... recess, 17... opening, 18... locus of clamper roller, 19... disk rotation direction, 2
0... Direction of component force applied to the disk, 21... Direction of rotation of the roller, 22... Convex portion.

Claims (1)

[Scope of Claims] 1. A disk drive device comprising a first and a second cover member for accommodating a disk on which information can be optically recorded or reproduced, and at least one of the first and second cover members includes: In a disk cartridge provided with a hole for rotationally driving a disk housed therein and a hole for optically recording or reproducing information on the disk, the first or second cover member At least first to third rollers are provided inside at least one cover member so as to contact the outer peripheral edge of the disk and hold the disk, and the first roller is rotatably provided on the clamper and , the second and third rollers are arranged to be rotatable around a predetermined fixed fulcrum, and the cross-sectional shape of the first to third rollers is constricted near the center and narrow at both ends. It has a structure with a thick tapered surface, and when the disk is not in use, the first roller presses the disk against the second or third roller, and the disk is placed inside the first or second cover member. Hold the outer circumferential edge of the disk at the constriction near the center of the first to third rollers so that they do not come into contact with each other, and when the disk cartridge is installed in the apparatus, The clamper is in contact with a fixed portion of the disk, and the first roller rotates against the pressure on the second or third roller, thereby releasing the disk from its holding state. disk cartridge.