KR940009730B1 - Disc cartridge - Google Patents

Abstract

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Description

[Name of invention]

Disc cartridge

[Brief Description of Drawings]

1 is a perspective view showing a lower half of the disk cartridge constituting the disk cartridge according to the present invention.

2 is an overall perspective view of the disc cartridge.

3 is a partially enlarged cross-sectional view of the disc cartridge.

4 is a circular disk support member used in the present invention, where FIG. 4A is a top side perspective view thereof, and FIG. 4B is a bottom side perspective view.

Fig. 5 shows a rectangular disk support member used in the present invention, in which Fig. 5a is an upper side perspective view, and Fig. 5b is a bottom side perspective view.

6 is a cross-sectional view of a state in which the disc support member is disposed on the inner circumferential side concave support portion.

7 is a cross-sectional view of a state in which the disc support member is disposed on the outer circumferential side concave support portion.

8 is a perspective view showing another example of the seek support member.

9 is a sectional view showing still another example of the disk support member.

10 is a sectional view showing still another example of the disk support member.

FIG. 11 shows another example of a circular disk support member used in the present invention, in which FIG. 11A is a top side perspective view thereof, and FIG. 11B is a bottom side perspective view.

12 is another example of a rectangular disk support member used in the present invention, in which FIG. 12A is a top side perspective view thereof, and FIG. 12B is a bottom side perspective view.

13 is a plan view of a state in which the disk support member shown in FIG. 11 is disposed on an inner circumferential side concave support portion.

14 is a cross-sectional view of FIG. 13.

FIG. 15 is a plan view of a state in which the disk support member shown in FIG. 11 is disposed on an outer circumferential side concave support portion. FIG.

16 is a cross sectional view of FIG. 15;

FIG. 17 is a plan view of a state in which the disk support member shown in FIG. 12 is disposed on the inner circumferential side concave support portion. FIG.

Detailed description of the invention

[Technical Field]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge formed by rotatably storing a disc such as an optical disc capable of recordable recording.

[Background]

Conventionally, discs such as optical discs capable of additional recording can be used to prevent writing or reading errors of information signals resulting from contamination damage caused by adhesion of dust, damage from contact with others, etc., when not used in a recording and reproducing apparatus. For that purpose, the cartridge is housed in a predetermined cartridge. As a cartridge of this type, as disclosed in Japanese Patent Application Laid-Open No. 61-3015, an opening portion is provided on the upper and lower double-sided plates (to face the chucking portion provided at a part of the signal recording portion of the disk housed in the cartridge and at the rotational center). At the same time, in the cartridge, at least the signal recording portion of the disk is integrally formed to protrude a disk support rib so as not to contact the inner wall of the cartridge, and the ribs are configured to support the disk in the non-signal recording portion. have.

In the conventional disc cartridge configured as described above, there is no buffering effect on the disc in supporting the disc by ribs integrally provided in the cartridge, and there is a fear of damaging the disc when an impact is applied during transportation or the like. have. Therefore, if a shock absorbing member having elasticity such as a rubber plate is placed on the inner surface of the cartridge and the disk is supported by the shock absorbing member, damage caused by the above-described shock can be prevented, but it is bent when the load of the disk is applied. When the disk is attracted to the buffer member and mounted on the recording and reproducing apparatus, there is a possibility that the smooth starting of the rotation may not be possible. In particular, the adsorption phenomenon becomes remarkable when the buffer member is formed of a sufficiently flexible silicone rubber or the like to increase the buffer effect.

[Initiation of invention]

According to the present invention, even when the support member is made of silicone rubber or the like having sufficient flexibility and high buffering effect in supporting the disc in the cartridge, the disc and the disc support member are not adsorbed and are mounted on the recording and reproducing apparatus. It is an object of the present invention to provide a disc cartridge which enables a smooth rotational start of the disc when the rotary operation is performed, and in which the disc support member is fixedly and securely attached.

A disc cartridge according to an embodiment of the present invention is a disc cartridge in which a disc (5) in which an information signal is recorded is rotatably received in a cartridge (4), wherein a ratio between an inner circumferential side portion and an outer circumferential side portion of the disc 5 is provided. The disk support members 25, 26 or 35, 36 formed on the inner wall surface of the cartridge 4 corresponding to the signal recording section by providing the suction prevention section 27 or 37 on the disk storage surface side are bonded or caulked. It is fixed, and it is comprised so that the said disk 5 may be supported by this disk support member 25, 26, or 35, 36.

According to the present invention, since the disk 5 housed in the cartridge 4 is supported by the disk support members 25, 26 or 35, 36 formed by providing the suction prevention portion 27 or 37 on the disk storage surface side, While the disk 5 is effectively prevented from being damaged by the impact, the suction member 27 or 37 is prevented even if the disk supporting members 25, 26 or 35, 36 are bent under the load of the disk 5. Suction is prevented, and the disc support members 25, 26 or 35, 36 are reliably adhered to the inner wall of the cartridge 4 without bleeding, or stably fixed by caulking. do.

Best Mode for Carrying Out the Invention

Hereinafter, an embodiment of the disc cartridge of the present invention will be described with reference to FIGS.

In the disc cartridge according to the present invention, as shown in Figs. 1 and 2, the upper half body 1 and the lower half body 2, which have a rectangular shape, are brought into contact with each other and are fixed by a plurality of screws 3. In the cartridge 4, a disk-like disk 5 such as an optical disk capable of additional recording is rotatably housed. In addition, at the center of the upper and lower half bodies 1 and 2 constituting the cartridge 4, a chucking mechanism insertion hole for facing outward the chucking hub 6 provided at the center of the disk 5 accommodated therein ( 7, 8 are formed respectively, and the signal recording portion of the disk 5 faces outwardly in the radial direction over the front edge portion at predetermined intervals from the insertion holes 7, 8, and the disk 5 Openings 9 and 10 facing the information signal writing and reading means such as an optical pickup for writing a predetermined information signal and reading out the written information signal are formed.

The cartridge 4 is also provided with a sliding shutter 11 for opening and closing the chucking mechanism insertion holes 7 and 8 and the openings 9 and 10. The shutter 11 is formed by bending a metal plate such as a thin stainless steel plate in a U-shape, and is arranged to fit on an outer surface of the cartridge 4, and transversely between the front edges of the cartridge 4. It is fixed to the slide base 12 which is slidably slidable, and is slidably attached to the chucking mechanism insertion holes 7 and 8 and the openings 9 and 10 together with the slide base 12. The slide base 12 to which the shutter 11 is fixed is a pinion gear 15 that is electrically engaged between the first rack gears 13 and 14 formed on one inner side of the slide base 12. By means of the torsion spring 16 through the interlocking mechanism, the shutter 11 is always biased in the direction of opening and closing the chucking mechanism insertion holes 7 and 8 and the openings 9 and 10.

In addition, the lower body 2 constituting the cartridge 4 has a locking member 17 which fixes the shutter 11 in the closed position when the shutter 11 is in the closed position. It is attached corresponding to the closed end.

By the way, the inner circumferential side non-signal recording section of the disk 5 in the inner circumferential side region surrounding the chucking mechanism insertion holes 7 and 8 on the inner wall surfaces of the upper and lower half bodies 1 and 2 constituting the cartridge 4. Corresponding to (5a), the frame ribs 18 forming a plurality of circles and the frame ribs 19 forming a rectangular shape are protruded at predetermined intervals in the circumferential direction to form inner circumferential side concave supports 20 and 21. In the outer peripheral side region, which is a position corresponding to the circumferential surface where the arc-shaped ribs 23 constituting the disk accommodating portion 22 are provided. Corresponding to the outer circumferential side non-signal region 5b of the disk 5, the outer circumferential side concave support portion 24 forming a plurality of circles is formed in a spot facing shape.

Then, as shown in FIG. 4, a circular disk support member 25 formed in a circular shape is inserted into the inner circumferential side concave support portion 20 and the outer circumferential side concave support portion 24, and the inner circumferential side concave forming a rectangle. As shown in FIG. 5, a disc support member 26 formed in a rectangular shape is fitted to the support portion 21. As shown in FIG. These disk support members 25 and 26 are formed of silicone rubber with sufficient elasticity, and the top surface serving as the disk storage surface of the disk support members 25 and 26 has a checkered rough surface forming a fine concave-convex shape. The suction prevention part 27 comprised is provided. That is, since the suction preventing portion 27 is a checkered rough surface forming a fine yogur shape, the disk receiving surface and the disk when the disk 5 is placed on the disk receiving surfaces of the disk supporting members 25 and 26. (5) The adhesiveness of the surface is impaired.

In addition, the disk support members 25 and 26 are formed in a substantially cup shape so that the peripheral walls 25a and 26a are provided so as to vertically fall to the periphery and the recesses 25b and 26b for filling the adhesive are formed on the rear surface side. . The peripheral walls 25a and 26a are provided with a plurality of grooves 25c and 26c for excessive adhesive escape filling the recesses 25b and 26b over the inner and outer circumferences.

The disk support members 25 and 26 formed as described above are formed slightly thicker and slightly smaller than the depths of the inner circumferential concave support 20 and the outer circumferential concave support 24, and are fitted to the respective support parts 20 and 24. When arrange | positioned, the upper surface used as a disk accommodating surface protrudes from the said support parts 20 and 24, and a micro clearance gap is formed between the inner peripheries of the peripheral walls 25a and 26a. Each of the disk support members 25 and 26 formed as described above is in the state in which the silicone adhesive 28 is filled in the adhesive filling recesses 25b and 26b with respect to the respective inner peripheral recessed supports 20 and 21, respectively. It is inserted and inserted, and is adhered by the adhesive 28 to the bottom surfaces of the respective support portions 20 and 21 as shown in FIG. Moreover, also about the outer peripheral side recessed support part 24, the said disk support member 25 is similarly inserted in the state which filled the silicone adhesive 28 with the adhesive filling recessed part 25b, and is shown in FIG. As described above, the bottom surface of the support part 24 is bonded by the adhesive 28. Since the peripheral walls 25a and 26a of the disk support members 25 and 26 are provided with a plurality of grooves 25c and 26c for excessive adhesive escape over the inner and outer circumferences, the recesses 25b and 26b. Is absorbed by the excess adhesive escape grooves 25c and 26c even when the adhesive is filled in a small amount, and the disk support members 25 and 26 are formed smaller than the angled groove supports 20, 21 and 24. By doing so, the adhesive 28, which has not been absorbed in the excess adhesive escape grooves 25c, 26c, is absorbed in the gap between the recessed supports 20, 21, 24, and exudes to the inner surface side of the cartridge 4 This prevents contamination of the disks and the like.

As described above, the disc support members 25 and 26 that are inserted into and disposed in the concave support portions 20, 21 and 24 are thicker than the depths of the retaining portions 20, 21 and 24, as shown in FIG. Similarly, the upper disk support surface is in a protruding state. In addition, the inner circumferential side concave support portions 20 and 21 are formed by protruding the frame ribs 18 and 19 from the inner wall surfaces of the upper and lower half bodies 1 and 2, and the outer circumferential side concave support portions 24 are the upper and lower half bodies ( Since the inner wall surface of 1,2) is formed in the shape of spot facing, there exists a difference in the ground height. Therefore, the disk support surfaces of the upper surfaces of the disk support members 25 and 26 formed with the same thickness are high on the inner circumferential side and low on the outer circumferential side. Accordingly, the disk 5 housed in the cartridge 4 is engaged by the disk support members 25 and 26 on the inner circumference side in the unused state where the disk table is not chucked to the recording and reproducing apparatus as shown in FIG. Will be touched and supported. In the case where the disk 5 is warped, the outer circumferential surface is abutted and supported by the disk support member 25 on the outer circumferential side, thereby suppressing the warp.

In this embodiment, the suction preventing portion 27 is provided by forming a rough surface in the shape of a checkered pattern on the disk receiving surfaces on the upper surfaces of the disk supporting members 25 and 26, but the suction preventing portion 27 is the disk receiving surface. Adhesion between the disk and the disk 5, for example, the disk 5 is placed on the disk storage surface and the disk storage surface side is bent, thus preventing the suction plate structure from being formed between the disk 5 surface and the disk storage surface. Any structure may be used. For example, as shown in FIG. 8, a suction prevention portion for drilling a groove radially from the center to the disk receiving surface of the upper surface of the disk supporting member 25 to prevent adhesion between the disk 5 and the adhesion by suction ( 27, or as shown in Fig. 9, a projection preventing portion radially protrudes from the center on the disk receiving surface of the upper surface of the disk supporting member 25 to be the suction preventing portion 27 having the same function. Further, the cut groove and the protrusion may be formed in a spiral shape. Furthermore, as shown in FIG. 10, the center portion of the disk receiving surface on the upper surface of the disk support member 25 is protruded and formed so as to protrude in advance, and the support leg piece 30 is disposed on the lower surface side in correspondence with the expanded protruding position. Protrudingly provided, the disk 5 may be placed on the disk storage surface to prevent the disk storage surface from being bent, and may be a suction prevention unit 27.

Next, another embodiment of the disc support member will be described with reference to FIGS. 11 to 17.

11 is a circular disk support member 35 which is fitted to the inner circumferential side concave support part 22 and the outer circumferential side concave support part 24 which form a circle of the upper and lower half bodies 1 and 2 similarly to the above-mentioned embodiment. In addition, FIG. 12 shows a rectangular disk support member 36 interposed between the inner circumferential concave support portion 24 forming an upper shape, and these disk support members 35 and 36 are also formed with silicone rubber. On the upper surface serving as the disk storage surface, a suction prevention portion 37 having a rough surface of a checkered pattern, which becomes a fine concavo-convex shape, is provided as in the above-described embodiment.

And a pair of horizontal leg parts 38 and 39 are integrally formed in the peripheral surface, and the attachment holes 38a and 39a are drilled in the horizontal leg parts 38 and 39, and they are formed to face each other in the radial direction. In addition, in the rectangular disk support member 36, they are formed to face each other in the longitudinal direction.

In the circular disk support member 35, the horizontal leg portions 38 and 39 have a plurality of grooves 35c and 36c for excessive adhesive escape over the inner and outer circumferences of the peripheral walls 35a and 36a. The legs 38 and 39 have a thickness of approximately half of the peripheral walls 35a and 36a, and are integrally formed to be flush with the lower surfaces of the peripheral walls 35a and 36a.

A pair of pins penetrating into the mounting holes 38a and 39a of the horizontal leg portions 38 and 39 in each of the concave support portions 20, 21 and 24 provided with the disk support members 35 and 36 formed as described above. (40, 41, 42) are protruded.

That is, in the circular inner circumferential side concave support portion 20 as shown in FIGS. 13 and 14, the horizontal leg portion of the disk support member 35 with respect to the radial direction of the shape rib 18 is formed. A pair of cutouts 38a, into which the 38 can be fitted, are formed and positioned approximately in the center of the handover cutouts 18a to protrude and install the pins 40, and as shown in FIG. In the inner circumferential side concave support portion 21, an extension portion 19a into which the horizontal leg portion 39 of the disc support member 36 is fitted is formed at both ends in the longitudinal direction of the rectangular frame rib 19 forming the same. The pins 41 protrude from these two extending portions 19a. On the other hand, in the circular outer circumferential side concave support portion 24, a pair of concave portions 24a into which the pair of horizontal leg portions 38 of the disc support member 35 are fitted are formed facing the radial direction of the circular spot facing portion. The pins 42 protrude from both recesses 24a.

The circular disk support member 35 is inserted into the circular inner circumferential side concave support portion 20 and the outer circumferential side concave support portion 24 formed as described above, and at the same time, the attachment hole 38a of the horizontal leg portion 38 is provided. Is inserted into the pins 40 and 42 to caulk the tip portions of the pins 40 and 42, and the rectangular inner disk support member 36 is inserted into the rectangular inner circumferential side concave support portion 21, and at the same time horizontally The disk support member is fixed to each of the concave supports 20, 21, and 24 by caulking the tip of the pin 41 by inserting the attachment hole 39a of the leg 39 into the pin 41. do.

And also in this embodiment comprised in this way, the disk support surface of the upper surface of each disk support member 35 and 36 is projecting from each recess support part 20, 21 and 24, and it is high on the inner peripheral side, and is outer periphery. It is in a low state from the side.

In addition, the fixed attachment to each of the recess support portions 20, 21, and 24 of the disc support members 35, 36 is similar to the above-described embodiment. Can be adhered to by the adhesive 28, in which case excess adhesive is absorbed in the grooves 35c and 36c, where the unabsorbed adhesive 28 is the gap in the concave supports 20, 21 and 24. Is absorbed from.

As described above, in the present embodiment, there are three methods of fixing and attaching each of the disk support members 35 and 36: coking by pins 40, 41 and 42, adhesion by adhesive 28, and coking and bonding. If possible, each disc support member 35,36 is further provided with respect to each concave support 20, 21, 24, in particular by using coking with pins 40, 41, 42 and bonding with adhesive 28 in combination. It can be fixedly attached and the disk 5 can be supported more stably.

In addition, in this embodiment, the suction prevention portion 37 of each of the disk support members 35 and 36 can be configured in the shape as shown in FIGS. 8 to 10 described above, and the horizontal leg portion ( 38 and 39 are not limited to one pair, but may be fixed or attached by caulking at three or more places by forming over three or more perimeters.

As described above, in the present embodiment, the disc support members 35 and 36 are fixedly attached to the concave supports 20, 21 and 24 by caulking by pins 40, 41 and 42. Fixed attachment can be maintained stably over a long period of time, especially when fixed attachment only by caulking can secure the height of the disk support surface, and thus the disk 5 can be uniformly stabilized and supported. There is this.

As mentioned above, the present invention is not limited to the above-described embodiment, and various other configurations can be taken without departing from the gist of the present invention.

According to the present invention, it is stably supported by a support member that is sufficiently flexible when the disc housed in the cartridge is not in use, and the suction member is provided on the disc receiving surface of the recess support member support member so that the support member is affected by the load of the disc. Even if bent, suction is prevented by the suction preventing portion and adhesion of the disc supported by the support member does not occur. Thus, a disc cartridge is provided that enables smooth rotational start of the disc when the disc is mounted on the recording and reproducing apparatus to perform a rotation operation. can do.

In addition, since the support member is reliably and securely attached to the inner surface of the cartridge half body, the disk can be stored safely for a long time, and further, a cartridge can be provided that does not cause damage to the disk even during transportation.

Claims (10)

And a pair of upper and lower cartridge halves 1, 2, and the recording / reproducing disk 5 is rotatably housed, and at the position corresponding to the non-recording signal portions 5a, 5b of the inner and outer circumferences of the disk. The support members 25, 25; 35, 36 are fixedly attached to the inner surface of the cartridge half body, and the disc is not supported when the support members 25, 25, 35, on the cartridge half body 1, 2 side. In the disc cartridge 4 abutted against and supported by 36, the support members 25, 25; 35, 36 are each made of silicone rubber, and disc suction prevention portions 27, 37 are provided on the disc receiving surface. The cartridge characterized in that. The concave support portion (20, 24) is formed in a position corresponding to the non-recording signal portions (5a, 5b) of the inner and outer circumferences of the disk (5) on the inner surface of the cartridge half (1, 2). A disk cartridge, characterized in that. 3. A disc cartridge according to claim 2, wherein said support member (25, 26; 35, 36) is fixed to protrude slightly than said support (20, 24). 2. A pair of pins (40) according to claim 1, wherein a pair of leg portions (38, 39) having attachment holes (38a, 39a) are formed in said support member, and said attachment holes (38a, 39a) have a pair of pins (40) formed in said support portion. And 41 and 42, wherein the upper end of the pin is fixed to attach the support member to the support portion. The disk cartridge according to claim 1, wherein the disk suction prevention part (27) is manufactured to have a rough surface. A disk cartridge according to claim 1, wherein said disk suction prevention section (27) is a radial groove. The disk cartridge according to claim 1, wherein the disk suction prevention section (27) is a radial rib. 2. The disc cartridge according to claim 1, wherein the disc suction prevention section (27) is a projection projecting from the center portion to the peripheral portion. The support member (25, 26; 35, 36) has recesses (25b, 26b; 35b, 36b) on the back surface side, and filling the adhesive portion 28 with the adhesive (28). A disk cartridge, characterized in that fixedly attached to the (20, 21, 24). 10. The grooves (25c, 26c; 35c, 36c) of the support members (25, 26; 35, 36) are provided outward from the recesses (25b, 26b; 35b, 36b). Disk cartridge.

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