JPH0621099Y2 - Disco Cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an optical disc in which an information signal is written and / or read by an information signal writing and / or reading head such as an optical pickup using a semiconductor laser. The present invention relates to a disc cartridge in which an information recording disc such as a magneto-optical disc is mounted in a recording and / or reproducing apparatus in a state of being housed in a case, and information signals can be written and / or read out in a state of being housed in the case.

[Conventional technology]

Conventionally, an optical disc has been used as a recording medium for a musical tone signal and other information signals. The writing and / or reading of the information signal with respect to the optical disc adopts an optical system in which a laser beam from an optical pickup using a semiconductor laser is irradiated. Therefore, if the signal recording surface of the optical disc is scratched or fingerprints are attached, the scratches or fingerprints may change the refractive index of the laser beam or cause unnecessary diffuse reflection, and the accurate writing of information signals. And / or reading cannot be performed.

Therefore, in order to protect the signal recording surface from scratches and adhesion of fingerprints, the optical disc is stored in a predetermined storage case.

However, as a recording and / or reproducing apparatus using an optical disc as a recording medium, a device configured such that the optical disc is mounted as a single disc is generally widely used. Therefore, in order to mount the optical disk on the recording and / or reproducing apparatus, the optical disk is grasped and taken out from the storage case for storage with fingers and then mounted on the apparatus. Therefore, during mounting operation to the recording and / or reproducing device,
Alternatively, there is a risk that the optical disc may be scratched or fingerprinted during the removal operation.

Therefore, in order to solve such a problem, there is proposed a disk cartridge capable of writing and / or reading an information signal in a state of being housed in a case without taking out an information recording disk such as an optical disk from the case. ing.

By the way, in a recording and / or reproducing apparatus using an optical disk or a magneto-optical disk as a recording medium, an optical pickup for writing and / or reading an information signal in a state where the disk is rotated at a high speed by a disk rotation driving device is provided. Information signals are written and / or written by feeding the disc in a radial direction of the disc in a non-contact state.
Or, reading is performed.

As described above, in the device for writing and / or reading the information signal by moving the optical pickup in a non-contact manner with respect to the disc while rotating the disc at a high speed by the disc rotation driving device, It is necessary to clamp so as to be integrated with the disk table of the rotary drive device and to perform accurate rotation operation in synchronization with the disk table.

Therefore, in a recording and / or reproducing apparatus in which a disc such as an optical disc is mounted as a single unit, a clamper is provided so as to face the disc table and come in contact with and separate from the disc table.

However, if a clamper is provided in the apparatus in which the information recording disc is mounted in the state of being housed in the case as described above, the clamper is moved at least including the thickness of the case and brought into contact with and separated from the disc table. become. As a result, the moving range of the clamper becomes large, and it becomes difficult to reduce the thickness of the device.

Therefore, JP-A-60-194774 discloses that a clamper for clamping an information recording disk in cooperation with a disk table in the apparatus is provided in the case of a disk cartridge without being provided on the apparatus side. Something like that is known.

[Problems to be solved by the invention]

However, the disk cartridge disclosed in the above publication is
Since the clamper is fixedly attached to the case, it cannot be applied to the one in which the clamper is provided on the recording and / or reproducing apparatus side, and lacks versatility.

Therefore, according to the present invention, the case is mounted on both the recording and / or reproducing apparatus having no clamper and the recording and / or reproducing apparatus having the clamper, and the disc is clamped to the disc table to detect the information signal. It is proposed for the purpose of providing a disc cartridge capable of writing and / or reading.

[Means for Solving the Problems] The present invention solves the problems of the above-mentioned conventional devices and achieves the above-mentioned object by performing writing and / or reading of an information signal on an information recording disk. A first half having a first opening facing a writing and / or reading head and a second opening facing a disk table of a rotary drive for rotating the information recording disk, and the first half. A second half which is rotatably provided with respect to the half and has a second opening formed in the first half and a third opening formed at a position opposite to the second opening, A case that rotatably accommodates an information recording disk, and is movable between a position where the first and second openings are closed and a position where the first and second openings are opened. It was attached to the above case A shutter,
The clamp is disposed in the third opening, the tip side of the clamp portion is projected into the case from the third opening, and is rotatably supported by the second half, and is installed in the recording and / or reproducing apparatus. A clamper that clamps the disc when mounted, and a closing member that covers the clamper disposed in the third opening and is attached to the second half to close the third opening. An engaging recess is provided on one of the peripheral edge of the third opening and the closing member, and an engaging projection is provided on the other, so that the engaging recess and the engaging projection are engaged with each other. The third opening is closed by the closing member, and the closing member is detachably attached to the second half.

[Action]

In the disk cartridge according to the present invention, the closing member detachable from the second half is removed from the second half,
By removing the clamper rotatably arranged on the second half, the information recording disk can be clamped on the disk table by mounting the case together with the recording and / or reproducing apparatus equipped with the clamper, and the closing member can be attached to the second member. By attaching to the half and leaving the clamper in the second case, the information recording disc can be clamped on the disc table by mounting the recording and / or reproducing device without the clamper.

〔Example〕

Hereinafter, specific examples of the present invention applied to a disc cartridge of an optical disc will be described.

As shown in FIG. 3, the disk cartridge according to the present invention is a so-called hard case made of a disk-shaped optical disk 1 on which a tone signal and other information signals are recorded, and a hard synthetic resin for housing the optical disk 1. And a first opening facing the optical pickup which is a writing and / or reading head for writing and / or reading an information signal to / from the optical disc 1 provided in the case 2. Opening 3 for a disc table T as a second opening facing a disc opening T for a pickup and a disc rotation driving device provided on the side of a recording and / or reproducing device for rotating the optical disc 1. The shutter 5 opens and closes the portion 4.

The case 2 includes a rectangular lower half 6 as a first half to which the opening 3 for the pickup and a central opening 4 for the disc table T are provided and a shutter 5 is attached, and the lower half 6. On the other hand, it is composed of a rectangular upper half 7 serving as a second half which is openably and closably attached.

And, in the substantially central portion of the inner main surface of the lower half 6,
A storage recess 8 having a depth enough to store the optical disk 1 is formed so as to be inscribed in the lower half 6. A central opening 4 for the disc table T is formed in the central portion of the storage recess 8, and the optical disc 1 stored in the storage recess 8 is located at a substantially central position in the lateral direction which is the width direction of the lower half 6. An opening 3 for pickup is formed continuously with the central opening 4 toward the front side surface of the lower half 6 in a portion of the signal recording area 1a extending in the radial direction. The opening 3 is formed as a large size having a width of about 1/3 of the width of the case 2 so that a large-sized optical pickup can approach the size of the size of the optical disc 1. Then, in the lower half 6, the shutter 5 is movable between a position where the opening 3 for the pickup and the central opening 4 for the disc table T are closed and a position where the openings 3 and 4 are opened. Is installed.

As shown in FIGS. 2 and 3, the shutter 5 has a substantially rectangular shutter portion 9 formed to a size large enough to close the opening 3 and the central opening 4 for the pickup, and this shutter portion. The slide guide portion 10 has a U-shaped cross section and is provided integrally with the base end portion of the slide guide portion 9. The slide guide portion 10 is formed to be sufficiently longer than the width of the shutter portion 9 so as to project to the side of the shutter portion 9, and moves in the width direction narrower than the length in the longitudinal direction. The shutter 5 is formed so as to be stably moved. Further, the slide guide portion 10 is provided continuously with the front wall 11 formed upright from the base end portion of the shutter portion 9 and is continuously provided on the front wall 11 so as to face the shutter portion 9 in parallel with each other and to have a guide rail locking piece at the tip thereof. The slide guide wall 13 is formed by bending 12 and a supporting piece 14 continuously provided on the front wall 11 so as to face the slide guide wall 13 at an end portion protruding from the shutter portion 9. It is formed in a letter shape. In the shutter 5 provided with the slide guide portion 10 formed in this way, the slide guide portion 10 is engaged with the shutter mounting portion 15 formed on the front side surface side of the lower half 6 so that the opening 3 for the pickup and It is movably mounted between a position where the central opening 4 is closed and a position which reaches one side of the lower half 6 where the opening 3 for pickup and the central opening 4 are opened. That is, the shutter mounting portion 15 has a first guide rail 16 which is located on the inner main surface of the lower half 6 and serves as a front side wall of the case 2, and a shutter opening / closing provided on the recording and / or reproducing apparatus side. A second guide rail 17 serving as a shutter opening / closing pin restriction wall that restricts the pin insertion position is provided in parallel. In the shutter 5, the shutter portion 9 extends on the outer main surface of the lower half 6, and the guide rail locking piece 12 of the slide guide portion 10 is engaged with one side surface of the first guide rail 16. The shutter mounting portion 1 includes the base end portion of the shutter portion 9 and the slide guide portion 10.
5 is attached so as to sandwich the above-mentioned first and second
The positions shown in FIG. 2 in which the pickup opening 3 and the central opening 4 are closed by being guided by the guide rails 16 and 17 and the opening 3 and the central opening 4 for the pickup are opened in FIG. Mounted for movement between the positions shown. It should be noted that the front end side of the shutter portion 9 is held at the front end portion of the shutter portion 9 and a locking claw 18 formed by cutting and raising one side of the front end portion while sandwiching one side edge of the central opening portion 4 during a moving operation. It is designed so as to prevent the lift-up in the etc.

In addition, the shutter 5 pulls the spring 1 in a direction to close the opening 3 for pickup and the central opening 4.
It is provided on the recording and / or reproducing device side provided on the slide guide portion 10 as shown in FIGS. 2 and 5 at a position where it is biased by 9 and closes the opening 3 for pickup and the central opening 4. A lock piece 21 is engaged and locked to the notch opening 20 into which the shutter opening / closing pin is inserted and engaged. Then, the tension spring 19
Is accommodated in a spring accommodating portion 22 formed between the first and second guide rails 16 and 17, and one end of which is erected on one side of the lower half 6 inside the spring accommodating portion 22. 23, and the other end of the slide guide 10
The shutter 5 is attached to the other end of the rising wall 11 by being bent so as to be locked, and urges the shutter 5 in a direction to close the opening 3 for pickup and the central opening 4.
Further, the cutout opening 20 is provided on one end side of the slide guide portion 10 protruding from the shutter portion 9 and is formed from the rising wall 11 to the slide guide wall 13, and the lock piece 21 is shown in FIG. As shown in FIG. 5, the shutter 5 is provided so as to engage with the cutout opening portion 20 when it reaches a position where it closes the opening portion 3 and the central opening portion 4 for pickup, and on the front side surface side of the shutter 5. Therefore, it is provided on one side of the lower half 6. The lock piece 21 is elastically deformable inwardly of the lower half 6 when pressed by a shutter opening / closing pin inserted into and engaged with the cutout opening 20 from the front side surface of the shutter 5. 6 is provided in parallel with the front side surface of the lower half 6 and the locking claw portion 25 formed on the free end side is inclined toward the front surface side of the lower half 6 and the notch opening portion 20 is released when the pressing by the shutter opening / closing pin is released. Is adapted to engage with.

In this way, the shutter 5 attached to the lower half 6 is
When the disc cartridge is mounted on the recording and / or reproducing device, the lock is released by a shutter opening / closing pin provided on the device side which inserts into and engages with the cutout opening 20, and the shutter opening / closing pin opens the pickup opening 3 And the central opening 4 is opened in a direction to open the central opening 4 against the urging force of the tension spring 19, and as shown in FIG.
Open up.

By the way, the side half wall portion 26 of the lower half 6 on one side orthogonal to the moving direction of the shutter 5 draws in and / or the disk cartridge provided in the recording and / or reproducing apparatus in which the disk cartridge is mounted. A rack gear portion 27 with which a gear such as a pinion gear of a loading mechanism for pulling out meshes is provided as shown in FIG. The rack gear portion 27 is formed on the lower end surface of the side wall portion 26 on the one side from the front side surface side of the lower half 6 to the rear surface side surface side. That is, the tooth portions of the rack gear portion 27 are provided so as to face the main surface of the lower half 6 on the lower surface side.

Further, as shown in FIG. 2, the side wall portion 28 on the other side of the lower half 6 facing the side wall portion 26 on the one side is prevented from erroneous insertion of a disc cartridge provided on the recording and / or reproducing apparatus side. A groove 29 for preventing erroneous insertion with which the guide piece engages is provided.

As described above, the upper half 7 is openably and closably attached to the lower half 6 to which the shutter 5 is attached so as to close the accommodating recessed portion 8 provided in the lower half 6 so that the optical disc 1 to be accommodated can be exchanged. There is. The upper half 7 is formed as a rectangular plate-like body corresponding to the portion of the lower half 6 in which the storage recess 8 is provided, and includes a pair of rotating protrusions 31, 32 protruding on both sides on the base end side. Rotating shaft 3 projecting from opposite surfaces
3, 33 are fitted into fitting holes 35, 35 provided at positions corresponding to both sides of the shutter mounting portion 15 on the front side of the both side wall portions 26, 28 of the lower half 6 to fit the lower half 6 Can be opened and closed freely. In addition, on both sides of the tip surface of the upper half 7, when they are closed, the engagement pieces 3 that engage with the engagement recesses 36, 36 formed on both sides of the front surface of the lower half 6 are formed.
7, 37 are provided to prevent accidental opening of the lid. Further, on both sides on the tip side of the upper half 7, the engaging pieces 37, 37 are orthogonal to the engaging pieces 37, 37 and engage with the engaging step portions 38, 38 formed on both sides on the front side of the lower half 6. Joint walls 39, 39 are provided so as to prevent positional displacement in the left-right direction at the time of blockage.

Further, at the position in the center of the upper half 7 that faces the center hole 1a of the optical disk 1 housed in the housing recess 8 and the position that faces the central opening 4, the disk cartridge is recorded and / or recorded. Alternatively, a clamper 41 that clamps the optical disk 1 in cooperation with a disk table T of a disk rotation driving device provided on the apparatus side when mounted on a reproducing apparatus is detachably attached.
This clamper 41 records and / or records as shown in FIG.
Alternatively, a clamp that is attracted to the disk table T formed of a magnetic material of the disk rotation driving device provided on the reproducing apparatus side and clamps the optical disk 1 mounted on the disk table T in cooperation with the disk table T. It is composed of a ring-shaped magnet 40 as a part and a mounting plate 41a made of a thin disk-shaped metal plate for joining and supporting the magnet 40 on one side surface.

The clamper 41 configured by joining the magnet 40 to one side surface of the mounting plate 41 has the central opening 4 of the upper half 7.
A clamper holding plate 43 as a third opening, which is detachably attached to the clamper attaching hole 42 as a third opening, and closes the clamper attaching hole 42. The peripheral edge of the mounting plate 41a is supported between the clamper support rings 44 made of plates and mounted as shown in FIG.

The pair of arc-shaped engaging pieces 45, 45 and 46, 46 protruding from the outer peripheral edges of the clamper pressing plate 43 and the clamper supporting ring 44 are fitted to the inner peripheral surface of the clamper mounting hole 42. A fitting groove 47 is provided. The fitting groove 47 is formed on the inner surface of the upper half 7 by the engaging pieces 45, 4 of the clamper pressing plate 43 and the clamper supporting ring 44.
5 and 46, a pair of notches 48 sufficient to insert 46,
48 is provided, and the portions where these notches 48, 48 are not formed are the locking pieces 49, 49 of the engaging pieces 45, 45 and 46, 46. Further, locking piece portions 50, 50 are provided at portions of the outer side surface of the upper half 7 of the fitting groove 47 corresponding to the cutout portions 48, 48, and portions corresponding to the locking piece portions 49, 49. Notch recesses 51, 51
Is provided. Further, a rotation restricting portion is provided at a portion where one notch recess 48 on the inner side surface of the upper half 7 and one notch recess 51 on the outer side surface are continuous. The clamper pressing plate 43 and the clamper supporting ring 44 sandwich the mounting plate 41a on which the magnet 40 is mounted, and sandwich the engaging pieces 45, 45 and 46, 46 on the inner surface side of the upper half 7 by notches. Fitting in the fitting groove 47 corresponding to 48, 48, and then rotating the engaging pieces 45, 45 and 46, 46 so as to engage the locking piece portions 49, 49, and restricting rotation. When the engaging pieces 45 and 46 are rotated until one ends thereof come into contact with each other, the clamper 41 is attached to the upper half 7 as shown in FIG.

That is, the clamper 41 projects the magnet 40 into the case 1 from the central opening of the clamper support ring 44, and the peripheral edge of the mounting plate 41a is clamped by the clamper support ring 4 described above.
4 and is arranged in the clamper mounting hole 42 of the upper half 7.

By the way, rising peripheral walls 53 and 54 are provided on the peripheral edges of the clamper pressing plate 43 and the clamper support ring 44, respectively, and the engaging pieces 45, 45 and 46, 46 are provided on the lower end side peripheral edges of the rising peripheral walls 53 and 54. ing.
Therefore, when the clamper pressing plate 43 and the clamper supporting ring 44 are attached to the fitting groove 47 so that the engaging pieces 45, 45 and 46, 46 are abutted with each other, as shown in FIG. A mounting space 55 for the clamper 41 is formed with a gap large enough for the peripheral edge of 41a to be loosely fitted and supported. Therefore, the clamper 41 can be moved in the thickness direction of the upper half 7, that is, can be moved up and down, and can be held in the mounting space 55 when the optical disc 1 is clamped in cooperation with the disc table T in the apparatus. Of the clamper pressing plate 43 and the clamper supporting ring 44,
Also, it can rotate integrally with the disc table T without contacting the clamper support ring 44 and the like.

Further, the clamper pressing plate 43 and the clamper support ring 44 are rotated in a direction opposite to the direction of engagement with the fitting groove 47 described above so that the engaging pieces 45, 45 and 46, 46 are brought into contact with the fitting groove 4.
It can be removed from the upper half 7 by making it correspond to the cutouts 48, 48 of 7. Then, the clamper 41 can be detached, the clamper mounting hole 42 in the portion facing the central opening 4 of the lower half 6 is opened, and the clamper provided in the recording and / or reproducing apparatus can enter the case 2. .

In the above-described embodiment, the example in which the magnet 40 is used for the clamp portion of the clamper 41 has been described, but in the disc cartridge mounted on the device in which the magnet is provided on the disc table T side, the clamp portion is not provided. Alternatively, it may be simply formed of a magnetic material. That is,
The clamp portion can be variously modified according to the disc table T.

[Effect of device]

As described above, the disc cartridge according to the present invention is a recording and / or reproducing apparatus provided with a clamper by removing the closing member detachably attached to the second half and removing the clamper from the second half. The information recording disc can be clamped to the disc table by mounting it together with the case, and the information recording disc can be clamped to the disc table by mounting the recording and / or reproducing device without the clamper by keeping the clamper attached. be able to.

Therefore, the disc cartridge according to the present invention can be mounted on the recording and / or reproducing device, which has no clamper on the device side and which has the clamper on the device side, together with the case to clamp the disc to perform the information signal. Can be written and / or read.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line I-I of FIG. 3 showing a clamper attached state, FIG. 2 is a perspective view from the lower surface side of a disc cartridge according to the present invention, and FIG. 3 is the disc cartridge. 4 is an exploded perspective view of the disc cartridge from the lower side with the shutter of the disc cartridge open, and FIG. 5 is a plan view of the disc cartridge with the shutter closed. FIG. 6 is an exploded perspective view of a mounting portion of the clamper. DESCRIPTION OF SYMBOLS 1 ... Optical disk 2 ... Case 3 ... Pickup opening 4 ... Central opening 5 ... Shutter 6 ... Lower half 7 ... Upper half 40 ... Magnet 41 ... Clamper 42 ... Clamper mounting hole 43 ... Clamper holding plate 47 ... Fitting groove 55 ... Installation space

Claims (1)

[Scope of utility model registration request] 1. A first opening facing a writing and / or reading head for writing and / or reading an information signal on an information recording disk and a disk table of a rotary drive device for rotating the information recording disk. A first half having a second opening formed therein, and a position rotatably provided with respect to the first half and facing a second opening formed in the first half. A second half having a third opening formed therein, and a case in which the information recording disk is rotatably accommodated; a position in which the first and second openings are closed; And a shutter attached to the case so as to be movable between a position where the second opening is opened and a position where the tip of the clamp part is provided in the third opening. Side into the case A clamper which is rotatably and rotatably supported by the second half and clamps the disc when mounted in the recording and / or reproducing apparatus, and covers the clamper disposed in the third opening. A closing member attached to the second half to close the third opening, and an engaging recess is provided in one of the peripheral portion of the third opening and the closing member and the other is engaged with the other. Providing a collision part,
By engaging the engaging recess and the engaging protrusion, the closing member closes the third opening, and the closing member is detachably attached to the second half. Disk cartridge.