JPH08106691A - Disk reproducing device - Google Patents

Abstract

PURPOSE: To eliminate a dedicated member required for fitting a clamper and to miniaturize the whole device with thin formation and also to simplify fitting work of the clamper. CONSTITUTION: A clamper fitting part 25 for freely rotatively holding the clamper 60 is provided integrally with a frame 20 molded of a resin on the disk reproducing device, thus eliminating any dedicated member required for fitting the clamper 60 and miniaturizing and thinning the whole device in size. Then, a pawl part 26 for pressing the clamper 60 from the side of the surface of the frame 20 in this clamper fitting part 25 is elastically deformable by pressing of the clamper 60 at the time of its fitting. Consequently, the clamper 60 can simply be fitted to the clamper fitting part 25 only by pusHing in the clamper 60 from the surface side of the frame 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus such as a CD (compact disc) player and a CD-ROM drive.

[0002]

2. Description of the Related Art In recent years, a disc reproducing apparatus using an optical disc as a recording medium has become smaller and lighter, and along with this, a disc reproducing apparatus such as a CD-ROM drive incorporated in a computer has been actively developed. There is. For example, there is a disc reproducing device or the like configured such that a tray on which an optical disc is mounted can be horizontally taken in and out from a cabinet having a built-in optical pickup, a disc driving mechanism section, and the like.

In such a tray horizontal loading type disc reproducing apparatus, in order to avoid interference between the tray and the optical pickup or the disc driving mechanism when the tray is taken in and out, the optical pickup and the optical pickup and the disc drive mechanism are interlocked. A mechanism is provided for raising and lowering the unit integrally mounted with the disk drive mechanism section with respect to the height position of the tray.

FIG. 19 is a view showing a mounting structure of a clamper for sandwiching an optical disk with a turntable in such a tray horizontal insertion / removal type disk reproducing apparatus.
As shown in the figure, conventionally, the clamper 91 has a pickup unit 92 equipped with an optical pickup (not shown).
Was mounted on a clamper mount 93 rotatably provided on one end of the shaft via a shaft 95. This clamper 91
As shown in FIG. 20, a magnet 94 is sandwiched between two plate members 91a and 91b, and the optical disc can be sandwiched by magnetic coupling with a turntable. The clamper 91 is formed by sandwiching the mounting base 93 between the upper and lower plate members 91a and 91b.
It is attached to 3.

[0005]

However, in such a clamper mounting structure, the pickup unit 9 is used.
Since it is necessary to provide the clamper mounting base 93 to the second device, it is difficult to make the device thin. Further, in order to mount the clamper 91 on the clamper mounting base 93, the plate members 91a and 91b of the clamper 91 are mounted on the clamper mounting base 93. It was necessary to sandwich them and put them together from above and below, and the assembly work was troublesome.

DISCLOSURE OF THE INVENTION The present invention has been made to solve such a problem, and eliminates the dedicated member required for mounting the clamper, thereby making the entire apparatus compact and thin, and further simplifying the clamper mounting work. The purpose is to provide a playback device.

[0007]

In order to achieve the above-mentioned object, a disk reproducing apparatus of the present invention has a mechanical unit equipped with a disk drive mechanism including a turntable on which an optical disk is mounted, and the mechanical unit as a turntable. A frame for movably accommodating the mounted optical disc in the thickness direction, a clamper for holding the optical disc between the turntable, and a clamper mounting portion provided on the frame for rotatably supporting the clamper. Be prepared.

The clamper mounting portion is composed of a plurality of clamper retainers which support the peripheral edge of the clamper from both sides thereof. The clamper retainer which supports the clamper from the front side of the frame is elastic by pushing the clamper from the front side of the frame. It is configured so that it can be deformed and the clampers can be inserted by the respective clamper retainers to a position where they can be supported from both sides.

[0009]

Since the present invention is constructed as described above,
The clamper can be attached to the clamper attaching portion only by pushing the clamper from the front side of the frame, and the clamper attaching operation can be simplified. Further, since a plurality of clamper retainers are directly provided on the frame, it is possible to eliminate a dedicated member required for attaching the clampers, and it is possible to reduce the size and thickness of the entire apparatus.

[0010]

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

FIG. 1 is a perspective view showing the outer appearance of an optical disk reproducing apparatus according to an embodiment of the present invention. In the figure,
1 is a cabinet, 2 is a front panel. The front panel 2 has an opening 3 for loading and unloading a tray 10 on which an optical disk is mounted, an eject switch 4 for inputting an electrical command for ejecting the tray, and an automatic ejection of the tray 10 is impossible due to any failure. A small hole 5 for inserting a wire or the like to manually forcibly eject the tray is provided.

FIG. 2 is a perspective view showing the internal structure of the optical disk reproducing apparatus from the back side with the cabinet 1 removed, FIG. 3 is a perspective view showing a state in which the tray 10 is pulled out from FIG. 2, and FIG. 4 is an exploded view thereof. . The cabinet 1 is omitted in each figure.

In these figures, 20 is a frame made of mold resin, 30 is a pickup unit (referred to as PU unit), and 40 and 41 support the tray 10 and PU unit 30 in the frame 20 and move them respectively. Is a pair of sliders for guiding.

(Details of Frame 20) Here, details of the frame 20 will be described. On both sides inside the frame 20, slider support portions 21, 2 for slidably supporting the sliders 40, 41 in the arrow XX 'direction are provided.
1 is provided. Further, the tray 10 is attached to the frame 20 via a motor mount 22 provided integrally with the frame 20.
A loading motor 23, which is a power source for loading (loading) and discharging (unloading) the cabinet 1, is mounted. Further, the frame 20 is provided with a connecting member attachment portion 24 for attaching a connecting member 50 (see FIG. 6) for synchronizing the sliding operation of the sliders 40 and 41. In addition, the frame 20 is provided with a clamper mounting portion 25 for holding the clamper 60 rotatably.

(Details of Tray 10) Next, details of the tray 10 will be described. A disc mounting portion 11 which is a portion for mounting an optical disc (not shown) on the tray 10;
A window portion 12 is provided for exposing a part of the optical disc surface mounted on the disc mounting portion 11 so as to face the transport area of the optical pickup 31. Further, on both side surfaces of the tray 10, the slider engaging projections 1 are provided over the entire area in the longitudinal direction.
3 and 13 are respectively provided so as to project. The slider engagement protrusions 13 and 13 are fitted in the guide grooves 42 and 42 (see FIG. 5) provided in the sliders 40 and 41, respectively. As a result, the tray 10 moves the sliders 40, 4
1 is supported so that it can move horizontally in the direction of arrow XX '. A rack gear 14 is provided on the inner surface on one side of the tray 10. The rack gear 14 is connected to the loading motor 23 through various gears. In addition, a positioning pinhole 15 is provided on the back surface of the disk mounting portion 11 of the tray 10. The fixing pin 32 protruding from the PU unit 30 is inserted into and fitted into the pin hole 15 so that the tray 10 and the PU
The unit 30 and the unit 30 are positioned and fixed to each other.

(Details of PU Unit 30) Next, details of the PU unit 30 will be described. PU unit 30
Is an optical pickup 31 for reading information from the optical disc surface, a pickup feeding mechanism 33 for feeding the optical pickup 31 in the radial direction of the optical disc, and the clamper 60 while rotating the optical disc while sandwiching the optical disc. A disk drive mechanism composed of a turntable and a disk motor 34, and the like, a frame 35 for integrally supporting them, and a printed wiring board and the like. The above-described fixing pin 32 is integrally provided on the frame 35. in addition,
The sliders 4 are provided on both side surfaces of the frame 35, respectively.
Guide holes 43, 44, 45, 46 provided in 0, 41
(See FIG. 5), the guide pins 36a, 36b,
Projections 36c and 36d are provided.

(Details of Sliders 40 and 41) Next, details of the sliders 40 and 41 will be described. FIG. 5 is a perspective view showing a coupling relationship between the sliders 40 and 41 and the tray 10 and the PU unit 30.

As shown in the figure, each slider 40, 41
Each of the slider engaging projections 13 and 13 provided on both side surfaces of the tray 10 is fitted in the tray 10, and the tray 10 is attached with an arrow X-.
Horizontal guide grooves 42, 42 for slidably supporting in the X'direction are provided. Further, each of the sliders 40, 41 is provided with two guide holes 43, 44 and 45, 46, and each of the guide holes 43, 44, 45, 46 has a side surface of the frame 35 of the PU unit 30. Guide pins 36a, 36b and 36c, 36d projecting from are inserted. Each guide hole 43 ~
46 has horizontal guide paths a and c at both ends,
An inclination guide path b having a predetermined inclination angle is provided in the middle portion thereof, that is, an arrow X- of each slider 40, 41.
The PU unit 30 can be moved up and down within a certain height range as the X unit slides.

Rack gears 47 and 48 are provided at the lower ends of the sliders 40 and 41, respectively.
As shown in FIG. 6, gears 51 and 52 fixed to both ends of the connecting member 50 are meshed with the gears 7 and 48.
The connecting member 50 is provided on both ends of the shaft 53 with the gears 51,
52 is fixed and is rotatably attached to a predetermined position of the frame 20. In short, the sliders 40 and 41 are connected to each other via the connecting member 50 and are configured to slide in synchronization with each other. Further, one slider 41 has a loading motor 2
A rack gear 49 is provided that meshes with a gear 61 that is connected to the gear 3 via various gears.

(Details of Power Transmission System of Loading Motor 23) Here, the configuration of the power transmission system of the loading motor 23 will be described with reference to FIG. The motor 23 for loading and various gears are mounted on the motor mount 22 of the frame 20.
The motor gear 62, which is fixed to each of the motor gears (see FIGS. 3 and 4) and is coaxially fixed to the motor shaft of the motor 23, is coupled to the clutch gear 64 via the relay gear 63.

FIG. 7 is a plan view and a sectional view showing the structure of the clutch gear 64. As shown in the figure, the clutch gear 64 is formed by superimposing a first gear a and a second gear b shown in FIGS. The first gear a
Corresponds to the second gear in the claims, and the second gear corresponds to the first gear in the claims. (C) is a plan view showing a state in which the gears a and b are overlapped with each other, and a cross-sectional view showing how the gears a and b are overlapped with each other. The first gear a has an engagement protrusion a1 protruding from the surface facing the second gear b. On the other hand, the inside of the second gear b is hollow except for the engaging portion (shaded portion) indicated by b1 so that the engaging protrusion a1 can be accommodated in the gear b in a state of being overlapped with the first gear a. It has a curved shape. And the first gear a
As shown in FIG. 5, is coupled to the motor gear 62 via the relay gear 63 and receives power transmission from the motor 23. A small-diameter gear a2 is integrally provided with the first gear a, and the small-diameter gear a2 is meshed with a rack gear 49 provided on the slider 41. On the other hand, the second gear b is always meshed with the rack gear 14 provided on the tray 10.

The role of the clutch gear 64 is that the motor 2
It goes without saying that the power of 3 is simultaneously transmitted to the tray loading mechanism and the PU unit lifting mechanism.
After the loading of the tray 10 is completed, power is transmitted only to the PU unit elevating mechanism to continue the elevating operation of the PU unit 30 (movement toward the position (height) where the disc clamp is possible). Just before starting the unloading of the tray 10, the power of the motor 23 is transmitted only to the PU unit lifting mechanism for a certain period of time, and the PU unit 3
It is to realize the operation of moving 0 in the direction away from the disk surface.

FIG. 8 is a diagram showing the operation of the clutch gear 64. FIG. 8A shows a state of the tray 10 during loading and unloading. At the time of loading, the first gear a is driven in the direction of arrow Ra by the power of the motor 23. Further, at this time, the engagement portion b1 of the second gear b is in a state of being locked by the engagement protrusion a1 of the first gear a, so that the second gear b is in the same direction as the first gear a. Simultaneously rotate in the direction of arrow Rb.
The engaging portion b1 of the second gear b has a shape that can be elastically deformed by pressing from the engaging protrusion a1 of the first gear a. At this time, the engaging portion b1 of the second gear b is engaged. The load received by the joining portion b1 is only the conveyance resistance of the tray 10, and does not reach the extent of deformation.

When unloading, the first gear a
Is driven in the direction opposite to the arrow Ra by the power of the motor 23. At this time, the engaging portion b1 of the second gear b is completely locked by the engaging protrusion a1 of the first gear a. Therefore, the second gear b rotates in the same direction as the first gear a (the direction opposite to the arrow Rb).

FIG. 8B shows a state immediately after the loading of the tray 10 is completed (the tray 10 is horizontally moved to the limit in the cabinet 1). As described above, in this disc reproducing apparatus, the PU unit 30 is configured to continue the lifting operation even after the loading is completed. Therefore, the first gear a is moved in the direction of the arrow Ra by the power of the motor 23 even after the loading is completed. Driven. On the other hand, the rotation of the second gear b in the clutch gear 64 meshing with the rack gear 14 of the tray 10 is restricted at the same time when the loading is completed. Therefore, the engaging portion b1 of the second gear b having a shape capable of elastic deformation is
The first gear a is constantly elastically deformed by being pressed by the engagement protrusion a1, and the two are released from the hooked state, so that only the first gear a rotates in the direction of the arrow Ra alone. The rotation of the first gear a is transmitted to the PU unit elevating mechanism including the slider 41 through the rack gear 49 of the slider 41. As a result, the elevating operation of the PU unit 30 (to a position (height) at which the disc clamp is possible) is performed. All movements) will continue thereafter.

FIG. 8C is a diagram showing the state of the clutch gear 64 at the time when the raising / lowering operation of the PU unit 30 is completed. Until this state, the first gear a rotates independently.

At the time of unloading, first, the power of the motor 23 drives the first gear a in the direction opposite to the arrow Ra to move the PU unit 30 up and down (moves away from the disk surface). After that, FIG. 8 (B)
After this state, the gears a and b shown in FIG. 8 (A) are locked, and the ejection operation of the tray 10 is started.

(Details of Disc Clamping Mechanism) Next, details of the disc clamping mechanism will be described. In FIGS. 4, 6 and 9, reference numeral 25 denotes a clamper mounting portion for rotatably holding the clamper 60. As shown in FIG. 9, the clamper mounting portion 25 is provided with claw portions 26, 26, 26 for pressing the clamper 60 from above at three locations around the opening into which the clamper 60 is fitted. The clamper 60 is vertically held between the three claws 26, 26, 26 and a pedestal 27 provided in the lower portion of the opening in a rotatable state. Here, the claw portion 26 is the clamper 6
It has a shape such that 0 can be elastically deformed by pressing when it is mounted from above. In detail, this claw portion 26,
It has a taper at its tip for elastically deforming the claw portion 26 by receiving pressure from the clamper 60 when the clamper is attached,
Further, the clamper 60 has a horizontal clamper pressing surface so that the clamper 60 does not separate from the clamper mounting portion 25 after the mounting. The clamper 60 has a magnet (not shown) therein, and is magnetically coupled with a magnetic body (not shown) fixed to the turntable 28 of the disc drive mechanism to connect the optical disc D to the turntable 28. Hold it in place.

(Details of Disk Drive Mechanism) FIG. 10 is an exploded view showing the structure of the disk drive mechanism. 9 and 1
As shown in FIG. 0, the disc drive mechanism is mounted on the turntable 28, the disc motor 34 that drives the turntable 28, and the spring 29 on the turntable 28, and mounts the optical disc D at the center on the turntable 28. And a centering 37 for positioning.

FIG. 11 is a plan view and a sectional view showing the construction of the turntable 28 and the centering 37. As shown in the figure, the centering 3 is provided on the turntable 28.
7 and projecting plates 37a, 37b, 3 provided around the centering 37 at three locations so as to project at equal intervals.
Insertion recesses 28a, 28b, 28c for inserting 7c
Is provided. Such insertion recesses 28a, 28b, 2
Fitting portions 28d, 28e, 28f for fitting and holding the projecting plates 37a, 37b, 37c are integrally provided on the 8c with the stoppers S1, S2, S3 interposed therebetween.

When the centering 37 is mounted on the turntable 28, as shown in FIG. 12A, first, the protruding plates 37a, 37b and 37c of the centering 37 are inserted into the insertion recesses 28a, 28b and 28 of the turntable 28, respectively. Fit both according to the position. At this time, each projection plate 37a,
The height position of the upper end surface of 37b, 37c is the height of each stopper S.
The centering 37 is strongly pressed against the force of the spring 29 so as to be lower than the height position of the lower end surfaces of 1, S2 and S3. Next, while the centering 37 is being strongly pushed, it is rotated in the direction of the arrow, and as shown in FIG. 12B, the projecting plates 37a, 37b, 37c are brought to the positions of the fitting portions 28d, 28e, 28f. After that, by releasing the finger from the centering 37, the centering 37 is lifted up by the force of the spring 29 and fixed at that position.

(Details of Synchronization Confirmation Structure of Each Slider 40, 41) Next, a synchronization confirmation structure of each slider 40, 41 in this disc reproducing apparatus will be described with reference to FIGS. 6 and 18. As described above, each slider 40, 41
Are connected through a connecting member 50, so that the sliders can be slid synchronously. Here, the sliders 40 and 41 and the coupling member 50 are coupled to each other through a gear, and each gear 5 of the coupling member 50 is connected.
1, 52 are rack gears 47, 4 of the sliders 40, 41.
8 and each slider 4 if not in mesh with a specific gear position.
I cannot slide 0 and 41 in correct synchronization.

Therefore, in this embodiment, as shown in FIG. 18, the holes 4 are formed at predetermined positions of the sliders 40 and 41 which are symmetrical to each other.
0b and 41b respectively, and holes 40b and 41b of the sliders 40 and 41 are provided on both walls 201 and 202 of the frame 20 when the sliders 40 and 41 are in the correct positions when they are joined by the connecting member 50. The confirmation windows 20d and 20d overlapping with the above are provided. Therefore, when assembling the product, the operator may
If the connecting member 50 is attached by aligning 41b with the positions of the confirmation windows 20d, 20d of the frame 20, the sliders 40, 41 can be connected by the connecting member 50 at an easy and accurate position.

(Details of Operation at Tray Loading) Next, the tray loading and the raising / lowering operation of the PU unit in the optical disk reproducing apparatus will be described. FIG. 13 is a side view showing the operation during tray loading, and FIGS. 14 to 17 are plan views thereof.

3, FIG. 13 (A) and FIG. 14 show the state when the tray 10 is being discharged. As shown in these figures, when the tray is ejected, the PU unit 3
0 guide pins 36a, 36b, 36c, 36d are guide holes 43, 44 provided in the sliders 40, 41,
It is located on the upper horizontal guide path a of 45 and 46.
That is, the PU unit 30 is shown in FIG.
The turntable 2 of the PU unit 30 is located at the upper middle position.
8 and the clamper 60 attached to the clamper attaching portion 25 of the frame 20 are separated from each other. On the other hand, as shown in FIG. 14, the rack gear 14 provided on the tray 10
Is always in mesh with the second gear b of the clutch gear 64.

Loading of the tray 10 is started by the user pushing the tray 10 in the direction of the arrow X'with a finger or the like. When the tray 10 has moved a certain distance, the movement of the tray 10 causes the switch 70 mounted on the frame 20.
The loading motor 23 is activated by being electrically detected by and the detection signal being notified to the controller. Upon activation of the loading motor 23, the entire clutch gear 64 rotates in the direction of the arrow, whereby the tray 10 is automatically pulled inward. When the retracted amount of the tray 10 reaches a predetermined distance, the insertion side end surface 10a of the tray 10 contacts the one end 81 of the rotary lever 80, as shown in FIG. This rotating lever 80
As shown in FIGS. 4 and 5, is rotatably supported on the frame 20 via a support shaft 82, and the other end 8
3 is capable of coming into contact with the end surface of one slider 40 in order to push out one slider 40 to the front side (direction of arrow X). Therefore, the one end portion 81 of the rotary lever 80 comes into contact with the insertion side end surface 10a of the tray 10 and the rotary lever 80
By rotating in the direction of arrow C, the slider 40 begins to slide toward the front side (direction of arrow X). When the slider 40 moves, the slider 40 and the connecting member 50
The other slider 41 connected via the slider also slides in the arrow X direction in synchronization with the slider 40.

After that, the tray 10 is continuously pulled inward, and as shown in FIG. 16, when the insertion-side outermost surfaces 16a and 16b contact the innermost surface 20c of the frame 20, the tray 10 is moved. The pull-in operation ends. FIG. 13B is a side view at this time, and at this time, P
Each guide pin 36a, 36b, 36 of the U unit 30
c and 36d are located on the inclined guide path b of the guide holes 43, 44, 45 and 46 provided in the sliders 40 and 41, respectively. That is, the PU unit 30 is located at approximately the middle of its lifting range.

At this point, as shown in FIG. 16, the slider 40 has moved to a position where the rack gear 49 can mesh with the gear 61, and the power of the loading motor 23 is transmitted through the clutch gear 64 and the like. Each slider 40, 41 is further moved in the arrow X direction. At this time, as described above, the power of the motor 23 to the tray loading mechanism system is cut off due to the structural characteristics of the clutch gear 64, and the power is transmitted only to the elevating mechanism system of each slider 40, 41.

FIG. 17 shows a state after the movement of the sliders 40 and 41 is completed, and the loading of the tray 10 is completed in this state. FIG. 13C is a side view at this time, and at this time, each guide pin 36 of the PU unit 30.
The a, 36b, 36c, and 36d are located on the lower horizontal guide path c provided in the guide holes 43, 44, 45, and 46 provided in the sliders 40 and 41, respectively. That is, the PU unit 3
0 is located at the lower end in FIG. 13 in the ascending / descending range, whereby magnetic coupling is achieved between the turntable 28 of the PU unit 30 and the clamper 60 mounted on the clamper mounting portion 25 of the frame 20 with the optical disk interposed therebetween. To be done. That is, clamping of the optical disc is achieved. Further, at this time, the fixing pin 3 protruding from the PU unit 30
2 is fitted in the pinhole 15 provided on the back surface of the disc mounting portion 11 of the tray 10, whereby the tray 1
0 and the PU unit 30 are positioned and fixed with respect to each other in the vertical and longitudinal directions.

Eject switch 4 ejects tray 10.
It is started by pressing. When the controller receives the eject detection signal from the eject switch 4, the controller controls the loading motor 23 so that the loading motor 23 can be driven in the reverse rotation direction to that at the time of loading. This gives P
The U unit 30 moves from the position (height) in FIG. 13C to the position (height) in FIG. 13B, and the disc clamp is released. After that, the tray ejection is performed in the completely reverse procedure to the case of the loading operation described above, and when it is electrically detected by the switch 70 mounted on the frame 20 that the tray 10 is ejected to a predetermined position, the motor is ejected. 23 is stopped, and the unloading of the tray 10 is completed by pulling the tray 10 to the end with a finger.

Next, in this disc reproducing apparatus, the operation for forcibly ejecting the tray 10 from the cabinet 1 will be described when the loading mechanism including the loading motor 23 fails.

As shown in FIG. 1, the front panel 2 is provided with a small hole 5 into which a wire or the like can be inserted.
2, a wire or the like is inserted, and the tip of the wire 100 or the like is strongly pressed against the end surface 40a of the one slider 40, as shown in FIG. As a result, the sliders 40 and 41 are forcibly slid in the direction of the arrow X'and the PU unit 30 is raised. Here, by forcibly moving the slider 41 in the direction of the arrow X ', as shown in FIG. 17, the rotary lever 80 in which the slider 41 and one end portion 83 are in contact with each other.
Rotates about the support shaft 82 in the direction of arrow C ', and as a result,
The tray 10 is pushed out to the front side. At this time, the fixing pin 32 of the PU unit 30 is attached to the pin hole 15 of the tray 10.
Since it is detached from the tray, the tray 10 can be pulled out by the fingers.

As described above, according to the optical disk reproducing apparatus of this embodiment, as shown in FIG. 9, the clamper mounting portion 25 for rotatably holding the clamper 60 is provided on the frame 20 made of mold resin. Since it is integrally provided, a dedicated member required for attaching the clamper 60 can be eliminated, and the overall size and thickness of the device can be reduced. Further, the clamper 60 is attached to the frame 20 at the clamper attaching portion 25.
Since the claw portions 26, 26, 26 for pressing from the front side of the clamper 60 are configured so as to be elastically deformable by the pressing when the clamper 60 is mounted, the clamper 60 is not supported by the frame 2.
It can be easily attached to the clamper attaching portion 25 by pushing in from the front side of 0. Further, in this clamper mounting structure, the claw portions 26, 26, 26 of the frame 20 are
Since a gap that is not sealed by the clamper 60 is formed in the portion where the clamper 60 is pressed by, the inside and outside of the frame 20 is ventilated through this gap, and the heat source (optical pickup 31, various motors, etc.) inside the frame 20 is used. It can contribute to suppression of temperature rise.

[0044]

As described above, according to the present invention, the clamper can be attached to the clamper attaching portion only by pushing the clamper from the front side of the frame, and the clamper attaching work can be simplified. Further, since a plurality of clamper retainers are directly provided on the frame, it is possible to eliminate a dedicated member required for attaching the clampers, and it is possible to reduce the size and thickness of the entire apparatus.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of an optical disk reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the internal structure of the optical disk reproducing apparatus of FIG. 1 from the back side with the cabinet removed.

FIG. 3 is a perspective view showing a state in which a tray is pulled out in FIG.

FIG. 4 is an exploded view of the optical disk reproducing device of FIG.

FIG. 5 is a perspective view showing a connection relationship between a slider 1 and a tray or a PU unit.

FIG. 6 is a perspective view of the optical disk reproducing device shown in FIG. 2 viewed from the front side.

FIG. 7 is a plan view and a sectional view showing the structure of a clutch gear.

FIG. 8 is a view for explaining the operation of the clutch gear of FIG.

FIG. 9 is a plan view and a sectional view showing a disc clamp mechanism.

FIG. 10 is an exploded view showing the configuration of a disk drive mechanism.

11 is a plan view and a cross-sectional view showing the configurations of a turntable and centering in the disk drive mechanism of FIG.

FIG. 12 is a diagram for explaining a method of mounting centering on a turntable.

FIG. 13 is a side view showing the operation during tray loading.

FIG. 14 is a plan view showing a state when the tray is discharged.

FIG. 15 is a plan view showing a state in which the tray is being pulled in.

FIG. 16 is a plan view showing a state at the end of retracting the tray.

FIG. 17 is a plan view showing a loading completed / disk clamp completed state.

FIG. 18 is a perspective view for explaining a synchronization confirmation structure of each slider.

FIG. 19 is a perspective view showing a conventional clamper mounting structure.

FIG. 20 is a cross-sectional view showing a conventional clamper mounting structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cabinet, 10 ... Tray, 13 ... Slider engagement protrusion, 14 ... Rack gear, 15 ... Pinhole, 20 ... Frame, 23 ... Loading motor, 25 ... Clamper mounting part, 26 ... Claw part, 28 ... Turntable, 28a,
28b, 28c ... Inserting recesses, 28d, 28e, 28f ...
Fitting part, S1, S2, S3 ... Stopper, 29 ... Spring, 30 ... Pickup (PU) unit, 31
... optical pickup, 32 ... fixed pin, 34 ... disk motor, 36a, 36b, 36c, 36d ... guide pin,
37 ... Centering, 37a, 37b, 37c ... Projection plate, 40, 41 ... Slider, 42 ... Guide groove, 43, 4
4, 45, 46 ... Guide hole, 49 ... Rack gear, 50 ...
Connection member, 60 ... Clamper, 64 ... Clutch gear, a ...
1st gear, a1 ... Engagement protrusion, b ... 2nd gear, b1 ...
Engagement part, 80 ... Rotating lever.

Claims (3)

[Claims] 1. A mechanical unit having a disk drive mechanism including a turntable on which an optical disk is mounted, a frame for movably accommodating the mechanical unit in a thickness direction of the optical disk mounted on the turntable, and the turn. A disc reproducing device comprising: a clamper for holding the optical disc between a table and the table; and a clamper mounting portion provided on the frame for rotatably supporting the clamper. 2. The disc reproducing apparatus according to claim 1, wherein the clamper mounting portion includes a plurality of clamper retainers that support a peripheral edge portion of the clamper from both sides thereof, and supports the clamper from a front side of the frame. The clamper retainer is configured so that it is elastically deformed by pushing the clamper from the front side of the frame, and the clampers can be inserted by the respective clamper retainers into positions that can be supported from both sides. Playback device. 3. The disc reproducing apparatus according to claim 2, wherein a clamper retainer for supporting the clamper from the front side of the frame is provided integrally with the frame.