JPH0325328Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to a clamping device for a disc player for clamping and holding a disc on a turntable. The present invention relates to a disc player clamping device suitable for use in an optical disc player for playback.

(b) Prior Art Optical disc players are known that use optical pickups to reproduce signals recorded on discs. The mainstream disc player is one in which the disc is mounted on a slide table that slides in the horizontal direction.
As shown in the publication, there is provided a slide table sliding operation in which the slide table is slid between an attachment/detachment position in which a disk is attached/detached and a playback position in which the center hole of the disk is located on the turntable. When the playback position is reached, it is necessary to move the disk vertically and perform a disk clamping operation to press the disk onto the turntable. The disk player disclosed in the above publication includes a cam member and a coupling mechanism for driving the cam member, and the coupling mechanism drives the cam member when the slide table reaches the playback position. The clamp plate for clamping the disk is rotated according to the position of the cam member, so that the above-mentioned slide table sliding operation and disk clamping operation are sequentially performed in a series of operations.

(c) Problems to be Solved by the Invention However, the above-mentioned device requires a movable rack that slides together with the slide table and a gear that meshes with the movable rack as the coupling mechanism, and the above-mentioned cam member does not need to be used. As a mechanism for rotating the clamp plate according to the position, the cam member is arranged so as to rotate in conjunction with the gear, and the cam member is engaged with the clamp plate by displacement in a direction perpendicular to the disk. Since the mechanism is complicated, the mechanism is complicated, resulting in an increase in the size and cost of the device.

(d) Means for Solving the Problems The present invention has been developed in view of the above points, and includes a guide groove that rotates in conjunction with the sliding movement of the slide table and has cam portions with different diameters. a rotating body, a crimping part that is rotatable about an axis between a clamped position and an unclamped position, and that presses the disk onto the turntable, and a guide inserted into a guide groove of the rotating body. A clamp plate having a pin is provided.

(E) Function The present invention displaces the guide pin in the radial direction of the disk by the pressing force of the cam part provided on the rotating body against the guide pin when the slide table is displaced to the playback position. is configured to be rotationally displaced from the non-clamped position to the clamped position.

(f) Example Fig. 1 is a cross-sectional view showing the clamp plate in the non-clamp position, and Fig. 2 is a cross-sectional view showing the clamp plate in the clamp position. a slide table 3; a first gear 3 having a first tooth row 3a formed on the back surface of the slide table 1 and meshing with the rack 1a; 4 a disk placed on the slide table 1;
5 is a turntable for rotating the disk 4, and 6 is a clamp plate having a crimping portion 6a for crimping the disk 4 onto the turntable 5. As shown in FIG. 3, the first gear 3 has a second tooth row 3b formed on its outer periphery that meshes with a second gear 8 fixed to the rotating shaft 7a of the motor 7 serving as a drive source. A guide groove 3d having a cam portion 3c with a different diameter between the first tooth row 3a and the second tooth row 3b
is formed. Further, the clamp plate 6 is
As shown in FIG. 4, each side has projections 6b and 6c, and a guide pin 6d is provided that projects from a straight line connecting the projections 6b and 6c. The protrusions 6b and 6c are fitted into the recesses 10a and 11a of the bosses 10 and 11, respectively, set on the chassis 9, and the clamp plate 6
is rotatable about a straight line connecting the protrusions 6b and 6c, and the guide pin 6d is
As shown in FIG. 3, the guide groove 3 of the first gear 3
It is inserted in d.

Now, the slide table 1 is at the disk attachment/detachment position, and when the disk 4 is placed on the disk placement portion 1b and the opening/closing lever (not shown) is pressed, the motor 7 starts rotating in the direction of arrow A. The rotation of the motor 7 in the direction of arrow A is transmitted to the second tooth row 3b of the first gear 3 via the second gear 8, causing the first gear 3 to rotate in the direction of arrow B. The rotation of the first gear 3 in the direction of arrow B is transmitted to the rack 1a formed on the slide table 1, so the slide table 1 slides in the direction of arrow C and starts moving to the playback position. . At this time, the guide pin 6d of the clamp plate 6 is located at a position other than the cam part 3c of the guide groove 3d of the first gear 3, so that the clamp plate 6 has a crimp part 6a that is turned as shown in FIG. It is in an unclamped position away from the table 5.
Then, when the first gear 3 rotates by a predetermined angle and the slide table 1 reaches the playback position, the first gear 3 has a notch 3e formed in the first tooth row 3a. The meshing between the rack 1a and the rack 1a is released, and the sliding movement of the slide table 1 is stopped.

Thereafter, when the first gear 3 is further rotated by the motor 7, the guide pin 6d of the clamp plate 6 reaches the cam part 3c of the guide groove 3d, and the guide pin 6d is moved in the direction of arrow D by the cam part 3c. Pressed. Therefore, the clamp plate 6 rotates in the direction of arrow E around the shaft based on the principle of leverage. When the clamp plate 6 rotates in the direction of arrow E, the protrusion 6e provided at the end of the clamp plate 6 engages the support portion 1c provided on the disk mounting portion 1b to support the disk 4. The disc 4 is lowered onto the turntable 5 by pressing the interlocking member 12 disposed on the slide table 1 in an interlocking manner, and the crimp portion 6a presses the disc 4. Therefore, as shown in FIG. 2, the clamp plate 6 is displaced to the clamp position in which the disc 4 is crimped and fixed onto the turntable 5 by the crimp portion 6a, and the disc clamping operation is completed. .

Since the crimp portion 6a is supported by the other end of the leaf spring 13 whose one end is fixed to the clamp plate 6, it is possible to reliably crimp and fix the warped disk 4 onto the turntable 5 without damaging it. .

(g) Effects of the invention As described above, according to the present invention, it is possible to provide a clamping device for a disk player in which the slide table sliding operation and the disk clamping operation are sequentially performed in a series of operations. Since the guide pin is configured to be displaced in the radial direction of the rotating body, a cam portion of the rotating body for pressing the guide pin can be provided in the radial direction of the rotating body, and the rotating body is thin. In addition, since the guide pin is provided so as to protrude substantially perpendicularly to the surface direction of the clamp plate from approximately on the rotation center axis of the clamp plate, the guide pin is provided from the rotation center axis of the clamp plate. It is easy to make the distance to the pin much shorter than the distance from the rotational center axis to the crimping part, and it is possible to reduce the amount of displacement of the guide pin while ensuring the rotational displacement range of the clamp plate.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, and Fig. 1 is a cross-sectional view showing a state in which the clamp plate is in the non-clamped position;
3 is a plan view for explaining the present invention, and FIG. 4 is a perspective view showing the clamp plate. Explanation of main drawing numbers, 1...Slide table, 3
...First gear, 3c...Cam part, 3d...Guide groove, 5...Turntable, 6...Clamp plate,
6a...Crimp part, 6d...Guide pin.

Claims (1)

[Scope of utility model registration request] In a disk player equipped with a slide table that is horizontally slidable between a disk attachment/detachment position and a playback position, the cam portion rotates in conjunction with the sliding movement of the slide table and has a cam portion having a different diameter. a rotating body formed with a guide groove; a clamp plate rotatable about an axis between a clamped position and a non-clamped position; and a clamp plate having a crimping portion for crimping the disc onto the turntable; a guide pin protruding substantially perpendicularly to the surface direction of the clamp plate from substantially on the rotation center axis of the clamp plate and inserted into a guide groove of the rotating body, and the slide table is positioned at the playback position. When the guide pin is displaced in the radial direction of the rotating body by pressure from a cam portion provided on the rotating body, the clamp plate is rotationally displaced from a non-clamped position to a clamped position. A disk player clamp device featuring this feature.