JP3311030B2 - Disc clamp device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk clamp device, for example, a disk such as a compact disk, a video disk, or a record in which audio is recorded in an analog manner. The present invention relates to a disk clamping device that clamps a disk so as not to slip on a turntable when rotating the disk.

[0002]

2. Description of the Related Art A conventional disk clamp apparatus of this type is provided with a disk above a turntable provided with a disk hole insertion portion called a spindle for inserting a disk hole formed in the center of the disk, or on a player. A lid that opens and closes to set the shutter is provided with a clamper that is biased downward.

[0003] In this clamper, a disc is conveyed onto a turntable by a loading means from the front of a player, and is set when the disc is set on the turntable or after the lid is opened and the disc is set on the turntable, the lid is closed. When the turntable is rotated, it rotates together with the turntable so as to prevent slippage between the disk and the turntable.

[0004]

In a disk clamping device for clamping a disk on a turntable on which a disk is set by the loading device, a clamp arm lowers the clamper onto the disk when the setting is completed. In addition, since the clamp arm is a large-sized part, it is difficult to reduce the size of the player, and the number of parts increases.

When the clamper is provided on the lid, the clamper itself is merely pressed against the turntable by an urging member. The urging member for urging the clamper includes a projection provided on the upper surface at the center of the clamper. When the clamper rotates, friction occurs between the urging member and the projection, and the projection may be worn.

The present invention has been made in view of the above-mentioned problems in such a conventional disk clamp apparatus, and has a small number of parts, a small size of a player, and a space between a clamper and an urging member. It is an object of the present invention to provide a disk clamping device that does not cause such wear due to friction.

[0007]

According to the present invention, a disk hole insertion portion 3 into which a center hole of a disk is inserted and a shaft 4a for rotational drive are mounted on a turntable surface 2 on which the disk is mounted. A turntable 1 integrally provided with a boss 6 having a shaft hole 5; guide holes 7 and guide holes 8 provided in the turntable surface 2 and the disc hole insertion portion 3, respectively; , 8 and a disc holding piece 11 having a disc holding section 9 which moves up and down in the disc hole inserting section 3, and the guide hole 7 for moving the disc holding section 9 in the inner circumferential direction.
A cam surface 14 formed on the side wall of the disk holding piece 11 and a cam surface 16 formed on the disk pressing piece 11 to be pressed by the inner peripheral edge 15 of the guide hole 8 to move the disk pressing portion 9 in the outer peripheral direction. The disc holding piece 11 is mounted between the turntable 1 and the disc holding piece 11.
Provided with an urging member 12 for urging downward, and a push-up member 19 to push up the disk pressing piece 11 with respect to the turntable 1, the shape on the side wall of the guide hole 7
The cam surface 14 is formed when the holding piece 11 rises.
When the disk hole insertion portion 3 is
Push down toward the center to insert the holding part 9 into the disc hole
Into a shape that acts to pull in more than the outer circumference of part 3
The cam formed and formed on the disc holding piece 11
The surface 16 is configured so that the holding piece 11 is biased by the biasing member 12.
And the lower surface of the presser 9 is turned on the turntable.
2 is pressed against the upper surface of the disk A placed on
Is pushed by the inner peripheral edge 15 of the guide hole 8 when the
The even portion 9 is made to protrude outside the disc hole insertion portion 3
It is characterized by being formed in a shape .

[0008]

According to the disk clamping device of the present invention, when the disk pressing piece is raised by operating the lifting member,
The disc holding part is moved inward by the cam surface on the upper surface of the guide hole that guides the disc holding part, pulled inward from the disc hole insertion part of the turntable, and the center hole of the disc is inserted into the disc hole insertion part. Then, the disc can be placed on the turntable surface.

When the push-up member is returned after the mounting, the disc pressing piece is lowered by the urging of the urging member, and the cam surface of the disc pressing section is pressed by the inner peripheral edge of the guide hole, and the disc pressing piece is moved outward from the disc hole inserting section. The disk is projected and the disk is pressed against the turntable surface by lowering the disk pressing portion.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The turntable 1 is provided with a turntable surface 2 on which a disc is mounted, and the turntable surface 2
A disk hole insertion portion 3 into which a center hole of a disk called a spindle hole is inserted is provided at a center portion of the disk drive. A shaft 4a of a disk motor 4 is mounted below the center of the disk hole insertion portion 3. A boss 6 provided with a shaft hole 5 is provided.

The disc hole insertion portion 3 and the turntable surface 2 are provided with guide holes 7 and 8, respectively, and a disc holding portion 9 inserted into the guide holes 7 and 8 is provided with a lower ring-shaped portion 10. The ring-shaped portion 10 of the disc holding piece 11 provided so as to extend upward from is fitted to the boss 6 of the turntable 1 so as to be able to move up and down.

The lower part of the turntable surface 2 of the turntable 1 and the ring-shaped part 10 of the disc holding piece 11
And a spring 12 is mounted between them to urge the holding piece 11 downward.

A cam surface is provided on the left and right inner side walls of the guide hole 7.
The cam surface 14 is provided with the guide hole 7.
Protrudes on both left and right sides of the holding part 9 of the disc inserted in
Slides on the projected portion 13 and guides the projected portion 13.
You. This cam surface 14 is used when the holding piece 11 rises.
Slide the protrusion 13 to the center of the disc hole insertion portion 3
Side to push the holding part 9 into the disc hole insertion part 3.
Formed into a shape that acts to pull in more than the outer circumference of the
Have been. Therefore, when the holding piece 11 rises, the protruding portion 13 is guided by the cam surface 14, and the holding portion 9 is pushed toward the center of the disk hole insertion portion 3, and is drawn inward from the outer periphery .

A cam surface 16 is formed inside the holding portion 9 to contact the inner peripheral edge 15 of the guide hole 8 . This
The cam surface 16 of the holding piece 11 is biased by the spring 12
Lowers and the lower surface of the holding section 9 is placed on the turntable surface 2.
Is pressed against the upper surface of the disc A
When pressed by the inner peripheral edge 15 of the guide hole 8, the pressing portion
9 is projected outside the disc hole insertion portion 3.
It is formed in the shape which can be done. Therefore, when the holding piece 11 is lowered by the bias of the spring 12, the cam surface 16 is pressed by the inner peripheral edge 15 of the guide hole 8, and the holding portion 9 projects outside the disc hole insertion portion 3 .

A push-up member (lever) 19 is supported on a chassis 17 to which the disk motor 4 is attached by a support shaft 18 so that the tip can be raised and lowered.
A spring 20 for urging the distal end of the lever 19 downward is mounted between the other end of the chassis 9 and the chassis 17.

Therefore, when the other end of the lever 19 is pressed down against the bias of the spring 20, the other end of the lever 19 is raised, and the ring-shaped portion 10 of the holding piece 11 is pressed against the spring 12. And push up, so the holding piece 11 is the turntable 1
Rise against.

The holding portion 9 also rises with the rise. At this time, the protrusions 1 protruding from the left and right sides of the holding portion 9 are provided.
3 is guided by cam surfaces 14 provided on the left and right sides of the guide hole 7 of the turntable 1, and the tip of the holding portion 9 for holding the disk A between the turntable surface 2 and the peripheral surface of the disk hole insertion portion 3 Pull in inside.

Therefore, the disk A can be mounted on the turntable surface 2 so that the center hole of the disk A is fitted into the disk hole insertion portion 3 of the turntable 1, and after the mounting, the other end of the lever 19 is The pressing of the side is stopped, and the tip is lowered by the urging force of the spring 20.

Then, the spring 12 with respect to the ring-shaped portion 10 is
The pressing piece 11 is lowered by the urging force of the above, so that the pressing portion 9 is also lowered, and the cam surface 16 provided below the pressing portion 9 is provided.
Is pressed by the inner peripheral edge 15 of the guide hole 8, and the tip on the outer peripheral side of the holding section 9 is projected to the outer peripheral side of the disc insertion section 3.

At this time, since the holding piece 11 is also lowered, the lower surface of the holding portion 9 is pressed against the upper surface of the disk A placed on the turntable surface 2, and the disk A is held in contact with the holding portion 9 and the turntable surface. The rotation of the disk motor 4 is transmitted to the disk A without being slipped.

As described above, according to the present embodiment, it is sufficient to add a disc retainer, a spring, and a lever as a clamp device to the turntable, and the number of components can be reduced, thereby simplifying the assembling process. Combined with what you can do, you can also lower costs.

Further, the present invention has an effect that any wear due to friction between the rotating clamp and the urging member can be prevented as in the conventional clamp device.

[0023]

According to the present invention, as described above, the disk clamping device for clamping the disk is housed in the disk hole insertion portion 3 of the turntable 1 on which the disk is mounted, so that the conventional disk The size is smaller than that of the clamp device, which contributes to the downsizing of the disc player. Further, the disc holding portion 9 can be accurately moved in the inner circumferential direction by the cam surface 14, and the disc holding portion 9 can be accurately moved in the outer circumferential direction by the cam surface 16.
Does not need to be moved by the urging force of a spring or the like, the number of components can be reduced, and the disc pressing and releasing by the disc pressing pieces 9 can be accurately performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a disk clamp state according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the disc clamp in an open state;

FIG. 3 shows a disk clamp device according to the present invention .
No disc is placed on the turntable surface
When the holding piece is lowered by the biasing force of the spring,
Explanation of the position of the disc holding part and the position of the tip of the lever
FIG. 2 is a schematic sectional view schematically shown.

[Explanation of symbols]

 A disk 1 turntable 2 turntable surface 3 disk hole insertion part 7, 8 guide hole 9 disk holding part 11 disk holding piece 12 spring (biasing member) 14, 16 cam surface 15 inner peripheral edge 17 chassis 19 lever (push-up) Member) 20 spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-240472 (JP, A) JP-A-60-2399961 (JP, A) Real-life Japanese Utility Model Showa 60-737 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) G11B 17/028

Claims (1)

(57) [Claims] 1. A disc hole insertion portion 3 into which a center hole of a disc is inserted above a turntable surface 2 on which a disc is mounted, and a boss 6 having a shaft hole 5 into which a shaft 4a for rotational drive is mounted. , A guide hole 7 , a guide hole 8 provided in each of the turntable surface 2 and the disk hole insertion portion 3, and a disk hole inserted in the guide holes 7 , 8. Disc holding piece 11 having a disc holding section 9 that moves up and down inside the section 3
A cam surface 14 formed on a side wall of the guide hole 7 and an inner peripheral edge 15 of the guide hole 8 to move the disk press portion 9 in the inner circumferential direction. In order to move the disc holding piece 11 in the outer peripheral direction, the cam face 16 is formed between the turntable 1 and the disc holding piece 11 to urge the disc holding piece 11 downward. a biasing member 12 which includes a push-up member 19 to push up the disk pressing piece 11 with respect to the turntable 1, the cam surface 14 formed on the side wall of the guide hole 7, the
Do not slide the protrusion 13 when the holding piece 11 is raised.
And push it toward the center of the disc hole insertion part 3.
Pull the holding part 9 inward from the outer circumference of the disc hole insertion part 3.
And a cam surface 16 formed on the disc holding piece 11,
The holding piece 11 is lowered by the urging of the urging member 12.
Then, the lower surface of the holding portion 9 is placed on the turntable surface 2.
Is pressed against the upper surface of the disc A
The pressing portion 9 is pressed by the inner peripheral edge 15 of the guide hole 8 and
Formed to protrude outward from disc hole insertion part 3
Disc clamp device characterized by being performed .