JPH0135322Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a disk clamping device for clamping and rotating a disk such as a compact disk or a video disk during performance.

``Prior Art'' A conventional disc clamping device of this type is shown in FIG. 3. In the drawing, A
is a compact disc, B is its center hole, C is a disc table on which compact disc A is placed, and the diameter of this disc table C is set to be approximately the same as the inner circumference of compact disc A. A truncated conical portion D that fits into the center hole B and positions the compact disk A is protruded from the center. This disk table C is fixed to a rotating shaft E of a motor (not shown).

F is a clamper for pressing the compact disk A onto the disk table C. A ball G is rotatably arranged at the center of the upper surface of this clamper F, and an inverted conical protrusion H that can be freely fitted into an inverted conical recess formed at the center of the truncated conical section D is projected on the lower surface of the ball G. A flange portion I is formed on the outer periphery of the clamper F.

J is a clamper holder, one end of which is rotatably connected by a pin K. Furthermore, a hook L is formed at the other end of the clamper holder J, and is engageable with the above-mentioned flange I portion. Although not shown, the above-mentioned clamper holder J is normally configured to open and close integrally with the lid of the player.

Next, the operation of the above embodiment will be explained.
First, when compact disc A is to be clamped during performance, compact disc A is placed on disc table C. Next, the clamper holder J is moved by an external force such as closing the lid of the player.
Rotate counterclockwise around pin K as a fulcrum,
When the clamper F suspended by the hook L of the clamper holder J is lowered onto the disk table C,
The clamper F presses and fixes the compact disk A onto the disk table C via the ball G, and the inverted conical protrusion H fits into the inverted conical recess.
At this time, the flange portion I and the hook L are not in contact with each other, and the ball G is in point contact with the clamper holder J.
As a result, the compact disk A rotates smoothly.

Next, clamp release will be explained. Clamper holder J is removed by external force such as opening the player lid.
When the clamper F is rotated clockwise about the pin K as a fulcrum, the clamper F suspended by the hook L of the rising clamper holder J is separated from the disk table C and the clamp is released. After that, the compact disk A is removed from the top of the disk table C.

The conventional clamping device for compact disks is
The device is configured as described above, and since the part that actually clamps compact disc A is the inner periphery that is crimped by clamper F, undulating vibrations occur on the outer periphery of compact disc A, causing the pick-up. This caused track jumps and fluctuations in the voltage used to servo the pick-up.

``Means for Solving the Problems'' Therefore, the present invention was made to solve the above-mentioned drawbacks, and it is designed to be integrated with a clamper that presses the disk onto the disk table on which the disk is placed and rotated. A damper is provided on the lower surface of the outer periphery of the disk portion and can freely come into contact with the disk table, and the damper is engaged with a flange portion formed on the outer periphery of the clamper. A clamper holder whose one end is rotatably pivoted so as to raise and lower the clamper, and a clamper holder on the opposite side of the pivoting part of the clamper holder that abuts the disc part when raised and positions the disc part in a horizontal state. It consists of a regulating stopper.

"Embodiments" The present invention will be described below based on embodiments shown in the drawings. FIG. 1 is a vertical cross-sectional view showing the main parts of a compact disk clamping device according to the present invention, and FIG. 2 is a vertical cross-sectional view showing the same clamp in a released state.

In the above drawing, 1 is a disk such as a compact disk or a video disk, 2 is its center hole, and 3 is a disk table on which the disk 1 is placed.The diameter of this disk table 3 is as follows.
It is set to have approximately the same diameter as the inner peripheral portion of the disk 1, and a truncated conical portion 4 that fits into the center hole 2 and positions the disk 1 projects from the center thereof. This disk table 3 is fixed to a rotating shaft 5 of a motor (not shown).

6 is a circular clamper for pressing the disk 1 onto the disk table 3. A ball 7 is rotatably disposed at the center of the upper surface of the clamper 6, and an inverted conical protrusion 8 that can freely fit into the inverted conical recess 4a formed at the center of the truncated cone section 4 is provided at the center of the lower surface. It is installed protrudingly. Further, a disk portion 9 which is larger than the outer diameter of the clamper 6 and smaller than the diameter of the disk 1 is formed at the lower part of the outer periphery of the clamper 6 . A ring-shaped damper 10 is provided on the lower surface of the outer periphery of the disk portion 9 to absorb vibrations of felt, etc., which can freely come into contact with the disk 1. Also,
A flange portion 11 is formed on the outer periphery of the clamper 6 above the disk portion 9.

12 is a clamper holder, one end of which is a pin 13
It is rotatably pivoted. Further, a hook 14 is formed at the other end of the clamper holder 12 and can be freely engaged with the flange portion 11 described above. In addition,
Although not shown, the above-mentioned clamper holder 12 is normally configured to open and close integrally with the lid of the player. Reference numeral 15 denotes a stopper, and this stopper 15 is arranged at a position opposite to the position of the pin 13 so as to be able to come into contact with the rising disk 1 as described later.

Reference numeral 16 denotes a disk conveying section that conveys the disk 1 onto the disk table 3.

"Operation" Next, the operation of the above embodiment will be explained.
First, when the disc 1 is to be clamped during performance, the disc 1 is placed on the disc table 3. Next, when an external force such as closing the lid of the player is applied to the clamper holder 12, the clamper holder 12 rotates counterclockwise about the pin 13, and the clamper suspended by the hook 14 engaged with the flange portion 11 is rotated. 6 descends onto the disk table 3. As a result, the clamper 6 presses and fixes the inner peripheral part of the disc 1 onto the disc table 3 via the ball 7, and the damper 10 of the disc part 9 comes into contact with the upper peripheral surface of the disc 1, and the inverted conical protrusion 8 fits into the inverted conical recess 4a of the truncated cone portion 4. At this time, the flange portion 11 and the hook 14 are in a non-contact state, and the ball 7 is attached to the clamper holder 12.
make point contact with. As a result, the disk 1 rotates smoothly.

Next, clamp release will be explained. Clamper holder 1 is removed by external force such as opening the lid of the player.
When the disk 2 is rotated clockwise, the clamper 6 and the damper 10 of the disk portion 9 are separated from the upper surface of the disk 1 by the rising hook 14 of the clamper holder 12, and the clamp is released. At this time, the disc part 9
Due to the structure of the hook 14, as shown by the dotted line in FIG. 2, the pin 13 side is low and the opposite side is high. When the disc portion 9 rises in this state,
The pin 13 side contacts the disk transport section 16 and obstructs the movement of the disk transport section 16.
Since the opposite side of the disc part 9 collides with the stopper part 15, the pin 13 side of the disc part 9 is lifted and placed in a horizontal state, and the disc transport part 16 becomes movable. After that, the disk 1 is removed from the top of the disk table 3.

"Effects of the Invention" As mentioned above, the present invention includes a disk table 3 on which the disk 1 is placed and rotated, and a clamper 6 that presses the disk 1 onto the disk table 3.
The clamper 6 is formed integrally with this clamper 6.
, a damper 10 provided on the lower surface of the outer periphery of the disk portion 9 and capable of contacting the disk table 3, and a flange 11 formed on the outer periphery of the damper 10. A clamper holder 12 is rotatably pivoted at one end so as to raise and lower the clamper 6 and the disc part 9 together, and a clamper holder 12 is provided on the opposite side of the pivot part of the clamper holder 12 and is in contact with the disc part 9 when it is raised. The damper 10 absorbs the vibrations of the outer circumference of the disk 1, and prevents voltage fluctuations and track jumps for the pickup-related servos caused by vibrations. The phenomenon can be removed. Since the disk portion 9 is horizontally regulated by the stopper 15 when it is raised, it can be prevented from colliding with the disk conveyance section 16 that conveys the disk.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing the main parts of the disk clamping device according to the present invention, Fig. 2 is a longitudinal cross-sectional view in the dynamic clamp release state, and Fig. 3 is a longitudinal cross-sectional view showing the main parts of the conventional disk clamping device. FIG. 1...Disk, 3...Disk table, 6
... Clamper, 9 ... Disc part, 10 ... Damper,
11...Flange part, 12...Clamper holder,
15...stopper, 16...disk transport section.

Claims (1)

[Scope of utility model registration request] A disk table on which the disk is placed and rotated, a clamper that presses the disk onto the disk table, a disk portion formed integrally with the clamper and having a diameter larger than the diameter of the clamper, and an outer peripheral portion of the disk portion. a damper provided on the lower surface and capable of freely contacting the disk table; a clamper holder having one end rotatably pivoted so as to engage with a flange formed on the outer periphery of the clamper to raise and lower the clamper;
A clamping device for a compact disk, characterized in that a stopper is provided on the opposite side of the pivoting part of the clamper holder to abut against the disc part when it is raised to regulate the position of the disc part in a horizontal state.