JPH073722B2 - Disk clamp device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc clamping device such as a CD player and the like. By clamping a disc by inserting a protrusion of a clamper into a recess of a central portion of a turntable, The thickness from the disk surface in the clamped state in the upward direction is significantly thinner than the conventional one.

2. Description of the Related Art A conventional disk clamp device has a structure shown in FIG. That is, when the disc is played, the clamper 3 attracted to the magnet 2 attached to the turntable 1 rotates together with the disc 5 by the rotation of the turntable 1 without touching the clamper support 4 provided on the lid side.

Then, when the clamper 3 is peeled off from the turntable 1, the clamper receiving portion 3a provided on the outer peripheral portion of the clamper 3 is engaged with the support portion 4a of the clamper support 4 so as to be pulled up. There is.

However, in such a structure, when the disk 5 is clamped, the clearance A between the disk 5 and the support portion 4a of the clamper support 4 and the clamper support are provided on the upper surface of the disk 5. Clearance margin B between the support part 4a of 4 and the clamper receiving part 3a,
It is necessary to have a total of 3 clearances for C. Further, the thickness including the material thickness of the clamper 3 and the clamper support 4 is required. Therefore, the disc clamping device as a whole is extremely thick.

Therefore, an object of the present invention is to significantly reduce the thickness required in the upward direction from the top surface of the disk by reducing the necessary space clearances on the top surface of the disk as much as possible.

Means for Solving the Problems In order to achieve the above object, the present invention provides a turntable on which a disc is placed and rotated, and a recess and a disc provided substantially in the center of the turntable are placed on the turntable from above. A clamper that has a magnetic body to be clamped and has a convex portion at approximately the center, a magnet that is provided in a concave portion of the turntable to attract the clamper, and a clamper that has a convex portion at approximately the center and that is detachable from the turntable A clamper support, an engaging portion provided on a convex portion of the clamper support, and a locking portion provided on the convex portion of the clamper and engaging with the engaging portion of the clamper support,
The protrusion of the clamper support and the protrusion of the clamper are inserted into the recess of the turntable.

Function The present invention is configured such that the protrusions of the clamper, the protrusions of the clamper, and the protrusions of the clamper support are inserted into the turntable as described above, so that the material thickness of the clamper at the time of clamping on the upper surface of the disc. Since it can be constructed by requiring only one clearance clearance with the clamper support, the thickness in the upward direction from the top surface of the disk can be made significantly thinner than the conventional one.

Embodiment FIG. 1 shows an embodiment of the disc clamp device of the present invention. In FIG. 1, 6 is a clamper having a convex portion 6a protruding downward in a substantially central portion, 7 is a clamper support having a convex portion 7a protruding downward in a substantially central portion and a center hole 7b, 8
Is a shaft for attaching and detaching the clamper provided on the convex portion 6a of the clamper 6,
Reference numeral 9 is a disk, 10 is a turntable having a recess 10a in its substantially central portion, and 11 is a magnet housed in the recess 10a of the turntable 10.

The clamper convex portion 6a is inserted into the concave portion 10a provided in the substantially central portion of the turntable 10 when the disc is clamped, and the magnet 1 attached to the concave portion 10a of the turntable 10 is provided.
It is designed to be attached to 1 and clamped. Further, the protrusion 7a is also provided on the clamper support 7, and the clamper shaft 8 is attached to the protrusion 6a of the clamper 6 through the center hole 7b of the protrusion 7a of the clamper support 7, and the head provided on the clamper shaft 8 is attached. The diameter of the portion 8a is larger than the diameter of the hole 7b of the clamper support 7. Therefore, when the clamper support 7 moves upward so as to remove the clamper 6 from the turntable 10, the head 8a of the clamper shaft 8 engages with the hole 7b of the clamper support 7 and the clamper 6 is lifted upward. Then, the turntable 10 is peeled off. Further, in the drawing, a gap is provided between the magnet 11 and the clamper 6 so that the attraction force of the magnet 11 is surely transmitted to the disk 9.

As described above, by providing the mounting / dismounting portion of the clamper 6 to / from the turntable 10 in the recess 10a of the turntable 10, the portion where a clearance margin between the clamper 6 and the clamper support 7 during the disc clamping is required is the disc. The thickness required in the upper direction of the upper surface can be made smaller than in the past.

As described above, according to the present invention, there is provided a turntable on which a disc is placed and rotated, a concave portion provided substantially in the center of the turntable, and a magnetic body which mounts the disc on the turntable and clamps it from above. And a clamper having a convex portion at substantially the center thereof, a magnet provided in the concave portion of the turntable for attracting the clamper, a clamper support having a convex portion at the substantially center for attaching and detaching the clamper to and from the turntable, and the clamper. An engaging portion provided on the convex portion of the support and a locking portion provided on the convex portion of the clamper and engaging with the engaging portion of the clamper support, wherein the convex portion of the clamper support and the convex portion of the clamper are Since it is inserted in the recess of the turntable, the clamper and the clamper support can be engaged in the recess of the turntable.
The thickness of the upper surface of the disc in the upward direction can be made significantly thinner than the conventional one.

[Brief description of drawings]

FIG. 1 is a sectional view of a disk clamp device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example. 6 ... clamper, 6a ... projection, 7 ... clamper support, 7a ... projection, 7b ... center hole, 8 ... clamper attachment / detachment shaft, 8a ... head, 9 ... disk, 10 ... … Turntable, 10a… recess, 11… magnet.

Claims (1)

[Claims] 1. A turntable on which a disc is placed and rotated, a recess provided substantially in the center of the turntable, and a magnetic body for placing the disc on the turntable and clamping it from above and having a protrusion in the approximate center. A magnet for attracting the clamper provided in the concave portion of the turntable, a clamper support having a convex portion substantially at the center for attaching and detaching the clamper to and from the turntable, and a convex portion of the clamper support. The engaging portion and the engaging portion provided on the convex portion of the clamper for engaging with the engaging portion of the clamper support, and inserting the convex portion of the clamper support and the convex portion of the clamper into the concave portion of the turntable. A disc clamp device.