JPS63155453A - Disk fixing mechanism - Google Patents

Abstract

PURPOSE:To eliminate the need of a clamper for fixing a disk, and to thin a device by providing a bearing held by an elastic plate spring, in the center of a turntable. CONSTITUTION:In the center of a turntable 2 fixed to a spindle shaft 1, a bearing 4 is held by an elastic plate spring 3. The bearing 4 performs the entry convenience and positioning functions of a hole of a disk 5-a being in the course of loading, the plate spring 3 is deformed to the inside, and also, the bearing 4 rotates and the disk 5-a is dropped to the turntable surface, and by the recovery of the plate spring 3, the disk 5-a is inserted and held by the bearing 4 and the turntable 2. In such a way, a clamper for fixing the disk becomes unnecessary, and an arm operating area for moving up- and down its clamper is also unnecessary, therefore, a device can be thinned.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk fixing mechanism for mounting and fixing a disk on a turntable.

[Conventional technology]

Conventionally, this type of disk fixing mechanism includes a turntable and a clamper.

That is, in FIG. 2, a turntable 22 is fixed to a spindle shaft 21, and a tapered centering cone 23 is provided at the center of the turntable 22. As shown in FIG. The disk 24 is guided and positioned by a centering cone 23 and is pressed against the turntable 22 by a clamper 25. Arm 2 centered around fulcrum 28
At 7, there is a clamper housing 26 that holds the clamper 25.
have.

Referring to FIG. 3, the turntable 2 is mounted on a spindle shaft 31, and a spring 34 is inserted between a centering cone 33 which is fitted onto the spindle shaft 31 and is slidable up and down. Centering is performed by guiding and vertically moving the tapered centering cone 33, and the clamper 36 presses the disk 35 against the turntable 32. An arm 38 with a fulcrum 39 as its center of rotation holds a clamper 36 and a clamper housing 3.
7.

[Problem that the invention seeks to solve]

The conventional disk fixing mechanism described above requires a clamper to fix the disk, and the arm operating area for moving the clamper up and down occupies a large space.
A disadvantage is that it is difficult to make the device with the disk fixing mechanism thinner.

[Means for solving problems]

The disk fixing mechanism of the present invention includes a turntable on which the disk is placed, and a bearing provided at the center of the turntable and held by an elastic leaf spring or the like.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a front view and a plan view of an embodiment of the present invention.

A bearing 4 is held in the center of a turntable 2 fixed to a spindle shaft 1 by an elastic leaf spring 3. Here, the outer circumferential diameter of the bearing is also set to be slightly larger than the hole diameter of the disk 5.

Since the shape of the bearing 4 is cylindrical, the bearing 4
functions to insert and position the disc 5-a in the hole during loading, and the loading force causes the plate spring 3 to deform inward and the bearing 4 to rotate, causing the disc 5-a to fall onto the turntable surface. Due to the recovery of the leaf spring 3, the disk 5-a is held between the bearing 4 and the turntable 2. Furthermore, when the disc 5 is held eccentrically, each leaf spring 3 tends to receive the same load, so that a correction force acts on the disc 5.

〔Effect of the invention〕

As explained above, the present invention has a bearing held in the center of the turntable by an elastic plate spring, thereby eliminating the need for a glue 2 clamper for fixing the disc, and an arm for moving the clamper up and down. Since no operating area is required, there is an effect that the device equipped with the disk fixing mechanism can be made thinner.

[Brief explanation of the drawing]

FIG. 1 is a front view and a plan view of a disk fixing mechanism of the present invention, and FIGS. 2 and 3 are front views of a conventional disk fixing mechanism. 1... Spindle shaft, 2... Turntable, 3... Leaf spring, 4... Bearing, 5... Disc, 5- a...Disc being loaded.

Claims (1)

[Claims] A disk fixing mechanism comprising: a turntable for mounting and fixing a disk on the turntable; and a bearing provided at the center of the turntable and held by an elastic body.