JPS58161186A - Automatic aligning mechanism of disk - Google Patents

Abstract

PURPOSE:To align a disk precisely and automatically by pressing a spherical arraying tool in a spindle against a spring coaxially with the center axis of rotation of the spindle and mounting the disk to the circumferential edge of the spherical arraying tool. CONSTITUTION:The ball 6 has a larger external diameter than the hole diameter of the disk 3 and when the disk 3 is supplied to the peak of the spindle 1, i.e., the ball 6, the ball 6 contacts the internal edge of the hole of the disk 3 to support the disk end to compress the spring 8 by the weight of the disk 3. Then, the disk supplied eccentrically while the ball 6 sinks is led to a correct position. Thus, the disk is aligned automatically with high alignment precision.

Description

DETAILED DESCRIPTION OF THE INVENTION Objects of the Invention The present invention relates to an automatic centering mechanism for a disc clamp device in a disc recording/reproducing apparatus using video discs, digital optical discs, and the like.

Prior Art Conventionally, this type of automatic alignment mechanism has been developed, for example, in Japanese Patent Application Laid-open No. 6
As disclosed in Japanese Patent No. 3-27408, a conical guide part is provided on the drive spindle (hereinafter simply referred to as "spindle") side, and alignment is achieved by this guide part and the inner edge part of the hole in the disk. There are things that do this.

However, this mechanism has the drawback that if the disk is inserted diagonally, it may remain fixed, and highly accurate alignment cannot be performed.

Purpose of the Invention The present invention has been made in view of the above-mentioned circumstances, and its purpose is to eliminate the above-mentioned drawbacks of the conventional self-aligning mechanism for disks and to obtain high alignment accuracy. The purpose is to provide a self-aligning mechanism.

The gist of the present invention is that, in a disk clamp device for mounting a disk onto a spindle using a hub, a spherical aligner is provided which can be press-fitted into the spindle against a spring so as to be coaxial with the rotation center axis of the spindle. hand,
The automatic centering mechanism is configured to perform centering by attaching a disk to the periphery of the spherical alignment.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Embodiment of the Invention FIG. 1 is an 11-page diagram showing an outline of a disk drive device equipped with a self-aligning mechanism, which is an embodiment of the invention. In the figure, 1 is a spindle, 2 is a hub, and 3 is a disk. It is. Further, the number is a spindle driving motor, and the number 8 is a cover of the device.

2 and 3 are enlarged cross-sectional views showing the inside of the circle in FIG. 1, and FIG.
indicates the situation when the disc is installed. Figure 2, 1
In Fig. 13, 6 is a ball, 7 is a ball holder, and 8 is a spring.

The ball 6 is fitted into a hole provided in the spindle l by a ball presser 7 via a spring 8, and is rotated downwardly in the figure on the spindle If) rotation center axis 9 against the spring 8. It is mobile and has 11I power.

The hub 2 has two disc holders on its lower surface (the part that contacts the disc) that have rubber pads supported via springs 2B, and when the hub 2 is brought into contact with the disc 5, The two disc holders fix the disc 3 to the spindle 1 via the spring 2B.

The operation of the apparatus of this embodiment will be explained below.

Since the ball 6 has an outer diameter larger than the hole diameter of the disk 3, when the disk 3 is supplied to the top of the gas spindle 1, that is, the ball 6, the ball 6 and the disk 3
It is supported by the shadow that touches the inner edge of the hole. When the weight of the disc 3 compresses the spring 8 and the ball 6 sinks, in the case of an eccentrically supplied disc 3, the curved surface of the ball 6 guides the disc 3 to the correct position. It performs a so-called automatic alignment operation.

After the above automatic alignment operation is completed, if the disk 3 is fixedly moved to the top of the spindle 1 by the hub 2, it is possible to maintain high alignment accuracy.

It is important that the ball 6 be processed to have a high degree of roundness and a smooth surface, and in this respect as well, being a ball is advantageous over balls of other shapes. As for the material of the ball 6, it is preferable to use a sharp base material and apply hard plating to the base material.

Effects of the Invention As described above, according to the present invention, in a disk clamping device that attaches a disk to a spindle using a hub, As shown in FIG. This demonstrates the remarkable effects that can be achieved.

[Brief explanation of the drawing]

Figure 1 is a side view of a disk drive device equipped with an automatic centering mechanism which is an embodiment of the present invention, and Figures 2 and 3 are cross-sectional views showing its details. , 1 spindle, 2: hub, 3: disc, motor: 6: ball, 7: pole holder, 8 spring,
9. Spindle rotation center axis. Special! Person from F Hitachi, Ltd. Figure 1 Figure 2

Claims (1)

[Claims] In a disk clamping device for mounting a disk on a drive spindle using a hub, a spherical aligner is provided that can be press-fitted into the drive spindle against a spring so as to be coaxial with the rotation center axis of the drive spindle, and the disk An automatic disk centering mechanism, characterized in that it is configured to perform centering by attaching a spherical aligner to the periphery of the spherical aligner.