JPH087464A - Structure for arranging disk turn table - Google Patents

Abstract

PURPOSE:To eliminate the influence by clattering of a motor for driving by forming a gradient in a spacing between a turn table and a mechanical chassis, etc., and generating a pressure difference in air flow by rotation of the turn table. CONSTITUTION:The turn table 2 on which a disk 1 is placed is connected via a revolving shaft 3 to the driving motor 4. At this time, the mechanical chassis 5 under the table 2 is formed to a cylindrical shape and the gradient is formed on the surface facing the table 2. The pressure difference is generated in the flow of the air under the table 2 by forming such gradient, by which the pressure is applied on the table 2 and the influence of the clattering of the driving motor 4 is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a disk rotary table and a drive motor in a precision device such as a CD-ROM, and more particularly to a disk rotary table arrangement structure having an effect of preventing vibration due to motor play.

[0002]

2. Description of the Related Art A disk rotary table of this kind is rotated by being connected to a rotary shaft of a drive motor, but vibration may occur due to motor backlash. In this case, a read error may occur when reading data from a CD. there were.

Conventionally, there has been one for removing backlash of a motor for driving a disk rotary table as shown in FIGS. FIG. 2 utilizes the attractive force of the magnetic force of the magnet, and FIG. 3 utilizes the spring force. By applying a load such as lateral pressure by these means, the backlash of the motor is removed.

[0004]

The prior art shown in FIGS. 2 and 3 uses parts such as magnets and springs to apply some lateral pressure to the rotary table or motor shaft in order to remove the backlash. There was a drawback that the structure became complicated. Further, these parts have drawbacks such as an increase in cost and a change in load over time.

[0005]

In order to solve the above problems, the present invention has an arrangement structure of a disk rotary table in which a gap between the rotary table and a mechanical chassis or the like installed below the rotary table is a square.

With the above structure, a pressure difference is generated in the flow of air under the rotary table, and the dynamic pressure exerts pressure on the rotary table to remove the backlash of the motor.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. 1A and 1B are views showing an embodiment of the present invention, FIG. 1A is a side view, and FIG. 1B is a view seen from the direction AA of FIG.

In the figure, a rotary table 2 on which a disc 1 is mounted is connected to a drive motor 4 via a rotary shaft 3. In the present invention, the mechanical chassis 5 under the rotary table 2 is formed into a cylindrical shape, and the slope 5a is provided on the surface facing the rotary table 2. By providing such a gradient 5a, a pressure difference is generated in the flow of air under the table 2, pressure is applied to the rotary table, and the influence of rattling of the drive motor is removed.

[0009]

According to the present invention, it is possible to obtain a backlash removal effect equivalent to that of the prior art without increasing the number of parts. Further, since the flow of air is used, there is an effect that the influence over time is eliminated.

[Brief description of drawings]

1A and 1B are configuration diagrams of an embodiment of the present invention, in which FIG. 1A is a side view and FIG. 1B is a view taken along the line AA of FIG.

FIG. 2 is a diagram showing a conventional technique using a magnet.

FIG. 3 is a diagram showing a conventional technique using a spring.

[Explanation of symbols]

 1 disk 2 rotary table 3 rotary shaft 4 drive motor 5 mechanical chassis 6 magnet 7 spring

Claims (3)

[Claims] 1. An arrangement structure of a disk rotary table, comprising: a disk rotary table; and a drive motor, wherein a gap between the rotary table and a mechanical chassis located under the rotary table is changed so as to apply air pressure to the rotary table. . 2. An arrangement structure of a disk rotary table comprising a drive motor, a rotary table which is connected to the drive motor and which is arranged on a chassis, and a gradient which is provided on a chassis surface with respect to the rotary table. 3. The arrangement structure of the disk rotary table according to claim 1, wherein a chassis surface under the rotary table is projected, and an end surface is inclined with respect to the rotary table.