JPH0573744U - Disc player turntable device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a turntable device which does not damage a bearing of an electric motor when a turntable on which a disk is mounted is attached to a rotating shaft of the electric motor. A positioning member 5 is inserted into a rotating shaft 2 of an electric motor 1 and then fixed to the rotating shaft 2 with an adhesive, and a turntable 6 is press-fitted into the rotating shaft 2 to position the positioning member 5 The turntable 6 is positioned by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc player, and more particularly to a turntable device on which a disc is placed.

[0002]

[Prior Art]

 Optical disc players that use an optical pickup to optically read a signal recorded on a disc and write a signal to the disc are widely used. It is equipped with a turntable that is placed and rotates the disc at high speed.

As a typical optical disc player, a CD player is well known. Among such CD players, a headphone stereo type that is configured to listen to a reproduced sound through headphones is used. There is a portable CD player. Since such a headphone stereo type portable CD player is used while being carried, there is a demand for downsizing and particularly thinning of the device body. A turntable used in such a CD player is disclosed in, for example, Japanese Utility Model Laid-Open No. 3-23847.

[0004]

[Problems to be solved by the device]

 The turntable in the CD player is mounted so as to rotate integrally with the rotating shaft of the electric motor, and the mounting is performed by press-fitting into the rotating shaft. The pressure input when such a turntable is press-fitted into the rotary shaft of the electric motor varies greatly, for example, from 10 kg to 30 kg due to variations in parts. As a result, a bearing or the like provided to support the rotating shaft of the electric motor may be damaged. The present invention is intended to provide a turntable device in which such a point is improved.

[0005]

[Means for Solving the Problems]

 The turntable device of the present invention includes a turntable that is press-fitted into a rotary shaft of an electric motor and has a disk mounted thereon, and a metal that is fitted into the rotary shaft and is fixed to the rotary shaft by an adhesive. And a positioning member made of metal.

[0006]

[Action]

 According to the present invention, the positioning member fixed to the rotary shaft of the electric motor by the adhesive force of the adhesive positions the turntable with respect to the rotary shaft.

[0007]

【Example】

 FIG. 1 is a sectional view of an essential part showing a turntable device of the present invention. In the figure, reference numeral 1 is an electric motor for rotationally driving a disk D, which has a rotary shaft 2 protruding upward and is fixedly mounted on a fixed substrate 3. Numeral 4 is a washer that is press-fitted and fixed below a protruding portion that constitutes the rotating shaft 2, and 5 is a metal positioning member that is inserted into the rotating shaft 2 and is inserted to a position where the washer 4 comes into contact therewith. It is a member and is fixed to the rotary shaft 2 by an adhesive.

A turntable 6 is made of synthetic resin and press-fitted into the rotary shaft 2 so as to be rotationally driven by the electric motor 1. The turntable 6 has a mounting portion 7 on which a disk D is mounted and the positioning means. An engaging portion 8 that engages with the working member 5 and an annular rib 9 that has elasticity are formed.

Reference numeral 10 denotes a disc holding member which is attached to the annular rib 9 of the turntable 6 so as to rotate integrally with the turntable 6 and which fits into a central hole provided in the disc D. Reference numeral 11 denotes a ball bearing which is provided in the disc holding member 10 and is urged outward by the spring 12 about the rotary shaft 2, and presses the disc D onto the mounting portion 7 of the turntable 6. It has the effect of placing it.

The turntable device of the present invention is constructed as described above. Next, the assembling operation will be described. A washer 4 is press-fitted onto the rotary shaft 2 of the electric motor 1 from above and fixed in a predetermined position. At this time, since the pressure input of the washer 4 may be small, no large force is applied to the bearing of the electric motor 1. After the washer 4 is press-fitted onto the rotary shaft 2, the metal positioning member 5 is fitted to a position where it comes into contact with the washer 4.

After the positioning member 5 is fitted into the rotary shaft 2 as described above, an adhesive is inserted into the gap between the positioning member 5 and the rotary shaft 2 to fix the positioning member 5. The rotary shaft 2 is fixed by adhesion. As such an adhesive, for example, an anaerobic adhesive can be used. When the bonding operation of the positioning member 5 is performed, the washer 4 has a function of preventing the adhesive from protruding downward, that is, inward of the electric motor 1.

After the fixing and fixing of the positioning member 5 to the rotary shaft 2 is completed, a turntable 6 made of synthetic resin is press-fitted into the rotary shaft 2, and the press-fitting operation is performed by engaging the turntable 6. This is performed until the portion 8 engages with the positioning member 5. When such press-fitting operation is performed and the engaging portion 8 of the turntable 6 engages with the positioning member 5, the positioning member 5 is firmly fixed to the rotary shaft 2 with an adhesive, The turntable 6 is firmly attached to the downward force. Therefore, the pressure input to the rotary shaft 2 of the turntable 6 may be small, and a large force is not applied to the bearing of the electric motor 1.

The mounting operation of the turntable 6 to the rotary shaft 2 is performed as described above. After the mounting operation is performed, the disc holding member 10 is press-fitted into the annular rib 9 of the turntable 6 to The disc holding member 10 can be attached to the turntable 6. The press-fitting operation of the disc holding member 10 into the turntable 6 is performed as described above. In order to reduce the elastic force of the annular rib 9 applied to the rotary shaft 2 when the press-fitting operation is performed, the turntable 6 is rotated. Distortion does not occur in the shaft hole of 6, and the surface wobbling of the disk D can be prevented.

[0014]

[Effect of the device]

 In the turntable device of the present invention, the metal positioning member is fixed to the rotary shaft of the electric motor with an adhesive, and the positioning member is used to position the turntable relative to the rotary shaft. Even if the pressure input to the table is small, there is an advantage that the supporting force of the turntable against the pressing force in the disc insertion direction can be increased. Therefore, it is possible to solve the problem that the bearing and the like of the electric motor are damaged by the pressure input to the rotary shaft of the turntable.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a turntable device according to the present invention.

[Explanation of symbols]

 1 Electric Motor 2 Rotating Shaft 4 Washer 5 Positioning Member 6 Turntable 10 Disc Holding Member D Disc

Claims (2)

[Scope of utility model registration request] 1. A disc player equipped with a turntable in which a disc is placed and which is press-fitted into a rotary shaft of an electric motor, and is made of metal which is fitted into the rotary shaft and is fixed to the rotary shaft by an adhesive. 2. A turntable device for a disc player, wherein the positioning member is provided, and the positioning member positions the turntable with respect to the rotary shaft. 2. A disk player provided with a turntable in which a disk is placed while being press-fitted into a rotary shaft of an electric motor, and a washer press-fitted and fixed to the rotary shaft and an adhesive which is fitted into the rotary shaft. And a metal positioning member that is fixed to the rotary shaft by an adhesive and positions the turntable with respect to the rotary shaft, and the washer prevents the adhesive from protruding toward the electric motor. A turntable device for a disc player.