JP2002269962A - Vibration isolator for disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolator for a disk player capable of reproducing a signal recorded in a disk and recording a signal in the disk with a beam of laser emitted by an optical pickup. SOLUTION: A disk player provided with a driving base board 1 on which a spindle motor for rotary-driving the disk is fixed and also a through-hole 1A for the optical pickup 2 is formed in a top face board 1B, and a supporting plate part 1C successively provided downward from the top face board 1B is fixedly supported on a fixed board 3 by main vibration isolating members 4, 5, 6, and 7, is provided with a vibration isolating member 10 fixedly supported by sub-vibration isolating members 11, 12, and 13 on the supporting plate part 1C of the driving base board 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk player capable of performing a reproducing operation of a signal recorded on a disk and a recording operation of recording a signal on the disk, and more particularly to a vibration isolator.

[0002]

2. Description of the Related Art Disk players which read signals recorded on a disk using an optical pickup have become widespread. Such a disk player has a turntable on which the disk is placed. . The disc placed on the turntable is fixedly held on the turntable so as to rotate with the turntable by means called a clamp,
A device utilizing the attraction force of a magnet has been developed as the clamping means. In the technique of performing the clamping operation of the disk by using the attraction force of the magnet, a magnetic material to be attracted by the magnet is provided on the turntable side. Such a turntable is disclosed in Japanese Utility Model Laid-Open No. 21354/1993. Something was done.

[0003] As a disk player, a CD player is generally used, but recently, a CD called a CD-ROM for recording a data signal used by a computer, not a sound signal of music or the like, is reproduced. -Disk players called ROM players are widespread. In addition, a recording / reproducing type of disc player which can record a signal on the disk as well as a reproducing operation of a signal recorded on the disk has been widely used.

[0004]

The CD-ROM player, unlike the CD player that reproduces an audio signal, requires a high-speed reading operation of a signal. 2. Description of the Related Art Disk players configured to perform a signal reading operation by rotating a disk at a high linear speed such as 8 times, 10 times, and 12 times have been commercialized.

In order to rotationally drive the disk so that the linear velocity becomes constant at a high speed, an expensive spindle motor with good characteristics and a high-precision drive control circuit are required. Disc players have been commercialized so as to control the angular velocity not to be constant but to keep the angular velocity constant.

[0006] Among disks used in such a disk player, there is a disk called an eccentric disk whose center of gravity is shifted from the center. When such a disk is rotated at high speed, abnormal vibration occurs. However, there is a problem that abnormal noise is generated. The characteristic diagram shown in FIG. 4 shows the relationship between the frequency of vibration and the level of vibration when the disk rotates, and the level of vibration becomes highest at the resonance frequency f0, and the rotational characteristics of the disk deteriorate. I do.

As a method for solving such a problem, for example, a turntable device using steel balls as disclosed in Japanese Patent Laid-Open No. 10-302383 has been developed. There is a problem that the balls collide with each other and generate noise.

An object of the present invention is to provide an anti-vibration device for a disk player which solves the above problem.

[0009]

According to the present invention, there is provided an anti-vibration apparatus comprising: a disk having a driving substrate fixedly supported by a main anti-vibration member on a fixed substrate while a spindle motor for rotating and driving the disk is fixed. In the player, an anti-vibration substrate fixedly supported by a sub-vibration anti-vibration member is provided on the driving substrate.

[0010]

FIG. 1 is a plan view showing an embodiment of a vibration isolator according to the present invention, FIG. 2 is a side sectional view showing a main part of the vibration isolator according to the present invention,
FIG. 3 is a vibration characteristic diagram of the vibration isolator of the present invention.

In FIG. 1, reference numeral 1 denotes an upper surface plate 1B in which a through hole 1A for an optical pickup 2 for reading out a signal recorded on a disk is formed, and is provided continuously below the upper surface plate 1. A drive board comprising a support plate portion 1C, on which a spindle motor (not shown) for rotating and driving the disk is fixed, and which is supported by the main vibration isolating members 4, 5, 6 and 7 on the fixed board 3; It is attached and fixed by the support operation of the plate portion 1C. Reference numeral 8 denotes a turntable fixed to a rotary shaft 9 of the spindle motor, and has a mounting portion 8A on which a disk is mounted.

The optical pickup 2 is provided so as to be displaceable in the radial direction of the disk, that is, in the directions of arrows A and B by a guide member (not shown) provided on the driving substrate 1. The pickup is configured to be displaced by a pickup driving motor (not shown) fixed on the driving substrate 1. Also,
The laser light emitted from the optical pickup 2 is applied to the signal surface of a disk placed on the turntable 8 through a through hole 1A formed in the driving substrate 1 and recorded on the disk. It is configured to perform a signal reading operation.

Numeral 10 denotes an anti-vibration substrate, which is formed in a U-shape as shown in FIG. 1 and which has auxiliary anti-vibration members 11, 12 and 1 on a support plate 1C constituting the driving substrate 1.
3 for fixed support. The anti-vibration substrate 13 is formed in a U-shape.
Are arranged between the upper surface plate 1B and the support plate portion 1C. By arranging the anti-vibration substrate 13 between the upper plate 1B and the support plate 1C constituting the driving substrate 1 in this manner, the thickness can be reduced. Further, the position of the center of gravity of the vibration isolation substrate 10 is configured to be located on the rotation center axis of the spindle motor, that is, on the axis of the rotation shaft 9.

In such a configuration, the elastic coefficient is set so that the frequency of vibration damping by the main vibration isolating members 4, 5, 6 and 7 supporting the driving substrate 1 is 35 Hz, for example. The elastic coefficient is set so that the frequency of vibration isolation by the sub-vibration isolation members 11, 12, and 13 supporting the disk 10 becomes a frequency corresponding to a target rotation speed, for example, 100 Hz, in order to improve the rotation characteristics of the disk. . FIG. 3 is a vibration characteristic diagram according to the present invention. As is clear from FIG. 3, the vibration level of the resonance frequency f0 can be reduced. By reducing the portion of the resonance frequency f0, that is, the portion between the valleys in the characteristic diagram, the rotation characteristics of the disk at the target rotation speed can be improved. The best characteristics were obtained when the ratio of 1 to the weight was set to about 1: 5.

In the characteristic diagram shown in FIG. 3, f0 is a frequency corresponding to the target rotational speed, that is, a frequency at which vibration is to be suppressed by the vibration isolating substrate 10, and in this case, 100
Hz, f1 and f2 are around 60 Hz and 16 respectively.
The frequency is around 0 Hz.

In this embodiment, the shape of the anti-vibration substrate 10 is expressed as a U-shape, but the shape can be variously modified.

[0017]

According to the present invention, there is provided a support plate portion in which a spindle motor for rotating a disk is fixed, a through hole for an optical pickup is formed in an upper plate, and a lower portion is provided below the upper plate. In a disk player having a driving substrate fixedly supported by a main vibration isolating member on a fixed substrate, a vibration isolating substrate fixedly supported by an auxiliary vibration isolating member is provided on a supporting plate portion of the driving substrate. Therefore, vibration accompanying the rotation of the disk can be suppressed. as a result,
Since the rotation characteristics of the disk can be improved, the present invention has an extremely large effect when the operation of reading signals from the disk and the operation of recording signals on the disk are performed at high speed.

Further, the present invention has the advantage that the drive mechanism of the disc player can be made thinner because the vibration isolating substrate is arranged between the upper plate of the driving substrate and the supporting plate. I have.

According to the present invention, since the position of the center of gravity of the vibration isolating substrate is disposed on the rotation center axis of the spindle motor, the vibration isolating action of the vibration isolating substrate becomes uniform, and the rotational characteristics of the disk are improved. It has a great effect.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a vibration isolator according to the present invention.

FIG. 2 is a side sectional view showing a main part of the vibration isolator of the present invention.

FIG. 3 is a vibration characteristic diagram for explaining the operation of the vibration isolator of the present invention.

FIG. 4 is a vibration characteristic diagram for explaining a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Driving board 1A Through-hole 1B Top plate 1C Support plate part 2 Optical pick-up 3 Fixed board 8 Turntable 9 Rotation axis 10 Vibration-proof board

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hideo Sekine 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Fumio Kobayashi 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd.

Claims (3)

[Claims] A spindle motor for rotating a disk is fixed, a through hole for an optical pickup is formed in an upper surface plate, and a support plate portion continuously provided below the upper surface plate is provided on a fixed substrate. In a disk player having a driving substrate fixedly supported by a main vibration isolating member, a vibration isolating substrate fixedly supported by a sub vibration isolating member is provided on a supporting plate portion of the driving substrate. Disc player vibration isolator. 2. The anti-vibration device according to claim 1, wherein the anti-vibration substrate is arranged between the upper plate of the driving substrate and the support plate. 3. The anti-vibration device according to claim 1, wherein the position of the center of gravity of the anti-vibration substrate is arranged on the rotation center axis of the spindle motor.