JPH07249285A - Device for preventing vibration of disk player - Google Patents

Abstract

PURPOSE:To accurately perform the reading operation of signal recorded in a disk by pressing a leaf spring fixed to the inside surface of a cover covering a housing section of a disk to be brought into contact with a tip part of a rotary shaft of a motor fixing a turn table on which a disk is placed. CONSTITUTION:When a turn table 8 is rotated, since a disk D placed and held on this turn table 8 by a disk holding part 9 is rotated, a signal recorded in the disk D is read out by an optical pickup. When a driving current is supplied to the motor 5, rotary driving operation of the disk D is performed by the rotation of the turn table 8 through rotation of the rotary shaft 7, but rotary operation of the rotary shaft 7 is performed while being pressed at a tip part 7A by pressing force of a tip part 12A of a leaf spring. Consequently, since the rotary shaft 7 is rotated in a state in which the shaft 7 is pressed by a shaft bearing 5A incorporated in the motor 5, the rotary shaft 7 can be stably rotated even if play in the rotary shaft 7 exists.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device for a disc player which is constructed so that a signal recorded on a disc is read by an optical pickup.

[0002]

2. Description of the Related Art Disc players that read signals recorded on a disc by using an optical pickup are in widespread use. It is necessary to suppress the vibration of. As a method of suppressing the vibration of the disc, there is a method of utilizing the attractive force of a magnet as a clamping means for clamping the disc on the turntable. In such a method, a clamp member for pressing the disc on the turntable is provided on the upper surface side of the disc. It was not suitable for thinning the disc player because it had to be installed in the.

As a technique for improving such a point, Japanese Unexamined Patent Publication No.
There is one using a ball bearing as disclosed in Japanese Patent No. 151675. According to such a technique, since the disc player can be made thin, it is often adopted in portable disc players.

[0004]

DISCLOSURE OF THE INVENTION Disc players constructed to hold a disc by using a ball bearing do not include a clamp member for pressing the upper surface of the disc, so that it is easy to prevent the disc from vibrating. I can't do it.

Therefore, in such a disc player,
Although the turntable on which the disc is mounted is configured to perform the rotational driving operation with high accuracy, a minute vibration generated in the gap between the rotary shaft and the bearing of the electric motor driving the turntable is generated. There is a problem that the adverse effect on rotation is great.

The present invention is intended to provide a vibration preventing device which solves the above problems.

[0007]

DISCLOSURE OF THE INVENTION An anti-vibration device according to the present invention comprises a turntable on which a disc is mounted, a rotary table to which the turntable is fixed and a tip portion of which is projected above the turntable. It is composed of a shaft and a leaf spring which is attached to the inner surface of the lid which covers the storage portion of the disk and which presses and abuts against the tip of the rotary shaft when the lid is in the closed position.

[0008]

According to the present invention, the leaf spring is pressed against and brought into contact with the tip of the rotary shaft of the electric motor to which the turntable is fixed, so as to prevent minute vibration of the rotary shaft.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial side sectional view showing an essential part of a vibration preventing device of the present invention, and FIG. 2 is a side sectional view of a disc player according to the present invention.

Reference numeral 1 denotes a cabinet which constitutes the disc player according to the present invention, and 2 denotes a lid provided to cover a disc storage portion 3 formed in the cabinet 1. It is mounted for rotational displacement between the shown closed position and the open position rotationally displaced counterclockwise.

Reference numeral 5 denotes an electric motor mounted and fixed to the fixed base plate 6 with screws (not shown), and the rotary shaft 7 is projected upward from the fixed base plate 6. A turntable 8 is press-fitted and fixed to the rotary shaft 7, and is configured to mount the disk D thereon.

Reference numeral 9 denotes a disk holding portion which is provided in the central portion of the turntable 8 and which is fitted into a central hole formed in the central portion of the disk D. As shown in FIG. The ball pairing 11 pressed outward by is provided inside. 1
Reference numeral 2 is a leaf spring attached to the inner surface of the lid body 2, and its tip portion 12A is configured to press and abut the tip portion 7A of the rotary shaft 7 when the lid body 2 is in the closed position. ing.

With such a structure, when the disc D is placed on the turntable 8, the disc D is inserted from above while the lid 2 is rotationally displaced to the open position, and the center hole of the disc D is inserted into the disc. It is carried out by fitting it into the holding portion 9.

When the center hole of the disc D is fitted into the disc holding portion 9 and the disc D is pressed downward, that is, in the direction of arrow A, the ball bearing 11 causes the coil spring 1 to move.
It is displaced inwardly against the biasing force of 0. And
When the disk D moves below the center of the ball bearing 11, the ball bearing 11 moves outward, and the state shown in FIG. 1 is obtained. In such a state, the outward urging force of the ball bearing 11 from the coil spring 10 acts as a force for pressing the disk D against the turntable 8, so that the disk D is pressed and held on the turntable 8. Will be.

In this way, the mounting operation of the disc D on the turntable 8 is performed, but in such a state,
When the lid body 2 is rotated to the closed position, the state shown in FIG. 2 is obtained. When the lid 2 is rotated to the closed position, the tip portion 12A of the leaf spring 12 abuts on the tip portion 7A of the rotating shaft 7 and the tip portion 7A is pressed by its elastic force as shown in the figure. .

When a drive current is supplied to the electric motor 5 in such a state, the rotary shaft 7 is driven to rotate,
The turntable 8 fixed to the rotary shaft 7 is also driven to rotate. When the turntable 8 rotates, the disc D held and held by the disc holding portion 9 on the turntable 8 is rotationally driven, so that a signal recorded on the disc D can be read by an optical pickup. Done.

When a drive current is supplied to the electric motor 5, the turntable 8 is rotated by the rotation of the rotary shaft 7 to rotate the disk D. The rotary motion of the rotary shaft 7 is the tip of the leaf spring 12. It is performed while the tip portion 7A receives the pressing force of the portion 12A. As a result, the rotating shaft 7 rotates in a state of being pressed by the bearing 5A incorporated in the electric motor 5, so that the rotating shaft 7 can rotate in a stable state even if the rotating shaft 7 is loose.

Therefore, according to such a driving device, the rotating shaft 7
Since it is possible to suppress the slight vibration of the disk D, it is possible to prevent the disk D from vibrating, and it is possible to accurately read the signal recorded on the disk D.

Further, a leaf spring 12 is attached to the tip portion 7A of the rotary shaft 7.
12A of the leaf spring 12 comes into contact, the corner portion 7B of the tip portion 7A is formed in a curved shape as shown in FIG. 1, and the tip portion 12A of the leaf spring 12 is brought into contact with the corner portion 7B. The influence of the leaf spring 12 on the rotation characteristics of the rotary shaft 7 can be reduced. The pressing force acting on the corner portion 7B acts on the rotating shaft 7 in the axial direction and in the direction perpendicular to the axial direction.
There is an effect that it is possible to suppress rattling in the axial direction.

[0020]

According to the present invention, the leaf spring mounted on the inner surface of the lid that covers the storage portion of the disk is pressed against the tip of the rotary shaft of the electric motor to which the turntable on which the disk is mounted is fixed. Since they are brought into contact with each other, even if there is rattling between the rotary shaft and the bearing, it is possible to suppress the generation of minute vibrations of the rotary shaft, and according to the present invention, the reading of the signal recorded on the disk can be performed. The operation can be performed accurately.

Further, according to the present invention, since the corner portion of the rotary shaft with which the leaf spring abuts is curved, the influence on the rotational characteristics of the rotary shaft can be reduced.

[Brief description of drawings]

FIG. 1 is a partial side sectional view showing a main part of a vibration prevention device of the present invention.

FIG. 2 is a side sectional view of a disc player according to the present invention.

[Explanation of symbols]

 1 Cabinet 2 Lid 3 Storage Section 5 Electric Motor 7 Rotating Shaft 7A Tip 7B Corner 8 Turntable 9 Disk Holding 12 Leaf Spring D Disk

Claims (2)

[Claims] 1. A disc player provided with a lid for covering a disc storage portion, wherein a turntable on which the disc is placed, the turntable is fixed, and a tip portion of the turntable is projected above the turntable. An anti-vibration device for a disc player, comprising: a rotating shaft, and a leaf spring, which is attached to the inner surface of the lid and presses and abuts against the tip of the rotating shaft when the lid is in the closed position. 2. A vibration preventing device for a disc player, wherein a corner portion of a tip portion is formed into a curved surface and a leaf spring is pressed against and abutted against the corner portion.