JPH08287666A - Disk player - Google Patents

Abstract

PURPOSE: To prevent contact between a disk and a rid, etc., without worsening the vibration resistance. CONSTITUTION: A mechanism chassis 1 holds the driving means of a disk 10 and the driving means of a pickup unit 9. Insulators 8, 8... cause the mechanism chassis 1 to float from external vibrations. At least three insulators 8, 8... are arranged around the center axis of a disk, the distance of each insulator from the disk center axis is set roughly equal to a disk radius or larger than this and angles of adjacent insulators from disk center axis are set lower than 180 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player and, more particularly, to a means for isolating external vibration to a reproducing section.

[0002]

2. Description of the Related Art Conventionally, an insulator is used in a portable CD player in order to prevent vibration from being transmitted from the outside to a reproducing section to cause skipping. The insulator mounting structure is shown in FIGS. A disc motor 2 is fixed to the mechanism chassis 1 shown in the figure.

A disk 10 is clamped on a turntable 3 fixed to a rotary shaft of a disk motor 2 and is rotationally driven. The mechanism chassis 1 further includes a pickup unit 9 including a pickup for reading the signal of the disc.
Are supported so that they can be driven in the disk radial direction.

As shown in detail in FIG. 5, the mechanism chassis 1 is connected to the main body chassis 5 via a damper 6, and a coil spring 7 is mounted between the mechanism chassis 1 and the main body chassis 5. The damper 6 and the coil spring 7 constitute an insulator 8 that supports the mechanism chassis 1 in a floating state.

In order to make the portable CD player compact, the lid 4 is provided close to the disc 10. Further, the insulator 8 is arranged at a position close to the turntable 3 and at a position apart from the turntable 3, as shown in FIG.

[0006]

Recently, a portable CD is used.
A player often uses a method of rotating a disk at a double speed to store sound data in a D-RAM in order to eliminate skipping of sound, but this causes a large inertia of the disk due to a gyro effect.

As shown in FIG. 2, the disk is rotating in the direction C around the rotation axis, but when the main body is rotated in the direction A or B around the axis perpendicular to the rotation axis of the disk, the disk is rotated. Generates a moment m in the direction against its rotation. In order to rotate the disk in the same manner as the main body, it is necessary to apply an opposite moment m to the mechanism chassis 1 by the insulator 8.

The moment is applied by the insulators 8, 8, ... Shown in FIG. 6, but the moment generated by the force applied by the insulator 8 close to the turntable 3 causes the insulator 8 to act as a mechanism chassis as shown in FIG. If the force exerted on 1 is P and the distance from the disk rotation axis to the insulator 8 is M, then M × P
Becomes

M is smaller than the disk radius L. And
The insulator sometimes did not provide the moment necessary to move the disc in the same way as the main body. In that case, as shown in FIG. 5, the disk 3 rotates in the D direction with respect to the main body chassis 5 and the lid 4, which causes a problem that the disk and the lid rub.

If the spring constant of the insulator is increased so that the force P exerted by the insulator on the mechanism chassis 1 is increased, the moment applied by the insulator can be increased, but in this case, vibration resistance deteriorates.

The present invention has been made in view of the above points, and an object of the present invention is to provide a lid or the like with which a disk is close even if the disk is rotated at a high speed without deteriorating vibration resistance. It is to provide a disc player that does not come into contact.

[0012]

DISCLOSURE OF THE INVENTION A disc player according to the present invention prevents a disc drive means for clamping and rotating a disc on a turntable, a pickup for reading a disc signal and a mechanism chassis for holding the drive means from external vibration. In a disc player provided with a floating insulator, at least three insulators are arranged around a disc central axis, and the distance between the insulator and the disc central axis is substantially equal to or larger than the disc radius and adjacent to each other. The angle from the disk center axis of the insulator is 18
It is set to 0 ° or less.

[0013]

According to the disc player of the present invention, the insulators are arranged on both sides with respect to the disc diameter direction, and the distance between each insulator and the disc rotation axis is substantially equal to or larger than the disc radius.
The moment applied by the insulator can be increased without increasing the spring constant of the insulator. That is, it is possible to prevent the disc from coming into contact with the lid or the like even if the disc is rotated at a high speed without deteriorating the vibration resistance.

Further, in the portable CD player, at least a size for accommodating the disk is required. According to the present invention, however, the space can be effectively used to obtain the above-mentioned effect, so that the conventional CD player can be used. In comparison, the portable CD player does not become large.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable CD player which is an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a schematic configuration of a portable CD player which is an embodiment of the present invention. In the figure, portions having the same functions as those shown in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, the insulators 8, 8 ...
Are arranged on a circle having a disk radius about the center axis of the three disks. Further, the angle between the insulator and the disk center axis of the adjacent insulators is 180 ° or less.
The damper 6 and the coil spring 7 constitute an insulator 8 that supports the mechanism chassis 1 in a floating state.

The insulators 8, 8 ... Arranged in this way have insulators serving as fulcrums on the opposite side with respect to the disk diametrical direction. It is possible to generate a moment about an axis orthogonal to the rotation axis.

That is, as shown in FIG. 3, when the force exerted by the insulator 8 on the mechanism chassis 1 is P and the distance from the disk rotation shaft to the insulator 8 is M, the moment becomes M × P. M is the disk radius L
Is almost equal to.

As described above, since the distance from the disk rotating shaft to the insulator 8 is longer than that of the conventional one, the moment applied by the insulator can be increased without increasing the spring constant of the insulator.

Further, the portable CD player needs to have at least a size for accommodating the disk. According to the present invention, however, the above effect can be obtained by effectively utilizing the space, so that it can be compared with the conventional one. Portable c
The D player does not become large.

[0021]

According to the disk player of the present invention, the moment applied by the insulator can be increased without increasing the spring constant of the insulator.
That is, it is possible to prevent the disc from coming into contact with the lid or the like even if the disc is rotated at a high speed without deteriorating the vibration resistance.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a portable CD player which is an embodiment of the present invention.

FIG. 2 is a perspective view showing the external appearance of a portable CD player.

FIG. 3 is a side view showing a portion of a portable CD player which is an embodiment of the present invention.

FIG. 4 is a side view showing a portion of a conventional portable CD player.

FIG. 5 is a side view showing a part of a conventional portable CD player.

FIG. 6 is a plan view showing a schematic configuration of a conventional portable CD player.

[Explanation of symbols]

 1 Mechanism Chassis 2 Disc Motor 3 Turntable 4 Lid 5 Body Chassis 6 Damper 7 Coil Spring 8 Insulator 9 Pickup Unit 10 Disc

Claims (1)

[Claims] 1. A disc player provided with an insulator for floating a disc drive means for clamping a disc on a turntable and rotating it, a pickup for reading a signal of the disc and a mechanism chassis for holding the drive means from an external vibration, and at least. Three insulators are arranged around the disk center axis, and the distance from the disk center axis of the insulator is set to be substantially equal to or larger than the disk radius,
Further, a disc player in which the angles of the adjacent insulators from the disc central axis are 180 ° or less.