JP3188133B2 - Disc player - Google Patents

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 shutting off external vibration to a reproducing unit.

[0002]

2. Description of the Related Art Conventionally, an insulator is used in a portable CD player in order to prevent external vibrations from being transmitted to a reproducing unit and causing sound skipping. FIGS. 5 and 6 show the mounting structure of the insulator. A disk motor 2 is fixed to a mechanism chassis 1 shown in the figure.

A disk 10 is clamped to a turntable 3 fixed to a rotation shaft of a disk motor 2 and is driven to rotate. The mechanism chassis 1 further includes a pickup unit 9 including a pickup for reading a signal of a disk.
Are supported so as to be driven in the radial direction of the disk.

[0005] 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.

[0005] To make the portable CD player compact, the lid 4 is provided close to the disk 10. In addition, as shown in FIG. 6, the insulator 8 is disposed at a position close to the turntable 3 and at a position away from the turntable 3.

[0006]

SUMMARY OF THE INVENTION Recently, portable CDs
In many players, a method of rotating a disk at double speed and storing audio data in a D-RAM is used in order to eliminate sound skipping. However, the inertia of the disk due to the gyro effect is increased.

As shown in FIG. 2, the disk rotates in the direction C around the rotation axis. However, when the main body is rotated in the direction A or B around the axis perpendicular to the disk rotation axis, the disk rotates. Generates a moment m in a direction against the rotation. In order to rotate the disk in the same manner as the main body, it is necessary to apply a reverse 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 is, as shown in FIG. Let P be the force acting on 1 and M be the distance from the disk rotation axis to the insulator 8.
Becomes

M is smaller than the disk radius L. And
In some cases, the moment required to move the disk in the same manner as the main body was not obtained by the insulator. In this case, as shown in FIG. 5, the disk 3 rotates in the direction D with respect to the main body chassis 5 and the lid 4, and the disk and the lid rub against each other.

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

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

[0012]

SUMMARY OF THE INVENTION A disk player according to the present invention is characterized in that a mechanism chassis for holding a disk driving means for clamping and rotating a disk on a turntable, a pickup for reading a signal from the disk and a driving means for the disk, is protected from external vibrations. In a disk player having a floating insulator, at least three insulators are arranged around a disk center axis, and a distance of the insulator from the disk center axis is substantially equal to or slightly smaller than a disk radius, In addition, the angle between adjacent insulators from the center axis of the disk is set to 180 ° or less.

[0013]

According to the disc player of the present invention, insulators are arranged on both sides in an arbitrary disc diameter direction, and the distance between each insulator and the disc rotation axis is substantially equal to the disc radius or slightly smaller than the disc radius. Thus, the moment applied by the insulator can be increased without increasing the spring constant of the insulator. That is, even if the disk is rotated at a high speed, the disk can be prevented from contacting the lid or the like without deteriorating the vibration resistance.

Further, a portable CD player needs to have at least a size for accommodating a disc, but according to the present invention, the above-mentioned effects can be obtained by effectively utilizing the space, so that the conventional one is required. In comparison, the portable CD player does not become large.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable CD player according to 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 according to an embodiment of the present invention. In the figure, portions having the same functions as those shown in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG.
Are arranged on a circle that is substantially equal to the radius of the disc around the center axis of the disc. The angle between the adjacent insulators and the center axis of the disk 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.

Each of the insulators 8, 8... Arranged as described above has an insulator serving as a fulcrum on the opposite side to the disc diameter direction. A moment about an axis perpendicular to the rotation axis can be generated.

That is, as shown in FIG. 3, when the force exerted on the mechanism chassis 1 by the insulator 8 is P and the distance from the disk rotation axis to the insulator 8 is M, the moment is M × P. M is the disk radius L
Is approximately 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 a disc. According to the present invention, the above-mentioned effect can be obtained by effectively utilizing the space, and therefore, compared to 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, even if the disk is rotated at a high speed, the disk can be prevented from contacting the lid or the like without deteriorating the vibration resistance.

[Brief description of the drawings]

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

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

FIG. 3 is a side view showing a portable CD player according to 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 portion 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]

 Reference Signs List 1 mechanism chassis 2 disk motor 3 turntable 4 lid 5 main body chassis 6 damper 7 coil spring 8 insulator 9 pickup unit 10 disk

Claims (1)

(57) [Claims] 1. A disk player comprising: a disk drive means for clamping and rotating a disk on a turntable; a pickup for reading a signal from the disk; and an insulator for floating a mechanism chassis for holding the drive means from external vibration. Three insulators are arranged around the disk center axis, the distance of the insulator from the disk center axis is substantially equal to the disk radius or slightly smaller than the disk radius, and the distance between the adjacent insulators from the disk center axis is A disc player having an angle of 180 ° or less.