JPH06215396A - Disk player - Google Patents

Abstract

PURPOSE:To impart magnetism shielding function to a cover and to eliminate the malfunction of a pickup by composing the cover of resin containing magnetic powder. CONSTITUTION:In a disk player provided with a turn table 1 mounting a disk 1, a pickup 4 moving reciprocally in the direction of the relevant turn table 1 and a cover 11 covering the relevant pickup 4, the cover 11 is composed of resin containing magnetic powder added with magnetic particles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player, for example, compact disc (CD), CD-ROM.
The present invention relates to a disc player having a magnetic shield structure of a pickup for reading information read on a disc.

[0002]

2. Description of the Related Art Generally, compact discs and CD-ROs
In a player such as M, an optical pickup is arranged below a turntable on which a disc is placed, and a chucking mechanism for chucking the disc on a turntable is arranged above the turntable. The drive unit is covered with a resin cover to prevent dust and unnecessary contact.

[0003]

However, in such a conventional disc player, since the cover does not have a magnetic shield function, the optical pickup may malfunction due to the influence of the magnet of the chucking mechanism. There was a problem.

The present invention has been made in view of such conventional problems, and the cover is made of a resin containing magnetic powder so that the cover has a magnetic-shielding function, thereby preventing malfunction of the pickup. DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a disc player.

[0005]

According to the present invention, there is provided a turntable on which a disc is placed, a pickup which reciprocates in a direction in which the turntable is located, and a cover which covers the pickup. It is characterized by being formed of a resin containing magnetic powder to which magnetic powder is added.

[0006]

According to the present invention, when the disc is chucked on the turntable, magnetic lines of force come out from the magnet, but since the cover is made of resin containing magnetic powder to which magnetic powder is added, it has a magnetic shield function. Block the magnetic field lines from
The magnetic force does not affect the pickup.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing an embodiment of a disc player according to the present invention. First, the configuration will be described. In FIGS. 1 and 2, reference numeral 1 is a turntable provided on the chassis 2 and is attached to the shaft of a motor 3 attached to the lower portion of the chassis 2. 4 is a pickup,
The drive mechanism reciprocates below the disk 15 in the direction of arrow S. The drive mechanism includes a rack 6 integrated with the pickup table 5, a rod 7 that guides the rack 6, gear trains 8A and 8B that drive the rack 6, a motor 10 that drives the gear 8B, and the like.

A cover 11 is mounted on the chassis 2. This cover 11 has mounting legs 12 at the four corners.
The leg portion 12 is engaged with and fixed to the hole 13 of the chassis 2. The cover 11 covers at least the upper part of the moving range of the pickup 4. The cover 11 is made of a resin containing magnetic powder to which magnetic powder such as iron powder, nickel powder, and cobalt powder is added, and has a magnetic shield function.

In FIG. 2, 14 is a chucking mechanism having a chucking magnet 16, and the chucking mechanism 14 is an annular engaging plate that engages with a hook portion 101a below the upper lid 101 of the disk player 100. 20 and a center member 21 that engages with the inner periphery of the engaging plate 20 and engages with the center of the turntable 1 to position the chucking mechanism 14. Reference numeral 22 is a disc-shaped felt member, and the felt member 22 is fixed to the lower side of the center member 21 and presses the disk 15. An annular permanent magnet 16 is housed and held between the engagement plate 20 and the center member 21. When the chuck mechanism 14 is chucked on the disk 15 on the turntable 1, the permanent magnet 16 attracts the magnetic turntable 1 by the magnetic lines of force from the permanent magnet 16 to move the disk 15 to the target. -It is designed to be fixed on the table 1.

Next, the operation will be described. Disc player 1
When the upper lid 101 of 00 rotates on the turntable and the disk 15 is chucked on the turntable 1, magnetic lines of force emerge from the magnet 16, but the cover 11 is permanent because magnetic powder is added. It blocks the magnet wire from the magnet 16 to perform a magnetic shield function, and does not affect the pickup 4.
Therefore, even when the pickup 4 particularly approaches the inner circumference of the disk 15, it is not affected by the magnetic force, and it is possible to prevent an error from occurring.

[0011]

As described above, according to the present invention,
Since the cover is made of resin containing magnetic powder to which magnetic powder is added, this cover functions as a magnetic shield, blocking the influence of magnetic lines of force of the chucking mechanism, preventing errors in the pickup, and greatly improving playback / recording performance. Can be improved.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view showing an embodiment of a disc player according to the present invention.

2 is a vertical cross-sectional view of the embodiment shown in FIG.

[Explanation of symbols]

 1 turntable 4 pickup 11 cover 15 disc 100 disc player

Claims (1)

[Claims] 1. A disk player provided with a turntable on which a disk is placed, a pickup that reciprocates in a direction in which the turntable is located, and a cover that covers the pickup, wherein the cover is magnetic powder to which magnetic powder is added. Disc player characterized by being formed of resin containing resin