KR19990013067U - Disc clamping device for optical disc players - Google Patents

Abstract

The present invention discloses a disc clamping device of an optical disc player. The present invention provides a disk clamping device including a turntable having a seating flange on which an optical disk is seated, and a substantially conical guide boss for guiding the center hole of the optical disk, and a clamper for pressing the optical disk seated on the seating flange of the turntable. In the lower surface of the clamper, the left and right guide protrusions are formed to face each other, and the plurality of spiral guide grooves are formed on the outer peripheral surface of the guide boss of the turn table so that the left and right guide protrusions are guided downward by rotation of the turn table. Characterized in that. Therefore, the optical disk can be seated on the turntable with a strong clamping force through the interlocking relationship between the left and right guide protrusions on the clamper and the spiral guide grooves formed on the guide boss into which they are inserted. Since slip friction with the wafer can be prevented, stable recording / reproducing is possible. In addition, even in a high speed optical disc player such as a CD-ROM, slip friction can be easily prevented.

Description

Disc clamping device for optical disc players

The present invention relates to an optical disk player, and more particularly, to a disk clamping device for stably clamping an optical disk guided by a tray on a turn table.

An optical disc player such as a compact optical disc player or a compact disc changer, etc., mounts the optical disc on the upper surface of the turntable by driving a loading mechanism, and clamps the optical disc. In the state clamped by the operation of the clamping unit, the information of the optical disk is reproduced or recorded by driving the pick-up unit.

As shown in FIG. 1, the disk clamping apparatus of the optical disc player has a rotating shaft 11 protrudingly formed on the spindle motor 10, and the optical conveyed by the optical disk tray (not shown). The turn table 20 on which the disk D is seated is axially supported. Then, above the turn table 20, a clamper 30 for pressing and supporting the optical disk D mounted on the turn table 20 is positioned.

Looking at the detailed structure of the turn table 20, a mounting flange 21 on which the optical disk D is seated, and a central hole protruding from the center of the turn table 20 and formed in the center surface of the optical disk D, 1) is partitioned into approximately conical guide bosses 22 that are slidingly inserted.

On the other hand, the above-described clamper 30 is supported to the clamp plate 40, in particular by the downward movement of the clamp plate 40 to support the optical disk (D) by pressure.

However, in the disc clamping apparatus of the conventional optical disc player as described above, the pressing force is very weak because the pressing and holding of the optical disc D on the turntable 20 depends only on the pressing force of the clamper 40. will be.

Therefore, when the turn table 20 is rotationally driven by the spindle motor 10, there is a problem that slip friction occurs between the optical disk D and the seating flange 21 of the turn table 20, thereby preventing stable regeneration. Is caused. On the other hand, such a problem is more serious in high speed optical disc players such as CD-ROMs which are widely used in recent years.

On the other hand, in order to solve such a problem, the clamping force is conventionally provided by providing a magnet on the clamper side and an iron piece on the turntable side to improve the clamping force or by interposing a separate pressure spring between the clamper and the clamp plate. Various things, such as improvement, are proposed.

However, improving the clamping force by such a method has a problem in that it is necessary to include a large number of parts, resulting in a decrease in assembly workability and in particular a cost increase.

The present invention has been devised to solve the above-mentioned conventional problems, and the object of the present invention is not only to improve the clamping force, but also to reduce the cost and workability of the disc of the optical disc player. It is to provide a clamping device.

1 is an exploded perspective view showing a disc clamping device of a conventional optical disc player;

Figure 2 is an exploded perspective view showing a disk clamping device according to the present invention,

3 is a combined view of FIG.

♣ Explanation of symbols for the main parts of the drawing ♣

10: spindle motor 20: turntable

21: mounting flange 22: guide boss

22a, 22b: spiral guide groove 30: clamper

31, 32: guide projection

A feature of the present invention for achieving the above object is a spindle motor, a bearing flange which is axially supported and rotated by a rotation axis of the spindle motor, and a conical guide boss for guiding the center hole of the optical disk and a seating flange on which the optical disk is mounted. A disk clamping apparatus of an optical disk player comprising a turn table having a turntable and a clamper for pressing an optical disk seated on a seating flange of the turn table, wherein the left and right guide protrusions are formed on the lower surface of the clamper to face each other. In the disk clamping apparatus of the optical disk player, a plurality of spiral guide grooves are formed on the outer peripheral surface of the guide boss of the turn table so that the left and right guide protrusions are guided downward by the rotation of the turn table.

Hereinafter, a preferred embodiment of a disc clamping apparatus for an optical disc player according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 are a perspective view and a cross-sectional view showing a disk clamping device of the optical disk player according to the present invention. The following description will be made with reference to FIG. 1.

First, referring to FIG. 1, a rotation shaft 11 protrudes from the spindle motor 10, and a turn on which the optical disk D transported by an optical disk tray (not shown) is seated on the rotation shaft 11. The table 20 is axially supported. In addition, a clamper 30 for pressing and supporting the optical disk D seated on the turn table 20 is positioned above the turn table 20.

In the detailed structure of the turn table 20, the mounting flange 21 on which the optical disk D is seated, and a central hole protruding from the center of the turn table 20 and formed in the center surface of the optical disk D are provided. (1) is partitioned into a substantially conical guide boss 22 that is slidingly inserted.

On the other hand, the above-described clamper 30 is supported to the clamp plate 40, in particular by the downward movement of the clamp plate 40 to support the optical disk (D) by pressure. However, through such downward movement of the clamp plate 40 it is not possible to obtain a sufficient pressure bearing force.

To this end, the present invention, the left and right guide protrusions 31 and 32 are formed to extend on the lower surface of the clamper 30, the left and right guide protrusions 31 and 32 described above so that the guide can be inserted downward. On the outer circumferential surface of the guide boss 22 of the turn table 20, spiral guide grooves 22a and 22b extend from left and right.

According to the present invention having such a configuration, the optical disk D is seated on the turn table 20 by an optical disk tray (not shown), and at the same time, the clamper 30 is moved by the downward movement of the clamp plate 40. The turn table 20 is coupled to the guide boss 22 with the optical disk D interposed therebetween.

At this time, the left and right guide protrusions 31 and 32 formed on the lower surface of the clamper 30 are positioned below the spiral guide grooves 22a and 22b formed on the outer circumferential surface of the guide boss 22.

In this state, when the turntable 20 is driven to rotate through the spindle motor 10 for recording and reproducing, the clamper 30 rotates about the guide boss 22.

As the clamper 30 rotates, the left and right guide protrusions 31 and 32 inserted into the helical guide grooves 22a and 22b of the guide boss 22 are subjected to downward force, and as a result, The clamper 30 is to be in close contact with the upper surface of the optical disk (D) with a stronger pressing force. Therefore, slip friction between the optical disc D and the clamper 30 does not occur, and high density recording and reproduction can be performed through a pickup unit (not shown).

On the other hand, the above-described embodiment is merely to describe one preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and can be changed appropriately within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, according to the disk clamping apparatus of the optical disk player according to the present invention, the optical disk has a strong clamping force through an interlocking relationship between the left and right guide protrusions on the clamper and the spiral guide grooves formed on the guide bosses into which they are inserted. Since it can be mounted on the turntable to prevent slip friction with the optical disk during the turntable rotation, stable recording / reproducing is possible. In addition, even in a high speed optical disc player such as a CD-ROM, slip friction can be easily prevented.

Claims (1)

On a turn table having a spindle motor, a seating shaft axially supported by a rotating shaft of the spindle motor, the seating flange on which the optical disk is seated, and a substantially conical guide boss for guiding the central hole of the optical disk, and a seating flange of the turntable. In the disk clamping apparatus of the optical disk player comprising a clamper for pressing the seated optical disk, Left and right guide protrusions 31 and 32 are formed to face each other on the lower surface of the clamper 30, A plurality of spiral guide grooves 22a and 22b are formed on the outer circumferential surface of the guide boss 22 of the turn table 20 such that the left and right guide protrusions 31 and 32 are guided downward by the rotation of the turn table 20. A disk clamping device for an optical disk player, characterized in that it is formed.