KR970003492Y1 - Cramping apparatus for a disk player - Google Patents

Abstract

None.

Description

Clamping Device for Optical Disc Device

1 is a schematic cross-sectional view showing a clamping device of a conventional optical disk device.

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

Figure 3a, b is a schematic cross-sectional view showing an operation example of the clamping device of the optical disk device according to the present invention.

* Explanation of symbols for main parts of the drawings

10: drive motor 11: rotation axis

20 turntable 21 body

22: boss 23: rubber cover

30: clamp 40: piston

41, 41 ': first and second insertion holes 50: auxiliary motor

51: rack 52: pinion

60: guide shaft 70: stopper

80: cover

The present invention relates to a clamping device for an optical disk device, and more particularly, to a clamping device for an optical disk device having an improved structure of a clamp for supporting a disk seated on a turntable.

In general, an optical disc player generates noise and breaks and jitter during recording of sound when the disc recorded as a digital signal is shaken due to an external impact or is driven eccentrically on the turntable. Since a jitter phenomenon occurs, a clamping device is used to stabilize the disk mounted on the turntable.

1 shows a clamping apparatus of a conventional optical disk device.

The clamp 3 supporting the disk D seated on the turntable 2 is fixed to the turntable 2, which is supported by the rotation shaft 1a of the drive motor 1, and on which the disk D rests. The clamp holder 4 which supports this clamp 3 is provided. On the other hand, the turntable 2 has a seating surface 2a on which the disk D transported by the disk tray 5 is seated and an inclined surface 2b protruding at an angle from the seating surface 2a, The inclined groove 3a is provided in the lower surface of the clamp 3 so that the inclined surface 2b of the upper turntable 2 is inserted, and the upper portion of the inclined groove 3a is shielded by the metal plate 3b. And the lower surface is provided with the support surface 3c which supports the disk D mounted on the seating surface 2a of the said turntable 2. In addition, a guide groove 4a is provided in the center surface of the clamp holder 4 supporting the clamp 3 so that the clamp 3 can be moved up and down, and the clamp 3 is located below the guide groove 4a. The locking jaw 4b is provided so that the protrusion 3d of the () is caught and supported.

In the clamping apparatus of the conventional optical disk device configured as described above, the clamp 3 supported by the clamp holder 4 is supported by the disk D while the disk D is seated on the seating surface 2a of the turntable 2. It is supported at a predetermined pressure through the surface 3c.

However, in the clamping apparatus of the conventional optical disk apparatus as described above, the clamp supported by the clamp holder always supports the disk at a predetermined pressure in order to support the disk seated on the turntable. Therefore, the load of the clamp holder is applied to the motor located below the turntable. Therefore, there is a problem in that the motor is subjected to a load due to a large load, and high temperature heat is generated, thereby shortening the motor life and causing a slip phenomenon due to a load applied to a fixed part of the rotating shaft when the disk is rotated.

The present invention is devised to solve the problems of the conventional clamping device of the optical disk device, it is possible to prevent the excessive load on the main motor located in the lower part of the turntable and to extend the life of the motor and to the motor shaft It is an object of the present invention to provide a clamping device for an optical disk device that can prevent the slip phenomenon occurring.

In order to achieve the above object, the present invention is supported by a rotating shaft of the drive motor, a turntable having a body portion provided with a guide groove on its inner surface, a boss formed on the inner surface of the center of the body portion, and a disk seated on the upper surface of the turntable. A clamp for supporting the piston, a piston positioned between the driving motor and the turntable and reciprocating along the guide groove of the turntable, and a vacuum box for generating a predetermined vacuum pressure on the inner surface of the body of the turntable by the reciprocating movement of the piston. The feature is that the means are provided.

The present invention as described above, by supporting the disk seated on the upper surface of the turntable by the vacuum pressure generated on the inner surface of the turntable does not take a large load on the motor can prevent shortening the life of the motor due to the overload and the rotating shaft Even if the load is not large, the degree of rotation can be improved.

Hereinafter, a preferred embodiment of a clamping apparatus for a disk device according to the present disclosure will be described in detail with reference to the accompanying drawings.

2 is an exploded perspective view of the clamping device of the optical disk device according to the present invention, Figure 3 (a) (b) is a cross-sectional view showing an operation example of the clamping device of the optical disk device according to the present invention.

As shown therein, the clamping device of the optical disk device according to the present invention has a substantially cylindrical body 21 having a guide groove 21a formed on its inner surface of the turntable 20 supported by the rotating shaft 11 of the drive motor 10. ) In addition, a boss 22 having a through hole 22a is provided on the central inner surface of the body 21 to insert the rotation shaft 11 of the drive motor 10. At this time, it is preferable that the upper surface of the body 21 and the upper surface of the boss 22 are formed at the same height to facilitate the mounting of the disk (D). And the upper surface of the boss 22 and the body 21 when the disk (D) is seated by the vacuum pressure generating means to be described later to prevent deformation due to the contact of the body 21 and the boss 22 It is preferable to interpose the rubber cover 23 on the upper surface of the.

A clamp 30 supporting a disk seated on an upper surface of the turntable 20 is positioned above the turntable 20.

Between the turntable 20 and the drive motor 10 is located a piston 40 reciprocating along the guide groove 21a of the turntable 20. Then, a vacuum pressure generating means is provided on the inner surface of the body 21 of the turntable 2 to generate a predetermined vacuum pressure by reciprocating transfer of the piston 40.

Vacuum pressure generating means for generating a vacuum pressure on the inner surface of the body 21 by moving the piston 40 up and down along the guide groove 21a provided on the inner surface of the body 21 of the turntable 20, One side is coupled to the first and second insertion holes 41 and 41 'formed at side portions of the piston 40 which face each other, and the first insertion hole 41 and the other side thereof is the auxiliary motor 50. It is provided in the guide shaft 60 and the second insertion hole 41 'connected to the rack 51 and the pinion 52 driven by the upper and lower movements, and the reciprocating movement of the piston 40 Limiting stopper 70 and the air discharge hole (21b) formed on the opposite surface of the upper body 21 of the turntable 20 and formed in communication with the guide groove (21a) of the body (21), The air discharge hole 21b is closed to the piston 40 in the lower portion and the body 21 adjacent to the air discharge hole 21b so as to open when rising. And a cover 80 that is not bonded.

On the other hand, the stopper 70 for limiting the reciprocating movement of the piston 40, one side is inserted into the second insertion hole (41 ') and the bar magnet 71 is coupled to the other side and the rod-shaped switching on the center The switch 72 is provided with a switching shaft 73 coupled to the rod eccentrically, and an electromagnet 74 having an electrode facing the rod magnet of the switching shaft 73 and facing the rod magnet 71. do.

In the clamping apparatus of the optical disk apparatus according to the present invention configured as described above, as shown in FIG. 3 (a), the disk D is formed on the upper surface of the body 21 and the boss 22 of the turntable 20. In the state seated in the stopper 70 coupled to the second insertion hole 41 ′ formed in the lower portion of the piston 40, the switching shaft 73 because the electromagnet 74 is off (off) state. The rod-shaped switching bar 72 is installed eccentrically on the center of the short side thereof by its own weight.

In this state, the auxiliary motor 50 is driven to drive the pinion 52 and the rack 51. As a result, the other end thereof is coupled to the rack 51, and the guide shaft 6 having one end coupled to the piston 40 is raised, and at the same time, the piston 40 is raised. At this time, the cover 80 provided above the body 21 of the turntable 20 and closing the air discharge hole 21b is opened and at the same time, the guide groove 21a of the body 21 through the air discharge hole 21b. ) Exhaust the air flowing into the inner surface.

In such a state, in supporting the disk D seated on the upper surface of the mill boss 22 of the body 21, the clamp 30 located on the upper portion of the turntable 20 is first lowered so that the disk D Support the top of the).

At the same time, the auxiliary motor 50 is driven to lower the piston 40 by lowering the guide shaft 60 having the other end fixed to the rack 51. At this time, as the piston 40 descends, the body 21 Cover 80 coupled to the top of the () is closed and the piston 40 is continuously lowered to lower the air pressure in the guide groove (21a) of the body 21 is maintained in a vacuum state. Therefore, the disk D mounted on the upper surface of the body 21 and the boss 22 is supported by the suction force. At this time, the cover 80 of the rubber material is interposed on the upper surface of the disk (D) and the body 21 and the boss 22 can be smoothly prevent the inflow of air.

On the other hand, the piston 40 may be raised by the vacuum pressure inside the body 21, but the piston 40 is lowered and at the same time the stopper 70 operates to prevent the piston 40 from rising. do. That is, when the electromagnet 74 facing the rod magnet 71 provided at one end of the switching shaft 73 is turned on to form a magnetic pole opposite to the magnetic pole of the rod magnet 71, the switching shaft 73 ) Is rotated 180 ° by the magnetic field of the electromagnet 74, the true side of the switching rod 72 provided in the center of the switching shaft 73 is positioned upward and in contact with the lower portion of the body 21 to raise the piston 40 To prevent. Therefore, the disk D is in a state capable of smoothly rotating.

According to the clamping apparatus of the optical disk device according to the present invention as described above, the support of the disk seated on the turntable is supported by the vacuum pressure generated on the inner surface of the turntable, so that the conventional clamp continues to press the disk at a constant pressure. Therefore, it is possible to prolong the life of the motor by smoothly preventing the overload of the generated motor, and has the advantage of obtaining a high-precision rotational strength by excellent supporting force for supporting the disk. Therefore, high-quality images can be obtained, which is a useful design to improve the reliability of the product.

Claims (5)

Supported by the rotary shaft 11 of the drive motor 10, the body portion 21 is provided with a guide groove (21a) on the inner surface, and is installed on the central inner surface of the body portion 21 of the drive motor 10 A turntable 20 having a boss 22 in which a through hole 22a is formed so that the rotation shaft 11 protrudes; The clamp 30 supporting the disk D seated on the upper surface of the turntable 20, and the guide groove 22a of the turntable 20 positioned between the drive motor 10 and the turntable 20. A piston 40 reciprocated along; And a vacuum pressure generating means for generating a predetermined vacuum pressure on the inner surface of the body (21) of the turntable (20) by reciprocating movement of the piston (40). The vacuum generating means according to claim 1, wherein the vacuum pressure generating means includes first and second insertion holes (41) (41 ') formed at side surfaces of the piston (40) facing each other, and the first insertion hole (41). One side is coupled to the other side and the other side is connected to the rack 51 and pinion 52 driven by the auxiliary motor 50, the guide shaft 60 to move up and down, and the second insertion hole 41 And a stopper 70 for limiting the reciprocating movement of the piston 40, and a guide groove 21a of the body 21 formed on an opposite surface of the upper portion of the body 21 of the turntable 20. The air discharge hole 21b formed in communication with the air discharge hole 21b, and the body 21 adjacent to the air discharge hole 21b so that the air discharge hole 21b is closed when the piston 40 is lowered and opened when the piston 40 is raised. Clamping apparatus of an optical disk device, characterized in that it comprises a cover (80) hinged to the). The clamping apparatus of claim 1, wherein the upper surface of the body (21) and the upper surface of the boss (22) have the same height. The optical disk according to claim 1, wherein the upper surface of the body (21) and the upper surface of the upper boss (22) are interposed between a cover (23) made of rubber material so as to relieve the lamination during mounting of the disk (D). Device clamping device. According to claim 1, The stopper 70, one side is inserted into the second insertion hole (41 ') and the bar magnet 71 is coupled to the other side, and the rod-shaped switching rod 72 on the center And an electromagnet 74 having an eccentrically coupled switching shaft 73 and a position facing the rod magnet 71 of the switching shaft 73 and having electrodes opposed to the rod magnet 71. Clamping apparatus for an optical disk device, characterized in that.