KR20130024270A - Clamping apparatus for optical disc - Google Patents

Abstract

PURPOSE: An optical disc clamping device is provided to perform clamping operation and rotation operation by putting a clamper and a turn table close to each other using an elastic force transferred by an elastic member. CONSTITUTION: A turn table mounts an optical disc. A clamper(15) is closely attached to the turn table and clamps an optical disc. The clamper is closely attached to the turn table by an elastic force transferred by an elastic member. A coil spring(33,34) is installed to surround a body part of a damper. A washer(40) having a circular form contact protrusion is installed in the central of a clamper cover contacting with the clamper.

Description

Optical disc clamping device {Clamping apparatus for optical disc}

The present invention is, for example, an optical disk clamping device applied to various types of optical disc drives (ODD) for recording or playing data on an optical disc such as a CD (CD), a DVD (DVD), a BD (BD), etc. It is about.

In general, an optical disk drive (ODD) widely used, for example, as shown in Figure 1, the spindle motor 10, optical pickup 11, tray 12, chassis 13, clamper cover 14 ), The clamper 15, the clamper yoke 16 and the like.

In addition, the clamper cover 14 may be manufactured by, for example, a separate independent apparatus, and then bonded with the chassis 13 by an adhesive or the like, or may be integrated with the chassis 13. The instrument can be made of water.

On the other hand, the optical disk 20 seated on the turntable of the spindle motor 10 is in close contact with the clamper 15 is firmly clamped (clamping), and then rotates at a high speed, the spindle motor 10 is For example, as shown in FIG. 2, the turntable 100, the clamper magnet 101, the rotor magnet 102, the stator coil 103, the stator plate 104, the rotor shaft 105, Bearing housing 106, and suction magnet 107.

When the optical disc 20 seated on the turntable 100 of the spindle motor 10 is upwardly clamped by the clamper 15, as shown in FIGS. 1 and 2, the clamper ( A magnetic force attracting each other acts between the clamper yoke 16 provided at 15) and the clamper magnet 101 provided at the turntable 100 of the spindle motor 10.

In addition, a magnetic force attracting each other acts between the suction mark net 107 provided on the rotor of the spindle motor and the bearing housing 106 made of ferrous metal provided on the stator of the spindle motor. .

Accordingly, although the flow of air generated by the high speed rotation of the optical disk acts as a flotation force for pushing up the optical disk 20 seated on the turntable 100 in the direction of the clamper 15, the clamper yoke as described above By using the magnetic force acting between the 16 and the clamper magnet 101, the optical disk 20 can be firmly adhered to the turntable 100 of the spindle motor.

In addition, by using the magnetic force acting between the suction mark net 107 provided on the rotor of the spindle motor and the bearing housing 106 provided on the stator, the rotor of the spindle motor 10 does not rise upwards. It can be safely rotated at a fixed position.

However, the clamper yoke 16, the clamper magnet 101, and the adsorption magnet 107 as described above have to use a high-cost magnet having a strong magnetic force, thereby increasing the manufacturing cost of the optical disc drive. When a low cost magnet is used, the floating force generated by the flow of air cannot be completely removed, resulting in a fatal error such as noise generation and damage to the optical disk.

The present invention, for example, in the optical disk drive, optical disk clamping so that the optical disk clamping operation and the rotation operation of the spindle motor can be performed normally without using a high-cost magnet such as clamper yoke, clamper magnet, suction magnet, etc. It is for providing a device.

An optical disk clamping device according to the present invention comprises: a turntable on which an optical disk is mounted; And a clamper in close contact with the turntable to clamp the optical disk, wherein the clamper is an elastic force transmitted by an elastic member provided between a pickup unit base and a base up-down when the turntable approaches and clamps the optical disk. By, in close contact with the turntable,

The elastic member may be a coil spring that contacts the lower surface of the pickup unit base and the upper surface of the base up-down and pushes the pickup unit base upward.

The coil spring is provided so as to surround the body portion of the damper, and a washer of a contact protrusion having a circular shape is provided at a central portion of the clamper cover in contact with the clamper.

The optical disk clamping device according to the present invention uses an elastic force transmitted by an elastic member provided between a pickup unit base and a base up-down, for example, when clamping an optical disk seated on a turntable of a spindle motor in an optical disk drive. By closely contacting the clamper and the turntable of the spindle motor, the optical disk clamping operation and the rotation operation of the spindle motor can be normally performed without using expensive magnets such as clamper yokes, clamper magnets, and suction magnets, as well as optical disks. The manufacturing cost of the drive can be reduced efficiently.

1 shows a configuration of an embodiment of a general optical disk drive,
2 shows a configuration of an embodiment of a typical spindle motor,
3 shows a partial configuration of an embodiment of an optical disk drive according to the present invention,
4 shows a cross-sectional view of an embodiment of a clamping state of an optical disc drive according to the invention,
Figure 5 shows an embodiment in which a washer is installed in the central portion of the clamper cover in accordance with the present invention.

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

First, the optical disk clamping apparatus according to the present invention can be applied to various types of optical disk drives (ODDs) for recording or playing data on optical disks such as CDs, DVDs, BDs, and the like. have.

On the other hand, in the optical disk drive (ODD) to which the present invention is applied, the first damper 31 and the second damper 32 are assembled to the left and right sides of the spindle motor, for example, as shown in FIG. 3. In the body portion of the first damper 31 and the second damper 32, the first coil spring 33 and the second coil spring 34 having elastic force are assembled and installed.

In addition, the first coil spring 33 and the second coil spring 34 are seated on a circular hook that protrudes in the inward direction of the base up-down 30, as shown in FIG. 3.

For example, an optical disc such as a CD, a DVD, a BD, etc. is cut by the AA line shown in FIG. 3 in a state in which the optical disc is normally clamped by the clamper after being seated on the turntable of the spindle motor. If done, it is possible to see a cross-sectional view of the embodiment as shown in FIG.

That is, as shown in FIG. 4, the optical disk 20 is seated on the turntable of the spindle motor 10, and the optical disk 20 is in close contact with the lower surface of the clamper 15 by a normal clamping operation. It becomes a state.

In addition, a clamper cover 14 is installed on the clamper 15, and the clamper cover 14 is bonded to the chassis 13 or is integrated with the chassis 13, thereby providing one The instrument can be made of water.

On the other hand, since the washer 40 which has a circular contact protrusion is provided in the center part of the said clamper cover 14, for example, the said clamper 15 And the frictional force between the clamper cover 13 is minimized.

In addition, as shown in FIG. 4, the first coil spring 33 described above with reference to FIG. 3 is assembled to form a body covering the body portion of the first damper 31, and the base up-down ( Since it is seated on a hook protruding inwardly in the inward direction 30 and is in close contact with the lower surface of the pickup unit base 35, the pickup unit base 35 has an elastic force of the first coil spring 33. By this force, the force is continuously pushed upward.

And. Similarly, the second coil spring 34 is assembled and installed in a form surrounding the body portion of the second damper 32 and is seated on a hook that protrudes in the inward direction of the base up-down 30. Since it is in close contact with the lower surface of the pick-up unit base 35, the pick-up unit base 35 is subjected to a force that continues to be pushed upward by the elastic force of the second coil spring 34.

Accordingly, the clamper 15 may include a first spring provided between the pickup unit base 35 and the base up-down 30 when the turntable of the spindle motor 10 approaches and clamps the optical disc 20. Due to the elastic force transmitted by the coil 33 and the second coil spring 34, it firmly adheres to the turntable of the spindle motor, without using expensive magnets such as clamper yokes, clamper magnets, suction magnets, and the like. In addition, the optical disk clamping operation and the rotation operation of the spindle motor can be normally performed, and the manufacturing cost of the optical disk drive can be efficiently reduced.

Meanwhile, the clamper cover 14 may be manufactured by being integrated with the chassis 13 and one apparatus, and the washer 40 formed with a circular contact protrusion in the center portion of the clamper cover 14 may include: The chassis 13 can be injection molded as a tool.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

10: spindle motor 11: optical pickup
12 tray 13 chassis
14: clamper cover 15: clamper
16: clamper yoke 20: optical disc
30: base up and down 31,32: damper
33,34: coil spring 35: pickup unit base
40: washer 100: turntable
101: clamper magnet 102: rotor magnet
103: stator coil 104: stator plate
105: rotor shaft 106: bearing housing
107: adsorption magnet

Claims (4)

A turntable on which an optical disc is seated; And
Is in close contact with the turntable and comprises a clamper for clamping the optical disk,
And the clamper is in close contact with the turntable by an elastic force transmitted by an elastic member provided between the pickup unit base and the base up-down when the turntable approaches and clamps the optical disc. The method of claim 1,
And the elastic member is a coil spring which contacts the lower surface of the pickup unit base and the upper surface of the base up-down and pushes the pickup unit base upward. The method of claim 2,
The coil spring is provided so as to surround the body portion of the damper. The method of claim 2,
An optical disk clamping device, characterized in that a washer of a contact projection having a circular shape is provided at a central portion of the clamper cover in contact with the clamper.

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