KR100265636B1 - Clamping apparatus of an optical disc - Google Patents

Abstract

PURPOSE: A clamping mechanism of an optical disk is provided to separate a clamper from a turntable by a predetermined distance when an optical disk is not loaded on the turntable. CONSTITUTION: A spindle motor(14) is fixed to a deck base to generate a drive force for rotating an optical disk at linear velocity. A loading unit is mounted on a rotatable shaft(14a) of the spindle motor to load the optical disk. The loading unit has a turntable(50) including a loading portion(52) for loading the disk and a circular portion(54) protruded in the center with slit grooves(54a) at both sides. A magnet(56) is set on the circular portion. A clamper(64) is inserted into the guide clamp to clamp or unclamp the disk from the loading portion of the turntable. Coil springs(78) are formed in the slit grooves to separate the clamper from the turntable when the disk is not loaded. Thereby, the repulsive force does not become weaker by a magnetic force between the turntable and the clamper. The clamping force is kept regular to prevent the optical disk from slipping.

Description

Clamping Device for Optical Disc

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamping apparatus for an optical disk, and more particularly, to an clamping apparatus for an optical disk that enables the clamping force to be uniformly maintained regardless of whether the optical disk is placed on a turntable.

In general, the optical disc D records or reproduces information in a concentric track while being loaded / unloaded by a recording / reproducing apparatus.

A conventional clamping device for clamping and / or releasing an optical disk loaded by the optical disk recording / reproducing apparatus with respect to a turntable rotating in a linear velocity manner is as shown in Figs. The deck base 10 is installed in the case (not shown) in which the optical disk D is taken out and / or drawn in, and thus can be moved up and down, and the spindle motor 14 is disposed on the deck base 10. Is fixed to the bracket 12 is coupled.

A turntable 16 is pressed into the rotating shaft 14a of the spindle motor 14 to seat the non-magnetic portion of the optical disk, and an upper side of the turntable 16 clamps and / or releases the optical disk with respect to the turntable 16. The clamping device is coupled to the guide clamp 18 so that the clamping device is lifted up and down when the optical disk is taken out / retracted.

The clamping device is coupled to the clamper holder 20 and the clamper holder 20 in which the plurality of engaging holes 20a are formed, and the clamper 22 and the clamper holder 20 for clamping / releasing the optical disk seated on the turntable 16. It is attached to the bottom surface is provided with a plate (magnet) 24 for imparting the clamping force, the clamper 22 is integrally formed with a hook 22a to be caught by the engaging hole (20a).

In the conventional optical disk clamping device configured as described above, when the optical disk D is seated on a tray (not shown) and the loading mechanism installed in the case is operated, the deck base 10 is raised at a predetermined angle and coupled to the upper portion thereof. The nonmagnetic portion of the optical disk is seated on the turntable 16.

Then, as the tray is retracted, the clamper 22 coupled with the clamper holder 20 is lowered to clamp the optical disk against the turntable 16. That is, the lower surface of the clamper 22 coupled with the hook 22a to the engaging hole 20a of the clamper holder 20 presses the non-magnetic portion of the optical disk on the turntable 16 and the lower surface of the clamper holder 20. The optical disk is loaded by clamping by the repulsive force generated in the attached plate 24.

On the other hand, when the clamping of the optical disk is released, the deck base 10 is lowered due to the reverse operation of the loading mechanism and the clamping holder 20 is lifted by the guide clamp 18 to lift the optical disk with respect to the turntable 16. Release the clamping.

However, even when the optical disk is not seated on the turntable as described above, the surface of the clamper and the turntable is always in close contact by the repulsive force of the plate, so that the repulsive force of the plate is weakened. There was a problem that slip phenomenon occurs for the clamper when the disk rotates.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a clamping apparatus for an optical disk that can space the clamper at regular intervals with respect to the turntable when the optical disk is not seated on the turntable.

Another object of the present invention is to prevent the weakening of the repulsive force by magnetization with the turntable, as well as to manage the clamping force uniformly, thereby clamping the optical disk which can prevent the slip phenomenon by reliably clamping the optical disk To provide a device.

1 is a cross-sectional view showing a clamping apparatus of a conventional optical disk,

FIG. 2 is a cross-sectional view illustrating a state in which an optical disk is clamped on a turntable by the clamping device of FIG. 1;

3 is an exploded perspective view showing a clamping apparatus for an optical disk according to the present invention;

4 is a cross-sectional view of the clamping device of the optical disk shown in FIG.

5 is a cross-sectional view showing a state where the optical disk is clamped on the turntable by the clamping device according to the present invention.

Explanation of symbols on the main parts of the drawings

10: deck base 12: bracket

14: spindle motor 14a; Axis of rotation

50: turntable 52: seating portion

54: circular portion 54a: incision groove

56: magnet 60: guide clamp

62: iron piece 64: clamper

70: hinge pin 72,76: first and second lever

74: fixed pin 78: coil spring

A feature of the present invention for achieving the above object is an optical disk clamping apparatus for clamping an optical disk, comprising: a mounting means provided to mount the optical disk; A clamper positioned at an upper side of the seating means and clamping the optical disk seated on the seating means; And a space keeping means provided in the seating means so as to space the seating means at a predetermined interval from the clamper when the optical disk is not seated on the seating means.

According to a preferred embodiment of the present invention, the seating means may include a seating part on which the optical disk is seated, and a turntable including a circular part protruding to have cutouts at both sides in the center of the seating part, and a magnet attached to the upper surface of the circular part. Is achieved.

The gap maintaining means according to the preferred embodiment of the present invention is interlocked with the first lever being fixed to the upper side of the first lever and the first lever that is rotatably fixed to the cutting groove of the circular portion with a hinge pin. One end is connected to each of the second lever and the bottom surface of the first lever and the turntable to achieve a coil spring for returning the first lever to an initial position.

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

3 is a view illustrating a clamping device according to the present invention, in which a bracket motor coupled to an upper surface of the deck base 10 is fixed a spindle motor 14 for providing a driving force to rotate the optical disk at a linear speed. The mounting means is pressed into the rotating shaft 14a of the spindle motor 14 so that the optical disk is seated thereon.

The seating means is provided with a turntable (50) consisting of a seating portion (52) on which an optical disk is seated and a circular portion (54) protruding to have a cutout groove (54a) at both sides at the center thereof, and an upper surface of the circular portion (54). A magnet 56 is attached thereto, and the guide clamp 60 fixed to the cover plate (not shown) coupled to the case is fixed to the turntable 50 by the caulking. In addition, the clamp clamp 64 in which the steel plate 62 is integrally injection-molded is inserted into the guide clamp 60 so that the optical disk can be clamped and / or released from the seating portion 52 of the turntable 50. Lose.

The cutting groove 54a of the circular portion 54 is provided with a space keeping means for spaced apart the clamper 64 with respect to the turntable 50 when the optical disk is not seated on the seating portion 52, The gap maintaining means is fixed to the upper side of the first lever 72 and the first lever 72 and rotatably fixed by the hinge pin 70 to the incision groove 54a, and thus the first lever. One end is connected to the bottom surface of the second lever 76 and the first lever 72 and the turntable 60, which interlock with the 72, and the coil spring for returning the first lever 72 to the initial position ( 78).

The operation of the clamping apparatus of the optical disk according to the present invention configured as described above will be described in detail with reference to FIGS. 4 and 5.

When the optical disk D is inserted into the case, the non-magnetic portion of the optical disk is seated on the seating portion 52 of the turntable 50 fixed to the upper portion of the deck base 10 at a predetermined angle. It is clamped by the lowered clamper 64 as the disk is retracted. That is, when the optical disk seated on the seating portion 52 of the turntable 50 presses one end of the first lever 72 fixed to the cutout groove 54a of the circular portion 54, the first lever 72 is pressed. ) Rotates around the hinge pin 70 as the coil spring 78 is compressed, and at the same time the first lever 72 and the second lever 76 fixed by the fixing pin 74 interlock with each other. It is rotated in the reverse direction with respect to 72 and is released from the lower surface of the clamper 64.

Thereafter, the clamper 64 fitted to the guide clamper 60 descends, and the light is reduced by the repulsive force generated between the iron piece 62 integrally injection-molded and the magnet 56 attached to the upper surface of the circular portion 54. Is to clamp the disk.

Then, when the optical disk seated on the mounting portion 52 of the turntable 50, the first lever 72 is returned to the initial position by the tension force of the compressed coil spring 78, the first lever ( 72 and the one surface of the second lever 76 fixed with the fixing pin 74 are in contact with the inner wall surface of the incision groove 54a and the upper surface of the second lever 76 abuts against the lower surface of the clamper 64. The clamp 64 is spaced apart from the turntable 50 at regular intervals.

That is, the clamping force of the magnet 56 may be maintained uniformly by preventing the upper surface of the seating portion 52 of the turntable 50 and the bottom surface of the clamp 64 from coming into close contact with each other.

As described above, according to the clamping apparatus of the optical disk according to the present invention, when the optical disk is not seated on the turntable, the clamper is spaced at a predetermined interval from the turntable to prevent weakening of the repulsive force by magnetization with the turntable. Of course, the clamping force can be managed uniformly, and in particular, the optical disk can be reliably clamped to prevent slippage.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (2)

An optical disk clamping device having a turntable driven by a spindle motor and a clamper for clamping and unclamping an optical disk seated on the turntable, The turntable may include a seating portion on which the optical disk is mounted, a circular portion protruding from the center of the seating portion, and a cutout groove facing in the radial direction, and provided with a space keeping means for maintaining a predetermined distance with respect to the clamper; It is provided with a magnet attached to the upper surface of the circular portion, The gap maintaining means includes a first lever that is pivotally fixed by a hinge pin, a second lever that is fixed to an upper side of the first lever by a fixing pin, and interlocks with the first lever, and the first lever is incised. One end is connected to the bottom surface of the groove, the clamping device of the optical disk, characterized in that it comprises a coil spring for returning the first lever to the initial position. The clamping apparatus of claim 1, wherein the clamper is integrally injection-molded so that repulsion is generated together with the magnet of the turntable.

Images