KR19990047083A - Clamping Device for Optical Disc - Google Patents

Abstract

The present invention relates to a clamping apparatus for an optical disk, wherein the clamper and clamper holder for clamping / releasing the optical disk contained in the cartridge on the turntable include the clamping of the clamper relative to the cartridge upon release of the optical disk clamped on the turntable. A horizontal holding member is provided to position the clamper on the same horizontal line with respect to the cover plate to prevent interference, thereby raising the clamper holder and its associated clamper to have the same horizontal line as the cover plate when the optical disc is released. Not only is the ejection space of the cartridge seated above secured, but also the interference of the clamper with the cartridge can be prevented, and in particular, the size of the optical disc recording / reproducing apparatus can be reduced.

Description

Clamping Device for Optical Disc

The present invention relates to a clamping apparatus for an optical disk, and more particularly, to prevent the clamper from interfering with a cartridge when the cartridge seated on a tray is taken out, and to reduce the height of the optical disk recording / reproducing apparatus to a minimum. A clamping apparatus for an optical disk.

In general, an optical disc D housed in a cartridge, i.e., an optical disc on which information is recorded or having a data area and a hub for recording information, is a recording / playback apparatus such as a DVD (Digital Versatile Disc). Loading / unloading by means of recording information in a concentric track or reproducing the recorded information.

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 has a cartridge 10 in which the optical disk D is stored, as shown in FIG. Tray 12 is provided to be seated, the tray 12 is mounted to the case 14 to be taken out and / or retractable, the inside of the case 14, the deck base 16 for lifting up and down Is installed.

A cover plate 20 having a through hole 20a is coupled to an upper portion of the case 14, and a clamp lever 22 having a bent portion 22a penetrated through the through hole 20a is caulked on an upper surface thereof. It is fixed to the bent portion (22a), the clamping device is mounted to be movable.

The clamping device is provided with a clamper holder 24 having a plurality of engaging holes 24a and a clamper 26 coupled to the clamper holder 24 to clamp / release the optical disk, and the clamper 26 has a locking hole 24a. The hook 26a is integrally formed so as to be caught, and the magnetic body 26b is integrally attached to the bottom of the clamper 26.

The upper surface of the deck base 16 is attached to the printed circuit board 30 coupled to the outside of the spindle motor 28, the rotary shaft 28a of the spindle motor 28, the magnet 34 to seat the hub of the optical disk The turntable 32 attached to the upper surface thereof is press-fitted.

In the conventional optical disk clamping device configured as described above, the deck 10 is mounted on the tray 12 by operating the loading mechanism (not shown) installed in the case 14 after mounting the cartridge 10 containing the optical disk D therein. As the base 16 is raised at a predetermined angle, the hub of the optical disk is seated on the turntable 32 coupled to the upper portion thereof.

Thereafter, as the tray 12 is retracted, the clamper holder 24 and the clamper 26, which are movably mounted to the bent portion 22a of the clamp lever 22, are lowered, and the optical disk is turned against the turntable 32. Clamp. That is, as shown in FIG. 2A, a repulsive force generated between the magnetic body 26b and the magnet 34 attached to the bottom surface of the clamper 26 coupled with the hook 26a to the engaging hole 24a of the clamper holder 24. By pressing the hub of the optical disk on the turntable 32, the optical disk is clamped.

On the other hand, when the clamping of the optical disk is released, the clamp lever 22 and the deck base 16 are lifted and lowered in opposite directions by reverse operation of the loading mechanism, respectively, and the magnet 34 of the turntable 32 and the magnetic material attached thereto. The optical disc is released on the turntable 32 as 26b is spaced apart. At this time, as the clamper 26 and the deck base 16 move up and down, a take-out space of the tray 12 on which the cartridge 10 is seated is secured as shown in FIG. 2B.

However, one end of the clamper as it is biased in one direction with respect to the clamp lever as shown in FIG. There was a drawback that the tray could not be easily taken out as the cartridge jammed.

In order to solve this problem, conventionally, the internal space between the deck base and the cover plate is enlarged to secure the ejection space of the cartridge, but there is a problem in that it cannot adequately cope with the trend of thinning the optical disc recording and reproducing apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to raise the clamper holder and the clamper coupled thereto to have the same horizontal line as the cover plate when the optical disk clamped on the turntable is seated on the tray. The present invention provides a clamping device for an optical disk that not only secures an ejection space of the cartridge, but also can prevent interference of the clamper with respect to the cartridge, and in particular, can reduce the size (height) of the optical disk recording and reproducing apparatus.

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

2A is a cross-sectional view showing a state where an optical disk is clamped on a turntable by the clamping device of FIG. 1;

FIG. 2B is a sectional view of the clamping state of the optical disc shown in FIG. 2A;

3 is a cross-sectional view showing a clamping apparatus for an optical disk according to the present invention;

4A and 4B are sectional views showing the optical disk being clamped and released on the turntable by the clamping device of the present invention.

Explanation of symbols on the main parts of the drawings

20: cover plate 22: clamp lever

50: clamper holder 50a: locking hole

52: clamper 52a: hook

54: magnet

A feature of the present invention for achieving the above object is, the spindle motor is fixed to the upper deck base, a turntable on which the optical disk accommodated in the cartridge is seated on the rotating shaft of the spindle motor, the light on the turntable upper side A clamping device for an optical disk having a clamper for clamping a disk and a clamp coupled to the clamper, wherein the clamper prevents the clamper from interfering with the cartridge upon release of the optical disk clamped on the turntable. A horizontal holding member is provided which positions the clamper on the same horizontal line with respect to the cover plate.

The horizontal holding member according to the present invention is achieved by a magnet attached to the upper surface of the clamper.

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 spindle motor 28 is provided on the deck base 16 to provide a driving force to rotate the optical disk at a linear speed. The outer circumferential surface is coupled to the printed circuit board 30 to apply an external current to the spindle motor 28, the turntable 32 having a magnet so that the hub of the optical disk is seated on the rotating shaft 28a of the spindle motor 28 Is press-fitted.

The cover plate 20 coupled with the case 14 is positioned on the upper side of the turntable 32, and the clamp lever 22 having the bent portion 22a is fixed to the upper surface of the cover plate 20 by caulking. The clamping device is mounted on the 22a to clamp and / or release the optical disk contained in the cartridge 10 with respect to the turntable 32.

The clamping device is provided with a clamper holder 50 having a plurality of engaging holes 50a and a clamper 52 coupled to the clamper holder 50 to clamp / release the optical disk seated on the turntable 32. The hook 52a is integrally formed in the 52 so as to be caught by the locking hole 50a.

In addition, the clamper 52 is provided with a horizontal holding member so that the clamper 52 can be positioned on the same horizontal line with respect to the cover plate 20 when the optical disk is released. The horizontal holding member is attached to the upper surface of the clamper 52. Magnet 54 is provided.

Here, in the distance r1 between the magnet 54 attached to the clamper 52 and the turntable 32, and the separation distance r between the magnet 54 and the clamper lever 22, the condition of r> r1 is satisfied. do.

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

When the tray 12 on which the cartridge 10 is mounted is inserted into the case, the hub of the optical disk is seated on the turntable 32 fixed to the upper portion of the deck base 16 at a predetermined angle, and the optical disk is It is clamped by the lowered clamper 52 as the tray 12 is retracted.

That is, since the magnet 54 attached to the upper surface of the clamper 52 has a distance r1 from the surface of the turntable 32 closer than the distance r from the clamper lever 22, the magnet 54 and the turntable 32 are closer to each other. The optical disk is clamped by the repulsive force generated therebetween.

Then, when releasing the clamping of the optical disk, if the deck base 16 and the clamp lever 22 return to the initial position, the distance r1 of the clamper 52 relative to the turntable 32 is the clamper lever 22. The magnet 54 is in close contact with the lower surface of the clamper lever 22 as it is wider than the distance r with respect to the clamper lever 22.

Thus, the clamper 52 is positioned on the same horizontal line with respect to the cover plate 20 as in FIG. 4B to prevent interference between the cartridge 10 and the clamper 52 seated thereon upon taking out of the tray 12. You can do it.

According to the clamping apparatus of the optical disk according to the present invention as described above, the cartridge seated on the tray by raising the clamper holder and the clamper coupled thereto to have the same horizontal line as the cover plate upon release of the optical disk clamped on the turntable In addition to ensuring the take-out space of, the interference of the clamper to the cartridge can be prevented, and in particular, the size (height) of the optical disc recording / reproducing apparatus can be reduced.

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 (4)

The spindle motor is fixed to an upper part of the deck base, and a turntable on which the optical disk housed in the cartridge is seated is pressed into the rotating shaft of the spindle motor, and a clamper for clamping the optical disk and a clamp coupled to the clamper are provided on the upper side of the turntable. In the clamping device of the optical disk, The clamper is provided with a horizontal holding member for positioning the clamper on the same horizontal line with respect to the cover plate so that the clamper does not interfere with the cartridge upon release of the optical disk clamped on the turntable. Clamping device for the disc. The clamping apparatus of claim 1, wherein the horizontal holding member is made of a magnet attached to an upper surface of the clamper. 3. The clamping apparatus of claim 2, wherein the magnet has a shorter distance (r1) from the turntable than a distance (r) of the clamper lever when clamping the optical disc. 3. The clamping apparatus of claim 2, wherein the magnet has a distance (r1) from the turntable longer than the distance (r) of the clapper lever when the clamping of the optical disc is released.