KR200151764Y1 - Apparatus for clamping a disc of an optical disc player - Google Patents

Abstract

The present invention discloses a disc clamping device for an optical disc player.

According to the present invention, in the optical disc player for reproducing or recording information by clamping the disc by the operation of the clamping chassis on the upper surface of the turntable, a plurality of fitting protrusions on the outer circumferential surface of the guide boss are arranged at equal intervals along the axis center. A tent table formed; A guide hub having a guide hole is formed to coincide with the guide boss of the tentable, and a plurality of fitting protrusions and fitting grooves are alternately along the center of the shaft so that the fitting bosses of the guide boss correspond to each other on the inner circumferential surface of the guide hole. It includes a clamp formed by.

Therefore, even when shock and vibration are transmitted, the clamping state of the disk is maintained accurately and stably so that the rotational motion of the disk is naturally and stably performed, and the reproducibility of the disk is improved to significantly improve the reliability of the product. .

In particular, the slip is effectively prevented during the high-speed rotation of the ten table is to significantly improve the reliability of the product.

Description

Disc clamping device for optical disc players

The present invention relates to an optical disc player, and more particularly, to a disc clamping apparatus of an optical disc player in which a disc is clamped accurately and stably.

In general, an optical disc player such as a laser disc player (LDP), a compact disc player (CDP), and the like, a disc is loaded on a turntable by driving a loading mechanism, and thus a clamping unit It is clamped by an operation and reproduces or records information of a disc by driving a pick-up unit.

In such an optical disc player, as shown in FIG. 1, a drive unit 11 is installed inside a main chassis 10. As shown in FIG. The drive unit 11 is equipped with a spindle motor 13 in front of the base plate 12, and a disk D mounted on the turntable 14 by driving the spindle motor 13. Is rotated.

In addition, a clamping chassis 15 is positioned and installed above the turntable 14, and a clamp 16 is mounted at the center of the clamping chassis 15.

Therefore, when the disk D is loaded and seated on the upper surface of the turntable 14, the clamping chassis 15 located above the turntable 14 is operated to clamp the disk D by the clamp 16. The information of the disc D is reproduced or recorded by driving the pickup unit 17.

In the disc clamping apparatus of the conventional optical disc player as described above, a guide boss 21 is formed in the center of the turntable 20 that is rotated by the drive of the spin motor 13, and the guide boss 21 is formed. A hub 22 fitted into the center hole Dh of the disk D is formed to be concentric on the outer side of the 21.

Meanwhile, the clamp 25 is movably mounted in the front center of the clamping chassis 15, and is guided to the guide boss 21 of the tentable 20 at the center of the clamp 25 so as to be centered. Guide hub 26 with 26A) is formed.

On top of the guide hub 26 a push knob 27 is supported on a support plate 15A of the clamping chassis 15 to impart a predetermined clamping force, ie a pressing force, to the disk D. Is formed.

Therefore, when the clamping chassis 15 is operated while the center hole Dh of the disk D is seated in the hub 22 of the tentable 20, the clamp 25 is guide hole of the guide hub 26. Centering is performed while 26A is fitted to the guide boss 21 of the turntable 20.

However, in the disc clamping apparatus of the conventional optical disc player as described above, the disc D is clamped between the upper surface of the turntable 20 and the lower surface of the clamp 25, but is transmitted to the turntable 20 and the clamp 25. There was a problem that the clamping state is unstable by the external shock and vibration.

That is, the clamp 25 imparts a clamping force by pressing the clamp area of the disk D from the top to the turntable 20 side, but the clamping state is unstable as the clamp 25 flows due to external shock and vibration. Will be done.

In addition, a slip occurs between the turntable 20 and the disk D or the clamp 25 and the disk D during the high speed rotation of the tentable 20, thereby causing a problem in the rotational motion of the disk D. Therefore, there is a problem in that the reproduction characteristics of the disc D are adversely affected and the reliability of the product is greatly reduced.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to maintain the accurate and stable clamping state of the disk, to improve the playback characteristics of the disk to improve the reliability of the product The present invention provides a disk clamping device for an optical disk player.

A feature of the present invention for achieving the above object is, in the optical disc player for playing or recording information by clamping the disc by the operation of the clamping chassis on the upper surface of the turntable, a plurality of fitting projections on the outer peripheral surface of the outer peripheral surface of the guide boss Tentables are formed are arranged at equal intervals along the axis center; A guide hub having a guide hole is formed to coincide with the guide boss of the tentable, and a plurality of fitting protrusions and fitting grooves are alternately along the center of the shaft so that the fitting bosses of the guide boss correspond to each other on the inner circumferential surface of the guide hole. In the disk clamping apparatus of the optical disk player comprising a clamp formed by.

1 is a plan view illustrating a general optical disc player.

2 is a cross-sectional view showing a disk clamping apparatus of a conventional optical disk player.

Figure 3 is a perspective view showing a disk clamping device of the optical disk player according to the present invention

Figure 4 is a cross-sectional view showing a disk clamping device of the optical disk player according to the present invention

5 is an enlarged cross-sectional view partially showing a disk clamping device of an optical disk player according to the present invention;

Explanation of symbols for main parts of the drawings

10; Main chassis 11; Drive unit

13; Spindle motor 15; Clamping chassis

30; Tentable 31; Guide boss

32; Fitting 40 (of tentable); clamp

41; Guide hub 42A; Fitting (of clamp)

42B; Fitting groove D (of clamp); disk

Hereinafter, one 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.

3 to 5 are diagrams for explaining the disk clamping apparatus of the optical disk player according to the present invention, the basic configuration of the optical disk player described in Figure 1 will be described with the same reference numerals.

First, referring to FIG. 1, the drive unit 11 is installed inside the main chassis 10, and the drive unit 11 is mounted with the spindle motor 13 in front of the base plate 12. .

As shown in FIGS. 3 and 4, the turntable 30 mounted to be rotated by the drive of the spin motor 13 has a guide boss 31 formed at the center thereof, and a plurality of guide bosses 31 are formed on the outer circumferential surface of the guide boss 31. The fitting protrusions 32 are formed to be arranged at equal intervals. At this time, the fitting protrusions 32 are formed in a substantially tooth shape.

In addition, the fitting protrusions 32 of the guide boss 31 are vertically formed along the axial center, and the hubs 32 fitted to the center hole Dh of the disk D are disposed outside the guide boss 31. It is formed concentrically.

Meanwhile, the clamping chassis 15 is positioned and installed on the turntable 30, and the clamp 40 is movably mounted in the front center of the clamping chassis 15. A guide hub 41 having a guide hole 41A is formed in the center of the clamp 40 so that the center of the clamp 40 coincides with the guide boss 31 of the tent table 30.

In addition, the clamp 40 has a plurality of fitting protrusions 42A and fitting grooves 42B alternately so that the fitting protrusions 32 of the guide boss 31 correspond to each other on the inner circumferential surface of the guide hole 41A. ) Is formed.

At this time, the fitting protrusions 42A of the clamp 40 have a gear shape, and the fitting protrusions 42A and the fitting grooves 42B form a spline shaft as a whole, and the fitting protrusions 42A and the fitting protrusions 42A. The fitting grooves 42B are formed vertically along the axis center.

Here, the fitting protrusions 32 of the ten table 30 indicate that three are formed at equal intervals on the outer circumferential surface of the guide boss 31, and the fitting protrusions 42A and the fitting groove 42B of the clamp 40 are formed. 6 showed that they were formed, but their numbers and sizes can be changed as appropriate. In addition, it is easily understood that the shapes of the fitting protrusions 32 of the tentable 30 and the fitting protrusions 42A of the clamp 40 and the fitting grooves 42B can also be appropriately changed to a semicircular shape or the like.

In addition, the clamp 40 is supported by the supporting plate 15A of the clamping chassis 15 on the upper part of the guide boss 41 to push the disk D to a predetermined clamping force, that is, a push knob 43. Is formed.

The operation of the disc clamping device of the optical disc player as described above is as follows.

As shown in FIGS. 4 and 5, when the clamping chassis 15 is operated while the center hole Dh of the disk D is inserted and seated in the hub 32 of the tentable 30, the turntable 30 may be operated. The guide boss 31 and the guide boss 41 of the clamp 40 are centered with each other to clamp the disk D.

In this process, the fitting protrusions 32 formed on the guide boss 31 of the turntable 30 correspond to each other to the fitting grooves 42B formed on the guide boss 41 of the clamp 40.

For example, in the state where the fitting protrusions 32 of the turntable 30 and the fitting protrusions 42A of the clamp 40 are in contact with each other, the fitting protrusions 32 are the fitting protrusions 42A while they are offset from each other. Guided by the fitting grooves 42B between the fitting protrusions 42A to clamp the disk (D).

When the fitting protrusions 32 of the tentable 30 correspond to each other and fit into the fitting grooves 42B of the clamp 40, the support plate 15A of the clamping chassis 15 is push-pushed of the clamp 40. 43 is pressed by a predetermined force. Therefore, the disk D is clamped by applying a predetermined clamping force between the tentable 30 and the clamp 40.

Then, in the state where the disk D is clamped between the tentable 30 and the clamp 40, the disk (by driving the pickup unit 17 while the tentable 30 is rotated by the drive of the spindle motor 13). The information in D) is reproduced or recorded.

At this time, since the fitting protrusions 32 of the tentable 30 and the fitting grooves 42B of the clamp 40 are rotated to each other, the external shock and vibration are transmitted to the tentable 30 and the clamp 40. The flow of the tentable 30 is prevented.

That is, the tentable 30 is easily shaken by external shocks and vibrations, but the clamping state may remain unstable, but the rotation is performed while the fitting protrusions 32 and the fitting grooves 42B are fitted to each other. The clamping state of the disk D is kept accurate and stable.

Therefore, since the rotational motion of the disk D is performed naturally and stably, the reproduction characteristics of the disk D are improved. Further, the fitting protrusions 32 and the fitting grooves 42B are slid between the turntable 30 and the disk D or the clamp 40 and the disk D during the high speed rotation of the tentable 30. This is effectively prevented, so that the reproduction characteristics of the disc D are improved, and as a result, the reliability of the product is remarkably improved.

On the other hand, the above embodiment is merely to describe one preferred embodiment of the present invention, the scope of the present invention is not limited to such, and can be changed appropriately within the scope of the same thought, for example, circular Alternatively, the present invention can be widely applied to chucking media such as plate-shaped bodies.

As described above, according to the disk clamping apparatus of the optical disk player according to the present invention, the disk clamping state is maintained accurately and stably even when shock and vibration are transmitted, so that the rotational motion of the disk is naturally and stably performed. The reproducibility of the product is improved, and the reliability of the product is remarkably improved. In particular, the slip is effectively prevented during the high-speed rotation of the ten table is to significantly improve the reliability of the product.

Claims (1)

An optical disc player for reproducing or recording information by clamping a disc by an operation of a clamping chassis on an upper surface of a turntable, A ten table 30 formed on the outer circumferential surface of the guide boss 31 with a plurality of fitting protrusions 32 arranged at equal intervals along the axial center; A guide hub 41 having a guide hole 41A is formed so that its center coincides with the guide boss 31 of the tent table 30, and the fitting boss of the guide boss 31 is formed on the inner circumferential surface of the guide hole 41A. Disc clamping device of the optical disc player, characterized in that it comprises a clamp 40, the plurality of fitting protrusions 42A and the fitting grooves 42B are alternately formed along the axial center so that the 32 are correspondingly fitted to each other. .