KR20040033716A - A clamp apparatus for disk drive - Google Patents

Abstract

PURPOSE: A clamp device of a disc drive is provided to reduce a vibration of a pickup base when a disc is rotated, and to absorb external impulses. CONSTITUTION: The device comprises a body(52), a hooking wing(58) and an elastic member(59). The body(52), installed at a turntable and having a certain shape, pushes an upper central face of an optical disk. The hooking wing(58), formed around an edge of the body(52) and hooked at a groove of a cabinet, supports the body(52). The elastic member(59), formed around the hooking wing(58), is elastically transformed when the hooking wing(58) is contacted to adjacent parts. The elastic member is transformable because of a transforming hole formed between the body(52) and the hooking wing(58), and is connected to the body(52) and plural connecting parts. The connection parts extend from the circumference of the body(52) along a tangent line of body(52).

Description

A clamp apparatus for disk drive

The present invention relates to a disk drive, and more particularly to a vibration reduction device for reducing the vibration of the pickup base when the disk is rotated.

1 and 2 show the structure of a disk drive according to the prior art. As shown in these figures, the main base 1 forms the frame of the disk drive. In the center of the main base (1) is formed a substantially rectangular through hole and the pickup is provided with a pickup base (3).

The rear end of the pickup base 3 is supported by the dustproof opening 5 on the main base 1. The dustproof opening 5 is formed of a material having elasticity, and supports the pickup base 3 to the main base 1 and blocks transmission of vibration and noise between them.

The pickup base 3 is provided with a spindle motor 7 for rotating the disk. The upper end of the spindle motor 7 is provided with a turntable 8 on which the disk D is seated and rotated by the spindle motor 7. In the center of the upper surface of the turntable 8 is provided an insertion cone 8 'protruding from the center hole of the disk D to the outer circumferential surface. A guide hole 8h is formed at the center of the insertion cone 8 '.

On the pickup base 3, an optical pickup 9 is installed to guide along the guide shaft 10. The optical pickup 9 records a signal by irradiating light onto the signal recording surface of the disk D or reads the recorded signal and is driven by a sled motor (not shown) along the guide shaft 10. Is moved.

On the other hand, the tip of the pickup base 3 is supported by the lifting base 12. Between the lifting base 12 and the pickup base 3 is also equipped with a dustproof opening (5 ') to support the pickup base (3) to the lifting base 12 and at the same time prevent the transmission of noise and vibration. .

The lifting base 12 is provided with a rotation center axis 13 at both ends thereof, and the rotation center axis 13 is inserted into the main base 1 so that the tip of the lifting base 12 is lifted up and down. It becomes the center. Interlocking protrusions 15 are formed at the tip of the elevating base 12.

A loading motor 17 for loading and unloading a tray is provided at the tip of the main base 1. The loading motor 17 performs loading and unloading of the tray as well as raising and lowering the tip of the pickup base 3 in conjunction with loading and unloading of the tray. To this end, the driving force of the loading motor 17 moves the lifting guide 18. The lifting guide 18 is provided with a lifting cam 19 to guide the interlocking protrusion 15.

On the other hand, the clamp 20 is used so that the disk D seated on the turntable 8 does not flow during rotation. The clamp 20 is provided with a magnet 22 in the inside of the clamp body 21 of a substantially disk shape. The lower surface of the clamp body 21 is provided with a guide protrusion 21 'is inserted into the processing hole (8h) of the insertion cone (8'). Hook wings 23 are formed stepwise so as to be at a position higher than the lower surface of the clamp body 21 surrounding the edge of the clamp body 21 on the disc.

The clamp 20 is provided in the groove portion 26 formed in the cabinet 25 to form at least the upper surface and both sides of the disk drive. The recess 26 is formed by recessing the upper surface of the cabinet 25 to be recessed, and the clamp 20 penetrates the recess 25. When the clamp 20 is not seated on the turntable 8, the hook wings 23 are supported by the cabinet 25 by being hooked on the recess 26.

In the prior art having such a configuration, the pick-up base 3 is interlocked with the operation in which the disc D is loaded into the disc drive by the tray, and the tip thereof is raised. Therefore, the disk D moved to the position corresponding to the upper portion of the turntable 8 is raised while seating on the turntable 8 so that the clamp 20 is attached to the turntable 8.

In this case, as shown in FIG. 2, the clamp D is fixed to the turntable 8 while being attached to the turntable 8 by the magnetic force of the magnet 22. The disk D does not slip on the disk. At this time, the guide protrusion 21 'is inserted into the guide hole 8h and the clamp 20 is lifted together with the turntable 8, as shown in FIG. It is in the state which is not hooked to the said groove part 26. FIG.

However, the prior art as described above has the following problems.

That is, as shown in FIG. 2, the spindle motor 7, the turntable 8, the disk D, and the clamp 20 are mounted on the turntable 8 and the disk D is clamped. 20 are integrated so that they are moved together when an impact is applied from the outside.

At this time, a part of the shock is absorbed by the vibration isolation holes 5 and 5 'and the spindle motor 7, the turntable 8, the disk D and the clamp 20 are integrally moved along the direction of the impact. do. In this case, when the direction of impact is in the front, rear, left, and right directions of the disk drive, the hook blade 23 collides with the side wall of the recess 26.

Once the hook wing 23 impinges on the side wall of the recess 26, the clamp 20 can no longer move, but the spindle motor 7 and the turntable 8 that have been moved together with the clamp 20. ) And the disk D try to move in the direction of continuous movement by inertia. Therefore, the guide protrusion 21 'may be damaged or the spindle motor 7 may be deformed due to the tendency of the spindle motor 7 to move.

For reference, when the guide protrusion 21 ′ is broken, a clamping failure of the disk D occurs and a problem such that the disk D is not recognized due to the deformation of the spindle motor 7.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a clamp device capable of absorbing external shocks more smoothly.

1 is a plan view showing the configuration of a disk drive according to the prior art.

2 is a cross-sectional view showing the configuration of a disk drive according to the prior art.

Figure 3 is a cross-sectional view showing the main portion of the disk drive provided with a preferred embodiment of the clamp device according to the present invention.

4 is a plan view of a clamp device constituting an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

30: pickup base 32: spindle motor

34: turntable 35: insertion cone

35 ': Guide ball 36: Dust isolator

38: cabinet 39: groove

39 ': through hole 40: clamp cover

50: clamp 52: clamp body

54: magnet 56: shielding yoke

58: hanger wings 59: deformed portion

59 ': deformation through hole 60: connection part

According to a feature of the present invention for achieving the above object, the present invention is a clamp body of a predetermined shape that is mounted on the turntable on which the disk is seated to press the center upper surface of the disk, and is formed around the edge of the clamp body and It comprises a hook blade that is hooked to the groove portion of the cabinet to support the clamp body, and a deformation portion formed on the hook blade and the hook wing is elastically deformed in contact with the peripheral parts thereof.

The deformable portion is formed around the edge of the hook blade, and is elastically deformable by the deformable through portion formed between the clamp body and the hook wing, and is connected to the clamp body through a plurality of connection parts.

The connecting portion extends in a substantially tangential direction from the outer circumference of the clamp body and is connected to the deforming portion.

The lower surface of the clamp body is formed with a guide protrusion inserted into the guide hole formed in the turntable on which the clamp is seated.

The clamp body is provided with a magnet that provides magnetic force for attachment to the turntable, and the magnet is fixed by the shielding yoke being hooked to the mounting hook of the clamp body.

According to the clamp device of the disk drive according to the present invention having such a configuration, the elastic portion of the hook blade is elastic when the clamp is impacted by the external parts integrally with the turntable under external clamping while the disk is clamped to the turntable. By being deformed, the shock is sufficiently absorbed to prevent damage to the clamp, the turntable and the spindle motor.

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

Fig. 3 is a sectional view showing the main structure of a disk drive provided with a preferred embodiment of the clamp device according to the present invention, and in Fig. 4 the clamp device of the embodiment is shown in plan view.

As shown in these figures, the spindle motor 32 is provided at the tip of the pickup base 30. The upper end of the spindle motor 32 is integrally provided with a turntable 34 on which the disk D is seated. In the center of the upper surface of the turntable 34 is inserted into the insertion cone 35 is inserted into the central through hole of the disk (D) is formed to protrude. A guide hole 35 ′ is drilled in the center of the insertion cone 35.

The pickup base 30 is provided with a dustproof opening 36, the plurality of dustproof openings 36 are provided in a suitable position of the pickup base (30). The anti-vibration opening 36 serves to absorb vibrations between the main base and the pickup base 30 or between the pickup base 30 and the lifting base. The pickup base 30 having such a configuration is installed on the main base so that the tip is lifted about the rear end thereof.

On the other hand, the cabinet 38 is mounted on the main base to form the upper surface and both sides of the disk drive. A space in which the pickup base 30 and the tray are positioned is formed between the cabinet 38 and the main base. A groove 39 is formed in the center of the upper surface of the cabinet 38. The recess 39 is formed by recessing the upper surface of the cabinet 38. The through hole 39 'is drilled through the recess 39 up and down. The inlet of the recess 39 is shielded by the clamp cover 40.

The recess 50 is provided with a clamp 50. The clamp 50 is installed through the through hole 39 ′ of the recess 39. The clamp body 52 constituting the clamp 50 is formed in a substantially disk shape and is seated on the top surface of the turntable 34 and the insertion cone 35. A guide protrusion 53 corresponding to the guide hole 35 ′ is formed at the center of the clamp body 52 so that the clamp 50 can be accurately mounted on the turntable 34.

The magnet 54 is provided on the clamp body 52. The magnet 54 causes the clamp 50 to be magnetically attached to the turntable 34. The magnet 54 is positioned between the clamping body 52 and the shielding yoke 56 installed on the clamp body 52 by the mounting hook 55 formed on the clamp body 52. Reference numeral 56 'denotes a mounting slot on which the mounting hook 55 is mounted.

On the other hand, the hook blade 58 is formed to step around the edge of the clamp body 52. The hook blade 58, as shown in Figure 3, is formed to be higher than the lower surface of the clamp body 52. The hook blade 58 is normally mounted on the bottom surface of the groove 39 so that the clamp 50 is hooked on the groove 39 so that the clamp body 52 opens the through hole 39 '. Through to the bottom of the cabinet 38.

Deformation portion (59) surrounding the edge of the hook wing (58) is provided. The deformable portion 59 forms an edge of the hook wing 58, and as shown in FIG. 4, has a ring shape. The deformable portion 59 is made by forming the deformation through-hole 59 'in the hook wing 58, and the clamp body 52 and the deformable portion 59 are connected by the connecting portion 60. . The connection part 60 extends in a substantially tangential direction from the clamp body 52 and is connected to the deformation part 59. As such, the connection part 60 extends in the tangential direction from the clamp body 52 so that the deformation of the deformation part 59 can be made more smoothly.

Hereinafter, the operation of the clamp device of the disk drive according to the present invention having the configuration as described above will be described.

When the tray is taken out of the disk drive, the tip of the pickup base 30 is lowered. This is to prevent the turntable 34 and the disks D loaded and unloaded from interfering with each other. In addition, the clamp 50 has a hook blade 58 on the bottom surface of the groove portion 39 so that the clamp body 52 has a cabinet 38 through the through hole 39 'of the groove portion 39. Protrudes to the bottom of the state.

In this state, when the disc D is loaded into the disc drive and its center is at a position corresponding to the turntable 34, the tip of the pickup base 30 is raised.

As the tip of the pick-up base 30 rises, the disc D is seated on the turntable 34 provided in the spindle motor 32, and then continuously raised to attach the clamp 50 to the turntable 34. do. In this case, the clamp 50 is slightly raised in the recess 39, and as shown in FIG. 3, the hook blade 58 no longer spans the recess 39.

In this state, the turntable 34 is rotated by the spindle motor 32 so that the disk D rotates together in a fixed state to the turntable 34 by the clamp 50.

On the other hand, as described above, the clamp 50 is attached to the turntable 34 by magnetic force to impact the disk drive in a state in which the spindle motor 32, the turntable 34, the disk D, and the clamp 50 are integrated. This can be applied. At this time, the parts are integrally moved in the direction of the force applied by the impact.

In particular, when an impact is applied to the front, rear, left, and right directions of the disk drive, the hook blade 58 of the clamp 50 strikes the side wall of the recess 39 to cause deformation. That is, when the hook blade 58 of the clamp 50 strikes the side wall, the deformable portion 59 is elastically deformed. Of course, the connection portion 60 may also be elastically deformed.

Such elastic deformation of the deformable portion 59 absorbs the impact that the hook blade 58 of the clamp 50 strikes the side wall of the recess 39 and at the same time, it is relatively heavy and has greater inertia. It also serves to absorb shock generated by the spindle motor 32 or the like which tends to move.

Clamp device of the disk drive according to the present invention as described in detail above forms a deformable portion that is elastically deformable on the hook wing formed around the edge of the clamp body to more smoothly the external shock applied when the clamp is integrated with the spindle motor, turntable, etc. It can be absorbed easily.

Therefore, even if an external shock is applied to the disk drive, damage to the clamp, the spindle motor and the turntable can be obtained.

Claims (5)

A clamp body of a predetermined shape mounted on a turntable on which the disk is seated and pressing the upper surface of the disk; A hook wing formed around the edge of the clamp body and supported on the recess of the cabinet to support the clamp body; Clamping device of the disc drive, characterized in that the hook blade is formed on the hook wing comprises a deformable portion in contact with the peripheral parts and elastically deformed. The method of claim 1, wherein the deformable portion is formed around the edge of the hook blade, the elastic deformation is possible by the deformable through-hole formed between the clamp body and the hook blade is connected to the clamp body through a plurality of connection parts Clamp device for a disk drive characterized in that. 3. The clamping device of claim 2, wherein the connecting portion extends in a substantially tangential direction from an outer circumference of the clamp body and is connected to the deforming portion. The clamping device of any one of claims 1 to 3, wherein the lower surface of the clamp body is formed with a guide protrusion inserted into a guide hole formed in a turntable on which the clamp is seated. [5] The clamp of claim 4, wherein the clamp body is provided with a magnet that provides magnetic force for attachment to a turntable, and the magnet is fixed by engaging a shielding yoke to the mounting hook of the clamp body. Device.