KR20080060813A - Clamping apparatus for optical disk drive - Google Patents

Abstract

A clamping apparatus for an optical disk drive is provided to match the centers of a clamp and a turn table so as to reduce noise resulting from clamping the clamp on the insertion cone of the turn table. A clamping apparatus for an optical disk drive comprises a clamp(30), and a catching part(42). The clamp is selectively combined with a turn table(24) to fix a disk(D), and is formed with a flange(36). The catching part is installed with a clamp through hole(43) and catches the flange of the clamp at an edge of the clamp through hole. When the clamp is mounted on the turn table, the centers of the clamp and the turn table meet with each other. A guide surface(45) of the catching part is inclined upward in the centrifugal direction of the clamp through hole.

Description

Clamping apparatus for optical disk drive

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

Figure 2 is a cross-sectional view showing a clamping device and a peripheral configuration of an optical disk drive according to the prior art.

Fig. 3 is a partial sectional view showing the main structure of an optical disk drive employing a preferred embodiment of the clamping device according to the present invention.

Figure 4 is a partial cross-sectional view showing a state in which the clamp is hooked to the hook portion in a preferred embodiment of the present invention.

Figure 5 is an operating state showing the state in which the clamping force is applied to the clamp in a preferred embodiment of the present invention.

Fig. 6 is a partial sectional view showing the main structure of a disk drive in which another embodiment of the present invention is employed.

Explanation of symbols on the main parts of the drawings

20: pickup base 22: spindle motor

24: turntable 26: insertion cone

27: guide hole 30: clamp

32: cone seating groove 33: guide protrusion

M: Magnet 36: Hook wing

40: cabinet 42: hanger

43: clamp hole 45: guide surface

The present invention relates to an optical disk drive, and more particularly, to a clamping apparatus of an optical disk drive for rotatably fixing a disk to a turntable.

1 and 2 show the configuration of an optical disc 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. A friction member (not shown) is installed in a circular shape surrounding the top edge of the turntable 8. The friction member (not shown) allows the disk D to be fixed without slipping between the turntable 8 and the clamp 15 to be described below. In the center of the upper surface of the turn table 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 the signal by irradiating light onto the signal recording surface of the disk D or reads the recorded signal, which is driven by a sled motor (not shown) to move along the guide shaft 10. do.

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.

On the other hand, a configuration of the clamping device for preventing the disk D seated on the turntable 8 from flowing during rotation will be described. It is the clamp 15 that fixes the disk D to the turntable 8. The clamp 15 is formed in a substantially disk shape, the magnet (M) is installed inside. The lower surface of the clamp 15 is provided with a guide protrusion 18 inserted into the guide hole (8h) of the insertion cone (8 '). Hook wings 18 'are formed stepwise so as to be at a position higher than a lower surface of the clamp 15 surrounding the edge of the clamp 15 on the disc.

The clamp 15 is provided in a recess 19 'formed by being enclosed in a cabinet 19 which forms at least an upper surface of the disk drive and both sides of the disk drive. The recess 19 'is formed by recessing an upper surface of the cabinet 19 to be recessed, and the clamp 15 penetrates the recess 19'. When the clamp 15 is not seated on the turntable 8, the hook wing 18 ′ is supported on the cabinet 19 by being hooked on the groove portion 19 ′.

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 top of the turntable (8)

Ascending while seating on turntable 8, the clamp 15 is attached to turntable 8.

In this case, as shown in FIG. 2, the clamp D is attached to the turntable 8 by the magnetic force of the magnet M, and the disk D seated on the turntable 8 is fixed to the turntable 8. The disk D does not slip on the disk.

Then, the guide protrusion 18 is inserted into the guide hole (8h) and the clamp 15 is lifted together with the turntable (8), as shown in Figure 2, the hook blade 18 ' It is in the state which is not hooked to the said groove part 19 '.

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

The insertion cone 8 ′ inserted into the central hole of the disc D is generally formed of a metal material or provided with a separate magnetic material therein. At this time, while the clamp 15 is clamped to the insertion cone 8 ′ in a state in which the disk D is not seated or seated on the turntable 8, the parts engaged with each other directly collide with each other to generate noise.

Therefore, an object of the present invention is to solve the problems of the prior art as described above, to provide a clamping device configured to reduce the noise generated in the process of clamping the clamp to the insertion cone.

According to a feature of the present invention for achieving the above object, the present invention is selectively coupled to the turntable to fix the disk, the clamp is formed with a hook wing to be relatively more protruded around the outer peripheral surface edge, and the clamp penetrates And a hook portion provided with a clamp hole positioned to support the hook wing of the clamp at an edge of the clamp hole, wherein the clamp is supported to be spaced apart from the center of the clamp hole by a predetermined distance. The center of the clamp coincides with the center of the turntable when the clamp is seated on the turntable.

The hook portion has a guide surface formed to be inclined upward in the centrifugal direction of the clamp through at one side of the bottom surface corresponding to the edge of the clamp through.

According to another feature of the invention, the present invention is selectively coupled to the turntable to fix the disk, the clamp is a hook wing is formed to be relatively more protruded around the outer peripheral surface edge, and the clamp hole through which the clamp is located And a hook portion configured to hold the hook wing of the clamp at an edge of the clamp hole, wherein the clamp is supported to be in line with the center of the clamp hole and the clamp is seated on the turntable. The center of the clamp hole and the center of the turntable is configured to be spaced apart by a predetermined interval.

According to the optical disk drive according to the present invention having such a configuration, the clamp is supported on the hook portion so that the center thereof is spaced apart from the center of the turntable by a predetermined interval so that the clamp is seated on the turntable inclined from the top of the turntable during the loading operation of the disk. The contact area between the clamp and the turntable is gradually increased, which reduces the noise generated when clamping.

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

FIG. 3 is a partial cross-sectional view showing the main structure of an optical disk drive employing a preferred embodiment of the clamping device according to the present invention.

According to this, the spindle motor 22 is installed on the pickup base 20 installed inside the optical disc drive. The spindle motor 22 provides a driving force for the rotation of the disk (D). The turntable 24 is installed on the rotating shaft of the spindle motor 22. The disk D is seated on the turntable 24. An insertion cone 26 is provided at the center of the turntable 24, and a guide hole 27 is formed at the center of the insertion cone 26.

The clamp 30 is in close contact with the disk D seated on the turntable 24 to rotate integrally. Cone mounting groove 32 is formed on the lower surface of the clamp (30). Guide cones 33 protrude from the cone seating grooves 32 so as to face the insertion cones 26 of the turntable 24. Here, the cone seating groove 32 and the guide protrusion 33 is to serve to accurately seat the clamp 30 on the turntable 24, a configuration different from the illustrated embodiment may be employed.

The magnet M is provided inside the clamp 30. The magnet (M) is preferably provided inside the clamp 30 corresponding to the cone seating groove (32). The magnet (M) is such that the clamp 30 is attached to the insertion cone 26 by the magnetic force. To this end, the insertion cone 26 is provided with a magnet (M). In the illustrated embodiment, the magnet M is provided on the top surface of the insertion cone 26, but is not necessarily limited thereto. For example, the insertion cone 26 may itself be a magnetic material.

The clamp 30 has a larger diameter at the upper end than the lower end thereof, and a hook wing 36 surrounding the upper end of the clamp 30 is formed. When the pickup base 20 is relatively lowered and the clamp 30 is separated from the turntable 24, the clamp 30 serves to be supported by the hook portion 42 to be described below.

The cabinet 40 constitutes an external appearance of an optical disc drive, and a hook portion 42 is provided at one side thereof. The hook portion 42 is formed so that one side of the cabinet 40 is recessed. In the center of the hook portion 42 is formed a clamp through-hole 43 through which the clamp 30 penetrates. The clamp hole 43 has a diameter larger than the diameter of the lower end of the clamp 30, and has a diameter smaller than the diameter of the upper end of the clamp 30 with the hanger wings (36). Therefore, the hook wing 36 is hooked to the bottom surface of the hook portion 42 corresponding to the edge of the clamp hole 43 so that the clamp 30 may be supported by the hook portion 42. In the illustrated embodiment, the hook portion 42 is formed integrally with the cabinet 40, but may be manufactured separately and attached. Reference numeral 42 'is a shielding plate that shields the inside of the hook portion 42 from the outside.

On the other hand, in the present embodiment, the guide surface 45 is formed on one side of the bottom surface of the hook portion (36) of the hook portion 42 is hooked. The guide surface 45 is for returning the clamp 30 to the original position during the unloading operation of the disk D. The guide surface 45 is provided to be inclined upward in the centrifugal direction of the clamp through hole 36 on one side of the bottom surface of the hook portion 42. The guide surface 45 allows the clamp 30 to be inclinedly supported by the hook portion 42.

Hereinafter, the operation of the clamping apparatus of the optical disk drive according to the present invention having the configuration as described above will be described with reference to the accompanying drawings.

4 shows a state in which the clamp 30 is engaged with the hook portion 42. At this time, since the turntable 24 is relatively lowered to the clamp 30 positioned in the clamp hole 43, the hook wing 36 is supported in a state of being hooked to the hook portion 42. . At this time, the clamp 30 is inclined to the hook portion 42 due to the shape of the guide surface 45.

When the pickup base 20 is raised while a tray (not shown) for loading a disc is inserted in the above state, the clamp 30 is seated on the turntable 24. That is, while the inclined surface of the insertion cone 26 is located in the cone seating groove 32 of the clamp 30, the inclined surface of the insertion cone 26 is in contact with the inclined surface of the cone seating groove 32 before the upper surface of the insertion cone 26, Next, the clamp 30 is lifted in contact with the upper surface of the cone seating groove 32. At this time, the clamp 30 is moved to the right in the drawing by a predetermined distance so that the center of the clamp 30 and the center of the clamp hole 43 is matched. The clamp 30 is attached to the turntable 24 by the magnetic force or the magnetic weight of the magnet M.

In this state, as shown in FIG. 3, the hook blade 36 of the clamp 30 is no longer supported by the hook portion 42. Therefore, the clamp 30 can rotate integrally with the turntable 24 without interfering with the hook portion 42.

Meanwhile, while the optical disk drive is operated as described above, in order to unload the disk D, the spindle motor 22 is stopped and a separate loading motor must be operated. By the operation of the loading motor, the pick-up base 20 is lowered on the front end relative to the rear end thereof. That is, starting from the state of FIG. 3, when the tip of the pick-up base 20 descends, one side of the hook wing 36 of the clamp 30 descends downward along the inclined surface of the guide surface 45. 30 returns to the original position. As shown in FIG. 5, when the picking base 20 descends, the hook blade 36 contacts the guide surface 45 to start unclamping.

Next, another embodiment of the present invention will be described with reference to FIG. 6. For reference, in the present exemplary embodiment, reference numerals of the exemplary embodiment shown in FIG. 3 are provided for convenience and descriptions of the same components will be omitted.

As shown in the figure, in the present embodiment, the clamp 130 has the same center C as the clamp through hole 143. In addition, before the clamp 130 is seated on the turntable 124, the center T of the turntable 124 is spaced apart from the center C of the clamp 130 by a predetermined distance. In other words, the position of the clamp through hole 143 is formed to be relatively eccentric with respect to the turntable 124.

When the pickup base 120 rises in the above state, the clamp 130 is seated on the turntable 124. In this case, the center T of the turntable 124 coincides with the center C of the clamp 130.

Hereinafter, the operation of the disk drive employing another embodiment of the present invention having the configuration as described above will be described.

First, when the clamp 130 is loaded without the disk D while the hook portion 142 is engaged, and the pick-up base 120 is raised at the end of loading, the clamp 130 is mounted on the turntable 124. Is seated. That is, while the inclined surface of the insertion cone 126 is positioned in the cone seating groove 132 of the clamp 130, the inclined surface of the insertion cone 126 is in contact with the inclined surface of the cone seating groove 132 before the top surface of the insertion cone 126, Next, the clamp 130 is lifted in contact with the upper surface of the cone seating groove 132. In this case, the center of the clamp 130 and the center of the turntable 124 coincide with each other. In addition, the clamp 130 is attached to the turntable 124 by the magnetic force or the magnetic weight of the magnet (M).

In this state, the hook wing 136 of the clamp 130 is no longer supported by the hook portion 142. Accordingly, the clamp 130 may rotate integrally with the turntable 124 without interfering with the hook portion 142.

Meanwhile, while the optical disk drive is operated as described above, in order to unload the disk D, the spindle motor 122 is stopped and a separate loading motor must be operated. By the operation of the loading motor, the pick-up base 120 has its front end lowered based on its rear end. That is, starting in the above state, when the tip of the pickup base 120 is lowered, the tray is taken out, and the pickup base 120 is returned to its original position.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self-evident.

In the clamping apparatus of the optical disk drive according to the present invention as described in detail above, the following effects can be obtained.

In the present invention, when the clamp is seated on the turntable, the clamp is moved inclined by a predetermined distance so that the center of the clamp coincides with the center of the turntable. By doing so, the inclined surface of the insertion cone is positioned in the cone seating groove of the clamp, and thus comes into contact with the inclined surface of the cone seating groove before the upper surface of the inserting cone. The clamp is then lifted in contact with the top surface of the cone seating groove.

On the other hand, when the clamp is seated on the turntable while the center of the clamp coincides with the center of the clamp hole, and the center of the clamp hole and the center of the turntable are separated by a predetermined interval, the clamp is moved inclined by a predetermined distance while The center and the center of the turntable will coincide. In this way, the inclined surface of the insertion cone is positioned in the cone seating groove of the clamp while contacting the inclined surface of the cone seating groove rather than the top surface of the inserting cone. And the clamp is lifted in contact with the upper surface of the cone seating groove.

Therefore, in the present invention, since the upper surface of the clamp and the upper surface of the insertion cone are contacted along the inclined surface instead of directly contacting, noise generated when clamping can be reduced more efficiently.

Claims (3)

Clamps are selectively coupled to the turntable to fix the disks, and clamps are formed on the outer circumferential edges so that the hook wings are formed to protrude relatively. The clamp is provided with a clamp hole through which the clamp is located and comprises a hook portion for holding the hook wing of the clamp at the edge of the clamp hole, The clamp is supported by the hook portion spaced apart from the center of the clamp hole by a predetermined interval and when the clamp is seated on the turntable is configured so that the center of the clamp coincides with the center of the turntable. Clamping device. The method of claim 1, Clamping apparatus of the optical disk drive, characterized in that the guide surface is formed to be inclined upward in the centrifugal direction of the clamp through the one side of the bottom surface corresponding to the edge of the clamp through. Clamps are selectively coupled to the turntable to fix the disks, and clamps are formed on the outer circumferential edges so that the hook wings are formed to protrude relatively. The clamp is provided with a clamp hole through which the clamp is located and comprises a hook portion for holding the hook wing of the clamp at the edge of the clamp hole, The clamp is supported in the hook portion to match the center of the clamp hole and when the clamp is seated on the turntable, the center of the clamp hole and the center of the turntable is configured to be spaced apart by a predetermined interval Clamping device.

Images