KR19980015951A - Hard disk drive slip-resistant clamp device - Google Patents

Abstract

1. Technical field to which the invention described in the claims belongs

The present invention relates to a clamp device for preventing slip of a hard disk drive.

2. Technical Challenges to be Solved by the Invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a clamp device for preventing slippage by minimizing impact or vibration to prevent disk slip and high reliability.

3. The point of the solution of the invention

The present invention is characterized in that an inclined surface is formed on an upper central surface of a spindle motor contacting a clamp for maximizing a clamping force of a disk, and a corner portion is formed in a clamp which abuts against the inclined surface to minimize disk slip.

4. Important Uses of the Invention

INDUSTRIAL APPLICABILITY The present invention is effective in suppressing disk slip during operation of a hard disk drive, and thus provides a highly reliable hard disk drive.

Description

Hard disk drive slip-resistant clamp device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a clamping device for a hard disk drive, and more particularly, to a clamping device for preventing slipping of a disk by maximizing frictional force when a hard disk drive is impacted.

Hard disk drives are generally an important part of computers as an auxiliary storage device. Moreover, under the modern multimedia environment, it is inevitable to increase the capacity through the high density recording of the hard disk drive. Therefore, the drive industry is expected to advance the new head and the media and develop more innovative technology, Competition is fierce.

The hard disk drive is a mechatronics product composed of an electronic device and a mechanical device. The hard disk drive is a mechatronics product, which transmits a digital signal to a head serving as an electromagnet and records it on a disk having magnetization properties, It is one.

1, a hard disk drive typically includes a base 20 as a base of all components, a magnetic head 22 for inputting / outputting, and a magnetic head 22 A plurality of disks 40 for storing information from the magnetic material; a spindle motor 60 for rotating the disk 40 at a constant peripheral speed; And a cover and a gasket which serve as a seal by blocking the component from the outside.

The actuator 24 is provided at one end thereof with a magnetic sensor for recording or reading data recorded on a track of a disk 40 rotated at a high speed by a spindle motor 60, A head 22 is provided. The magnetic head 22 is fixed to an arm 28 by a suspension 26.

A pivot shaft (36: a pivot screw and a pivot bearing), which is a rotation center of the actuator 24, is provided at a central portion of the actuator 24.

A voice coil 42 wound on the other side of the actuator 24 for moving the actuator 24 to a parking zone 34 and a data zone 32 is wound on a plastic bobbin 44: bobbin, and the end piece of the bobbin 44 is provided with an iron piece 45.

When the drive is turned on, the spindle motor 60 rotates at a constant peripheral speed, so that the disk 40 fixed to the spindle motor 60 is also rotated Speed rotation. Subsequently, when the disk 40 rotates at a high speed, the magnetic head 22 floats at a constant height due to the pressure of the air film formed on the surface of the disk. In this state, the head 22 moves to the track position on the disk, and the drive sends a signal to the host computer that the disk drive is ready to execute the command via the interface.

When the read / write information is input in the state where the drive is ready for operation, the actuator 24 rotates about the pivot shaft 36 in accordance with the position and speed signal of the control circuit, Write head 22 is moved to a desired position (constant track) on the disk. Thereafter, the read / write circuit 22 causes the head 22 to perform a read / write operation. At this time, the position and speed of the magnetic head 22 are controlled by the control circuit section during the read / write operation.

2, the hub of the spindle motor 60 fastened to the base 20 by a fastener 80 or an addhesive is provided with a plurality of disks (not shown) 40: Installs a lot as the memory capacity is high). A clamp 30 is provided at the top of the disks 40 and a plurality of screws or fasteners are fastened to the spindle motor to fix the disk. A spacer 50 is provided between the plurality of discs to maintain a gap and fix the disc due to friction with the contact surface.

However, as the hard disk drive becomes denser, it is more susceptible to vibration and impact, and after the shock is applied, the disk slip has a serious effect on the performance of the product. Therefore, the conventional small-sized hard disk drives (1.8 ', 2.5) have the problem that disk slip occurs because the disk is fixed using only one screw. That is, disk slip is more likely to occur than a 3.5 'disk.

In the case of a hard disc drive having a plurality of discs, the disc between the motor surface and the spacer is not brought into contact with the mirror surface and the mirror surface. However, the disc engaged with the uppermost clamp Slip may occur. The reason for this is as follows. As shown in Fig. 2, the disk is fixed by inserting the screw into the hole at the center of the clamp and then engaging with the female screw formed in the motor to fix the disk. However, the diameter of the screw inserted into the clamp hole Because there is a size difference d1 between the two parts. Therefore, when a shock is applied, the force for preventing the disk from slipping at the top is obtained by the frictional force f1 of the opposite surface (the surface abutting the spacer) of the surface abutting the clamp and the frictional force f2 of the surface abutting the screw and the clamp, And the frictional force f3 generated by abutting the disk is present. At this time, since the flatness of the screw surface in which the clamp and the screw are in contact is not as good as the spacer surface or the clamp surface, the frictional force of the screw- small.

In such a situation, if there is an impact in the end, the force to prevent slipping of the top disk exists only in the frictional force of the surface contacting the spacer and the frictional force of the surface of the screw and the clamp. Therefore, the disk located at the top of the disk occurs at a smaller impact than the disk located below, and the amount of slip is the difference in the size of the screw diameter inserted into the clamp hole and the clamp hole.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clamp device for preventing slip of a hard disk drive with minimized shock or vibration.

Another object of the present invention is to provide a clamp device for preventing slip of a highly reliable hard disk drive.

According to an aspect of the present invention, there is provided a spindle motor comprising: an upper central surface of a spindle motor abutting a clamp for maximizing a clamping force of a disk; So as to minimize disc slip.

1 is a perspective view showing a configuration of a conventional hard disk drive

FIG. 2 is a cross-sectional view showing a state where a clamp is installed on a spindle motor of a hard disk drive according to a conventional example

3 is a cross-sectional view showing a top portion of a spindle motor according to a preferred embodiment of the present invention

FIG. 4A is a plan view showing a clamp for preventing slip, according to an embodiment of the present invention, and FIG. 4B is a cross-

5 is a cross-sectional view illustrating a state in which a clamp is installed on a spindle motor of a hard disk drive according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

1: slope 2: clamp

2a: Clamp 10: Cover

40: Disk 60: Spindle motor

70: Screw

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the drawings, the same reference numerals are given to the same components as much as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the clamping apparatus of the present invention, the disc assembly is assembled by assembling the disc to the spindle motor sequentially, then assembling the spacer, and finally tightening the clamp with a screw. That is, the assembling procedure is the same.

3, 4A and 4B, the clamp device according to the most preferred embodiment of the present invention has a gist of the present invention in a top surface of a spindle motor in which a clamp is engaged with a clamp and a spindle motor in which the clamp is engaged. More specifically, the inclined surface 1 is formed on the upper surface of the spindle motor contacting the clamp for maximizing the clamping force of the disk. The inclined surface (1) is inclined toward the center.

Further, the edge portion 2a is formed in the clamp 2 abutting the inclined surface 1 to maximize the mutual frictional force. The edge portion (2a) is formed so as to protrude downward, and a size of the diameter is determined within a range in which the spindle motor can be brought into contact with the inclined surface when assembled with the spindle motor. The frictional force is increased by making contact with the inclined surface 1 by the outer circumferential length of the corner portion 2a. Since the corner portion 2a is in strong contact with the inclined surface 1, the frictional force due to the contact is maximized.

5, when the disc 40 is rotated in accordance with the rotation of the spindle motor 60 by assembling the two parts to complete the assembly, the inclined surface 1 and the corner portion 2a are rotated, The disk slip of the disk can be minimized.

As described above, the present invention is effective in suppressing disk slip during operation of the hard disk drive. While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (2)

In a clamping device for a hard disk drive, An inclined surface 1 is formed on the upper central surface of the spindle motor 60 which contacts the clamp for maximizing the clamping force of the disk and a corner portion 2a is formed on the clamp 2 abutting against the inclined surface 1, Wherein the clamping device comprises a clamping device for clamping the slip prevention device of the hard disk drive. The clamp device for a slip prevention of a hard disk drive according to claim 1, wherein the inclined surface (1) is inclined toward the center.