KR100412057B1 - Suspension for hard disk drive using dynamic head loading - Google Patents

Abstract

PURPOSE: A suspension of an HDD(Hard Disk Drive) using a dynamic head loading system is provided to form an extension portion for performing a lift rod function in integrated type, thereby supplying the suspension with high reliability. CONSTITUTION: An extension portion(1) functions as a lift rod. The extension portion(1) is extended toward a front end of a suspension(12) to be configured in dual gimbal type. A dimple-type projection is protruded from a free end lower side of the extension portion(1) such that the dimple-type projection can slide on a cam surface(16a). The extension portion(1) forms a triangular-shaped tension hole(2) inside. A disk(20) is firmly fixed to a hub of a spindle motor in vertical direction.

Description

SUSPENSION FOR HARD DISK DRIVE USING DYNAMIC HEAD LOADING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk drive (HDD) using a dynamic head loading (DHL) method, and more particularly, to perform a lift rod function integrally with a suspension in which a magnetic head of a hard disk drive is installed. It relates to a suspension using a head loading method.

As a secondary record storage device, a hard disk drive is an important element of a computer. Moreover, in modern multimedia environments, high capacity is inevitable through high-density recording of hard disk drives, and accordingly, the drive industry is trying to preempt any high ground for coping with high capacity through the development of new heads and media as well as more innovative technology. The competition is fierce.

Higher capacities through high-density recording of hard disk drives can be most effectively achieved by lowering the head's flying altitude, or flying height, and as part of that effort, a universal contact head parking scheme (aka "CSS"). A non-contact head parking method ("DHL": dynamic head loading) drive has been introduced in recent years as opposed to a contact start stop.

The most distinctive feature of the DHL type drive is that the CSS type drive distinguishes the head from the disk in the air, unlike the CSS type drive, which parks the head directly into the parking zone on the disk. It is hanging and parked.

As a result, many unique features of the DHL method are followed, and one of them is fundamentally blocked from the problem of stiction, which is one of the disadvantages of the CSS drive.

Stiction is the difference between the air bearing surface and the disk due to prolonged contact between the air bearing surface and the disk, where both the air bearing surface (aka ABS: Air Bearing Surface) and the disk surface of the head slider are too smooth. It is not stuck.

These stiction problems can cause catastrophic failures in the operation of the drive or have a serious impact on the reliability of drive quality at the development or manufacturing stage, and even more so at abnormal temperatures and humidity. Selecting the right combination of heads and discs to avoid the possibility of their occurrence can be shortened, but this requires extreme caution, but it is extremely difficult and can be developed despite the high manpower and time spent in the drive development stage. The economic loss is enormous due to the delay.

Considering this, the DHL method is very attractive to the drive industry. Looking at the features other than the above, there is no need for a separate parking area on the disk, thereby increasing the data area and consequently increasing the capacity of the drive, and furthermore, no texturing is required to reduce the stiction in CSS type drives. It has the advantage of using Polished Disk.

The use of polished discs means that the gliding height is lowered, so that at least the flying head can have a minimum flight altitude, which is advantageous for high density and high capacity.

As shown in FIG. 1, the technology provided by US Patent No. 5,289,325 as an example of a hard disk drive using a dynamic head loading method basically includes a lift rod 13 protruding out of a suspension 12. The suspension is caused by forcibly sliding down the very gently inclined cam surface 16a of the cam 16 by the voice coil motor of the actuator 10 at the parking position on the cam 16 fixed to the base. The head 14 attached to one side of the tip of 12 is designed to be loaded onto an air bearing on the disk 20.

At this time, the lift rod 13 is attached to one side of the front end portion of the suspension 12 is a structure that is attached by performing a bonding process using an epoxy resin.

The above method ensures the accuracy and reliability of the dynamic head loading in the hard disk drive, depending on how accurately the lift rod is bonded to the suspension (e.g. within + 0.002mm tolerance range in the X, Y and Z directions). do). Moreover, hard disk drives, which are computer auxiliary storage devices, are high reliability products in which the assembly environment is assembled at an air cleanness class of 100 or less.

Since the hard disk drive uses a floating head while maintaining a very low flying height on a recording medium that rotates at high speed for information recording or reproducing, the head and the recording medium may be formed by extremely small dust. Liver scratches or crashes can occur, resulting in data loss, one of the product's fatal defects, and making data recording and playback impossible.

Therefore, in the assembling process of the hard disk drive, the apparatus of the hard disk drive is first washed before assembling, and the semi-assembly is also cleaned and reassembled if necessary. In addition, in order to minimize dust generation in the assembly process, the material of the screw used for the coupling between the instruments is made of stainless steel, or dust generated by wear between the metals after screw assembly is clean air. Considerable attention is paid to the process, such as blowing it with air or wiping off the dust with a cotton swab moistened with a cleaning solution if necessary.

However, as is apparent from the above-described schematic description of the prior art, problems arise in the supply of raw materials in operation, in the process of using the raw materials, and in securing the reliability of the products. In addition, when the lift rod is bonded to the distal end of the suspension with epoxy resin, the disk rotates at a high speed by the spindle motor, resulting in high temperature, resulting in outgassing, which affects the reliability of the product. do.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to form an extension that functions as a lift rod integrally to the lift rod attached to the front end of the suspension to escape the technique of using epoxy resin It is to provide suspension of hard disk drive with high reliability.

In order to achieve the above object, according to an embodiment of the present invention, in the suspension of a hard disk drive using a dynamic head loading method,

An extension portion 1 serving as a lift rod extends toward the distal end of the suspension and is configured as a double gimbal type, and is dimpled so that sliding movement with the cam surface 16a is possible under the oil end of the extension portion 1. The mold protrusion 1a is protruded.

1 is a plan view illustrating an operating state of a suspension of a hard disk drive using a dynamic head loading method according to an exemplary embodiment.

2 is a plan view showing a suspension according to a conventional embodiment

3 is a plan view illustrating an operating state of a suspension of a hard disk drive using a dynamic head loading method according to an exemplary embodiment of the present invention.

4 is a plan view illustrating a suspension according to an embodiment of the present invention.

5 is a side cross-sectional view showing a portion of a suspension according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawing

1: Extension of double gimbal type. 1a: Dimple projection.

2: triangle hole. 10: Actuator.

12: Suspension. 14: Head or slider.

15: Cam assembly. 16: cam.

16a: cam surface. 20: disk

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. First, in describing each of the drawings, the same reference numerals indicate the same components.

As shown in Figures 3 and 4, the configuration of the hard disk drive using the dynamic head loading method according to the present invention, the hard disk drive is a disk 20 for forming a magnetic coating layer for recording or reproducing digital information Is provided, the disk 20 is rotated firmly fixed in the vertical direction in the clump to the hub of the spindle motor (not shown) to be rotated at high speed.

The hard disk drive also has an actuator 10 that rotates about a pivot axis, the actuator 10 having a voice coil motor (not shown) which is a combination of a technically well-known voice coil and a permanent magnet. It is rotated by, the actuator suspension 12 is formed integrally with the extension portion 1 of the suspension that serves as a lift rod. Thus, the type of suspension is a full length type.

The extension 1 serving as the lift rod extends toward the distal end of the suspension 12 to replace the existing lift rod. The suspension 12 is formed in a triangular flat plate shape, and a magnetic head 18 is attached to the front end of the suspension 12 to read / write information from the disk 20. In addition, the extension part 1 of the suspension 12 forms a triangular tension hole 2 therein to assist the existing lift rod.

In addition, as shown in FIG. 5, the dimple-shaped protrusion 1a protrudes below the distal end of the extension part 1, where the free end of the extension part 1 is cam 16 mounted to the base plate. Another suspension 12 is installed on the actuator arm 11 so that the associated operation loads the back side (bottom side) of the disc 20.

In the configuration of the cam assembly 15, the height of the cam 16 is smaller than the surface of the disk 20 as much as possible (to the height of the head does not touch each other), the projection 1a of the extension is loaded Cam face 16a is formed on the upper and lower sides so as to slide during unloading so that the head 14 is loaded and unloaded with a level driving force and a control means as if the head 14 is flying over the disk 20.

Referring to the operation of the suspension of the hard disk drive using the dynamic head loading method according to the present invention configured as described above are as follows.

If a loading or unloading command is issued from the control system by installing the cam assembly 15 device on the base plate, the solenoid (not shown) is turned on so that the cam face 16a is parallel to the disc 20 face. And the cam surface 16a is maintained in a position parallel to the disk 20 surface, the free end of the extension 1 of the suspension 12 of the actuator arm 11 latches on the cam surface 16a. (24) position or disk 20 side. In addition, when loading or unloading is completed, the solenoid is turned off. At this time, the cam 16 is rotated by 90 ° due to the force of the torsion spring installed at the rear of the cam. The free end 20 of the extension is fully locked in between and the head 14 is parked in an open manner.

As described above, the present invention is a hard disk drive using a dynamic head loading method, by removing a component called a lift rod, integrally extending the extension portion at the front end of the suspension and at the same time forming a dimple protrusion, work process To prevent defects in the process using the raw materials and raw materials and ensure high reliability. Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention.

Claims (2)

In suspension of a hard disk drive using a dynamic head loading method, An extension part 1 serving as a lift rod extends toward the tip end direction of the suspension 12 to form a double gimbal type, and a sliding movement with the cam surface 16a moves below the free end of the extension part 1. Suspension of a hard disk drive using a dynamic head loading method, characterized by protruding a dimple-like protrusion (1a) to enable each other. The suspension of a hard disk drive using a dynamic head loading method according to claim 1, wherein the extension part (1) has a triangular tension hole (2) formed therein.