KR980011324A - Suspension of hard disk drive using dynamic head loading - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension of a hard disk drive (HDD) using a dynamic head loading (DHL) method and a suspension of a highly reliable hard disk drive. The present invention is configured to extend an extension portion serving as a lift rod toward the front end side of the suspension.

Representative figure: Third figure

Description

Suspension of 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 a dynamic disk drive To a suspension using a head loading method.

As an auxiliary storage device, a hard disk drive is an important component of a computer. 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.

High capacity through high density recording of the hard disk drive can be achieved most effectively by lowering the flying height of the head, namely the flying height. As part of such efforts, a universal contact head parking method (also called "CSS" : Contact Start Stop), the drive of non-contact head parking method (aka "DHL": Dynamic Head Loading) has emerged in recent years.

The DHL type drive is distinguished from the CSS type drive most notably by the fact that a CSS type drive isolates the head from the disk and parks the head directly on the disk in a parking zone, It is parked hanging.

Accordingly, various unique features of the DHL method are followed. One of them is that the problem of stiction phenomenon, which is one of the disadvantages that the CSS type drive frequently has, is fundamentally blocked.

The stiction phenomenon is a phenomenon in which both the air bearing surface of the head slider (so-called ABS) and the surface of the disk become too smooth, especially due to the long contact between the air bearing surface and the disk, And not fall off.

This stiction problem has a serious effect on the operation of the drive, which may cause a serious obstacle to the operation of the drive or affect the reliability of the drive quality in the development or manufacturing production stage. Moreover, in the abnormal temperature and humidity, It is very difficult to select the right combination of head and disk to avoid the possibility of occurrence, but it is very difficult and it is difficult to develop even though it consumes a lot of manpower and time in the development stage of the drive The economic loss is huge due to the delay.

Considering this point, the DHL method is quite attractive to the drive industry. As described above, since no parking area is separately required on the disk, the data area can be increased and the capacity of the drive can be increased. Furthermore, there is no need of texturing to reduce stiction in the CSS type drive It has the advantage of being able to use a polished disk.

The use of the polished disk means that the gliding height is lowered and at least the flying height can be at least at the flying head, which is advantageous for high density and high capacity.

As shown in FIG. 1, as a practical example of a hard disk drive using a dynamic head loading system, a technology provided by U.S. Patent No. 5,289,325 basically includes a lift rod 13 protruding out of a suspension 12, A very gently inclined cam surface 16a of the cam 16 is forcibly slid down 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 the single side of the line of the suspension 12 is configured to be loaded onto the air bearing on the disk 20. [

At this time, the method in which the lift rod 13 is attached to one side of the front end of the suspension 12 is a structure in which bonding is performed by using an epoxy resin.

The above method ensures accuracy and reliability of dynamic head loading in the hard disk drive depending on how precisely the lift rod is bonded to the suspension (for example, the tolerance range in the X, Y and Z directions should be within + 0.002 mm do). Moreover, a hard disk drive, which is a computer-assisted storage device, is a highly reliable product in which the assembly environment is assembled at an air cleanliness class of 100 or less.

Since the hard disk drive uses a head floating at a very low flying height on a recording medium rotating at high speed for information recording or reproducing, Scratching or crashing can result in data loss, one of the deadly defects of the product, and data recording and playback becomes impossible.

Therefore, when looking at the assembling process of the hard disk drive, firstly clean the hardware components of the hard disk drive before assembling, and if necessary, assemble the assemblies after assembly. In order to minimize the generation of dust in the assembling process, stainless steel is used as the material of the screws used for joining the structures, and dust generated by the abrasion between metals after the screw assembly is clean air, Or if necessary, wipes off dust generated by a cotton swab with cleaning solution.

However, as is apparent from the above-described schematic description of the prior art, problems arise in the supply of raw materials at work, the failure of processes using raw materials, and the reliability of products. In addition, when the lift rod is bonded to the tip of the suspension with an epoxy resin, the disk rotates at a high speed by the spindle motor, resulting in a high temperature, causing outgassing, thereby affecting the reliability of the product. I am crazy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lift rod which is attached to a tip end of a suspension and which has an extension part functioning as a lift rod by removing a technique using an epoxy resin, Thereby providing a suspension of a highly reliable hard disk drive.

According to an aspect of the present invention, there is provided a suspension of a hard disk drive using a dynamic head loading method, wherein an extension portion serving as a lift rod extends toward the tip of the suspension do.

FIG. 1 is a plan view showing an operation state of a suspension of a hard disk drive using a dynamic head loading method according to a conventional example.

FIG. 2 is a plan view of a suspension according to an embodiment of the present invention; FIG.

FIG. 3 is a plan view showing an operation state of a suspension of a hard disk drive using a dynamic head loading method according to a preferred embodiment of the present invention; FIG.

FIG. 4 is a plan view showing a suspension according to an embodiment of the present invention; FIG.

FIG. 5 is a side sectional view showing a part of a suspension according to an embodiment of the present invention; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

1: extension part of double gimbal type 1a: dimple type projection

2: Triangular hole 10: Actuator

12: Suspension 14: head or slider.

15: cam assembly 16: cam

16a: cam surface 20: disk

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, in describing each drawing, like reference numerals designate like elements.

As shown in FIGS. 3 and 4, the structure of the hard disk drive using the dynamic head loading scheme according to the present invention will be described. The hard disk drive includes a disk 20 for forming a magnetic coating layer for recording or reproducing digital information The disk 20 is fixed to a hub of a spindle motor (not shown in the figure) which is rotated at a high speed in a vertical direction with a clump and is rotated.

The hard disk drive also includes an actuator 10 that rotates about a pivot axis, the actuator 10 being coupled to a voice coil motor (not shown) comprising a combination of a voice coil and a permanent magnet, And the actuator suspension 12 is integrally formed with an extension 1 of a suspension serving as a lift rod. Therefore, the type of the suspension is a full length type.

The extension portion 1 serving as the lift rod is extended toward the front end side of the suspension 12 to replace the existing lift rod. The suspension 12 is formed in a triangular plate shape and a magnetic head 18 for reading / writing information from / on the disk 20 is attached to the tip of the suspension 12. In addition, a triangular tension hole 2 is formed in the extension part 1 of the suspension 12 to assist the existing lift rod.

5, the dimple-like protrusion 1a is protruded at the tip load side of the extended portion 1, and at this time, the free end of the extended portion 1 is engaged with the cam 16 ) And its associated operation is mounted on the actuator arm 11 to load the rear surface (lower surface) of the disk 20 with another suspension 12.

The cam assembly 15 is configured such that the height of the cam 16 is smaller than that of the surface of the disk 20 so that the projections 1a of the extended portion are loaded A cam surface 16a is formed on upper and lower sides so as to slide upon unloading so that the driving force and the loading and unloading operation are performed by the driving force and the control means at a level when the head 14 is flying over the disc 20.

The operation of the suspension of the hard disk drive using the dynamic head loading method according to the present invention will now be described.

The solenoid (not shown) is turned on so that the cam surface 16a is parallel to the surface of the disc 20 when the cam assembly 15 is mounted on the base plate and the loading or unloading instruction is issued from the control system And the free end of the extended portion 1 of the suspension 12 of the actuator arm 11 abuts against the cam surface 16a while holding the cam surface 16a in a position parallel to the surface of the disk 20, When the loading or unloading is completed, the solenoid is turned off, and at this time, due to the force of the torsion spring installed on the rear portion of the cam, The free end 20 of the extension of the suspension 19 is completely locked and the head 14 is parked in the opened form.

As described above, according to the present invention, in a hard disk drive using a dynamic head loading method, a component such as a lift rod is removed, an extension is extended to the tip of a suspension integrally, and a dimple- To ensure process reliability and high reliability using raw materials and raw materials. While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.

Claims (3)

A suspension of a hard disk drive using a dynamic head loading system, wherein an extension part (1) serving as a lift rod extends toward a tip end of the suspension (12) and is formed as a double gimbals type hard disk drive Suspension of the drive. The suspension of a hard disk drive according to claim 1, wherein the extension part (1) has a triangular tension hole (2) formed therein. The dynamic head loading method according to claim 1 or 2, characterized in that the dimple-like projection (1a) is protruded so that the sliding movement with the cam surface (16a) The suspension of the hard disk drive using. ※ Note: It is disclosed by the contents of the first application.