KR100422427B1 - Suspension of hard disk drive using dynamic head loading method - Google Patents

Abstract

PURPOSE: A suspension of a hard disk drive using a dynamic head loading method is provided to form an extension portion which performs a lift rod function, thereby realizing high reliability and reducing the number of components as improving an assembling efficiency. CONSTITUTION: An extension portion(1) functioning as a lift rod is extended toward a front end of a suspension(12) in longitudinal direction, to replace an existing lift rod. The suspension(12) is formed in triangular flat board type. A magnetic head for reading/writing information from a disk is attached to the front end of the suspension(12). Another suspension(12) is installed on an actuator arm to load a lower surface of the disk.

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 reducing the flying height of the head, namely the flying height. As part of that effort, the universal contact head parking method (also known as "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 the CSS type drive isolates the pad 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.

Stiction phenomenon means that both the air bearing surface of the head slider (so-called ABS (Air Bearing Surface)) and the surface of the disk become too smooth, especially due to the long contact between the air bearing surface and the disk, It does not fall.

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 extremely difficult to select the right combination of pad and disc 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, a technology provided by U.S. Patent No. 5,289,325 as an embodiment of a hard disk drive using a dynamic head loading system basically includes a lift rod (13) projected out of a suspension 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, And a head attached to a single side of the line of the disk 12 is loaded onto an air bearing on the disk 20.

As shown in FIG. 2, at this time, the method in which the lift rod 13 is attached to one side of the tip of the suspension 12 is a structure that is attached by bonding treatment using an epoxy resin.

The above method ensures the 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)

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.

Another object of the present invention is to provide a suspension of a hard disk drive having improved productivity due to reduction of assembling parts.

In order to accomplish the above object, one embodiment according to the technical idea of the present invention is a suspension of a hard disk drive using a dynamic head loading method, wherein one side of the suspension 12, And an extension part (1) extending toward the longitudinal direction end of the suspension in a semicircular shape is integrally formed.

FIG. 1 is a plan view schematically showing an installation state of a suspension of a hard disk drive using a dynamic head loading scheme according to an embodiment of the present invention.

2 is a perspective view showing a suspension of a hard disk drive according to an embodiment of the present invention.

3 is a perspective view showing a suspension of a hard disk drive according to a preferred embodiment of the present invention.

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

Description of the Related Art

1: Extension part 12: Suspension

20: Disc

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.

3 and 4, a configuration of a hard disk drive using the dynamic head loading method according to the present invention will be described. A hard disk drive includes a disk 20 for forming a magnetic coating layer to record or reproduce 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 formed by integrally bending an extension part 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 longitudinal direction end 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. At this time, the free end of the extension part 1 is connected to the actuator arm (not shown) so that the cam 16 mounted on the base plate and the other operation are engaged with another suspension 12 11).

In view of the configuration of the cam assembly 15 that performs a sliding operation with the extended portion, the height of the cam 16 is made as small as possible (the height of the heads does not touch each other) A cam surface 16a is formed on the upper and lower sides of the extension portion so as to slide when loading / unloading the extension portion so that the driving force of the head when the head is flying over the disc 20, Make sure the action is done.

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.

4, when a cam assembly 15 device is installed on the base plate and a loading or unloading command is issued from the control system, the solenoid (not shown) is turned on and the cam surface 16a is turned on, Of the extension portion 1 of the suspension arm 12 of the actuator arm 11 is positioned parallel to the surface of the disk 20 and the cam surface 16a is held at a position parallel to the surface of the disk 20, To move to the latch position or the surface of the disk 20 on the cam surface 16a. When the loading or unloading is completed, the solenoid is turned off. At this time, due to the force of the torsion spring installed on the rear portion of the cam, the cam 16 rotates 90 degrees, The negative free end is fully locked between the disc and the cam and the head 14 is parked in the opened form.

As a result, the technical idea of the present invention is implemented to improve assemblability and reliability by manufacturing a separate part called a lift rod by integrally bending it.

INDUSTRIAL APPLICABILITY As described above, the present invention is effective in providing a highly reliable product that eliminates the possibility of contamination caused by bonding, reduces manufacturing cost by reducing the number of parts, improves the assemblability, and the like. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (1)

In a suspension of a hard disk drive using a dynamic head loading method, (1) extending toward the longitudinal direction end of the suspension is integrally formed so that one side of the suspension (12) located on the opposite side of the disk is directed upward and bent in a semicircular shape so as to serve as a lift rod. Suspension of hard disk drive using head loading method.