JPH0442479A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To perform the loading/unloading of a magnetic head slider in an optional position on a magnetic disk by providing a specified head lift arm for moving a suspension in the vertical direction to the surface of the magnetic disk and a moving means for moving this head lift arm. CONSTITUTION:The device is provided with the head lift arms 8a and 8b for moving the suspensions 4a and 4b vertically to the surface of the magnetic disk 1 and the moving means 12 for moving these head lift arms 8a and 8b. Then, head lifters 7a and 7b are fitted via leaf springs 10a and 10b to a supporting base 11 in such a manner that the head lift arms 8a and 8b are positioned between the magnetic head sliders 3a and 3b and the magnetic disk 1, and the head lift arms 8a and 8b are parallel to the magnetic disk 1 and at some angle to the lengthwise direction of the suspensions 4a and 4b. By this method, the loading/unloading of the magnetic head sliders 3a and 3b are performed in an optional position on the magnetic disk 1.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a magnetic disk device that records and reproduces information by floating on a magnetic disk that rotates at an operating speed. In particular, the present invention relates to a magnetic disk drive equipped with a magnetic head slider loading/unloading mechanism.

(Prior Art) In a conventional magnetic disk drive, a magnetic head slider that floats above a magnetic disk based on the principle of a hydrodynamic gas bearing is used as a magnetic head.

This relative movement between the magnetic head slider and the magnetic disk forms an air film between them. As a result, the magnetic head slider is positioned at a position where the floating blade due to the air film between the magnetic disk and the head load due to the suspension carbon are equal.The magnetic disk and magnetic head slider maintain a small gap while maintaining the magnetic Recording and reproducing information from disks. Further, as a method for starting and stopping the magnetic head slider and the magnetic disk, a Puntakuto start-stop method (hereinafter abbreviated as 088 method) is generally adopted. According to this method, when the magnetic disk is stopped, the magnetic head slider and the magnetic disk are in contact with each other.

Therefore, if the rotational speed of the magnetic disk is below a certain level when the magnetic disk drive is started or stopped, the magnetic head slider and the magnetic disk are in a sliding state.

As mentioned above, in order to increase the capacity and density of a magnetic disk drive using a magnetic head slider that floats above a magnetic disk, the smaller the flying height of the magnetic head slider, the better.Currently, the flying height of the magnetic head slider is 0. A flying height of about 2 μm has been achieved. However, because it uses the C8S method, if the magnetic head slider and magnetic disk become attracted to moisture when the magnetic disk device is stopped, a problem arises in which, in the worst case, it becomes impossible to restart the device. ing. In general, to avoid this adhesion, grooves called texturing are provided on the surface of the magnetic disk. However, by performing this texturing, problems such as wear of the magnetic disk due to the sliding between the magnetic head slider and the magnetic disk when the magnetic head slider starts and stops, and wear of the magnetic disk occur. A problem arises in that the dust generated by this can trigger a head crash. Furthermore, with the recent spread of laptop computers and notebook-type combiators, magnetic disk drives are increasingly being installed in these devices. Therefore, there is an increasing demand for devices that have improved earthquake resistance when stopped, and for devices that can be started and stopped frequently to save power. In order to solve the above problem, at startup, the magnetic head slider is turned off after the rotational speed of the magnetic disk reaches the operating speed.
A magnetic disk drive is required that has a load/unload mechanism that applies a load to the magnetic head slider and releases the load on the slider before the magnetic disk and magnetic head slider come into contact with each other when the magnetic disk is stopped, thereby keeping the slider and disk out of contact. As this type of magnetic disk device, for example, Japanese Patent Laid-Open No. 63-1069
There are 74. This is to move the magnetic head slider to the outermost periphery of the magnetic disk when the rotational speed of the magnetic disk does not reach the operating speed due to a rod or the like. However, according to the above device, loading/unloading must be performed at the outermost periphery of the magnetic disk, and there is a problem in that loading/unloading takes time when starting and stopping are frequently performed. .

(Problems to be Solved by the Invention) As described above, in conventional magnetic disk devices, loading/unloading of the magnetic head slider cannot be performed at any position on the magnetic disk. The problem was that it took a long time.

The present invention has been made to solve the above-mentioned problems, and provides a magnetic disk device equipped with a loading/unloading mechanism that allows loading/unloading of a magnetic head slider at any position on a magnetic disk. The purpose is to

[Structure of the invention]

(Means for Solving Problem 11) In order to achieve the above-mentioned object, the magnetic disk device of the present invention records information on a rotating magnetic disk capable of recording information while maintaining a minute distance from the surface of the magnetic disk. a magnetic head slider to which a head for recording and reproducing is attached; an arm for guiding the magnetic head slider to a predetermined position on the magnetic disk; one end of the magnetic head slider and the other end serving as the arm; A magnetic disk drive comprising: a suspension that maintains a constant flying distance of the magnetic head slider from the surface of the magnetic disk; a head lift arm that moves the suspension in a direction perpendicular to the surface of the magnetic disk; and a moving means for moving the head lift arm.

The head lift arm is parallel to the magnetic disk and at an angle to the longitudinal direction of the suspension head.

(Function) According to the magnetic disk drive of the present invention having the above-described configuration, the suspension slider is moved in the vertical direction by the head lift arm, so that the magnetic head slider is linked to the suspension lever. can be loaded/unloaded at any position on the magnetic disk.

Furthermore, since the head lift arm has an angle with respect to the longitudinal direction of the suspension engine, the head lift arm can be moved faster and in conjunction with the suspension engine than when the head lift arm is attached in the longitudinal direction of the suspension engine. Loading/unloading of the magnetic head slider can always be kept parallel to the magnetic disk.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a magnetic disk device showing an embodiment of the present invention, and FIG. 2 is a side view of the magnetic disk device shown in FIG. 1 from direction C. Note that the shaded part in Figure 2 is a cross-sectional view taken along the H-Bl line in Figure 1, and the other parts are shown in Figure 1.
It is shown as a sectional view taken along the line A-AI in the figure. 1st
According to the figures and FIG. 2, a magnetic disk 1 is fixed to a hub 2 and rotated by a spindle motor (not shown).

The magnetic head sliders 3a, 3b are attached to actuator arms 6a, 6b on both sides of the magnetic disk l via suspension blades 4a, 4b. The head lifters 78, 7b are head lift arms sa*sb
The magnetic head slider is 3m long.

3b and the magnetic disk 10.
Support stand 11Kjl via 11, 10b! is attached. The cam 12 is attached to a rotational drive unit 13 (for example, a stepping motor), and is attached to a head lifter 751, 7.
Seal part 931.9b of b.

installed between. Figure 3 is B-81M in Figure 1 showing the positional relationship between the cam 12 and the shoulder parts 9a and 9b of the head lifters 78 and 7b when the magnetic head sliders 3a and 3b are unloaded in this embodiment. Fig. 4 is an enlarged sectional view taken along the line OA-AI in Fig. 1, showing the positional relationship between the head lift arms 8M, 8b and the suspension genes 4a, 4b in the case of Fig. 3. Also,
FIGS. 5 and 6 are the above-mentioned FIG. 3 and #!, respectively. It corresponds to Figure 4, and Figures 5 and 6 show the magnetic head slider 3.
3a and 3b show the positional relationship of each part during loading.

To explain using the above-mentioned drawings, when the magnetic disk 1 is stopped, the cam 12 is in the state shown in FIG. 3, and is pushing the head lifters 78, 7b apart. Therefore, the head lift arm 8a8b holds the magnetic head sliders 3a, 3b at a position away from the magnetic disk 1 by lifting the suspension arms 451, 4b as shown in FIG. Therefore, when starting up the magnetic disk drive which has been stopped as shown in FIG. After this, the cam 12 is brought into the state shown in FIG. This causes the head lift arm 6a.

8b is Susbengene 4m as shown in Figure 6.

4b, the magnetic head sliders 3a and 3b are positioned at positions where the load from the suspension blades 4a and 4b and the floating blade are balanced. When the magnetic disk device is stopped, the cam 12 is moved from the state shown in FIG. 5 to the state 114 shown in FIG. After separating from the disk 1, the rotation of the magnetic disk 1 is stopped. As a result, magnetic head slider = 3maro, 3b and magnetic disk 1
can be kept contactless at all times. Therefore, the magnetic head sliders 3a, 3b and the magnetic disk 1 are not worn out, so it is possible to suppress the occurrence of head crashes caused by dust caused by the wear.

Also, since the magnetic head sliders 3m and 3b do not come into contact with the magnetic disk 1 even when stopped, the magnetic head slider 3
A means to avoid adsorption of a and 3b becomes unnecessary.

By the way, the magnetic head slider 3a in FIG.
The distance between the magnetic disk 3b and the magnetic disk 10 is very small, about 0.2 μm. Therefore, magnetic head slider-3M,
In order to load/unload the magnetic head sliders 3a and 3b without contacting the magnetic disk 1, careful attention must be paid to the speed at which the magnetic head sliders 3a and 3b are brought close to and separated from the magnetic disk IK and the posture of the magnetic head sliders 3a and 3b. You need to be careful. In other words, the head lifter is 7m.

7b is Susavenji Shoun 4a, 4bwo! It is necessary to spread it out parallel to the surface of the air disk 10. 11. The magnetic head sliders 3M and 3b and the magnetic disk 1 were always kept parallel. The magnetic head sliders 3a and 3b must be moved perpendicularly to the magnetic disk 1. Further, as shown in FIG. 7, the load is set so that the speed at which the magnetic head slider 3 approaches and leaves the magnetic disk 1 smoothly increases and decreases near the operating position of the magnetic head slider 3. /Unloading is desirable. However, in the case of the present invention, the head lift arms ga and gb are suspension lift arms 4a.

4b in the longitudinal direction (approximately 90 degrees in this example)
°). For this reason, A in Figure 1
-By installing the head lift arms sa and sb on the A' striped line, it is possible to more reliably move the head lift arms sa and sb while keeping the head lift arms parallel to the surface of the magnetic disk 1. Further, by optimizing the shape of the cam 12, speed control as shown in FIG. 7 can be easily performed.

Since the speed can be controlled by the shape of the tab cam 12,
Electrical control of the rotation drive unit 13 can be simplified.

In addition, in the embodiment described above, the paddle lifter 71,
A cam 12 is used as a means for driving the magnetic disk 7b, and loading/unloading is performed by rotating the cam 12. However, a member having the same shape as the cam 12 is moved parallel to the magnetic disk 1. , head lift arm 9a
, gb can also be inserted into the cylinder parts 9a, 9b to achieve the same effect. In another embodiment, the head lifter 71.7b is connected to the leaf spring 10a.
, 10b may be omitted and may be movably installed on the support stand 11 via a sliding surface. In addition, the head lift arm 8a
, 8b, even if the magnetic head sliders 3m, 3b receive a shock when they are near the hub, the magnetic head sliders 3a, 3b can be removed from the head lift arms ○a, 8b. This prevents it from falling off and improves earthquake resistance.

〔Effect of the invention〕

As detailed above, according to the magnetic disk device of the present invention, the magnetic head slider can be moved at any position on the magnetic disk parallel to the surface of the magnetic disk and so that the magnetic disk and the magnetic head do not come into contact with each other. - Can be loaded/unloaded.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of an embodiment of the magnetic disk device of the present invention, and FIG. 2 is a side view of the magnetic disk device shown in FIG. ...Magnetic disk a, 3b...Magnetic head slider a, 4b-...Suspension ring a, 6b River actuator arm a, 8b...Head lift arm 2...Cam (moving means) 3...Rotation drive unit (moving means) Agent Patent attorney Noriyuki Chika Figure B→-- ---HF-B' Figure B-←--- 1+t-B Figure figure

Claims (2)

[Claims] (1) A magnetic head slider equipped with a head that records and reproduces information on the magnetic disk while maintaining a minute distance from the surface of a rotating magnetic disk capable of recording information; In a magnetic disk drive having an arm that guides the disk to a predetermined position, and a suspension that maintains a constant flying distance of the magnetic head slider from the surface of the magnetic disk, with the magnetic head slider as one end and the arm as the other end. , a head lift arm for moving the suspension in a direction perpendicular to the surface of the magnetic disk, and a moving means for moving the head lift arm, wherein the head lift arm is parallel to the magnetic disk and in a direction perpendicular to the surface of the magnetic disk. A magnetic disk device characterized in that it has an angle with respect to the longitudinal direction of the magnetic disk device. (2) The magnetic disk device according to claim 1, wherein the head lift arm has a length equal to a distance that the magnetic head slider moves in the radial direction of the magnetic disk.