JP2963565B2 - Adjustment method of mounting arm for magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting a mounting arm for a magnetic head, and more specifically, to an HDD.
The present invention relates to a method for adjusting the stress of a mounting arm for supporting a magnetic head used in a magnetic recording device such as a computer or a magnetic recording medium so that the magnetic head faces the magnetic recording medium.

[0002]

2. Description of the Related Art A floating type thin film magnetic head uses a dynamic pressure generated by the viscosity of air generated when moving at a high speed relative to a recording medium such as a magnetic disk, and makes a contact with a magnetic disk surface. A small flying height is generated, and is used for a read / write magnetic head such as an HDD.

In order to actually dispose the magnetic head in the magnetic recording apparatus, a magnetic head is mounted via a mounting arm 1 as shown in FIG. The mounting arm 1 is formed in a substantially T-shape as a whole. Specifically, the mounting arm 1 has an elongated flat and substantially trapezoidal arm main body 2 and a first bent portion 3 at the tip of the arm main body 2. Magnetic head mounting part 4
And a fixing plate 6 connected to the base end side of the arm body 2 via the second bent portion 5. Reinforcing plates 7 are provided on both side edges of the arm body 2 to prevent the arm body 2 from being twisted or bent more than necessary. Further, mounting holes 8,
8 are drilled. And the mounting arm 1 having the above configuration
Is manufactured by pressing a single metal plate having a thickness of about 0.3 to 0.5 mm.

FIG. 5 shows a state in which a magnetic head 9 is mounted in a magnetic recording apparatus using the mounting arm 1 having such a configuration. As shown in the figure, a magnetic head 9 is mounted on the lower surface of a magnetic head mounting portion 4 via a flat gimbal 10, and the mounting arm 1 is provided with mounting holes 8,
8 and is screwed to a movable table 12 in the magnetic recording apparatus. In this mounting state, the mounting arm 1 is bent at a predetermined angle at both bending portions 3 and 5, the magnetic head mounting portion 4 and the fixing plate 6 are arranged in a substantially horizontal state, and the arm body 2 is positioned at the tip. It is arranged so as to be inclined downward. As a result, the magnetic head 9 is cantilevered by the mounting arm 1 and is arranged to face the disk 13 as a recording medium.

[0005] At this time, the magnetic head 9 is urged downward by the spring pressure of the mounting arm 1 to be folded, and when the disk 13 rotates as described above, the magnetic head 9 is accordingly moved upward. A buoyancy is generated, and the buoyancy and the spring pressure are balanced, so that the magnetic head 9 flies a predetermined distance of about submicron.

[0006]

By the way, the attitude of the magnetic head 9 at the time of flying must be directly opposite to the disk 13 as shown in FIG. 6 (A). Becomes an obliquely inclined state as shown in FIG. Then, the distance between the read / write elements 14, 14 provided on the magnetic head 9 and the disk 13 varies, leading to a head crash or a reduction in the output level of the head, furthermore, writing cannot be performed reliably, and an error occurs during reading. May cause.

[0007] The cause of such inclination is that the thickness of the metal plate forming the mounting arm 1 is not constant. As a result, the thickness of the mounting arm 1 after the press forming is different at each part, This is because the stress (spring pressure) becomes non-uniform because, for example, a force is not applied uniformly when bent by processing.

Therefore, conventionally, when the tilt has occurred as described above, it is discarded as a defective product or once removed and bent or twisted by a human hand with respect to the mounting arm in a direction opposite to the tilt. , To eliminate the inclination. However, in the former case, the yield decreases and the cost increases. In the latter case, the force applied to the mounting arm requires a delicate amount of force, which is very complicated, and there is a problem that it takes a long time to learn such a technique.

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and an object of the present invention is to fix a magnetic head supported by a mounting arm when the magnetic head is tilted. It is an object of the present invention to provide a method for adjusting a mounting arm for a magnetic head, which can easily perform an operation of adjusting a stress applied to a magnetic head.

[0010]

In order to achieve the above-mentioned object, a method for adjusting a mounting arm for a magnetic head according to the present invention comprises an elongated substantially flat plate-shaped arm main body, and a first end provided on a tip of the arm main body. The magnetic head of the mounting arm, comprising: a magnetic head mounting portion continuously provided via the bent portion; and a fixed plate provided via a second bent portion on the base end side of the arm body. By mounting a predetermined magnetic head on the mounting portion and mounting the magnetic head at a predetermined position in the magnetic recording device via the fixing plate, the magnetic head is disposed so as to face a recording medium such as a magnetic disk. In order to correct the inclination, a through hole or a recess is formed at a predetermined position near at least one of the first and second bent portions to balance the stress of the mounting arm.

[0011]

The mounting arm once mounted with the magnetic head is temporarily fixed at a predetermined position in the magnetic recording apparatus, and the actual tilt state of the magnetic head is examined. Thereafter, the mounting arm is removed, and a through hole or a concave portion is provided at a predetermined position of the mounting arm according to the state of the inclination. That is, by forming the through hole, the stress around the relevant portion is reduced, and by forming the concave portion, the stress around the relevant portion is improved. Therefore,
By appropriately selecting the installation positions of these through holes, etc.,
It is easily adjusted to balance the stress, and the magnetic head is maintained in a desired posture.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method for adjusting a mounting arm for a magnetic head according to the present invention will be described below. Since the same mounting arm and the like as those used in the related art can be used, the same reference numerals are given and the detailed description is omitted. First, the mounting arm 1 as shown in FIG. 4 described above is manufactured by ordinary press working or the like.

Next, the magnetic head 9 is mounted via the gimbal 10 to the magnetic head mounting portion 4 provided at the tip of the mounting arm 1. There are roughly two types of attachments. That is, as shown in FIG. 1A, the two flying rails 16 provided on the slider 15 constituting the magnetic head 9 are moved in the direction perpendicular to the mounting arm 1, that is, the first and second bendings. As shown in FIG. 3B, the A type, which is arranged so as to extend in a direction parallel to the parts 3, 5, and the floating rails 16, 16 are arranged in the same direction as the mounting arm 1, that is, the first and the second. There is a B type which is disposed so as to extend in a direction orthogonal to the second bent portions 3 and 5.

Here, the first embodiment of the present invention will be described with reference to FIG.
A description will be given of an adjustment method for the A type according to the embodiment. First, as shown in FIG. 1A, the mounting arm 1 having the magnetic head 9 mounted on the tip thereof is temporarily fixed to the movable base 12 via the fixing plate 6 at the rear thereof. In this state, the inclination of the magnetic head 9 is checked. At this time, it is desirable to rotate a disk (not shown) as necessary to actually lift the magnetic head 9. In the case of the A type, as shown by a two-dot chain line in the figure, the first and second bent portions 3 and 5 are centered and bent more than necessary, or conversely, the bending is insufficient. As a result, the magnetic head 9 is often not supported horizontally, and in the case of such a phenomenon, an adverse effect occurs at the time of operating the magnetic head (reading / writing).

Therefore, according to the present invention, once the degree of inclination is checked, the temporary fixing is temporarily released, and the mounting arm 1 is removed from the movable base 12. Next, as shown in FIG. 8B or 8C, a through hole 18 is formed at a predetermined position in the vicinity of the first and second bent portions 3 and 5. That is, the reason why the inclination occurs is that the stress in each part on the mounting arm 1 is not balanced, and the stress tends to be generated near the bent portion. Therefore, by forming the through hole 18, the stress in the vicinity of the through hole 18 is reduced,
This balance is achieved. That is, by adjusting the number of through holes, etc., the magnetic head 9
Is adjusted to be horizontal. Then, when the adjustment work is completed, the mounting arm 1 is mounted on the movable base 12 again.

In this embodiment, the through holes 18 are provided on both sides of each of the bent portions 3 and 5, but in the present invention, the through holes 18 may be provided only on one side of the bent portions. Well, even better
Of the first or second bent portions 3 and 5, it may be formed only near one of the bent portions (only one of the patterns shown in FIGS. 3B and 3C). is there. Further, in place of the through hole, a concave portion (dent) (in any projecting direction) may be provided by a press or the like. In such a case, it is possible to increase the stress in the vicinity of the concave portion opposite to the through hole, and the through hole and the concave portion may be mixed and used as necessary, and various modifications are possible. is there. Further, as a method of forming the through holes and the concave portions, various means such as a laser beam may be used in addition to a punching process and a press process.

Next, an adjustment method for the B type according to the second embodiment of the present invention will be described with reference to FIG. In this embodiment, as in the first embodiment, the mounting arm 1 having the magnetic head 9 attached to the tip is temporarily fixed to the movable base 12 and the degree of tilt of the magnetic head 9 is checked. At this time, a disk (not shown) may be rotated as necessary. Next, the mounting arm 1 is detached from the movable base 12, and a through hole or the like is formed at a predetermined position on the mounting arm 1 according to the inclination.

Here, in this embodiment, unlike the above embodiment, the inclination direction is indicated by a two-dot chain line in FIG. In many cases, the magnetic head 9 is not supported horizontally when rotated by a predetermined angle, and in the case of such a phenomenon, an adverse effect occurs when the magnetic head is operated (read / write). Therefore, in order to suppress the rotation of the perforated portions such as the through holes 18 and the like, many through holes 18 and the like are formed on one side edge as shown in FIGS. The principle of operation of the through hole 18 and the like is the same as in the first embodiment, and a description thereof will be omitted. Also, in this embodiment, as in the above-described embodiment, it may be provided on both sides (the number of installations may be different), and it is needless to say that a concave portion may be provided instead of the through hole.

In the above-described embodiment, only the correction in the case where the magnetic head is tilted has been described as a measure for adjusting the mounting arm. However, the present invention is used to adjust the flying height of the magnetic head. You can also.

Furthermore, in each of the above-described embodiments, after the mounting arm is once removed, adjustment is performed by providing a through hole or the like. However, the present invention is not limited to this. May be adjusted.

[0021]

As described above, in the method for adjusting the mounting arm for the magnetic head according to the present invention, the through-hole or the concave portion is provided at a predetermined position of the mounting arm. By reducing the peripheral stress and forming the concave portion, the stress around the relevant portion can be improved. Therefore, by appropriately selecting the installation position, the stress can be easily adjusted, and the magnetic head can be maintained in a desired posture. As a result, the occurrence of defective products can be suppressed, and the output of the head and the malfunction can be prevented.

Further, the adjustment is a simple operation such as forming a through hole or a concave portion, and the amount of change in stress changed by providing one through hole or the like is relatively small.
Pressing by a delicate amount of force as in the prior art is not required. Further, the change of the stress corresponds to the opening position, number, size, etc. of the through-holes, so that by taking sample data, it is possible to compare the installation state of the appropriate through-holes with respect to the degree of inclination without using a skilled technique. It is possible to easily find the target.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a magnetic head is mounted on a mounting arm.

FIG. 2 is a work process diagram showing a first embodiment of a method of adjusting a mounting arm for a magnetic head according to the present invention.

FIG. 3 is a work process diagram showing a second embodiment of a method for adjusting a mounting arm for a magnetic head according to the present invention.

FIG. 4 is a perspective view showing an example of a mounting arm.

FIG. 5 is a side view showing an installation state of a general mounting arm.

FIG. 6A is a diagram illustrating an ideal state of a magnetic head supported by a mounting arm. (B) is a diagram showing an actual state of the magnetic head supported by the mounting arm.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mounting arm 2 arm body 3 first bent portion 4 magnetic head mounting portion 5 second bent portion 6 fixing plate 9 magnetic head 18 through hole

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Genichi Ishida 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) G11B 21/21

Claims (1)

(57) [Claims] An arm body having an elongated, substantially flat plate shape; a magnetic head mounting portion connected to a distal end of the arm body via a first bent portion; A predetermined magnetic head is mounted on the magnetic head mounting portion of the mounting arm having a fixed plate continuously provided through the bent portion, and is mounted at a predetermined position in the magnetic recording apparatus via the fixed plate. With this arrangement, the magnetic head is disposed so as to face a recording medium such as a magnetic disk, and the inclination of the magnetic head is checked in that state. A method of adjusting a mounting arm for a magnetic head, wherein a through hole or a concave portion is formed at a position to balance the stress of the mounting arm.