JPH05325459A - Magnetic disk head - Google Patents

Abstract

PURPOSE:To surely restrain residual vibration as to a magnetic disk head which restrains the residual vibration at the time of seeking. CONSTITUTION:In a magnetic disk head constituted by attaching a core slider 23 to one end of a spring arm 21, which is fixed in a laminated state on an arm disposed on a carriage through a spacer 22, through a gimbal 24, a vibration absorbing material 26 is disposed at or near a connecting part between the spring arm 21 and the spacer 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk head, and more particularly to a magnetic disk head capable of suppressing residual vibration during seek.

A magnetic disk device has a structure in which a disk disk held by a spindle is rotated, a magnetic disk head is supported by a carriage, and the disk disk is arranged so as to face the disk disk.

At the time of seek, the magnetic disk head moves between tracks on the disk disk, and the read / write processing is executed. The time required for positioning the magnetic disk head during seek has recently been particularly required to be increased in speed, and it has been necessary to suppress the residual vibration of the magnetic disk head as one of the factors for achieving the increased speed.

[0004]

2. Description of the Related Art An example of a conventional magnetic disk head is shown in FIG.
FIG. 5 shows an outline of the magnetic disk device.

As shown in FIG. 5, a plurality of disc disks 3 are stacked on a spindle 2 held on a base 1, and a spindle motor (not shown in the figure) for rotating the disc disks 3 is further provided. Further, the core slider 5 for reading / writing the information recorded on the disk 3
Are arranged so as to face the upper and lower disc disks 3 between the stacked disc disks 3. The core slider 5 is fixed to an arm 7 via a spring arm 6, and the arm 7 is fixed to a carriage 8.
In addition, each of the above components is housed in the cover 13 in a hermetically sealed state to prevent dust from entering.

As shown in FIG. 4, the conventional magnetic disk head 9 includes a core slider 5, a spring arm 6, a gimbal 10, a damping sheet 11, and a spacer 1.
It is composed of 2 etc. The gimbal 10, the spring arm 6, and the spacer 12 are joined together by welding, and the core slider 5 is further bonded onto the gimbal 10 to form the magnetic disk head 9.

[0007]

As described above, in recent years, there has been a demand for high speed magnetic disk devices, and therefore residual vibration of the magnetic disk head must be suppressed. The main cause of this residual vibration is the spring arm 6 that occurs during seeking, and it is necessary to appropriately increase the rigidity of the spring arm 6 in order to suppress the residual vibration. The damping sheet 11 is provided for this purpose, and is attached to the upper surface of the spring arm 6 over a predetermined range. A resin sheet or the like was used as the damping sheet 11.

However, although the damping seat 11 is provided on the spring arm 6, although some effects are observed, residual vibration cannot be suppressed until the speedup of the magnetic disk device is sufficiently satisfied. There was a problem.

The present invention has been made in view of the above points, and an object of the present invention is to provide a magnetic disk head capable of reliably suppressing residual vibration.

[0010]

SUMMARY OF THE INVENTION The above-described problems are solved by a magnetic slider having a structure in which a core slider is attached via a gimbal to one end of a spring arm fixed to an arm provided on a carriage in a stacked state via a spacer. This can be solved by a magnetic disk head characterized in that a vibration absorbing material is arranged at or near the joint between the spring arm and the spacer in the disc head.

Further, by using a polyimide adhesive as the vibration absorbing material, and by disposing a damping sheet functioning as a vibration damping material on the spring arm together with the vibration absorbing material, a more effective solution is achieved. can do.

[0012]

By configuring the magnetic disk head as described above, it is possible to improve the rigidity of the spring arm, particularly at the position where the spring arm is disposed, and suppress the occurrence of residual vibration.

The residual vibration is generated by the vibration of the spring arm. In the cantilever type spring arm, even if a minute vibration is generated at the fixed position, the free end (the tip end) of the spring arm is generated. ), The minute vibration is amplified into a large vibration. Therefore, it is possible to effectively suppress the occurrence of residual vibration by disposing the vibration absorbing material at the joint between the spring arm and the spacer, which is a position near the arm fixed to the arm, or in the vicinity thereof to increase the rigidity.

[0014]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows a magnetic disk head 20 which is an embodiment of the present invention. The main part of the present invention lies in the structure of the magnetic disk head 20, and the magnetic disk device in which the magnetic disk head 20 is arranged is the same as the structure described with reference to FIG. Is omitted (for convenience of explanation, if it is necessary to describe the configuration of the magnetic disk device in the following description,
The reference numbers attached to FIG. 5 are added).

In the figure, reference numeral 21 is a spring arm, which is attached to the upper and lower surfaces of the arm 7 fixed to the carriage 8 via a spacer 22. The spring arm 21 is made of a flexible spring plate material.

The core slider 23 is held by the spring arm 21 via a gimbal 24. The core slider 23 is composed of a magnetic head portion for performing read / write processing and a slider portion for floating the magnetic head portion.
Floats and constitutes a so-called floating magnetic head. Further, the core slider 23 is configured so that its inclination can be changed flexibly by the flexible deformation of the gimbal 24.

In the figure, reference numeral 25 is a damping sheet, which is attached to the spring arm 21. This damping sheet 25 is made of resin called VEM and made of SUS.
It has a structure in which (stainless steel) is laminated and functions as a vibration damping material. Therefore, the vibration generated in the magnetic disk head 20 at the time of seek is reduced to some extent by the damping sheet 25.
As described above, it is still impossible to realize sufficient vibration suppression only with No. 5.

Further, reference numeral 26 in the drawing denotes a vibration absorbing material which is an essential part of the present invention, and is made of, for example, an epoxy adhesive having a slight flexibility. This vibration absorber 26
Is arranged at the joint between the spring arm 21 and the spacer 22. The vibration absorbing material 26 can be easily arranged by simply applying an adhesive to the joint portion.

As described above, the residual vibration is generated by the vibration of the spring arm 21 during the seek. Further, in the cantilever-shaped spring arm 21, even if a minute vibration is generated at the fixed position (that is, the position where the spacer 22 is arranged), the spring arm 21.
At the tip of the core slider 23, the minute vibrations are amplified into large vibrations. Further, as shown in an enlarged manner in FIG. 2, the spring arm 21 and the spacer 2 are
There is a slight gap portion 27 at the joint portion with 2, and the presence of this gap portion 27 also promotes the vibration during seek.

Therefore, the vibration absorbing material 26 is disposed at the joint between the spring arm 21 and the spacer 22 which is the position fixed to the arm 7 to increase the rigidity of this joint, and the gap 27 is provided at the vibration absorbing material. With the configuration of being filled with 26, the occurrence of residual vibration can be effectively suppressed.

FIG. 3 is a diagram for explaining the effect of the present invention, and shows the vibration characteristics of the magnetic disk head 20 when seeking. In the figure, the vertical axis represents the gain,
The horizontal axis represents frequency. Further, in the figure, the solid line shows the characteristics of the magnetic disk head 20 according to the present invention, and the broken line shows the characteristics of the conventional magnetic disk head. As shown in the figure, the gain at the resonance point (indicated by the arrow A in the figure) is about -40 dB,
The magnetic disk head 20 according to the present invention has a level of -50 dB, which shows that the generation of residual vibration is effectively suppressed.

In the above embodiment, an example in which a polyimide adhesive is used as the vibration absorbing material 26 is shown, but the vibration absorbing material is not limited to this, and the spring arm 21 and the spacer 22 are joined together. Other materials can be used as long as they have a function of increasing the rigidity of the portion and filling the gap portion 27.

Further, in the above-described embodiment, the vibration absorbing material 26 is arranged at the joint between the spring arm 21 and the spacer 22. However, the vibration absorbing material 26 may be arranged near the joint so that the effect can be realized. it can.

Further, in the above-described embodiment, the damping sheet 25 and the vibration absorbing material 26 are both arranged on the spring arm 21 in order to suppress the residual vibration, but only the vibration absorbing material 26 is arranged. Even with this configuration, the suppression of residual vibration can be reduced. However, by using both the damping sheet 25 and the vibration absorbing material 26, it is possible to reliably suppress the residual vibration during seek.

[0026]

As described above, according to the present invention, it is possible to improve the rigidity of the spring arm, particularly at the position where the spring arm is disposed, and it is possible to suppress the occurrence of residual vibration.

[Brief description of drawings]

FIG. 1 is a perspective view showing a magnetic disk head according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing a joint between a spring arm and a spacer.

FIG. 3 is a diagram for explaining the effect of the present invention.

FIG. 4 is a perspective view showing an example of a conventional magnetic disk head.

FIG. 5 is a diagram showing an example of a magnetic disk device.

[Explanation of symbols]

 20 Magnetic Disk Head 21 Spring Arm 22 Spacer 23 Core Slider 24 Gimbal 25 Damping Sheet 26 Vibration Absorbing Material

Claims (3)

[Claims] 1. A gimbal (2) is attached to one end of a spring arm (21) fixed in a stacked state to an arm (7) arranged on a carriage (8) via a spacer (22).
4) In a magnetic disk head having a core slider (23) attached via a vibration absorber (26) at or near the joint between the spring arm (21) and the spacer (22). A magnetic disk head characterized by being installed. 2. The magnetic disk head according to claim 1, wherein the vibration absorbing material (26) is a polyimide-based adhesive material. 3. A magnetic sheet according to claim 1, wherein a damping sheet (25) functioning as a damping material is arranged on the spring arm (21) together with the vibration absorbing material (26). Disk head.