JPH01173377A - Magnetic head supporting body - Google Patents

Abstract

PURPOSE:To simplify constitution and to improve access accuracy by forming an inner reaction residual part, in which the size of residual inner reaction is difference according to a position, in the load arm flat part of a suspension spring. CONSTITUTION:In a load arm flat part 10a of a suspension spring 10 to support a jimbal spring 2, which supports a head slider 1, at one edge, an inner reaction residual part 10, where the size of the residual inner reaction is different according to the position, is formed. For example, the inner reaction residual part 10b is formed by pressing a jig for thermal processing to the load arm flat part 10a, being speedily heated and after that, being speedily cooled. Then, oscillation to be transmitted through the head slider 1 and the jimbal spring 2 to the suspension spring 10 is changed in the inner reaction residual part 10b of the load arm flat part 10a and attenuated. Then, the access accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in suspension springs used in magnetic head supports.

As shown in FIG. 4, a conventional magnetic head support includes a gimbal spring (2) that supports a head slider (1), and a suspension spring (2) that supports this gimbal spring (2) at one end.
3), and the other end of the suspension spring (3) is fixed to a magnetic head arm (not shown).

The suspension spring (3) is attached to the load arm (3a
) is thin compared to the length of the magnetic disk, so during operation, resonance or vibration occurs between the air gap layer between the magnetic disk and the suspension spring, resulting in poor access accuracy. Become.

As the above-mentioned vibration prevention technology, Japanese Patent Laid-Open No. 180855/1983 discloses a proposal to adhere a thin stainless steel plate to the rib side of the flat part of the load arm using a double-sided tape-like adhesive.

Conventional vibration prevention technology requires a large number of components, as described above, and requires additional processing such as bonding, resulting in high costs.

Furthermore, as is well known, the inside of a magnetic disk is extremely averse to dirt such as dust, but since adhesive is an organic substance, it has the disadvantage of peeling off during operation due to changes over time and aging, contaminating the inside of the magnetic disk. there were.

Means for Solving the Problems The present invention was proposed in order to solve the above-mentioned problems of the prior art. It forms a part.

As described above, the suspension spring of the present invention has different internal stress depending on the position of the load arm portion.

Therefore, the material itself has a damping effect by changing the vibration transmitted to the suspension spring through the head slider and gimbal spring at the load arm section.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

Figure 1 shows a suspension spring (10) that supports at one end a gimbal spring (2) that supports a head slider (1).
In the load arm flat part (10a), an internal stress residual part (10b) whose residual internal stress differs in magnitude depending on the position is formed in a substantially triangular area smaller in circumference than the load arm flat part (10a). It shows.

To introduce an example of a method for forming the internal stress residual portion (10b), as shown in FIG.
A heat treatment jig (20) is pressed against a), the heat treatment jig (20) is rapidly heated, and then rapidly cooled.

As a result, the part against which the heat treatment jig (20) is pressed is locally rapidly heated and quickly cooled with respect to other parts of the suspension spring (10), and the internal stress residual part (10b) is It is formed.

As rapid heating means for the heat treatment jig (20), for example, applying infrared rays from behind or high frequency induction heating can be used, and as rapid cooling means, for example, water or air can be used. Spraying can be used.

In the above-mentioned rapid heating, if the temperature is too high, the suspension spring (10) becomes soft or deformed. On the other hand, if the temperature is too low, sufficient internal stress cannot remain, so heating should be done at the A3 transformation temperature (900°C).
The settings are as follows, and the appropriate temperature is set depending on the shape. When selecting the appropriate temperature, the shape of the heat treatment jig (20) should be
A structure formed as shown in Figures (a) and (b) is sometimes used. Figure 3(a) shows the case where the thickness of a substantially isosceles triangle is gradually decreased from the base toward the apex side, and Figure 3(b)
is a case in which the load arm flat part (10a) of the suspension spring (10) is gradually increased. As a result, the heating and cooling conditions that the load arm flat part (10a) of the suspension spring (10) receives differs depending on the position, and the desired internal stress residual part ( 10b).

The shape of the internal stress residual portion (10b) is not limited to the approximately triangular shape shown in the figure, but may be circular, oval, rectangular, or
It can have various shapes such as a ring shape and a dendritic shape, and it may have not only a series of shapes but also a staggered shape or other dispersed shapes in the longitudinal direction and width direction of the load arm. The heat treatment jig (20) is made of stainless steel, other materials with good thermal conductivity, such as metals and ceramics.

Effects of the Invention According to the present invention, the vibration transmitted to the suspension spring through the head slider and gimbal spring changes and is attenuated in the internal stress residual part of the flat part of the load arm.
Access accuracy is improved.

In addition, unlike conventional vibration prevention technology, organic adhesives and thin stainless steel plates are not used, so there are fewer components, less processing effort, and an inexpensive suspension spring with vibration prevention function. I can provide it.

Furthermore, since no organic adhesive is used, the inside of the magnetic disk will not be contaminated by adhesive peeling.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing an embodiment of the present invention.
A perspective view showing an example of the manufacturing method of the example product shown in Fig. 1, and Fig. 3 (
FIG. 4 is a perspective view of a conventional product. (1) -Head slider, (2)--Gimbal spring, (10)--Suspension spring, (10a)
- Load arm flat part, (10b) - Internal stress residual part. Engraving of drawings (changes in content) Figure 3 (Method of engraving procedures) 1. Indication of the incident 1988 Patent Application No. 330934 2. Name of invention Magnetic head support 3. Amendment Relationship with the person who filed the patent application Name of patent applicant: Sanko Senki Kogyo Co., Ltd. 4, Agent: 8550

Claims (1)

[Claims] (1) In a magnetic head support that includes a gimbal spring that supports a head slider and a suspension spring that supports this gimbal spring at one end, the magnitude of residual internal stress is determined depending on the position on the flat part of the load arm of the suspension spring. A magnetic head support characterized by forming different internal stress residual parts.