JPS6275986A - Supporting system for magnetic head - Google Patents

Abstract

PURPOSE:To enlarge a head spacing by constituting a load applied to a magnetic head by >=2 spring members in a gimbal support system for supporting the magnetic head. CONSTITUTION:A spring part 6 is provided and a head load is changed by changing the quantity of deflection of the spring part 6. In the spring part 6, a gimbal is doubled, a part of the gimbal is fixed and only the spring part may be separated. In a state shown by a solid line in the drawing, since one added spring member 7 is free, the head load is applied only by the spring member. By raising the fixed member 7 in a direction shown by an arrow, the deflection of the spring part 6 applies the load to the head. By constituting in this manner, the load of the head can be changed, so that when the head is not used, a head spacing can be enlarged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a head support system for a magnetic disk drive, and particularly to a magnetic head support system suitable for making head load variable.

[Background of the invention]

Conventional devices have a structure in which when the head is floating on a magnetic disk, the head load is applied by the deflection of a spring in the support system (see: IBM,
TRM Journal of Research
and Daralopment), November 1974.

p489-505), therefore Read/vrj t
No consideration was given to the time when the head is not in use other than the time e.

[Purpose of the invention]

The object of the present invention is to
/ To provide a magnetic head support system that can easily expand the head spacing without impairing the flying characteristics of the head during times other than write.

[Summary of the invention]

The above purpose is to increase the head load only when the head is in use. Alternatively, when uncomfortable, this can be achieved by reducing the head load, but against vertical movement of the disk surface,
The head needs to be able to follow the target sufficiently. To achieve this, it is necessary to vary the amount of deflection of the spring material that applies the load to the head, or to vary the stiffness of the spring. The present invention pays attention to this point and attaches a spring member for variable load to a conventional gimbal to achieve a -1-lifting effect.

[Embodiments of the invention]

An embodiment of the present invention will be described below.

Figure 1 shows the basic structure of a conventional Whitney type gimbal, in which the spring section 4 is bent from the free state shown by the chain line to the state shown by the solid line to apply a load to the head. . Therefore, if the vertical movement of the disk surface is small compared to the amount of deflection of the spring, a constant load will always be applied to the head.

FIG. 2 shows a conceptual diagram of the present invention. In other words, newly
By providing a spring portion 6 and changing the amount of deflection of the spring portion 6, the head load can be changed. The spring part 6 may be formed by stacking two conventional gimbals, fixing two parts of the gimbal, and making only the spring part separable. In the state shown by the solid line in FIG. 2, one of the added spring members 7 is free, so the head load is applied only by the spring member 4. By pulling 7 in the direction of the arrow, the deflection of the spring member 6 applies a load to the head.

FIG. 3 shows a mounting method for pulling the end 7 of the spring member 6, and the state shown in FIG. 3 shows the state where the head load is the largest. The pin 10 is fixed to 7 and passes through a hole provided in the head arm 1° fixing member 5.

11 is made of a shape memory alloy for driving the pin 10 up and down, and one end is fixed to an arm, and when energized, the pin 10 is pulled.

The drive source 11 does not need to be limited to a shape memory alloy, and a solenoid or the like can be substituted, but considering that the arm will enter between the disks, it is desirable to use a shape memory alloy that is small and lightweight and capable of large displacement.

Hereinafter, we have explained how to apply a new load to the conventional gimbal back type, but conversely, to reduce the load, it is easy to add the spring member 6 in the opposite direction as shown in Fig. 4. can be achieved. In FIG. 4, the shaded area indicates a cross section, and the mechanism for pulling the fixing member 7 is omitted. As an additional effect, according to this configuration, if the spring member 6 is made of a material having higher rigidity than the spring member 4, loading/unloading operations can also be performed.

〔Effect of the invention〕

According to the present invention, since the load on the head can be made variable, the head spacing can be increased when the head is not in use, and the lifespan until the head crashes can be greatly extended.

[Brief explanation of drawings]

Fig. 1 is a conceptual diagram of a conventional head support system, Fig. 2 is a conceptual diagram of the present invention, Fig. 3 is a detailed explanatory diagram of the present invention, and Fig. 4 is another conceptual diagram of the present invention. show. DESCRIPTION OF SYMBOLS 1... Head arm, 2... Gimbal, 3... Magnetic head, 4, 6... Gimbal spring member, 5, 7...
...Fixing member, 10... Pin, 11... Drive unit. Figure I Figure 2 Country 4

Claims (1)

Claims: 1. A gimbal support system for supporting a magnetic head of a magnetic disk device, characterized in that a load applied to the magnetic head is constituted by two or more spring members. 2. A support system for a magnetic head according to claim 1, wherein one of the spring members is fixed to a support arm, and the head load is made variable by another spring member. . 3. A support system for a magnetic head according to claim 2, wherein the spring member for varying the head load is made of a shape memory alloy.