JPH08263814A - Azimuth adjusting device of magnetic disk device - Google Patents

Abstract

PURPOSE: To provide an azimuth adjusting device capable of easily adjusting and setting the azimuth of an R/W gap in a magnetic disk device. CONSTITUTION: Both ends of a carriage guide bar 3 are brought into contact with the first and second receiving parts 1a and 1b of a frame 1 and locked by a guide bar clamp 7. A polygonal adjusting button 8 is fixed by a fixing screw 9 to the frame 1 between the second receiving part 1b and the carriage guide bar 3, the distances of the three sides of this polygonal adjusting button 3 to the center of the fixing screw 9 are set equal to that from the center of the fixing crew 9 to the second receiving part 1b and the distances of the sides opposite these sides to the center of the fixing screw are set different from one another.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an azimuth adjusting device for an R / W gap of a head in a magnetic disk device.

[0002]

2. Description of the Related Art R / of a head in a magnetic disk device
The azimuth of the W gap is standardized, and the adjustment for the setting is the most important issue in manufacturing the magnetic disk device.

As a conventional mechanism for adjusting azimuth, as shown in FIG. 3, one end of a guide bar 3 of a head carriage 2 is moved to a protrusion 1c of a frame 1 to move an R / W gap 4 of the head. The adjustment screw 5 for adjusting the azimuth is provided, and the adjustment screw 5 is adjusted so that the azimuth becomes a specified value, or the taper pin 6 is inserted between the protrusion 1c of the frame and the guide bar 3 for adjustment. Although a method of doing so has been devised, how to fix these adjusting members has been a problem.

That is, the azimuth adjusting mechanism needs to be easily adjusted and to be firmly fixed after the adjustment, but the above method has a problem in the fixing method.

Further, as a simpler method, there is a method in which shims having different thicknesses are exchanged, but it is necessary to prepare several kinds of shims having different thicknesses when replacing the carriage, which is troublesome in manufacturing and at the same time troublesome. .

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide an azimuth adjusting device in which the azimuth can be easily adjusted and set.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the first invention is to provide both ends of a carriage guide bar with a first receiving portion and a second receiving portion of a frame. In a magnetic disk device that abuts against a portion and is restrained and fixed by a guide bar clamp plate, a polygonal adjustment piece fixed with a set screw is provided in a frame between the second receiving portion and the carriage guide bar, and the polygonal adjustment piece is adjusted. An azimuth adjusting device for a magnetic disk device, characterized in that a piece is provided with several sides having different distances from the center of the set screw.

A second aspect of the present invention is a magnetic disk device in which both ends of a carriage / guide bar are brought into contact with the first and second receiving portions of a frame and restrained and fixed by guide bar clamp plates. A polygonal adjustment piece is detachably provided on the frame between the carriage guide bars by a shaft or a set screw, and several sides of the polygonal adjustment piece are equal to the distance from the center of the shaft or the set screw to the second receiving portion. The azimuth adjusting device for a magnetic disk device is characterized in that the distance between the vertex of the side or corner opposite to that side and the center of the shaft or the set screw is different.

[0009]

According to the present invention, the azimuth can be changed by rotating the polygonal adjusting piece about the set screw or the shaft to change the side in contact with the carriage guide bar. Further, in the first invention, by tightening the set screw, the variation of the polygonal adjustment piece due to vibration or the like is prevented, and according to the second invention, the second receiving portion is set after the polygonal adjustment piece is set. The rotation of the polygon adjustment piece is reliably prevented, and the variation of the polygon adjustment piece is completely prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment to which the second invention is applied will be described with reference to the drawings. FIG. 1A is a plan view of the embodiment, and FIG. The same plan view of the state, (c) is a sectional view taken along the line AA, and FIG. 2 is an enlarged plan view of a main part. The same parts as those of the conventional device shown in FIG. 3 are designated by the same reference numerals.

The apparatus of this embodiment is remarkably different from the conventional apparatus shown in FIG. 3 in that a polygonal adjusting piece 8 is provided between the lower end of the carriage guide bar 3 and the second receiving portion 1b of the frame 1 facing the carriage guide bar 3. That is the point.

This polygonal adjustment piece 8 is fixed to the frame 1 by a set screw 9, and in the case of this embodiment, it is set so that the azimuth is set to the specified values ± 0, + a and -a, respectively. The distance from the center of the screw 9 is set to α, β, γ, and the distance from the second receiving portion 1b to the center of the stop screw 9 is the distance between the opposite three sides to the center of the stop screw 9. It has a hexagonal shape with three sides equal to the distance d.

Therefore, by changing the mounting position of the polygonal adjusting piece 8, it is possible to set azimuth ± 0, + a, -a, respectively.

In this embodiment, the polygon adjusting piece 8 is fixed by the set screw 8 and the polygon adjusting piece 8 is not completely rotated by the second receiving portion 1b. Alternatively, the frame 1 may be provided with a shaft for mounting the polygonal adjustment piece 8.

When the polygon adjusting piece 8 is fixed with the set screw 8, the polygon adjusting piece 8 and the second receiving portion 1b are provided.
Even if there is a gap between and, there is no practical problem (first invention).

The number of sides for adjusting the azimuth is not limited to three as in the embodiment, but in practical use, if the manufacturing control precision of the frame is sufficient, the number of sides of this embodiment is not limited. So 3 sides is enough.

After the polygonal adjusting piece 8 is set, the U-shaped guide bar clamp plate 7 is fixed by the set screw 10, and the guide bar 3 is fixed by the U-shaped restraining portions 7a and 7b. Is the same as.

[0018]

According to the present invention, the azimuth can be adjusted extremely easily without the need to prepare conventional shims having different thicknesses. Moreover, the polygonal adjusting piece is suitable for an azimuth adjusting device in consideration of the fact that the polygonal adjusting piece does not change due to vibration and the like, and has a simple structure and is easily implemented.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a plan view, FIG. 1B is a plan view with a guide bar clamp plate removed, and FIG. 1C is a sectional view taken along line AA. Is.

FIG. 2 is an enlarged plan view of the main part structure of the present invention.

FIG. 3 is a partially cutaway plan view of a conventional device.

[Explanation of symbols]

 1 frame 2 head carriage 3 carriage guide bar 4 R / W gap 5 adjustment screw 6 taper pin 7 guide bar clamp plate 8 polygonal adjustment piece 9, 10 set screw

Claims (2)

[Claims] 1. A magnetic disk drive in which both ends of a carriage / guide bar are brought into contact with a first receiving portion and a second receiving portion of a frame, and restrained and fixed by guide bar clamp plates, wherein the second receiving portion and the carriage. .A magnetic disk device characterized in that a polygonal adjusting piece fixed by a set screw is provided on the frame between the guide bars, and several sides having different distances from the center of the set screw are provided on the polygonal adjusting piece. Azimuth adjustment device. 2. A magnetic disk device in which both ends of a carriage / guide bar are brought into contact with a first receiving portion and a second receiving portion of a frame and restrained and fixed by a guide bar clamp plate, wherein the second receiving portion and the carriage. -A polygonal adjustment piece is detachably provided on the frame between the guide bars by a shaft or a set screw, and several sides of this polygonal adjustment piece have a distance from the center of the shaft or the set screw to the center of the shaft or the set screw. The azimuth adjustment of the magnetic disk device is characterized in that the distance to the receiving portion of 2 is made equal, and the distances to the vertices of the sides or corners opposite to those sides and the center of the shaft or the set screw are different from each other. apparatus.