JP3112320B2 - Head assembly clamping mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for positioning and clamping a head arm on a mounting table in a magnetic head inspection apparatus.

[0002]

2. Description of the Related Art The performance of a magnetic head (hereinafter, simply referred to as a head) used in a magnetic disk drive is inspected at a manufacturing stage. In the inspection, the head is mounted on a head arm to form a head assembly, which is clamped on a mounting table, moved by a carriage mechanism, and seeks the magnetic disk for the head. The conventional head assembly 1 shown in FIG.
And a base 1c having a positioning elliptical hole 1d formed at the other end. FIG. 1B shows a conventional clamp mechanism 2, which includes a mounting table 21 having a positioning projection 211 and a slide bar 212,
It comprises a fixed portion 22 through which the slide bar penetrates, and two pressing pieces 23 for pressing both side surfaces of the base 1c. The head assembly 1 is mounted on the mounting table 21 by inserting the projection 211 into the elliptical hole 1d, and when the slide bar 212 is moved in the direction of arrow A by a drive mechanism (not shown), the mounting table moves and the projection 211 The base portion is pulled rightward in contact with the edge P of 1d, and the reference line K abuts on the fixing portion 22, so that the positioning in the front-rear direction and the angle determination in the horizontal direction are performed. Next, two pressing pieces 23 press both sides of the base 1c to clamp them on the mounting table.

[0003]

Recently, the recording density has increased due to the progress of magnetic media, and the size of magnetic disks has been reduced. For this purpose, ultra-small thin film heads have appeared. Correspondingly, the head assembly is considerably smaller than before. FIG. 3 shows a miniaturized head assembly 3, in which a head arm 3b is bent at both sides of a lightweight thin plate to increase the strength, and a square spacer 3c for positioning is welded to the base for reinforcement. . A circular hole 3d is formed at the center of the spacer 3c.
Is perforated, and its circumferential edge is as shown in the detailed view,
The inclined surface which is chamfered and forms an angle θ is formed with high precision. In this case, a point (or circumference) Q at the lower end of the slope at the front edge of the circular hole is used as a reference point for positioning in the front-rear direction. The trailing edge of the spacer 3c is also finished with high precision and is used as a reference line K for determining the angle with respect to the horizontal direction. As described above, the head assembly 3 is different from the conventional head assembly 1 in FIG. 2A in the way of setting a reference for positioning and angle determination, and therefore the conventional clamping mechanism 2 is not suitable for the head assembly 3.
A new clamping mechanism is needed. The present invention has been made in view of the above, and an object of the present invention is to provide a mechanism for stably and surely positioning and clamping a head assembly miniaturized corresponding to an ultra-small thin film head. Things.

[0004]

SUMMARY OF THE INVENTION The present invention provides a clamp mechanism for the above miniaturized head assembly, the clamp mechanism comprising: a mounting table for mounting a spacer welded to the head assembly; And a rotating portion supported by a compression spring. The urging force of the compression spring turns the pressing pin that presses the slope of the circular hole of the spacer to perform positioning in the front-rear direction, and the pressing piece that presses the edge of the rear end of the spacer to determine the lateral angle. It is configured to be attached to each part.

[0005]

In the above clamping mechanism, the rotating portion is rotated by a suitable means in the direction opposite to the bias of the compression spring to raise the pressing pin and the pressing piece, and the pressing pin is inserted into the circular hole. Place the spacer on the mounting table. In the clamping operation, when the rotating portion is rotated by the urging force of the compression spring, the pressing pin and the pressing piece press the slope formed on the circumferential edge of the circular hole of the spacer and the edge of the rear end of the spacer, respectively. Then, the spacer is positioned in the front-rear direction and angled in the horizontal direction, and is clamped on the mounting table.

[0006]

FIG. 1 shows a plan view and a side view of an embodiment of the present invention. In the clamp mechanism 4, the mounting table 41
Is provided with a through-hole 411 having a diameter slightly larger than the circular hole 3d of the spacer 3c. In addition, a rotating part is attached to a support 45 fixed to the base board.
A compression spring 46 for pivotally supporting the rotating part 44 and urging the rotating part, and a stopper 47 for the rotating part are provided. A lower bar 441 and an upper bar 443 are fixed to the rotating portion 44, and a cylinder 442 inserted into the through hole 411 of the mounting table is fixed to the lower bar 441, and the cylinder passes through the circular hole 3c of the spacer. Then, a pressing pin 48 having a slope corresponding to a narrow range of the front edge of the slope of the circular hole, and a pressing piece 49 having a width slightly smaller than one side of the spacer are attached to the upper bar 443, respectively.

The operation of the above clamp mechanism will be described.
When the rotating part 44 is pressed in the direction of arrow D opposite to the bias of the compression spring 46 by manual means or an appropriate means such as a robot mechanism and stopped at the position shown by the dotted line by the stopper 47, the pressing pin 48 The pressing pieces 49 both rise. The raised pressing pin is inserted into the circular hole 3d, and the spacer 3c is mounted on the mounting table 41. In the clamping operation, when the rotating portion rotates in the direction of arrow C by the urging force of the compression spring 46, the slope of the pressing pin 48 presses the leading edge of the slope of the circumferential edge of the circular hole 3d, and FIG. The reference point Q shown in the detailed diagram is positioned in the front-back direction. Subsequently, the pressing piece 49 presses the trailing edge of the spacer, and the reference line K is angled with respect to the horizontal direction.
Clamped to 41.

[0008]

As described above, in the clamp mechanism according to the present invention, the rotating part is rotated by the urging force of the compression spring, and the pressing pin and the pressing piece attached thereto are formed in the circular hole of the spacer. A simple structure that presses the slope formed on the peripheral edge and the edge of the rear end, clamps the spacer to the mounting table by positioning in the front-rear direction and determining the angle in the horizontal direction, miniaturizing This contributes to a head inspection device for the completed head assembly.

[Brief description of the drawings]

FIG. 1 shows a plan view and a side view according to an embodiment of the present invention.

FIG. 2A is an external view of a conventional head assembly,
(b) is an external view of a conventional clamp mechanism.

FIG. 3 shows a plan view and a vertical sectional view of a miniaturized head assembly to which the present invention is applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conventional head assembly, 1a ... Magnetic head, simply head, 1b ... Head arm, 1c ... Base, 1d ... Elliptical hole, 2 ... Conventional clamping mechanism, 21 ... Mounting table, 211 ... Projection, 212 ... Slide bar 22 ... Fixing part, 23 ... Pressing piece, 3 ... Miniaturized head assembly, 3a ... Thin film head, 3b ... Head arm, 3
c ... spacer, 3d ... circular hole, 4 ... clamp mechanism of the present invention, 41 ... mounting table, 411 ... through hole, 42 ... fixture, 43 ... base board, 44 ... rotating part, 441 ... lower bar, 442 ... Cylinder, 443: Upper bar, 45: Support, 46: Compression spring, 47: Stopper, 48: Press pin, 49: Press piece.

Claims (1)

(57) [Claims] 1. An inspection apparatus for a magnetic head, comprising: a head arm; a magnetic head fixed to one end of the head arm; and a circular hole welded to the other end and having a slope formed on a circumferential edge by chamfering. A head assembly comprising a rectangular spacer having: a mounting table on which the spacer is mounted; and a rotating portion pivotally supported by a support and urged by a compression spring. A pressing pin that presses an inclined surface of a circular hole of the spacer to perform positioning in the front-rear direction by a force, and a pressing piece that presses an edge of a rear end of the spacer to determine an angle in a horizontal direction, comprises: And a head assembly clamping mechanism.