JPS5919940Y2 - magnetic head - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic head and is designed to ensure good bonding between a shield case and a washer (head mounting plate, tape guide).

For example, projection welding is generally used to join the head mounting plate 2 and tape guide 3 to the shield case 1 as shown in FIG.

FIG. 2 is a diagram showing a head mounting plate 2 provided with a projection 4 for conventional projection welding.

Projection welding is advantageous for joining objects with different heat capacities, and it is known that when the projection 4 is provided in the shield case 1 having a small heat capacity, the joining force after welding is strong.

However, in the conventional magnetic head, although the heat capacity of the shield case 1 is smaller than the heat capacity of the head mounting plate 2, the projection 4 had to be provided toward the head mounting plate 2.

That is, since the head gap 1a of the shield case 1 is polished before attaching the washer 14 to the shield case 11, the surface of the shield case 1 must be fixed with a manufacturing jig, and the projection 4 is attached to the surface of the shield case 1. If this is provided, the fixing of the manufacturing jig will not be stable and the precision of polishing the head gap 1a will decrease.

Therefore, in the conventional example, the projection 4 is provided toward the head mounting plate 2, which has a large heat capacity, but when the projection 4 is provided to the head mounting plate 2, which has a large heat capacity, the bonding force becomes weak, which poses a problem. Ta.

The present invention eliminates these drawbacks and will be described below with reference to the embodiments shown in FIGS. 3, 4 and 5.

11 is a shield case corresponding to 1 in FIG. 1,
A recess 12 is provided at the position where the washer is attached, and a projection 13 is provided in the recess 12.

14 is a washer (
For example, tape guides, head mounting plates).

That is, in the present invention, when the projection 13 is provided on the side of the shield case 11 having a large heat capacity, the recess 12 is provided so as not to cause any trouble in the head manufacturing process.
A projection 13 having a height lower than the surface of the shield case 11 is provided in the recess 12.

When the recess 12 is provided in the shield case 11 and the projection 13 is provided within the recess 12 in this way, the head gap 1a can be polished without the projection 13 protruding further from the surface of the shield case 11.
When the shield case 11 is fixed at a fixed position using a manufacturing jig, the fixation of the shield case will not become unstable due to projection.

Furthermore, in the present invention, since the projection is provided in a shield case with a small heat capacity, it has the effect of improving the bonding strength.

Further, according to this embodiment, the recess 12 can also contribute to fixing the head block provided in the case 11.

As is clear from the above embodiments, according to the present invention, a recess is provided in a part of the shield case and a projection is provided within the recess, so that the shield case 11 and the washer can be joined with strong joining force. Moreover, it has the advantage that processing accuracy does not deteriorate due to projection in the head manufacturing process.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional magnetic head, and FIG. 2A is a perspective view of a conventional magnetic head. The mouth is the front and top view of the washer used for the same head, and the third
4 is a sectional view of a main part of a magnetic head according to an embodiment of the present invention, FIG. 4 is a state diagram of a part of the magnetic head before joining, and FIG. 5 is a perspective view of a shield case. 11...Shield case, 12...Recess, 13...Fu. Logiection, 14...Washer.

Claims (1)

[Scope of utility model registration request] The washer includes a recess provided in a shield case, a projection provided on a bottom surface of the recess, and a washer having a protrusion inserted into the recess of the shield case, the washer inserted into the recess of the shield case. A magnetic head formed by projection welding the convex portion of the projection and the projection.