JPH0328721B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing a magnetic head.

Conventional structure and its problems Conventionally, a full-width erase head for a VTR was shown in Figure 1A.
The head core block 4, on which the gap 1 has been formed, the tape sliding surface 2 has been processed, and the winding wire 3 has been wound as shown in FIG. 1, is inserted into the core block insertion recess 6 of the housing 5 shown in FIG. The configuration was such that it was fixed using adhesive. This insertion and fixation is performed by inserting the core block into the core block insertion recess 6 as shown in Fig. 2A.
The head core block 4 is inserted through the adhesive 8 into the flat bottom surface 7 of the tape from the side opposite to the tape sliding surface 2, and the tape sliding surface 2 is heated while being pressurized in the direction of the arrow to remove the resin. The adhesive 8 made of this material is cured and fixed. For this reason, the front surface A-A' and the rear surface B-B' of the head core block 4 inside the housing 5 are processed to be parallel, and the bottom surface C-C' of the core block insertion recess 6 of the housing 5 and the reference surface D- When D' is a right angle, the tilt angle formed between the front surface A-A' of the head core block 4 and the reference plane D-D' is maintained at approximately 90°, with only an error due to the thickness of the adhesive 8. However, as shown in Fig. 2B, if warpage occurs on the back surface of the housing 5 due to resin molding, etc., the position of the head core block 4 within the housing 5 cannot be easily applied with a simple pressurizing force from the front surface of the head. There was a problem in that the tilt angle θ could not be specified, and as a result, the tilt angle θ could not be accurately matched to a predetermined angle.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide a magnetic head that can accurately match the tilt angle to a predetermined value even when the housing is warped or deformed. .

Composition of the Invention In order to achieve this object, the present invention provides a protrusion at the approximate center of the bottom surface of the core block insertion recess of the housing, so that when the housing and the core block are rotatable, the tape sliding surface of the core block and the standard of the housing are provided. The core block and the housing are fixed to each other with an adhesive by contacting the core block and the housing with a jig having a plurality of surfaces each forming a predetermined angle.

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

In FIG. 3, reference numeral 10 denotes a housing, and a protrusion 13 is protruded from approximately the center of the bottom surface 12 of the core block insertion recess 11 of the housing 10. When the head core block 4 is inserted into the core block insertion recess 11 of the housing 10, the head core block 4 has an angle of α inside the housing 10 due to the height t of the protrusion 13 and the length H of the head core block 4. It can be rotated freely within the angular range of = sin2t/H. Therefore, the fourth
Even if the housing 10 is warped as shown in the figure, when the adhesive 8 is applied to the inner surface of the housing 10, the F-F The reference plane 10 of the housing 10 is
a, and apply forces F ₁ and F ₂ from the upper and rear surfaces of the housing 10, respectively, to bring the tape sliding surface 2 of the head core block 4 into close contact with the E-E' surface of the jig 14. The tape sliding surface 2 of the head core block 4 forms a perfect angle of 90 degrees with respect to the reference surface 10a of the housing 10, so that accurate tilting can be obtained. By curing the adhesive 8 while maintaining this state, a magnetic head with guaranteed tilt can be obtained without being affected by warpage on the back surface of the housing 10.

Effects of the Invention As explained above, according to the present invention, even if the housing is warped or deformed, the angle of the tape sliding surface of the head core block with respect to the reference surface of the housing can be accurately matched to a predetermined angle. obtain.

[Brief explanation of drawings]

Figure 1A is a perspective view of the head core block, Figure B is a perspective view of the housing of a conventional magnetic head, and Figure 2 is a schematic vertical cross-sectional view of the conventional magnetic head, and Figure A shows no warpage in the housing. Condition B is a condition where the housing is warped, Figures 3 and 4.
The figures show one embodiment of the present invention, Fig. 3 is a schematic vertical sectional view explaining the rotation range of the head core block within the housing, and Fig. 4 shows the state of adhesion between the housing and the head core block, which has warped. FIG. 2...Tape sliding surface, 4...Head core block,
8...Adhesive, 10...Housing, 11...Core block insertion recess, 13...Protrusion.

Claims (1)

[Claims] 1. A protrusion is provided at approximately the center of the bottom surface of the core block insertion recess formed in the housing, and the tape sliding surface of the head core block whose back surface is in contact with this protrusion and the reference surface of the housing are each at a predetermined angle. A method of manufacturing a magnetic head, characterized in that the head core block and the housing are fixed to each other with an adhesive in this state.