JPS62112204A - Production of magnetic head for erasing - Google Patents

Abstract

PURPOSE:To decrease production processes as there is no need for spacers and to improve productivity by butting and tightening magnetic head cores which are projected with steps corresponding to the width of a magnetic gap at the top ends then polishing and cutting off the top ends including the steps to an arc shape. CONSTITUTION:The C-shaped magnetic head core 4 provided with the step 3 of the size corresponding to the width of the magnetic gap 2 at the top end 1 to contact a magnetic medium is formed. Such magnetic head cores 4 are disposed on both sides and the I-shaped magnetic head core 5 is disposed at the center thereof. The step 3 contact the central magnetic head core 5 when these magnetic head cores are tightened from both sides. The core for a magnetic head formed with the part to be used as the magnetic gap 2 is thus formed. The top end 1 of the core for the magnetic head including the step 3 is cut off as shown by a dotted line and is polished to the arc shape. Windings are formed on the central magnetic head core 5, by which the magnetic head for erasing of a double gap type is obtd. The magnetic head provided with the magnetic gap 2 of always the same size is obtd. simply by press welding the top ends 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is for erasing, in which a magnetic helad core having a step at the tip where a magnetic gap is formed in contact with a magnetic medium is butted and tightened, and the tip is polished in an arc. The present invention relates to a method for manufacturing a magnetic bed.

BACKGROUND OF THE INVENTION Various types of magnetic recording and reproducing devices use erasing magnetic heads to erase recorded signals. Conventionally, as shown in FIG. 5, as shown in FIG. 5, this type of erasing magnetic head has often been of the double-gear, lub-type type in which two magnetic gap rings are provided on the contact surface with the magnetic medium because of its good erasing efficiency.

The double-gap type erasing magnetic head is made by pressing a tip 10 of an engineered magnetic held core 5 made of magnetic material with spacers 6 such as glass or resin in between on both sides of the tip 1 of the C-shaped magnetic held core 4. stick. What about the engineering-like magnetic field core 5? A winding is applied to the bottle to receive the signal. The tip 1, which is pressed and fixed, is polished into an arc shape to form a magnetic head so as to have good contact with the magnetic medium.

Problems to be Solved by the Invention In the conventional erasing magnetic head, the spacer 6 is sandwiched between the tips 1 of the magnetic held cores 4 and 5 shown in FIG. 4,5
In the case of the double gap type, there are at least four bonding points, and there is also a disadvantage that the position of the spacer 6 is misaligned during bonding, requiring sufficient care and time for drying and increasing the number of steps.

Means for Solving the Problems The present invention eliminates such drawbacks of the conventional magnetic hemodynamic core 4,
In a magnetic head in which the tip l of No. 5 is butt-adhered as a magnetic gap f2 and polished in a circular arc.

The magnetic head cores 4 and 5 each having a protruding step 3 corresponding to the width of the magnetic gap 2 are butted against each other and tightened, and then the tip 1 including the two steps 3 is polished and cut 9 into an arc shape. This is a method of manufacturing an erasing magnetic head.

The magnetic gap f2 is easily formed by simply abutting the steps 3 of the tips 1 of the nodal cores 4 and 5 to the working magnetism, adhesively fixing the spacer 6 without pinching it, and polishing it in an arc to form the magnetic gap f2.

Embodiment An embodiment of the method for manufacturing an erasing magnetic head according to the present invention will be described with reference to FIGS. 1 and 2. FIG.

As shown in the drawings, a C-shaped magnetic nodal core 4 is formed in which a step 3 having a size corresponding to the width of the magnetic gap 2 is provided at the tip 1 in contact with the magnetic medium.

When this magnetic head core 4 is placed on both sides, an engineered magnetic throat core 5 is placed in the center, and the throat core 5 is tightened from both sides, the step 3 contacts the central magnetic throat core 5, forming a magnetic gap 2. Becomes the core. The tip 1 of the core of this magnetic bed, including the step 3, is cut off as shown by the dotted line and polished in an arc.

A double gap erasing magnetic head is manufactured by winding the central magnetic node core 5. Therefore, just by pressing the tip 10, the magnetic gap f always has the same size.
2 is obtained.

In the above embodiment, the C-shaped magnetic head cores 4 on both sides
Although we have described a double gap type in which the core of this type of magnetic head is butted against both sides of the central single-shaped magnetic head core 5, as shown in FIG.
It can also be applied to a magnetic head in which two letter-shaped magnetic nodal cores 5 are butted against each other and the magnetic gap 2 is one. Further, as shown in FIG. 4, a similar magnetic head can be obtained by making a step 3 corresponding to the width of the magnetic gap 2 project from the tip 1 of the nodal core 5 to the central one-shaped magnetic field.

Effect of the invention According to the present invention as described above, glass.

There is no need for a coating such as resin, which reduces the number of manufacturing steps, improves productivity, and reduces costs.

[Brief explanation of drawings]

FIG. 1 is an assembled front view of a double-gap magnetic head according to an embodiment of the method for manufacturing an erasing magnetic head of the present invention, and FIG. FIG. 3 is an external perspective view of a magnetic head core protruding with a step corresponding to the width of the magnetic gap, FIG. 3 is an assembled front view of the magnetic head core with the stepped magnetic head core of the present invention butted against both sides, and FIG. 4 is an assembled front view of the magnetic head core. An assembled front view of a double-gap type magnetic head with a step in the central magnetic nodal core and abutment of the magnetic nodal cores from both sides. Figure 5 is an assembled front view of a double-gap type magnetic nodal core using a conventional spacer. . In the figure, 1: Tip, 2: Magnetic gap, 3: Step, 4° 5: Magnetic tip core. Agent (7783) Attorney Ikeda Mado [α 6 Subesa Fig. 5

Claims (1)

[Claims] After abutting and tightening a magnetic core having a protruding step 3 having a size corresponding to the width of the magnetic gap at the tip 1, the step 3 is
A method of manufacturing an erasing magnetic head, comprising: polishing and cutting off the tip 1 in an arc shape.