JPS6357851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a magnetic head for a digital recording device such as a flexible disk.

This kind of magnetic head has a configuration as shown in FIGS. 1a and 1b, and FIG. 1a is an exploded perspective view showing the main components of the magnetic head. 2 is an erasing core arranged in parallel on both sides of the recording/reproducing core 1, 3 is a non-magnetic material such as glass provided on the erasing core 2, and 4 is a groove 4a into which the erasing core 2 is inserted. This is a fixed frame made of ceramic or the like. In order to assemble these components, as shown in FIG. 5B, using a jig (not shown), they are first momentarily fixed with an organic adhesive and then bonded by melting the glass.

At this time, an erasing gap 2a is formed at a predetermined distance between the side surface of the recording/reproducing core 1 and the erasing core 2.

However, in the magnetic head having the above structure, the two erasing cores 2, 2 and the front plates 4, 4 are separated and independent, making the assembly work complicated, and as shown in FIG. It is difficult to position the erase cores 2 and 2, the positional dimension A between the recording/reproducing gap 1a and the erase core 2, and the dimension B of the erase gap 2a vary, and the yield is reduced.

The present invention solves the above-mentioned drawbacks and provides a method for manufacturing a magnetic head that is easy to assemble and has high assembly accuracy.

Below, the present invention will be explained with reference to the drawings.
FIG. 3 is an exploded perspective view showing the main components of the magnetic head, and 5 shows an erasing core chip in which two erasing cores 2 made of ferrite, sendust, etc. are integrally formed with a non-magnetic material 3 such as glass. ,
A groove portion 3a having a predetermined size is formed in a part of the non-magnetic material 3.
is formed, and the erasing core 2 facing the groove 3a,
Non-magnetic material 3 is placed on the second side so as to have the erase gap dimension.
The remaining portion 3b is provided, and each erase core 2,
Protrusions 2b, 2b for positioning are formed on the end face side of 2, respectively.

Reference numeral 1 denotes a recording/reproducing core made of ferrite, sendust, etc., with a recording/reproducing gap 1a formed therein, and one leg 1b of the core 1 is provided with a dimension C from the end surface 1d to the gap 1a to a predetermined value. A stepped portion 1e is formed.

Reference numeral 6 denotes a front plate made of ceramic or the like, in which a first groove 6a and a second groove 6b which are perpendicular to each other are formed for inserting the recording/reproducing core 1 and the erasing core chip 5, respectively. An inclined groove 6c is provided.

To explain how to assemble the above-mentioned components, first, the recording/reproducing core 1 and the erasing core chip 5 are sequentially inserted into the first groove 6a and the second groove 6b of the front plate 6. At this time, the protruding portion 2b of the erasing core chip 5 fits into the second groove 6b and is accurately positioned, and the leg portion 1c of the recording/reproducing core 1 is inserted into the groove portion 3a of the non-magnetic material 3. after that,
The end surface 1d of the leg portion 1b of the recording/reproducing core 1 is pressed against the non-magnetic material 3 of the erasing core chip 5, the step portion 1e is inserted into the groove 3a of the non-magnetic material 3, and the recording/reproducing core 1 and the erasing core chip 5 are connected. Performs positioning.

Thereafter, a bonding material such as glass is melted into the inclined groove 6c of the front plate 6 to bond each component.

Finally, the front surface of the front plate 6 is polished to remove the connecting portion 6d of the first groove 6a.

According to the above assembly method, the combined dimensions of the recording/reproducing core 1 and erasing core 2 and the dimensions of the erasing gap 2a can be easily satisfied. In order to configure a magnetic head for a flexible disk, a U-shaped rear core 7 is further attached to the rear core 7 of the recording/reproducing core 1 to magnetically bridge the two erasing cores 2, 2. 8 will be provided.

Note that 9 is a recording/reproducing coil, and 10 is an erasing coil.

As described above, the present invention includes forming the erase core chip 5 in which the two erase cores 2, 2 are integrated with the non-magnetic material 3, and the first and second grooves 6a, 6.
By using the integral front plate 6 provided with b, handling and assembling work becomes extremely simple.

The erasing core chip 5 also has a groove 3a for insertion into the recording/reproducing core 1, and an erasing gap 2.
A remaining portion 3a of the non-magnetic material 3 is provided to form the recording/reproducing core 1 and the front plate 6.
This brings about remarkable effects such as accurately combining the positional dimensions and the erasure gap dimensions.

Further, as explained in the embodiment, the dimension C of the stepped portion 1e of the leg portion 1b of the recording/reproducing core 1 is set to a predetermined value, and the end surface 1d of the leg portion 1b is attached to the non-magnetic material 3 of the erasing core chip 5. If they are assembled by pressing them together, the positioning of the recording/reproducing gap 1a and the erasing core 2 can be reliably determined without using a jig or the like.

[Brief explanation of the drawing]

1A and 1B are perspective views of main parts of a conventional magnetic head, FIG. 2 is an explanatory diagram illustrating the positional relationship between a recording/reproducing core and an erasing core, and FIGS. 3 to 5 are perspective views of main parts of a conventional magnetic head. Regarding the manufacturing method of the head, Fig. 3 is an exploded perspective view of the main parts showing the structure of each part, Fig. 4 is a perspective view illustrating the assembly of the recording/reproducing core, erasing core, and front plate, and Fig. 5 is the magnetic FIG. 2 is a schematic perspective view showing the outline of the head. 1... Recording/reproducing core, 2... Erasing core, 2a...
...Erasing gap, 3...Nonmagnetic material, 3a...Groove, 3b...Remainder, 5...Erasing core chip, 6...
...Front plate, 6a...first groove, 6b...second groove.

Claims (1)

[Claims] 1. A step of cutting substantially orthogonal first and second grooves in a front plate made of a non-magnetic material. A groove is provided in the non-magnetic material of an erase core chip in which two erase cores are bonded by a non-magnetic material, and a predetermined erasing process is performed. a step of providing a remaining portion of the non-magnetic material having a gap size, inserting the recording/reproducing core into the first groove, and then inserting the erasing core chip into the second groove;
The present invention is characterized by comprising the steps of inserting a recording/reproducing core into the groove of the non-magnetic material, fixing the front plate, the recording/reproducing core and the erasing core chip with a non-magnetic material such as glass, and then polishing the front surface of the front plate. A method of manufacturing a magnetic head.