JPS63231710A - Manufacture of straddle type magnetic head - Google Patents

Abstract

PURPOSE:To make a magnetic core highly accurate, to unit both cores for recording and reproduction, and erasure, and to increase the strength by forming many grooves at corner parts of core blocks for recording and reproduction, and erasure, and positioning the projection parts of one block at the groove part of the other. CONSTITUTION:The grooves are formed in the core comb-shaped block 15 for recording and reproduction which form an L type core 1 and an I type core 2 and the core block 16 for erasure which forms a nonmagnetic block 7, and the projection parts of one block are positioned at the groove part of the other; and glass is charged in the gap part 17 to join both blocks, which are sliced after external shape working to form a magnetic head. The track width TA of the block 15, the groove width TB of the block 16, and respective pitch PAPB are determined by machining with high accuracy; and both cores are united and increased in strength, and the man-hours of assembly are decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a straddle type magnetic head used in a flexible disk drive device.

BACKGROUND ART FIG. 9 shows a conventional magnetic head of this type, in which the recording/reproducing core 21 and the erasing cores 22 and 23 are independent, and the erasing core is different from the recording/reproducing core 21. 22 and 23 are positioned when attached to the slider 24. That is, a through hole 24a on which the recording/reproducing core 21 is placed on the slider 24 made of a non-magnetic material, and a through hole 2 on which the erasing cores 22 and 23 are placed, respectively.
4b.

24c, a recording/reproducing core and two erasing cores are inserted into the through holes, and a jig is used to position them when they are fixed with a non-magnetic adhesive.

Problems to be Solved by the Invention As described above, using separate and independent parts and assembling them individually results in a lack of dimensional stability, which leads to an increase in the number of man-hours, and also when the track becomes narrower due to higher recording densities. The accuracy of the core parts, the mounting of the recording/reproducing core, and the erasing core require even stricter management and handling due to positional accuracy.

Means for Solving the Problems In order to solve the above problems, the present invention forms a plurality of grooves at the same pitch in an erasing core block to form a comb-shaped block, and also provides a comb-shaped block in a recording/reproducing core block. A comb-shaped block is formed by forming a plurality of grooves at the same pitch as the above pitch, and a protruding portion between the grooves of the other block is formed in the groove of one block, and the protruding portion is connected to both side walls within the groove. Both blocks are arranged so as to maintain a predetermined interval, and the space is filled with a non-magnetic material to fix both blocks.

Effect: By the above means, a plurality of high-precision magnetic core chips with little individual variation can be obtained at once.

Embodiment Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 shows a magnetic helad core chip obtained in this example, in which a recording/reproducing core is constituted by an L-shaped core 1 and a ■-shaped core 2, and the joint portion thereof is filled with glass 3. A recording/reproducing cap 4 is formed. Further, numerals 5 and 6 are magnetic pieces, which are joined to the non-magnetic block 7, and the members 5, 6 and 7 form an erasing core.

Next, the process of obtaining the magnetic rad core chip shown in FIG. 1 will be described with reference to FIG. 2 and subsequent drawings.

First, a magnetic block 8 having a "U"-shaped cross section and a magnetic block 9 having a "■"-shaped cross section as shown in FIG. 2(a) are fixed with bonding glass 10 to form a recording/reproducing core block. 1
Form 1. Further, as shown in FIG. 2(b), the magnetic block 12 and the non-magnetic block 13 are joined to form an erasing core block 14.

One corner portion 11 of the core block 11 for recording/playback
A is grooved to form a recording/reproducing core comb-shaped block 15 as shown in FIG. 3(a). Further, the magnetic block 12 is also grooved to form an erasing core comb-shaped block 16 as shown in FIG. 3(b). Then, as shown in FIG. 4, the groove forming surfaces of both comb-shaped blocks are made to face each other, and as shown in FIGS. Position both comb-shaped blocks so that Note that FIG. 7 is a side view of the core block in this state.

In FIG. 6, TA indicates the width of the protrusion 15a of the recording/reproducing core comb-shaped block 15, that is, the track width of the recording/reproducing core comb-shaped block 15, and PA indicates the recording/reproducing core comb-shaped block 15. In addition, TB indicates the groove width of the erase core comb-shaped block 16, and this TB has a dimension equal to the track width PA plus twice the erase gap length EG. PB indicates the groove pitch of the erasing core comb-shaped block 16, and this dimension is
It is the same as the groove pitch PA of the core comb-shaped block for reproduction.

After positioning in such a relationship, the space 1 in each groove
7 is filled with glass and both blocks are fixed to form an integrated magnetic core block 18. The magnetic core block 18 thus created is then subjected to external shape processing, front depth regulation, and back depth removal processing in the same manner as the general magnetic core block processing method, and sliced with the desired number of tracks. and obtain a magnetic core chip element. For example, if you cut from the position indicated by the dashed line in FIG.
This results in individual magnetic core depth elements separated for each track. Then, the erasing core parts on both sides of this magnetic core chip element are polished to the specified dimensions.
Further, the lower connecting portion is ground into the shape shown in FIG. In this way, a magnetic rad core chip for a straddle type magnetic head, in which a recording/reproducing core and an erasing core are integrated, is completed. Then, the bobbin with the recording/reproducing winding is attached to the body of the L-shaped core of the recording/reproducing core, the back bar is fixed, and the magnetic pieces 5,
6 is magnetically connected with a magnetic body provided with an erasing winding,
Then, these are housed in a slider made of a non-magnetic material to complete a straddle type magnetic head.

Effects of the Invention As described above, in the manufacturing process of the straddle type magnetic head, the present invention positions the recording/reproducing core and the erasing core in the state of the core block. The feeding pitch can be easily regulated, and many high-precision magnetic cores with little variation can be obtained at one time. In addition, mechanical strength is increased because the recording/playback core and erasing core are integrated.
It also has the excellent effect of making handling and assembly easier during polishing work and reducing the number of man-hours.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a magnetic head core chip manufactured by an embodiment of the magnetic head manufacturing method of the present invention, and FIG.
a) and (b) are perspective views of a recording/reproducing core block and an erasing core block, respectively, and FIGS. 3(a) and (b) are a recording/reproducing core comb-shaped block and an erasing core comb-shaped block, respectively. FIG. 4 is a perspective view showing one step of the manufacturing method of the magnetic head of the present invention, and FIG. 5 is a perspective view showing the arrangement positions of the grooves of the recording/reproducing core comb-shaped block and the erasing core comb-shaped block. A plan view showing the relationship, FIG. 6 is a partially enlarged view of FIG. 5, FIG. 7 is a side view of the core block, FIG. 8 is a plan view of the magnetic helad core chip, and FIG. 9 is a conventional straddle type magnetic head. FIG. 1...L-type core, 2...I-type core, 3...Glass, 4...Recording/playback cap, 5.6... ...Magnetic piece, 7...
...Nonmagnetic block, 8...Magnetic block, 9...Magnetic block, 10...Glass for bonding, 11...Recording Core block for reproduction, 12...
...Magnetic block, 13...Non-magnetic block, 14...Erasing core block, 15...
・Core comb-shaped block for recording/playback, 15a...
Protruding portion, 16... Erasing core comb-shaped block, 17...
... Spatial section, 18... Name of magnetic core block agent Patent attorney Toshio Nakatashi and one other person Figure 3 Figure 6 Figure 4 Figure 5 Figure 8 Figure 9

Claims (1)

[Claims] A plurality of grooves are formed at the same pitch on the erasing core block to form a first comb-shaped core block, and a plurality of grooves are formed at the same pitch on the recording/reproducing core block, and forming a second comb-shaped core block so that the recording/reproducing gap is located in the protruding portion between the grooves;
A protruding portion between the grooves of the other comb-shaped core block is arranged within the groove of one comb-shaped core block so that the protruding portion has a predetermined distance from both side walls within the groove, and the protruding portion A method of manufacturing a straddle-type magnetic head, which includes a step of filling a space between the and both side walls with a non-magnetic material to fix both comb-shaped core blocks.