JPH0725845Y2 - Magnetic head core block joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention This invention relates to the manufacture of magnetic heads used in magnetic recording devices such as VTRs and FDD heads, and is a technique for setting the gap depth size during manufacture.

2. Description of the Related Art Conventionally, in order to manufacture a magnetic head of this type, as shown in FIG. 3, ferromagnetic blocks 1 and 2 having different lengths are used, and the gap depth is used as a reference for the length block 1. After forming the gap film and butt-joining, the head front surface was polished on the basis of the reference so that the groove 5 was provided and the reference 3, 3 of the gap depth could be seen at both ends.

Incidentally, such a technique is disclosed in Japanese Examined Patent Publication No. 58-12647.

Problems to be solved by the invention When using the above-described conventional blocks 1 and 2 having different lengths, since the lengths are different, gap film formation, butt work after gap film shape, and gap depth adjustment polishing In the step (1), there is a drawback that defective products whose reference position is unknown are likely to occur due to chipping of the exposed end portion or the like.

In order to correct this defect, if block materials of the same size are used, this time, both side surfaces of both ends need to be mirror-polished to increase the number of man-hours in order to make it easier to observe the groove 5 that serves as a reference for the gap. Since the work is based on both side surfaces, there is a drawback that the batch processing work is difficult.

Means for Solving the Problem The present proposal uses a block material having the same length dimension, and by providing L-shaped processing on both ends of the block having no gap depth reference at a position where the reference is visible, the gap depth is provided. Based on the standard of depth, it is possible to set the dimension of the equal gap depth along the track width direction. That is, a magnetic head core block junction structure in which two magnetic blocks are superposed and joined to each other, and one magnetic block provided with a cut groove serving as a reference of the magnetic gap depth in the track width direction and another magnetic block Another magnetic block, which is a magnetic block and is formed by cutting out portions corresponding to both ends of the cut groove of the one magnetic block when the magnetic block is overlapped with the other magnetic block. The magnetic head core block joint structure is adopted.

Operation With this configuration, the present proposal allows the reference position of the gap depth to be confirmed as it is through the groove when forming the gap depth.

Further, the upper and lower portions of the groove protect the reference position, and the depth dimension can be clearly read without chipping or chipping.

Embodiment An embodiment of the present proposal will be described with reference to the drawings.

FIGS. 1 (a) and 1 (b) are a perspective view and a front view of a magnetic head core block butted together according to an embodiment of the present proposal.

The ferromagnetic block 1 is provided with a groove 5 serving as a reference for the gap depth, and the tangent line close to the polished surface is used as the reference 3. On the other hand, both ends of the ferromagnetic block 2 are notched into L-shapes 4 so that the reference 3 can be confirmed. Therefore, the ferromagnetic blocks 1 and 2 are combined to form a gap.

When viewed from the side of the ferromagnetic material block 2, both ends of the gap depth reference 3 of the ferromagnetic material block 1 can be seen from the groove 5 at both ends as shown in FIG. 1 (b), and the front surface of the head is polished based on this. or,
Reference numeral 6 is a glass-molded track groove. FIG. 2 is a perspective view of the ferromagnetic block 2 alone.

Effect of the Invention As described above, the present proposal provides an L-shaped notch at both ends of the ferromagnetic block that does not have the gap depth standard, so that there is no defect such as chipping, and the man-hour is accurate. There is an effect that the gap depth can be formed and workability can be improved.

[Brief description of drawings]

1 (a), (b) and FIG. 2 are a perspective view of a magnetic head core block according to an embodiment of the present invention and a front view of a butted state, and FIG. 3 is a core block for manufacturing a conventional magnetic head. It is a perspective view. 1, 2 ... Ferromagnetic material block, 3 ... Gap depth standard, 4 ...
L-shaped notch, 5 ... Groove with reference to gap depth, 6 ... Glass-molded track groove.

Claims (1)

[Scope of utility model registration request] 1. A magnetic head core block junction structure formed by superposing and joining two magnetic blocks, wherein one magnetic block is provided with a cut groove serving as a reference of the magnetic gap depth in the track width direction. Another magnetic block, which is another T-shaped magnetic block in which portions corresponding to both ends of the cut groove of the one magnetic block are cut out when the magnetic block is overlapped with the other magnetic block. A magnetic head core block joint structure comprising: a block.