JPS6338404Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a magnetic head.

Conventionally, the structure of this type of magnetic head is as follows:
The structure shown in the figure is publicly known. However, FIG. 1 is a sectional view of the magnetic head taken along the direction of the working gap at the position of the working gap of the chip core of the magnetic head. In Fig. 1, 1 is the joint surface of the operating gap, 2 is a chip core made of ferrite, etc., 3 is a magnetic shield plate made of ferrite, etc., 4,
4' is a non-magnetic material such as glass, 6 is a dummy core for magnetic shielding such as ferrite, and 5 is a chip core 2.
, the nonmagnetic material 4, and the magnetic shielding dummy core 6. 10 is a body core, and 7 is a lamination surface on which the nonmagnetic material 4 is laminated. At the same time, the laminated surface 7 is also a bonding surface between the body core 10 having a coil (the coil is not shown) and the chip core 2. Reference numeral 8 indicates the direction of inclination of the laminated surface 7, reference numeral 9 indicates the running direction of the magnetic tape, reference numeral 11 indicates a shield case such as permalloy, and reference numeral 12 indicates a casting resin such as epoxy for fixing the position of the core portion.

The structure of a conventional magnetic head having an inclined chip core is constructed as described above, and includes the joint surface 1 of the working gap, the chip core 2, the magnetic shield plate 3, the non-magnetic materials 4 and 4', and the magnetic shield. After temporarily fixing the chip part made up of the dummy core 6 and the body core 10 on the laminated surface 7 with instant adhesive, they are inserted into the shield case 11, and after determining the position, the molding resin 12 is cast and fixed. Ta. However, in the magnetic head of the present invention, since the core portion is inclined, it is very difficult to determine the position accurately.

Furthermore, the casting resin 12 may be deformed at high temperatures, and if the core part is fixed only with the casting resin 12, the stability of the fixing position against temperature will be reduced, which will affect the characteristics of the magnetic head itself. There is a possibility that it will come.

This idea was made in order to eliminate the drawbacks of the conventional ones as described above. By determining the positional relationship between the shield case 11 and the core part using a positioning member such as a holder, the positioning workability is improved and the temperature The purpose of this invention is to provide a magnetic head with good characteristics against changes in the magnetic field.

FIG. 2 shows a cross section of a magnetic head according to an embodiment of the invention taken at the position of the working gap of the chip core 2 along the direction of the working gap. Common parts and parts in each figure below are shown in the first section.
Indicated by the same reference numerals as in the figure. In FIG. 2, 13 is a holder made of die cast, etc., and 14 is the holder 1.
A reference portion 15 is in contact with one surface of the shield case 11 and one surface of the inside of the shield case 11; a core receiving portion 15 is inclined at the same angle as the inclination angle of the laminated surface 7 with respect to the reference surface including the reference portion 14, and is in contact with the body core 10; is a holding surface of a non-magnetic spring 17 for pressurizing and fixing the body core 10. Figure 3 shows holder 13
FIG. In this embodiment, as shown in FIG. 2, a chip core portion consisting of a chip core 2, a magnetic shield plate 3, non-magnetic materials 4, 4', and a dummy core 6, and a body core 10 are used as a receiving surface for a core receiving portion 15. Joined by the elastic force of spring 17,
Thereafter, the shield case 11 is inserted into the shield case 11, the positions of the shield case 11 and the holder 13 are determined by the reference part 14, and the shield case 11 and the holder 13 are bonded and fixed with instant adhesive or the like. In the above embodiment, the reference part 14 and the core receiving part 15 of the holder 13 are
is assumed to be a flat surface, but the same effect can be obtained even when the surface is not a flat surface, such as a protruding reference portion 14' and a stepped core receiving portion 15', as shown in FIG. Further, instead of the non-magnetic spring 17, the body core 10 may be pressed and joined using a screw or the like, and screw holes 18 are shown in FIG.

As described above, the present invention includes a chip core 2 having an operating gap, a body core 10 joined to the chip core 2 and having a coil, and a magnetic tape laminated on the chip core 2 and together with the end portion of the chip core 2 including the operating gap. A laminated member constituting a sliding surface 5 of the chip core 2 and the laminated member, and a laminated surface 7 of the chip core 2 and the laminated member is parallel to the running direction 9 of the magnetic tape and prevents sliding of the magnetic tape in the vicinity of the operating gap. In a magnetic head that is inclined with respect to a plane perpendicular to the plane 5, there is a reference portion 14 that is in contact with a certain surface inside the shield case 11 of the magnetic head, and the laminated surface is connected to the reference plane including the reference portion 14. The core receiving portion 15 contacts the body core 10 at the same angle as the inclination angle of No. 7.
The positional relationship between the shield case 11 and the core part is controlled by a non-magnetic spring 17 for pressing and fixing the body core 10, a holding surface 16 for screws, etc., or a non-magnetic holder 13 having screw holes, etc. By determining this, positioning can be made easily, improving work efficiency, and since the core part is securely fixed by the holder 13, the stability of the fixing position against temperature changes is improved, and magnetic properties with good characteristics are improved. You can get a head.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional magnetic head taken along the direction of the working gap at the position of the working gap of the chip core 2 of the magnetic head. Second
The figure is a sectional view of a magnetic head according to an embodiment of the present invention, taken at the position of the working gap of the chip core 2 along the direction of the working gap. FIG. 3 is a perspective view of the holder 13. Fourth
The figure is a perspective view of a holder 13' showing another example of application. 2... Chip core, 5... Sliding surface of magnetic tape, 7... Laminated surface, 9... Running direction of magnetic tape, 10... Body core, 11... Shield case, 13, 13'... Holder, 14 ,14'...
Reference part, 15, 15'... Core receiving part, 16...
Spring holding surface, 17...Non-magnetic spring, 18...Screw hole.

Claims (1)

[Scope of utility model registration request] A chip core having a working gap, a body core joined to the chip core and having a coil, and a laminated member laminated on the chip core and forming a sliding surface of a magnetic tape together with an end of the chip core including the working gap. The laminated surface of the chip core and the laminated member is parallel to the running direction of the magnetic tape, and is inclined with respect to a plane perpendicular to the sliding surface of the magnetic tape in the vicinity of the working gap. In the head, there is a reference part that is in contact with a certain surface inside the shield case of the magnetic head, and a core holder that the body core is in contact with while being inclined at the same angle as the inclination angle of the laminated surface with respect to the reference plane that includes the reference part. The positional relationship between the shield case and the core part is determined by a non-magnetic holder having a spring, a retaining surface for screws, etc., or a screw hole for pressurizing and fixing the body core. magnetic head.