JPS6316008Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head having a structure having a butt-type core holder and suitable for use in tape recorders and the like.

Conventionally, in a magnetic head using this type of butt-type core holder, as shown in FIG. 1, a core holder 1A supports one head core 2A, a core holder 1B supports the other head core 2B, and both heads are Core holders 1A and 1B are butted and integrated, and the tape sliding surface 3 is polished. In this case, the opposing portions of the tips of the head cores 2A and 2B serve as the operating gap G.

By the way, in the conventional magnetic head as mentioned above,
After the core holders 1A and 1B are butted together, the curved surface of the tape sliding surface 3 is polished in order to improve the contact between the magnetic head and the magnetic tape, but in reality, the shape of the core holders 1A and 1B depends on the rod, case dimensions, etc.
The dimension d of the core holder 1 is different, and the core holder 1
Since it is difficult to find the butting surfaces of A and 1B, it is difficult to attach to multiple mounting jigs,
In order to find the position of the operating gap G, steps such as polishing the top and bottom surfaces of the core holders 1A and 1B are required. That is, there was a drawback that workability was poor when polishing the tape sliding surface.

In view of the above points, the present invention aims to provide a magnetic head with a core holder structure that allows the center line of the operating gap to be easily determined, thereby improving the workability of the curved surface polishing process of the tape sliding surface.

Embodiments of the magnetic head according to the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view of the tape sliding surface after the curved surface polishing process is completed, and FIG. 3 is an exploded perspective view of the tape sliding surface before the curved surface polishing step. In these figures, a non-magnetic core holder 1
C is provided with a C-shaped head core 11C having a winding 10 exposed from the front surface of the core holder 1C, and a tightening screw hole 12 is formed in the abutting surface of the core holder 1C, and both of the abutting surfaces The edge is formed with a slope 13 chamfered inwardly and outwardly by 45 degrees. Note that the abutting surfaces are lap-polished to a mirror finish.

On the other hand, the core holder 1D is made of the same material as the core holder 1C, and has a C-shaped head core 1 with a wire wound thereon.
1D is provided so as to be exposed from the front surface of core holder 1D. A through hole 14 is formed in the side surface of the core holder 1D at a position corresponding to the tightening screw hole 12, and the abutting surface of the core holder 1D is lap-polished to a mirror finish.

The core holders 1C and 1D are tightened together in abutted state by screwing the screw 15 into the tightening screw hole 12 through the through hole 14, and as a result, the C-shaped head cores 11C and 11D are tightened at the rear end. are joined and form a working gap G at the front end.

In the above configuration, the curved surface polishing of the front portions of the core holders 1C and 1D, that is, the tape sliding surface 3, is performed on the abutting surfaces of the core holders by grooves formed on the outer surfaces of both core holders by chamfered slopes 13, as shown in FIG. That is, since the center line of the operating gap G is known, this can be carried out by supporting this clear abutment surface with the jig 20. In this case, a curved surface polishing process can be performed by simultaneously arranging a large number of magnetic heads and mounting them on a jig so that the gap center line and the center of curvature of the curved surface are perfectly aligned.

As explained above, according to the above embodiment, after the core holders 1C and 1D are butted together, the center line of the operating gap G can be easily determined from the top and bottom surfaces of the magnetic head, and the contact between the magnetic head and the magnetic tape can be prevented. In the process of polishing the curved surface of the front part of the magnetic head, it is possible to simultaneously accommodate a large number of magnetic heads in a jig without individually positioning the center line of the operating gap. Therefore, the curved surface polishing process can be performed with extremely good workability.

FIG. 5 shows another embodiment of the invention. In this figure, chamfered grooves 30 are formed on both edges of the abutting surfaces of one of the core holders 1E and 1F. Note that the other configurations are the same as in the previous embodiment. In the embodiment shown in FIG. 5, the abutting surfaces of the core holder are also made clear, and the same effects as in the previously described embodiment can be expected.

Note that the head core may be constructed by a combination of a front core and a back core, and the chamfered slope or groove may be provided only on one edge of the abutting surface of the core holder.

As described above, the present invention provides a magnetic head that has a core holder structure that allows the center line of the operating gap to be easily determined, thereby improving the workability of the process of polishing the curved surface of the tape sliding surface.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional magnetic head; Figure 2 is a perspective view of a conventional magnetic head;
The figure shows an embodiment of the magnetic head according to the present invention, and is a perspective view showing the tape sliding surface in a state where the curved surface polishing process is completed, FIG. 3 is an exploded perspective view showing the state before the curved surface polishing process, and FIG. FIG. 5 is a front view showing a state in which the magnetic head shown in the example is mounted on a jig, and FIG. 5 is a front view showing another embodiment of the present invention. 1A to 1F...core holder, 2A, 2B, 1
1C, 11D... Head core, 3... Tape sliding surface, 10... Winding wire, 12... Tightening screw hole, 13
...Slope, 14...Through hole, 15...Screw, 20...
...Jig, 30... Chamfered groove.

Claims (1)

[Scope of utility model registration request] The magnetic head is formed by butting and integrating a first core holder having a first head core and a second core holder having a second head core forming a movement gap between the first head core and the first head core. A chamfered slope or a groove is formed on the edge of the abutting surface of at least one of the first and second core holders, and a groove indicating the position of the abutting surface is formed on the outer surface of both core holders that are abutted and integrated. Features a magnetic head.