JP2542305Y2 - Magnetic head - Google Patents

Description

[Detailed description of the invention] a. Purpose of the invention [Industrial application field] This invention is a magnetic tape recorder, a magnetic card reader,
The present invention relates to a magnetic head used for a magnetic sensor or the like.

[Conventional technology]

FIG. 2 is an exploded perspective view of a conventional magnetic head of this type.

2. Description of the Related Art In assembling a conventional magnetic head, magnetic cores 1 and 2 having a pair of substantially U-shaped magnetic cores 1 and 2 provided with windings 3 and 4, respectively, are temporarily fixed to a holder 6 with an adhesive. The holder 6
The winding ends of the windings 3 and 4 applied to the magnetic cores 1 and 2 are soldered to the substrate 8 adhered in the substrate mounting portion 13 of the above, and the butted surfaces of the holder 6 are polished flat. After that, two magnetic cores 1,
A spacer 5 for a magnetic gap such as a titanium foil, a beryllium foil, or a copper foil is sandwiched between the abutting surfaces 2 and a screw 7 is tightened to temporarily assemble. Thereafter, in order to correct the displacement of the butted surface of the temporarily assembled magnetic core, the butted surface is shifted and adjusted while looking through the magnifying lens, and further tightened with the screw 7, and the resin is poured into the holder and completely fixed.
Then, the magnetic recording sliding surface of the magnetic gap portion is polished in a round shape to form a sliding portion with the magnetic recording medium.

Such a magnetic head according to the prior art deteriorates workability by adjusting the magnetic head to correct the displacement of the butted surface of the magnetic core. The die-cast material of aluminum or zinc used for the holder is excellent in mass productivity, but has poor abrasion resistance, so that the abutting surface of the magnetic core is shifted. If the displacement occurs, the sliding surface of the magnetic medium is damaged during use.

[Problems to be solved by the invention]

In order to solve the above-mentioned problem, the present invention improves the structure of the holder for fixing the magnetic core, and when the two holders are butted, the butted surfaces of the two magnetic cores are aligned with each other without displacement. Another object of the present invention is to provide an economical and highly reliable magnetic head which eliminates the need for adjusting the abutting surface and secures the components inside the holder by screwing.

B. Configuration of the Invention [Means for Solving the Problems] In the present invention, in order to solve these problems, the magnetic cores each provided with a winding are housed in a mounting groove of the holder, and the two holders are butted with the magnetic core. The two holders are positioned so that the surfaces coincide with each other, and the two holders are positioned with high accuracy and the wear-resistant positioning blocks are fitted into the respective grooves of the two holders. is there. That is, according to the present invention, a spacer for forming a magnetic gap, a pair of U-shaped magnetic cores sandwiching the spacer and applying a winding, and a substrate to which terminals of the winding are connected are formed by a substrate mounting portion and a magnetic field. A groove for mounting the core and a magnetic gap exposure window communicating with the groove are respectively housed in a pair of holders provided on the inner surface, and the inside of the holder is fixed with resin, and the pair of holders are fixed with screws. In a magnetic head in which a magnetic gap portion is round-polished, a positioning groove is provided on a magnetic recording medium sliding surface of the holder, and a positioning block is fitted in the positioning groove flush with the sliding surface. A magnetic head characterized in that:

[Action]

The butting surface of the magnetic core fixed to each holder that slides with the magnetic recording medium is accurately positioned. Therefore, positioning grooves for positioning are provided on the surfaces of the two holders that slide on the magnetic recording medium. Then, a positioning block having abrasion resistance is fitted into the groove. As a result, the two butted holders are accurately positioned and fixed. As a result, the abutting surfaces of the magnetic cores do not shift, so that no flaws occur on the surface of the magnetic recording medium. Further, since the positioning block can use a non-magnetic material having excellent wear resistance, the wear resistance of the sliding surface can be improved.

〔Example〕

 An embodiment of the present invention will be described below.

FIG. 1 is an exploded perspective view of the magnetic head of the present invention. The magnetic head of the present invention includes a pair of holders 6, a pair of U-shaped magnetic cores 1 and 2 provided with windings 4, and a spacer 5 forming a magnetic gap between the magnetic cores 1 and 2. The ends of the windings wound on the magnetic cores 1 and 2 are soldered, and a plate-like substrate 8 adhered to a holder 6, a rectangular plate-like positioning block 10, and a screw 7 for assembling and screwing these. Be composed. The holder 6 is divided into two parts at the center in a direction perpendicular to the sliding direction of the magnetic recording medium, and has a magnetic core mounting groove 11 and a magnetic gap exposing window communicating with the magnetic core mounting groove 11.
12, a positioning groove 9 for fitting the positioning block 10,
A substrate mounting portion 13 having an open end on the surface facing the sliding surface of the magnetic recording medium and having the substrate 8 suspended therefrom is provided. The magnetic core mounting groove 11 is provided on the inner surface of each of the two holders, and houses the magnetic core. On the other hand, the sliding surface of the magnetic recording medium of the holder communicates with the magnetic core mounting groove 11,
A magnetic gap exposing window 12 is provided so that a magnetic gap portion sandwiching the spacer of the magnetic core is exposed, and a positioning groove 9 also has an open end on the sliding surface so as to be adjacent to this window. It is provided on the inner surface. The positioning block 10 is fitted into the positioning groove 9 so as to be flush with the sliding surface of the magnetic recording medium. The substrate mounting portion 13 is provided at a position facing the positioning groove 9 provided in the holder, has an open end on a surface opposite to the sliding surface, and is provided so as to suspend the substrate 8.

The magnetic head of the present invention is assembled as follows. The windings 3, 4 are applied to the body of the magnetic cores 1, 2. The wound magnetic cores 1 and 2 are incorporated into a magnetic core mounting groove 11 provided on the inner surface of the holder 6 and fixed with an adhesive. Next, the substrate 8 to which the ends of the windings wound on the magnetic head are soldered is temporarily fixed to the substrate mounting portion 13 provided on the inner surface of the holder 6 with an adhesive. Thereafter, the butted surface of the holder 6 is polished flat. After the polishing, the spacers 5 for the magnetic gap are sandwiched between the magnetic cores 1 and 2, temporarily fixed, and the positioning blocks 10 are fitted into the positioning grooves 9 provided in the holder 6. As described above, the positioning block 10 is fitted into the positioning groove 9 so as to be flush with the sliding surface of the magnetic recording medium. The assembly of the magnetic head is completed by tightening the holder with the screw 7. The holder is completely fixed with screws, and after the assembly is completed, the magnetic recording sliding surface of the magnetic gap portion is polished into a round shape to provide a sliding surface with the magnetic recording medium. The positioning block 10 is a non-magnetic material having excellent wear resistance. In this embodiment, phosphor bronze is used. The positioning block 10 is fixed with an adhesive. The inside of the holder is fixed with resin, and the magnetic gap forming portion is polished in a round shape to form a sliding portion.

As described above, in the magnetic head of the conventional structure, the holder had to be shifted and adjusted in order to match the butted surfaces of the magnetic cores 1 and 2 after the temporary assembly, and the workability was poor, but in this embodiment, the rework after the assembly was performed. And the efficiency was significantly improved. At the same time, the wear resistance of the sliding surface can be improved, and the reliability can be improved.

C. Effect of the Invention [Effect of the Invention] As described above, according to the present invention, the position of the butting surface of the magnetic core is fixed at the same time when the holder is abutted with the screw, so that the position of the magnetic core can be adjusted. Is not required, the workability is improved, and the wear resistance of the sliding surface can be improved, so that an economical and highly reliable magnetic head can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a magnetic head according to the present invention. FIG. 2 is an exploded perspective view of a conventional magnetic head. 1,2 ... magnetic core, 3,4 ... winding, 5 ... magnetic gap spacer, 6 ... holder, 7 ... screw, 8 ... substrate, 9
... Positioning groove, 10 ... Positioning block, 11 ... Magnetic core mounting groove, 12 ... Window for exposing magnetic gap, 13 ... Board mounting part.

Claims (1)

(57) [Scope of request for utility model registration] A spacer for forming a magnetic gap, a pair of U-shaped magnetic cores sandwiching the spacer and applying a winding, and a substrate to which terminals of the winding are connected are formed by a substrate mounting portion and a magnetic field. A groove for mounting the core and a magnetic gap exposure window communicating with the groove are respectively housed in a pair of holders provided on the inner surface, and the inside of the holder is fixed with resin, and the pair of holders are fixed with screws. In a magnetic head in which a magnetic gap portion is round-polished, a positioning groove is provided on a magnetic recording medium sliding surface of the holder, and a positioning block is fitted in the positioning groove flush with the sliding surface. A magnetic head, characterized in that: