JPS60607A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent the deterioration in a magnetic recording and reproducing efficiency due to the increase in a magnetic resistance at a gap of a rear part through inexpensive and simple constitution by adopting a structure where the rear gap is coated so as to be short-circuited by a magnetic thin film or a thin plate. CONSTITUTION:A front gap part 1, the rear gap part 2, core halves 3, 4 and a winding 5 are formed conventionally and the thin film or thin plate 6 made of a magnetic material with a high permeability is provided on both side faces of a butted part between the core halves 3 and 4 constituting the rear gap part 2 so as to short-circuit magnetic flux in the rear gap part 2 thereby preventing the deterioration of the efficency due to magnetic resistance.

Description

Detailed Description of the Invention: Technical Field The present invention relates to a magnetic head, and more particularly, the present invention relates to a magnetic head, and more particularly, a magnetic core half made of a magnetic material has a front gap portion in contact with a magnetic recording medium and a rear gap portion opposite thereto. The present invention relates to magnetic heads in which a ring-shaped magnetic circuit is formed by abutting each other through a ring-shaped magnetic circuit.

Prior Art Conventionally, in this type of magnetic head, the gap-forming surface of the half-hole of the magnetic core made of a magnetic cell with high magnetic permeability is polished to obtain the desired surface precision, and then the gap-forming surface is polished with glass or metal. A gap is formed using a non-magnetic material such as a thin plate, and winding is applied after or before the gap to form a magnetic head.

FIG. 1 shows an example of a conventional structure. Reference numeral 1 indicates a front gap portion made of a non-magnetic material, and a rear gap portion 2 opposite thereto is formed by bringing core halves 3 and 4 made of a magnetic material with high magnetic permeability into close contact with each other. has been done. 5 is the entire line.

From the standpoint of magnetic recording and reproducing efficiency, it is necessary for the front gap portion 1 to have a sufficiently higher magnetic resistance than the core halves 3 and 4 forming the core portion. , the high magnetic resistance in the rear gap part 2 only reduces the magnetic recording and reproducing efficiency and is rather harmful. was there.

Eyes meet.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and it reduces the magnetic resistance of the rear gap portion of a magnetic head to improve the efficiency of magnetic recording and reproduction, and at the same time improves the alignment of the half cores. It is an object of the present invention to provide a magnetic head configured such that its strength can also be increased.

Embodiment 1 Embodiment 1 FIG. 2 explains a first embodiment of the present invention. In the drawings, the same parts as in FIG.

In this embodiment, the front gap part 1, the rear gap part 2, the core halves 3 and 4, and the winding 5 are the same as the first part of the conventional example.
As shown in the figure, a thin film or thin plate 6 made of a magnetic material with high magnetic permeability is attached to the core half 3 forming the rear gap portion 2.
and 4, to short-circuit the magnetic flux in the rear gap portion 2 and prevent a decrease in efficiency due to magnetic resistance.

Second Embodiment FIG. 3 explains a second embodiment of the present invention. In the figure, the same parts as in FIGS. 1 and 2 are denoted by the same reference numeral 7, and the explanation thereof will be omitted.

In this embodiment, a thin film or thin plate 6' made of a magnetic material with high magnetic permeability is formed in a U-shape on both sides of the abutting part of the core halves 3 and 4 constituting the rear gap part 2. And the bottom surface is coated to short-circuit the magnetic flux in the rear gap portion 2.

Third Embodiment FIG. 4 illustrates a third embodiment of the present invention, in which the same parts as in FIGS. 1 to 3 are denoted by the same reference numerals, and the explanation thereof will be omitted.

In this embodiment, a thin film or thin plate 6'' made of a magnetic material with high magnetic permeability is cylindrical and covers the abutted rear gear gear 2 of the core half-holes 3 and 4 from the periphery so as to wrap around the rear gear hub 2 to form a rear gap. The magnetic flux in part 2 is short-circuited.

In addition to the embodiments described above, the shape of the magnetic thin film or thin plate can of course be arbitrarily selected as long as the front gap portion 1 is not short-circuited.

Effects As is clear from the above explanation, according to the present invention, the magnetic thin film or thin plate is used to short-circuit the rear gap, so that the magnetic resistance at the rear gap increases. It is possible to provide a magnetic head which prevents a decrease in magnetic recording and reproducing efficiency due to the above-mentioned structure using an inexpensive and simple structure.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a magnetic head showing the conventional structure, Figures 2-
FIG. 4 explains an embodiment according to the present invention, FIG. 2 is a perspective view of the first embodiment of the present invention, and FIG. 3 is a perspective view of the second embodiment of the present invention.
FIG. 4 is a perspective view of a third embodiment of the present invention. 1. Front gap portion 2. Rear gap portion 3.4.
・Core half 5...Winding 8.6', 6'' ・Thin film or thin plate. Patent applicant: Canon Electronics Co., Ltd. Figure 1 Figure 3 Figure 2 Figure 4 Figure 35

Claims (1)

[Claims] In a magnetic head in which a ring-shaped magnetic circuit is formed by abutting two magnetic core halves made of a magnetic material through a front gap part that contacts a magnetic recording medium and a rear gap part opposite to the front gap part, a ring-shaped magnetic circuit is formed. 1. A magnetic head characterized in that part or all of the head is coated with a magnetic thin film or a magnetic thin plate.