JPH0479004A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent efficiency for magnetic recording and reproducing from being lowered and to prevent damage to a magnetic recording medium by forming a sliding face with a wear-resistance material around the sliding contact face of a magnetic core to the magnetic recording medium. CONSTITUTION:A sliding face 8a to the medium is formed by ceramic 8 around sliding contact faces 1a and 2a of magnetic cores 1 and 2 to the magnetic recording medium. The faces 1a and 2a on the magnetic head are surrounded by the sliding contact face 8a formed by the ceramic 8 hardly worn in the forward and backward moving directions and right and left sides of the magnetic recording medium, and the magnetic recording medium slid on the magnetic head is supported by this are hardly worn the face 8a. Therefore, the faces 1a and 2a of the magnetic cores 1 and 2 to the magnetic recording medium are hardly worn. Even when they are worn, the amount is a little and the wearing amounts of all the faces 1a, 2a and 8a are almost equal. Therefore, any interval is hardly generated between the magnetic recording medium and the gap part 6 of the magnetic cores 1 and 2. Thus, the efficiency for magnetic recording and reproducing is prevented from being lowered and the damage for the magnetic recording medium is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head for recording and reproducing signals using a magnetic tape, a magnetic cart, or the like as a medium.

(Prior Art) In a magnetic head, since a magnetic recording medium runs in contact with a gap portion of a magnetic core, wear of the magnetic core has conventionally been a problem. This is especially the case with magnetic heads that use magnetic cards.

The magnetic head shown in FIGS. 3 and 4 has a structure that solves these problems and has been used for some time.

As shown in both figures, two parallel contact surfaces 3.4 with the magnetic recording medium are provided on the outside of the magnetic core 1.2 in the track width direction using a wear-resistant material such as metal or ceramic. It is something. In addition, 5 is a coil, 6 is a cap part, 7
is a shield case.

(Problem to be Solved by the Invention) However, in conventional magnetic heads, the wear resistance of the magnetic cores 1 and 2 and the wear resistance of the wear resistant materials such as metals and ceramics forming the sliding surfaces 3.4 are limited. are different, magnetic core 1.2
is more likely to wear out. In addition, the sliding contact surface of the magnetic core 1.2 with the magnetic recording medium is surrounded only on both sides in the track width direction (six arrow directions) by sliding contact surfaces 3.4 that are less likely to wear. Supported by For this reason, the following problems occurred.

(1) The contact surface between the magnetic recording medium and the magnetic core 2 is worn out earlier than the contact surfaces 3 and 4 made of wear-resistant material and is depressed into a groove. A gap is created between the cap part 6 of the second part and the cap part 6 of the second part.

As a result, subasing cross occurs and the efficiency of magnetic recording and reproduction decreases.

(2) Since the amount of wear of the magnetic core 1.2 and the wear-resistant material is different, there is a step difference between the sliding contact surface of the magnetic core 1.2 with the magnetic recording medium and the sliding contact surface 3.4 made of the wear-resistant material. will occur. As a result, the edges of the sliding surfaces 3 and 4 scratch the magnetic recording medium.

(3) The magnetic core 1.2 wears out quickly, and the above (1) and (2)
) problems may occur, resulting in a shortened product life.

The present invention was made to solve these conventional problems, and can prevent a decrease in the efficiency of magnetic recording and reproduction, and can also prevent damage to the magnetic recording medium. At the same time, the objective is to provide a magnetic head with a long product life.

[Means to solve the problem]

The magnetic head provided by the present invention has a sliding contact surface with the magnetic recording medium formed of a wear-resistant material around the surface of the magnetic core that comes into contact with the magnetic recording medium.

(Function) The surface of the magnetic core in contact with the magnetic recording medium in the above-mentioned magnetic head is surrounded by the entire circumference or by the surface in contact with the magnetic recording medium made of wear-resistant material. It is supported by this sliding contact surface that is hard to wear.

As a result, the surface of the magnetic core that comes into contact with the magnetic recording medium hardly wears out, and there is no formation of thin cloth caused by kneading. Also, since the amount of wear on the magnetic core is small,
There is no step between the magnetic core's contact surface with the magnetic recording medium and the wear-resistant material's contact surface with the medium that would damage the medium.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in Ryogoku, the magnetic head of this embodiment has ceramic 8, which is a wear-resistant material, around the sliding contact surfaces la and 2a of the magnetic core 1.2 with the magnetic recording medium. A surface 8a is formed thereon. In addition, in the figure, 5 is a coil, 6 is a gap part, and 7 is a shield case.

In terms of the relationship with the magnetic recording medium, the contact surfaces 1a and 2a of the magnetic head are surrounded by contact surfaces 8a made of ceramic 8, which is hard to wear, on the front, rear, right and left sides in the direction of movement of the medium (in the direction of the arrow). The magnetic recording medium that comes into sliding contact with the magnetic head is supported by this sliding contact surface 8a that is not easily worn.

Therefore, the sliding surface 1 of the magnetic core 1.2 with the magnetic recording medium
a and 2a hardly wear out. Even if the magnetic recording medium and the magnetic core 1
There is almost no gap between the second gap portion 6 and the second gap portion 6. As a result, reduction in efficiency of magnetic recording and reproduction due to subbasing cross is prevented.

Furthermore, even if the contact surfaces 1a and 2a and the contact surface 8a wear out, the amount of wear is very small and will be approximately the same.
There is no difference in level between a, 2a and 8a. Therefore, there is no fear that the magnetic recording medium will be scratched due to the difference in level as in the conventional case.

Furthermore, as described above, since the wear of the sliding surfaces 1a and 2a is effectively suppressed, the life of the magnetic head as a product is extended.

Although ceramic is used as the wear-resistant material in the above embodiment, metal may also be used.

〔Effect of the invention〕

As explained above, according to the present invention, the sliding contact surface of the magnetic core with the magnetic recording medium is provided with a wear-resistant material around the sliding contact surface with the medium, thereby increasing the efficiency of magnetic recording and reproduction. It is possible to prevent the deterioration of the magnetic recording medium, and also to obtain a magnetic head with a long product life without the risk of damaging the magnetic recording medium.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a magnetic head according to an embodiment of the present invention;
2 is a sectional view taken along the line 1--2 in FIG. 1, FIG. 3 is a plan view of a conventional magnetic head, and FIG. 4 is a sectional view taken along the line TV-IV in FIG. 1.2-... Magnetic core la, 2a... Sliding surface of the magnetic core with the magnetic recording medium 6... Cap portion 8... Ceramic A Yago Example t>PIt1 Figure 3

Claims (1)

[Claims] A magnetic head characterized in that a sliding contact surface with a magnetic recording medium is formed of a wear-resistant material around the sliding contact surface of the magnetic core with the magnetic recording medium.