JPH11110726A - Magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize reduction of cost and weight through simplification of a base manufacturing process by forming a head with the base formed of a synthetic resin material to be fitted to a rotating metal cylinder and a core to be fixed to the base and then forming a conductive plated layer to leak the accumulated static electricity to a part of the base. SOLUTION: A base 3 is formed of a synthetic resin material and a plated layer 4 is formed only to the bottom surface of base to fix a core 2 in the lowest price. For the plated layer 4, a low cost and highly conductive aluminum or nickel material is used. A problem of static electricity can be solved even when a metal material is not used for the base 3 by leaking the static electricity accumulated to the core 2 to a cylinder via this plated layer 4. Thereby, the base 3 can be formed of synthetic resin material, eliminating the punching process and polishing process which are required for metal material and a large amount of base 3 can be produced depending on the accuracy using the die for resin molding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a magnetic head used in a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art A magnetic head used in a video recording / reproducing apparatus is mounted on a rotating metal cylinder (drum). As shown in FIG. 2, a conventional magnetic head of this type includes a base 1 attached to the cylinder and a core 2 fixed to the base 1, and a coil (not shown) is wound around the core 2. .

Since the core 2 slides on the magnetic tape, static electricity is easily generated. Therefore, the base 1 is made of a conductive metal material, and the static electricity on the core 2 is released to the cylinder via the base 1.

[0004]

In order to release the static electricity on the core 2 to form the base 1 with a metal material, a process such as punching and polishing of the material metal of the base 1 is required, resulting in high cost. Become. Further, there is a limit in reducing the weight of the magnetic head. These are the problems to be solved by the present invention.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head which uses a synthetic resin material which can be molded for a base portion and which is reduced in cost and weight due to simplification of a manufacturing process.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a base formed of a synthetic resin material, a conductive plating layer formed on at least a part of the base, This can be achieved by a magnetic head including a core fixed to the base.

According to the embodiment of the present invention, the plating layer may be formed on the entire surface of the base, but is most inexpensively formed only on the bottom surface of the base for fixing the core. And in the plating layer,
An inexpensive and highly conductive aluminum or nickel material is used.

[0008] If the base is formed of a synthetic resin material, a punching process and a polishing process like a metal material are not required,
If a mold for resin molding is made, a large number of bases corresponding to the precision will be reproduced. Since ordinary synthetic resin has low conductivity (high insulation), in the present invention, the entire resin material base,
Alternatively, a conductive plating layer is partially formed, and static electricity accumulated in the core flows to the cylinder through the plating layer. This can solve the problem of static electricity without using a metal material for the base.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments shown in the drawings. FIG. 1 is a perspective view of a magnetic head showing one embodiment of the present invention. In the figure, reference numeral 3 denotes a base formed of a synthetic resin material, 4 denotes a conductive plating layer formed on at least a part of the base 3, and 2 denotes a core which is in contact with the plating layer 4 and fixed to the base 3. is there.
A coil (not shown) is wound around the core 2.

The plating layer 4 may be formed on the entire surface of the base 3, but is formed at the lowest cost only on the bottom surface of the base for fixing the core 2. For the plating layer 4, an inexpensive and highly conductive aluminum or nickel material is used.

If the base 3 is formed of a synthetic resin material as in the present invention, a punching step and a polishing step such as those of a metal material are not required. The bass is reproduced in large quantities.

Since ordinary synthetic resin has low conductivity (high insulation), in the present invention, a conductive plating layer 4 is formed on the whole or a part of the resin base 3, and this plating layer 4 is formed. The static electricity accumulated in the core 2 is flowed to the cylinder via the. In this way, the problem of static electricity can be solved without using a metal material for the base 3.

[0013]

As described above, according to the present invention, since a synthetic resin material is used for the base, a punching step and a polishing step such as a metal material are not required. , A large number of basses corresponding to the accuracy are reproduced. In addition, in the present invention, a conductive plating layer is formed on the entire or a part of the base of the resin material, and the static electricity accumulated in the core is caused to flow to the cylinder through the plating layer. The problem of static electricity can be solved without using any. Therefore, according to the present invention, it is possible to provide a magnetic head that uses a synthetic resin material that can be molded for the base portion and that achieves cost reduction and weight reduction due to simplification of the manufacturing process.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic head showing one embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a conventional magnetic head using a metal base.

[Explanation of symbols]

 2 Core 3 Base of synthetic resin material 4 Conductive plating layer

Claims (3)

[Claims] 1. A base molded from a synthetic resin material, a conductive plating layer formed on at least a part of the base, and a core fixed to the base in contact with the plating layer. A magnetic head comprising: 2. The magnetic head according to claim 1, wherein the plating layer is formed on a bottom surface of the base for fixing the core. 3. The magnetic head according to claim 1, wherein the plating layer is made of aluminum or nickel.