JPH079203Y2 - Magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline of Field] The present invention relates to a structure of a magnetic head used in a magnetic tape recorder, a magnetic card reader and the like, and more particularly to a lead wire drawing structure.

[Contents and problems of conventional technology]

Conventionally, in this type of magnetic head, the lead wire of the coil wound around the magnetic head core is directly soldered to the external connection terminal, or the lead wire and the external connection terminal are connected using an insulating coating lead wire. However, since extra fine wires are used for the coil wire, it is necessary to pay close attention to the handling of the lead wire of the coil. There was a quality problem such as a short circuit. Therefore, great care must be taken when assembling the magnetic head, resulting in poor workability, a large number of man-hours, and poor quality.

[Purpose of device]

An object of the present invention is to provide a magnetic head having a small number of work steps and high quality, which is a magnetic head having a structure that is easy to assemble without disconnection of a lead wire of a coil or a short circuit accident at the time of assembling the magnetic head.

[Constitution of device]

According to the present invention, between the lead wire of the coil wound around the magnetic head core and the external connection terminal, a land connected to the lead wire of one coil and a land having a U-shaped notch connected to the external connection terminal are provided on the other. The two flexible printed circuit boards are connected with printed conductors between them, and the end of the lead wire is connected to the land of the printed circuit board at the core butting surface side for recording / reproducing of the magnetic head. The structure is fixed to the magnetic head core, and the land having the U-shaped notch of the flexible printed board is connected to the external connection terminal.

That is, according to the present invention, the magnetic head cores of a pair of core holders fitted with the magnetic head cores around which the coils are wound are abutted against each other by inserting a magnetic gap material between the abutting surfaces, and the lead wire of the coil is connected to an external connection terminal to be formed. In a ring-type magnetic head, a lead wire connection land is formed between the lead wire of the coil and the external connection terminal by printing a conductor wire and connecting the lead wire to the lead wire at one end, and an external connection terminal connected to the external connection terminal at the other end. The flexible printed circuit board provided with a land for use is superposed on the back surface of the core abutting surface of the magnetic head core, and the coil is flexible with the lead wire connection land facing the back surface of the magnetic head core with the core abutting surface. The lead wire of the wound coil is wound around the printed circuit board and the outer circumference of the magnetic head core, and the core of the magnetic head core is butted. It was allowed to connect the external connection terminal land of the flexible printed circuit board connected to the fixed lead wire connection lands of the flexible printed circuit board on the back surface to the external connection terminal arrangement is a magnetic head according to claim.

[Explanation by Examples]

 An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view of the magnetic head core according to the present invention as viewed from the side opposite to the abutting surface of a wound magnetic head core, FIG. 2 is an external perspective view of a flexible printed circuit board used in the present invention, and FIG. FIG. 3 is a perspective view of a magnetic head core according to the present invention before complete assembly.

In FIG. 1, the two flexible printed circuit boards 5 shown in FIG. 2 are attached to the back surface of the abutting surface of the magnetic head core 1 so that the conductor lines face upward, and the electrical insulating tape 4 is wound on the flexible printed circuit board 5. The coil 2 is wound around the part where it was. The two lead wires 3 drawn from the coil 2 are connected to the lands on one side of the two flexible printed boards 5 respectively.

The flexible printed circuit board 5 of the present invention shown in FIG.
A land 6 for connecting the lead wire of the coil of the magnetic head is provided on one side of the electrically insulating fill, and a terminal land 7 provided with a U-shaped notch for connecting to an external connection terminal is provided on the other side, and the two lands are conductors. It is connected. Therefore, by adopting the lead wire lead-out structure of the magnetic head coil shown in FIG. 1, since the side to be connected to the external connection terminal is flexible, it is not easily cut by handling, and the lead wire of the coil is connected. Since it is also performed on the back surface of the magnetic head abutting surface, it is easy to draw a wire around the magnetic head when assembling, and workability at the time of assembling the magnetic head core is improved. Finally, the magnetic head core 1 in which the coil 2 is wound and the coil lead wire 3 is wire-connected to the coil lead wire land 6 of the flexible printed circuit board 5 is housed in a holder, and the terminal land 7 of the flexible printed circuit board 5 is housed. Is connected to the external connection terminal 9, and the coil 2 and the external connection terminal 9 are connected.
Two flexible printed boards 5 are connected between the two.

The pair of core holders assembled in this manner are inserted into the head with the magnetic gap material 11 abutting against each other and bonded with a resin, and then the magnetic gap portion is polished into an arc shape to complete the magnetic head. The external perspective view is shown in FIG.

[Effect of device]

As described above, the magnetic head according to the present invention has a simple wiring, is easy to assemble, and can supply a highly reliable magnetic head. Further, since the structure is simple, there is an effect that the structure of a narrow track width multi-track magnetic head having a narrow magnetic head circuit width (core width of about 1 to 3 mm) is also possible.

[Brief description of drawings]

FIG. 1 shows a magnetic head core according to the present invention with windings,
FIG. 3 is an external perspective view of the magnetic head core seen from the opposite side. FIG. 2 is a perspective view of a flexible printed circuit board used in the present invention. FIG. 3 is an external perspective view of the magnetic head according to the present invention housed in a holder, butted together and assembled. FIG. 4 is an external perspective view of a magnetic head completed product. 1 ... Magnetic head core. 2 ... coil. 3 ... Lead wire. 4 ... Electrical insulating tape. 5: Flexible printed circuit board. 6 ... Land for coil lead wire. 7: Land for terminals. 8: Holder. 9 ... External connection terminal. 11 …… Magnetic gap material. 12 …… But face.

Claims (1)

[Scope of utility model registration request] 1. A magnetic head core of a pair of core holders fitted with a magnetic head core wound with a coil is abutted against each other by interposing a magnetic gap material between the core abutting surfaces, and the lead wire of the coil is connected to an external connection terminal. In a ring type magnetic head, between the coil lead wire and the external connection terminal, a conductor wire is printed on one end to connect the lead wire to the lead wire, and the other end is connected to the external connection terminal to the external connection terminal. Two flexible printed boards provided with terminal lands are stacked on the back surface of the core abutting surface of the magnetic head core, and the coil is oriented so that the lead wire connecting lands face the back surface of the magnetic head core with the core abutting surface. The flexible printed circuit board is wound around the outer circumference of the magnetic head core, and the lead wire of the wound coil is butted against the core of the magnetic head core. Magnetic head is characterized in that the external connection terminal land connection to a flexible printed circuit board in a fixed said flexible printed circuit board of the lead wire connection lands on the back surface and connected to the external connection terminal arrangement.