JPS5934236Y2 - Coil winding core for pickup truck - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coil winding for a pickup cartridge, and is intended to easily insulate a coil winding core made of a magnetic material.

For example, when configuring a moving coil type vibrator, an iron core made of magnetic material is usually used for the coil winding core, but the surface of the iron core is not insulated to prevent short circuits with the coil being wound. Must be.

Insulating methods include coating the surface with an insulating material or pasting insulating tape, but the production process is complicated and tends to be incomplete, resulting in weak insulation effects. .

The present invention was proposed to solve these problems, and is a coil winding method that requires a simple process and can be expected to have a perfect insulation effect. The opening has a hole for inserting a cantilever in the center of the front surface, and a flat cylindrical point body made of an insulating material has a shape that fits the rectangular parallelepiped space and does not protrude from the surface of the opening for inserting a cantilever in the center. It has a structure in which a magnetic body having a hole is fitted.

Hereinafter, an embodiment will be explained according to the drawings.A coil winding core is constructed by fitting a magnetic body 5 made of an insulating material into a cylindrical rectangular parallelepiped 1 through one opening 2 of the cylindrical rectangular parallelepiped 1. A coil 7 is wound on top.

However, as shown in FIG. 2, the magnetic body 5 has a shape that does not protrude beyond the cylindrical rectangular parallelepiped, that is, the length is shorter than the length connecting the openings, so that the coil 7 can be placed on the cylindrical rectangular parallelepiped 1.
Even if it is rolled up, it does not come into contact with the magnetic material 5 inside.

As shown in FIG. 3, when the front and back surfaces of the cylindrical rectangular parallelepiped 1 are configured as openings and the magnetic body 5 is fitted therein, the magnetic body 5 may of course be constructed in the same manner.

FIG. 4 shows a vibrating body in which the coil 7 is wound around the coil core constructed in this way, and the cantilever 8 is inserted and fixed.

It goes without saying that the cylindrical rectangular parallelepiped 1 may be constructed using any insulating material such as aluminum whose surface is anodized to a thickness of 0.05 mm or less.

As described above, according to the present invention, it is possible to provide a coil-wound core that can be easily produced and can be expected to have sufficient insulation effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the cylindrical rectangular parallelepiped and the magnetic body before fitting. FIG. 2 is a central vertical sectional view of the coil winding core. FIG. 3 is a central vertical sectional view of a coil winding core according to another embodiment. FIG. 4 is a longitudinal sectional view of the vibrating body. In the figure, 1: cylindrical rectangular parallelepiped, 2: opening, 3: cantilever insertion hole, 4: front section, 5: magnetic material, 6: cantilever insertion hole, 7: coil, 8: cantilever.

Claims (1)

[Scope of utility model registration request] A flat cylindrical rectangular parallelepiped made of insulating material with two openings on the same direction side and a cantilever insertion hole in the center of the front, which fits into the rectangular parallelepiped space and does not protrude beyond the surface of the opening. A coil winding core for a pickup cartridge, characterized in that a magnetic body having a shape with a cantilever insertion hole in the center is fitted.