JPH0320908Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic head for a floppy disk.

[Prior art]

Conventionally, a magnetic head for magnetically recording and reproducing information signals on a floppy disk has a core 2 of a magnetic head 5 protruding from a through hole of a gimbal spring 1, as shown in FIG.
The coil 3 was inserted through the gimbal spring 1, but the insulation between the coil 3 and the gimbal spring 1 is maintained only by the coil's insulation material, so the degree of insulation is low, and the insulation is easily broken when an abnormal load is applied. It was hot.
On the other hand, it is conceivable to wind the coil around a bobbin and insert it into the magnetic head core, but this method increases the degree of insulation but brings about new drawbacks, such as not being able to downsize and increasing costs.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention proposes a magnetic head for a floppy disk that has a simple structure in which an insulating layer is applied around the through hole through which the magnetic head core of the gimbal spring protrudes, increasing the degree of insulation between the coil and the gimbal spring. That's true.

[Structure of the idea]

In this invention, an insulating layer is applied around the through hole provided in the gimbal spring through which the magnetic head core protrudes.
The coil is inserted through the magnetic head core which projects from the through hole on the side of the insulating layer.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments. As shown in FIGS. 1 to 3, the magnetic head for a floppy disk has a through hole 2 formed in a gimbal spring 1 by chemical etching, and one side of the through hole 2 on which the coil 3 is placed. An insulating layer 4 is formed on the upper peripheral portion by a printing method. The core of the magnetic head 5 is inserted into the through hole 2, and the coil 3 is inserted into the protruding magnetic head core, and the end wire 3a of the coil 3 is connected to a flexible printed circuit board 6 fixed to the gimbal spring 1. .

The gimbal spring 1 is formed by chemically etching a plurality of through holes 2 simultaneously in a thin large material plate. Then, the insulating layer 4 is formed by printing in a state in which a plurality of insulating layers 4 are connected.
Synthetic resin materials and rubber materials are used.

As shown in FIG. 4, the magnetic head 5 includes recording/reproducing cores 8, 9 made of ferrite material or the like having a recording/reproducing gap 7, and a magnetic disk (not shown) on which information is recorded by the recording/reproducing gap 7. A magnetic head chip is formed by erase cores 12, 13, 14, 15 made of ferrite material or the like and having a pair of erase gaps 10, 11 for erasing both sides of a recording track, and ceramic spacers 16, 17, 18. , and a wide slider 19 and a narrow slider 20 made of ceramic material on both sides.
It is sandwiched between the two to form a rectangular body. The recording/reproducing and erasing coils 3 and 3 are connected to cores 9 and 1, respectively.
3 and 15, and back cores 21 and 22 are fixed thereto, respectively, as shown in FIG.

When the magnetic head for a floppy disk is configured as described above, the insulation between the gimbal spring 1 and the coil 3 is provided via the insulating layer 4, so the degree of insulation is high, and the coil 3 is free from abnormalities. The insulation will not break down even under load. Furthermore, since the insulating layer 4 can be formed by printing a plurality of gimbal springs 1 connected together, the cost can be reduced. Furthermore, since there is no need to use a bobbin and insulation can be achieved with a thin insulating layer, the size can be reduced.

In FIG. 3, the insulating layer 4 is formed only on the coil 3 portion of the gimbal spring 1, but the insulating layer may be formed so that the coil end wire 3a rests on the insulating layer 4 as shown in FIG.

[Effect of idea]

In this invention, as mentioned above, the insulation between the gimbal spring and the coil is achieved by applying an insulating layer around the through hole from which the magnetic head core protrudes, so that the insulation is reliable, and even if an abnormal load is applied to the coil, the insulation will not break down. It is an object of the present invention to provide a magnetic head for a floppy disk, which has excellent practical effects such as being easy to manufacture and reducing costs because the insulating layer is printed and formed, and can be miniaturized because it can be insulated with a thin insulating layer. I can do it.

[Brief explanation of drawings]

The drawings show a magnetic head for a floppy disk according to the present invention, FIG. 1 is a partially exploded external perspective view of the magnetic head for a floppy disk, and FIG. 2 is a plan view of a gimbal spring on which an insulating layer is formed. Fig. 3 is a side view of a magnetic head for a floppy disk, Fig. 4 is an external perspective view of the gap side of the magnetic head, Fig. 5 is a side view of a modified example, and Fig. 6 is a magnetic head mounted on a conventional gimbal spring. FIG. 3 is a fixed side view. 1... Gimbal spring, 2... Through hole, 3... Coil, 4... Insulating layer, 5... Magnetic head, 8,
9, 13, 15...Magnetic head core.

Claims (1)

[Scope of utility model registration request] An insulating layer is provided around a through hole provided in a gimbal spring through which a magnetic head core projects, and a coil is inserted through the magnetic head core that projects from the through hole on the side of the insulating layer. Magnetic head for PID.