JP2989949B2 - Magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head, and more particularly to a magnetic head used for a floppy disk drive.

[0002]

2. Description of the Related Art FIG. 9 is an exploded perspective view of a conventional magnetic head. Magnetic core 3 made of magnetic material (A, B, C)
Are sandwiched between sliders 5a and 5b for improving contact with a medium (not shown). The coils 9a and 9b are attached to the legs of the magnetic core 3, and the back bar 4 made of a magnetic material and the legs of the magnetic core 3 are sandwiched by the pressing spring 6 to close the magnetic circuit, and the gimbal 7 is inserted. It was configured to be installed.

[0003]

The above-mentioned conventional magnetic head has a back bar 4 as shown in FIGS. 6 (a) and 6 (b).
The back bar 4 and the magnetic core leg 3 are sandwiched by the pressing spring 6 and attached to the gimbal 7 in order to stabilize the magnetic circuit coupling between the magnetic core leg 3 and the magnetic core legs 3 (A, B, C). 7 (a) and 7 (b), when the surface of the magnetic core leg 3 is in the same plane as the back bar 4, as shown in FIGS. Although the magnetic circuit coupling with the unit 3 is in a stable state, FIG.
(B) As shown in FIG.
When the surfaces are not in the same plane, the magnetic core leg 3 and the back bar 4
Further, there is a disadvantage that a state where the pressing spring 6 is not completely in contact with the pressing spring 6, that is, a gap is generated, and the magnetic circuit becomes unstable, and ideal recording, reproduction and erasing cannot be performed.

[0004]

According to the present invention, there is provided a magnetic head comprising:
A magnetic core having three legs for recording, reproducing and erasing;
A back bar that is in contact with one side surface of the three legs and forms a magnetic circuit; a first spring that presses the back bar;
A missing portion is provided in the center of the spring, and the other side of the three legs is
A gimbal provided with a second spring for pressing .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of the present invention, and FIG. 2 is a perspective view showing a gimbal of the first embodiment.

In the first embodiment, three magnetic core legs 3a, 3b, 3c for recording, reproducing and erasing,
a, 3b, a back bar 4 constituting a magnetic circuit in contact with one side of 3c, the claw portion 1a for pressing the back bar 4
And a gimbal 2 having a claw portion 1b for pressing the other side surface of the magnetic core legs 3a, 3b, 3c.

FIGS. 4 and 5 are perspective views of the gimbal of the second and third embodiments of the present invention. Magnetic core legs 3a, 3
It is characterized in that a missing portion 1c is provided at the center of the second springs 11b and 21b in contact with b and 3c.

In this case, since the gimbal 2 has the magnetic core legs 3a, 3b, 3c and the pressing springs 1a, 1b that sandwich the back bar 4, the magnetic core legs 3a, 3b
After attaching the coils 9a, 9b to the coils 3b, 3c, and sandwiching the coils 9a, 9b with the pressing springs 1a, 1b provided on the gimbal 2, the magnetic circuit coupling can be stabilized.

Further, as shown in FIGS. 3 (a) and 3 (b),
The magnetic core legs 3a, 3b, 3c and the back bar 4 are pressed by pressing springs 1a, 1b. Magnetic core leg 3
Even when a, 3b and 3c are not in the same plane, the claw portion 1b bends from the location of the lacking portion 1c of the claw portion 1b, and each claw portion 1b acts independently, so that the magnetic core legs 3a, 3b and 3c and the back portion 1c function. The magnetic circuit coupling of the bar 4 is stabilized, and the recording, reproducing and erasing characteristics of the magnetic head can be improved.

In the second and third embodiments shown in FIGS. 4 and 5, a pressing spring 1 having a gimbal 2 with a cutout 1c is provided.
The characteristics can be improved in the same manner as in the first embodiment also in b.

[0011]

As described above, the present invention provides a magnetic core having three legs for recording, reproducing and erasing, a back bar which is in contact with one side of the three legs and forms a magnetic circuit, By having a gimbal provided with a first spring for pressing the bar and a second spring for pressing the other side of the three legs, the workability of mounting the magnetic core and the back bar is excellent, and the magnetic coupling is provided. Becomes stable.

By providing a defective portion in a part of the pressing spring, there is an effect that the magnetic circuit coupling is stabilized and the recording, reproducing and erasing characteristics of the magnetic head are improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing the gimbal of the first embodiment.

FIG. 3 is a side view for explaining the first embodiment.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

FIG. 5 is a perspective view showing a third embodiment of the present invention.

FIG. 6A is a perspective view showing a first conventional magnetic head.
And a side view (b).

FIG. 7A is a perspective view showing a second conventional magnetic head.
And a plan view (b).

FIG. 8A is a perspective view showing a third conventional magnetic head.
And a plan view (b).

FIG. 9 is an exploded perspective view of a conventional magnetic head.

[Explanation of symbols]

 1a, 1b Pressing spring 1c Missing portion 2, 7 Gimbal 3 Magnetic core leg 4 Back bar 5a, 5b Slider

Claims (1)

(57) [Claims] 1. A magnetic core having three legs for recording, reproducing and erasing, a back bar in contact with one side surface of the three legs to form a magnetic circuit, and a first spring for pressing the back bar. And the three legs are provided with a missing portion at the center of the spring.
A gimbal provided with a second spring for pressing the other side surface of the magnetic head.