JPS61168107A - Magnetic head - Google Patents

Abstract

PURPOSE:To improve magnetic shield effect and to load and unload a disk smoothly by surrounding a magnetic head for floppy disks with a shield plate which has a bevel surface part slanting from a magnetic head support to the top surface of a magnetic head piece. CONSTITUTION:The magnetic head piece 2 and the magnetic shield plate 4 having the bevel part 4a slanting to above the magnetic head piece 2 are fixed to an XY gimbals spring 1 as the magnetic head support by using an adhesive 3, etc. The shield plate 4 uses a magnetic material such as hard 'Permalloy(R)'. Then, when the disk 5 is inserted as shown by an arrow A, the front end of a disk jacket 6 is raised by the bevel part 4a of the plate 4 as shown by an arrow B and guided onto a jacket piece 2 smoothly. Further, when the disk 5 is drawn as shown by an arrow C in unloading, the jacket 6 is raised along the bevel surface and taken out smoothly. Thus, magnetic shielding is attained effectively and the jacket 6, etc., are prevented from being caught by the shield plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic head for a floppy drive device that performs recording and reproduction of flexible magnetic disks.

BACKGROUND OF THE INVENTION FIG. 8 is a perspective view of an xy gimbal type magnetic head that has been commonly used in the past. XY gimbal spring 11
A magnetic head piece 12 is fixed on top. 12&
12b is a magnetic material portion, 12b is a non-magnetic material portion, 120 is a coil, and 12a' is a helad gap. A shielding plate 13 made of permalloy surrounds the magnetic head piece 120 in the shape of a rectangular cylinder and serves to shield external magnetic fields.

The problem that the invention aims to solve However, this conventional example has the following drawbacks.

(1) FIG. 9 is a sectional view of the conventional head shown in FIG. 8. The shape of the shielding plate 13 is a square cylinder;
Furthermore, depending on the amount and position of the adhesive 14 applied to the magnetic head piece 12, the shielding plate 13 cannot be brought sufficiently close to the magnetic head piece 12. Therefore, a gap 15 is created in the upper part of the shielding plate, and the shielding effect of the external magnetic field is reduced.

(2) FIGS. 10 and 11 are views when a floppy disk is inserted and removed from the cross-sectional view of FIG. 9. 1
6 is a magnetic disk, 17 is a disk jacket, and 18 is a head window portion. Giving too much priority to the shielding effect, if the shielding plate 13 is raised to the allowable limit, the first
As shown in Figure 0 and Figure 11, the edge of the jacket 17 and the head window portion 18 are exposed when inserting or removing a disc.
The jacket comes into contact with the shield plate 13, causing deformation of the magnetic disk and the XY gimbal spring.

In fact, some drive devices are equipped with a lift mechanism that lifts up the disk jacket when loading or unloading a floppy disk, but drive devices are rapidly becoming thinner, and the lift mechanism alone is not enough. The current situation is that it is gone.

The present invention seeks to eliminate the above-mentioned drawbacks without losing the shielding effect.

The above-mentioned methods to solve the problem? ;Lf・,') Solving the Problems/This) The magnetic spatula 1' of the present invention has a magnetic head piece for a floppy drive device fixed on a head support 111, and A magnetic baffle plate having a slope portion inclined upwardly of the magnetic head piece is provided to surround the magnetic head piece.

Effect With the above structure, the gap between the upper end of the magnetic barrier plate and the magnetic head piece can be made extremely small, and an excellent magnetic barrier effect can be obtained. This will prevent it from getting caught on the board.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a magnetic head according to an embodiment of the present invention, and FIGS. 2 to 4 respectively show a plan view, a side view, and a side sectional view of a main part of the same magnetic head. In the figure, reference numeral 1 denotes an XY gimbal spring serving as a magnetic head support, and a magnetic head piece 2 for a floppy drive device is fixed to this XY gimbal spring 1 with an adhesive 3 or the like. 4 is a magnetically resistant plate fixed to the gimbal bar 6 benone 1 with adhesive 3, etc.;
This magnetic baffle plate 4 has a sloped surface 4& which is inclined toward two directions of the magnetic piece 2. The angle of inclination of this slope portion 4a with respect to the XY gimbal spring 1 can be selected from various angles, but in this embodiment, it is set to 45°. Further, the material of the magnetic baffle plate 4 is a magnetic material such as hard permalloy.

The operation of the magnetic head/socket of this embodiment constructed in this way will be described next.

(A): When inserting a floppy disk As shown in FIG. 5, when the floppy disk 6 is inserted in the direction of the arrow, the tip 6a of the disk jacket 6
It is raised in the direction of arrow B by the inclined surface 4& of the floppy disk 4 and guided onto the magnetic head piece 2, and as the insertion progresses further, the head window 70 of the floppy disk 5 as shown in FIG. , the magnetic head piece 2 and the magnetic disk 8 come into contact.

(B): When removing a floppy disk 6 pages To remove a floppy disk, move the floppy disk in the direction of arrow C from the state shown in FIG. When the floppy disk 5 is moved in the direction of arrow C, first, the disk jacket 6 disk window end 6b comes into contact with the inclined surface 4a of the baffle plate 4, and the disk window end 6b moves in the direction of the arrow C as shown in FIG. The floppy disk 5 is raised in the upward direction and guided onto the magnetic head piece 2, so that the floppy disk 5 can be taken out without being caught by the magnetic head piece 2.

Next, the effects of this embodiment will be explained.

By forming the sloped portion 4a on the magnetic baffle plate 4, when fixing the magnetic head piece 2 to the gimbal spring 1, there is a wide area where the adhesive 3 can be applied (the area 9 in FIG. 4), and the adhesive can be easily applied. The amount of drugs used is no longer regulated as before.

(11) Furthermore, since the upper end 4b of the shielding plate 4 can be brought into close contact with the magnetic head piece 2, the magnetic shielding effect is enhanced.

(The floppy disk no longer gets caught on the magnetic head piece when inserting or removing the 1111 floppy disk.

Effects of the Invention As has become clear from the above explanation, the magnetic head of the present invention has a shielding plate having a sloped surface inclined toward the upper surface of the magnetic head piece fixed to an XY gimbal spring. The following effects can be achieved by adopting a configuration that surrounds .

(1) Magnetic effect: The gap between the magnetic baffle plate and the magnetic head piece can be reduced. Alternatively, since they can be brought into close contact with each other without any gaps, they have an excellent magnetic barrier effect.

(11) Mechanical effect: The disk jacket does not get caught on the shroud when inserting or removing a floppy disk, improving reliability.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a magnetic head showing an embodiment of the present invention;
Figures 2 and 3 are a plan view and a side view of the magnetic head of the same embodiment, Figure 4 is a sectional side view of the main part of the magnetic head of the same embodiment, and Figures 5 to 7 are when a floppy disk is inserted. 8 is a perspective view of a conventional magnetic head, FIG. 9 is a side view of the same, and FIGS. 10 and 11 are side views showing the state when a floppy disk is inserted and ejected. It is a diagram. 1... Cymbal spring, 2... Magnetic head piece, 3... Adhesive, 4... Shield plate, 4a... Slope portion, 5... ...Floppy disk, 6...Disc jacket, 7...
...Disk window section, 8...Magnetic disk.

Claims (1)

[Claims] a head support, a magnetic head piece fixed to protrude from the head support, and a sloped surface inclined from the head support towards an upper surface of the magnetic head piece and arranged to surround the magnetic head piece. A magnetic head equipped with a shielding plate.