JPS59142733A - Magnetic head - Google Patents

Abstract

PURPOSE:To allow a magnetic head to contact a magnetic disk stably, to eliminate damages to the magnetic disk, and to stabilize output characteristics by providing a wiring part on an elastic plate. CONSTITUTION:The elastic plate shown by 20 in a figure is formed of Be-Cu copper alloy, stainless steel, etc., to an about 50mum thickness, the surface is coated with an insulating material such as polyester and polyimide, and the printed wiring part 21 is formed thereupon. A coil 15 for generating an erasing magnetic field is fitted around front-core half bodies 10a and 11a projecting from an opening part and a spacer 12a. A coil 19 for generating a reproducing magnetic field is fitted around a front-core half body 18b and spacers 12b and 12c. Lastly, end parts 15a and 15b of the coil 15 and end parts 19a-19c of the coil 19 are soldered to specific connection parts 21a of the printed wiring part 21 formed on the elastic plate 20.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a magnetic head, and more particularly to a magnetic head that records and reproduces information by holding a magnetic recording medium between two magnetic heads.

In conventional magnetic disk drives, a magnetic disk as a magnetic recording medium is sandwiched between two magnetic heads to record and reproduce information.
It has become.

The arrangement structure of a conventional magnetic head of this type is shown in FIGS. 1 and 2.

In both figures, the reference numeral 1 indicates a magnetic disk, and in the illustrated example, a protective cover for the magnetic disk is omitted to simplify the explanation.

The magnetic disk 1 has a circular opening 1a in the center thereof, and is rotated in the direction of the arrow 2 by the rotation of a rotating shaft of a driving means (not shown) fitted in the opening 1a.

A magnetic head 3 is arranged on the lower surface side of the magnetic disk 1, and a magnetic head 6 provided on the lower surface of the tip of the arm 5 is arranged on the upper surface side, and each magnetic head is used when recording or reproducing information. The magnetic gap 4 formed in the magnetic gap 4 moves over the surface of the magnetic disk 1 so as to contact each surface of the magnetic disk 1.

Information is recorded, reproduced, and erased on a track 3a formed on the magnetic disk 1 by contact of the magnetic gap 4 of the magnetic head 3, and on a track 6a formed by contact of the magnetic gap on the magnetic head 6 side.

Tracks 3a and 6a are not opposed to each other, and tracks 3a and 5a are formed with a track distance between them. FIG. 2 shows a detailed structure of the magnetic heads 3 and 6 that contact the magnetic disk 1, as viewed from the direction of arrow 8 in FIG.

A magnetic head 6 that contacts the upper surface of the magnetic disk 1 is attached to an elastic plate 9 made of copper alloy or stainless steel, and one end of this elastic plate 9 is fixed to the arm 5. The magnetic head 6 has a front core half 10a11a sandwiching a spacer 1'2a, which is inserted through an elastic plate 9, and the part protruding from the bottom side of the elastic plate 9 is a mask fixed to the elastic plate 9. It is sandwiched by blocks 13 and 14.

A front core half 10a protruding from the upper surface side of the elastic plate 9;
A coil 15 is attached to the section lla, and the end of the coil 15 is soldered to a contact pattern 17a formed on a flexible printed circuit board 16 whose one end is fixed on the elastic plate 9.

A recess 14a is formed in a portion of the mask block 14 adjacent to the front core lla, and the mask block 14 presses the magnetic disk 1 downward j in the portion excluding the recess 14a. A magnetic gap 4 of the magnetic head 3 is arranged at a position facing this pressed portion, and a track 3a is formed here.

The magnetic head 3 disposed in contact with the right side of the magnetic disk 1 on the lower side is provided with a front core and a coil (not shown) housed in a case 3b.

4. A magnetic gap 4 is located at a position slightly to the right in FIG. 2 from the center of the flat upper surface of the magnetic head 3.

In addition, the mask block located on the left side of the magnetic head 3 in FIG. 2 faces a magnetic gap (not shown) of the magnetic head 6, and presses the magnetic disk 1 upward.
In this part, a track 6a is formed on the upper surface of the magnetic disk 1.
is formed.

By the way, when the above structure is adopted, as shown in FIG. 3, the magnetic head 6 often hits the magnetic disk 1 obliquely due to the flexible printed circuit board 16, which damages the magnetic disk 1 and prevents recording and reproduction. Otherwise, the contact between the magnetic disk 1 and the magnetic head 6 becomes poor, and the output characteristics become unstable.

If the position of the magnetic head 6 is changed by bending the flexible printed circuit board 16 in order to adjust this, a large amount of time is required for the adjustment work, and if repeated many times, the flexible printed circuit board may break. there were.

Purpose The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology.The present invention is designed to stabilize the contact between the magnetic head and the magnetic disk, thereby preventing damage to the magnetic disk and stabilizing the output characteristics. The objective is to provide a magnetic head with

EXAMPLES Hereinafter, the present invention will be explained in detail based on examples shown in the drawings.

4 to 6 illustrate an embodiment of the present invention,
In the drawings, the same or corresponding parts as in FIGS. 1 to 3 are denoted by the same reference numerals, and the explanation thereof will be omitted.

In each figure, the reference numeral 20 is an elastic plate, which is made of copper alloy such as Be-Cu or stainless steel and has a thickness of about 501 ttn, and an insulating material such as polyester or polyimide is coated on its surface. , a printed wiring section 21 is formed thereon.

An opening 20a for holding the core is formed in the elastic plate 20, and the core half 10a, Hlblla, llb,
18a, 18b and spacers 128-12C are fitted into the opening 20a from the direction of the arrow C in FIG.

Furthermore, the front core half IQ protruding from the opening 20a
A coil 15 for generating an erasing magnetic field is fitted into a, lla and a spacer 12a.

Furthermore, a back core 1 formed in an L shape from ferrite
0 to the front core half 10a, lla and spacer 12
a and the side surfaces of the front core halves 10b, llb, and 113a protruding from the opening 20a and fixed. Then, the front core half 18b and the spacer 12b,
Recorded on 12C.

A coil 19 for generating a reproduction magnetic field is fitted, and then a back core 18 formed from ferrite into a rectangular plate shape is fixed in contact with the side surfaces of the front core halves 18a and 18b.

And finally, the ends 15a and 15b of the coil 15
The end portions 19a to 19C of the coil 19 are connected by soldering to a predetermined connection portion 21a of a printed wiring portion 21 formed on an elastic plate 2°.

After assembling in this way, one end of the elastic plate 2o is fixed to the arm side, and then the connecting portion 2 formed on the elastic plate 2o is
An external connection lead wire 22 is soldered to 1b.

It should be noted that the elastic plate 20 may be made of a metal material only in the part that is fixed to the arm, and the other parts may be made of an insulating material such as polyester or polyimide.

Since this embodiment is configured as described above, a flexible printed circuit board as in the conventional structure is not required.

Therefore, the elasticity of the flexible printed circuit board does not prevent the magnetic head from hitting the magnetic disk, and the magnetic head can stably contact the magnetic disk without tilting.

In addition, there is no need to bend the flexible printed circuit board to adjust the contact of the magnetic head.

A magnetic head that is easy to construct and has stable output characteristics can be obtained, and the magnetic disk will not be damaged.

Effects As is clear from the above explanation, according to the present invention, a structure is adopted in which the wiring section is provided directly on the elastic plate that supports the magnetic head, so that the magnetic head side is not connected to the 7-six (7-6) - The magnetic head stably contacts the magnetic disk without being affected by the elasticity of the printed circuit board, resulting in stable output characteristics and no damage to the magnetic disk.

[Brief explanation of the drawing]

1 to 3 explain the conventional structure, FIG. 1 is a perspective view illustrating the arrangement of the magnetic head, and FIG. 2 is a part of the present invention shown in FIG. This is to explain an embodiment, and FIG. 4 shows a bullet. 1... Magnetic disk 3, 6... Magnetic head 5
... 7-mu 9, 20... Elastic plate 21... Printed wiring section Fig. 1 0 Fig. 2 3b 6a14a 3a

Claims (1)

[Claims] A magnetic head is provided on the free end side of an elastic plate, and this magnetic head is brought into sliding contact with a magnetic recording medium to record information. A magnetic head that performs reproduction, characterized in that a wiring section is provided on the elastic plate.