JPH0845211A - Flying magnetic head - Google Patents

Abstract

(57) [Summary] [Purpose] Do not prevent the displacement of the slider. [Structure] Slider 28 of flexure 40 as a holding portion
An adhesive portion 44 for adhering to is connected to the displacement portion 42 via a stepped portion 43 having a predetermined height H. The stepped portion 43 is integrally formed with the displacement portion 42 by, for example, drawing. In this flying type magnetic head 14, the step between the adhesive portion 44 and the displacement portion 42 and the fixed portion 41 can be made sufficiently large, so that when the rotational force acts on the slider 28, the slider 2
8 can be freely displaced in all directions without interfering with the fixed portion 41 and the displacement portion 42. Accordingly, since the magneto-optical disk having a large surface wobbling is faithfully followed, it is possible to prevent the disk from being scratched and improve the reliability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating magnetic head suitable for application to hard disks, magneto-optical disk devices and the like.

[0002]

2. Description of the Related Art In rewritable hard disks, magneto-optical disk devices, etc., floating magnetic heads have come to be used in order to improve reliability. Figure 5
Shows the configuration of a general magneto-optical disk device 1. The figure shows a state in which the cabinet is removed. The magneto-optical disk device 1 includes a rewritable magneto-optical disk 11
Is driven to rotate by the spindle motor 12. An optical pickup 13 is arranged on the lower surface side of the magneto-optical disk 11,
A floating magnetic head 14 is arranged on the upper surface side.

Optical pickup 13 and floating magnetic head 1
4 is attached to the moving unit 15, and the moving unit 15 is attached to the movable unit 17 of the linear motor 16. As a result, the optical pickup 13 and the floating magnetic head 1
4 moves linearly along the radial direction of the magneto-optical disk 11. The light emitted from the optical system block 18 is transmitted to the movable portion 1 by the optical pickup 13.
It is supplied via the prism 19 in the inside 7. Further, the light reflected by the magneto-optical disk 11 is received by the optical system block 18 via the optical pickup 13 and the prism 19. The spindle motor 12, the linear motor 16, and the optical system block 18 are fixed on the chassis 20.

FIG. 6 is a perspective view of a floating magnetic head 14 having a flexure 24 as a cantilever spring type holding portion. The magnetic head 14 has a moving part 15 (FIG. 5).
A load beam 22 as an elastic arm is provided at the tip of the attachment portion 21 attached to the. An opening 23 is provided on the root side of the load beam 22, and the spring constant of the load beam 22 is appropriately set by this.
A flexure 24 is fixed to the tip of the load beam 22 by spot welding, for example, and a slider 28 is bonded to the lower side thereof. A magnetic pole 29 is fitted in the slider 28, and the magnetic field generated from the magnetic pole 29 changes the direction of the magnetic recording material applied to the magneto-optical disk 11 to record or erase information.

In the cantilever spring type flexure 24, one side of a fixed portion 25 is fixed to the load beam 22 as shown in FIG. In addition, the displacement portion 27 is cut out by cutting out three sides in an appropriate width and length range set in the central portion of the fixed portion 25.
Is provided, and one end side thereof, in this example, the tip on the inner peripheral side of the disk 11 is connected to the fixing portion 25 at the rising portion 30.
That is, the displacement portion 27 is a cantilevered leaf spring. The flexure 24 is made of, for example, stainless steel so as to be thin, and the displacement portion 27 is formed to have a predetermined spring constant. An adhesive portion 27A is provided in a predetermined range of the displacement portion 27, that is, a size of length L × width B in this example, and a slider 28 is attached thereto. Furthermore, the displacement portion 27
As shown in FIG. 8 (A), an emboss 31 projecting toward the load beam 22 is provided substantially at the center. The emboss 31 is in contact with the plate surface of the load beam 22, and serves as a pivot when the slider 28 floats by receiving the air that moves as the disk 11 rotates. This stabilizes the flying characteristics of the slider 28. And
The buoyancy F of the slider 28 is transmitted to the load beam 22 via the emboss 31, and the funnel beam 22 follows this and is displaced up and down.

Some flying type magnetic heads 14 are provided with a double-supported spring type flexure 32 as shown in FIG. In this case, the flexure 32 is integrally formed at the tip of the load beam 22. A displacement portion 33 is provided at the center of the flexure 32, and the adhesive portion 3 on the lower surface thereof is provided.
The slider 28 is adhered to 3A. Both sides of the displacement portion 33 are connected to the ring-shaped frame portion 35 by hinge portions 34A and 34B. The frame portion 35 includes hinge portions 34A and 34B.
Both sides orthogonal to the hinges 34C, 34D and the lower part 3
It is connected to the load beam 22 via 7. That is, here, the displacement portion 33 is a double-supported beam. As shown in FIG.
It is arranged with a step downward from the base 36 of
It is formed to be thinner than the frame portion 35 by half etching or the like, and when receiving the buoyancy F of the slider 28, the hinge 34A
Displacement is about 34D as a fulcrum.

[0007]

In the floating magnetic head 14 (FIG. 6) described above, the slider 28 can be freely displaced in all directions, as shown in FIG.
As shown in FIG. 10A or FIG. 10A, the adhesive portions 27A and 33A of the slider 28 are formed lower than the other portions. In particular, when a disk having a large surface wobble like the magneto-optical disk 11 is used, in order to improve the reliability, the adhesive portions 27A, 33A and other parts so that the slider 28 faithfully follows the irregularities of the magneto-optical disk 11. Partial clear run α
Needs to be increased.

Therefore, the cantilever spring type flexure 24
In the flying magnetic head 14 having the structure shown in FIG.
As also shown, the displacement portion 27 of the flexure 24 is lower than the fixed portion 25 at the rising portion 30. However, in this case, the adhesive portion 27 for adhering the slider 28 is used.
Since A is at the same height as the other portion of the displacement portion 27, when a force G that rotates counterclockwise in FIG. 8B acts on the slider 28, the slider 28 interferes with the displacement portion 27 and the portion a. However, there is a problem that the rotation of the slider 28 is hindered.

In this case, the slider 28 cannot follow the irregularities of the magneto-optical disk 11, so that the slider 28 may collide with and scratch the magneto-optical disk 11.
Furthermore, there is a problem in that the adhesive applied to the adhesive portion 27A sticks out to other portions and is solidified, and the spring constant changes.

Further, in the floating magnetic head 14 having the double-ended spring type flexure 32 as shown in FIG. 9, as shown in FIG. 10B, the adhesive portion 33A and the frame portion 3 are also provided.
5, because a step is provided between the adhesive portion 3 and another portion.
Half-etching is performed leaving 3A to reduce the thickness of other portions. However, when a step is formed by half-etching in this way, the difference in height between the adhesive portion 33A and other portions such as the frame portion 35 cannot be increased so much, so that the slider 28 is rotated clockwise or counterclockwise. When the force G is applied, the slider 28 interferes with the frame portion 35 at the portion b, which also hinders the rotation of the slider 28. In this case as well, the magneto-optical disk 11 may be scratched as described above.

Therefore, the present invention solves the above-mentioned problems, and proposes a floating magnetic head capable of reliably preventing the displacement of the slider from being hindered.

[0012]

In order to solve the above-mentioned problems, in the present invention, an arm slidably arranged in the radial direction of the disk and a tip end of the arm are arranged.
In a flying magnetic head having a slider that receives air moving as the disk rotates and floats, a magnetic pole attached to the slider, and a holding portion for movably attaching the slider to an arm, the flying magnetic head is displaced to the holding portion. A flexible displacement part is provided, an adhesive part for adhering the slider is provided on a part of the displacement part, and a step is provided between the adhesive part and the other part of the displacement part. is there.

[0013]

As shown in FIG. 1, an adhesive portion 44 for adhering the slider 28 provided on the flexure 40 as a holding portion.
Are connected to the displacement portion 42 via a stepped portion 43 having a predetermined height H. The stepped portion 43 is integrally formed with the displacement portion 42 by, for example, drawing. In this flying type magnetic head 14, as shown in FIG. 2, the steps between the adhesive portion 44 and the displacement portion 42 and the fixed portion 41 can be made sufficiently large, so that even if the rotational force G acts on the slider 28, the slider 2
8 can be freely displaced in all directions without interfering with the fixed portion 41 and the displacement portion 42. Therefore, since the magneto-optical disk 11 having a large surface wobbling is faithfully followed, it is possible to prevent the magneto-optical disk 11 from being scratched and improve the reliability.

[0014]

Embodiments of the floating magnetic head according to the present invention will now be described in detail with reference to the drawings. In addition,
The same portions as those described above are denoted by the same reference numerals, and detailed description is omitted.

FIG. 1 shows a floating magnetic head 1 according to the present invention.
FIG. 4 shows a perspective view of 4 from the lower side. This figure particularly shows the structure of the flexure 40 as a holding portion. The floating magnetic head 14 is, for example, the magneto-optical disk device 1 (FIG. 5).
Applied to the load beam 22 as an arm
A cantilever spring type flexure 40 is arranged at the tip of the. In the flexure 40, one side of a rectangular fixing portion 41 is fixed to the base portion 36 of the load beam 22 by spot welding or the like. At the center of the fixed portion 41, a displacement portion 42 and an adhesive portion 44 that are cut out on three sides are provided. Displacement part 4
2 has an appropriate spring constant.

A stepped portion 43 having a predetermined height H is provided at the tip of the displacement portion 42 by drawing or the like, and an adhesive portion 44 parallel to the base portion 36 is provided from the lower end thereof. An emboss 45 that abuts the base 36 is provided at the center of the adhesive portion 44. The slider 28 is bonded to the bonding portion 44. The magnetic pole 29 (FIG. 6) is fitted into the slider 28 at an appropriate position.

In the floating magnetic head 14, as shown in FIG. 2, the adhesive portion 44, the fixed portion 41, and the displacement portion 42.
Since the step H between the slider 28 and the slider 28 can be made sufficiently large, the end portion of the slider 28 can be freely displaced without interfering with the fixed portion 41 and the displacement portion 42 when the rotational force G acts on the slider 28. Become. Therefore, it is possible to surely prevent the slider 28 from colliding with a disk having large surface wobbling such as the magneto-optical disk 11 (FIG. 5) and damaging the disk. In addition, since the adhesive portion 44 is clearly separated from the fixed portion 41 and the displacement portion 42, the adhesive does not stick out and adhere to the portion other than the adhesive portion 44, so that the spring constant of each portion of the flexure 40 changes. It never happens.

FIG. 3 is a perspective view of a floating magnetic head 50 having a double-sided flexure 51 to which the present invention is applied, as viewed from below. In the floating magnetic head 50, the tip of the base 36 of the load beam 22 is cut out in a ring shape to provide a frame 52 of a flexure 51, which is connected to the base 36 by hinges 53A and 53B. A rectangular displacement portion 54 is provided inside the frame portion 52, and this is connected to the frame portion 52 by hinges 53C and 53D via stepped portions 55 on both sides. The stepped portion 55 is formed to have a predetermined height H by, for example, drawing, so that a step having a sufficient height is provided between the displacement portion 54 and the frame portion 52 and the base portion 36. The adhesive portion 5 is provided on the lower surface of the displacement portion 54.
6 is provided, and the slider 28 is adhered thereto.

In this flying type magnetic head 50, as shown in FIG. 4, the adhesive portion 56, and hence the displacement portion 54 and the base portion 3 are provided.
Since the step H between the slider 28 and 6 is sufficiently large, when the rotational force G acts on the slider 28, the slider 28 can be freely displaced without interfering with the base 36. As a result, it is possible to reliably prevent the magneto-optical disk 11 from being scratched by the slider 28 faithfully following the magneto-optical disk 11 having a large surface wobbling.

As shown in FIG. 1 or 3, if the stepped portions 43 and 55 are formed by bending, the rigidity of the stepped portions 43 and 55 can be increased. In the floating magnetic head 50 of FIG. 3, the flexure 51 is integrally formed with the load beam 22, but the present invention can be applied to the case where the flexure 51 is separate from the load beam 22. is there.

[0021]

As described above, according to the present invention, the arm slidably arranged in the radial direction of the disk and the arm arranged at the tip of the arm and receiving the air that moves as the disk rotates, levitates. In a flying magnetic head having a slider, a magnetic pole attached to the slider, and a holding portion for movably attaching the slider to an arm, the holding portion is provided with a displaceable displacement portion, and a part of the displacement portion is provided. An adhesive portion for adhering the slider is provided, and a step is provided between the adhesive portion and the other portion of the displacement portion.

Therefore, according to the present invention, it is possible to provide a sufficient step between the adhesive portion of the holding portion for adhering the slider and the other portion, so that the slider does not interfere with the other portion. It is possible to freely displace in all directions. As a result, the slider can follow the disc faithfully, and it is possible to reliably prevent the disc from being scratched and improve the reliability. Moreover, since the adhesive does not stick out from the adhesive portion and adhere to other portions, it is possible to maintain the spring constant of the holding portion at a predetermined value.

[Brief description of drawings]

FIG. 1 is a perspective view of a floating magnetic head 14 according to the present invention as viewed from below.

FIG. 2 is a sectional view taken along line EE of FIG.

FIG. 3 is a perspective view of a floating magnetic head 50 according to another embodiment as viewed from below.

4 is a sectional view taken along line FF of FIG.

FIG. 5 is a configuration diagram of a general magneto-optical disk device 1.

FIG. 6 is a configuration diagram of a conventional floating magnetic head 14.

FIG. 7 is a configuration diagram of a conventional cantilever spring type flexure 24.

FIG. 8 is a view showing an interference portion a of a slider 28 in a conventional cantilever spring type flexure 24.

FIG. 9 is a configuration diagram of a conventional double-ended spring type flexure 32.

FIG. 10 is a view showing an interference part b of a slider in a conventional double-ended spring type flexure 32.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magneto-optical disk device 11 Magneto-optical disk 13 Optical pickup 14,50 Floating type magnetic head 15 Moving part 22 Load beam 29 Magnetic poles 40,51 Flexure 41 Fixing part 42,54 Displacement part 43,55 Step part 44,56 Adhesive part

Claims (3)

[Claims] 1. An arm slidably arranged in a radial direction of a disk, a slider arranged at a tip of the arm and flying by receiving air moving as the disk rotates, and a slider attached to the slider. In a flying magnetic head having a magnetic pole and a holding portion for movably attaching the slider to the arm, a displacing displacing portion is provided in the holding portion, and the slider is provided in a part of the displacing portion. A flying type magnetic head, characterized in that an adhesive portion for adhering is provided, and a step is provided between the adhesive portion and another portion of the displacement portion. 2. The flying magnetic head according to claim 1, wherein the holding portion is a cantilever spring type, and the adhesive portion is integrally formed with the displacement portion. 3. The floating magnetic head according to claim 1, wherein the holding portion is a double-supported spring type, and the adhesive portion is integrally formed with the displacement portion.