JPH07182715A - Magneto-optical head device - Google Patents

Abstract

PURPOSE:To easily adjust positions by arranging an optical head and a magnetic head in positions oppositely to each other, incorporating an electromagnetic core in the magnetic head and providing an optical identifying section on the periphery of the magnetic field generating surface of the electromagnetic core. CONSTITUTION:A core supporting section 8 is structured as a slider, a core housing chamber is formed on the surface of an optical head side, an electromagnetic core 9 having a coil wound thereon is housed therein and the core 9 is fixed by a adhesive section 12 within a chamber 11. The adhesive section 12 is formed fixedly by filling the chamber 11 with adhesive agents colored greatly differently from a magnetic field generating surface 9a. The adhesive section 12 is, as shown by a meshlike pattern, arranged as if surrounding the all peripehry of the magnetic field generating surface 9a seen from the lower surface of a magnetic head 6 and the adhesive section 12 whose coloring is different from the magnetic field generating surface 9a is formed as an optical identifying section A. Even when a video is caused the colors of the magnetic field to be an alternate long and short dash line area and the colors of the magnetic field generating surface 9a, the core supporting section 8 are roughly identical and the dimension of the surface 9a is small, the adhesive section 12 is visibly confirmed and adjustment is made to bring a light point into contact with the center of the adhesive section 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical head device in which an optical head and a magnetic head are arranged at positions facing each other.

[0002]

2. Description of the Related Art A schematic view of a magneto-optical head device is shown in FIG. In FIG. 11, the magneto-optical disk D is rotatably supported by the rotary shaft of the spindle motor 1.
The head base 2 is configured to be movable in the disk radial direction (direction of arrow A), and an optical head 3 is fixed to the lower portion of the head base 2. One end of a leaf spring 4 is fixed to the standing portion 2a of the head base 2 with a screw 5, and a magnetic head 6 is fixed to the free end side of the leaf spring 4.

The optical head 3 has an objective lens 7,
The magneto-optical disk D is irradiated with laser light emitted by a built-in laser diode (not shown). The magnetic head 6
Has a built-in electromagnetic core 9 in which a coil (not shown) is wound inside the core supporting portion 8, and the electromagnetic core 9 outputs a magnetic field corresponding to the current passed through the coil to the magneto-optical disk D. The recording layer (not shown) of the magneto-optical disk D loses its originally retained magnetization even when its temperature rises above the Curie point by the irradiation of the laser beam, and is magnetized in the direction of the magnetic field by the magnetic head 6.

Here, if the position of the light spot of the laser beam formed on the recording layer and the position of the magnetic field applied to the recording layer do not match, proper recording cannot be performed, so the optical head 3 and the magnetic head 6 It is necessary to adjust the relative position of.
For this position adjustment, the screw 5 is loosely tightened so that the magnetic head 6 can move, and a half mirror 10 is arranged between the optical head 3 and the magnetic head 6 as shown in FIG. Visualize video from 10. The operator can see the image in the alternate long and short dash line area in FIG. 13 and moves the magnetic head 6 so that the light spot S is located substantially in the center of the magnetic field generation surface 9a. If the screw 5 is tightly tightened after this alignment, the process is completed.

[0005]

However, when the color of the magnetic field generating surface 9a and the color of the core supporting portion 8 around it are significantly different, the magnetic field generating surface 9a for aligning the light spots.
However, if the two colors are the same or close to each other, they cannot be easily recognized, and the alignment is troublesome.

Further, as high density recording is advanced, the size of the electromagnetic core 9 is gradually reduced.
In the case of micron to 800 micron square, magnetic field generating surface 9a
Even if the colors of the core supporting portion 8 and the surrounding core supporting portion 8 are significantly different, the magnetic field generation surface 9a cannot be easily recognized,
As with the above, alignment is troublesome.

Therefore, an object of the present invention is to provide a magneto-optical head device capable of easily recognizing the magnetic field generating surface and easily aligning the magnetic field generating surface and the light spot.

[0008]

In the magneto-optical head device of the present invention for achieving the above object, an optical head and a magnetic head are arranged at positions facing each other, and an electromagnetic core is built in this magnetic head. An optical identification unit is provided around the magnetic field generation surface of the electromagnetic core.

[0009]

[Function] Even if the color of the magnetic field generating surface and the core supporting portion are substantially the same, even if the size of the magnetic field generating surface is a size that hinders visual inspection, the optical identification portion can be easily visually confirmed. The position of the magnetic field generation unit can be recognized by using this optical identification unit as a mark.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In each embodiment, the schematic structure of the magneto-optical head device is the same as that of FIG. 11, and only the structure of the magnetic head different from the conventional structure will be described below.

1A and 1B show a magnetic head 6 according to the first embodiment. 1A and 1B, the core supporting portion 8 is configured as a slider, and the surface of the core supporting portion 8 on the optical head side (the lower surface in FIG. 1A).
A core storage chamber 11 is formed therein. An electromagnetic core 9 around which a coil (not shown) is wound is housed in the core housing chamber 11, and the electromagnetic core 9 is fixed by an adhesive portion 12 in the core housing chamber 11. The adhesive portion 12 is made of a colored adhesive that is significantly different from the magnetic field generating surface 9a.
It is formed by filling 1 and solidifying. As shown by a mesh pattern in FIG. 1B, the adhesive portion 12 is arranged so as to surround the entire circumference of the magnetic field generating surface 9a when viewed from the lower surface of the magnetic head 6, and in the first embodiment, the magnetic field generating surface 9a. The adhesive portion 12 having a different color is configured as the optical identification portion A.

In the above structure, the image from the half mirror becomes the one-dot chain line area in FIG.
Even if the colors of the core supporting portion 8 and the core supporting portion 8 are substantially the same, or the size of the magnetic field generating surface 9a is small, the adhesive portion 12 can be easily visually confirmed, and a light spot is formed at the center of the adhesive portion 12. Align so that it hits.

2A and 2B show a magnetic head 6 of the second embodiment. 2A and 2B, the core support portion 8 is configured as a slider, and the core support portion 8 has a through hole 13 formed therein. A colored portion 14 (shown by a mesh pattern in FIG. 2B) is attached to the through hole 13 on the optical head side, and a small hole 14a is formed at the center of the colored portion 14. The electromagnetic core 9 is arranged in the through hole 13 with its lower magnetic field generating portion being inserted into the small hole 14a, and is fixed by the adhesive filled in the through hole 13.

The coloring portion 14 has a color greatly different from that of the magnetic field generating surface 9a, and in the second embodiment, the coloring portion 14 is constructed as an optical discriminating portion A.

FIGS. 3A and 3B show the magnetic head 6 of the third embodiment, and FIGS. 4A and 4B show the magnetic head 6 of the fourth embodiment, FIGS. The magnetic heads 6 of the fifth embodiment are respectively shown in b). Compared to the first embodiment, the electromagnetic cores 9 of the third to fifth embodiments are of the gap type having a gap between the magnetic field generation pole portion 9b and the magnetic flux return portion 9c, and the third embodiment has one gap. The die of the fourth embodiment is a 2-gap type, and the die of the fifth embodiment is a 4-gap type.

In this gap type electromagnetic core 9, the lower surface of the magnetic field generation pole portion 9b is the magnetic field generation surface 9a, and the magnetic field generation surface 9a and the lower surface of the magnetic flux return portion 9c are entirely surrounded by the first magnetic field generation surface 9a.
An optical identification unit A is provided as in the embodiment and the second embodiment.

According to the third to fifth embodiments, when the adhesive portion 12 is visually confirmed from the image of the half mirror, a square shape in the adhesive portion 12 is found, and alignment is performed so that the light spot hits it.

6 (a), 6 (b), 6 (c), 7th
(A), (b), (c) and FIGS. 8 (a), (b),
(C) shows the respective modifications of the third to fifth embodiments. In the modified examples of FIGS. 6A, 6B, and 6C, the optical discriminator A (shown by a mesh pattern in each figure. The same applies below) is not provided around the lower surface of the magnetic flux return unit 9c. It is provided so as to surround only the entire circumference of the magnetic field generation surface 9a. In the modified examples of FIGS. 7A, 7B, and 7C, the optical identification portion A is provided in all gap portions of the electromagnetic core 9, and FIGS. 8A, 8B, and 8C. In the modified example of c), the optical discriminating portion A is provided in a part of a plurality of gap portions.

9 (a), 9 (b) and 9 (c) show another modification, in which the optical discriminating portion A is provided at a position slightly apart from the magnetic field generating surface 9a. .

FIGS. 10A and 10B show a magnetic head 6 of the sixth embodiment. 10A and 10B, the light transmission hole 1 is provided around the electromagnetic core 9 of the core support portion 8.
Lights 5 are formed at four positions, and light incident from above the core support 8 is emitted to the surface on the optical head side. This light transmission hole 15
It is preferable to block the above with a light-transmitting member because it is possible to prevent dust from clogging the light-transmitting holes 15 and adverse effects on the floating of the core support portion 8.

When light is applied from above the core supporting portion 8 when aligning the magnetic field generating surface 9a with the light spot, a light spot passing through the light transmitting hole 15 is formed around the magnetic field generating surface 9a. Align the light spot from the optical head. That is, in this sixth embodiment, the optical identification portion A is composed of the light transmission hole 15.

In each of the above embodiments, the optical discriminating portion A is composed of the adhering portion 12, the coloring portion 14 and the light transmitting hole 15, respectively, but it is possible to use the optical discriminating portion A optically as a guide for the magnetic field generating portion 9a. Other than the above may be used. The present invention can also be applied to the magnetic head 6 by a method other than the flying method (for example, a method in which the actuator controls the distance between the electromagnetic core 9 and the magneto-optical disk to be constant).

[0023]

As described above, according to the present invention, since the optical discriminating portion is provided around the magnetic field generating surface, the magnetic field generating surface can be easily recognized, so that the magnetic field generating surface and the light spot are aligned with each other. The effect is that it can be easily performed.

[Brief description of drawings]

FIG. 1A is a side view of a magnetic head, and FIG. 1B is a bottom view thereof (first embodiment).

2A is a side view of a magnetic head, and FIG. 2B is a bottom view thereof (second embodiment).

3A is a side view of a magnetic head, and FIG. 3B is a bottom view thereof (third embodiment).

FIG. 4A is a side view of a magnetic head, and FIG. 4B is a bottom view thereof (fourth embodiment).

5A is a side view of a magnetic head, and FIG. 5B is a bottom view thereof (fifth embodiment).

6A, 6B, and 6C are bottom views of magnetic heads (modifications).

7A, 7B, and 7C are bottom views of magnetic heads (modifications).

8A, 8B, and 8C are bottom views of magnetic heads (modifications).

9A, 9B, and 9C are bottom views of magnetic heads (modifications).

FIG. 10A is a side view of the magnetic head, and FIG. 10B is a bottom view thereof (first embodiment).

FIG. 11 is a schematic diagram of a magneto-optical head device.

FIG. 12 is a schematic view showing a method of position adjustment.

FIG. 13 is a diagram showing an image when viewed.

[Explanation of symbols]

 A ... Optical identification part 3 ... Optical head 6 ... Magnetic head 9 ... Electromagnetic core 9a ... Magnetic field generating surface 12 ... Adhesive part 14 ... Coloring part 15 ... Light transmitting hole

Claims (4)

[Claims] 1. An optical head and a magnetic head are arranged at positions facing each other, an electromagnetic core is built in the magnetic head, and an optical discriminating portion is provided around a magnetic field generation surface of the electromagnetic core. A magneto-optical head device. 2. The magneto-optical head device according to claim 1, wherein the optical discriminating portion comprises a colored adhesive portion different from the magnetic field generating surface. 3. The magneto-optical head device according to claim 1, wherein the optical discriminating portion is composed of a coloring portion having a color different from that of the magnetic field generating surface. 4. The magneto-optical head device according to claim 1, wherein the optical identification portion is configured as a light transmission hole through which light passes through the inside of the magnetic head.