JPH07176006A - Magnetic head for magneto-optical recording medium - Google Patents

Abstract

PURPOSE:To eliminate one-sided contact of a magnetic head which is supported by a supporting spring and is connected with lead wires or FPC to a coil with a disk surface by the influence of the lead wires or FPC and to stabilize the follow-up characteristics of a vertical direction and the stability of the posture of the magnetic head. CONSTITUTION:At least one among the respective members between a core 3, coil member 4 and case 2 are combined by a construction to permit relative displacement between the members 2, 3, 4 without fixing these members to each other. The posture of the magnetic head is not affected even if the coil member 4 is pulled or braced by the lead wires or FPC.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core made of a soft magnetic material, a coil member comprising a coil or bobbin wound directly on the core and a coil wound around the core, and a case containing the core and the coil member. And a magnetic head for magneto-optical recording in which the case is supported by a spring and a lead wire or a flexible printed wiring is connected to the coil.

[0002]

2. Description of the Related Art A magneto-optical recording apparatus uses a disk-shaped magnetic disk in which films such as magnetic thin films are laminated on a transparent substrate,
An optical pickup for irradiating a laser is provided on one side of the magnetic disk and a magnetic head for moving the laser spot is provided on the other side. At the time of writing, a magnetic field is applied to the magnetic disk by the magnetic head, laser light is irradiated to locally raise the temperature of the magnetic disk, and its coercive force is reduced to reverse the direction of magnetization to record information. To do. Further, in this magnetized state, the laser light is used to judge information by the photodetector to reproduce the information.

As shown in the side view of FIG. 12A and the plan view of FIG. 12B, a conventional magnetic head 1 used for the above-mentioned magneto-optical recording has a core 3 on the inner surface of a case 2. A coil member 4 including a coil 4a with a bobbin 4b mounted on the core 3 is fixed and housed. In the magnetic head 1, a support spring 6 is attached to a movable body 5 whose position is controlled by position information at the time of writing, and a bifurcated tip 6a of the support spring 6 is attached to a protrusion 2a provided on both side surfaces of the case 2. The magnetic head 1 is fixedly supported. Further, a lead wire having one end fixed to the movable body 5 or a connecting portion at the other end of a flexible printed wiring (hereinafter referred to as FPC) 7 is connected to a terminal 8 fixed to the bobbin 4b.

[0004]

The magnetic disk used in the above-described magneto-optical recording apparatus is a rigid plate and can be easily taken in and out from the apparatus. However, due to the accuracy of the apparatus, the magnetic disk is misaligned when set. Or a surface runout of about ± 0.5 mm occurs during rotation due to warpage during magnetic disk manufacturing. Due to this surface wobbling, the support structure of the support spring 6 of the magnetic head 1, and the mounting structure of the lead wire or the FPC 7, the magnetic head 1 does not follow the disk surface 10 and a sufficient magnetic field is applied to the magnetic disk. There is a problem in that it cannot be done and the disk surface is damaged by one-sided contact.

FIGS. 13A and 13B show this magnetic head 1.
It is a figure explaining the problem of the following nature. That is, in FIG.
As shown in (A), the disk surface is the reference surface 10 to 10
When the magnetic head 1 is moved up as the disk rotates as shown in a, the magnetic head 1 is pressed, the magnetic head 1 moves in an arc around the fulcrum O of the support spring 6, and moves from the point A to the point B. The magnetic head 1 moves away from the movable body 5,
That is, the lead wire or the FPC 7 is displaced in the extending direction by the distance indicated by X ₁ . However, lead wire or FP
Since C7 hardly extends, the magnetic head 1 inclines as shown in the drawing and hits one side. Therefore, the spacing becomes large and the magnetic field applied to the disk becomes small. On the contrary, as shown in FIG. 13B, when the disk surface descends from the reference surface 10 to 10b, it contracts from the reference position to A to B, whereby the lead wire or the FPC 7
Is displaced in the direction of contraction by the distance indicated by X ₂ , and the magnetic head 1 also tilts, causing a similar partial contact and a decrease in the applied magnetic field.

In order to solve such a problem, the lead wire or the FPC 7 is loosened, the lead wire is thinned, the number of the lead wires is reduced, the FPC is thin and narrow, and the bent shape is adopted. The disk surface 10
Was compatible with the up and down movement of the lead wire or FPC
Although 7 can follow the vertical movement, the rigidity does not decrease so much in the longitudinal direction of the lead wire or the FPC 7, so that the inclination or partial contact of the magnetic head 1 due to the surface wobbling of the disk surface 10 is eliminated. It is not possible.
Such a decrease in the followability is caused when the spring constant of the support spring 6 is small and becomes soft, or the number of lead wires is increased to flow a large amount of current, or the width of the FPC is widened. It becomes noticeable when the rigidity becomes high.

In addition to the above, it is necessary to take into consideration the variation due to the apparatus assembly state, the deformation due to the external force such as the vibration of the apparatus, and the change due to the change with time. Since it has to be manufactured, there is a problem that yield and productivity are deteriorated.

In view of the above-mentioned problems, the present invention eliminates one-sided contact with the disk surface of the magnetic head in the magnetic head using the support spring and the lead wire or the FPC, and also has the vertical followability and the stable posture. It is an object of the present invention to provide a magnetic head for magneto-optical recording which has improved stability and stable spring load and head vertical displacement characteristics.

[0009]

According to the present invention, in order to achieve the above object, at least one of the core, the coil member, and each member of the case is relatively displaceable without fixing the members to each other. It is characterized by being combined in a structure. The intervals set between the core and the coil member, between the coil member and the case, or between the core and the case may be set in consideration of possible displacement of the FPC and manufacturing error, and preferably 0.03 mm to 0. .50 mm, more preferably 0.05 mm
It is set to ~ 0.20 mm.

By forming the contact surface shape of at least one of the coil member and the inner surface of the case in contact with the coil member so as to be convex or R-shaped, the coil member can swing with respect to the case, or the core of the coil member. Make the shape of the insertion hole so that the opening on one side or both sides of the hole is wider than the central part.
The taper-shaped or R-shaped one is adopted as one of the structures in which the coil member can be displaced with respect to the core.

Further, the core and the coil member, the core and the case,
As another structure that allows relative displacement between the case and the coil member, the outer surface of the coil member and the case can be determined from the distance between the core insertion hole of the coil member and the main magnetic pole of the core inserted in the hole. By forming a narrow gap with the inner surface of the coil member accommodating portion, a structure is adopted in which the coil member does not contact the main magnetic pole of the core when the coil member is moving.
Further, as an example in which the core and the coil member are integrated, the distance between the outer surface of the core and the inner surface of the core accommodating portion of the case is determined by the distance between the outer surface of the coil member interlocking with the core and the coil member accommodating portion of the case. By forming a narrow gap with the inner surface, a structure is adopted in which the core does not contact the case even when the core is displaced together with the coil member.

[0012]

According to the present invention, at least one of the case member, the core member, and the coil member is provided with a gap to allow relative displacement, so that the rigidity and deformation of the FPC connected to the coil can be improved. The relative displacement is absorbed and is not transmitted to the case, and the degree to which the rigidity and deformation of the FPC affect the posture and displacement of the magnetic head supported by the support spring is reduced. Further, if the interval is too small, it becomes difficult to obtain the effect of reducing the influence of the FPC displacement. On the other hand, if it is too large, the function as a magnetic head is affected and the miniaturization of the magnetic head is hindered. According to the core non-contact structure described above, when the core, the coil member, or both of them are displaced, the core is prevented from contacting the coil member or the case, and the core is protected.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a plan view showing an embodiment of a magnetic head according to the present invention, and FIG. 1B is a sectional view taken along the line EE in FIG. 1A. As shown in FIG. It is supported by a support spring 6 and is connected to a lead wire or an FPC (hereinafter, FPC).
7 is connected to the terminal 8 and has the same appearance as FIG. Case 2 is a non-magnetic resin,
It is made of metal or ceramic, and has an inner space 2b for accommodating the core 3 and the coil member 4 therein. The core 3 is made of a soft magnetic ferrite or a metal magnetic plate. As shown in this example, the shape of the core is preferably E-shaped, U-shaped or pot-shaped, but other shapes may be used. As the coil member 4, in this example, the coil 4a is wound around the bobbin 4b and the bobbin 4b is fitted to the main magnetic pole 3a of the core 3. However, the bobbin 4b is eliminated and the coil 4a is wound around the core 3. It may be a structure.

In this embodiment, the core 3 is fitted in the inner space 2b of the case 2 so that the core 3 cannot be displaced relative to it, and is fixed by an adhesive. On the other hand, the coil member 4 to which the terminal 8 is connected to the FPC 7 enables a slight vertical and horizontal relative displacement with respect to the case 2 and the core 3, so that the main magnetic pole insertion hole 4c and the main magnetic pole 3a of the coil member 4 are connected to each other. A space a is provided between the outer circumference of the coil member 4 and the magnetic poles 3 at both ends.
An interval a is also provided between b and 3c, and an interval b is also provided between the upper end of the coil member 4 and the core 3. A space a is also provided between the inner space 2 b of the case 2 and the coil member 4.
Note that the intervals indicated by a are often not equal in reality, but they will be described as the same value for simplification of description.

As described above, by providing the spaces a and b between the coil member 4 and the core 3, the magnetic head is lifted by the rise of the disk surface 10 as shown in FIG. 1 (C) or FIG. 13 (A). 1 is displaced as shown by arrow c,
With this displacement, the coil member 4 is relatively pulled by the FPC 7 and displaced with respect to the core 3 and the case 2.
As described above, the case 2 supported by the support spring 6, that is, the entire magnetic head 1 is not displaced by being pulled by the FPC 7. The magnetic disk descends and
Even when the magnetic head 1 is displaced as shown in (B), and the magnetic head 1 is displaced in the direction opposite to the arrow c, that is, the direction in which the FPC 7 is stretched, it is possible to prevent the magnetic head 1 from being partially hit.

As described above, by making the coil member 4 to which the FPC 7 is connected relatively displaceable with respect to the core 3 and the case 2, the force due to the displacement of the FPC 7 is blocked or reduced, and the adverse effect on the magnetic head 1 is prevented. To be done. The magnetic head 1 is supported and restrained by the support spring 6, and the spring load-head vertical displacement characteristic of the support spring 6 is stabilized, and the vertical direction of the case 2 with respect to the swing of the disk surface and the mounting height. Trackability is improved. Also,
The flying / sliding posture of the magnetic head 1 is stable, and the magnetic head 1
No more uneven contact with the disc surface.

In this embodiment, the case 2 has a vertical width x = 4.2 mm, a horizontal width y = 3.8 mm, and a height h = 2.5 m.
m, height d of coil member 4 = 2.0 mm, width w = 2.5 m
m, the length e of the terminal 8 from the bobbin 4b to the connection with the FPC 7, e = 2.0 mm, the interval a = 0.1 mm, b = 0.1
It was set to 5 mm.

As in the above embodiment, the distance a = 0.1.
If set to mm, the coil member 4 will be ±
0.1 mm = relative displacement of 0.2 mm in total is possible, and vertical displacement of 0.15 mm is possible.

By adopting this structure, a sliding posture defect on the disc reference surface (a case where a part of the case is lifted by 1.0 μm or more from the disc surface due to one-sided contact is regarded as a sliding posture defect). The incidence decreased from 10% to 2% or less. Also, the surface runout of the disk surface (± 0.5m
m) and mounting height variation (± 0.3 mm), etc. of the magnetic head, that is, the range that can be moved up and down without causing a sliding posture defect is ± 0.2 of the conventional structure.
Widely expanded from mm to ± 0.8 mm. Further, the change in the inductance due to the position (especially height) of the coil member 4 with respect to the core 3 was about ± 2%, and there was almost no change in the electrical and magnetic characteristics.

FIG. 2A is a sectional view showing another embodiment of the present invention. In this embodiment, the coil member 4 is fixed to the core 3, the main magnetic pole 3a of the core 3 is the other magnetic pole 3b, 3c, and the tip of the main magnetic pole 3a is loosely fitted in the core positioning recess 2c provided at the bottom of the inner space 2b of the case 2 so that the outer surface of the core 3 and the inner surface of the inner space 2b of the case 2 In the meantime, gaps a and b are formed between the core 3 and the retaining portion 2d of the case 2, and these gaps a and b are set to the same values as in the embodiment of FIG.

In this embodiment, as shown in FIG. 2 (B), when the terminal 8 is pulled by the displacement c by the FPC 7 or bulged in the opposite direction, the core 3 together with the coil member 4 the tip of the main magnetic pole 3a. Swing around
Since the displacement by the PC 7 is not transmitted to the case 2 supported by the support spring 6, the same effect as that of the above-described embodiment can be obtained, and the coil member 4 swings the center of the contact surface. As compared with the case of sliding, the force applied to the FPC 7 becomes smaller, which is advantageous in achieving the effect, and it is more preferable that the tip of the main pole has a spherical R surface. In addition, since the core 3 can swing to the left and right in the drawing,
The vertical distance b between the core 3 and the case 2 is set to 0.
When the length e of the terminal 8 and the height d of the coil member 4 are made equal to each other by setting to 15 mm, the connecting portion 12 between the FPC 7 and the terminal 8 is ± 0.1 in the horizontal direction in the drawing and in the direction vertical to the paper surface.
It can be displaced by 5 mm.

FIG. 3A is a sectional view showing another embodiment of the present invention, and FIG. 3B is a perspective view of the bobbin which is drawn upside down. The basic structure of this embodiment is the same as that of FIG. 1, that is, the core 3 is fixed to the case 2, and the coil member 4 is displaceably combined with the core 3. Differently, the contact surface 4d of the bobbin 4b with the case 2
Is a convex shape with the center protruding. According to this embodiment, as the case 2 and the core 3 move left and right in the drawing,
The coil member 4 can be easily swung as shown by the arrow R, and the force applied to the FPC 7 is weakened, which is advantageous in achieving the effect. In this embodiment, when the distance f between the ends of the bobbin 4b and the case 2 is set to 0.1 mm, ± 0.1 mm,
It is possible to swing a total of 0.2 mm.

FIG. 4A is a sectional view showing another embodiment of the present invention, and FIG. 4B is a perspective view of the bobbin turned upside down. Similar to FIG. 2, this embodiment has a structure in which the core 3 and the coil member 4 are integrally combined, and the bottom surface convex portion 4d of the bobbin 4b is brought into contact with the bottom surface of the inner space 2b of the case 2. 3 and the coil member 4 are integrally linked. According to this embodiment, the same effect as that of the embodiment shown in FIG. 3 can be obtained. Note that FIG.
As shown in (C), if the contact surface is formed in the conical convex portion e, it can be rocked back and forth (left and right direction in the drawing) and left and right (direction perpendicular to the paper surface in the drawing).

FIG. 5 (A) is a sectional view showing a modification of the embodiment of FIG. 3 (A), and FIG. 5 (B) is a perspective view showing the bobbin of this embodiment in an upside-down state. The contact surface with the bottom surface of the inner space 2b of the case 2 is formed as an R surface portion 4f. According to this example, the same effect as that of FIG. It is stably accommodated on the case 2.

FIG. 6A is a sectional view showing a modification of the embodiment shown in FIG. 4A, and FIG. 6B is a perspective view showing the bobbin of this embodiment in an upside down state. The contact surface with the bottom surface of the inner space 2b of the case 2 is formed as a spherical R surface portion 4g. According to this example, the same effect as that of FIG. Is case 2
Stably housed on top.

In the embodiments of FIGS. 3 to 6, the contact surface protrusion or the R surface may be formed on the bottom surface side of the case 2,
Further, it may be formed on both of the contact surfaces of the bobbin 4b and the case 2.

FIG. 7A is a sectional view showing another embodiment of the magnetic head in which the core 3 is integrally housed in the case 2, and FIG. 7B is a perspective view of the bobbin, in which the core of the bobbin 4b is inserted. The hole 4h is formed in a tapered shape so that both openings j are wider than the central part i. According to this embodiment, as in the embodiments of FIGS. 3 and 6, F
When the force of the PC 7 is absorbed by the swing of the coil member (the shape shown in FIGS. 3 and 5 is preferably used together), a part of the core insertion hole of the coil member is squeezed to bring it closer to the main magnetic pole, thereby improving the magnetic efficiency. It is possible to suppress the decrease of the angle and increase the swing range. FIG. 8A is a sectional view showing a modification of FIG. 7 in which the core insertion hole 4i is formed in an R shape, and FIG. 8B is a perspective view showing the bobbin. The same effect as that of the embodiment shown in FIG. 7A can be obtained. 9 (A) and 9 (B) are a cross-sectional view and a perspective view of the bobbin showing a modified example of FIG. 7 (A).
The upper end opening of j is formed to be wider than the other end, and the swing range can be expanded.

FIG. 10A is a plan view showing another embodiment of the magnetic head in which the core 3 is integrally housed in the case 2.
The same (B) is a sectional view taken along the line F-F, and in the present embodiment, the coil is calculated from the distance a between the core insertion hole 4c of the coil member 4 and the main magnetic pole 3a of the core 3 inserted into the hole 4c. The distance k between the outer surface of the member 4 and the inner surface of the coil member housing portion 2b of the case
By narrowing (a> k), the coil member 4 does not contact the main magnetic pole 3a of the core 3 when the coil member 4 is displaced. According to the present embodiment, the effects of the embodiments of FIGS. 1 to 6 can be enhanced, and in addition, the force applied when the coil member 4 is displaced by the displacement of the FPC 7 is the main magnetic pole of the core 3. There is an effect that it does not act on 3a and there is no fear that the core 3 will be broken by an external force.

FIG. 11A is a plan view showing another embodiment of the present invention, and FIG. 11B is a sectional view taken along line GG thereof. In this embodiment, the outer surface of the core 3 and the core housing of the case 2 are accommodated. The distance k between the outer surface of the coil member 4 which is integrated with the core 3 and the inner surface of the coil member accommodating portion 2b of the case 2 is formed narrower than the front-rear left-right distance a and the vertical distance b between the inner surface of the portion 2b. (A, b
> K), the outer periphery of the core 3 does not come into contact with the case 2 when the core 3 and the coil member 4 are displaced. According to the present embodiment, the effect of protecting the core including the auxiliary magnetic pole 3b is provided. Can be raised.

In the embodiment of FIG. 11, the FPC7
If the core 3 is tilted by the force of, the magnetic field may change and the characteristics may deteriorate. As shown in FIG. 11C, the inclination angle of the core 3 is θ, and the case 2 from the upper part of the flange portion of the main magnetic pole 3a.
Let L be the length to the bottom contact part of, then k = Lsinθ, and in this equation, k = 0.1
When mm and L = 2.2 mm, θ = 2.6 degrees, but the deterioration of recording characteristics was within 0.5 dB, which was not a problem.

[0031]

According to the first aspect of the present invention, in the magnetic head supported by the support spring, at least one of the core, the coil member, and the case can be relatively displaced without fixing the members to each other. As a result, the rigidity of the lead wire or FPC,
Even if the displacement occurs, it is not transmitted to the case, or the transmitted force is reduced, so the lead wire or FP
One-sided contact of the magnetic head with respect to the disk surface due to the displacement of C is eliminated, and the followability of the magnetic head with respect to the disk surface in the vertical direction and the stability of the posture are improved.
The spring load and vertical displacement characteristics of the head are also stable. Further, since dimensional accuracy and combination accuracy of each constituent member do not need to be strict as in the conventional case, productivity and yield are improved.

According to claim 2, the lead wire or the FPC
It is possible to obtain the effect of reducing the above-mentioned adverse effect due to the displacement, and also to prevent the function of the magnetic head from being impaired and to increase the size of the magnetic head.

According to the third aspect of the present invention, since at least one of the contact surfaces of the coil member and the inner surface of the case in contact with the coil member is formed in a convex shape or an R shape, the coil member can swing with respect to the case. The coil member can be easily displaced by the FPC displacement, and a favorable effect can be obtained in reducing the adverse effect on the posture of the magnetic head due to the lead wire or the FPC displacement.

According to the fourth aspect, the shape of the core insertion hole of the coil member is tapered or R-shaped so that the opening on one side or both sides of the hole is wider than the central portion. The swing range of the coil member can be expanded while suppressing the decrease.

According to the fifth aspect, the distance between the outer surface of the coil member and the inner surface of the coil member accommodating portion of the case is determined by the distance between the core insertion hole of the coil member and the main magnetic pole of the core inserted in the hole. Since the coil member does not come into contact with the main magnetic pole of the core even when the coil member is displaced by forming it narrow, the force applied when the coil member is displaced by the displacement of the lead wire or the FPC is applied to the main magnetic pole of the core. There is no action, and there is no fear that the core will break due to external force.

According to the sixth aspect, the same effect as that of the second aspect can be obtained by setting the dimension between the core and the case.

According to the present invention, the distance between the outer surface of the core and the inner surface of the core accommodating portion of the case is greater than the distance between the outer surface of the coil member and the inner surface of the coil member accommodating portion of the case which are interlocked with the core. By forming the core narrow, the outer surface of the core does not come into contact with the case even when the core is displaced together with the coil member, so that the same core protection effect as in claim 5 is obtained.

[Brief description of drawings]

FIG. 1A is a plan view showing an embodiment of a magnetic head according to the present invention, FIG. 1B is a sectional view taken along line EE of FIG. 1, and FIG. 1C is a sectional view explaining the operation of the embodiment.

FIG. 2A is a sectional view showing another embodiment of the magnetic head according to the present invention, and FIG. 2B is a sectional view explaining the operation of the embodiment.

FIG. 3A is a cross-sectional view showing another embodiment of the magnetic head according to the present invention, and FIG. 3B is a perspective view showing the bobbin turned upside down.

4A is a cross-sectional view showing a modification example of FIG.
(B) is a perspective view showing the bobbin turned upside down,
(C) is a perspective view showing a modification of the bobbin.

5A is a cross-sectional view showing a modification example of FIG.
(B) is a perspective view showing the bobbin in an upside down manner.

6A is a cross-sectional view showing a modification example of FIG. 4A,
(B) is a perspective view showing the bobbin in an upside down manner.

7A is a sectional view showing another embodiment of the magnetic head according to the present invention, and FIG. 7B is a perspective view showing the bobbin thereof.

8A is a cross-sectional view showing a modification example of FIG. 7A,
(B) is a perspective view showing the bobbin.

9A is a cross-sectional view showing a modification example of FIG. 7A,
(B) is a perspective view showing the bobbin.

10A is a plan view showing another embodiment of the magnetic head according to the present invention, and FIG. 10B is a sectional view taken along line FF of FIG.

11A is a partially cutaway plan view showing another embodiment of the magnetic head according to the present invention, FIG. 11B is a sectional view taken along line GG thereof, FIG.
(C) is the action explanatory drawing.

12A is a side view showing a conventional magnetic head for magneto-optical recording, and FIG. 12B is a plan view thereof.

13A and 13B are side views showing problems of the conventional magnetic head for magneto-optical recording.

[Explanation of symbols]

 1 magnetic head 2 case 3 core 3a main magnetic pole 4 coil member 4a coil 4b bobbin 4c, 4h to 4j main magnetic pole insertion hole 4d, 4e convex portion 4f, 4g R surface portion 5 movable body 6 support spring 7 lead wire or FPC 8 terminal 10 disk side

Claims (7)

[Claims] 1. A core comprising a soft magnetic material, a coil member comprising a coil wound directly on the core or a coil mounted on the core via a bobbin, and a case accommodating the core and the coil member. The case is supported by a spring,
In a magneto-optical recording magnetic head in which a lead wire or a flexible printed wiring is connected to the coil, at least one of the core, the coil member, and each member of the case can be relatively displaced without fixing the members to each other. A magnetic head for magneto-optical recording characterized by being combined in the above structure. 2. The core according to claim 1, wherein a gap is provided between the core and the coil member, and the gap between them is 0.03 mm to 0.50.
A magnetic head for magneto-optical recording characterized by being set to mm. 3. The coil member according to claim 1, wherein at least one of contact surfaces of the coil member and an inner surface of the case in contact with the coil member is formed in a convex shape or an R shape so that the coil member can swing with respect to the case. A magnetic head for magneto-optical recording characterized by the above. 4. The core insertion hole of the coil member according to claim 1, wherein the core insertion hole is formed in a tapered shape or an R shape so that one side or both openings of the hole are wider than the central portion. Magnetic head for magneto-optical recording. 5. The distance between the outer surface of the coil member and the inner surface of the coil member accommodating portion of the case as defined by the distance between the core insertion hole of the coil member and the main magnetic pole of the core inserted in the hole. A magnetic head for magneto-optical recording characterized by being formed narrowly. 6. The core according to claim 1, wherein a gap is provided between the core and the case, and the gap between them is 0.03 mm to 0.50.
A magnetic head for magneto-optical recording characterized by being set to mm. 7. The gap between the outer surface of the coil member and the inner surface of the coil member accommodating portion of the case, which are integrally interlocked with the core, according to the distance between the outer surface of the core and the inner surface of the core accommodating portion of the case. A magnetic head for magneto-optical recording, characterized in that it is formed narrow.