JPH05258388A - Magnetic head for magneto-optical recording and its manufacture - Google Patents

Abstract

PURPOSE:To eliminate problems in terms of precision and of assembly manhour and to reduce cost by integrating protruding parts with a bobbin by means of insertion-formation and elastically holding the bobbin through the respective protruding parts. CONSTITUTION:Since the bobbin 12 is constituted to be held by both piece parts through the protruding parts 17, the protruding parts function as gimbal plates and the bobbin 12 is fixed to a pair of the piece parts 16 in a supporting body 15 so as to elastically hold it when the shape of the both protruding parts 17 inserted into the bobbin 12 are made thin, for example. Since the protruding parts provided for the supporting body are integrated with the bobbin by insertion-formation, the problems in terms of precision and of assembly man-hour caused by fixing the bobbin to the supporting body by an adhesive or the like is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for magneto-optical recording and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a recording system for a magneto-optical disk, a magnetic field modulation type magneto-optical recording system capable of overwriting a new signal on an old signal is known. FIG. 17 is a schematic configuration diagram showing an example of the magnetic field modulation type magneto-optical recording method. In the recording system shown in the figure, a magneto-optical disk 1 serving as a magneto-optical recording medium having a magneto-optical recording layer of a perpendicular magnetization film is sandwiched, and an optical pickup for irradiating a laser beam 2 is arranged on one side and a laser is formed on the other side. A magnetic field generating means that moves in synchronization with the spot, that is, the magnetic head 3 is arranged, and the direction of the magnetic field is changed by changing the direction of the current flowing through the magnetic head 3. A magnetic field corresponding to the magnetic signal is formed in the vicinity of the laser spot, so that the desired rewrite portion 1A of the magneto-optical disk 1 is heated to a Curie temperature or higher by the laser spot 2a and demagnetized, and then moved from the laser spot 2a. When the temperature falls below the Curie temperature, the recording is performed by being magnetized in the above magnetic field direction.

By the way, the conventional magneto-optical disk 1 is a non-contact medium, and the magnetic head 3 is arranged at a predetermined distance from the disk 1, and an electromagnetic wave is applied so as to follow the surface wobbling of the disk 1 due to rotation. It is attached to a servo mechanism. For this reason, the recording / reproducing apparatus that employs the non-contact method with respect to the disk 1 has limitations in reducing power consumption, downsizing the device (in particular, reducing the thickness of the device), and reducing the weight.

Therefore, if the conventional idea is reversed and the magnetic head is brought into contact with and slides on the magneto-optical disk, the magnetic head may be supported by a simple support structure, and the electromagnetic servo mechanism is omitted. This is advantageous in terms of power consumption, size reduction, weight reduction, and the like. As the magneto-optical recording magnetic head used in this contact direction, the structure shown in FIG. 18 has been previously proposed. This magnetic head is mainly composed of a bobbin 8 in which a magnetic head portion 4 is wound with a coil 5 and a magnetic core 6 is provided inside. The bobbin 8 is fixed to a gimbal plate 9 and further fixedly held to a support body 10. Is.

The bobbin 8 has its upper end set as a sliding portion 8a which contacts the disk, and has a terminal 7 integrally formed with an insert or the like. The terminal of the coil 5 is entangled with this terminal 7. The magnetic core 6 is incorporated from the back side inside. The gimbal plate 9 is made of sheet metal,
An inner portion defined by two U-shaped through-grooves 9a and a thin connecting portion 9b left between the through-grooves 9a serves as a mounting portion 9c for fixing the bobbin 8. The support 10 constitutes a carriage or an arm. A hollow portion 10a is provided on the end side of the support body 10, and the outer peripheral portion of the hollow portion 10a is the mounting portion 10b. Each of these parts is assembled with an adhesive. That is, the magnetic head portion 4 is completed by winding the coil 5 around the bobbin 8 and internally arranging the magnetic core 6, and then the mounting portion 9c of the gimbal plate 9 is completed.
The back surface of the bobbin 8 is fixed with an adhesive, and the gimbal plate 9 is fixed to the mounting portion 10b of the support body 10 with an adhesive to be assembled and elastically held.

[0006]

By the way, in the magnetic head structure as described above, the bobbin 8 for the gimbal plate 9 and the gimbal plate 9 for the support 10 are provided.
Since each fixing operation is performed, it takes a lot of time for assembling, and it is difficult to stabilize the positional accuracy between components. Moreover, since each part is fixed by using an adhesive and the bonding is performed at two places, reliability is poor and automation is difficult, which is not the best in terms of manufacturing cost.

Further, the terminal 7 has a structure in which it is integrally projected on the bobbin 8 by insert molding, and the projecting position and directionality of the terminal 7 are restricted in relation to the bobbin formation, so that the degree of freedom in design cannot be obtained. It was

Therefore, the present invention has been proposed in view of the above circumstances, and it is possible to elastically hold the magnetic head portion while eliminating the gimbal plate as a single item, and to eliminate the assembling step by bonding the parts together. It is an object of the present invention to provide a magnetic head for magneto-optical recording and a method for manufacturing the same, which can further reduce the manufacturing cost and can increase the degree of freedom with respect to the protruding position and directionality of the terminals.

[0009]

The magnetic head for magneto-optical recording of the present invention has been proposed in order to achieve the above-mentioned object, and the magnetic head portion winds a coil and a magnetic core is internally provided. In the magnetic head for magneto-optical recording in which the bobbin is mainly used, and the bobbin is fixed to a sheet metal support, the support has a pair of one-sided portions for positioning the bobbin therebetween,
A protrusion formed on each of the opposite sides of the one portion,
The protrusion is integrated with the bobbin by insert molding, and the bobbin is elastically held through the protrusion.

Further, in the magnetic head for magneto-optical recording of the present invention, the support has a terminal portion projectingly formed on each piece for tying the end of the coil.

On the other hand, the manufacturing method of the present invention is made of a sheet metal having a pair of piece portions for positioning the bobbin between them, a bridge connecting these piece portions, and a projection formed on the opposite side of these piece portions. A step of forming a support consisting of: a step of integrating the support into a bobbin by insert molding; a step of assembling a coil and a magnetic core into the bobbin to form a magnetic head section; And a step of cutting the bridge so that the bridge becomes electrically non-conductive.

Further, in the manufacturing method of the present invention, a pair of piece portions each having a protruding portion for locating the bobbin therebetween on opposite sides are provided in common so that the proximal side is connected. A step of forming a plurality of bridges at predetermined intervals according to the number of bobbins, a step of integrating the pair of piece parts into each bobbin by insert molding, and a coil and a magnetic core being attached to each bobbin and a magnetic head part. And a step of cutting a connecting portion between each of the pieces and the bridge.

Further, in the manufacturing method of the present invention, a pair of piece portions each having a protruding portion for locating the bobbin therebetween are provided on opposite sides, and a common bridge is formed so that the one end sides are connected. A step of forming a plurality of pieces at predetermined intervals according to the number of bobbins, a step of integrating the pair of piece parts into each bobbin by insert molding, and attaching a coil and a magnetic core to each bobbin to form a magnetic head part. The method is characterized by comprising a step of forming a plurality of pieces and a step of cutting a connecting portion between each of the above-mentioned one portion and the bridge.

Further, in the magneto-optical recording magnetic head of the present invention, the magnetic head portion comprises a bobbin in which a coil is wound and a magnetic core is provided internally, and a gimbal for elastically holding the bobbin and the gimbal. A supporting member made of a metal plate for holding the gimbal, and the gimbal is formed integrally with the supporting member.

The magneto-optical recording magnetic head of the present invention is for magneto-optical recording in which a coil is wound and a magnetic head portion having a bobbin in which a magnetic core is provided is fixed to a support. The magnetic head is characterized in that the support is composed of a pair of piece portions and a gimbal that is connected between the piece portions via a protrusion.

In the above magnetic head for magneto-optical recording, the gimbal has two through grooves formed in a U shape along the outer peripheral side. Further, in this magnetic head, the magnetic head portion is elastically held with respect to the gimbal.

Further, in the manufacturing method of the present invention, a step of forming a gimbal for elastically holding the magnetic head portion through a protrusion between a pair of pieces, and attaching a coil and a magnetic core to a bobbin for magnetic The method is characterized by comprising a step of forming a head portion and a step of mounting the magnetic head portion on the gimbal.

[0018]

In the magneto-optical recording magnetic head according to the first aspect of the present invention, since the bobbin is held on both pieces through the respective projections, it is possible to make the projections inserted into the bobbin thinner, for example. , These projections function as a gimbal plate, and elastically hold the bobbin against both half portions of the support.

Further, in the present invention, since the protrusion provided on the support is integrated with the bobbin by insert molding, the bobbin is fixed to the support with an adhesive and the like, and the number of assembly steps is high. Problem does not occur.

Further, in the present invention, the sheet metal support can be formed into an arbitrary shape by pressing or etching, and it is easy to integrally form the terminal portion of the coil on each piece. Further, by providing the terminal portion on the support body side, the protruding position and the directionality of the terminal portion are not so restricted by the relationship with the bobbin shape as in the conventional case. Further, by increasing the degree of freedom of the terminal portion in this manner, it is possible to design in consideration of workability such as soldering.

In the manufacturing method according to the first aspect of the invention, a pair of pieces provided with protrusions are connected to each other via a bridge to form an integral support, and the bridge is cut after insert molding on a bobbin. By doing so, it is superior in the workability of the support than the method of producing each piece separately,
Moreover, the handling of the parts, especially the setting during insert molding can be performed easily and accurately.

In the manufacturing method of the first invention,
After forming a plurality of pieces in a common bridge according to the number of bobbins with a pair of pieces as one unit, insert each piece into a bobbin to integrate them, and then separate each piece, so that multiple pieces can be formed simultaneously. Individual magnetic heads are produced and productivity is increased.

In the magnetic head for magneto-optical recording according to the second aspect of the present invention, the support made of sheet metal is integrated with, for example, a gimbal in a part thereof through a thin protrusion,
The magnetic head portion can be elastically held. Therefore,
The work of bonding the gimbal to the support, which has been handled as a single item, is no longer necessary, and the accuracy of the magnetic head assembly and the number of assembly steps are greatly reduced.

Further, since two through-grooves are formed in the gimbal, even if an unexpected impact is applied to the magnetic head portion, the gimbal elastically supports the magnetic head portion. The shock is softened.

In the magneto-optical recording magnetic head according to the second aspect of the present invention, a gimbal for elastically holding the magnetic head part is integrally formed on the support body between the pair of half-piece parts through the projection part. Therefore, it is possible to omit the troublesome work of attaching the gimbal to the support body with an adhesive or the like, and to simplify the number of assembling steps.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings.

Example 1 In this example, the detailed structure of the magnetic head will be clarified while the manufacturing method of the magnetic head for magneto-optical recording will be described in detail with reference to FIGS. FIG. 1 shows a magnetic head for magneto-optical recording of this embodiment. In this magnetic head, a magnetic head portion 11 is mainly composed of a bobbin 12, a coil 13 is wound around the bobbin 12, and a magnetic core 14 is internally provided, and the magnetic head portion 11 is fixed to a pair of half portions 16 of a support body 15. The structure is elastically held.

The support 15 is made of sheet metal, and as shown in FIG. 2, a pair of piece portions 16, a protrusion 17 formed on the opposite side of each piece portion 16, and a bridge 19 for connecting each piece portion 16. Etc. are integrally manufactured by pressing or etching. The distance between the two pieces 16 or the bridge 19
The length of is the dimension in which the bobbin 12 fits in here with a gap. The protruding portion 17 is provided with a predetermined distance from the bridge 19 and includes a horizontal portion 17a and a vertical portion 17b that are substantially L-shaped in a plane. The horizontal portion 17 a is joined to the piece portion 16. The vertical portion 17b is parallel to the piece portion 16 and extends beyond one end thereof, and a protruding tip portion thereof serves as a terminal portion 18 for the coil.

The support 15 constitutes a carriage or an arm, and an external connection or an elongated slot 16a for fixing is provided on the other end side of each piece 16 as required in this embodiment. The material of the support 15 is preferably phosphor bronze, nickel silver, or the like, which is excellent in spring properties, and the plate thickness is preferably 0.5 mm or less because followability is required.

The support 15 described above is integrated with the bobbin 12 by insert molding. In the insert molding, the protrusion 17 is set in a state where a part of the protrusion 17 is placed in the molding die, and the plastic which has been in a heated and fluidized state is filled into the die at a high pressure. By this insert molding, the bobbin 12 is moved to the position shown in FIG.
As shown in, a part of the protrusion 17 is formed in a state of being inserted into the lower flange portion 12a. This bobbin 12
It has a sliding portion 12b facing the disc at the upper end, a winding shaft portion 12c is formed between it and the flange portion 12a, and the portion including the flange portion 12a and the shaft portion 12c corresponds to the magnetic core 14. The engaging hole 12e is provided.
As the material of the bobbin 12, for example, a polyacetal-based engineering plastic having excellent self-lubricating property and moldability is used.

In this way, the bobbin 12 is formed in a state of being elastically held between the half portions 16 of the support 15 and sent to the assembling step. Here, as shown in FIG. 4, the winding work of the coil 13 and the mounting work of the magnetic core 14 are performed to form the magnetic head portion 11. In the coil winding work, the coil 13 is wound around the winding shaft portion 12c by a predetermined number of turns by an automatic winding machine, and the coil end 13a is entangled with the terminal portion 18 protruding from one end surface of the flange portion 12a. Be done.
The core mounting work is performed by the flange portion 12a and the winding shaft portion 12
The magnetic core 14 is inserted into and integrated with the engagement hole 12e provided in c. After that, a part of the bridge 19 is cut by a method such as laser or pressing, so that each piece portion 16 and each terminal portion 18 are brought into an electrically non-conductive state, and the magnetic head for magneto-optical recording is completed. The coil winding work, the core mounting work, and the cutting work can be performed in any order. For example, the coil winding work and the core mounting work may be performed after cutting the bridge 19.

In the completed magnetic head for magneto-optical recording, the magnetic head portion 11 or the bobbin 12 is located between the half portions 16 of the support body 15, and is elastically held through the insert portion of the protrusion 17. In this holding structure, the protrusion 1
Shape including width dimension of 7, flange portion 12a and half portion 16
The magnetic head unit 1
It is also easy to change the elasticity for 1. Therefore, the present invention eliminates the gimbal plate as a single item, and at the same time as the gimbal plate, the magnetic head unit 11
Can be elastically held, and cost reduction can be expected by reducing the number of parts. In addition, since the support body 15 is integrated with the bobbin 12 by insert molding, the troublesome work of fixing the support body 15 with an adhesive or the like can be eliminated, and the dimensional accuracy between the components can be further stabilized.

FIG. 5 shows an example in which the support 15 is modified. In the support body 15 shown in the figure, the shape of the protrusion 17 provided on each piece portion 16 is different from that of the previous one. The protrusion 17 has a shape in which a tip portion of the vertical portion 17b is bent downward, in addition to the horizontal portion 17a and the vertical portion 17b which are substantially L-shaped in a plan view. This downwardly bent portion is the terminal portion 18a, and the coil terminal 1
It is designed to entangle 3a.

Second Embodiment FIGS. 6 and 7 show a magneto-optical recording magnetic head according to a second embodiment, in which only the portions technically different from those of the first embodiment are designated by different reference numerals. In this embodiment, an added value is further added to the support 15 in the first embodiment. In the figure, the support 25 is made of sheet metal, and as shown in FIG. 6, a pair of piece portions 26, a protrusion 27 and a terminal portion 28, a bridge 19 connecting the piece portions 26, and a male connector 29 for insertion. And has been manufactured by pressing and etching as one body. The protrusion 27 is formed on each of the pieces 26.
Is formed so as to project at a portion on the opposite side of the bridge and at a predetermined distance from the bridge 19. The terminal portion 28 is provided outside each piece portion 26 and at a substantially intermediate portion between the protrusion 27 and the bridge 19, and has a structure in which a portion of the piece portion 26 is bent downward. The male connector 29 for insertion is formed in the end part of each piece part 26 by protrusion, and is connected to a male connector not shown.

The support 25 described above is integrated with the bobbin 12 by insert molding as in the first embodiment. In insert molding, as shown in FIG.
Is the same as the first embodiment in that it is formed in a state of being inserted into the lower flange portion 12a. In addition, each piece 26 is integrated by a connecting portion 30 formed on the male connector 29 side for insertion and covering a part of the piece 26. The connecting portion 30 is provided with a fixing long hole 30a.

In the second embodiment, since the terminal portion 28 is projected to the lower side of the supporting body 25 as in the modification of FIG. 5, the terminal portion 28 is not restricted to the bobbin shape so much and its projecting position and projecting direction. In addition to being able to design, the dimension of the support 25 in the length direction can be shortened. In addition, the support 25
By integrally including the male connector 29 for insertion and the connecting portion 30, it becomes possible to more easily connect and fix the apparatus main body side in which the completed magnetic head is incorporated.

Embodiment 3 FIGS. 8 to 11 show an example in which a magnetic head for magneto-optical recording is manufactured in a multiple manner. As shown in FIG. 8, the support 35 made of sheet metal has a pair of piece portions 36 as one unit, and a plurality of sets 36
-1, 36-2, 36-3, 36-4 are formed in a state of being connected at a predetermined interval by a common multiple-use bridge 39 provided at one end. Bridge 3 on each half 36
An elongated hole 36a for external connection or fixing is provided on the 9 side,
Further, a protrusion 37 is formed on the opposite side of each piece.
The protrusion 37 is composed of a horizontal portion 37a and a vertical portion 37b which are substantially L-shaped in a plane. The vertical portion 37b is a single portion 36
Parallel to and extending from one end thereof, and a protruding tip end portion thereof serves as a coil terminal portion 38. Multiple bridge 3
Slots 39a for positioning are provided at 9 at predetermined intervals.

The support 35 formed in a multiple manner is integrated with the bobbin 32 by insert molding in that state as in the first embodiment. FIG. 9 shows the insert-molded state. The bobbins 32 are each set 36-1, 36-2, 36-.
3 and 36-4, respectively, and a part of the protrusion 37 is formed in the lower flange 32a. The bobbin 32 has a sliding portion 32b that contacts the disc at the upper end, a winding shaft portion 32c is formed between the bobbin 32 and the flange portion 32a, and the flange portion 32a and the winding shaft portion 32c are formed. An engaging hole 32e corresponding to the magnetic core 34 is provided in the included portion.

FIG. 10 shows a state in which the coil 33 is wound around each bobbin 32 formed in the multiple chain type. In this coil winding work, the coil 33 is shrunk by the flyer type automatic winding machine that swirls the wire around the bobbin 32.
The coil end 33 is wound around 2c by a predetermined number of turns.
a is a terminal portion 38 protruding from one end surface of the flange portion 32a.
Entangled in. This is done sequentially for each bobbin 32. The long hole 39a of the multiple bridge 39 is
It is used for positioning during insert molding and coil winding work.

FIG. 11 shows the final step of mounting the magnetic core 34 and cutting the multiple bridge 39. A magnetic core 34 is attached to the engagement hole 32e of each bobbin 32, and each set 36-1, 36-2, 36-3, 36.
-4, all the one-piece parts 36 are cut from the connecting part with the multiple bridge 39 with a laser or the like. As a result, a number of completed magnetic heads for magneto-optical recording can be obtained.

According to such a multiple type, in insert molding, in addition to handling such as conveyance of the support 35, setting of the support 35 with respect to the molding die and demolding work after molding can be collectively performed. In coil winding work, settings for the automatic winding machine can be performed collectively. The core mounting work is also the same. Therefore, in this embodiment, the first and second
The manufacturing cost per piece can be further reduced as compared with the single-piece manufacturing method as in the embodiment of the above, and handling is possible here due to the presence of the multiple-use bridge 39 in addition to handling a plurality of pieces at once. As a result, it is possible to drastically reduce stains and damage defects in each process, improve yield, and facilitate automation.

12 and 13 are modified examples of the support 35 of the third embodiment. In the figure, the support 35 made of sheet metal has a pair of piece portions 36 as one unit, and a plurality of sets 36-1, 36-2, ... Common multiple bridge 3 installed in
It is the same in that it is formed in a state of being connected by 9 and that a projection 37 with a terminal 38 is formed on the opposite side of each piece 36. The different configurations are that the multiple bridge 39 is provided at the end of the piece portion 36 on the side of the protrusion 37, and that the vertical portion 37b of the protrusion 37 is formed so as to project in the opposite direction. This is to reinforce the bobbin 32 side of the piece portion 36 by arranging the multiple bridge 39 on the side where the bobbin 32 is formed, and prevent the piece portion 36 from bending during insert molding or coil winding work. By changing the protruding direction of the terminal portion 38, the support 3
The dimension of 5 in the length direction is shortened.

To produce this magnetic head for magneto-optical recording, after the support 35 shown in FIG. 12 is produced, the support 35 is insert-molded into the bobbin 32 to be integrated, and the coil 33 is attached to the bobbin 32. And the magnetic core are assembled, and then the connecting portion is cut.

Embodiment 4 In the magneto-optical recording magnetic head of this embodiment, as shown in FIGS. 14 and 15, the magnetic head portion 41 mainly comprises a bobbin 42, and a coil 43 is wound around the bobbin 42. The magnetic core 44 is internally provided, and the magnetic core 44 is fixed to a gimbal 47 located between a pair of pieces 46 of the support body 45 and elastically held.

The bobbin 42 has a sliding portion 42b which contacts the disc at the upper end thereof, a winding shaft portion is formed between the bobbin 42 and the flange portion 42a, and the flange portion 42a and the winding shaft portion are formed. The engaging hole 42 corresponding to the magnetic core 44 in the portion including
c is provided. A coil terminal 48 is formed at one end of the flange portion 42a by insert molding or the like.

Then, the magnetic head portion 41 is completed by winding the coil 43 and mounting the magnetic core 44 on the bobbin 42. The coil winding work is performed by an automatic winding machine, and the coil 43 is wound around the winding shaft portion by a predetermined number of turns, and the coil end 43 is wound.
The a is entwined with the terminal 48 protruding from the flange portion 42a.
On the other hand, in the core mounting work, the magnetic core 44 is inserted into the flange 42a and the engaging hole 42c provided in the winding shaft to be integrated. The material of the bobbin 42 is the same as that of the first embodiment.

The support body 45 is made of sheet metal, and has a pair of piece portions 46, and a gimbal 47 that is connected and supported between the piece portions 46 via a protrusion 49, as shown in FIG. It is integrally formed by pressing or etching. The size of the gimbal 47 is a bobbin 42.
It is large enough to be held on the gimbal 47 with some space. In the gimbal 47, two through grooves 47a having a U shape are formed along the outer peripheral side, and a thin connecting portion 47b is left between the through grooves 47a. And
Inner portion 4 partitioned by the through groove 47a and the connecting portion 47b
The bobbin 42 of the magnetic head portion 41 is fixed to the predetermined position at 7c. This fixing work is performed using an adhesive, and the bobbin 42 is fixed to complete the magnetic head for magneto-optical recording.

The support 45 constitutes a carriage or an arm, and an external connection or an elongated slot 46a for fixing is provided on the end side of each piece portion 46 as required in this embodiment. The material of the support 45 is the same as that of the first embodiment.

In the completed magnetic head for magneto-optical recording, the magnetic head portion 41 or the bobbin 42 is located between the half portions 46 of the support 45, and is elastically held by the gimbal 47 connected and supported by the protrusion 49. There is. In this holding structure, it is easy to change the degree of elasticity with respect to the magnetic head portion 41 by devising the shape including the width and length of the protrusion 49. Therefore, the present invention eliminates the gimbal plate as a single item, while maintaining the gimbal 47.
The magnetic head portion 41 can be elastically held to the same extent by the presence of the above, and cost reduction can be expected by reducing the number of parts.
In particular, since the gimbal 47 is formed integrally with the support body 45, the troublesome work of fixing the two with an adhesive or the like can be eliminated, and the dimensional accuracy between the components can be further stabilized.

FIG. 16 shows a modification of the support 45. The support member 45 is formed on the inner portion 47c of the gimbal 47.
This is different from the fourth embodiment in that the insertion hole 47d is provided in the. The insertion hole 47d is sized to allow the magnetic core 44 to pass therethrough, and allows the magnetic core 44 to be mounted after the bobbin 42 of the magnetic head portion 41 is fixed to the inner portion 47c. Therefore, according to this configuration, the uniformization of the assembling process is alleviated to some extent.

[0051]

As is clear from the above description, in the magneto-optical recording magnetic head of the present invention, the magnetic head portion is elastically supported by the support while eliminating the parts of the gimbal plate itself which have been treated as a single item. Since the support is integrated with the bobbin by insert molding or the gimbal is formed integrally with the support, it is possible to accurately hold both of them with an adhesive or the like, and it is easy to assemble. It is possible to avoid such problems. This allows
According to the present invention, the number of parts can be reduced, the assembling process can be simplified and the manufacturing cost can be reduced, and since the assembling process by adhesion is eliminated, the accuracy and reliability can be improved.

Further, according to the magnetic head for magneto-optical recording of the present invention, it is possible to provide the terminal portion for entwining the coil end without being restricted by the bobbin shape, and the protruding position and directionality of the terminal portion. The degree of freedom in designing for etc. can be expanded.

On the other hand, according to the method of manufacturing the magnetic head for magneto-optical recording of the present invention, in addition to the workability of the support, the handling of the parts, particularly the setting during insert molding can be performed easily and accurately. The magnetic head for magneto-optical recording of the present invention can be manufactured more rationally.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an example of a magnetic head for magneto-optical recording according to a first embodiment.

2 is a perspective view showing a support of the magneto-optical recording magnetic head of Example 1. FIG.

FIG. 3 is a perspective view showing a state in which a support of the magneto-optical recording magnetic head of Example 1 is insert-molded into a bobbin and integrated.

FIG. 4 is a perspective view showing a state where a support and a bobbin of the magneto-optical recording magnetic head of Example 1 are integrated and then a magnetic core is incorporated.

FIG. 5 is a perspective view showing a modified example of the support of the magneto-optical recording magnetic head of the first embodiment.

FIG. 6 is a perspective view showing a support of the magneto-optical recording magnetic head of Example 2.

FIG. 7 is a perspective view showing a state in which a support of the magneto-optical recording magnetic head of Example 2 is insert-molded into a bobbin and integrated.

8 is a perspective view showing a support of the magnetic head for magneto-optical recording of Example 3. FIG.

FIG. 9 is a perspective view showing a state in which a support of the magnetic head for magneto-optical recording of Example 3 is insert-molded and integrated with a bobbin.

FIG. 10 is a perspective view showing a state in which a coil is wound around a bobbin of the magneto-optical recording magnetic head of Example 3;

FIG. 11 is a perspective view showing a state where a magnetic core is incorporated in the bobbin of the magneto-optical recording magnetic head of Example 3;

FIG. 12 is a perspective view showing a modified example of the support body of the magnetic head for magneto-optical recording according to the third embodiment.

13 is a perspective view showing a state in which the support of FIG. 12 is integrated with a bobbin by insert molding.

FIG. 14 is a perspective view showing an example of a magnetic head for magneto-optical recording of Example 4.

FIG. 15 is an exploded perspective view showing an example of a magneto-optical recording magnetic head of Example 4.

FIG. 16 is an exploded perspective view showing a modified example of the support of the magneto-optical recording magnetic head of the fourth embodiment.

FIG. 17 is a configuration diagram for explaining a magnetic field modulation type magneto-optical recording method.

FIG. 18 is an exploded perspective view showing an example of a conventional magnetic head for magneto-optical recording.

[Explanation of symbols]

 11, 41 ... Magnetic head part 12, 32, 42 ... Bobbin 13, 33, 43 ... Coil 14, 34, 44 ... Magnetic core 15, 25, 35, 45 ... Support 17 , 27, 37 ... Projection 16, 26, 36, 46 ... Single part 19, 39 ... Bridge 47 ... Gimbal 47a ... Through groove 49 ... Projection

Claims (10)

[Claims] 1. A magnetic head for magneto-optical recording in which a magnetic head part is mainly composed of a bobbin in which a coil is wound and a magnetic core is provided, and the bobbin is fixed to a sheet metal support, wherein the support is a bobbin. Having a pair of one piece portion and a projection portion formed on the opposite side of the one piece portion, the projection portion is integrated with the bobbin by insert molding, and through each of the projection portions. A magnetic head for magneto-optical recording, wherein the bobbin is elastically held. 2. The magnetic head for magneto-optical recording according to claim 1, wherein the support body has a terminal portion projecting from each of the terminal portions for entwining the ends of the coil. 3. A support member made of sheet metal having a pair of piece portions with a bobbin positioned between them, a bridge connecting these piece portions, and a protrusion formed on the opposite side of these piece portions. A step of integrating the support with a bobbin by insert molding, a step of assembling a coil and a magnetic core to the bobbin to form a magnetic head part, and the one part being electrically non-conducting And a step of cutting the bridge as described above. 4. A common bridge is provided with a pair of pieces, each having a protrusion for positioning a bobbin at one end on opposite sides thereof, depending on the number of bobbins on a common bridge so that the proximal ends are connected. And a plurality of steps at a predetermined interval, a step of integrating the pair of piece parts into each bobbin by insert molding, a step of assembling a coil and a magnetic core in each bobbin to form a plurality of magnetic head portions, A method of manufacturing a magnetic head for magneto-optical recording, comprising a step of cutting a connecting portion between each of the above-mentioned one portion and a bridge. 5. A pair of single-sided portions, each having a protruding portion for locating a bobbin between them on opposite sides, are provided on a common bridge depending on the number of bobbins so that these one ends are connected. And a plurality of steps at a predetermined interval, a step of integrating the pair of piece parts into each bobbin by insert molding, a step of assembling a coil and a magnetic core in each bobbin to form a plurality of magnetic head portions, A method of manufacturing a magnetic head for magneto-optical recording, comprising a step of cutting a connecting portion between each of the above-mentioned one portion and a bridge. 6. A magnetic head part comprises a bobbin in which a coil is wound and a magnetic core is provided, and a gimbal that elastically holds the bobbin and a support made of sheet metal that holds the gimbal are provided. A magnetic head for magneto-optical recording, wherein the gimbal is formed integrally with the support. 7. A magneto-optical recording magnetic head comprising a coil and a bobbin having a magnetic core therein, the coil being wound around the coil, and the magnetic head being fixed to the support. A magnetic head for magneto-optical recording, comprising one part and a gimbal between each part and connected via a protrusion. 8. A magnetic head for magneto-optical recording according to claim 7, wherein the gimbal has two U-shaped through grooves along the outer peripheral side. 9. The magnetic head for magneto-optical recording according to claim 7, wherein the magnetic head portion is elastically held with respect to the gimbal. 10. A step of forming a gimbal for elastically holding the magnetic head section through a projection between a pair of one-sided sections, and a step of assembling a coil and a magnetic core on a bobbin to form the magnetic head section. And a step of mounting the magnetic head portion on the gimbal.