JPH09161214A - Magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of parts and to obtain a lightweight head by integrally molding coil bobbins and a slider of resins. SOLUTION: A slider part 9 is composed of a contact surface S1 which faces the magnetic gap of the magnetic head 1 and a contact surface 2 which constitute the surface to bring the magnetic gaps 2, 3 into contact with the disk together with an air groove 9a for stabilizing the traveling with the disk, a slider apart 13 and a core part 4 and which surfaces are arranged to face each other via the disk when the head is packaged on a floppy disk drive. A molding part 14 is formed by integrally molding a base plate part 10 for mounting the core part 14 and the slider part 9, the bobbins 11 and 12 to be wound with coils 7 and 8, a contact surface S3 of the core part 4 and a contact surface S4 constituting the surface contact with the disk together with the contact surfaces S1, S2 of the slider part 9 by resins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head,
In particular, it relates to a magnetic head for recording / reproducing information on / from a recording medium such as an FDD.

[0002]

2. Description of the Related Art FIG. 10 shows an exploded perspective view of a conventional example. A conventional magnetic head 51 includes a recording / reproducing magnetic gap 52 for recording / reproducing a track, a core portion 54 having an erasing magnetic gap 53 for erasing both sides of the track, and a core portion coupled to the core portion 54. A recording / reproducing coil 55, an erasing coil 56, a recording / reproducing coil 55, and an erasing coil 56, which are magnetically coupled to 54, are wound,
The recording / reproducing coil 55 and the erasing coil 56 are connected to the core portion 5.
4, a recording / reproducing coil bobbin 57, an erasing coil bobbin 58, a back bar 59 magnetically coupled to the core portion 54 to form a magnetic path, and a back bar 59.
Backbar mounting clip 60 for crimping and holding to 4,
First and second slider halves 61 and 62, which sandwich the core portion 54 to form a surface facing the recording medium, a recording / reproducing magnetic gap 52, an erasing magnetic gap 53, and first and second slider halves 61 and 62.
Of the slider half 61, 62 and magnetic shield.

The core portion 54 is formed by combining magnetic blocks to form a recording / reproducing magnetic gap 52 and an erasing magnetic gap 53. On the side of the core portion 54,
The second slider halves 61, 62 are arranged to stabilize the contact with the recording medium. First slider half 6
When mounted on a floppy disk drive or the like, a slide surface 61a facing a magnetic gap of a magnetic head provided to face the floppy disk via a floppy disk.
In addition, the floppy disk is provided with the recording / reproducing magnetic gap 52 and the erasing magnetic gap 53 in cooperation with the air groove 61b for rectifying the air to stabilize the running of the magnetic head, the core portion 54, and the second slider half 62. It is composed of a slide surface 61c forming a slide surface to be brought into contact with.

The core portion 54 is adhered while being sandwiched between the first slider half body 61 and the second slider half body 62. The core portion 54 integrated with the first and second slider halves 61, 62 is inserted into the bobbin escape hole 64 of the shield portion 63 without contacting the shield portion 63, and the first and second slider halves are inserted. The bodies 61 and 62 are adhesively fixed to the upper surface of the shield portion 63.

Recording / reproducing coil 55, erasing coil 5
The recording / reproducing coil bobbin 57 and the erasing coil bobbin 58 are wound around with a conductive wire. Recording / reproducing coil bobbin 57, erasing coil bobbin 58
Is attached to the core portion 54 in a loose state, and causes the recording / reproducing coil 55 and the erasing coil 56 to magnetically act on the core portion 54. The recording / reproducing coil bobbin 57 and the erasing coil bobbin 58 are attached to the bobbin escape holes 64 of the core portion 54 and the shield portion 63 and shielded.

The back bar 59 is attached to the core portion 54 by a back bar attachment clip 60 after the recording / reproducing coil bobbin 57 and the erasing coil bobbin 58 are attached to the core portion 54. In addition, the shield portion 63 has a structure in which magnetic plates are laminated.

[0007]

However, in the conventional magnetic head, the recording / reproducing coil bobbin, the erasing coil bobbin, the first slider half body, the second slider half body, and the core portion are formed separately. However, since the number of parts is large, each part is required to have an appropriate strength, the weight cannot be reduced, and it is not possible to expect more followability to the media.

Further, since dimensional accuracy is required for each part and a large number of assembling steps are required, the yield cannot be improved and it is difficult to reduce the cost. The present invention has been made in view of the above points, and an object thereof is to provide a lightweight magnetic head having a small number of parts.

[0009]

According to a first aspect of the present invention, a core portion having a magnetic gap and a coil are wound,
In a magnetic head having a coil bobbin that engages with the core portion and a slider that holds the core portion and forms a surface facing the recording medium together with the core portion, the coil bobbin and the slider are integrally formed of resin. It is characterized by having done.

According to the first aspect, by integrally molding the coil bobbin and the slider with resin, the number of parts can be significantly reduced, the weight can be reduced, and the followability to the medium is improved. According to a second aspect of the present invention, the slider includes a first slider half that is arranged on one side of the magnetic gap of the core section and a second slider half arranged on the other side of the magnetic gap of the core section. The first slider half body is integrally formed of resin with the coil bobbin, and the second slider half body is separately formed.

According to a second aspect of the present invention, there is provided a second slider which faces a magnetic gap surface of a magnetic head provided via a magnetic medium when the magnetic head is mounted on a floppy disk.
In the case of the slider half body, the second slider half body is made of a ceramic material or a glass material that maintains a predetermined wear resistance, so that the manufacturing cost of the magnetic head can be significantly reduced.

According to a third aspect of the present invention, the second slider half is
It is characterized by being made of soda-lime glass. Claim 3
According to this, the manufacturing cost of the magnetic head can be significantly reduced by forming the second slider half body from soda lime glass, which is often used for general window glass and is inexpensive.

According to a fourth aspect of the present invention, there is provided a slider mounting portion which positions the second slider half body on the first slider half body and press-fits and fixes the second slider half body. According to the fourth aspect, the second slider half body can be positioned by attaching the second slider half body to the slider attachment portion, so that the second slider half body can be easily and highly accurately attached. .

According to a fifth aspect of the present invention, the terminal portion for holding one end of the coil is integrally formed of resin with the coil bobbin and the slider. According to claim 5, the terminal portion holding one end of the coil is a coil bobbin,
By integrally forming the slider together with the resin, it is not necessary to separately prepare the terminal portion, the number of parts can be reduced, the number of mounting steps can be reduced, and the manufacturing cost of the magnetic head can be significantly reduced.

According to a sixth aspect of the present invention, the terminal portion is formed in a triangular prism shape. According to the sixth aspect, since the terminal portion is formed into a triangular prism shape, the end of the coil can be easily cut by using the corner portion, which is advantageous in the case of automation.

According to a seventh aspect of the present invention, the core portion is insert-molded on the coil bobbin and the slider. According to the seventh aspect, since the core part is insert-molded at the time of molding the coil bobbin and the slider, the step of attaching the core part to the slider can be omitted, so that the productivity can be improved and the manufacturing cost of the magnetic head can be reduced.

According to an eighth aspect of the present invention, a resin-integral molded body including the coil bobbin and the slider is brought into contact with a mounting surface.
The point projections are formed on the resin-integrated molded body. According to claim 8, since the roughness of the surface of the resin-integrated molded body facing the mounting surface can be absorbed by bringing the protrusions into contact with the mounting surface at three points, it is not necessary to manage with high accuracy during resin molding. The yield is improved and the manufacturing cost can be reduced.

According to a ninth aspect, the resin is a liquid crystal polymer. According to the ninth aspect, by forming the resin with a liquid crystal polymer having excellent heat resistance, it is possible to perform high-temperature treatment such as solder dipping, improve productivity, and reduce manufacturing cost.

According to a tenth aspect, the core portion records / records information.
The recording / reproducing gap for reproduction and the erasing gap for erasing the recorded information side portion are provided, and the coil bobbin and the terminal are provided corresponding to the recording / reproducing gap and the erasing gap, respectively. The wire diameter and the number of turns of the coil wound around the coil, the number and arrangement of the terminals of the coil, and the winding arrangement to the terminals are coil bobbins and terminals corresponding to the recording / reproducing gap and the erasing gap. It is characterized in that the coil bobbin and the terminal corresponding to are the same.

According to the tenth aspect, the coil winding diameter, the number of windings, the number of terminals of the coil, the arrangement of the recording / reproducing coil and coil bobbin and the erasing coil and coil bobbin,
Also, by making the arrangement of the windings to the terminals the same, the recording / reproducing coil and the erasing coil can be formed in the same operation, and therefore, a plurality of coils can be wound in one operation. And the manufacturing cost can be reduced.

An eleventh aspect of the present invention is characterized in that the contact surface with the medium constituted by the slider and the core portion is one continuous flat surface and is formed flat. According to the eleventh aspect, since the contact surface for contacting the medium constituted by the slider and the core portion is one continuous flat surface and is formed flat, the contact surface can be easily molded. And the manufacturing cost can be reduced.

[0022]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention, and FIG. 2 is an assembly view of the first embodiment of the present invention. The magnetic head 1 of this embodiment is a composite magnetic head mounted on a floppy disk drive and arranged on both sides of the floppy disk, and a contact surface with the floppy disk is provided to face the floppy disk. The magnetic head 1 has a recording / reproducing magnetic gap for magnetically recording / reproducing information on a floppy disk and an erasing magnetic gap for forming track gaps on both sides of a recording track when recording information on the floppy disk. Are integrally formed.

The magnetic head 1 includes a core portion 4 having a recording / reproducing magnetic gap 2 and an erasing magnetic gap 3 formed therein, a back bar 5 held by the core portion 4 and forming a magnetic permeability path together with the core portion 4, and a back. A back bar clip 6 for holding the bar 5 in the core portion 4, a recording / reproducing coil 7 for generating magnetism in the core portion 4 and detecting the magnetism generated in the core portion 4, an erasing coil 8; The first slider portion 9 corresponds to the second slider half body and forms the contact surfaces S1 and S2 with the core portion 4 for contact with the floppy disk, and corresponds to the first slider half body in the claims for recording / reproducing. Coil bobbins 11 and 12 around which the coil 7 and the erasing coil 8 are wound.
And a base portion 10 to which the core portion 4 and the first slider portion 9 are attached, a second slider portion 13 that forms a contact surface with the floppy disk together with the core portion 4 and the first slider portion 9 are integrally formed. The mold portion 14 and the shield ring 15 that shields the leakage magnetic flux.

When mounted in a floppy disk drive, the magnetic gap 2 constitutes, for example, a magnetic gap for recording / reproduction for recording / reproducing information, and the magnetic gap 3 is mounted in a floppy disk drive, for example,
An erasing magnetic gap is formed to erase information.

When mounted on a floppy disk drive, the first slider section 9 stabilizes the contact surface S1 opposed to the magnetic gap of the magnetic head arranged opposite to the floppy disk drive, and the traveling to the floppy disk. The air groove 9a, the second slider portion 13, and the core portion 4 are constituted by a contact surface S2 which constitutes a surface for contacting the magnetic gaps 2 and 3 with the floppy disk.

The core portion 4 is composed of magnetic blocks 4a and 4b.
The magnetic block 4 is formed by assembling b ₁ , 4b ₂ and 4c into a substantially E shape with a nonmagnetic layer or the like interposed therebetween.
An erasing magnetic gap 3 and a recording / reproducing magnetic gap 2 are formed at the joints of a, 4b ₁ , 4b ₂ , and 4c. The erasing magnetic gap 3 and the recording / reproducing magnetic gap 2 are exposed on the contact surface S3 of the core portion 4 with the floppy disk.

The mold portion 14 includes a base portion 10 to which the core portion 4 and the first slider portion 9 are attached, coil bobbins 11 and 12 around which the coils 7 and 8 are wound, and a contact surface S3 of the core portion 4.
And a contact surface S4 forming a surface for contacting the floppy disk with the contact surfaces S1 and S2 of the first slider portion 9.
The second slider portion 13 in which is formed is integrally molded with resin.

FIG. 3 is a perspective view of the upper surface side of the mold portion of the first embodiment of the present invention, and FIG. 4 is a perspective view of the lower surface side of the mold portion of the first embodiment of the present invention. The mold portion 14 is formed by molding a resin material such as an aromatic polyester liquid crystal polymer having excellent heat resistance and mechanical strength. The base portion 10 has a substantially L-shaped side surface, and has an upper surface side (arrow A).
Direction), the recess 16 in which the first slider portion 9 is mounted, the through holes 17, 18, 19 formed in the bottom end of the recess 16 and into which the core portion 4 is inserted, the through holes 17, 18 of the recess 16,
19 is formed on the side surface opposite to the formed end,
Convex portions 20, 21 for crimping the slider portion 9 of the
22 is formed, and a pedestal portion 23 is formed on the back side (direction of arrow B).
Are formed.

Further, the R escape groove portions 1 for surely engaging with the first slider portion 9 are provided at both ends of the bottom surface of the recessed portion 16.
6a are formed. The second slider portion 13 is formed at the end of the base portion 10 where the through holes 17, 18, and 19 are formed so as to project from the surface of the base portion 10 in the upper surface direction (arrow A direction).

The coil bobbins 11 and 12 are formed on the back surface side of the base portion 10 and have a substantially cylindrical shape, and prevent the coil winding portions 24 and 25 around which the coils 7 and 8 are wound and the coils 7 and 8 from coming off. The head portions 26 and 27 are provided, and the through holes 17 and 19 penetrate the central axis.

The head portions 26, 27 have a fan-shaped notch 2
8 and 29 are provided, the through holes 17 and 19 are provided with the cutout portions 28,
It penetrates to 29. Further, the terminal portions 30- that wind and stop the end portions of the coils 7 and 8 around the end surfaces of the head portions 25 and 26.
1, 30-2, 30-3, 31-1, 31-2, 31-
3 and projections 32 and 33 for stabilizing the fixation to the gimbal plate.

Terminal portions 30-1, 30-2, 30-3, 3
Transverse cross-sectional shapes of 1-1, 31-2 and 31-3 are substantially triangular and are configured so that the wire rod can be easily cut at the corners when the wire rod is twisted. In addition, the pedestal portion 23 is formed with a protrusion 34 for stabilizing the fixing to the gimbal plate in cooperation with the protrusions 32 and 33 on the end face in the back surface direction (arrow B direction).

Now, a method of manufacturing the magnetic head 1 will be described. First, the mold part 14 is formed, and the coils 7 and 8 are wound around the coil bobbins 11 and 12 of the mold part 14. FIG. 5 shows a coil winding operation explanatory diagram of the first embodiment of the present invention.

The coils 7 and 8 are the automatic coil winding device 35.
Coil bobbins 11 and 12 and terminal portions 30-1 and 3
It is wound around 0-2, 30-3, 31-1, 31-2, 31-3. The coils 7 and 8 are the number of windings of the wire 36, the winding direction, the end of the wire 36 and the terminal portions 30-1, 30-2, 30.
-3, 31-1, 31-2, and 31-3 are set to have the same connection arrangement.

The automatic coil winding device 35 has nozzles 38, 3 for discharging the conductive wire 36 at the tip as shown in FIG.
9 is provided with a mounting plate 37 arranged at the same pitch as the pitch d of the coil bobbins 11, 12, the wire rod 36 is discharged from the nozzles 38, 39, and the mounting plate 37 is moved in the X, Y, Z directions. By moving and rotating in the direction of arrow C, the coil bobbins 11 and 12 and the terminal portion 30-
1, 30-2, 30-3, 31-1, 31-2, 31-
The wire 36 is wound around the wire 3 to form the coils 7 and 8.

In the winding operation, first, the terminal portions 30-1 and 31
After being twisted to -1, the mounting plate 37 is moved in the arrow Z direction while rotating in the arrow C direction, and the coil winding portions 24, 25 are moved.
The wire 36 is wound around. Next, the wire rod 36 is wound around the coil bobbins 11 and 12 a predetermined number of times, and then the terminal portion 30-
2, 31-2, and again the coil winding portion 24,
25 is wound a predetermined number of times, is entangled in the terminal portions 30-3 and 31-3, and the wire 3 is attached to the corner portions of the terminal portions 30-3 and 31-3.
In the state where 6 is hooked, the wire rod 36 is pulled and the wire rod 36 is cut.

After breaking the wire 36, the terminal portion 30-1,
30-2, 30-3, 31-1, 31-2, 31-3 are solder-dipped to connect the end portions of the wire 36 to the terminal portions 30.
-1, 30-2, 30-3, 31-1, 31-2, 31
Solder to -3. At this time, since the mold part 14 is made of an aromatic polyester liquid crystal polymer having excellent heat resistance, there is no risk of deformation due to heat during solder dipping.

The coils 7 and 8 are formed as described above. As described above, according to this embodiment, the coil bobbins 11, 1 are provided.
Since the two are integrally arranged in parallel, the wire rod 36 can be wound around the two coil bobbins 11 and 12 simultaneously, and the coils 7 and 8 can be efficiently formed.

The mold portion 14 has a coil bobbin 11,
After the coils 7 and 8 are wound around 12, the core portion 4 is mounted. FIG. 6 shows a perspective view of the first embodiment of the present invention when the core portion is mounted. The core part 4 includes magnetic blocks 4a and 4a.
b ₁ , 4b ₂ and 4c are inserted into the through holes 17, 18 and 19, and the magnetic gaps 2 and 3 are mounted so as to be exposed on the upper surface side. At this time, the core portion 4 and the mold portion 14 are designed such that the exposed surfaces of the magnetic gaps 2 and 3 of the core portion 4 and the upper surface of the second slider portion 13 are substantially aligned with each other.

Next, the first slider portion 9 is mounted in the recess 16 of the mold portion 14. FIG. 7 shows a perspective view of the first embodiment of the present invention when the slider is mounted. First slider section 9
Is made of a glass material such as soda-lime glass. The first slider portion 9 has a substantially rectangular parallelepiped shape, and an air groove 9a is formed at a position close to one side end portion of the upper surface thereof in the direction of arrow D, which is the rotation direction of the floppy disk.
When the first slider portion 9 is mounted in the recess 16,
An epoxy resin adhesive or the like is applied between the recess 16 and the first slider portion 9 so that the surface on which the air groove 9a is formed faces upward, and the side end portion on which the air groove 9a is formed is the core portion. 4, so that the other side end portion is brought into contact with the protrusions 20, 21, 2
Push in the direction of arrow E while hitting 2. At this time, the convex portions 20, 21 and 22 are elastically deformed slightly to move the first slider portion 9 toward the core portion 4 (in the direction of arrow E).
Press Therefore, the core portion 4 and the first slider portion 9
Are closely contacted with each other, and the core portion 4 and the first slider portion 9 are integrated. At this time, the first slider portion 9 and the concave portion 16 are securely fitted by the R escape groove portions 16a formed on both sides of the bottom surface of the concave portion 16.

Next, the surface facing the floppy disk is ground and chamfered. Next, the back bar 5 is attached to the core portion 4. FIG. 8 shows a perspective view of the first embodiment of the present invention when the back bar is attached. The back bar 5 is made of the same magnetic material as the magnetic material block 4, and is magnetically coupled to the magnetic material block 4 to form a magnetic permeability path. When attaching the back bar 5 to the core portion 4, first, as shown in FIG. 8, the back bar 5 is attached to the notches 28 and 2 of the coil bobbins 11 and 12.
Magnetic substance blocks 4a, 4b ₁ and 4b ₂ protruding from 9
4c is arranged so as to abut on the side portion of the magnetic block 4c by the back bar mounting clip 6 as shown in FIG.
_{a, 4b 1, 4b 2,} 4c sandwiched with magnetic blocks 4a, is crimped and fixed to 4b _1, 4b _2, 4c.

Next, the mold portion 14 is attached to the shield ring 1
The magnetic head 1 is completed by mounting the magnetic head 1 on the substrate 5 and fixing it with an adhesive. At this time, the shield ring 15 is
4 is mounted, the first and second slider portions 9 and 13 and the core portion 4 project from the top surface side, and the projection portions 32, 33 and 34 project from the back surface side. There is.

Next, the attachment of the magnetic head 1 to the gimbal plate will be described. FIG. 9 shows a sectional view of the magnetic head of the first embodiment of the present invention mounted on a gimbal plate. The magnetic head 1 is attached to the gimbal plate 40.
The holes 41 are formed through which the terminal portions 30-1 to 30-3 and 31-1 to 31-3 of the magnetic head 1 pass when the magnetic head 1 is mounted at a predetermined mounting position. The terminal portion 30 is provided in the hole portion 41.
-1 to 30-3 and 31-1 to 31-3 penetrate therethrough, and the protrusions 32, 33, 3 are formed on the mounting surface of the gimbal plate 40.
4 is abutted.

When mounting the magnetic head 1 on the gimbal plate 40, the resin 42 is applied between the peripheral portion of the magnetic head 1 and the mounting surface of the gimbal plate 40, and the resin 4 is applied.
2 is fixed, attached and fixed. At this time, the gimbal plate 40 and the magnetic head 1 have the protrusions 32, 3
Contact at 3 points of 3, 34.

Therefore, even if the precision of the back surface of the mold portion 14 is poor, it can be stably fixed to the gimbal plate 40.
Although the first slider portion 9 is made of soda-lime glass in this embodiment, the present invention is not limited to this, and it may be made of a material such as ceramics that has been conventionally used as a slider.

In this embodiment, the core portion 4 is mounted after the mold portion 14 is formed.
May be insert-molded when the mold part 14 is molded. Since the core portion 4 is insert-molded, the step of mounting the core portion 4 on the mold portion 14 is omitted, and the magnetic head can be manufactured efficiently.

Further, in the present embodiment, the first slider section 9
The air groove 9a for stabilizing the traveling of the magnetic head 1 is provided in the magnetic head 1. However, the magnetic head 1 of the present embodiment has a structure in which the contact surface with the medium is minimized by minimizing the contact surface with the medium. Therefore, stable running of the magnetic head can be realized without the air groove 9a. Air groove 9a
Since the manufacturing process of the air groove 9a can be omitted by not providing the, the manufacturing cost can be reduced.

[0048]

According to the first aspect of the present invention, by integrally molding the coil bobbin and the slider with resin, the number of parts can be significantly reduced, the weight can be reduced, and the followability to the medium can be improved. It has features such as improvement.

According to the second aspect, when the magnetic head is mounted on the floppy disk, the slider facing the magnetic gap surface of the magnetic head provided via the magnetic medium is the second slider.
In the case of the slider half body, the second slider half body is made of a ceramic material or a glass material that maintains a predetermined wear resistance, so that the manufacturing cost of the magnetic head can be significantly reduced. .

According to the third aspect, the second slider half body is made of soda-lime glass, which is often used for general window glass and is inexpensive, and thus the manufacturing cost of the magnetic head can be significantly reduced. Has features. According to the fourth aspect, the second slider half body can be positioned by attaching the second slider half body to the slider attachment portion, so that the second slider half body can be easily and highly accurately attached. It has features such as

According to the present invention, the terminal portion for holding one end of the coil is integrally formed of resin with the coil bobbin and the slider. Therefore, it is not necessary to separately prepare the terminal portion, and the number of parts can be reduced. The advantages are that the number of mounting steps can be reduced, and the manufacturing cost of the magnetic head can be significantly reduced.

According to the sixth aspect, since the terminal portion is formed into a triangular prism shape, the end of the coil can be easily cut by using the corner portion, which is advantageous in the case of automation. Have. According to the seventh aspect, since the step of attaching the core portion to the base can be reduced by insert-molding the core portion when molding the coil bobbin and the slider, productivity can be improved and the manufacturing cost of the magnetic head can be reduced. It has features such as

According to the eighth aspect, since the roughness of the surface of the resin-integral molded body facing the mounting surface can be absorbed by bringing the mounting surface into contact with the mounting surface at three points, it is possible to manage with high accuracy during resin molding. It is not necessary, and has features such as improved yield and reduced manufacturing cost.

According to the ninth aspect, the resin is made of a liquid crystal polymer having excellent heat resistance, so that high temperature treatment such as solder dipping becomes possible, productivity can be improved, and manufacturing cost can be reduced. Have. According to the tenth aspect, the recording / reproducing coil and the coil bobbin and the erasing coil and the coil bobbin have the same coil winding diameter, the number of windings, the number of terminals of the coil, the arrangement, and the winding arrangement to the terminals. As a result, the recording / reproducing coil and the erasing coil can be formed in the same operation, and therefore, a plurality of coils can be wound in one operation, so that productivity can be improved,
It has features such as reduced manufacturing costs.

According to the eleventh aspect, the contact surface for contacting the medium composed of the slider and the core portion is formed as one continuous flat surface and is flat, so that the contact surface can be easily molded. Therefore, it has features such that productivity can be improved and manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is an assembly view of the first embodiment of the present invention.

FIG. 3 is a perspective view of the front surface side of the mold part according to the first embodiment of the present invention.

FIG. 4 is a perspective view of the back surface side of the mold unit according to the first embodiment of the present invention.

FIG. 5 is a diagram for explaining the winding operation of the coil according to the first embodiment of the present invention.

FIG. 6 is a perspective view of the core unit according to the first embodiment of the present invention when mounted.

FIG. 7 is a perspective view of the first embodiment of the present invention when the slider is mounted.

FIG. 8 is a perspective view of the first embodiment of the present invention when the back bar is attached.

FIG. 9 is a sectional view of the magnetic head according to the first embodiment of the present invention mounted on a gimbal.

FIG. 10 is an exploded perspective view of an example of a conventional magnetic head.

[Explanation of symbols]

 1 Magnetic Head 2, 3 Magnetic Gap 4 Magnetic Block 5 Back Bar 6 Back Bar Mounting Clip 7, 8 Coil 9 First Slider Part 10 Base 11, 11 Coil Bobbin 13 Second Slider Half 14 Mold Part 15 Shield Ring 16 recess

Claims (11)

[Claims] 1. A core portion having a magnetic gap, a coil bobbin around which a coil is wound and which engages with the core portion,
A magnetic head having a slider that holds the core portion and forms a surface facing a recording medium together with the core portion, wherein the coil bobbin and the slider are integrally molded of resin. 2. The slider comprises: a first slider half arranged on one side of the magnetic gap of the core section; and a first slider half arranged on the other side of the magnetic gap of the core section. The second slider half body is formed integrally with the coil bobbin by a resin, and the second slider half body is formed as a separate body. Item 1. The magnetic head according to Item 1. 3. The magnetic head according to claim 2, wherein the second slider half body is made of soda-lime glass. 4. The magnetic head according to claim 3, wherein the first slider half has a slider mounting portion for positioning and press-fitting and fixing the second slider half. 5. The magnetic head according to claim 1, wherein a terminal portion holding one end of the coil is integrally formed of resin with the coil bobbin and the slider. 6. The magnetic head according to claim 5, wherein the terminal is formed in a triangular prism shape. 7. The magnetic head according to claim 1, wherein the core portion is insert-molded on the coil bobbin and the slider. 8. The resin-integral-molded body is formed with three-point projections for abutting a mounting surface of the resin-integrated-molded body including the coil bobbin and the slider. A magnetic head as described in one item. 9. The magnetic head according to claim 1, wherein the resin is a liquid crystal polymer. 10. The core portion has a recording / reproducing gap for recording / reproducing information and an erasing gap for erasing the recorded information side portion, and the coil bobbin and the terminal are connected to the recording / reproducing gap and The recording / reproducing is provided corresponding to each of the erasing gaps, and the wire diameter and the number of turns of the coil wound around the coil bobbin, the number and arrangement of the terminals of the coil, and the winding arrangement to the terminals. 7. The magnetic head according to claim 5, wherein the coil bobbin and the terminal corresponding to the working gap are the same as the coil bobbin and the terminal corresponding to the erasing gap. 11. The contact surface for contacting a medium constituted by the slider and the core portion is one continuous flat surface and is formed flat. A magnetic head according to the item.