JPH1125410A - Magnetic head and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the magnetic head of which the cost of the parts is reduced based on the simple structure and the manufacturing is simply conducted with high productivity despite of a small sized one, and its manufacture. SOLUTION: A support 1 holding a magnetic core 2 is made of a thin plate shaped non-magnetic metallic member. The support 1 has a section 9 which is 180 deg. folded and overlapped. The portion, which fits the core 2, is doubled. The supports 1 are formed by press processing the non-magnetic metallic member in the state that they are connected through connecting sections 13. In the production process, the supports 1 are used in the state that plural supports are connected together and plural magnetic heads are processed as batch until at least the middle process in plural processes from the begining of the assembly to the completion.

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 performing magnetic recording or reproduction of information on a magnetic recording medium,
The present invention relates to a magnetic head which is small and is suitable for use in, for example, a camera using a film with a magnetic storage unit, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a magnetic head used in a camera using a film with a magnetic storage unit writes one track,
The read / write head employs a structure as shown in FIG. As a manufacturing method thereof, a pair of core halves 2a, 2a constituting a magnetic core are assembled into a pair of die-cast core holders 19 made of zinc or the like, and the mating surfaces of the core halves 2a are ground. 2a, a winding bobbin 3 in which a coil winding is wound is incorporated between each other,
The core halves 2a are butted against each other with a spacer forming a magnetic gap therebetween, and inserted into the magnetic shield case 14 made of permalloy or the like.
Is inserted, and then epoxy resin is injected into the case 14 and cured. After the resin is cured, the film sliding surface of the head is cylindrically ground to a constant R shape, and the electrical characteristics are checked.

In the case of a one-track write-only head, a magnetic core incorporating a winding bobbin is inserted into a resin-molded case and pressed in one direction by a spring.
Epoxy resin is injected into the case and cured.

[0004]

However, since the magnetic head used in the above-described camera is very small, the workability of assembling the magnetic core and the winding bobbin and inserting it into the case is poor in the above-mentioned conventional example. In addition, the number of steps in the assembling process is increased, and the cost is increased. Also, since the amount of the epoxy resin injected into the case was very small, stable injection was difficult. In addition, since the product is small, it is difficult to handle, and it is difficult to attach it to a resin injection jig, a sliding surface grinding jig, a property check jig, and the like.

Further, since a pair of core holders 19 made of die-casting are used and the springs 20 are used, there is a problem that component costs are required.

Therefore, the object of the present invention is not limited to the above-described magnetic head for a camera, but it is possible to reduce the cost of parts with a simple structure, and to produce a magnetic head which can be manufactured easily and with high productivity even if it is small. It is to provide a method.

[0007]

According to the present invention, there is provided, in accordance with the present invention, a magnetic head having a support for holding a magnetic core, wherein the support is made of a thin plate of non-magnetic metal material. A structure in which a portion for fitting a magnetic core is folded at least twice or more, and the support is made of a thin plate-shaped non-magnetic metal material, and is elastically moved in a direction in which the magnetic core abuts through a magnetic gap. A structure having first and second bent portions that are pressed and clamped and a third bent portion for positioning the magnetic core in the track width direction is employed.

According to the present invention, there is provided a method of manufacturing the magnetic head according to the present invention, comprising the step of forming the support by pressing a thin non-magnetic metal material. Are formed in a state of being connected to a plurality. Then, a method is employed in which a plurality of supports formed in a connected state are used and at least a plurality of magnetic heads are assembled at least in the middle of a plurality of steps from assembly to completion of the magnetic head.

Further, a hoop material of a non-magnetic metal obtained by continuously processing a plurality of connected supports is used, and the hoop material is continuously connected at least in the middle of a plurality of steps from assembly to completion of the magnetic head. And a method of continuous supply.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Here, an embodiment of a magnetic head used in a camera using the above-described film with a magnetic storage unit and a method of manufacturing the same will be described.

[First Embodiment] A first embodiment of the present invention will be described with reference to FIGS.

First, the structure of the main part of the magnetic head will be described with reference to FIGS. FIG. 1 is a front view of a state in which a magnetic core fitted with a winding bobbin is incorporated in a support in a magnetic head manufacturing process, FIG. 2 is a plan view thereof, FIG. 3 is a left side view thereof, and FIG. It is a right side view.

1 to 4, reference numeral 1 denotes a support for holding a magnetic core, reference numeral 2 denotes a magnetic core, reference numeral 3 denotes a winding bobbin around which a coil winding is wound, and reference numeral 4 denotes a terminal mounted on the winding bobbin. .

The support 1 is formed by pressing a thin non-magnetic metal material into a shape shown in the drawing. Support 1
Is formed continuously with a connecting portion 13 extending horizontally to the right in FIG. 1, and this connecting portion 13 is cut off at the final stage of the head manufacturing process. As shown in FIG. 2, a pilot hole 5 used for press working is formed at the right end of the connecting portion 13.

The body portion of the support 1 excluding the connecting portion 13 is bent in a downward U-shape in FIG. 1, and the upper surface thereof is provided with a folding portion 9 which is bent by 180 ° and overlapped. I have. The magnetic core 2 and the winding bobbin 3 are fitted into holes 17 (see FIG. 7), which will be described later, formed on the upper surface where the folded portion 9 is provided.

Also, as shown in FIGS.
Embossed portions (projections) 6, 7 are provided on the left side surface of the main body portion. The embossed portions 6 and 7 are pressed against one inner surface of a magnetic shield case 14 (see FIG. 9) to which a main body portion of the support 1 in which the magnetic core 2 and the winding bobbin 3 are incorporated is fitted. This is for the purpose of inserting the support 1 into the case 14 by light press-fitting to position the support 1 in the case and to prevent the support 1 from coming off from the case.

As shown in FIG. 3, the support 1 has a U-shaped hole 21 (FIG.
(See FIG. 1), a flaky core pressing portion 10 is formed, on which an embossed portion 11 is formed and protrudes inward. The core pressing portion 10 presses the magnetic core 2 at the embossed portion 11 due to its elasticity.

On the other hand, in the magnetic core 2, a nonmagnetic spacer (thin film) 12 for forming a magnetic gap is sandwiched between the tip portions of the pair of core halves 2a, 2a shown in FIG.
The core halves 2a, 2a are configured to abut each other as shown in FIG.
Note that the state of FIG. 6 is a temporary butted state, and the core halves 2a, 2a are not fixed.

Next, a method for manufacturing the magnetic head of the present embodiment will be described. First, the processing steps of the support 1 will be described with reference to FIG.

The processing of the support 1 is performed by a progressive press working of a thin non-magnetic metal material. First, as shown in FIG. 7A, the connecting portion 1 having the pilot hole 5 described above is formed.
3. The shape of the support 1 having the U-shaped hole 21 forming the folded portion 9 and the core pressing portion 10 is punched from a non-magnetic metal material.

Next, the folded portion 9 is moved 180 degrees at the line L1.
゜ Bend and superimpose on the upper surface of the support 1 as shown in (b).

Next, as shown in FIG. 3C, a hole 17 is punched in a portion where the folded portion 9 is overlapped. The folded part 9 at this time
A crimped shape is provided if necessary to prevent floating of Hole 17
The width between the edges of the right and left ends 17a corresponds to the thickness of the magnetic core 2 with high accuracy, and the magnetic core 2 can be fitted without any gap. The width of the intermediate portion of the hole 17 is set to a size that allows the winding bobbin 3 to escape. The inner side surface of the right side edge of the hole 17 in the figure becomes a pressing reference surface 18 against which the magnetic core 2 is pressed by the pressing of the core pressing portion 10.

Next, as shown in FIG.
7 and 11 are formed.

Next, the support 1 with the connecting portion 13 shown in (e) is completed by bending by 90 ° at the lines L2, L3 and L4 in (d).

In FIG. 7, the support 1 is shown as being formed as a single unit. However, in practice, as shown in FIG.

Next, a process of assembling the magnetic head will be described.

First, the pair of core halves 2 shown in FIG.
spacers 1 for forming a magnetic gap between the tip portions of a and 2a
2, the rear portions of the core halves 2a, 2a are inserted into the winding bobbins 3, and the core halves 2a, 2a as shown in FIG.
To match. This match is a temporary match,
It is not fixed using adhesives.

Next, the magnetic core 2 (the core halves 2a, 2a) and the winding bobbin 3 temporarily butted are inserted into the holes 17 of the support 1 in FIG. Actually, as shown in FIG. 8, the magnetic core 2 and the winding bobbin 3 are inserted and fitted into the holes 17 of the plurality of supports 1 connected to each other.

Here, in the hole 17 of the support 1, the folded portion 9 overlaps and is doubled, and holds the side surface of the magnetic core 2 at twice the thickness of the non-magnetic metal material forming the support 1. Therefore, the inclination of the magnetic core 2 can be minimized, and the misalignment of the left and right core halves 2a, 2a can be minimized. Also, the core pressing part 10 causes the magnetic core 2 to move to the reference plane 1 at the embossed part 11 due to its own elasticity.
8 supports the magnetic core 2
At the same time, the magnetic core 2 can secure the butting force of the magnetic core 2, and even if the support 1 is moved, the magnetic core 2 does not shift. At this time, the amount of protrusion of the sliding surface of the magnetic core 2 on the magnetic recording medium (film) can be regulated with a simple jig.

Next, as shown in FIG. 9, the main body of the support 1 in which the magnetic core 2 and the winding bobbin 3 are assembled is inserted into the magnetic shield case 14. An opening 14a is formed on the upper surface in FIG. 9 of the case 14 which is a sliding surface of the magnetic recording medium, and the front end face of the magnetic core 2 where the magnetic gap is provided faces the opening 14a. At this time, by setting the outer size of the main body portion of the support 1 and the inner size of the magnetic shield case 14 to a size that fits both, the positional accuracy of the magnetic core 2 with respect to the case 14 can be secured. In particular, the embossed portions 6, 7 for preventing the support 1 from coming off press against one inner surface of the magnetic shield case 14, and the insertion of the support 1 into the case 14 is lightly press-fitted, and the support 1 is opposed to the embossed portions 6, 7. By being pressed against the inner surface of the case 14 on the side, variations in the dimensions of the case 14 and the support 1 can be absorbed, the positional accuracy of the magnetic core with respect to the case 14 can be secured, and the support 1 is held at an appropriate position in the case 14. Is done.

Next, a resin (not shown) is injected, filled, and cured into each of the magnetic shield cases 14 to which the support 1 is fitted as described above, and then, as shown in FIG. Then, the rear magnetic shield case 15 is fixed. The case 15 has a ground terminal 16 protruding therefrom.

Next, the top surface of the magnetic shield case 14 in FIG. 9 and the front end surface of the magnetic core 2 exposed from the opening 14a are ground into a cylindrical shape as the sliding surface of the magnetic recording medium. In consideration of this grinding direction, the connecting portion 13 between the magnetic core 2 and the support 1 is laid out as shown in FIG. When the grinding is completed, the magnetic head 22 is completed in a state where the plurality of magnetic heads 22 are connected by the connecting portion 13 as shown in FIG.

Further, after evaluating the electrical characteristics of the plurality of magnetic heads 22 to determine a good product or a defective product, the connecting portion 13
Is cut to obtain a single magnetic head 22 shown in FIG. 11, and the manufacturing process ends.

As described above, according to the method of manufacturing the magnetic head of the present embodiment, the magnetic core 2 and the winding bobbin 3 are assembled, Since the steps of insertion, resin filling, hardening, rounding, and property evaluation are performed collectively for each magnetic head, a plurality of jigs can be attached to each jig in each manufacturing process. Can be significantly reduced. Further, even if the product is very small, handling is facilitated by connecting a plurality of products, and the delivery of the product between the respective steps can be simplified.

The support 1 corresponds to an integrated body of a pair of conventional core holders and a spring for obtaining the core positioning and abutting force, and is formed by pressing a thin non-magnetic metal material. Since it can be formed at low cost, the cost of parts can be greatly reduced as compared with the conventional case. Further, the assembling process can be simplified in that the conventional spring does not need to be incorporated.

In the above description, the portion where the magnetic core 2 of the support 1 is fitted is doubled by overlapping the folded portion 9. However, the shape of the folded portion 9 is enlarged, and the folded portion 9 is folded twice or more. May be tripled or more. Further, in the above description, all the processes from assembling to completion of the magnetic head are collectively performed for each of the plurality of magnetic heads by using the support 1 formed in a plurality of connected states. Is a support 1 during the entire process
May be cut, and the subsequent steps may be performed for each magnetic head.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. In these drawings, common or corresponding parts to those in FIGS. 1 to 11 of the first embodiment are denoted by common reference numerals, and description of the common parts is omitted.

First, the structure of the main part of the magnetic head will be described with reference to FIGS. FIG. 12 is a plan view showing a state in which a magnetic core 2 in which a winding bobbin 3 is fitted to each of a plurality of supports 1 connected in the middle of a manufacturing process of a magnetic head is incorporated, and FIG. FIG. 14 is a side view as seen from the direction of arrow B in FIG. 12.

In this embodiment, the structures of the magnetic core 2 and the winding bobbin 3 are the same as those of the first embodiment shown in FIGS. 5 and 6, but the structure of the support 1 is as follows. So different.

That is, the main body portion of the support 1 excluding the connecting portion 13 is substantially 90
Three bent parts 23, 2 bent so as to stand up at ゜
4, 26 are formed. In addition, 25 is a hole of the mark which cut and bent the bent part 24. The bent portions 23 and 24 are opposed to each other, and form a pair of core halves 2a,
2a (see FIG. 5) is elastically pressed in a direction in which the magnetic cores 2a abut each other via a magnetic gap to clamp the magnetic core 2. Bending part 2
Reference numeral 6 denotes a track disposed between the magnetic core 2 and the winding bobbin 3 by contacting the winding bobbin 3 fitted to the magnetic core 2 with the bending portion 26. The position in the width direction is determined.

A ground terminal 16 is formed on the main body of the support 1.

The structure of the other parts is common to that of the first embodiment.

Next, a method for manufacturing the magnetic head of the present embodiment will be described.

First, a band-shaped hoop material in which an elastic thin plate-shaped non-magnetic metal material is continuous is pressed, and FIG.
The main body portion of the support 1 having the bent portions 23, 24, 26 and the ground terminal 16 shown in FIG. 3 is continuously processed through the connecting portion 13 having the pilot hole 5.
Using the hoop material processed in this manner, the hoop material is continuously supplied to the configuration of the production line shown in FIG. 17 to continuously and consistently manufacture the magnetic head.

In FIG. 17, reference numeral 31 denotes a hoop material feeder for supplying the hoop material 30 obtained by processing the support 1 as described above, and 32 denotes a set in which a magnetic core and a winding bobbin are incorporated in the main body of the support 1 of the hoop material 30. An embedding machine 33 is a resin sealing molding machine for fixing the core portion. Numeral 34 denotes a magnetic shield case inserter, which is not required when a magnetic shield is not required. 35 is a grinding machine for grinding the magnetic recording medium sliding surface of the magnetic head, 36 is an evaluation device for evaluating the electrical characteristics and the like of the magnetic head, 37 is a marking device, 38 is a device for separating the magnetic head from the hoop material and packing it in a box. It is. At the time of separation and packing, the heads determined to be defective by the evaluation of the evaluation device 36 are automatically separated. An apparatus 39 cuts and stocks the hoop material 30 from which the head has been cut off.

With such a configuration, the hoop material 30 processed as described above is fed from the hoop material feeder 31 to
, And continuously manufacture them as follows.

That is, first, the hoop material 3 is supplied from the feeder 31.
0 is sent to the incorporation machine 32, and the incorporation machine 32 inserts the pair of core halves 2a, 2a described above into the winding bobbin 3 and butt them through a spacer for forming a magnetic gap. The support 1 is inserted into the core holding portion surrounded by the bent portions 23, 24, 26. At this time, the bent part 26
Is used as a position reference to determine the position of the magnetic core 2 in the track width direction, and the bent portions 23 and 24 elastically press the core halves in a direction in which the core halves abut each other to clamp the magnetic core 2.

Then, the main body of the support 1 in which the magnetic core 2 and the winding bobbin 3 of the hoop material 30 are assembled is resin-sealed by injection molding. Here, the hoop material 30 is fed into the mold of the resin sealing molding machine 33, and the main body of the support 1 is accurately held by a pin or the like provided in the mold with reference to the pilot hole 5, and in this state, the resin (Thermosetting resin or thermoplastic resin) is injected under pressure and cured.

As a result, a molded product in which the magnetic core 2 is sealed with high positional accuracy can be formed, and at the same time, since the magnetic core 2 is held by the resin, the movement of the magnetic gap is eliminated. Since the supports 1 are provided at an equal pitch,
It is also possible to simultaneously mold many pieces.

Next, the magnetic shield case is inserted into the magnetic shield case inserter 34, and the magnetic shield case 14 and the rear magnetic shield case 15 shown in FIG. Here, the step of inserting the magnetic shield case 14 can be brought to a step before the resin sealing molding. Further, the magnetic shield case 14 can be directly inserted into the sealing mold. Also, the magnetic shield case can be eliminated in the one-track write head.

Next, the hoop material 30 is sent to a grinder 35,
The front surface of the inserted magnetic shield case 14 and the front end surface of the magnetic core 2 exposed in the opening provided therein are ground as a magnetic recording medium sliding surface. At this time, the cleaning step can be eliminated by performing dry grinding using tape wrap. When this step is completed, the magnetic heads 22 are completed with the plurality of magnetic heads 22 connected by the connecting portion 13 as shown in FIG.

Next, the evaluation device 36 evaluates the electrical characteristics of the magnetic head, and discriminates a good product from a bad product.

Next, a marking such as a production lot is performed on the magnetic head by the marking device 37. Since the magnetic heads are arranged at equal pitches here, automation is easy.

Next, the connecting portion 1 of the hoop material 30 is
3, and the magnetic head is cut into a single unit as shown in FIG. 16 and packed in a box. At this time, defective heads are selected based on a signal from the evaluation device 36. In addition, it is possible to easily perform the separation based on the characteristic difference of the magnetic head.

Next, the hoop material 30 is cut into an appropriate size by the device 39 and stored.

According to the above-described embodiment, since the core halves of the magnetic core 2 are forcibly butted against each other by the elastic force of the bent portions 23 and 24 of the support 1, the dimensional variation of the magnetic gap is suppressed. Can be. Further, the fixing of the core halves with welding, an adhesive or the like can be eliminated, and a separate spring for butt is not required.

Further, since the magnetic core 2 and the winding bobbin 3 are positioned in the track width direction by the bent portion 26 of the support 1, the positioning of the head in the mold in the sealing molding process can be easily performed. And a plurality of simultaneous positioning moldings can be performed. Further, since the position of the magnetic core is stabilized, the characteristics of the magnetic head are also stabilized and improved.

Further, by forming the support 1 continuously on the hoop material 30, a magnetic core / winding bobbin assembling step,
Each step of magnetic shield case insertion process, resin encapsulation molding process, sliding surface grinding process, characteristic evaluation process, marking process, separation and alignment process is made an integrated line, and hoop material is continuously supplied to it for continuous processing It is possible to achieve a significant reduction in the number of processing steps.

Further, by using the injection molding method in the resin encapsulating step, the curing time by the conventional epoxy resin casting required about 10 hours in the curing furnace, but the core was inserted into the mold and the resin injection was performed. , One cycle including cooling out 2
It is possible in about 0 seconds. Support 1 for hoop material 30
Is processed with a high degree of accuracy, so that a plurality of can be simultaneously inserted and molded into a sealing mold, and the number of steps can be greatly reduced.

Further, since the ground terminal 16 is formed integrally with the support 1 by pressing the hoop material 30, a separate member for the ground terminal is not required, and the cost of parts can be reduced.

In the above embodiment, as shown in FIG. 12, the hoop material is processed so that the connecting portion 13 is continuous only on one side of the main body portion of the support 1, but is changed to FIG. As shown as an example, the hoop material may be processed so that the connecting portions 13 are continuous on both sides of the main body of the support 1. In such a case, the use amount of the hoop material increases and the material cost increases, but the positioning of the support 1 by the pilot hole 5 and the feeding of the hoop material are stabilized.

In the above embodiment, the core portion is sealed with resin by injection molding. However, an epoxy resin or the like may be cast into the magnetic shield case as in the conventional case.
FIG. 19 shows the configuration of the manufacturing line in that case.

In this case, the hoop material obtained by continuously processing the support 1 as described above is sent from the hoop material feeder 31 to the assembling machine 32, and the assembling machine 32 supports the magnetic core 2 and the winding bobbin 3. After inserting it into the main part of the case,
Then, the magnetic shield case is inserted into the core holding portion of the support 1. Next, it is sent to a casting device 41, and after casting an epoxy resin or the like into the magnetic shield case, it is sent to a cutting device 42, and the hoop material has a short length of a predetermined length corresponding to a plurality of supports (a plurality of magnetic heads). Cut into pieces. Further, the short material is sent to the storage device 43 and set on a curing jig. Then, the process proceeds to the next resin curing step. Subsequent steps are performed collectively for each of the plurality of magnetic heads held on the short material.

With such a configuration, automatic casting of an epoxy resin or the like is possible.

By the way, it goes without saying that the manufacturing process of the magnetic head of the first embodiment can be similarly performed by the manufacturing line of FIG. 19 using the hoop material in which the support is continuously processed.

[0066]

As is apparent from the above description, according to the present invention, in a magnetic head having a support for holding a magnetic core, the support is made of a thin non-magnetic metal material, and the magnetic core is At least 2 mating parts
The structure folded more than weight, and the support,
First and second bent portions made of a thin plate-shaped non-magnetic metal material and elastically pressing and holding the magnetic core in a direction in which the magnetic core abuts via a magnetic gap, and positioning the magnetic core in a track width direction. Therefore, the structure having the third bent portion is adopted, so that the number of parts can be reduced and the parts cost can be reduced with a simple structure.

In the method of manufacturing a magnetic head according to the present invention, the support can be formed at low cost by forming the support by pressing a thin non-magnetic metal material. In addition, a method in which the support is formed in a state where a plurality of the supports are connected to each other, and the support is used, and at least in the middle of a plurality of steps from the assembly to the completion of the magnetic head, a plurality of the magnetic heads are collectively performed.
And using a hoop material of a non-magnetic metal that is processed continuously the support in a plurality of connected state, continuously supplying the hoop material at least in the middle of a plurality of processes from assembly of the magnetic head to completion By adopting a continuous method, even if the product is small, it can simplify the mounting of the product to the jig in each step of the manufacturing process and greatly reduce the man-hour, and the handling of the product is extremely An excellent effect that productivity is greatly improved and cost reduction can be achieved by facilitating or automating the process can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a magnetic core is incorporated in a support in a manufacturing process of a magnetic head according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the same state.

FIG. 3 is a left side view showing the same state.

FIG. 4 is a right side view showing the same state.

FIG. 5 is a front view of a pair of core halves and a winding bobbin constituting a magnetic core of the magnetic head of the embodiment.

FIG. 6 is a front view of a magnetic core and a winding bobbin formed by abutting the core halves.

FIG. 7 is an explanatory diagram showing a processing step of forming a support of the magnetic head of the embodiment.

FIG. 8 is a plan view showing a state in which a magnetic core is incorporated in each of a plurality of connected supports in a manufacturing process of the magnetic head.

FIG. 9 is a cross-sectional view showing a state where a portion of the support incorporating the magnetic core is inserted into the magnetic shield case in the same manufacturing process.

FIG. 10 is a plan view showing a state in which a plurality of magnetic heads are completed in a connected state in the same manufacturing process.

FIG. 11 is a top view, a front view, and a side view of a single magnetic head obtained by cutting a connecting portion in the same manufacturing process.

FIG. 12 is a plan view showing a state in which a magnetic core is incorporated into each of supports formed continuously with a hoop material in a manufacturing process of the magnetic head of the second embodiment.

FIG. 13 is a side view as viewed from the direction of arrow A in FIG.

FIG. 14 is a side view seen from the direction of arrow B in FIG. 12;

FIG. 15 is a plan view showing a state in which a plurality of magnetic heads are completed in a connected state in the same manufacturing process.

FIG. 16 is a top view, a front view, and a side view of a single magnetic head obtained by cutting a connecting portion in the same manufacturing process.

FIG. 17 is an explanatory diagram showing a configuration of a consistent manufacturing line that executes the manufacturing process.

FIG. 18 is a plan view showing a state in which a magnetic core is incorporated in each of supports formed continuously with the hoop material in a modification of the embodiment.

FIG. 19 is an explanatory diagram showing a configuration of a production line according to a modification of the embodiment.

FIG. 20 is a sectional view showing the structure of a conventional magnetic head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support 2 Magnetic core 3 Winding bobbin 4 Terminal 5 Pilot hole 6, 7, 11 Emboss part 9 Folding part 10 Core pressing part 12 Spacer 13 Connecting part 14 Magnetic shield case 15 Rear magnetic shield case 16 Earth terminal 22 Magnetic head 30 Hoop material 31 Hoop material feeder 32 Core and bobbin assembling machine 33 Resin molding machine 34 Case insertion machine 35 Sliding surface grinding machine 36 Characteristic evaluation device 37 Marking device 38 Head separation and box packing device 39 Hoop material cut and storage Device 41 Resin casting device 42 Hoop material cutting device 43 Hoop material storage device

Claims (13)

[Claims] 1. A magnetic head having a support for holding a magnetic core, wherein the support is made of a thin non-magnetic metal material, and a portion for fitting the magnetic core is folded at least twice or more. A magnetic head comprising: 2. The support according to claim 1, wherein a hole for fitting the magnetic core and a pressing portion for elastically pressing the magnetic core against an inner surface of one side edge of the hole are formed in the support. The magnetic head according to claim 1. 3. A magnetic shield case which fits and accommodates the support incorporating the magnetic core, wherein the support is pressed against one inner surface of the magnetic shield case to prevent the support from coming off. The magnetic head according to claim 1, wherein a protrusion is formed. 4. A magnetic head having a support for holding a magnetic core, wherein the support is made of a thin non-magnetic metal material, and is elastically pressed in a direction in which the magnetic core abuts via a magnetic gap to clamp the magnetic core. A magnetic head comprising: a first and a second bent portion; and a third bent portion for positioning the magnetic core in a track width direction. 5. The magnetic head according to claim 4, wherein a ground terminal is formed integrally with the support. 6. The method for manufacturing a magnetic head according to claim 1, further comprising a step of pressing the thin non-magnetic metal material to form the support. A method for manufacturing a magnetic head. 7. The method according to claim 6, wherein in the step of forming the support, a plurality of the supports are formed in a connected state. 8. The method according to claim 1, wherein the plurality of supports formed in a connected state are used, and a plurality of magnetic heads are collectively performed at least in the middle of a plurality of steps from assembly to completion of the magnetic head. Item 8. The method for manufacturing a magnetic head according to Item 7. 9. A non-magnetic metal hoop material obtained by continuously processing the plurality of connected supports, and the hoop material is continuously connected at least in the middle of a plurality of steps from assembly to completion of the magnetic head. 8. The method for manufacturing a magnetic head according to claim 7, wherein the magnetic head is continuously supplied. 10. A non-magnetic metal hoop material obtained by continuously processing a plurality of connected supports, and the hoop material is continuously connected to a predetermined process in a plurality of processes from assembly to completion of the magnetic head. 8. The method according to claim 7, wherein the hoop material is continuously supplied, and then the hoop material is cut into a predetermined length corresponding to the plurality of supports, and the subsequent steps are performed collectively for a plurality of magnetic heads. 3. The method for manufacturing a magnetic head according to claim 1. 11. The step of incorporating a magnetic core and a winding bobbin into the support, the step of inserting a part incorporating the magnetic core and the winding bobbin into the magnetic shield case, the step of: Sealing the portion incorporating the winding bobbin with resin, grinding the magnetic recording medium sliding surface of the magnetic head, evaluating the electrical characteristics of the magnetic head, marking the magnetic head, and The method for manufacturing a magnetic head according to any one of claims 8 to 10, further comprising at least a part of a step of cutting the connecting portion. 12. The method according to claim 11, wherein the step of sealing with a resin is performed by injection molding. 13. The method according to claim 11, wherein the step of sealing with the resin is performed by casting the resin into the magnetic shield case.