JPH02183414A - Manufacture of magnetic head for flexible disk - Google Patents

Abstract

PURPOSE:To eliminate the variance of joining strength by applying a paste-like adhesive agent consisting of glass powder and an organic compound solvent to the end face of a slider for inserting and holding a magnetic core assembly. CONSTITUTION:In order to fix sliders 10, 20 and a magnetic core assembly 30, a paste-like adhesive agent obtained by mixing glass powder into an organic compound solvent is applied to side faces 12, 24 in which the sliders 10, 20 and the assembly 30 come into contact with each other. Subsequently, the adhesive agent is dried and glass layers 12a, 22a are formed, and thereafter, the sliders 10, 20 are attached to a jig, the assembly 30 is inserted between the sliders 10, 20 and aligned, and the assembly 30 is inserted and pressed, and held by the sliders 10, 20. Also, by melting glass in a bond by heating, the sliders 10, 20 and the assembly 30 are joined. As a result, since the junction is executed enough, the variance of joining strength is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method of manufacturing a magnetic head for a disk drive device, and particularly to a method of manufacturing a magnetic head for a flexible disk.

[Prior art and its problems]

The magnetic head used in conventional flexible magnetic disk drive devices (also known as floppy disk drive devices) is a composite magnetic head (hereinafter referred to as a magnetic core head) that integrates a recording/reproducing magnetic head and an erasing magnetic head.
These composite magnetic heads are sandwiched and fixed by a pair of sliders in an assembly (referred to as an assembly). The structure of such a conventional magnetic head will be explained based on FIGS. 5 to 8.

This magnetic head includes a pair of sliders 60 and 70 made of a non-magnetic material such as ceramic non-magnetic ferrite, and the magnetic core assembly 8 sandwiched between the sliders.
has 0. Each slider 60° and 70 is separated from each other and extends vertically at approximately the center of the opposing joint surfaces! 61.71, and a side wall 62. which serves as a sliding wall extending along the side edge of the magnetic disk.
72, located on both sides of the separation wall 61.71, and the side wall 62.72.
66, 72, 75, and a recess 63, 64, 73, 74 formed by the separation wall 61.71. A coil bobbin 90 for a recording/reproducing magnetic head is accommodated in the space formed by the opposing recesses 63 and 73, and a coil bobbin 92 for an erasing magnetic head is similarly accommodated in the space formed by the opposing recesses 64 and 74. be done. Each coil bobbin 90.9
2 are wound with coils 91 and 93, respectively. A magnetic core assembly 80 is secured between the mating surfaces of the sliders 60, 70. Magnetic core assembly 8
0 consists of a composite of two sets of magnetic cores, one for the recording/reproducing magnetic head and the other for the erasing magnetic head, and each magnetic core is a single-shaped or C-shaped half core 81.82
and a single-character half core 83.84. Also,
Coil bobbins 90 and 92 are fitted into the half cores 81 and 82 of the magnetic core assembly 80, respectively, for recording and recording.
It constitutes a reproducing magnetic head and an erasing magnetic head.

Furthermore, half core 81.82 and half core 83.8
A back core 85 is attached to the upper end of 4, forming a closed magnetic circuit.

As is well known, this magnetic head is attached to a support arm of a head moving device and held at a predetermined position with respect to the disc, and is moved in the radial direction to record or reproduce data while tracing a predetermined recording track. shall be.

A conventional magnetic head having the above configuration is assembled in the following steps.

First, attach the slider 60.70 to the jig and attach the magnetic core.
Place the assembly 80 between the sliders 60 and 70, align the position, close the jig (not shown), and move the slider 60.
Pinch and hold at 70°C. Thereafter, a bonding agent such as low-melting glass synthetic resin is poured into the gap between the magnetic core assembly 80 and the slider 60, 70 to bond them.

After the bonding agent has hardened, a coil bobbin 90.92 is fitted into each half core 81.82 of the magnetic core assembly 80, and each is housed in the space formed by the recesses 63.73 and recesses 64 and 74.

Adhesive is then poured into the gap between the core hole of the coil bobbin 90.92 and the half-shaped aperture 81.82 to join them.

As the adhesive, an epoxy-based synthetic resin adhesive or the like is used.

Next, half core 81.82 and half core 83.84
After fixing the back core 85 to the upper end of the magnetic head with a bonding agent or a spring clip, the contact surfaces of the sliders 60 and 70 are polished to complete the magnetic head.

Note that 65 is a housing groove for a joining spring of the back core 85.

[Problem that the invention seeks to solve]

However, in the conventional magnetic head manufacturing method described above, in order to accurately position the slider 60.70 and the magnetic core assembly 80 during the bonding operation, the magnetic core assembly 80 is attached to the pair of sliders 60.70. The adhesive is injected into the magnetic core assembly 80 and the sliders 60 and 70 while being held under pressure. However, since the bonding agent is compressed, it is difficult for the bonding agent to flow in, resulting in variations in bonding strength and a lack of reliability.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems of the conventional magnetic head.
To obtain a magnetic head for a flexible magnetic disk, in which a bonding surface with an assembly is reliably filled with a bonding agent, there is no variation in bonding strength, the bonding strength is large, and the reliability is high.

[Means for solving problems]

Manufacture of a magnetic head for a flexible disk, in which a magnetic core assembly, in which a recording/reproducing magnetic core and an erasing magnetic core are integrally formed, and a pair of sliders made of a non-magnetic material are bonded using an adhesive.

In the method, a paste-like adhesive made by mixing glass powder and an organic solvent is applied to at least one joint surface of the magnetic core assembly and the pair of core sliders. The method of manufacturing a magnetic head for a flexible disk is characterized by comprising applying pressure and heat to melt the glass powder in the adhesive and bonding.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1(A) to 4(B).

Figures 1 (a) and (b) show cross-sectional views of the main parts of a magnetic head for flexible disks, and in particular, Figure 1 (b) shows the magnetic core.
FIG. 2 is a perspective view showing the pair of sliders of the present invention; FIG. 3 is a side sectional view of the magnetic head in FIG. FIG. 4 also shows a plan view seen from above.

The basic structure is almost the same as the conventional magnetic head described above.

This magnetic head has a pair of sliders made of ceramic non-magnetic ferrite, similar to the conventional example of sailing speed.
and a magnetic core assembly 30 sandwiched between the sliders. Each slider 10.20 has an M wall 11.21 extending in the vertical direction approximately at the center of the opposing joining surfaces, a side wall 12.22 serving as a contact wall extending along the side edge of the magnetic disk, and a separation wall 11.22. 21, and has four parts 13.14, 23.24 formed by side walls 12.16, 22.25 and the separation wall 11.21. side wall 1
2. Glass 12a is on the surface of 22.

22a is fixed. A coil bobbin 40 of a recording/reproducing magnetic head is accommodated in the space formed by the opposing recesses 13 and 23, and a coil bobbin 42 of an erasing magnetic head is similarly accommodated in the space formed by the opposing recesses 14 and 24. be done. Each coil bobbin 40.42 has a coil 41
．． 43 is wound. A magnetic core assembly 30 is secured between the mating surfaces of slider 10.20.

The magnetic core assembly 30 is composed of a composite of two sets of magnetic cores, a recording/reproducing magnetic head and an erasing magnetic head, and each magnetic core consists of a single-character or C-shaped half core 31, 32 and a single-character magnetic head. It is composed of half cores 33 and 34 shaped like each other. Further, each of the half cores 31 and 32 of the magnetic core assembly 30 has a coil bobbin 40.
42 is inserted to constitute a recording/reproducing magnetic head and an erasing magnetic head. Furthermore, a back core 35 is provided at the upper end of the half core 31.32 and the half core 33.34.
is attached to form a closed magnetic circuit.

As is well known, this magnetic head is attached to a support arm of a head transfer device and held at a predetermined position relative to the disk, and is moved in the radial direction to perform recording or reproduction while tracing a predetermined recording track. do.

The magnetic head having the above configuration is assembled in the following steps.

First, as shown in FIG. 2, the shape of the slider 10.20 is processed. Side surface 12.2 on slider 10.11
Glass 1112a is on the surface of 2.

22a is provided.

The glass layers 12a, 22a are made of SiO, which is a low melting point glass, or a glass material made of a plurality of metal oxides in 10 as the main material, and an organic solvent (for example, nitrocellulose) is used as the z1 material. The method for manufacturing the above-mentioned glass includes crushing the above-mentioned glassy substance and mixing it with an organic solvent.
Make it into a paste.

This paste-like glass is used as a bonding agent to attach the slider 1.
It is applied to the surface of the side surface 12.22 of 0.20 mm, and heated to remove an amount of the organic solvent and dry it.

Next, attach the slider 10.20 to the jig, and
The assembly 30 is placed between the sliders 10 and 20 and aligned, the jig is closed and the magnetic core assembly 30 is clamped and held by the sliders 10 and 20. The glass is then heated to bond the slider 10.20 and magnetic core assembly 30 together. Once the bonding agent has hardened, a coil bobbin 40.42 is fitted into each half 31.32 of the magnetic core assembly 30, and each is accommodated in the space formed by the recess 13.23 and the recesses 14,24.

And coil bobbin 40.42 and half core 31.3
Pour adhesive into the gap between 2 and join.

As the bonding agent, an epoxy-based synthetic resin adhesive or the like is used.

Next, half core 31.32 and half core 33.34
The magnetic head is completed by fixing the back core 35 to the upper end of the magnetic head with a bonding agent or a spring clip, and then polishing the sliding surfaces of the sliders 10 and 20.

The magnetic head of the present invention assembled in this way can move the head of a flexible 4-disk device in the same way as the conventional magnetic head. ! support arm (not shown).

In this way, according to this embodiment, manufacturing is easy and the slider 1
Since the bonding agent is reliably applied to the bonding surface between the 0.20 and the magnetic core assembly 30, the bonding is increased and a highly reliable magnetic head can be manufactured.

〔Effect of the invention〕

As is clear from the above explanation, the method for manufacturing a magnetic head for a flexible magnetic disk according to the present invention uses an adhesive made by mixing glass powder with an organic solvent and making a paste in order to fix the slider and the magnetic core assembly. is applied to the side surface of the slider in contact with the magnetic core assembly, dried, assembled and positioned, and then heated to melt the glass in the adhesive and bond the adhesive. , there is no variation in bonding strength, a magnetic head with high bonding strength and high reliability can be provided, and the manufacturing method is also easy.

[Brief explanation of the drawing]

1 to 4 show the structure of a magnetic head according to an embodiment of the present invention, FIG. 1(A) is a sectional view of the main part, FIG. 1(B) is an enlarged view of the main part showing the bonded state, 2 is a perspective view of a pair of sliders showing the configuration of the present invention, FIG. 3 is a side sectional view of the magnetic head of FIG. 1 (A), FIG. 4 is a plan view similarly seen from the top, and FIG. 8 shows the structure of a conventional magnetic head, FIG. 1(A) is a sectional view of the main part, FIG. 1(0) is an enlarged view of the main part showing the bonded state, FIG. 2 is a perspective view of the slider, FIGS. 3 and 1 are side cross sections of the magnetic head, and FIG. 4 is a top view of the magnetic head. 10.20...Slider, 12.22...Side wall, 12a, 22a...Glass layer, 30...Magnetic core assembly, 35...Back core. Funeral diagram Funeral diagram Funeral diagram 1 Figure

Claims (1)

[Claims] (1) Manufacture of a magnetic head for a flexible disk in which a magnetic core assembly in which a recording/reproducing magnetic core and an erasing magnetic core are integrally formed and a pair of sliders made of a non-magnetic material are bonded using adhesive. In the method, a step of mixing glass powder and an organic solvent and applying a paste-like adhesive to at least one joint surface of the magnetic core assembly and the slider, a step of drying the adhesive, a step of drying the adhesive, and a step of drying the adhesive, and a step of drying the adhesive;・The process of combining and fixing the assembly and the pair of core sliders, the combined magnetic core・
1. A method of manufacturing a magnetic head for a flexible disk, comprising a step of pressurizing and heating an assembly and a pair of core sliders to melt the glass powder in the adhesive and join them.