JPS63317918A - Magnetic head assembly - Google Patents

Abstract

PURPOSE:To grind the depth of a gap with high-precision and to improve the yield of working by joining and combining a core assembly and a holder constituting a slider after subject them to final working independently of each other. CONSTITUTION:An upper head assembly 1 and a lower head assembly 2 which are provided on both faces of a disk-shaped recording medium 5 and constitute a magnetic head assembly consist of a core assembly 3 and a holder 4 respectively. In case of assembling, the core assembly 3 and the holder 4 are combined into the head assembly after respective slide faces are subjected to final working such as grinding and polishing. Since grinding or polishing is not performed after assembling, working is performed with high precision. Thus, the depth of magnetic gap is ground and managed with high-precision and th yield of working is improved to improve the productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head assembly for recording and reproducing data on and from a flexible disc recording medium.

[Conventional technology]

2. Description of the Related Art Conventionally, a double-sided flexible disk storage device that can record on both sides of a flexible disk recording medium has been known as a digital recording device.

FIG. 4 is a perspective view showing the structure of a head assembly used in a conventional double-sided flexible disk storage device. In the configuration of the head assembly shown in FIG.
1 is attached to a slider holding spring 22, and a core assembly 23 is incorporated in the slider assembly 2. 24 is a flexible cable for connecting the head coil to an external electric circuit.

FIG. 5 is a side sectional view showing the head assembly of FIG. 4 in a recording/reproducing state facing a recording medium. In the figure, 25 is an upper head assembly, and 26 is a lower head assembly, each of which has a core assembly 23, which forms the main part of recording and reproducing, arranged in a position to avoid vertical magnetic interference. . Each core assembly 23 sandwiches a recording medium 27,
Data is recorded and reproduced by pressurizing and contacting both sides of the recording medium 27.

6 is an exploded perspective view showing the structure of the slider assembly portion of the head assembly of FIG. 4. FIG.

In the figure, 23 is a core assembly made of ferrite,
It is composed of a recording/reproducing core 28 and an erasing core 29, each of which is provided with a recording/reproducing gap of 30 degrees and an erasing gap 31. Ceramic holders 32a and 32b, which are components of the slider assembly 21, are disposed on both sides of the recording/reproducing core 28 and the erasing core 29, and are bonded to each other.

FIG. 7 is a perspective view showing the structure of the slider assembly shown in FIG. 6 after assembly and processing. After the holders 32a and 32b, which are the components of the slider assembly 21, are joined as described above, the medium sliding surface 33 of the slider assembly 21 is ground and polished into a flat surface. In addition, the slider assembly 21
A corner blend portion 34 with a naturally curved surface is provided around the periphery of the recording medium 27 so as not to damage the recording medium 27 when sliding thereon.

[Problem that the invention seeks to solve]

In the configuration of the conventional head assembly as described above, during the manufacturing process, each holder, which is a component of the core assembly 23 and the slider assembly 21, which are directly involved in recording and reproduction, is removed as shown in FIG. 32a.

32b and the recording medium 2 at the same time after assembling the recording medium 2.
In order to grind and polish the sliding surface with 7, the recording/reproducing gap 30. which affects the recording/reproducing performance in particular. The amount of grinding in the depth direction of the erasing gap 31 is the same as that of each holder 32a,
32b is machined with the inherent surface misalignment, it is not possible to grind with high precision, which causes performance to vary and become unstable.Furthermore, when the curved surface processing of the corner blend part 34 was sold out, the degree of processing was reduced. There was a problem in that productivity was extremely poor, such as the high core assembly 23 also becoming defective.

This invention was made to solve these problems, and it is possible to easily control the depth of the gap of the core assembly with high precision, and to improve the processing yield during production of the core assembly and holder. The purpose of this invention is to obtain a magnetic head assembly that can be used.

[Means for solving problems]

In the magnetic head assembly according to the present invention, before the core assembly and the holder, which constitute a slider that pressurizes and slides a recording medium from both sides, are bonded and processed to each other, a final coating is applied to each sliding surface separately. It is constructed by combining both a core assembly and a holder which have been processed.

[Effect]

In the magnetic head assembly of the present invention, before the core assembly and holder constituting the slider that pressurize and slide the recording medium from both sides are joined together and processed, each sliding surface is separately coated with a final coating. By combining the processed core assembly and holder, the gap depth of the core assembly can be easily controlled, and the processing yield during production of the core assembly and holder can be improved. can be improved.゛ [Embodiment] Fig. 1 shows a magnetic head assembly which is an embodiment of the present invention, in which the head assembly faces a recording medium and performs recording/recording.
FIG. 3 is a side sectional view showing a state of reproduction. In the structure of the head assembly shown in FIG. 1, an upper head assembly 1 and a lower head assembly 2 are disposed facing each other with a recording medium 5 in between. and each upper head assembly 1
and the lower head assembly 2 are equipped with a core assembly 3 for recording and reproducing, and as shown in FIG. There is.

FIG. 2 is a perspective view showing the detailed structure of the core assembly in the head assembly of FIG. 1. As shown in the figure, a recording/reproducing core 6 made of ferrite is provided with a recording/reproducing gap 7, and a recording/reproducing coil 8 is attached thereto. On the other hand, the erase core 9 is provided with a pair of erase gaps 10,
An erasing coil 11 is attached. 12 is a joint core, and this joint core 12 is connected to each recording/reproducing coil 8.
After the erasing coil 11 is installed, the magnetic circuit is closed to form a closed magnetic path, thereby forming the core assembly 3 as a whole.

Here, a corner blend portion 13 having a smooth curved surface is provided at a corner portion of the medium sliding surface of the core assembly 3.

In the head assembly having the above-mentioned configuration, the core assembly 3 and the holder 4, which are component parts constituting the slider that presses and slides the recording medium 5 from both sides, have separate sliding surfaces on each n sliding surface. After the core assembly 3 is subjected to final processing such as grinding and polishing, the core assembly 3 and the holder 4 which have been subjected to these processing are combined to form a structure. Therefore, like the conventional head assembly described above, the core assembly 23 and each holder 32a, 32b, which is a component of the slider assembly 21, are joined together.

Unlike the case where the sliding surface with the recording medium 27 is ground and polished at the same time after assembly, the core assembly 3 and the holder 4, which are each component of the slider, are
It is no longer necessary to perform grinding or polishing on the sliding surface with the recording medium 5, and for this reason, the core assembly 3 can be machined individually with high precision, and the holder 4 can also be machined with high precision. Since it can be processed well, the yield due to processing errors is limited to each component, so it is possible to improve the overall processing yield.

FIG. 3 is a partial side sectional view showing a magnetic head assembly according to another embodiment of the present invention, in which the head assembly faces a recording medium and is in a recording/reproducing state. In the figure, 3 is a core assembly, 5 is a recording medium, 14 is a holder, and 15 is a sliding surface recess that forms a sliding surface with the recording medium 5 provided on the holder 14. The embodiment shown in FIG. In this head assembly, the physical relationship between the core assembly 3 facing both sides of the recording medium 5 and the holder 14 on the receiving side is such that the core assembly 3 is slightly convex with respect to the reference surface of the recording medium 5. By making the holder 14 side concave, the adhesion characteristics of the core assembly 3 when sliding against the recording medium 5 are improved.

〔Effect of the invention〕

As explained above, in a magnetic head assembly, before the core assembly and the holder, which constitute the slider which pressurizes and slides the recording medium from both sides, are joined together and processed, the respective sliding surfaces are Final processing is done separately,
Since the core assembly and holder are constructed by combining these processed core assemblies, the gap depth of the core assembly can be easily controlled with high precision, and the processing yield during the production of core assemblies and holders is improved. This has the excellent effect of providing a head assembly that is highly productive and inexpensive.

[Brief explanation of the drawing]

FIG. 1 shows a magnetic head assembly according to an embodiment of the present invention, in which the head assembly faces a recording medium for recording and recording.
2 is a side sectional view showing the head assembly in the reproduction state; FIG. 2 is a perspective view showing the detailed structure of the core assembly in the head assembly of FIG. 1; and FIG. A partial side cross-sectional view showing the head assembly in a recording/reproducing state facing a recording medium;
FIG. 4 is a perspective view showing the configuration of a head assembly used in a conventional double-sided flexible disk storage device, and FIG. 5 shows the head assembly shown in FIG. 4 facing a recording medium in a recording/reproducing state. 6 is an exploded perspective view showing the configuration of the slider assembly portion of the head assembly of FIG. 4, and FIG. 7 is a side sectional view showing the structure of the slider assembly portion of FIG. 6 after assembly and processing. FIG. In the figure, 1, 25...upper head assembly, 2゜2
6... Lower head assembly, 3, 23... Core assembly, 4, 14, 32 a, 32 b... Holder, 5, 27... Recording medium, 6, 28... Recording・
Reproduction core, 7, 30...recording/reproduction gap, 8...
・Recording/reproducing coil, 9.29... Erasing core, 10.
31... Erasing gap, 11... Erasing coil, 12
...M joint-ry, 13.34... Corner blend portion, 15... Sliding surface recess, 21... Slider assembly,
22...Slider holding spring, 24...Flexible cable, 33...Medium sliding surface. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. 24: 7-layer full cable No. 5 Figure 23 Sub-23: Core assembly book 25, engineering 1 dan° Core combination rice, 28; Blind/reproducing core 29: Filling core 30' Recording/reproducing gap 31: Seiroku A゛ Yap 32q° E) Leg 32b: Holder

Claims (2)

[Claims] (1) In a magnetic head assembly for recording and reproducing information on both sides of a flexible disc recording medium, the sliding movement of the core assembly and holder forming a slider that presses and slides the recording medium from both sides A magnetic head assembly characterized in that the final processing is performed separately on the moving surface, and the core assembly and holder are combined together. (2) The core assembly has a convex surface with respect to the reference surface of the recording medium, and the portion of the holder on the receiving side facing the convex surface has a concave surface. magnetic head assembly.