JPH08124129A - Magnetic head device - Google Patents

Abstract

PURPOSE: To shorten production lead time by executing adhering and fixing of a head part and parts, such as gimbals, by an instantaneous adhesive without using epoxy resins or UV curing resins. CONSTITUTION: This magnetic head device 10 is composed of the head part 13 formed of a head core 11 having a read/write gap part and a slider 12, the gimbals 14 adhered and fixed with the head part 13 by the adhesive 15 and a carriage adhered and fixed with the gimbals 14 by the adhesive 17. The read/write gap position of the head core 11 of the head part 13 is exactly positioned and adjusted to the gimbals 3 by utilizing an optical microscope, etc., or the external shape of the head part 13, and thereafter, the instantaneous adhesive 15 having a viscosity of >=1200cps is adhered to the joining boundary part of the slider 12 of the head part 13 and the gimbals 14 to instantaneously adhere these parts in the case of fixing the head part 13 and the gimbals 14. Next, the fixing of the gimbals 14 and the carriage 16 is similarly executed by using the instant set adhesive 17. The adhesion is executed by applying the adhesives to a thickness of >=0.05mm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device as a magnetic storage device such as a personal computer and a word processor, and more particularly to a magnetic head fixing structure of the magnetic disk device.

[0002]

2. Description of the Related Art Generally, as a magnetic head device in a floppy disk drive device as a magnetic storage device used in this kind of electronic equipment, various magnetic head devices having various structures and shapes according to the purpose and function are implemented. As a conventional example, a magnetic head device shown in FIG. 4 will be described.

As shown in the figure, in a conventional floppy disk drive device, as an example, the magnetic head device portion below the magnetic head device for recording / reproducing on both sides of the floppy disk is shown. Is
The carriage 2, the gimbal 3 fixed to the carriage 2 by the adhesive portion 7, and the adhesive portion 8 on the central portion of the gimbal 3.
And a head portion 4 formed of a slider 5 and a head core 6 that are fixedly supported together with the head portion 4.

Here, the bonding structure of the bonding portions 7 and 8 in the magnetic head device 1 will be described. First, when the head portion 4 and the gimbal 3 are fixed, the read / write gap position of the head portion 4 is set on the gimbal 3. Positioning adjustment is performed accurately by using an optical microscope or the outer shape of the head unit 4, and then temporary bonding is performed with an instant adhesive, and then permanent bonding is performed with an epoxy resin or a UV curable resin for adhesive fixing. .

Next, when the gimbal 3 with the head portion 4 accurately positioned is fixed to the carriage 2, similarly, the read / write gap position of the head portion 4 is accurately positioned and adjusted by an optical microscope or the like. The gimbal 3 is temporarily bonded to the carriage 2 with an instant adhesive, and then permanently bonded with an epoxy resin or a UV curing resin to be fixedly bonded.

[0006]

However, in the adhesive fixing structure of the conventional magnetic head device 1 configured as described above, the adhesive composition of the adhesive portions 7 and 8 makes the instantaneous adhesive for temporary adhesion have a viscosity. Is 500 cp or less, the viscosity is low and it penetrates between the adhesive members, making it difficult to apply the adhesive with a thickness of 0.05 mm or more.

For this reason, the peeling strength is weak, and since the fixing strength as the main adhesive cannot be sufficiently secured by the adhesive fixing with only the instant adhesive, it is necessary to perform the main adhesive with the epoxy resin or the UV curing resin. When this epoxy resin or UV-curing resin is used for the main adhesion, the peel strength after the humidity resistance test at 50 ° C, 95%, 48 hours, which is the humidity resistance test condition for the adhesive fixation of only the instant adhesive. The value of 300 gf is 900 gf and the peel strength is high.

[0008] This means that when the adhesive fixing is performed with the instant adhesive and the epoxy resin in order to enhance the peel strength, the epoxy resin 4 drying equipment for drying and curing the epoxy resin and the drying process are required for the adhesive fixing process. There was a problem.

Further, in the case where the main bonding is performed with the instant adhesive and the UV curable resin, there is a problem that UV irradiation equipment and the process for curing the UV curable resin are required in the bonding and fixing step.

The present invention has been invented in view of the above problems, and an object of the present invention is to provide a magnetic head in which the production lead time is shortened and the cost is reduced in the adhesive fixing process of the magnetic head device.

[0011]

Therefore, as a means for solving the above-mentioned problems, the present invention uses an instant adhesive having a viscosity of 1200 cp or more to bond and fix the head portion and the gimbal and / or the gimbal and the carriage portion. The magnetic head is characterized in that the adhesive is fixed to a thickness of 0.05 mm or more and applied.

[0012]

According to the above structure, in the magnetic head device according to the present invention, the adhesive strength and the processing time can be shortened in the step of adhesively fixing the head portion and the gimbal.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the magnetic head device according to the present invention, in which a magnetic head device is positioned on both sides of a floppy disk for recording and reproduction. FIG. 4 is a perspective view showing a lower magnetic head device portion, and FIGS. 2 and 3 are cross-sectional views of an embodiment of the adhesive fixing portion.

As shown in the figure, a magnetic head device 10 according to the present invention has a head portion 1 formed of a head core 11 having a read / write gap portion and a slider 12.
3, a gimbal 14 to which the head portion 13 is adhered and fixed with an adhesive 15, and a carriage 16 to which the gimbal 14 is adhered and fixed with an adhesive 17.

Here, the adhesive structure of the adhesives 15 and 17 in the magnetic head device 10 will be described.
In the case where the head portion 13 and the gimbal 14 are fixed to each other, the read / write gap position of the head core 11 of the head portion 13 of the gimbal 3 is accurately adjusted by using an optical microscope or the like, or the outer shape of the head portion 13 is adjusted. Then, the instantaneous adhesive 15 having a viscosity of 1200 cp or more is attached to the joint boundary portion between the slider 12 and the gimbal 14 of the head portion 13 to instantaneously adhere and fix.

Next, when the gimbal 14 to which the head portion 13 is accurately positioned and fixed is fixed to the carriage 16, similarly, the read / write gap position of the head portion 13 is accurately adjusted by an optical microscope or the like. Then, the instant adhesive 17 having a viscosity of 1200 cp or more is attached to the joint portion between the gimbal 14 and the carriage 16 to instantly fix the gimbal 14 to the carriage 16.

Further, in the case of the adhesive fixation according to the present invention, for example, when the gimbal 14 and the carriage 16 are fixed as shown in the sectional view taken along the line AA of FIG. 2, the instantaneous adhesive 17 is applied to the adhered portions of the gimbal 14 and the carriage 16. On the other hand, the adhesive has a thickness T of 0.05 mm or more and is adhered so as to cover the adhered portion.

Next, another embodiment relating to the adhesive fixing of the magnetic head in the present invention is shown in FIG. 3, and this will be described. In this embodiment, the gimbal 14 to which the head portion 13 is adhesively fixed is used as the adherend. The figure shows a case where the gimbal 14 is fixedly adhered to the carriage 16, and the instantaneous adhesive 17 having a viscosity of 1200 cp or more is first applied to a predetermined position of the carriage 16, and the gimbal 14 is accurately positioned and adjusted from above. The adhesive 17 is pressed and bonded and fixed in a pressed state, and the adhesive 17 protruding from the gimbal 14 is further stacked and fixed on the upper surface of the gimbal 14 so as to have a thickness T.

In the case of the adhesive fixation according to the present invention, the peel strength after the humidity resistance test under the humidity resistance test conditions of 50 ° C., 95% and 48 hours is 900 gf, which is high, and the conventional epoxy resin Alternatively, the adhesive fixing structure has a peel strength equivalent to that in the case where the main adhesion is performed by using a UV curable resin to perform the adhesive fixing.

[0020]

As described above, according to the magnetic head of the present invention, an epoxy resin or a U resin is used to bond and fix the head portion and the gimbal and / or the gimbal and the carriage portion.
Adhesive strength can be increased without using V-curing resin, and since epoxy resin is not used, the drying equipment and the drying process required for curing epoxy resin are not required, which shortens the curing time and reduces the production lead time. It can be shortened.

Further, when the UV curable resin is used, the UV irradiating device and its process required for curing the UV resin are not required, the adhesive strength is improved and the processing time is shortened, and the cost is reduced. It is possible to provide a magnetic head capable of performing the above.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a magnetic head device according to the present invention.

FIG. 2 is a sectional view taken along the line AA of the magnetic head device according to the present invention.

FIG. 3 is a sectional view showing another embodiment of the magnetic head device according to the present invention.

FIG. 4 is a perspective view showing an example of a conventional magnetic head device.

[Explanation of symbols]

 10 Magnetic Head Device 11 Head Core 12 Slider 13 Head Part 14 Gimbal 15,17 Instant Adhesive with Viscosity of 1200 cp or More 16 Carriage

Claims (1)

[Claims] 1. A head portion and a gimbal and / or a gimbal and a carriage portion are bonded and fixed with an instant adhesive having a viscosity of 1200 cp or more and an adhesive thickness of 0.05 mm or more. Characteristic magnetic head device.