JPH03212809A - Magnetic head for floppy disk - Google Patents

Abstract

PURPOSE:To assure the flatness of a slider front surface after fixing of a front core by limiting the coating region of a resin material for fixing the front core in the slider. CONSTITUTION:The front core part 3 joined with an L-shaped side core 5 and an I-shaped center core 4 is inserted into a front face window hole 2 of the slider 1 and only the part from the position near the curved part of the L-shaped side core 5 to the front part of the slider 1 is fixed by a resin adhesive material. Namely, the rear part side from the part near the curved part of the L-shaped side core 5 is so formed as not to be interposed with the resin adhesive material. The generation of the deformation of the head sliding surface by the influence of the heat and moisture in the later stages or during the reliability test after completion or the use after the assembly to equipment is, therefore, obviated. The magnetic having the high reliability is obtd. in this way.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a magnetic head for a floppy disk, in particular, a front core portion consisting of a pair of L-shaped side cores and an I-shaped center core is inserted into a front window portion of a slider, and a resin This relates to a floppy head whose two parts are fixed with adhesive.

(Prior Art) Conventionally, this type of floppy head has been constructed by sandwiching or fitting the front core part of the head core assembly into a case-like slider, and applying a resin material to the inside of the slider to fix the front core part to the slider. was.

FIG. 3 is a front sectional view of a conventional floppy head, and FIG. 4 is a side sectional view of FIG. 3. The slider 1 has a box-like shape with an open rear part, and a window hole 2 is bored in the front surface (on the side facing the magnetic medium) through which the front part of the front core part 3 is exposed. The front core part 3 is inserted from the rear. In the front core part 3, abbreviated side cores 5 are fixed to both sides of an I-shaped sex core 4 so that a magnetic gap 10, 11 is formed between them.
After inserting it into the slider 1 in this state,
As shown in the figure, the front core portion 3 is adhered and fixed to the slider 1 by applying a resin material 6 to the inside of the slider.

FIG. 5 is a partial perspective view of the inside of the slider taken along line FF in FIG. 3. FIG. A rising protrusion (nose) 16 for positioning the side of the ■-shaped center core 4 of the front core section 3 is formed in the core accommodation space 13 of the slider 1 adjacent to the core insertion window hole 2. . When fixing the core part 3, a core fixing resin material 6 is applied to the wall of the window hole 2 facing the side surface of the core part 3 and the entire wall surface of the rising convex part 16 to bond the core part 3 and the slider 1 together. will be done.

(Problems to be Solved by the Invention) As mentioned above, in this type of front core, the front core section is inserted into the slider and fixed with resin, and then the front surface of the slider is polished. As explained in the figure, in the past, a rising protrusion 16 was formed inside the slider for positioning the I-shaped center core of the front core part, and the core was fixed in the gap between the rising protrusion 16 and the ■-shaped center core 4. It is fixed by pouring a resin material into it. This rising convex portion 1
Due to the fixation of the resin material 6 at the part 6, the front core part 3 becomes a bent center core due to thermal expansion due to the influence of heat and humidity in the subsequent process, or during a reliability test after completion, as shown in Fig. 6. 4 is pulled toward the rear side from the resin bonded part of the front core part 3, and different movements such as expansion and contraction of the head due to the resin bonded around the front core part 3 are caused at the bonded part of the ■-shaped center core, and the sliding surface is There was a problem in that the center of the front core portion (near the ■-shaped center core) became concave, resulting in deterioration of electrical characteristics.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head for a floppy disk having a structure in which the flatness of the front surface of the slider after the front core is fixed is ensured by limiting the application area of the resin material for fixing the front core inside the slider.

(Means for Solving the Problems) In the magnetic head according to the present invention, a front core portion in which an L-shaped side core and an L-shaped center core are joined is inserted into a front window hole of a slider, and the Only the front portion of the slider is fixed with a resin adhesive, and no resin adhesive is interposed on the rear side near the bent portion of the side core.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a floppy head according to an embodiment of the present invention, and FIG. 2 is a side view of a front core portion according to the present invention. The front core section 3 is constructed by sandwiching both sides of the front end of an I-shaped center core 4 between a pair of L-shaped side cores 5.
In this state, the slider is inserted into the front window hole 2 of the slider 1 from the rear side, and the space between the front core part 3 and the slider interior 13 is fixed with a resin material. Here, in the conventional case, this resin material is bonded to the middle to near the rear end of the ■-shaped center core of the front core part, whereas in the present invention, the resin material is bonded only to the area near the front part of the front core part 3. Glued. Specifically, as shown in FIG. 2, an adhesive resin material 4 is bonded from the vicinity of the L-shaped bent portion 12 of the L-shaped side core 5 to the core exposure window hole 2 of the front surface 1a of the slider 1, and the adhesive resin material 4 is bonded to the side core bent portion. There is no resin material for fixing the front core in the area from the vicinity to the rear end, that is, in the range A in FIG. 2. In other words, there is no resin material for fixing the front core in the area A shown in FIG. There is almost no resin material 14 for fixing the core in 16a, so that even if the head naturally expands and contracts due to heat and humidity after the core is assembled, the center of the front surface of the core remains a raised convex portion. 16 side, a flat sliding surface is ensured, and a highly reliable magnetic head is obtained.

(Effects of the Invention) As explained above, according to the present invention, the range of the resin material that fixes the front core part to the slider is limited to the front side from the bent part of the L-shaped side core. This has the advantage that a highly reliable magnetic head can be obtained without deformation of the head sliding surface due to the effects of heat and humidity, or during reliability tests after completion or during use after installation in the device.

[Brief explanation of drawings]

FIG. 1 is a front view of a floppy head according to an embodiment of the present invention, FIG. 2 is a side view of a front core portion of a floppy head according to an embodiment of the present invention, and FIG. 3 is a front sectional view of a conventional floppy head. Figure 4 is a side sectional view of Figure 3, and Figure 5 is a side sectional view of Figure 3.
These figures are a perspective view of the inside of the slider as seen from the arrow FF in FIG. 3, and FIG. 6 is a partial front sectional view showing a deformed state of the slider sliding surface of a conventional floppy head. l...Slider, 2...Window hole, 3...Front core part, 4...Curved center core, 5...
・・L-shaped ID core, 6.14・Resin material, 12・・
- Bent part, 16... rising convex part.

Claims (1)

[Claims] A front core part in which an L-shaped side core and an I-shaped center core are joined is inserted into the front window hole of the slider, and only a portion from a position near the bent part of the L-shaped side core to the front part of the slider is fixed with a resin adhesive, A magnetic head for a floppy disk, characterized in that no resin adhesive is interposed on the rear side near the bent portion of the L-shaped side core.