JPH04355205A - magnetic head device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head used for erasing signals recorded on a magnetic medium, and relates to a magnetic head device having an improved structure.

0002

2. Description of the Related Art FIG. 4 is an exploded perspective view showing the structure of a conventional magnetic head, and FIG. 5 is a sectional view thereof. As shown in FIG. 4, in a conventional magnetic head, a bobbin 3 with a predetermined winding is inserted into a back core 2, and a holder 4 made of resin, for example, is fixed to the magnetic head body that forms a closed magnetic path with the front core 1. In order to do this, a resin or the like is applied to the part 5 of the receiving stage that holds the back core 2 inside the resin holder 4, and the magnetic head body is inserted into the fitting part of the resin holder 4 and fixed. It was a structure.

0003

[Problems to be Solved by the Invention] However, in the conventional method, the magnetic head main body is inserted after applying adhesive to a resin holder, which causes the magnetic head main body to tilt due to foreign matter getting caught, and the adhesive to deteriorate. There were problems such as the need for pot life management after application, and the adhesive not being fully spread between the resin holder and the magnetic head body, resulting in a gap.

An object of the present invention is to provide a magnetic head device that solves the above problems.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention is provided with an adhesive inlet for fixing the magnetic head in a holder portion that holds the magnetic head portion, and the magnetic head portion is removed from the holder portion. The inlet is sloped in a direction that prevents it from escaping. Also, in order to ensure perfect adhesion, there is one or more pairs of injection ports.

[0006]

[Operation] As described above, the present invention has a structure in which an injection port is provided for injecting adhesive, and the magnetic head main body is inserted into the resin holder with a slight press fit, and the injection port provided in the resin holder is inserted into the magnetic head body. Inject more resin etc. and fix it.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic head according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of, for example, a resin holder that constitutes a magnetic head, and FIG. 2 is a perspective view of a resin holder shown in FIG. FIG. 3 is an external perspective view of a magnetic head into which a magnetic head main body forming a closed magnetic path with the front core 1 is inserted, and FIG. 3 is a cross-sectional view taken along line AA' in FIG. In these figures, 1 is a front core, 2 is a back core, 3 is a hobbin with a predetermined winding, and 4 is a resin holder, which is provided by penetrating the adhesive injection port 6 in an oblique direction. .

First, the resin holder 4 in this embodiment
will be explained with reference to FIGS. 1 to 3.

The structure of the resin holder 4 is that, as shown in the figure, adhesive injection ports 6 are provided in pairs on each side in the longitudinal direction.
is provided. The dimensions of the injection port 6 are large enough to allow adhesive to be injected from the outside, and the injection port 6 is located on the inner surface of the resin holder 4 and near the receiving stage portion 5 that holds the back core 2 of the magnetic head. By slanting the tip, the adhesive to be injected can easily penetrate from the bottom surface of the magnetic head, thereby fixing the core and holder. Furthermore, since the injection port 6 is hole-shaped and is formed diagonally in a direction to prevent the magnetic head from slipping out from the side surface of the resin holder 4, the adhesive will fix the magnetic head core and the resin holder 4. At the same time, it also acts as a stopper.

A magnetic head equipped with such an adhesive injection port 6 can be assembled as follows.

That is, the hobbin 3 with a predetermined winding is inserted into the back core 2, and the magnetic head body forming a closed magnetic path with the front core 1 is held on the inner surface of the resin holder 4, and the back core 2 is held. The assembly shown in FIG. 2 is produced with the correct mechanical dimensions by inserting the receiving stage up to part 5 with a slight press fit.

Next, the adhesive is injected and cured through the injection port 6 of the resin holder 4 set in a fitting (not shown), but the magnetic head body has already been inserted with some pressure and the assembly work has begun. Since the curing process is finished, curing work can be started immediately after injection of adhesive, etc., which reduces work time and eliminates the need for adhesive pot life management, contributing to stable quality.

Furthermore, after the magnetic head body is inserted and assembled by a slight press fit, adhesive is injected into the injection hole in the side wall provided at an angle with respect to the resin holder and hardened, so that the magnetic head body does not come off. It can be prevented.

Furthermore, since the adhesive is injected into the injection port, the holes are eventually filled and no voids are created.

As described above, according to the magnetic head of the embodiment of the present invention, since the magnetic head main body is bonded after confirming that it is correctly inserted into the resin holder having the inclined adhesive injection port, it is possible to reduce the size of the magnetic head. Accuracy can be achieved, working time can be shortened, and the magnetic head body can be prevented from coming off.

[0016]Although this embodiment has been described with respect to one pair of injection ports, it goes without saying that an even greater adhesion effect can be obtained by increasing the number of injection ports to a plurality of ports. Furthermore, the injection port is not limited to the side surface of the holder.

[0017]

[Effects of the Invention] Since the magnetic head of the present invention has the structure as described above, it is effective in preventing foreign objects from getting caught between the resin holder and the magnetic head body, and even if there are foreign objects, etc. Since no adhesive is injected, it can be easily removed, and the magnetic head body can be assembled by press-fitting it into the resin holder, and curing can be started immediately after the adhesive is injected. In addition to eliminating the need for life management, the ease of assembly contributes to a reduction in man-hours, and since the adhesive is injected and hardened into the injection port on the side wall that is inclined to the resin holder, it is easy to assemble the magnetic head body. It is possible to provide a magnetic head device that has many effects such as being able to prevent slippage.

[Brief explanation of drawings]

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

FIG. 2 is a perspective view of a magnetic head device when a magnetic head main body is inserted into a resin holder according to an embodiment of the present invention.

[Figure 3]
A sectional view of a magnetic head device according to an embodiment of the present invention

[Fig. 4] Exploded perspective view of a conventional magnetic head device

[Figure 5] Cross-sectional view of a conventional magnetic head device

[Explanation of symbols]

1 Front core 2 Back core 4 Holder 6 Inlet

Claims (3)

[Claims] 1. A magnetic head device comprising a magnetic head section and a holder section for inserting and holding the magnetic head section, the holder section being provided with an adhesive inlet for fixing the magnetic head section. . 2. The magnetic head device according to claim 1, wherein the adhesive injection port has an inclination in a direction that prevents the magnetic head portion from coming out of the holder portion. 3. The magnetic head device according to claim 1, wherein there is one or more pairs of adhesive injection ports.