JPH0441408B2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a magnetic head, and more specifically, the present invention relates to a magnetic head, and more specifically, core assembly halves in which the core halves are supported by core ports are butted together, fitted into a case, and resin is injected. This invention relates to a magnetic head that is integrally fixed.

Prior Art The structure of a conventional magnetic head of this type is shown in FIG.

In Fig. 1, what is indicated by numeral 1 is a case.
An opening 1a through which the magnetic head core faces is formed on the side of the magnetic recording medium sliding surface.

Reference numeral 2 indicates a core assembly, and this core assembly 2 is composed of a pair of left and right core assembly halves 3, 3. The core assembly half 3 consists of a core port 4 and core halves 5 and 6 supported by the core port 4, and a blocking plate 7 is inserted between the core halves 5 and 6.

A coil 8 is attached to the rear end sides of the core halves 5 and 6, and a terminal conductor 9 is provided integrally with the coil bobbin around which the coil 8 is wound.

The pair of left and right core assembly halves 3, 3 having such a structure are butted together, fitted into the case 1 in an integrated state, and fixed with resin.

By the way, since it is necessary to ground between the core halves 5 and 6 and the case 1, the core support 4 is usually made of a die-cast product, and a chevron-shaped notch 4a is formed on the top surface of the core support 4. A plate spring 7 having a cross section is fitted, and this plate spring 10
The core assembly 2 is fitted into the case 1 while being elastically deformed, and grounded via a leaf spring 10.

By the way, when the above structure is adopted, the core support 4 and the leaf spring 10 are present to ground the core and the case, and a plurality of contact points are present. The more contact points there are, the more likely contact failure will occur, and it is theoretically insufficient to provide complete grounding.

Further, the leaf spring 10 may be deformed due to contraction of the injected resin during curing, resulting in poor contact and failure to connect to the ground.

Purpose The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a magnetic head configured to ensure reliable grounding between the core and the case. It is said that

Embodiments Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings.

First Embodiment What is shown in FIGS. 2 and 3 explains the first embodiment of the present invention. In each figure, the same or corresponding parts as in FIG. 1 are given the same reference numerals. However, the explanation thereof will be omitted.

In this embodiment, an opening 4 is provided on the side surface of the core support 4 through which the core halves 5 and 6 and the shielding plate 7 are exposed.
b is formed.

On the other hand, the reference numeral 11 is a ground conductor, and a wide part 11a is formed on the tip side of the ground conductor so that the core halves 5 and 6 and the shielding plate 7 can come into contact with each other.From this wide part 11a, a bent part is formed. The ground conductor 11 extends rearward via the ground conductor 11b, and the rear end of the ground conductor has a folded part 11c folded back in an L-shape.
is formed. The amount of bending of the bent portion 11b is the same as the thickness of the core support 4.

The wide portion 11a of the ground conductor 11 is spot-welded to the core halves 5, 6 and the shielding plate 7 at a portion 11d for connection.

With such a terminal conductor 11 attached to one side of the core assembly half 3, it is butted against another core assembly half to which another ground conductor is not attached,
It is fitted into the case 1.

Then, the folded portion 11c of the ground conductor 11 is fitted between the side plates of the case 1 from the side edges of the case 1.

Then, a portion indicated by reference numeral 11e is fixed to the case 1 side by spot welding.

Since this embodiment is configured as described above,
Since the core halves 5 and 6, the shield plate 7, and the case 1 are directly connected by the ground conductor 11, reliable grounding can be achieved and there is no resistance to shrinkage when the resin hardens or changes over time. Not affected at all.

Second Embodiment FIG. 4 explains a second embodiment of the present invention. In this embodiment, a groove 4c is formed on the side surface of the core support 4, and a ground conductor 1 is inserted into the groove 4c.
A structure in which 1 is fitted is adopted.

If such a structure is adopted, the earth conductor 11
can be prevented from protruding from the side of the core support 4.

If such a structure is adopted, the same effects as those of the above-mentioned embodiments can be obtained, and the assembly becomes easier.

Third Embodiment FIG. 5 is a diagram for explaining a third embodiment of the present invention. - 14 are provided, the core halves 5 and 6 are fitted with the upper and lower fitting parts 12 and 14, and the blocking plate 7 is held between the narrow fitting part 13 located in the center. We are hiring.

The core halves and the shielding plates are sandwiched between the fitting parts 12 to 14 and fixed by spot welding.

If such a structure is adopted, it becomes possible to connect the core halves and the shield plate more reliably, and the ground conductor 11 can be considered as a part of the core support, thereby supporting the core half. Accuracy can be increased.

Even if such a structure is adopted, more reliable grounding can be achieved.

Effects As is clear from the above description, according to the present invention, an opening is provided in a part of the core support, the core half and the shield plate are exposed to this opening, and one end of the ground conductor is connected to the core in this opening. The structure is fixed to the half body and the shield plate, and the other end of the ground conductor is fixed to the case side, so it is possible to securely connect the ground, and synthetic resin molded products can be used through the core support. , significant cost reductions can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view illustrating a conventional structure, FIGS. 2 and 3 are perspective views of a core assembly half and a completed magnetic head, illustrating a first embodiment of the present invention. FIG. 4 is an exploded perspective view of a core support section illustrating a second embodiment of the invention, and FIG. 5 is a perspective view of a core assembly half illustrating a third embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Case, 2... Core assembly, 3... Core assembly half, 4... Core support, 5, 6... Core half, 7... Breaking plate, 11... Earth conductor, 11
c...Folding section.

Claims (1)

[Claims] 1. An opening through which the core half and the shielding plate are exposed is provided in a part of the core support, one end of the earth conductor is fixed to the core half and the shielding plate within this opening, and the earth conductor is fixed to the core half and the shielding plate. A magnetic head characterized by having the other end fixed to the case side. 2. The magnetic head according to claim 1, wherein a folded portion is formed at the end of the ground conductor opposite to the core to hold the edge of the case.