JPH056564Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic head, and particularly to a magnetic head for VTR audio/control.

[Conventional technology]

A magnetic head is constructed by storing the magnetic head components, which consist of multiple magnetic cores, coils, and many other small parts, in a predetermined position inside a hold case, and then inserting this hold case into a shield case. .

FIG. 3 shows the structure of such a conventional magnetic head. FIG. 3a shows the shield case 12, and FIG. 3b shows the shield case 12.
1 shows the hold case 1 inserted into the interior.
A large number of magnetic head components as described above are housed in predetermined positions in the hold case 1. In the figure, the magnetic cores 2 and 3, each consisting of a pair of cores, make sliding contact with the magnetic tape. The terminal 5 protrudes from the front side of the configuration, and the terminal 5 protrudes from the opposite back side.
is prominently shown. Hold case 1 is
As shown in the figure, the holding case is divided into two halves, ie, two hold case halves 1a and 1b, in order to facilitate the placement of the magnetic head components at predetermined positions inside.

The hold case 1 thus divided into two halves 1a and 1b is fixed integrally by pressing springs 10 hung on both ends thereof. As shown in the figure, this pressing spring 10 is a U-shaped spring, and both ends thereof bent at right angles are hung on the hold case, so that the divided hold cases are integrated with each other. Fixed. In addition, shield case 12
A rectangular recess 12c is formed on one side that constitutes a sliding surface with the magnetic tape, and this recess 12c
A pair of openings 12b through which the magnetic cores 2 and 3 pass are formed on both sides. And Figure 3b
When a hold case assembly 1', which is constructed by storing a large number of magnetic head components in a hold case 1 and fixed by a pressing spring 10 as shown in FIG. 3A, is inserted into the shield case 12 of FIG. The magnetic cores 2 and 3 are exposed through the opening 12b. In this way, the hold case assembly 1' is inserted into the shield case 1, and both are bonded and fixed.

[Problems to be solved by the invention] In the conventional magnetic head described above, in order to integrally fix the hold case 1 divided into two halves 1a and 1b, a presser foot with both ends bent at right angles is required. Using a spring 10, both bent ends are hung on both ends of the divided hold case 1 and fixed. In this case, since the presser spring 10 is formed in a U-shape bent at right angles, when both ends are hung on the end of the hold case 1, the presser spring 10 comes into contact with the entire side surface of the hold case 1. Therefore, the spring force does not act on the hold case 1, and the force that fixes the hold case 1 integrally is weakened.
There is a problem that the hold case 1 cannot be completely fixed.

Furthermore, the gap between the magnetic cores 2 and 3, which are sandwiched from both sides by the hold case 1 and fixed even more firmly, becomes poorly joined.
There is also the problem that magnetic properties deteriorate.

The purpose of this invention is to solve the above conventional problems,
The object of the present invention is to provide a magnetic head in which a hold case is more firmly fixed and reliability and magnetic properties are improved.

[Means for solving problems]

In order to solve the above-mentioned problems, the magnetic head of the present invention fixes the divided hold case with the press spring to house the magnetic head components, and the hold case has a bulged surface on the contact part with the press spring. At the same time, curved portions are formed at both ends of the press spring that hang on the hold case.

[Effect]

In the magnetic head of the present invention, after the magnetic head components are housed in the divided hold case, the hold case is fixed by extending the curved ends of the pressing spring between the bulging surfaces of the hold case.

〔Example〕

The present invention will be described below with reference to the drawings.

1a and 1b show a magnetic head according to an embodiment of the present invention, FIG. 1a shows a shield case 24 of the magnetic head, and FIG. A hold case assembly 21' containing magnetic head components is shown. Then, the hold case assembly 21' assembled as shown in FIG. 1b is attached to the shield case 24.
A magnetic head is constructed by inserting the magnetic head into the magnetic head and fixing it with an adhesive or the like.

The hold case assembly 21' houses a large number of magnetic head components in the hold case 21, and in the figure, magnetic cores 2 and 3, each consisting of a pair of cores, constitute a sliding surface with the magnetic tape. Terminals 5 are shown protruding from the front side and from the back side.

The hold case 21 is formed by being divided into two hold case halves 21a and 21b in order to easily accommodate a large number of magnetic head components. After storing the magnetic head components in each of these halves 21a and 21b, the divided hold cases 21 are put together as shown in FIG. 1b, and the combined pair of hold cases 21 is pressed. It is fixed at 23. Therefore, at the front corner of each of the hold case halves 21a, 21b, there is a bulging surface 2 whose inner surface bulges laterally in an arc shape.
Concave portions 21c and 21d formed in 1e and 21f are bored, and curved portions 23a and 23b at both ends of the pressing spring 23 are hung on the tops of the bulging surfaces 21e and 21f.

The pressing spring 23 is formed with both ends curved as shown in an enlarged view in FIG.
b are hung in the recesses 21c and 21d of the hold case 21, thereby integrally fixing the divided hold case 21. More specifically, the pressing spring 23 is formed so that both ends hung on the hold case 21 are curved to form curved parts 23a and 23b.
When a and 23b are hung on the hold case 21,
The pressing spring 23 is attached to the hold case 21 as in the conventional case.
As shown in FIG. 2, the spring force of the presser spring 23 is applied to the curved portion 2 without making full contact with the side surface of the hold case 21, as shown in FIG.
The bulging surfaces 21e, 2 are concentrated at the ends of 3a, 23b.
Since it acts on the vertex of 1f, hold case 21
In other words, the spring force of the pressing spring 23 is not destroyed by full-surface contact and acts sufficiently and completely to firmly fix the hold case 21 as one unit.

Further, as shown in FIG. 1a, the shield case 24 has a rectangular recess 24c formed on one surface that forms a sliding surface with the magnetic tape.
A pair of openings 24b through which the magnetic cores 2 and 3 pass are formed on both sides of the opening 24c.

In the case formed as described above, each of the divided halves 21a, 21 of the hold case 21
After storing the magnetic head components in the holding case 21, the magnetic head components are placed together as shown in FIG.
The curved portions 23a and 23b at both ends of the presser spring 23 are applied to the bulging surfaces 21e and 21f of the holding case 21, and the divided hold case 21 is integrally and firmly fixed to form a hold case assembly 21'. After inserting the solid body 21' into the shield case 24, the two are fixed by adhesive or the like to form a magnetic head. In addition, hold case assembly 2
1' into the shield case 24, the magnetic cores 2 and 3 are exposed from the opening 24b.

[Effect of idea]

As explained above, according to the present invention, the divided hold cases are integrally fixed by extending the curved portions at both ends of the press spring between the bulging surfaces of the hold case. The spring force of the pressing spring contacts the side of the case at one point and acts sufficiently efficiently to draw the divided hold cases together and fix them together, so the divided hold cases are held together by the pressing spring. As a result of being integrally and firmly fixed and preventing the gap from opening, deterioration of magnetic properties is prevented and reliability is improved.

[Brief explanation of the drawing]

1A and 1B are perspective views showing a shield case and a hold case assembly of a magnetic head according to an embodiment of the present invention, FIG. 2 is an enlarged view of the main parts of the magnetic head shown in FIG. 1, and FIG. Figures a and b are perspective views showing a conventional shield case and hold case assembly, respectively, of a magnetic head. In the figure, 21... hold case, 21'
...Hold case assembly, 21a, 21b...
Hold case halves, 21e, 21f... bulging surfaces, 23... pressing springs, 23a, 23b... curved parts.

Claims (1)

[Claims for Utility Model Registration] Consisting of a magnetic head component that is housed in a predetermined position in a divided hold case, and then a pressing spring is applied between the divided hold cases to fix the hold cases together. What is claimed is: 1. A magnetic head, characterized in that a bulging surface is provided at a contact portion of the hold case with the press spring, and curved portions are formed at both ends of the press spring that hang on the hold case.