JPS5919945Y2 - magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a magnetic head, particularly an erase head with multiple working gaps, and its purpose is to facilitate assembly of the head.

A conventional multi-operation gap type erasing head, for example, as shown in FIG.
After inserting the cores, they were adhered to the central core 1 from both sides via U-shaped side cores 4 and gap spacers 6, respectively.

As is clear from the figure, such a conventional erasing magnetic head requires an extremely laborious process such as positioning the central core 1 and the side cores 4 and 5.

The present invention solves these conventional drawbacks and provides an erasing head that is extremely easy to assemble.

An example of the present invention will be described below with reference to FIG. 2 and subsequent figures.

In the present invention, as shown in FIG. 2, a plurality of working gaps g1 and g2 are formed on the front surface of the central core 11 and the cores 12 on both sides through the gap spacer 6.
13, a central core 16 that abuts each corresponding core 11, 12, and 13 of this front core portion, and cores 17 and 18 on both sides, forming an E-shape as a whole. A rear core portion 15 is provided integrally formed with.

The front core portion 14 and the rear core portion 15 may be made of, for example, ferrite.

34 is a portion that abuts against the case.

The cap fusion is performed using glass, resin, etc., for example.

One solution is to configure a coil bobbin 19 as shown in FIG.

That is, this coil bobbin 19 has a cylindrical part 22 having a central hole 21 into which the central cores 11 and 16 of the front core part 14 and the rear core part 15 are inserted, respectively, and has a cylindrical part 22 wound with a coil 20 on the outside. It has flange parts 23 and 24 integrally formed symmetrically with the flange part 2.
The cores 12 on opposite sides of the front core portion 14 and the rear core portion 15, respectively, in one opposing portion of each of the cores 3 and 24.
．． Notches 25 and 26 into which 17, 13, and 18 are fitted
form and compose.

Note that grooves 27 are formed in other opposing portions of the flange portions 23 and 24 that do not have the notches 25 and 26 to facilitate guiding of the lead wire of the coil 20.

The coil bobbin 19 is made of an elastic plastic such as polyethylene resin, and is formed symmetrically so that there is no need to consider the direction when inserting the core.

When assembling, after winding the coil 20 around the outer periphery of the cylindrical part 22 of this bobbin 19, the front core part 1
The center core 11 and both side cores 12 and 13 of 4 are inserted from one end so as to fit into the center hole 21 and the notches 25 and 26 on both sides, and the center of the rear core portion 15 is inserted from the other end. The core 16 and both side cores 17 and 18 are inserted so as to fit into the center hole 21 and the notches 25 and 26 of the bobbin, respectively, and the abutting portions of the corresponding cores of both core portions 14 and 15 are bonded with adhesive. Fixed via.

In this case, the front core part 14 and the rear core part 15 are connected to the center hole 21 of the bobbin 19 and the notches 25, 25 on both sides thereof.
Assembling is extremely easy.

The head element 28 assembled in this manner is attached to a terminal block 30 on which terminal pins 29 are planted, as shown in FIG.

In this case, a mask material 31 made of, for example, low magnetic permeability ferrite, glass, or ceramic is integrally attached to the front core portion 14 of the head element 28.

In this state, the tape sliding surface 32 is cylindrically polished.

Then, as shown in FIG. 5, the head element 28 is fitted into the case 33 to complete the process.

The case 33 has a tape attached to it as well as an operating gap g.
1. A tape guide piece 35 that can run in a predetermined relationship with gz is formed by integral molding of resin.

In this way, when the tape guide piece 35 is formed integrally with the case 33 itself, the number of parts is reduced and the number of steps for inserting the tape guide is reduced.

Moreover, since the dimensional accuracy between the tape guide piece 35 and the position of the erase track is automatically determined, the positional relationship can be made with extremely high precision, and the erasure rate of other channels can be reduced or the erasure rate can be improved.

As mentioned above, according to the present invention, the erase head can be easily assembled due to its extremely simple structure, which improves workability, reduces costs, and promotes mass production. be.

[Brief explanation of the drawing]

Fig. 1 is an exploded view showing an example of a conventional multiple working gap type magnetic head, Fig. 2 is a sectional view showing an example of the magnetic head of the present invention, Fig. 3 is a perspective view of the coil bobbin, and Fig. 4 is a FIG. 5 is a perspective view of a head element according to the present invention, and FIG. 5 is a perspective view showing a completed magnetic head according to the present invention. 14 is a front core portion, 15 is a rear core portion, 19 is a coil bobbin, and 20 is a coil.

Claims (1)

[Scope of utility model registration request] An E-shaped front core portion including a central core and both side cores integrated to form a plurality of working gaps at the front surface, and a central core and both side cores abutted against the respective cores of the front core portion. Flange portions are formed at both ends of the cylindrical portion into which the central cores of the front core portion and the rear core portion are inserted, and the cores on both sides of the front core portion and the rear core portion are inserted into the flange portions. A magnetic head having a coil bobbin provided with a notch to fit into the coil bobbin.