JPH021689Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention relates to erasing heads such as V/T/R.
This invention relates to a magnetic head that is capable of erasing the entire width of the tape running surface, has a high-performance structure, and is intended to be miniaturized.

<Prior art> Conventionally, this type of erasing head is
As shown in the figure, a coil 11 is balancedly wound around a coil bobbin 10 that constitutes a head part, and a center core 13 is wound around a front core 12, 12.
The core portion, which has been assembled to form predetermined gaps 14a and 14b, is assembled together with the back core 15 into the holder 16, and after back molding, etc., the tape running surface is polished and molded.

However, the conventional erasing head described above has disadvantages such as a complicated structure and a large number of assembly steps, and the magnetic head itself is large.
Even when used in small V/TR, etc., there was a drawback that the overall size became large.

Therefore, in order to reduce the number of steps required for assembling the magnetic head and to make it smaller and more compact, as shown in FIG. The coil portion 20 has gaps 25a, 25a, 24, 25a, 24b, 24a, 24a, 24b, 24a, 24b,
5b is fixed and assembled together with the back core 26, and both ends of the coil 21 are resin-molded in the lead terminal parts 20a, 20b of the coil part 20, and the coil part Reference numeral 20 is integrally molded with a base portion 22 made of resin molding material.

However, the above-mentioned conventional example also has drawbacks such as the number of man-hours involved in winding the coil 21.

<Means for solving the problem> The present invention was made in view of the above-mentioned circumstances, and includes integrally molding a base that supports the coil part and core part that constitute the head part, and The purpose is to provide a compact and high-performance magnetic head by assembling a front core, center core, back core, etc.

<Example> Examples according to the present invention are shown in Figures 4 to 6 below.
This will be explained in detail based on the figures. 4a and 4b are a perspective view of a coil constituting a magnetic head according to the present invention and an exploded perspective view of the head part, and the coil part 1 around which a predetermined coil 2 is wound is a resin-molded mounting base. It is molded integrally with 3.

The above-mentioned coil part 1 is made by winding a hard copper wire with a relatively thick wire diameter into a coil shape in a mold for forming a core in advance, and connecting extension parts at both ends to lead terminals 4.
4 and is molded with resin.

Further, a coil portion in which gaps 7a, 7b are formed by the center core 5 and front cores 6, 6, and a back core 8 are fixed to the coil portion 1, and assembled as shown in FIG. 5.

The platform 3 is formed with a protrusion 3a on which the front cores 6, 6 that support the coil section 1 from the side and the back core 8 that magnetically form a closed circuit are assembled and fixed. In addition, on the platform 3,
A boss portion 3b for attachment to a device or the like is integrally provided, and an attachment screw hole 3c may be bored in the lower surface of the base portion 3 as shown in FIG.

<Effects> As explained in detail above, the magnetic head according to the present invention has a coil part in which a coil is molded, a core part consisting of a front core and a center core, and a base part supporting a back core, which are integrally molded. It has a structure in which the diameter of the coil wire in the coil part is increased and both ends are extended, and these are used as lead terminals, and the coil part serves as a holder, making it possible to reduce the size and weight.

In addition, since the coil wire diameter of the coil portion is made relatively thick, electrical resistance is low and a large current flows, and a large amount of flux is generated, thereby improving the efficiency of the magnetic head.

Therefore, by making the magnetic head smaller and lighter, portable V-Ts that combine the camera and magnetic tape have been developed.
It can be applied to R, etc., and the whole can be made smaller and more compact.

Furthermore, the number of man-hours required for assembling the magnetic head has been significantly reduced, and unlike conventional structures, there is no resin stress caused by assembling it into a holder and back-molding it, and there are also connection errors at the connection between the coil and lead terminal. Since there is no magnetic head or loss, it has practical effects such as being able to obtain a high-quality, high-performance magnetic head.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view showing a conventional embodiment; Figure 2 is an exploded perspective view showing a conventional embodiment;
1 is an assembled perspective view, FIG. 3 is an exploded perspective view showing another conventional embodiment, FIG. 4 is an exploded perspective view showing the structure of the magnetic head according to the present invention, and FIG. 5 is an exploded perspective view showing the structure of the magnetic head according to the invention. FIG. 4 is a perspective view after assembly, and FIG. 6 is a bottom perspective view showing the mounting portion of the magnetic head according to the present invention. 1...Coil part, 2...Coil, 3...Base part,
4... Lead terminal, 5... Center core, 6...
Front core, 7a, 7b...Gap, 8...
back core.

Claims (1)

[Scope of utility model registration request] In a magnetic head in which a coil part constituting an erasing head such as a V/T/R and a base part supporting a core part are integrally molded with resin, the diameter of the coil wire constituting the coil part is made thicker and the head part is shaped like a coil. A magnetic head characterized in that the extensions at both ends of the wound head are used as lead terminals.