JPH056565Y2 - - Google Patents

Description

[Detailed explanation of the invention] (3-1) Industrial application field The present invention relates to magnetic heads for video tape recorders, etc., and in particular, to audio control heads, etc., in which two head bodies are housed in one case. This invention relates to a magnetic head core holder.

(3-2) Prior Art Magnetic heads for video tape recorders, etc., such as audio control heads, which consist of two head bodies housed in one case are conventionally shown in Figs. 2 to 7. It has a structure as illustrated in (both diagrams showing component parts), and was assembled in the order described below. That is, the second
As shown in the figures (A is a front view and B is a side view), the magnetic head core 1 has a substantially J-shape. As shown in FIG. 3 (A is a front view and B is a side view), the coil 2 is composed of a coil bobbin 2A, a winding 2B, a terminal pin 2C, etc. Furthermore, as shown in Figure 4 (A is a front view, B is a side view), the holder 3
is approximately in the shape of a scalene angle. Attach two magnetic head cores 1 to this holder as shown in FIG. Next, one magnetic head core 1 is attached to each coil 2, and the surfaces of one end 1A of each head are brought into contact with each other, and the surface of the other end 1B is brought into contact with each other via a spacer. Head body assembly 1 as shown in Figure 6 (front view)
1 can be obtained.

FIG. 7 shows the case, in which A is a plan view, B is a front view, and C is a side view. In the figure, the case 4 is box-shaped, and one surface (lower surface in the figure) is an opening 4A, and the opposite surface is a curved surface like a part of the side surface of a cylinder. This forms the tape running surface 4B. A shield block 5 is attached to the center of the tape running surface, and approximately rectangular openings 4 are provided on both sides of the shield block 5.
C is provided. The head main body assembly 11 shown in FIG. 6 is inserted and fixed through the opening 4A of the case 4, and the magnetic head for the desired video tape recorder can be obtained through predetermined work steps such as polishing the tape running surface. can. Each head body 12
The head gap (see FIG. 6) is inserted into the opening 4C of the case and forms part of the tape running surface.

In the conventional magnetic head obtained by the configuration and assembly method described above, it is necessary to attach the magnetic head core 1 to the holder 3 as explained in FIG. The method was as follows. In other words, in FIG. 8 (A is a front view, B is a side view, and C is a cross-sectional view of FIG. The head core 1 is inserted and attached by caulking the inserted portion as shown in Figure 3B. However, such a mounting method requires that the dimensions of the groove 3A be extremely accurate, and therefore the holder 3 must be made of die-cast copper alloy or the like, which takes time to manufacture and increases costs. There was a drawback.

Another method is to fix the magnetic head core by bending a part of the holder, but in this case it is necessary to temporarily fix the magnetic head core with resin, etc., which is time-consuming and increases the cost. It was impossible to avoid his shortcomings.

(3-3) Problems to be Solved by the Invention The present invention simplifies the installation of the magnetic head core by using a holder that eliminates the above-mentioned drawbacks of conventional magnetic heads for video tape recorders, etc., and reduces the cost. The aim is to provide a low-cost magnetic head.

(3-4) Means for Solving Problems and Their Effects The present invention consists of two approximately J-shaped magnetic head cores whose ends are brought into contact with each other, one of which is used as a head gap portion, and the core. The above-mentioned problems have been solved by attaching two head bodies consisting of a coil wound around the magnetic head to a holder and inserting it into the case.The magnetic head is constructed as shown below. There is. That is, both ends of the holder are bent parts, and the holder is provided with two protrusions. The magnetic head core of each of the two head bodies is sandwiched between the two head bodies, and the magnetic head cores of the two head bodies are pressed together to attach them, and then the coil and the other magnetic head core are attached, and the head bodies are assembled by inserting them into the case. .

In this way, there is no need to use die casting, which is complicated to manufacture, as a holder, and there is no need to temporarily attach the magnetic head core to the holder, making it extremely easy to attach the magnetic head core to the holder.

(3-5) Examples Examples of the present invention will be described below based on the drawings. Figure 1 shows a method of attaching a magnetic head core to a magnetic head holder according to the present invention, in which A is a front view, B is a side view, and C is a cross-sectional view from H to H in Figure A viewed in the direction of the arrow. This is an enlarged view. In the figure, the holder 3 is provided with two protrusions 3C, and bent portions 3D are provided at both ends thereof. The bent portion 3D is made as shown by the two-dot chain line in Figure A when the holder is manufactured. The holder 3 has a scalene angle shape, and the surfaces at both ends of the short side 3E are protrusions 3.
It is flush with one surface of C. One side surface of the magnetic body 1 is brought into contact with this plane, and then the bent portion 3D is bent as shown by the solid line in Figure A, and the convex portion 3F is
By pressing the side surface of the magnetic head core 1, the magnetic head core 1 is attached to the holder 3.
installed on. Since the magnetic head core 1 is supported at three locations: the end surface of the short side 3E of the holder, one surface of the protrusion 3C, and the convex portion 3F of the bent portion, attachment and centering are easy. The manufacturing method of the magnetic head after attaching the magnetic head core to the holder is the same as the conventional method described above.

Although the embodiments described above mainly relate to the audio control head of a video tape recorder, the present invention can also be applied to other magnetic heads as long as two head bodies are housed in one case. Of course, it can also be effectively implemented in cases where three or more head bodies are housed in one case by increasing the number of protrusions and bent parts to three or more.

(3-6) Effects of the invention This invention attaches a magnetic head core, which forms the core of a magnetic head for a video tape recorder, such as an audio control head, in which two head bodies are housed in one case, to a holder. By sandwiching and fixing the magnetic head between the protrusion provided on the holder and the bent part, the magnetic head can be easily attached to the holder, which has the extremely excellent effect of significantly reducing the cost of the magnetic head. It has the following.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the method of attaching the magnetic head holder and magnetic head core according to the present invention, in which A is a front view, B is a side view, and C is an enlarged cross-sectional view from A to A when viewed in the direction of the arrow. 2 to 7 are cross-sectional views showing the components of a conventional magnetic head and the order of their assembly. FIG. 2 shows the magnetic head core, FIG. 3 shows the coil, and FIG. Figure 4 shows the holder, Figure 5 shows the magnetic head core attached to the holder, A is the front view, B is the side view, and Figure 6 is the head body assembled. , Figure 7 shows the case, where A is a plan view, B is a front view, C is a side view, and Figure 8 is a side view.
The figure shows the conventional method of attaching the magnetic head core to the holder. A is a front view, B is a side view,
C is a sectional view of the cross section taken along the line C--H in FIG. 1... Magnetic head core, 1A, 1B... End, 2... Coil, 2A... Coil bobbin, 2B
... Winding wire, 2C ... Terminal pin, 2D ... Hole, 3 ...
...Holder, 3A...Groove, 3B...Caulking part, 3
C...Protrusion, 3D...Bent part, 3E...Short side,
3F...Protrusion, 4...Case, 4A...Opening, 4
B...Tape running surface, 4C...Opening, 5...Shield block, 11...Head main body assembly, 12
...Head body.

Claims (1)

[Scope of utility model registration request] Two head bodies are attached to a holder, each consisting of a core in which both ends of two roughly J-shaped magnetic bodies are brought into contact with each other, one of which is used as a head gap, and a coil wound around the core. In the magnetic head inserted into the case, both ends of the holder are bent parts, and the holder is provided with two protrusions, and the core is connected to the two protrusions. A magnetic head core holder characterized by being clamped and fixed by a bent portion.