JPH043565B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for manufacturing a multichannel magnetic head used in tape recorders and the like.

(Background Art) A perspective view of a conventional multi-element magnetic head is shown in FIG. 1, and the left half of the magnetic head in FIG. As shown in the figure.
This magnetic head has four head elements 1A to 1D, head elements 1A, 1B, head elements 1C,
1D is provided symmetrically. Each head element 1A-1D and core 2A-2D is constructed by butting a pair of C-shaped cores, and has operating gaps 3A-3D on the magnetic tape sliding side, and coils 4A-4D on the rear side. It is wrapped. Shield plates 5 to 7 having the same shape as the outer periphery of the core are interposed between each of the head elements 1A to 1D, and serve to reduce crosstalk between adjacent tracks. Each of the head elements 1A to 1D and shield plates 5 to 7 are housed in a shield case 8, as shown, to constitute a magnetic head.

To explain the method of manufacturing the magnetic head having the above configuration, first, as shown in FIG.
~ left half of 2D) and shield plates 12, 13, 14
A half assembly 16 formed by assembling (the left half of the shield plates 5, 6, and 7) into the shield case 15 (the left half of the shield case 8) and a half assembly 16 symmetrical with this and having the same configuration are manufactured. Next, coils 4A to 4D are wound around a bobbin (not shown).
are wound around the rear sides of the cores 2A to 2D, respectively, and the half assemblies 16 and 16' are fitted, and then the magnetic tape sliding side surfaces of the cores 2A to 2D are ground to complete the magnetic head. .

When manufacturing a magnetic head by the method described above, the coils 4A to 4 wound around the bobbin
When attaching D to the rear side of the cores 2A to 2D, the shield plates 5 to 7 become obstacles, making it difficult to assemble the coils 4A to 4D, and the collars of the coils and bobbins come into contact with the shield plates 5 to 7, resulting in wire breakage. There was a problem that such inconveniences were likely to occur.

(Problems to be solved by the invention) The present invention has been made to solve such problems, and is to provide a method for mounting a coil wound around a bobbin on a core with good workability and without causing inconveniences such as wire breakage. An object of the present invention is to provide a method for manufacturing a channel magnetic head.

(Structure and operation of the invention) Hereinafter, the manufacturing method of the present invention will be described.
An embodiment applied to a track 4 channel magnetic head will be described with reference to the drawings.

3 is a perspective view showing the magnetic head according to this embodiment, and FIG. 4 shows the left half of the magnetic head in FIG. 3 before assembly (corresponding to the sectional view taken along the line Y--Y' in FIG. 3).
This magnetic head has four head elements 21A to 21D as in the conventional example described above, head elements 21A, 21B and head elements 21C, 21D.
are arranged symmetrically. The cores 22A to 22D of the head elements 21A to 21D are constructed by butting a pair of substantially C-shaped half cores, and each has an operating gap 2 on the magnetic tape sliding side.
3A to 23D, and the rear part has coils 24A to 23D.
24D is wrapped. To explain in more detail, for example, the core 22A of the head element 21A has substantially C-shaped half cores 31A, 31, as shown in FIG.
A gap 23A is formed by joining the front parallel parts 32A, 32A' of the half cores 31A, 31A', and a bobbin is formed near where the rear parallel parts 33A, 33A' are joined. A wound coil 24A is wound thereon. The bed elements 21B to 21D also have a similar configuration. The shield plate 25 inserted between the bed elements 21A and 21B consists of a first part 41 and a second part 42, as shown in FIG. 6A or 6B. small part 41
It is composed of a and 41b. first part 41
(41a, 41b) are installed before installing the coil,
The second part 42 is installed after installation of the coil.
Similarly, the shield plate 26 inserted between the head elements 21B and 21C consists of a first part 43 and a second part 44, and the first part further has two small parts 4.
It is composed of 3a and 43b. The shield plate 27 inserted between the head elements 21C and 21D consists of a first part 45 and a second part 46, and the first part further has two small parts 45a and 45.
It is composed of b. Note that, for convenience, the drawings showing these are omitted because the same parts are duplicated. The head elements 21A to 21D and the shield plates 25 to 27 configured as described above are housed in the shield case 28 to constitute the magnetic head according to this embodiment.

Next, a method of manufacturing the magnetic head having the above structure will be explained.

First, as shown in FIG.
1A to 31D (the left half of the cores 22A to 22D) and the first portions 41, 43 of the shield plates 25 to 27,
The small portions 41a, 43a, 45a of 45 are placed between the half cores 31A to 31D, respectively.
a, 43a, 45a are inserted and the left side shield case part 2 is inserted so that their outer shapes match.
The half assembly 30 assembled into the core 8a, and the half cores 31A' to 31D' core 22 symmetrical thereto.
right half of A to 22D) and small portions 41b, 4 of the first portions 41, 43, 45 of the shield plates 25 to 27
3b, 45b, half cores 31A' to 31
Small parts 41b, 43b, 45 respectively between D'
A half assembly 30' is manufactured by inserting the part 28b into the right shield part 28b so that the outer shapes of the parts 28b and 28b match each other. Next, the coils 24A to 24D wound around a bobbin (not shown) are attached to the rear parallel portions 33A to 33A' of the cores 22A to 22D.
Attach to 33D-33D' and half assembly 3
0,30' are joined. After that, shield plate 2
The second portions 42, 44, and 46 of No. 5 to 27 are inserted into predetermined positions, and the magnetic tape sliding side of the magnetic head is ground to complete the desired magnetic head.

According to the above method, the shield plates 25 to 27 are connected to the younger brother 1 parts 41, 43, 45 and the second part 42,
It is divided into 44 and 46 parts, and the former is assembled before the coil is mounted, and the latter is assembled after the coil is mounted.
Therefore, when mounting the coil, the shield plate can be used in a wide space without being an obstacle, which improves work efficiency and has the advantage that problems such as wire breakage do not occur.

(Effects of the Invention) As explained in detail above, according to the manufacturing method of the present invention, two shield plates are provided between the head elements.
It was divided into two parts, one part was assembled before the coil was mounted, and the other part was assembled after the coil was mounted, thereby ensuring a large space when mounting the coils. Therefore, there is an advantage that workability is improved and inconveniences such as wire breakage are eliminated.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional magnetic head; Figure 2 is a perspective view of a conventional magnetic head;
3 is a perspective view showing the magnetic head according to an embodiment of the present invention, and FIG. 4 is a left half of the magnetic head in FIG. 3 when viewed in the direction of the arrow. FIG. 5 is a diagram illustrating the configuration of the head element, and FIGS. 6A and 6B are diagrams illustrating the configuration of the shield plate. 21A to 21D...Bed element, 22A to 22
D...core, 23A-23D...operation gap,
24A to 24D...Coil, 25, 26, 27...
...Shield plate, 28...Shield case, 30,
30'...Half assembly, 31A to 31D and 31A' to 31D'...Half core, 41, 43,
45...first portion of shield plate, 42, 44,
46...Second part of the shield plate.

Claims (1)

[Claims] 1 Almost C constituting each core of a plurality of head elements
A pair of half assemblies are manufactured by incorporating a plurality of letter-shaped half cores into a shielding half case by inserting a shield plate between the half cores, and a coil is respectively attached to each of the cores of the pair of half assemblies. In the method for manufacturing a multi-channel magnetic head by winding and joining the pair of half assemblies, the shield plate is divided into a first part and a second part, and the first part is divided into a first part and a second part. The second part is assembled before the coil is installed, and the second part is installed after the coil is installed, and the first part is installed so as to provide sufficient space for the coil to be installed. A method of manufacturing a magnetic head.