JPS60106016A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To secure a wide space with excellent workability and to eliminate inconvenience such as disconnection, etc. when a coil is packed, by dividing a shielding plate to be set between head elements into two parts to set one of two divided shielding plates before package of the coil with the other plate set after package of the coil. CONSTITUTION:This magnetic head contains four head elements 21A-21D, and elements 21A and 21B as well as 21C and 21D are set symmetrical to each other respectively. The cores 22A-22D of elements 21A-21D are formed by butting a pair of approximately C-shaped half cores and have action gaps 23A-23D formed at the sliding side of a magnetic tape together with coils 24A-24D wound at the rear part respectively. Shielding plates 25-27 are divided into the 1st parts 41, 43 and 45 and the 2nd parts 42, 44 and 46. Then the 1st plates are set before the coils are packed, and the 2nd plates are set after the coils are packed. Thus a wide space is secured with no obstacle of those shielding plates when the coils are packed. This head improves the workability and eliminate inconvenience such as disconnection, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method of manufacturing a multi-channel 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.
The left half of the magnetic head in the figure before assembly (x - x in Figure 1)
(equivalent to a line cross-sectional view) is shown in Figure 2.

This magnetic head has four head elements IA-I11, and head elements IA and IB and head elements 10 and 10 are arranged symmetrically. Each head element IA to IO
The cores 2A to 2D are constructed by abutting a pair of C-shaped cores, and there are operating gaps 3A to 3 on the magnetic tape sliding side.
D, and coils 4A to 4D are wound around the rear part. Shield plates 5 to 7 each having the same shape as the outer periphery of the core are inserted between each head element IA-10,
Its role is to reduce crosstalk between adjacent tracks. And each head element IA-10 and shield plate 5~
7 is housed in a shield case 8 as shown in the figure to constitute a magnetic head.

To explain the method of manufacturing a magnetic head having the above configuration, first, as shown in FIG.
and shield plate 12.13.14' (shield plate 5.6.
7) to shield case 15 (shield case 8)
A half acenob January 6 which is assembled into the left half of the Acenobu January 6 and a half Acenobu January 6 which is symmetrical to this and has a similar configuration are manufactured. Next, coils 4A to 4 were wound around a bobbin (not shown).
D is wound on the rear side of the cores 2A to 2D, respectively, and the half assembly circles 18 are joined, and then the cores 2A to 2D are wound.
The magnetic head is completed by grinding the surface on the sliding side of the magnetic tape.

When manufacturing a magnetic head by the method described above, the coils 4A to 4I wound around the bobbin are used as the core 2A.
~ When installing on the rear side of 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, causing inconveniences such as wire breakage. There was a problem that it was easy to occur.

(Problems to be solved by the invention) The present invention has been made to solve the above 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, an embodiment in which the manufacturing method of the invention is applied to an auto-reverse type 4-track 4-channel magnetic head will be described with reference to the drawings.

FIG. 3 is a perspective view showing the magnetic head according to this embodiment;
The figure shows the left half of the magnetic head in Figure 3 before assembly (Y in Figure 3).
- Corresponds to a sectional view taken along the Y line). This magnetic head has four head elements 21A to 210 as in the conventional example described above, including head elements 21A, 21B and head element 2.
1C, 211) are provided symmetrically. The cores 22A to 22D of the head elements 21A to 21 [1 are constructed by butting together a pair of substantially C-shaped half cores, and have operating gaps 23A to 22 on the magnetic tape sliding side, respectively.
30, and coils 24A to 24D are wound around the rear part. More specifically, for example, the core 22A of the head element 21A is constructed by butting together substantially C-shaped half cores 31A and 31A', as shown in Figure $5, and the front parallel portions of the half cores 31A and 31A' 32A
, 32A' are joined to form a gap 23A,
On the other hand, a coil 24A wound around a bobbin is wound near the end where the rear parallel parts 33A and 33A' are joined. The head elements 21B to 21[1 also have a similar configuration. Shield plate 2 inserted between head elements 21A and 21B
5 consists of a first part 41 and a second part 42, as shown in FIG.

The first part 41 (41a, 41b) is installed before the coil is installed, and the second part 42 is installed after the coil is installed. Similarly, the shield plate 28 inserted between the head elements 21B and 21C has a first portion 43 and a second portion 44.
The first part 43a further includes two small parts 43a,
43b. And head element 21G
The shield plate 27 interposed between and 210 consists of a first part 45 and a second part 46, and the first part further consists of two small parts 45a t' 45b. Note that, for convenience, the drawings showing these are omitted because the same parts are duplicated.

The head elements 21A to 210 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 a magnetic head having the above-described structure will be described.

First, as shown in FIG.
310 (left half of cores 22A-22D) and small portion 41 of first portion 41.43.45 of shield plates 25-27
a, 43a, 45a, half core 31A
~310 (7) Small portions 41a and 43, respectively
a, 45a are inserted and assembled into the left shield case portion 28a so that their outer shapes match, and the nof cores 31A' to 310' (cores 22A-22D right half) and the first portion 41.43.4 of the shield plates 25-27
5 small parts 41b, 43b, 45b, /\-
Small portions 4 each between Fucoa 31A' and 31'D'
1b, 43b, and 45b are inserted and assembled into the right shield portion 28b so that their outer shapes match, thereby producing a half assembly 30'. Next, coils 24A to 24D wound around a poppin (not shown) are attached to the core 2.
Rear parallel parts 33A-33A'-33D- of 2A-22D
33D' to join the half assemblies 3o and 30'. Thereafter, the second portions 42, 44, 46 of the shield plates 25-27 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: 1. The shield plates 25 to 27 are divided into a first part 41, 43, 45 and a second part 42, 44, 46, 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,
Since mounting can be carried out in a wide space without the shield plate becoming an obstacle, there is an advantage that work efficiency is improved and inconveniences such as wire breakage do not occur.

(Effects of the Invention) As described above in detail, according to the manufacturing method of the present invention, the shield plate provided between the head elements is divided into two parts, one part is assembled before the coil is mounted, and the other part is assembled before the coil is mounted. It is installed after mounting, and a large space is secured when mounting the coil. 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, and Figure 2 is a perspective view of a conventional magnetic head.
3 is a perspective view showing a magnetic head according to an embodiment of the present invention, and FIG. 4 is a view of the left half of the magnetic head in FIG. 3 as seen in the arrow direction. 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-21D-Head element, 22A-22[]-Core, 23A-23D-Operation gap, 24A-24D-Coil, 25, 213.27--Shield plate, 28-m-Shield case, 30, 30- --Half assembly, 31A to 310 and 31A to 310- Half core, 4
1, 43.45-m-first part of shield plate, 42,
44.48-m-Second portion of shield plate. Figure 1 Figure 4 Figure 5 Figure 6A Figure 68

Claims (1)

[Claims] A pair of half assemblies are manufactured by incorporating a plurality of ζC-shaped half cores constituting each core of #i number of head elements into a shielding half case by inserting a shield plate between the half cores. , a method for manufacturing a multi-channel magnetic head by winding a coil around each core of the pair of half assemblies and joining the pair of half assemblies, wherein the shield plate is attached to a first portion and a second portion; the first part is assembled before the coil is attached, and the second part is assembled into the second part.
A method of manufacturing a magnetic head, characterized in that the first part is assembled after the coil is mounted, and the first part is assembled so as to provide a sufficient space for mounting the coil.