JPS5888818A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To obtain a double-channel magnetic head which is small-sized and lightweight, by forming a magnetic shielding plate, a coupling part and a terminal part in one body after blanking a magnetic plate material and forming a terminal board provided with a shielding plate insulated with a resin to the above-mentioned unified matter excluding the coupling part. CONSTITUTION:A sheet metal part 14 is formed with 4 terminal parts 13 extending via a magnetic shielding plate 11 and a coupling part 12. Plural coupling plate parts 15 including the part 14 are obtained by applying the blanking press to a ''Permalloy '' plate 16. An H-shaped insulated terminal board part 17 formed with the resin is fitted to the part 14 excluding the part 12. Then a terminal 13 is cut at positions shown by chain lines 18, 19 and 20 between the parts 14. Thus a terminal board 22 having a shielding plate having a part 23 where the terminals are bundled is obtained. Then a back core 1 having a winding 24 is provided at the accepting parts 17A and 17B of the right and left terminal boards 17 which hold the plate 11 in between. The core 1 is put into a shielding case 8 with a front core 2 joined together and then fixed with the resin. Thus a small-sized magnetic head is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a magnetic head suitable for application to a method for manufacturing magnetic heads for audio and video applications, which have recently become smaller and lighter.

In this type of magnetic head, for example, as shown in FIG. (2
) A pair of head elements (6) in which a bobbin (4) (bobbin with one terminal) is attached to which the K terminal (3) is integrally wound.
% (6) is inserted into a shield case (8) via a magnetic shield plate ( )) and fixed with resin.

(9) is a non-magnetic master provided on the tape contacting surface. In addition, as another example, instead of the above-mentioned bobbin with terminal (4)K, as shown in Fig. 2, the terminal (3) is integrally formed and insertion grooves (IOA) and (IOB) are respectively formed on the upper surface. There is also a terminal block in which a pack core (16 mm) and a magnetic shield plate (7) are arranged in each of the groove (16 mm) and (IOB) of this terminal block.

However, such a bobbin with a terminal (4) or a third
A magnetic head using the terminal block a shown in the figure has a structural KR field when it is miniaturized by sandwiching between channels or by reducing the depth of the head. It also had the disadvantage of high costs.

The present invention provides a method for manufacturing a magnetic head that makes it possible to reduce the size and cost of the sickle magnetic head in view of the above-mentioned points.

In the present invention, the magnetic shield plate and the terminal part are formed from the same plate material through the connecting part, and after the magnetic shield plate and the terminal part are connected by resin molding at a part other than the connecting part, the connecting part is cut and separated. According to K, a magnetic head is manufactured by forming a terminal block with a cV lead plate, connecting a head core with a wound wire to this terminal block, and inserting and fixing it into a shield case. , the magnetic shield plate and the terminal block are integrated, and each terminal part is on the same plane as the magnetic shield plate, so the magnetic head can be made smaller and thinner, and the # structure is lower. This allows for cost reduction.

Embodiments of the present invention will be described in detail below with reference to the drawings.

3WJ to FIG. 7 show cases in which the present invention is applied to manufacturing a two-channel magnetic head. In this example, first, as shown in FIG. - Connect a plurality of sheet metal shafts each consisting of a magnetic shield plate a and four terminal parts 0 integrally from one side of the plate through a connecting part a2 using a plate. In this case, the sheet metal part a4
The four terminals SaW in 1 are parallel to each other, and their ends are connected to each other, and each sheet metal part a is connected to the other side of the magnetic shielding plate αυ opposite to the terminal part a3 side. They are mutually connected to the connecting plate portion 09. The punched plate shaft having the plurality of sheet metal parts α fathom is once annealed to remove processing distortion, and in consideration of soldering properties, all of the sheet metal parts A4 are plated with wK tin. is allowed.

Next, as shown in FIG. 4, each sheet metal part 64K is molded with resin to connect the magnetic shield plate sacrificial plate υ and the four terminal parts a3 at the part excluding the connecting part a3, thereby providing an insulating property. Terminal block 1
11Sa71 is formed. This terminal block part an& forms an H-shaped part when viewed from above so that the connecting part (13 is exposed), and a partially protruding receiving part (17m) to facilitate positioning of the pack core in a later process. (17B).

Next, as shown by the chain lines fi 碍, a・, and kiln in FIG. With a shield plate, the connecting portions D between the free ends of the shield case υ and the four terminals a3 shown in FIG. A terminal block (2) is formed. In this case, each terminal portion 63 has a portion (2
) remains.

Next, as shown in Figure 1117, the terminal block with a shield plate (
2) Left and right receiving parts (17mm) that sandwich the magnetic shield plate @D
and (17B) K each winding c! Pack cores (1) and (1) are arranged, and each pack core (
1) and the shield case (1) with the fugastric cant core (2) and (1) having the operating magnetic gap g attached.
8) Insert it into the V-shaped case so that its operating gap faces through the window hole of the V-led case, and fix it with resin to form the desired two-channel magnetic bed (c).

In addition to the one example of the terminal block with shield plate (2) for the goose channel, for example, as shown in Figs. The terminal block portion a1 can be configured to have a flush structure across the plate I and the terminal portion a3111. In this case, the placement of the grasshopper cores (x) and (t) is as shown in Part 3.
It is possible to do it like a picture wall.

According to this manufacturing method, the four terminal parts are arranged on the same plane along the plate surface of the magnetic shielding plate αυ, and the magnetic shielding plate αD and the terminal block part αη are integrated, and the terminal block part Since the head (a) is positioned by the side surfaces of aη that sandwich the shield plate al, the magnetic head can be made thinner and smaller. In addition, since the magnetic shield plate ■ and the terminal part 0 are integrated by the separation process shown in Fig. 5, they are reinforced and can be manufactured with a complicated punched press shape or a thin plate material, allowing for thinner magnetic heads. , enabling miniaturization. IL et al.
The magnetic shield plate aυ and the terminal part (ls are made of the same plate material and integrated)
Since the cflt type is -t and b, only one mold is required, and the process of gluing the magnetic shield plate to the terminal block can be omitted.
Manufacturing costs can be reduced.゛Figures 10 to 14 show other embodiments of the present invention.
oWJK As shown, the magnetic shield plate 4Iυ is integrated with one side of it [7-shaped connection IB (2
A state in which a plurality of sheet metal parts a9 consisting of the terminal part a3 of the book are connected by punching and pressing from a permanent board as in the first example! In this case, each sheet metal part 09 is the terminal part 0.
0 It is connected by a connecting plate part aSK on the roadside side.

Next, after performing % annealing treatment and tin plating as necessary, each sheet metal part CIIIK is coated with %
An insulating terminal base part (to) is formed by connecting the magnetic shield plate aυ and the two terminal parts a3 by resin molding so as to leave a T-shaped connecting part a3. At this time, the terminal block portion (to) has a divided structure in which both terminal portions αj and the corresponding portions of the V-lead plate aυ are connected. and,
Each of the divided terminal block portions (2) is formed so that the cross-sectional shape on the line connecting the magnetic shield plate a1 and the terminal portion a3 is L-shaped.

Next, the 1111th! As shown by chain lines (to), (to), and (to), the connection plate part a between each sheet metal part 09 and the connection part az between each terminal part 63 are cut, and the connection part az between each terminal part 63 is cut. 12 and 1811, and between the two terminal parts a3 and between the magnetic shield plate @υ and the terminal part aJ are electrically separated to form a terminal block with a shield plate. Terminal block with shield plate (liK, No. 141!I
Pack core with K11llll (foundation) as indicated by K.
1), and then insert the pack core (1) K in the same manner as in the above example.
The magnetic head is constructed by joining the y vx toner and inserting it into a shield case, and fixing it with resin. Since the structure shown in FIG. 14 is for one channel, when configuring a multi-channel magnetic head, for example, a two-channel magnetic head, two of the structures shown in FIG. 14 are used to configure a two-channel magnetic head. Eggplant.

In this manufacturing method, the three terminal parts 0 are arranged on the same level as the magnetic shield plate υ, similar to the top strip, so the head can be made thinner and smaller, and manufacturing is easy. You can also reduce costs. By using a plurality of single-channel magnetic heads of all 1411 in nature, a multi-channel magnetic head having two or more channels can be easily obtained.

As mentioned above, the manufacturing method of the present invention makes it easier to make magnetic heads thinner and smaller, and to reduce costs. Therefore, it is possible to manufacture magnetic heads for audio and video applications, which are becoming smaller and lighter. It is suitable for application.

Brief explanation of Elf The first part is a schematic cross-sectional view showing an example of a conventional magnetic head.
FIG. 2 is a front view showing an example of a conventional terminal block, FIGS. FIG. 14 is a process diagram showing still another embodiment of the present invention, and FIG. 13 is a side view of FIG. 12.

■ is a magnetic shield plate, a is a connecting part, (13 is a terminal part,
aη indicates the terminal block, and (2) indicates the terminal block with shield plate↑.

@Figure 1 Figure 2 Figure 11 Figure 12 Figure 13 Figure 14

Claims (1)

[Claims] Connect the shield plate and terminal part from the same plate through the connecting part.
A bale in which the shield plate and the terminal part are connected by resin molding at a part other than the connecting part, a head tour with 41 wires is connected to a terminal block with a shield plate obtained by cutting and separating the connecting part, and the shield is connected. A method of manufacturing a magnetic head that is inserted and fixed into a case.