JPH0298110A - Manufacture of printed coil - Google Patents

Abstract

PURPOSE:To improve the production yield of a printed coil by printing a lead section and coil section in horizontally lying states against a projecting section on an insulating sheet and installing stripe-like cuttings in part of the lead section, and then, projecting the stripe-like cut piece by bending. CONSTITUTION:A coil section 21 and lead section 22 are formed on an original plate 1 by printing and etching. Stripe-like cuttings 3 are installed in the insulating sheet section of the lead section 22 with a Thomson blade and the stripe like cut piece 30 is bent to project. Therefore, the original plate can be reduced in size by the section almost corresponding to the horizontal length l of the L-shaped lead section. Moreover, a printed coil transformer can be manufactured smoothly in such a way that an upper-layer and lower-layer printed coils are piled up on another printed coil while the lead is kept in a horizontally lying state (nonprojecting state) and the lead section is then bent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a method for manufacturing a printed coil having a lead portion.

[Conventional technology]

When manufacturing transformers, motors, etc. by laminating printed coils, as shown in No. 528, lead portions a' and a' are provided protruding from the top and bottom printed coils,
This lead portion may be excluded and the laminated portion A' may be molded with resin.

[Problem to be solved]

Conventionally, when manufacturing such printed coils, the copper foil of the board, which is made by laminating the copper foil to the insulating sheet, is etched.
As shown in m8, the coil pattern 21' and the lead conductor 22' are formed, and then the surplus part b' of the insulating sheet is
, b'' are removed by cutting.Considering the loss of copper foil in this surplus portion, it is extremely uneconomical.

An object of the present invention is to provide a method of manufacturing a printed coil with lead portions by substantially eliminating the above-mentioned surplus portions.

[Means to solve the problem]

The method for manufacturing a printed coil according to the present invention is a method for manufacturing a printed coil in which a coil portion is printed on an insulating sheet main body, and a lead portion is printed on an insulating sheet strip that can protrude from the sheet main body. It is characterized by printing the lead part in a horizontally lying form and the above-mentioned coil part on an insulating sheet, making a rectangular cut in the insulating sheet part of the lead wire, and bending this cut piece to make it protrude. It's a method.

[Explanation of Examples]

The present invention will be explained below with reference to the drawings.

In order to manufacture a printed coil according to the present invention, as shown in FIG. and the lead portion 22 are formed by a printing/etching method. This lead part 2
The second form is an L-shaped lying down form.

After printing the lead part on the coil lead in this way, as shown by 3 in FIG. As shown in FIG. 1B, the strip-shaped cut piece 30 is bent to protrude.

The above original plate has an approximately L-shaped horizontal length of the lead portion (β in Fig. 1A) compared to the original plate required in the conventional method.
It can be made smaller by the length corresponding to .

The printed coil manufactured according to the present invention can be used, for example, as the two-layer printed coil and the bottom printed coil of a printed coil transformer. Stack the bottom layer printed coil on other printed coils,
After this layering, it is desirable to bend the lead portion to protrude, in order to facilitate the layering operation.

The horizontally lying form of the lead part in the present invention is not particularly limited as long as the lead part and the coil part can be formed on a smaller original plate than the original plate required in the conventional method. For example, as shown in FIG.
It may be something like the one shown in 22. In Figure 2,
3 is a notch for cutting the rectangular shape by i″F.

In the above, the bending direction of the lead part can be selected as appropriate.
For example, reverse bending as shown in Figure 2B, or Figure 2C
It is also possible to make a 90" bend as shown in FIG.

Moreover, as shown in FIG.
printed on both sides (the coil is conductive in the center),
The coils on the back side of each half are connected by a straight line printed part 23, and the lead part 22 of each front side coil is connected at the boundary of each half.
a, 22b are printed, and strip-shaped cuts 3a, 3b are made in the insulating sheet portion of each lead, respectively.
As shown in Figure 3B, by folding both halves la, 1
It is also possible to overlap the lead portions 22a and 22b and bend the lead portions 22a and 22b to protrude. In this example, each half 1a
, 2b are connected in series.

When connecting both coils in parallel, as shown in FIG.
+, they are connected to each other by a straight line printed part 232 on the back side, and lead parts 22a and 22b (conductor width is approximately twice the conductor width of the coil part due to current capacity) are printed in the middle of each straight line printed part 231 and 232. , each lead part 2
Short Ill-shaped cuts 3a and 3b are made in the insulating sheet portions 2a and 22b, respectively, and then, as shown in FIG.
Just bend b to make it protrude.

〔Effect of the invention〕

The method for manufacturing a printed coil according to the present invention is as described above, in which the lead portion is printed in a horizontally lying form without protrusions, and then a rectangular cut is made, and this is bent to form the lead portion. Since the wire protrudes, a coil having a protruding lead portion can be manufactured from a small original plate, and the loss of the original plate can be sufficiently reduced.

[Brief explanation of the drawing]

1A and 1B are explanatory diagrams showing one embodiment of the present invention. FIG. 1A shows the lead portion in a horizontal state, and FIG. 1B shows the lead portion in a protruding state. It shows. Second
FIG. A1, FIG. 2B, and FIG. 2C are explanatory diagrams showing other embodiments of the present invention, and FIG. 2A shows the lead portion in a horizontal state.
FIG. 2B shows the lead wire when it is inverted and folded, and FIG. 2C shows the lead wire when it is bent at a right angle. 3A and 3B are explanatory diagrams respectively showing the lead portion in the horizontal state and the lead portion in the protruding state in another embodiment of the present invention, and FIG. 4A and FIG. 4B are FIG. 5A is an explanatory diagram showing a conventional printed coil transformer, and FIG. It is an explanatory view showing a printed coil used in the same printed coil transformer. In the figure, 21.2]a and 21b are coil parts, 22.
22a, 22b are horizontally lying lead parts, 3.3a, 3b
is a rectangular cut. ? ? Spear 2 figure C ＼ 2 and 77 and 74 fields β

Claims (1)

[Claims] In a method for manufacturing a printed coil, a coil part is printed on an insulating sheet main body part, and a lead part is printed on an insulating sheet strip part that protrudes from the sheet main body part,
The feature is that the lead part in the horizontally lying form and the coil part are printed on an insulating sheet in contrast to the protruding form, a rectangular cut is made in the insulating sheet part of the lead part, and this cut piece is bent to make it protrude. A method of manufacturing a printed coil.