JPH0812816B2 - coil - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil used in products such as transformers and magnetic force generators for the purpose of miniaturization, light weight, and high efficiency.

2. Description of the Related Art Conventionally, this type of coil has been manufactured as shown in FIG. That is, the ring-shaped coil 3 shown in FIG. 3 was formed by winding the copper wire 1 having a round cross section in the winding frame 2. Depending on the application, the pin 4 is inserted into the winding form frame 2 in the middle of the winding to form the rectangular coil 5 shown in FIG. FIG. 5 shows a sectional view of the coils 3 and 5.

Problems to be Solved by the Invention However, in such a coil, if the winding start lead wires 3a and 5a are drawn to the outside diameter side of the coil, this leads to an increase in the coil thickness of the drawn lead portion.

Therefore, an object of the present invention is to prevent an increase in coil thickness due to the lead wire being drawn out.

Means for Solving the Problems In order to solve the above problems, the present invention has a spiral-shaped conductive sheet having lead terminals at one end at the inner end and two lead terminals at the outer end between thin insulating sheets. A plurality of coil bodies of the same shape configured by providing a metal foil are provided, and the first coil body is laminated and fixed to the first coil body while rotating or reversing the second coil body. The lead-out terminals at the inner ends of the coil body or the one lead-out terminals at the outer ends are connected to each other.

In the above-mentioned structure, the first and second coil bodies to be stacked are the same shaped coil body having the conductive connection terminals at one location at the inner end and at two locations at the outer end. While the body is rotated or inverted, it is laminated on the first coil body, and the inner end conductive connection terminals or one outer end conductive connection terminals are pierced through the thin insulating sheets on the front and back of the coil body. Connection will form a coil of the desired rating.In this case, since the lead wire is not drawn out to the outside of the coil, there is no increase in coil thickness, and a coil body of the same shape is used. Since they are stacked in a state of being rotated or inverted, the number of parts can be reduced by standardization, and the cost increase can be suppressed.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1a to 1d show an embodiment of the present invention.

In FIG. 1a, 6 is a thin insulating sheet, and a spiral conductive metal foil 10 is embedded in the insulating sheet 6. That is, the insulating sheets 6 are present on the front and back of the conductive metal foil 10. Conductive connection terminals 7 to 9 are formed at one inner end and two outer ends of the spiral conductive metal foil 10.

FIG. 1b is a second sheet coil having the same structure as the first sheet coil of FIG. 1a, except that the sheet of FIG. 1a is turned upside down in the vertical direction. It is laminated on the lower surface side of the coil. In this manner, FIGS. 1a and 1b are overlapped with each other, and the conductive connection terminals 7 at the inner ends are penetrated through the insulating sheet 6 between them, and are conductively connected by welding or the like.

Fig. 1c shows a third sheet coil having exactly the same configuration as Fig. 1a, except that the one shown in Fig. 1a is laminated on the lower surface side of the sheet coil of Fig. 1b in a state of being inverted by 180 degrees. At the same time, the upper and lower conductive connection terminals 9 and 8 are connected by penetrating the insulating sheet 6 between them. FIG. 1d shows a fourth sheet coil, which is the same as in FIG. 1b and is laminated in a state in which the sheet shown in FIG. 1c is turned upside down.
7 and 7 are connected by penetrating the insulating sheet 6 between them.

When the conductive connection terminals 8 or 9 of FIG. 1a are set to the input side, the first to fourth four sheet coils laminated and formed in this way have the external conductive connection terminals 8 of FIG. 1d, Alternatively, 9 is the output side, which is a set of thin sheet coils.
An appropriate number of sheets are laminated and fixed by the above means.

EFFECTS OF THE INVENTION As described above, the present invention is configured by providing a conductive metal foil which has a spiral shape and has conductive connection terminals at one location on the inner end and two locations on the outer end, between thin insulating sheets on the front and back. A plurality of shaped coil bodies are provided, and the first coil body is laminated and fixed to the first coil body in a state where the second coil body is rotated or inverted,
The second coil body has the inner end connected to the conductive connection terminals, or the outer end connected to one of the conductive connection terminals.

In the above configuration, the first and second layers to be stacked
The coil body is a coil body of the same shape having conductive connection terminals at one location on the inner end and two locations on the outer end, and the first coil body is rotated or inverted. By stacking and connecting the inner end conductive connection terminals or one of the outer end conductive connection terminals through the thin insulating sheets on the front and back of the coil body, a coil with the desired rating is formed. , In this case, since the lead wire is not drawn out to the outside of the coil, the coil thickness does not increase, and since the coil body having the same shape is used, the coil body is laminated in the rotated or inverted state. The number of parts can be reduced by standardization, and cost increase can be suppressed.

[Brief description of drawings]

1A to 1D are development views showing an embodiment of the coil of the present invention, and FIG. 2 is a perspective view of a jig for forming a flat-wound coil by a conventional round copper wire or the like. 4 and 5 are perspective views of round and square flat winding coils, and FIG. 5 is a sectional view of the flat winding coil. 6 ... Insulating sheet, 7-9 ... Conductive connection terminal, 10 ... Conductive metal foil.

Claims (1)

[Claims] Claims: 1. A coil body having the same shape, which is formed by providing a conductive metal foil having a conductive connection terminal at one position at the inner end and at two positions at the outer end in a spiral shape between thin insulating sheets on the front and back. A plurality of sheets are provided, and the second coil body is rotated or inverted on the first coil body and laminated and fixed, and the conductive connection terminals at the inner ends of the first and second coil bodies are connected to each other or at the outer ends. A coil in which one of the conductive connection terminals is connected.