JPS5914618A - Coil apparatus - Google Patents

Abstract

PURPOSE:To quickly and economically obtain a product by inserting a magnetic core at the inside of a plurality of ?-shaped conductive materials arranged and fixed with an equal interval and by connecting in series both ends of said conductive material at the rear side of printed circuit board. CONSTITUTION:A plurality of ?-shaped conductive materials 3 are arranged with almost equal intervals, a magnetic core 22 is inserted to the inside of a structure where these insulators 4 are fixed and it is covered with a cover 5 consisting of an insulator. Both ends of material 3 are connected at the rear side of printed circuit board 8, the adjacent material 3 are electrically connected in series. Thereby a coil can be formed. The coil having such wiring structure can be manufactured very easily and formed economically within a short period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a coil winding method. Traditionally,
Although it is easy to wind a decomposable magnetic material such as BI type cocoa, it is not easy to wind a ring-shaped magnetic material.

When winding a magnetic material that cannot be separated into two parts, such as a ring, there are two methods: by hand and by using an automatic winding machine. Manual winding is time-consuming, expensive, and has five drawbacks: it is easy to wind the wrong number of windings.

Winding with an automatic winding machine is effective when there are a large number of turns, but it is not easy when winding a small core or using thick wire, and it is not easy to wind with an automatic winding machine. Sera) K
Because it takes time, the price of the coil is not necessarily cheap. In addition, for coils that require a constant distributed capacitance between the windings, it is difficult to meet this requirement with the manual winding method, so winding with an automatic winding machine is difficult. This method also takes time to adjust. Therefore, there is a strong demand in industry for a method for uniformly winding a ring-shaped magnetic material that cannot be disassembled quickly, inexpensively, and uniformly.

The object of the present invention is to challenge the limitations of the prior art and to provide a fast, inexpensive, and highly reliable winding method.

FIG. 1 shows a perspective view of an example of a conventional toroidal coil. In the case shown in FIG. 1, a tape 2 is wound around a magnetic core (not shown), and then a conducting wire 1 is wound by hand.

Hereinafter, the present invention will first be explained in detail with reference to Examples.

FIG. 2 is a longitudinal sectional view of the embodiment. 7 on the inner inner wall of the glass case 4 in which the U-shaped conductive wire 3 is embedded.
After inserting the 2-item magnetic core 22 and fitting the plastic lid 5, it is placed on the printed circuit board 8. The end portion 33 of the conductive wire 5 that has passed through the printed circuit board 8 is connected to a conductive wire (not shown) attached to the printed circuit board 8 and a solder 20.
As a result, they are electrically connected to form a coil around which the magnetic core 22 is wound.

Figure 3 shows case 4. FIG. 3 is an exploded perspective view of the magnetic core 22 and the lid 5. FIG.

As shown in FIGS. 2 and 3, the coil according to the present invention has a structure in which a plurality of U-shaped conductive members 3 are arranged at approximately equal intervals and fixed with an insulator 4. magnetic core 22
is inserted and covered with an insulating lid 5, both ends of each of the U-shaped conductive members 3 are connected to the back side of the printed circuit board 8, and adjacent conductive members are electrically connected in series. It has a coil structure of 1':)-.

In this embodiment, soldering was used as the connection method, but other methods such as spot welding are also possible.

In this example, a U-shaped conductive member was used as the conductive member, but conductive members with open conductive paths and various shapes such as a beam or three-shape may also be used. It is clear that it is the equivalent of the letter .

The magnetic core 22 does not need to be made of a material such as a ferrite core, but may be a toroidal core formed by winding a ribbon-shaped metal, such as an amorphous metal core or a permalloy core, or It is clear that it is within the scope of the present invention.

Between the insulator 4.5 and the magnetic core 22, it is also possible to use a silicon-based contact agent or the like as a buffer for the magnetic body 2. I also think that making small holes for ventilation in the insulator 4.5 is effective in suppressing the temperature rise of the magnetic body 2.

As described above using the embodiments of the present invention, the coil having the winding structure according to the present invention is easy to produce;
It can be done in a short time and can be easily automated, making it inexpensive.

In addition, there is less possibility of miscounting the number of turns, and since the conductive member is fixed by an insulator, there is no risk of short circuit between the windings, and it is suitable for applications where distributed capacitance between the windings is important. In this case, since the distribution capacity is less uneven, it is possible to easily realize a uniform product with high quality and high reliability.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a coil according to a conventional winding method, FIG. 2 is a sectional view of a coil device according to the present invention, and FIG. 5 is an assembled perspective view of the coil device according to the present invention. 1: Winding wire, 2: Day 1.3: U-shaped conductive member.

Claims (1)

[Claims] When winding a conductor around a magnetic core multiple times and attaching it to a printed circuit board, the winding method is to wire multiple U-shaped conductive wires at approximately equal intervals, expose both ends, and fix them with an insulator or semi-circuit them. A magnetic core is inserted into the inner hollow part of the fixed magnetic core case, and the conductive wire end exposed outside the insulator is passed through to the back side of the printed circuit board and placed. . A coil device, wherein the plurality of conductive members are conductively connected in series via lead wires arranged on the back surface of a printed circuit board.