JPH0745454A - Coil component - Google Patents

Abstract

PURPOSE:To obtain a thin miniature coil component for transformer being employed in various video equipment and industrial apparatus by fixing a coil of a conductor applied with a plurality of insulation layers to a printed board at a position corresponding to the coil part thereof. CONSTITUTION:A printed board 13 having a coil part 13a is coupled with a coil 12 of a conductor applied with a plurality of insulation layers thus obtaining a thin miniature transformer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component used in various video equipment, industrial equipment and the like.

[0002]

2. Description of the Related Art In recent years, the frequency of coil components has been increasing toward miniaturization, and the ferrite core, which is the magnetic core, has been able to obtain performance suitable for the operating frequency. Since the winding resistance increases due to the eddy current, the temperature rise of the coil portion is increasing. Therefore, in order to reduce the high frequency loss, the temperature rise is reduced by using a print coil in the coil portion.

A conventional coil component will be described below. FIG. 8 shows a perspective view of a conventional coil component. In FIG. 8, 1 is an EE-type or EI-type magnetic core, 2 is a coil made of a conductor foil, 3 is a drawing portion pulled out from the coil 2, and 4 is a substrate.

The structure of the coil component constructed as described above will be described below. First, several layers of the coil 2 formed on the substrate 4 are laminated to form a coil portion, and finally the magnetic core 1 is incorporated into the coil portion to form a coil component.

[0005]

However, in the above-mentioned conventional configuration, the space and the creepage distance which must be ensured between the primary winding and the secondary winding and between the winding and the magnetic core in terms of safety standards are It becomes difficult to realize miniaturization because it is necessary, and there is a problem that cost rises because special processing such as completely sealing the end surface of the coil part is required for miniaturization. Was there.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a coil component having a structure capable of reducing the space creeping distance required for safety standards.

[0007]

In order to solve this problem, a coil component of the present invention is a winding formed by winding a conductor having a single or plural insulating layers on a printed circuit board having a coil portion formed on at least one surface. Is mounted so as to correspond to the coil portion of the printed circuit board, and the coil portion and the winding are provided with a magnetic body serving as a magnetic core.

[0008]

With this configuration, the space creeping distance required for safety standards can be reduced, and the cost can be reduced.

[0009]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a coil component of the present invention, FIG. 2 is a perspective view of a coil portion formed of a plurality of insulating layers of a coil component used in the present invention, and FIG. 3 is a print in which the coil portion is formed. It is a perspective view of a substrate. Figure 1
In FIG. 3, 11 is a magnetic core made of EE type or EI type ferrite, 12 is a coil formed by winding a conductive wire having a plurality of insulating layers, and 13 is a printed circuit board having a coil portion 13a on one side.

The coil component configured as described above will be described below. First, according to this embodiment, the conducting wire 12 having a plurality of insulating layers is spirally wound to form a coil, which is used as a primary winding or a secondary winding. Next, the printed circuit board 13 on which the coil portion 13a having the spirally printed conductive pattern is formed is used as the winding on the other side to form the coil 12 described above.
Is connected to the printed circuit board 13 to form a sheet-shaped coil portion. As a result, a thin flat coil portion can be obtained, and the total thickness of the coil component can be reduced even when several layers are laminated. When reinforced insulation is provided between the primary winding and the secondary winding by the insulating layer, the winding 12 and the magnetic core 11 are formed between the windings and between the coils 12 made of a conductive wire having a plurality of insulating layers. The space and creepage distance can be reduced, so the size can be reduced.

(Second Embodiment) A second embodiment of the present invention will be described below. FIG. 4 is a front sectional view of a coil component showing the second embodiment. In FIG. 4, reference numeral 12 denotes a coil in which a conductive wire having a plurality of insulating layers is wound, and reference numeral 13 denotes a printed circuit board having coil portions 13a made of a spiral conductive pattern formed on both surfaces. 3 is different from FIG. 3 in that a coil 12 of a conductive wire having a plurality of insulating layers formed on both surfaces of a printed circuit board 13 is arranged and coupled in a predetermined shape to form a sheet-shaped coil.

As described above, the number of steps can be reduced when a plurality of layers are laminated by arranging and coupling the coil 12 made of a conductive wire having a plurality of insulating layers formed on both surfaces of the printed circuit board 13 in a predetermined shape.

(Embodiment 3) A third embodiment of the present invention will be described below. FIG. 5 is a front sectional view of a coil component showing the third embodiment. In FIG. 5, reference numeral 12 denotes a coil formed by winding a conductive wire having a plurality of insulating layers formed thereon, and 13 denotes a printed circuit board having coil portions 13a having a spiral conductive pattern formed on both surfaces. 4 is different from FIG. 4 in that a printed-circuit board 13 is arranged and joined to both surfaces of a coil 12 made of a conductive wire having a plurality of insulating layers to form a sheet-shaped coil.

As described above, the strength of the coil portion can be improved by arranging and coupling the printed circuit boards 13 on both sides of the coil 12 made of the conductive wire on which a plurality of insulating layers are formed.

(Fourth Embodiment) A fourth embodiment of the present invention will be described below. FIG. 6 is a perspective view of a coil component showing the fourth embodiment. In FIG. 6, 12 is a coil formed by winding a conductive wire having a plurality of insulating layers, 13 is a printed circuit board having a coil portion 13a formed of a spiral conductive pattern on one surface, 14 is a lead terminal portion, and the above is the same as in FIG. ,
It is similar to FIGS. 4 and 5. The difference from the configurations of FIGS. 1, 4 and 5 is that the wiring terminal portion 15 is provided on the printed circuit board 13.
That is the point.

As described above, the wiring terminal portion 15 is provided on the printed board 13, and the lead-out terminal portion 14 of the coil 12 made of a conductive wire formed on the printed board 13 and having a plurality of insulating layers is formed on the wiring terminal portion 15. By connecting, the lead terminal portion 14 can be stabilized, and stable connection can be achieved even when mounting.

(Fifth Embodiment) A fifth embodiment of the present invention will be described below. FIG. 7 is a front sectional view of a coil component showing the fifth embodiment. In FIG. 7, 12 is a coil made of a conductive wire having a plurality of insulating layers, 13 is a printed circuit board having coil portions 13a on both sides, and the above is the same as in FIGS. 1, 4 and 5. 1, 4, and 5
The configuration is different from that of (1) in that a coil 12 made of a conductive wire having a plurality of insulating layers and a printed board 13 are fixed by a fixing piece 16.

As described above, by fixing the coil 12 made of a conductive wire on which a plurality of insulating layers are formed and the printed board 13 with the fixing piece 16, the mechanical fixing can be achieved without fixing by adhesion. Therefore, it is possible to reduce the number of steps since the curing time for adhesion is unnecessary.

[0019]

As described above, according to the present invention, the thickness of the whole coil component can be reduced even when a thin flat coil is obtained and several layers are laminated, and the primary winding and the secondary winding are formed by a plurality of insulating layers. When reinforced insulation is provided between the windings and the windings, a space between the windings and between the windings formed with a plurality of insulating layers and the magnetic core and a creepage distance are not required, so that the size can be reduced. In addition, by providing a wiring terminal on the printed circuit board, the drawer terminal can be stabilized and stable connection is possible even when mounting.
If the coil is fixed by the fixing piece, a coil component that can reduce the number of steps can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view of a coil component showing an embodiment of the present invention.

FIG. 2 is a perspective view of a coil showing the same embodiment.

FIG. 3 is a perspective view of a printed circuit board on which a coil portion according to the embodiment is formed.

FIG. 4 is a front sectional view of a coil component according to the second embodiment.

FIG. 5 is a front sectional view of a coil component according to the third embodiment.

FIG. 6 is a perspective view of a coil component according to the fourth embodiment.

FIG. 7 is a front sectional view of a coil component according to the fifth embodiment.

FIG. 8 is a perspective view of a conventional coil component.

[Explanation of symbols]

 11 Magnetic Core 12 Coil made of Conductive Wire Forming Multiple Insulating Layers 13 Printed Circuit Board 13a Coil Part 14 Lead-out Terminal Part 15 Wiring Terminal Part 16 Fixing Piece

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Soukei Sato 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A printed circuit board having a coil portion formed on at least one surface thereof, and a coil formed by winding a conductive wire having one or more insulating layers formed thereon is attached so as to correspond to the coil portion of the printed circuit board. A coil component in which a magnetic material serving as a magnetic core is provided. 2. The coil component according to claim 1, wherein a wiring terminal portion is provided on the printed board. 3. The coil component according to claim 1, wherein the coil arranged on the printed circuit board is fixed by a fixing piece.