JP2000299226A - Electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably fix a toroidal core with an elastic force of folded parts by forming folding parts around an insertion opening of a cap part of an insulating resin case and inserting the toroidal core into the cap part while pushing the folding parts down. SOLUTION: First, plate-shaped folding parts 1a are formed around an insertion opening of a cap part 1 of an insulating resin case. The boundary between the folding parts 1a and the cap part 1 is made thick, thus allowing the folding parts to be folded by molding. As a toroidal core 3, a manganese-zinc system ferrite core with high permeability is used for preventing conductive noise. The core 3 is inserted into the cap 1 of the insulating resin case, and then a cover of the insulating resin case is inserted into the cap 1 for their integration. Next, the insulating resin case is provided with a predetermined winding shaft to thereby obtain a choke coil. Therefore, the core 3 can be fixed stably, and an inexpensive electronic component can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic components such as choke coils and inductors used in various electronic devices, and more particularly, to the structure of an insulating resin case for accommodating a toroidal core.

[0002]

2. Description of the Related Art As a component for absorbing noise flowing through an electric wire, a technique of absorbing noise flowing through the electric wire by using a core such as a toroidal ferrite is generally known. In such a noise suppression component, the toroidal core may be subjected to insulation treatment by a method of directly applying insulation coating to the toroidal core or a method of storing the toroidal core in an insulating resin case as shown in FIGS.

[0003] However, in the case of a noise countermeasure component using a toroidal core, there is a problem of protection against impact of the toroidal core and the like.

Conventionally, as shown in FIG. 3, a toroidal core 3 is inserted into a cap portion 11 of an insulating resin case, fixed with an adhesive such as silicone resin, and covered with a lid portion 12 of the insulating resin case. .

Further, as shown in FIG. 4, the insulating resin case is divided into two parts, fitting portions 21a and 22a are provided on both sides, the toroidal core 3 is inserted into the cap part 21 of the insulating resin case, and silicone resin or the like is used. Then, the lid part 22 of the other two insulating resin case divided into two is put in, and integrated using the fitting parts 21a, 22a.

[0006]

However, in the method shown in FIGS. 3 and 4, the thickness of the toroidal core varies, so that an adhesive such as silicone resin must be used and fixed to the insulating resin case. Causes rattling in the insulating resin case, causing rattling noise,
There was a problem that the toroidal core could not be protected from impact.

In the case of such a choke coil or inductor in which such a toroidal core is housed in an insulating resin case and wound, it is not used only for mounting on a substrate.
They are used in various states, and inexpensive ones are required.

An object of the present invention is to solve the above problems and to provide an inexpensive electronic component that can stably fix a toroidal core.

[0009]

The present invention comprises a toroidal core and an insulating resin case for accommodating the toroidal core. In an electronic component wound around the insulating resin case, the insulating resin case has A torsion core comprising a cap portion for storing the toroidal core and a lid portion inserted into the cap portion, wherein a bent portion bent in a direction in which the toroidal core is inserted is provided at an insertion opening of the toroidal core in the cap portion. Electronic components.

That is, according to the present invention, a bent portion is provided in the insertion opening of the cap portion of the insulating resin case, and when the toroidal core is inserted into the cap portion, the bent portion is inserted so as to be pushed in, thereby forming the bent portion. By elastic force,
The toroidal core can be fixed stably.

Further, since the toroidal core can be fixed to the insulating resin case without using an adhesive such as a silicone resin, assembling becomes easy and an inexpensive electronic component can be obtained.

[0012]

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

The insulating resin case used for the choke coil of the present invention comprises a cap and a lid. The material of the insulating resin case is polybutylene terephthalate resin (P
BT) was used. The material of the insulating resin case may be any other material as long as the material has substantially the same insulation, heat resistance, and mechanical strength as PBT. The cap and lid of the insulating resin case were manufactured by injection molding.

FIG. 1 is an explanatory view of a cap portion of an insulating resin case. As shown in FIG. 1, the cap portion 1 of the insulating resin case is provided with a plate-shaped bent portion 1a at an insertion opening. The boundary between the bent portion 1a and the cap portion 1 can be bent by reducing its thickness and molding. Regarding the thickness of the boundary between the bent part and the cap part,
Regarding the elastic force, the thickness may be increased when the elastic force is to be increased, and may be decreased when the elastic force is to be decreased.

FIG. 2 is an explanatory view showing a state where the toroidal core is inserted into the insulating resin case. As shown in FIG. 2, the toroidal core 3 generally uses a ferrite core for measures against conductive noise. The ferrite core used was a manganese / zinc-based material having a high magnetic permeability. When used as an inductor, the present invention is not particularly limited to this.

The toroidal core 3 is inserted into the cap 1 of the insulating resin case, and the lid of the insulating resin case is inserted into the cap 1 to be integrated. Next, a predetermined winding is applied to the insulating resin case to obtain a choke coil.

As described above, the embodiment of the present invention has been described. However, the present invention is not particularly specified as a noise countermeasure component, but can be applied to an inductor using a toroidal core.

[0018]

As described above, according to the present invention,
The toroidal core could be fixed stably, and in addition, an inexpensive electronic component could be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a cap portion of an insulating resin case used for an electronic component of the present invention. FIG. 1A is a plan view. FIG.
(B) is sectional drawing.

FIG. 2 is an explanatory view showing a state in which a toroidal core is inserted into an insulating resin case used for the electronic component of the present invention. FIG.
(A) is a plan view. FIG. 2B is a sectional view.

FIG. 3 is an exploded side view of a conventional electronic component.

FIG. 4 is an exploded side view of another conventional electronic component.

[Explanation of symbols]

 1,11,21 Cap part 1a Bend part 3 Toroidal core 12,22 Lid part 21a, 22a Fitting part

Claims (1)

[Claims] 1. An electronic component comprising a toroidal core and an insulating resin case for housing the toroidal core, wherein the insulating resin case includes:
The toroidal core includes a cap portion for accommodating the toroidal core, and a lid portion inserted into the cap portion. A bent portion bent toward an insertion direction of the toroidal core is formed at an insertion opening of the toroidal core of the cap portion. An electronic component, which is provided.