JPH0773935A - Contact pin with noise filter and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a contact pin in order to obtain a connector with noise filter which has a high mounting density. CONSTITUTION:On the outer periphery of a conductor 2, the first reactance element 3 is formed by insert-molding with a magnetic synthetic resin. On the first reactance element 3, a penetration capacitor 4 to be the second reactance element is fitted, and the outer side electrode 4b of the penetration capacitor 4 is connected to a common electrode of a base 1, while the inner electrode 4a of the penetration capacitor 4 is soldered 6 to the conductor 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact pin having a reactance element for an L-type, C-type or LC-type noise filter, which is mainly used at the end of a connecting cable in electronic equipment, and a method for manufacturing the contact pin. .

[0002]

2. Description of the Related Art Conventionally, in electronic equipment, in order to remove noise mixed in from the line of the cable, at the connection terminal portion of the cable connecting the electronic equipment to each other,
An inductive (L-type) filter, a capacitive (C-type) filter, and a mixed type (LC-type) filter thereof are provided for each line.

[0003]

If a capacitor, a coil or a reactor (using ferrite beads) for this filter is provided on the wiring board side of an electronic device,
Since these parts, which are the same as or twice the number of lines of the cable, are concentrated around the connection terminals, the packaging density of the wiring board is reduced.

[0004]

The present invention solves the above-mentioned problems as follows. By providing a reactance element in the middle of the conductor portion having one of the male and female contacts at one end and the conductor connecting portion at the other end.

Further, a reactance element made of a magnetic synthetic resin material is insert-molded in the middle of a conductor portion having one of male and female contacts at one end and a conductor connecting portion at the other end.

[0006]

According to the present invention, the reactance element is provided between the contact of the conductor portion and the conductor connecting portion, and the outside of the reactance element is inserted into the substrate of the fixing portion and fixed, whereby the mounting density can be improved. A connector with a very high L-type, C-type, or LC-type noise filter is formed.

[0007]

Embodiments (a) and (b) of FIG. 1 show a first embodiment of the present invention. (1) is a plurality of contact pins (A)
Is a connecting plate for connecting to form a multi-core connector. The contact pin (A) has a conductor portion (2) provided with a female or male contact (2a) at one end and a conductor connecting portion (2b) at the other end.

In the conductor portion (2A) of the first embodiment shown in FIG. 1, the contact (2a) at the tip is a male rod-shaped contact having a rounded end, and the conductor connecting portion (2b) at the rear end. ) Is a round bar with a conductor wire connection hole (2c) drilled in the axial direction in the rear part and the shaft diameter is the same as the contact (2a), and moreover, between the contact (2a) and the conductor wire connection portion (2b) In addition, the expanded diameter step portion (2d) is provided. The conductor wire connection hole (2c) is where the core wire of the conductor wire connected to the conductor portion (2A) is soldered. The contact (2a) of the conductor portion (2A) may be a female contactor.

[0009] The diameter-increasing stepped portion (2
A first reactance element (3) made of a magnetic synthetic resin material is insert-molded around the conductor connecting portion (2b) behind the d) so as to have the same diameter as the diameter-increasing step portion (2d).

The magnetic synthetic resin material forming the first reactance element (3) is made of a thermoplastic resin as a binder, which is capable of solidifying a powder magnetic material of high permeability of ferrite type, using a molding die. Then, insert molding is performed by closely adhering to the outside of the wire connecting portion (2b). It should be noted that, although an example different from the first example, a cylindrical member having the same shape as that of the first reactance element (3) is formed in advance from the normally sintered ferrite and the magnetic synthetic resin material described above. , This is the conductor
You may make it insert in the conducting wire connection part (2b) of (2A).

The second reactance element (5) consisting of the feedthrough capacitor (4) is inserted on the first reactance element (3) thus prepared. The inner electrode (4) of the through hole of the feedthrough capacitor (4) forming the second reactance element (5)
a) is loosely fitted to the outer diameter of the first reactance element (3), and its tip portion is deeply fitted until it reaches the diameter-increasing step portion (2d), and the tip is enlarged. Solder to (2d)
(6) Yes.

In this way, the contact pin (A) with an LC type noise filter of the present invention is completed. As shown in FIG. 1 (b), the contact pin (A) is connected to the common electrode (1a) (usually the ground electrode) of the substrate (1) and the feedthrough capacitor (4) as the second reactance element (5). Outer electrode of (4
b) is soldered (7) and the contact pin (A) is on the board
While being fixed to (1), an LC filter circuit is electrically formed.

That is, in the first reactance element (3), the closed magnetic circuit formed around the axis line around the conductor connecting portion (2b) passing through the core is made of a magnetic material having a high magnetic permeability. It has a cylindrical shape, and like an ordinary penetrating ferrite bead, acts to generate an inductive reactance with respect to the current flowing through the central portion of the axis.

Further, the feedthrough capacitor (4) constituting the second reactance element (5) has an inner electrode (4a) of the feedthrough capacitor (4) connected to the conductor portion (2) and an outside thereof. The electrode (4b) is connected to the common electrode (1a), and the conductor part (2)
It acts to generate a capacitive reactance with respect to the voltage applied to.

FIG. 2 shows a second embodiment in which the conductor portion (2) is a conductor portion (2B) different from the conductor portion (2A) of FIG. In the conductor portion (2B) of the second embodiment, the outer diameter of the conductor wire connecting portion (2b) is the same as that of the enlarged diameter step portion (2) of the first embodiment.
This expanded wire connecting part is formed with the same diameter as d).
At a position slightly rearward of the front end of (2b), the expansion flange (2
d ') is provided.

As the first reactance element (3), as shown in FIG. 2 (a), a separately formed cylindrical element is used.

This first reactance element (3) is shown in FIG.
As shown in (b) of FIG. 7, the conductor portion (2A) is fitted into the conductor wire connecting portion (2b). The outer diameter of this first reactance element (3) is
It is preferable to match the outer diameter of the flange (2d ′) of (2A) or to make it slightly smaller.

Further, as shown in FIG. 2 (c), a feedthrough capacitor (4) is inserted from above the first reactance element (3), and its inner electrode (4a) is connected to the flange () of the conductor portion (2A). 2
Solder (6) to d ').

Also in the second embodiment, the structure shown in (b) can be formed by insert molding with a magnetic synthetic resin material.

In the second embodiment, the diameter of the feedthrough capacitor (4) which is the second reactance element (5) can be increased to increase the capacitive reactance.

FIG. 3 shows a third embodiment of the present invention. In this embodiment, as shown in FIG. 3 (a), the contact (2a) of the conductor portion (2C) and the conductor wire connecting portion (2b) are two separate members, and there is no intermediate portion. In this missing middle part,
A relatively long thin wire (8) is provided at the rear end (8a) of the contact (2a) and at the front end (8b) of the conductor connecting part (2b), respectively, to connect the terminal (2e) of the contact (2a) and the conductor. Soldered to the terminal (2f) at the end (2b).

Next, as shown in (b), from the top of the thin wire (8) connecting the contact (2a) and the conductor wire connecting portion (2b),
The contact (2a) rear end (8
The first with the same diameter as the expanded diameter part (2g) provided in front of the terminal (2e) of a)
The reactance element (3a) is molded by insert molding using a magnetic synthetic resin material.

Thereafter, as shown in (c), the feedthrough capacitor (4) forming the second reactance element (5) is fitted into the first reactance element (3) and the Cover the tip of the feedthrough capacitor (4) to the expanded diameter part (2g) and solder the inner electrode (4a) to the expanded diameter part (2g).
(6) Do.

Although the thin wire (8) is shown as a coil in this embodiment, the shape of the thin wire (8) is not limited to the coil shape because the thin wire (8) does not induce self-induction. The thin wires (8) may be arranged in any shape as long as they are not in contact with each other. In short, if the magnetic synthetic resin material is buried in a high magnetic permeability atmosphere over a relatively long distance, an increase in inductive reactance can be expected.

The above embodiment is an example of the LC type noise filter using both the first and second reactance elements (3) and (5), but the first or second reactance element (3) is used. L-type or C with only one of (5)
Type noise filter.

[0026]

According to the present invention, the L-type, C-type, or L-type having a very high packaging density and a high noise removal efficiency is provided.
A contact pin with a C-type noise filter is obtained.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention, (a) is a side view showing a part of a contact pin in section for explaining a first step of manufacturing a contact pin, and (b) is a second view. FIG. 6 is a side view showing a part in section for explaining the process of FIG.

FIG. 2 is a view showing a second embodiment of the present invention, (a) is a side view showing a first step of manufacturing a contact pin in a partial cross section, and (b) is a second view. FIG. 6C is a side view showing a part in cross section for explaining the step of FIG. 7C, and FIG.

FIG. 3 is a view showing a third embodiment of the present invention, (a) is a side view showing a first step of manufacturing a contact pin, a part of which is shown in section, and (b) is a second view. FIG. 6C is a side view showing a part in cross section for explaining the step of FIG. 7C, and FIG.

[Explanation of symbols]

(1) Connecting plate (1a) Common electrode (2) (2A) (2B) (2C) Conductor part (2a) Contact (2b) Conductor connection part (2c) Conductor connection hole (2d) Expanded step part (2d ' ) Flange (2e) (2f) Terminal (2g) Expanded part (3) First reactance element (4) Feedthrough capacitor (4a) Inner electrode (4b) Outer electrode (5) Second reactance element (6) ( 7) Soldering (8) Fine wire (8a) Rear end (8b) Front end (A) Contact pin

Claims (8)

[Claims] 1. A contact pin with a noise filter, wherein a reactance element is provided in the middle of a conductor portion having one of male and female contacts at one end and a conductor connecting portion at the other end. 2. A conductor portion is divided into a contact and a conductor connecting portion, and a bent conductor connecting both ends thereof is provided between a rear end of the contact and a tip of the conductor connecting portion. The contact pin with a noise filter according to claim 1. 3. The contact pin with a noise filter according to claim 1, wherein the reactance element is a feedthrough capacitor fitted in a conductor wire connection portion of the conductor portion. 4. The contact pin with a noise filter according to claim 1, wherein the reactance element is a high-permeability magnetic material fixed to a conductor connecting portion in the conductor portion. 5. The contact pin with a noise filter according to claim 4, wherein the high-permeability magnetic body is a cylindrical body obtained by sintering a high-permeability ferrite powder material. 6. The contact pin with a noise filter according to claim 4, wherein the high-permeability magnetic substance is a magnetic synthetic resin material obtained by mixing a small amount of synthetic resin material with a high-permeability ferrite powder material. 7. A second reactance element, wherein the reactance element is a first reactance element made of a high-permeability magnetic material fixed to a conductor connecting portion in a conductor part, and a feedthrough capacitor fitted to the first reactance element. The contact pin with a noise filter according to any one of claims 1 to 4, which is an element. 8. A noise characterized in that a reactance element made of a magnetic synthetic resin material is insert-molded in the middle of a conductor portion having one of male and female contacts at one end and a conductor connecting portion at the other end. Method of manufacturing contact pin with filter.