JPH09245902A - Connector built-in with filter element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform the mounting and connection of a filter element at a low cost and preclude application of stress to the element and its connection part even with varying environmental temp. by connecting the filter element using an anisotropic conductor. SOLUTION: A plurality of contact pins 2 made of a conductive material are implanted in an insulative housing 1. A box-shaped shield case 5 made from metal plate is fitted fast on the periphery of the housing 1. A through type capacitor 3 in a ring shape having electrode surfaces at the top and the bottom is fitted on each contact pin 2 and is resiliently contacted and connected between the middle step part 2A of the contact pin 2 and the shield case 5 by an anisotropic conductor 4 having resilience.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a built-in filter element for preventing noise, which is mounted on an external connection portion of an electronic device and suppresses intrusion of noise from the outside and radiation of noise generated inside the device. The present invention relates to a filter element built-in connector.

[0002]

2. Description of the Related Art Heretofore, as a connector having a built-in filter element of this type, one having a feed-through capacitor having an excellent noise removing performance as a filter element has been widely used. It is described in Japanese Patent No. 35427.

FIG. 5, FIG. 6 and FIG. 7 show the construction of the filter element built-in connector, and FIG.
Is an exploded perspective view, and FIG. 7 is a cross-sectional view of the main part.

In FIG. 1, reference numeral 11 denotes an insulating housing made of molded resin, and a contact pin 12 made of a metal material is penetratingly held by a base portion 11A of the insulating housing.

A ground plate 13 made of a metal plate has a hole 13A through which the contact pin 12 does not come into contact, and is mounted on the upper surface of the base 11A of the insulating housing 11 so as not to come into contact with the contact pin 12. .

Further, an annular through-type capacitor 14 having independent electrode layers 14A and 14B on the upper and lower surfaces is fitted in each contact pin 12, and a central through hole 14 on the upper surface thereof.
The electrode layer 14A formed with an insulation interval from the periphery of C to the outer periphery is used as the contact pin 12, and the central through hole 14 on the lower surface
The electrode layers 14B formed up to the outer periphery with a constant insulation interval around C are soldered and fixed to the ground plate 13 respectively.

The electrode layer 14A of the feedthrough capacitor 14
As shown in FIG. 7, the electrode layer 14A on the upper surface is connected to the contact pin 15 by the solder fillet 15A obtained by melting the ring solder 15, and the electrode layer 14B on the lower surface is connected to the surface of the ground plate as shown in FIG. The thicker solder plated layer 13B is melted and connected.

Further, the insulating housing 11 is covered with a shield case 16 made of a metal plate from above the ground plate 13, and the bottom surface thereof has a hole 16A for penetrating the contact pin 12 in a non-contact manner and a connection terminal of the ground plate 13. It has a hole 16B for soldering through the portion 13C and is fixed to the insulating housing 11 by locking claws 16C on both side surfaces.

[0009]

However, in the above-described conventional connector with a built-in filter element, it is very difficult to connect the feed-through capacitor 14 as a filter element by soldering, and it takes a lot of time and labor, so that the manufacturing cost is high. In addition, there is a problem in that when the environmental temperature during the use of the connector changes significantly, stress is applied to the feedthrough capacitor 14 and the solder fillet 15A due to the difference in thermal expansion of the components, which may cause damage in extreme cases. It was

The present invention solves the above-mentioned problems of the prior art. The filter element can be easily mounted and connected at low cost, and the filter element and its connecting portion can be attached even if the environmental temperature during use changes. An object of the present invention is to provide a connector with a built-in filter element that is free from stress.

[0011]

In order to solve the above-mentioned problems, the present invention reduces the number of constituent parts by using an anisotropic conductor as an electric connecting means of a feedthrough capacitor which is a filter element. At the same time, all the components can be assembled from one direction.

According to the present invention, it is possible to obtain a connector having a built-in filter element, which has excellent noise elimination performance by a feedthrough capacitor, can be manufactured at low cost, and is resistant to heat stress.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an insulating housing in which a plurality of contact pins made of a conductor are implanted, and a metal plate box capped and fixed to the outer periphery of the insulating housing. Type shield case, a plurality of through-type filter elements having upper and lower electrode surfaces, and an elastic anisotropic conductor elastically connecting the upper and lower electrode surfaces of each filter element between each contact pin and the shield case. The filter element does not require time-consuming soldering for electrical connection, so assembly work is easy and stress is applied to the filter element even if the ambient temperature during use changes. Has the effect that there is no

According to a second aspect of the invention, in the first aspect of the invention, a plurality of ring-shaped through-type filter elements are fitted to a plurality of contact pins having an intermediate step portion, and one of the electrode surfaces thereof is attached. Is contacted with the intermediate step of each contact pin, and an anisotropic anisotropic conductor is sandwiched between the inner surface of the shield case and the other electrode surface of the filter element to hold the contact pin. All the other components can be incorporated into the insulated housing from one direction.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 show the structure of a filter element built-in connector according to the embodiment, FIG. 1 is a sectional view, and FIG. 2 is an exploded perspective view.
1 is an insulating housing made of molded resin, and its base 1A
The contact pin 2 made of a metal material is pierced and held in the same manner as in the conventional example, but the contact pin 2 has an intermediate step portion 2A that abuts the step portion of the base portion 1A.

Reference numeral 3 denotes an annular feedthrough capacitor similar to the conventional example, but as shown in FIG. 3, the electrode layer 3A on the upper surface of the feedthrough capacitor 3A has a certain insulating space around the central through hole 3C. The electrode layer 3B on the lower surface is formed up to the outer periphery, and is partially or entirely formed from the periphery of the central through hole 3C toward the outer periphery.

As shown in FIGS. 1 and 2, the ring-shaped feedthrough capacitor 3 is mounted by fitting the central hole 3C into the contact pin 2 and the electrode layer 3B on the lower surface thereof in the intermediate stage of the contact pin 2. It abuts / contacts the portion 2A.

Further, 4 is an anisotropic conductive material having elasticity, and as shown in the sectional view of FIG. 4, a vertical direction between upper and lower surfaces of an elastic plate-like insulator 4A such as silicon rubber. In addition, a large number of ultrafine pins 4B made of an electric conductor are arranged with a slight insulation distance from each other, and the tips of the respective ultrafine pins 4B are slightly projected from the upper and lower surfaces. A through hole 4 slightly larger than the outer diameter of the contact pin 2 provided between the upper and lower surfaces of the contact pin 2 according to the arrangement pitch of the plurality of contact pins 2 held by the base 1A.
By fitting the contact pin 2 into C, it is mounted above the feedthrough capacitor 3.

Numeral 5 is a shield case made of a metal plate, and has a plurality of holes 5B on the bottom surface 5A thereof which are slightly larger than the outer diameter of the contact pin 2 and has the above-mentioned elastic anisotropy. When the contact pin 2 penetrates the hole 5B of the bottom surface 5A in a non-contact manner by being attached to the insulating housing 1 from above the conductor 4, the anisotropic conductor 4 is pressed on the inner surface of the bottom surface 5A. It is fixed to the insulating housing 1 by the surface claws 5C.

As a result, the elastic conductor 4 is compressed by being sandwiched between the stepped portion 2A of the contact pin 2 and the inner surface of the bottom surface 5A of the shield case 5 through the feedthrough capacitor 3 and its elastic force. Depending on the nature, the tips of the ultrafine pins 4B on the upper and lower surfaces contact the electrode surface 3A on the upper surface of the feedthrough capacitor 3 and the inner surface of the bottom surface 5A of the shield case 5 to make them conductive, thereby making the feedthrough capacitor 3 contact pin 2 and the shield case. It is connected between 5.

In the above description, the case where the anisotropic conductor 4 is in the form of an integral plate has been described, but this can be similarly performed even if the anisotropic conductor 4 is individually divided according to the number of the feedthrough capacitors 3. Is.

In addition, the anisotropic conductor 4 is formed by alternately arranging an insulator portion and a conductor portion in the pitch direction, and the conductor portion is formed by mixing carbon particles or metal powder. It is possible to use a structure capable of conducting only in the same direction by pressing from below, and any one may be used as long as it has low contact resistance and conductor resistance.

[0023]

As described above, according to the present invention, the number of constituent parts can be reduced by connecting the filter elements using the anisotropic conductor, and all the parts can be easily made from one direction. Since it can be incorporated, it is extremely productive.

Further, even if the temperature of the environment in which the connector is used is changed, stress is not applied to the filter element and its connecting portion due to the difference in thermal expansion, so that the quality is stable.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a filter element built-in connector according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a sectional view of a feedthrough capacitor used in the connector.

FIG. 4 is a sectional view of an essential part of an anisotropic conductor used for the connector.

FIG. 5 is a sectional view of a conventional connector with a built-in filter element.

FIG. 6 is an exploded perspective view of the same.

FIG. 7 is a cross-sectional view of a main part of a through-type capacitor mounting part used for the connector.

[Explanation of symbols]

 1 Insulation Housing 1A Base 2 Contact Pin 2A Intermediate Step 3 Through Capacitor 3A Top Electrode Layer 3B Bottom Electrode Layer 3C Central Through Hole 4 Anisotropic Conductor 4A Insulator 4B Extra Fine Pin 4C Through Hole 5 Shield Case 5A Bottom 5B hole 5C nail

Claims (2)

[Claims] 1. An insulating housing in which a plurality of contact pins made of a conductor are planted, a box-shaped shield case made of a metal plate fixed to the outer periphery of the insulating housing by caps, and a plurality of upper and lower electrode surfaces. A filter element built-in connector including a through-type filter element and an anisotropic anisotropic conductor that elastically connects the upper and lower electrode surfaces of each filter element between each contact pin and the shield case. 2. A plurality of annular through-type filter elements are fitted to a plurality of contact pins having an intermediate step portion, one electrode surface of which is brought into contact with an intermediate step portion of each contact pin, and a shield is provided. The filter element built-in connector according to claim 1, wherein an anisotropic conductive material having elasticity is sandwiched between the inner surface of the case and the other electrode surface of the filter element.