JPH0888054A - Connector - Google Patents

Abstract

PURPOSE: To accomplish a small size of a printed wiring substrate, and a space saving, by housing a filter element and a resistor for electrostatic surging countermeasure, in a connector in a compact form. CONSTITUTION: A connector is composed of a pin holding plate 1, plural connector pins 10, plural varistors 20, and shield shells 25 and 26. Each connector pin 10 is composed of the first connection 11, the second connection 12, and a resistor 13 consisting of a resistant resin member connecting both connections 11 and 12 mechanically and electrically. Each varistor 20 has a cylindrical form, and is installed to the first connection 11 of the connector pin 10, and an inner periphery electrode is connected to the first connection 11, while an outer periphery electrode is connected to the shield shell 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector, and more particularly to a connector used as an interface for electronic equipment.

[0002]

2. Description of the Related Art Generally, a driver IC or the like built in an electronic device receives a signal from an external device through a connector, but there is a possibility that the driver IC may be destroyed by static electricity entering from the connector. ing. Therefore,
Conventionally, a varistor and a resistor are installed between each connector pin of the connector and the driver IC in order to prevent an electrostatic surge from entering from the connector. However, installing a varistor or a resistor on a printed wiring board incorporating a driver IC or the like occupies space on the board, which is an obstacle to downsizing of the board and high-density mounting. Regarding varistor, there are cylindrical ones like feedthrough capacitors.
By mounting this cylindrical varistor on the connector pin, space saving can be achieved for the varistor. However, there is no effective space-saving measure for the resistor. Depending on the surge voltage that flows in, a capacitor may be used in combination with the resistor instead of the varistor.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a connector which can compactly occupy a space and save a printed wiring board by compactly accommodating a filter element and a resistor for electrostatic surge protection. To provide.

In order to achieve the above object, in the connector according to the present invention, the connector pin is divided into a first connecting portion and a second connecting portion, both of which are connected in series via a resistor, and The filter element was attached to the first or second connection portion of the connector pin. The connector pin is fixed through the supporting member made of an insulating material. One electrode of the filter element is connected to the connector pin, and the other electrode is connected to the shield shell that covers the pin support member.

In the above structure, the resistor body is integrated with the connector pin and is inserted in series in the signal transmission line to function as a resistance component. The filter element is connected in parallel with the signal transmission line to drop a large current to the ground. According to the present invention, since the filter element and the resistance body for the electrostatic surge countermeasure are compactly housed in the connector, it is not necessary to mount the filter element and the resistance body on the printed wiring board incorporating the driver IC and the like, and the size of the board is reduced. It greatly contributes to space saving.

[0006]

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

In FIG. 1, the connector comprises a pin support plate 1, a plurality of connector pins 10, a varistor 20, a front shield shell 25, and a rear shield shell 26. The pin support plate 1 is integrally molded in a plate shape with an insulating resin material and has a plurality of through holes 2.

The connector pin 10 is formed by punching a conductive metal plate material (hoop material) into a predetermined shape, and has a first connecting portion 11 and a second connecting portion 12 and a resistor for mechanically and electrically connecting them. 13 and 13. As shown in FIG. 2, the connector pin 10 includes a first connection portion 11 punched out by press working and a second connection portion 12 punched out so as to be connected to the hoop material 15 by the arm portion 16, not shown. It is obtained by inserting the mold into a mold, filling the mold with a resistive resin material, and molding the resistor 13 across the ends of the first and second connecting portions 11 and 12. The resistive resin material is a resin such as epoxy or silicon mixed with conductive particles such as carbon, stainless steel, or aluminum. The kind and / or mixing ratio of the conductive particles are adjusted to obtain a predetermined resistance value. ing. Further, as shown in FIG. 3, recesses 11a and 12a are formed at the ends of the connecting portions 11 and 12, respectively, to enhance the coupling force with the resistor 13. In the state shown in FIG. 2, the connector pins 10 are individually made into individual connector pins 10 by pressing the first connecting portions 11 into the through holes 2 of the pin support plate 1 and cutting the arm portions 16.

The varistor 20 has a cylindrical shape, and electrodes (not shown) are formed on the inner peripheral surface and the outer peripheral surface thereof. The varistor 20 is attached to the connector pin 10 from above in FIG. 1 while being fitted in the hole 27 of the rear shield shell 26. On the other hand, the front shield shell 25 is mounted from below the pin support plate 1 so as to surround the first connecting portion 11, and is integrated with the rear shield shell 26. In addition, the varistor 2
The inner peripheral electrode of 0 is soldered to the first connecting portion 11, and the outer peripheral electrode is soldered to the rear shield shell 26.

The connector having the above structure constitutes the circuit shown in FIG. That is, the resistor 13 is inserted in series between the first connecting portion 11 and the second connecting portion 12, and the first connecting portion 11 is grounded via the varistor 20. This connector is mounted on a printed wiring board together with a driver IC of an electronic device, a signal cable pulled out from an external device is connected to the first connecting portion 11, and a driver IC is connected to the second connecting portion 12. .

According to this embodiment, since the resistor 13 is inserted in the intermediate portion of the connector pin 10 and the cylindrical varistor 20 is attached to the outer peripheral portion of the connector pin 10, electrostatic surges can enter through the connector. Of course, it is not necessary to separately mount a resistor or a varistor on the printed wiring board, and it is possible to reduce the size of the board and save space.

Further, since the resistor 13 is made of a resistive resin material in which conductive particles are mixed in the resin, the linear connector pin 10 can be easily obtained by insert molding, and the step of assembling into the support plate 1 can be performed. Can be treated in the same manner as conventional products.

The connector according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the gist thereof. For example, the resistor 13 is preferably insert-molded with a resistive resin material between the first connecting portion 11 and the second connecting portion 12 in the manufacturing process, but a resistor other than the resistive resin material is used. May be.

Further, the pin support plate 1 may be constructed as a housing that surrounds the first connection portion 11 of the connector pin 10. Furthermore, the connector pin 10 may be attached to the pin support plate 1 by insert molding. Further, in the above-described embodiment, the one in which the cylindrical varistor 20 is attached to each connector pin 10 is shown, but the present invention is not limited to this, and for example, a block type in which a plurality of varistor elements are configured on a plate-shaped substrate May be installed as long as it is installed in the shield shell.

In addition to the varistor 20 as the filter element, a capacitor having an appropriate rating may be used in combination with a resistor depending on the surge voltage.

[Brief description of drawings]

FIG. 1 is a sectional view showing a connector which is an embodiment of the present invention.

FIG. 2 is a front view showing a form of a connector pin used in the connector during manufacture.

FIG. 3 is a sectional view showing a main part of the connector pin.

FIG. 4 is an equivalent circuit diagram of the connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pin support plate 10 ... Connector pin 11 ... 1st connection part 12 ... 2nd connection part 13 ... Resistor 20 ... Varistor 25 ... Shield shell

Claims (3)

[Claims] 1. A connector characterized by the following requirements: a pin supporting member made of an insulator; a plurality of connector pins penetratingly fixed to the pin supporting member; the pins being a first connecting portion and a second connecting portion. Section and a resistor connecting both of them in series; a shield shell covering the pin support member; a filter element located in the shield shell; one electrode of the filter element is connected to a connector pin. The other electrode is connected to the shield shell. 2. The connector according to claim 1, wherein the resistor is made of a resistive resin material in which conductive particles are mixed in a resin. 3. The connector according to claim 2, wherein the resistor is fixed between the first connecting portion and the second connecting portion by insert molding.