JPH076825A - Connector with capacitor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a connector with a capacitor capable of effectively dropping the noise component superimposed on the ground wire of the cable to the ground on the chassis side. [Constitution] The connector 2 has a signal terminal 2-1 and a ground terminal 2-.
3, the connector 2 is in a state where the ground terminal 2-3 and the chassis 1 are insulated by the insulator 2-9,
It is attached to the chassis 1 with screws 2-8. The ground terminal 2-3 is provided with an extension 2-3 ', and the extension 2
A chip capacitor 3'is attached to a portion of -3 'that faces the chassis 1, and the other terminal of the chip capacitor 3'is electrically connected to the chassis 1. With the above configuration, the noise transmission path between the ground terminal 2-3 and the chassis can be shortened, and the noise component can be effectively dropped to the chassis 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector with a capacitor in which a capacitor is connected between a ground electrode of a connector and a chassis as a noise countermeasure, and particularly, the present invention is to shorten a wiring path between the ground electrode of the connector and the chassis. Thus, the present invention relates to a connector with a capacitor capable of effectively reducing noise superimposed on the ground electrode to the chassis side.

[0002]

2. Description of the Related Art When a cable having a signal line and a ground line is introduced into a housing through a connector, the ground line of the cable is usually connected via a capacitor as a measure against noise superimposed on the ground line of the cable. It is performed by connecting to the chassis of the housing and dropping noise superimposed on the ground wire to the chassis side.

FIG. 2A is a diagram showing the above-mentioned connection relationship. In FIG. 2, FG is the chassis of the housing (frame ground, which is grounded), S is the signal line of the cable, SG is a signal ground wire and C is a capacitor. By connecting the cable ground wire SG and the chassis chassis FG via the capacitor C as shown in the figure, the noise superimposed on the ground wire SG is It is possible to reduce the influence of noise on the circuit in the housing by dropping to the chassis FG of the housing via C.

2 (b) and 2 (c) are views showing a conventional method of connecting a capacitor in a BNC connector, FIG. 2 (b) is a side view of the BNC connector, and FIG. It is the figure seen from the side, and the right half of (b) has shown the sectional view of the BNC connector. 2 (a),
In (b), 1 is a chassis of the housing, 2 is B on the female side.
NC connector 3 is a capacitor.

In the BNC connector 2, 2-1 is a signal terminal to which a signal line is connected, and 2-2 is the signal terminal 2-1.
It is a female-side connecting portion that is electrically connected to and integrally formed with the female-side connecting portion 2-2. The male-side contactor of the cable signal line in the male-side BNC connector (not shown) is connected to the female-side connecting portion 2-2. . 2-3 is a ground terminal, 2-4 is a nut, 2
-5 is a washer, and 2-6 is a ground side connection part of the BNC connector. The ground side contact part 2-6 is connected to a ground side contactor of a male BNC connector (not shown). Further, the ground terminal 2-3 and the ground side connection portion 2-
6 is electrically connected via a washer 2-5 and a nut 2-4.

Further, an insulator 2-10 is provided between the conductor forming the signal terminal 2-1 and the female side connecting portion 2-2 and the conductor forming the earth side connecting portion 2-6. The spaces are electrically isolated. 2-7 is a plate formed of a conductive material, the plate is attached to an insulator 2-9, and the connector 2 is attached to the chassis 1 by a screw 2-8 attached to the plate 2-7. For this reason, the mounting screw 2 is placed between the plate 2-7 and the chassis 1.
It is electrically connected by -8.

Reference numeral 3 denotes a capacitor. One terminal of the capacitor 3 is connected to the ground terminal 2-3, and the other terminal is kept in contact with the ground terminal 2-3 via the lead wire 3a. It is soldered to the plate 2-7 at the portion A in the figure. Two capacitors 3 are attached as shown in FIG. In the figure, the noise component superposed on the grounding side connection portion 2-6 falls to the chassis side through the following path, and reduces the influence of the noise on the circuit in the housing.

Ground side connecting portion 2-6 → capacitor 3 → lead wire 3a → plate 2-7 → mounting screw 2-8 → chassis 1.

[0009]

By the way, in the above-mentioned conventional configuration, the capacitor 3 and the plate 2-7 are connected by the lead wire 3a and are connected to the chassis 1 side through the plate 2-7. However, the noise transmission circuit was lengthened, and due to the inductance, the noise could not be effectively dropped to the chassis 1 side.

The present invention has been made to improve the above-mentioned drawbacks of the prior art. By shortening the noise transmission circuit, the noise component superposed on the ground wire of the cable can be effectively transmitted to the chassis side. It is an object to provide a connector with a capacitor that can be grounded.

[0011]

In order to solve the above problems, the invention of claim 1 of the present invention comprises a signal terminal 2-1 to which a signal line is connected and a ground terminal 2-3 to which a ground line is connected. In the connector 2 attached to the chassis 1 with the chassis 1 and the ground terminal 2-3 electrically insulated, the ground terminal 2-3 is extended so as to face the chassis surface, A chip capacitor 3'is attached between the chassis and the chassis.

According to a second aspect of the present invention, in the first aspect of the invention, the chip capacitor 3'is attached to the ground terminal 2-3 formed of an elastic material, and the elasticity of the ground terminal 2-3 causes the chip It is intended to maintain the electrical connection between the capacitor and the chassis.

[0013]

In the first aspect of the present invention, the ground terminal 2-3 is extended so as to face the chassis surface, and the chip capacitor 3'is provided between the facing ground terminal and the chassis. The noise transmission path between the terminal 2-3 side and the chassis 1 can be shortened, and the noise component superimposed on the ground wire of the cable can be effectively dropped to the ground on the chassis side.

According to a second aspect of the present invention, in the first aspect of the invention, the ground terminal 2-3 is formed of an elastic material, and the elasticity of the ground terminal 2-3 causes an electrical connection between the chip capacitor and the chassis. Since the connection is retained, the same effect as the invention of claim 1 can be obtained, and
When the connector is attached to the housing, the chip capacitor can be attached to the ground terminal 2-3 in advance, so that the chip capacitor can be easily attached to the connector, and the number of assembly steps can be shortened as compared with the conventional method. .

[0015]

FIG. 1 is a diagram showing an embodiment of the present invention. In the figure, the same components as those shown in FIG. 2 are designated by the same reference numerals, 1 is a chassis of the housing, 2 is a BNC connector on the female side, 3'is a chip capacitor, 2-1
Is a signal terminal to which a signal line is connected, 2-2 is a female-side connecting portion, 2-3 is a ground terminal, and the ground terminal 2- of the present embodiment.
3 is made of a springy material, and an extension portion 2-
3'is provided, and the chip capacitor 3'is soldered to the tip portion thereof.

Further, 2-4 is a nut, 2-5 is a washer, 2-6 is a ground side connecting portion, 2-7 is a plate formed of a conductive material, 2-8 is a mounting screw, 2-9, Two
-10 is an insulator. As shown in the figure, in this embodiment, the chip capacitor 3'is soldered to the extension 2-3 'of the ground terminal 2-3 formed of a spring material,
Due to the elasticity of the extension 2-3 'of the ground terminal 2-3,
The capacitor 3'is pressed against the chassis 1 to maintain the electrical contact between the chassis 1 and the chip capacitor.

Therefore, the noise component superposed on the ground side connecting portion 2-6 falls to the chassis side through the following route. Connection part 2-6 on the ground side → extension part 2-3 ′ of the ground terminal 2-3 → chip capacitor 3 ′ → chassis 1. In this embodiment, as described above, the extension portion 2-3 'is provided on the ground terminal 2-3 of the BNC connector, the chip capacitor 3'is soldered, and the elasticity of the extension portion causes the chip capacitor 3'. Since it is in electrical contact with the chassis 1, the noise transmission path can be significantly shortened compared to the conventional example, and the noise component superimposed on the ground wire of the cable can be effectively dropped to the ground on the chassis side. You can In addition, insert a chip into the extension 2-3 'of the ground terminal 2-3.
By soldering the capacitor 3 ′, the chip capacitor can be easily attached when the BNC connector is attached to the housing, so that the number of assembling steps can be shortened as compared with the conventional case.

Although the mounting of the capacitor in the BNC connector has been described in the above embodiment, the present invention is not limited to the above embodiment and can be applied to other connectors.

[0019]

As described above, in the present invention, the ground terminal of the connector is extended so as to face the chassis surface, and the chip capacitor is mounted between the ground terminal and the chassis which face each other. The noise transmission path between the side and the chassis can be shortened, and the noise component superimposed on the ground wire of the cable can be effectively dropped to the ground on the chassis side.

Further, by forming the ground terminal with an elastic material and holding the electrical connection between the chip capacitor and the chassis by the elasticity of the ground terminal, the chip capacitor is preliminarily connected to the ground terminal 2-3 when the connector is attached. Since it is only necessary to attach the chip capacitor to the connector, the chip capacitor can be easily attached to the connector, and the number of assembly steps can be shortened compared to the conventional case.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional example.

[Explanation of symbols]

 1 Chassis 2 Female BNC Connector 3'Chip Capacitor 2-1 Signal Terminal 2-2 Female Side Connection Part 2-3 Ground Terminal 2-4 Nut 2-5 Washer 2-6 Ground Side Connection Part 2-7 Plate 2 -8 Mounting screw 2-9, 2-10 Insulator

Claims (2)

[Claims] 1. A chassis comprising a signal terminal (2-1) to which a signal line is connected and a ground terminal (2-3) to which a ground line is connected.
In the connector (2) attached to the chassis (1) with the (1) and the ground terminal (2-3) electrically insulated, extend the ground terminal (2-3) so that it faces the chassis surface. Then
Chip capacitor between opposing ground terminal and chassis
A connector with a capacitor, which is equipped with (3 '). 2. The chip capacitor (3 ') is attached to the ground terminal (2-3) made of an elastic material, and the elasticity of the ground terminal (2-3) causes a gap between the chip capacitor (3') and the chassis. The connector with a capacitor according to claim 1, which holds an electrical connection.