JP2001185303A - Electronics and connector for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic component which is reduced with curtailed spurious radiation and a low-cost yet easy-to-assemble connector capable of realizing it. SOLUTION: A signal pin to be connected with a core wire of a coaxial cable, a GND pin to be connected with an outer conductor of above coaxial cable, and a holding member and a metal member to hold the above signal pin and the above GNC pin are provided, with the signal pin arranged inside the GND pin by setting a step at the signal pin position of the holding member and the metal member is electrically connected with the GND pin. The GND pin, housed in the metal member, is directly connected, so an inductance is lowered at the GND pin part, and potential difference occurring in the GND pin is lowered so that a low-cost and easy-to assemble connector is realized, giving birth ton electronic equipment with low spurious radiation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device in which unnecessary radiation from a plurality of coaxial cables is reduced and a connector for realizing the electronic device.

[0002]

2. Description of the Related Art At present, regulations on unnecessary electromagnetic waves radiated from devices are applied to various devices. With the recent increase in the speed and density of electronic devices, the noise level inside the devices has been increasing. Therefore, there is a need for a technique for suppressing these at low cost.

[0003]

SUMMARY OF THE INVENTION Through research and development to date, we have clarified that it is important to take measures against what is generated from connectors in order to reduce unnecessary radiation from electrical equipment. .

That is, when a signal current flows, a potential difference is generated at the GND pin due to the inductance of the GND pin portion of the connector. The potential difference drives the outer conductor of the coaxial cable, causing a current to flow through the outer conductor of the coaxial cable, which is supposed to be a shield, and generating unnecessary radiation.

As a conventional example of a connector to which a plurality of coaxial cables can be connected among coaxial cables used in electronic equipment, there is a connector as shown in FIG. FIG. 8 shows an enlarged view of the connector pedestal.

In the connectors shown in FIGS. 7 and 8, the connector pins have a parallel two-wire structure in order to increase the degree of integration and the efficiency of assembly work.

[0007] However, the parallel two-line portion is a source of unnecessary radiation generated from the electronic equipment. That is, since the parallel two-line portion has a large inductance, when a signal current flows, a potential difference is generated at the GND pin due to the inductance of the connector GND pin portion. The outer conductor of the coaxial cable is driven by this potential difference, and a current flows through the outer conductor of the coaxial cable, which is supposed to be a shield, thereby generating unnecessary radiation.

For example, Japanese Unexamined Patent Publication No. 7-94245 discloses a connector for coaxial and / or biaxial cable.
It has a housing made of an insulating material for housing signals and a ground connector and an outer conductor for housing the housing, and does not consider low EMI.

Japanese Patent Application Laid-Open No. H11-74037 discloses a multi-core electrical connector cable assembly in which EMI measures are taken into consideration. The multi-core electrical connector cable assembly requires an SCI connector for each coaxial cable. The SCI connector is housed in a metal shell, and a conductive elastic member is sandwiched between the outer conductor of the coaxial cable and the metal outer housing of the SCI connector and the metal shell, which is not easy to assemble. There was a problem.

An object of the present invention is to solve the above-mentioned problems and to provide an electronic component in which unnecessary radiation is reduced, and to provide a low-cost and easy-to-assemble connector for realizing the electronic component.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal member in a connector portion of a coaxial cable of an electronic device and directly connect the metal member to a GND pin to reduce a potential difference generated in the GND pin. This is achieved by housing with members.

That is, since a metal member generally has a smaller inductance than a connector pin, by directly connecting the metal member to the connector pin, a small inductance is connected in parallel to the GND pin.
The inductance at the ND pin portion is reduced, the potential difference generated at the GND pin is reduced, and the above object is achieved.

In order to realize a low-EMI connector which is low in cost and easy to assemble, a step is provided on the connector pin pedestal, and the housing is covered with a metal member, or the shape of the metal member is devised. Attach an insulator to the like.

More specifically, a signal pin to which a core wire of a coaxial cable is connected, a GND pin to which an outer conductor of the coaxial cable is connected, a holding member for holding the signal pin and the GND pin, and a metal member The metal member and the GN
A connector configured to electrically connect D pins, wherein a step is provided at a position of a signal pin of the holding member, and the signal pin is arranged inside the GND pin.

A signal pin to which the core of the coaxial cable is connected and a GND to which the outer conductor of the coaxial cable is connected
A connector comprising: a pin; a holding member that holds the signal pin and the GND pin; and a metal member, wherein the connector is configured to electrically connect the metal member and the GND pin. Has a depression at the connection part.

A signal pin to which a core of the coaxial cable is connected, and a GND to which an outer conductor of the coaxial cable is connected.
A connector comprising a pin, a holding member for holding the signal pin and the GND pin, and a metal member, wherein the connector is configured to electrically connect the metal member and the GND pin, and the metal member or the coaxial cable is provided. An insulator is attached on the core wire of the above.

Also, a signal pin to which the core of the coaxial cable is connected and a GND to which the outer conductor of the coaxial cable is connected
A connector comprising: a pin; a holding member for holding the signal pin and the GND pin; and a metal member, wherein the connector is configured to electrically connect the metal member and the GND pin.
A metal member is provided at a position corresponding to the ND pin.

Further, in the above connector, the metal member has a shell structure surrounding the connector.

In the electronic device, the connector is used.

Also, a circuit board, a coaxial cable electrically connected to the circuit board, a signal pin connecting a core wire of the coaxial cable, and a GN connecting to an outer conductor of the coaxial cable.
The connector having the D pin and a metal member electrically connected to the GND pin.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a coaxial cable connector as a means for reducing unnecessary radiation generated from an electronic device will be specifically described below with reference to the drawings.

FIG. 1 is a schematic view of the connector of the present invention.

The connector of this embodiment has a signal pin 100 to which the core of the coaxial cable is connected and a GND to which the outer conductor is connected.
It comprises a pin 101, a connector pin pedestal 102 as a holding member for holding the signal pin 100 and the GND pin 101, and a metal member 103.

By directly connecting the metal member 103 and the GND pin 101, the inductance of the GND pin portion of the connector can be reduced, and the potential difference generated at the GND pin can be reduced, thereby reducing unnecessary radiation from the connector. Therefore, it is possible to provide an electronic device in which generated unnecessary radiation is reduced.

FIG. 2 is an enlarged view of the connector pin pedestal 102 of FIG. 1, and is an enlarged view of the signal pin 100, the GND pin 101, and the connector pin pedestal 102. The connector pin pedestal 102 of the present embodiment has a structure in which a groove is provided in a portion where the signal pin is connected to the coaxial cable, and the core wire is positioned inside the GND pin when connected to the coaxial cable.

The metal member 103 is made of a conductive metal and has elasticity so that the connector pin pedestal is vertically sandwiched.
It is electrically connected directly to the ND pin 101.

Since the connector pin pedestal 102 has a stepped structure and the signal line pins are connected to the inside of the GND pins, the connection between the metal member 103 and the GND pins can be easily performed, and no particularly precise positioning means is required.

In this embodiment, the shape of the groove of the connector base is rectangular, but the present invention is not limited to the shape of the groove. As shown in FIG. 6, it may be V-shaped, circular, trapezoidal, or the like.

FIG. 3 shows another embodiment of the connector structure.

The connector structure in this embodiment is characterized in that it has a comb-shaped metal member 302. By making the structure of the metal member comb-shaped, the core wire 303 of the coaxial cable 104 is formed.
A gap is created between the metal member 302 and the core wire 303 and the metal member 30.
Keep the insulation of 2.

By forming the metal member 302 in a comb shape, it is not necessary to provide a step on the connector pin pedestal 301, and the connector pin pedestal 301 can have a simple structure.

FIG. 4 shows another embodiment of the connector structure.

The connector structure according to the present embodiment is characterized by having a metal member 401 and an insulator 402. Metal parts
By attaching insulator to 401, coaxial cable 104
Insulation between the core wire 303 and the metal member 401 is maintained.

By attaching the insulator 402 to the metal member 401, both the metal member 401 and the connector pin base 301 can have a simple structure.

In this embodiment, the case where the insulator is attached to the metal member has been described, but the attachment position of the insulator is not limited to this. For example, any structure may be used as long as insulation between the core wire 303 of the coaxial cable 104 and the metal member 302 is maintained by an insulator such as an insulator attached to the core wire.

FIG. 5 shows another embodiment of the connector structure.

The connector structure according to the present embodiment is characterized in that metal members 501 are provided by the number of GND pins.

By electrically connecting the metal member and the GND pin, the inductance of the connector GND pin portion is reduced,
It is possible to reduce a potential difference generated at the GND pin and reduce unnecessary radiation.

By providing a plurality of metal members, there is no need to provide a step on the connector pin pedestal 301, and the connector pin pedestal 301 can have a simple structure.

FIG. 9 shows the measurement results of unnecessary radiation when one coaxial cable is connected to the connector shown in FIG.
In FIG. 9, the dashed line indicates the case where the metal shell is electrically connected to the GND pin, and the solid line indicates the case where the metal shell is not electrically connected. It was confirmed that use of the connector according to the present invention can reduce unnecessary radiation in a frequency range of about 100 MHz to about 1000 MHz.

FIG. 10 shows measurement results of unnecessary radiation when 28 coaxial cables are connected to the connector shown in FIG. In FIG. 10, a dashed line indicates a metal shell and GND.
The case where the pins are electrically connected is shown, and the solid line shows the case where the pins are not electrically connected. By using the connector of the present invention, the frequency can be increased from about 100 MHz to about 100 MHz.
It has been confirmed that unnecessary radiation can be reduced in the range of 0 MHz, and that the effect is particularly large in the range of about 300 MHz to about 800 MHz.

It is needless to say that not only the connector shown in FIG. 5 but also other connectors can provide the same effect.

As described above, by providing a metal member on the connector portion and directly connecting the GND pin to the metal member, the inductance of the connector GND pin portion is reduced, and the potential difference generated at the GND pin is reduced. Thereby, unnecessary radiation from the electronic device can be reduced.

Further, the connector portion, which is a cause of unnecessary radiation generated from the electronic device, has a structure in which a step is provided on the connector pin pedestal, the signal pin is connected to the inside of the GND pin, and the housing is made of a metal member. The metal member and the GND pin can be directly connected, and unnecessary radiation from the connector GND pin can be reduced.

Further, by devising the shape of the metal member, only the GND pin is connected to the metal member, and a connector that can reduce unnecessary radiation by reducing the potential difference generated at the GND pin can be realized at low cost and easy assembly. be able to.

[0046]

According to the present invention, it is possible to provide an electronic component in which unnecessary radiation is reduced, and a low-cost, easy-to-assemble connector for realizing the electronic component.

[Brief description of the drawings]

FIG. 1 is a diagram of a connector according to the present invention.

FIG. 2 is an enlarged view of a connector pin base portion.

FIG. 3 is a diagram showing another connector structure;

FIG. 4 is a diagram showing another connector structure.

FIG. 5 is a diagram showing another connector structure.

FIG. 6 is a sectional view of a connector base.

FIG. 7 shows a conventional connector.

FIG. 8 is an enlarged view of a pedestal part of a conventional connector.

FIG. 9 is a diagram showing measurement results of unnecessary radiation from one coaxial cable.

FIG. 10 is a diagram showing measurement results of unnecessary radiation from 28 coaxial cables.

[Explanation of symbols]

 100 Signal pin 101 GND pin 102 Connector pin base 103 Metal member 104 Coaxial cable 301 Connector pin base 302 Metal member 303 Core wire 304 Outer conductor 401 Metal member 402 Insulator 501 Metal member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // H01R 107: 00 H01R 23/02 K F term (Reference) 5E021 FA05 FB11 FC21 FC32 LA09 5E023 AA04 BB02 BB04 EE03 GG02 GG04 HH07 HH12 HH16 HH17 HH28 5E321 AA01 AA14 BB44 GG01 GG05 GG09

Claims (7)

[Claims] 1. A signal pin to which a core wire of a coaxial cable is connected, a GND pin to which an outer conductor of the coaxial cable is connected, a holding member for holding the signal pin and the GND pin,
A connector configured to electrically connect the metal member and the GND pin, wherein a step is provided at a position of the signal pin of the holding member, and the signal pin is connected to the GND.
A connector characterized by being arranged inside a D pin. 2. A signal pin to which a core wire of a coaxial cable is connected, a GND pin to which an outer conductor of the coaxial cable is connected, a holding member for holding the signal pin and the GND pin,
A connector comprising a metal member, wherein the connector is configured to electrically connect the metal member and the GND pin, wherein the metal member has a recess at a connection portion with the GND pin. 3. A signal pin to which a core wire of a coaxial cable is connected, a GND pin to which an outer conductor of the coaxial cable is connected, a holding member for holding the signal pin and the GND pin,
A connector comprising a metal member and configured to electrically connect the metal member and the GND pin, wherein an insulator is mounted on the core member of the metal member or the coaxial cable. connector. 4. A signal pin to which a core wire of a coaxial cable is connected, a GND pin to which an outer conductor of the coaxial cable is connected, a holding member for holding the signal pin and the GND pin,
A connector comprising a metal member, wherein the connector is configured to electrically connect the metal member and the GND pin.
A connector having a metal member at a position corresponding to a pin. 5. The connector according to claim 1, wherein said metal member has a shell structure surrounding said connector. 6. An electronic device, wherein the connector according to claim 1 is used. 7. A circuit board, a coaxial cable electrically connected to the circuit board, a signal pin connecting a core wire of the coaxial cable, a GND pin connecting to an outer conductor of the coaxial cable, and an electrical connection to the GND pin. An electronic device comprising: the connector according to any one of claims 1 to 6, further comprising: