JPH0519271B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] Regarding the improvement of input/output connectors that electrically connect devices using cables, it is possible to recombine devices connected using different conventional technologies without increasing radiated noise. For the purpose of this, an insulator in which intermediate portions of each of a plurality of signal line contacts and shield line contacts to which the signal line of the cable and its shield line are connected is embedded;
A first projecting piece comprising a frame supporting the insulator and having at least a surface imparted with conductivity, and a grounding plate attached to the insulator, and having fixing means for press-fitting the grounding plate into the insulator. and a second projecting piece that contacts the surface of the frame with spring elasticity, and a third projecting piece that contacts the shield wire contact with spring elasticity, and the insulator is a fixing means for the ground plate. The structure is characterized by forming a recess into which is press-fitted.

[Industrial application field]

The present invention relates to an input/output connector for electrically connecting devices using a cable, and more particularly to an improved connector with a noiseless configuration that eliminates noise radiation and blocks external noise.

Various methods have been proposed in the past to prevent noise from being radiated from the connection and to prevent it from being affected by external noise when connecting a computer and its peripheral devices with a cable using a connector. has been done. However, conventional methods are effective under limited conditions when the combination of connectors and cables to be connected is limited. For example, when connecting a device that uses the first method and a device that uses the second method, radiation noise may occur. With the increase in the number of cases, there has been a demand for improvement.

[Conventional technology]

Conventional methods of connecting devices using coaxial cables while suppressing noise radiation include multi-configurations in which multiple coaxial cables are covered with shielded wires, and multiple coaxial cables without shielded wires. There is a way to use a multi-configuration that bundles together.

FIG. 4 is a schematic diagram for explaining a device connection according to the prior art, and FIG. 5 is a schematic diagram for explaining a device connection according to another conventional technique.

In FIG. 4A, electronic devices A and B are device A
Connector 1 attached to device B, multi-configuration coaxial cable 5 with connectors 2 and 3 on both ends, and device B
Electrical connection is made using the connector 4 attached to the. Connectors 1, 2, with noise countermeasures taken
Reference numerals 3 and 4 house an insulator on which a plurality of contacts are embedded in a frame, and the frame is formed by, for example, nickel plating the surface of a molded body of insulating resin. On the other hand, the coaxial cable 5 is formed by covering a plurality of coaxial cables 6 with a mesh-like shield wire 7.

In FIG. 4B, each coaxial cable 6 covered with a shield wire 7 has a signal wire 8 covered with an insulator 9, and the insulator 9 covered with a net-shaped shield wire 10. Each signal line 8 is connected to the signal source 11 of device A and the load 12 of device B, and each shielded wire 1
0 is the shield wire terminal 13 provided in the device A, and
The shield wire 7 is connected to the frame ground terminal 15 of the device A and the frame ground terminal 15 of the device B via the frames of the connectors 2 and 3 and the ground wire 17 of FIG. 4A.
is connected to the frame ground terminal 16 of the frame.

In FIG. 5A, electronic devices C and D are connected to device C.
Connector 21 attached to , and connectors 22 and 23
A coaxial cable 25 consisting of a plurality of coaxial cables 6 provided at both ends, and a connector 2 attached to the device D.
4 and are electrically connected. The connectors 21, 22, 23, 24 with noise countermeasures are
An insulator having a plurality of contacts embedded therein is housed in a frame, and the frame is formed by, for example, nickel plating the surface of a molded body of insulating resin.

In FIG. 5B, each coaxial cable 6 connects a signal line 8 to a signal source 11 of device C and a load 1 of device D.
2, and the shield wire 10 is connected to the shield wire terminal 13 provided on device C and the shield wire terminal 14 provided on device D, and each shield wire 10 is connected to the ground terminal 15 of device C and the ground terminal 15 of device D. Connect to terminal 16.

[Problem to be solved by the invention]

The above connection of devices A and B and C and D has a radiation noise of about 30 dB and achieves the intended purpose, but if you try to connect devices A and D using coaxial cable 25, for example, However, there was a problem in that the radiation noise from the connection increased by several dB.

Also, devices A and B can be connected using coaxial cable 25.
Or to connect devices C and D, devices A, B,
It is necessary to connect the ground terminals 13 and 14 formed on the circuit boards accommodated in C and D, respectively, to the ground terminals 15 and 16, and a lead wire is required for this connection. Moreover, it could not be said that the connection was made at a sufficiently low impedance due to the inductance of the lead wire, and the effect of suppressing radiation shears was insufficient.

An object of the present invention is to reduce radiation noise from connections between devices and to prevent radiation noise from increasing when devices connected in a different manner are replaced and utilized.

[Means to solve the problem]

According to FIG. 1, the input/output connector according to the present invention is an insulator in which intermediate portions of each of a plurality of signal line contacts 37 and shield line contacts 36 to which signal lines of a coaxial cable and their shield lines are connected are implanted. a frame 32 supporting the insulator 33 and imparting conductivity to at least the surface;
A ground plate 34 is attached to the insulator 33, and the ground plate 34 has a first protrusion 34a having fixing means that is press-fitted into the insulator 33, and a second protrusion that contacts the surface of the frame 32 with spring elasticity. Piece 34b and
It is characterized in that it is integrally provided with a third projecting piece 34c that contacts the shield wire contact 36 with spring elasticity, and that the insulator 33 forms a recess 33d into which the fixing means of the ground plate 34 is press-fitted.

[Effect]

The connector according to the above means is configured to house a grounding plate that electrically connects a shielded wire contact and a frame whose surface is conductive at least, so that it can be attached to a desired device and the frame can be used to ground the device. When connected to the terminal, the shield wire terminal in the device and the shield wire of the coaxial cable are electrically connected to the ground terminal via the frame. Therefore, for both device-to-device connections using multi-configuration cables made up of multiple coaxial cables or multi-configuration cables in which multiple coaxial cables are covered with shielded wires, there is a connection inside the device and outside the device. It can be applied without wires, and flexibility in connecting devices can be obtained without increasing noise radiation from the connection parts.

〔Example〕

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

FIG. 1 is a side sectional view (A) of an input/output connector according to an embodiment of the present invention, a front view (B) of the insulator mounted on a frame, and FIG. 2 is a perspective view of the ground plate shown in FIG. 1.

Connector 31 attached to the device in FIG.
An insulator 33 made of resin is attached to a frame 32 in which the entire surface of a resin molded body is plated with nickel, and a ground plate 34 is attached to the insulator 33.
and 35, and a plurality of contacts 36 to which the shield wire 10 of the coaxial cable 6 is connected, and a plurality of contacts 37 to which the signal wire 8 of the coaxial cable 6 is connected are planted in the insulator 33. It becomes.

Contacts 36 and 37 are those used in conventional coaxial connectors, and are connected to connection portion 36a or 3 to be connected to a signal source or load within the device.
7a, a locking portion 36b or 37b that is locked to the insulator 33, and a bifurcated connecting portion 36c or 37c that is connected to a contact of a mating connector.

The insulator 33 includes a through hole 33b in which a plurality of contacts 36 are respectively implanted, and a through hole 33b in which a plurality of contacts 37 are respectively implanted.
In FIG. 1A, there is a tongue-shaped elastic piece 33c that prevents the insulator 33 from being pulled out to the left of the frame 32. Above the through hole 33a is a ground plate 34 that electrically connects the contact 36 and the frame 32.
A recess 33d into which the fixing part is press-fitted is provided, and the through hole 3
3b, there are contacts 37 and a frame 32.
A recess 33e is provided into which a fixed portion of a ground plate 35 for electrically connecting the ground plate 35 is press-fitted.

The frame 32 through which the mounting hole 32a to which the insulator 33 is attached has a recess 32b that locks the tip of the tongue-shaped piece 33c, and a recess 32b that locks the tip of the tongue-like piece 33c and a recess 32b that prevents the insulator 33 from being pulled out to the right of the frame 32 in FIG. insulator 3
3 has a protrusion 32c with which a portion of the protrusion 32c comes into contact.

The ground plate 34 includes a first protrusion 34a having a fixing means at its tip that is press-fitted into the recess 33d, and a second protrusion 34b whose tip comes into contact with the frame 32.
A third protrusion 3 whose tip comes into contact with the contact 36
It has 4c. On the other hand, the earth plate 35 has a shape obtained by cutting off the protruding piece 34c of the earth plate 34,
It includes a first protrusion 35a having a fixing means at its tip that is press-fitted into the recess 33e, and a second protrusion 35b whose tip comes into contact with the frame 32.

In FIG. 2, the earth plate 34 is connected to the connecting member 34.
A plurality of protrusions 34b corresponding to each through hole 33a protrude from one side of d, and a plurality of protrusions 34a corresponding to each recess 33d and a plurality of protrusions 34c corresponding to each contact 36 protrude from the other side. A protrusion (fixing means) 34e is formed on the side near the tip of each protrusion 34a to be locked when press-fitted into the recess 33d.

When the connector 31 configured in this manner is attached to a desired device, the frame 32 is electrically connected to the frame ground terminals 15 and 16 of the device, and
A mating connector is fitted into the connector 31. Such a mating connector includes an insulator in which a first connector to which a signal line of a coaxial cable is connected and a second contact to which a shield line of the cable is connected, and a conductive material on at least the surface supporting the insulator. The grounding plate 34 and 35 may further include a grounding plate corresponding to the grounding plates 34 and 35.

Therefore, when a mating connector is fitted to the connector 31, the shield wire 10 of the coaxial cable 6 and the shield terminals 13, 14 of the device are connected to the frame ground terminal 1 of the device via the frame 32 of the connector 31.
5 and 16.

FIG. 3 is a perspective view of a grounding plate according to another embodiment, and the grounding plate 44, which can be used in place of the grounding plate 34, has through-holes 33 in one side of the connecting member 44d.
A plurality of protrusions 44b corresponding to a protrude, and a plurality of protrusions 44 corresponding to each recess 33d on the other side.
a, and a plurality of protrusions 44c corresponding to each contact 36 protrude, and near the tip of each protrusion 44a there is a cut-and-raised protrusion (fixed) that is locked to the insulator 33 when it is press-fitted into the recess 33d. Means) 34e is formed. In addition, the projecting pieces 44a and 34a, 44
b and 34b, 44c and 34c and connecting member 44
d and 34d correspond to each other, and if the protrusion 44c is cut near its base, a ground plate corresponding to the ground plate 35 can be obtained.

〔Effect of the invention〕

As explained above, the connector according to the present invention is
It has a structure that accommodates a contact for connecting a shielded wire and a grounding plate that connects to the conductive frame.The shielded wire of the coaxial cable connected to the contact and the shielded wire terminal of the device equipped with the connector are connected to the frame of the connector. electrically connected via the Therefore, irrespective of the configuration of the coaxial cable for connecting between devices, the connection between devices can be applied without requiring any connecting wires inside or outside the device, and the noise emission at the connection part can be increased. In addition to providing flexibility in connection between devices, this method also has the effect of reducing noise radiation from the connection by several dB compared to conventional methods.

[Brief explanation of the drawing]

FIG. 1 is a connector according to an embodiment of the present invention, FIG. 2 is a perspective view of the grounding plate shown in FIG. 1, FIG. 3 is a perspective view of a grounding plate according to another embodiment, and FIG. 4 is according to the prior art. FIG. 5 is a schematic diagram of device connection according to another conventional technique. In the figure, 6 is a coaxial cable, 8 is a signal line, 10 is a shielded wire, 31 is a connector, 32 is a frame, 33 is an insulator, 33d is a recess, 34 is a ground plate, and 34a and 44a are first protrusions. piece, 34
b, 44b are second projecting pieces, 34c, 44c are third protrusions
, 34e and 44e are fixing means, 37 is a signal line contact, and 36 is a shield line contact.

Claims (1)

[Claims] 1. A plurality of signal line contacts 3 to which the signal line 8 of the cable 6 and its shield line 10 are connected.
7 and an insulator 33 in which the intermediate portion of the shield wire contact 36 is implanted, and a frame 3 that supports the insulator 33 and has conductivity at least on its surface.
2, and a grounding plate 34 attached to the insulator 33, the first projecting piece 34 having fixing means 34e, 44e by which the grounding plate 34 is press-fitted into the insulator 33.
a, 44a, second protrusions 34b, 44b that protrude toward the frame 32 and come into contact with the surface of the frame 32 with spring elasticity, and protrude toward the shield wire contact 36 and make contact with the surface of the frame 32 with spring elasticity.
Third projecting pieces 34c, 44c that contact with spring elasticity
and the insulator 33 is a fixing means 34 for the ground plate 34.
An input/output connector characterized by forming a recess 33d into which the connectors e and 44e are press-fitted.