JPH05114438A - Shield structure of connector - Google Patents

Abstract

PURPOSE:To provide a simple and economical shield structure which can prevent electromagnetic wave noise in a connector from jamming in a shielded cable. CONSTITUTION:A shield part 7 to shield a female connector is fixed in one female connector insertion hole 3a, which is to connect a shielded cable, among a plurality of female connector insertion holes 3 in the way the shield part adheres closely to the inner wall of the insertion hole 3a. Further, the shield part 7 is connected to an earth of an appliance by a fixing screw 8 which is made of a metal and inserted into an installation hole 72 formed in the shield part 7 and a screw hole 5 of a housing 2. Consequently, in the case that a shielded cable and a not shielded cable are connected with one connector 1, the electromagnetic wave noise radiated from the not shielded cable is prevented from jamming in the shielded cable in the connector 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield structure for a connector, which is provided in a device such as an electronic control unit mounted on an automobile and is adapted to connect a plurality of cables.

[0002]

2. Description of the Related Art When a plurality of electronic control devices mounted on a vehicle are connected to each other by a multiplex communication cable, each device is provided with a connector capable of connecting a plurality of cables.

In this type of connector, a plurality of female connector insertion holes are provided in an insulative housing fixed to a device,
A male connector is formed in each female connector insertion hole. In the connector having this structure, a plurality of cables are connected by inserting the female connector attached to the cable into each female connector insertion hole and coupling the female connector with the male connector.

By the way, in order to prevent the electromagnetic wave noise from being mixed into the cable connected to the equipment, it is necessary to use a shielded cable and also shield the connector portion.

When a connector for connecting a plurality of cables as described above is to be shielded, conventionally, the outer periphery of the housing is covered with a shield material so that the entire connector is shielded (for example, Japanese Patent Laid-Open Publication No. Sho. 63
-198271).

[0006]

However, in the conventional shield structure in which the entire connector is shielded, when the shielded cable and the unshielded cable are connected to one connector, the electromagnetic noise radiated from the unshielded cable is It will get mixed into the shielded cable from the inserted female connector. In other words, there is a problem that electromagnetic noise is mixed into the shielded cable inside the connector.

The present invention has been made to solve this problem, and can provide a shield structure that can prevent electromagnetic wave noise in a connector from entering a shielded cable and that is simple and inexpensive. With the goal.

[0008]

In order to achieve the above object, in the shield structure for a connector according to the present invention, a female connector insertion hole for connecting a shield cable among a plurality of female connector insertion holes has a female connector insertion hole. A shield member that shields the connector is fitted in a state in which the shield member is in close contact with the inner wall of the female connector insertion hole and is electrically connected to the ground of the device.

[0009]

[Operation] When the female connector of the shielded cable is inserted into the female connector insertion hole in which the shield member is inserted,
The female connector is surrounded by the grounded shield member and is completely shielded.
Therefore, even if the shielded cable and the unshielded cable are connected to one connector, the electromagnetic noise radiated from the unshielded cable does not mix into the shielded cable from the female connector portion in the connector.

[0010]

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

FIG. 1 is a perspective view showing an example of a shield structure of a connector according to the present invention. FIG. 1A shows a state in which a shield member is fitted in a female connector insertion hole, and FIG. 1B shows a shield member. The state before fitting is shown. See also FIG.
[Fig. 6] is a front view showing another example of the shield structure of the connector according to the present invention, (A) shows a state in which the shield member is fitted in the female connector insertion hole, and (B) does not fit the shield member. It shows the state. In FIGS. 1 and 2, the same parts are designated by the same reference numerals.

As shown in the drawing, a plurality of these connectors 1 are provided in an insulative housing 2 fixed to a device (not shown), three female connector insertion holes 3 in FIG. 1 and two female connector insertion holes 3 in FIG. A male connector 4 (not shown in FIG. 1) is formed in each female connector insertion hole 3 provided therein. In addition, a screw hole 5 for fixing that penetrates to the rear surface is provided in the center of the front surface of the housing 2 of each connector 1. The configuration of these connectors 1 is the same as the existing ones. Then, as shown in FIG. 2, in each female connector insertion hole 3,
By inserting the female connector 6 attached to a cable (not shown) and coupling it with the male connector 4, a plurality of cables are connected.

In the shield structure according to the present invention provided in such a connector 1, a plurality of female connector insertion holes 3 are formed.
Of these, the shield member 7 is fitted in the female connector insertion hole 3a for connecting a shielded cable (not shown).

The shield member 7 is formed of a conductive thin plate material in a frame shape, and the outer dimensions of the shield member 7 are such that the female connector insertion hole 3a is closely fitted to the inner wall of the female connector insertion hole 3a. The internal dimensions of the connector insertion hole 3a are set to be substantially the same. Further, at the front end of the shield member 7, a tongue-shaped mounting portion 73 provided with a mounting hole 72 that matches the screw hole 5 of the housing 2 is provided for fixing the shield member 7 and grounding. It is formed in a protruding state. Further, like the connector 1 of FIG. 1, when the opening of each female connector insertion hole 3 has a protrusion 31 that defines the orientation when the female connector is inserted, a shield member is provided corresponding to the protrusion 31. 7 is provided with a break 71.

The shield member 7 is fitted into the corresponding female connector insertion hole 3a, and the metal fixing screw 8 is inserted through the mounting hole 72 of the shield member 7 and the screw hole 5 of the housing 2 to Fix the connector 1 to the device. Then, the shield member 7 is fixed to the housing 2 of the connector 1 by the fixing screw 8, and the metal fixing screw 8 is coupled to the frame of the device or the ground portion of the printed circuit board in the device, thereby It will be electrically connected to earth.

On the other hand, as shown in FIG. 2A, the external dimensions of the female connector 6a to be attached to the shielded cable are set so that it can be inserted into the female connector insertion hole 3a in which the shield member 7 is inserted. The size is appropriately reduced in advance. That is, as shown in FIG. 2B, the dimension of the existing female connector 6b to be attached to the unshielded cable is determined from the length D0 of the female connector insertion hole 3a to the clearance (play amount) at the time of insertion.
Assuming that the value obtained by subtracting S is (D0-S), the size of the female connector 6a attached to the shielded cable is reduced by twice the thickness T of the plate member of the shield member 7 (D0-S).
2T-S) (only one direction is shown).

The female connector 6a of the shielded cable is inserted into the female connector insertion hole 3a in which the shield member 7 is fitted.
When the female connector 6a is inserted and attached, the female connector 6a is surrounded by the grounded shield member 7 and is completely shielded. Therefore, even if the shielded cable and the unshielded cable are connected to one connector 1, the electromagnetic wave noise radiated from the unshielded cable does not mix into the shielded cable from the female connector 6a in the connector 1.

As described above, in the shield structure according to the present invention, in the female connector insertion hole 3a of the existing connector 1,
The shield member 7 having a simple structure is fitted while being connected to the ground of the device, and the female connector insertion hole 3
Only by appropriately reducing the size of the female connector 6a of the shielded cable to be attached to a from the size of the existing female connector 6b, it is possible to completely shield only the female connector 6a of this shielded cable.

When connecting a plurality of shielded cables, the shield member 7 corresponding to the size of each insertion hole 3a is fitted into the female connector insertion hole 3a for connecting each shielded cable. . Even in that case, the shield members 7 need to be prepared for the number of shielded cables, and since the shield member 7 has a simple structure, this shield structure can be realized easily and at low cost.

Further, as in the above embodiment, the mounting portion 73 is formed on the shield member 7, and the mounting hole 72 of the mounting portion 73 is formed.
The shield member 7 can be easily grounded to the equipment by connecting a metal fixing screw 8 passing through the housing and the screw hole 5 of the housing 2 to the ground portion of the equipment frame or the printed circuit board in the equipment. The connection can be ensured, so that the shield by the shield member 7 can be made completely and highly reliable.

When a plurality of female connector insertion holes 3a for connecting the shielded cables are arranged side by side with the screw holes 5 of the housing 2, a plurality of shield members 7 fitted in the respective insertion holes 3a. May be integrally configured and grounded. Furthermore, between the female connector insertion hole 3a for connecting the shielded cable and the screw hole 5 of the housing 2,
Female connector insertion hole 3b for connecting an unshielded cable
Is present, the mounting portion 73 of the shield member 7 is
It may be formed so as to extend to the position of the screw hole 5 of the housing 2 while avoiding the opening of the female connector insertion hole 3b for the unshielded cable.

[0022]

As explained above, according to the shield structure of the connector of the present invention, it is possible to surely prevent the electromagnetic wave noise in the connector from being mixed into the shield cable. Since it has a simple structure using the connector and the shield member having a simple structure, it can be realized easily and at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a shield structure of a connector according to the present invention, (A) shows a state in which a shield member is fitted in a female connector insertion hole, and (B) shows a shield member fitted therein. Shows the previous state.

FIG. 2 is a front view showing another example of the shield structure for a connector according to the present invention, (A) showing a state where a shield member is fitted in a female connector insertion hole, and (B) showing a shield member fitted therein. It shows the state of not wearing.

[Explanation of symbols]

 1 Connector 2 Housing 3, 3a, 3b Female Connector Insertion Hole 4 Male Connector 5 Screw Hole 6, 6a, 6b Female Connector 7 Shield Member 72 Mounting Hole 73 Mounting Part 8 Fixing Screw

Claims (1)

[Claims] 1. An insulating housing fixed to a device is provided with a plurality of female connector insertion holes, and a male connector is formed in each female connector insertion hole. In a connector configured to connect a plurality of cables by inserting the female connector into the female connector insertion hole and coupling the male connector, a female connector insertion hole for connecting a shielded cable among the plurality of female connector insertion holes is connected. A shield member that shields the female connector is fitted into the mounting hole while being in close contact with the inner wall of the female connector insertion hole and electrically connected to the ground of the device, and is further fixed to the housing of the connector. Screw holes for mounting, and the shield member is provided with mounting portions having mounting holes corresponding to the screw holes of the housing. When the member is fitted in the female connector insertion hole, it is possible to electrically connect the shield member to the ground of the device with the metal fixing screw that passes through the mounting hole of the shield member and the screw hole of the housing. The characteristic shield structure of the connector.