JP2002343491A - Shield connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield connector of reduced cost, by simplifying the electrical connection of a shield system and reducing the number of parts. SOLUTION: The shield connector comprises a female connector 16, provided with a female terminal 34 press-bonded with a core wire 12a of a shielded electric wire 12 and a male connector 14 provided with a male terminal 24 connected with the female terminal 34. The male connector 14 has a male housing 50, attached to an inner side of a shield case 10a of an electrical apparatus 10. The female connector 16 has a rubber packing 56, attached to an outer circumference of a shield layer 12c of the shielded electric wire 12, with the front face pressed against the shield case 10a. The shield layer 12c and the shield case 10a are made to contact directly, by pressing the rubber packing 56 against the shield case 10a in a state of an end part of the shield layer 12c expansively opened to the front face of the rubber packing 56.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded connector used to connect a shielded electric wire provided with a shield layer to an electric device or the like or to each other.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional shielded connector. This shield connector is used, for example, to connect a shielded electric wire 12 to an electric device 10 installed inside an automobile in a watertight manner. This shielded connector comprises a male connector 14 and a female connector 16 that can be mated with each other.
14 is attached to the electric device 10, and the female connector 16 is attached to an end of the shielded wire 12. The main body (not shown) of the electric device 10 is housed in a shield case 10a made by aluminum die casting or the like. Shielded wire 12
Is a core wire 12a, an insulating layer 12b, a shield layer 12c, and a sheath 12
d.

The male connector 14 has a male housing 18 made of an engineering plastic such as PBT (polybutylene terephthalate).
A shield pipe 20 formed by molding a thin plate of a conductive metal such as a copper alloy into a cylindrical shape is firmly fixed to the inner surface of the pipe 18. The shield pipe 20 has an elastic piece 20a on the rear end side which is expanded so as to come into contact with the shield case 10a. A terminal holder 22 made of engineering plastic such as PBT is firmly fixed to the rear end side of the shield pipe 20,
A male terminal 24 made of a plate such as a copper alloy is
Is firmly held. The male housing 18 has a flange portion 18a on the rear end side, and a seal ring 26 made of silicone rubber or the like is provided on an end surface of the flange portion 18a.
Is attached.

The male connector 14 configured as described above
Is fixed to the electric device 10 by aligning the bolt hole 18b of the flange portion 18a with the female screw hole 10b of the shield case 10a and screwing a bolt (not shown).
As a result, the shield pipe 20 and the shield case 10a are electrically connected via the elastic pieces 20a, and the space between the male housing 18 and the shield case 10a is water-tightly sealed by the seal ring 26.

Next, the female connector 16 will be described according to an assembling order. A ring-shaped wire sealing member 28 made of silicone rubber or the like and a ring-shaped retainer 30 made of engineering plastic such as PBT are inserted through the shielded wire 12 in advance. The wire seal member 28 and the retainer 30 are slidable in the longitudinal direction of the shielded wire 12. Next, a shield ring 32 made of a conductive metal such as brass is crimped on the shield layer 12c exposed at the end of the shielded electric wire 12, and a female terminal 34 is crimped on the core wire 12a.

After that, the female terminal 34 is inserted into the female housing 36. Then, the female terminal 34 is locked inside the female housing 36 by the housing lance 36a. A cylindrical shield pipe 38 made of a conductive metal such as a copper alloy is integrally provided on the female housing 36 by insert molding. When the female terminal 34 is inserted into the female housing 36, the outer peripheral portion of the shield ring 32 contacts the inner peripheral surface of the shield pipe 38. Thereby, the shield layer 12c of the shielded electric wire 12
And the shield pipe 38 of the female housing 36 are electrically connected via the shield ring 32.

Next, the wire seal member 28 inserted around the outer periphery of the wire is pulled back and arranged at the position shown in the drawing, and the retainer 30 is pulled back and attached to the female housing 36. This attachment is performed by hooking the lock arm 30a of the retainer 30 to the locking projection 36b of the female housing 36.
Thereby, the space between the shielded electric wire 12 and the female housing 36 is sealed watertight. Thus, the assembly of the female connector 16 is completed.
The female housing 36 is provided with a ring-shaped housing seal member 40 for sealing the space between the female housing 36 and the male housing 18 in a water-tight manner.

The female connector 16 configured as described above
Is fitted to the male connector 14 attached to the shield case 10a as described above, the lock arm 36c of the female housing 36 is caught by the locking projection 18c of the male housing 18, and the female connector 16 cannot be pulled out. Thus, a housing seal member is provided between the female housing 36 and the male housing 18.
Sealed by 40. Further, the shield pipe 38 of the female housing 36 and the shield pipe 20 of the male housing 18 come into contact, and the female terminal 34 and the male terminal 24 are fitted. As a result, the shield layer 12c of the shielded wire 12 is electrically connected to the shield case 10a of the electric device 10, and the shielded wire 12 is
Connected watertight to 10.

[0009]

In the conventional shielded connector, the shield layer 12c of the shielded electric wire is connected to the shield case 10a of the electric device via the shield ring 32, the female shield pipe 38, and the male shield pipe 20 in this order. Will be connected. Of the connection points between these parts, the connection points between the shield ring 32 and the female shield pipe 38 and the female shield pipe 38 and the male shield pipe 20
At the connection point with the pipe, a slightly smaller diameter pipe is inserted into the other pipe and connected by rubbing, and both pipes have a square shape even if the shape is cylindrical. Even in the case of a cylindrical shape, the external dimensions and the internal dimensions must be precisely manufactured. If there are errors in these dimensions, insertion will not be possible, or a gap will be formed between the pipes, causing poor contact. In addition, the conventional shield connector has a large number of components, and thus costs are high.

The above-described shielded connector is for connecting a shielded electric wire to an electric device, but the shielded connector for connecting shielded electric wires has a similar problem.

In view of the above problems, an object of the present invention is to provide a shielded connector that simplifies electrical connection of a shield system, reduces the number of components, and reduces cost.

[0012]

Means for Solving the Problems To achieve this object, a shielded connector for device connection according to the present invention includes a female connector having a female terminal crimped on a core of a shielded electric wire, and A male connector having a male terminal to be connected, the male connector having a male housing attached to the inside of a shield case of an electric device, and the female connector being provided on an outer periphery of a shield layer of a shielded electric wire. A rubber packing is attached and the front surface is pressed against the shield case of the electric device, and by pressing the rubber packing against the shield case with the end of the shield layer expanded on the front surface of the rubber packing. And the shield layer and the shield case are brought into direct contact with each other.

In the above shield connector, it is preferable that the rubber packing has a shield layer holding portion for holding an end of the shield layer of the shielded wire in an expanded state on a front surface thereof.

The shield layer holding portion includes an annular groove formed on the front surface of the rubber packing, and a fixing ring that pushes and fixes the tip of the expanded shield layer into the annular groove. Is preferred.

Further, the shielded connector for connecting a shielded electric wire according to the present invention includes a female connector having a female terminal crimped to a core of one shielded electric wire, and a male terminal crimped to a core of the other shielded electric wire. The female connector and the male connector each have a shield pipe, and the shield pipes of both connectors are such that the tips contact each other when the female terminal and the male terminal are connected. And the female connector and the male connector each have a rubber packing attached to the outer periphery of the shield layer of the shielded wire and pushed into the shield pipe, and the outer peripheral surface of the rubber packing has the shield. By pushing the rubber packing into the shield pipe with the end of the layer expanded, the shield layer is And contacting the inner surface of the pipe.

In this shielded connector, each of the female connector and the male connector has a fixing ring for fixing the distal end of the shield layer expanded on the outer peripheral surface of the rubber packing on the outer peripheral surface of the shielded electric wire. It is preferred that

[0017]

Hereinafter, embodiments of the present invention will be described.
This will be described in detail with reference to the drawings.

Embodiment 1 FIG. 1 shows an embodiment of the present invention. The shield connector connects the shielded electric wire 12 to the electric device 10. 1A is a vertical sectional view, and FIG. 1B is a horizontal sectional view. In the figure, 10 is an electric device, 10a is a shield case of the electric device 10, 12 is a shielded electric wire, 14 is a male connector, and 16 is a female connector. Neither the male connector 14 nor the female connector 16 has a conventional shield pipe.

The male connector 14 includes a male housing 50 mounted inside the shield case 10a of the electric device, and a male terminal 24 fixedly supported at the rear end of the male housing 50. The contact part of male terminal 24 is male housing 50
Projecting into the internal space of The internal space of the male housing 50 is connected to the external space of the shield case 50 through a hole 52 formed in the shield case 10a.

On the other hand, the female connector 16 includes a female housing 54 for accommodating and fixing the female terminal 34 therein, a rubber packing 56 mounted on the outer circumference from the shield layer 12c to the sheath 12d of the shielded electric wire, and a rubber case 56 formed of a shield case. It is composed of a retainer 58 pressed against 10a. The female housing 54 is made of engineering plastic such as PBT, and the retainer 58 is made of metal or PBT.
It is made of engineering plastics. The rubber packing 56 has a cylindrical portion 56a pressed against the outer periphery of the sheath 12d of the shielded electric wire and a flange portion 56b pressed against the outer surface of the shield case 10a. An annular groove 60 is formed in the front surface (the surface on the shield case 10a side) of the rubber packing 56, and a fixing ring 62 is pushed into the annular groove 60. The fixing ring 62 pushes and fixes the distal end of the shield layer 12 c expanded on the front surface of the rubber packing 56 into the annular groove 60.

The female connector 16 is assembled as follows. First, the end of the shielded wire 12 is peeled off as shown in FIG. 2, and the female terminal 34 is crimped to the exposed core wire 12a. Female terminal 34
It is preferable that the size of the projected cross section in the direction of arrow A of FIG. The length L of the exposed portion of the shield layer 12c is expanded to the front of the rubber packing 56 as described above, and
It should be long enough to hold at 62.

Next, a shielded wire crimped with the female terminal 34
12 is inserted through a retainer 58 to which a rubber packing 56 is previously attached as shown in FIG. After that, the end of the shield layer 12c of the shielded wire is spread almost evenly on the front surface of the rubber packing 56, and then the fixing ring 62 is pushed into the annular groove 60 of the rubber packing 56. As a result, the tip of the shield layer 12 is pushed into the annular groove 60 and is held in the groove 60. Thereafter, the female housing 54
When the female connector 16 is attached (see FIG. 1), the assembly of the female connector 16 is completed.

The female connector 16 assembled in this manner is, as shown in FIG.
From the outside of 10a, it is inserted into the male housing 50 through the hole 52. When the insertion is completed, the male terminal 24 and the female terminal 34 are electrically connected, and the flange 56 of the rubber packing 56 is connected.
b is pressed against the shield case 10a. For this reason, the shield layer 12c which is expanded on the front surface of the rubber packing 56
Is in contact with the edge of the hole 52 of the shield case 10a, and the shield layer 12c and the shield case 10a are electrically connected.

On the other hand, the retainer 58 has an elastic arm 64 extending from the rear end side to the distal end side, and a locking projection 66 is formed at the distal end (free end) of the elastic arm 64. When the fitting of the male connector 14 and the female connector 16 is completed as shown in FIG.
The female connector 16 is prevented from falling out of the male connector 14 by engaging with the locking portion 68 provided on the male connector 14. In this state, the flange portion 56b of the rubber packing 56 is
Between the shield wire and the retainer 58, and the tubular portion 56a is sealed with the sheath 12d of the shielded electric wire and the retainer 58.
To seal the space between them in a watertight manner.

As described above, in the shielded connector of this embodiment, the shield layer 12c of the shielded wire 12 comes into direct contact with the shield case 10a of the electric device due to the elastic repulsion of the rubber packing 56. The number of components can be significantly reduced as compared with the conventional shield connector, and the reliability of the connection of the shield system can be improved because the number of contact points of the shield components is small.

When releasing the engagement between the male connector 14 and the female connector 16, the elastic arm 64 is elastically deformed by applying a force with a finger or the like to release the engagement between the locking projection 66 and the locking portion 68. After that, the female connector 16 may be pulled out.

Embodiment 2 FIG. 4 shows another embodiment of the present invention. This shield connector is shielded wire 12A
And a male connector 14 and a female connector 16 for connecting the first connector 12B to the second connector 12B. FIG. 4A is a vertical sectional view, and FIG.
Is a horizontal sectional view.

The male connector 14 has a male terminal 24 crimped to a core wire 12a of one shielded electric wire 12A in a male housing 18, and the female connector 16 has a core wire of the other shielded electric wire 12B in a female housing 36. It has a female terminal 34 crimped to 12a. The male connector 14 also has a shield pipe 20 with a longitudinal middle part integrated with the male housing 18, and the female connector 16 also has a shield pipe 38 with a longitudinal middle part integrated with the female housing 36. Have. The distal end portion 20t of the shield pipe 20 of the male connector 14 projects into the distal end cylindrical portion 18t of the male housing 18, and the female connector 16
The tip 38t of the shield pipe 38 is also a female housing
36 protrudes into the distal end cylinder portion 36t.

The shield layer 12 of the shielded electric wires 12A and 12B
A rubber packing 56 is mounted on the outer periphery of each of the rubber packings 56, and a shield layer 12c is formed on the outer peripheral surface of the rubber packing 56.
End is expanded and folded back. Shield layer 12c
Is located on the sheath 12d, and is held on the sheath 12d by the fixing ring 62. A waterproof seal rubber 70 and a press ring 72 are mounted on the outer periphery of the sheath 12d of the shielded electric wire.

When the end of one shielded electric wire 12A subjected to the terminal treatment as described above is inserted into the male housing 18 and the end of the other shielded electric wire 12B is inserted into the female housing 36, the shield layer 12c of both electric wires is formed. But each have rubber packing
The elastic repulsive force of 56 presses against the inner surfaces of the shield pipes 20, 38, and is electrically connected to the shield pipes 20, 38.
Waterproof seal rubber 70 is pushed into the rear ends of the male housing 18 and the female housing 36, respectively,
Water tightness between A and 12B is maintained. Waterproof seal rubber 70
Is held by the holding ring 72 so as not to escape from the rear ends of the male housing 18 and the female housing 36.

FIG. 4 shows a state in which the male connector 14 and the female connector 16 assembled as described above are fitted. That is, when the male connector 14 and the female connector 16 are fitted, the male terminal 24 and the female terminal 34 are fitted to each other, and
Are electrically connected to each other, and the distal end portion 20t of the shield pipe 20 and the distal end portion 38t of the shield pipe 38 come into contact with each other to electrically connect the shield layers 12c of both electric wires to each other.
The tip cylindrical portion 18t of the female housing 36 and the tip cylindrical portion 36t of the female housing 36 are fitted to each other, and the waterproof seal rubber 74 ensures watertightness between the connectors 14 and 16.

In the shielded connector of this embodiment, the shield layer of the shielded wire is brought into direct contact with the inner surface of the shield pipe by the elastic repulsive force of the rubber packing, so that the number of parts can be reduced as compared with the related art, and the shield is reduced. The dimensional accuracy of the pipe can be reduced, and the reliability of the connection of the shield system can be improved because the number of contact points of the shield parts is small.

[0033]

According to the present invention as described above,
Since the shield layer of the shielded wire is brought into contact with the shield member by rubber packing, the number of parts of the shield connector can be reduced and the dimensional accuracy can be reduced, so that the cost can be reduced. Further, the number of contact points of the components of the shield system is reduced, so that the reliability can be improved.

[Brief description of the drawings]

FIG. 1A is a vertical sectional view and FIG. 1B is a horizontal sectional view showing one embodiment of a shielded connector according to the present invention.

FIG. 2 is an exemplary perspective view showing a state in which a female terminal is attached to an end of the shielded wire in a process of assembling the connector of FIG. 1;

FIG. 3 is a partially cutaway perspective view showing the next stage of FIG. 2 in the process of assembling the connector of FIG. 1;

4A and 4B show another embodiment of the shielded connector according to the present invention, wherein FIG. 4A is a vertical sectional view and FIG. 4B is a horizontal sectional view.

FIG. 5 is a vertical sectional view showing a conventional shield connector for device connection.

[Explanation of symbols]

 10: Electrical equipment 10a: Shield case 12: Shield wire 14: Male connector 16: Female connector 24: Male terminal 34: Female terminal 50: Male housing 54: Female housing 56: Rubber packing 58: Retainer 60: Annular groove 62: Fixed ring

Claims (5)

[Claims] 1. A female connector having a female terminal crimped to a core wire of a shielded electric wire, and a male connector having a male terminal connected to the female terminal, wherein the male connector is a shield of an electric device. A male housing attached to the inside of the case, wherein the female connector has a rubber packing attached to an outer periphery of a shield layer of the shielded wire and a front surface of which is pressed against a shield case of the electric device; A shield connector, wherein the shield layer and the shield case are brought into direct contact by pressing the rubber packing against the shield case in a state where the end of the shield layer is expanded on the front surface of the rubber packing. . 2. The shielded connector according to claim 1, wherein the rubber packing has a shield layer holding portion on a front surface thereof for holding an end of the shield layer of the shielded wire in an expanded state. 3. The shield layer holding portion includes an annular groove formed on the front surface of the rubber packing, and a fixing ring that pushes and fixes the distal end of the expanded shield layer into the annular groove. The shielded connector according to claim 2, wherein 4. The female connector, comprising: a female connector having a female terminal crimped on a core of one shielded electric wire; and a male connector having a male terminal crimped on a core of the other shielded electric wire. The male connector and the male connector each have a shield pipe, and the shield pipes of both connectors are such that the tips contact each other when the female terminal and the male terminal are connected, and the female connector and the male connector Each has a rubber packing attached to the outer periphery of the shield layer of the shielded wire and pushed into the shield pipe, and the rubber packing is expanded on the outer peripheral surface of the rubber packing with the end portion of the shield layer expanded. By pushing the packing into the shield pipe, the shield layer comes into contact with the inner surface of the shield pipe. Shield connector. 5. The female connector and the male connector, respectively,
5. The shield connector according to claim 4, further comprising a fixing ring for fixing a distal end portion of the shield layer expanded on an outer peripheral surface of the rubber packing to an outer peripheral surface of the shielded electric wire.