JP2001273946A - Shield connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at water-proofing in a conductor exposed from a core of a shield wire. SOLUTION: The shield wire 10 is covered with a cylindrical housing 25, and a terminal metal fitting 15 is fixed to a conductor 11 exposed from a core 12 of the shield wire 10, and a gap between the sheath 14 of the shield wire 10 and the housing 25 is sealed. In a mounting state to a shield wall 30, since the shield wire 10 is penetrated through a mounting hole 31 and the gap between the housing 25 and the mounting hole 31 is sealed and the housing 25 covers and hides an exposed part of the conductor 11 liquid-tightly wherein the shield wall 30 and a shield layer 13 of the shield wire 10 are conductively connected, there is no risk of the liquid entering inside the conductor 10 through the gap of the core wires constituting the conductor 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded connector having waterproofness.

[0002]

2. Description of the Related Art FIGS. 8 and 9 show an example of a conventional shielded connector disclosed in Japanese Patent Application Laid-Open No. H11-26093. This shield connector includes a shielded electric wire 1 in a cylindrical resin housing 101.
10 is inserted, and a terminal fitting 112 is fixed to a conductor 115 exposed at the end of the shielded electric wire 110. The shielded electric wire 110 is fixed to the resin housing 101 by a holding ring 103, and the space between the housing 101 and the sheath 113 of the shielded electric wire 110 is sealed by a rubber ring 102. A conductive sleeve 104 is provided at a front end of the resin housing 101, and a rear end thereof is inserted into a gap between the shield layer 111 and the core 114 of the shielded electric wire 110, and is electrically conductive by a pressing ring 105 fitted on the outer periphery of the shield layer 111. The sleeve 104 is fixed to the shielded electric wire 110. Further, an inner turning side of the conductive contact piece 106 provided on the outer peripheral surface of the front end of the resin housing 101 is in contact with the front end of the conductive sleeve 104.

In such a shield connector, a terminal fitting 112 and a front end of a shielded electric wire 110 penetrate through a mounting hole of the shield wall (not shown) of an electric device and a flange on the outer periphery of a resin housing 101. 107 is attached by pressing against the opening edge of the mounting hole of the shield wall from the outside and bolting.
In the mounted state, the conductive contact piece 106 is conductively connected to the inner peripheral surface of the mounting hole, whereby the shield wall and the shield layer 1 are connected.
11 are electrically connected through the conductive sleeve 104 and the conductive contact piece 106. The gap between the outer periphery of the resin housing 101 and the mounting hole is sealed by the O-ring 108 mounted on the outer periphery of the resin housing 101 elastically contacting the inner circumference of the mounting hole.

However, in the configuration of the conventional shield connector, the shielded electric wire 11 is
There are also seven basic components necessary for fixing and sealing 0 (components denoted by reference numerals 101 to 106 and 108), and when the other fine components are combined, the number of components is reduced as shown in FIG. It will be very much. For this reason, there has been a problem that the assembling man-hour is increased and the cost is increased. Accordingly, the applicant of the present application has filed an application for a shield connector in which the number of parts is reduced (Japanese Patent Application No.
No. 108050). As shown in FIG. 10, this shield connector 120 has a conductive flange 121 which can be fixed to a shield wall 135 in a conductive state.
The conductive tube 122 is fixed in a conductive state,
2 is conducted to the shield layer 133 of the shielded electric wire 130, and in a first forming step using a mold (not shown), the waterproof cylindrical body 123 made of a soft resin is formed so as to be fitted on the sheath 134 of the shielded electric wire 130. Then, in a second molding step, a hard resin housing 124 is molded so as to fit over the waterproof cylindrical body 123, the sheath 134, the shield layer 133, and the core 132.
An O-ring 125 is attached to the outer periphery of the.

In the shield connector 120, the gap between the shielded electric wire 130 and the housing 124 is sealed by a waterproof tubular body 123. When the shield connector 120 is mounted on the shield wall 135, the inner circumference of the mounting hole 136 is formed. The gap between the shielded wire 130 and the mounting hole 136 is sealed by the elastic contact of the O-ring 125 with the O-ring 125. In such a shield connector 120,
Basic components required for fixing and sealing the shielded electric wire 130 to the housing 124 are denoted by reference numerals 121 to 125.
Only 5 points are needed.

[0006]

In the above shielded connector 120, it is ensured that the shielded connector 120 is protected against inundation from the outside of the shield wall 135 (on the side where the shield connector 120 is attached to the shield wall 135 and on the left side in FIG. 10). Can be stopped. However, since the conductor 131 fixed to the terminal fitting (not shown) at the end of the shielded electric wire 130 is exposed from the core 132 inside the shield wall 135, the gap between the core wires constituting the conductor 131 is formed. (For example, gear oil of an automatic transmission) may penetrate into the core 132 through the core 132.

The present invention has been made in view of the above circumstances, and has as its object to provide waterproofing of a conductor exposed from a core of a shielded electric wire.

[0008]

According to a first aspect of the present invention, a shielded electric wire is covered with a tubular housing, a terminal fitting is fixed to a conductor exposed from a core of the shielded electric wire, and a sheath of the shielded electric wire is provided. In a state where the gap with the inner periphery of the housing is sealed, and in a state where the shield wire is attached to the shield wall, the shield wire is penetrated through the attachment hole of the shield wall, and the outer periphery of the housing and the inner periphery of the attachment hole are formed. Is sealed, and the shield wall and the shield layer of the shielded wire are electrically connected to each other, wherein the housing forms a portion of the conductor exposed from the core in a liquid-tight manner. The configuration is such that it is covered.

According to a second aspect of the present invention, in the first aspect of the present invention, the housing is provided in the mold with at least a portion of the shielded wire exposed from the core of the conductor being housed in the mold. It was configured to be molded by filling with molten resin. According to a third aspect of the present invention, in the second aspect, the shielded electric wire accommodated in the mold is provided with a heat insulating layer surrounding the resin core and the sheath.

According to a fourth aspect of the present invention, in the one of the first to third aspects, the terminal fitting penetrates from the inside of the housing to the outside. And a sealing means interposed therebetween.

According to a fifth aspect of the present invention, at least the sheath and the shield layer of the shielded electric wire are covered with a cylindrical housing,
A terminal fitting is fixed to a conductor exposed from the core of the shielded wire, and a gap between a sheath of the shielded wire and an inner periphery of the housing is sealed. The shield wire is penetrated through the mounting hole to seal a gap between the outer periphery of the housing and the inner periphery of the mounting hole,
In a structure in which the shield wall and the shield layer of the shielded electric wire are electrically connected to each other, the core, the conductor, and the terminal fitting protruding from the housing are liquid-tight by a flexible tube. The configuration is such that the shape is covered.

[0012]

Since the housing covers the exposed portion of the conductor in a liquid-tight manner, the liquid passes through the gap between the core wires constituting the conductor and the shielded electric wire. There is no danger of infiltration into the interior of the device.

[0013] Since the housing is formed by filling the mold with a molten resin in a state where the shielded electric wires are arranged in the mold, the exposed portion of the conductor from the core is reliably formed by the housing. Sealed. Therefore, a reliable liquid-tight state can be obtained. [Invention of claim 3] Since the core and the sheath are covered with the heat insulating layer, there is no possibility of being softened by the heat of the molten resin at the time of molding the housing. [Invention of claim 4] Even if the housing is relatively hard, the penetrating portion of the terminal fitting in the housing is reliably sealed by the sealing means, and the intrusion of liquid into the housing from this penetrating portion is prevented. .

[Invention of Claim 5] Since the core, conductor and terminal fitting protruding from the housing are covered by a flexible tube in a liquid-tight manner, the liquid constitutes the conductor. There is no danger of entering the inside of the shielded electric wire through the gap between the core wires.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. The shielded electric wire 10 includes a conductor 11 in which a plurality of core wires are bundled in order from the axial center side, a relatively flexible core 12 made of synthetic resin (polyethylene in this embodiment), a shield layer 13 made of, for example, a braided wire, and a synthetic resin. (In the present embodiment, vinyl chloride) in a concentric manner. In the terminal part of the shielded electric wire 10, the conductor 11, the core 12, and the shield layer 13 are sequentially exposed from the front end side. Then, a terminal fitting 15 is crimped to a portion of the conductor 11 exposed from the core 12 by caulking the open barrel portion 15A. Further, a front end portion of the terminal fitting 15 (the right side in FIGS. 1 to 5 is referred to as a front side in the following description) is a tab 15B protruding in parallel with the axis of the shielded electric wire 10, and is illustrated in the tab 15B. A mating terminal fitting that does not fit is connected. In addition, tab 1
5B is coated with hot melt 16 (an adhesive made of a polyamide-based thermoplastic resin and a sealing means which is a constituent element of the present invention). 2 to 5,
The thickness of the hot melt 16 is exaggerated in order to clarify its existence, and the thickness of the actually applied hot melt 16 is several tens to several hundreds μm.
It is about.

The shielded electric wire 10 includes a conductive member 17.
Is exterior. The conductive member 17 includes a cylindrical portion 18 and a flange portion 19 projecting radially outward from a front edge of the cylindrical portion 18. The flange portion 19 is non-circular (for example,
A part thereof is a mounting portion 20 to the shield wall 30, and a bolt hole 21 is formed in the mounting portion 20. Further, the flange portion 19 is provided with a plurality of through holes 22 for facilitating the flow of the molten resin in the front-rear direction at the time of molding as described later.

The cylindrical portion 18 of the conductive member 17 is inserted from the front into a gap between the outer periphery of the core 12 and the inner periphery of the shield layer 13, and further, the outer periphery of the shield layer 13 and the sheath 1.
A fixed cylinder 23 is crimped around the outer periphery of the end of the cylinder 4.
The caulking of the fixed cylinder 23 restricts the cylindrical part 18 from coming out from between the core 12 and the shield layer 13, and thus the conductive member 17 is fixed to the shielded electric wire 10. The shielded electric wire 10 is provided with a heat insulating layer 24 made of synthetic resin (in this embodiment, relatively flexible urethane). Specifically, the front end of the sheath 14, the end of the shield layer 13 exposed from the sheath 14, the end of the core 12 exposed from the shield layer 13, and the end of the conductor 11 exposed from the core 12 , And the inner periphery of the cylindrical portion 18 and the flange portion 19 of the conductive member 17 are formed to cover the entire periphery. The heat insulating layer 24 also covers the whole of the open barrel portion 15A of the terminal fitting 15 and the latter half of the application region of the hot melt 16 at the base end of the tab 15B. Since the heat insulating layer 24 is in liquid-tight contact with each of the above portions, the heat insulating layer 2
4, the sheath 14 of the shielded wire 10
Liquid is prevented from entering through a gap between the outer periphery of the heat insulating layer 24 and the inner periphery of the heat insulating layer 24. On the other hand, at the front end, a gap between the outer periphery of the tab 15B and the inner periphery of the heat insulating layer 24 is sealed by the hot melt 16 so that liquid cannot enter.

Further, the shielded electric wire 10 is provided with a housing 25 made of a synthetic resin (polyamide having a higher rigidity than the heat insulating layer 24 in this embodiment) in a cylindrical shape so as to cover the heat insulating layer 24. I have. At the rear end of the housing 25, the outer periphery of the heat insulating layer 24 and the inner periphery of the housing 25 are in close contact with each other in a liquid-tight manner to exhibit sealing performance.
Liquid is prevented from entering between the housing 25 and the sheath 14 of the shielded electric wire 10. On the other hand, at the front end of the housing 25, the housing 25 covers the entire front end surface of the heat insulating layer 24, and is in close contact with the outer periphery of the front half of the application region of the hot melt 16 at the base end of the tab 15B. So the housing 25
Is prevented from entering the housing 25 from between the housing 25 and the terminal fitting 15 at the front end of the housing 25. In addition, a seal groove 26 is formed in the outer periphery of the housing 25 in a form in which a position close to the front of the flange portion 19 of the conductive member 17 is notched in the circumferential direction,
An O-ring 27 is mounted in the seal groove 26.

The shield connector A is mounted on a shield wall 30 having conductivity. Shield wall 30
Has a mounting hole 31 penetrating in the front-rear direction,
It has a bolt hole 32 corresponding to the bolt hole 21 of the conductive member 17. The shielded connector A is connected to the shielded electric wire 10.
In addition, the terminal fitting 15 is made to penetrate the mounting hole 31 from the rear to the front, and the mounting portion 20 of the flange portion 19 of the conductive member 17 is brought into close contact with the rear end surface of the shield wall 30. By attaching a bolt (not shown) and screwing and tightening a nut (not shown), it is attached to the shield wall 30. In the mounted state, the flange portion 19 is pressed against the shield wall 30 to be electrically connected, and thus the shield layer 13 is electrically connected to the shield wall 30 via the conductive member 17. An O-ring 27 is provided between the outer periphery of the housing 25 and the inner periphery of the mounting hole 31.
Is crushed and adheres to both surfaces in a liquid-tight manner, whereby the sealing performance is exhibited. As a result, the flow of the liquid in the path passing between the mounting hole 31 and the housing 25 is prevented.

Next, the steps of assembling and forming the shield connector A will be described. First, as shown in FIG. 2, the conductive member 17, the fixing cylinder 23, and the terminal fitting 15 are assembled to the shielded electric wire 10, and the hot melt 16 is applied to the outer periphery of the tab 15B.

Next, the shielded electric wire 10 is connected to the heat insulating layer 24.
Are set in primary molding dies 35 and 36 for molding (see FIG. 3). At this time, the flange 19 of the conductive member 17, the tab 15B, and the sheath 1
The shield wire 10 and the terminal fitting 15 are positioned and fixed to the dies 35 and 36 by fitting the 4 into the holding grooves 37 of the dies 35 and 36. From this state, the molds 35, 3
6 is filled with a molten urethane resin (not shown). The melting temperature of this urethane resin is, for example, 160 to 1
The temperature is a relatively low temperature of about 80 ° C., and the time required from completion of filling of the molten resin to opening of the mold is a relatively short time of about 20 seconds, for example.
At this temperature and time, neither the vinyl chloride sheath 14 of the shielded electric wire 10 nor the polyethylene core 12 is softened or melted.

When the heat insulating layer 24 has been formed, the heat insulating layer 24 is removed from the primary molding dies 35 and 36, and
5 is set in secondary molding dies 38 and 39 for molding. At this time, the flange portion 19 of the conductive member 17, the tab 15B, the sheath 14 of the shielded electric wire 10, and the heat insulating layer 2
4 is fitted into the holding groove 40 of the molds 38 and 39, so that the shielded electric wire 10, the terminal fitting 15, and the heat insulating layer 24 are formed.
Are positioned and fixed with respect to the molds 38 and 39. In this state, the molds 38 and 39 are filled with a molten polyamide resin (not shown). The melting temperature of this polyamide resin is a relatively high temperature, for example, 260 to 280 ° C.
4, the core 12 and the sheath 14 are softened or melted by the heat of the polyamide resin because the heat insulating layer 24 is interposed between the polyamide resin and the core 12 and the sheath 14. Is prevented. The time required from the completion of the filling of the polyamide resin to the opening of the mold is a relatively short time of, for example, about 20 seconds. When the polyamide resin is cured and the housing 25 is formed, the housing 25 is removed from the molds 38 and 39, and the O-ring 27 is attached to the outer periphery of the housing 25. Thus, the assembly and molding of the shield connector A are completed.

As described above, according to the shielded connector A of the present embodiment, the basic components necessary for fixing and sealing the housing 25 and the shielded electric wire 10 include the conductive member 17,
Only the heat insulating layer 24, the housing 25, the O-ring 27 and the hot melt 16 are required. Therefore, the number of assembling steps is small, and the cost is kept low. Also,
Since the housing 25 covers the exposed portion of the conductor 11 from the core 12 in a liquid-tight manner, the liquid passes through the gap between the core wires constituting the conductor 11 and the shielded electric wire 10.
Is prevented from penetrating into the inside. In particular, in the present embodiment, the housing 25 is made to have high rigidity in order to secure a sealing function by the O-ring 27 on the outer periphery of the housing 25, and the front end of the housing 25 is formed into a highly rigid tab 15B. Although it is in a state of being exteriorly mounted, since the hot melt 16 is interposed between the tab 15B and the housing 25, the space between the housing 25 and the tab 15B is securely sealed. This reliably prevents liquid from entering the housing 25 and reaching the conductor 11.

The housing 25 is provided with the shielded electric wires 10 in the dies 38, 39, and the dies 38, 39 are provided.
Of the conductor 11 from the core 12 is filled with the molten resin.
Is surely sealed. Therefore, a reliable liquid-tight state can be obtained. Also, the mold 3 in which the housing 25 is molded
The shielded electric wire 10 is set in the insides 8 and 39. Since the core 12 and the sheath 14 of the shielded electric wire 10 are covered with the heat insulating layer 24, the core 12 and the sheath 12 are heated by the heat of the molten resin for molding the housing. 14 is prevented from softening. In addition, since the heat insulating layer 24 is made of a flexible material, when the shielded electric wire 10 and the terminal fitting 15 are thermally expanded, the heat insulating layer 24 is deformed to absorb the distortion, and the stress generated in the shielded electric wire 10 and the terminal fitting 15 is reduced. Can be reduced.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. Embodiment 1
In the embodiment, the housing 25 covers the exposed portion of the conductor 11 from the core 12 in a liquid-tight manner. However, in the second embodiment, the front end of the housing 50 only surrounds the middle of the core 12, From there, the core 1
2 and the conductor 1
1, the exposed portion from the core 12 and the latter half of the terminal fitting 51 fixed to the front end of the conductor 11 are:
The heat-shrinkable tube 52 having flexibility has a liquid-tightly covered form. The tube 52 is composed of two types, an inner tube 52A and an outer tube 52B, and contracts in a reduced diameter by heating. The rear end of the tube 52 is in liquid-tight contact with the outer periphery of the front end of the heat insulating layer 53 extending from the front end of the housing 50. The front end of the tube 52 is in close contact with the outer periphery of the closed barrel portion 51A of the terminal fitting 51 in a liquid-tight manner,
The tab 51B is exposed forward from the tube 52 over its entire length. The region between both ends of the tube 52 is in close contact with the outer periphery of the front end of the core 12 and the conductor 1
Surround 1 Prior to bringing the tube 52 into close contact with the tab 51B, a hot melt (not shown) may be applied to the outer periphery of the tab 51B in advance.
Instead of applying the hot melt to 1B, a tube 52 having the inner peripheral surface coated with the hot melt in advance may be used. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and the description of the structure, operation, and effect is omitted. In the second embodiment, the core 1 protruding from the housing 50
2. Since the conductor 11 and the terminal fitting 51 are covered with a flexible tube 52 in a liquid-tight manner, the liquid penetrates into the inside of the shielded electric wire 10 through the gap between the core wires constituting the conductor 11. There is no danger.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. Embodiment 2
In the third embodiment, the front end of the tube 52 is in close contact with the outer periphery of the closed barrel portion 51A of the terminal fitting 51, whereas in the third embodiment, the front end of the tube 52 is
It has the same configuration as the terminal fitting 15 of the first embodiment and is in close contact with the rear end of the open barrel portion 15A and the rear end of the tab 15B in a liquid-tight manner. The other configuration is the same as that of the second embodiment, and thus the same configuration is denoted by the same reference numeral, and the description of the structure, operation, and effect is omitted.

[Other Embodiments] The present invention is not limited to the embodiment described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the above embodiment, the sealing means is provided at the portion of the housing where the terminal fitting penetrates. However, according to the present invention, the housing may directly contact the terminal fitting.

(2) In the above embodiment, the sealing means provided at the portion of the housing through which the terminal fitting penetrates is a member separate from the heat insulating layer. However, according to the present invention, the heat insulating layer is formed by the gap between the housing and the terminal fitting. May be provided so as to have the function of the sealing means. (3) In the above embodiment, the heat insulating layer is interposed between the housing and the shielded electric wire. However, according to the present invention, when the housing can be formed at a low temperature without the possibility of softening the core and the sheath, the heat insulating layer is used. May be provided.

(4) In the above-described embodiment, a hot melt in a form in which it is in close contact with the outer periphery of the tab is used as the sealing means.
According to the present invention, the heat-shrinkable tube may be simply attached to the tab without using the hot melt. (5) In the above embodiment, urethane is used as the heat insulating layer. However, according to the present invention, another synthetic resin material such as an elastomer may be used.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a separated state according to a first embodiment.

FIG. 2 is a cross-sectional view showing a state where a terminal fitting, a conductive member, a holding member, and sealing means are attached to the shielded electric wire.

FIG. 3 is a sectional view showing a mold for primary molding.

FIG. 4 is a sectional view showing a mold for secondary molding.

FIG. 5 is a cross-sectional view showing a state where it is attached to a shield wall.

FIG. 6 is a sectional view of the second embodiment.

FIG. 7 is a sectional view of Embodiment 3.

FIG. 8 is a sectional view of a conventional example.

FIG. 9 is an exploded perspective view of a conventional example.

FIG. 10 is a sectional view of a conventional example.

[Explanation of symbols]

 A: Shield connector 10: Shielded electric wire 11: Conductor 12: Core 13: Shield layer 14: Sheath 15: Terminal fitting 16: Hot melt (sealing means) 24: Heat insulation layer 25: Housing 30: Shield wall 31: Mounting hole 38: Mold 39 ... Mold 50 ... Housing 51 ... Terminal fitting 52 ... Tube 53 ... Heat insulation layer

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoichi Kanakawa 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5E087 EE07 FF13 GG02 GG08 LL02 LL03 LL17 RR12

Claims (5)

[Claims] 1. A shielded electric wire is covered with a cylindrical housing, a terminal fitting is fixed to a conductor exposed from a core of the shielded electric wire, and a gap between a sheath of the shielded electric wire and an inner periphery of the housing is sealed. In a state where the shield wire is attached to the shield wall, a gap between an outer periphery of the housing and an inner periphery of the attachment hole is sealed by passing the shield wire through an attachment hole of the shield wall, and the shield wall is And a shield layer of the shielded electric wire, wherein the housing is configured to cover a portion of the conductor exposed from the core in a liquid-tight manner. Shield connector. 2. The housing is formed by filling a mold with a molten resin in a state in which at least a portion of the shielded wire exposed from the core of the conductor is accommodated in the mold. The shielded connector according to claim 1, wherein: 3. The shielded connector according to claim 2, wherein the shielded electric wire accommodated in the mold is provided with a heat insulating layer surrounding the resin core and the sheath. 4. The terminal according to claim 1, wherein the terminal is penetrated from the inside of the housing to the outside, and a sealing means is provided at a penetrating portion of the terminal in the housing. A shielded connector characterized by being mounted. 5. A shielded electric wire, wherein at least a sheath and a shield layer are covered with a cylindrical housing, and a terminal fitting is fixed to a conductor exposed from a core of the shielded electric wire,
A gap between a sheath of the shielded wire and an inner periphery of the housing is sealed, and in a state where the shielded wire is attached to a shield wall, the shielded wire is penetrated through a mounting hole of the shield wall, and the outer periphery of the housing and the A gap between the inner circumference of the mounting hole is sealed, and the shield wall and the shield layer of the shielded wire are electrically connected to each other. The core, the conductor, and the conductor protruding from the housing. A shielded connector characterized in that the terminal fitting is covered with a flexible tube in a liquid-tight manner.