TWM458006U - Solar electrical connector - Google Patents

Description

Solar electrical connector

This creation relates to a cable connector, in particular a solar electrical connector that is waterproof, safe, and has the advantages of a compact structure.

Due to the increasing environmental protection and energy supply problems, many advanced countries have spared no effort to promote the solar photovoltaic industry, which has also brought the solar photovoltaic industry back to the attention. The solar power supply equipment for household use or the green buildings using solar energy are obvious. growing up.

Because solar photovoltaic systems are installed outdoors, long-time high-heat exposure and day-night temperature difference, it is easy to cause damage and failure of solar photovoltaic equipment. For solar power connectors commonly used in solar photovoltaic equipment, in addition to overcoming the outdoor environment In addition to the severe test, the relevant safety regulations must be passed and the reliability of the electrical connection must be ensured. For the construction workers, the convenience of the operation of the solar electrical connector is the same as when the manufacturer designs and manufactures the solar electrical connector. Issues to consider.

There are many types of solar electric connectors available, for example, the disclosed Chinese utility model patent application number 201020299466.3 "solar cable connector" and The disclosed Chinese utility model patent application number 201120337085.4 "solar photovoltaic connector" has disclosed such solar electrical connectors, but the construction of these known solar electrical connectors is complicated, and the cost of manufacturing and assembly is also made. increase.

The purpose of this creation is to provide a solar electrical connector that is waterproof and prevents sparking.

An embodiment of the solar power connector of the present invention comprises: a female end connector having a female end insulating body, a plurality of female terminals, a wire harness and a tightening nut; and the female insulating body having a front end position a coupling portion and a connecting portion at a position of the rear portion, the coupling portion has a coupling port, the inside of the coupling port has a plurality of airtight tubes, and the inside of the female insulating body has a number of connecting portions and coupling portions along the axial direction a female terminal hole, the front end of the female terminal has a socket, the socket of the female terminal can extend into the airtight tube inside the coupling portion, and has a plurality of isolating plates extending in a radial shape at the end face of the connecting portion, in any two a female terminal hole is disposed between adjacent spacer plates, and an end portion of the spacer plate extending toward the radiation direction further has a crotch portion protruding toward the adjacent one of the other isolation plates; and a male connector has a male end End insulation body, a nut and several male ends The male end insulating body has a plug portion at the front portion and a mounting portion at the rear portion, the inside of the plug portion has an airtight chamber, and the inside of the male end insulating body has a plug portion and a mounting portion extending along the axial direction. a plurality of male terminal holes, the pins at the front end of the male terminal may extend into the airtight chamber inside the plug portion, and the gap between the pin and the wall surface of the airtight chamber has a gap, and the plug portion has a front portion and a rear portion. The front section can be inserted into the coupling port of the female insulating body in a gas-tight relationship, and the airtight tube in the coupling port of the female insulating body is inserted into the airtight chamber in a close relationship, and the pin of the male terminal is simultaneously inserted into the female Among the jacks of the terminal, the end surface of the mounting portion has a plurality of spacers extending in a radial shape, and a male terminal hole is disposed between any two adjacent spacers, and the end of the spacer extending toward the radiation direction is further There is a crotch portion that protrudes in the direction of the other of the adjacent plates.

Another object of the present invention is to provide a solar electrical connector that facilitates the disassembly and assembly of cables. One embodiment of the construction includes a male terminal and a female terminal connected in a detachable relationship with the core of the cable, wherein the tail of the male terminal The end has a male end cable connecting portion, the male end cable connecting portion has a cable hole and a screw hole, and a fixing bolt is mounted on the screw hole for clamping the core wire of the cable to the cable hole; the female terminal The rear end has a female end cable connecting portion, and the female end cable connecting portion has a cable hole and a screw hole, and a fixing bolt is mounted on the screw hole for clamping the cable core clamp Close to the cable hole.

Another object of the present invention is to provide a solar power connector that can be quickly inserted and removed. In one embodiment, the side wall of the coupling opening of the female end insulating body has a fastening hole, and the insertion portion of the male end insulating body The middle portion has an annular rib, and the insertion portion is divided into a front portion and a rear portion by an annular rib. The annular rib has a plurality of elastic buckles extending toward the direction of the stopper piece, and the elastic buckle has a The engaging block protruding toward the side direction is inserted and coupled with the coupling portion of the male connector and the coupling port of the female connector, and the engaging block of the elastic buckle can just be engaged by the elastic force of the elastic buckle The snap-in hole of the coupling port makes the coupling portion of the male connector and the coupling connector of the female connector temporarily unable to be separated, as long as the engaging block of the elastic buckle is pushed in and out at the position of the fastening hole. With the hole, the plug of the male connector can be pulled out from the coupling port of the female connector.

A further object of the present invention is to provide a solar electrical connector that can tighten a cable to prevent cable looseness. In one embodiment, the inner side wall of the front section of the cable tube has internal threads for connection to the female insulating body. The external thread of the portion is screwed, the outer surface of the rear portion of the cable tube has an external thread, and the end of the cable tube also has a plurality of wire gripping claws, and the wire pulling claws are distributed at an equal circumferential position of the rear portion of the beam tube. There is a gap between any two adjacent beam claws, and the beam claw is a kind of beam line An elongated member extending in the axial rearward direction of the tube and gradually coming closer to the axial direction, the cable can pass through the cable tie and be surrounded between the cable grippers, and the tightening nut can be screwed to the rear of the cable guide The external thread, the tail end of the tightening nut has an inlet hole through which the cable can be inserted, and the inner wall surface of the rear section of the tightening nut is tapered toward the inlet hole to form an approximately conical contraction surface. After the tightening nut is screwed to the external thread of the rear portion of the beam tube, the wire clamping claw can be pushed toward the cable by the contracting surface, and the cable is clamped by the wire clamping claw to prevent the cable from being loosened. efficacy.

Compared with the prior art, this creation has the advantages and effects as described below:

(1) After the plug connector of the male connector and the coupling port of the female connector are plugged and coupled to each other, the front portion and the coupling port of the plug portion may be closely adhered to each other to form a first waterproof and airtight structure, and The airtight tube and the airtight chamber which are closely adhered to each other form a second waterproof airtight structure, and in addition, the two adjacent male terminals can be prevented by the barrier of the partition plate and the crotch portion, and any two adjacent ones An electric arc or spark is generated between the female terminals. .

(2) The male terminal of the male connector clamps the core wire of the cable to the cable hole by a fixing bolt; the female terminal of the female connector is also fixed by a fixing bolt The core wire of the cable is clamped to the cable hole, so the solar electrical connector and cable can be easily disassembled.

(3) The male connector and the female connector of the solar connector can be quickly inserted and removed.

(4) With the cable tie and the tightening nut, the cable can be clamped to prevent the cable from loosening.

Other functions and embodiments of the present invention will be described below in conjunction with the drawings.

An embodiment of the present solar electric connector is constructed as shown in FIG. 1 and includes a female connector 10 and a male connector 60.

The female connector 10 includes a female insulating body 20, a plurality of female terminals 30, a bundle of conduits 40 and a tightening nut 50; please refer to "2-1" to "2-4" The female end insulating body 20 is an electrical insulating member which can be made of a plastic material. The female insulating body 20 is divided in its axial direction into a coupling portion 21 at a position in the axial direction and a position in the axial rear portion. In the connecting portion 22, the inside of the female insulating body 20 has a plurality of female terminals penetrating the connecting portion 22 and the coupling portion 21 in the axial direction. The coupling portion 21 has a coupling port 211 having an opening facing forward and hollow. The inside of the coupling port 211 has a plurality of tubular airtight tubes 24 respectively communicating with a corresponding female terminal hole 23, and these airtight tubes 24 are connected. The connecting portion 22 extends toward the coupling portion 21, and has a fastening hole 212 penetrating the side wall at the side wall of the coupling opening 211. The outer surface of the connecting portion 22 has an external thread 221; the female terminal of the female connector 10 The front end of the recess 30 has a receptacle 31 having a plurality of slits 311 located at equal circumferential positions around the receptacle 31, and a plurality of resilient coupling claws 32 are formed around the receptacle 31, in another implementation of the present invention. In the example, the inner side wall surface of the coupling claw 32 has a plurality of toothed barbs 321 (see "Fig. 3"), and the middle portion of the female terminal 30 has a plurality of annular check hooks 33, and the rear end of the female terminal 30 has A female cable connecting portion 34 having a relatively large outer diameter, the female cable connecting portion 34 has a cable hole 341 and a screw hole 342 which is along the radial direction of the female cable connecting portion 34 and The cable hole 342 is connected, and a fixing bolt 35 is mounted on the screw hole 342 for clamping the core wire of the cable C to The wire hole 342 (see "3"), the female terminal 30 is inserted into the female terminal hole 23 from the direction of the connecting portion 22 toward the coupling portion 21, and the female terminal cable 23 can block the female end cable near an inlet end of the connecting portion 22. The wire connecting portion 34, the retaining hook 33 of the female terminal 30 can be caught in the hole wall of the female terminal hole 23 to prevent the female terminal 30 from being bent by the female terminal hole 23. In the middle, the insertion hole 31 of the front end of the female terminal 30 can extend into the airtight tube 24 inside the coupling portion 21.

The end surface of the connecting portion 22 of the female insulating body 20 has a plurality of separating plates 25 extending radially from the center of the connecting portion 22 in a radial direction, and a female terminal is disposed between any two adjacent insulating plates 25. The hole 23 further has a crotch portion 251 protruding toward the adjacent one of the partition plates 25 at the end of the partition plate 25 extending in the radiation direction, and the distance between any two adjacent female terminals 30 is required to be related to each other. The provisions of the safety regulations, on the other hand, can prevent arcing or sparking between any two adjacent female terminals 30 by the barrier of the spacer 25 and the jaws 251.

Please refer to "Fig. 4-1" to "Fig. 4-2". The cable tube 40 is an axially penetrating tubular member. The cable tube 40 is also an electrical insulating member which can be made of a plastic material. The inner side wall of the front section of 40 has an internal thread 41 (see "Fig. 5"), and can be screwed with the external thread 221 of the connecting portion 22 of the female insulating body 20, and the outer surface of the rear section of the cable tube 40 has an external thread. 42. The tail end of the cable tube 40 further has a plurality of wire gripping claws 43. The wire gripping claws 43 are distributed at equal circumferential positions of the rear portion of the cable tube 40, and there is one between any two adjacent wire pulling claws 43. The gap 431, the wire gripper 43 is an axial rear section facing the beamline 40 The elongated member that extends in the direction and gradually approaches the axial direction, the cable C can pass through the wire tube 40 and be surrounded between the wire gripping claws 43 (as shown in "Fig. 6").

Referring to FIG. 6, the tightening nut 50 can be screwed to the external thread 42 of the rear section of the cable tube 40. The end of the tightening nut 50 has an inlet hole 51 for the cable C to be inserted into the hole. By tightening the nut 50 and then passing through the aforementioned cable tube 40, the core wire of the cable C and the female end cable connecting portion 34 of the female terminal 30 are finally joined together, and the inner wall surface of the rear portion of the nut 50 is tightened. The direction of the entrance hole 51 is tapered to form an approximately conical contraction surface 52 (see FIG. 6). After the tightening nut 50 is screwed to the external thread 42 of the rear section of the beam tube 40, The contraction surface 52 pushes the wire gripper 43 in the direction of the cable C, and the cable C is clamped by the wire gripper 43 to prevent the cable C from coming loose.

As shown in FIG. 1, the male connector 60 includes a male insulating body 70, a nut 80 and a plurality of male terminals 90.

Please refer to "Fig. 7-1" to "Fig. 7-4". The male insulating body 70 is an electrical insulating member which can be made of a plastic material. The male insulating body 70 is a hollow element in the axial direction. The middle end of the male insulating body 70 has an annular stop piece 71, and the male end insulating body 70 is a stop piece 71. The outer surface of the mounting portion 73 has an external thread 731, and the nut 80 can be screwed to the external thread 731 for mounting the male connector 60 for the front portion of the plug portion 72 and the rear portion of the mounting portion 73. Passing through a mounting hole (not shown) of the panel of the solar photovoltaic device, the nut 80 can clamp the panel of the solar photovoltaic device together with the stopper piece 71 for mounting the male connector 60 to the solar photovoltaic device. a mounting hole of the panel of the device; the male insulating body 70 has a plurality of male terminal holes 74 extending through the plug portion 72 and the mounting portion 73 in the axial direction, and the plurality of male terminals 90 are respectively inserted into the corresponding male terminals The holes 74 may have different numbers of male terminal holes 74 depending on the solar electrical connectors of different specifications or uses. One embodiment shown in FIG. 1 is a solar electric connection having five male terminal holes 74. Another embodiment of "10th" and "11th" is a solar electric connector having three male terminal holes 74 and three female terminal holes 23; the front end of the male terminal 90 has a The middle section of the pin 91 has several rings The retaining hook 92 has a male end cable connecting portion 93 having a relatively large outer diameter at the rear end of the male terminal 90. The male end cable connecting portion 93 has a cable hole 931 and a screw hole 932. The screw hole 932 is along the screw hole 932. The radial direction of the male cable connecting portion 93 communicates with the cable hole 931, and a fixing bolt 94 is attached to the screw hole 932 for connecting the core of the cable C. Clamped in the cable hole 931 (see FIG. 8), the male terminal 90 is inserted into the male terminal hole 74 from the mounting portion 73 toward the insertion portion 72, and the male terminal hole 74 is adjacent to an inlet of the mounting portion 73. The end end blocks the male end cable connecting portion 93, and the retaining hook 92 of the male terminal 90 can be caught in the hole wall of the male terminal hole 74 to prevent the male terminal 90 from being loosened from the male terminal hole 74, and the front end of the male terminal 90 is The pin 91 can extend into an airtight chamber 721 inside the insertion portion 72, and a gap d is formed between the pin 91 and the wall surface of the airtight chamber 721 (see "8th drawing"); the end surface of the mounting portion 73 has the mounting portion 73. a plurality of spacers 75 extending in a radial direction along a radial direction, a male terminal hole 74 is disposed between any two adjacent spacers 75, and an end of the spacer 75 extending toward the radiation direction is further provided. The shank 751 protruding toward the adjacent one of the partition plates 75, the distance between any two adjacent male terminals 90 is required to comply with the relevant safety regulations, and on the other hand, the partition plate 75 and the dam portion The blocking of 751 prevents arcing or sparking between any two adjacent male terminals 90.

The insertion portion 72 can be inserted into the coupling opening 211 of the female end insulating body 20 of the female connector 10. The intermediate portion of the insertion portion 72 has an annular rib 76, and the insertion portion 72 is divided into a ring rib 76. The front end portion 77 and the rear end portion 78 are inserted into the female end insulating body of the female end connector 10 in an airtight relationship. The coupling port 211 of the 20, at the same time, the airtight tube 24 in the coupling port 211 of the female insulating body 20 is inserted into the airtight chamber 721 in a gastight relationship, and the pin 91 of the male terminal 90 is simultaneously inserted into the jack of the female terminal 30. 31, after the plug portion 72 of the male connector 60 and the coupling port 211 of the female connector 10 are plugged and coupled to each other, the plug portion 72 and the coupling port 211 can be closely adhered to each other to form a first waterproof gas. In addition, the airtight tube 24 and the airtight chamber 721 which are closely adhered to each other form a second waterproof airtight structure (see "Fig. 9").

In an embodiment of the present invention, the outer diameter surface of the front section 77 has a plurality of guide grooves 771 at equal circumferential positions, and the inner side wall of the coupling opening 211 is provided with a guide rail 213 that can be fitted with the guide groove 771 (see "2-3"), the plug portion 72 for guiding the male connector 60 and the coupling port 211 of the female connector 10 are properly plug-coupled, and the annular fin 76 has a plurality of facing tabs. The elastic buckle 761 extending in the direction of the 71 has an engaging block 762 protruding toward the side direction, and the plug portion 72 of the male connector 60 and the coupling port 211 of the female connector 10 are connected to each other. After the coupling, the engaging block 762 of the elastic clasp 761 can be engaged with the engaging hole 212 of the coupling port 211 by the elastic force of the elastic clasp 761, so that the plug portion 72 and the female end connector of the male end connector 60 are connected. The coupling port 211 of 10 is temporarily unable to be separated, as long as the elastic buckle 761 is placed at the position of the fastening hole 212. The engaging portion 762 is pushed inwardly away from the engaging hole 212, so that the insertion portion 72 of the male connector 60 can be pulled out from the coupling port 211 of the female connector 10.

Although the present invention has been disclosed above through the above embodiments, it is not intended to limit the creation of the present invention. Anyone skilled in the art can make some changes and refinements without departing from the spirit and scope of the present creation. The scope of patent protection is subject to the terms of the claims attached to this specification.

C‧‧‧ cable

10‧‧‧Female connector

20‧‧‧Female insulated body

21‧‧‧Coupling Department

211‧‧‧ coupling port

212‧‧‧Closed hole

213‧‧‧rails

22‧‧‧Connecting Department

23‧‧‧Female terminal hole

221‧‧‧ external thread

24‧‧‧ airtight tube

25‧‧‧Isolation board

251‧‧‧檐

30‧‧‧Female terminal

31‧‧‧ jack

311‧‧‧ crack

32‧‧‧ coupling claw

D‧‧‧ gap

50‧‧‧ tightening nut

51‧‧‧Incoming hole

52‧‧‧Contraction surface

60‧‧‧ male connector

70‧‧‧Male insulated body

71‧‧‧stop film

72‧‧‧Interface

721‧‧‧Intensive room

73‧‧‧Installation Department

731‧‧‧ external thread

74‧‧‧ Male terminal hole

75‧‧‧Isolation board

751‧‧‧檐

76‧‧‧ annular ribs

761‧‧‧elastic buckle

762‧‧‧卡合块

321‧‧‧ Barb

33‧‧‧Check back

34‧‧‧Female cable connection

341‧‧‧ cable hole

342‧‧‧ screw holes

35‧‧‧ fixing bolt

40‧‧‧Bundle tube

41‧‧‧ internal thread

42‧‧‧ external thread

43‧‧‧Bundle claw

431‧‧‧ gap

77‧‧‧The former section

771‧‧‧Three guiding channels

78‧‧‧The last section

80‧‧‧ nuts

90‧‧‧ male terminal

91‧‧‧pins

92‧‧‧Check back

93‧‧‧ Male cable connection

931‧‧‧ cable hole

932‧‧‧ screw holes

94‧‧‧ fixing bolts

Fig. 1 is a structural view showing an embodiment of the present invention, showing an exploded view of the female connector and the male connector.

Figure 2-1 is a structural view of an embodiment of the female connector showing a front view of the female connector.

Fig. 2-2 is a plan view of the structure of Fig. 2-1.

Figure 2-3 is a left side view of the structure of Figure 2-1.

Figure 2-4 is a right side view of the structure of Figure 2-1.

Fig. 3 is a cross-sectional view showing the structure of Fig. 2-2 at the position III-III.

Fig. 4-1 is a structural view showing an embodiment of a wire harness showing a front view of the wire harness.

Figure 4-2 is a right side view of the structure of Figure 4-1.

Fig. 5 is a cross-sectional view showing the structure of Fig. 4-1 at the V-V position.

Fig. 6 is a structural view showing an embodiment of a female connector showing a structural sectional view of the female connector.

Figure 7-1 is a structural view of an embodiment of a male connector showing a front view of the male connector.

Fig. 7-2 is a top view of the structure of Fig. 7-1.

Figure 7-3 is a left side view of the structure of Figure 7-1.

Figure 7-4 is a right side view of the structure of Figure 7-1.

Figure 8 is a cross-sectional view of the structure at positions VIII-VIII in Figures 7-2.

Fig. 9 is a structural view showing an embodiment of the present invention, showing a structural sectional view of the female connector and the male connector being coupled to each other.

Figure 10 is a configuration diagram of another embodiment of a female connector showing a female connector construction having three female terminal holes.

Figure 11 is a configuration diagram of another embodiment of a male connector showing a male connector construction having three male terminal holes.

10‧‧‧Female connector

20‧‧‧Female insulated body

21‧‧‧Coupling Department

211‧‧‧ coupling port

212‧‧‧Closed hole

22‧‧‧Connecting Department

221‧‧‧ external thread

24‧‧‧ airtight tube

25‧‧‧Isolation board

251‧‧‧檐

30‧‧‧Female terminal

31‧‧‧ jack

311‧‧‧ crack

32‧‧‧ coupling claw

33‧‧‧Check back

51‧‧‧Incoming hole

60‧‧‧ male connector

70‧‧‧Male insulated body

71‧‧‧stop film

72‧‧‧Interface

721‧‧‧Intensive room

73‧‧‧Installation Department

731‧‧‧ external thread

75‧‧‧Isolation board

751‧‧‧檐

76‧‧‧ annular ribs

761‧‧‧elastic buckle

762‧‧‧卡合块

77‧‧‧The former section

771‧‧‧Three guiding channels

34‧‧‧Female cable connection

342‧‧‧ screw holes

35‧‧‧ fixing bolt

40‧‧‧Bundle tube

42‧‧‧ external thread

43‧‧‧Bundle claw

431‧‧‧ gap

50‧‧‧ tightening nut

78‧‧‧The last section

80‧‧‧ nuts

90‧‧‧ male terminal

91‧‧‧pins

92‧‧‧Check back

93‧‧‧ Male cable connection

932‧‧‧ screw holes

94‧‧‧ fixing bolts

Claims (5)

A solar electrical connector comprising: a female end connector having a female end insulating body, a plurality of female terminals, a bundle of conduits and a tightening nut; the female end insulating body having a coupling portion at the front end position and located a connecting portion of the rear portion, the coupling portion has a coupling port, the coupling port has a plurality of airtight tubes inside, and the inner portion of the female insulating body has a connecting portion and the coupling portion in the axial direction a plurality of female terminal holes, the front end of the female terminal has a socket, the socket of the female terminal can extend into the airtight tube inside the coupling portion, and has a radiation-like extension at an end surface of the connecting portion a plurality of spacers, wherein the female terminal holes are disposed between any two adjacent ones of the spacers, and the ends of the spacers extending toward the radiation direction further have a direction protruding toward the adjacent one of the spacers a connecting portion, the cable tube can be screwed to the connecting portion, the cable tube has a plurality of wire gripping claws, and the wire pulling claws are pushed by the tightening nut to tighten the cable; The end connector has a male insulating body, a nut and a number a male terminal; the male end insulating body has a plug portion at the front portion and a mounting portion at the rear portion, the inside of the plug portion has an airtight chamber, and the inside of the male end insulating body has the insertion through the plug in the axial direction a joint and a plurality of male terminals of the mounting portion a hole, a pin of the front end of the male terminal may extend into the airtight chamber inside the plug portion, and a gap is formed between the pin and the wall surface of the airtight chamber, the plug portion has a front portion and a rear portion The front portion can be inserted into the coupling port of the female end insulating body in an airtight relationship, and the airtight tube in the coupling port of the female end insulating body is inserted into the airtight chamber in a close relationship, and The pin of the male terminal is simultaneously inserted into the socket of the female terminal, and the end surface of the mounting portion has a plurality of spacers extending in a radial shape, and the two adjacent ones of the spacers are disposed between the spacers The male terminal hole further has a weir portion protruding toward the adjacent one of the spacers at an end of the spacer extending in the radiation direction. The solar electric connector of claim 1, wherein the male terminal has a male end cable connecting portion at the rear end, the male end cable connecting portion has a cable hole and a screw hole, the screw The hole screw has a fixing bolt for clamping the core wire of the cable to the cable hole. The solar electrical connector of claim 1, wherein the female terminal has a female end cable connecting portion, the female end cable connecting portion has a cable hole and a screw hole, the screw The hole screw has a fixing bolt for clamping the core wire of the cable to the cable hole. The solar electric connector of claim 1, wherein the female end is absolutely The side wall of the coupling port of the edge body has a fastening hole, and the middle portion of the insertion portion of the male end insulation body has an annular rib, and the insertion portion is divided into a front portion and a boundary by the annular rib. a rear end portion, the annular rib has a plurality of elastic cleats extending toward the mounting portion, and the elastic cleats have a snapping block protruding toward the side direction, the plug portion of the male end connector and After the coupling ports of the female connector are coupled to each other, the engaging portion of the elastic buckle can be engaged with the fastening hole of the coupling port by the elastic force of the elastic buckle. The solar electric connector according to claim 1, wherein an outer surface of the rear portion of the cable tube has an external thread, and a tail end of the cable tube has a plurality of wire gripping claws, and the bundle claws are distributed. At an equally divided circumferential position of the rear portion of the beam tube, there is a gap between any two adjacent bundle claws, the bundle claw being a direction extending toward the axial rear section of the beam tube and gradually toward the shaft a strip-shaped member that is close to the center of the heart, the cable can pass through the wire tube and be surrounded between the wire gripping claws, and the tightening nut can be screwed to the external thread of the rear portion of the wire harness, The tail end of the tightening nut has an inlet hole through which the cable is inserted, and an inner wall surface of the rear section of the tightening nut is tapered toward the inlet hole to form an approximately conical surface After the tightening nut is screwed to the external thread of the rear portion of the wire tube, the wire clamping claw can be pushed toward the cable by the shrinking surface.