Electric connection component

Abstract

To make it to be preferably to adaptation for a mating.SOLUTION: An electric connection component comprises: an electric wire with a terminal 120 having an electric wire 121, a first terminal metal fitting 130, and a second terminal metal fitting 140; a main housing 150; and an attachment housing 160. The main housing includes a first housing bonding part 153 to which an attachment housing formed in each combination of an arrangement place of a wiring route of the electric wire and the second terminal metal fitting is selectively assembled. The attachment housing includes: a conductive member housing chamber 161 that houses the electric wire with the terminal, and projects the first terminal metal fitting to an outside; and a second housing bonding part 164 that is assembled to the first housing bonding part. The conductive member housing chamber is formed in a guide shape that guides the electric wire led from the first terminal metal fitting to the arrangement place of the second terminal metal fitting along the wiring route, and includes a terminal holding part 162 that holds the second terminal metal fitting at the arrangement place.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electrical connection component. [Background technology]

[0002] An electrical connection part is a part such as a connector or a terminal block that is interposed between at least two electrical connection objects and electrically connects the two electrical connection objects. The electrical connection part includes an electric wire, terminal fittings connected to both ends of the electric wire, and a housing that accommodates them. Here, the electrical connection part is adapted to the electrical connection object according to the structure and arrangement of the counterpart electrical connection object, for example, by changing the terminal fittings to correspond to the connection method with the counterpart terminal fittings, or by changing the route of the electric wire to correspond to the connection direction of the terminal fittings to the counterpart terminal fittings. In the conventional electrical connection part, the attachment structure is divided into a common member that can be shared among various electrical connection objects and an attachment member for each of the various electrical connection objects, and it can be easily adapted to various electrical connection objects. For example, this type of electrical connection part is disclosed in the following Patent Documents 1 to 3. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-086767 [Patent Document 2] JP 2016-225260 A [Patent Document 3] JP 2019-212521 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional electrical connection parts have room for improvement in terms of adaptability to mating electrical connection objects.

[0005] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide an electrical connection part that is suitable for application to a mating device. [Means for solving the problem]

[0006] The present invention comprises an electric wire with a terminal, the electric wire having a first terminal fitting physically and electrically connected to one end of the electric wire, and a second terminal fitting physically and electrically connected to the other end of the electric wire, a main housing, and an attachment housing that accommodates the electric wire with a terminal and is assembled to the main housing to accommodate the first terminal fitting protruding outward in the main housing, the main housing having a first housing joint to which the attachment housing, which is formed for each combination of a wiring path of the electric wire and a location for arranging the second terminal fitting, is selectively assembled, the attachment housing having a conductive member accommodating chamber that accommodates the electric wire with a terminal and causes the first terminal fitting to protrude outward, and a second housing joint that is assembled to the first housing joint, the conductive member accommodating chamber being formed in a guide shape that guides the electric wire drawn out from the first terminal fitting along the wiring path to the location for arranging the second terminal fitting, and having a terminal holding portion that holds the second terminal fitting at the location. Effect of the Invention

[0007] The electrical connection part of the present invention can improve its adaptability to a variety of electrical connection objects by selecting an attachment housing according to the structure and arrangement of the mating electrical connection object and assembling this selected attachment housing to the main housing. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an electrical connection part according to an embodiment, which is divided into a first electrical connection part and a second electrical connection part before being mated and connected. FIG. [Diagram 2] FIG. 2 is a perspective view showing the electrical connection parts (first and second electrical connection parts after fitting and connection) of the embodiment. [Diagram 3] FIG. 3 is an exploded perspective view showing the first electrical connection part. [Figure 4] FIG. 4 is an exploded perspective view showing the second electrical connection part. [Diagram 5] FIG. 5 is an exploded perspective view illustrating the main housing and the inner housing. [Figure 6] FIG. 6 is a perspective view showing the first attachment housing. [Figure 7] FIG. 7 is a perspective view showing a second electrical connection part combined with a second attachment housing. [Figure 8] FIG. 8 is a perspective view showing the second electrical connection part combined with the second attachment housing. [Figure 9] FIG. 9 is a perspective view showing a modified mounting form of the first attachment housing to the main housing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electrical connection part according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to the embodiment.

[0010] [Embodiment] One embodiment of an electrical connection part according to the present invention will be described with reference to FIGS.

[0011] 1 and 2, reference numeral 1 denotes an electrical connection part of the present embodiment. The electrical connection part 1 is a part such as a connector or a terminal block that is interposed between at least two electrical connection objects (not shown) and electrically connects the two electrical connection objects.

[0012] The electrical connection part 1 shown here is interposed between an inverter and a motor as electrical connection objects, and electrically connects the inverter and the motor. The electrical connection part 1 is roughly divided into a part (hereinafter referred to as a "first electrical connection part") 10 that is electrically connected to the inverter, and a part (hereinafter referred to as a "second electrical connection part") 110 that is electrically connected to the motor (FIGS. 1 and 2). The electrical connection part 1 electrically connects the inverter and the motor by fitting and connecting the first electrical connection part 10 on the inverter side and the second electrical connection part 110 on the motor side, and physically and electrically connecting them to each other. Note that the electrical connection part 1 may be one that electrically connects the first electrical connection part 10 to the motor, and electrically connects the second electrical connection part 110 to the inverter.

[0013] The first electrical connection part 10 includes a terminal fitting 20 and a housing 30 that receives and holds the terminal fitting 20 (FIGS. 1 and 3).

[0014] The terminal fitting 20 is made of a conductive material such as metal. The terminal fitting 20 is a male terminal fitting having a flat terminal connection portion (hereinafter referred to as a "screw-fastened connection portion") 21 that is fastened together with a mating terminal fitting Ti on the inverter side by a screw-fastening structure using a female screw member 41 and a male screw member 42, and a columnar or cylindrical terminal connection portion (hereinafter referred to as a "male terminal connection portion") 22 that is electrically connected to the second electrical connection part 110 (FIGS. 1 to 3).

[0015] The housing 30 is molded from an insulating material such as synthetic resin. The housing 30 has a terminal accommodating chamber 31 that accommodates and holds the terminal fitting 20, and a female screw holding portion 32 that holds a female screw member 41 that is arranged adjacent to the screw-fastened connection portion 21 of the terminal fitting 20 and coaxially with the through hole of the screw-fastened connection portion 21 (FIGS. 1 and 3). The housing 30 is molded by pouring a liquid synthetic resin material into a mold in which the terminal fitting 20 and the like are placed, and then hardening the synthetic resin material. FIG. 3 shows the terminal fitting 20 before it is insert-molded. Meanwhile, the female screw member 41 is press-fitted and fixed into the female screw holding portion 32.

[0016] The first electric connection part 10 shown here has three terminal fittings 20, and a terminal accommodating chamber 31 and a female screw holding portion 32 for each terminal fitting 20 are provided in the housing 30 (FIG. 3). In the housing 30, the three sets of terminal accommodating chambers 31 and female screw holding portions 32 are arranged in a row. The first electric connection part 10 has an annular packing 51 for each terminal fitting 20 through which the screw-fastened connection portion 21 is inserted, and a packing holder 52 for each packing 51 that holds the packing 51 (FIG. 3). The packing 51 ensures that the first electric connection part 10 is waterproof and oil-proof on the screw-fastened connection portion 21 side. The first electric connection part 10 also has an annular packing 53 that surrounds the three terminal accommodating chambers 31 on the joint surface of the housing 30 with the second electric connection part 110 (FIG. 3). The first electrical connection part 10 ensures waterproof and oil-proof properties between itself and the second electrical connection part 110 by means of the packing 53 .

[0017] The second electrical connection part 110 comprises an electric wire with terminal 120 having an electric wire 121, a first terminal fitting 130 physically and electrically connected to one end of the electric wire 121, and a second terminal fitting 140 physically and electrically connected to the other end of the electric wire 121, a main housing 150, and an attachment housing 160 that accommodates the electric wire with terminal 120 and is assembled to the main housing 150 so that the first terminal fitting 130 protruding outward is accommodated in the main housing 150 (Figures 1, 2 and 4).

[0018] The electric wire 121 is not limited to one having at least a core wire and a coating, but may be, for example, a braided electric wire in which metal wires are braided into a mesh-like cylindrical shape. In this example, a braided electric wire is used as the electric wire 121.

[0019] The first terminal fitting 130 is made of a conductive material such as metal. The first terminal fitting 130 has a cylindrical terminal connection portion (hereinafter referred to as a "female terminal connection portion") 131 into which the mating male terminal connection portion 22 is fitted, and an electric wire connection portion 132 that physically and electrically connects one end of the electric wire 121 (FIG. 4).

[0020] The electric wire connecting portion 132 shown here has a pair of barrel pieces crimped to one end of the electric wire 121, allowing the electric wire 121 to be drawn out. In this first terminal fitting 130, the electric wire 121 is drawn out from the electric wire connecting portion 132 coaxially with the cylindrical axis of the female terminal connecting portion 131 or on an axis parallel to the cylindrical axis of the female terminal connecting portion 131.

[0021] The second terminal fitting 140 has a flat terminal connection portion (hereinafter referred to as the "screw-fastened connection portion") 141 that is fastened together with a mating terminal fitting Tm on the motor side by a screw-fastening structure consisting of a female screw member 171 and a male screw member 172, and an electric wire connection portion 142 that physically and electrically connects the other end of the electric wire 121 placed on a mounting surface continuous with the first flat surface 141a of this terminal connection portion 141 (Figures 1, 2 and 4).

[0022] The terminal connection portion 141 is formed with a male screw insertion hole 141c, which is a through hole that penetrates in the plate thickness direction between the first plane 141a side and the second plane 141b side on the back side of the first plane 141a, and through which the male screw member 172 is inserted (Figure 4).

[0023] The electric wire connecting portion 142 shown here has a pair of barrel pieces crimped to the other end of the electric wire 121, allowing the electric wire 121 to be drawn out. In this second terminal fitting 140, the electric wire 121 is drawn out from the electric wire connecting portion 142 in a direction perpendicular to the axis of the male screw insertion hole 141c.

[0024] The second electrical connection part 110 shown here includes three of these terminal-equipped electric wires 120 (FIGS. 1, 2, and 4).

[0025] The main housing 150 and the attachment housing 160 are molded from an insulating material such as synthetic resin. In the second electrical connection part 110, the terminal-attached electric wire 120 is accommodated in the attachment housing 160, and the first terminal fitting 130 protruding out of the attachment housing 160 is accommodated in the main housing 150. More specifically, the second electrical connection part 110 includes an inner housing 180 that accommodates and holds the first terminal fitting 130 (FIGS. 1, 4, and 5). The second electrical connection part 110 accommodates the inner housing 180 in the main housing 150, and accommodates the first terminal fitting 130 in the main housing 150 via the inner housing 180. The inner housing 180 is molded from an insulating material such as synthetic resin.

[0026] The inner housing 180 has a fitting portion 181 that receives and holds the female terminal connecting portion 131 of the first terminal fitting 130 and is fitted and connected to a mating fitting portion (here, the mating terminal accommodating chamber 31) (FIGS. 1 and 5). The fitting portion 181 is formed in a cylindrical shape, and the cylindrical axis direction corresponds to the insertion / removal direction with respect to the mating fitting portion. The mating male terminal connecting portion 22 is fitted into the female terminal connecting portion 131 of the first terminal fitting 130 by fitting and connecting the fitting portion 181 and the terminal accommodating chamber 31. The inner housing 180 also has a pair of engagement portions 182 that are arranged opposite to each other with the electric wire connecting portion 132 of the first terminal fitting 130 therebetween and engage with the main housing 150 (FIG. 5).

[0027] The main housing 150 has a housing accommodating chamber 151 that accommodates and holds the inner housing 180 (FIGS. 4 and 5). A pair of engaging portions 182 are accommodated in the housing accommodating chamber 151 together with the electric wire connecting portion 132 and one end of the electric wire 121. The housing accommodating chamber 151 is surrounded by a cylindrical wall that allows the electric wire 121 to be drawn out of the chamber from an opening at one end and allows the fitting portion 181 to protrude out of the chamber from an opening at the other end. In the inner housing 180, the fitting portion 181 protrudes out of the housing accommodating chamber 151 and is fitted and connected to the mating terminal accommodating chamber 31.

[0028] The second electric connection part 110 has a housing holding structure that holds the inner housing 180 on the main housing 150 in the housing accommodation chamber 151. This housing holding structure has a locking portion 152 for each of the engaging portions 182 that protrudes from the inner wall surface of the housing accommodation chamber 151 that is arranged to face the engaging portion 182, and a locked portion 183 that protrudes from each of the engaging portions 182 and is locked to the locking portion 152 in the housing accommodation chamber 151 (FIG. 5). The locking portion 152 protrudes from each location on the inner wall surface of the housing accommodation chamber 151 that is arranged to face the pair of engaging portions 182. The locking portion 152 shown here is formed in a claw shape. Also, the locked portion 183 protrudes from each of the pair of engaging portions 182. The locked portion 183 shown here is formed in a flexible cantilever shape, and its free end is locked to the locking portion 152 in the housing accommodation chamber 151. The locking portion 152 and the locked portion 183 lock the movement of the inner housing 180 in the direction opposite to the insertion direction (one direction within the axial direction of the fitting portion 181) of the inner housing 180 into the housing accommodating chamber 151. The housing holding structure shown here is formed to allow relative movement (so-called play) of the inner housing 180 in the direction perpendicular to the insertion direction within the housing accommodating chamber 151 while maintaining the locked state of the locking portion 152 and the locked portion 183.

[0029] The second electrical connection part 110 shown here includes an inner housing 180 for each of the terminal-equipped electric wires 120 (FIGS. 1 and 4). The main housing 150 has a housing accommodating chamber 151 for each of the inner housings 180, and includes a housing holding structure for each of the housing accommodating chambers 151 (FIGS. 4 and 5).

[0030] The attachment housing 160 has a receiving chamber (hereinafter referred to as the "conductive member receiving chamber") 161 that receives the terminal-fitted electric wire 120 and allows the first terminal fitting 130 to protrude outward (FIGS. 1, 2, 4, and 6). The conductive member receiving chamber 161 is formed in a guide shape that guides the electric wire 121 drawn out from the first terminal fitting 130 along the wiring path to the location where the second terminal fitting 140 is arranged (i.e., the connection position with the mating terminal fitting Tm on the motor side).

[0031] The conductive member accommodating chamber 161 has a terminal holding portion 162 that holds the second terminal fitting 140 at its location, and a female screw holding portion 163 that holds the female screw member 171 by arranging it opposite to the first flat surface 141a of the terminal connecting portion 141 of the second terminal fitting 140 (FIGS. 1, 4, and 6). The terminal holding portion 162 is formed to hold the terminal connecting portion 141 of the second terminal fitting 140. The terminal holding portion 162 shown here holds the terminal connecting portion 141 in a state where the male screw insertion hole 141c is exposed by sliding and inserting both end side portions of the terminal connecting portion 141 to fit it. The female screw holding portion 163 holds the female screw member 171 by aligning the screw axis coaxially with the hole axis of the male screw insertion hole 141c. The female screw holding portion 163 shown here holds the female screw member 171 by press-fitting it.

[0032] The attachment housing 160 shown here has a conductive member accommodating chamber 161 for each terminal-fitted electric wire 120 (FIGS. 1, 2, 4 and 6).

[0033] In the second electrical connection part 110, the first terminal fittings 130 protruding outward from the conductive member accommodating chambers 161 of the attachment housing 160 are assembled to the inner housing 180. In this second electrical connection part 110, the attachment housing 160 is fitted and connected to the main housing 150, so that the pair of engagement portions 182 of the inner housing 180 are accommodated in the housing accommodating chambers 151 of the main housing 150 together with the electric wire connecting portions 132 of the first terminal fittings 130 and one end of the electric wire 121.

[0034] Here, in the second electric connection part 110, the wiring path of the electric wire 121 and the arrangement location of the second terminal fitting 140 change depending on the structure and arrangement of the counterpart electric connection object (here, a motor). Therefore, in this second electric connection part 110, the main housing 150 is provided as a common member, and the attachment housing 160 is formed for each combination of the wiring path of the electric wire 121 and the arrangement location of the second terminal fitting 140. In other words, the attachment housing 160 is prepared for each combination of the wiring path of the electric wire 121 and the arrangement location of the second terminal fitting 140, and the attachment housing 160 selected according to the combination is assembled to the main housing 150. Therefore, the conductive member accommodating chamber 161 is formed in a shape that matches the combination of the wiring path of the electric wire 121 and the arrangement location of the second terminal fitting 140. The terminal holding portion 162 and the female screw holding portion 163 have the same shape regardless of the type of the attachment housing 160.

[0035] As described above, the attachment housing 160 is selectively assembled to the main housing 150 for each combination of the routing path of the electric wire 121 and the location of the second terminal fitting 140. Therefore, the main housing 150 has a first housing joint 153 to which the attachment housing 160 for each combination is selectively assembled (FIG. 4). The attachment housing 160 has a second housing joint 164 to be assembled to the first housing joint 153 (FIG. 6).

[0036] In the main housing 150 shown here, one angular cylindrical outer peripheral wall 154 is divided into three angular tubes by two partition walls, and three housing accommodating chambers 151 surrounded by the cylindrical walls of the divided angular tubes are arranged side by side (FIG. 4). In this main housing 150, an angular annular end portion at one end of the outer peripheral wall 154 is used as a first housing joint 153 (FIG. 4). Then, in the attachment housing 160, an angular annular groove portion is formed into which the first housing joint portion 153 of the angular annular protrusion is fitted, and this groove portion is used as a second housing joint portion 164 (FIG. 6). The second housing joint portion 164 has the same shape regardless of the type of attachment housing 160.

[0037] The following describes specific application examples of the second electrical connection part 110. Here, three types of attachment housings 160 are given as examples: a first attachment housing 160A, a second attachment housing 160B, and a third attachment housing 160C (FIGS. 1, 2, 4, and 6 to 8).

[0038] As described above, the shapes of the conductive member accommodating chambers 161 are different between the first attachment housing 160A, the second attachment housing 160B, and the third attachment housing 160C. The conductive member accommodating chambers 161A of the first attachment housing 160A are formed to route the electric wires 121 drawn out from the first terminal fittings 130 linearly along the drawing direction (FIGS. 1, 2, 4, and 6). The conductive member accommodating chambers 161B of the second attachment housing 160B and the conductive member accommodating chambers 161C of the third attachment housing 160C are each formed to route the electric wires 121 drawn out from the first terminal fittings 130 by bending them midway (FIGS. 7 and 8). Specifically, the conductive member accommodating chamber 161B of the second attachment housing 160B has a second housing groove bottom 165B for bending and guiding the electric wire 121 drawn out from the first terminal fitting 130, and is formed in a groove shape for arranging the second terminal fitting 140 with the mounting surface of the electric wire connecting portion 142 facing the second housing groove bottom 165B (FIG. 7). On the other hand, the conductive member accommodating chamber 161C of the third attachment housing 160C has a third housing groove bottom 165C for bending and guiding the electric wire 121 drawn out from the first terminal fitting 130 in the opposite direction to the conductive member accommodating chamber 161B of the second attachment housing 160B, and is formed in a groove shape for arranging the second terminal fitting 140 with the mounting surface of the electric wire connecting portion 142 facing the third housing groove bottom 165C (FIG. 8).

[0039] In this second electrical connection part 110, any one of the first attachment housing 160A, the second attachment housing 160B, and the third attachment housing 160C can be assembled to the main housing 150. FIGS. 1, 2, and 4 show the second electrical connection part 110 in which the first attachment housing 160A is combined with the main housing 150. FIG. 7 shows the second electrical connection part 110 in which the second attachment housing 160B is combined with the main housing 150. FIG. 8 shows the second electrical connection part 110 in which the third attachment housing 160C is combined with the main housing 150.

[0040] In the second electrical connection part 110, the first attachment housing 160A can be used in the following two assembly configurations. To this end, the second housing joint 164 of the first attachment housing 160A is formed so as to be able to be assembled to the first housing joint 153 in a first assembly state (FIGS. 1 and 2), and is also formed so as to be able to be assembled to the first housing joint 153 in a second assembly state (FIG. 9) in which the first attachment housing 160A in the first assembly state is rotated 180 degrees around the cylindrical axis of the female terminal connection portion 131. The first attachment housing 160A is assembled to the main housing 150 by rotating the first attachment housing 160A in the first assembly state 180 degrees around the cylindrical axis of the female terminal connection portion 131 of the middle first terminal fitting 130 among the female terminal connection portions 131 of the three first terminal fittings 130 arranged in a row. Here, the first housing joint 153, which is an angular annular protrusion, and the second housing joint 164, which is an angular annular groove, are fitted together, so that the first attachment housing 160A can be rotated 180 degrees around the cylindrical axis of the female terminal connection portion 131 and assembled to the main housing 150.

[0041] Here, the second housing joint 164 of the second attachment housing 160B and the third attachment housing 160C is also formed in the same shape as the second housing joint 164 of the first attachment housing 160A. Therefore, in this second electrical connection part 110, the second attachment housing 160B can also be rotated 180 degrees around the cylindrical axis of the female terminal connection part 131 and assembled to the main housing 150 (not shown). And, in this second electrical connection part 110, the third attachment housing 160C can also be rotated 180 degrees around the cylindrical axis of the female terminal connection part 131 and assembled to the main housing 150 (not shown).

[0042] In this second electrical connection part 110, the main housing 150 and the attachment housing 160 (first attachment housing 160A, second attachment housing 160B, third attachment housing 160C) are selectively combined in this manner. Then, in the electrical connection part 1, the second electrical connection part 110 is fitted and connected to the first electrical connection part 10.

[0043] As described above, the electrical connection part 1 (second electrical connection part 110) of this embodiment can improve adaptability to a variety of electrical connection objects by selecting an attachment housing 160 (first attachment housing 160A, second attachment housing 160B, third attachment housing 160C) according to the structure and arrangement of the mating electrical connection object (here, a motor) and assembling the selected attachment housing 160 to the main housing 150. [Explanation of symbols]

[0044] 1 Electrical connection parts 22 Male terminal connection part 110 Second electrical connection part 120 Wire with terminal 121 Electric wire 130 First terminal fitting 131 Female terminal connection 140 Second terminal fitting 141 Terminal connection part 141a 1st plane 141b 2nd plane 141c Male screw insertion hole 142 Wire connection 150 Main Housing 151 Housing Containment Room 153 First housing joint 160 Attachment Housing 160A 1st Attachment Housing 160B 2nd Attachment Housing 160C 3rd Attachment Housing 161, 161A, 161B, 161C Conductive material housing 162 Terminal holding part 164 Second housing joint 165B Second housing groove bottom 165C 3rd housing groove bottom 171 Female screw member 172 Male screw member Tm Mating terminal fitting

Claims

1. an electric wire with a terminal, the electric wire including: an electric wire; a first terminal fitting physically and electrically connected to one end of the electric wire; and a second terminal fitting physically and electrically connected to the other end of the electric wire; The main housing and an attachment housing that houses the electric wire with terminal and is assembled to the main housing so that the first terminal fitting protruding outward is housed in the main housing; Equipped with the main housing has a first housing joint portion to which the attachment housing, which is formed for each combination of the wiring path of the electric wire and the arrangement location of the second terminal metal fitting, is selectively assembled; the attachment housing has a conductive member accommodating chamber that accommodates the electric wire with terminal and allows the first terminal metal fitting to project outwardly, and a second housing joint portion that is assembled to the first housing joint portion, the conductive material accommodating chamber is formed in a guide shape that guides the electric wire pulled out from the first terminal fitting along the wiring path to the arrangement location of the second terminal fitting, and has a terminal holding portion that holds the second terminal fitting at the arrangement location.

2. a first attachment housing is assembled to the main housing as the attachment housing; 2. The electrical connection part according to claim 1, wherein the conductive member accommodating chamber of the first attachment housing linearly routes the electric wire drawn from the first terminal fitting along the direction in which the electric wire is drawn out.

3. a second attachment housing is assembled to the main housing as the attachment housing; 2. The electrical connection part according to claim 1, wherein the electric wire drawn from the first terminal fitting is bent midway and routed in the conductive member accommodating chamber of the second attachment housing.

4. Any one of a first attachment housing, a second attachment housing, and a third attachment housing can be assembled to the main housing as the attachment housing; the second terminal fitting has a flat terminal connection portion which is fastened together with a mating terminal fitting by a screw fastening structure using a female screw member and a male screw member, and an electric wire connection portion which physically and electrically connects the other end of the electric wire placed on a placement surface which is continuous with a first flat surface of the terminal connection portion, The terminal connection portion is provided with a through hole extending in a plate thickness direction between the first flat surface side and the second flat surface side, the through hole being formed with a male screw insertion hole through which the male screw member is inserted, the conductive member accommodating chamber of the first attachment housing linearly arranges the electric wire drawn from the first terminal fitting along a drawing direction of the electric wire, the conductive member accommodating chamber of the second attachment housing has a second housing groove bottom for bending and guiding the electric wire drawn out from the first terminal fitting, and is formed in a groove shape for arranging the second terminal fitting with the placement surface of the electric wire connection portion facing the second housing groove bottom, 2. The electrical connection part according to claim 1, wherein the conductive material accommodating chamber of the third attachment housing has a third housing groove bottom that bends and guides the electric wire pulled out from the first terminal fitting in a direction opposite to that of the conductive material accommodating chamber of the second attachment housing, and is formed into a groove shape in which the second terminal fitting is positioned with the mounting surface of the electric wire connection portion facing toward the third housing groove bottom.

5. a first attachment housing is assembled to the main housing as the attachment housing; The first terminal fitting has a cylindrical female terminal connection portion into which a mating columnar or cylindrical male terminal connection portion is fitted, the conductive member accommodating chamber of the first attachment housing linearly arranges the electric wire drawn from the first terminal fitting along a drawing direction of the electric wire, 2. The electrical connection part according to claim 1, wherein the second housing joint of the first attachment housing is formed so as to be able to be assembled to the first housing joint in a first assembly state, and is formed so as to be able to be assembled to the first housing joint in a second assembly state in which the first attachment housing in the first assembly state is rotated 180 degrees around the cylindrical axis of the female terminal connection portion.

6. The first terminal fitting has a cylindrical female terminal connection portion into which a mating columnar or cylindrical male terminal connection portion is fitted, the second housing joint portion of the first attachment housing is formed so as to be able to be assembled to the first housing joint portion in a first assembly state, and is also formed so as to be able to be assembled to the first housing joint portion in a second assembly state in which the first attachment housing in the first assembly state is rotated 180 degrees around a cylindrical axis of the female terminal connection portion, 5. The electrical connection part according to claim 4, wherein the second housing joints of the second attachment housing and the third attachment housing are each formed in the same shape as the second housing joint of the first attachment housing.

Images