JP2024054496A - connector - Google Patents

Abstract

To provide a connector capable of improving assembly workability.SOLUTION: A connector 1 includes: a bus bar 10 having a housing HS, a first plate-like part 10f housed in the housing, and an apparatus connection part 10c exposed from the housing; and a terminal 20 having an electric connection part 21 and housed in the housing. The first plate-like part has a bus bar penetration hole 12, the electric connection part has a terminal penetration hole 25, and the protrusion part 11 is formed on the principal plane of one of the first plate-like part and the electric connection part. A recessed notch is formed on an end part of the other of the first plate-like part and the electric connection part. The first plate-like part and the electric connection part are coupled by a bolt inserted into the bus bar penetration hole and the terminal penetration hole while the protrusion part is housed in the notch and brought into contact with an inner peripheral surface of the notch in a state in which the bus bar penetration hole and the terminal penetration hole are in a communicating positional relation.SELECTED DRAWING: Figure 4

Description

The present invention relates to a connector.

Conventionally, there are connectors in which the bus bar and the terminal are fastened by bolts inside the housing. In the case of such connectors, in the process of assembling the connector, the bus bar and the terminal are fastened by bolts while the positioning of the bus bar and the terminal and the rotation of the terminal are fixed by a jig. For example, Patent Document 1 discloses a configuration in which, in a shielded connector, a flat bus bar and a flat terminal are stacked so that the bolt holes of the bus bar and the bolt holes of the flat terminal are connected, and then bolts are inserted into the respective bolt holes and fastened together to connect the bus bar and the flat terminal.

JP 2003-317821 A

In the process of connecting a flat bus bar and a flat terminal as in Patent Document 1, a jig is used to position the flat terminal relative to the bus bar and to restrict the rotation of the flat terminal relative to the bus bar. In the process of connecting a bus bar and a flat terminal, a jig is required to fix the flat bus bar and the flat terminal, which increases the number of manufacturing steps for the parts and increases manufacturing costs. For this reason, it is desirable to improve the ease of assembly of connectors.

The present invention was made in consideration of the above circumstances, and aims to provide a connector that can improve assembly workability.

The connector of the present invention comprises a housing, a bus bar having a flat first plate-shaped portion accommodated in the housing and an equipment connection portion exposed from the housing and electrically connected to a mating device, and a terminal having a flat electrical connection portion and an electrical wire connection portion attached to an end of an electrical wire and accommodated in the housing, the first plate-shaped portion has a bus bar through hole penetrating the first plate-shaped portion, the electrical connection portion has a terminal through hole penetrating the electrical connection portion, a protrusion is formed on one main surface of the first plate-shaped portion or the electrical connection portion, and a concave notch is formed on the other end of the first plate-shaped portion or the electrical connection portion, the first plate-shaped portion and the electrical connection portion are in a positional relationship in which the bus bar through hole and the terminal through hole are connected, the protrusion is accommodated in the notch and abuts against the inner peripheral surface of the notch, and the first plate-shaped portion and the electrical connection portion are fastened by a bolt inserted through the bus bar through hole and the terminal through hole.

The connector of the present invention has the effect of improving the ease of assembly.

FIG. 1 is a perspective view showing a connector according to an embodiment. FIG. 2 is a perspective view showing the bus bar according to the embodiment. FIG. 3 is a perspective view showing a terminal of the embodiment. FIG. 4 is a top view showing a fixing structure between a bus bar and a terminal in the embodiment. FIG. 5 is a perspective view illustrating a first plate-shaped portion of a bus bar according to the embodiment. FIG. 6 is a perspective view showing a fixing structure between a bus bar and a terminal in the embodiment. FIG. 7 is a perspective view showing a rear surface of the first plate-shaped portion of the embodiment.

The connector according to the embodiment of the present invention will be described in detail below with reference to the drawings. Note that the present invention is not limited to this embodiment. The components in the following embodiment include those that a person skilled in the art would easily imagine or that are substantially the same.

[Embodiment]
An embodiment will be described with reference to Fig. 1 to Fig. 7. The embodiment relates to a connector. Fig. 1 is a perspective view showing a connector according to the embodiment, Fig. 2 is a perspective view showing a busbar of the embodiment, Fig. 3 is a perspective view showing a terminal of the embodiment, Fig. 4 is a top view showing a fixing structure between the busbar and the terminal in the embodiment, Fig. 5 is a perspective view showing a first plate-shaped portion of the busbar in the embodiment, Fig. 6 is a perspective view showing a fixing structure between the busbar and the terminal in the embodiment, and Fig. 7 is a perspective view showing a back surface of the first plate-shaped portion in the embodiment.

The connector 1 according to the embodiment is incorporated into a wire harness mounted on a vehicle such as an automobile. Here, the wire harness, for example, connects between various devices mounted on the vehicle, and is an assembly component formed by bundling multiple electric wires W used for power supply and signal communication. The wire harness is configured to connect the multiple electric wires W to each device using connectors, etc.

As shown in FIG. 1, the connector 1 according to the embodiment includes a housing HS, a bus bar 10, and terminals 20 (see FIG. 3). The housing HS is molded from an insulating synthetic resin. The housing HS includes a housing portion 31, a cover member 32, and a front holder 33. The bus bar 10 and the terminals 20 are housed within the housing HS, and a portion of the bus bar 10 (the device connection portion 10c described below) protrudes from within the housing HS toward the outside of the housing HS.

In this embodiment, the connector 1 includes two bus bars 10 and two terminals 20. Two bus bars 10 and two terminals 20 are accommodated in the housing HS of the connector 1. Within the housing HS, the bus bars 10 and the terminals 20 are electrically connected in a one-to-one relationship. Each of the terminals 20 is attached to the end of an electric wire W (electric wires W1 and W2).

In the following description, the first direction X is the extension direction of each electric wire W. The second direction Y is a direction perpendicular to the first direction X, and corresponds to the direction in which the connector 1 is attached to and detached from the mating device. The third direction Z is a direction perpendicular to the first direction X and the second direction Y, and corresponds to the direction in which the two electric wires W are adjacent to each other. In the first direction X, the direction from the housing HS toward the electric wire W side is the device direction X1, and the opposite direction from the direction from the housing HS toward the electric wire W side is the tip direction X2 of the connector 1. In the second direction Y, the direction in which the connector 1 is attached to the mating device is the attachment direction Y1, and the direction in which the connector 1 is removed from the mating device is the removal direction Y2. Furthermore, one side of the third direction Z is the upward direction Z1, and the other side is the downward direction Z2.

The housing HS has an accommodating section 31 that accommodates the busbar 10 and the terminal 20. The accommodating section 31 includes a first terminal accommodating section 31a, a second terminal accommodating section 31b, a busbar accommodating section 31c, and a connecting section 31d. The first terminal accommodating section 31a and the second terminal accommodating section 31b are each formed in a cylindrical shape extending in the first direction X. The first terminal accommodating section 31a and the second terminal accommodating section 31b accommodate the terminal 20 attached to the end of the electric wire W in their respective internal spaces. The first terminal accommodating section 31a and the second terminal accommodating section 31b are adjacent to each other in the third direction Z, and the first terminal accommodating section 31a is disposed on the upper direction Z1 side relative to the second terminal accommodating section 31b. In the embodiment, the first terminal accommodating section 31a accommodates the terminal 20 attached to the end of the electric wire W1 in its internal space, and the second terminal accommodating section 31b accommodates the terminal 20 attached to the end of the electric wire W2 in its internal space. In the first terminal housing 31a and the second terminal housing 31b, the electric wire W is drawn out from the end on the device direction X1 side. In addition, in the first terminal housing 31a and the second terminal housing 31b, the end on the tip direction X2 side of the connector 1 is connected to the bus bar housing 31c.

The busbar accommodating portion 31c is a portion that accommodates two busbars 10 in its internal space. The internal space of the busbar accommodating portion 31c is connected to the internal spaces of the first terminal accommodating portion 31a and the second terminal accommodating portion 31b. The busbar accommodating portion 31c is formed in a box shape that is open on the mounting direction Y1 side in the second direction Y, and the first terminal accommodating portion 31a and the second terminal accommodating portion 31b are each connected to the side wall of the busbar accommodating portion 31c on the device direction X1 side.

The cover member 32 is a plate-shaped member that covers the opening of the busbar accommodating portion 31c. An opening is formed in the cover member 32. The opening of the cover member 32 is formed so as to penetrate the cover member 32 in the second direction Y. The opening of the cover member 32 is located slightly upward in the Z1 direction from the center of the cover member 32 in the third direction Z. A portion of each of the two busbars 10 protrudes into the external space through the opening of the cover member 32.

The front holder 33 is a lid-like member attached to the cover member 32 so as to cover the opening of the cover member 32, and is formed to fit with a mating connector of a mating device. The front holder 33 has two openings aligned in the first direction X, and a portion of each of the two bus bars 10 protrudes from the corresponding opening of the front holder 33 toward the outside of the housing HS. A packing 34 is attached around the front holder 33. The packing 34 is formed to improve the waterproof performance of the connector 1 by coming into close contact between the front holder 33 and the mating connector when the front holder 33 is mated with the mating connector.

The connector 1 of the embodiment is a so-called shielded connector, and further includes a shield shell 32. The shield shell 32 is formed of a conductive material such as metal. The shield shell 32 is a member that covers the housing HS and is fixed to the housing of the counterpart device. The shield shell 32 is electrically connected to the housing of the counterpart device.

The shield shell 32 is a box-shaped member that opens toward the mating device, and houses the housing HS inside the opening. In other words, the shield shell 32 covers the housing HS from the removal direction Y2 side, and the part of the housing HS that faces the mating device is exposed from the shield shell 32. In addition, there is no wall on the device direction X1 side of the shield shell 32, and an electric wire insertion section that is an opening for passing the electric wire W drawn out from the housing section 31 is formed.

2 shows the busbar 10 held in the housing HS. Of the two busbars 10 shown in FIG. 1, FIG. 2 shows the busbar 10 protruding from the opening on the tip direction X2 side of the front holder 33. The busbar 10 shown in FIG. 2 is the busbar 10 electrically connected to the terminal 20 accommodated in the second terminal accommodating portion 31b. As shown in FIG. 2, the busbar 10 has a first plate-shaped portion 10f, a second plate-shaped portion 10s, a third plate-shaped portion 10t, a first bent portion 10q, and a second bent portion 10p. The first plate-shaped portion 10f, the second plate-shaped portion 10s, the third plate-shaped portion 10t, the first bent portion 10q, and the second bent portion 10p are each formed in a flat plate shape. The busbar 10 is molded from a conductive material such as metal. The busbar 10 of the embodiment is formed into a predetermined shape, for example, by bending or drilling a single metal plate as a base material.

The first plate-shaped portion 10f is a portion that is fastened to the electrical connection portion 21 (see FIG. 3) of the terminal 10 by a bolt. The first plate-shaped portion 10f is arranged in the housing HS so that the second direction Y is the plate thickness direction, and extends along the first direction X. In the first direction X, a busbar through hole 12 that penetrates the first plate-shaped portion 10f in the second direction Y is formed at the end (end on the device direction X1 side) of the first plate-shaped portion 10f that is closer to the electric wire W (see FIG. 1). The end (tip direction X2 side) of the first plate-shaped portion 10f that is farther from the electric wire W (see FIG. 1) is connected to the first bent portion 10q. A protrusion 11 is formed on the main surface of the first plate-shaped portion 10f. The protrusion 11 is arranged on the first bent portion 10q side than the busbar through hole 12.

The first bent portion 10q is arranged in the housing HS so that the second direction Y is the plate thickness direction, and is bent so that the end opposite the end connected to the first plate-shaped portion 10f faces the upward direction Z1. The end of the first bent portion 10q opposite the end connected to the first plate-shaped portion 10f is connected to the second plate-shaped portion 10s.

The second plate-shaped portion 10s is disposed within the housing HS such that the second direction Y is the plate thickness direction, and extends along the third direction Z. The end of the second plate-shaped portion 10s opposite the end connected to the first bent portion 10q is connected to the second bent portion 10p. The second bent portion 10q is bent so that the end opposite the end connected to the second plate-shaped portion 10s faces the mounting direction Y1. The end of the second bent portion 10q opposite the end connected to the second plate-shaped portion 10s is connected to the third plate-shaped portion 10t.

The third plate-shaped portion 10t is arranged in the housing HS so that the third direction Z is the plate thickness direction, and extends from the second bent portion 10q toward the mounting direction Y1 side. The third plate-shaped portion 10t has an equipment connection portion 10c. The equipment connection portion 10c is an end portion of the third plate-shaped portion 10t on the mounting direction Y1 side, a portion that protrudes from the opening of the front holder 33 to the outside of the housing HS, and is a portion that is electrically connected to the counterpart device (see FIG. 1). The equipment connection portion 10c has a through hole 13 that penetrates the third plate-shaped portion 10t in the third direction Z. The through hole 13 is used to connect with the counterpart connector of the counterpart device. For example, the connector 1 and the counterpart device are electrically connected by inserting a bolt into the through hole 13 and a through hole of the connection portion of the counterpart connector and fastening them.

Of the two busbars 10 shown in FIG. 1, the busbar 10 on the equipment direction X1 side has a different length of the first plate-shaped portion 10f in the first direction X and a different length of the second plate-shaped portion 10s in the third direction Z from the busbar 10 on the tip direction X2 side (the busbar 10 shown in FIG. 2), but the other configurations are substantially the same as the busbar 10 on the tip direction X2 side. In the busbar 10 on the equipment direction X1 side, the length of the first plate-shaped portion 10f in the first direction X and the length of the second plate-shaped portion 10s in the third direction Z are set to lengths that position the equipment connection portion 10c in a position that protrudes from the opening in the front holder 33.

In the embodiment, the busbar 10 on the device direction X1 side has a shorter distance from the terminal 20 to the opening in the front holder 33 than the busbar 10 on the tip direction X2 side, so the length of the first plate-shaped portion 10f in the first direction X and the length of the second plate-shaped portion 10s in the third direction Z are set shorter than those of the busbar 10 on the tip direction X2 side. Note that in the busbar 10 on the device direction X1 side, if the second plate-shaped portion 10s is not necessary to position the device connection portion 10c at a position protruding from the opening in the front holder 33, the first bent portion 10q and the second plate-shaped portion 10s may be omitted. In this case, the second bent portion 10q is connected to the end of the first plate-shaped portion 10f in the upward direction Z.

The terminal 20 of the embodiment is a crimp terminal that is crimped to the end of the electric wire W. FIG. 3 shows the terminal 20 before crimping. As shown in FIG. 3, the terminal 20 has an electrical connection portion 21, an electric wire connection portion 22, and a connecting portion 23. The terminals 20 accommodated in the first terminal accommodating portion 31a and the second terminal accommodating portion 31b are formed to have substantially the same size and shape as each other.

The electrical connection portion 21 is a portion that is electrically and physically connected to the first plate-shaped portion 10f. The electrical connection portion 21 is formed in a flat plate shape. The electrical connection portion 21 has a terminal through hole 25 that penetrates the electrical connection portion 21 in the second direction Y. In the embodiment, the terminal through hole 25 is formed in the center of the main surface of the electrical connection portion 21. The shape and size of the terminal through hole 25 are substantially the same as those of the busbar through hole 12. In addition, a concave notch 24 is formed in the end portion of the electrical connection portion 21 opposite the end portion on the electric wire connection portion 22 side (the end portion on the tip direction X2 side).

The wire connection portion 22 is a portion that electrically connects the end of the electric wire W to the terminal 20. The wire connection portion 22 has a bottom portion 22a, a first barrel piece portion 22b, and a second barrel piece portion 22c. At the end of the electric wire W, the insulating coating is stripped off, and the core wire is exposed. In the terminal 20 before crimping, the wire connection portion 22 is formed in a U-shape. The first barrel piece portion 22b and the second barrel piece portion 22c are portions that become the side walls of the wire connection portion 22 in the state before crimping. The first barrel piece portion 22b extends from one end of the bottom portion 22a in the third direction Z toward the mounting direction Y1. The second barrel piece portion 22c extends from the other end of the bottom portion 22a in the third direction Z toward the mounting direction Y1.

The electric wire connection portion 22 is crimped to the end of the electric wire W by wrapping the first barrel piece 22b and the second barrel piece 22c around the end of the electric wire W and tightening it, with the end of the electric wire W being placed in the space surrounded by the bottom portion 22a, the first barrel piece 22b, and the second barrel piece 22c.

The connecting portion 23 is interposed between the electrical connection portion 21 and the electric wire connection portion 22, and connects and conducts the electrical connection portion 21 and the electric wire connection portion 22. In the terminal 20, the electrical connection portion 21 and the electric wire connection portion 22 are electrically connected via the connecting portion 23, and the electrical connection portion 21 is electrically connected to the core wire of the electric wire W via the electric wire connection portion 22, and conducts.

As shown in FIG. 4, the first plate-shaped portion 10f and the electrical connection portion 21 are overlapped in the second direction Y so that the busbar through holes 12 and the terminal through holes 25 are in communication with each other. The first plate-shaped portion 10f is disposed on the removal direction Y2 side with respect to the electrical connection portion 21 (see FIG. 6). As shown in FIG. 4, the first plate-shaped portion 10f and the electrical connection portion 21 are configured so that the protrusion 11 is accommodated in the cutout portion 24 in a positional relationship in which the busbar through holes 12 and the terminal through holes 25 are in communication with each other.

When the protrusion 11 is housed in the notch 24, the protrusion 11 is in contact with the inner peripheral surface of the notch 24. In the connector 1 according to the embodiment, the protrusion 11 abuts against the inner peripheral surface of the notch 24, so that the terminal 20 can be positioned relative to the busbar 10 without using a jig when assembling the busbar 10 and the terminal 20. Furthermore, the protrusion 11 abuts against the inner peripheral surface of the notch 24, so that the terminal 20 can be prevented from rotating relative to the busbar 10. With this configuration, the busbar 10 and the terminal 20 can be fixed without using a jig, so that the fastening work with the bolts can be performed smoothly.

In the connector 1 according to the embodiment, in the housing HS, the first plate-shaped portion 10f and the electrical connection portion 21 are in a positional relationship in which the busbar through hole 12 and the terminal through hole 25 are in communication with each other, the protrusion 11 is accommodated in the notch 24 and abuts against the inner peripheral surface of the notch 24, and is fastened by a bolt inserted into the busbar through hole 12 and the terminal through hole 25. For example, the bolt inserted into the busbar through hole 12 and the terminal through hole 25 is inserted into a nut or the like and screwed to fasten the busbar through hole 12 and the terminal through hole 25. Also, a screw hole may be provided in the housing HS instead of a nut. In this case, the screw hole is formed in the housing HS at a position corresponding to the bolt inserted into the busbar through hole 12 and the terminal through hole 25. The busbar through hole 12 and the terminal through hole 25 are fastened by inserting a bolt into the screw hole and screwing it.

As shown in FIG. 5, the protrusion 11 of the busbar 10 is formed so that the protrusion height in the second direction Y increases toward the device direction X1 side. The upper surface of the protrusion 11 in the second direction Y (the surface on the mounting direction Y1 side) is a rectangular inclined surface when viewed from the mounting direction Y1 side, and is inclined so that the protrusion height of the protrusion 11 in the second direction Y gradually increases from the tip direction X2 of the connector 1 to the device direction X1. The protrusion 11 is formed in a shape corresponding to the concave cutout 24, and has a first abutment surface 11a, a second abutment surface 11b, and a third abutment surface 11c that abut against the inner surface of the cutout 24.

In the protrusion 11, the first abutment surface 11a is a side wall surface on the busbar through hole 12 side in the first direction X. The abutment surface 11a is erected along the second direction Y. The first abutment surface 11a has a planar shape along the second direction Y and the third direction Z. As shown in Figures 5 and 6, when the busbar through hole 12 and the terminal through hole 25 are in a positional relationship in which they communicate with each other, the first abutment surface 11a abuts against the inner surface of the cutout portion 24 in the first direction X. The first abutment surface 11a abuts against the first inner surface 24a, which is the inner surface of the cutout portion 24 on the device direction X1 side.

In the protrusion 11, the second abutment surface 11b is a side wall surface on the upward Z1 side in the third direction Z. The second abutment surface 11b is erected along the second direction Y. The second abutment surface 11b has a planar shape along the first direction X and the second direction Y. As shown in Figures 5 and 6, when the busbar through hole 12 and the terminal through hole 25 are in a positional relationship in which they communicate with each other, the second abutment surface 11b abuts against the inner surface of the cutout portion 24 in the second direction Y. The second abutment surface 11b abuts against the second inner surface 24b, which is the inner surface on the upward Z1 side of the cutout portion 24.

In the protrusion 11, the third abutment surface 11c is a side wall on the downward direction Z2 side in the third direction Z. The third abutment surface 11c is erected along the second direction Y. The third abutment surface 11c has a planar shape along the first direction X and the second direction Y. As shown in Figures 5 and 6, when the busbar through hole 12 and the terminal through hole 25 are in a positional relationship in which they communicate with each other, the third abutment surface 11c abuts against the inner surface of the cutout portion 24 in the second direction Y. The third abutment surface 11c abuts against the third inner surface 24c, which is the inner surface of the cutout portion 24 on the downward direction Z2 side.

In the embodiment, the protrusion 11 is formed by pressing a portion of the first plate-shaped portion 10f from the back side to the front side. As shown in FIG. 7, a recess corresponding to the shape of the protrusion 11 is formed on the back side of the first plate-shaped portion 10f.

In the above embodiment, an example has been described in which the first plate-shaped portion 10f of the busbar 10 has a protrusion 11 and the electrical connection portion 21 of the terminal 20 has a notch 24, but this is not limiting. For example, the first plate-shaped portion 10f of the busbar 10 may have a notch 24, and the electrical connection portion 21 of the terminal 20 may have a protrusion 11.

As described above, the connector 1 according to the embodiment includes a housing HS, a bus bar 10 having a flat first plate-shaped portion 10f accommodated in the housing HS, and an equipment connection portion 10c exposed from the housing HS and electrically connected to a mating device, and a terminal 20 accommodated in the housing HS, the terminal 20 having a flat electrical connection portion 21 and an electric wire connection portion 22 attached to the end of an electric wire, the first plate-shaped portion 10f having a bus bar through hole 12 penetrating the first plate-shaped portion 10f, and the electric connection portion 21 having a terminal 22 penetrating the electric connection portion 21. The first plate-shaped portion 10f and the electrical connection portion 21 have a terminal through hole 25, a protrusion 11 is formed on one main surface of the first plate-shaped portion 10f or the electrical connection portion 21, and a concave notch 24 is formed on the other end of the first plate-shaped portion 10f or the electrical connection portion 21. The first plate-shaped portion 10f and the electrical connection portion 21 are in a positional relationship in which the busbar through hole 12 and the terminal through hole 25 are connected, and the protrusion 11 is accommodated in the notch 24 and abuts against the inner surface of the notch 24, and are fastened by a bolt inserted into the busbar through hole 12 and the terminal through hole 25.

In the connector 1 according to the embodiment, the protrusion 11 and the notch 24 can prevent the relative positions of the busbar through hole 12 and the terminal through hole 25 from shifting when the first plate-shaped portion 10f and the electrical connection portion 21 are fastened with a bolt. In other words, the terminal 20 can be positioned and prevented from rotating relative to the busbar 10 without using a jig. Since the terminal 20 can be positioned and prevented from rotating without using a jig, the number of steps required to fasten the busbar 10 and the terminal 20 with a bolt when assembling the connector 1 can be reduced, improving the ease of assembly. In addition, since a jig is not required, work such as designing the jig can be omitted. Furthermore, the manufacturing cost of the connector can be reduced. Furthermore, the fact that positioning and prevention of rotation can be easily achieved by simply butting the protrusion 11 into the notch 24 also contributes to improving the ease of assembly.

The contents disclosed in the above embodiments can be implemented in appropriate combinations.

1: Connector, 10: Bus bar, 10c: Device connection portion 10c, 10f: First plate portion 10s: Second plate portion, 10t: Third plate portion, 11: Projection portion, 12: Bus bar through hole, 20: Terminal, 21: Electrical connection portion, 22: Electric wire connection portion, 24: Notch portion 25: Terminal through hole, HS: Housing

Claims (1)

Housing and
a bus bar including a flat first plate-shaped portion accommodated in the housing and a device connection portion exposed from the housing and electrically connected to a counterpart device;
a terminal having a flat electrical connection portion and an electric wire connection portion attached to an end of an electric wire and accommodated in the housing;
Equipped with
the first plate-shaped portion has a bus bar through hole penetrating the first plate-shaped portion,
the electrical connection portion has a terminal through-hole penetrating the electrical connection portion,
a protrusion is formed on one of the main surfaces of the first plate-shaped portion or the electrical connection portion,
a recessed cutout portion is formed in the other end portion of the first plate-shaped portion or the electrical connection portion,
a first plate-shaped portion and an electrical connection portion that are fastened together by a bolt inserted into the busbar through hole and the terminal through hole, the first plate-shaped portion and the electrical connection portion being positioned so that the busbar through hole and the terminal through hole are connected to each other, the protrusion being accommodated within the notch and abutting against an inner surface of the notch, and the first plate-shaped portion and the electrical connection portion being fastened together by a bolt inserted into the busbar through hole and the terminal through hole.

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