Electrical junction box

Abstract

To provide an electric connection box that can facilitate bonding processing by a bonder while arranging a plurality of chain terminals at a holder.SOLUTION: An electric connection box 1 comprises a holder 10 which has chain terminals 30 where a plurality of electronic components 20 can be attached arranged at a plurality of places, and an electric conductive component 40 which electrically connects two or more chain terminals 30. The plurality of chain terminals 30 each have a plurality of terminal parts 31 where the electronic components 20 can be attached, a connection part 32 which connects the plurality of terminal parts 31 successively, and an electric wire connection part 33 which can connect an electric wire 8. One chain terminal 30A which has the electric wire 8 connected to the electric wire connection part 33 and the other chain terminals 30B to 30D which have the electric wire 8 not connected to the electric wire connection parts 33, but electrically conductively connected to one chain terminal 30A through the electric conductive component 40 constitute a series of electric circuits.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an electrical junction box including a plurality of chained terminals, a holder in which the chained terminals are arranged, and a conductive component that electrically connects the two or more chained terminals to each other. [Background technology]

[0002] Conventionally, electrical junction boxes have been proposed that have a holder therein for accommodating electronic components such as relays and fuses, such as relay boxes mounted on vehicles (see, for example, Patent Document 1). In this type of electrical junction box, a bus bar built into the holder is generally connected to an electric wire connected to an external load such as an electrical component via an electronic component such as a relay. In other words, electronic components such as relays are attached (i.e., electrically connected) to bus bars arranged so as to be stretched throughout the holder, and electrical continuity is established between the bus bar and the electronic component. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-007425 Summary of the Invention [Problem to be solved by the invention]

[0004] Depending on the internal structure of an electrical junction box, power may be supplied to some or all of the electronic components directly from power supply wires and terminals without using bus bars. In this case, a chain terminal capable of attaching multiple electronic components may be used to facilitate the process of joining and bundling multiple electric wires with a bonder to connect such electric wires to an external power source such as a battery. However, due to reasons such as the difficulty of using a single chain terminal to accommodate a wide variety of product specifications, it may be necessary to actually place multiple chain terminals in a holder. In this case, multiple electric wires connected to the chain terminals must be bonded using a bonder. In other words, even if a chain terminal is used, the bonder process may still be necessary, and there is room for further simplification of the bonder process.

[0005] The present invention has been made in view of the above-mentioned circumstances, and its object is to provide an electrical junction box that can facilitate bonding processing with a bonder while arranging a plurality of chain terminals in a holder. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the electrical junction box according to the present invention comprises the following components [1] to [2]. 5 ] is a feature of the product. [1] An electrical connection box comprising: a holder in which chain terminals to which a plurality of electronic components can be attached are arranged at a plurality of locations; and a conductive component that electrically connects two or more of the chain terminals to each other; Each of the plurality of chain terminals is a plurality of terminal portions to which the electronic components can be attached, a connecting portion that connects the plurality of terminal portions in a series, and an electric wire connecting portion to which an electric wire can be connected, One of the chain terminals to which the electric wire is to be connected to the electric wire connection portion and another of the chain terminals to which the electric wire is not connected to the electric wire connection portion and which is electrically connected to the one of the chain terminals via the conductive component constitute a series of electric circuits. It must be an electrical junction box. [2] In the electrical connection box described in [1] above, The conductive component is a contact portion having a shape that can be electrically connected to the terminal portion of the chain terminal; It must be an electrical junction box. [3] In the electrical connection box described in [1] above, The plurality of chained terminals have a common structure. It must be an electrical junction box. [ 4 ] In the electrical connection box described in [1] above, The terminal portion of the chain terminal includes a pair of plate-shaped clamping pieces that are arranged such that end surfaces on one side in a plate thickness direction face each other and clamp the electronic component while elastically pressing the electronic component, The wire connection portion of the chain terminal includes a pair of plate-shaped crimping pieces, the end surfaces of which are arranged opposite to each other on one side in a plate thickness direction and which fix the wires by crimping. It must be an electrical junction box. [ 5 ] In the electrical connection box described in [1] above, The chained terminals arranged in the holder include: a first chained terminal in which the plurality of terminal portions are aligned in a first direction; a second chained terminal in which the plurality of terminal portions are aligned in the first direction and are disposed on one side of the first chained terminal in the first direction; a third chained terminal in which the plurality of terminal portions are aligned in the first direction and are disposed on one side of the first chained terminal in a second direction perpendicular to the first direction; and a fourth chained terminal in which the plurality of terminal portions are aligned in the first direction and are disposed on the one side of the second chained terminal in the second direction and are disposed on the one side of the third chained terminal in the first direction, the conductive component is connected to the terminal portion of the first chain terminal that is closest to one side in the first direction, the terminal portion of the second chain terminal that is closest to the other side in the first direction, the terminal portion of the third chain terminal that is closest to one side in the first direction, and the terminal portion of the fourth chain terminal that is closest to the other side in the first direction, the electric wire is connected to the electric wire connection portion of the first chain terminal, and the electric wire is not connected to the electric wire connection portion of each of the second chain terminal, the third chain terminal, and the fourth chain terminal; It must be an electrical junction box.

[0007] According to the electrical junction box having the configuration [1] above, multiple chained terminals are arranged in a holder, and two or more chained terminals (i.e., all or some of the multiple chained terminals) are electrically connected to each other using a conductive component. This forms a series of electrical circuits using the two or more chained terminals and the conductive component. Therefore, by connecting a power supply wire to the wire connection terminal of any one of the two or more electrically connected chained terminals, power is supplied to the other chained terminals via the conductive component, eliminating the need to connect wires to all of the chained terminals. In other words, the number of wires to be connected to the chained terminals can be reduced compared to when a conductive component is not used. As a result, bonding using a bonder can be simplified. For example, if all the chained terminals are electrically connected to each other using a conductive component, power can be supplied to all the chained terminals with only a single wire, completely eliminating the need for a bonding process. Using chained terminals instead of a conventional bus bar has the advantage of being more easily adaptable to various product specifications than a bus bar. Thus, the electrical junction box of this configuration facilitates bonding using a bonder while allowing multiple chained terminals to be arranged in a holder.

[0008] According to the electrical connection box of the configuration [2] above, the conductive component has a contact portion shaped to be conductively connected to the terminal portion of the chain terminal. Therefore, the terminal portion of the chain terminal, which is originally intended for attaching electronic components, can also be used for connecting to the conductive component. This simplifies the structure of the chain terminal compared to when the chain terminal is provided with a dedicated contact portion for connecting to the conductive component. Furthermore, using a general-purpose chain terminal can reduce manufacturing costs. [Effects of the Invention]

[0009] As described above, according to the present invention, it is possible to provide an electrical junction box that can facilitate bonding processing with a bonder while arranging a plurality of chain terminals in a holder.

[0010] The present invention has been briefly described above. The details of the present invention will become clearer by reading the detailed description of the invention below in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of an electrical junction box according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing a state in which various components are mounted on a holder housed inside the electrical junction box shown in FIG. [Figure 3] FIG. 3 is a perspective view showing a state in which some components are separated from the holder shown in FIG. [Figure 4] FIG. 4 is a perspective view showing only the metal portion of the conductive component shown in FIG. [Figure 5] 5 is a perspective view of the holder shown in FIG. 3 as viewed from the direction A in FIG. 2, showing some components inside the holder. [Figure 6] 6 is a perspective view of the holder shown in FIG. 2 as viewed from the direction A in FIG. 2, with some components inside the holder seen through. [Figure 7] FIG. 7 is a perspective view of a chain terminal. [Figure 8]8 is a perspective view of the holder shown in FIG. 3 as viewed from the direction indicated by B in FIG. 2, showing some components inside the holder. [Figure 9] 9 is a perspective view of the holder shown in FIG. 2 as viewed from the direction indicated by B in FIG. 2, with some components inside the holder seen through. [Figure 10] FIG. 10 is an electrical circuit diagram corresponding to the state in which various components are mounted on the holder as shown in FIG. [Figure 11] FIG. 11(a) is a perspective view of a conductive component according to a modified example, and FIG. 11(b) is a perspective view of a conductive component according to another modified example. DETAILED DESCRIPTION OF THE INVENTION

[0012] <Embodiment> Hereinafter, with reference to the drawings, an electric junction box 1 according to an embodiment of the present invention shown in Fig. 1 will be described. The electric junction box 1 is typically a relay box mounted on a vehicle and accommodating electronic components such as fuses and relays, as well as other components.

[0013] 1, the electrical junction box 1 is made up of a frame 2, a lower cover 3 attached to the bottom of the frame 2 so as to close the opening at the bottom end of the frame 2, and an upper cover 4 attached to the top of the frame 2 so as to close the opening at the top end of the frame 2. All three of the above components that make up the electrical junction box 1 are molded resin bodies.

[0014] In the electrical junction box 1, as shown in Fig. 1, electric wires 6 connected to some of the components located inside the electrical junction box 1 are led out to the outside of the electrical junction box 1 through electric wire outlet holes 5. Furthermore, electric wires 8, one end of which is connected to a chain terminal 30 (see Fig. 5, etc.) described below housed in a holder 10 (see Fig. 2) located inside the electrical junction box 1, are led out to the outside of the electrical junction box through electric wire outlet holes 7. The other end of the electric wire 8 is connected to a battery (not shown) mounted on the vehicle. One or more holders 10 are housed inside the electrical junction box 1.

[0015] The holder 10 will now be described. For ease of explanation, "front," "rear," "left," "right," "upper," and "lower" are defined as shown in Fig. 2 etc. The "front-rear direction," "left-right direction," and "up-down direction" are perpendicular to each other.

[0016] As shown in Figures 2 and 3, the holder 10 is a resin molded body having a substantially rectangular box shape. A plurality of (12 in total) storage sections 11 are formed on the top surface of the holder 10, with two storage sections 11 in the left-right direction and six storage sections 11 in the front-rear direction arranged in a matrix. Each storage section 11 is a substantially rectangular parallelepiped recess that is recessed downward and extends in the left-right direction. A fuse 20 (see Figure 3, etc.) is stored in the storage section 11 from above.

[0017] The fuse 20 has a shape that can be accommodated in the accommodation portion 11 of the holder 10. As shown in Fig. 3, the fuse 20 is composed of a pair of left and right flat terminal pieces 21, a fuse portion (not shown) that joins the pair of terminal pieces 21 so as to electrically connect them, and a resin portion 22 that is integrated (insert molded) with the pair of terminal pieces 21 and the fuse portion so as to partially cover the pair of terminal pieces 21 and the fuse portion. The fuse portion functions to cut off the electrical connection between the pair of terminal pieces 21 when a current that exceeds a predetermined rated current flows between the pair of terminal pieces 21.

[0018] For ease of explanation, the six housing sections 11 on the left and right sides and the fuses 20 housed therein will be referred to as the "inner side" and the "outer side," respectively, in the left-right direction, that are closer to the mating housing section 11. Furthermore, as shown in Figures 2 and 3, each of the three front housing sections 11 of the six housing sections 11 on the right side will be referred to as housing section 11A, each of the three rear housing sections 11 of the six housing sections 11 on the right side will be referred to as housing section 11B, each of the three front housing sections 11 of the six housing sections 11 on the left side will be referred to as housing section 11C, and each of the three rear housing sections 11 of the six housing sections 11 on the left side will be referred to as housing section 11D.

[0019] In the holder 10, an outer terminal accommodating chamber 12 (see FIGS. 8 and 9) is formed below the outer region of each of the multiple (12) accommodating portions 11 for accommodating an outer terminal 50 (see FIGS. 8 and 9) extending in the vertical direction. The corresponding accommodating portions 11 and the outer terminal accommodating chambers 12 are vertically connected to each other. Each outer terminal accommodating chamber 12 accommodates an outer terminal 50 from below. The upper end of the outer terminal 50 accommodated in the outer terminal accommodating chamber 12 is located in the outer region of the corresponding accommodating portion 11 and is electrically connected to the outer terminal piece 21 of the fuse 20 accommodated in that accommodating portion 11. An electric wire 9 connected to an external load such as an on-vehicle electrical component is connected to the lower end of the outer terminal 50. The electric wire 9 connected to the lower end of the outer terminal 50 extends downward and out of the holder 10 toward the electrical component, as shown in FIGS. 2 and 3 .

[0020] In the holder 10, chain terminal accommodating chambers 13 (see FIGS. 8 and 9) for accommodating vertically extending chain terminals 30 (see FIG. 7) are formed below the inner regions of the three accommodating portions 11A, 11B, 11C, and 11D, respectively. The three corresponding accommodating portions 11 and the chain terminal accommodating chambers 13 are vertically connected. Each chain terminal 30 is accommodated in the chain terminal accommodating chamber 13 from below. Hereinafter, the chain terminals 30 accommodated in the chain terminal accommodating chambers 13 corresponding to the three accommodating portions 11A, 11B, 11C, and 11D may be referred to as chain terminals 30A, 30B, 30C, and 30D, respectively.

[0021] As shown in Figure 7, the metal chain terminal 30 integrally includes three terminal portions 31 arranged in a line in the front-to-back direction corresponding to the three accommodating portions 11 and extending in the up-down direction, a connecting portion 32 connecting the lower ends of the three terminal portions 31 together, and a wire connecting portion 33 extending downward from the connecting portion 32.

[0022] In this example, each terminal portion 31 has a pair of clamping pieces arranged opposite each other in the front-rear direction. When the chain terminal 30 is accommodated in the chain terminal accommodating chamber 13, the upper end of each terminal portion 31 is located in the inner region of the corresponding accommodating section 11 and is electrically connected to the inner terminal piece 21 of the fuse 20 accommodated in that accommodating section 11. The outer terminal 50 also has similar clamping pieces and is adapted to be electrically connected to the outer terminal piece 21 of the fuse 20.

[0023] An electric wire 8 connected to a battery mounted on a vehicle is connected to the electric wire connection portion 33. In this example, as shown in Figures 5, 6, 8 and 9, among the chain terminals 30A to 30D, the electric wire 8 is connected only to the electric wire connection portion 33 of the chain terminal 30A, and the electric wire 8 is not connected to the electric wire connection portions 33 of the chain terminals 30B to 30D.

[0024] 2 and 3, a conductive part 40 is attached to the holder 10 and functions to electrically connect the chained terminals 30 to one another. As shown in Figs. 3 and 4, the conductive part 40 is made up of a metal part consisting of a rectangular flat plate part 41 extending in the left-right and front-rear directions and four terminal pieces 42 extending downward from the four corners of the flat plate part 41, and a resin part 43 that is integrated with the metal part so as to partially cover the metal part (for example, the metal part is insert-molded).

[0025] The distance in the front-to-rear direction between the two front terminal pieces 42 and the two rear terminal pieces 42 of the four terminal pieces 42 is equal to the distance in the front-to-rear direction between the housing sections 11 adjacent in the front-to-rear direction. The distance in the left-to-right direction between the two left terminal pieces 42 and the two right terminal pieces 42 of the four terminal pieces 42 is equal to the distance in the left-to-right direction between the inner terminal pieces 21 of the pair of fuses 20 housed in the pair of left-to-right housing sections 11. Furthermore, the shape of each of the two left terminal pieces 42 of the four terminal pieces 42 is the same as the shape of the inner terminal piece 21 of the fuse 20 housed in the left housing section 11 of the pair of left-to-right housing sections 11, and the shape of each of the two right terminal pieces 42 of the four terminal pieces 42 is the same as the shape of the inner terminal piece 21 of the fuse 20 housed in the right housing section 11 of the pair of left-to-right housing sections 11.

[0026] As described above, the conductive component 40 can be attached to the holder 10 by inserting the four terminal pieces 42 from above into the inner regions of any two pairs of left and right (four) housing sections 11 adjacent in the front-to-rear direction, as shown in Fig. 2. When the conductive component 40 is attached to the holder 10, each of the four terminal pieces 42 is electrically connected to the terminal portion 31 of the chained terminal 30 located in the corresponding housing section 11. In this way, the terminal portion 31 of the chained terminal 30, which is originally used to connect the terminal piece 21 of the fuse 20, is also used for connection to the conductive component 40.

[0027] 2, fuses 20 are housed in each of eight housing sections 11, namely, two of the three housing sections 11A other than the rear housing section 11A, two of the three housing sections 11B other than the front housing section 11B, two of the three housing sections 11C other than the rear housing section 11C, and two of the three housing sections 11D other than the front housing section 11D (a total of eight housing sections 11). Eight electric wires 9 connected to eight outer terminals 50 corresponding to the eight housing sections 11 housing fuses 20 extend to the outside of the holder 10. Of the chained terminals 30A to 30D, one electric wire 8 connected only to the chained terminal 30A extends to the outside of the holder 10.

[0028] Additionally, the conductive component 40 is attached to the holder 10 so that the four terminal pieces 42 are inserted into the inner regions of the four accommodating sections 11A, 11B, 11C, and 11D that do not accommodate the fuse 20 (see also FIGS. 6 and 9). Hereinafter, the terminal pieces 42 inserted into the four accommodating sections 11A, 11B, 11C, and 11D may be referred to as terminal pieces 42A, 42B, 42C, and 42D, respectively (see FIGS. 3 and 4).

[0029] In the state of the holder 10 shown in FIG. 2, all four chained terminals 30A, 30B, 30C, and 30D are electrically connected to one another by the conductive element 40, as shown in FIG. 10. As a result, one chained terminal 30A connected to an electric wire 8 and three chained terminals 30B, 30C, and 30D that are not connected to the electric wire 8 but are electrically connected to the chained terminal 30A via the conductive element 40 form a series of electrical circuits. As a result, power from the battery can be supplied to eight electric wires 9 (i.e., eight electrical components) via one electric wire 8. In other words, in order to supply power from the battery to each of the eight electric wires 9 (i.e., eight electrical components), it is not necessary to connect electric wires 8 to all four chained terminals 30A-30D. Therefore, the number of electric wires to be connected to the chained terminal 30 can be reduced compared to when the conductive element 40 is not used.

[0030] <Actions and Effects> As described above, according to the electrical junction box 1 of this embodiment, multiple chained terminals 30 are arranged in the holder 10, and two or more chained terminals 30 (i.e., all or some of the multiple chained terminals 30) are electrically connected to each other using the conductive parts 40. This forms a series of electrical circuits (see FIG. 10 ) consisting of the two or more chained terminals 30 and the conductive parts 40. Therefore, by connecting a power supply wire 8 to the wire connection portion 33 of any one of the two or more electrically connected chained terminals 30, power is supplied to the other chained terminals 30 via the conductive parts 40, eliminating the need to connect wires to all of the chained terminals 30. In other words, the number of wires to be connected to the chained terminals 30 can be reduced compared to when the conductive parts 40 are not used. As a result, bonding processing using a bonder can be simplified. For example, if all of the chained terminals 30 are electrically connected to each other using the conductive parts 40, as in this embodiment, power can be supplied to all of the chained terminals 30 using only a single wire 8, completely eliminating the need for a bonding process. In this way, the electrical junction box 1 according to this embodiment can facilitate the joining process using a bonder while arranging a plurality of chain terminals 30 in the holder 10.

[0031] Furthermore, the conductive component 40 has a contact portion (terminal piece 42) shaped to be conductively connected to the terminal portion 31 of the chained terminal 30. Therefore, the terminal portion 31 of the chained terminal 30, which is originally used to attach the fuse 20, can also be used to connect to the conductive component 40. This simplifies the structure of the chained terminal 30 compared to when the chained terminal 30 is provided with a contact portion dedicated to connecting to the conductive component 40. Furthermore, using a general-purpose chained terminal 30 can also reduce manufacturing costs.

[0032] <Other forms> It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. are possible as appropriate. In addition, the material, shape, dimensions, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as the present invention can be achieved.

[0033] In the above embodiment, the conductive component 40 includes four terminal pieces 42A, 42B, 42C, and 42D. However, as shown in Fig. 11(a), the terminal piece 42A may be omitted from the four terminal pieces 42A, 42B, 42C, and 42D. In this case, in order to supply power from the battery to each of the eight electric wires 9 (i.e., eight electrical components), it is necessary to connect each of the electric wires 8 to one of the three chain terminals 30B to 30D and the chain terminal 30A.

[0034] 11(b), the terminal pieces 42A and 42B may be omitted from the four terminal pieces 42A, 42B, 42C, and 42D. In this case, in order to supply power from the battery to each of the eight electric wires 9 (i.e., eight electrical components), it is necessary to connect the electric wires 8 to one of the two chain terminals 30C and 30D, the chain terminal 30A, and the chain terminal 30B, respectively.

[0035] Furthermore, in the above embodiment, the electrical junction box 1 is a relay box (electrical junction box) that houses multiple components, but the electrical junction box 1 may also be a structure that has a function other than that of a relay box (electrical junction box).

[0036] Here, the features of the embodiment of the electrical junction box 1 according to the present invention described above will be briefly summarized and listed below in [1] to [2]. [1] An electrical connection box (1) comprising: a holder (10) in which chain terminals (30) to which a plurality of electronic components (20) can be attached are arranged at a plurality of locations; and a conductive component (40) that electrically connects two or more of the chain terminals (30) to each other; Each of the plurality of chain terminals (30) is The electronic component (20) includes a plurality of terminal portions (31) to which the electronic component (20) can be attached, a connecting portion (32) that connects the plurality of terminal portions (31) in a series, and an electric wire connecting portion (33) to which an electric wire (8) can be connected, One of the chain terminals (30A) to which the electric wire (8) is to be connected to the electric wire connection portion (33) and the other of the chain terminals (30B to 30D) to which the electric wire (8) is not connected to the electric wire connection portion (33) and which are electrically connected to the one of the chain terminals (30A) via the conductive part (40) form a series of electric circuits. Electrical junction box (1). [2] In the electrical connection box (1) described in [1] above, The conductive component (40) is The chain terminal (30) has a contact portion (42) having a shape that can be electrically connected to the terminal portion (31). Electrical junction box (1). [Explanation of symbols]

[0037] 1 Electrical junction box 8 Electric wire 10 Holder 20 Fuse (electronic component) 30 chain terminal 31 Terminal section 32 Connecting part 33 Wire connection 40 Conductive parts 42 Terminal piece (contact part)

Claims

1. An electrical connection box comprising: a holder having chain terminals arranged at a plurality of locations to which a plurality of electronic components can be attached; and a conductive component that electrically connects two or more of the chain terminals to each other; Each of the plurality of chain terminals is a plurality of terminal portions to which the electronic components can be attached, a connecting portion that connects the plurality of terminal portions in a series, and an electric wire connecting portion to which an electric wire can be connected, One of the chain terminals to which the electric wire is to be connected to the electric wire connection portion and another of the chain terminals to which the electric wire is not connected to the electric wire connection portion and which is electrically connected to the one of the chain terminals via the conductive component constitute a series of electric circuits. Electrical junction box.

2. The electrical junction box according to claim 1, The conductive component is a contact portion having a shape that can be electrically connected to the terminal portion of the chain terminal; Electrical junction box.

3. In the electrical connection box according to claim 1, The plurality of chained terminals have a common structure. Electrical junction box.

4. The electrical junction box according to claim 1, The terminal portion of the chain terminal includes a pair of plate-shaped clamping pieces that are arranged such that end surfaces on one side in a plate thickness direction face each other and clamp the electronic component while elastically pressing the electronic component, The wire connection portion of the chain terminal includes a pair of plate-shaped crimping pieces, the end surfaces of which are arranged opposite to each other on one side in a plate thickness direction and which fix the wires by crimping. Electrical junction box.

5. The electrical junction box according to claim 1, The chained terminals arranged in the holder include: a first chained terminal in which the plurality of terminal portions are aligned in a first direction; a second chained terminal in which the plurality of terminal portions are aligned in the first direction and are disposed on one side of the first chained terminal in the first direction; a third chained terminal in which the plurality of terminal portions are aligned in the first direction and are disposed on one side of the first chained terminal in a second direction perpendicular to the first direction; and a fourth chained terminal in which the plurality of terminal portions are aligned in the first direction and are disposed on one side of the second chained terminal in the second direction and are disposed on one side of the third chained terminal in the first direction, the conductive component is connected to the terminal portion of the first chain terminal that is closest to one side in the first direction, the terminal portion of the second chain terminal that is closest to the other side in the first direction, the terminal portion of the third chain terminal that is closest to one side in the first direction, and the terminal portion of the fourth chain terminal that is closest to the other side in the first direction, the electric wire is connected to the electric wire connection portion of the first chain terminal, and the electric wire is not connected to the electric wire connection portion of each of the second chain terminal, the third chain terminal, and the fourth chain terminal; Electrical junction box.

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