First relay and relay unit

Abstract

To provide a first relay and a relay unit that can be used for general purposes according to the required bus bar circuit pattern. [Solution] The first relay 10 comprises a first housing 11 formed in a box shape, a first contact unit 12 housed in the first housing 11 and in which the connection between the contacts is turned on and off to pass or cut off electricity, a first terminal 14 and a second terminal 15 connected to the power supply side contact 12A and the load side contact 12B of the first contact unit 12, respectively, and provided on a first outer surface 13 of the first housing 11, and a third terminal 17 and a fourth terminal 18 connected to the power supply side contact 12A and the load side contact 12B of the first contact unit 12, respectively, and provided on a second outer surface 16 intersecting the first outer surface 13 of the first housing 11.

Description

[Technical Field]

[0001] The present invention relates to a first relay and a relay unit. [Background technology]

[0002] Conventionally, there has been a relay unit in which a plurality of relays are provided, each of which passes or cuts off a current flowing from a power source to a load, and these relays are connected by splices. This relay unit passes or cuts off current along a plurality of current paths through which current flows from the power source to the load (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-174006 Summary of the Invention [Problem to be solved by the invention]

[0004] The relay unit described above includes a box-shaped housing, multiple contacts, tab terminals, and a bus bar. Each contact is housed in the housing, and the connection between the contacts is turned on and off to pass or cut off current. The tab terminal is formed in a plate shape and is partially exposed to the outside of the housing. The bus bar is housed in the housing and connects each contact to the tab terminal for electrical continuity. Such a relay unit is connected to other auxiliary devices via the tab terminals and to a wire harness that bundles multiple electric wires.

[0005] However, the relay unit described above has multiple contacts provided within the housing and uses a specified bus bar, which means that the circuit pattern is fixed. Therefore, when connecting the relay unit to a different type of auxiliary equipment or wire harness, it is necessary to create new wiring using a spline joint, bonder, double crimping, etc., which reduces versatility and has led to a need for improvement.

[0006] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a first relay and a relay unit that can be used for various purposes according to the required circuit pattern. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the first relay according to the present invention has the following features. a first housing formed in a box shape; a first contact portion housed in the first housing and configured to turn on and off a connection between contacts to conduct or cut off electricity; a first terminal and a second terminal connected to a power supply side contact and a load side contact of the first contact portion, respectively, and provided on a first outer surface of the first housing; a third terminal and a fourth terminal connected to a power supply side contact and a load side contact of the first contact portion, respectively, and provided on a second outer surface intersecting the first outer surface of the first housing; First relay.

[0008] In order to achieve the above-mentioned object, the relay unit according to the present invention has the following features. The first relay mentioned above, a second relay connected to the first relay, The second relay includes a second housing formed in a box shape; a second contact portion housed in the second housing, the second contact portion turning on and off a connection between contacts to conduct or cut off electricity; a fifth terminal and a sixth terminal connected to a power supply side contact and a load side contact of the second contact portion, respectively, and provided on a third outer surface of the second housing; a seventh terminal and an eighth terminal that are connected to a power supply side contact and a load side contact of the second contact portion, respectively, and are provided on a fourth outer surface that intersects with the third outer surface of the second housing and faces the second outer surface in a coupling direction, and are connectable to the third terminal and the fourth terminal; Relay unit.

[0009] Furthermore, in order to achieve the above-mentioned object, the relay unit according to the present invention is characterized as follows. The first relay mentioned above, a third relay connected to the first relay, The third relay includes a third housing formed in a box shape; a third contact portion housed in the third housing, the third contact portion turning on and off a connection between contacts to energize or cut off electricity; a ninth terminal and a tenth terminal connected to a power supply side contact and a load side contact of the third contact portion, respectively, and provided on a fifth outer surface of the third housing; an eleventh terminal connected to a power supply side contact of the third contact portion, intersecting the fifth outer surface of the third housing and provided on a sixth outer surface opposite to the second outer surface in a coupling direction, and connectable to the third terminal; Relay unit.

[0010] In order to achieve the above-mentioned object, the relay unit according to the present invention has the following features. The first relay mentioned above, a fourth relay connected to the first relay, The fourth relay includes a fourth housing formed in a box shape; a fourth contact portion housed in the fourth housing and configured to turn on and off a connection between contacts to energize or cut off electricity; a twelfth terminal and a thirteenth terminal connected to a power supply side contact and a load side contact of the fourth contact portion, respectively, and provided on a seventh outer surface of the fourth housing; a fourteenth terminal connected to a load-side contact of the fourth contact portion, intersecting the seventh outer surface of the fourth housing, and provided on an eighth outer surface opposite to the second outer surface in a coupling direction, and connectable to the fourth terminal; Relay unit. [Effects of the Invention]

[0011] The first relay and relay unit according to the present invention have the advantage of being versatile enough to be adapted to the required bus bar circuit pattern.

[0012] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a bottom view showing a first relay of a first embodiment according to the present invention. [Figure 2] FIG. 2 is a circuit diagram of the first relay shown in FIG. [Figure 3] FIG. 3 is a circuit diagram of the relay unit according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a bottom view of the relay unit shown in FIG. [Figure 5] FIG. 5 is a circuit diagram of a relay unit according to a second embodiment of the present invention. [Figure 6] FIG. 6 is a bottom view of the relay unit shown in FIG. [Figure 7] FIG. 7 is a circuit diagram of a relay unit according to a third embodiment of the present invention. [Figure 8] 8 is a bottom view of the relay unit shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be described below with reference to the drawings. In the present invention, a desired pattern can be obtained from the three circuit patterns shown in FIGS. 3, 5, and 7 by selecting and assembling any one of the second to fourth relays 20 to 40 to a first relay 10 described below. The circuit pattern shown in FIG. 3 is a pattern in which both ends of the contact portions of two relays are connected together. The circuit pattern shown in FIG. 5 is a pattern in which only the power supply sides of the contact portions of two relays are connected. The circuit pattern shown in FIG. 7 is a pattern in which only the load sides of the contact portions of two relays are connected.

[0015] First Embodiment First, we will explain the configuration of the first relay 10. As shown in Figures 1 and 2, the first relay 10 according to the first embodiment of the present invention includes a first housing 11, a first contact portion 12, a first terminal 14, a second terminal 15, a third terminal 17, a fourth terminal 18, a coil 19, and coil terminals 110 and 111.

[0016] The first housing 11 is formed in a box shape. The first contact unit 12 is housed in the first housing 11, and the connection between the contacts is turned on and off to conduct or cut off electricity between the contacts. The first terminal 14 and the second terminal 15 are connected to a power supply side contact 12A and a load side contact 12B of the first contact unit 12, respectively. The first terminal 14 and the second terminal 15 are provided on a bottom surface (first outer surface) 13 of the first housing 11. In this embodiment, the first terminal 14 and the second terminal 15 are provided in the form of tabs and protrude from the bottom surface 13.

[0017] The third terminal 17 and the fourth terminal 18 are connected to the power supply side contact 12A and the load side contact 12B of the first contact portion 12, respectively. The third terminal 17 and the fourth terminal 18 are provided on a side surface (second outer surface) 16 that intersects with the bottom surface 13 of the first housing. In this embodiment, the third terminal 17 and the fourth terminal 18 are female terminals housed in cylindrical housings 112, 113 that protrude from the side surface 16. The third terminal 17 and the fourth terminal 18 are provided side by side on the side surface 16 in the left-right direction of the drawing.

[0018] The coil 19 is housed in the first housing 11, and turns on and off the first contact portion 12 by electromagnetic force generated when current is applied. Coil terminals 110, 111 are connected to both ends of the coil 19, respectively. The coil terminals 110, 111 are provided on the bottom surface 13 of the first housing 11. In this embodiment, the coil terminals 110, 111 are provided in the form of tabs and protrude from the bottom surface 13.

[0019] Next, a relay unit 50 in which the second relay 20 is assembled to the first relay 10 will be described. As shown in Figures 3 and 4, the relay unit 50 according to the first embodiment of the present invention includes the first relay 10 and the second relay 20 connected to the first relay 10.

[0020] The second relay 20 has a second housing 21, a second contact portion 22, a fifth terminal 24, a sixth terminal 25, a seventh terminal 27, an eighth terminal 28, a coil 29, and coil terminals 210 and 211.

[0021] The second housing 21 is formed in a box shape. The second contact unit 22 is housed in the second housing 21, and the connection between the contacts is turned on and off to conduct or cut off electricity between the contacts. The fifth terminal 24 and the sixth terminal 25 are connected to the power supply side contact 22A and the load side contact 22B of the second contact unit 22, respectively. The fifth terminal 24 and the sixth terminal 25 are provided on the bottom surface (third outer surface) 23 of the second housing 21. In this embodiment, the fifth terminal 24 and the sixth terminal 25 are provided in the form of tabs and protrude from the bottom surface 23.

[0022] The seventh terminal 27 and the eighth terminal 28 are respectively connected to the power supply side contact 22A and the load side contact 22B of the second contact portion 22. The seventh terminal 27 and the eighth terminal 28 are provided on a side surface (fourth outer surface) 26 that intersects with the lower surface 23 of the second housing 21. In this embodiment, the seventh terminal 27 and the eighth terminal 28 are housed in cylindrical housings 212 and 213 that protrude from the side surface 26, and their tips protrude from the housings 212 and 213.

[0023] The seventh terminal 27 and the eighth terminal 28 are male terminals connectable to the third terminal 17 and the fourth terminal 18 of the first relay 10. The side surface 26 on which the seventh terminal 27 and the eighth terminal 28 are provided faces the side surface (second outer surface) 16 of the first relay 10 in the connecting direction. The seventh terminal 27 and the eighth terminal 28 are provided side by side in the left-right direction on the page on the side surface 26. The third terminal 17 and the seventh terminal 27 face each other in the connecting direction. The fourth terminal 18 and the eighth terminal 28 face each other in the connecting direction.

[0024] The coil 29 is housed in the second housing 21, and turns on and off the second contact portion 22 by electromagnetic force generated when current is applied. Coil terminals 210, 211 are connected to both ends of the coil 29, respectively. The coil terminals 210, 211 are provided on the lower surface 23 of the second housing 21. In this embodiment, the coil terminals 210, 211 are provided in the form of tabs and protrude from the lower surface 13.

[0025] In such a relay unit 50, by assembling (connecting) the second relay 20 to the first relay 10, both ends of the first contact portion 12 of the first relay 10 and the second contact portion 22 of the second relay 20 are connected to each other, as shown in FIG. 3.

[0026] According to the relay unit 50 according to the first embodiment of the present invention, a desired relay unit can be obtained by the simple operation of combining the first relay 10 and the second relay 20.

[0027] Second Embodiment Next, a relay unit 60 according to a second embodiment of the present invention will be described, in which the third relay 30 is assembled to the first relay 10. In the second embodiment described below, the same reference numerals will be used in the drawings to simplify or omit the description of the components already described in the first embodiment.

[0028] 5 and 6, the relay unit 60 includes the first relay 10 according to the first embodiment described above, and a third relay 30 connected to the first relay 10. The third relay 30 includes a third housing 31, a third contact portion 32, a ninth terminal 34, a tenth terminal 35, an eleventh terminal 37, a coil 39, and coil terminals 310 and 311.

[0029] The third housing 31 is formed in a box shape. The third contact unit 32 is housed in the third housing 31, and the connection between the contacts is turned on and off to conduct or cut off electricity between the contacts. The ninth terminal 34 and the tenth terminal 35 are connected to the power supply side contact 32A and the load side contact 32B of the third contact unit 32, respectively. The ninth terminal 34 and the tenth terminal 35 are provided on the bottom surface (fifth outer surface) 33 of the third housing 31. In this embodiment, the ninth terminal 34 and the tenth terminal 35 are provided in the form of tabs and protrude from the bottom surface 33.

[0030] The eleventh terminal 37 is connected to the power supply side contact 32A of the third contact portion 32. The eleventh terminal 37 is provided on a side surface (sixth outer surface) 36 that intersects with the bottom surface 33 of the third housing 31. In this embodiment, the eleventh terminal 37 is housed in a cylindrical housing 312 that protrudes from the side surface 36, and its tip protrudes from the housing 312. The eleventh terminal 37 is a male terminal that can be connected to the third terminal 17 of the first relay 10. The side surface 36 on which the eleventh terminal 37 is provided faces the side surface (second outer surface) 16 of the first relay 10 in the connecting direction. The eleventh terminal 37 and the third terminal 17 face each other in the connecting direction.

[0031] The coil 39 is housed in the third housing 31, and turns on and off the third contact portion 32 by electromagnetic force generated when current is applied. Coil terminals 310 and 311 are connected to both ends of the coil 39, respectively. The coil terminals 310 and 311 are provided on the bottom surface 33 of the third housing 31. In this embodiment, the coil terminals 310 and 311 are provided in the form of tabs and protrude from the bottom surface 33.

[0032] By connecting the third terminal 17 of the first relay 10 and the eleventh terminal 37 of the third relay 30, such a relay unit 60 can have a circuit configuration in which the power supply side contacts 12A, 32A of the first contact portion 12 of the first relay 10 and the third contact portion 32 of the third relay 30 are connected to each other, and the load side contacts 12B, 32B are not connected, as shown in FIG. 5 .

[0033] As described above, according to the relay unit 60 of the second embodiment of the present invention, similarly to the first embodiment described above, a desired relay unit can be obtained by the simple operation of combining the first relay 10 and the third relay 30 by connecting the third terminal 17 and the eleventh terminal 37.

[0034] Third Embodiment Next, a relay unit 70 according to a third embodiment of the present invention will be described, in which the fourth relay 40 is assembled to the first relay 10. In the third embodiment described below, the same reference numerals will be used in the drawings to denote components that have already been described in the first and second embodiments, and descriptions thereof will be simplified or omitted.

[0035] 7 and 8, the relay unit 70 includes the first relay 10 according to the first embodiment described above, and a fourth relay 40 connected to the first relay 10. The fourth relay 40 includes a fourth housing 41, a fourth contact portion 42, a twelfth terminal 44, a thirteenth terminal 45, a fourteenth terminal 48, a coil 49, and coil terminals 410 and 411.

[0036] The fourth housing 41 is formed in a box shape. The fourth contact unit 42 is housed in the fourth housing 41, and the connection between the contacts is turned on and off to conduct or cut off electricity between the contacts. The twelfth terminal 44 and the thirteenth terminal 45 are connected to the power supply side contact 42A and the load side contact 42B of the fourth contact unit 42, respectively. The twelfth terminal 44 and the thirteenth terminal 45 are provided on the bottom surface (seventh outer surface) 43 of the fourth housing 41. In this embodiment, the twelfth terminal 44 and the thirteenth terminal 45 are provided in the form of tabs and protrude from the bottom surface 43.

[0037] The fourteenth terminal 48 is connected to the power supply side contact 42B of the fourth contact portion 42. The fourteenth terminal 48 is provided on a side surface (eighth outer surface) 46 that intersects with the bottom surface 43 of the fourth housing 41. In this embodiment, the fourteenth terminal 48 is housed in a cylindrical housing 413 that protrudes from the side surface 46, and its tip protrudes from the housing 413. The fourteenth terminal 48 is a male terminal that can be connected to the fourth terminal 18 of the first relay 10. The side surface 46 on which the fourteenth terminal 48 is provided faces the side surface (second outer surface) 16 of the first relay 10 in the connecting direction. The fourteenth terminal 48 and the fourth terminal 18 face each other in the connecting direction.

[0038] The coil 49 is housed in the fourth housing 41, and turns on and off the fourth contact portion 42 by electromagnetic force generated when current is applied. Coil terminals 410, 411 are connected to both ends of the coil 49, respectively. The coil terminals 410, 411 are provided on the lower surface 43 of the fourth housing 41. In this embodiment, the coil terminals 410, 411 are provided in the form of tabs and protrude from the lower surface 43.

[0039] By connecting the fourth terminal 18 of the first relay 10 and the fourteenth terminal 48 of the fourth relay 40, such a relay unit 70 can have a circuit configuration in which the load-side contacts 12A, 42A of the first contact portion 12 of the first relay 10 and the fourth contact portion 42 of the fourth relay 40 are connected to each other, and the power-supply-side contacts 12A, 42A are not connected, as shown in FIG. 7 .

[0040] As described above, according to the relay unit 70 of the third embodiment of the present invention, similarly to the first and second embodiments described above, a desired relay unit can be obtained by the simple operation of combining the first relay 10 and the fourth relay 40 by connecting the fourth terminal 18 and the fourteenth terminal 48.

[0041] As described above, according to the first relay 10 of the embodiment described above, a relay unit 50, 60, 70 having a desired connection can be obtained by assembling any one of the second relay 20, the third relay 30, and the fourth relay 40. In other words, according to the first relay 10 of the embodiment of the present invention, by appropriately combining the second relay 20, the third relay 30, and the fourth relay 40 to obtain a desired relay unit, there is no need to create new wiring using a separate spline joint, bonder, double crimping, or the like as in the prior art, and excellent versatility can be obtained.

[0042] 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. Furthermore, 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.

[0043] Here, the features of the embodiments of the first terminal-equipped relay and relay unit according to the present invention described above will be briefly summarized and listed below in [1] to [4].

[0044] [1] a first housing (11) formed in a box shape; a first contact portion (12) housed in the first housing (11) and configured to turn on and off a connection between contacts to conduct or cut off electricity; a first terminal (14) and a second terminal (15) connected to a power supply side contact (12A) and a load side contact (12B) of the first contact portion (12), respectively, and provided on a first outer surface (13) of the first housing (11); a third terminal (17) and a fourth terminal (18) connected to a power supply side contact (12A) and a load side contact (12B) of the first contact portion (12), respectively, and provided on a second outer surface (16) of the first housing (11) that intersects with the first outer surface (13), 1st relay (10).

[0045] According to the first relay (10) having the configuration [1] above, by appropriately combining it with other relays to obtain a desired relay unit, there is no need to create new wiring using separate spline joints, bonders, double crimping, etc. as in the past, and excellent versatility can be obtained.

[0046] [2] The first relay (10) described in [1] above; a second relay (20) connected to the first relay (10), The second relay (20) includes a second housing (21) formed in a box shape, a second contact portion (22) housed in the second housing (21) and configured to turn on and off a connection between contacts to conduct or cut off electricity; a fifth terminal (24) and a sixth terminal (25) connected to the power supply side contact (22A) and the load side contact (22B) of the second contact portion (22), respectively, and provided on the third outer surface (23) of the second housing (21); a seventh terminal (27) and an eighth terminal (28) connected to the power supply side contact (22A) and the load side contact (22B) of the second contact portion (22), respectively, and connected to the third terminal (17) and the fourth terminal (18), the seventh terminal (27) and the eighth terminal (28) being provided on a fourth outer surface (26) that intersects with the third outer surface (23) of the second housing (21) and faces the second outer surface (16) in a coupling direction; Relay unit (50).

[0047] According to the relay unit (50) having the configuration [2] above, a desired relay unit can be obtained by a simple operation of combining the first relay (10) and the second relay (20) by connecting the third terminal (17) and the fourth terminal (18) with the seventh terminal (27) and the eighth terminal (28).

[0048] [3] The first relay (10) described in [1] above; a third relay (30) connected to the first relay (10), The third relay (30) includes a third housing (31) formed in a box shape, a third contact portion (32) housed in the third housing (31) and configured to turn on and off a connection between contacts to conduct or cut off electricity; a ninth terminal (34) and a tenth terminal (35) connected to the power supply side contact (32A) and the load side contact (32B) of the third contact portion (32), respectively, and provided on the fifth outer surface (33) of the third housing (31); an eleventh terminal (37) connected to a power supply side contact (32A) of the third contact portion (32), intersecting the fifth outer surface (33) of the third housing (31) and provided on a sixth outer surface (36) facing the second outer surface (16) in a coupling direction; and Relay unit (60).

[0049] According to the relay unit (60) having the configuration [3] above, the desired relay unit can be obtained by a simple operation of combining the first relay (10) and the third relay (30) by connecting the third terminal (17) and the eleventh terminal (37).

[0050] [4] The first relay (10) described in [1] above; a fourth relay (40) connected to the first relay (10), The fourth relay (40) includes a fourth housing (41) formed in a box shape, a fourth contact portion (42) housed in the fourth housing (41) and configured to turn on and off a connection between contacts to conduct or cut off electricity; a twelfth terminal (44) and a thirteenth terminal (45) connected to the power supply side contact (42A) and the load side contact (42B) of the fourth contact portion (42), respectively, and provided on the seventh outer surface (43) of the fourth housing (41); a fourteenth terminal (48) connected to a load-side contact (42B) of the fourth contact portion (42), intersecting the seventh outer surface (43) of the fourth housing (41) and provided on an eighth outer surface (46) facing the second outer surface (16) in a coupling direction; and a fourteenth terminal (48) connectable to the fourth terminal (18). Relay unit (70).

[0051] According to the relay unit (70) having the configuration [4] above, the desired relay unit can be obtained by a simple operation of combining the first relay (10) and the fourth relay (40) by connecting the fourth terminal (18) and the fourteenth terminal (48). [Explanation of symbols]

[0052] 10. First Relay 11 First cabinet 12 First contact part 12A, 12B, 22A, 22B, 32A, 32B, 42A, 42B contacts 13 Bottom surface (first outer surface) 14 1st terminal 15 2nd terminal 16 Side (second outer surface) 17 3rd terminal 18 4th terminal 20 2nd Relay 21 Second cabinet 22 Second contact part 23 Bottom surface (third outer surface) 24 5th terminal 25 6th terminal 26 Side (4th outer surface) 27 7th terminal 28 8th terminal 30 Third Relay 31 Third cabinet 32 Third contact point 33 Lower surface (5th outer surface) 34 9th terminal 35 10th terminal 36 Side (6th outer surface) 37 11th terminal 40 4th Relay 41 4th cabinet 42 Fourth contact point 43 Bottom surface (7th outer surface) 44 12th terminal 45 13th terminal 46 Side (8th outer surface) 50, 60, 70 relay units

Claims

1. a first housing formed in a box shape; a first contact portion housed in the first housing, the first contact portion turning on and off a connection between contacts to conduct or cut off electricity; a first terminal and a second terminal connected to a power supply side contact and a load side contact of the first contact portion, respectively, and provided on a first outer surface of the first housing; a third terminal and a fourth terminal connected to a power supply side contact and a load side contact of the first contact portion, respectively, and provided on a second outer surface of the first housing that intersects with the first outer surface, First relay.

2. a first relay according to claim 1; a second relay connected to the first relay, The second relay includes a second housing formed in a box shape; a second contact portion housed in the second housing, the second contact portion turning on and off a connection between contacts to conduct or cut off electricity; a fifth terminal and a sixth terminal connected to a power supply side contact and a load side contact of the second contact portion, respectively, and provided on a third outer surface of the second housing; a seventh terminal and an eighth terminal connected to a power supply side contact and a load side contact of the second contact portion, respectively, and connected to the third terminal and the fourth terminal, the seventh terminal and the eighth terminal being provided on a fourth outer surface that intersects with the third outer surface of the second housing and faces the second outer surface in a coupling direction; Relay unit.

3. a first relay according to claim 1; a third relay connected to the first relay, The third relay includes a third housing formed in a box shape; a third contact portion housed in the third housing, the third contact portion turning on and off a connection between contacts to conduct or cut off electricity; a ninth terminal and a tenth terminal connected to a power supply side contact and a load side contact of the third contact portion, respectively, and provided on a fifth outer surface of the third housing; an eleventh terminal connected to a power supply side contact of the third contact portion, intersecting the fifth outer surface of the third housing and provided on a sixth outer surface opposite to the second outer surface in a coupling direction, and connectable to the third terminal; Relay unit.

4. a first relay according to claim 1; a fourth relay connected to the first relay, The fourth relay includes a fourth housing formed in a box shape; a fourth contact portion housed in the fourth housing, the fourth contact portion turning on and off a connection between contacts to conduct or cut off electricity; a twelfth terminal and a thirteenth terminal connected to a power supply side contact and a load side contact of the fourth contact portion, respectively, and provided on a seventh outer surface of the fourth housing; a fourteenth terminal connected to a load-side contact of the fourth contact portion, intersecting the seventh outer surface of the fourth housing, and provided on an eighth outer surface opposite to the second outer surface in a coupling direction, and connectable to the fourth terminal; Relay unit.

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