Relay

Abstract

The present invention provides a relay, comprising a housing, a first fixed terminal and a second fixed terminal. The housing includes a first mounting portion and a second mounting portion. The first mounting portion has a first through hole penetrating in a first direction, and the second mounting portion has a second through hole penetrating in the first direction. The second mounting portion is separated from the first mounting portion in a second direction orthogonal to the first direction and is disposed offset to one side in a third direction orthogonal to the first direction and the second direction with respect to the first mounting portion. The first fixed terminal includes a first fastening portion, and the first fastening portion is provided with a first threaded insertion hole along the first direction and is exposed to the outside from the housing at a position on the side in the third direction relative to the first mounting portion. The second fixed terminal includes a second fastening portion, and the second fastening portion is provided with a second screw insertion hole along the first direction and is exposed to the outside from the housing on the other side in the third direction relative to the second mounting portion and is disposed offset to the other side in the third direction with respect to the first fastening portion.

Description

Technical Field

[0001] The present invention relates to a relay. Background Art

[0002] In the prior art, a relay for connecting and disconnecting an electric circuit is known. The relay disclosed in Japanese Patent Laid-Open No. 2016-201286 includes fixed terminals connected to external terminals. The fixed terminals are disposed to protrude from the housing to the outside. An installation portion for fixing to other components by fixing members such as screws is provided in the housing.

[0003] In recent years, miniaturization of relays has been increasingly demanded. In existing relays, in order to ensure a tool clearance, the installation portion protrudes from the housing. Therefore, there is a case where the relay is enlarged in the direction in which the installation portion protrudes. Summary of the Invention

[0004] An object of the present invention is to provide a relay that can ensure a tool clearance when fixing an installation portion of the relay to other components and can be miniaturized.

[0005] A relay according to an embodiment of the present invention includes a housing, a first fixed terminal, and a second fixed terminal. The housing includes a first installation portion and a second installation portion. The first installation portion includes a first through hole penetrating in a first direction. The second installation portion includes a second through hole penetrating in the first direction. The second installation portion is separated from the first installation portion to one side in a second direction orthogonal to the first direction and is disposed so as to be offset to one side in a third direction orthogonal to the first direction and the second direction with respect to the first installation portion. The first fixed terminal includes a first fastening portion. The first fastening portion is provided with a first screw insertion hole along the first direction and is exposed to the outside from the housing at a position on the third direction side with respect to the first installation portion. The second fixed terminal includes a second fastening portion. The second fastening portion is provided with a second screw insertion hole along the first direction and is exposed to the outside from the housing at a position on the other side in the third direction with respect to the second installation portion. The second fastening portion is disposed so as to be offset to the other side in the third direction with respect to the first fastening portion. The housing includes a first side portion disposed on the other side in the second direction, a second side portion disposed on one side in the second direction, a third side portion connected to the first side portion and the second side portion on one side in the third direction, and a fourth side portion connected to the first side portion and the second side portion on the other side in the third direction. The first fastening portion is disposed at a height position of the first fastening portion in the first direction so as not to protrude to one side in the third direction compared to a boundary between the first side portion and the third side portion at the same height position as the first fastening portion. The second fastening portion is disposed at a height position of the second fastening portion in the first direction so as not to protrude to the other side in the third direction compared to a boundary between the second side portion and the fourth side portion at the same height position as the second fastening portion.

[0006] In this relay, the second fastening portion is disposed on the other side of the second mounting portion in the third direction, and is offset from the first fastening portion to the other side in the third direction. That is, the first fastening portion and the second fastening portion are arranged in a staggered manner in the second direction. Thus, compared with the case where the first fastening portion and the second fastening portion are arranged side by side in the second direction, even if the first mounting portion is disposed on one side in the third direction and the second mounting portion is disposed on the other side in the third direction, the tool clearance when fixing the first mounting portion and the second mounting portion to other components can be ensured. As a result, the housing can be miniaturized in the first direction. Additionally, for example, when the first fixed terminal and the second fixed terminal are plate-shaped terminals, even when the widths of the first fixed terminal and the second fixed terminal are extended in the third direction to increase the current-carrying capacity, the tool clearance can be ensured, and the housing can be miniaturized in the third direction.

[0007] In addition, since the space around the boundary between the first side portion and the third side portion close to the first fastening portion is difficult to interfere with the first fastening portion, the space around the boundary between the first side portion and the third side portion can be effectively utilized. Similarly, since the space around the boundary between the second side portion and the fourth side portion close to the second fastening portion is difficult to interfere with the first fastening portion, the space around the boundary between the second side portion and the fourth side portion can be effectively utilized.

[0008] The first fastening portion may also be disposed at a position on the other side of the third side portion in the third direction. The second fastening portion may also be disposed at a position on the side of the fourth side portion in the third direction. In this case, the space around the boundary between the first side portion and the third side portion and the space around the boundary between the second side portion and the fourth side portion can also be effectively utilized.

[0009] The first fastening portion may also protrude from the first side portion. The second fastening portion may also protrude from the second side portion. In this case, when using plate-shaped fixed terminals, the tool clearance can be ensured, and the housing can be miniaturized in the third direction.

[0010] The imaginary line connecting the first threaded insertion hole and the second threaded insertion hole may also be inclined with respect to the third side portion and the fourth side portion when viewed from the first direction. In this case, the housing can also be miniaturized in the first direction while ensuring the tool clearance.

[0011] The relay may also further include a movable contact piece that extends in the second direction within the housing and can contact the first fixed terminal and the second fixed terminal. The imaginary line connecting the first threaded insertion hole and the second threaded insertion hole may also be inclined with respect to the third side portion and the fourth side portion when viewed from the first direction. In this case, the housing can also be miniaturized in the third direction while ensuring the tool clearance.

[0012] The relay may also include a connector connection portion configured to be exposed on one side or the other side of the housing in the second direction. The connector connection portion may also be visually confirmed from between the first mounting portion and the first fastening portion, or from between the second mounting portion and the second fastening portion when viewed from the first direction. In this case, in the relay in which the connector can be visually confirmed from the first direction, both the tool clearance can be ensured and the miniaturization of the housing can be achieved in the third direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of the relay;

[0014] Figure 2 is a view of the relay as viewed from above.

[0015] Figure 3 is Figure 2 a cross-sectional view taken along line III-III of

[0016] Figure 4 is a perspective view of the relay according to a modified example;

[0017] Figure 5 is a view of the relay according to the modified example as viewed from above.

[0018] Figure 6 is a view of the relay according to another embodiment as viewed from above. DETAILED DESCRIPTION

[0019] Hereinafter, an embodiment of a relay 100 according to one aspect of the present invention will be described with reference to the drawings. In addition, when referring to the drawings, the upper side in Figure 3 is set as up (Z1), the lower side is set as down (Z2), the left side is set as left (X2), and the right side is set as right (X1) for explanation. In addition, the near side of the paper surface of Figure 3 is taken as front (Y1), and the back side of the paper surface is taken as back (Y2) for explanation. The up-down direction Z is orthogonal to the left-right direction X. The front-back direction Y is orthogonal to the up-down direction Z and the left-right direction X. The up-down direction Z is an example of the first direction. The left-right direction X is an example of the second direction. The front-back direction Y is an example of the third direction.

[0020] In addition, one side of the left-right direction X is taken as the right side (X1 side), and the other side is taken as the left side (X2 side) for explanation. One side of the front-back direction Y is taken as the front side (Y1 side), and the other side is taken as the back side (Y2 side) for explanation. In addition, these directions are defined for convenience of explanation and do not limit the arrangement direction of the relay 100.

[0021] The relay 100 includes a housing 2, a contact device 3, a drive device 4, and a connector connection portion 5.

[0022] The housing 2 is a substantially quadrilateral box shape and is formed of an insulating material. Inside the housing 2, a contact device 3 and a drive device 4 are accommodated.

[0023] The housing 2 includes an upper portion 2a, a lower portion 2b, first to fourth side portions 2c to 2f, a first mounting portion 21, and a second mounting portion 22.

[0024] The upper portion 2a and the lower portion 2b are rectangular and extend along the left - right direction X and the front - rear direction Y. The first side portion 2c and the second side portion 2d extend along the front - rear direction Y and the up - down direction Z and connect the upper portion 2a and the lower portion 2b. The first side portion 2c is disposed on the left side (X2 side) in the left - right direction X. The second side portion 2d is disposed on the right side (X1 side) in the left - right direction X. The second side portion 2d and the first side portion 2c are disposed opposite to each other in the left - right direction X.

[0025] The third side portion 2e and the fourth side portion 2f extend along the left - right direction X and the up - down direction Z and connect the upper portion 2a and the lower portion 2b. The third side portion 2e is disposed on one side (Y1 side) in the front - rear direction Y and is connected to the first side portion 2c and the second side portion 2d. The fourth side portion 2f is disposed on the other side (Y2 side) in the front - rear direction Y and is connected to the first side portion 2c and the second side portion 2d. The fourth side portion 2f and the third side portion 2e are disposed opposite to each other in the front - rear direction Y.

[0026] The first mounting portion 21 and the second mounting portion 22 are provided for fixing the relay 100 to other components by fixing components such as screws. The first mounting portion 21 is provided to protrude leftward from the lower portion on the rear side of the first side portion 2c. The first mounting portion 21 includes a first through - hole 21a. The first through - hole 21a is a hole that penetrates in the up - down direction Z. In the first through - hole 21a, for example, a collar member is press - fitted, and a fixing component such as a screw is inserted, so that the first mounting portion 21 is fixed to other components.

[0027] The second mounting portion 22 is disposed at an interval from the first mounting portion 21 in the left - right direction X. In the present embodiment, the second mounting portion 22 is disposed separated to the right side (X1 side) from the first mounting portion 21. The second mounting portion 22 is disposed offset forward (Y1 side) with respect to the first mounting portion 21. In the present embodiment, the second mounting portion 22 is provided to protrude rightward from the lower portion on the front side of the second side portion 2d.

[0028] The second mounting portion 22 includes a second through - hole 22a. The second through - hole 22a is a hole that penetrates in the up - down direction Z. In the second through - hole 22a, for example, a collar member is press - fitted, and a fixing component such as a screw is inserted, so that the second mounting portion 22 is fixed to other components.

[0029] The contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 10, and a movable mechanism 11.

[0030] The first fixed terminal 6 and the second fixed terminal 7 are plate-shaped terminals that extend in the left-right direction X. The first fixed terminal 6 and the second fixed terminal 7 extend inside and outside the housing 2. The first fixed terminal 6 and the second fixed terminal 7 are arranged at intervals in the left-right direction X. The first fixed terminal 6 and the second fixed terminal 7 are formed of a conductive material.

[0031] The first fixed terminal 6 includes a first fixed contact 6a and a first fastening portion 6b. The first fixed contact 6a is arranged inside the housing 2. The first fixed contact 6a is separated from the first fixed terminal 6. In addition, the first fixed contact 6a may be integrally formed with the first fixed terminal 6.

[0032] The first fastening portion 6b is connected to an external terminal (not shown) such as a conductive bar by screw fastening. The first fastening portion 6b protrudes from the housing 2 to the outside. The first fastening portion 6b is exposed to the outside from the housing 2 at a position closer to the front side (Y1 side) than the first mounting portion 21. In the present embodiment, the first fastening portion 6b protrudes leftward from near the upper part of the first side portion 2c of the housing 2. When viewed from the up-down direction Z, the first fastening portion 6b and the first through hole 21a are arranged at intervals in the front-rear direction Y. The first fastening portion 6b includes a first screw insertion hole 6c. The first screw insertion hole 6c is a hole that penetrates in the up-down direction Z.

[0033] For the first fastening portion 6b, it is arranged such that, at the height position of the first fastening portion 6b in the up-down direction Z, it does not protrude forward (Y1 side) compared to the boundary B1 between the first side portion 2c and the third side portion 2e at the same height as the first fastening portion 6b. In the present embodiment, the entire first fastening portion 6b is arranged at a position closer to the rear side (Y2 side) than the boundary B1 between the first side portion 2c and the third side portion 2e. The first fastening portion 6b is arranged at a position closer to the rear side than the third side portion 2e. The front end of the first fastening portion 6b is located at a position closer to the rear side than the third side portion 2e.

[0034] A first screw support member 23 provided on the housing 2 is arranged below the first fastening portion 6b. The first screw support member 23 is arranged adjacent to the first fastening portion 6b below the first fastening portion 6b. An internal thread member (not shown) that engages with a fixing member such as a screw is arranged inside the first screw support member 23.

[0035] The second fixed terminal 7 includes a second fixed contact 7a and a second fastening portion 7b. The second fixed contact 7a is arranged inside the housing 2. The second fixed contact 7a is separated from the second fixed terminal 7. In addition, the second fixed contact 7a may be integrally formed with the second fixed terminal 7.

[0036] The second fastening portion 7b is connected to an external terminal (not shown) such as a conductive bar by screw fastening. The second fastening portion 7b protrudes from the housing 2 to the outside. The second fastening portion 7b is exposed to the outside from the housing 2 at a position rearward (Y2 side) of the second mounting portion 22. The second fastening portion 7b is arranged offset rearward (Y2 side) with respect to the first fastening portion 6b. In the present embodiment, the second fastening portion 7b protrudes rightward from near the upper part of the second side portion 2d of the housing 2. The second fastening portion 7b is exposed to the outside from the housing 2 at a position rearward of the second mounting portion 22 and is arranged offset rearward with respect to the first fastening portion 6b. When viewed from the vertical direction Z, the second fastening portion 7b and the second through hole 22a are arranged at intervals in the front-rear direction Y. The second fastening portion 7b includes a second screw insertion hole 7c. The second screw insertion hole 7c is a hole penetrating in the vertical direction Z.

[0037] For the second fastening portion 7b, it is arranged such that at the height position of the second fastening portion 7b in the vertical direction Z, it does not protrude rearward (Y2 side) compared to the boundary B2 between the second side portion 2d and the fourth side portion 2f at the same height as the second fastening portion 7b. In the present embodiment, the entire second fastening portion 7b is arranged at a position forward (Y1 side) of the boundary B2 between the second side portion 2d and the fourth side portion 2f. The second fastening portion 7b is arranged at a position forward (Y1 side) of the second side portion 2d. The rear end of the second fastening portion 7b is located at a position forward of the fourth side portion 2f.

[0038] A second screw support member 24 provided on the housing 2 is arranged below the second fastening portion 7b. The second screw support member 24 is arranged adjacent to the second fastening portion 7b below the second fastening portion 7b. An internal thread member (not shown) that engages with a fixing member such as a screw is arranged inside the second screw support member 24.

[0039] As Figure 2 shown, the imaginary line L connecting the first screw insertion hole 6c and the second screw insertion hole 7c is inclined with respect to the third side portion 2e and the fourth side portion 2f when viewed from the vertical direction Z. That is, the imaginary line L extends in a direction intersecting the third side portion 2e and the fourth side portion 2f when viewed from the vertical direction Z. In addition, the imaginary line L is inclined with respect to the movable contact piece 10 when viewed from the vertical direction Z.

[0040] The movable contact piece 10 is a plate-like member that is long in one direction and extends in the left-right direction X inside the housing 2. The movable contact piece 10 is formed of a conductive material. The movable contact piece 10 can move in the contact direction and the separation direction. The contact direction is the direction in which the movable contact piece 10 approaches the first fixed contact 6a and the second fixed contact 7a ( Figure 3 the upper side inFigure 3 below). Therefore, the contact direction and the separation direction are parallel to the up-down direction Z.

[0041] The movable contact piece 10 includes movable contacts 10a and 10b. The movable contact 10a is arranged at a position opposite to the first fixed contact 6a. The movable contact 10b is arranged at a position opposite to the second fixed contact 7a. The movable contacts 10a and 10b are separated from the movable contact piece 10. Alternatively, the movable contacts 10a and 10b may be integrated with the movable contact piece 10.

[0042] The movable mechanism 11 includes a drive shaft 12 and a contact spring 13. The drive shaft 12 extends in the up-down direction Z and penetrates the movable contact piece 10 in the up-down direction Z. The drive shaft 12 is arranged to be movable in the contact direction and the separation direction. The contact spring 13 biases the movable contact piece 10 in the contact direction.

[0043] The drive device 4 moves the movable mechanism 11 in the contact direction and the separation direction by electromagnetic force. The drive device 4 includes a coil 31, a movable iron core 32, a fixed iron core 33, a yoke 34, and a return spring 35.

[0044] When the coil 31 is excited by being applied with a voltage, it generates an electromagnetic force that moves the movable iron core 32 in the contact direction. The movable iron core 32 is connected to the drive shaft 12 so as to be integrally movable. The fixed iron core 33 is arranged at a position opposite to the movable iron core 32. The yoke 34 is arranged so as to surround the coil 31. The return spring 35 is arranged between the movable iron core 32 and the fixed iron core 33. The return spring 35 biases the movable iron core 32 in the separation direction.

[0045] The connector connection part 5 is provided for supplying a drive power source to the coil 31 and is connected to the drive device 4. The connector connection part 5 is arranged to be exposed on the right side (X1 side) or the left side (X2 side) of the housing 2, and is arranged so that it can be visually confirmed between the first mounting part 21 and the first fastening part 6b, or between the second mounting part 22 and the second fastening part 7b when viewed from the up-down direction Z. In the present embodiment, the connector connection part 5 is arranged to be exposed on the right side (X1 side) of the housing 2. The connector connection part 5 protrudes outward from near the center of the second side part 2d of the housing 2. As Figure 2 shown, when viewed from the up-down direction Z, the connector connection part 5 can be visually confirmed between the second mounting part 22 and the second fastening part 7b.

[0046] In the relay 100 having the above structure, the second fastening portion 7b is disposed on the rear side (Y2 side) of the second mounting portion 22 and is offset rearward (Y2 side) with respect to the first fastening portion 6b. That is, the first fastening portion 6b and the second fastening portion 7b are arranged in a staggered manner in the left-right direction X. Thus, compared with the case where the first fastening portion 6b and the second fastening portion 7b are arranged side by side in the left-right direction X, even if the first mounting portion 21 is disposed on the front side (Y1 side) and the second mounting portion 22 is disposed on the rear side (Y2 side), a tool clearance can be ensured when the first mounting portion 21 and the second mounting portion 22 are fixed to other components. As a result, the housing 2 can be miniaturized in the front-rear direction Y.

[0047] In addition, in order to increase the power-on capacity of the relay 100, even when the widths of the first fixed terminal 6 and the second fixed terminal 7 are extended in the front-rear direction Y, a tool clearance can be ensured, and the housing 2 can be miniaturized in the front-rear direction.

[0048] In addition, since the first fastening portion 6b is disposed at a position on the rear side (Y2 side) of the third side portion 2e, the space around the boundary B1 can be effectively utilized as compared with the case where the first fastening portion 6b protrudes forward (Y1 side) from the third side portion 2e, for example. Similarly, since the second fastening portion 7b is disposed at a position on the front side (Y1 side) of the fourth side portion 2f, the space around the boundary B2 can be effectively utilized.

[0049] As described above, the embodiment of the electromagnetic relay according to one aspect of the present invention has been described, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.

[0050] In the above embodiment, the first fixed terminal 6 and the second fixed terminal 7 are formed of plate-like terminals, but they may be formed of, for example, cylindrical terminals as shown in Figure 4 and Figure 5 . The first fixed terminal 6 and the second fixed terminal 7 protrude outward from the upper portion 2a of the housing 2. When viewed from the up-down direction Z, at least a part of the first mounting portion 21 and the second mounting portion 22 overlap with the first fixed terminal 6 in the front-rear direction Y, and at least a part of them overlaps with the second fixed terminal 7 in the left-right direction X. The first mounting portion 21 is provided at the bottom of a recess 2g formed by being recessed from the upper portion 2a toward the lower portion 2b near the boundary between the first side portion 2c and the fourth side portion 2f. Similarly, the second mounting portion 22 is provided at the bottom of a recess 2h formed by being recessed from the upper portion 2a toward the lower portion 2b near the boundary between the second side portion 2d and the third side portion 2e.

[0051] In the above-described embodiment, the first side portion 2c and the second side portion 2d extend in the front-rear direction Y and the up-down direction Z, and the third side portion 2e and the fourth side portion 2f extend in the left-right direction X and the up-down direction Z. However, the shapes of the first to fourth side portions 2c to 2f are not limited to the above-described embodiment. The first to fourth side portions 2c to 2f may be bent into an arc shape or may be inclined in a specified direction.

[0052] The connector connection portion 5 is not limited to the above-described embodiment. The drive device 4 and the connector connection portion 5 may also be connected via a wiring harness. In addition, the arrangement of the connector connection portion 5 is not limited to the above-described embodiment.

[0053] In the above-described embodiment, one side in the front-rear direction is set as the front side (Y1 side), the other side is set as the rear side (Y2 side), one side in the left-right direction X is set as the right side (X2 side), and the other side is set as the left side (X1 side). It is also possible to set one side in the front-rear direction as the rear side (Y1 side), the other side as the front side (Y2 side), one side in the left-right direction X as the left side (X2 side), and the other side as the right side (X1 side). The structure of the relay 100 in this case is as Figure 6 shown and becomes a structure in which the structure of the relay 100 shown in Figure 2 is reversed in the front-rear direction Y and the left-right direction X.

Claims

1. A relay, characterized in that, it has: a housing including a first mounting portion and a second mounting portion, the first mounting portion having a first through-hole penetrating in a first direction, the second mounting portion having a second through-hole penetrating in the first direction, the second mounting portion being separated from the first mounting portion toward one side in a second direction orthogonal to the first direction and being arranged offset toward one side in a third direction orthogonal to the first direction and the second direction with respect to the first mounting portion; a first fixed terminal including a first fastening portion, the first fastening portion having a first screw insertion hole provided along the first direction and being exposed to the outside from the housing on the side in the third direction relative to the first mounting portion; and a second fixed terminal including a second fastening portion, the second fastening portion having a second screw insertion hole provided along the first direction and being exposed to the outside from the housing on the other side in the third direction relative to the second mounting portion and being arranged offset to the other side in the third direction with respect to the first fastening portion, a movable contact piece extending in the second direction within the housing and capable of contacting the first fixed terminal and the second fixed terminal, the housing including a first side portion disposed on the other side in the second direction, a second side portion disposed on one side in the second direction, a third side portion connected to the first side portion and the second side portion on one side in the third direction, and a fourth side portion connected to the first side portion and the second side portion on the other side in the third direction, the first fastening portion being arranged such that at the height position of the first fastening portion in the first direction, it does not protrude toward one side in the third direction compared to the boundary between the first side portion and the third side portion at the same height position as the first fastening portion, the second fastening portion being arranged such that at the height position of the second fastening portion in the first direction, it does not protrude toward the other side in the third direction compared to the boundary between the second side portion and the fourth side portion at the same height position as the second fastening portion, an imaginary line connecting the first screw insertion hole and the second screw insertion hole is inclined with respect to the movable contact piece when viewed from the first direction.

2. A relay, characterized in that, it has: a housing including a first mounting portion and a second mounting portion, the first mounting portion having a first through-hole penetrating in a first direction, the second mounting portion having a second through-hole penetrating in the first direction, the second mounting portion being separated from the first mounting portion toward one side in a second direction orthogonal to the first direction and being arranged offset toward one side in a third direction orthogonal to the first direction and the second direction with respect to the first mounting portion; a first fixed terminal including a first fastening portion, the first fastening portion having a first screw insertion hole provided along the first direction and being exposed to the outside from the housing on the side in the third direction relative to the first mounting portion; and A second fixed terminal, which includes a second fastening portion. The second fastening portion is provided with a second screw insertion hole along the first direction and is exposed to the outside from the housing on the other side in the third direction than the second mounting portion, and is arranged offset to the other side in the third direction with respect to the first fastening portion. The housing includes a first side portion disposed on the other side in the second direction, a second side portion disposed on one side in the second direction, a third side portion connected to the first side portion and the second side portion on one side in the third direction, and a fourth side portion connected to the first side portion and the second side portion on the other side in the third direction. The first fastening portion is arranged at the height position of the first fastening portion in the first direction in such a manner that it does not protrude toward one side in the third direction compared to the boundary between the first side portion and the third side portion at the same height position as the first fastening portion. The second fastening portion is arranged at the height position of the second fastening portion in the first direction in such a manner that it does not protrude toward the other side in the third direction compared to the boundary between the second side portion and the fourth side portion at the same height position as the second fastening portion. The first fixed terminal and the second fixed terminal are plate-shaped terminals. The first fastening portion protrudes from the first side portion. The second fastening portion protrudes from the second side portion.

3. A relay Characterized in that it has: A housing, which includes a first mounting portion and a second mounting portion. The first mounting portion has a first through hole penetrating in the first direction, and the second mounting portion has a second through hole penetrating in the first direction. The second mounting portion is separated from the first mounting portion toward one side in the second direction orthogonal to the first direction and is arranged offset to one side in the third direction orthogonal to the first direction and the second direction with respect to the first mounting portion; a first fixed terminal, which includes a first fastening portion. The first fastening portion is provided with a first screw insertion hole along the first direction and is exposed to the outside from the housing on one side in the third direction than the first mounting portion. and A second fixed terminal, which includes a second fastening portion. The second fastening portion is provided with a second screw insertion hole along the first direction and is exposed to the outside from the housing on the other side in the third direction than the second mounting portion, and is arranged offset to the other side in the third direction with respect to the first fastening portion. The housing includes a first side portion disposed on the other side in the second direction, a second side portion disposed on one side in the second direction, a third side portion connected to the first side portion and the second side portion on one side in the third direction, and a fourth side portion connected to the first side portion and the second side portion on the other side in the third direction. The first fastening portion is arranged at the height position of the first fastening portion in the first direction in such a manner that it does not protrude toward one side in the third direction compared to the boundary between the first side portion and the third side portion at the same height position as the first fastening portion. The height position of the second fastening portion in the first direction is arranged such that, compared with the boundary between the second side portion and the fourth side portion at the same height position as the second fastening portion, it does not protrude to the other side in the third direction, and it further has a connector connection portion. The connector connection portion is arranged to be exposed on one side of the housing in the second direction, and when viewed from the first direction, the connector connection portion can be visually confirmed between the second mounting portion and the second fastening portion.

4. A relay characterized in that it has: a housing including a first mounting portion and a second mounting portion, the first mounting portion having a first through hole penetrating in a first direction, the second mounting portion having a second through hole penetrating in the first direction, the second mounting portion being separated from the first mounting portion to one side in a second direction orthogonal to the first direction and being arranged to be offset to one side in a third direction orthogonal to the first direction and the second direction with respect to the first mounting portion; a first fixed terminal including a first fastening portion, the first fastening portion being provided with a first screw insertion hole along the first direction and being exposed to the outside from the housing on the side closer to the third direction than the first mounting portion; and a second fixed terminal including a second fastening portion, the second fastening portion being provided with a second screw insertion hole along the first direction and being exposed to the outside from the housing on the other side closer to the third direction than the second mounting portion, and being arranged to be offset to the other side in the third direction with respect to the first fastening portion, the housing includes a first side portion arranged on the other side in the second direction, a second side portion arranged on one side in the second direction, a third side portion on one side in the third direction and connected to the first side portion and the second side portion, and a fourth side portion on the other side in the third direction and connected to the first side portion and the second side portion, the height position of the first fastening portion in the first direction is arranged such that, compared with the boundary between the first side portion and the third side portion at the same height position as the first fastening portion, it does not protrude to one side in the third direction, the height position of the second fastening portion in the first direction is arranged such that, compared with the boundary between the second side portion and the fourth side portion at the same height position as the second fastening portion, it does not protrude to the other side in the third direction, and it further has a connector connection portion, the connector connection portion is arranged to be exposed on the other side of the housing in the second direction, and when viewed from the first direction, the connector connection portion can be visually confirmed between the first mounting portion and the first fastening portion.

5. The relay according to any one of claims 2 to 4, characterized in that: The imaginary line connecting the first screw insertion hole and the second screw insertion hole is inclined with respect to the third side portion and the fourth side portion when viewed from the first direction.

6. The relay according to any one of claims 1 to 4, characterized in that: The first fastening portion is disposed at a position on the other side of the third side portion in the third direction. The second fastening portion is disposed at a position on one side of the fourth side portion in the third direction.

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