Electromagnetic relay

Abstract

An electromagnetic relay suppresses a size increase of the electromagnetic relay and improves heat dissipation of a fixed terminal. The electromagnetic relay includes a housing, a movable contact piece, a first fixed terminal, and a driving device. The movable contact piece is disposed in the housing. The first fixed terminal includes a first contact portion and a first terminal portion. The first contact portion opposes the movable contact piece in the housing. The first terminal portion protrudes outside the housing. The first terminal portion has a curved shape. The driving device moves the movable contact piece in a contact direction and a separation direction.

Description

Technical Field

[0001] This invention relates to an electromagnetic relay. Background Technology

[0002] An electromagnetic relay includes a fixed terminal, a movable contact, and a housing. The fixed terminal protrudes from inside the housing to the outside. The movable contact is designed to move in both a contact direction and a departure direction. The contact direction is the direction in which the movable contact contacts the fixed terminal. The departure direction is the direction in which the movable contact moves away from the fixed terminal. Current flows to the fixed terminal through the contact between the movable contact and the fixed terminal.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2021-057225 Summary of the Invention

[0004] When a large current flows through an electromagnetic relay, the heat generated at the fixed terminal increases. Therefore, it is desirable to improve heat dissipation by increasing the surface area of ​​the fixed terminal. However, if the fixed terminal becomes larger in order to increase its surface area, the electromagnetic relay becomes larger. The object of the present invention is to suppress the increase in the size of the electromagnetic relay and improve the heat dissipation of the fixed terminal.

[0005] An electromagnetic relay according to one aspect of the present invention includes a housing, a movable contact, a first fixed terminal, and a driving device. The movable contact is disposed within the housing. The first fixed terminal includes a first contact portion and a first terminal portion. The first contact portion is located within the housing and faces the movable contact. The first terminal portion protrudes outward from the housing. The first terminal portion has a curved shape. The driving device moves the movable contact in a contact direction and a departure direction. The contact direction is the direction in which the movable contact contacts the first contact portion. The departure direction is the direction in which the movable contact moves away from the first contact portion.

[0006] In this type of electromagnetic relay, the first terminal portion of the first fixed terminal has a bent shape. Therefore, the surface area of ​​the first fixed terminal is increased, and the heat dissipation of the first fixed terminal is improved. Furthermore, the first terminal portion is bent outside the housing. Therefore, it is possible to suppress the increase in the size of the electromagnetic relay.

[0007] The first fixed terminal may also extend vertically from the first contact portion toward the first terminal portion. The first terminal portion may also have a shape that bends in a direction perpendicular to the vertical direction. In this case, air convection outside the housing can easily reach the first terminal portion. Therefore, the heat dissipation of the first fixed terminal is improved.

[0008] The first terminal portion may also include a first flat portion and a first curved portion. The first curved portion may also be curved relative to the first flat portion. In this case, the surface area of ​​the first fixed terminal increases due to the first curved portion. As a result, the heat dissipation of the first fixed terminal becomes more efficient.

[0009] The first flat portion and the first curved portion can also be formed integrally. In this case, the first flat portion and the first curved portion are easily formed by bending the integral component. Therefore, the manufacture of the first fixed terminal becomes easier.

[0010] The housing may also include a base supporting the first fixed terminal. The base may also include a bottom surface and legs. The legs may also protrude from the bottom surface. At least a portion of the first bent portion may also be located between the bottom surface and the lower end of the legs. In this case, if the electromagnetic relay is mounted on the substrate, the legs contact the substrate, thereby ensuring space between the bottom surface of the base and the substrate. Furthermore, at least a portion of the first bent portion is disposed in the space between the bottom surface of the base and the substrate. Therefore, the heat dissipation of the first fixed terminal is improved.

[0011] The lower end of the first bend can also be located below the lower end of the leg. In this case, the first bend is connected to the substrate. As a result, the heat dissipation of the first fixing terminal is improved.

[0012] The electromagnetic relay may also include a second fixed terminal. The second fixed terminal may also include a second contact portion and a second terminal portion. The second contact portion may also be located inside the housing opposite to a movable contact piece. The second terminal portion may also protrude outside the housing. The second terminal portion may also have a curved shape.

[0013] In this case, the second terminal portion of the second fixed terminal has a curved shape. Therefore, the surface area of ​​the second fixed terminal increases, and its heat dissipation becomes more efficient. Furthermore, the second terminal portion is curved outside the housing. Therefore, it is possible to suppress the increase in the size of the electromagnetic relay.

[0014] The second terminal portion may also include a second flat portion and a second curved portion. The second curved portion may also be curved relative to the second flat portion. In this case, the surface area of ​​the second fixed terminal increases due to the second curved portion. As a result, the heat dissipation of the second fixed terminal becomes more efficient.

[0015] The first curved portion and the second curved portion may also have a shape that curves in the same direction relative to the first flat portion and the second flat portion. In this case, the first terminal portion and the second terminal portion are configured compactly.

[0016] The first and second curved portions can also have shapes that curve in opposite directions relative to the first and second flat portions. In this case, air convection can easily reach the first terminal portion and the second terminal portion, respectively. As a result, the heat dissipation of the first and second fixed terminals is improved.

[0017] The first terminal portion may also include a third curved portion. The third curved portion may also be curved in the same direction as the first curved portion relative to the first flat portion. In this case, the surface area of ​​the first fixed terminal is further increased by the third curved portion. Therefore, the heat dissipation of the first fixed terminal is improved. Furthermore, the first curved portion and the third curved portion are compactly arranged.

[0018] The third bend can also be bent in the opposite direction to the first bend relative to the first flat portion. In this case, air convection can easily reach both the first and third bends. As a result, the heat dissipation of the first fixed terminal becomes higher.

[0019] According to the present invention, it is possible to suppress the increase in the size of electromagnetic relays and improve the heat dissipation of fixed terminals. Attached Figure Description

[0020] Figure 1 This is a perspective view of the electromagnetic relay as described in the embodiment.

[0021] Figure 2 This is a 3D view of the interior of an electromagnetic relay.

[0022] Figure 3 This is a top view of the electromagnetic relay when the moving part is in the disconnected position.

[0023] Figure 4 This is a top view of the electromagnetic relay when the moving part is in the closed position.

[0024] Figure 5 This is a three-dimensional view of the electromagnetic relay as seen from below.

[0025] Figure 6 This is a bottom view of an electromagnetic relay.

[0026] Figure 7 This is a side view of the inside of an electromagnetic relay.

[0027] Figure 8 This is a three-dimensional view of the first fixed terminal.

[0028] Figure 9A This is a bottom view of the first terminal portion of the first modified example.

[0029] Figure 9B This is a bottom view of the first terminal portion of the second variant.

[0030] Figure 9C This is a bottom view of the first terminal portion of the third variant.

[0031] Figure 10A This is a bottom view of the first and second terminal portions of the fourth variation.

[0032] Figure 10B This is a bottom view of the first and second terminal portions of the fifth variation.

[0033] Figure 10C This is a bottom view of the first and second terminal portions of the sixth variation.

[0034] Symbol Explanation

[0035] 3: Housing; 4: Drive unit; 11: Base; 13: First fixed terminal; 14: Second fixed terminal; 15: First movable contact piece; 43: Leg; 51: First contact portion; 52: First terminal portion; 53: First flat portion; 54: First curved portion; 57: Third curved portion; 61: Second contact portion; 62: Second terminal portion; 63: Second flat portion; 64: Second curved portion. Detailed Implementation

[0036] Hereinafter, the electromagnetic relay 1 according to the embodiment will be described with reference to the accompanying drawings. Figure 1 This is a perspective view of the electromagnetic relay 1 according to the embodiment. Figure 2 This is a 3D view of the interior of electromagnetic relay 1. Figure 3 and Figure 4 This is a top view of the interior of electromagnetic relay 1.

[0037] The electromagnetic relay 1 includes a contact device 2, a housing 3, and a drive device 4. The contact device 2 and the drive device 4 are disposed within the housing 3. The housing 3 includes a base 11 and a casing 12. Figures 2 to 4 The outer casing 12 is omitted. The base 11 supports the contact device 2 and the drive device 4.

[0038] In the following description, the direction from the base 11 toward the contact device 2 and the drive device 4 is defined as upward, and the opposite direction is defined as downward. The direction from the drive device 4 toward the contact device 2 is defined as forward, and the opposite direction is defined as backward. The direction perpendicular to the up / down and front / back directions is defined as left / right.

[0039] The contact device 2 includes a first fixed terminal 13, a second fixed terminal 14, a first movable contact piece 15, a second movable contact piece 16, and a moving part 17. The first fixed terminal 13 and the second fixed terminal 14 are formed of a conductive material such as copper. The first fixed terminal 13 and the second fixed terminal 14 extend in the vertical direction, respectively.

[0040] The first fixed terminal 13 and the second fixed terminal 14 are arranged separately from each other in the left-right direction. The first fixed terminal 13 and the second fixed terminal 14 extend in the up-down direction, respectively. The first fixed terminal 13 and the second fixed terminal 14 are fixed to the base 11. The first fixed terminal 13 and the second fixed terminal 14 protrude from inside the housing 3 to outside the housing 3. The first fixed terminal 13 and the second fixed terminal 14 protrude downward from the base 11.

[0041] A first fixed contact 21 and a third fixed contact 23 are connected to the first fixed terminal 13. A second fixed contact 22 and a fourth fixed contact 24 are connected to the second fixed terminal 14. The first contact 21 to the fourth fixed contact 24 are formed of a conductive material such as silver or copper.

[0042] The first movable contact 15 and the second movable contact 16 extend in a left-right direction. The first movable contact 15 and the second movable contact 16 are separate from each other. The first movable contact 15 and the second movable contact 16 are formed of a conductive material such as copper.

[0043] The first movable contact 15 is disposed opposite to the first fixed terminal 13 and the second fixed terminal 14. A first movable contact 25 and a second movable contact 26 are connected to the first movable contact 15. The first movable contact 25 is disposed opposite to the first fixed contact 21. The second movable contact 26 is disposed opposite to the second fixed contact 22.

[0044] The second movable contact 16 is disposed opposite to the first fixed terminal 13 and the second fixed terminal 14. A third movable contact 27 and a fourth movable contact 28 are connected to the second movable contact 16. The third movable contact 27 is disposed opposite to the third fixed contact 23. The fourth movable contact 28 is disposed opposite to the fourth fixed contact 24. The first movable contact 25 to the fourth movable contact 28 are formed of a conductive material such as silver or copper.

[0045] The movable component 17 holds the first movable contact piece 15 and the second movable contact piece 16. The movable component 17 is made of an electrically insulating resin. The movable component 17 is movable in the back-and-forth direction. The movable component 17 is movable to a closed position and an open position. Figure 3 In the middle, the moving part 17 is in the open position. When the moving part 17 is in the open position, the movable contacts 25 to 28 are separated from the fixed contacts 21 to 24, respectively. Figure 4 In the closed position, the movable component 17 is in contact with the fixed contacts 21 to 24. When the movable component 17 is in the closed position, the movable contacts 25 to 28 are in contact with the fixed contacts 21 to 24, respectively.

[0046] The driving device 4 moves the first movable contact piece 15 and the second movable contact piece 16 by electromagnetic force. The driving device 4 moves the first movable contact piece 15 and the second movable contact piece 16 in a contact direction and a departure direction. The contact direction is the direction in which the movable contacts 25-28 contact the fixed contacts 21-24. The departure direction is the direction in which the movable contacts 25-28 leave the fixed contacts 21-24. In this embodiment, the contact direction is rearward, and the departure direction is forward.

[0047] The drive unit 4 includes a coil 31, a spool 32, a movable iron core 33, a fixed iron core 34, and a magnetic yoke 35. The coil 31 is wound around the spool 32. At least a portion of the movable iron core 33 is disposed within the spool 32. The movable iron core 33 is configured to move in a forward-backward direction. The fixed iron core 34 is disposed within the spool 32. The fixed iron core 34 is positioned opposite the movable iron core 33. The coil 31 generates an electromagnetic force that moves the movable iron core 33 when energized.

[0048] The movable iron core 33 is connected to the moving member 17. The movable iron core 33 moves in the contact direction according to the magnetic force generated from the coil 31. Accompanying the movement of the movable iron core 33, the moving member 17 moves to the closed position. The magnetic yoke 35 is configured to surround the coil 31. The magnetic yoke 35 is arranged on the magnetic circuit formed by the coil 31.

[0049] The electromagnetic relay 1 includes a first reset spring 36 and a second reset spring 37. The first reset spring 36 and the second reset spring 37 are disposed between the moving part 17 and the drive device 4. The first reset spring 36 and the second reset spring 37 exert a force on the moving part 17 in the moving direction.

[0050] Next, the operation of the electromagnetic relay 1 will be explained. When the coil 31 is not energized, the drive device 4 is not energized. In this case, the moving part 17, together with the movable iron core 33, is pressed away by the spring force of the return springs 36 and 37, thereby the moving part 17 is located in the position... Figure 3 The disconnection point is shown.

[0051] In this state, the first movable contact 15 and the second movable contact 16 are also pressed in the disengaging direction via the moving member 17. Therefore, when the moving member 17 is in the open position, the first movable contact 25 and the second movable contact 26 disengage from the first fixed contact 21 and the second fixed contact 22. Similarly, when the moving member 17 is in the open position, the third movable contact 27 and the fourth movable contact 28 disengage from the third fixed contact 23 and the fourth fixed contact 24.

[0052] If coil 31 is energized, drive device 4 is energized. In this case, the movable iron core 33 moves in the contact direction by overcoming the spring force of return springs 36 and 37 through the electromagnetic force of coil 31. As a result, moving part 17, first movable contact piece 15, and second movable contact piece 16 move together in the contact direction. Therefore, as... Figure 4 As shown, the moving part 17 moves to the closed position.

[0053] As a result, when the moving part 17 is in the closed position, the first movable contact 25 and the second movable contact 26 contact the first fixed contact 21 and the second fixed contact 22, respectively. Similarly, when the moving part 17 is in the closed position, the third movable contact 27 and the fourth movable contact 28 contact the third fixed contact 23 and the fourth fixed contact 24, respectively. Thus, the first movable contact piece 15 and the second movable contact piece 16 are electrically connected to the first fixed terminal 13 and the second fixed terminal 14.

[0054] If the current flowing into coil 31 is stopped and demagnetization is achieved, the movable iron core 33 is pressed away by the spring force of the return springs 36 and 37. Consequently, the moving part 17, the first movable contact piece 15, and the second movable contact piece 16 move together in the away direction. Therefore, as... Figure 3 As shown, the moving part 17 moves to the disconnected position.

[0055] As a result, when the moving part 17 is in the disconnected position, the first movable contact 25 and the second movable contact 26 separate from the first fixed contact 21 and the second fixed contact 22. Similarly, when the moving part 17 is in the disconnected position, the third movable contact 27 and the fourth movable contact 28 separate from the third fixed contact 23 and the fourth fixed contact 24.

[0056] When a large current flows through the electromagnetic relay 1, the first fixed terminal 13, the second fixed terminal 14, and the first movable contact piece 15 and the second movable contact piece 16 become hot. In the electromagnetic relay 1 of this embodiment, in order to improve the heat dissipation of the electromagnetic relay 1, such as... Figure 5 As shown, the first fixing terminal 13 and the second fixing terminal 14 have a curved shape. The structure of the first fixing terminal 13 and the second fixing terminal 14 will be described in detail below.

[0057] Figure 6 This is a bottom view of electromagnetic relay 1. Figure 7 This is a side view of the interior of electromagnetic relay 1. Figure 8 This is a perspective view of the first fixed terminal 13. (See diagram below.) Figures 5 to 8As shown, the first fixed terminal 13 includes a first contact portion 51 and a first terminal portion 52. The first contact portion 51 is disposed within the housing 3. The first contact portion 51 extends upward from the base 11. The first contact portion 51 is opposite to the movable contact pieces 15 and 16. A first fixed contact 21 and a third fixed contact 23 are mounted on the first contact portion 51.

[0058] The first terminal portion 52 is disposed outside the housing 3. The first terminal portion 52 protrudes from the bottom surface 47 of the base 11. The first terminal portion 52 extends downward from the bottom surface 47 of the base 11. The first terminal portion 52 has a shape that is bent in the horizontal direction. The first terminal portion 52 has a shape that is bent into an L-shape.

[0059] In detail, the first terminal portion 52 includes a first flat portion 53 and a first bent portion 54. The first contact portion 51, the first flat portion 53, and the first bent portion 54 are integrally formed. For example, the first contact portion 51, the first flat portion 53, and the first bent portion 54 are formed by bending a piece of metal plate. The first flat portion 53 is connected to the first contact portion 51. The first flat portion 53 extends downward from the first contact portion 51.

[0060] The first curved portion 54 is connected to the first flat portion 53. The first curved portion 54 is disposed inside the first flat portion 53 in the left-right direction. The first curved portion 54 is curved relative to the first flat portion 53. The first curved portion 54 is curved rearward. The first curved portion 54 extends rearward from the first flat portion 53.

[0061] like Figure 1 and Figure 5 As shown, the base 11 includes a plurality of legs 43-46. The plurality of legs 43-46 project downwards from the bottom surface 47 of the base 11. Figure 7 As shown, multiple legs 43-46 are in contact with the base plate 100 on which the electromagnetic relay 1 is mounted.

[0062] like Figure 7 As shown, a portion of the first curved portion 54 is located between the bottom surface 47 and the lower ends 431 and 441 of the legs 43 and 44. The upper end 55 of the first curved portion 54 is located below the bottom surface 47. The lower end 56 of the first curved portion 54 is located below the lower ends 431 and 441 of the legs 43 and 44. The first terminal portion 52 is connected to the substrate 100. The first flat portion 53 and the first curved portion 54 are connected to the substrate 100.

[0063] The second fixed terminal 14 has the same curved shape as the first fixed terminal 13. The second fixed terminal 14 includes a second contact portion 61 and a second terminal portion 62. The second contact portion 61 is disposed within the housing 3. The second contact portion 61 extends upward from the base 11. The second contact portion 61 is opposite to the movable contact pieces 15 and 16. A second fixed contact 22 and a fourth fixed contact 24 are mounted on the second contact portion 61.

[0064] The second terminal portion 62 is disposed outside the housing 3. The second terminal portion 62 protrudes from the bottom surface 47 of the base 11. The second terminal portion 62 extends downward from the bottom surface 47 of the base 11. Figure 6 As shown, the second terminal portion 62 has a shape that bends in the same direction as the first terminal portion 52. The second terminal portion 62 has an L-shaped shape. The second terminal portion 62 has a shape that is symmetrical to the first terminal portion 52.

[0065] In detail, the second terminal portion 62 includes a second flat portion 63 and a second curved portion 64. The second contact portion 61, the second flat portion 63, and the second curved portion 64 are integrally formed. The second flat portion 63 is connected to the second contact portion 61. The second flat portion 63 extends downward from the second contact portion 61.

[0066] The second curved portion 64 is connected to the second flat portion 63. The second curved portion 64 is disposed inside the second flat portion 63 in the left-right direction. The second curved portion 64 is opposite to the first curved portion 54 in the left-right direction. The second curved portion 64 is curved relative to the second flat portion 63. The second curved portion 64 is curved in the same direction as the first curved portion 54. The second curved portion 64 is curved rearward.

[0067] The second curved portion 64 extends rearward from the second flat portion 63. Similar to the first curved portion 54, the second curved portion 64 is disposed below the bottom surface 47 of the base 11. Like the first flat portion 53 and the first curved portion 54, the second flat portion 63 and the second curved portion 64 are connected to the substrate 100.

[0068] In the electromagnetic relay 1 of this embodiment described above, the first terminal portion 52 of the first fixed terminal 13 has a bent shape. Therefore, the surface area of ​​the first fixed terminal 13 is increased, and the heat dissipation of the first fixed terminal 13 is improved. The second terminal portion 62 of the second fixed terminal 14 also has a bent shape. Therefore, the surface area of ​​the second fixed terminal 14 is increased, and the heat dissipation of the second fixed terminal 14 is improved. Furthermore, the first terminal portion 52 and the second terminal portion 62 are bent outside the housing 3. Therefore, it is possible to suppress the enlargement of the electromagnetic relay 1.

[0069] The above describes one embodiment of the present invention, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.

[0070] The construction of the contact device 2 and the drive device 4 is not limited to the above embodiment and can be modified. For example, in the above embodiment, the electromagnetic relay 1 is a so-called plunger-type electromagnetic relay, but other types of electromagnetic relays, such as hinge-type relays, may also be provided with a fixed terminal having the same construction as the first fixed terminal 13 described above.

[0071] The shape or configuration of the first fixed terminal 13, the second fixed terminal 14, the first movable contact piece 15, and the second movable contact piece 16 can also be changed. For example, the first movable contact piece 15 and the second movable contact piece 16 can also be formed as one piece. That is, the first movable contact 25 to the fourth movable contact 28 can also be connected to the one-piece movable contact pieces 15 and 16. Alternatively, the second movable contact piece 16, the third movable contact 27, the fourth movable contact 28, the third fixed contact 23, and the fourth fixed contact 24 can also be omitted.

[0072] The first fixed contact 21 and the third fixed contact 23 can also be integrated with the first fixed terminal 13. Alternatively, the first fixed contact 21 and the third fixed contact 23 can be omitted. The second fixed contact 22 and the fourth fixed contact 24 can also be integrated with the second fixed terminal 14. Alternatively, the second fixed contact 22 and the fourth fixed contact 24 can be omitted.

[0073] The first movable contact 25 and the second movable contact 26 can also be integrated with the first movable contact piece 15. Alternatively, the first movable contact 25 and the second movable contact 26 can be omitted. The third movable contact 27 and the fourth movable contact 28 can also be integrated with the second movable contact piece 16. Alternatively, the third movable contact 27 and the fourth movable contact 28 can be omitted.

[0074] The shapes of the first terminal portion 52 and the second terminal portion 62 are not limited to the above embodiment and can be modified. For example, the first flat portion 53 and the first curved portion 54 can also be separate from each other. The second flat portion 63 and the second curved portion 64 can also be separate from each other.

[0075] Figure 9A This is a bottom view of the first terminal portion 52 in the first modified example. (See attached image.) Figure 9A As shown, the first terminal portion 52 may also have a U-shaped bend. More specifically, the first terminal portion 52 further includes a third bend portion 57. The third bend portion 57 bends in the same direction as the first bend portion 54.

[0076] Figure 9B This is a bottom view of the first terminal portion 52 in the second modified example. (See attached image.) Figure 9B As shown, the third curved portion 57 can also be bent in the opposite direction to the first curved portion 54.

[0077] Figure 9C This is a bottom view of the first terminal portion 52 in the third variation. In the above embodiment, the first bent portion 54 is bent at 90 degrees relative to the first flat portion 53. However, it is also possible to... Figure 9C As shown, the bending angle of the first bent portion 54 is an angle other than 90 degrees. For example, the bending angle of the first bent portion 54 may also be an obtuse angle. Furthermore, the second terminal portion 62 may have the same shape as the first terminal portion 52 in the first to third variations.

[0078] In the above embodiment, the first terminal portion 52 and the second terminal portion 62 have a shape that is symmetrical to each other. However, the first terminal portion 52 and the second terminal portion 62 may also have a shape that is asymmetrical to each other. For example, Figure 10A This is a bottom view of the first terminal portion 52 and the second terminal portion 62 in the fourth modified example. (See attached image.) Figure 10A As shown, the first curved portion 54 and the second curved portion 64 can also be bent in opposite directions.

[0079] Figure 10B This is a bottom view of the first terminal portion 52 and the second terminal portion 62 in the fifth modified example. (See attached image.) Figure 10B As shown, the second terminal portion 62 may also include a fourth bent portion 67. The second bent portion 64 and the fourth bent portion 67 may also be bent in the opposite direction to the first bent portion 54 and the third bent portion 57.

[0080] Figure 10C This is a bottom view of the first terminal portion 52 and the second terminal portion 62 in the fifth modified example. (See attached image.) Figure 10C As shown, the shapes of the first terminal portion 52 and the second terminal portion 62 may also be different. For example, the bending angle of the first bent portion 54 and the bending angle of the second bent portion 64 may also be different.

[0081] Industrial availability

[0082] According to the present invention, it is possible to suppress the increase in the size of electromagnetic relays and improve the heat dissipation of fixed terminals.

Claims

1. An electromagnetic relay, characterized in that, have: case; A movable contact piece is disposed within the housing; The first fixed terminal includes a first contact portion inside the housing that faces the movable contact piece, and a first terminal portion that protrudes out of the housing and has a curved shape. as well as A driving device that moves the movable contact piece in a contact direction and a departure direction, wherein the contact direction is the direction in which the movable contact piece contacts the first contact portion, and the departure direction is the direction in which the movable contact piece leaves the first contact portion. The first terminal portion includes: First flat section; as well as The first curved portion is curved relative to the first flat portion. The housing includes a base that supports the first fixed terminal. The base includes a bottom surface and legs projecting from the bottom surface. At least a portion of the first curved portion is located between the bottom surface and the lower end of the leg.

2. The electromagnetic relay according to claim 1, characterized in that, The first fixed terminal extends vertically from the first contact portion toward the first terminal portion. The first terminal portion has a shape that bends in a direction perpendicular to the vertical direction.

3. The electromagnetic relay according to claim 1, characterized in that, The first flat portion and the first curved portion are integrally formed.

4. The electromagnetic relay according to claim 1, characterized in that, The lower end of the first curved portion is located below the lower end of the leg.

5. The electromagnetic relay according to claim 1, characterized in that, It also includes a second fixed terminal, which includes a second contact portion inside the housing that faces the movable contact piece, and a second terminal portion that protrudes out of the housing and has a curved shape.

6. The electromagnetic relay according to claim 5, characterized in that, The second terminal portion includes: The second flat section; and The second curved portion is curved relative to the second flat portion.

7. The electromagnetic relay according to claim 6, characterized in that, The first curved portion and the second curved portion have shapes that are curved in the same direction relative to the first flat portion and the second flat portion.

8. The electromagnetic relay according to claim 6, characterized in that, The first curved portion and the second curved portion have shapes that are curved in opposite directions relative to the first flat portion and the second flat portion.

9. The electromagnetic relay according to claim 1, characterized in that, The first terminal portion further includes a third curved portion that bends relative to the first flat portion in the same direction as the first curved portion.

10. The electromagnetic relay according to claim 1, characterized in that, The first terminal portion further includes a third curved portion that bends relative to the first flat portion in the opposite direction to the first curved portion.

Images