Electromagnetic relay

Abstract

The utility model provides an electromagnetic relay which is provided with a fixed terminal, a movable contact, a first magnet and a first magnet yoke, the first magnet is provided with a first magnetic pole face, a second magnetic pole face and a first side face connecting the first magnetic pole face and the second magnetic pole face, and the first magnet yoke is provided with a first portion which is arranged on the right portion of the first magnet and comprises a first face located on the right portion of the second magnetic pole face in a contact mode and a second face located on the opposite side of the first face. A first protruding portion located below the first side surface and protruding to the left; and a first recessed portion provided at a position overlapping the first protruding portion and recessed toward the first surface, the first protruding portion having: a first protruding surface facing the first side surface below; a second protruding surface connected to the first protruding surface and the first surface; and a third protruding surface connected to the second protruding surface and the first surface, or connected to the first protruding surface and the first surface, and at least two of the first protruding surface, the second protruding surface, and the third protruding surface have a triangular shape.

Description

Technical Field

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

[0002] Previously, for example, Patent Document 1 disclosed an electromagnetic relay in which the movable contact is separated from the fixed terminal. In order to eliminate the electric arc, a magnet is provided outside the container that houses the movable contact. The electric arc is quickly eliminated by pulling it with the magnetic field of the magnet.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2014-17086 Utility Model Content

[0006] Problems to be solved by utility models

[0007] However, Patent Document 1 mentioned above does not consider the situation of suppressing magnet misalignment used to eliminate arcs. If the magnet is spatially misaligned relative to the movable contact and the fixed terminal, the arc-suppressing capability may be reduced. The purpose of this invention is to provide an electromagnetic relay capable of suppressing magnet misalignment.

[0008] Solution for solving the problem

[0009] As a technical solution of this utility model, an electromagnetic relay is provided, characterized in that it has: a first fixed terminal; a second fixed terminal; and a movable contact that moves upward and downward between a first position and a second position. In the first position, the movable contact contacts the first fixed terminal and the second fixed terminal, electrically connecting the first fixed terminal and the second fixed terminal. In the second position, the movable contact does not contact the first fixed terminal and the second fixed terminal. The movable contact is configured to electrically insulate the first fixed terminal from the second fixed terminal; a first magnet is disposed to the right of the movable contact; and a first yoke is provided, the first magnet having: a first magnetic pole face; a second magnetic pole face located to the right of the first magnetic pole face, the magnetic poles of the second magnetic pole face being different from those of the first magnetic pole face; and a first side surface connecting the first magnetic pole face and the second magnetic pole face, the first yoke having: a first portion disposed to the right of the first magnet, comprising the first side surface and The second surface, wherein the first surface is located to the right of and in contact with the second magnetic pole surface of the first magnet, and the second surface is located on the opposite side of the first surface; a first protrusion, which is located below the first side surface of the first magnet, protruding to the left from the first surface of the first portion; and a first recess, which is provided in the second surface at a position overlapping the first protrusion when viewed in the left-right direction, and recessed towards the first surface, the first protrusion having: a first protrusion A first protruding surface, located below the first side surface of the first magnet and opposite to the first side surface of the first magnet; a second protruding surface, connected to the first protruding surface and the first surface of the first portion; and a third protruding surface, connected to the second protruding surface and the first surface of the first portion, or connected to the first protruding surface and the first surface of the first portion, wherein at least two of the first, second, and third protruding surfaces are triangular in shape.

[0010] Preferably, the depth of the deepest part of the first recess is more than half the distance between the first surface and the second surface of the first magnetic yoke.

[0011] Preferably, the depth of the deepest part of the first recess is greater than the height of the highest part of the first protrusion.

[0012] Preferably, the height of the highest part of the first protrusion is less than half the distance between the first magnetic pole surface and the second magnetic pole surface of the first magnet.

[0013] Preferably, the third protruding surface is connected to the second protruding surface and the first surface of the first portion, and the first protrusion also has a fourth protruding surface connected to the first surface of the first portion, the first protruding surface, and the third protruding surface. The third protruding surface is located below the first protruding surface. The first and third protruding surfaces are triangular in shape, and the second and fourth protruding surfaces are rectangular in shape.

[0014] Preferably, the third protruding surface is connected to the first protruding surface and the first surface of the first portion, and the first protrusion also has a fourth protruding surface connected to the first surface of the first portion, the first protruding surface, and the third protruding surface. The first protruding surface and the fourth protruding surface are rectangular, and the second protruding surface and the third protruding surface are triangular.

[0015] Preferably, the second and third protruding surfaces are triangular shapes whose height decreases as they face downwards.

[0016] Preferably, the first magnetic yoke further comprises a second magnet located to the left of the movable contact, and the first magnetic yoke further comprises: a second portion located to the left of the second magnet, including a third surface in contact with the second magnet and a fourth surface located on the opposite side of the third surface; a second protrusion located below the second magnet, protruding to the right from the third surface of the second portion; and a second recess located on the fourth surface, at a position overlapping the second protrusion when viewed in the left-right direction, recessed towards the third surface.

[0017] Preferably, the second magnet has: a third magnetic pole face; a fourth magnetic pole face located to the left of the third magnetic pole face, the magnetic poles of the fourth magnetic pole face being different from those of the third magnetic pole face; and a second side face connecting the third magnetic pole face and the fourth magnetic pole face. The second protrusion has: a fifth protrusion face located below the second side face of the second magnet and opposite to the second side face of the second magnet; a sixth protrusion face connected to the fifth protrusion face and the third face of the second portion; and a seventh protrusion face connected to the sixth protrusion face and the third face of the second portion, or connected to the fifth protrusion face and the third face of the second portion. At least two of the fifth, sixth, and seventh protrusion faces are triangular in shape.

[0018] Preferably, the device also includes a container disposed between the first magnet and the second magnet, the movable contact being disposed inside the container, a gap smaller than the thickness of the first magnet being formed between the highest portion of the first protrusion and the container, and a gap smaller than the thickness of the second magnet being formed between the highest portion of the second protrusion and the container.

[0019] Preferably, it also has a housing having a top surface above the first magnetic yoke, covering the first magnetic yoke and the magnet, the first magnetic yoke being fixed by pressing into the top surface of the housing, the second fixing terminal being disposed to the left of the first fixing terminal, and the movable contact being disposed below the first fixing terminal and the second fixing terminal.

[0020] Effects of the utility model

[0021] The electromagnetic relay according to this invention can effectively suppress the downward misalignment of the magnet, so that the arc elimination based on the magnet can be stably achieved. Attached Figure Description

[0022] Figure 1 This is a perspective view of the electromagnetic relay of this utility model after the upper housing has been removed.

[0023] Figure 2 This is a perspective view of the electromagnetic relay of this utility model.

[0024] Figure 3 This is a top view of the electromagnetic relay of this utility model.

[0025] Figure 4 yes Figure 3 A sectional view from the AA direction.

[0026] Figure 5 This is a top view of the electromagnetic relay of this utility model after the upper housing has been removed.

[0027] Figure 6 This is a perspective view of the first magnetic yoke of the electromagnetic relay of this utility model.

[0028] Figure 7 This is a perspective view of the first protrusion of the first magnetic yoke of this utility model.

[0029] Figure 8 This is a perspective view of the first protrusion of the first magnetic yoke of this utility model from another angle.

[0030] Figure 9 This is a perspective view of the first magnetic yoke of the electromagnetic relay of this utility model from another angle.

[0031] Figure 10This is a schematic diagram of a modified example of the first protrusion of this utility model.

[0032] Figure 11 This is a schematic diagram showing the dimensional relationships of this utility model.

[0033] Explanation of reference numerals in the attached figures

[0034] 100. Electromagnetic relay; 10. First fixed terminal; 20. Second fixed terminal; 30. Movable contact; 40. First magnet; 41. First magnetic pole face; 42. Second magnetic pole face; 43. First side face; 50. First magnetic yoke; 51. First part; 51a. First surface; 51b. Second surface; 52. First protrusion; 52a. First protruding surface; 52b. Second protruding surface; 52c. Third protruding surface; 52d. Fourth protruding surface; 5 3. First recess; 54. Second part; 54a. Third surface; 54b. Fourth surface; 55. Second protrusion; 55a. Fifth protruding surface; 55b. Sixth protruding surface; 55c. Seventh protruding surface; 55d. Eighth protruding surface; 56. Second recess; 57. Claw; 60. Second magnet; 61. Third magnetic pole surface; 62. Fourth magnetic pole surface; 63. Second side surface; 70. Shell; 71. Top surface; 80. Container; 90. Second yoke. Detailed Implementation

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. However, this utility model is not limited to the drawings and the following description. Furthermore, for ease of explanation, the terms "upper," "lower," "left," "right," "front," and "rear" are used in the specification and claims. Those skilled in the art will understand that these terms only indicate relative positional relationships and do not limit the actual installation direction. "Upper," "lower," "left," "right," "front," and "rear" correspond to "+Z," "-Z," "-Y," "+Y," "+X," and "-X" in the accompanying drawings, respectively.

[0036] (1. Summary)

[0037] The electromagnetic relay 100 of this embodiment includes: a first fixed terminal 10; a second fixed terminal 20; and a movable contact 30 that moves upward and downward between a first position and a second position. In the first position, the movable contact 30 contacts the first fixed terminal 10 and the second fixed terminal 20, electrically connecting them. In the second position, the movable contact 30 does not contact the first fixed terminal 10 and the second fixed terminal 20, thus connecting them. Electrically insulated; a first magnet 40 located to the right of the movable contact 30; and a first yoke 50, the first magnet 40 having: a first magnetic pole surface 41; a second magnetic pole surface 42 located to the right of the first magnetic pole surface 41, the magnetic poles of the second magnetic pole surface 42 being different from the magnetic poles of the first magnetic pole surface 41; and a first side surface 43 connecting the first magnetic pole surface 41 and the second magnetic pole surface 42, the first yoke 50 having: a first portion 51 located to the right of the first magnet 40, comprising a first surface 51a and a second surface 51b, the first surface 51a... Located to the right of and in contact with the second magnetic pole surface 42 of the first magnet 40, the second surface 51b is located on the opposite side of the first surface 51a; a first protrusion 52 is located below the first side surface 43 of the first magnet 40, protruding to the left from the first surface 51a of the first part 51; a first recess 53 is provided in the second surface 51b at a position overlapping with the first protrusion 52 when viewed in the left-right direction, recessed towards the first surface 51a, the first protrusion 52 having: a first protruding surface 52a, which is located on the right of and in contact with the second magnetic pole surface 42 of the first magnet 40, the second surface 51b is located on the opposite side of the first surface 51a; a first protruding part 52 is located below the first side surface 43 of the first magnet 40, protruding to the left from the first surface 51a of the first part 51; a first recess 53 is provided in the second surface 51b at a position overlapping with the first protrusion 52 when viewed in the left-right direction, recessed towards the first surface 51a, the first protruding part 52 having: a first protruding surface 52a, which is located on the right of and opposite to the first surface 51a of the first magnet 40, the second surface 51b is located on the opposite side of the first surface 51a; a first protruding part 52 is located below the first side surface 43 of the first magnet 40, protruding to the left from the first surface 51a of the first part ..., the second surface 51b is located on the opposite side of the first surface 51a; a first protruding part 5 Below the first side surface 43 of the magnet 40, opposite to the first side surface 43 of the magnet 40; a second protruding surface 52b, which is connected to the first protruding surface 52a and the first surface 51a of the first part 51; a third protruding surface 52c, which is connected to the second protruding surface 52b and the first surface 51a of the first part 51, or connected to the first protruding surface 52a and the first surface 51a of the first part 51, wherein at least two of the first protruding surface 52a, the second protruding surface 52b and the third protruding surface 52c are triangular in shape.

[0038] Preferably, the depth d1 of the deepest part of the first recess 53 is more than half of the distance d3 between the first surface 51a and the second surface 51b of the first magnetic yoke 50.

[0039] Preferably, the depth d1 of the deepest part of the first recess 53 is greater than the height d2 of the highest part of the first protrusion 52.

[0040] Preferably, the height d2 of the highest part of the first protrusion 52 is less than half the distance d4 between the first magnetic pole surface 41 and the second magnetic pole surface 42 of the first magnet 40.

[0041] Preferably, the third protruding surface 52c is connected to the second protruding surface 52b and the first surface 51a of the first portion 51. The first protruding portion 52 also has a fourth protruding surface 52d connected to the first surface 51a, the first protruding surface 52a and the third protruding surface 52c of the first portion 51. The third protruding surface 52c is located below the first protruding surface 52a. The first protruding surface 52a and the third protruding surface 52c are triangular in shape, and the second protruding surface 52b and the fourth protruding surface 52d are rectangular in shape.

[0042] Preferably, the third protruding surface 52c is connected to the first protruding surface 52a and the first surface 51a of the first portion 51, and the first protruding portion 52 also has a fourth protruding surface 52d connected to the first surface 51a, the first protruding surface 52a and the third protruding surface 52c of the first portion 51. The first protruding surface 52a and the fourth protruding surface 52d are rectangular, and the second protruding surface 52b and the third protruding surface 52c are triangular.

[0043] Preferably, the second protruding surface 52b and the third protruding surface 52c are triangular shapes whose height decreases as they face downwards.

[0044] Preferably, the electromagnetic relay 100 further includes a second magnet 60 located to the left of the movable contact 30, and the first yoke 50 further includes: a second portion 54 located to the left of the second magnet 60, comprising a third surface 54a in contact with the second magnet 60 and a fourth surface 54b located on the opposite side of the third surface 54a; a second protrusion 55 located below the second magnet 60, protruding to the right from the third surface 54a of the second portion 54; and a second recess 56 located in the fourth surface 54b, at a position overlapping the second protrusion 55 when viewed in the left-right direction, recessed towards the third surface 54a.

[0045] Preferably, the second magnet 60 has: a third magnetic pole surface 61; a fourth magnetic pole surface 62 located to the left of the third magnetic pole surface 61, the magnetic poles of the fourth magnetic pole surface 62 being different from those of the third magnetic pole surface 61; and a second side surface 63 connecting the third magnetic pole surface 61 and the fourth magnetic pole surface 62. The second protrusion 55 has: a fifth protrusion surface 55a located below the second side surface 63 of the second magnet 60, and adjacent to the second side surface 61 of the second magnet 60. 3 opposite; a sixth protruding surface 55b, which is connected to the fifth protruding surface 55a and the third surface 54a of the second portion 54; and a seventh protruding surface 55c, which is connected to the sixth protruding surface 55b and the third surface 54a of the second portion 54, or connected to the fifth protruding surface 55a and the third surface 54a of the second portion 54, wherein at least two of the fifth protruding surface 55a, the sixth protruding surface 55b and the seventh protruding surface 55c are triangular in shape.

[0046] Preferably, the electromagnetic relay 100 further includes a container 80 disposed between the first magnet 40 and the second magnet 60, a movable contact 30 disposed inside the container 80, a gap smaller than the thickness of the first magnet 40 formed between the highest part of the first protrusion 52 and the container 80, and a gap smaller than the thickness of the second magnet 60 formed between the highest part of the second protrusion 55 and the container 80.

[0047] Preferably, the electromagnetic relay 100 also has a housing 70, which has a top surface 71 above the first yoke 50, covering the first yoke 50 and the magnet. The first yoke 50 is fixed by pressing it into the top surface 71 of the housing 70. The second fixed terminal 20 is disposed to the left of the first fixed terminal 10. A movable contact 30 is disposed below the first fixed terminal 10 and the second fixed terminal 20.

[0048] (2. Detailed Structure)

[0049] (2-1. Overall)

[0050] exist Figure 1 The image shows a perspective view of the electromagnetic relay 100 after a portion of the housing 70 (upper housing) has been removed. Figure 2 This is a perspective view of the electromagnetic relay 100 of this utility model without removing the housing 70. Figure 3 This is a top view of the electromagnetic relay 100.

[0051] like Figure 1 As shown, the electromagnetic relay 100 has a first fixed terminal 10 and a second fixed terminal 20 protruding upwards. (As indicated...) Figure 2 As shown, with the housing 70 installed, the first fixing terminal 10 and the second fixing terminal 20 are connected via a portion 71 provided on the top surface of the housing 70 (see reference). Figure 3 The through hole protrudes upward relative to the top surface 71.

[0052] The electromagnetic relay 100 has a housing 70 with a top surface 71 above the first magnetic yoke 50, covering the first magnetic yoke 50 and the magnets (first magnet 40 and second magnet 60). The first magnetic yoke 50 is fixed by pressing it into the top surface 71 of the housing 70. The second fixed terminal 20 is disposed to the left (-Y side) of the first fixed terminal 10. A movable contact 30 is disposed below the first fixed terminal 10 and the second fixed terminal 20.

[0053] like Figure 1As shown, a container 80 is housed within the housing 70. The internal structure of the container 80 will be described later. A first magnet 40 and a second magnet 60 are respectively disposed on the +Y and -Y sides of the container 80, that is, the container 80 is disposed between the first magnet 40 and the second magnet 60. A first yoke 50 and a second yoke 90 are respectively disposed on the -X and +X sides of the container 80, that is, the container 80 is disposed between the first yoke 50 and the second yoke 90. The first yoke 50 and the second yoke 90 are roughly shaped like the Japanese character "コ". By being disposed on the -X and +X sides of the container 80, the first yoke 40 and the second magnet 60 surround the outer periphery of the container 80, the first magnet 40 and the second magnet 60, that is, surround the -X and +X sides of the container 80, and the +Y side of the first magnet 40 and the -Y side of the second magnet 60. The first magnetic yoke 50 and the second magnetic yoke 90 each have a gap between their two ends.

[0054] In container 80, the first fixed terminal 10 and the second fixed terminal 20 are arranged along the Y direction. The first fixed terminal 10 is located inside container 80 on the +Y side and is opposite to the first magnet 40 located outside container 80 on the +Y side in the Y direction. The second fixed terminal 20 is located inside container 80 on the -Y side and is opposite to the second magnet 60 located outside container 80 on the -Y side in the Y direction.

[0055] Figure 3 This is a top view of the electromagnetic relay 100. Figure 3 The top surface 71 of the housing 70 can be seen, which covers the first yoke 50 and the second yoke 90. The inner surface of the top surface 71 has a hole (not shown). The first yoke 50 and the second yoke 90 have protrusions. By pressing the protrusions into the holes, the first yoke 50 and the second yoke 90 are pressed into and fixed to the top surface 71 of the housing 70.

[0056] Figure 4 As Figure 3 The sectional view taken from angle AA downwards shows the internal structure of container 80. Electromagnetic relay 100 has a movable contact 30 inside container 80, located below the first fixed terminal 10 and the second fixed terminal 20. The movable contact 30 moves upwards and downwards between a first position and a second position. In the first position, the movable contact 30 contacts the first fixed terminal 10 and the second fixed terminal 20, electrically connecting them. In the second position, the movable contact 30 does not contact the first fixed terminal 10 and the second fixed terminal 20, electrically insulating them. Figure 4 The image shows position 2, with position 1 positioned above position 2.

[0057] Alternatively, the movable contact 30 may be located above the first fixed terminal 10 and the second fixed terminal 20. Furthermore, the first fixed terminal 10 and the second fixed terminal 20 are arranged in a left-right direction. Figure 4 The first magnet 40 and the second magnet 60 are arranged in the same left-right direction as the first fixed terminal 10 and the second fixed terminal 20. In this case, the magnetic poles of the first magnetic pole surface 41 and the third magnetic pole surface 61 can be different.

[0058] However, the arrangement direction of the first magnet 40 and the second magnet 60 can also be different from the arrangement direction of the first fixed terminal 10 and the second fixed terminal 20. For example, the arrangement direction of the first magnet 40 and the second magnet 60 can be front-to-back. Conversely, the arrangement direction of the first magnet 40 and the second magnet 60 can be left-to-right, and the arrangement direction of the first fixed terminal 10 and the second fixed terminal 20 can be front-to-back. When the arrangement direction of the first magnet 40 and the second magnet 60 is different from the arrangement direction of the first fixed terminal 10 and the second fixed terminal 20, the magnetic poles of the first magnetic pole surface 41 and the third magnetic pole surface 61 can be the same.

[0059] Similarly, as Figure 4 As shown, the first magnetic pole surface 41 faces the outer wall of the container 80 on the right (+Y side), and the third magnetic pole surface 61 faces the outer wall of the container 80 on the left (-Y side). The movable contact 30 housed in the container 80 moves in the vertical direction, thereby moving between positions of contact and separation with the first fixed terminal 10 and the second fixed terminal 20. The first magnet 40 and the second magnet 60 extend throughout the range of movement of the movable contact 30 in the vertical direction. More preferably, the lower ends of the first magnet 40 and the second magnet 60 are lower than the lower limit of the range of movement of the movable contact 30, and the upper ends of the first magnet 40 and the second magnet 60 are approximately flush with the upper surface of the container 80.

[0060] like Figure 4 As shown, the first magnet 40 is located on the +Y side of the movable contact 30 (refer to...). Figure 1 (To the right) At least a portion of the first magnetic yoke 50 is disposed on the +Y side of the first magnet 40. The first magnet 40 has: a first magnetic pole surface 41 facing the container 80; a second magnetic pole surface 42 located on the +Y side of the first magnetic pole surface 41, which is the opposite side to the side where the container 80 is located, and the magnetic poles of the second magnetic pole surface 42 are different from the magnetic poles of the first magnetic pole surface 41; and a first side surface 43 connecting the first magnetic pole surface 41 and the second magnetic pole surface 42, the first side surface 43 being, for example, the bottom surface of the first magnet 40.

[0061] Similarly, as Figure 4 As shown, the second magnet 60 is located on the -Y side of the movable contact 30 (refer to...). Figure 1(To the left) At least a portion of the first magnetic yoke 50 is disposed on the -Y side of the second magnet 60. The second magnet 60 has: a third magnetic pole surface 61 facing the container 80; a fourth magnetic pole surface 62 located on the -Y side of the third magnetic pole surface 61, which is the side opposite to the side where the container 80 is located, and the magnetic poles of the fourth magnetic pole surface 62 are different from those of the third magnetic pole surface 61; and a second side surface 63 connecting the third magnetic pole surface 61 and the fourth magnetic pole surface 62, the second side surface 63 being, for example, the bottom surface of the second magnet 60.

[0062] Figure 5 This is a top view of the electromagnetic relay 100 after the upper housing has been removed. Figure 5 The image shows claws 57 that restrict the upward movement of the first magnet 40 and the second magnet 60 from above. The number, location, and specific structural form of the claws 57 are not limited, and can be arbitrarily changed as long as they can restrict the upward movement of the magnets.

[0063] (2-2. First Magnetic Yoke 50)

[0064] The following is for reference Figures 6-9 The structure of the first magnetic yoke 50 will be explained.

[0065] like Figure 6 , Figure 9 As shown, the first magnetic yoke 50 has: a first portion 51, which includes a first surface 51a and a second surface 51b, the first surface 51a being located to the right (+Y side) of the second magnetic pole surface 42 of the first magnet 40 and in contact with the second magnetic pole surface 42, and the second surface 51b being located on the opposite side of the first surface 51a; a first protrusion 52, which is located below the first side surface 43 of the first magnet 40 and protrudes to the left (-Y side) from the first surface 51a of the first portion 51; and a first recess 53, which is provided in the second surface 51b at a position that overlaps with the first protrusion 52 when viewed in the left-right direction (Y direction) and is recessed toward the first surface 51a.

[0066] like Figure 4 , Figure 7 , Figure 8 As shown, the first protrusion 52 has: a first protruding surface 52a, which is located below the first side surface 43 of the first magnet 40 and opposite to the first side surface 43 of the first magnet 40; a second protruding surface 52b, which is connected to the first protruding surface 52a and the first surface 51a of the first portion 51; and a third protruding surface 52c, which is connected to the second protruding surface 52b and the first surface 51a of the first portion 51. In this embodiment, at least two of the first protruding surface 52a, the second protruding surface 52b, and the third protruding surface 52c are triangular in shape.

[0067] The first protrusion 52 also has a fourth protrusion 52d connected to the first surface 51a, the first protruding surface 52a and the third protruding surface 52c of the first part 51. The third protruding surface 52c is located below the first protruding surface 52a. The first protruding surface 52a and the third protruding surface 52c are triangular in shape, and the second protruding surface 52b and the fourth protruding surface 52d are rectangular in shape.

[0068] like Figure 6 , Figure 9 As shown, the first magnetic yoke 50 further comprises: a second portion 54, which includes a third surface 54a and a fourth surface 54b, the third surface 54a being located to the left (-Y side) of the fourth magnetic pole surface 62 of the second magnet 60 and in contact with the fourth magnetic pole surface 62, and the fourth surface 54b being located on the opposite side of the third surface 54a; a second protrusion 55, which is located below the second side surface 63 of the second magnet 60 and protrudes to the right (+Y side) from the third surface 54a of the second portion 54; and a second recess 56, which is provided in the fourth surface 54b at a position that overlaps with the second protrusion 55 when viewed in the left-right direction (Y direction) and is recessed toward the third surface 54a.

[0069] like Figure 4 , Figure 9 As shown, the second protrusion 55 has: a fifth protruding surface 55a, which is located below and opposite to the second side surface 63 of the second magnet 60; a sixth protruding surface 55b, which is connected to the fifth protruding surface 55a and the third surface 54a of the second portion 54; and a seventh protruding surface 55c, which is connected to the sixth protruding surface 55b and the third surface 54a of the second portion 54. In this embodiment, at least two of the fifth protruding surface 55a, the sixth protruding surface 55b, and the seventh protruding surface 55c are triangular in shape.

[0070] The second protrusion 55 also has an eighth protrusion 55d connected to the third surface 54a, the fifth protrusion 55a and the seventh protrusion 55c of the second part 54. The seventh protrusion 55c is located below the fifth protrusion 55a. The fifth protrusion 55a and the seventh protrusion 55c are triangular in shape, and the sixth protrusion 55b and the eighth protrusion 55d are rectangular in shape.

[0071] The first protrusion 52 is formed, for example, by stamping. However, in this stamping process, the shape of the stamped first protrusion 52 is not made uniform in the direction of its protrusion height. In other words, the first protrusion 52 does not protrude as a whole by a predetermined amount; it can be said that the different parts of the first protrusion 52 have different protrusion amounts. Figure 7As shown, the protrusion amount gradually increases from the junction of the fourth protruding surface 52d and the first surface 51a towards the junction of the second protruding surface 52b and the fourth protruding surface 52d, and gradually decreases from the junction of the second protruding surface 52b and the fourth protruding surface 52d towards the junction of the second protruding surface 52b and the first surface 51a. That is, the first protrusion 52 has a structure such that, from the position where the protrusion amount of the first protrusion 52 is greatest (e.g., ...), the amount of protrusion increases. Figure 7 The second protruding surface 52b and the fourth protruding surface 52d are aligned with the first surface 51a, and the cross-sectional area of ​​the first protrusion 52 (parallel to the first surface 51a) gradually increases. Therefore, compared to a structure where the cross-sectional area of ​​the first protrusion 52 is uniform, the strength reduction caused by stamping can be significantly suppressed.

[0072] Figure 10 This is a schematic diagram of a modified example of the first protrusion 52. Figures 6-9 In the middle, the amount of protrusion of the first protrusion 52 is different in the front-to-back direction. Figure 10 In a modified example, the amount of protrusion of the first protrusion 52 is different in the vertical direction. The first protrusion 52 also has a first protruding surface 52a, a second protruding surface 52b, a third protruding surface 52c, and a fourth protruding surface 52d. The first protruding surface 52a is located below the first side surface 43 of the first magnet 40 and is a rectangular shape facing the +Z side, used to support the first magnet 40. The second protruding surface 52b and the third protruding surface 52c are the two side surfaces of the first protrusion 52 in the front-rear direction and are triangular shapes whose height decreases as they face downwards. The second protruding surface 52b and the third protruding surface 52c are both connected to the first protruding surface 52a and the first surface 51a of the first part 51. The second protruding surface 52b and the third protruding surface 52c face the +X side and the -X side, respectively. The fourth protruding surface 52d is a rectangular shape facing the -Y and -Z sides (i.e., facing the lower left side), and it is connected to the first protruding surface 52a, the second protruding surface 52b, the third protruding surface 52c and the first surface 51a of the first part 51.

[0073] The various structures of the first protrusion 52 have been described above. However, it should be noted that the structure of the first protrusion 52 is not limited to the above structures; it can be any structure as long as it can abut against the magnet from below. By using the first protrusion 52 to support the first magnet 40, downward misalignment of the magnet can be effectively suppressed, allowing for stable arc elimination based on the magnet. Similarly, by using the second protrusion 55 to support the second magnet 60, the same effect can be achieved.

[0074] Preferably, the shape of the second protrusion 55 is the same as the shape of the first protrusion 52, and the shape of the second recess 56 is the same as the shape of the first recess 53. However, the shape of the second protrusion 55 may also be different from the shape of the first protrusion 52. The second protrusion 55 may be formed at a position corresponding to the first protrusion 52 in the left-right direction, or it may be formed at a position not corresponding to the first protrusion 52 in the left-right direction. As long as the first protrusion 52 and the second protrusion 55 can abut against the magnet from below to prevent the magnet from falling, they can have any shape; they can be the same or different, and they can be formed at corresponding or non-corresponding positions.

[0075] Figure 11 This is a schematic diagram showing dimensional relationships, corresponding to along... Figures 7-8 The cross-sectional view is obtained by cutting along the junction of the second protruding surface 52b and the fourth protruding surface 52d. Figure 11 In the diagram, d1 represents the depth of the deepest part of the first recess 53, d2 represents the height of the highest part of the first protrusion 52, that is, the height of the highest part of the first protrusion 52 protruding from the first surface 51a of the first part 51. d3 represents the distance between the first surface 51a and the second surface 51b of the first yoke 50. d4 represents the distance between the first magnetic pole surface 41 and the second magnetic pole surface 42 of the first magnet 40. d5 represents the gap between the highest part of the first protrusion 52 and the container 80.

[0076] exist Figure 11 In this context, the following relationships are satisfied: the depth d1 of the deepest part of the first recess 53 is more than half of the distance d3 between the first surface 51a and the second surface 51b of the first magnetic yoke 50. The depth d1 of the deepest part of the first recess 53 is greater than the height d2 of the highest part of the first protrusion 52. The height d2 of the highest part of the first protrusion 52 is less than half of the distance d4 between the first magnetic pole surface 41 and the second magnetic pole surface 42 of the first magnet 40.

[0077] The gap d5 formed between the highest part of the first protrusion 52 and the container 80 is smaller than the thickness d4 of the first magnet 40. Similarly, the gap between the highest part of the second protrusion 55 and the container 80 is smaller than the thickness of the second magnet 60.

[0078] As described above, by making the height d2 of the highest part of the first protrusion 52 smaller than half the distance d4 between the first magnetic pole surface 41 and the second magnetic pole surface 42 of the first magnet 40, magnetic short circuits of the first magnet 40 caused by the first protrusion 52 can be prevented. Similarly, with regard to the height of the highest part of the second protrusion 55, by making this height smaller than half the distance between the third magnetic pole surface 61 and the fourth magnetic pole surface 62 of the second magnet 60, magnetic short circuits of the second magnet 60 caused by the second protrusion 55 can be prevented.

[0079] From the perspective of ease of processing, it is preferable to form the first protrusion 52 by stamping. As a result, the depth d1 of the deepest part of the first recess 53 is greater than the height d2 of the highest part of the first protrusion 52. Furthermore, as mentioned above, since the first protrusion 52 does not protrude as a whole by a predetermined amount, it can be said that the protrusion amounts of each part of the first protrusion 52 are different. Therefore, compared to a structure in which the cross-sectional area of ​​the first protrusion 52 is uniform, the decrease in strength caused by stamping can be significantly suppressed.

[0080] By making the gap d5 formed between the highest part of the first protrusion 52 and the container 80 smaller than the thickness d4 of the first magnet 40, the first magnet 40 can be reliably supported, thereby effectively suppressing downward misalignment of the magnet and enabling stable arc elimination based on the magnet.

Claims

1. An electromagnetic relay, characterized in that, have: First fixed terminal; Second fixed terminal; A movable contact moves upward and downward between a first position and a second position. In the first position, the movable contact contacts the first fixed terminal and the second fixed terminal, electrically connecting the first fixed terminal and the second fixed terminal. In the second position, the movable contact does not contact the first fixed terminal and the second fixed terminal, electrically insulating the first fixed terminal from the second fixed terminal. A first magnet is located to the right of the movable contact; and First magnetic yoke, The first magnet has: First magnetic pole face; A second magnetic pole face, located to the right of the first magnetic pole face, wherein the magnetic poles of the second magnetic pole face are different from those of the first magnetic pole face; and The first side surface connects the first magnetic pole surface and the second magnetic pole surface. The first magnetic yoke has: The first part, located to the right of the first magnet, includes a first surface and a second surface. The first surface is located to the right of the second magnetic pole surface of the first magnet and is in contact with the second magnetic pole surface. The second surface is located on the opposite side of the first surface. The first protrusion is located below the first side surface of the first magnet and protrudes to the left from the first surface of the first part; as well as The first recess, located on the second surface, overlaps with the first protrusion when viewed in a left-right direction, and is recessed towards the first surface. The first protrusion has: The first protruding surface is located below the first side surface of the first magnet and is opposite to the first side surface of the first magnet; The second protruding surface is connected to the first protruding surface and the first surface of the first portion; as well as The third protruding surface is connected to the second protruding surface and the first surface of the first portion, or it is connected to the first protruding surface and the first surface of the first portion. At least two of the first, second, and third protruding surfaces are triangular in shape.

2. The electromagnetic relay according to claim 1, characterized in that, The deepest part of the first recess is more than half the distance between the first surface and the second surface of the first magnetic yoke.

3. The electromagnetic relay according to claim 1, characterized in that, The depth of the deepest part of the first recess is greater than the height of the highest part of the first protrusion.

4. The electromagnetic relay according to claim 1, characterized in that, The height of the highest part of the first protrusion is less than half the distance between the first magnetic pole face and the second magnetic pole face of the first magnet.

5. The electromagnetic relay according to claim 1, characterized in that, The third protruding surface is connected to the second protruding surface and the first surface of the first portion. The first protrusion also has a fourth protrusion that is connected to the first surface, the first protruding surface, and the third protruding surface of the first portion. The third protruding surface is located below the first protruding surface. The first protruding surface and the third protruding surface are triangular in shape. The second and fourth protruding surfaces are rectangular.

6. The electromagnetic relay according to claim 1, characterized in that, The third protruding surface is connected to the first protruding surface and the first surface of the first portion. The first protrusion also has a fourth protrusion that is connected to the first surface, the first protruding surface, and the third protruding surface of the first portion. The first protruding surface and the fourth protruding surface are rectangular. The second and third protruding surfaces are triangular in shape.

7. The electromagnetic relay according to claim 6, characterized in that, The second and third protruding surfaces are triangular shapes whose height decreases as they face downwards.

8. The electromagnetic relay according to claim 1, characterized in that, It also has a second magnet located to the left of the movable contact. The first magnetic yoke also has: The second part, located to the left of the second magnet, includes a third surface in contact with the second magnet and a fourth surface located on the opposite side of the third surface; A second protrusion, located below the second magnet, protrudes to the right from the third surface of the second portion; and The second recess is located on the fourth surface, at a position that overlaps with the second protrusion when viewed in the left-right direction, and is recessed toward the third surface.

9. The electromagnetic relay according to claim 8, characterized in that, The second magnet has: 3rd magnetic pole face; A fourth magnetic pole face, located to the left of the third magnetic pole face, wherein the magnetic poles of the fourth magnetic pole face are different from those of the third magnetic pole face; and The second side connects the third magnetic pole surface and the fourth magnetic pole surface. The second protrusion has: The fifth protruding surface is located below the second side surface of the second magnet and opposite to the second side surface of the second magnet; The sixth protruding surface is connected to the fifth protruding surface and the third surface of the second portion; as well as The seventh protruding surface is connected to the sixth protruding surface and the third surface of the second portion, or it is connected to the fifth protruding surface and the third surface of the second portion. At least two of the fifth, sixth, and seventh protruding surfaces are triangular in shape.

10. The electromagnetic relay according to claim 8, characterized in that, It also includes a container disposed between the first magnet and the second magnet, and the movable contact is disposed inside the container. A gap smaller than the thickness of the first magnet is formed between the highest part of the first protrusion and the container. A gap smaller than the thickness of the second magnet is formed between the highest part of the second protrusion and the container.

11. The electromagnetic relay according to any one of claims 1 to 10, characterized in that, It also has a housing having a top surface above the first yoke, covering the first yoke and the first magnet. The first magnetic yoke is fixed by being pressed into the top surface of the housing. The second fixing terminal is positioned to the left of the first fixing terminal. The movable contact is disposed below the first fixed terminal and the second fixed terminal.

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