Electromagnetic relay

Abstract

To prevent restriking of arc at a contact in an electromagnetic relay.SOLUTION: An electromagnetic relay comprises a case, a first fixed terminal, a second fixed terminal, a movable contact piece, a first magnet, a gas passage, a partition member. The case includes: a housing space; and a lateral wall covering the housing space from a first direction. The housing space includes a first space and a second space. The first fixed terminal includes a first fixed contact disposed in the first space. The second fixed terminal includes a second fixed contact disposed in the second space. The movable contact piece includes a first movable contact and a second movable contact. The first magnet extends first arc, generated between the first fixed contact and the first movable contact, in the first direction. The gas passage is located between the lateral wall and the movable contact piece. The gas passage includes: an inflow port communicating with the first space; and an outflow port communicating with the second space. The partition member is disposed between the movable contact piece and the gas passage, and it partitions off the first space and the second space from the gas passage.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an electromagnetic relay.

Background Art

[0002] When an electromagnetic relay interrupts current, an arc is generated at the contact. When the temperature of the contact rises due to this arc, the contact may melt and generate a high-temperature gas containing metal vapor. If this high-temperature gas stays near the contact, the insulation performance between the contacts may deteriorate, and the arc may reignite. To prevent this reignition of the arc, the electromagnetic relay disclosed in Patent Document 1 provides an arc extinguishing space for extinguishing the arc, a gas inflow space separate from the arc extinguishing space, and a gas passage for discharging the high-temperature gas from the arc extinguishing space to the gas inflow space inside the case.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the electromagnetic relay of Patent Document 1, the inlet and outlet of the gas passage are arranged near the contact. Therefore, the high-temperature gas easily returns to the contact through the gas passage. As the load capacity increases, the amount of high-temperature gas returning to the vicinity of the contact also increases, so there is a risk of the arc reigniting.

[0005] An object of the present invention is to suppress the reignition of an arc generated at a contact in an electromagnetic relay.

Means for Solving the Problems

[0006] An electromagnetic relay according to one aspect of the present invention includes a case, a first fixed terminal, a second fixed terminal, a movable contact piece, a first magnet, a gas flow path, and a partitioning member. The case includes a housing space and a side wall that covers the housing space from a first direction. The housing space includes a first space and a second space. The first fixed terminal includes a first fixed contact disposed in the first space and a first external connection portion protruding from the side wall in the first direction. The second fixed terminal is disposed away from the first fixed terminal. The second fixed terminal includes a second fixed contact disposed in the second space and a second external connection portion protruding from the side wall in the first direction. The movable contact piece is disposed across the first space and the second space. The movable contact piece includes a first movable contact facing the first fixed contact and a second movable contact facing the second fixed contact. The first magnet extends a first arc generated between the first fixed contact and the first movable contact in the first direction. The gas flow path is disposed between the side wall and the movable contact piece. The gas flow path includes an inlet communicating with the first space and an outlet communicating with the second space. The partitioning member is disposed between the movable contact piece and the gas flow path and partitions the first space and the second space from the gas flow path.

[0007] In this electromagnetic relay, the gas flow path disposed between the side wall and the movable contact piece allows the high-temperature gas generated by the first arc to escape from the first space to the second space, so that the retention of the high-temperature gas generated by the first arc in the first space can be suppressed. Further, since the outlet of the gas flow path communicates with the second space, the outlet will be disposed at a position away from the first fixed contact. For this reason, it is difficult for the high-temperature gas flowing from the first space to the second space through the gas flow path to return to the first space. Thereby, restriking of the first arc can be suppressed.

[0008] The electromagnetic relay may further include a second magnet that extends a second arc generated between the second fixed contact and the second movable contact in a second direction opposite to the first direction. In this case, since the second arc will be extended in a direction away from the outlet, restriking of the second arc can be suppressed.

[0009] The electromagnetic relay may further include a driving device that is arranged in the second direction with respect to the first space and the second space, and that moves the movable contact piece in a moving direction including a direction in which the first movable contact approaches the first fixed contact and a direction in which the first movable contact moves away from the first fixed contact. In this case, in the electromagnetic relay in which the driving device is arranged in the second direction with respect to the first space and the second space, reignition of the first arc can be suppressed.

[0010] The second space may communicate with the space in which the driving device is arranged. In this case, the high-temperature gas due to the second arc can be released into the space in which the driving device is arranged.

[0011] The first magnet may be arranged such that as the first arc extends in the first direction, the first arc extends in a direction approaching the first magnet. The case may be arranged between the first magnet and the movable contact piece and may include an arc contact surface against which the first arc abuts. The inlet of the gas flow path may face the arc contact surface. In this case, the high-temperature gas due to the first arc can be efficiently guided into the gas flow path.

[0012] The inlet of the gas flow path may include a tapered portion that expands toward the arc contact surface. In this case, the high-temperature gas due to the first arc can be more efficiently guided into the gas flow path.

[0013] The partitioning member may include a tapered surface that inclines in a direction approaching the side wall toward the arc contact surface. In this case, the high-temperature gas due to the first arc can be more efficiently guided into the gas flow path.

[0014] The partitioning member may be arranged farther from the arc contact surface than the tapered surface and may further include a convex portion that protrudes in the second direction opposite to the first direction toward the movable contact piece. In this case, the convex portion can suppress the high-temperature gas flowing from the first space to the second space through the gas flow path from returning near the first movable contact.

[0015] The partition member may be separate from the side wall of the case. In this case, the partition member can be formed of a material with excellent arc extinguishing performance.

[0016] The electromagnetic relay is separate from the side wall of the case, is disposed between the side wall and the partition member, and may further include a flow path member that constitutes a gas flow path. In this case, the flow path member can be formed of a material with excellent arc extinguishing performance.

Advantages of the Invention

[0017] According to the present invention, in an electromagnetic relay, it is to suppress reignition of an arc generated at a contact.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0019] Hereinafter, the electromagnetic relay 1 according to the embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, the electromagnetic relay 1 includes a case 2, a contact device 3, and a drive device 4.

[0020] In the following description, the direction in which the contact device 3 and the drive device 4 are arranged with respect to the base 21 described later in Case 2 is the upward direction (an example of the second direction), the opposite direction is the downward direction (an example of the first direction), the direction in which the contact device 3 is arranged with respect to the drive device 4 is the forward direction, the opposite direction is the rearward direction, and the left - right direction of the paper surface of FIG. 3 is the left - right direction for explanation. However, these directions are defined for the convenience of explanation and do not limit the arrangement direction of the electromagnetic relay 1.

[0021] Case 2 is formed in a box shape. Case 2 is formed of an insulating material such as resin. Case 2 includes a base 21 and a cover 22. The base 21 supports the contact device 3 and the drive device 4. The base 21 includes a bottom 21a, outer walls 21b - 21e, and an inner wall 21f. The bottom 21a extends in a direction orthogonal to the up - down direction. The outer wall 21b extends upward from the front edge of the bottom 21a. The outer wall 21c extends upward from the rear edge of the bottom 21a. The outer wall 21d extends upward from the left edge of the bottom 21a. The outer wall 21e extends upward from the right edge of the bottom 21a. The inner wall 21f extends upward from the bottom 21a. The inner wall 21f extends in the left - right direction between the outer wall 21d and the outer wall 21e. The inner wall 21f is arranged between the contact device 3 and the drive device 4 in the front - rear direction.

[0022] The cover 22 is open downward and is attached to the outer walls 21b - 21e of the base 21 so as to cover the bottom 21a of the base 21 from above. The contact device 3 and the drive device 4 are housed in the case 2.

[0023] As shown in FIG. 3, the contact device 3 includes a first fixed terminal 11, a second fixed terminal 12, and a movable contact piece 13. In the following description, the first fixed terminal 11 and the second fixed terminal 12 may be referred to as fixed terminals 11, 12.

[0024] The fixed terminals 11 and 12 are formed of a conductive material such as copper. The fixed terminals 11 and 12 are plate-shaped terminals and extend in a direction orthogonal to the front-rear direction. The fixed terminals 11 and 12 are supported by the bottom 21a of the base 21. In the present embodiment, the fixed terminals 11 and 12 are press-fitted and fixed to the bottom 21a of the base 21.

[0025] As shown in FIGS. 3 and 4, the first fixed terminal 11 includes a first fixed contact point 11a and a first external connection portion 11b. The first fixed contact point 11a is disposed on the front surface of the first fixed terminal 11. The first fixed contact point 11a is caulked and fixed to the first fixed terminal 11. Note that the first fixed contact point 11a may be integral with the first fixed terminal 11. The first external connection portion 11b protrudes downward from the bottom 21a of the base 21 and is electrically connected to an external device (not shown).

[0026] The second fixed terminal 12 is disposed at a distance from the first fixed terminal 11 in the left direction. The second fixed terminal 12 has a shape symmetrical to the first fixed terminal 11 in the left-right direction. The second fixed terminal 12 includes a second fixed contact point 12a and a second external connection portion 12b. The second fixed contact point 12a is disposed on the front surface of the second fixed terminal 12. The second fixed contact point 12a is caulked and fixed to the second fixed terminal 12. Note that the second fixed contact point 12a may be integral with the second fixed terminal 12. The second external connection portion 12b protrudes downward from the bottom 21a of the base 21 and is electrically connected to an external device (not shown).

[0027] The movable contact piece 13 is a plate-shaped terminal and is formed of a conductive material such as copper. The movable contact piece 13 is disposed in front of the fixed terminals 11 and 12. The movable contact piece 13 has a substantially T-shaped configuration when viewed from the front-rear direction. The movable contact piece 13 includes a first movable contact point 13a, a second movable contact point 13b, an up-down extending portion 13c, and a left-right extending portion 13d.

[0028] The first movable contact 13a and the second movable contact 13b are caulked and fixed to the movable contact piece 13. The first movable contact 13a and the second movable contact 13b are arranged on the rear surface of the left and right extending portion 13d. The first movable contact 13a faces the first fixed contact 11a in the front-rear direction. The first movable contact 13a can contact the first fixed contact 11a. The second movable contact 13b is arranged to be separated from the first movable contact 13a in the left direction. The second movable contact 13b faces the second fixed contact 12a in the front-rear direction. The second movable contact 13b can contact the second fixed contact 12a. Note that the first movable contact 13a and the second movable contact 13b may be integral with the movable contact piece 13.

[0029] The up and down extending portion 13c extends in the up and down direction, and the upper part is connected to the driving device 4. The left and right extending portion 13d extends in the left and right direction from the lower part of the up and down extending portion 13c.

[0030] The driving device 4 is arranged above the contact device 3. The driving device 4 is arranged above the first space 24a and the second space 24b described later. The driving device 4 moves the movable contact piece 13 in the direction in which the first movable contact 13a approaches the first fixed contact 11a and in the direction in which the first movable contact 13a moves away from the first fixed contact 11a. Further, the driving device 4 moves the movable contact piece 13 in the direction in which the second movable contact 13b approaches the second fixed contact 12a and in the direction in which the second movable contact 13b moves away from the second fixed contact 12a. In the present embodiment, the driving device 4 moves the movable contact piece 13 in the front-rear direction.

[0031] As shown in FIGS. 2 and 4, the driving device 4 includes a spool 41, a coil 42, a yoke 43, a movable iron piece 44, a resin member 45, a return spring 46, and a fixed iron core 47.

[0032] The drive device 4 includes a spool 41, a coil 42, a yoke 43, a movable iron piece 44, a resin member 45, a return spring 46, and a fixed core 47. The spool 41 is cylindrical and extends in the front-rear direction. The coil 42 is wound around the outer circumference of the spool 41. The coil 42 is disposed above the fixed terminals 11, 12. The yoke 43 has an L-shaped bent configuration. The yoke 43 includes a connecting portion 43a and an extending portion 43b. The connecting portion 43a is disposed behind the spool 41 and is connected to the fixed core 47. The extending portion 43b extends forward from the upper end of the connecting portion 43a so as to cover above the coil 42.

[0033] The movable iron piece 44 is disposed in front of the fixed core 47. The movable iron piece 44 is rotatably supported by the yoke 43 at the front end of the extending portion 43b. The resin member 45 insulates the movable iron piece 44 and the movable contact piece 13. The resin member 45 connects the movable iron piece 44 and the movable contact piece 13. Specifically, the movable iron piece 44 and the movable contact piece 13 are insert-molded in the resin member 45. Thereby, the resin member 45 and the movable contact piece 13 rotate integrally with the movable iron piece 44 in accordance with the rotation of the movable iron piece 44.

[0034] The return spring 46 is a coil spring and extends in the front-rear direction. The front end of the return spring 46 is connected to the movable iron piece 44, and the rear end is connected to the yoke 43. The return spring 46 biases the movable contact piece 13 forward via the movable iron piece 44 and the resin member 45. That is, the return spring 46 biases the movable contact piece 13 in a direction in which the first movable contact 13a moves away from the first fixed contact 11a and in a direction in which the second movable contact 13b moves away from the second fixed contact 12a. The fixed core 47 is disposed inside the spool 41 and penetrates the spool 41 in the front-rear direction. The fixed core 47 is disposed above the fixed terminals 11, 12.

[0035] Next, the operation of the electromagnetic relay 1 will be described. When no voltage is applied to the coil 42, as shown in FIG. 3, the first movable contact 13a is separated from the first fixed contact 11a by the elastic force of the return spring 46, and the second movable contact 13b is separated from the second fixed contact 12a. When a voltage is applied to the coil 42 and it is excited, the movable iron piece 44 is attracted to the fixed iron core 47 by the electromagnetic force, so that the movable iron piece 44 rotates against the elastic force of the return spring 46. As a result, the movable contact piece 13 moves rearward, the first movable contact 13a contacts the first fixed contact 11a, and the second movable contact 13b contacts the second fixed contact 12a. When the application of voltage to the coil 42 is stopped, the movable iron piece 44 rotates by the elastic force of the return spring 46. As a result, the movable contact piece 13 moves forward, the first movable contact 13a is separated from the first fixed contact 11a, and the second movable contact 13b is separated from the second fixed contact 12a.

[0036] Here, the case 2 includes a side wall 23, an accommodation space 24, and magnet accommodation portions 25 and 26. In the present embodiment, the side wall 23 is constituted by the bottom portion 21a of the base 21. The side wall 23 covers the accommodation space 24 from below.

[0037] The accommodation space 24 is provided between the base 21 and the cover 22. The accommodation space 24 is provided between the magnet accommodation portion 25 and the magnet accommodation portion 26 in the left-right direction. The accommodation space 24 is provided between the outer wall 21b and the inner wall 21f in the front-rear direction. The first fixed contact 11a, the second fixed contact 12a, and the movable contact piece 13 are accommodated in the accommodation space 24.

[0038] The accommodation space 24 includes a first space 24a and a second space 24b. The first space 24a is a space where the first fixed contact 11a and the first movable contact 13a are arranged. The second space 24b is a space where the second fixed contact 12a and the second movable contact 13b are arranged. The second space 24b communicates with the first space 24a. The boundary B between the first space 24a and the second space 24b is, for example, the center of the movable contact piece 13 in the left-right direction. The upper parts of the first space 24a and the second space 24b communicate with a space 30 where the drive device 4 is arranged. The drive device 4 is arranged above the first space 24a and the second space 24b in the case 2. The movable contact piece 13 is arranged across the first space 24a and the second space 24b.

[0039] The magnet accommodation part 25 is integrally formed with the base 21. The magnet accommodation part 25 is a recess that opens downward and is formed to protrude upward from the side wall 23. The magnet accommodation part 25 is arranged on the right side of the first fixed contact 11a and the first movable contact 13a. The magnet accommodation part 25 includes an arc contact surface 25a. The arc contact surface 25a is arranged between the magnet 50 and the movable contact piece 13, which will be described later, in the left-right direction. The arc contact surface 25a extends in a direction orthogonal to the left-right direction. The arc contact surface 25a is where an arc A1 (an example of a first arc) generated between the first fixed contact 11a and the first movable contact 13a abuts.

[0040] The magnet accommodation part 26 has a shape symmetrical to the magnet accommodation part 25 with respect to the left-right direction and is arranged on the left side of the second fixed contact 12a and the second movable contact 13b.

[0041] The electromagnetic relay 1 includes magnets 50, 51, a gas flow path 60, and a partitioning member 70. The magnet 50 is an example of a first magnet. The magnet 51 is an example of a second magnet. The magnets 50, 51 are, for example, rectangular permanent magnets. The magnet 50 is arranged on the right side of the first fixed contact 11a and the first movable contact 13a. The magnet 50 is accommodated in the magnet accommodation part 25. The magnet 50 is inserted into the magnet accommodation part 25 from below and is prevented from coming out of the magnet accommodation part 25 by a support member 54 that supports the magnet 50 from below.

[0042] The magnet 50 is arranged such that magnetic flux flows in the right direction in the vicinity of the first fixed contact 11a. As shown in FIG. 4, the magnet 50 extends the arc A1 downward. Specifically, for example, when current flows from the first movable contact 13a toward the first fixed contact 11a, a downward Lorentz force acts on the arc A1, causing the arc A1 to extend downward. Note that as shown in FIG. 4, as the arc A1 extends downward, it extends in a direction approaching the arc contact surface 25a.

[0043] The magnet 51 is arranged on the left side of the second fixed contact 12a and the second movable contact 13b. The magnet 51 is housed in the magnet housing portion 26. The magnet 51 is inserted into the magnet housing portion 26 from below and is prevented from coming out of the magnet housing portion 26 by a support member 55 that supports the magnet 51 from below.

[0044] The magnet 51 is arranged such that magnetic flux flows in the right direction in the vicinity of the second fixed contact 12a. The magnet 51 is arranged such that opposite poles face the magnet 50. The magnet 51 extends the arc A2 (an example of a second arc) generated between the second fixed contact 12a and the second movable contact 13b upward. Specifically, for example, when current flows from the second fixed contact 12a toward the second movable contact 13b, an upward Lorentz force acts on the arc A2, causing the arc A2 to extend upward. Note that as shown in FIG. 4, as the arc A2 extends upward, it extends in a direction approaching the magnet 51.

[0045] The gas flow path 60 is disposed within the accommodation space 24. The gas flow path 60 is a flow path for allowing the high-temperature gas generated by the first arc to escape from the first space 24a to the second space 24b. The gas flow path 60 is disposed below the first space 24a and the second space 24b. The gas flow path 60 is disposed between the side wall 23 and the movable contact piece 13 in the vertical direction. The gas flow path 60 is disposed between the magnet accommodation portion 25 and the magnet accommodation portion 26 in the horizontal direction. The gas flow path 60 extends in the horizontal direction. The gas flow path 60 is constituted by the side wall 23, the partition member 70, the outer wall 21b, and the inner wall 21f.

[0046] The gas flow path 60 includes an inlet 61 and an outlet 62. The inlet 61 communicates with the first space 24a. The inlet 61 faces the arc contact surface 25a. The inlet 61 includes a tapered portion 61a that expands toward the arc contact surface 25a. In the horizontal direction, the inlet 61 is closer to the arc contact surface 25a than the centers of the first fixed contact 11a and the first movable contact 13a.

[0047] The outlet 62 communicates with the second space 24b. The outlet 62 faces the magnet accommodation portion 26. The outlet 62 includes a tapered portion 62a that expands toward the magnet accommodation portion 26. In the horizontal direction, the outlet 62 is closer to the magnet accommodation portion 26 than the centers of the second fixed contact 12a and the second movable contact 13b.

[0048] The partition member 70 is separate from the base 21. The partition member 70 is formed of, for example, a material having better arc extinction performance than the base 21. Note that the partition member 70 may be formed of the same material as the base 21. The partition member 70 is fixed to the base 21.

[0049] The partition member 70 is disposed in the accommodation space 24. The partition member 70 is disposed between the movable contact piece 13 and the gas flow path 60. The partition member 70 partitions the first space 24a and the second space 24b from the gas flow path 60. The partition member 70 extends in the left-right direction and the front-rear direction. The side surfaces of the partition member 70 in the front-rear direction are in contact with the outer wall 21b and the inner wall 21f. The side surfaces of the partition member 70 in the left-right direction are separated from the magnet accommodation portions 25, 26. The lower surface of the partition member 70 is separated from the side wall 23.

[0050] The partition member 70 includes a concave portion 70a, convex portions 70b, 70c, and tapered surfaces 70d, 70e. The concave portion 70a is formed on the lower surface of the partition member 70. The concave portion 70a is formed at the center of the partition member 70 in the left-right direction. The concave portion 70a opens downward.

[0051] The partition member 70 is supported by support portions 21g, 21h formed on the base 21. Specifically, the concave portion 70a of the partition member 70 is supported by the support portions 21g, 21h. The support portion 21g has a shape protruding from the outer wall 21b toward the accommodation space 24. The support portion 21g is connected to the side wall 23. The support portion 21h has a shape protruding from the inner wall 21f toward the accommodation space 24. The support portion 21h is connected to the side wall 23. The support portion 21g is separated from the support portion 21g in the front-rear direction.

[0052] The convex portions 70b, 70c are formed on the upper surface of the partition member 70. The convex portions 70b, 70c protrude upward toward the movable contact piece 13. The convex portions 70b, 70c are arranged farther from the arc contact surface 25a than the tapered surface 70d in the left-right direction. The convex portion 70b is disposed in the first space 24a. The convex portion 70b is disposed to the left of the first fixed contact 11a and the first movable contact 13a in the first space 24a. The convex portion 70c is disposed in the second space 24b. The convex portion 70c is disposed to the right of the second fixed contact 12a and the second movable contact 13b in the second space 24b.

[0053] The tapered surfaces 70d and 70e are formed on the upper surface of the partitioning member 70. The tapered surface 70d is disposed below the first fixed contact 11a and the first movable contact 13a. The tapered surface 70d is inclined in a direction approaching the side wall 23 toward the arc contact surface 25a. The tapered surface 70e is disposed below the second fixed contact 12a and the second movable contact 13b. The tapered surface 70e is inclined in a direction approaching the side wall 23 toward the magnet housing portion 26.

[0054] In the electromagnetic relay 1 described above, the high-temperature gas due to the arc A1 can be discharged from the first space 24a to the second space 24b by the gas flow path 60 disposed between the side wall 23 of the case 2 and the movable contact piece 13. Therefore, it is possible to suppress the retention of the high-temperature gas due to the arc A1 in the first space 24a. Specifically, as indicated by the two-dot chain line in FIG. 4, the high-temperature gas due to the arc A1 flows from the first space 24a to the second space 24b through the gas flow path 60. Further, since the outlet 62 of the gas flow path 60 communicates with the second space 24b, the outlet 62 is disposed at a position away from the first fixed contact 11a. For this reason, the high-temperature gas flowing from the first space 24a to the second space 24b through the gas flow path 60 is less likely to return to the first space 24a. Thereby, restriking of the arc A1 can be suppressed.

[0055] As described above, an embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.

[0056] The configurations of the contact device 3 and the drive device 4 may be changed. The drive device 4 may have a plunger type structure. The configuration of the case 2 may be changed. The arrangements and shapes of the magnets 50 and 51 may be changed.

[0057] The shape of the partitioning member 70 may be changed. The partitioning member 70 may have any shape that partitions the first space 24a and the second space 24b from the gas flow path 60. For example, at least one of the convex portions 70b and 70c may be omitted, or a convex portion may be formed at the boundary B between the first space 24a and the second space 24b.

[0058] FIG. 6 is a cross-sectional perspective view around the partition member 70 according to a modified example. The electromagnetic relay 1 may further include a flow path member 80. The flow path member 80 is separate from the case 2. The flow path member 80 is disposed between the side wall 23 and the partition member 70. Here, the gas flow path 60 is constituted by the flow path member 80, the partition member 70, the outer wall 21b, and the inner wall 21f. The flow path member 80 is fixed to the side wall 23. The flow path member 80 may be formed of a material having better arc extinguishing performance than the base 21, for example. The partition member 70 and the flow path member 80 may be integrated.

Description of Reference Numerals

[0059] 1 Electromagnetic relay 2 Case 4 Driving device 11 First fixed terminal 11a First fixed contact 12 Second fixed terminal 12a Second fixed contact 13 Movable contact piece 13a First movable contact 13b Second movable contact 23 Side wall 24 Accommodation space 24a First space 24b Second space 25a Arc contact surface 50 Magnet (an example of the first magnet) 51 Magnet (an example of the second magnet) 60 Gas flow path 61a Taper portion 70 Partition member 70d Taper surface

Claims

1. A case including a receiving space containing a first space and a second space, and a side wall covering the receiving space from a first direction; A first fixed terminal including a first fixed contact disposed in the first space and a first external connection portion protruding from the side wall in the first direction; A second fixed terminal including a second fixed contact disposed in the second space and a second external connection portion protruding from the side wall in the first direction, and being disposed away from the first fixed terminal; A movable contact piece disposed across the first space and the second space, including a first movable contact facing the first fixed contact and a second movable contact facing the second fixed contact; A first magnet that extends a first arc generated between the first fixed contact and the first movable contact in the first direction; A gas flow path including an inlet communicating with the first space and an outlet communicating with the second space, and disposed between the side wall and the movable contact piece; A partition member disposed between the movable contact piece and the gas flow path, partitioning the first space and the second space from the gas flow path; and comprising; The outlet is disposed closer to the second movable contact side than the center between the first movable contact and the second movable contact. An electromagnetic relay.

2. Further comprising a second magnet that extends a second arc generated between the second fixed contact and the second movable contact in a second direction opposite to the first direction. The electromagnetic relay according to claim 1.

3. Further comprising a driving device disposed in the case in a second direction relative to the first space and the second space, and moving the movable contact piece in a moving direction including a direction in which the first movable contact approaches the first fixed contact and a direction in which the first movable contact moves away from the first fixed contact. The electromagnetic relay according to claim 2.

4. A case including a receiving space containing a first space and a second space, and a side wall covering the receiving space from a first direction; A first fixed terminal including a first fixed contact disposed in the first space and a first external connection portion protruding from the side wall in the first direction; A second fixed terminal including a second fixed contact disposed in the second space and a second external connection portion protruding from the side wall in the first direction, the second fixed terminal being disposed away from the first fixed terminal; A movable contact piece disposed across the first space and the second space, including a first movable contact facing the first fixed contact and a second movable contact facing the second fixed contact; A first magnet that extends a first arc generated between the first fixed contact and the first movable contact in the first direction; A gas flow path including an inlet communicating with the first space and an outlet communicating with the second space, the gas flow path being disposed between the side wall and the movable contact piece; A partition member disposed between the movable contact piece and the gas flow path, partitioning the first space and the second space from the gas flow path; A second magnet that extends a second arc generated between the second fixed contact and the second movable contact in a second direction opposite to the first direction; A driving device disposed in the case in a second direction relative to the first space and the second space, the driving device moving the movable contact piece in a moving direction including a direction in which the first movable contact approaches the first fixed contact and a direction in which the first movable contact moves away from the first fixed contact; and comprising The second space communicates with a space in which the driving device is disposed. An electromagnetic relay.

5. A case including a housing space including a first space and a second space, and a side wall covering the housing space from a first direction; A first fixed terminal including a first fixed contact disposed in the first space and a first external connection portion protruding from the side wall in the first direction; A second fixed terminal including a second fixed contact disposed in the second space and a second external connection portion protruding from the side wall in the first direction, the second fixed terminal being disposed away from the first fixed terminal; A movable contact piece including a first movable contact facing the first fixed contact and a second movable contact facing the second fixed contact, and disposed across the first space and the second space. A first magnet that extends the first arc generated between the first fixed contact and the first movable contact in the first direction. A gas flow path including an inlet communicating with the first space and an outlet communicating with the second space, and disposed between the side wall and the movable contact piece. A partition member disposed between the movable contact piece and the gas flow path, partitioning the first space and the second space from the gas flow path. Comprising. The first magnet is arranged such that as the first arc extends in the first direction, the first arc extends in a direction approaching the first magnet. The case is disposed between the first magnet and the movable contact piece, and includes an arc contact surface against which the first arc abuts. The inlet of the gas flow path faces the arc contact surface. Electromagnetic relay.

6. The inlet of the gas flow path includes a tapered portion that expands toward the arc contact surface. The electromagnetic relay according to claim 5.

7. The partition member includes a tapered surface that inclines in a direction approaching the side wall toward the arc contact surface. The electromagnetic relay according to claim 5 or 6.

8. The partition member is disposed farther from the arc contact surface than the tapered surface, and further includes a convex portion that protrudes in a second direction opposite to the first direction toward the movable contact piece. The electromagnetic relay according to claim 7.

9. The partition member is separate from the side wall of the case. The electromagnetic relay according to any one of claims 1 to 8.

10. A case including an accommodation space containing a first space and a second space, and a side wall covering the accommodation space from a first direction; A first fixed terminal including a first fixed contact disposed in the first space and a first external connection portion protruding from the side wall in the first direction; A second fixed terminal including a second fixed contact disposed in the second space and a second external connection portion protruding from the side wall in the first direction, the second fixed terminal being disposed away from the first fixed terminal; A movable contact piece disposed across the first space and the second space, including a first movable contact facing the first fixed contact and a second movable contact facing the second fixed contact; A first magnet that extends a first arc generated between the first fixed contact and the first movable contact in the first direction; A gas flow path disposed between the side wall and the movable contact piece, including an inlet communicating with the first space and an outlet communicating with the second space; A partition member disposed between the movable contact piece and the gas flow path, partitioning the first space and the second space from the gas flow path; provided with; Further comprising a flow path member that is separate from the side wall of the case, is disposed between the side wall and the partition member, and constitutes the gas flow path. An electromagnetic relay.

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