JP6907801B2 - Electromagnetic relay - Google Patents

Description

The present invention relates to an electromagnetic relay.

Patent Document 1 has a pair of fixed terminals each having a fixed contact portion and a pair of movable contact portions arranged so as to be in contact with and disengage from each fixed contact portion, and each movable contact portion corresponds to the pair of movable contact portions. An electromagnetic relay is disclosed that includes a movable plate that can move in a contacting / separating direction that contacts or opens a fixed contact portion. The electromagnetic relay is provided with a first arc extinguishing permanent magnet and a second arc extinguishing permanent magnet on both sides of the movable plate in the lateral direction when viewed from the contacting / detaching direction. A third arc extinguishing permanent magnet and a fourth arc extinguishing permanent magnet are provided on both sides of the movable plate in the longitudinal direction of the movable plate, respectively.

Japanese Unexamined Patent Publication No. 2016-45504

In the electromagnetic relay, the first arc extinguishing permanent magnet and the second arc extinguishing permanent magnet are arranged so that the magnetic poles of the opposite end faces are N poles, and the third arc extinguishing permanent magnet and the fourth are arranged. Permanent magnets for arc extinguishing are arranged so that the magnetic poles of the opposing end faces are S poles. That is, in the electromagnetic relay, magnetic flux flows from each of the first arc extinguishing permanent magnet and the second arc extinguishing permanent magnet toward the third arc arc extinguishing permanent magnet and the fourth arc arc extinguishing permanent magnet. Therefore, the arc generated between each movable contact portion and the corresponding fixed contact portion can be extended to the space around the movable plate to improve the arc blocking performance, while the fixed contact portion corresponding to each movable contact portion can be used. It may not be possible to increase the contact pressure between the movable contacts and the corresponding fixed contacts to improve contact reliability. For example, if the contact pressure between each movable contact and the corresponding fixed contact is insufficient, each movable contact may separate from the corresponding fixed contact, causing smoke or ignition. It is necessary to increase the size of the electromagnetic relay.

Therefore, the present invention is to improve the contact reliability between each movable contact portion and the corresponding fixed contact portion while improving the blocking performance of the arc generated between each movable contact portion and the corresponding fixed contact portion. The subject is to provide an electromagnetic relay that can be used.

The electromagnetic relay according to one aspect of the present invention is
A first fixed terminal and a second fixed terminal which are electrically independent of each other and have a first fixed contact portion and a second fixed contact portion, respectively.
Each of the first movable contact portion and the second movable contact portion has the first movable contact portion and the second movable contact portion facing the first fixed contact portion and the second fixed contact portion, respectively. 1 Movable contacts arranged so as to be movable in the contact / separation direction to contact or open the fixed contact portion and the second fixed contact portion.
When viewed from the contact / separation direction, the first magnet portion of the movable contactor is arranged on one side in a direction intersecting the arrangement direction of the first movable contact portion and the second movable contact portion.
The second magnet portion and the third magnet portion which are arranged on both sides of the movable contactor in the arrangement direction when viewed from the contact / separation direction and whose ends on the movable contact side have the same polarity with each other. With and
The end portion of the first magnet portion on the movable contact side has a polarity different from the polarity of the end portion of the second magnet portion and the third magnet portion on the movable contact side.

According to the electromagnetic relay of the above aspect, the polarities of the ends of the first magnet portion on the movable contact side are different from the polarities of the ends of the second magnet portion and the third magnet portion on the movable contact side. have. Therefore, for example, when the end of the first magnet portion on the movable contact side is the north pole and the end of the second magnet portion and the third magnet portion on the movable contact side is the south pole, the first magnet portion The magnetic flux flows from the first magnet portion toward the second magnet portion and the third magnet portion, and the magnetic flux flows from the first magnet portion in the direction intersecting the arrangement direction. As a result, the magnetic flux flowing between the first magnet portion, the second magnet portion, and the third magnet portion causes the arc generated between each movable contact portion and the corresponding fixed contact portion to be generated in the space around the movable contact. On the other hand, due to the Lorentz force generated by the magnetic flux flowing from the first magnet portion in the direction intersecting the arrangement direction intersecting with the current flowing through the movable contactor, each movable contact portion and the corresponding fixed contact portion are connected to each other. The contact pressure between them can be increased. That is, it is possible to improve the contact reliability between each movable contact portion and the corresponding fixed contact portion while improving the breaking performance of the arc generated between each movable contact portion and the corresponding fixed contact portion.

The perspective view of the electromagnetic relay of one Embodiment of this invention. Sectional view taken along line II-II of FIG. The plan view of the electromagnetic relay of FIG. 1 with the cover and the ceramic plate removed. The plan view for demonstrating the arrangement of the magnet part of the electromagnetic relay of FIG. The front schematic view for demonstrating the arrangement of the magnet part of the electromagnetic relay of FIG. FIG. 5 is a schematic plan view for explaining a first modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic side view for explaining a first modification of the electromagnetic relay of FIG. 1. The front schematic view for demonstrating the 2nd modification of the electromagnetic relay of FIG. FIG. 5 is a schematic side view for explaining a second modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining a third modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining a fourth modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining a fifth modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining a sixth modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining a seventh modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining an eighth modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic side view for explaining an eighth modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining a ninth modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic side view for explaining a ninth modification of the electromagnetic relay of FIG. 1. FIG. 5 is a schematic plan view for explaining a tenth modification of the electromagnetic relay of FIG. FIG. 5 is a schematic plan view for explaining an eleventh modification of the electromagnetic relay of FIG. The front schematic view for demonstrating the twelfth modification of the electromagnetic relay of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, terms including terms indicating a specific direction or position as necessary (for example, "top", "bottom", "right", "left", "edge", "side")) However, the use of these terms is for facilitating the understanding of the invention with reference to the drawings, and the meaning of these terms does not limit the technical scope of the present invention. In addition, the following description is merely an example and is not intended to limit the present invention, its application, or its use. Furthermore, the drawings are schematic, and the ratio of each dimension does not always match the actual one.

As shown in FIGS. 1 to 3, the electromagnetic relay 1 according to the embodiment of the present invention includes a first fixed terminal 31 and a second fixed terminal 32 electrically arranged independently of each other, and each fixed terminal 31. The first to third movable contacts 40 arranged so as to be movable in the direction of approaching or separating from the 32 and the movable contacts 40 arranged around the movable contacts 40 in the direction intersecting the moving directions of the movable contacts 40. It includes magnet portions 51, 52, and 53 (only the first magnet portion 51 is shown in FIG. 3).

In this embodiment, the electromagnetic relay 1 includes, for example, an insulating housing 10 and a contact case 20 (shown in FIG. 2) provided inside the housing 10, with a first fixed terminal 31 and a second. The fixed terminals 32 are fixed to the contact case 20, the movable contacts are arranged inside the contact case 20, and the first to third magnet portions 51, 52, and 53 are arranged inside the housing 10. ..

Each of the first fixed terminal 31 and the second fixed terminal 32 has a first fixed contact portion 33 and a second fixed contact portion 34 inside the contact case 20, respectively. Further, the movable contact 40 has a first movable contact portion 41 and a second movable contact portion 42 facing the first fixed contact portion 33 and the second fixed contact portion 34, respectively.

In the cross-sectional view shown in FIG. 2, the electromagnetic relay 1 passes through the centers of the first fixed terminal 31 and the second fixed terminal 32, except for the housing 10, and is symmetrical with respect to the center line CL1 of the movable contact 40. It is provided in.

As shown in FIG. 1, the housing 10 is composed of a case 11 and a cover 12. Each of the case 11 and the cover 12 has, for example, a substantially rectangular parallelepiped shape and a hollow box shape, and is provided with an opening surface on one surface as shown in FIG. The cover 12 is attached to the case 11 with the opening surface of the cover 12 facing the opening surface of the case 11. Further, the bottom wall portion 121 of the cover 12 facing the opening surface of the cover 12 is provided with two circular terminal holes 13 arranged at intervals in the longitudinal direction (that is, the left-right direction in FIG. 2). ing. A first fixed terminal 31 and a second fixed terminal 32 are arranged in each terminal hole 13, respectively.

The contact case 20 has a substantially rectangular parallelepiped shape, and as shown in FIG. 2, is composed of a ceramic plate 21, a flange portion 22, and a first yoke 23, and an accommodating portion 24 is formed therein.

The ceramic plate 21 is arranged inside the housing 10 so as to be adjacent to the bottom wall portion 121 of the cover 12, and extends along the bottom wall portion 121. The first fixed terminal 31 and the second fixed terminal 32 are fixed to the ceramic plate 21. The flange portion 22 is inside the cover 12 from the end of the cover 12 of the ceramic plate 21 on the opening surface side (that is, the lower side of FIG. 2) toward the bottom wall portion 111 of the case 11 facing the opening surface of the case 11. Extends from to the inside of the case 11. Further, the first yoke 23 is arranged substantially parallel to the ceramic plate 21 inside the case 11, and the end portion of the flange portion 22 on the case 11 side is connected to the outer peripheral edge portion thereof. A through hole 231 that communicates with the accommodating portion 24 and the outside of the contact case 20 along the center line CL1 is provided at a substantially central portion of the first yoke 23.

Further, inside the accommodating portion 24, an insulating magnet holder 25 for holding the first to third magnet portions 51, 52, 53 is provided. The magnet holder 25 penetrates the first yoke 23 along the flange portion 22 and the first yoke 23 from a portion of the ceramic plate 21 that is farther from the center line CL1 than the first fixed terminal 31 and the second fixed terminal 32. It extends to the outside of the contact case 20 through the hole 231. A through hole 251 that communicates with the accommodating portion 24 and the outside of the contact case 20 along the center line CL1 is provided at a substantially central portion of the magnet holder 25. In the through hole 251 a substantially cylindrical rod-shaped movable shaft 35 is movably arranged along the center line CL1.

The movable shaft 35 extends from the accommodating portion 24 to the outside of the contact case 20, and the movable contact 40 is connected to the end portion on the accommodating portion 24 side, and the electromagnetic wave described later is attached to the end portion on the outer side of the contact case 20. A movable iron piece 65 of the drive unit 60 is connected. Further, in the intermediate portion of the accommodating portion 24 of the movable shaft 35, a flange portion 351 extending from the movable shaft 35 in a direction orthogonal to the center line CL1 is provided. The flange portion 351 is arranged so as to be in contact with the area around the through hole 251 of the magnet holder 25 when the movable contact portions 41 and 42 move in the direction of opening and separating from the corresponding fixed contact portions 33 and 34. Therefore, the movable range of the movable shaft 35 and thus the movable contactor 40 is regulated. Further, around the movable shaft 35 in the accommodating portion 24, a coil spring 36 that expands and contracts along the movable shaft 35 is provided. The coil spring 36 is arranged between the coil spring holding portion 352 locked to the flange portion 351 of the movable shaft 35 and the movable contactor 40.

As shown in FIGS. 1 and 2, each of the first fixed terminal 31 and the second fixed terminal 32 has, for example, a substantially cylindrical shape, and is electrically fixed to the ceramic plate 21 independently of each other. Each of the first fixed terminal 31 and the second fixed terminal 32 is arranged so as to be spaced apart from each other along the arrangement direction thereof (that is, the left-right direction in FIG. 2), and a part thereof is located in the accommodating portion 24. There is.

As shown in FIG. 2, a first fixed contact portion 33 and a second fixed contact portion 34 are provided on the end faces of the first fixed terminal 31 and the second fixed terminal 32 on the accommodating portion 24 side, respectively. The fixed contact portions 33 and 34 may be formed integrally with the corresponding fixed terminals 31 and 32, or may be formed separately from the corresponding fixed terminals 31 and 32.

As shown in FIG. 3, the movable contactor 40 has, for example, a substantially rectangular plate shape. As shown in FIG. 2, the movable contact 40 has a first movable contact portion 41 and a second movable contact portion 42 facing the first fixed contact portion 33 and the second fixed contact portion 34, respectively. A movable shaft 35 that can move along the center line CL1 is connected to a substantially central portion of the movable contactor 40. That is, each of the first movable contact portion 41 and the second movable contact portion 42 contacts or separates from the first fixed contact portion 33 and the second fixed contact portion 34 along the center line CL1, and the movable contact 40 Is arranged so that each of the first movable contact portion 41 and the second movable contact portion 42 can move in the contact / separation direction in which the first fixed contact portion 33 and the second fixed contact portion 34 come into contact with or open from each other. .. Further, the first movable contact portion 41 and the second movable contact portion 42 are electrically connected to each other by a movable contact 40. The movable contact portions 41 and 42 may be formed integrally with the movable contact 40, or may be formed separately from the movable contact 40.

As shown in FIG. 3, each of the first to third magnet portions 51, 52, and 53 is composed of a substantially rectangular parallelepiped permanent magnet. In FIG. 3, the cover 12 and the ceramic plate 21 are omitted.

The first magnet portion 51 is in movable contact when viewed from the contact / separation direction (that is, the paper surface penetration direction in FIG. 3) in which the movable contact portions 41, 42 are in contact with or open from the corresponding fixed contact portions 33, 34. The first movable contact portion 41 and the second movable contact portion 42 of the child 40 are arranged on one side in a direction intersecting (for example, orthogonal) with each other in the arrangement direction (that is, the left-right direction in FIG. 3) and held by the magnet holder 25. Has been done. Specifically, the first magnet portion 51 has a first flat surface 511 at the end on the movable contact 40 side, and the first flat surface 511 is the first movable contact portion 41 and the first movable contact portion 41 when viewed from the contact / separation direction. The second movable contact portion 42 is arranged parallel to the center line CL2 of the movable contact 40, which is a virtual straight line extending in the arrangement direction (that is, the longitudinal direction of the movable contact 40).

Each of the second magnet portion 52 and the third magnet portion 53 is arranged on both sides of the movable contactor 40 in the arrangement direction when viewed from the contact / separation direction, and is held by the magnet holder 25. Specifically, each of the second magnet portion 52 and the third magnet portion 53 has a second flat surface 521 and a third flat surface 531 at the ends on the movable contact 40 side, and these second flat surfaces 521 and the third flat surface 531 are provided. The third flat surface 531 is arranged so as to be orthogonal to the center line CL2 of the movable contacts 40 extending in the arrangement direction of the first movable contact portion 41 and the second movable contact portion 42 when viewed from the contact / separation direction. There is.

The ends of the second magnet portion 52 and the third magnet portion 53 on the movable contact 40 side (in this embodiment, the second flat surface 521 and the third flat surface 531) have the same polarity as each other. The end of the first magnet portion 51 on the movable contact 40 side (in this embodiment, the first flat surface 511) is the end of the second magnet portion 52 and the third magnet portion 53 on the movable contact 40 side. Have polarities that are different (ie, opposite) from each other. For example, the polarity of the end of the first magnet portion 51 on the movable contact 40 side is N pole, and the ends of the second magnet portion 52 and the third magnet portion 53 on the movable contact 40 side are 521 and 531. The polarity of is the S pole.

Further, the first magnet portion 51 is arranged between the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40. Specifically, the first magnet portion 51 is arranged symmetrically with respect to the center line CL3 of the movable contacts 40 extending in the direction orthogonal to the arrangement direction of the movable contacts 40 when viewed from the contact / separation direction. Each of the second magnet portion 52 and the third magnet portion 53 is the center line CL2 of the movable contact 40 extending in the arrangement direction and the center line of the movable contact 40 extending in the direction intersecting the arrangement direction when viewed from the contact / separation direction. It is arranged symmetrically with respect to CL3.

As shown in FIG. 2, the electromagnetic drive unit 60 includes an electromagnet unit 61 having a through hole 611 extending along the center line CL1 and having a movable shaft 35 arranged in a substantially central portion, and an electromagnet unit 61 together with a first yoke 23. The first yoke 23 and the second yoke 64 are arranged around the movable shaft 35, the movable iron piece 65 arranged in the through hole 611 of the electromagnet portion 61 and connected to the movable shaft 35, and the through hole 611 of the electromagnet portion 61. It is composed of a fixed iron piece 66 connected to the first yoke 23. The electromagnetic drive unit 60 drives the movable shaft 35 in response to the excitation / non-excitation of the electromagnetic drive unit 61.

The electromagnet portion 61 is composed of an insulating spool 62 provided with a through hole 611, a coil 63 wound around the spool 62, and a coil terminal (not shown) fixed to the spool 62. There is. The second yoke 64 has, for example, a substantially U-shape in the cross-sectional view shown in FIG. The fixed iron piece 66 is located between the first yoke 23 and the magnet holder 25 in a direction in which one end thereof intersects the center line CL1. A through hole 661 extending along the center line CL1 is provided at a substantially central portion of the fixed iron piece 66. In the through hole 661, the movable shaft 35 is movably arranged along the center line CL1 with a gap. Further, in the through hole 611 of the electromagnet portion 61, a return spring 67 is provided between the fixed iron piece 66 and the movable iron piece 65.

In the electromagnetic relay 1 in the return state shown in FIG. 2 (that is, the state in which the fixed contact portions 33 and 34 corresponding to the movable contact portions 41 and 42 are separated from each other), when a current is supplied to the coil 63 of the electromagnet portion 61, it is movable. A magnetic attraction is generated between the movable iron piece 65 connected to the shaft 35 and the fixed iron piece 66. By this magnetic attraction, the movable iron piece 65 is magnetically attracted to the fixed iron piece 66 against the elastic force of the return spring 67, and the movable shaft 35 is accommodated from the outside of the contact case 20 along the contact / separation direction. Move towards 24. As a result, the movable contact 40 moves in the direction of approaching the first fixed terminal 31 and the second fixed terminal 32 along the contact / separation direction, and the movable contact portions 41, 42 move to the corresponding fixed contact portions 33, 34. Upon contact, the electromagnetic relay 1 goes from the reset state to the operating state.

Further, when the supply of the current to the coil 63 of the electromagnet unit 61 is stopped in the electromagnetic relay 1 in the operating state, the magnetic attraction force that has attracted the movable iron piece 65 disappears, and the electromagnetic relay 1 is movable due to the elastic force of the return spring 67. The shaft 35 moves from the accommodating portion 24 toward the outside of the contact case 20 along the contact / separation direction. As a result, the movable contact 40 moves in the direction away from the first fixed terminal 31 and the second fixed terminal 32 along the contacting / separating direction, and the movable contact portions 41, 42 are opened from the corresponding fixed contact portions 33, 34. When separated, the electromagnetic relay 1 returns from the operating state to the returning state.

That is, due to the movement of the movable shaft 35 along the contact / separation direction, the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40 move with respect to the first fixed contact portion 33 and the second fixed contact portion 34. Contact or disengage.

In the electromagnetic relay 1, the end of the first magnet portion 51 on the movable contact 40 side has the polarity (that is, S) of the end of each of the second magnet portion 52 and the third magnet portion 53 on the movable contact 40 side. Polars) have different polarities (ie, north poles) from each other. Therefore, as shown in FIG. 4, magnetic flux flows from the first magnet portion 51 along the A direction orthogonal to the arrangement direction of the first movable contact portion 41 and the second movable contact portion 42. Further, magnetic flux flows from the first magnet portion 51 through the first movable contact portion 41 toward the second magnet portion 52 in the B1 direction, and from the first magnet portion 51 through the second movable contact portion 42. Magnetic flux flows along the B2 direction toward the third magnet portion 53.

At this time, as shown in FIG. 5, it is assumed that a current flows from the first fixed terminal 31 through the movable contact 40 toward the second fixed terminal 32 in the C direction. In this case, the Lorentz force in the F1 direction of FIG. 4 acts on the arc generated between the first fixed contact portion 33 and the first movable contact portion 41 due to the magnetic flux in the B1 direction, and the magnetic flux in the B2 direction causes the arc. The Lorentz force in the F2 direction of FIG. 4 acts on the arc generated between the second fixed contact portion 34 and the second movable contact portion 42. Further, due to the magnetic flux in the A direction, a Lorentz force acts on the movable contact 40 in the F3 direction of FIG. As a result, the arc generated between the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34 is generated from the space around the movable contact 40 (in this case, as shown in FIG. 3, from the contact / separation direction). As seen, it is possible to extend the arc to the space 100) opposite to the first magnet portion 51 with respect to the intersection P of the two center lines CL2 and CL3 of the movable contact 40), while each movable contact portion 41, The contact pressure between the 42 and the corresponding fixed contact portions 33 and 34 can be increased. That is, while improving the blocking performance of the arc generated between the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34, the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34 The contact reliability between them can be improved.

Further, the first magnet portion 51 is arranged between the first movable contact portion 41 and the second movable contact portion 42. As a result, the magnetic flux in the A direction intersecting the arrangement direction flows between the first movable contact portion 41 and the second movable contact portion 42, so that the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34 The arc generated between the two can be reliably stretched by the space around the movable contact 40, and the contact pressure between each movable contact portion 41, 42 and the corresponding fixed contact portions 33, 34 can be increased more reliably. can. That is, while improving the breaking performance of the arc generated between the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34 more reliably, the fixed contact portions 33 corresponding to the movable contact portions 41, 42, The contact reliability with 34 can be improved more reliably.

Further, each of the second magnet portion 52 and the third magnet portion 53 is arranged symmetrically with respect to the center line CL3 of the movable contactor 40 extending in the direction orthogonal to the arrangement direction when viewed from the contact / separation direction. Further, the first magnet portion 51 has a first flat surface 511 at the end on the movable contact 40 side, and the second magnet portion 52 has a second flat surface 521 at the end on the movable contact 40 side. The third magnet portion 53 has a third flat surface 531 at the end on the movable contact 40 side. The first flat surface 511 is arranged parallel to the center line CL2 of the movable contact 40, which is a virtual straight line extending in the arrangement direction when viewed from the contact / separation direction, and the second flat surface 521 and the third flat surface 531 are arranged. , Are arranged so as to be orthogonal to the center line CL2 of the movable contact 40 when viewed from the contact / separation direction. As a result, the arc generated between the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34 is surely extended by the space around the movable contact 40, and corresponds to the movable contact portions 41, 42. It is possible to more reliably increase the contact pressure between the fixed contact portions 33 and 34. That is, while improving the breaking performance of the arc generated between the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34 more reliably, the fixed contact portions 33 corresponding to the movable contact portions 41, 42, The contact reliability with 34 can be improved more reliably.

In the electromagnetic relay 1, the first magnet portion 51 is arranged between the first movable contact portion 41 and the second movable contact portion 42, but is not limited to this. Further, the second magnet portion 52 and the third magnet portion 53 are the center line CL2 of the movable contact 40 extending in the arrangement direction and the center line of the movable contact 40 extending in the direction intersecting the arrangement direction when viewed from the contact / separation direction. It is arranged symmetrically with respect to CL3, but is not limited to this. Further, the first flat surface 511 of the first magnet portion 51 is arranged parallel to the center line CL2 of the movable contact 40 when viewed from the contact / separation direction, and the second flat surface 521 and the third flat surface 531 are arranged. , The movable contactor 40 is arranged so as to be orthogonal to the center line CL2 when viewed from the contact / separation direction, but the present invention is not limited to this. The first magnet portion 51 is arranged on one side in the direction intersecting the arrangement direction when viewed from the contact / separation direction, and the second magnet portion 52 and the third magnet portion 53 are arranged in the arrangement direction when viewed from the contact / separation direction. It suffices if they are arranged on both sides of the movable contact 40, and can be arranged at an arbitrary position according to the design of the electromagnetic relay 1.

As shown in FIG. 6, in the electromagnetic relay 1, the arrangement of the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40 when viewed from the contact / separation direction (that is, the paper surface penetration direction in FIG. 6). A fourth magnet portion 54 may be further provided on the other side of the direction intersecting the direction (ie, the upper side of FIG. 6 with respect to the movable contact 40).

The fourth magnet portion 54 is composed of a permanent magnet as an example, and the end portion on the movable contact 40 side thereof has a polarity different from the polarity of the end portion on the movable contact 40 side of the first magnet portion 51. is doing. That is, when the polarity of the end of the first magnet portion 51 on the movable contact 40 side is N pole, the polarity of the end of each of the second to fourth magnet portions 52, 53, 54 on the movable contact 40 side. Is the S pole, and when the polarity of the end of the first magnet portion 51 on the movable contact 40 side is the S pole, on the movable contact 40 side of each of the second to fourth magnet portions 52, 53, 54. The polarity of the end is N pole.

The fourth magnet portion 54 may be arranged symmetrically with respect to the center line CL2 extending in the arrangement direction of the movable contacts 40 with respect to the first magnet portion 51. Further, a fourth flat surface 541 parallel to the center line CL2 of the movable contact 40 may be provided at the end of the fourth magnet portion 54 on the movable contact 40 side.

In this way, the fourth magnet portion 54 arranged on the other side in the direction intersecting the arrangement direction of the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40 when viewed from the contact / separation direction. The density of the magnetic flux flowing in the direction orthogonal to the arrangement direction can be increased by further providing. As a result, the contact pressure between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 can be increased more reliably.

Further, as shown in FIG. 7, the position of the first magnet portion 51 in the contact / separation direction with respect to the movable contact 40 (that is, the vertical direction in FIG. 7) and the contact / separation direction of the fourth magnet portion 54 with respect to the movable contact 40. The positions of the first magnets 51 may be the same as each other, and as shown in FIGS. 8 and 9, the direction of contact and separation of the first magnet portion 51 with respect to the movable contactor 40 (that is, the vertical direction of FIGS. 8 and 9). ) And the position of the fourth magnet portion 54 in the contact / separation direction with respect to the movable contactor 40 may be different from each other.

For example, the magnetism of the end of the first magnet portion 51 on the movable contact 40 side is the north pole, the magnetism of the end of the fourth magnet portion 54 on the movable contact 40 side is the north pole, and the first magnet. It is assumed that the position of the portion 51 in the contact / separation direction with respect to the movable contact 40 and the position of the fourth magnet portion 54 in the contact / separation direction with respect to the movable contact 40 are the same as each other. In this case, as shown in FIG. 7, the direction orthogonal to the arrangement direction of the first movable contact portion 41 and the second movable contact portion 42 from the first magnet portion 51 to the fourth magnet portion 54 (that is, FIG. 7). The magnetic flux flows in the A1 direction along the (left-right direction) and substantially orthogonal to the first flat surface 511 and the fourth flat surface 541. Due to the magnetic flux in the A1 direction, a Lorentz force acts on the movable contactor 40 in the F3 direction of FIG.

On the other hand, the magnetism of the end of the first magnet portion 51 on the movable contact 40 side is the north pole, the magnetism of the end of the fourth magnet portion 54 on the movable contact 40 side is the north pole, and the first magnet. It is assumed that the position of the portion 51 in the contact / separation direction with respect to the movable contactor 40 and the position of the fourth magnet portion 54 in the contact / separation direction with respect to the movable contactor 40 are different from each other. In this case, as shown in FIG. 9, the direction orthogonal to the arrangement direction of the first movable contact portion 41 and the second movable contact portion 42 from the first magnet portion 51 to the fourth magnet portion 54 (that is, FIG. 7). The magnetic flux flows in the A2 direction along the (left-right direction) and intersecting the first flat surface 511 and the fourth flat surface 541. Due to the magnetic flux in the A2 direction, a Lorentz force acts on the movable contactor 40 in the F3 direction of FIG.

In this way, even when the position of the first magnet portion 51 in the contact / separation direction with respect to the movable contact 40 and the position of the fourth magnet portion 54 in the contact / separation direction with respect to the movable contact 40 are different from each other. , The contact pressure between the movable contact portions 41, 42 and the corresponding fixed contact portions 33, 34 can be increased. That is, the degree of freedom in designing the electromagnetic relay 1 can be increased.

Further, in the electromagnetic relay 1, each of the second magnet portion 52 and the third magnet portion 53 is arranged symmetrically with respect to the center line CL2 of the movable contacts 40 extending in the arrangement direction when viewed from the contact / separation direction. However, it is not limited to this. For example, as shown in FIG. 6, in each of the second magnet portion 52 and the third magnet portion 54, the center lines 522 and 532 extending in the lateral direction when viewed from the contact / separation direction are the centers of the movable contacts 40. It may be arranged so as to be located on the first magnet portion 51 side with respect to the wire CL2.

As shown in FIG. 10, the electromagnetic relay 1 further includes an arc shield portion 70 arranged inside the accommodating portion 24 at intervals in a direction orthogonal to the contact / separation direction with respect to the movable contact 40. You may. The arc shield portion 70 is made of an insulating resin.

By providing the arc shield portion 70 in this way, for example, the magnet holder 25 is melted by the heat of the arc, and the magnetic deterioration of the magnet portions 51, 52, 53, 54, which are permanent magnets, is prevented. Can be done.

As shown in FIG. 10, the arc shield portion 70 is arranged between the magnet portions 51, 52, 53, 54 inside the accommodating portion 24 and the magnet holder 25, and contacts the movable contact 40. It may be arranged so as to surround it in the direction of separation. Further, although the arc shield portion 70 is not shown, inside the accommodating portion 24, the magnet portions 51, 52, 53, 54 and the fixed contact portions 33, 34 corresponding to the movable contact portions 41, 42 are formed. It may be arranged only between the magnet portions 51, 52, 53, 54 and the magnet holder 25 on the F1 direction side in which the arc generated between the magnets is attracted. In FIG. 10, the magnet holder 25 is omitted.

As shown in FIGS. 11 and 12, at least one of the first magnet portion 51, the second magnet portion 52, the third magnet portion 53, and the fourth magnet portion 54 may be composed of a permanent magnet. However, at least one of the first magnet portion 51, the second magnet portion 52, the third magnet portion 53, and the fourth magnet portion 54 may be composed of an electromagnet.

For example, as shown in FIG. 11, the first magnet portion 51 may be composed of an electromagnet, and the second to fourth magnet portions 52, 53, 54 may be composed of a permanent magnet. In FIG. 11, a current is supplied to the electromagnet constituting the first magnet portion 51 so that the polarity of the end portion on the movable contact 40 side becomes the north pole. Further, as shown in FIG. 12, the first magnet portion 51 and the fourth magnet portion 54 may be composed of an electromagnet, and the second magnet portion 52 and the third magnet portion 53 may be composed of a permanent magnet. In FIG. 12, a current is supplied to the electromagnet constituting the first magnet portion 51 so that the polarity of the end portion on the movable contact 40 side becomes N pole, and the electromagnet constituting the fourth magnet portion 54 is in movable contact. The current is supplied so that the polarity of the end on the child 40 side becomes the S pole.

In addition, although FIG. 11 and FIG. 12 have described the case where there are four magnet portions, the same applies to the case where there are three magnet portions. That is, in the electromagnetic relay 1 shown in FIGS. 3 and 4, at least one of the first magnet portion 51, the second magnet portion 52, and the third magnet portion 53 may be composed of a permanent magnet. At least one of the first magnet portion 51, the second magnet portion 52, and the third magnet portion 53 may be composed of an electromagnet.

As described above, at least one of the magnet portions 51, 52, 53, 54 can be composed of a permanent magnet, and at least one of the magnet portions 51, 52, 53, 54 can be composed of an electromagnet. The degree of freedom in designing the electromagnetic relay 1 can be increased.

As shown in FIGS. 13 to 18, a magnetic body 80 for connecting at least any two of the first magnet portion 51, the second magnet portion 52, the third magnet portion 53, and the fourth magnet portion 54 is further provided. You may. The magnetic material 80 is made of, for example, iron.

For example, in FIG. 13, the magnetic body 80 has a plate shape, and is provided so as to connect all the magnet portions 51, 52, 53, 54 and surround the entire movable contactor 40 around the contact / separation direction. There is. Further, in FIG. 14, the magnetic body 80 has a plate shape, and the second to fourth magnet portions 52, 53, 54 are connected so as to surround a part of the movable contactor 40 around the contact / separation direction. It is provided.

Further, in FIGS. 15 and 16, the magnetic body 80 connects the second to fourth magnet portions 52, 53, and 54, and surrounds a part of the movable contactor 40 around the contact and separation directions. And a second magnetic plate 82 that connects the first magnet portion 51 and the fourth magnet portion 54. Note that FIG. 16 is a plan view seen from the direction of the arrow XVI of FIG.

Further, in FIGS. 17 and 18, the magnetic body 80 connects the third magnetic plate 83 that connects the first magnet portion 51 and the fourth magnet portion 54, and the second magnet portion 52 and the third magnet portion 53. It is composed of a fourth magnetic plate 84. Note that FIG. 18 is a plan view seen from the direction of arrow XVIII in FIG.

Although the case where there are four magnet portions has been described with reference to FIGS. 13 to 18, the same applies to the case where there are three magnet portions. That is, even if the electromagnetic relay 1 shown in FIGS. 3 and 4 is further provided with a magnetic body 80 that connects at least any two of the first magnet portion 51, the second magnet portion 52, and the third magnet portion 53. good.

In this way, by providing the magnetic body 80 that connects at least any two of the magnet portions 51, 52, 53, 54, various magnet arrangements can be realized, so that the degree of freedom in designing the electromagnetic relay 1 is increased. be able to.

As shown in FIGS. 19 and 20, the first movable contact portion 41 contacts or opens the first fixed contact portion 33, and the second movable contact portion 42 contacts or opens the second fixed contact portion 34. The inside of the contact case 20 is located in the area of the contact case 20 where the arc generated when the magnets are separated is attracted by the first magnet portion 51, the second magnet portion 52, the third magnet portion 53, and the fourth magnet portion 54. A through hole 90 may be provided to communicate with the outside of the contact case 20.

In FIG. 19, the end of the first magnet portion 51 on the movable contact 40 side has the polarity (that is, the S pole) of the end of each of the second magnet portion 52 and the third magnet portion 53 on the movable contact 40 side. It has polarities (that is, N poles) different from each other, and a current flows along the C direction in FIG. At this time, the arc generated between the first fixed contact portion 33 and the first movable contact portion 41 is stretched in the F1 direction by the magnetic flux in the B1 direction, and the second fixed contact portion 34 and the second movable contact portion 42 The arc generated between them is stretched in the F2 direction by the magnetic flux in the B2 direction. Due to the heat of the stretched arc, for example, the resin magnet holder 25 may be melted and gas may be generated inside the accommodating portion 24. The generated gas flows along the arrow 91 in FIG. 19 and is discharged from the accommodating portion 24 to the outside of the contact case 20 through the through hole 90.

In FIG. 20, the end portion of the first magnet portion 51 on the movable contact 40 side has the polarity (that is, the S pole) of the end portion of the second magnet portion 52 and the third magnet portion 53 on the movable contact 40 side. Has different polarities (that is, N poles) from each other, and goes in the direction opposite to the C direction in FIG. 5 (that is, from the second fixed terminal 32 through the movable contact 40 toward the first fixed terminal 31. Current is flowing along the direction). At this time, the arc generated between the first fixed contact portion 33 and the first movable contact portion 41 is stretched in the F3 direction by the magnetic flux in the B1 direction, and the second fixed contact portion 34 and the second movable contact portion 42 The arc generated between them is stretched in the F4 direction by the magnetic flux in the B2 direction. The gas generated by the heat of the stretched arc flows along the arrow 92 in FIG. 20 and is discharged from the accommodating portion 24 to the outside of the contact case 20 through the through hole 90.

In addition, although FIG. 19 and FIG. 20 have described the case where there are four magnet portions, the same applies to the case where there are three magnet portions. That is, in the electromagnetic relay 1 shown in FIGS. 3 and 4, the arc generated when each of the movable contact portions 41, 42 contacts or opens the corresponding fixed contact portions 33, 34 is the first magnet portion 51. , A through hole 90 that communicates with the inside of the contact case 20 and the outside of the contact case 20 may be provided in the region of the contact case 20 attracted by the second magnet portion 52 and the third magnet portion 53. ..

In this way, the arc generated when each of the movable contact portions 41, 42 contacts or opens the corresponding fixed contact portions 33, 34 is attracted by the magnet portions 51, 52, 53, 54. By providing a through hole 90 that communicates with the inside of the contact case 20 and the outside of the contact case 20 in the area of the case 20, the gas generated due to the generated arc is discharged from the accommodating portion 24 to the outside of the contact case 20. Flow toward. This gas flow makes it easier to stretch the arc and easily extinguish it.

In the electromagnetic relay 1, when the movable contact 40 approaches the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41 and 42 come into contact with the corresponding fixed contact portions 33 and 34 to make movable contact. When the child 40 is separated from the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41 and 42 are configured to be separated from the corresponding fixed contact portions 33 and 34. Not exclusively. In the electromagnetic relay 1, for example, as shown in FIG. 21, when the movable contact 40 is separated from the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41 and 42 correspond to the fixed contact portions. When the movable contact 40 approaches the first fixed terminal 31 and the second fixed terminal 32 in contact with 33, 34, the movable contact portions 41, 42 are separated from the corresponding fixed contact portions 33, 34. It may be configured as. That is, the electromagnetic drive unit 60 is arranged outside the contact case 20 and on the separation direction side where the movable contact portions 41, 42 are separated from the fixed contact portions 33, 34 corresponding to the contact case 20, and each movable. Not only when the contact portions 41 and 42 are arranged on the side opposite to the electromagnetic drive portion 60 side of the movable contact 40, the electromagnetic drive portion 60 is movable outside the contact case 20 and with respect to the contact case 20. The contact portions 41, 42 may be arranged on the contact direction side in contact with the corresponding fixed contact portions 33, 34, and the movable contact portions 41, 42 may be arranged on the electromagnetic drive portion 60 side of the movable contact 40.

Although various embodiments of the present invention have been described in detail with reference to the drawings, finally, various aspects of the present invention will be described.

The electromagnetic relay according to the first aspect of the present invention is
A first fixed terminal and a second fixed terminal which are electrically independent of each other and have a first fixed contact portion and a second fixed contact portion, respectively.
Each of the first movable contact portion and the second movable contact portion has the first movable contact portion and the second movable contact portion facing the first fixed contact portion and the second fixed contact portion, respectively. 1 Movable contacts arranged so as to be movable in the contact / separation direction to contact or open the fixed contact portion and the second fixed contact portion.
A first magnet portion arranged on one side of the movable contactor in a direction intersecting the arrangement direction of the first movable contact portion and the second movable contact portion when viewed from the contact / separation direction.
The second magnet portion and the third magnet portion which are arranged on both sides of the movable contactor in the arrangement direction when viewed from the contact / separation direction and whose ends on the movable contact side have the same polarity with each other. With and
The end portion of the first magnet portion on the movable contact side has a polarity different from the polarity of the end portion of the second magnet portion and the third magnet portion on the movable contact side.

According to the electromagnetic relay of the first aspect, for example, the end of the first magnet portion on the movable contact side is the north pole, and the end of the second magnet portion and the third magnet portion on the movable contact side is the south pole. In some cases, the magnetic flux flows from the first magnet portion toward the second magnet portion and the third magnet portion, and the magnetic flux flows from the first magnet portion in the direction intersecting the arrangement direction. As a result, the magnetic flux flowing between the first magnet portion, the second magnet portion, and the third magnet portion causes the arc generated between each movable contact portion and the corresponding fixed contact portion to be generated in the space around the movable contact. On the other hand, the magnetic flux flowing from the first magnet portion in the direction intersecting the arrangement direction can increase the contact pressure between each movable contact portion and the corresponding fixed contact portion. That is, it is possible to improve the contact reliability between each movable contact portion and the corresponding fixed contact portion while improving the breaking performance of the arc generated between each movable contact portion and the corresponding fixed contact portion.

The electromagnetic relay according to the second aspect of the present invention is
Further, a fourth magnet portion arranged on the other side in a direction intersecting the arrangement direction of the first movable contact portion and the second movable contact portion of the movable contact when viewed from the contact / separation direction is further provided.
The end portion of the fourth magnet portion on the movable contact side has a polarity different from that of the end portion of the first magnet portion on the movable contact side.

According to the electromagnetic relay of the second aspect, the density of the magnetic flux flowing in the direction orthogonal to the arrangement direction can be increased, so that the contact pressure between each movable contact portion and the corresponding fixed contact portion can be increased more reliably. Can be done.

The electromagnetic relay according to the third aspect of the present invention is
The position of the first magnet portion in the contact / separation direction with respect to the movable contactor and the position of the fourth magnet portion in the contact / separation direction with respect to the movable contact are different from each other.

According to the electromagnetic relay of the third aspect, the position of the first magnet portion in the contact / separation direction with respect to the movable contactor and the position of the fourth magnet portion in the contact / separation direction with respect to the movable contact are different from each other. However, the contact pressure between each movable contact portion and the corresponding fixed contact portion can be increased. That is, the degree of freedom in designing the electromagnetic relay can be increased.

The electromagnetic relay according to the fourth aspect of the present invention is
The first magnet portion is arranged between the first movable contact portion and the second movable contact portion.

According to the electromagnetic relay of the fourth aspect, the magnetic flux in the direction intersecting the arrangement direction flows between the first movable contact portion and the second movable contact portion, so that between each movable contact portion and the corresponding fixed contact portion. The arc generated in the above can be reliably extended by the space around the movable contact, and the contact pressure between each movable contact portion and the corresponding fixed contact portion can be increased more reliably. That is, while improving the breaking performance of the arc generated between each movable contact part and the corresponding fixed contact part more reliably, the contact reliability between each movable contact part and the corresponding fixed contact part is more surely improved. Can be enhanced.

The electromagnetic relay according to the fifth aspect of the present invention is
Each of the second magnet portion and the third magnet portion is arranged symmetrically with respect to the center line of the movable contactor extending in a direction orthogonal to the arrangement direction when viewed from the contact / separation direction.

According to the electromagnetic relay of the fifth aspect, the arc generated between each movable contact portion and the corresponding fixed contact portion is surely extended by the space around the movable contact, and the fixed contact corresponding to each movable contact portion. The contact pressure between the parts can be increased more reliably. That is, while improving the breaking performance of the arc generated between each movable contact part and the corresponding fixed contact part more reliably, the contact reliability between each movable contact part and the corresponding fixed contact part is more surely improved. Can be enhanced.

The electromagnetic relay according to the sixth aspect of the present invention is
The first magnet portion has a first flat surface at an end on the movable contact side, and the second magnet portion has a second flat surface at an end on the movable contact side. The three magnet portions have a third flat surface at the end on the movable contact side.
The first flat surface is arranged parallel to the virtual straight line extending in the arrangement direction when viewed from the contact / separation direction, and the second flat surface and the third flat surface are viewed from the contact / separation direction. , Are arranged so as to be orthogonal to the virtual straight line.

According to the electromagnetic relay of the sixth aspect, the arc generated between each movable contact portion and the corresponding fixed contact portion is surely extended by the space around the movable contact, and the fixed contact corresponding to each movable contact portion. The contact pressure between the parts can be increased more reliably. That is, while improving the breaking performance of the arc generated between each movable contact part and the corresponding fixed contact part more reliably, the contact reliability between each movable contact part and the corresponding fixed contact part is more surely improved. Can be enhanced.

The electromagnetic relay according to the seventh aspect of the present invention is
The movable contact is further provided with an arc shield portion arranged at intervals in a direction orthogonal to the contact / separation direction.

According to the electromagnetic relay of the seventh aspect, since the arc shield portion is provided, for example, when each magnet portion is composed of a permanent magnet, its magnetic deterioration can be prevented.

The electromagnetic relay according to the eighth aspect of the present invention is
A magnetic material that connects at least any two of the first magnet portion, the second magnet portion, and the third magnet portion is further provided.

According to the electromagnetic relay of the eighth aspect, the degree of freedom in designing the electromagnetic relay can be increased.

The electromagnetic relay according to the ninth aspect of the present invention is
At least one of the first magnet portion, the second magnet portion, and the third magnet portion is composed of a permanent magnet.

According to the electromagnetic relay of the ninth aspect, the degree of freedom in designing the electromagnetic relay can be increased.

The electromagnetic relay according to the tenth aspect of the present invention is
At least one of the first magnet portion, the second magnet portion, and the third magnet portion is composed of an electromagnet.

According to the electromagnetic relay of the tenth aspect, the degree of freedom in designing the electromagnetic relay can be increased.

The electromagnetic relay according to the eleventh aspect of the present invention is
A box-shaped insulating contact case in which the first fixed contact portion, the second fixed contact portion, and the movable contact are arranged inside is provided.
The arc generated when the first movable contact portion contacts or opens with respect to the first fixed contact portion and the second movable contact portion contacts or opens with respect to the second fixed contact portion is described as described above. A through hole is provided in the area of the contact case attracted by the first magnet portion, the second magnet portion, and the third magnet portion to communicate with the inside of the contact case and the outside of the contact case. There is.

According to the electromagnetic relay of the eleventh aspect, the contact case is located in the area of the contact case where the arc generated when each movable contact portion contacts or opens the corresponding fixed contact portion is attracted by each magnet portion. By providing a through hole that communicates with the inside of the magnet and the outside of the contact case, the gas generated by the generated arc flows from the accommodating portion toward the outside of the contact case. This gas flow makes it easier to stretch the arc and easily extinguish it.

By appropriately combining any of the various embodiments or modifications, the effects of each can be achieved. In addition, combinations of embodiments or examples or combinations of embodiments and examples are possible, and features in different embodiments or examples are also possible.

The electromagnetic relay of the present invention can be applied to, for example, an automobile.

1 Electromagnetic relay 10 Housing 11 Case 111 Bottom wall 12 Cover 121 Bottom wall 13 Terminal hole 20 Contact case 21 Ceramic plate 22 Flange 23 1st yoke 231 Through hole 24 Accommodating part 25 Magnet holder 251 Through hole 31 1st fixed terminal 32 2nd fixed terminal 33 1st fixed contact part 34 2nd fixed contact part 35 Movable shaft 351 Flange part 352 Coil spring holding part 36 Coil spring 40 Movable contactor 41 1st movable contact part 42 2nd movable contact part 51 1st Magnet part 511 Flat surface 52 Second magnet part 521 Flat surface 53 Third magnet part 531 Flat surface 54 Fourth magnet part 541 Flat surface 60 Electromagnetic drive part 61 Electromagnet part 611 Through hole 62 Spool 63 Coil 64 Second yoke 65 Movable iron piece 66 Fixed iron piece 661 Through hole 67 Return spring 70 Arc shield 80 Magnetic material 81 1st magnetic plate 82 2nd magnetic plate 83 3rd magnetic plate 84 4th magnetic plate 90 Through hole CL1 to CL3 Center line F1 to F4 Direction A ~ C direction P intersection 100 space

Claims (10)

A first fixed terminal and a second fixed terminal which are electrically independent of each other and have a first fixed contact portion and a second fixed contact portion, respectively.
Each of the first movable contact portion and the second movable contact portion has the first movable contact portion and the second movable contact portion facing the first fixed contact portion and the second fixed contact portion, respectively. 1 Movable contacts arranged so as to be movable in the contact / separation direction to contact or open the fixed contact portion and the second fixed contact portion.
A first magnet portion arranged on one side of the movable contactor in a direction intersecting the arrangement direction of the first movable contact portion and the second movable contact portion when viewed from the contact / separation direction.
The second magnet portion and the third magnet portion which are arranged on both sides of the movable contactor in the arrangement direction when viewed from the contact / separation direction and whose ends on the movable contact side have the same polarity with each other. With and
The end of the first magnet portion on the movable contact side has a polarity different from that of the end of the second magnet portion and the third magnet portion on the movable contact side.
Further, a fourth magnet portion arranged on the other side in the direction intersecting the arrangement direction when viewed from the contact / separation direction is further provided.
An electromagnetic relay in which the end of the fourth magnet portion on the movable contact side has a polarity different from that of the end of the first magnet portion on the movable contact side. The position of the contact and separation direction relative to the movable contact of the first magnet portion, and the said contact and separation direction position relative to the movable contact of the fourth magnet portion are different from each other, according to claim 1 solenoid relay. The electromagnetic relay according to claim 1 or 2 , wherein the first magnet portion is arranged between the first movable contact portion and the second movable contact portion. Each of the second magnet portion and the third magnet portion is arranged symmetrically with respect to the center line of the movable contact extending in a direction orthogonal to the arrangement direction when viewed from the contact / separation direction. An electromagnetic relay according to any one of items 1 to 3. The first magnet portion has a first flat surface at an end on the movable contact side, and the second magnet portion has a second flat surface at an end on the movable contact side. The three magnet portions have a third flat surface at the end on the movable contact side.
The first flat surface is arranged parallel to the virtual straight line extending in the arrangement direction when viewed from the contact / separation direction, and the second flat surface and the third flat surface are viewed from the contact / separation direction. , An electromagnetic relay according to any one of claims 1 to 4 , which is arranged so as to be orthogonal to the virtual straight line. The electromagnetic relay according to any one of claims 1 to 5 , further comprising an arc shield portion arranged at intervals in a direction orthogonal to the contact / detachment direction with respect to the movable contact. The electromagnetic relay according to any one of claims 1 to 6 , further comprising a magnetic material that connects at least two of the first magnet portion, the second magnet portion, and the third magnet portion. The electromagnetic relay according to any one of claims 1 to 7 , wherein at least one of the first magnet portion, the second magnet portion, and the third magnet portion is composed of a permanent magnet. The electromagnetic relay according to any one of claims 1 to 7 , wherein at least one of the first magnet portion, the second magnet portion, and the third magnet portion is composed of an electromagnet. A box-shaped insulating contact case in which the first fixed contact portion, the second fixed contact portion, and the movable contact are arranged inside is provided.
The arc generated when the first movable contact portion contacts or opens with respect to the first fixed contact portion and the second movable contact portion contacts or opens with respect to the second fixed contact portion is the arc. A through hole that communicates with the inside of the contact case and the outside of the contact case is provided in the region of the contact case attracted by the first magnet portion, the second magnet portion, and the third magnet portion. The electromagnetic relay according to any one of claims 1 to 9.

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