JP2019036431A - Electromagnetic relay - Google Patents

Abstract

To provide an electromagnetic relay that can improve contact reliability between movable contact parts and corresponding stationary contact parts, while improving the performance to break the arcs generated between the movable contact parts and the corresponding stationary contact parts.SOLUTION: An electromagnetic relay comprises: a first stationary terminal and a second stationary terminal that have a first stationary contact part and a second stationary contact part, respectively; a movable contactor that has a first movable contact part and a second movable contact part; a first magnet part that is arranged, when viewed from a contact/separation direction, one side of the movable contactor in a direction intersecting the arrangement direction; and a second magnet part and a third magnet part that are arranged respectively on both sides of the movable contactor in the arrangement direction and have the same polarity as each other on their ends toward the movable contactor. The polarity of the end toward the movable contactor of the first magnet part and the polarity of the ends toward the movable contactor of the second magnet part and third magnet part are different from each other.SELECTED DRAWING: Figure 3

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 able to contact and separate from each fixed contact portion, and each movable contact portion corresponds to An electromagnetic relay is disclosed that includes a movable plate that can move in a contact / separation direction that contacts or separates from a fixed contact portion. The electromagnetic relay is provided with a first arc extinguishing permanent magnet and a second arc extinguishing permanent magnet, respectively, on both sides of the movable plate in the short direction of the movable plate as seen from the contact / separation direction, A third arc extinguishing permanent magnet and a fourth arc extinguishing permanent magnet are respectively provided on both sides of the movable plate in the longitudinal direction of the movable plate.

Japanese Patent Laid-Open No. 2006-45504

  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 opposing end faces become N poles, and the third arc extinguishing permanent magnet and the fourth arc extinguishing permanent magnet The arc extinguishing permanent magnet is arranged so that the magnetic poles of the opposing end faces are S poles. That is, in the electromagnetic relay, a magnetic flux flows from each of the first arc extinguishing permanent magnet and the second arc extinguishing permanent magnet toward the third arc extinguishing permanent magnet and the fourth 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 interruption performance, while the fixed contact portion corresponding to each movable contact portion and In some cases, the contact reliability between the movable contact portions and the corresponding fixed contact portions cannot be increased by increasing the contact pressure between the contact points. For example, if the contact pressure between each movable contact part and the corresponding fixed contact part is insufficient, each movable contact part may be separated from the corresponding fixed contact part, causing smoke and fire. Therefore, it is necessary to increase the size of the electromagnetic relay.

  Therefore, the present invention improves the contact reliability between each movable contact portion and the corresponding fixed contact portion while enhancing the interruption performance of the arc generated between each movable contact portion and the corresponding fixed contact portion. It is an object of the present invention to provide an electromagnetic relay that can be used.

The electromagnetic relay of one embodiment of the present invention is
A first fixed terminal and a second fixed terminal, which are arranged electrically independent from each other and have a first fixed contact portion and a second fixed contact portion, respectively;
The first movable contact portion and the second movable contact portion are respectively opposed to the first fixed contact portion and the second fixed contact portion, and each of the first movable contact portion and the second movable contact portion is the first movable contact portion. A movable contact disposed so as to be movable in a contact / separation direction that contacts or separates from one fixed contact portion and the second fixed contact portion;
A first magnet portion disposed on one side of a direction intersecting the arrangement direction of the first movable contact portion and the second movable contact portion of the movable contact, as viewed from the contact / separation direction;
A second magnet part and a third magnet part, which are respectively disposed on both sides of the movable contact in the arrangement direction as viewed from the contact / separation direction, and whose end parts on the movable contact side have the same polarity. And
The end of the first magnet portion on the movable contact side has a polarity different from the polarities of the end portions 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 end portions on the movable contact side of the first magnet portion are different from the polarities of the end portions on the movable contact side of the second magnet portion and the third magnet portion, respectively. have. For this reason, for example, when the end on the movable contact side of the first magnet part is an N pole, and the end on the movable contact side of the second magnet part and the third magnet part is an S pole, the first magnet part While the magnetic flux flows from the first magnet portion toward the second magnet portion and the third magnet portion, the magnetic flux flows in a direction intersecting the arrangement direction from the first magnet portion. As a result, an arc generated between each movable contact portion and the corresponding fixed contact portion due to the magnetic flux flowing between the first magnet portion, the second magnet portion, and the third magnet portion is a space around the movable contact. While the magnetic flux flowing in the direction intersecting the arrangement direction from the first magnet portion intersects with the current flowing through the movable contact, the Lorentz force generated by the first magnet portion and the corresponding fixed contact portion 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 performance of interrupting 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 drawing along the II-II line of FIG. The top view of the state which removed the cover and ceramic plate of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating arrangement | positioning of the magnet part of the electromagnetic relay of FIG. The front schematic diagram for demonstrating arrangement | positioning of the magnet part of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 1st modification of the electromagnetic relay of FIG. The side surface schematic diagram for demonstrating the 1st modification of the electromagnetic relay of FIG. The front schematic diagram for demonstrating the 2nd modification of the electromagnetic relay of FIG. The side surface schematic diagram for demonstrating the 2nd modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 3rd modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 4th modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 5th modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 6th modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 7th modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 8th modification of the electromagnetic relay of FIG. The side surface schematic diagram for demonstrating the 8th modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 9th modification of the electromagnetic relay of FIG. The side surface schematic diagram for demonstrating the 9th modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 10th modification of the electromagnetic relay of FIG. The plane schematic diagram for demonstrating the 11th modification of the electromagnetic relay of FIG. The front schematic diagram for demonstrating the 12th 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 indicating specific directions or positions as necessary (for example, terms including “up”, “down”, “right”, “left”, “end”, “side”) However, the use of these terms is to facilitate understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of these terms. Further, the following description is merely illustrative in nature and is not intended to limit the present invention, its application, or its use. Furthermore, the drawings are schematic, and the ratios of dimensions and the like do not necessarily match the actual ones.

  As shown in FIGS. 1 to 3, the electromagnetic relay 1 according to one embodiment of the present invention includes a first fixed terminal 31 and a second fixed terminal 32 that are arranged electrically independently from each other, and each fixed terminal 31. The movable contact 40 arranged so as to be movable in the direction approaching or separating from the first contact 32 and the first to third arranged around the movable contact 40 in a direction crossing the moving direction of the movable contact 40. 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, as an example, an insulating housing 10 and a contact case 20 (shown in FIG. 2) provided inside the housing 10, and includes a first fixed terminal 31 and a second fixed terminal 31. The fixed terminals 32 are respectively fixed to the contact case 20, the movable contacts are arranged inside the contact case 20, and the first to third magnet parts 51, 52, 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. The movable contact 40 has a first movable contact portion 41 and a second movable contact portion 42 that face the first fixed contact portion 33 and the second fixed contact portion 34, respectively.

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

  As shown in FIG. 1, the housing 10 includes 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 an opening surface is provided 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. The bottom wall 121 of the cover 12 that faces the opening surface of the cover 12 is provided with two circular terminal holes 13 that are spaced apart 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 includes a ceramic plate 21, a flange portion 22, and a first yoke 23, as shown in FIG. 2, and a housing portion 24 is formed therein.

  The ceramic plate 21 is disposed 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. A first fixed terminal 31 and a second fixed terminal 32 are fixed to the ceramic plate 21. The flange portion 22 extends from the end of the ceramic plate 21 on the opening surface side of the cover 12 (that is, the lower side in FIG. 2) toward the bottom wall portion 111 of the case 11 facing the opening surface of the case 11. To the inside of the case 11. The first yoke 23 is disposed 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 is provided along the center line CL <b> 1 at a substantially central portion of the first yoke 23.

  In addition, an insulating magnet holder 25 that holds the first to third magnet portions 51, 52, and 53 is provided inside the housing portion 24. The magnet holder 25 penetrates the first yoke 23 along the flange portion 22 and the first yoke 23 from a portion farther from the center line CL1 than the first fixed terminal 31 and the second fixed terminal 32 of the ceramic plate 21. 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 is provided along the center line CL <b> 1 at a substantially central portion of the magnet holder 25. A substantially cylindrical rod-like movable shaft 35 is disposed in the through hole 251 so as to be movable along the center line CL1.

  The movable shaft 35 extends from the housing portion 24 to the outside of the contact case 20, and a movable contact 40 is connected to the end portion on the housing portion 24 side. The movable iron piece 65 of the drive unit 60 is connected. A flange portion 351 extending from the movable shaft 35 in a direction orthogonal to the center line CL1 is provided at an intermediate portion of the accommodating portion 24 of the movable shaft 35. The flange 351 is arranged so as to be able to come into contact with a region around the through hole 251 of the magnet holder 25 when the movable contact portions 41 and 42 move in a direction away from the corresponding fixed contact portions 33 and 34. Thus, the moving range of the movable shaft 35 and the movable contact 40 is restricted. A coil spring 36 that extends and contracts along the movable shaft 35 is provided around the movable shaft 35 in the housing portion 24. The coil spring 36 is disposed between the coil spring holding portion 352 that is locked to the flange portion 351 of the movable shaft 35 and the movable contact 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 fixed to the ceramic plate 21 electrically independently from each other. Each of the first fixed terminal 31 and the second fixed terminal 32 is arranged with a space therebetween along the arrangement direction (that is, the left-right direction in FIG. 2), and a part of the first fixed terminal 31 and the second fixed terminal 32 are located in the accommodating portion 24. Yes.

  As shown in FIG. 2, a first fixed contact portion 33 and a second fixed contact portion 34 are provided on the end surfaces 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 contact 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 that face the first fixed contact portion 33 and the second fixed contact portion 34, respectively. A movable shaft 35 that is movable along the center line CL <b> 1 is connected to a substantially central portion of the movable contact 40. That is, each of the first movable contact portion 41 and the second movable contact portion 42 contacts or separates along the center line CL1 with respect to the first fixed contact portion 33 and the second fixed contact portion 34, and the movable contact 40 The first movable contact part 41 and the second movable contact part 42 are arranged so as to be movable in the contact / separation direction in which the first fixed contact part 33 and the second fixed contact part 34 are in contact with or separated from each other. . Further, the first movable contact portion 41 and the second movable contact portion 42 are electrically connected to each other by the 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, 53 is configured by a substantially rectangular parallelepiped permanent magnet. In FIG. 3, the cover 12 and the ceramic plate 21 are omitted.

  The first magnet unit 51 is movable contacted when viewed from the contact / separation direction (that is, the through direction in FIG. 3) in which each movable contact unit 41, 42 contacts or separates from the corresponding fixed contact unit 33, 34. The first movable contact portion 41 and the second movable contact portion 42 of the child 40 are disposed on one side in a direction intersecting (for example, orthogonal to) the arrangement direction of the first movable contact portion 42 (that is, the left-right direction in FIG. 3) and held by the magnet holder 25. Has been. Specifically, the first magnet unit 51 has a first flat surface 511 at the end on the movable contact 40 side, and the first flat surface 511 is viewed from the contact / separation direction, and the first movable contact unit 41 and It arrange | positions in parallel with respect to the centerline CL2 of the movable contact 40 which is a virtual straight line extended in the sequence direction of the 2nd movable contact part 42 (namely, longitudinal direction of the movable contact 40).

  Each of the second magnet unit 52 and the third magnet unit 53 is disposed on both sides of the movable contact 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 unit 52 and the third magnet unit 53 has a second flat surface 521 and a third flat surface 531 at the end on the movable contact 40 side, and the second flat surface 521 and The third flat surface 531 is arranged so as to be orthogonal to the center line CL2 of the movable contact 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. Yes.

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

  Further, the first magnet part 51 is disposed between the first movable contact part 41 and the second movable contact part 42 of the movable contact 40. Specifically, the first magnet portion 51 is disposed symmetrically with respect to the center line CL3 of the movable contact 40 extending in a 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 includes a center line CL2 of the movable contact 40 extending in the arrangement direction and a center line of the movable contact 40 extending in the direction intersecting the arrangement direction when viewed from the contact / separation direction. They are 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 CL <b> 1 and having a movable shaft 35 disposed at a substantially central part, and the electromagnet unit 61 together with the first yoke 23. The first yoke 23 and the second yoke 64 surrounding the movable shaft 35, the movable iron piece 65 disposed 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. And a fixed iron piece 66 connected to the first yoke 23. The electromagnetic drive unit 60 drives the movable shaft 35 in accordance with excitation / de-excitation of the electromagnetic drive unit 61.

  The electromagnet portion 61 includes 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. Yes. The second yoke 64 has, for example, a substantially U shape in the sectional view shown in FIG. One end of the fixed iron piece 66 is located between the first yoke 23 and the magnet holder 25 in a direction intersecting the center line CL1. A through hole 661 extending along the center line CL <b> 1 is provided in a substantially central portion of the fixed iron piece 66. The movable shaft 35 is disposed in the through hole 661 so as to be movable along the center line CL1 with a gap. Further, a return spring 67 is provided between the fixed iron piece 66 and the movable iron piece 65 in the through hole 611 of the electromagnet portion 61.

  When the current is supplied to the coil 63 of the electromagnet portion 61 in the electromagnetic relay 1 in the return state shown in FIG. 2 (that is, the movable contact portions 41 and 42 corresponding to the fixed contact portions 33 and 34 are separated), A magnetic attractive force is generated between the movable iron piece 65 and the fixed iron piece 66 connected to the shaft 35. Due to this magnetic attractive force, 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 toward 24. As a result, the movable contact 40 moves in the direction approaching the first fixed terminal 31 and the second fixed terminal 32 along the contact / separation direction, and each movable contact portion 41, 42 is moved to the corresponding fixed contact portion 33, 34. The electromagnetic relay 1 is brought into operation from the return state by contact.

  Further, in the electromagnetic relay 1 in the operating state, when the supply of current to the coil 63 of the electromagnet unit 61 is stopped, the magnetic attractive force that has attracted the movable iron piece 65 disappears, and the movable spring 65 is moved by the elastic force of the return spring 67. The shaft 35 moves from the housing 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 contact / separation direction, and each of the movable contact portions 41, 42 opens from the corresponding fixed contact portion 33, 34. The electromagnetic relay 1 returns from the operating state to the returning state.

  That is, the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40 are moved relative to the first fixed contact portion 33 and the second fixed contact portion 34 by the movement along the contact / separation direction of the movable shaft 35. Touch or release.

  In the electromagnetic relay 1, the end of the first magnet unit 51 on the movable contact 40 side is the polarity of the end of each of the second magnet unit 52 and the third magnet unit 53 on the movable contact 40 side (that is, S Poles) have mutually different polarities (ie, N poles). Therefore, as shown in FIG. 4, the magnetic flux flows from the first magnet unit 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, a magnetic flux flows from the first magnet part 51 through the first movable contact part 41 along the B1 direction toward the second magnet part 52, and from the first magnet part 51 through the second movable contact part 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 along the C direction from the first fixed terminal 31 through the movable contact 40 toward the second fixed terminal 32. 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 by the magnetic flux in the B1 direction, and the magnetic flux in the B2 direction A 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, the 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 and 42 and the corresponding fixed contact portions 33 and 34 is moved from the contact / separation direction to the space around the movable contact 40 (in this case, as shown in FIG. 3). As seen, the arcs can be extinguished by extending to the space 100 on the opposite side of the first magnet part 51 with respect to the intersection P of the two center lines CL2, CL3 of the movable contact 40, while each movable contact part 41, The contact pressure between the fixed contact portions 33 and 34 corresponding to 42 can be increased. That is, while improving the interruption | blocking performance of the arc generate | occur | produced between each fixed contact part 33 and 34 corresponding to each movable contact part 41 and 42, each fixed contact part 33 and 34 corresponding to each movable contact part 41 and 42 is improved. It is possible to improve the contact reliability between.

  Further, the first magnet part 51 is disposed between the first movable contact part 41 and the second movable contact part 42. Thereby, since 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, the fixed contact portions 33, 34 corresponding to the movable contact portions 41, 42 and The contact pressure between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 can be more reliably increased while the arc generated between the movable contact portions 40 is reliably stretched by the space around the movable contact 40. it can. That is, the fixed contact portion 33 corresponding to each movable contact portion 41, 42 is more reliably improved while the performance of interrupting the arc generated between each movable contact portion 41, 42 and the corresponding fixed contact portion 33, 34 is more reliably improved. The contact reliability with 34 can be improved more reliably.

  Moreover, each of the 2nd magnet part 52 and the 3rd magnet part 53 is arrange | positioned symmetrically with respect to the centerline CL3 of the movable contact 40 extended in the direction orthogonal to an arrangement direction seeing from the contact / separation direction. Further, the first magnet unit 51 has the first flat surface 511 at the end on the movable contact 40 side, and the second magnet unit 52 has the second flat surface 521 at the end on the movable contact 40 side. And the 3rd magnet part 53 has the 3rd flat surface 531 in the edge part by the side of the movable contact 40. FIG. The first flat surface 511 is disposed parallel to the center line CL2 of the movable contact 40 that 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. As seen from the contact / separation direction, the movable contact 40 is disposed so as to be orthogonal to the center line CL2. As a result, the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 is reliably stretched by the space around the movable contact 40 and can be associated with the movable contact portions 41 and 42. Thus, the contact pressure between the fixed contact portions 33 and 34 can be increased more reliably. That is, the fixed contact portion 33 corresponding to each movable contact portion 41, 42 is more reliably improved while the performance of interrupting the arc generated between each movable contact portion 41, 42 and the corresponding fixed contact portion 33, 34 is more reliably improved. The contact reliability with 34 can be improved more reliably.

  In the electromagnetic relay 1, the first magnet portion 51 is disposed between the first movable contact portion 41 and the second movable contact portion 42, but is not limited thereto. Further, the second magnet part 52 and the third magnet part 53 are seen from the contact / separation direction, 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. Although it arrange | positions symmetrically with respect to CL3, it is not restricted to this. Further, the first flat surface 511 of the first magnet unit 51 is disposed in 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 formed. Although it is arranged so as to be orthogonal to the center line CL2 of the movable contact 40 when viewed from the contact / separation direction, the present invention is not limited to this. The first magnet unit 51 is disposed on one side of the direction intersecting the arrangement direction when viewed from the approaching / separating direction, and the second magnet unit 52 and the third magnet unit 53 are arranged in the arrangement direction when viewed from the approaching / separating direction. What is necessary is just to each arrange | position at the both sides of the movable contact 40, and can arrange | position in arbitrary positions according to the design etc. of the electromagnetic relay 1. FIG.

  As shown in FIG. 6, the electromagnetic relay 1 includes an 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 penetration direction in FIG. 6). You may further provide the 4th magnet part 54 arrange | positioned on the other side (namely, upper side of FIG. 6 with respect to the movable contact 40) of the direction which cross | intersects a direction.

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

  In addition, the 4th magnet part 54 may be arrange | positioned symmetrically with the 1st magnet part 51 with respect to the centerline CL2 extended in the sequence direction of the movable contact 40. FIG. 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 unit 54 on the movable contact 40 side.

  As described above, when viewed from the contact / separation direction, the fourth magnet portion 54 disposed 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. Can further increase the density of magnetic flux flowing in a direction orthogonal to the arrangement direction. Thereby, the contact pressure between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 can be more reliably increased.

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

  For example, the magnetism at the end of the first magnet portion 51 on the movable contact 40 side is N pole, the magnetism at the end of the fourth magnet portion 54 on the movable contact 40 side is N pole, and the first magnet It is assumed that the position of the part 51 in the contact / separation direction with respect to the movable contact 40 and the position of the fourth magnet part 54 in the contact / separation direction with respect to the movable contact 40 are the same. In this case, as shown in FIG. 7, the direction perpendicular to the arrangement direction of the first movable contact portion 41 and the second movable contact portion 42 from the first magnet portion 51 toward the fourth magnet portion 54 (that is, FIG. 7). ) In the A1 direction substantially perpendicular 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 contact 40 in the F3 direction of FIG.

  On the other hand, the magnetism at the end of the first magnet portion 51 on the movable contact 40 side is N pole, the magnetism at the end of the fourth magnet portion 54 on the movable contact 40 side is N pole, and the first magnet It is assumed that the position of the part 51 in the contact / separation direction with respect to the movable contact 40 is different from the position of the fourth magnet part 54 in the contact / separation direction with respect to the movable contact 40. In this case, as shown in FIG. 9, a direction perpendicular to the arrangement direction of the first movable contact portion 41 and the second movable contact portion 42 from the first magnet portion 51 toward the fourth magnet portion 54 (that is, FIG. 7). ) In the A2 direction that intersects the first flat surface 511 and the fourth flat surface 541. Due to the magnetic flux in the A2 direction, Lorentz force acts on the movable contact 40 in the F3 direction of FIG.

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

  In the electromagnetic relay 1, each of the second magnet portion 52 and the third magnet portion 53 is disposed symmetrically with respect to the center line CL <b> 2 of the movable contact 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, each of the second magnet portion 52 and the third magnet portion 54 has center lines 522 and 532 that extend in the short direction when viewed from the approaching / separating direction, and the center of the movable contact 40. You may arrange | position so that it may be located in the 1st magnet part 51 side with respect to line CL2.

  As shown in FIG. 10, the electromagnetic relay 1 further includes an arc shield part 70 that is disposed inside the housing part 24 with a space in the direction perpendicular to the contact / separation direction with respect to the movable contact 40. May be. The arc shield part 70 is made of an insulating resin.

  Thus, by providing the arc shield part 70, for example, the magnet holder 25 is melted by the heat of the arc, or the magnetic parts 51, 52, 53, 54 that are permanent magnets are prevented from being deteriorated. Can do.

  As shown in FIG. 10, the arc shield part 70 is disposed between the magnet parts 51, 52, 53, 54 inside the housing part 24 and the magnet holder 25 to contact the movable contact 40. You may arrange | position so that it may surround around a separation direction. Further, although not shown in the figure, the arc shield part 70 includes the fixed contact parts 33 and 34 corresponding to the movable contact parts 41 and 42 by the magnet parts 51, 52, 53, and 54 inside the housing part 24. It may be arranged only between each magnet part 51, 52, 53, 54 and the magnet holder 25 on the F1 direction side where an arc generated between the two 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 unit 51, the second magnet unit 52, the third magnet unit 53, and the fourth magnet unit 54 may be configured with a permanent magnet. And at least any one of the 1st magnet part 51, the 2nd magnet part 52, the 3rd magnet part 53, and the 4th magnet part 54 may be constituted by an electromagnet.

  For example, as shown in FIG. 11, the 1st magnet part 51 may be comprised with an electromagnet, and the 2nd-4th magnet parts 52, 53, and 54 may be comprised with a permanent magnet. In FIG. 11, an electric current is supplied to the electromagnet constituting the first magnet unit 51 so that the polarity of the end portion on the movable contact 40 side becomes N pole. Moreover, as shown in FIG. 12, the 1st magnet part 51 and the 4th magnet part 54 may be comprised with an electromagnet, and the 2nd magnet part 52 and the 3rd magnet part 53 may be comprised with a permanent magnet. In FIG. 12, an electric current is supplied to the electromagnet constituting the first magnet unit 51 so that the polarity of the end on the movable contact 40 side becomes N pole, and the electromagnet constituting the fourth magnet unit 54 is moved to the movable contact. Current is supplied so that the polarity at the end on the child 40 side is the S pole.

  11 and 12, the case where there are four magnet parts has been described, but the same applies to the case where there are three magnet parts. That is, in the electromagnetic relay 1 shown in FIGS. 3 and 4, at least one of the first magnet unit 51, the second magnet unit 52, and the third magnet unit 53 may be configured with a permanent magnet, At least one of the first magnet unit 51, the second magnet unit 52, and the third magnet unit 53 may be composed of an electromagnet.

  Thus, since at least any of each magnet part 51, 52, 53, 54 can be constituted by a permanent magnet, and at least any of each magnet part 51, 52, 53, 54 can be constituted by an electromagnet, The degree of freedom in designing the electromagnetic relay 1 can be increased.

  As shown in FIGS. 13-18, the magnetic body 80 which further connects at least any one of the 1st magnet part 51, the 2nd magnet part 52, the 3rd magnet part 53, and the 4th magnet part 54 is further provided. May be. The magnetic body 80 is made of iron, for example.

  For example, in FIG. 13, the magnetic body 80 has a plate shape and is provided so as to surround all the movable contacts 40 around the contact / separation direction by connecting all the magnet parts 51, 52, 53, 54. Yes. Further, in FIG. 14, the magnetic body 80 has a plate shape and connects the second to fourth magnet portions 52, 53, and 54 so as to surround a part of the movable contact 40 around the contact / separation direction. Is provided.

  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 contact 40 around the contact / separation direction. And a second magnetic plate 82 connecting the first magnet part 51 and the fourth magnet part 54. FIG. 16 is a plan view seen from the direction of arrow XVI in FIG.

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

  In addition, although FIGS. 13-18 demonstrated the case where there were four magnet parts, it is the same also when there are three magnet parts. That is, the electromagnetic relay 1 shown in FIGS. 3 and 4 further includes a magnetic body 80 that connects at least two of the first magnet unit 51, the second magnet unit 52, and the third magnet unit 53. Good.

  As described above, by providing the magnetic body 80 that connects at least any two of the magnet portions 51, 52, 53, and 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 with respect to the first fixed contact portion 33, and the second movable contact portion 42 contacts or opens with respect to the second fixed contact portion 34. The arc generated at the time of separation is generated in the region of the contact case 20 attracted by the first magnet unit 51, the second magnet unit 52, the third magnet unit 53, and the fourth magnet unit 54. And a through-hole 90 communicating with the outside of the contact case 20 may be provided.

  In FIG. 19, the end of the first magnet unit 51 on the movable contact 40 side is the polarity of the end of each of the second magnet unit 52 and the third magnet unit 53 on the movable contact 40 side (ie, S pole). Have different polarities (ie, N poles), and current flows along the direction C 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 Is generated 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 housing 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 of the first magnet unit 51 on the movable contact 40 side is the polarity of the end of each of the second magnet unit 52 and the third magnet unit 53 on the movable contact 40 side (ie, S pole). 5 have opposite polarities (ie, N poles), and are in a direction opposite to the direction C in FIG. 5 (ie, from the second fixed terminal 32 to the first fixed terminal 31 through the movable contact 40). 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 Is generated 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.

  19 and 20, the case where there are four magnet parts has been described, but the same applies to the case where there are three magnet parts. That is, in the electromagnetic relay 1 shown in FIGS. 3 and 4, an arc generated when each movable contact portion 41, 42 contacts or separates from the corresponding fixed contact portion 33, 34 is generated in the first magnet portion 51. A through hole 90 communicating 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. .

  Thus, the arc generated when each movable contact portion 41, 42 contacts or separates from the corresponding fixed contact portion 33, 34 is attracted by each magnet portion 51, 52, 53, 54. By providing a through hole 90 communicating with the inside of the contact case 20 and the outside of the contact case 20 in the region of the case 20, the gas generated due to the generated arc is transferred from the accommodating portion 24 to the outside of the contact case 20. It flows toward. By this gas flow, the arc can be easily stretched and extinguished easily.

  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, so that the movable contact 40 The movable contact portions 41 and 42 are configured to be separated from the corresponding fixed contact portions 33 and 34 when the child 40 is separated from the first fixed terminal 31 and the second fixed terminal 32. Not exclusively. For example, as shown in FIG. 21, the electromagnetic relay 1 includes fixed contact portions to which the movable contact portions 41 and 42 correspond when the movable contact 40 is separated from the first fixed terminal 31 and the second fixed terminal 32. When the movable contact 40 comes into contact with the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41 and 42 are separated from the corresponding fixed contact portions 33 and 34. You may comprise. That is, the electromagnetic drive unit 60 is disposed outside the contact case 20 and on the opening direction side where the movable contact portions 41 and 42 are separated from the corresponding fixed contact portions 33 and 34 with respect to the contact case 20. Not only when the contact parts 41 and 42 are arranged on the side opposite to the electromagnetic drive part 60 side of the movable contact 40, the electromagnetic drive part 60 is movable outside the contact case 20 and with respect to the contact case 20. The contact portions 41 and 42 may be arranged on the contact direction side in contact with the corresponding fixed contact portions 33 and 34, and the movable contact portions 41 and 42 may be arranged on the electromagnetic drive unit 60 side of the movable contact 40.

  As mentioned above, although various embodiment in this invention was described in detail with reference to drawings, finally the various aspect of this invention is demonstrated.

The electromagnetic relay according to the first aspect of the present invention is:
A first fixed terminal and a second fixed terminal, which are arranged electrically independent from each other and have a first fixed contact portion and a second fixed contact portion, respectively;
The first movable contact portion and the second movable contact portion are respectively opposed to the first fixed contact portion and the second fixed contact portion, and each of the first movable contact portion and the second movable contact portion is the first movable contact portion. A movable contact disposed so as to be movable in a contact / separation direction that contacts or separates from one fixed contact portion and the second fixed contact portion;
A first magnet portion disposed on one side of a direction intersecting an arrangement direction of the first movable contact portion and the second movable contact portion of the movable contact, as viewed from the contact / separation direction;
A second magnet part and a third magnet part, which are respectively disposed on both sides of the movable contact in the arrangement direction as viewed from the contact / separation direction, and whose end parts on the movable contact side have the same polarity. And
The end of the first magnet portion on the movable contact side has a polarity different from the polarities of the end portions 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 part on the movable contact side of the first magnet part is an N pole, and the end parts on the movable contact side of the second magnet part and the third magnet part are S poles. 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 a direction crossing the arrangement direction. As a result, an arc generated between each movable contact portion and the corresponding fixed contact portion due to the magnetic flux flowing between the first magnet portion, the second magnet portion, and the third magnet portion is a space around the movable contact. On the other hand, the contact pressure between each movable contact portion and the corresponding fixed contact portion can be increased by the magnetic flux flowing in the direction intersecting the arrangement direction from the first magnet 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 performance of interrupting the arc generated between each movable contact portion and the corresponding fixed contact portion.

The electromagnetic relay of the second aspect of the present invention is
A fourth magnet portion disposed on the other side of the direction intersecting the arrangement direction of the first movable contact portion and the second movable contact portion of the movable contact as viewed from the contact / separation direction;
The end of the fourth magnet portion on the movable contact side has a polarity different from the polarity of the end 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 more reliably increased. Can do.

The electromagnetic relay of 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 contact 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 unit in the contact / separation direction with respect to the movable contact is different from the position of the fourth magnet unit in the contact / separation direction with respect to the movable contact. 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 of the fourth aspect of the present invention is
The first magnet portion is disposed between the first movable contact portion and the second movable contact portion.

  According to the electromagnetic relay of the fourth aspect, since the magnetic flux in the direction crossing the arrangement direction flows between the first movable contact portion and the second movable contact portion, between each movable contact portion and the corresponding fixed contact portion. It is possible to reliably increase the contact pressure between each movable contact portion and the corresponding fixed contact portion while reliably extending the generated arc in the space around the movable contact. That is, the reliability of the contact between each movable contact portion and the corresponding fixed contact portion is more reliably increased while the performance of interrupting the arc generated between each movable contact portion and the corresponding fixed contact portion is more reliably improved. Can be increased.

The electromagnetic relay of the fifth aspect of the present invention is
Each of the second magnet portion and the third magnet portion is disposed 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.

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

The electromagnetic relay of the sixth aspect of the present invention is
The first magnet part has a first flat surface at the end on the movable contact side, the second magnet part has a second flat surface at the end on the movable contact side, 3 magnet parts have the 3rd flat surface in the end by the side of the movable contact,
The first flat surface is arranged in parallel to a 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 fixed contact corresponding to each movable contact portion while the arc generated between each movable contact portion and the corresponding fixed contact portion is reliably stretched by the space around the movable contact. The contact pressure between the parts can be increased more reliably. That is, the reliability of the contact between each movable contact portion and the corresponding fixed contact portion is more reliably increased while the performance of interrupting the arc generated between each movable contact portion and the corresponding fixed contact portion is more reliably improved. Can be increased.

The electromagnetic relay of the seventh aspect of the present invention is
The movable contactor further includes an arc shield portion disposed at an interval in a direction orthogonal to the contact / separation direction.

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

The electromagnetic relay of the eighth aspect of the present invention is
A magnetic body that connects at least any two of the first magnet unit, the second magnet unit, and the third magnet unit 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 of the ninth aspect of the present invention is
At least one of the first magnet unit, the second magnet unit, and the third magnet unit is formed 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 of the tenth aspect of the present invention is
At least one of the first magnet unit, the second magnet unit, and the third magnet unit is formed 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 of the eleventh aspect of the present invention is
A box-shaped insulating contact case in which the first fixed contact portion and the second fixed contact portion and the movable contact are disposed;
An arc generated when the first movable contact portion contacts or separates from the first fixed contact portion and the second movable contact portion contacts or separates from the second fixed contact portion, A through hole communicating with the inside of the contact case and the outside of the contact case is provided in a region of the contact case attracted by the first magnet unit, the second magnet unit, and the third magnet unit. Yes.

  According to the electromagnetic relay of the eleventh aspect, the arc generated when each movable contact portion comes into contact with or breaks away from the corresponding fixed contact portion is attracted to the contact case region attracted by each magnet portion. By providing a through hole that communicates with the inside of the housing and the outside of the contact case, gas generated due to the generated arc flows from the housing portion toward the outside of the contact case. By this gas flow, the arc can be easily stretched and extinguished easily.

  In addition, it can be made to show the effect which each has by combining arbitrary embodiment or modification of the said various embodiment or modification suitably. In addition, combinations of the embodiments, combinations of the examples, or combinations of the embodiments and examples are possible, and combinations of features in different embodiments or examples are also possible.

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

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 10 Housing 11 Case 111 Bottom wall part 12 Cover 121 Bottom wall part 13 Terminal hole 20 Contact case 21 Ceramic plate 22 Flange part 23 First yoke 231 Through hole 24 Housing part 25 Magnet holder 251 Through hole 31 First fixed terminal 32 2nd fixed terminal 33 1st fixed contact part 34 2nd fixed contact part 35 movable shaft 351 collar part 352 coil spring holding part 36 coil spring 40 movable contact 41 first movable contact part 42 second movable contact part 51 1st Magnet portion 511 Flat surface 52 Second magnet portion 521 Flat surface 53 Third magnet portion 531 Flat surface 54 Fourth magnet portion 541 Flat surface 60 Electromagnetic drive portion 61 Electromagnet portion 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 part 80 Magnetic body 81 First magnet Plate 82 the second magnetic plate 83 third magnetic plate 84 fourth magnetic plate 90 through holes CL1~CL3 centerline F1~F4 direction A~C direction P intersection 100 space

Claims (11)

A first fixed terminal and a second fixed terminal, which are arranged electrically independent from each other and have a first fixed contact portion and a second fixed contact portion, respectively;
The first movable contact portion and the second movable contact portion are respectively opposed to the first fixed contact portion and the second fixed contact portion, and each of the first movable contact portion and the second movable contact portion is the first movable contact portion. A movable contact disposed so as to be movable in a contact / separation direction that contacts or separates from one fixed contact portion and the second fixed contact portion;
A first magnet portion disposed on one side of a direction intersecting an arrangement direction of the first movable contact portion and the second movable contact portion of the movable contact, as viewed from the contact / separation direction;
A second magnet part and a third magnet part, which are respectively disposed on both sides of the movable contact in the arrangement direction as viewed from the contact / separation direction, and whose end parts on the movable contact side have the same polarity. And
The end portion on the movable contact side of the first magnet portion has a polarity different from the polarity of the end portion on the movable contact side of the second magnet portion and the third magnet portion, Electromagnetic relay. A fourth magnet portion disposed on the other side of the direction intersecting the arrangement direction of the first movable contact portion and the second movable contact portion of the movable contact as viewed from the contact / separation direction;
2. The electromagnetic relay according to claim 1, wherein an end of the fourth magnet portion on the movable contact side has a polarity different from a polarity of an end of the first magnet portion on the movable contact side. .   The electromagnetic according to claim 2, wherein a position of the first magnet portion in the contact / separation direction with respect to the movable contact and a position of the fourth magnet portion in the contact / separation direction with respect to the movable contact are different from each other. relay.   4. The electromagnetic relay according to claim 1, wherein the first magnet part is disposed between the first movable contact part and the second movable contact part.   Each of the said 2nd magnet part and the said 3rd magnet part is arrange | positioned symmetrically with respect to the centerline of the said movable contact extended in the direction orthogonal to the said arrangement direction seeing from the said contact / separation direction. Item 5. The electromagnetic relay according to any one of items 1 to 4. The first magnet part has a first flat surface at the end on the movable contact side, the second magnet part has a second flat surface at the end on the movable contact side, 3 magnet parts have the 3rd flat surface in the end by the side of the movable contact,
The first flat surface is arranged in parallel to a 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. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is disposed so as to be orthogonal to the virtual straight line.   The electromagnetic relay according to any one of claims 1 to 6, further comprising an arc shield part disposed at an interval in a direction orthogonal to the contact / separation direction with respect to the movable contact.   The electromagnetic relay according to claim 1, further comprising a magnetic body that connects at least any two of the first magnet unit, the second magnet unit, and the third magnet unit.   The electromagnetic relay according to any one of claims 1 to 8, wherein at least one of the first magnet unit, the second magnet unit, and the third magnet unit is formed of a permanent magnet.   The electromagnetic relay according to any one of claims 1 to 8, wherein at least one of the first magnet unit, the second magnet unit, and the third magnet unit is configured by an electromagnet. A box-shaped insulating contact case in which the first fixed contact portion and the second fixed contact portion and the movable contact are disposed;
An arc generated when the first movable contact portion contacts or separates from the first fixed contact portion and the second movable contact portion contacts or separates from the second fixed contact portion, A through hole communicating with the inside of the contact case and the outside of the contact case is provided in a region of the contact case attracted by the first magnet unit, the second magnet unit, and the third magnet unit. The electromagnetic relay according to claim 1.

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