WO2019031228A1 - Electromagnetic relay - Google Patents

Abstract

An electromagnetic relay comprises: a first fixed terminal and a second fixed terminal respectively having a first fixed contact part and a second fixed contact part; a moveable contact having a first movable contact part and a second movable contact part; a first magnet part arranged to one side in the direction intersecting the direction in which the movable contacts are arrayed as seen from the contacting-separating direction; and a second magnet part and a third magnet part arranged respectively at both sides of the movable contact in the array direction, and in which the edge parts on the movable contact side have the same polarity to each other. The edge part of the first magnet part on the movable contact side has a mutually different polarity from the polarity of the edge parts of the second magnet part and the third magnet part on the movable contact side.

Description

Electromagnetic relay

The present disclosure 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 disposed so as to be contactable and detachable with respect to each fixed contact portion, and each movable contact portion corresponds to each other. An electromagnetic relay is disclosed which comprises a movable plate movable in a direction of contact and separation with respect to a fixed contact portion. In the electromagnetic relay, a first arc extinguishing permanent magnet and a second arc extinguishing permanent magnet are provided on both sides of the movable plate in the lateral direction of the movable plate as viewed from the contact / separation 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.

JP, 2016-12504, A

In the electromagnetic relay, the first arc extinguishing permanent magnet and the second arc extinguishing permanent magnet are arranged such that the magnetic pole of the opposing end face becomes the N pole, and the third arc extinguishing permanent magnet and the fourth arc extinguishing permanent magnet The arc extinguishing permanent magnet is disposed such that the magnetic pole of the opposing end face is the S pole. 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 extinguishing permanent magnet and the fourth arc extinguishing permanent magnet. Therefore, while the arc generated between the movable contact portions and the corresponding fixed contact portions can be extended to the space around the movable plate to enhance the arc blocking performance, the movable contact portions and the corresponding fixed contact portions It may not be possible to increase the contact pressure between each movable contact portion and the corresponding fixed contact portion by increasing the contact pressure between them. For example, if the contact pressure between each movable contact portion and the corresponding fixed contact portion is insufficient, each movable contact portion may be separated from the corresponding fixed contact portion to cause smoke or ignition, and to avoid this The size of the electromagnetic relay needs to be increased.

Therefore, the present disclosure is to improve the contact reliability between each movable contact portion and the corresponding fixed contact portion while enhancing the blocking 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 capable of

The electromagnetic relay according to one aspect of the present disclosure is
A first fixed terminal and a second fixed terminal which are arranged independently of each other and respectively have a first fixed contact portion and a second fixed contact portion;
It has a first movable contact portion and a second movable contact portion respectively facing the first fixed contact portion and the second fixed contact portion, each of the first movable contact portion and the second movable contact portion being the first movable contact portion and the second movable contact portion. (1) A movable contact member movably disposed in an approaching / removing direction in which the fixed contact portion and the second fixed contact portion contact or are separated.
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 when viewed from the contact / separation direction, and the ends on the movable contact side have the same polarity. Equipped with
The end on the movable contact side of the first magnet unit has a polarity different from the polarity of the end on the movable contact side of the second magnet unit and the third magnet unit.

According to the electromagnetic relay of the above aspect, the end on the movable contact side of the first magnet unit has a polarity different from the polarity of the end on the movable contact side of each of the second magnet unit and the third magnet unit. have. Therefore, for example, when the end on the movable contact side of the first magnet unit is the N pole, and the end on the movable contact side of the second magnet unit and the third magnet unit is the S pole, for example, the first magnet unit The magnetic flux flows from the first magnet portion to the second magnet portion and the third magnet portion while the magnetic flux flows from the first magnet portion in the direction crossing the arrangement direction. As a result, the magnetic flux flowing between the first magnet portion and the second and third magnet portions causes an arc generated between each movable contact portion and the corresponding fixed contact portion to be a space around the movable contact. While the magnetic flux flowing in the direction crossing the arrangement direction from the first magnet portion intersects the current flowing in the movable contact, the Lorentz force generated between each movable contact portion and the corresponding fixed contact portion The contact pressure between them can be increased. That is, the contact reliability between each movable contact portion and the corresponding fixed contact portion can be improved while enhancing the interrupting performance of the arc generated between each movable contact portion and the corresponding fixed contact portion.

1 is a perspective view of an electromagnetic relay according to an embodiment of the present disclosure. Sectional drawing along the II-II line of FIG. The top view in the state where the cover and ceramic plate of the electromagnetic relay of FIG. 1 were removed. FIG. 2 is a schematic plan view for explaining the arrangement of magnet parts of the electromagnetic relay of FIG. 1; The front schematic diagram for demonstrating arrangement | positioning of the magnet part of the electromagnetic relay of FIG. The planar 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 planar schematic diagram for demonstrating the 3rd modification of the electromagnetic relay of FIG. The planar 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 planar schematic diagram for demonstrating the 6th modification of the electromagnetic relay of FIG. The planar schematic diagram for demonstrating the 7th modification of the electromagnetic relay of FIG. The planar 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 planar 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 planar schematic diagram for demonstrating the 10th modification of the electromagnetic relay of FIG. The planar 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, an embodiment of the present disclosure will be described according to the attached drawings. In the following description, terms that indicate specific directions or positions (for example, terms including “upper”, “lower”, “right”, and “left”) are used when necessary, but use of those terms Is for facilitating the understanding of the disclosure with reference to the drawings, and the technical scope of the present disclosure is not limited by the meanings of the terms. In addition, the following description is merely exemplary in nature and is not intended to limit the present disclosure, its application, or its application. Further, the drawings are schematic, and the proportions of the respective dimensions do not necessarily match the actual ones.

As shown in FIGS. 1 to 3, the electromagnetic relay 1 according to an embodiment of the present disclosure includes a first fixed terminal 31 and a second fixed terminal 32 which are disposed electrically independently of each other, and the respective fixed terminals 31, A movable contact 40 disposed movably in a direction approaching or separating from 32 and first to third disposed around the movable contact 40 in a direction intersecting the moving direction of the movable contact 40 The magnet unit 51, 52, 53 (only the first magnet unit 51 is shown in FIG. 3) is provided.

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 a first fixed terminal 31 and a second fixed terminal 31 are provided. The fixed terminals 32 are respectively fixed to the contact case 20, the movable contact is 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 33 and a second fixed contact 34 inside the contact case 20. Further, the movable contact 40 has a first movable contact portion 41 and a second movable contact portion 42 respectively facing the first fixed contact portion 33 and the second fixed contact portion 34.

The electromagnetic relay 1 is symmetrical with respect to the center line CL1 of the movable contact 40, passing through the centers of the first fixed terminal 31 and the second fixed terminal 32, excluding the housing 10, in a cross sectional view shown in FIG. Provided in

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

The contact case 20 has a substantially rectangular parallelepiped shape, and as shown in FIG. 2, is constituted by the ceramic plate 21, the flange portion 22 and the first yoke 23, and the housing portion 24 is formed therein.

The ceramic plate 21 is disposed inside the housing 10 adjacent to the bottom wall 121 of the cover 12 and extends along the bottom wall 121. The first fixed terminal 31 and the second fixed terminal 32 are fixed to the ceramic plate 21. The flange portion 22 is an inner portion of the cover 12 toward the bottom wall portion 111 of the case 11 facing the open surface of the case 11 from the end of the open surface side (that is, the lower side in FIG. 2) of the cover 12 of the ceramic plate 21. Extends to the inside of the case 11. Further, the first yoke 23 is disposed substantially parallel to the ceramic plate 21 inside the case 11, and an 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 communicating with the housing portion 24 and the outside of the contact case 20 along the center line CL1 is provided in a substantially central portion of the first yoke 23.

Further, an insulating magnet holder 25 for holding the first to third magnet portions 51, 52, 53 is provided in 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 of the ceramic plate 21 farther from the center line CL 1 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 communicating with the housing portion 24 and the outside of the contact case 20 along the center line CL1 is provided in a substantially central portion of the magnet holder 25. In the through hole 251, a substantially cylindrical rod-like movable shaft 35 is disposed movably along the center line CL1.

The movable shaft 35 extends from the housing portion 24 to the outside of the contact case 20, the movable contact 40 is connected to the end on the housing portion 24 side, and the electromagnetic wave described later on the outer end of the contact case 20 The movable iron piece 65 of the drive unit 60 is connected. Further, at an intermediate portion of the accommodation portion 24 of the movable shaft 35, a collar 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 to be able to contact 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 separating from the corresponding fixed contact portions 33 and 34. And restricts the moving range of the movable shaft 35 and hence the movable contact 40. In addition, a coil spring 36 that expands 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 locked to the collar 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 so as to be electrically independent of each other. Each of the first fixed terminal 31 and the second fixed terminal 32 is disposed to be spaced apart from each other along the arrangement direction (that is, the left-right direction in FIG. 2), There is.

As shown in FIG. 2, the first fixed contact 33 and the second fixed contact 34 are provided on the end face of the first fixed terminal 31 and the second fixed terminal 32 on the side of the housing 24. 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.

The movable contact 40 has, for example, a substantially rectangular plate shape as shown in FIG. As shown in FIG. 2, the movable contact 40 has a first movable contact portion 41 and a second movable contact portion 42 respectively facing the first fixed contact portion 33 and the second fixed contact portion 34. A movable shaft 35 movable along the center line CL1 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 the first fixed contact portion 33 and the second fixed contact portion 34 along the center line CL1, and the movable contact 40 The first movable contact portion 41 and the second movable contact portion 42 are disposed so as to be movable in the contacting / separating direction in which each of the first movable contact portion 41 and the second fixed contact portion 34 contacts or separates. . 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 units 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 a movable contact as viewed from the contact / separation direction in which each movable contact unit 41, 42 contacts or separates from the corresponding fixed contact unit 33, 34 (that is, the penetrating direction in FIG. 3). The first movable contact portion 41 and the second movable contact portion 42 of the element 40 are disposed on one side in a direction intersecting (for example, orthogonal to) the arrangement direction (that is, the left and right direction of FIG. It is done. Specifically, the first magnet portion 51 has a first flat surface 511 at an end portion 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 disposed parallel to a center line CL2 of the movable contact 40, which is an imaginary straight line extending in the arrangement direction of the second movable contact portion 42 (that is, the 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 these second flat surfaces 521 and 53 The third flat surface 531 is disposed 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 There is.

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

Further, the first magnet portion 51 is disposed between the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40. Specifically, the first magnet portions 51 are disposed symmetrically with respect to a 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 unit 52 and the third magnet unit 53 has 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, as viewed from the contact / separation direction. It is arranged symmetrically with respect to CL3.

The electromagnetic drive unit 60, as shown in FIG. 2, includes an electromagnet unit 61 having a through hole 611 in which the movable shaft 35 is disposed extending substantially along the center line CL1, a first yoke 23, and a first The second yoke 64 surrounding the movable shaft 35 together with the yoke 23, the movable iron piece 65 disposed in the through hole 611 of the electromagnetic unit 61 and connected to the movable shaft 35, and the through hole 611 of the electromagnetic unit 61 A fixed iron piece 66 is disposed and 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 electromagnet unit 61.

The electromagnet unit 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. There is. The second yoke 64 has, for example, a substantially U-shape in a cross-sectional view shown in FIG. The fixed iron piece 66 is located between the first yoke 23 and the magnet holder 25 in the direction in which one end thereof intersects with the center line CL1. At a substantially central portion of the fixed iron piece 66, a through hole 661 extending along the center line CL1 is provided. The movable shaft 35 is disposed in the through hole 661 so as to be movable along the center line CL1 with a gap therebetween. 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, in the state in which the movable contact portions 41 and 42 correspond to the corresponding fixed contact portions 33 and 34, respectively), when current is supplied to the coil 63 of the electromagnet portion 61, the movable portion A magnetic attraction is generated between the movable iron piece 65 and the fixed iron piece 66 connected to the shaft 35. The movable iron piece 65 is magnetically attracted to the fixed iron piece 66 against the elastic force of the return spring 67 by the magnetic attraction force, and the movable shaft 35 is accommodated from the outside of the contact case 20 along the contact and separation direction. Move towards 24. As a result, the movable contact 40 moves in the approaching and separating direction toward the first fixed terminal 31 and the second fixed terminal 32, and the movable contact portions 41 and 42 correspond to the corresponding fixed contact portions 33 and 34. In contact, the electromagnetic relay 1 is brought into operation from the return state.

When the supply of 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 attracts the movable iron piece 65 disappears, and the elastic force of the return spring 67 causes the movable member to move. 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 a direction away from the first fixed terminal 31 and the second fixed terminal 32 along the contact / separation direction, and the movable contact portions 41, 42 open from the corresponding fixed contact portions 33, 34. Separately, the electromagnetic relay 1 returns from the operating state.

That is, the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40 move relative to the first fixed contact portion 33 and the second fixed contact portion 34 by the movement of the movable shaft 35 along the contact / separation direction. Contact or break away.

In the electromagnetic relay 1, the end of the first magnet unit 51 on the movable contact 40 side has the polarity of the end of the second magnet unit 52 and the third magnet unit 53 on the movable contact 40 side (that is, S The poles have mutually different polarities (that is, 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. In addition, magnetic flux flows from the first magnet unit 51 through the first movable contact unit 41 and along the direction B1 toward the second magnet unit 52, and from the first magnet unit 51 through the second movable contact unit 42. A magnetic flux flows along the B2 direction toward the third magnet unit 53.

At this time, as shown in FIG. 5, it is assumed that the current flows along the C direction from the first fixed terminal 31 through the movable contact 40 to 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, Lorentz force acts on the movable contact 40 in the F3 direction of FIG. 5 by the magnetic flux in the A direction. Thereby, the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 is a space around the movable contact 40 (in this case, as shown in FIG. The movable contact 40 can be extinguished by extending it to the space 100 opposite to the first magnet 51 with respect to the intersection point P of the two center lines CL2 and CL3 of the movable contact 40, The contact pressure between 42 and the corresponding fixed contact 33, 34 can be increased. That is, the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 are enhanced while the blocking performance of the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 is enhanced. The contact reliability between can be improved.

Further, the first magnet portion 51 is disposed between the first movable contact portion 41 and the second movable contact portion 42. As a result, the magnetic flux in the A direction crossing the arrangement direction flows between the first movable contact portion 41 and the second movable contact portion 42, so that the fixed contact portions 33, 34 corresponding to the movable contact portions 41, 42 and The contact pressure between each of the movable contact portions 41 and 42 and the corresponding fixed contact portion 33 or 34 can be more reliably increased while the arc generated between the two is reliably extended to the space around the movable contact 40 it can. That is, the fixed contact portions 33 corresponding to the movable contact portions 41 and 42, while reliably enhancing the interrupting performance of the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34, The contact reliability with the V. 34 can be more reliably enhanced.

In addition, each of the second magnet unit 52 and the third magnet unit 53 is arranged symmetrically with respect to a center line CL3 of the movable contact 40 extending in a direction orthogonal to the arrangement direction, as viewed from the contact / separation direction. Furthermore, 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. 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 disposed parallel to the center line CL2 of the movable contact 40, which is an imaginary 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 When viewed from the contact / separation direction, the movable contact 40 is disposed to be orthogonal to the center line CL2. Thereby, the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 is reliably extended by the space around the movable contact 40 while corresponding to the movable contact portions 41 and 42. The contact pressure with the fixed contact portions 33 and 34 can be more reliably increased. That is, the fixed contact portions 33 corresponding to the movable contact portions 41 and 42, while reliably enhancing the interrupting performance of the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34, The contact reliability with the V. 34 can be more reliably enhanced.

In addition, in the said electromagnetic relay 1, although the 1st magnet part 51 is arrange | positioned between the 1st movable contact part 41 and the 2nd movable contact part 42, it does not restrict to this. The second magnet unit 52 and the third magnet unit 53 are 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, as viewed from the contact / separation direction. Although arranged symmetrically with respect to CL3, the present invention is not limited to this. Furthermore, the first flat surface 511 of the first magnet portion 51 is disposed 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 Although they are arranged 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 portion 51 is disposed 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 viewed in the arrangement direction as viewed from the contact / separation direction. As long as they are disposed on both sides of the movable contact 40, they can be disposed at arbitrary positions according to the design of the electromagnetic relay 1 or the like.

As shown in FIG. 6, the electromagnetic relay 1 is an arrangement of the first movable contact portion 41 and the second movable contact portion 42 of the movable contact 40 as viewed from the contact / separation direction (that is, the paper surface penetrating direction in FIG. 6). It may further include a fourth magnet unit 54 disposed on the other side of the direction intersecting the direction (ie, the upper side in FIG. 6 with respect to the movable contact 40).

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

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

Thus, the fourth magnet portion 54 disposed on the other side of 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. Further, the density of the magnetic flux flowing in the direction orthogonal to the arrangement direction can be increased. 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 more reliably increased.

Further, as shown in FIG. 7, the position of the first magnet unit 51 in the direction of contact and separation with the movable contact 40 (that is, the vertical direction in FIG. 7) and the direction of contact of the fourth magnet unit 54 with the movable contact 40 The positions of the first and second magnetic portions 51 and 52 may be identical to each other, as shown in FIGS. And the position of the fourth magnet unit 54 in the direction of contact and separation with respect to the movable contact 40 may be different from each other.

For example, the magnetism of the end of the first magnet unit 51 on the movable contact 40 side is the N pole, and the magnetism of the end of the fourth magnet unit 54 on the movable contact 40 side is the N pole, and 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. In this case, as shown in FIG. 7, 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 to the fourth magnet portion 54 (ie, FIG. 7) The magnetic flux flows in the A1 direction substantially orthogonal to the first flat surface 511 and the fourth flat surface 541). Lorentz force acts on the movable contact 40 in the F3 direction of FIG. 5 by the magnetic flux in the A1 direction.

On the other hand, the magnetism of the end on the movable contact 40 side of the first magnet unit 51 is N pole, and the magnetism of the end on the movable contact 40 side of the fourth magnet unit 54 is N 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 different from each other. 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 to the fourth magnet portion 54 (ie, FIG. 7) The magnetic flux flows in the A2 direction crossing the first flat surface 511 and the fourth flat surface 541). A Lorentz force acts on the movable contact 40 in the F3 direction of FIG. 8 by the magnetic flux in the A2 direction.

As described above, even when the position of the first magnet unit 51 in the contact / separation direction with respect to the movable contact 40 and the position of the fourth magnet unit 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 and 42 and the corresponding fixed contact portions 33 and 34 can be increased. That is, the degree of freedom in design of the electromagnetic relay 1 can be increased.

Further, in the electromagnetic relay 1, each of the second magnet unit 52 and the third magnet unit 53 is disposed symmetrically with respect to the center line CL2 of the movable contact 40 extending in the arrangement direction, as viewed from the contact / separation direction. But it is not limited to this. For example, as shown in FIG. 6, center lines 522 and 532 extending in the short direction of each of the second magnet unit 52 and the third magnet unit 54 are the center of the movable contact 40 when viewed from the contact / separation direction. You may be arrange | positioned 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 portion 70 disposed at an interval in a direction perpendicular to the contact / separation direction with respect to the movable contact 40 inside the housing portion 24. May be The arc shield unit 70 is made of an insulating resin.

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

As shown in FIG. 10, the arc shield unit 70 is disposed between the magnet units 51, 52, 53, 54 and the magnet holder 25 inside the housing unit 24, and contacts the movable contactor 40. It may be disposed so as to surround around the separating direction. Further, although the arc shield unit 70 is not shown, fixed contact units 33 and 34 corresponding to the movable contact units 41 and 42 by the respective magnet units 51, 52, 53 and 54 inside the housing unit 24 and And the magnet holder 25 may be disposed only between the magnet units 51, 52, 53, 54 and the magnet holder 25 on the side of the F1 direction in which the arc generated between them is induced. 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 made of a permanent magnet. Alternatively, 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 by an electromagnet.

For example, as shown in FIG. 11, the first magnet unit 51 may be an electromagnet, and the second to fourth magnet units 52, 53, 54 may be permanent magnets. In FIG. 11, a current is supplied to the electromagnet of the first magnet unit 51 such that the polarity of the end on the movable contact 40 side is the N pole. Further, as shown in FIG. 12, the first magnet unit 51 and the fourth magnet unit 54 may be configured by electromagnets, and the second magnet unit 52 and the third magnet unit 53 may be configured by permanent magnets. In FIG. 12, a current is supplied to the electromagnet constituting the first magnet unit 51 such that the polarity of the end on the movable contact 40 side becomes the N pole, and the electromagnet constituting the fourth magnet unit 54 is 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 demonstrated the case where four magnet parts were, the same may be said of 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 by 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 configured by an electromagnet.

As described above, at least one of the magnet units 51, 52, 53, 54 can be configured by a permanent magnet, and at least any one of the magnet units 51, 52, 53, 54 can be configured by an electromagnet. The degree of freedom in the design of the electromagnetic relay 1 can be increased.

As shown in FIGS. 13 to 18, the magnetic body 80 further includes a magnetic body 80 connecting at least two of the first magnet unit 51, the second magnet unit 52, the third magnet unit 53, and the fourth magnet unit 54. May be The magnetic body 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 contact 40 in the contact / separation direction. There is. Further, in FIG. 14, the magnetic body 80 has a plate shape, and connects the second to fourth magnet portions 52, 53, 54 to surround a part of the movable contact 40 in the contact / separation direction. It is provided.

Further, in FIG. 15 and FIG. 16, the magnetic body 80 connects the second to fourth magnet portions 52, 53, 54 to surround the part of the movable contact 40 in the contact / separation direction, and the first magnetic plate 81. And a second magnetic plate 82 connecting the first magnet unit 51 and the fourth magnet unit 54. FIG. 16 is a plan view seen in the direction of arrow XVI in FIG.

Furthermore, in FIG. 17 and FIG. 18, the magnetic body 80 connects the third magnetic plate 83 connecting 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 the fourth magnetic plate 84. FIG. 18 is a plan view seen from the direction of arrow XVIII in FIG.

Although the case of four magnet units has been described with reference to FIGS. 13 to 18, the same applies to the case of three magnet units. That is, the electromagnetic relay 1 shown in FIGS. 3 and 4 further includes the magnetic body 80 connecting 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 connecting at least any two of the magnet units 51, 52, 53, 54, various magnet arrangements can be realized, so the design freedom of the electromagnetic relay 1 is enhanced. be able to.

As shown in FIGS. 19 and 20, the first movable contact portion 41 contacts or separates from the first fixed contact portion 33, and the second movable contact portion 42 contacts or opens to the second fixed contact portion 34. In the area of the contact case 20 in which an arc generated upon separation is attracted by the first magnet unit 51, the second magnet unit 52, the third magnet unit 53, and the fourth magnet unit 54, the inside of the contact case 20 A through hole 90 communicating with the outside of the contact case 20 may be provided.

In FIG. 19, the end on the movable contact 40 side of the first magnet unit 51 has the polarity (that is, the S pole) of the end on the movable contact 40 side of each of the second magnet unit 52 and the third magnet unit 53. Have different polarities (that is, N poles) from each other, and the current flows in the C direction of 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 drawn arc, for example, the magnet holder 25 made of resin 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 housing portion 24 to the outside of the contact case 20 through the through hole 90.

In FIG. 20, the end on the movable contact 40 side of the first magnet unit 51 is the polarity (that is, the S pole) of the end on the movable contact 40 side of each of the second magnet unit 52 and the third magnet unit 53. Have a polarity (ie, N pole) different from each other, and in the direction opposite to the C direction of FIG. 5 (ie, from the second fixed terminal 32 through the movable contact 40 toward the first fixed terminal 31 Current flows 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 drawn arc flows along the arrow 92 in FIG. 20 and is discharged from the housing portion 24 to the outside of the contact case 20 through the through hole 90.

In addition, although FIG. 19 and FIG. 20 demonstrated the case where four magnet parts were, the same may be said of the case where there are three magnet parts. That is, in the electromagnetic relay 1 shown in FIGS. 3 and 4, the arc generated when each movable contact portion 41, 42 contacts or breaks the corresponding fixed contact portion 33, 34 is 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 area of the contact case 20 which is attracted by the second magnet unit 52 and the third magnet unit 53. .

In this manner, the arcs generated when the movable contact portions 41, 42 contact or break with the corresponding fixed contact portions 33, 34 are contacts attracted by the respective magnet portions 51, 52, 53, 54. By providing the through hole 90 communicating 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 from the storage portion 24 to the outside of the contact case 20 Flow toward This gas flow makes it easy to stretch the arc and can be easily extinguished.

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, 42 contact the corresponding fixed contact portions 33, 34, and the movable contact 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 separates from the first fixed terminal 31 and the second fixed terminal 32. Not exclusively. 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 electromagnetic relay 1 is a fixed contact portion to which each movable contact portion 41, 42 corresponds. 33, 34 so that when the movable contact 40 approaches the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41, 42 separate from the corresponding fixed contact portions 33, 34 You may configure it. That is, the electromagnetic drive unit 60 is disposed outside the contact case 20 and on the side of the separating direction in which 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 portions 41 and 42 are disposed on the opposite side of the movable contact 40 from the electromagnetic drive portion 60 side, the electromagnetic drive portion 60 is movable with respect to the contact case 20 outside the contact case 20 The contact portions 41 and 42 may be disposed on the side of the contact direction in contact with the corresponding fixed contact portions 33 and 34, and the movable contact portions 41 and 42 may be disposed on the electromagnetic drive portion 60 side of the movable contact 40.

While the various embodiments of the present disclosure have been described in detail with reference to the drawings, various aspects of the present disclosure will be finally described. In the following description, as an example, reference numerals will be attached.

The electromagnetic relay 1 of the first aspect of the present disclosure is
A first fixed terminal 31 and a second fixed terminal 32, which are disposed independently of each other and have the first fixed contact 33 and the second fixed contact 34, respectively;
It has a first movable contact portion 41 and a second movable contact portion 42 respectively facing the first fixed contact portion 33 and the second fixed contact portion 34, and the first movable contact portion 41 and the second movable contact portion A movable contact 40 disposed so as to be movable in the approaching and separating direction in which each of the first and second fixed contact portions 33 and 34 contacts or separates from the first fixed contact portion 33 and the second fixed contact portion 34;
A first magnet portion 51 disposed on one side of a 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;
A second magnet portion 52 and a third magnet portion 52 disposed on both sides of the movable contact 40 in the arrangement direction and viewed from the contact / separation direction, and the end portions on the movable contact side have the same polarity as each other And a magnet unit 53,
The end on the movable contact side of the first magnet unit 51 has a polarity different from the polarity of the end on the movable contact side of the second magnet unit 52 and the third magnet unit 53. ing.

According to the electromagnetic relay 1 of the first aspect, for example, the end on the movable contact side of the first magnet unit 51 is the N pole, and the end on the movable contact side of the second magnet unit 52 and the third magnet unit 53 When the magnetic pole is an S pole, the magnetic flux flows from the first magnet unit 51 toward the second magnet unit 52 and the third magnet unit 53, and the magnetic flux flows from the first magnet unit 51 in the direction intersecting the arrangement direction. As a result, magnetic flux flowing between the first magnet unit 51 and the second magnet unit 52 and the third magnet unit 53 generates between the movable contact units 41 and 42 and the corresponding fixed contact units 33 and 34. While the arc can be extended to the space around the movable contact 40, the fixed contact portions 33, 34 corresponding to the movable contact portions 41, 42 by the magnetic flux flowing from the first magnet portion 51 in the direction intersecting the arrangement direction. The contact pressure between and can be increased. That is, the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 are enhanced while the blocking performance of the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 is enhanced. The contact reliability between can be improved.

The electromagnetic relay 1 of the second aspect of the present disclosure is
A fourth magnet portion 54 disposed on the other side of 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. And further
The end on the movable contact side of the fourth magnet unit 54 has a polarity different from the polarity of the end on the movable contact side of the first magnet unit 51.

According to the electromagnetic relay 1 of the second aspect, since the density of the magnetic flux flowing in the direction orthogonal to the arrangement direction can be increased, the connection between each movable contact portion 41, 42 and the corresponding fixed contact portion 33, 34 The pressure can be increased more reliably.

The electromagnetic relay 1 of the third aspect of the present disclosure is
The position of the first magnet unit 51 in the contact / separation direction with respect to the movable contact 40 and the position of the fourth magnet unit 54 in the contact / separation direction with respect to the movable contact 40 are different from each other.

According to the electromagnetic relay 1 of the third aspect, 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 mutually different. Even in this case, 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 design of the electromagnetic relay 1 can be increased.

The electromagnetic relay 1 of the fourth aspect of the present disclosure is
The first magnet portion 51 is disposed between the first movable contact portion 41 and the second movable contact portion 42.

According to the electromagnetic relay 1 of the fourth aspect, since the magnetic flux in the direction crossing the arrangement direction flows between the first movable contact portion 41 and the second movable contact portion 42, the magnetic relay 1 corresponds to each of the movable contact portions 41, 42. The contact pressure between each movable contact portion 41, 42 and the corresponding fixed contact portion 33, 34 while stretching the arc generated between the fixed contact portions 33, 34 more reliably to the space around the movable contact 40 Can be enhanced more reliably. That is, the fixed contact portions 33 corresponding to the movable contact portions 41 and 42, while reliably enhancing the interrupting performance of the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34, The contact reliability with the V. 34 can be more reliably enhanced.

The electromagnetic relay 1 of the fifth aspect of the present disclosure is
Each of the second magnet unit 52 and the third magnet unit 53 is disposed symmetrically with respect to a center line CL3 of the movable contact 40 extending in a direction orthogonal to the arrangement direction when viewed from the contact / separation direction. ing.

According to the electromagnetic relay 1 of the fifth aspect, the arcs generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 can be extended more reliably while the space around the movable contact 40 is extended. 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. That is, the fixed contact portions 33 corresponding to the movable contact portions 41 and 42, while reliably enhancing the interrupting performance of the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34, The contact reliability with the V. 34 can be more reliably enhanced.

The electromagnetic relay 1 of the sixth aspect of the present disclosure is
The first magnet unit 51 has a first flat surface 511 at an end on the movable contact side, and the second magnet unit 52 has a second flat surface 521 at an end on the movable contact side. The third magnet unit 53 has a third flat surface 531 at an end on the movable contact side,
The first flat surface 511 is disposed parallel to the virtual straight line CL2 extending in the arrangement direction when viewed from the contact and separation direction, and the second flat surface 521 and the third flat surface 531 are the contact and separation As viewed from the direction, they are arranged to be orthogonal to the virtual straight line CL2.

According to the electromagnetic relay 1 of the sixth aspect, the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34 can be extended more reliably while the space around the movable contact 40 is extended. 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. That is, the fixed contact portions 33 corresponding to the movable contact portions 41 and 42, while reliably enhancing the interrupting performance of the arc generated between the movable contact portions 41 and 42 and the corresponding fixed contact portions 33 and 34, The contact reliability with the V. 34 can be more reliably enhanced.

The electromagnetic relay 1 of the seventh aspect of the present disclosure is
The movable contact 40 further includes an arc shield portion 70 spaced apart in a direction perpendicular to the contact / separation direction.

According to the electromagnetic relay 1 of the seventh aspect, since the shield part 70 for arc is provided, for example, when each of the magnet parts 51, 52, 53 is made of a permanent magnet, the magnetic deterioration thereof can be prevented. it can.

The electromagnetic relay 1 of the eighth aspect of the present disclosure is
It further comprises a magnetic body 80 connecting at least any two of the first magnet unit 51, the second magnet unit 52, and the third magnet unit 53.

According to the electromagnetic relay 1 of the eighth aspect, it is possible to increase the degree of freedom in the design of the electromagnetic relay 1.

The electromagnetic relay 1 of the ninth aspect of the present disclosure is
At least one of the first magnet unit 51, the second magnet unit 52, and the third magnet unit 53 is a permanent magnet.

According to the electromagnetic relay 1 of the ninth aspect, the design freedom of the electromagnetic relay 1 can be increased.

The electromagnetic relay 1 of the tenth aspect of the present disclosure is
At least one of the first magnet unit 51, the second magnet unit 52, and the third magnet unit 53 is configured by an electromagnet.

According to the electromagnetic relay 1 of the tenth aspect, the degree of freedom in design of the electromagnetic relay 1 can be enhanced.

The electromagnetic relay 1 of the eleventh aspect of the present disclosure is
A box-shaped insulating contact case 20 in which the first fixed contact 33, the second fixed contact 34, and the movable contact 40 are disposed;
It occurs when the first movable contact portion 41 contacts or separates from the first fixed contact portion 33 and the second movable contact portion 42 contacts or separates from the second fixed contact portion 34. In the area of the contact case 20 where an arc is attracted by the first magnet unit 51, the second magnet unit 52, and the third magnet unit 53, the inside of the contact case 20 and the outside of the contact case 20 And a through hole 90 communicating with the other.

According to the electromagnetic relay 1 of the eleventh aspect, the arc generated when the movable contact portions 41, 42 contact or break with the corresponding fixed contact portions 33, 34 corresponds to the magnet portions 51, 52, 53, respectively. By providing the through hole 90 communicating with the inside of the contact case 20 and the outside of the contact case 20 in the area of the contact case 20 which is induced by the gas, the gas generated due to the generated arc is It flows toward the outside of the contact case 20. This gas flow makes it easy to stretch the arc and can be easily extinguished.

In addition, the effect which each has can be show | played by combining suitably the arbitrary embodiment or modification of said various embodiment or modification. Further, a combination of the embodiments or a combination of the embodiments or a combination of the embodiments and the embodiments is possible, and a combination of the features in different embodiments or the embodiments is also possible.

While the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such variations and modifications are to be understood as included within the scope of the present disclosure as set forth in the appended claims, unless they depart therefrom.

The electromagnetic relay of the present disclosure can be applied to, for example, a car.

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 1st yoke 231 through hole 24 accommodation part 25 magnet holder 251 through hole 31 first fixed terminal 32 second fixed terminal 33 first fixed contact portion 34 second fixed contact portion 35 movable shaft 351 flange portion 352 coil spring holding portion 36 coil spring 40 movable contact 41 first movable contact portion 42 second movable contact portion 51 first 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 shield part for arc 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)

1. A first fixed terminal and a second fixed terminal which are arranged independently of each other and respectively have a first fixed contact portion and a second fixed contact portion;
   It has a first movable contact portion and a second movable contact portion respectively facing the first fixed contact portion and the second fixed contact portion, each of the first movable contact portion and the second movable contact portion being the first movable contact portion and the second movable contact portion. (1) A movable contact member movably disposed in an approaching / removing direction in which the fixed contact portion and the second fixed contact portion contact or are separated.
   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 when viewed from the contact / separation direction, and the ends on the movable contact side have the same polarity. Equipped with
   The end on the movable contact side of the first magnet unit has a polarity different from the polarity of the end on the movable contact side of the second magnet unit and the third magnet unit. Electromagnetic relay.
2. The movable contact further includes 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 when viewed from the contact / separation direction.
   The electromagnetic relay according to claim 1, wherein the end on the movable contact side of the fourth magnet unit has a polarity different from the polarity of the end on the movable contact side of the first magnet unit. .
3. The electromagnetic wave according to claim 2, wherein the position of the first magnet unit in the contact / separation direction with respect to the movable contact and the position of the fourth magnet unit in the contact / separation direction with respect to the movable contact are different from each other. relay.
4. The electromagnetic relay according to any one of claims 1 to 3, wherein the first magnet unit is disposed between the first movable contact unit and the second movable contact unit.
5. Each of the second magnet unit and the third magnet unit is disposed symmetrically with respect to a center line of the movable contact extending in a direction orthogonal to the arrangement direction when viewed from the contact / separation direction. The electromagnetic relay according to any one of Items 1 to 4.
6. The first magnet portion has a first flat surface at an end portion on the movable contact side, and the second magnet portion has a second flat surface at an end portion on the movable contact side. The third magnet unit has a third flat surface at an end on the movable contact side,
   The first flat surface is disposed parallel to a virtual straight line extending in the arrangement direction when viewed from the contact and separation direction, and the second flat surface and the third flat surface are viewed from the contact and separation direction. The electromagnetic relay according to any one of claims 1 to 5, wherein the electromagnetic relay is disposed to be orthogonal to the virtual straight line.
7. The electromagnetic relay according to any one of claims 1 to 6, further comprising an arc shield portion spaced from the movable contact in a direction orthogonal to the contact / separation direction.
8. The electromagnetic relay according to any one of claims 1 to 7, further comprising a magnetic body connecting at least two of the first magnet unit, the second magnet unit, and the third magnet unit.
9. 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 a permanent magnet.
10. 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.
11. A box-shaped insulating contact case in which the first fixed contact portion, the second fixed contact portion, and the movable contact are disposed;
    The 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 the area of the contact case induced by the first magnet unit, the second magnet unit, and the third magnet unit. The electromagnetic relay according to any one of claims 1 to 10, wherein

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