An electromagnetic relay based on soft magnets to achieve arc extinguishing

Abstract

The invention discloses an electromagnetic relay for realizing arc extinguishing based on soft magnetic body, comprising a moving spring part, a static spring part, an armature part and a push card; the moving push card is composed of a soft magnetic material body on one side and an insulating material body on the other side; the soft magnetic material body of the push card is provided with a first clamping part, which is clamped and matched with the moving spring piece; the insulating material body of the push card is clamped and matched with the armature part; one end of the soft magnetic material body of the push card corresponds to the side where the moving contact and the static contact are matched, and the projection of one end of the soft magnetic material body at the moving and static contacts at least covers part of the gap between the moving and static contacts when the contacts are disconnected. This structure of the invention can realize arc extinguishing, and at the same time has no polarity requirement for the wiring of the relay, and can also avoid the disadvantage that the magnetic steel installation position needs to be set in the prior art, which makes the volume of the relay product larger.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to an electromagnetic relay for achieving arc extinguishing based on a soft magnetic body. Background Art

[0002] A relay is an electronic control device that has a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] When the moving contact (moving contact) and the stationary contact (stationary contact) in a switching device such as a relay are disconnected, an arc is usually generated. Using an external magnetic field to push the arc to the arc extinguishing chamber to achieve forced arc extinguishing is a common arc extinguishing method. In the prior art, in the DC field of relays, a block made of hard magnetic material (i.e., a permanent magnet, also called magnetic steel) is usually used as an external magnetic field to achieve arc extinguishing. The product formed by this structure has polarity in practical wiring and cannot be used in the AC field. In addition, the installation position of the magnetic steel needs to be set in the relay, which makes the product volume larger, and the miniaturization of the relay product volume cannot be achieved, and the cost is also increased. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electromagnetic relay based on soft magnets to achieve arc extinguishing, which can not only achieve arc extinguishing, but also has no polarity requirements for the wiring of the relay, and can also avoid the disadvantage of the prior art that the magnetic steel installation position needs to be set, which makes the volume of the relay product larger.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an electromagnetic relay based on soft magnetic material to realize arc extinguishing, comprising a moving spring part, a static spring part, an armature part and a push card; the moving spring part comprises a moving spring piece and a moving contact connected to one end of the moving spring piece; the static spring part comprises a static spring piece and a static contact connected to one end of the static spring piece, and the moving and static contacts are in matching positions; the push card is composed of a soft magnetic material body on one side and an insulating material body on the other side; the soft magnetic material body of the push card is provided with a first clamping part, which is connected to the The moving spring piece is engaged and matched; the insulating material body of the push card is provided with a second clamping part, which is engaged and matched with the armature part; one end of the soft magnetic material body of the push card corresponds to the side where the moving contact and the static contact match, and the projection of one end of the soft magnetic material body at the moving and static contacts at least covers part of the gap between the moving and static contacts when the contacts are disconnected, so as to utilize the magnetizing magnetic field formed by the magnetization of the soft magnetic material body by the arc magnetic field when the moving and static contacts are disconnected, so that the arc is always guided to the direction of the soft magnetic material body to achieve arc extinguishing.

[0006] The distance from one end of the soft magnetic material body to the static contact, and the distance from one end of the soft magnetic material body to the static reed sheet, are both greater than the disconnection distance between the moving contact and the static contact.

[0007] The soft magnetic material body is a part made of magnetically conductive ferromagnetic material.

[0008] The soft magnetic material body is a part made of a metal material with a high melting point.

[0009] The first clamping portion is arranged at one end of the soft magnetic material body, and a first riveting portion is arranged at the other end of the soft magnetic material body. The second clamping portion is arranged at one end of the insulating material body, and a second riveting portion is arranged at the other end of the insulating material body. The soft magnetic material body and the insulating material body are fixedly connected to form an integral component by riveting between the first riveting portion and the second riveting portion.

[0010] The first clamping part is arranged at one end of the soft magnetic material body, and the insulating material body is covered on the other end of the soft magnetic material body by injection molding, so that the soft magnetic material body and the insulating material body are connected into an integral component.

[0011] The other end of the soft magnetic material body is also provided with a plurality of through holes, and the insulating material body is filled in the plurality of through holes of the soft magnetic material body to enhance the connection strength between the soft magnetic material body and the insulating material body.

[0012] One end of the soft magnetic material body is provided with a bent laminate to increase the thickness of the one end of the soft magnetic material body and enhance the arc striking capability.

[0013] A magnetic conductive block is also riveted or welded to one end of the soft magnetic material body to increase the thickness of the one end of the soft magnetic material body and enhance the arc striking capability.

[0014] The first clamping part includes a first pushing arm arranged at one end of the soft magnetic material body, a second pushing arm arranged in one end of the soft magnetic material body, and a clamping groove formed between the first pushing arm and the second pushing arm, and the movable spring is clamped in the clamping groove.

[0015] The first pushing arm and the second pushing arm are staggered, and the first pushing arm is closer to the connection line between the moving and static contacts than the second pushing arm.

[0016] The first pushing arm and the second pushing arm are respectively provided with a protrusion on one side matching with the moving spring sheet.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention adopts a push card composed of a soft magnetic material body on one side and an insulating material body on the other side; the soft magnetic material body of the push card is provided with a first clamping portion, which is clamped and matched with the movable spring; the insulating material body of the push card is provided with a second clamping portion, which is clamped and matched with the armature part; one end of the soft magnetic material body of the push card corresponds to the side where the moving contact and the static contact cooperate, and the projection of one end of the soft magnetic material body at the moving and static contacts at least covers part of the gap between the moving and static contacts when the contacts are disconnected, so that the arc is always guided to the direction of the soft magnetic material body to achieve arc extinguishing by utilizing the magnetic field formed by the magnetization of the soft magnetic material body by the arc magnetic field when the moving and static contacts are disconnected. According to the structure of the present invention, when the contacts are disconnected, an arc is generated between the contacts, and the arc current generates a magnetic field. The magnetic field magnetizes the soft magnetic material body. The magnetic field after the magnetization of the soft magnetic material body generates a magnetic blowing force to move the arc toward the front end of the soft magnetic material body. The arc is elongated and extinguished faster, thereby improving the arc extinguishing ability of the relay. Since the direction of the magnetized magnetic field of the soft magnetic material body changes with the positive and negative directions of the current, there is no polarity requirement for the wiring of the relay. At the same time, since the push card is a necessary part of the relay, there is no need to increase parts and increase costs, and there is no need to design the installation position required by the use of magnetic steel in the prior art, which facilitates the miniaturization of the relay product.

[0019] 2. The present invention adopts a distance from one end of the soft magnetic material body to the static contact, and a distance from one end of the soft magnetic material body to the static spring piece, which are both greater than the disconnection distance between the moving contact and the static contact. This structure of the present invention can ensure a certain air gap, so that the arc will not be generated between the push card and the static contact, and between the push card and the static spring piece, thereby avoiding the push card with the soft magnetic material body from being broken down.

[0020] 3. The present invention adopts a push card composed of a soft magnetic material body on one side and an insulating material body on the other side; the soft magnetic material body of the push card is provided with a first clamping portion, which is engaged with the moving spring. This structure of the present invention adopts a soft magnetic material body and a moving spring to engage with each other. Compared with the prior art of a plastic material body and a moving spring to engage with each other, the soft magnetic material body is resistant to high temperatures, which can avoid the disadvantage of the plastic push card melting at high temperature and adhering to the moving spring, causing the relay to fail.

[0021] 4. The present invention adopts the method of making one end of the soft magnetic material body of the push card correspond to the side where the moving contact and the static contact cooperate, that is, the soft magnetic body is located at the head position of the push rod that cooperates with the moving spring sheet, which has good thermal conductivity and can quickly cool the arc temperature to achieve the effect of rapid arc initiation and arc breaking.

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay for achieving arc extinguishing based on a soft magnetic body of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a principle illustration Figure 1 ;

[0024] Figure 2 It is a principle illustration Figure 2 ;

[0025] Figure 3 It is a partial structural diagram of the first embodiment of the present invention (contacts closed);

[0026] Figure 4 It is a schematic diagram of a movable spring piece and a push card in the first embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the cooperation between the movable spring and the push card of the first embodiment of the present invention;

[0028] Figure 6 It is a front view of the movable spring piece and the push card in the first embodiment of the present invention;

[0029] Figure 7 It is a top view of the movable spring piece and the push card in the first embodiment of the present invention;

[0030] Figure 8 is a schematic diagram of the three-dimensional structure of the push card according to the first embodiment of the present invention;

[0031] Fig. 9 is a structural cross-sectional view of a push card according to Embodiment 1 of the present invention;

[0032] Fig.10 Schematic diagram of the formation of the magnetized magnetic field of the push card according to the first embodiment of the present invention;

[0033] Fig.11 It is a schematic diagram of arc extinguishing of the magnetizing magnetic field of the push card in the first embodiment of the present invention;

[0034] Fig.12 is a schematic diagram of the three-dimensional structure of the push card of the second embodiment of the present invention;

[0035] Fig.13 is a schematic diagram of the exploded structure of the push card of the second embodiment of the present invention;

[0036] Fig.14 It is a schematic diagram of a movable spring piece and a push card in the third embodiment of the present invention;

[0037] Fig.15 is a schematic diagram of the cooperation between the movable spring and the push card of the third embodiment of the present invention;

[0038] Fig.16 It is a front view of the movable spring piece and the push card in the fourth embodiment of the present invention;

[0039] Fig.17 It is a schematic diagram of the structure of the push card of the fifth embodiment of the present invention. DETAILED DESCRIPTION

[0040] Principle description: Figure 1 As shown, when the arc current 100 flows outward perpendicularly to the plane of the drawing, a magnetic field M1 is formed around the arc, and the magnetic field M1 magnetizes the soft magnetic material body 200 (such as electrical pure iron) to form a magnetized magnetic field M2 with the N pole on the left and the S pole on the right. Under the action of the magnetized magnetic field M2, an upward magnetic blowing force F1 is formed, that is, the arc current 100 is hit toward the soft magnetic material body 200; Figure 2 As shown, when the arc current 100 flows inward perpendicularly to the plane of the figure, a magnetic field M3 is formed around the arc. The magnetic field M3 magnetizes the soft magnetic material body 200 to form a magnetizing magnetic field M4 with the N pole on the right and the S pole on the left. Under the action of the magnetizing magnetic field M4, an upward magnetic blowing force F2 is formed, which makes the arc current 100 hit the soft magnetic material body 200; therefore, no matter what the direction of the arc current 100 is, the arc current 100 can be directed toward the direction of the soft magnetic material body 200.

[0041] Embodiment 1

[0042] See also Figures 3 to 11 As shown, an electromagnetic relay based on soft magnetic material for achieving arc extinguishing of the present invention comprises a moving spring part 1, a static spring part 2, an armature part 3 and a push card 4; the moving spring part 1 comprises a moving spring piece 11 and a moving contact 12 connected to one end of the moving spring piece; the static spring part 2 comprises a static spring piece 21 and a static contact 22 connected to one end of the static spring piece, and the moving contact 12 and the static contact 22 are in a matching position; the push card 4 is composed of a soft magnetic material body 41 on one side and an insulating material body 42 on the other side. In this embodiment, the soft magnetic material body 41 is a magnetically conductive ferromagnetic material, specifically pure iron, and the insulating material body 42 is plastic. Of course, the soft magnetic material body can also be a metal material with a high melting point, such as a metal material with a melting point of 150 Steel above 0°C; the soft magnetic material body 41 of the push card 4 is provided with a first clamping portion, which is clamped and matched with the moving spring piece 11; the insulating material body 42 of the push card 4 is provided with a second clamping portion 421, which is clamped and matched with the armature part 3, and the second clamping portion 421 is set as a clamping hole structure; one end 411 of the soft magnetic material body 41 of the push card 4 corresponds to the side where the moving contact 12 and the static contact 22 cooperate, and the projection of one end 411 of the soft magnetic material body at the moving and static contacts at least covers part of the gap between the moving and static contacts when the contacts are disconnected, so as to utilize the magnetization magnetic field formed by the magnetization of the soft magnetic material body by the arc magnetic field when the moving and static contacts are disconnected, so that the arc is always guided to the direction of the soft magnetic material body to achieve arc extinguishing; such as Fig.10 , Fig.11As shown, when the current I flows from the static reed into the moving reed and out, an arc magnetic field M5 is formed around the arc current 10. Under the magnetization effect of the arc magnetic field M5, a magnetizing magnetic field M6 is formed in the soft magnetic material body 41. Under the effect of the magnetic blowing force F3 of the magnetizing magnetic field M6, the arc current 10 is directed to one end 411 of the soft magnetic material body 41.

[0043] In this embodiment, the distance from one end 411 of the soft magnetic material body 41 to the static contact 22 and the distance from one end 411 of the soft magnetic material body to the static reed 41 are both greater than the disconnection distance between the moving contact 12 and the static contact 22 .

[0044] In this embodiment, the first clamping portion is provided at one end of the soft magnetic material body 41, and the insulating material body 42 is coated on the other end of the soft magnetic material body 41 by injection molding, so that the soft magnetic material body 41 and the insulating material body 42 are connected into an integral component.

[0045] In this embodiment, the other end of the soft magnetic material body 41 is further provided with a plurality of through holes 412 , and the insulating material body 42 is filled in the plurality of through holes 412 of the soft magnetic material body to enhance the connection strength between the soft magnetic material body 41 and the insulating material body 42 .

[0046] In this embodiment, the first clamping part includes a first pushing arm arranged at one end of the soft magnetic material body (that is, one end of the soft magnetic material body constitutes the first pushing arm), a second pushing arm 413 arranged in one end of the soft magnetic material body, and a clamping groove 414 formed between the first pushing arm 411 and the second pushing arm 413, and the movable spring sheet 11 is clamped in the clamping groove 414.

[0047] In this embodiment, the slot 414 is substantially I-shaped, and is suitable for inserting the moving spring from the middle, such as for double contacts.

[0048] In this embodiment, the first pushing arm 411 and the second pushing arm 413 are staggered, and the first pushing arm 411 is closer to the line between the moving and static contacts than the second pushing arm 413 .

[0049] In this embodiment, the first push arm 411 and the second push arm 413 are provided with protrusions 415 and 416 on the side that matches with the moving spring piece 11. The first push arm 411 is used to pull the moving spring piece 11 apart through the protrusion 415 to disconnect the moving and static contacts, and the second push arm 413 is used to push the moving spring piece 11 through the protrusion 416 to close the moving and static contacts.

[0050] The electromagnetic relay for realizing arc extinguishing based on soft magnets of the present invention adopts a push card 4 composed of a soft magnetic material body 41 on one side and an insulating material body 42 on the other side; the soft magnetic material body 41 of the push card is provided with a first clamping portion, which is clamped and matched with the moving spring 11; the insulating material body 42 of the push card is provided with a second clamping portion, which is clamped and matched with the armature part 3; an end head 411 of the soft magnetic material body 41 of the push card corresponds to the side where the moving contact 12 and the static contact 22 cooperate, and the projection of the end head 411 of the soft magnetic material body at the moving and static contacts at least covers part of the gap between the moving and static contacts when the contacts are disconnected, so as to utilize the magnetic field formed by the magnetization of the soft magnetic material body by the arc magnetic field when the moving and static contacts are disconnected, so that the arc is always guided to the direction of the soft magnetic material body to realize arc extinguishing. According to the structure of the present invention, when the contacts are disconnected, an arc current 10 is generated between the contacts, and the arc current 10 generates a magnetic field M5. The magnetic field M5 magnetizes the soft magnetic material body 41. The magnetic field M6 after the magnetization of the soft magnetic material body 41 generates a magnetic blowing force F3 to move the arc toward the front end of the soft magnetic material body. The arc is elongated and extinguished faster, thereby improving the arc extinguishing ability of the relay. Since the direction of the magnetized magnetic field of the soft magnetic material body changes with the positive and negative directions of the current, there is no polarity requirement for the wiring of the relay. At the same time, since the push card 4 is a necessary part of the relay, there is no need to increase parts and increase costs, nor is there any need to design the installation position required by the use of magnetic steel in the prior art, which facilitates the miniaturization of the relay product.

[0051] In the electromagnetic relay for realizing arc extinguishing based on soft magnetic body of the present invention, the distance between the end 411 of the soft magnetic body and the static contact 22, and the distance between the end 411 of the soft magnetic body and the static reed 21 are both greater than the disconnection distance between the moving contact 12 and the static contact 22. This structure of the present invention can ensure a certain air gap, so that the arc will not be generated between the push card and the static contact, and between the push card and the static reed, thereby avoiding the breakdown of the push card with the soft magnetic body.

[0052] The electromagnetic relay based on soft magnetic material to realize arc extinguishing of the present invention adopts a push card 4 composed of a soft magnetic material body 41 on one side and an insulating material body 42 on the other side; the soft magnetic material body 41 of the push card is provided with a first clamping part, which is clamped and matched with the moving spring piece 11. This structure of the present invention adopts the clamping and matching of the soft magnetic material body 41 and the moving spring piece 11. Compared with the clamping and matching of the plastic material body and the moving spring piece in the prior art, the soft magnetic material body 41 is resistant to high temperature, which can avoid the disadvantage of the plastic push card melting at high temperature and adhering to the moving spring piece, causing the relay to fail.

[0053] The electromagnetic relay of the present invention realizes arc extinguishing based on soft magnets, and one end of the soft magnetic material body 41 of the push card 4 is arranged to correspond to the side where the moving contact and the static contact cooperate, that is, the soft magnet is located at the head position of the push rod that cooperates with the moving spring sheet, has good thermal conductivity, can quickly cool the arc temperature, and achieve the effect of rapid arc initiation and arc breaking.

[0054] Embodiment 2

[0055] See also Fig.12 Fig.13 As shown, an electromagnetic relay for realizing arc extinguishing based on a soft magnetic material of the present invention is different from the first embodiment in that the connection method of the soft magnetic material body 41 and the insulating material body 42 is different. In this embodiment, the first clamping portion is arranged at one end of the soft magnetic material body 41, and the other end of the soft magnetic material body is provided with a first riveting portion, that is, a rivet hole 417, and the second clamping portion is arranged at one end of the insulating material body 42, and the other end of the insulating material body is provided with a second riveting portion, that is, a rivet hole 422. The soft magnetic material body 41 and the insulating material body 42 are fixedly connected to form an integral component by riveting between the first riveting portion and the second riveting portion, that is, the rivet hole 417 of the soft magnetic material body 41 and the rivet hole 422 of the insulating material body 42 are riveted together by the rivet 43.

[0056] Embodiment 3

[0057] See also Fig.14 Fig.15 As shown, an electromagnetic relay for realizing arc extinguishing based on soft magnets of the present invention is different from the first embodiment in that the slot 418 between the first push arm 411 and the second push arm 413 is open on one side, suitable for inserting the moving spring 11 from one side.

[0058] Embodiment 4

[0059] See also Fig.16 As shown, an electromagnetic relay for realizing arc extinguishing based on a soft magnetic material of the present invention is different from the first embodiment in that an end 411 of the soft magnetic material body is provided with a bent laminate 51 to increase the thickness of the end 411 of the soft magnetic material body and enhance the arc striking capability.

[0060] Embodiment 5

[0061] See also Fig.17 As shown, an electromagnetic relay for achieving arc extinguishing based on a soft magnetic material of the present invention is different from the first embodiment in that a magnetic conductive block 52 is also riveted or welded to one end 411 of the soft magnetic material body to increase the thickness of the one end 411 of the soft magnetic material body and enhance the arc striking capability.

[0062] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An electromagnetic relay for realizing arc extinguishing based on soft magnets, comprising a moving spring part, a static spring part, an armature part and a push card; the moving spring part comprises a moving spring piece and a moving contact connected to one end of the moving spring piece; the static spring part comprises a static spring piece and a static contact connected to one end of the static spring piece, and the moving and static contacts are in matching positions; characterized in that: The push card is composed of a soft magnetic material body on one side and an insulating material body on the other side; the soft magnetic material body of the push card is provided with a first clamping portion, which is clamped and matched with the moving spring sheet; the insulating material body of the push card is provided with a second clamping portion, which is clamped and matched with the armature part; one end of the soft magnetic material body of the push card corresponds to the side where the moving contact and the static contact cooperate, and the projection of one end of the soft magnetic material body at the moving and static contacts at least covers part of the gap between the moving and static contacts when the contacts are disconnected, so as to utilize the magnetizing magnetic field formed by the magnetization of the soft magnetic material body by the arc magnetic field when the moving and static contacts are disconnected, so that the arc is always guided in the direction of the soft magnetic material body to achieve arc extinguishing.

2. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1, characterized in that: The distance from one end of the soft magnetic material body to the static contact, and the distance from one end of the soft magnetic material body to the static reed sheet, are both greater than the disconnection distance between the moving contact and the static contact.

3. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1 or 2, characterized in that: The soft magnetic material body is a part made of magnetically conductive ferromagnetic material.

4. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1 or 2, characterized in that: The soft magnetic material body is a part made of a metal material with a high melting point.

5. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1 or 2, characterized in that: The first clamping portion is arranged at one end of the soft magnetic material body, and a first riveting portion is arranged at the other end of the soft magnetic material body. The second clamping portion is arranged at one end of the insulating material body, and a second riveting portion is arranged at the other end of the insulating material body. The soft magnetic material body and the insulating material body are fixedly connected to form an integral component by riveting between the first riveting portion and the second riveting portion.

6. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1 or 2, characterized in that: The first clamping part is arranged at one end of the soft magnetic material body, and the insulating material body is covered on the other end of the soft magnetic material body by injection molding, so that the soft magnetic material body and the insulating material body are connected into an integral component.

7. The electromagnetic relay for realizing arc extinguishing based on soft magnetic material according to claim 6, characterized in that: The other end of the soft magnetic material body is also provided with a plurality of through holes, and the insulating material body is filled in the plurality of through holes of the soft magnetic material body to enhance the connection strength between the soft magnetic material body and the insulating material body.

8. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1 or 2, characterized in that: One end of the soft magnetic material body is provided with a bent laminate to increase the thickness of the one end of the soft magnetic material body and enhance the arc striking capability.

9. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1 or 2, characterized in that: A magnetic conductive block is also riveted or welded to one end of the soft magnetic material body to increase the thickness of the one end of the soft magnetic material body and enhance the arc striking capability.

10. The electromagnetic relay for achieving arc extinguishing based on soft magnets according to claim 1 or 2, characterized in that: The first clamping part includes a first pushing arm arranged at one end of the soft magnetic material body, a second pushing arm arranged in one end of the soft magnetic material body, and a clamping groove formed between the first pushing arm and the second pushing arm, and the movable spring is clamped in the clamping groove.

11. The electromagnetic relay for realizing arc extinguishing based on soft magnetic material according to claim 10, characterized in that: The first pushing arm and the second pushing arm are staggered, and the first pushing arm is closer to the connection line between the moving and static contacts than the second pushing arm.

12. The electromagnetic relay for realizing arc extinguishing based on soft magnets according to claim 10, characterized in that: The first pushing arm and the second pushing arm are respectively provided with a protrusion on one side matching with the moving spring sheet.

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