Electromagnetic relay for improving contact breaking force

Abstract

The utility model discloses an electromagnetic relay for improving the breaking force of contacts, which comprises at least one group of contact assemblies, each contact assembly comprises a movable spring part and a static spring part, and a movable contact of the movable spring part is correspondingly matched with a static contact of the static spring part so as to realize the closing or opening of the contacts; the spring further comprises a counter-force part capable of elastically deforming, the counter-force part is located on the side, facing the static spring part, of the movable spring part, the movable spring part pushes and extrudes the counter-force part in the process of moving towards the contact closing direction, the counter-force part is made to deform and store energy, and the counter-force part releases energy when the contact is disconnected. Compared with a relay in the prior art, the relay provided by the utility model has the advantages that the breaking force of the contact is greatly improved, the electrical durability of the relay is obviously improved, the normally open contact can switch a 80A load, and the contact cannot be stuck when being disconnected.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to an electromagnetic relay with improved contact breaking force. Background Art

[0002] An electromagnetic relay uses electromagnetic force to drive the relative motion of mechanical components to produce a predetermined response. It generally consists of a magnetic circuit, a movable spring, and a stationary spring. When current flows through the coil of the magnetic circuit, electromagnetic force is generated, attracting the armature, causing the movable contact of the movable spring to contact the stationary contact of the stationary spring. When the current in the coil disappears, the electromagnetic force dissipates, causing the armature to reset, separating the movable contact of the movable spring from the stationary contact of the stationary spring. This contact closure is achieved by the engagement or separation of the movable and stationary contacts. The contact breaking force of conventional relays is typically provided by a restoring spring fitted between the armature and yoke of the magnetic circuit and / or the deformation force of the movable spring itself. When the electrical durability of the relay is increased to 80A, conventional relays often fail to meet the required requirements, resulting in contact sticking when the contacts open. Utility Model Content

[0003] The utility model aims to solve the technical problems existing in the prior art and provides an electromagnetic relay with improved contact breaking force. Through structural improvement, the electrical durability of the relay is significantly improved. The normally open contact can switch a load of 80A without the contacts sticking.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an electromagnetic relay for improving the contact breaking force, comprising at least one group of contact components, wherein the contact component includes a dynamic spring part and a static spring part, and the dynamic contact of the dynamic spring part corresponds to the static contact of the static spring part to achieve contact closing or opening; and further comprising an elastically deformable reaction force piece, which is located on the side of the dynamic spring part facing the static spring part, and the dynamic spring part pushes the reaction force piece during the movement in the contact closing direction, so that the reaction force piece is deformed and stores energy, and the reaction force piece releases energy when the contact is disconnected.

[0005] Furthermore, it also includes a base, the reaction member is independent of the contact assembly and is installed on the base; the dynamic spring part and the static spring part are respectively installed on the base.

[0006] Furthermore, the reaction member includes a fixed portion and a deformable portion provided on the fixed portion, the fixed portion is mounted on the base, and the deformable portion faces the dynamic spring portion and cooperates with the dynamic spring portion.

[0007] Furthermore, the reaction member is a spring structure, one end of the deformable portion is fixed together with one end of the fixed portion, the other end of the fixed portion extends downward, and the other end of the deformable portion extends downward at an angle and approaches the dynamic spring portion and cooperates with the dynamic spring portion.

[0008] Furthermore, the portion where the deformation portion cooperates with the dynamic spring portion is an arc portion, and the convex arc surface of the arc portion faces the dynamic spring portion. During the contact closing or opening process, the convex arc surface of the arc portion forms a tangential motion with the surface of the dynamic spring portion.

[0009] Furthermore, the base is provided with a retaining wall on a side of the static spring portion facing away from the dynamic spring portion, the fixing portion of the reaction member is mounted on the retaining wall, and the reaction member is located above the static contact.

[0010] Furthermore, the retaining wall is provided with a slot, the fixing portion is inserted into the slot, and the two are in an interference fit.

[0011] Furthermore, the fixing portion is provided with a positioning rib for tightly fitting with the slot wall of the slot; the fixing portion is provided with a limiting protrusion on one side of its insertion direction, and the limiting protrusion is provided with anti-retraction hooks on two opposite sides respectively, and the retaining wall is provided with a limiting hole corresponding to the limiting protrusion, the limiting hole is connected to the slot, the limiting protrusion is inserted into the limiting hole, and the anti-retraction hook is stuck in the limiting hole.

[0012] Furthermore, the contact assemblies are multiple groups, and the multiple groups of contact assemblies are distributed in parallel, and the distribution direction of the multiple groups of contact assemblies is consistent with the matching direction of the moving contacts and the static contacts; the reaction force pieces are multiple, and the multiple reaction force pieces correspond one-to-one to the dynamic spring parts of the multiple groups of contact assemblies; the dynamic spring parts and the reaction force pieces are respectively laterally inserted into the base.

[0013] Furthermore, it also includes a magnetic circuit part, which is installed on the base. The magnetic circuit part includes an armature and a yoke. The armature is rotatably arranged at the edge of the yoke, and a restoring spring is arranged between the armature and the yoke to drive the armature to reset; the armature is connected to the dynamic spring part through a push card.

[0014] Furthermore, the dynamic spring part includes a dynamic spring lead-out piece, a rigid dynamic spring piece and a reaction spring piece, the dynamic spring lead-out piece is installed on the base, the upper end of the rigid dynamic spring piece is rotatably connected to the upper end of the dynamic spring lead-out piece, and a flexible conductive part is connected between the upper end of the rigid dynamic spring piece and the upper end of the dynamic spring lead-out piece, the rigid dynamic spring piece is located on the side of the dynamic spring lead-out piece facing the static spring part; the dynamic contact is provided at the lower end of the rigid dynamic spring piece, the reaction spring piece is provided on the rigid dynamic spring piece, and is located on the side of the rigid dynamic spring piece facing away from the static spring part; the reaction part is located on the side of the rigid dynamic spring piece facing the static spring part; the push card connects the reaction spring piece and the rigid dynamic spring piece.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Since the present invention further includes an elastically deformable reaction member, the reaction member is located on the side of the dynamic spring portion facing the static spring portion, and the dynamic spring portion pushes the reaction member during movement in the contact closing direction, causing the reaction member to deform and store energy, and the reaction member releases energy when the contacts are disconnected to increase the contact breaking force. Therefore, compared with the relays of the prior art, the present invention has a significantly improved contact breaking force, which significantly improves the electrical durability of the relay. The normally open contact can switch a load of 80A, and the contacts will not stick when they are disconnected.

[0017] 2. As a preferred embodiment, the reaction piece is independent of the contact assembly and is mounted on the base, making assembly of the reaction piece more convenient and the structural design of the reaction piece more flexible, and also allowing the dynamic spring part and the static spring part to continue using the original structure.

[0018] 3. The reaction piece, reaction spring and restoration spring together constitute the reaction force system. In the process from closing to opening of the contacts, the reaction piece only acts in the first half of the disconnection stage. Unlike the restoration spring, the reaction piece provides a phased force to speed up the disconnection speed. It not only extinguishes the arc generated by the contact disconnection quickly, but also significantly improves the electrical durability of the relay. It also has no effect on the operating voltage and does not need to increase the power consumption of the coil.

[0019] 4. The reaction piece, reaction spring, and return spring together constitute the reaction force system. During the contact opening and closing process, the reaction piece only acts in the second half of the closing phase. Unlike the return spring, the reaction piece provides a phased force. The dynamic spring is only responsible for conducting current and does not deform to achieve the contact closing pressure. The contact closing pressure is mainly achieved by the difference between the deformation of the reaction spring and the deformation of the reaction piece.

[0020] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments; however, the present invention of an electromagnetic relay with enhanced contact breaking force is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the main view of the utility model;

[0022] Figure 2 It is a top view of the utility model;

[0023] Figure 3 It is a right side view of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the reaction piece of the utility model Figure 1 ;

[0025] Figure 5 This is a schematic diagram of the structure of the reaction piece of the utility model Figure 2 (Partial cross-section);

[0026] Figure 6 This is a schematic diagram of the structure of the reaction piece of the utility model Figure 3 ;

[0027] Figure 7 This is a suction and reaction force simulation test curve diagram of the utility model;

[0028] In the figure, 1. moving spring part; 11. moving contact; 12. rigid moving spring piece; 13. moving spring lead-out piece; 14. reaction spring piece; 15. flexible conductive part; 2. static spring part; 21. static contact; 22. static spring piece; 3. reaction piece, 31. deformation part; 311. arc part; 32. fixing part; 321. positioning rib; 33. limiting protrusion; 331. anti-retraction hook; 4. base, 41. retaining wall; 411. slot; 42. partition wall; 5. magnetic circuit part; 51. coil frame; 52. coil; 53. armature; 54. yoke; 55. restoration spring piece; 6. push card; 61. push part; 7. limiting rod; 8. auxiliary moving spring piece; 9. auxiliary static spring piece. DETAILED DESCRIPTION

[0029] In the description of this utility model, the use of terms such as "upper," "lower," "left," "right," "front," "back," "inner," and "outer" to indicate directions or positional relationships is based on the directions or positional relationships shown in the accompanying drawings and is intended solely to facilitate the description of this utility model. They do not indicate or imply that the device referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the scope of protection of this utility model. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0030] In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more, and the same applies to "multiple groups". In the description of the present invention, unless otherwise specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integral connection, mechanical connection, electrical connection, direct connection, indirect connection through an intermediate medium, and internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] See Figure 1-Figure 7 As shown, the present invention discloses an electromagnetic relay for improving contact breaking force, comprising at least one contact assembly, including a movable spring portion 1 and a stationary spring portion 2. The movable contact 11 of the movable spring portion 1 corresponds to and cooperates with the stationary contact 21 of the stationary spring portion 2 to achieve contact closing or opening. The present invention also includes an elastically deformable reaction member 3, located on the side of the movable spring portion 1 facing the stationary spring portion 2. As the movable spring portion 1 moves in the direction of contact closing, it pushes against the reaction member 3, causing it to deform and store energy. This energy is released when the contacts open, thereby improving the contact breaking force.

[0032] The present invention further includes a base 4, to which the dynamic spring portion 1 and the static spring portion 2 are respectively mounted. The reaction member 3 is independent of the contact assembly and mounted on the base 4, but is not limited thereto. In other embodiments, the reaction member is provided on the dynamic spring portion or the static spring portion.

[0033] In this embodiment, the reaction member 3 includes a fixed portion 32 and a deformable portion 31 provided on the fixed portion 32. The fixed portion 32 is mounted on the base 4. Specifically, the fixed portion 32 is inserted into a slot 411 provided on the base 4. The deformable portion 31 faces the movable spring portion 1 and cooperates with the movable spring portion 1. Specifically, the reaction member 3 is a leaf spring structure, and one end of the deformable portion 31 is fixed together with one end of the fixed portion 32. Specifically, one end of the deformable portion 31 is integrally formed with one end of the fixed portion 32. The other end of the fixed portion 32 extends downward, and the other end of the deformable portion 31 extends downward at an angle and approaches the movable spring portion 1, and cooperates with the movable spring portion 1. Therefore, the reaction member 3 is roughly in the shape of an inverted U, and its opening faces the movable contact 11 and the static contact 21. In particular, the portion where the deformation portion 31 cooperates with the dynamic spring portion 1 is the arc portion 311, which is located at the other end of the deformation portion 31, and the convex arc surface of the arc portion 311 faces the dynamic spring portion 1. In this way, when the dynamic spring portion 1 and the reaction member 3 are released, as the dynamic spring portion 1 moves, the surface of the dynamic spring portion 1 and the convex arc surface of the arc portion 311 form a tangential motion, so that the dynamic spring portion 1 and the reaction member 3 are in line-surface cooperation, reducing the friction between the two. On the other hand, when the dynamic spring portion 1 moves in the direction of contact closing, it can slide and cooperate with the reaction member 3, so that the dynamic spring portion 1 moves smoothly.

[0034] In this embodiment, the base 4 is provided with a retaining wall 41 on the side of the static spring portion 2 facing away from the dynamic spring portion 1. The fixed portion 32 of the reaction member 3 is mounted on this retaining wall 41, and the reaction member 3 is positioned above the static contact 21. Because the fixed portion 32 of the reaction member 3 is inserted into the slot 411 of the base 4, the retaining wall 41 is provided with the slot 411. The fixed portion 32 and the slot 411 form an interference fit. Specifically, the fixed portion 32 is provided with a positioning rib 321 for tight engagement with the wall of the slot 411. The positioning rib 321 is located on one side of the fixed portion 32 in the thickness direction. There are multiple positioning ribs 321, specifically two, but not limited to this.

[0035] The fixing portion 32 is provided with a stopper protrusion 33 on one side of the insertion direction. Retention barbs 331 are provided on opposite sides of the stopper protrusion 33. The base 4 is provided with a stopper hole (not shown) corresponding to the stopper protrusion 33. The stopper hole communicates with the slot 411, and the stopper protrusion 33 is inserted into the stopper hole, with the retention barbs 331 engaging the stopper hole. The stopper hole is specifically provided in the retaining wall 41, at the bottom of the slot 411. With the cooperation between the fixing portion 32 and the slot 411, and the stopper protrusion 33 and the stopper hole, the reaction member 3 is securely fixed to the base 4.

[0036] In this embodiment, there are multiple groups of contact assemblies, which are distributed in parallel, and the distribution direction of the multiple groups of contact assemblies is consistent with the matching direction of the moving contact 11 and the static contact 21. There are multiple reaction pieces 3, and the multiple reaction pieces 3 correspond one-to-one to the dynamic spring parts 1 of the multiple groups of contact assemblies. This embodiment takes two groups of contact assemblies and two reaction pieces 3 as an example, but is not limited to this. The matching direction of the moving contact 11 and the static contact 21 is the length direction of the base 4, which is also Figure 1 The left and right directions of the viewing angle are shown. Therefore, the two sets of contact assemblies are distributed along the length (i.e., left and right) of the base 4. The movable spring portion 1 and reaction member 3 are each laterally inserted into the base 4. Specifically, the movable spring portion 1 and reaction member 3 are each inserted into the base 4 from one side (i.e., forward or rearward) of the width direction of the base 4. Therefore, the limiting protrusion 33 is located on one side of the fixing portion 32 in the width direction, and the width direction of the fixing portion 32 is consistent with the width direction of the base 4.

[0037] The present invention also includes a magnetic circuit portion 5, which is mounted on the base 4. The magnetic circuit portion 5 includes a coil frame 51, an iron core (not shown in the figure), an armature 53 and a yoke 54. The coil frame 51 is horizontal and is wound with a coil 52. The iron core is inserted into the coil frame 51. The yoke 54 is L-shaped, and one side of the yoke 54 is fixedly connected to one end of the iron core. The other side of the yoke 54 is located outside the coil frame 51. The armature 53 is rotatably arranged at the edge of the other side of the yoke 54 and is located at one axial end of the coil frame 51. A restoring spring 55 is arranged between the armature 53 and the yoke 54 to drive the armature 53 to reset. The armature 53 is connected to each dynamic spring portion 1 by pushing the card 6.

[0038] In this embodiment, the dynamic spring portion 1 includes a dynamic spring lead-out piece 13, a rigid dynamic spring piece 12, and a reaction spring piece 14. The dynamic spring lead-out piece 13 is laterally inserted into the base 4. The upper end of the rigid dynamic spring piece 12 is rotatably connected to the upper end of the dynamic spring lead-out piece 13. A flexible conductive member 15 is connected between the upper ends of the rigid dynamic spring piece 12 and the upper ends of the dynamic spring lead-out piece 13. The rigid dynamic spring piece 12 is located on the side of the dynamic spring lead-out piece 13 facing the static spring portion 2. The dynamic contact 11 is provided at the lower end of the rigid dynamic spring piece 12. The reaction spring piece 14 is provided on the side of the rigid dynamic spring piece 12 facing away from the static spring portion 2. The reaction member 3 is located on the side of the rigid dynamic spring piece facing the static spring portion 2. A push card 6 connects the reaction spring piece 14 and the rigid dynamic spring piece 12. The static spring portion 2 includes a static spring piece 22, which is mounted on the base 4 and has a static contact 21.

[0039] In this embodiment, the coil bobbin 51 and the multiple sets of contact assemblies are arranged along the width of the base 4, separated from the contact assemblies by a partition wall 42 provided on the base 4. Since there are two sets of contact assemblies, two retaining walls 41 are provided, each integrally formed on the side of the partition wall 42 facing the contact assemblies. The pusher card 6 is located in front of the multiple sets of contact assemblies and extends along the length of the base 4. Each retaining wall 41 has a corresponding clearance slot for the pusher card 6. Furthermore, each retaining wall 41 is equipped with a stopper rod 7 to restrain the pusher card 6 and prevent it from falling off.

[0040] The present invention also includes an auxiliary contact assembly, which includes an auxiliary moving spring 8 provided with an auxiliary moving contact and an auxiliary static spring 9 provided with an auxiliary static contact. The auxiliary moving spring 8 and the auxiliary static spring 9 are respectively mounted on the base 4 and located below the armature 53; the push card 6 is provided with a pushing portion 61 for driving the auxiliary moving spring to move, such as Figure 3 shown.

[0041] The present utility model is an electromagnetic relay for improving the contact breaking force. When the coil is energized, the magnetic circuit portion 5 generates a magnetic field, the armature 53 is attracted by the iron core to rotate, and drives the push card 6 to move to the right, so that the push card 6 drives the rigid movable spring 12 and the reaction force spring 14 to move in the contact closing direction. When the movable contact 11 moves to a certain stroke, the rigid movable spring 12 contacts the other end of the deformable portion 31 of the reaction force member 3. As the rigid movable spring 12 continues to move in the contact closing direction, the rigid movable spring 12 pushes the deformable portion 31 of the reaction force member 3, causing the deformable portion 31 to deform and store energy. When the moving contact 11 contacts the static contact 21, as the push card 6 continues to move to the right, the reaction spring 14 begins to deform elastically, and the reaction piece 3 has also deformed elastically. When the armature 53 is in complete contact with the pole shoe surface of the iron core, the deformation of the reaction spring 14 ends. At this time, the contact overtravel is achieved by the difference in elastic deformation between the reaction spring 14 and the reaction piece 3.

[0042] When the coil is de-energized, the magnetic field of the magnetic circuit portion 5 disappears, and the armature 53 rotates in the opposite direction under the action of the restoring spring 55, and drives the push card 6 to move to the left, so that the push card 6 drives the rigid movable spring 12 to move in the direction of contact disconnection. At the same time, the deformed portion 31 of the reaction member 3 releases energy, assisting the rigid movable spring 12 to move in the direction of contact disconnection.

[0043] The utility model is tested through simulation and the results are as follows Figure 7As shown in the suction reaction force curve diagram, in the figure, the contact is disconnected at the position where the armature 53 is displaced by 0.5mm, and the contact position between the reaction piece 3 and the rigid dynamic spring 12 is reached at the position where the armature 53 is displaced by 1mm; the arc curve is the suction force curve of the present invention, and the broken line is the reaction force curve. Scheme 1 is the reaction force curve of the relay in the prior art (orange line), and Scheme 2 is the reaction force curve of the present invention (blue line). On the basis of the existing structure, a reaction piece 3 with a thickness of 0.18mm is added, and the angle of the reaction spring 14 is adjusted. The resultant force formed by the reaction spring 14 and the reaction piece 3 is the contact closing pressure, and the contact closing pressure is optimally adjusted to between 1.3N and 1.5N.

[0044] Therefore, the reaction piece, reaction spring and restoration spring of the present invention together constitute a reaction force system. In the process of the contact from closing to opening, the reaction piece only acts in the first half of the disconnection stage. Unlike the restoration spring, the reaction piece provides a staged force, which speeds up the disconnection speed. Not only does it extinguish the arc generated by the contact disconnection quickly, but it also significantly improves the electrical durability of the relay. It also has no effect on the operating voltage and does not need to increase the power consumption of the coil. In the process of the contact from opening to closing, the reaction piece only acts in the second half of the closing stage. Unlike the restoration spring, the reaction piece provides a staged force. The rigid dynamic spring is only responsible for conducting current and is not responsible for deformation to achieve the dynamic closing pressure of the contact. The dynamic closing pressure of the contact is mainly achieved by the difference between the deformation of the reaction spring and the deformation of the reaction piece.

[0045] Compared with the products in the prior art, the breaking force of the contacts of the present invention is greatly improved, so that the electrical durability of the relay is significantly improved. The normally open contacts can switch a load of 80A, and the contacts will not stick when disconnected.

[0046] The utility model provides an electromagnetic relay for improving the breaking force of contacts, and the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.

[0047] The above embodiments are only used to further illustrate an electromagnetic relay with improved contact breaking force of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the technical solution of the present invention.

Claims

1. An electromagnetic relay for improving contact breaking force, comprising at least one contact assembly, wherein the contact assembly includes a movable spring portion and a stationary spring portion, wherein the movable contact of the movable spring portion corresponds to the stationary contact of the stationary spring portion to achieve contact closing or opening; characterized in that: It also includes a reaction force piece that can be elastically deformed. The reaction force piece is located on the side of the dynamic spring part facing the static spring part, and the dynamic spring part pushes the reaction force piece during the movement in the direction of contact closing, so that the reaction force piece is deformed and stores energy, and the reaction force piece releases energy when the contact is disconnected.

2. The electromagnetic relay with enhanced contact breaking force according to claim 1, characterized in that: It also includes a base, the reaction member is independent of the contact assembly and is installed on the base; the dynamic spring part and the static spring part are respectively installed on the base.

3. The electromagnetic relay with enhanced contact breaking force according to claim 2, characterized in that: The reaction member includes a fixed portion and a deformable portion provided on the fixed portion, the fixed portion is mounted on the base, and the deformable portion faces the dynamic spring portion and cooperates with the dynamic spring portion.

4. The electromagnetic relay with enhanced contact breaking force according to claim 3, characterized in that: The reaction member is a spring leaf structure, one end of the deformable portion is fixed together with one end of the fixed portion, the other end of the fixed portion extends downward, and the other end of the deformable portion extends downward at an angle and approaches the dynamic spring portion and cooperates with the dynamic spring portion.

5. The electromagnetic relay with enhanced contact breaking force according to claim 3, characterized in that: The portion where the deformation portion cooperates with the dynamic spring portion is an arc portion, and the convex arc surface of the arc portion faces the dynamic spring portion. During the contact closing or opening process, the convex arc surface of the arc portion forms a tangential motion with the surface of the dynamic spring portion.

6. The electromagnetic relay with enhanced contact breaking force according to claim 3, characterized in that: The base is provided with a retaining wall on a side of the static spring part facing away from the dynamic spring part, the fixing portion of the reaction force piece is installed on the retaining wall, and the reaction force piece is located above the static contact point.

7. The electromagnetic relay with enhanced contact breaking force according to claim 6, characterized in that: The retaining wall is provided with a slot, the fixing portion is inserted into the slot, and the two are in interference fit.

8. The electromagnetic relay with enhanced contact breaking force according to claim 7, characterized in that: The fixing part is provided with a positioning rib for tightly fitting with the groove wall of the slot; the fixing part is provided with a limiting protrusion on one side of its insertion direction, and the two opposite sides of the limiting protrusion are respectively provided with anti-retraction hooks, and the retaining wall is provided with a limiting hole corresponding to the limiting protrusion, the limiting hole is connected to the slot, the limiting protrusion is inserted into the limiting hole, and the anti-retraction hook is stuck in the limiting hole.

9. The electromagnetic relay with enhanced contact breaking force according to any one of claims 2 to 8, characterized in that: There are multiple groups of contact assemblies, which are distributed in parallel, and the distribution direction of the multiple groups of contact assemblies is consistent with the matching direction of the moving contacts and the static contacts; there are multiple reaction force pieces, which correspond one-to-one to the dynamic spring parts of the multiple groups of contact assemblies; the dynamic spring parts and the reaction force pieces are respectively laterally inserted into the base.

10. The electromagnetic relay with enhanced contact breaking force according to claim 2, characterized in that: It also includes a magnetic circuit part, which is installed on the base. The magnetic circuit part includes an armature and a yoke. The armature is rotatably arranged at the edge of the yoke, and a restoring spring is arranged between the armature and the yoke to drive the armature to reset; the armature is connected to the dynamic spring part through a push card.

11. The electromagnetic relay with enhanced contact breaking force according to claim 10, characterized in that: The dynamic spring part includes a dynamic spring lead-out piece, a rigid dynamic spring piece and a reaction force spring piece. The dynamic spring lead-out piece is installed on the base. The upper end of the rigid dynamic spring piece is rotatably connected to the upper end of the dynamic spring lead-out piece, and a flexible conductive part is connected between the upper end of the rigid dynamic spring piece and the upper end of the dynamic spring lead-out piece. The rigid dynamic spring piece is located on the side of the dynamic spring lead-out piece facing the static spring part; the dynamic contact is provided at the lower end of the rigid dynamic spring piece, and the reaction force spring piece is provided on the rigid dynamic spring piece and is located on the side of the rigid dynamic spring piece facing away from the static spring part; the reaction force piece is located on the side of the rigid dynamic spring piece facing the static spring part; the push card connects the reaction force spring piece and the rigid dynamic spring piece.

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