A moving contact assembly and electromagnetic relay

Abstract

The application provides a moving contact assembly and an electromagnetic relay with the moving contact assembly, which comprises a moving spring plate, a moving contact arranged on one surface of the moving spring plate, and a damping structure arranged on the other surface of the moving spring plate. The damping structure comprises at least one set of elastic arm groups. Each set of the elastic arm groups comprises at least two elastic arms. The elastic arms have one side close to the moving spring plate as a starting end and the other side far from the moving spring plate as a terminal end. At least two elastic arms in the elastic arm group are inclined from the starting end to the terminal end, and the inclined directions of the two elastic arms are opposite to each other, so that the two elastic arms cross each other. When the moving contact and the static contact are in contact, the highest points of the elastic arms of the elastic arm group are kept a certain distance from the base of the relay. When the moving contact and the static contact are separated, the elastic arms of the elastic arm group abut against the base of the relay to damp. In this way, the spring plate can be effectively buffered and damped, the spring plate can be reduced to shake, and the repeated arc situation of the contact piece can be improved.

Description

Technical Field

[0001] This invention relates to the technical field of relays, and more particularly to a moving contact assembly and an electromagnetic relay. Background Technology

[0002] An electromagnetic relay is an automatic switching component. A typical structure of an electromagnetic relay includes an electromagnetic system and a contact system. The electromagnetic system includes an armature, a permanent magnet, a yoke, and an iron core. The contact system includes a moving contact portion and a corresponding stationary contact portion. The moving contact portion includes a moving spring and a moving contact mounted on the moving spring. The moving contact portion is connected to the armature of the electromagnetic system. The electromagnetic system controls the movement of the armature to drive the moving contact to make contact with or separate from the stationary contact portion, thereby switching between a self-holding state where the contacts are in contact and a return state where the contacts are separated, thus realizing the on / off state.

[0003] During contact breaking, secondary arcing can easily occur due to the vibration of the moving spring. Current technology often uses shims to increase the rigidity of the spring during the separation of the moving and stationary contacts, thus achieving a certain vibration reduction effect. However, with technological advancements, the market demands higher performance from relays; simply adding shims is insufficient for vibration reduction and does not effectively prevent repeated arcing of the contacts, failing to meet market requirements. Summary of the Invention

[0004] Therefore, the present invention provides a moving contact assembly and an electromagnetic relay, which can effectively buffer and reduce vibration, reduce spring vibration, improve the repeated arcing of contact components, and enhance product performance.

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0006] A moving contact assembly includes a moving spring, a moving contact disposed on one side of the moving spring to correspond and cooperate with a stationary contact assembly; and a vibration damping structure disposed on the other side of the moving spring. The vibration damping structure includes at least one set of elastic arms, each set comprising at least two elastic arms. Each elastic arm has a starting end near the moving spring and a terminal end away from the moving spring. Two of the elastic arms in the set are inclined from the starting end to the terminal end in opposite directions, so that they intersect each other. When the moving contact and the stationary contact are in contact, a certain distance is maintained between the highest point of the elastic arm in the set and the base of the relay. When the moving contact and the stationary contact are separated, the elastic arm in the set abuts against the base of the relay to dampen vibration.

[0007] Furthermore, the multiple elastic arms of each elastic arm group provide progressive vibration damping from the end of the moving spring towards the center.

[0008] Furthermore, the vertical height from the highest point of each of the multiple elastic arms in each elastic arm group to the moving spring decreases sequentially from the end of the moving spring towards the middle position.

[0009] Furthermore, the vibration damping structure includes a pad, one side of which is attached to the tail of the contact on the moving spring, away from the moving contact. The elastic arm assembly is located on the other side of the pad. When the moving contact and the stationary contact are separated, the pad and the elastic arm assembly work together to dampen vibration.

[0010] Furthermore, the gasket has a U-shaped notch, the two sides of the U-shaped notch have different lengths, and the intersecting elastic arms in the elastic arm assembly are portions that extend obliquely from the ends of the two sides of the U-shaped notch to the other side.

[0011] Furthermore, the number of elastic arm groups is two, which are respectively arranged on the corresponding sides of the moving spring along the width direction or the length direction.

[0012] Furthermore, the elastic arm extends along the length of the movable spring, wherein the beginning of one of the two intersecting elastic arms that first abuts against the base of the relay is closer to the middle of the movable spring, while the beginning of the other elastic arm is closer to the end of the movable spring.

[0013] Furthermore, the end of the elastic arm is provided with a bent portion, which bends toward the side where the moving spring is located, and the highest point of the elastic arm is located at the bend of the bent portion.

[0014] Furthermore, the moving spring is composed of multiple springs stacked together, and the vibration damping structure is located on the spring furthest from the moving contact.

[0015] The present invention also provides an electromagnetic relay, including a contact system and a base, the base for accommodating the contact system; the contact system includes a moving contact assembly and a stationary contact assembly, the moving contact assembly being the moving contact assembly described above.

[0016] The technical solution provided by this invention has the following beneficial effects:

[0017] The present invention is provided with a vibration damping structure, which achieves the function of buffering and vibration damping through at least two intersecting elastic arms on the vibration damping structure; and the elastic arms are arranged in opposite directions to make full use of the effective space, making the arm length of the elastic arms longer, increasing flexibility, increasing the elastic deformation of the elastic arms, and improving the vibration damping effect.

[0018] Secondly, the multiple elastic arms of each elastic arm group gradually reduce vibration from the end of the moving spring to the middle position, so as to achieve the effect of multi-stage vibration reduction. This can effectively prevent the risk of secondary arcing caused by spring vibration during the contact break and prevent instantaneous sticking during the process. It also reduces the loss of silver content in the contacts, increases the electrical life of the relay, or meets the requirements of cost reduction.

[0019] Furthermore, the vibration damping structure of the present invention includes a pad and an elastic arm assembly. That is, the elastic arm assembly is integrated into the pad, so that on the basis of the pad's original characteristic of increasing the rigidity when the moving spring breaks, the elastic arm assembly further enhances the flexibility during vibration damping, resulting in a better vibration damping and stopping effect.

[0020] Finally, in the vibration damping structure, the starting end of one of the two intersecting elastic arms that first abuts against the base of the relay is closer to the middle of the moving spring, while the starting end of the other elastic arm is closer to the end of the moving spring. In this way, the middle of the moving spring is first damped to stop vibration, and then further damping is performed at the end of the moving spring to improve the stopping effect. Attached Figure Description

[0021] Figure 1 The diagram shown is a structural schematic of Embodiment 1 of the present invention;

[0022] Figure 2 The image shown is a side view of Embodiment 1 of the present invention;

[0023] Figure 3 As shown Figure 2 A magnified view of a portion of the image;

[0024] Figure 4 The diagram shown is a structural schematic of the contact system according to Embodiment 1 of the present invention;

[0025] Figure 5 The diagram shown is a schematic representation of the connection between the moving spring and the vibration damping structure in Embodiment 1 of the present invention.

[0026] Figure 6 The figure shown is a top view of the moving spring and vibration damping structure according to Embodiment 1 of the present invention;

[0027] Figure 7 The diagram shown is a structural schematic of the vibration reduction structure according to Embodiment 1 of the present invention;

[0028] Figure 8 The image shown is a side view of the moving spring and vibration damping structure according to Embodiment 1 of the present invention;

[0029] Figure 9 The diagram shown is a structural schematic of the vibration reduction structure according to Embodiment 2 of the present invention;

[0030] Figure 10 The image shown is a side view of the vibration reduction structure according to Embodiment 2 of the present invention.

[0031] Label Explanation:

[0032] 100-Electromagnetic system, 101-Armature, 200-Contact system, 201-Moving contact assembly, 202-Static contact assembly, 20-Moving spring, 30-Moving contact, 40-Moving spring lead-out piece, 50-Static spring, 60-Static contact, 300-Base, 301-Upper cavity, 302-Lower cavity, 400-Push card;

[0033] 10-Vibration damping structure, 1-Elastic arm assembly, 11-Elastic arm, 111-First elastic arm, 112-Second elastic arm, 113-Third elastic arm; 110-Bending part, 2-Shim. Detailed Implementation

[0034] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0035] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] Reference Figures 1 to 8 As shown, this embodiment provides an electromagnetic relay, including an electromagnetic system 100, a contact system 200, a base 300, and a push card 400. The internal space of the base 300 is divided into an upper cavity 301 and a lower cavity 302. The electromagnetic system 100 and the contact system 200 are respectively disposed in the upper cavity 301 and the lower cavity 302 of the base 300. The electromagnetic system 100 includes components such as an armature 101, a permanent magnet, a yoke, and an iron core; the contact system 200 includes a moving contact assembly 201 and a stationary contact assembly 202; the armature 101 of the electromagnetic system 100 is connected to the moving contact assembly 201 of the contact system 200 by a pusher 400, thereby controlling the movement of the armature 101 to drive the moving contact 30 of the moving contact assembly 201 to contact or separate from the stationary contact 60 of the stationary contact assembly 202, thereby switching between a self-holding state of contact and a return state of contact separation to achieve on / off.

[0038] Specifically, see Figures 2 to 6As shown, the moving contact assembly 201 includes a moving spring 20, a moving contact 30 disposed on the moving spring 20, a vibration damping structure 10, and a moving spring lead-out piece 40; the stationary contact assembly 202 includes a stationary spring 50 and a stationary contact 60 disposed on the stationary spring 50; wherein, the moving contact 30 is disposed on one side of the moving spring 20 to correspond and cooperate with the stationary contact 60 of the stationary contact assembly 202; the vibration damping structure 10 is disposed on the other side of the moving spring 20 to dampen vibration when the moving contact 30 and the stationary contact 60 are separated. In this embodiment, the end of the moving spring 20 away from the moving contact 30 is fixedly connected to the moving spring lead-out piece 40, and the moving spring lead-out piece 40 and the washer are disposed on opposite sides of the moving spring 20.

[0039] See Figure 7 As shown, the vibration damping structure 10 includes at least one set of elastic arm groups 1, each containing at least two elastic arms 11. Each elastic arm 11 begins on the side closest to the moving spring 20 and ends on the side furthest from the moving spring 20. At least two elastic arms 11 tilt from their beginnings to their ends in opposite directions, allowing them to intersect. When the moving contact 30 and the stationary contact 60 are in contact, a certain distance is maintained between the highest point of the elastic arm 11 and the base 300 of the relay. When the moving contact 30 and the stationary contact 60 separate, the elastic arm 11 first abuts against the base 300 of the relay for vibration damping. During the separation of the moving contact 30 and the stationary contact 60, each elastic arm 11 abuts against the base 300, causing elastic deformation and consuming the kinetic energy of the moving spring 20, thus slowing down the moving spring 20 and achieving a buffering and vibration damping effect. Furthermore, the use of reverse intersecting arms 11 can make full use of the available space, resulting in a longer arm length for the elastic arms 11, increasing flexibility, increasing the elastic deformation of the elastic arms 11, and improving the vibration reduction effect.

[0040] In this embodiment, the number of elastic arm groups 1 can be set to two, three, or more groups according to the different relay requirements for spring return control. When the number of elastic arm groups 1 is set to two groups, the two groups of elastic arm assemblies 1 are respectively arranged on the corresponding sides of the moving spring 20 along the width or length direction to improve the vibration reduction effect and ensure the force balance on the left and right sides of the moving spring 20. In other embodiments, the number of elastic arm groups 1 can also be three groups, with the first and second groups of elastic arm groups 1 symmetrically arranged on both sides of the moving spring 20 along the width direction; the third group of elastic arm groups 1 is located at the rear end of the two groups of elastic arm groups 1, closer to the middle position of the moving spring 20, and the third group of elastic arm groups 1 is arranged between the first and second groups of elastic arm groups 1 in the width direction of the moving spring 20; or the number of elastic arm groups 1 can also be four groups, symmetrically arranged in pairs in the length or width direction of the moving spring 20 to enhance the vibration reduction effect. This article does not limit the number of elastic arm groups 1. The number of elastic arms 11 in each elastic arm group 1 can be set differently according to the requirements of different relays for spring return control, and this document does not impose any restrictions. In this embodiment, the number of elastic arm groups 1 is set to two groups, and the two groups of elastic arm assemblies 1 are respectively set on both sides of the moving spring 20 along the width direction. Each elastic arm group 1 is provided with two elastic arms 11, and the two elastic arms 11 intersect each other as an example for illustration.

[0041] In each elastic arm group 1, multiple elastic arms 11 provide progressive vibration damping from the end to the center of the movable spring 20. Different contact positions between the push card 400 and the movable spring 20 result in slight differences in the deformation process of the movable spring 20, thus slightly altering the vibration damping structure of the elastic arms 11. The vibration damping requirements of different products can be better adapted by adjusting the parameter settings of the elastic arms 11. This manual lists two common pushing methods: specifically, the contact position between the push card 400 and the movable spring 20 can be either at the end or at the center. (See reference...) Figure 1 exist Figure 2 As shown, when the push card 400 engages with the end of the movable spring 20 near the movable contact 30, the movable spring 20 swings with the end away from the movable contact 30 as the fulcrum during the breaking process (the side of the movable spring 20 away from the contact is fixedly connected to the movable spring lead-out piece 40). That is, the swing range of the movable spring 20 is roughly "V" shaped. The end of the movable spring 20 closer to the movable contact 30 will abut against the base 300 earlier. Correspondingly, the multiple elastic arms 11 of the elastic arm group 1 abut against the base 300 in a sequential order. The elastic arm 11 whose end is closer to the end of the movable spring 20 abuts against the base 300 earlier. In this way, the multiple elastic arms 11 of each elastic arm group 1 achieve a step-by-step vibration reduction effect from the end of the movable spring 20 to the middle position, effectively reducing the spring rebound and reducing the action bounce.

[0042] When the push card 400 engages with the middle of the movable spring 20, the pivot point of the movable spring 20 becomes the contact point between the push card 400 and the movable spring 20. Thus, the sequence of contact between the multiple elastic arms 11 of the elastic arm group 1 located at one end of the movable spring 20 and the base 300 is not significantly different, resulting in a weak step-by-step vibration reduction effect. In this case, the vertical height from the highest point of each elastic arm 11 of the elastic arm group 1 to the movable spring 20 can be differentiated to achieve a step-by-step vibration reduction effect from the end to the middle of the movable spring 20. Of course, differentiating the vertical height from the highest point of each elastic arm 11 of the elastic arm group 1 to the movable spring 20 also applies to the case where the push card 400 engages with the end of the movable spring 20, to further improve the step-by-step vibration reduction effect of the multiple elastic arms 11.

[0043] In this embodiment, the vertical height from the highest point of each elastic arm 11 in each elastic arm group 1 to the moving spring 20 decreases progressively from the end to the middle of the moving spring 20 to achieve a gradual vibration reduction effect. For details, please refer to... Figure 8 As shown, the elastic arm 11 with the highest vertical height from its highest point to the movable spring 20 is defined as the first elastic arm 111, and the vertical height from the first elastic arm 111 to the movable spring 20 is defined as h1; at this time, the end of the first elastic arm 111 is closer to the end of the movable spring 20. The elastic arm 11 with a vertical height from its highest point to the movable spring 20 that is slightly lower than h1 is defined as the second elastic arm 112, and the vertical height from the second elastic arm 112 to the movable spring 20 is defined as h2; at this time, the end of the second elastic arm 112 is closer to the middle of the movable spring 20. During the breaking process of the moving contact 30 and the stationary contact 60, the first elastic arm 111 first abuts against the base 300. Through the elastic deformation of the first elastic arm 111, the rebound speed of the moving spring 20 is slowed down, and the kinetic energy of the moving spring 20 is effectively consumed, thus achieving the first stage of vibration reduction. Subsequently, the second elastic arm 112 abuts against the base 300. Through the elastic deformation of the second elastic arm 112, the kinetic energy of the moving spring 20 is further consumed, thus achieving the second stage of vibration reduction. By setting multiple elastic arms 11 and making the vertical height from the highest point of the multiple elastic arms 11 to the moving spring 20 decrease from the end of the moving spring 20 to the middle position, the effect of multi-stage progressive vibration reduction can be achieved. This can effectively prevent the risk of secondary arcing caused by spring vibration during the breaking process between contacts and prevent instantaneous sticking during the process.

[0044] Furthermore, the elastic arm 11 extends along the length of the movable spring 20, wherein the starting end of one of the two intersecting elastic arms 11 that first abuts against the base 300 of the relay is closer to the middle of the movable spring 20, while the starting end of the other elastic arm 11 is closer to the end of the movable spring 20. Specifically, see [reference needed]. Figures 2 to 3 As shown, the elastic arm 11 that first abuts against the base 300 of the relay, i.e., the first elastic arm 111, has its starting end closer to the middle position of the moving spring 20. The elastic arm 11 that later abuts against the base 300 of the relay, i.e., the second elastic arm 112, has its starting end closer to the end of the moving spring 20. In this way, during the breaking process of the moving contact 30 and the stationary contact 60, the elastic arm group 1 first acts on the middle position of the moving spring 20, and then acts on the end of the moving spring 20. This first damping is performed at the middle position, and then further transitions to the head position for damping, resulting in a better damping and stopping effect.

[0045] Specifically, see Figure 7 As shown, each elastic arm 11 has a bent portion 110 at its end, which bends towards the side where the moving spring 20 is located. The highest point of the elastic arm 11 is located at the bend of the bent portion 110. In this way, when the moving contact 30 and the stationary contact 60 are separated, the part of the elastic arm 11 that abuts against the base 300 is in arc-shaped surface contact, which can reduce the collision damage between the elastic arm 11 and the partition plate and improve the service life of the product.

[0046] In this embodiment, the vibration damping structure 10 also includes a gasket 2. One side of the gasket 2 is attached to the tail of the contact on the moving spring 20, away from the moving contact 30. The elastic arm assembly 1 is located on the other side of the gasket 2. When the moving contact 30 and the stationary contact 60 separate, the gasket 2 and the elastic arm assembly 1 work together to dampen vibration. The gasket 2 added to the moving spring 20 helps to enhance the rigidity of the moving spring 20, improving the breaking effect at the moment of separation between the moving contact 30 and the stationary contact 60 and reducing the risk of contact adhesion. Simultaneously, the gasket 2 itself also provides excellent vibration damping for the moving spring 20. Combined with the elastic arm assembly 1, it further strengthens the buffering and vibration damping effect when the moving contact 30 and the stationary contact 60 separate. That is, this embodiment integrates rigid breaking and flexible vibration damping functions. The gasket 2 increases the rigidity of the moving spring 20 during breaking, while the integrated reverse-crossing elastic arm assembly 1 improves the flexibility during vibration damping, thereby greatly increasing the electrical lifespan of the relay. The washer 2 has a through hole at its center for mounting the moving contact 30, and the moving spring 20 also has a mounting hole. One end of the moving contact 30 passes through the mounting hole on the moving spring 20 and the through hole on the washer 2, and the three are fixed together by welding. Alternatively, the washer 2 can be integrally formed with the moving spring 20, that is, the washer 2 is directly formed by folding the same material during the production of the moving spring 20, without the need for riveting. Preferably, the size of the washer 2 only covers the contact position on the moving spring 20, that is, the location of the mounting hole of the moving spring 20, which is more targeted and can reduce the impact on the required motion flexibility of the moving spring 20.

[0047] In this embodiment, the gasket 2 has a U-shaped notch with different lengths on both sides. The two elastic arms 11 are portions that extend obliquely from the ends of the U-shaped notch to the other side, thus ensuring that the gasket 2 and the elastic arm assembly 1 are integrally formed, facilitating processing. Of course, in other embodiments, the gasket 2 can also be a single-piece structure, and the elastic arm 11 can be a single-piece structure with outwardly obliquely extending support arms; this is not a limitation herein.

[0048] Alternatively, in other embodiments, the movable spring 20 is composed of multiple springs stacked together, and the elastic arm assembly 1 is directly disposed on the spring furthest from the movable contact 30. This is not a limitation herein.

[0049] Example 2

[0050] See Figures 9 to 10As shown, the electromagnetic relay provided by the present invention also includes an electromagnetic system 100, a contact system 200, a base 300, and a push card 400. Embodiment 2 has a structure largely the same as Embodiment 1, except that the number of elastic arms 11 in the elastic arm group 1 is different. In this embodiment, a set of elastic arm groups 1 is provided on both sides of the gasket 2, and each set of elastic arm groups 1 has three elastic arms 11. The three elastic arms 11 are the first elastic arm 111, the second elastic arm 112, and the third elastic arm 113. The first elastic arm 111 and the second elastic arm 112 have the same tilt direction but different tilt angles, while the third elastic arm 113 has a tilt direction opposite to that of the first elastic arm 111 and the second elastic arm 112. The first elastic arm 111 and the second elastic arm 112 intersect each other, so that during the breaking process of the moving contact 30 and the stationary contact 60, each elastic arm 11 abuts against the base 300, and the elastic arm 11 generates elastic deformation, which consumes the kinetic energy of the moving spring 20 to decelerate the moving spring 20, thereby achieving a buffering and vibration reduction effect. Moreover, the three intersecting elastic arms 11 can make full use of the effective space, making the arm length of the elastic arm 11 longer, increasing flexibility, increasing the elastic deformation of the elastic arm 11, and improving the vibration reduction effect.

[0051] Furthermore, the vertical height from the highest point of the three elastic arms 11 to the moving spring 20 decreases progressively from the end of the moving spring 20 towards the middle. Specifically, the first elastic arm 111, whose end is closest to the moving spring 20, has the largest vertical height among the three; the second elastic arm 112, whose end is closest to the moving spring 20, has the second largest vertical height; and the third elastic arm 113, whose end is furthest from the moving spring 20, has the smallest vertical height. During the breaking process of the moving contact 30 and the stationary contact 60, the first elastic arm 111 first abuts against the base 300. Through the elastic deformation of the first elastic arm 111, the rebound speed of the moving spring 20 is slowed down, and the kinetic energy of the moving spring 20 is effectively consumed, thus achieving the first stage of vibration reduction. Subsequently, the second elastic arm 112 abuts against the base 300. Through the elastic deformation of the second elastic arm 112, the kinetic energy of the moving spring 20 is further consumed, thus achieving the second stage of vibration reduction. Finally, the third elastic arm 113 abuts against the base 300. Through the elastic deformation of the third elastic arm 113, the kinetic energy of the moving spring 20 is further consumed, thus achieving the third stage of vibration reduction. This achieves a three-stage vibration reduction effect.

[0052] In this embodiment, the starting end of the third elastic arm 113 is closer to the end of the moving spring 20, while the starting ends of the first elastic arm 111 and the second elastic arm 112 are closer to the middle of the moving spring 20. Thus, during the separation of the moving contact 30 and the stationary contact 60, the structure of the pad 2 riveted to the back of the moving contact 30 increases the rigidity of the head of the moving spring 20, aiding in the separation. Furthermore, the integrated reverse-crossing elastic arm group 1 of the pad 2 provides a flexible vibration damping effect. In addition, the first elastic arm 111 and the second elastic arm 112 first act on the position relatively close to the middle of the moving spring 20, and then the third elastic arm 113 acts on the end of the moving spring 20, first damping the position near the middle, and then further transitioning to damping the head at that position, resulting in a better vibration damping and stopping effect.

[0053] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A moving contact assembly, characterized in that: The device includes a movable spring, a movable contact on one side of the movable spring for corresponding engagement with the stationary contact of a stationary contact assembly, and a vibration damping structure on the other side of the movable spring. The vibration damping structure includes at least one set of elastic arms, each set comprising at least two elastic arms. Each elastic arm has a starting end near the movable spring and a ending end away from the movable spring. At least two elastic arms in the set are inclined from their starting ends to their ending ends in opposite directions, intersecting each other. When the movable and stationary contacts are in contact, a certain distance is maintained between the highest point of each elastic arm in the set and the base of the relay. When the movable and stationary contacts are separated, the elastic arms of the set abut against the base of the relay for vibration damping. Each elastic arm in the elastic arm group provides progressive vibration damping from the end of the moving spring towards the center, with each elastic arm extending along the length of the moving spring.

2. The moving contact assembly according to claim 1, characterized in that: The vertical height from the highest point of each elastic arm in each elastic arm group to the moving spring decreases sequentially from the end of the moving spring towards the middle.

3. The moving contact assembly according to claim 1, characterized in that: The vibration damping structure includes a pad, one side of which is attached to the tail of the contact on the moving spring, away from the moving contact. The elastic arm assembly is located on the other side of the pad. When the moving contact and the stationary contact are separated, the pad and the elastic arm assembly work together to dampen vibration.

4. The moving contact assembly according to claim 3, characterized in that: The gasket has a U-shaped notch with different lengths on both sides. The intersecting elastic arms in the elastic arm assembly are portions that extend obliquely from the ends of the two sides of the U-shaped notch to the other side of the side with the end relative to the U-shaped notch.

5. The moving contact assembly according to claim 1, characterized in that: The number of elastic arm groups is two, which are respectively located on the corresponding sides of the moving spring along the width direction or the length direction.

6. The moving contact assembly according to claim 1, characterized in that: Of the two intersecting elastic arms, the beginning of the one that first abuts against the base of the relay is closer to the middle of the moving spring, while the beginning of the other elastic arm is closer to the end of the moving spring.

7. The moving contact assembly according to claim 1, characterized in that: The end of the elastic arm is provided with a bending portion, which bends toward the side where the moving spring is located, and the highest point of the elastic arm is located at the bend of the bending portion.

8. The moving contact assembly according to claim 1, characterized in that: The moving reed is composed of multiple reeds stacked together, and the vibration damping structure is located on the reed furthest from the moving contact.

9. An electromagnetic relay, characterized in that: It includes a contact system and a base for housing the contact system; the contact system includes a moving contact assembly and a stationary contact assembly, the moving contact assembly being the moving contact assembly according to any one of claims 1-8.

Images