Movable spring assembly and relay

Abstract

The utility model provides a movable spring assembly and a relay. The movable spring assembly comprises a movable spring leading-out pin, a contact movable spring sheet and a movable contact. The contact section of the contact movable contact spring is arranged in a forked mode so as to form a first forked part and a second forked part which are arranged in a spaced mode in the width direction of the contact movable contact spring, and a pushing part is formed at the tail end of the first forked part; the movable contact is arranged on the second branch part and deviates from the center line position of the contact end in the direction deviating from the first branch part; and a pulling part is formed at the tail end of the second branch part. When the switch is matched with the relay, the effects of flexible closing and rigid breaking between contacts can be realized, and the small size of the product is realized while the reliable action performance of the contacts is ensured.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a dynamic spring component and a relay. Background Art

[0002] A relay is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) reaches the specified requirement. It has an interactive relationship between the control system (also called the input circuit) and the controlled system (also called the output circuit).

[0003] Relays generally include a magnetic circuit part and a contact part. The magnetic circuit part drives the moving spring of the contact part to perform opening and closing operations. In some relays, the armature assembly of the magnetic circuit part is connected to the moving spring through a push card. When the push card and the moving spring are assembled, the moving spring is directly inserted into the push card. Although basic opening and closing operations can be achieved, the moving contact and the static contact are rigidly closed, the vibration is large, and the moving contact is prone to rebound, which increases the generation of arcs and easily burns the contacts. Utility Model Content

[0004] Therefore, in order to solve the above problems, the utility model provides a dynamic spring assembly and a relay.

[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0006] A dynamic spring assembly comprises a dynamic spring lead-out pin, a contact dynamic spring sheet fixed on the dynamic spring lead-out pin, and a dynamic contact point arranged on the contact dynamic spring sheet; the portion of the contact dynamic spring sheet away from the dynamic spring lead-out pin is defined as a contact section, the contact section of the contact dynamic spring sheet is forked to form a first forked portion and a second forked portion spaced apart along the width direction of the contact dynamic spring sheet, the end of the first forked portion forms a pushing portion; the dynamic contact point is arranged on the second forked portion and deviates from the midline position of the contact section in a direction away from the first forked portion; the end of the second forked portion forms a pulling portion.

[0007] Furthermore, the width of the second bifurcated portion is greater than the width of the first bifurcated portion.

[0008] A relay includes a magnetic circuit part and a contact part. The contact part includes a static reed assembly and a moving reed assembly. The armature assembly of the magnetic circuit part is connected to the moving reed assembly through a pushing card; the moving reed assembly is the moving reed assembly described above; the static reed assembly includes a static reed and a static contact arranged on the static reed and corresponding to the moving contact; the pushing card is provided with a pushing card slot and a relief recess. The relief recess has a first side wall facing away from the static reed assembly and a second side wall facing the static reed assembly; the pushing part of the contact moving reed is fitted in the pushing card slot of the pushing card, and the pulling part of the contact moving reed is fitted in the relief recess of the pushing card. The pulling part is close to the first side wall of the relief recess and maintains a relief distance from the second side wall; when the pushing card moves in the closing direction, the pushing part of the first bifurcated part is pushed to drive the moving contact on the second bifurcated part to perform a closing action; when the pushing card moves in the opening direction, the pulling part on the second bifurcated part is pulled by the first side wall of the relief recess to drive the moving contact to perform an opening action.

[0009] Further, in the width direction, the first bifurcated part and the second bifurcated part of the contact moving reed are arranged in alignment without external force; when the pushing card drives the moving reed assembly to complete closing, the first bifurcated part is driven by the pushing card to deform towards the static reed assembly, and the deformation position of the first bifurcated part does not exceed the static reed assembly.

[0010] Further, it further includes a base. The magnetic circuit part and the contact part are both assembled on the base. The width direction of the contact moving reed is perpendicular to the base, so that the first bifurcated part and the second bifurcated part of the contact moving reed are distributed vertically.

[0011] Further, at least one side of the pushing part of the first bifurcated part is laterally bent to form an arc section for preventing chip scraping.

[0012] Further, the number of the contact parts is two groups. The two groups of contact parts are distributed on the left and right sides of the magnetic circuit part. The armature assembly of the magnetic circuit part is connected to the moving reed assemblies of the two groups of contact parts through a pushing card at the same time; arc sections for preventing chip scraping are formed by laterally bending both the upper and lower sides of the pushing part of the first bifurcated part; the pushing part of the first bifurcated part is fitted in the pushing card slot of the pushing card and forms a vertical limit.

[0013] It further includes an auxiliary contact. The auxiliary contact is assembled on the base and forms a cooperation with the lower side of the pushing card; the armature assembly synchronously drives the auxiliary contact to perform opening and closing actions through the pushing card.

[0014] Further, the number of contact moving reed pieces of the moving reed assembly is at least two, which are arranged at intervals up and down. The second bifurcated parts of the contact sections of at least two contact moving reed pieces are all located below the first bifurcated part. At least two static contacts are arranged on the static reed to respectively correspond to the moving contacts on at least two contact moving reed pieces. At least two groups of pushing grooves and relief recesses are arranged on the pushing card to respectively cooperate with the pushing parts and pulling parts of at least two contact moving reed pieces.

[0015] Further, define the part where the contact moving reed piece is fixed to the moving reed lead-out foot as the fixed section. The fixed sections of at least two contact moving reed pieces are of an integral connection structure.

[0016] Further, define the part where the contact moving reed piece is fixed to the moving reed lead-out foot as the fixed section. The width of the fixed section of the contact moving reed piece is smaller than that of the contact section. The upper side of the fixed section of the upper contact moving reed piece is flush with the upper side of the contact section. The lower side of the contact section of the contact moving reed piece protrudes from the fixed section. A relief notch is arranged on the moving reed lead-out foot to make way for the contact section of the lower contact moving reed piece.

[0017] Further, the moving reed assembly further includes a current-carrying reed piece, and the current-carrying reed piece is fixedly attached to one side of the contact moving reed piece.

[0018] Further, the end of the current-carrying reed piece is bent and abuts against the pushing card.

[0019] Through the technical solution provided by the present utility model, the following beneficial effects are achieved:

[0020] The contact section of the contact moving reed piece is bifurcated, forming a first bifurcated part and a second bifurcated part arranged at intervals in the width direction of the contact moving reed piece. The end of the first bifurcated part forms a pushing part, and the end of the second bifurcated part forms a pulling part. When applied to a relay, when the pushing card moves in the closing direction, the pushing part of the first bifurcated part is pushed to drive the moving contact on the second bifurcated part to perform a closing action, realizing flexible closing, which can close and reduce vibration, and reduce the bounce of the product. When the pushing card moves in the opening direction, the pulling part on the second bifurcated part is pulled by the first side wall of the relief recess to drive the moving contact to perform an opening action, realizing rigid breaking between the contacts, ensuring reliable breaking, and ensuring reliable contact action performance.

[0021] At the same time, the moving contact is arranged on the second bifurcated part and deviates from the midline position of the contact section in the direction away from the first bifurcated part. In this way, while ensuring the reliability of the first bifurcated part, the overall width dimension of the contact moving reed piece can be reduced, and a small volume of the product can be realized while ensuring reliable contact action performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1The figure shows a schematic structural view of the moving spring assembly in the embodiment;

[0023] Figure 2 The figure shows a schematic structural view of the upper and lower contact moving spring pieces of the moving spring assembly in the embodiment;

[0024] Figure 3 The figure shows a schematic assembly structure view of the moving spring assembly and the pushing card in the embodiment;

[0025] Figure 4 The figure shows Figure 3 an enlarged view of area A in

[0026] Figure 5 The figure shows a schematic partial structural view of the relay in the embodiment;

[0027] Figure 6 The figure shows Figure 5 an enlarged view of area B in

[0028] Figure 7 The figure shows a top view of the partial structure of the relay in the embodiment;

[0029] Figure 8 The figure shows Figure 7 an enlarged view of area C in

[0030] Figure 9 The figure shows a schematic partial structural view of the relay when it is switched off in the embodiment;

[0031] Figure 10 The figure shows a front view of the relay in the embodiment. Detailed implementation manners

[0032] To further illustrate each embodiment, the present utility model provides drawings. These drawings are a part of the disclosure of the present utility model, and are mainly used to illustrate the embodiments and can be used to explain the operation principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0033] In the description of the present invention, the orientation or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] Now, the present utility model will be further described in conjunction with the drawings and specific implementation manners.

[0035] Embodiment 1

[0036] Referring to Figure 1 、 Figure 2 As shown, a moving contact spring assembly 10 provided in this embodiment includes a moving contact spring lead 11, a contact moving contact spring piece 12 fixed on the moving contact spring lead 11, and a moving contact 15 provided on the contact moving contact spring piece 12. Specifically, as Figure 1 shown, the moving contact spring lead 11 is vertically arranged, the contact moving contact spring piece 12 is fixed on the moving contact spring lead 11 and extends horizontally. The part where the contact moving contact spring piece 12 is fixed on the moving contact spring lead 11 is defined as the fixed section 122, and the part deviating from the moving contact spring lead 11 is defined as the contact section 121. That is, the left section of the contact moving contact spring piece 12 is the fixed section 122, and the right section is the contact section 121. Among them, the contact section 121 of the contact moving contact spring piece 11 is bifurcated to form a first bifurcated part 13 and a second bifurcated part 14 spaced apart in the width direction of the contact moving contact spring piece 12 ( Figure 1 in the up and down direction in the figure), and the second bifurcated part 14 is located below the first bifurcated part 13.

[0037] Specifically, the end of the first bifurcated part 13 forms a pushing part 131; the moving contact 15 is provided on the second bifurcated part 14 and deviates from the midline position a of the contact section 121 in the direction away from the first bifurcated part 13 (i.e., downward); the end of the second bifurcated part 14 forms a pulling part 141.

[0038] Furthermore, the width of the second bifurcated part 14 is greater than the width of the first bifurcated part 13 to ensure that the second bifurcated part 14 has sufficient size to set the moving contact 15.

[0039] Continuing to refer to Figures 3 to 10 shown, this embodiment also provides a relay, which includes a base 30, a magnetic circuit part 40 and a contact part 1 assembled on the base 30. The contact part 1 includes a static contact spring assembly 50 and a moving contact spring assembly. The armature assembly 41 of the magnetic circuit part 40 is connected to the moving contact spring assembly through a pushing card 20. Among them, the moving contact spring assembly is the moving contact spring assembly 10 described above; the moving contact spring assembly 10 is vertically inserted into the base 30, that is, the width direction of the contact moving contact spring piece 12 is perpendicular to the base 30, so that the first bifurcated part 13 and the second bifurcated part 14 of the contact moving contact spring piece 12 are distributed up and down.

[0040] The static contact spring assembly 50 includes a static contact spring 52 and a static contact 51 disposed on the static contact spring 52 and corresponding to the moving contact 15; a pushing groove 21 and a relief recess 22 are provided on the pushing card 20, and the relief recess 22 has a first side wall 221 facing away from the static contact spring assembly 50 and a second side wall 222 facing the static contact spring assembly 50; the pushing portion 131 of the contact moving spring piece 12 is fitted in the pushing groove 21 of the pushing card 20, the pulling portion 141 of the contact moving spring piece 12 is fitted in the relief recess 22 of the pushing card 20, the pulling portion 141 is close to the first side wall 221 of the relief recess 22 and maintains a relief distance from the second side wall 222; the pulling portion 141 being close to the first side wall 221 of the relief recess 22 may be in direct contact with the first side wall 221 or maintain a certain small gap to ensure that the pulling portion 141 is pulled when the pushing card 20 performs a tripping operation; the pulling portion 141 maintaining a relief distance from the second side wall 222 means maintaining a large distance so that the pulling portion 141 and the second side wall 222 do not come into contact when the pushing card 20 performs closing and tripping operations.

[0041] Specifically, when the pushing card 20 moves in the closing direction, the pushing portion 131 of the first bifurcated portion 13 is pushed to drive the moving contact 15 on the second bifurcated portion 14 to perform a closing operation; in this way, the pushing card 20 does not directly act on the second bifurcated portion 14, and a flexible closure is formed between the moving contact 15 and the static contact 51; it has a good damping effect, reduces bounce, and avoids problems such as increased contact resistance and silver layer loss caused by the aggravation of contact erosion due to re-ignition arc. When the pushing card 20 moves in the tripping direction, the pulling portion 141 on the second bifurcated portion 14 is pulled by the first side wall 221 of the relief recess 22 to drive the moving contact 15 to perform a tripping operation. Rigid breaking between the contacts is achieved to ensure reliable breaking; the reliable operation performance of the contacts is ensured.

[0042] Further, the number of the contact moving reed pieces 12 is two, which are distributed at intervals up and down. For both of the two contact moving reed pieces 12, the first bifurcated portion 13 is located above the second bifurcated portion 14. In this way, the distance between the upper and lower moving contact points 15 can be ensured without increasing the distance between the two contact moving reed pieces 12, which is beneficial to reducing the height of the moving reed assembly 10. At the same time, moving contact points 15 are arranged on the second bifurcated portions 14 of the two contact moving reed pieces 12, and the moving contact points 15 all satisfy deviating from the midline position a of the contact section 121 in the direction away from the first bifurcated portion 13 (i.e., downward). Two static contact points 51 are arranged on the static reed 52 to respectively correspond to the moving contact points 15 on the upper and lower contact moving reed pieces 12; two sets of pushing grooves 21 and relief recesses 22 are arranged on the pushing card 20 to respectively cooperate with the pushing portions 131 and pulling portions 141 of the two contact moving reed pieces 12; specifically, in this embodiment, the structures of the two sets of pushing grooves 21 and relief recesses 22 are different, as long as the above-mentioned driving actions can be completed. In this way, the pushing card 20 can drive the two contact moving reed pieces 12 to act synchronously. And by arranging the second bifurcated portion 14 with the moving contact point 15 below the first bifurcated portion 13, the height of the moving contact point 15 can be reduced, and the height of the static contact point 51 on the static reed 52 can also be reduced, synchronously reducing the height of the static reed 52, that is, the height of the static reed 52 does not need to be set too high. While meeting the requirement of small volume, the material of the static reed 52 is reduced, saving costs.

[0043] Since the width of the contact section 121 of the actuating reed piece 12 needs to be maintained at a certain dimension, in order to further reduce the overall height of the moving reed assembly 10, the width of the fixed section 122 of the contact moving reed piece 12 is designed to be smaller than that of the contact section 121; wherein, the upper side of the fixed section 122 of the contact moving reed piece 12 located above is flush with the upper side of the contact section 121; the contact section 121 protrudes downward; and for the contact moving reed piece 12 located below, the upper side of the contact moving reed piece 12 below always maintains an equal distance from the lower side of the contact moving reed piece 12 above, and the upper side of the fixed section 122 of the contact moving reed piece 12 below is higher than the upper side of the contact section 121; in this way, the fixed sections 122 of the upper and lower contact moving reed pieces 12 can be close to each other, and the height of the moving reed lead-out foot 11 does not need to be set too high; and the contact section 121 of the contact moving reed piece 12 below extends downward; at the same time, in order to avoid interference between the contact section 121 of the contact moving reed piece 12 below and the moving reed lead-out foot 11, a relief notch 111 is arranged on the moving reed lead-out foot 11, and the relief notch 111 is an Figure 1 oblique cut section as shown, to make way for the contact section 121 of the contact moving reed piece 12 below; in this way, the overall height of the moving reed assembly 10 can be reduced.

[0044] Further, as Figure 2As shown in the figure, in this embodiment, the fixed sections 122 of the two contact moving spring pieces 12 are integrally connected structures; in this way, the two contact moving spring pieces 12 can be regarded as structures cut from the same piece of material, so that the positions of the upper and lower contact moving spring pieces 12 are fixed and there will be no deviation due to assembly; the reliability is better.

[0045] By arranging the moving spring component 10 as described above, the overall height of the moving spring component 10 can be reduced. When applied to a relay, it can well reduce the overall height of the relay and meet the design concept of small volume and compactness.

[0046] Furthermore, in this embodiment, in the width direction, the first bifurcated portion 13 and the second bifurcated portion 14 of the contact moving spring piece 12 are arranged to be aligned with each other without external force. In this way, when assembling, the contact moving spring piece 12 is a straight piece with an equal thickness, which is beneficial to reducing the assembly difficulty and improving the assembly efficiency. When the pushing card 20 drives the moving spring component 10 to complete closing, as Figure 8 shown, the first bifurcated portion 13 is driven by the pushing card 20 to deform towards the static spring component 50, and the deformation position of the first bifurcated portion 13 does not exceed the static spring component 50. In this way, the deformation position of the first bifurcated portion 13 is located within the range formed by the static spring component 50 and the moving contact 15, without occupying other spaces additionally; it ensures the compactness of the moving direction of the pushing card 20 and is convenient for compressing the product volume.

[0047] The number of the contact portions 1 is two groups, which are distributed on the left and right sides of the magnetic circuit portion 40. The armature assembly 41 of the magnetic circuit portion 40 is connected to the moving spring components 10 of the two groups of contact portions 1 through the pushing card 20 at the same time; at the same time, the up and down limit of the pushing card 20 is realized by the moving spring components 10 on the left and right sides. Specifically, arc-shaped segments 132 for preventing chip scraping are formed by lateral bending on both the upper and lower sides of the pushing portion 131 of the first bifurcated portion 13; the pushing portion 131 of the first bifurcated portion 13 is fitted in the pushing slot 21 of the pushing card 20 and forms the up and down limit. When pushing, the arc-shaped segments 132 are in contact with the pushing card 20, which can effectively avoid the generation of chips and ensure the stability of the product.

[0048] It further includes an auxiliary contact 60. As Figure 10 shown, the auxiliary contact 60 is assembled on the base 30 and forms a cooperation with the lower side of the pushing card 20; the armature assembly 41 synchronously drives the auxiliary contact 60 to perform opening and closing actions through the pushing card 20. The auxiliary contact 60 is used to indicate the opening and closing states of the contact portion 1; the pushing card 20 horizontally translates in the left and right directions, and the auxiliary contact 60 is arranged below the pushing card 20, making the structure more compact.

[0049] Further, in this embodiment, in order to ensure the current-carrying capacity of the moving spring assembly 10, the moving spring assembly 10 further includes a current-carrying spring piece 18, and the current-carrying spring piece 18 is fixedly attached to one side of the contact moving spring piece 12; specifically, it is the side of the contact moving spring piece 12 facing away from the moving contact 15. As in this embodiment, current-carrying spring pieces 16 are assembled on both the upper and lower contact moving spring pieces 12; to increase the current-carrying capacity of the moving spring assembly 10; and the current-carrying spring piece 16 is fixedly attached to the side of the contact moving spring piece 12 facing away from the moving contact 15, which will not affect the movement of the contact moving spring piece 12. Of course, the current-carrying spring piece 18 can also be on the same side as the moving contact 15. In this way, the current-carrying spring piece 18 can increase the relief hole to make way for the moving contact 15; to avoid interfering with the moving contact 15.

[0050] More specifically, in this embodiment, the end of the current-carrying spring piece 16 is bent to form a bent portion 161, and the bent portion 161 abuts against the push card 20. With such a setting, it can also effectively avoid products with scraping chips, and has a good positioning effect on the push card 20.

[0051] Of course, in other embodiments, when the moving spring assembly 10 has sufficient current-carrying capacity, the current-carrying spring piece 16 may not be provided.

[0052] Embodiment Two

[0053] A moving spring assembly provided in this embodiment is substantially the same as the structure of Embodiment One, the difference being that: in this embodiment, there is only one contact moving spring piece 12 fixed on the moving spring lead foot 11, which is equivalent to removing the lower contact moving spring piece 12 on the basis of the structure of Embodiment One; in this way, the height of the moving spring assembly 10 can be further reduced; however, compared with the structure of Embodiment One, the current-carrying capacity of the moving spring assembly 10 may be reduced; it is more suitable for low-power relays.

[0054] This embodiment also provides a relay, which is substantially the same as the structure of the relay in Embodiment One, the difference being that: the moving spring assembly in this embodiment is adopted.

[0055] Of course, in other embodiments, the number of contact moving spring pieces 12 of the moving spring assembly 10 can be increased or decreased according to actual situations, such as it can also be increased to three or more.

[0056] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in form and detail without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. A dynamic spring assembly, comprising a dynamic spring lead-out pin, a contact dynamic spring sheet fixed on the dynamic spring lead-out pin, and a dynamic contact point arranged on the contact dynamic spring sheet; a portion of the contact dynamic spring sheet away from the dynamic spring lead-out pin is defined as a contact section, characterized in that: The contact section of the contact spring is bifurcated to form a first bifurcated portion and a second bifurcated portion spaced apart in the width direction of the contact spring, the end of the first bifurcated portion forming a pushing portion; the moving contact is arranged on the second bifurcated portion and deviates from the center line position of the contact section in a direction away from the first bifurcated portion; the end of the second bifurcated portion forms a pulling portion.

2. The dynamic spring assembly according to claim 1, characterized in that: The width of the second bifurcated portion is greater than the width of the first bifurcated portion.

3. A relay, comprising a magnetic circuit part and a contact part, wherein the contact part comprises a static spring assembly and a dynamic spring assembly, and the armature assembly of the magnetic circuit part is connected to the dynamic spring assembly through a push card; characterized in that: The movable spring assembly is the movable spring assembly described in claim 1 or 2 above; the static spring assembly includes a static spring and a static contact arranged on the static spring and corresponding to the moving contact; the push card is provided with a push card slot and a yielding recess, and the yielding recess has a first side wall facing away from the static spring assembly and a second side wall facing the static spring assembly; the pushing portion of the contact movable spring piece is engaged in the pushing card slot of the push card, and the pulling portion of the contact movable spring piece is engaged in the yielding recess of the push card, and the pulling portion is close to the first side wall of the yielding recess and maintains a yielding distance with the second side wall; when the push card moves in the closing direction, the pushing portion of the first fork portion is pushed to drive the moving contact on the second fork portion to perform a closing action; when the push card moves in the opening direction, the pulling portion on the second fork portion is pulled by the first side wall of the yielding recess to drive the moving contact to perform an opening action.

4. The relay according to claim 3, characterized in that: In the width direction, the first fork portion and the second fork portion of the contact movable spring sheet are aligned in the absence of external force; when the push card drives the movable spring assembly to complete closing, the first fork portion is driven by the push card to deform toward the static spring assembly, and the deformation position of the first fork portion does not exceed the static spring assembly.

5. The relay according to claim 3, characterized in that: It also includes a base, the magnetic circuit part and the contact part are both assembled on the base, and the width direction of the contact spring is perpendicular to the base, so that the first fork part and the second fork part of the contact spring are distributed up and down.

6. The relay according to claim 5, characterized in that: At least one side of the pushing portion of the first fork portion is laterally bent to form an arc-shaped section that prevents scraping.

7. The relay according to claim 6, characterized in that: There are two groups of contact parts, which are distributed on the left and right sides of the magnetic circuit part. The armature assembly of the magnetic circuit part is simultaneously connected to the movable spring assemblies of the two groups of contact parts through a pushing card; the upper and lower sides of the pushing part of the first fork part are laterally bent to form an anti-scratch arc section; the pushing part of the first fork part is fitted in the pushing card slot of the pushing card to form a limit in the upper and lower directions.

8. The relay according to claim 7, characterized in that: It also includes an auxiliary contact, which is assembled on the base and cooperates with the lower side of the push card; the armature assembly synchronously drives the auxiliary contact to perform opening and closing actions through the push card.

9. The relay according to claim 5, characterized in that: The number of the contact moving springs of the moving spring assembly is at least two, which are arranged in an upper and lower interval distribution, and the second bifurcated parts of the contact segments of at least two contact moving springs are both located below the first bifurcated parts; at least two static contacts are arranged on the static spring to respectively correspond to the dynamic contacts on the at least two contact moving springs; at least two groups of push card grooves and yield recesses are arranged on the push card to respectively cooperate with the push part and the pull part of the at least two contact moving springs.

10. The relay according to claim 9, characterized in that: The portion where the contact movable spring piece is fixed to the movable spring lead-out pin is defined as a fixed section; the fixed sections of at least two contact movable spring pieces are an integral connection structure.

11. The relay according to claim 9, characterized in that: The portion where the contact spring is fixed to the lead-out pin of the movable spring is defined as a fixed section; the width of the fixed section of the contact spring is smaller than the contact section; the upper sides of the fixed section and the contact section of the upper contact spring are flush; the lower side of the contact section of the contact spring protrudes from the fixed section; and a clearance notch is provided on the lead-out pin of the movable spring to make way for the contact section of the lower contact spring.

12. The relay according to claim 3 or 9, characterized in that: The dynamic spring assembly also includes a current-carrying spring sheet, and the current-carrying spring sheet is fixedly attached to one side of the contact dynamic spring sheet.

13. The relay according to claim 12, characterized in that: The end of the current-carrying spring is bent and abuts against the push card.

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