Relay contact system and magnetic latching relay
By designing a first rigid and second rigid moving spring structure for asynchronous breaking in a magnetic latching relay, and optimizing the arc extinguishing space with a permanent magnet, the arcing problem caused by synchronous action is solved, the current carrying capacity and arc extinguishing effect are improved, and reliable breaking performance is achieved.
Patent Information
- Application Number
- CN202512026670.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-02-13
AI Technical Summary
In existing magnetic latching relays, the synchronous operation of multiple parallel moving springs makes it difficult to extinguish the arc of the moving springs at locations with small arc-extinguishing spaces, affecting current carrying capacity and product reliability.
Design a relay contact system by setting a first rigid moving spring and a second rigid moving spring in parallel on the moving spring lead-out piece, and using a driving component on a push card to make them asynchronously disconnect. The first rigid moving spring rotates in a balanced manner to disconnect, and the second rigid moving spring tilts first and then rotates to disconnect. Asynchronous disconnection is achieved by using a permanent magnet to optimize the arc extinguishing space.
It improves the current carrying capacity, ensures reliable disconnection of the moving spring in high-current application scenarios, reduces arcing, and improves the reliability and arc extinguishing effect of the product.
Smart Images
Figure CN121528816A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of relay technology, specifically to a relay contact system and a magnetic latching relay. Background Technology
[0002] A current type of new energy vehicle charging pile requires the charging pile to have high-power fast charging characteristics. This places higher demands on the current carrying capacity and product size of the magnetic latching relay in the charging pile. The current carrying capacity usually reaches 200A or even higher. Therefore, the existing magnetic latching relay design has multiple parallel rigid moving springs to improve the current carrying capacity and ensure that the product has a low contact voltage drop effect, thereby ensuring that the product generates relatively little heat during the current carrying process. However, in existing systems where multiple moving reeds are connected in parallel, they mostly operate synchronously, meaning they are pushed by a pusher to close or open synchronously with the stationary reeds. However, the arc-extinguishing space of each moving reed's position inside the relay varies. Typically, the moving reeds connected in parallel are arranged side by side inside the relay. The arc-extinguishing space of the moving reeds at both ends is relatively larger, while the arc-extinguishing space of the moving reeds in the middle of the arrangement is relatively smaller. Therefore, since the moving reeds operate synchronously during the breaking process, arcing occurs between each moving reed and its corresponding stationary reed. Consequently, the arc on the moving reed with the smaller arc-extinguishing space is less likely to be extinguished. Summary of the Invention
[0003] To address the shortcomings of existing technologies, this invention provides a relay contact system that primarily solves the technical problem that in existing relays, the moving springs operate synchronously, making it difficult to extinguish the arc generated by the moving springs at locations with relatively small arc-extinguishing spaces.
[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:
[0005] A relay contact system includes a base, on which a pusher and a movable spring lead are disposed. A first rigid movable spring and a second rigid movable spring are movably connected in parallel to the movable spring lead. A stationary spring is also disposed on the base. The arc-extinguishing space at the location of the second rigid movable spring is configured to be larger than the arc-extinguishing space at the location of the first rigid movable spring. The pusher has a first driving part and a second driving part that respectively engage with the first and second rigid movable springs. When the pusher moves relative to the base, the first driving part… The driving force is configured to act on the central position in the width direction of the first rigid moving spring, so that the first rigid moving spring will produce a balanced rotational breaking action when it breaks with the stationary spring. The driving force of the second driving part is configured to act on the side position in the width direction of the second rigid moving spring, so that the second rigid moving spring will first produce a side tilting action and then a rotational breaking action when it breaks with the stationary spring. This allows the first and second rigid moving springs to perform asynchronous breaking actions with the stationary spring during the breaking process.
[0006] Furthermore, a permanent magnet corresponding to the second rigid moving spring is also provided on the base. The permanent magnet is installed on the side of the base and corresponds to the side of the second rigid moving spring.
[0007] Furthermore, the first rigid moving spring and the second rigid moving spring are rotatably connected to the moving spring lead plate through a rotating connection structure, and the first rigid moving spring and the second rigid moving spring are electrically connected to the moving spring lead plate through a flexible connector.
[0008] Furthermore, both the first and second rigid moving springs are provided with moving contacts, and the stationary spring is provided with stationary contacts that correspond to the moving contacts on the first and second rigid moving springs, respectively, and the contact gaps between the first and second rigid moving springs and the stationary spring are equal in size.
[0009] Furthermore, both the first driving part and the second driving part are horizontally arranged cylindrical protrusion structures, and the first driving part and the second driving part form a line contact abutment with the corresponding first rigid moving spring and the second rigid moving spring.
[0010] Furthermore, at least one second rigid moving spring is provided on each side of the first rigid moving spring. The first rigid moving spring and the two second rigid moving springs are rotatably connected side by side to the moving spring lead plate. The upper ends of the first rigid moving spring and the two second rigid moving springs are electrically connected to the moving spring lead plate through a flexible connector. The contact gaps between the first rigid moving spring, the two second rigid moving springs and the stationary spring are equal. A permanent magnet is provided on each side of the base. The two permanent magnets are respectively located on the side of the two second rigid moving springs.
[0011] Furthermore, the first rigid moving spring and the two second rigid moving springs have the same overall structure, and each of the free ends of the first rigid moving spring and the two second rigid moving springs has a slot at its center, so that the free ends of the first rigid moving spring and the two second rigid moving springs form a forked structure with two forks; a compression spring is connected to the back side of each of the first rigid moving spring and the two second rigid moving springs, and several slots are provided on the push card. The lower end of each compression spring is configured to pass through the slot at the bottom of the corresponding rigid moving spring and then be inserted into the slot of the push card. When the push card moves forward, the push card pushes the lower end of each compression spring, and then each compression spring drives the first rigid moving spring and the second rigid moving spring to swing forward synchronously and then contact and close with the stationary spring.
[0012] Furthermore, the push card is provided with two first drive units, which are configured to abut against two fork arms at the free end of the first rigid moving spring, thereby generating a central thrust on the first rigid moving spring so that the first rigid moving spring will generate a balanced rotational breaking action when it breaks with the stationary spring. The push card is also provided with two second drive units, which are configured to abut against one of the fork arms at the free end of the two second rigid moving springs, thereby generating a non-central lateral thrust on the two second rigid moving springs so that the second rigid moving springs can first generate a lateral tilting action based on the structural assembly gap and then generate a rotational breaking action.
[0013] Furthermore, two first rigid moving springs arranged side by side are connected to the moving spring lead-out plate, and at least one second rigid moving spring is provided at the outer position of each of the two first rigid moving springs.
[0014] Based on the same inventive concept, the present invention also provides a magnetic latching relay, including the relay contact system described above.
[0015] The above technical solution has the following advantages or beneficial effects:
[0016] In the relay contact system and magnetic latching relay described in this invention, by setting a first rigid moving spring and a second rigid moving spring on the moving spring lead-out plate, and arranging the first and second rigid moving springs in parallel, the current carrying capacity of the relay can be improved, making it better suited for applications with high current carrying capacity of 200A or even higher. Furthermore, compared to existing synchronous moving spring structures, the first and second rigid moving springs are driven by a first driving part and a second driving part on a push plate, respectively. The driving force of the first driving part is configured to act at a central position in the width direction of the first rigid moving spring. Thus, during disconnection, even if there is a rotational assembly gap between the first rigid moving spring and the moving spring lead-out plate, because the driving force acts in a balanced manner at the central position in the width direction of the first rigid moving spring, the first rigid moving spring can rotate smoothly and without tilting, thereby disconnecting from the stationary spring. Simultaneously, the driving force of the second driving part is configured to act at the first rigid moving spring lead-out plate... The side position of the second rigid moving spring in the width direction, that is, when the driving force of the second driving part acts on the second rigid moving spring, is off-center. Thus, because there is a rotational assembly gap between the second rigid moving spring and the moving spring lead-out plate, the second rigid moving spring first tilts to the side and then rotates to break off when it breaks off from the stationary spring. When the second rigid moving spring tilts, the moving contact on the second rigid moving spring can still form a rolling contact with the stationary contact on the stationary spring, so that the second rigid moving spring can break off relatively late compared to the first rigid moving spring. Thus, the first rigid moving spring that breaks off first can serve as a reliable contact protection end structure, while the second rigid moving spring that breaks off later serves as an effective breaking protection end. That is, the first rigid moving spring that breaks off first does not produce arcing when it breaks off, while the second rigid moving spring that breaks off later can produce arcing when it breaks off. However, since the arc-extinguishing space at the position of the second rigid moving spring is relatively large, it is conducive to arc extinguishing, thereby ensuring reliable breaking off. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the arrangement of the first rigid moving spring and the second rigid moving spring according to an embodiment of the present invention.
[0018] Figure 2 This is a schematic diagram of the arrangement of the first rigid moving spring and the second rigid moving spring at another angle in an embodiment of the present invention.
[0019] Figure 3 This is a schematic diagram of the internal structure of the magnetic latching relay according to an embodiment of the present invention.
[0020] Figure 4 This is a schematic diagram of the cooperative structure of the first rigid moving spring, the second rigid moving spring, and the pusher card in an embodiment of the present invention.
[0021] Figure 5This is a schematic diagram of the rigid moving spring according to an embodiment of the present invention.
[0022] Figure 6 This is a three-dimensional structural diagram of the push card according to an embodiment of the present invention.
[0023] Figure 7 This is a schematic diagram of the closed state of the relay contact system according to an embodiment of the present invention.
[0024] Figure 8 This is a schematic diagram of the relay contact system in the disconnected state according to an embodiment of the present invention.
[0025] Figure 9 This is a schematic diagram of the rotational connection structure between the rigid moving spring and the moving spring lead-out plate in an embodiment of the present invention.
[0026] Label Explanation:
[0027] 1. Base, 2. Push card, 3. Moving spring lead-out piece, 4. First rigid moving spring, 5. Second rigid moving spring, 6. Static spring, 7. Permanent magnet, 8. Compression spring, 21. First drive unit, 22. Second drive unit, 23. Card slot. Detailed Implementation
[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0030] Please refer to the appendix. Figure 1 To be continued Figure 9An embodiment of the present invention provides a relay contact system, including a base 1, a push card 2 and a moving spring lead-out piece 3 disposed on the base 1, a first rigid moving spring piece 4 and a second rigid moving spring piece 5 movably connected in parallel to the moving spring lead-out piece 3, a stationary spring piece 6 disposed on the base 1, the arc-extinguishing space at the location of the second rigid moving spring piece 5 being configured to be larger than the arc-extinguishing space at the location of the first rigid moving spring piece 4, a moving contact on both the first rigid moving spring piece 4 and the second rigid moving spring piece 5, and a stationary contact on the stationary spring piece 6 corresponding to the moving contacts on the first rigid moving spring piece 4 and the second rigid moving spring piece 5, respectively. The push card 2 is provided with a contact corresponding to the first rigid moving spring piece 4 and the second rigid moving spring piece 5, respectively. 5. The first driving part 21 and the second driving part 22 engage in a resistive engagement. When the push card 2 moves relative to the base 1, the driving force of the first driving part 21 is configured to act on the central position in the width direction of the first rigid moving spring 4, so that the first rigid moving spring 4 produces a balanced rotational breaking action when it breaks with the stationary spring 6. The driving force of the second driving part 22 is configured to act on the side position in the width direction of the second rigid moving spring 5, so that the second rigid moving spring 5 first produces a side tilting action and then a rotational breaking action when it breaks with the stationary spring 6. This allows the first rigid moving spring 4 and the second rigid moving spring 5 to perform asynchronous breaking actions with the stationary spring 6 in sequence during the breaking process.It is understood that in this embodiment, by setting a first rigid moving spring 4 and a second rigid moving spring 5 on the moving spring lead-out piece 3, and setting the first rigid moving spring 4 and the second rigid moving spring 5 in parallel, the current carrying capacity of the relay can be improved to better suit applications with high current carrying capacity of 200A or even higher. Furthermore, compared to existing synchronous moving spring structures, the first rigid moving spring 4 and the second rigid moving spring 5 are driven by the first driving part 21 and the second driving part 22 on the push card 2, respectively. Moreover, the driving force of the first driving part 21 is configured to act on the central position in the width direction of the first rigid moving spring 4. Furthermore, the first rigid moving spring 4 and the second rigid moving spring 5 are rotatably connected to the rotating shaft fixed on the moving spring lead plate 3 via independent rotating frames. Each rotating frame and the rotating shaft has a certain rotational assembly clearance (the rotating shaft hole on each rotating frame is slightly larger than the outer diameter of the rotating shaft, so that when the rigid moving spring is subjected to an off-center external force, it tends to tilt to the side). The rotational movements of the first rigid moving spring 4 and the second rigid moving spring 5 relative to the moving spring lead plate 3 are independent of each other. Thus, during breakage, even if there is a rotational assembly clearance between the first rigid moving spring 4 and the moving spring lead plate 3, the pushing force is balanced. The first rigid moving spring 4 is positioned at the center of its width direction. Therefore, the first rigid moving spring 4 can rotate smoothly and without tilting to break off from the stationary spring 6. Simultaneously, the driving force of the second drive unit 22 is configured to act on the side of the second rigid moving spring 5 in its width direction. That is, when the driving force of the second drive unit 22 acts on the second rigid moving spring 5, it is off-center. Thus, because there is a rotational assembly gap between the second rigid moving spring 5 and the moving spring lead-out piece 3, the second rigid moving spring 5 first tilts sideways and then rotates to break off from the stationary spring 6. When the moving spring 5 tilts, the moving contact on the second rigid moving spring 5 can still form rolling contact with the stationary contact on the stationary spring 6, so that the second rigid moving spring 5 can be delayed in breaking relative to the first rigid moving spring 4. In this way, the first rigid moving spring 4, which breaks first, can serve as a reliable contact protection end structure, while the second rigid moving spring 5, which breaks later, serves as an effective breaking protection end. That is, the first rigid moving spring 4, which breaks first, does not generate arcing when it breaks, while the second rigid moving spring 5, which breaks later, can generate arcing when it breaks. However, since the arc-extinguishing space at the position of the second rigid moving spring 5 is relatively large, it is conducive to arc extinguishing, thereby ensuring reliable breaking.
[0031] Please refer to the appendix. Figure 1 To be continued Figure 9In one preferred embodiment, the first rigid moving spring 4 and the second rigid moving spring 5 are rotatably connected to the moving spring lead-out piece 3 via a rotating connection structure, and the first rigid moving spring 4 and the second rigid moving spring 5 are electrically connected to the moving spring lead-out piece 3 via a flexible connector. Preferably, in this embodiment, the contact gaps between the first rigid moving spring 4 and the second rigid moving spring 5 and the stationary spring 6 are equal. In this embodiment, the rotatable connection of the first rigid moving spring 4 and the second rigid moving spring 5 to the moving spring lead-out piece 3 via a rotating connection structure and the electrical connection via a flexible connector is prior art, and the specific structure will not be described further here.
[0032] Please refer to the appendix. Figure 1 To be continued Figure 9 In one preferred embodiment, both the first driving part 21 and the second driving part 22 are laterally arranged cylindrical protrusion structures, and the first driving part 21 and the second driving part 22 form a line contact abutment with the corresponding first rigid moving spring 4 and the second rigid moving spring 5. In this embodiment, the line contact abutment structure makes the abutment between the first driving part 21 and the second driving part 22 and the corresponding first rigid moving spring 4 and the second rigid moving spring 5 more stable, thereby improving the stability of the breaking action.
[0033] Please refer to the appendix. Figure 1 To be continued Figure 9In one preferred embodiment, a permanent magnet 7 corresponding to the second rigid moving spring 5 is also provided on the base 1. The permanent magnet 7 is installed on the side of the base 1 and corresponds to the side of the second rigid moving spring 5. Further, at least one second rigid moving spring 5 is provided on each side of the first rigid moving spring 4. The first rigid moving spring 4 and the two second rigid moving springs 5 are rotatably connected side by side to the moving spring lead plate 3. The upper ends of the first rigid moving spring 4 and the two second rigid moving springs 5 are electrically connected to the moving spring lead plate 3 through a flexible connector. The contact gap between the first rigid moving spring 4, the two second rigid moving springs 5 and the stationary spring 6 is equal. A permanent magnet 7 is provided on each side of the base 1, and the two permanent magnets 7 are respectively provided on the side of the two second rigid moving springs 5. It is understandable that in this embodiment, since the three moving springs are arranged side by side, and the two permanent magnets 7 are respectively located on the sides of the two second rigid moving springs 5, the magnetic field of the first rigid moving spring 4, located in the middle of the three moving springs, is the weakest. Based on improving the current-carrying capacity by connecting the three moving springs in parallel, and by configuring the middle first rigid moving spring 4 as the reliable contact protection end and the two second rigid moving springs 5 on both sides as the effective breaking protection end, the first rigid moving spring 4 will break before the two second rigid moving springs 5 on both sides during the breaking process. Since the two second rigid moving springs 5 remain closed with the stationary spring 6 when the first rigid moving spring 4 breaks, the magnetic field of the first rigid moving spring 4 is the weakest. No arcing occurs between the plate 4 and the stationary spring 6. Arcing only occurs between the two second rigid moving springs 5 and the stationary spring 6 when they break apart. Therefore, the problem of poor arc extinguishing effect caused by the weak magnetic field strength of the first rigid moving spring 4 in the middle position is cleverly avoided. The optimized layout of the second rigid moving springs 5 on both sides being closer to the corresponding permanent magnets 7 makes arcing occur when the second rigid moving springs 5 break apart, and the magnetic field of the corresponding permanent magnets 7 generates an arc blowing effect to better extinguish the arc. This maximizes the arc blowing and extinguishing capability of the permanent magnets 7, and takes into account both obtaining a lower contact voltage drop when carrying current and maximizing the utilization of the arc blowing effect of the permanent magnets when the contacts break apart.
[0034] Please refer to the appendix. Figure 1 To be continued Figure 9In one preferred embodiment, the first rigid moving spring 4 and the two second rigid moving springs 5 have the same overall structure, and slots are formed at the center of the free ends of the first rigid moving spring 4 and the two second rigid moving springs 5, so that the free ends of the first rigid moving spring 4 and the two second rigid moving springs 5 form a forked structure with two forked arms. In this embodiment, by configuring the three rigid moving springs to be composed of the same structure, the processing of the moving spring parts is simpler, the assembly is more convenient, and the production efficiency is improved. In one preferred embodiment, the push card 2 is provided with two first driving parts 21, which are configured to abut against two fork arms at the free ends of the first rigid moving spring 4, thereby generating a central thrust on the first rigid moving spring 4, so that the first rigid moving spring 4 can generate a balanced rotational breaking action when it breaks with the stationary spring 6. The push card 2 is also provided with two second driving parts 22, which are configured to abut against one of the fork arms at the free ends of the two second rigid moving springs 5, thereby generating a non-central lateral thrust on the two second rigid moving springs 5, so that the second rigid moving springs 5 can first generate a lateral tilting action based on the structural assembly gap, and then generate a rotational breaking action. In this embodiment, slots are provided at the center of the free ends of both the first rigid moving spring 4 and the two second rigid moving springs 5, forming a forked structure at their ends. The contact between the forked arm on one side and the corresponding second driving part 22 makes the tilting action of the second rigid moving spring 5 more sensitive during breakage, better ensuring that the first rigid moving spring 4 can break before the second rigid moving spring 5. Simultaneously, a compression spring 8 is connected to the back side of both the first rigid moving spring 4 and the second rigid moving spring 5. Several slots 23 are provided on the push card 2. The lower end of each compression spring 8 is configured to pass over the slot at the bottom of the corresponding rigid moving spring and engage with the slot 23 of the push card 2. When the push card 2 moves forward, it pushes the lower end of each compression spring 8, which in turn drives the first rigid moving spring 4 and the second rigid moving spring 5 to swing forward synchronously and then contact and close with the stationary spring 4. In this embodiment, since the lower end of the compression spring 8 can adaptably pass over the corresponding rigid moving spring... The slot at the bottom allows for full utilization of the internal space of the relay, improving space efficiency. At the same time, the setting of the compression spring 8 ensures the synchronous consistency of each rigid moving spring during the closing process, meeting the closing performance requirements of the relay. It also does not affect the special design requirement of the first rigid moving spring 4 and the second rigid moving spring 5 to disconnect synchronously. This allows the relay to maintain the low resistance advantage brought by multiple sets of parallel rigid moving springs, while also taking into account the synchronous design of multiple sets of parallel moving springs closing and connecting. On this basis, it can achieve the load breaking of the specified contact structure to meet the arc breaking performance.
[0035] Furthermore, those skilled in the art should understand that in other embodiments, two or more first rigid moving springs 4 arranged side by side may be connected to the moving spring lead-out piece 3, and at least one second rigid moving spring 5 may be provided at the outer position of the first rigid moving springs 4 at both ends. This is not limited to the specific implementation disclosed in this embodiment.
[0036] Please refer to the appendix. Figure 1 To be continued Figure 9 An embodiment of the present invention also provides a magnetic latching relay, including the relay contact system described above.
[0037] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features therein. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.
Claims
1. A relay contact system, characterized in that: The system includes a base (1), on which a pusher (2) and a moving spring lead-out piece (3) are provided. At least one first rigid moving spring piece (4) and one second rigid moving spring piece (5) are movably connected to the moving spring lead-out piece (3). A stationary spring piece (6) is also provided on the base (1). The arc-extinguishing space at the location of the second rigid moving spring piece (5) is configured to be larger than the arc-extinguishing space at the location of the first rigid moving spring piece (4). The pusher (2) is provided with a first driving part (21) and a second driving part (22) that respectively engage with the first rigid moving spring piece (4) and the second rigid moving spring piece (5). When the pusher (2) moves relative to the base (1), The driving force of the first drive unit (21) is configured to act on the central position in the width direction of the first rigid moving spring (4) so that the first rigid moving spring (4) generates a balanced rotational breaking action when breaking with the stationary spring (6), while the driving force of the second drive unit (22) is configured to act on the side position in the width direction of the second rigid moving spring (5) so that the second rigid moving spring (5) generates a side tilting action first and then a rotational breaking action when breaking with the stationary spring (6), so that the first rigid moving spring (4) and the second rigid moving spring (5) can sequentially and asynchronously break with the stationary spring (6) during the breaking process.
2. The relay contact system according to claim 1, characterized in that: The base (1) is also provided with a permanent magnet (7) corresponding to the second rigid moving spring (5). The permanent magnet (7) is installed on the side of the base (1) and corresponds to the side of the second rigid moving spring (5).
3. The relay contact system according to claim 1, characterized in that: The first rigid moving spring (4) and the second rigid moving spring (5) are rotatably connected to the moving spring lead-out piece (3) through a rotating connection structure, and the first rigid moving spring (4) and the second rigid moving spring (5) are electrically connected to the moving spring lead-out piece (3) through a flexible connector.
4. The relay contact system according to claim 3, characterized in that: Both the first rigid moving spring (4) and the second rigid moving spring (5) are provided with moving contacts, and the stationary spring (6) is provided with stationary contacts that correspond to the moving contacts on the first rigid moving spring (4) and the second rigid moving spring (5), and the contact gaps between the first rigid moving spring (4), the second rigid moving spring (5) and the stationary spring (6) are equal.
5. The relay contact system according to any one of claims 1 to 4, characterized in that: The first driving part (21) and the second driving part (22) are both horizontally arranged cylindrical protrusion structures. The first driving part (21) and the second driving part (22) form a line contact abutment with the corresponding first rigid moving spring (4) and the second rigid moving spring (5).
6. The relay contact system according to claim 5, characterized in that: At least one second rigid moving spring (5) is provided on each side of the first rigid moving spring (4). The first rigid moving spring (4) and the two second rigid moving springs (5) are rotatably connected to the moving spring lead plate (3) side by side. The upper ends of the first rigid moving spring (4) and the two second rigid moving springs (5) are electrically connected to the moving spring lead plate (3) through a flexible connector. The contact gaps between the first rigid moving spring (4) and the two second rigid moving springs (5) and the stationary spring (6) are equal. A permanent magnet (7) is provided on each side of the base (1). The two permanent magnets (7) are respectively located on the side of the two second rigid moving springs (5).
7. The relay contact system according to claim 6, characterized in that: The first rigid moving spring (4) and the two second rigid moving springs (5) have the same overall structure, and slots are provided at the center of the free ends of the first rigid moving spring (4) and the two second rigid moving springs (5), so that the free ends of the first rigid moving spring (4) and the two second rigid moving springs (5) form a forked structure with two forked arms. A compression spring (8) is connected to the back side of both the first rigid moving spring (4) and the second rigid moving spring (5). Several slots (23) are provided on the push card (2). The lower end of each compression spring (8) is configured to pass through the slot at the bottom of the corresponding rigid moving spring and then be inserted into the slot (23) of the push card (2). When the push card (2) moves forward, the push card (2) pushes the lower end of each compression spring (8), and then each compression spring (8) drives the first rigid moving spring (4) and the second rigid moving spring (5) to swing forward synchronously and then contact and close with the stationary spring (4).
8. The relay contact system according to claim 7, characterized in that: Two first drive units (21) are provided on the push card (2). The two first drive units (21) are configured to abut against two forks at the free end of the first rigid moving spring (4) respectively, thereby generating a central thrust on the first rigid moving spring (4) so that the first rigid moving spring (4) will generate a balanced rotational breaking action when it breaks with the stationary spring (6). Two second drive units (22) are provided on the push card (2). The two second drive units (22) are configured to abut against one of the forks at the free end of the two second rigid moving springs (5) respectively, thereby generating a non-central lateral thrust on the two second rigid moving springs (5) so that the second rigid moving springs (5) can first generate a lateral tilting action based on the structural assembly gap and then generate a rotational breaking action.
9. The relay contact system according to claim 6, characterized in that: Two first rigid moving springs (4) are connected to the moving spring lead-out piece (3) and are arranged side by side. At least one second rigid moving spring (4) is provided on the outer side of each of the two first rigid moving springs (4).
10. A magnetic latching relay, characterized in that: Includes the relay contact system as described in any one of claims 1 to 9.