Magnetic latching relay

Abstract

The utility model discloses a magnetic latching relay, comprising a movable contact mechanism comprising a first support, a second support and a second elastic member, a magnetic circuit mechanism driving the first support to reciprocate along a first direction, and the first support driving the second support to move along the first direction after overcoming a movement stroke during a movement process; the second support is fixedly provided with a moving contact assembly, and the moving contact assembly comprises at least two moving contact pieces which are arranged in parallel. The second elastic piece is located between the first support and the second support. The static contact assembly comprises a static contact piece, and the static contact piece is provided with a static contact. The first bracket and the second bracket move relative to the guide piece; the first elastic piece provides auxiliary force for the first support. The moving contact assembly moves up and down, the distance between the moving contact assembly and the static contact assembly is increased, the plurality of moving contact pieces are connected in parallel, and the contact resistance is reduced; the first support and the second support move along the guide part, and the guide structure is stable and convenient to install and fix. And the second elastic piece applies pressure to the contact, so that the electrical connection effect is better.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, specifically to a magnetic latching relay. Background Technology

[0002] Magnetic latching relays automatically connect and disconnect circuits. They are suitable for many products, such as electricity meters and smart home devices. Especially in electricity meters, to improve safety standards, national standards for electricity meters are constantly being improved and revised, requiring adjustments to the structure of the magnetic latching relays located inside the meters. The latest standards specify requirements for parameters such as the spacing between the moving and stationary contacts and the contact resistance, necessitating adjustments by those skilled in the art to meet these requirements. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is how to adjust the structure to meet the requirements of the corresponding parameters. To this end, a magnetic latching relay includes:

[0004] The movable contact mechanism includes a first support, a second support, and a second elastic element. One end of the first support is linked with a magnetic circuit mechanism, which drives the first support to reciprocate along a first direction. There is a movable stroke between the first support and the second support. When the first support overcomes the movable stroke during movement, it drives the second support to move along the first direction. The second support is fixed with a movable contact assembly, which includes at least two movable contact pieces arranged in parallel. Each movable contact piece has a movable contact head at both ends. The second elastic element is located between the first support and the second support.

[0005] A stationary contact assembly includes a stationary contact piece, which is correspondingly disposed with a moving contact piece. One end of the stationary contact piece is provided with a stationary contact that cooperates with the moving contact, and the other end of the stationary contact piece extends outward.

[0006] A guide member passes through the first bracket and the second bracket, and the first bracket and the second bracket move relative to the guide member;

[0007] The first elastic element provides an auxiliary force to the first support.

[0008] One of the first bracket and the second bracket is provided with a first buckle, and the other of the first bracket and the second bracket is provided with a first slot, and the first buckle moves in the first slot.

[0009] The second support is provided with a supporting leg, and the first clamping groove is arranged on the supporting leg; the first support is provided with a sliding groove, the sliding groove is provided with a limiting protrusion, the supporting leg extends to the sliding groove, and the limiting protrusion is matched with the supporting leg.

[0010] Further comprising a shell, the shell is provided with a fixed block, one end of the guide piece is matched with the fixed block, and the other end of the guide piece extends to the side of the inner wall of the shell along the first direction.

[0011] The guide piece is provided with a limiting boss, the first elastic piece is sleeved on the guide piece, one end of the first elastic piece abuts against the limiting boss, and the other end of the first elastic piece abuts against the first support.

[0012] The moving contact piece is connected with a first magnetic yoke, and further comprising a shell, the inner wall of the shell is fixed with a second magnetic yoke matched with the first magnetic yoke.

[0013] The first direction is arranged vertically to a horizontal plane, or the first direction is arranged obliquely, further comprising a shell, the shell is provided with an energy storage cavity, the first elastic piece is accommodated in the energy storage cavity, and the first elastic piece abuts against the end of the guide piece away from the second support.

[0014] Further comprising a shell, the shell is provided with a first cavity and a second cavity, the first cavity and the second cavity are arranged independently, the magnetic circuit mechanism is accommodated in the first cavity, and the static contact assembly is accommodated in the second cavity.

[0015] The magnetic circuit mechanism comprises a coil assembly, an armature assembly and a connecting structure, the coil assembly and the armature assembly are matched to generate swing force for driving the first support to move, the connecting structure comprises a transmission groove arranged at one end of the first support and a push rod arranged on the armature assembly and penetrating into the transmission groove, and a connecting shaft is formed on the push rod and connected in the transmission groove.

[0016] The second cavity is provided with a heat dissipation hole.

[0017] The technical scheme of the utility model has the following advantages:

[0018] 1. The magnetic latching relay provided by the utility model, through the up-down movement of the moving contact assembly, the distance between the moving contact assembly and the static contact assembly is increased, secondly, the parallel effect is formed by the plurality of moving contact pieces, the contact resistance is reduced, the movable stroke plays a buffering effect and prevents misoperation, the guide piece plays a guiding effect, the first support and the second support move along the guide piece, and the guiding structure is stable in structure and convenient to install and fix, the second elastic piece is arranged, the contact pressure is given, and the electrical connection effect is better in the electrical connection process.

[0019] 2. The utility model provides a kind of magnetic latching relay, the setting of second elastic member, first buckle is in the first card slot sliding, and cooperate second elastic member, form the above-mentioned movable stroke.Simultaneously cooperate second elastic member, better realize contact pressure, improve the stability of electrical connection.

[0020] 3. The utility model provides a kind of magnetic latching relay, limiting protrusion forms the effect of limiting support foot to move towards outside, so that support foot can only slide along the direction of sliding groove, and form restriction in other directions.

[0021] 4. The utility model provides a kind of magnetic latching relay, the setting of fixed block, better realize the fixing effect of guide piece, the fixed block is additionally provided with reinforcing rib here.

[0022] 5. The utility model provides a kind of magnetic latching relay, limiting boss better realizes the fixing of first elastic member, so that first elastic member can be more stably operated in the movement process.

[0023] 6. The utility model provides a kind of magnetic latching relay, first magnetic yoke and second magnetic yoke, when entire electrical circuit is energized, magnetic field will be generated between first magnetic yoke and second magnetic yoke, two magnetic fields attract, can better realize the electrical connection between movable contact piece and static contact piece, improve the stability of connection.

[0024] 7. The utility model provides a kind of magnetic latching relay, first direction is perpendicular to horizontal plane, direction positioning is complete, is convenient for processing and is convenient for installation;Inclined setting can increase the electrical gap between adjacent two static contact pieces, better realize isolation effect.

[0025] 8. The utility model provides a kind of magnetic latching relay, mutually independent chamber, prevent electrical interference, first chamber is weak current, and second chamber is strong current.

[0026] 9. The utility model provides a kind of magnetic latching relay, directly through push rod and transmission groove cooperation, shorten the distance of coil assembly to first support, so as to reduce the width of entire magnetic latching relay, so as to meet the installation of magnetic latching relay in electric energy meter. DRAWINGS

[0027] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will be briefly introduced to the drawings needed to be used in the specific embodiment or prior art description, obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0028] Figure 1The utility model provides a magnetic latching relay's structure schematic drawing is provided;

[0029] Figure 2 The utility model provides a magnetic latching relay's partial structure schematic drawing is provided;

[0030] Figure 3 For Figure 2 The top view of

[0031] Figure 4 For Figure 2 The sectional view of

[0032] Figure 5 The utility model provides a first support, second support, movable contact piece cooperation's structure schematic drawing is provided;

[0033] Figure 6 The utility model provides a magnetic latching relay's structure schematic drawing of another structure.

[0034] Mark explanation:

[0035] 11, first support;12, second support;13, second elastic part;14, movable contact piece;15, static contact piece;16, guide piece;17, first elastic part;18, first buckle;19, first card slot;20, first magnetic yoke;21, shell;22, second magnetic yoke;23, coil assembly;24, armature assembly;25, shield cover;111, sliding groove;112, limit protrusion;113, first positioning column;114, first through hole;115, transmission groove;121, support leg;122, fixed part;123, second through hole;141, movable contact;151, static contact;161, limit boss;201, second positioning column;211, fixed block;212, first chamber;213, second chamber;214, heat dissipation hole;215, inclined plane;216, energy storage cavity;241, push rod;242, connecting shaft. Specific implementation

[0036] The technical scheme of the utility model will be described below in connection with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0037] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0040] Example 1

[0041] The embodiment provides a magnetic latching relay, as shown in the accompanying drawings, Figures 1-5 Comprise:

[0042] The moving contact mechanism comprises a first support 11, a second support 12 and a second elastic member 13, one end of the first support 11 is connected with the magnetic circuit mechanism in linkage, in the embodiment, the upper end of the first support 11 is connected with the magnetic circuit mechanism, and the magnetic circuit mechanism drives the first support 11 to move. The magnetic circuit mechanism drives the first support 11 to reciprocate along the first direction, and the first direction can be a vertical direction or an inclined direction, which can be set according to actual requirements. An active stroke is arranged between the first support 11 and the second support 12, and the first support 11 drives the second support 12 to move along the first direction after overcoming the active stroke in the movement process. The second support 12 is fixed with a moving contact assembly, the moving contact assembly comprises at least two parallel moving contact pieces 14, and both ends of the moving contact piece 14 are provided with moving contact heads 141. When the first support 11 moves, the second support 12 moves, which is equivalent to that the first support 11 drives the moving contact piece 14 to move towards the static contact piece, so that the electrical connection effect is realized. The second elastic member 13 is located between the first support 11 and the second support 12, and the second elastic member 13 is a spring here.

[0043] The static contact assembly comprises static contact pieces 15 corresponding to the dynamic contact pieces 14. In this embodiment, the number of static contact pieces 15 is two. When the dynamic contact pieces 14 move, the electrical connection between the two static contact pieces 15 is formed, which is equivalent to the operation of the entire magnetic latching relay. In this embodiment, one static contact piece 15 forms an electrical connection with the same end of different dynamic contact pieces 14. Specifically, for example, the number of dynamic contact pieces 14 is two, and the left and right ends of the two dynamic contact pieces 14 are provided with dynamic contact heads 141. One end of the static contact piece 15 located at the left end is also provided with two static contact heads 151, and one end of the static contact piece 15 located at the right end is also provided with two static contact heads 151. The two static contact heads 151 located at the left end form electrical connections with the dynamic contact heads 141 at the left ends of the two dynamic contact pieces 14, respectively. The other end of the static contact piece 15 extends outward. Here, the other end of the static contact piece 15 extends downward perpendicularly to the horizontal plane. Specifically, because of the installation environment of the magnetic latching relay, when the magnetic latching relay is installed in an electric energy meter, the static contact piece 15 is arranged vertically downward. Therefore, the other end of the static contact piece 15 must extend downward perpendicularly to the horizontal plane.

[0044] The guide 16 passes through the first support 11 and the second support 12. The first support 11 and the second support 12 move relative to the guide 16, and the guide 16 has a guiding effect. For example, when the first direction is the Z-axis direction, the imaginary central axis of the guide 16 is also located on the Z-axis, and the two are in the same direction.

[0045] The first elastic member 17 provides an auxiliary force to the first support 11. When the first support 11 moves toward the static contact piece 15, the first elastic member 17 accelerates the movement of the first support 11 and provides auxiliary power when the contact is closed. Conversely, when the first support 11 moves away from the static contact piece 15, the first elastic member 17 stores energy.

[0046] The up-and-down movement of the dynamic contact assembly increases the distance between the dynamic contact assembly and the static contact assembly. In addition, the parallel effect is formed by the plurality of dynamic contact pieces 14, which reduces the contact resistance. The movable stroke has a buffering effect to prevent misoperation. The guide 16 has a guiding effect. The first support 11 and the second support 12 move along the guide 16. Moreover, this guiding structure is stable in structure and is convenient for installation and fixation. The second elastic member 13 provides a contact pressure, so that the electrical connection effect is better during electrical connection.

[0047] Specifically, as shown in FIG. 1, the magnetic latching relay comprises a first support 11, a second support 12, a dynamic contact assembly, a static contact assembly, a guide 16, a first elastic member 17, and a second elastic member 13. Figures 2-5As shown, one of the first support 11 and the second support 12 is provided with the first buckle 18, and the other of the first support 11 and the second support 12 is provided with the first clamping groove 19, and the first buckle 18 is movable in the first clamping groove 19. The first buckle 18 is slidable in the first clamping groove 19, and cooperates with the second elastic member 13 to form the above-mentioned movable stroke, and cooperates with the second elastic member 13 to better realize the contact pressure and improve the stability of the electrical connection. It should be noted that the first support 11 and the second support 12 are movably arranged in the first direction, but are limited and locked in other directions and cannot be detached. The length of the movable stroke can be adjusted according to actual needs. In addition, the movable structure can also be formed by other means.

[0048] Specifically, as shown in the accompanying drawings, Figures 2-5 As shown, the second support 12 is provided with a support leg 121, and the first clamping groove 19 is arranged on the support leg 121. The first support 11 is provided with a sliding groove 111, and the side wall of the sliding groove 111 is provided with a limiting protrusion 112. The support leg 121 extends to the sliding groove 111, and the limiting protrusion 112 cooperates with the support leg 121. The limiting protrusion 112 forms an effect of limiting the movement of the support leg 121 towards the outside, so that the support leg 121 can only slide along the direction of the sliding groove 111, and is limited in other directions.

[0049] Specifically, as shown in the accompanying drawings, Figures 2-5 As shown, the first support 11 is provided with a first positioning column 113, and the first magnetic yoke 20 is provided with a second positioning column 201. In this embodiment, the number of the first positioning column 113 is two, and the number of the first magnetic yoke 20 is two, that is, two first magnetic yokes 20 have a total of two second positioning columns 201, and the number of the second elastic member 13 is two. The two second elastic members 13 are respectively matched with the first positioning column 113 and the second positioning column 201, that is, one end of the second elastic member 13 is sleeved on the first positioning column 113 and abuts against the bottom surface of the first support 11, and the other end of the second elastic member 13 is sleeved on the second positioning column 201 and abuts against the top surface of the corresponding first magnetic yoke 20.

[0050] Specifically, as shown in the accompanying drawings, Figures 2-5 As shown, the shell 21 is further provided with a fixed block 211, and one end of the guide member 16 cooperates with the fixed block 211, and the other end of the guide member 16 extends along the first direction towards the inner wall side of the shell 21. The fixed block 211 is provided to better realize the fixing effect of the guide member 16, and the fixed block 211 is further provided with a reinforcing rib to improve the strength of the fixed block 211.

[0051] Specifically, the guide piece 16 is provided with a limiting boss 161, the first elastic piece 17 is sleeved on the guide piece 16, one end of the first elastic piece 17 abuts against the limiting boss 161, and the other end of the first elastic piece 17 abuts against the first support 11. The limiting boss 161 better realizes the fixing of the first elastic piece 17, so that the first elastic piece 17 can move more stably in the movement process. In the embodiment, the first elastic piece 17 is a spring.

[0052] Specifically, as shown in the accompanying drawings, Figures 2-5 The moving contact piece 14 is connected with a first magnetic yoke 20, and a second magnetic yoke 22 cooperating with the first magnetic yoke 20 is fixed to the inner wall of the shell 21. When the entire electric circuit is powered, a magnetic field is generated between the first magnetic yoke 20 and the second magnetic yoke 22, and the two magnetic fields are attracted to each other, which can better realize the electrical connection between the moving contact piece 14 and the static contact piece 15 and improve the stability of the connection. In the embodiment, the second magnetic yoke 22 is fixed to the lower inner wall of the shell 21, and one end of the guide piece 16 cooperates with a fixed block 211, and the other end of the guide piece 16 is connected and fixed with the second magnetic yoke 22. In the embodiment, the number of the first magnetic yoke 20 is two, and the two first magnetic yokes 20 correspond to two moving contact pieces 14 respectively. The first magnetic yoke 20 cooperates with the second support 12 to form the fixing of the moving contact piece 14. The first magnetic yoke 20 and the second support 12 can be riveted or connected in other ways.

[0053] Specifically, as shown in the accompanying drawings, Figures 2-5 The second support 12 includes two legs 121 and a fixed part 122, the two ends of the fixed part 122 are connected with the two legs 121 respectively to form a U-shaped structure. The moving contact piece 14 abuts against the top surface of the fixed part 122, and the two ends of the moving contact piece 14 extend to the outside of the fixed part 122. The first magnetic yoke 20 is partially located on the top surface of the moving contact piece 14, and the remaining part of the first magnetic yoke 20 extends to the bottom surface of the fixed part 122, so that the fixed part 122 cooperates with the first magnetic yoke 20 to form a wrapping effect, so that the moving contact piece 14 is fixed and cannot shake.

[0054] Specifically, during the installation process, the first support 11, the second support 12, the second elastic piece 13, the moving contact assembly and the first elastic piece 17 form a module, and then are installed into the shell 21. The modular installation mode realizes the effect of quick installation and fixing, makes the installation more convenient, reduces the assembly difficulty, and improves the processing effect.

[0055] Specifically, the first direction is perpendicular to the horizontal plane, that is, the Z-axis direction.

[0056] Specifically, the first support 11 is made of plastic material, and the first support 11 is suspended and is not connected with the inner wall of the shell 21.

[0057] Specifically, the second support 12 is made of metal conductive material, and the second support 12 is electrically connected with the two movable contact pieces 14.

[0058] Specifically, the first support 11 is provided with a first through hole 114, the second support 12 is provided with a second through hole 123, and the guide piece 16 is fixed with the second magnetic yoke 22 through the first through hole 114 and the second through hole 123. The first support 11 and the second support 12 form a sleeving effect on the guide piece 16, that is, the first support 11 and the second support 12 move along the axial direction of the guide piece 16. During the sliding process, the guide piece 16 will not be broken or have other risks, thereby improving the overall stability. At the same time, the guide piece 16 also forms a connection and fixation between the first support 11 and the second support 12, so that the three form a modular structure, which is convenient for assembly and improves the processing efficiency.

[0059] Specifically, as shown in the accompanying Figures 2-5 It also includes a housing 21, which is provided with a first chamber 212 and a second chamber 213. The first chamber 212 and the second chamber 213 are independently arranged, the magnetic circuit mechanism is accommodated in the first chamber 212, and the static contact assembly is accommodated in the second chamber 213. The independent chambers prevent electrical interference. The first chamber 212 is weak current, and the second chamber 213 is strong current. In this embodiment, the first chamber 212 is located at the top, and the second chamber 213 is located at the bottom. The left side of the first chamber 212 and the second chamber 213 is in communication, and the right side of the first chamber 212 and the second chamber 213 is separated. The magnetic circuit mechanism is located on the right side of the first chamber 212, part of the first support 11 is located on the left side of the first chamber 212, and the rest of the first support 11 is distributed on the left side of the second chamber 213, and the first support 11 can move up and down. The static contact assembly is located on the left side of the second chamber 213, and the static contact assembly is located below the first support 11, forming a diagonal arrangement with the magnetic circuit mechanism. The two are not directly connected, avoiding the risk of electric leakage and creeping. This layout makes the shape of the magnetic latching relay close to a cube, which is suitable for the installation method of the existing electric energy meter. It does not need to adjust the internal layout of the electric energy meter, and has good versatility.

[0060] Specifically, as shown in the accompanying Figure 1As shown, the magnetic circuit mechanism includes a coil assembly 23, an armature assembly 24, a connecting structure, the coil assembly 23 cooperates with the armature assembly 24 to generate a swing force to drive the first support 11 to move. The connecting structure includes a transmission groove 115 arranged at one end of the first support 11, and a push rod 241 arranged on the armature assembly 24 and penetrating into the transmission groove 115, the push rod 241 is formed with a connecting shaft 242 slidingly connected in the transmission groove 115. Directly through the cooperation of the push rod 241 and the transmission groove 115, the distance between the coil assembly 23 and the first support 11 is shortened, thereby reducing the width of the entire magnetic latching relay, thereby meeting the installation of the magnetic latching relay in the electric energy meter. In this embodiment, the magnetic latching relay in the prior art is improved, so it is not possible to increase the length, width and height of the magnetic latching relay in a large range, but only small changes can be made on the basis of the existing. As to why the size cannot be increased in a large range, it is because the internal structure space of the electric energy meter is limited, and the electric energy meter also needs to install components such as mutual inductors and transformers, if the size of the magnetic latching relay is increased, the layout of the entire electric energy meter inside needs to be changed, which is obviously not suitable for the manufacturer.

[0061] Specifically, the transmission groove 115 is open towards the side of the armature assembly 24 and towards the front side, making installation more convenient.

[0062] Specifically, as shown in the accompanying drawings Figures 1-5 As shown, it also includes a shielding cover 25, the shielding cover 25 is sleeved on the outer surface of the shell 21, forming a signal shielding protection effect to prevent interference.

[0063] Specifically, as shown in the accompanying drawings Figure 6 As shown, the shell 21 is provided with a heat dissipation hole 214, the heat dissipation hole 214 is located in the second chamber 213, and the heat dissipation hole 214 penetrates through the front side and the rear side of the second chamber 213. Here, the heat dissipation hole 214 is also located on the right side of the second chamber 213.

[0064] Embodiment 2

[0065] This embodiment provides a magnetic latching relay, as shown in the accompanying drawings Figure 6As shown, the difference between the embodiment 2 and the embodiment 1 is that the first direction is obliquely arranged, that is, the imaginary central axis of the guide 16 is not perpendicular to the horizontal plane, and is obliquely arranged. In this embodiment, the left side of the first chamber 212 is provided with an inclined surface 215, and the first support 11 slides along the first direction, and the inclined surface 215 is parallel to the imaginary central axis of the guide 16, and the angle of the inclined surface 215 is the inclination angle of the first direction. It should be noted that the first support 11 is not connected with the inclined surface 215, and in this embodiment, the first support 11 is also suspended. The oblique arrangement can increase the electrical gap between the two adjacent static contacts 15, and better realize the isolation effect. The part of the two static contacts 15 in the second chamber 213 is also obliquely arranged. When the guide 16 is inclined, the movable contact 14 is also obliquely arranged, and the static contact 15 is also obliquely arranged.

[0066] Specifically, as shown in the accompanying drawings, ​ The housing 21 is also provided, and the housing 21 is provided with an energy storage cavity 216, and the energy storage cavity 216 is arranged above the left side of the first chamber 212. The first elastic member 17 is accommodated in the energy storage cavity 216, and the first elastic member 17 abuts against the end of the guide 16 away from the second support 12. The first elastic member 17 provides auxiliary power when the contact is closed. In this embodiment, the first elastic member 17 is a spring structure.

[0067] Specifically, the yoke of the coil assembly 23 is also obliquely arranged, and the inclination angle of the yoke is consistent with the inclination angle of the guide 16, and the two are parallel to each other.

[0068] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For those skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A magnetic latching relay, characterized by, It includes: The moving contact mechanism includes a first support (11), a second support (12), and a second elastic member (13). One end of the first support (11) is connected with a magnetic circuit mechanism. The magnetic circuit mechanism drives the first support (11) to move back and forth along a first direction. An active stroke is provided between the first support (11) and the second support (12). The first support (11) drives the second support (12) to move along the first direction after overcoming the active stroke during movement. The second support (12) is fixed with a moving contact assembly. The moving contact assembly includes at least two parallel moving contact pieces (14). Both ends of the moving contact piece (14) are provided with moving contact heads (141). The second elastic member (13) is located between the first support (11) and the second support (12). The stationary contact assembly includes a stationary contact piece (15). The stationary contact piece (15) is provided correspondingly with the moving contact piece (14). One end of the stationary contact piece (15) is provided with a stationary contact head (151) matched with the moving contact head (141). The other end of the stationary contact piece (15) extends outward. A guide member (16) passes through the first support (11) and the second support (12). The first support (11) and the second support (12) move relative to the guide member (16). A first elastic member (17) provides auxiliary force to the first support (11).

2. The magnetic latching relay of claim 1, wherein, One of the first support (11) and the second support (12) is provided with a first buckle (18). The other of the first support (11) and the second support (12) is provided with a first clamping groove (19). The first buckle (18) is movable in the first clamping groove (19).

3. The magnetic latching relay of claim 2, wherein, The second support (12) is provided with a support leg (121). The first clamping groove (19) is arranged on the support leg (121). The first support (11) is provided with a sliding groove (111). The side wall of the sliding groove (111) is provided with a limiting protrusion (112). The support leg (121) extends to the sliding groove (111). The limiting protrusion (112) is matched with the support leg (121).

4. The magnetic latching relay of claim 1, wherein, A housing (21) is further included. One end of the guide member (16) is matched with a fixed block (211) of the housing (21). The other end of the guide member (16) extends along the first direction towards one side of the inner wall of the housing (21).

5. The magnetic latching relay of claim 4, wherein, The guide member (16) is provided with a limiting boss (161). The first elastic member (17) is sleeved on the guide member (16). One end of the first elastic member (17) abuts against the limiting boss (161). The other end of the first elastic member (17) abuts against the first support (11).

6. The magnetic latching relay of claim 1, wherein, The moving contact piece (14) is connected with a first magnetic yoke (20). A housing (21) is further included. A second magnetic yoke (22) matched with the first magnetic yoke (20) is fixed on the inner wall of the housing (21).

7. The magnetic latching relay of claim 1, wherein, The first direction is perpendicular to the horizontal plane; or the first direction is inclined, and the device further comprises a shell (21) provided with an energy storage cavity (216), wherein the first elastic member (17) is accommodated in the energy storage cavity (216), and the first elastic member (17) is in abutment with an end of the guide member (16) away from the second support (12).

8. The magnetic latching relay of claim 1, wherein, The magnetic circuit mechanism comprises a coil assembly (23) and an armature assembly (24), and a connecting structure, the coil assembly (23) and the armature assembly (24) cooperate to generate an oscillation force for driving the first support (11) to move; the connecting structure comprises a transmission groove (115) arranged at one end of the first support (11) and a push rod (241) arranged on the armature assembly (24) and penetrating into the transmission groove (115), and the push rod (241) is formed with a connecting shaft (242) slidingly connected in the transmission groove (115).

9. The magnetic latching relay of claim 1, wherein, The device further comprises a shell (21) provided with a first cavity (212) and a second cavity (213), the first cavity (212) and the second cavity (213) are independently arranged, the magnetic circuit mechanism is accommodated in the first cavity (212), and the static contact assembly is accommodated in the second cavity (213).

10. The magnetic latching relay of claim 9, wherein, The second cavity (213) is provided with a heat dissipation hole (214).

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