mechanical switch

Abstract

A mechanical switch, a contact mechanism, an opening coil and a closing coil are arranged in a shell, the contact mechanism comprises a static contact and a movable contact assembly which are spaced and opposite, a repulsion disc is arranged between the opening coil and the closing coil, a steady-state maintaining assembly is further arranged in the shell, the steady-state maintaining assembly comprises a closing magnet, an opening magnet and a magnetic yoke, in a first direction, the closing magnet and the static contact are fixed on the same side wall of the shell, the magnetic yoke is arranged on the movable contact assembly, and the magnetic yoke is located between the opening magnet and the closing magnet, when the movable contact assembly is in a closing position, the movable contact assembly is in contact with the static contact, the closing magnet and the magnetic yoke are attracted, and the movable contact assembly is maintained in the closing position, when the movable contact assembly is in an opening position, the movable contact assembly is separated from the static contact, the opening magnet and the magnetic yoke are attracted, and the movable contact assembly is maintained in the opening position.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a mechanical switch. Background Technology

[0002] A switching device is a device used to control the opening and closing of a circuit. A hybrid solid-state circuit breaker is a type of switching device, which includes a mechanical switch and a power semiconductor connected in parallel. When closing, the power semiconductor is connected first, and the mechanical switch is closed later. When encountering a fault current, the mechanical switch is disconnected before the power semiconductor, so that zero arc is generated in the mechanical switch during the closing and opening process. The opening time of the mechanical switch affects the size and cost of the power semiconductor. The existing mechanical switch uses an electromagnetic mechanism to release the latch and drive the shaft to rotate. This structure has the following defects: First, the opening and closing action is slow and the action time is long, especially when opening, which makes the power semiconductor carry a large current for a long time, which is not conducive to reducing size and cost. Second, the holding force of the mechanical switch when it is stably held in the closed or open position is insufficient, making it difficult to maintain a stable state. Summary of the Invention

[0003] The purpose of this invention is to overcome at least one defect of the prior art and provide a mechanical switch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A mechanical switch includes a housing, within which a contact mechanism, a tripping coil, and a closing coil are disposed. The contact mechanism includes stationary and moving contact assemblies spaced apart from each other. A repulsion disk is disposed between the tripping coil and the closing coil. When energized, the closing coil generates a closing repulsion force with the repulsion disk, and the tripping coil generates a tripping repulsion force with the repulsion disk. The repulsion disk drives the moving contact assembly to move linearly to switch between the closing and opening positions.

[0006] The housing also includes a steady-state holding assembly, which comprises a closing magnet, a opening magnet, and a magnetic yoke. In a first direction, the closing magnet and the stationary contact are fixed to the same side wall of the housing. The magnetic yoke is disposed on the moving contact assembly and is located between the opening magnet and the closing magnet. When the moving contact assembly is in the closed position, it is in contact with the stationary contact, and the closing magnet and the magnetic yoke are attracted to each other, maintaining the moving contact assembly in the closed position. When the moving contact assembly is in the open position, it is separated from the stationary contact, and the opening magnet and the magnetic yoke are attracted to each other, maintaining the moving contact assembly in the open position.

[0007] Preferably, the steady-state holding assembly further includes a steady-state elastic element connected between the moving contact assembly and the housing. The moving contact assembly drives the steady-state elastic element to move between a closed stable position, a neutral position, and a closed stable position. In a first direction, the neutral position is located between the closed stable position and the closed stable position.

[0008] In the closed stable position, the steady-state elastic element provides a closing holding force for the moving contact assembly in the closed position. In the open stable position, the steady-state elastic element provides a opening holding force for the moving contact assembly in the open position. In the neutral position, the elastic force of the steady-state elastic element is perpendicular to the first direction, and the components of the closing holding force and the opening holding force in the first direction are opposite.

[0009] Preferably, the contact mechanism includes at least two stationary contacts, each stationary contact having a stationary contact point, the moving contact assembly includes a moving contact plate, both ends of the moving contact plate having moving contacts corresponding to the stationary contacts, and the magnetic yoke being located between the two moving contacts.

[0010] Preferably, a guide structure is provided between the housing and the moving contact assembly. The guide structure includes a guide post and a guide hole that cooperate with each other, and the guide structure provides sliding guidance for the movement of the moving contact assembly.

[0011] Preferably, the tripping coil and the stationary contact are fixed on the same side of the housing, the closing coil is located inside the housing opposite to the stationary contact, the moving contact plate is located between the closing coil and the tripping coil, a repulsive disk is formed by a portion of the moving contact plate, and the magnetic yoke is fixed to the moving contact plate.

[0012] Preferably, the repulsive disk is formed in the middle region of the moving contact plate, and the magnetic yoke is symmetrically provided on both sides of the moving contact plate of the repulsive disk.

[0013] Preferably, the housing is provided with at least two guide posts, and the movable contact plate is provided with guide holes for the guide posts to slide through, and the guide holes are symmetrically opened at both ends of the movable contact plate.

[0014] Preferably, the moving contact assembly further includes an insulating base, and the moving contact plate, the repulsion disk and the magnetic yoke are respectively disposed on the insulating base.

[0015] Preferably, the closing coil and the opening coil are located on the same side of the moving contact plate opposite to the stationary contact. In the linear movement direction of the moving contact assembly, in a first direction, the stationary contact and the closing magnet are at the same height, and the stationary contact / the closing magnet, the moving contact plate, the opening magnet, the opening coil, the repulsion disk, and the closing coil are arranged in sequence.

[0016] Preferably, the magnetic yoke is fixed between the moving contact plate and the insulating base. The magnetic yoke includes two magnetic yoke plates stacked and fixed to the insulating base. One of the magnetic yoke plates closer to the moving contact plate serves as the closing magnetic yoke, and the other magnetic yoke plate closer to the insulating base serves as the opening magnetic yoke. The two ends of the closing magnetic yoke extend from the two side edges of the moving contact plate toward the closing magnet to form a closing attraction portion. The two ends of the opening magnetic yoke extend toward the opening magnet to form the opening attraction portion.

[0017] Preferably, the middle part of the moving contact plate is elastically connected to the insulating base through a compression spring assembly. When the circuit is closed, the closing magnet attracts the magnetic yoke and drives the insulating base. The compression spring assembly undergoes elastic deformation under the relative movement between the insulating base and the moving contact plate.

[0018] Preferably, the insulating base includes a support plate, the support plate has at least a pair of spaced-apart support sidewalls, the edge of the support sidewalls is provided with a buckle, the edge of the movable contact plate is provided with a groove, the movable contact is assembled on the support plate, and the buckle and the groove cooperate to limit the movement range of the movable contact plate.

[0019] Preferably, the compression spring assembly includes a connecting shaft and a contact spring. One end of the connecting shaft slides through the movable contact plate, allowing the movable contact plate to slide between the two ends of the connecting shaft. The contact spring is sleeved on the outside of the connecting shaft and is located between the movable contact plate and the insulating seat.

[0020] Preferably, the insulating seat has at least two guide posts on the side opposite to the stationary contact, and the guide posts slide through guide holes in the housing.

[0021] The mechanical switch of this utility model uses a magnet and a yoke that attract each other to maintain a steady state. This not only provides additional driving force during the movement of the moving contact assembly, improving the opening and closing speed of the moving contact assembly, but also keeps the moving contact assembly in a stable state after it has moved into place, thus improving the overall stability. At the same time, the magnet and yoke have the advantages of simple structure, convenient assembly, and small space occupation.

[0022] In addition, by adding a steady-state elastic element, the steady-state holding component can not only improve the opening and closing speed, but also further improve the stability of the contact mechanism.

[0023] In addition, the magnetic yoke can be positioned flexibly, either on the moving contact plate to save internal space or on the insulating base to avoid affecting the moving contact plate; at the same time, the repulsion disk can also be placed directly on the moving contact plate or on the insulating base, which can adapt to products with different needs.

[0024] In addition, a compression spring assembly is installed between the moving contact plate and the insulating base. The moving contact plate and the insulating base undergo elastic deformation under relative movement, thereby achieving overtravel during closing and optimizing product performance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the mechanical switch in the first embodiment of this utility model;

[0026] Figure 2 This is a cross-sectional view of the first embodiment of this utility model when the circuit is closed;

[0027] Figure 3 This is a cross-sectional view of the first embodiment of this utility model during circuit breaking;

[0028] Figure 4 This is an exploded view of the first embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the second sub-shell, the trip coil, and the closing magnet in the first embodiment of this utility model;

[0030] Figure 6 yes Figure 5 A schematic diagram of the decomposed structure;

[0031] Figure 7 This is a schematic diagram of the structure of the second housing, closing coil, and opening magnet in the first embodiment of this example;

[0032] Figure 8 yes Figure 7 A schematic diagram of the decomposed structure;

[0033] Figure 9 This is a schematic diagram of the structure of the moving contact plate and the magnetic yoke in the first embodiment of this example;

[0034] Figure 10 yes Figure 9 A schematic diagram of the decomposed structure;

[0035] Figure 11 These are schematic diagrams of the second and third embodiments of this utility model;

[0036] Figure 12 This is a cross-sectional view of the second embodiment of this utility model when the circuit is closed;

[0037] Figure 13 yes Figure 12 Enlarged view of part A in the middle;

[0038] Figure 14 This is a cross-sectional view of the second embodiment of this utility model during circuit breaking;

[0039] Figure 15 This is an exploded structural diagram of the second embodiment of this utility model;

[0040] Figure 16 This is a schematic diagram of the sub-shell structure in the second embodiment of this utility model;

[0041] Figure 17 This is a schematic diagram of the moving contact assembly and the repulsion disk in the second embodiment of this utility model;

[0042] Figure 18 yes Figure 17 A schematic diagram of the decomposed structure;

[0043] Figure 19 This is a schematic diagram of the structure of the insulating base in the second embodiment of this utility model. Figure 1 ;

[0044] Figure 20 This is a schematic diagram of the structure of the insulating base in the second embodiment of this utility model. Figure 2 ;

[0045] Figure 21 This is a cross-sectional view of the third embodiment of this utility model when the circuit is closed;

[0046] Figure 22 This is a cross-sectional view of the steady-state elastic element in the third embodiment of this utility model when it is in the neutral position;

[0047] Figure 23 This is a cross-sectional view of the third embodiment of this utility model during circuit breaking;

[0048] Figure label:

[0049] 1-Housing, 101-Contact cavity, 102-Drive cavity, 11-First sub-housing, 12-Second sub-housing, 13-Partition plate, 14-Coil mounting slot, 15-Magnet mounting slot, 16-Receiving slot, 17-Stationary contact mounting slot, 21-Stationary contact, 210-Stationary contact plate, 211-Stationary contact point, 22-Moving contact, 220-Moving contact plate, 221-Moving contact point, 222-Slot, 23-Insulating base, 231-Bearing plate, 232-Magnetic yoke through Hole, 233-Snap fastener, 234-Spring groove, 235-Washer groove, 236-Nut groove, 24-Compression spring assembly, 241-Connecting shaft, 242-Contact spring, 243-Elastic washer, 31-Closing coil, 32-Opening coil, 33-Repulsion disk, 41-Magnetic yoke, 411-Closing magnetic yoke, 412-Opening magnetic yoke, 421-Closing magnet, 422-Opening magnet, 43-Stable elastic element, 51-Guide hole, 52-Guide post. Detailed Implementation

[0050] The specific embodiments of the mechanical switch of this utility model are further described below with reference to the accompanying drawings. The mechanical switch of this utility model is not limited to the descriptions in the following embodiments.

[0051] like Figure 1-3 As shown in Figures 11, 12, 14, and 15, the mechanical switch includes a housing 1, within which a contact mechanism and an electromagnetic drive assembly are disposed. The contact mechanism controls the connection and disconnection of the circuit. The contact mechanism includes stationary contacts 21 and a moving contact assembly spaced apart from each other. The stationary contacts 21 are provided with stationary contact points 211, and the moving contact assembly includes a moving contact plate 220 (see Figure 1). Figure 9 The moving contact plate 220 is provided with a moving contact 221 that cooperates with the stationary contact 211; the electromagnetic drive assembly includes a tripping coil 32, a closing coil 31, and a repulsion disk 33. The tripping coil 32 and the closing coil 31 are spaced apart, and the repulsion disk 33 is located between the closing coil 31 and the tripping coil 32. The repulsion disk 33 drives the moving contact assembly to move in a straight line. When the closing coil 31 is energized, the repulsion disk 33 induces eddy currents, which generates a repulsive force between the closing coil 31 and the repulsion disk 33, thereby driving the moving contact assembly to move closer to the stationary contact 21 until the contact mechanism closes. The moving contact assembly moves to the closed position where it contacts the stationary contact 21. When the tripping coil 32 is energized, the repulsion disk 33 induces eddy currents, which generates a repulsive force between the tripping coil 32 and the repulsion disk 33, thereby driving the moving contact assembly to move away from the stationary contact 21, causing the contact mechanism to open, and the moving contact assembly moves to the open position.

[0052] For ease of description, the height, length, and width directions of shell 1 are respectively referred to as the first direction, the second direction, and the third direction, which are perpendicular to each other. Figure 1 , 11 In the diagram, the directions of the Y-axis, X-axis, and Z-axis represent the first direction, the second direction, and the third direction. The moving contact assembly and the stationary contact 21 are spaced apart and opposite each other in the first direction. The closing coil 31 and the opening coil 32 are spaced apart and opposite each other in the first direction. The moving contact assembly moves along the first direction.

[0053] like Figure 2 , 9As shown in Figures 12 and 21, the improvement of this application lies in that a steady-state holding assembly is further provided inside the housing 1. The steady-state holding assembly includes a closing magnet 421, a opening magnet 422, and a magnetic yoke 41. The closing magnet 421 and the stationary contact 21 are fixed on the same side wall of the housing 1. The magnetic yoke 41 is disposed on the moving contact assembly and is located between the opening magnet 422 and the closing magnet 421, for engaging with the closing magnet 421 or the opening magnet 422 respectively. 2. When the moving contact assembly is in the closed position, it contacts the stationary contact 21, and the magnetic yoke 41 can be attracted to the closing magnet 421. After the closing coil 31 is de-energized, the moving contact assembly is maintained in the closed position. When the moving contact assembly is in the open position, it separates from the stationary contact 21, and the magnetic yoke 41 can be attracted to the opening magnet 422. After the opening coil 32 is de-energized, the moving contact assembly is maintained in the open position.

[0054] Thus, the steady-state holding component uses mutually attractive magnets and yokes 41, which can provide additional driving force during the movement of the moving contact component, thereby improving the opening and closing speed of the moving contact component. It can also keep the moving contact component in a stable state after it has moved into place, thereby improving the overall stability. At the same time, the magnets and yokes 41 have the advantages of simple structure, convenient assembly and small space occupation.

[0055] Furthermore, such as Figure 21-23 As shown, the steady-state holding assembly also includes a steady-state elastic element 43, which is connected between the moving contact assembly and the housing 1. After the moving contact assembly drives the steady-state elastic element 43 past the neutral position, it can remain stationary in either the closed stable position or the open stable position. The steady-state elastic element 43, stationary in either the closed or open stable position, can provide a holding force for the moving contact assembly. Specifically, in the neutral position, the direction of the force exerted by the steady-state elastic element 43 is perpendicular to the direction of movement of the moving contact assembly; that is, the elastic force of the steady-state elastic element 43 is perpendicular to the first direction. After passing the neutral position, the direction of the force exerted by the steady-state elastic element 43 is perpendicular to the direction of movement of the moving contact assembly. The moving direction of the head assembly is at an angle, enabling the stabilizing elastic element to generate a component force in the same direction as the moving contact assembly. This component force provides additional driving force during the movement of the moving contact assembly. When the moving contact assembly is in place, the steady-state elastic element 43 remains stationary in the closed or open stable position. The component force in the same direction as the moving contact assembly can further maintain the stability of the contact mechanism. Specifically, in the closed stable position, the steady-state elastic element 43 provides a closing holding force for the moving contact assembly in the closed position, and in the open stable position, the steady-state elastic element 43 provides an opening holding force for the moving contact assembly in the open position.

[0056] Preferably, the magnetic yoke 41 that cooperates with the closing magnet 421 and the opening magnet 422 can be disposed on the moving contact plate 220. Of course, when the moving contact assembly includes a support structure that can support the moving contact plate 220, the magnetic yoke 41 can also be disposed on the support structure. In addition, the repulsion disk 33 can also be disposed on the moving contact plate 220 and integrally formed with the moving contact plate 220, or the repulsion disk 33 can be disposed separately from the moving contact plate 220 and disposed on the support structure, which can meet different product requirements.

[0057] Preferably, a guide structure is provided between the housing 1 and the moving contact assembly. The guide structure includes a guide post 52 and a guide hole 51 that cooperate with each other. The guide structure provides a sliding guide for the movement of the moving contact assembly, ensuring that the movement trajectory of the moving contact assembly will not deviate.

[0058] Combination Figure 1-10 A specific embodiment of the first type of mechanical switch is provided.

[0059] like Figure 1-4 As shown in Figures 9 and 10, the mechanical switch includes a housing 1. Inside the housing 1 are a contact mechanism, an electromagnetic drive assembly, and a steady-state holding assembly. The contact mechanism includes two stationary contacts 21 and a moving contact assembly. The two stationary contacts 21 are fixed within the housing 1 along a second direction. The moving contact assembly is spaced apart from the two stationary contacts 21 in a first direction. Each stationary contact 21 includes a stationary contact plate 210, which is arranged along the second direction. One end of the stationary contact plate 210 has a stationary contact point 211, and the other end extends outside the housing 1 and has a wiring hole. The moving contact assembly includes a moving contact plate 220, with moving contacts 22 at both ends that cooperate with the stationary contacts 211. 1; The electromagnetic drive assembly includes a closing coil 31, a closing coil 32, and a repulsion disk 33. The steady-state holding assembly includes a closing magnet 422, a closing magnet 421, and a magnetic yoke 41. The closing coil 32, the closing magnet 421, and the two stationary contacts 21 are fixed on the same side wall of the housing 1. The closing coil 31 and the closing magnet 422 are jointly disposed on the other side wall of the housing 1. The closing coil 31 and the closing coil 32 are spaced apart and opposite each other in the first direction. The closing magnet 422 and the closing magnet 421 are spaced apart and opposite each other in the first direction. The repulsion disk 33 and the magnetic yoke 41 are jointly disposed on the moving contact plate 220. All three are located between the closing coil 31 and the opening coil 32.

[0060] like Figure 2 , 9As shown in Figure 10, when the contact mechanism is closed, the closing magnet 421 and the yoke 41 are attracted to each other, so that the moving contact assembly and the stationary contact 21 are kept in a closed state of mutual contact. When the opening coil 32 is energized, the repulsion disk 33 generates eddy currents, and an opening repulsion force is generated between the repulsion disk 33 and the opening coil 32. After the opening repulsion force overcomes the magnetic force between the closing magnet 421 and the yoke 41, the moving contact assembly is driven to move away from the stationary contact 21 along the first direction. During this process, the magnetic force between the opening magnet 422 and the yoke 41 can also further drive the moving contact assembly. Finally, the opening magnet 422 and the yoke 41 are attracted to keep the contact mechanism in the open state.

[0061] like Figure 3 , 9 As shown in Figure 10, when the contact mechanism is open, the opening magnet 422 and the yoke 41 are attracted to each other, keeping the moving contact assembly and the stationary contact 21 in a closed state. When the opening coil 32 is energized, the repulsion disk 33 generates eddy currents, generating a closing repulsion force between the repulsion disk 33 and the closing coil 31. After the closing repulsion force overcomes the magnetic force between the opening magnet 422 and the yoke 41, the moving contact assembly is driven to move along the first direction toward the stationary contact 21. During this process, the magnetic force between the closing magnet 421 and the yoke 41 can also further drive the moving contact assembly. Finally, the closing magnet 421 and the yoke 41 are attracted to keep the contact mechanism in a closed state.

[0062] In this embodiment, a guide structure is disposed between the housing 1 and the movable contact plate 220, a guide post 52 is disposed on the inner side wall of the housing 1, and a guide hole 51 is opened on the movable contact plate 220.

[0063] Combination Figure 1-8 A housing 1 structure is provided for application in this embodiment.

[0064] like Figure 2-8 As shown, the housing 1 includes a first sub-housing 11 and a second sub-housing 12 assembled along a first direction. The first sub-housing 11 includes a support plate, which is a rectangular plate with a certain thickness. A circular groove is provided in the middle of the first sub-housing 11, which serves as a coil mounting groove 14 for mounting the switching coil 31. Rectangular bosses are provided on opposite sides of the coil mounting groove 14. A strip-shaped slot is provided at the connection between the rectangular bosses and the support plate, which serves as a magnet mounting groove 15. In the third direction, the two ends of the magnet mounting groove 15 are open to facilitate the insertion of the switching magnet 422. Figure 7 , 8In the middle, the length of the rectangular boss in the third direction is less than the length of the strip slot; multiple guide posts 52 are provided on the support plate, preferably, the guide posts 52 are symmetrically distributed on opposite sides of the coil mounting slot 14, and in the second direction, the magnet mounting slot 15 is located between the guide posts 52 and the coil mounting slot 14. Figure 7 , 8 There are four guide pillars 52 in total, but more or fewer can be set as needed; in addition, multiple fixing holes can be set along the edge of the support plate.

[0065] like Figure 4-6 As shown, the second housing 12 has a housing structure with a cavity that provides space for the contact mechanism to move. A circular groove is provided in the center of the top wall of the cavity. This circular groove serves as a coil mounting groove 14 for assembling the opening coil 32. In the second direction, a rectangular groove serving as a magnet mounting groove 15 is provided on each side of the coil mounting groove 14. Each magnet mounting groove 15 is used to fix and install the closing magnet 421. The second housing 12 also has two stationary contact mounting grooves 17. In the second direction, the two stationary contact mounting grooves 17 are symmetrically distributed on opposite sides of the coil mounting groove 14, and the magnet mounting groove 15 is located between one stationary contact mounting groove 17 and the coil mounting groove 14. The end of each stationary contact mounting groove 17 away from the magnet mounting groove 15 is connected to the outside. Multiple fixing holes can be provided around the edge of the second housing 12.

[0066] When the second sub-shell 12 is mounted on the first sub-shell 11 along the first direction, the coil mounting groove 14 of the first sub-shell 11 is directly opposite to the coil mounting groove 14 on the second sub-shell 12, and the magnet mounting groove 15 of the first sub-shell 11 corresponds one-to-one with the magnet mounting groove 15 of the second sub-shell 12. The fixing holes of the first sub-shell 11 and the second sub-shell 12 correspond to each other and are fitted with fasteners, thereby forming the shell 1 into a whole. The moving contact assembly moves linearly inside the shell 1. In this embodiment, the closing coil 31 and the opening magnet 422 are respectively assembled in the coil mounting groove 14 and the magnet mounting groove 15 of the first sub-shell 11, and the opening coil 32 and the closing magnet 421 are respectively assembled in the coil mounting groove 14 and the magnet mounting groove 15 of the second sub-shell 12.

[0067] Combination Figure 2-6 9 and 10 provide a structure for the stationary contact 21 and the moving contact assembly used in this embodiment.

[0068] like Figure 2-6 As shown, the stationary contact 21 includes a stationary contact plate 210. Figure 6The stationary contact plate 210 is a strip-shaped plate. The stationary contact plate 210 is inserted into a stationary contact mounting groove 17 along the second direction. One end of the stationary contact plate 210 is located inside the housing 1 and is provided with a stationary contact point 211, while the other end is located outside the housing 1 and is provided with a wiring hole.

[0069] like Figure 9 , 10 As shown, the moving contact assembly includes a moving contact plate 220, which is generally strip-shaped. A moving contact point 221 is provided at each end of the moving contact plate 220. The opposite sides of both ends of the moving contact plate 220 extend outwards to form extensions, each extension having a guide hole 51. Preferably, at the same end of the moving contact plate 220, the moving contact point 221 is located between two guide holes 51, and the distance from each guide hole 51 to the moving contact point 221 is equal. Each guide hole 51 is slidably engaged with a guide post 52 of the first sub-shell 11. The central edge extends to both sides, forming an annular region in the center of the moving contact plate 220. This annular region serves as the repulsion disk 33 in the steady-state holding assembly; that is, the repulsion disk 33 is part of the moving contact plate 220. Preferably, the outer diameters of the repulsion disk 33, the closing coil 31, and the opening coil 32 are equal, and they are coaxial. Alternatively, the repulsion disk 33 in this embodiment can also be set separately. The arrangement of the repulsion disk 33 is described in the second and third embodiments below. The position of the repulsion disk 33 preferably corresponds to the center of the moving contact plate 220, which helps to ensure force balance. Furthermore, when the repulsion disk 33 is set separately, a compression spring assembly 24 can be configured in the moving contact assembly. During closing, the compression spring assembly 24 can provide overtravel for the moving contact assembly plate.

[0070] like Figure 9 , 10 As shown, the magnetic yoke 41 is assembled on the moving contact plate 220 and fixed between the repulsion disk 33 and the end of the moving contact plate 220. In this embodiment, the magnetic yoke 41 is a U-shaped body, including a pair of sidewalls and a fixed wall connected between the pair of sidewalls. The two sidewalls extend from both sides of the moving contact plate 220 along a first direction, and the fixed wall is fixedly connected to the moving contact plate 220. The ends of the two sidewalls are used to engage with the closing magnet 421, and the fixed wall is used to engage with the opening magnet 422. Of course, the magnetic yoke 41 can also adopt other structures, or the magnetic yoke 41 can be divided into a closing magnetic yoke 411 and an opening magnetic yoke 412.

[0071] Combination Figure 11-20 A specific embodiment of the second type of mechanical switch is provided.

[0072] like Figure 11-15As shown in Figures 17 and 18, the mechanical switch includes a housing 1. The housing 1 contains a contact mechanism, an electromagnetic drive assembly, and a steady-state holding assembly. The contact mechanism includes two stationary contacts 21 and a moving contact assembly. The two stationary contacts 21 are fixed within the housing 1 along a second direction. The moving contact assembly is spaced apart from the two stationary contacts 21 in a first direction. Each stationary contact 21 adopts the same structure as in the first embodiment. The moving contact assembly includes a moving contact plate 220 and an insulating seat 23. The insulating seat 23, as a support structure for the moving contact plate 220, is slidably mounted within the housing 1. The electromagnetic drive assembly includes a closing coil 31, a opening coil 32, and a repulsion disk 33. The steady-state holding assembly includes a closing magnet 421, an opening magnet 422, and a yoke 41. The yoke 41 is divided into a closing yoke 411 and an opening yoke 412 (see Figure 1). Figure 17 , 18 In this embodiment, the opening coil 32 and the closing magnet 421 are jointly disposed on the same side wall of the housing 1 in the first direction, and the closing coil 31 and the opening magnet 422 are jointly disposed on the other side wall of the housing 1. In this embodiment, the housing 1 includes two sub-housings that cover each other in the third direction. In the third direction, the opening coil 32, the closing magnet 421, the closing coil 31, and the opening magnet 422 are each installed in one of the two sub-housings. Taking the opening coil 32 as an example, in the third direction, half of the opening coil 32 is installed on one sub-housing and the other half is installed on the other sub-housing (see...). Figure 15 The closing coil 31 and the opening coil 32 are spaced apart and opposite each other in the first direction. The repulsion disk 33, the opening magnetic yoke 412 and the closing magnetic yoke 411 are all disposed on the insulating base 23, and the repulsion disk 33 is located between the closing coil 31 and the opening coil 32.

[0073] Furthermore, the closing coil 31 and the opening coil 32 are located on the same side of the moving contact plate 220 opposite to the stationary contact 21. That is, in this embodiment, in the first direction, the stationary contact 21 and the closing magnet 421 are at the same height. The stationary contact 21 / closing magnet 421, the moving contact plate 220, the opening magnet 422, the opening coil 32, the repulsion disk 33, and the closing coil 31 are arranged in sequence. Of course, as another embodiment, the opening magnet 422, the moving contact plate 220, the stationary contact 21, the closing coil 31, the repulsion disk 33, and the opening coil 32 can also be arranged in sequence in the first direction, so that the moving contact plate 220 and the repulsion disk 33 can move in different areas to avoid mutual interference.

[0074] Preferably, the internal space of the housing 1 is divided into a contact cavity 101 and a drive cavity 102. The contact mechanism is disposed in the contact cavity 101, and the electromagnetic drive assembly is disposed in the drive cavity 102. The contact cavity 101 and the drive cavity 102 provide moving space for the moving contact plate 220 and the repulsion disk 33, respectively, effectively separating the contact mechanism and the electromagnetic drive assembly, which is conducive to realizing the separation of strong and weak currents.

[0075] Furthermore, such as Figure 12 , 14 As shown in Figure -18, the guide structure is set between the housing 1 and the insulating base 23. The guide post 52 is set on the insulating base 23, and the guide hole 51 is opened on the partition 13, so that the guide post 52 can slide through the guide hole 51. The partition 13 forms a contact cavity 101 and a drive cavity 102 in the housing 1, which can separate the contact mechanism and the electromagnetic drive assembly into two relatively independent spaces, realizing the separation of strong and weak currents.

[0076] Furthermore, the separation of the contact cavity 101 from the drive cavity 102 allows the contact cavity 101 to have a relatively large capacity, so that when the mechanical switch needs to be equipped with an arc extinguishing system, the arc extinguishing system can be installed inside the contact cavity 101.

[0077] Combination Figure 11 , 12 Articles 14-16 provide a housing 1 structure applicable to this application.

[0078] like Figure 11 , 12 As shown in Figures 1, 13, and 16, the housing 1 has an overall rectangular structure. Inside the housing 1, there is a partition 13, which divides the internal space of the housing 1 into a contact cavity 101 and a drive cavity 102. The contact cavity 101 and the drive cavity 102 are distributed along a first direction. The contact cavity 101 is used to assemble the contact mechanism, and the drive cavity 102 is used to assemble the electromagnetic drive assembly.

[0079] like Figure 16 As shown, a stationary contact mounting groove 17 is provided in the contact cavity 101. In the figure, the stationary contact mounting groove 17 is located on the side of the contact cavity 101 away from the drive cavity 102. Preferably, the stationary contact mounting groove 17 has an opening on the adjacent side wall so that one end of the stationary contact 21 can extend out of the housing 1 from the opening. Two magnet mounting grooves 15 are provided in the contact cavity 101. The two magnet mounting grooves 15 are spaced apart in the first direction. In the second direction, one magnet mounting groove 15 is located between the two stationary contact mounting grooves 17, and the other magnet mounting groove 15 is provided on the partition plate 13. In this embodiment, the magnet mounting groove 15 between the stationary contact mounting grooves 17 is used to assemble the closing magnet 421, and the magnet mounting groove 15 on the partition plate 13 is used to assemble the opening magnet 422.

[0080] A coil mounting slot 14 is provided within the drive cavity 102. One coil mounting slot 14 is located on the side of the drive cavity 102 away from the partition 13, and the other coil mounting slot 14 is located on the partition 13. Preferably, the magnet mounting slot 15 on the partition 13 is isolated from the coil mounting slot 14. In this embodiment, the opening coil 32 is assembled in the coil mounting slot 14 on the partition 13, and the closing coil 31 is assembled in the coil mounting slot 14 away from the partition 13. In addition, a guide hole 51 is also provided on the partition 13. The guide hole 51 connects the contact cavity 101 and the drive cavity 102 in a first direction, and the central axis of the guide hole 51 is parallel to the first direction. In a second direction, at least one guide hole 51 is provided on each of the opposite sides of the coil mounting slot 14 (magnet mounting slot 15).

[0081] Furthermore, both the coil mounting groove 14 and the magnet mounting groove 15 are enclosed in the inner wall of the housing 1 or in the partition 13, which helps to improve the isolation effect and avoid mutual interference. Preferably, the housing 1 includes a first sub-housing 11 and a second sub-housing 12 assembled along a third direction. The first sub-housing 11 and the second sub-housing 12 have a symmetrical structure. The partition 13, the coil mounting groove 14, the magnet mounting groove 15 and the guide hole 51 are all formed by the first sub-housing 11 and the second sub-housing 12 joined together. The openings of the coil mounting groove 14 and the magnet mounting groove 15 are located at the joint of the first sub-housing 11 and the second sub-housing 12, which facilitates the installation of the coil and the magnet.

[0082] In this embodiment, the stationary contact 21 in the contact mechanism adopts the same structure as in the first embodiment, combined with Figure 12 , 14 15, 17 and 18 provide a structure for a moving contact assembly used in this embodiment.

[0083] like Figure 15 , 17 As shown in Figure 18, the moving contact assembly includes a moving contact plate 220, an insulating base 23, and a spring assembly 24. The middle part of the moving contact plate 220 is elastically connected to the insulating base 23 through the spring assembly 24. When the circuit is closed, the spring assembly 24 causes the insulating base 23 and the moving contact plate 220 to move relative to each other in a first direction, thereby achieving overtravel and optimizing product performance. Of course, as another embodiment, the spring assembly 24 can be omitted, and the moving contact plate 220 can be directly fixed on the insulating base 23.

[0084] The movable contact plate 220 is generally strip-shaped, with a movable contact 221 at each end. Each movable contact 221 corresponds to a stationary contact 211. The edge of the movable contact plate 220 is provided with a slot 222. Figure 17 , 18In this embodiment, slots 222 are provided at the four corners of the movable contact plate 220, and a through hole is provided in the middle of the movable contact plate 220. The through hole is used to assemble the compression spring assembly 24. In this embodiment, the through hole is a stepped hole. The thicker end of the through hole is located on the side opposite to the insulating base 23, and the thinner end of the through hole is located on the side close to the insulating base 23.

[0085] like Figure 17-20 As shown, the insulating base 23 includes a support plate 231. One side of the support plate 231 is provided with at least a pair of spaced-apart support sidewalls. The edge of the support sidewall is provided with a buckle 233, so that the buckle 233 and the support plate 231 are spaced-apart from each other in a first direction. When the movable contact plate 220 is disposed on the support plate 231, the buckle 233 corresponds to the slot 222. The buckle 233 can limit the movement stroke of the movable contact plate 220.

[0086] like Figure 19 , 20 As shown, a magnetic yoke mounting groove is provided in the middle of the bearing plate 231. The magnetic yoke mounting groove is generally strip-shaped. Two magnetic yoke through holes 232 are opened at the bottom of the magnetic yoke mounting groove, and each magnetic yoke through hole 232 penetrates the bearing plate 231. The bearing plate 231 is also provided with two circular mounting platforms. In the second direction, the mounting platforms are located between the magnetic yoke 41 mounting groove and the bearing side wall. Each mounting platform has a through hole in the middle. The surface of the mounting platform has two annular grooves concentric with the through hole. The annular groove with a larger diameter serves as a spring groove 234, and the annular groove with a smaller diameter serves as a gasket groove 235. The groove depth of the gasket groove 235 is less than the groove depth of the spring groove 234. A nut groove 236 is provided at the end of the through hole away from the mounting platform. A nut is assembled in the nut groove 236.

[0087] like Figure 20 As shown, at least two guide posts 52 are provided on the other side of the support plate 231. The at least two guide posts 52 are spaced apart from each other in the second direction. Each guide post 52 slides through a guide hole 51 on the partition plate 13, so that the guide post 52 slides through the contact cavity 101 and the drive cavity 102 in the first direction. In this embodiment, there are two guide posts 52, which are symmetrically arranged on opposite sides of the support plate 231. Each guide post 52 has a mounting hole in the middle. Each mounting hole is coaxial with the guide post 52. By setting fasteners in the guide posts 52, the repulsion disk 33 can be fixed on the insulating seat 23. The guide post 52 and the fastener are integrated into one piece to avoid occupying too much space.

[0088] The compression spring assembly 24 includes a connecting shaft 241, a contact spring 242, and an elastic washer 243. The contact spring 242 and the elastic washer 243 are respectively installed in the spring groove 234 and the washer groove 235 of the bearing plate 231. The connecting shaft 241 passes through the through hole of the moving contact plate 220 and the through hole of the mounting platform in sequence, and is threadedly connected to the nut in the nut groove 236. In this embodiment, the connecting shaft 241 is a stepped shaft with one end thicker than the other. The thicker end of the connecting shaft 241 protrudes in the circumferential direction to form a positioning platform. The positioning platform slides with the thicker area in the through hole. That is, in the open state, the bottom surface of the positioning platform is in contact with the bottom surface of the thicker area in the through hole. In the closed state, a certain gap is left between the bottom surface of the positioning platform and the bottom surface of the thicker area in the through hole. This gap is the overtravel distance. Figure 13 The connecting shaft 241, marked with the letter D, has its thinner end threaded into the nut in the nut groove 236. A contact spring 242 is fitted on the outside of the connecting shaft 241. The two ends of the contact spring 242 abut against the moving contact plate 220 and the spring groove 234, respectively. The stepped surface in the middle of the connecting shaft 241 can elastically abut against the elastic washer 243.

[0089] Combination Figure 12-15 An electromagnetic drive component and a steady-state holding component are provided for use in this embodiment, such as Figure 12 , 14 As shown in Figure 15, the electromagnetic drive assembly includes a closing coil 31, a closing coil 32, and a repulsion disk 33. The closing coil 31 and the closing coil 32 are arranged at intervals opposite to each other in the drive cavity 102 in the first direction. The closing coil 31 is arranged in the coil mounting groove 14 of the drive cavity 102 away from the contact cavity 101, and the closing coil 32 is arranged in the coil mounting groove 14 of the partition plate 13. In the first direction, the repulsion disk 33 is located in the drive cavity 102 between the closing coil 31 and the closing coil 32. In this embodiment, the repulsion disk 33 includes a disc body, and connecting plates are formed on opposite sides of the disc body. Each connecting plate is provided with a mounting hole corresponding to the guide post 52, so that the repulsion disk 33 can be fixed on the guide post 52.

[0090] The steady-state holding assembly includes a closing magnet 421, a opening magnet 422, and a yoke 41. The closing magnet 421 is disposed in a magnet mounting groove 15 between two stationary contact mounting grooves 17, the opening magnet 422 is disposed in a magnet mounting groove 15 in the partition plate 13, and the yoke 41 is fixed on the insulating seat 23 of the moving contact 22 and is fixed between the moving contact plate 220 and the insulating seat 23. The yoke 41 is divided into a closing yoke 411 and an opening yoke 412.

[0091] Specifically, the magnetic yoke 41 includes two magnetic yoke plates stacked and fixed to the insulating base 23. The middle of the two magnetic yoke plates is fixed. The magnetic yoke plate closer to the moving contact plate 220 is the closing magnetic yoke 411, and the magnetic yoke plate closer to the insulating base 23 is the opening magnetic yoke 412. The two ends of the closing magnetic yoke 411 extend from the two sides of the moving contact plate 220 toward the closing magnet 421 to form a closing attraction part. The two ends of the opening magnetic yoke 412 extend from the two sides of the moving contact plate 220 toward the opening magnet 422 to form an opening attraction part. In the figure, the opening attraction part passes through the magnetic yoke through hole 232 on the bearing plate 231.

[0092] Combination Figure 12-14 Briefly describe the opening and closing process of the contact mechanism in this embodiment:

[0093] like Figure 12 As shown, when the contact mechanism closes, the closing magnet 421 and the closing yoke 411 are attracted, keeping the moving contact assembly and the stationary contact 21 in a closed state of mutual contact. Simultaneously, the attraction between the closing magnet 421 and the closing yoke 411 overcomes the elastic force of the contact spring 242 in the compression spring assembly 24, allowing the moving contact plate 220 to move further towards the stationary contact 21 relative to the insulating base 23 in the first direction, achieving closing overtravel. When the opening coil 32 is energized, the repulsion plate... Eddy currents are generated at 33, which generate a repulsive force between the repulsive disk 33 and the trip coil 32. After the repulsive force overcomes the magnetic force between the closing magnet 421 and the closing yoke 411, the moving contact assembly is driven to move away from the stationary contact 21 along the first direction. During this process, the magnetic force between the trip magnet 422 and the trip yoke 412 can also further drive the moving contact assembly. Finally, the trip magnet 422 and the trip yoke 412 attract each other to keep the contact mechanism in the tripped state.

[0094] like Figure 14 As shown, when the contact mechanism is open, the opening magnet 422 and the opening yoke 412 are attracted to each other, keeping the moving contact assembly and the stationary contact 21 in a separated open state. When the closing coil 31 is energized, the repulsion disk 33 generates eddy currents, generating a closing repulsion force between the repulsion disk 33 and the closing coil 31. After the closing repulsion force overcomes the magnetic force between the opening magnet 422 and the opening yoke 412, the moving contact assembly is driven to move along the first direction toward the stationary contact 21. During this process, the magnetic force between the closing magnet 421 and the closing yoke 411 can also further drive the moving contact assembly. Finally, the closing magnet 421 and the closing yoke 411 are attracted to keep the contact mechanism in the closed state.

[0095] Combination Figure 11 , 21 -23 provides a specific embodiment of a third type of mechanical switch.

[0096] like Figure 11 As shown, the mechanical switch includes a housing 1, and a contact mechanism, an electromagnetic drive assembly, and a steady-state holding assembly are provided inside the housing 1. The housing 1, contact mechanism, and electromagnetic drive assembly in this embodiment are the same as those in the second embodiment. The steady-state holding assembly in this embodiment is further improved by adding a steady-state elastic element 43 based on the second embodiment.

[0097] like Figure 21-23 As shown, the steady-state holding assembly includes a closing magnet 421, a closing magnet 422, a closing yoke 411, a closing yoke 412, and a steady-state elastic element 43. The closing magnet 421, the closing magnet 422, the closing yoke 411, and the closing yoke 412 adopt the structure and assembly method of the second embodiment. The number of steady-state elastic elements 43 is at least two. The steady-state elastic element 43 is preferably a linear spring. The two ends of each steady-state elastic element 43 are respectively connected between the moving contact assembly and the housing 1. All steady-state elastic elements 43 form a centrally symmetrical structure about the axis of the moving contact assembly.

[0098] This embodiment will be described in detail with two steady-state elastic elements 43, such as... Figure 21-23 As shown, two steady-state elastic components are spaced apart in the second direction. One end of each steady-state elastic element 43 is connected to the insulating seat 23, and the other end is connected to the inner sidewall of the housing 1. Preferably, the inner sidewall of the housing 1 may be provided with a receiving groove 16 for accommodating the steady-state elastic element 43. In the figure, the openings of the two receiving grooves 16 face the moving contact assembly, and the inner diameter of the opening of the receiving groove 16 is larger than the inner diameter of the bottom of the receiving groove 16, so that the sidewall of the receiving groove 16 is an inclined sidewall.

[0099] When the moving contact assembly is driven to move in a straight line by the repulsion disk 33, the moving contact assembly can drive each steady-state elastic element 43 to deform. Each steady-state elastic element 43 has a closed stable position, a neutral position and a closed stable position, and the steady-state elastic element 43 can be stationary in the closed stable position or the closed stable position, respectively.

[0100] Specifically, when the steady-state elastic element 43 is in the neutral position, its central axis is perpendicular to the first direction. In this embodiment, the central axis of the steady-state elastic element 43 is parallel to the second direction. When the steady-state elastic element 43 is in the closed or open stable position, its central axis forms an angle with the first direction. This can also be understood as the energy storage process occurring when switching from the closed or open stable position to the neutral position, driven by the moving contact assembly. The energy release process occurs when switching from the neutral position to the closed or open stable position, and the energy released by the steady-state elastic element 43 can be combined with... The moving contact assembly is driven to move, thereby further improving the opening and closing action of the contact mechanism. When the steady-state elastic element 43 moves to the closing position or the opening position, the steady-state elastic element 43 can provide a holding force for the moving contact assembly. Specifically, in the closed stable position, the steady-state elastic element 43 provides a closing holding force for the moving contact assembly in the closed position and has a component force that drives the moving contact assembly to move to the closed position. In the opening stable position, the steady-state elastic element 43 provides an opening holding force for the moving contact assembly in the opening position and has a component force that drives the moving contact assembly to move to the opening position. That is, the components of the closing holding force and the opening holding force are opposite in the first direction.

[0101] Combination Figure 21-23 Briefly describe the opening and closing process in this embodiment.

[0102] like Figure 21 As shown, when the contact mechanism closes, the closing magnet 421 and the closing yoke 411 are attracted, keeping the moving contact assembly and the stationary contact 21 in a closed state of mutual contact. At the same time, the steady-state elastic element 43 is in a stable closed position. Figure 21In the middle, the steady-state elastic element 43 is tilted upward, and the steady-state elastic element 43 applies pressure to the moving contact assembly. The component of this pressure in the first direction is an upward pressure, which is the closing holding force. It can further press the moving contact assembly, so that the moving contact assembly is stably maintained in the closed position under the dual action of the closing magnet 421, the closing yoke 411 and the steady-state elastic element 43. In addition, when the driving cavity 102 has a large enough space for movement in the first direction, the attraction between the closing magnet 421 and the closing yoke 411 can overcome the elastic force of the contact spring 242 in the compression spring assembly 24, so that the insulating seat 23 can move in the first direction toward the stationary contact 21, and the moving contact plate 2 20 can move further towards the stationary contact 21 relative to the insulating base 23 in the first direction, achieving a greater closing overtravel; when the opening coil 32 is energized, the repulsion disk 33 generates eddy currents, generating a opening repulsion force between the repulsion disk 33 and the opening coil 32. After overcoming the magnetic force between the closing magnet 421 and the closing yoke 411, and the closing holding force provided by the steady-state elastic element 43 stationary in the closing stable position for the moving contact assembly, the opening repulsion force drives the moving contact assembly to move away from the stationary contact 21 along the first direction. During this process, the moving contact assembly drives the steady-state elastic element 43 from the closing stable position to the neutral position (see...). Figure 22 Subsequently, the moving contact assembly is driven by the steady-state elastic element 43, the repulsive force of the tripping action, and the magnetic force between the tripping magnet 422 and the tripping yoke 412. Finally, the moving contact assembly is maintained in the tripped state by the attraction between the tripping magnet 422 and the tripping yoke 412, and by the steady-state elastic element 43 which is stationary in the tripped stable position (see...). Figure 23 The steady-state elastic element 43, which is stationary in the open stable position, can provide a closing holding force for the moving contact assembly in the open position, and the closing holding force is downward in the first direction.

[0103] like Figure 23 As shown, when the contact mechanism opens, the opening magnet 422 and the opening yoke 412 are attracted, and the steady-state elastic element 43 is in the stable opening position, keeping the moving contact assembly and the stationary contact 21 in a separated opening state. When the closing coil 31 is energized, the repulsion disk 33 generates eddy currents, generating a closing repulsion force between the repulsion disk 33 and the closing coil 31. The closing repulsion force overcomes the magnetic force between the opening magnet 422 and the opening yoke 412, and also overcomes the opening holding force of the steady-state elastic element 43 in the stable opening position. The closing repulsion force drives the moving contact assembly to move towards the stationary contact 21 along the first direction. During this process, the moving contact assembly drives the steady-state elastic element 43 from the stable opening position to the neutral position (see...). Figure 22Subsequently, the moving contact assembly is driven by the steady-state elastic element 43, the repulsive force of the tripping action, and the magnetic force between the tripping magnet 422 and the tripping yoke 412. Finally, the moving contact assembly is maintained in the closed state by the attraction between the closing magnet 421 and the closing yoke 411, and by the steady-state elastic element 43 which is stationary in the closed stable position (see...). Figure 21 ).

[0104] A specific embodiment of a fourth type of mechanical switch is provided. The mechanical switch includes a housing 1, and a contact mechanism, an electromagnetic drive assembly, and a steady-state holding assembly are provided inside the housing 1. The housing 1, contact mechanism, and electromagnetic drive assembly of this embodiment are the same as those in the first embodiment. The steady-state holding assembly of this embodiment is based on the first embodiment and further adds a steady-state elastic element 43. The steady-state elastic element 43 adopts the linear spring of the third embodiment. The difference from the third embodiment is that the steady-state elastic element 43 is connected between the moving contact plate 220 and the housing 1. Its operating principle is the same as that of the third embodiment.

[0105] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0106] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A mechanical switch, comprising a housing (1), wherein the housing (1) is provided with a contact mechanism, a tripping coil (32) and a closing coil (31), the contact mechanism comprising stationary contacts (21) spaced apart and a moving contact assembly, a repulsion disk (33) is provided between the tripping coil (32) and the closing coil (31), a closing repulsion force is generated between the closing coil (31) and the repulsion disk (33) after energization, and a tripping repulsion force is generated between the tripping coil (32) and the repulsion disk (33) after energization, the moving contact assembly is driven by the repulsion disk (33) to move linearly to switch between the closing and tripping positions. Its features are: The housing (1) is further provided with a steady-state holding assembly, which includes a closing magnet (421), a opening magnet (422), and a yoke (41). In a first direction, the closing magnet (421) and the stationary contact (21) are fixed on the same side wall of the housing (1). The yoke (41) is disposed on the moving contact assembly and is located between the opening magnet (422) and the closing magnet (421). When the moving contact assembly is in the closed position, the moving contact assembly is in contact with the stationary contact (21), and the closing magnet (421) and the yoke (41) are attracted to each other, maintaining the moving contact assembly in the closed position. When the moving contact assembly is in the open position, the moving contact assembly is separated from the stationary contact (21), and the opening magnet (422) and the yoke (41) are attracted to each other, maintaining the moving contact assembly in the open position.

2. The mechanical switch according to claim 1, characterized in that: The steady-state holding assembly further includes a steady-state elastic element (43), which is connected between the moving contact assembly and the housing (1). The moving contact assembly drives the steady-state elastic element (43) to move between a closed stable position, a neutral position, and a closed stable position. In a first direction, the neutral position is located between the closed stable position and the closed stable position. In the closed stable position, the steady-state elastic element (43) provides a closing holding force for the moving contact assembly in the closed position. In the open stable position, the steady-state elastic element (43) provides a opening holding force for the moving contact assembly in the open position. In the neutral position, the elastic force of the steady-state elastic element (43) is perpendicular to the first direction, and the components of the closing holding force and the opening holding force in the first direction are opposite.

3. The mechanical switch according to claim 1 or 2, characterized in that: The contact mechanism includes at least two stationary contacts (21), each of which has a stationary contact point (211). The moving contact assembly includes a moving contact plate (220), with moving contact points (221) corresponding to the stationary contact points (211) at both ends of the moving contact plate (220). The magnetic yoke (41) is located between the two moving contact points (221).

4. The mechanical switch according to claim 3, characterized in that: A guide structure is provided between the housing (1) and the moving contact assembly. The guide structure includes a guide post (52) and a guide hole (51) that cooperate with each other, and the guide structure provides sliding guidance for the movement of the moving contact assembly.

5. The mechanical switch according to claim 3, characterized in that: The tripping coil (32) and the stationary contact (21) are fixed on the same side of the housing (1). The closing coil (31) is located inside the housing (1) opposite to the stationary contact (21). The moving contact plate (220) is located between the closing coil (31) and the tripping coil (32). A repulsion disk (33) is formed by a portion of the moving contact plate (220). The magnetic yoke (41) is fixed on the moving contact plate (220).

6. The mechanical switch according to claim 5, characterized in that: The repulsion disk (33) is formed in the middle region of the moving contact plate (220), and the magnetic yoke (41) is symmetrically provided on both sides of the moving contact plate (220).

7. The mechanical switch according to claim 4, characterized in that: The housing (1) is provided with at least two guide posts (52), and the movable contact plate (220) is provided with guide holes (51) through which the guide posts (52) slide, and the guide holes (51) are symmetrically opened at both ends of the movable contact plate (220).

8. The mechanical switch according to claim 5, characterized in that: The moving contact assembly also includes an insulating base (23), and the moving contact plate (220), the repulsion disk (33) and the magnetic yoke (41) are respectively disposed on the insulating base (23).

9. The mechanical switch according to claim 8, characterized in that: The closing coil (31) and the opening coil (32) are located on the same side of the moving contact plate (220) opposite to the stationary contact (21). In the linear movement direction of the moving contact assembly, in the first direction, the stationary contact (21) and the closing magnet (421) are at the same height. The stationary contact (21), the closing magnet (421), the moving contact plate (220), the opening magnet (422), the opening coil (32), the repulsion disk (33), and the closing coil (31) are arranged in sequence.

10. The mechanical switch according to claim 9, characterized in that: The magnetic yoke (41) is fixed between the moving contact plate (220) and the insulating base (23). The magnetic yoke (41) includes two magnetic yoke plates stacked and fixed to the insulating base (23). One of the magnetic yoke plates closer to the moving contact plate (220) serves as the closing magnetic yoke (411), and the other of the magnetic yoke plate closer to the insulating base (23) serves as the opening magnetic yoke (412). The two ends of the closing magnetic yoke (411) extend from the two side edges of the moving contact plate (220) toward the closing magnet (421) to form a closing attraction part. The two ends of the opening magnetic yoke (412) extend toward the opening magnet (422) to form the opening attraction part.

11. The mechanical switch according to claim 8, characterized in that: The middle part of the moving contact plate (220) is elastically connected to the insulating seat (23) through a compression spring assembly (24). When the circuit is closed, the closing magnet (421) attracts the magnetic yoke (41) and drives the insulating seat (23). The compression spring assembly (24) undergoes elastic deformation under the relative movement between the insulating seat (23) and the moving contact plate (220).

12. The mechanical switch according to claim 11, characterized in that: The insulating base (23) includes a support plate (231), the support plate (231) has at least a pair of spaced-apart support sidewalls, the edge of the support sidewalls is provided with a buckle (233), the edge of the movable contact plate (220) is provided with a groove (222), the movable contact (22) is assembled on the support plate (231), and the buckle (233) and the groove (222) cooperate to limit the movement range of the movable contact plate (220).

13. The mechanical switch according to claim 11, characterized in that: The compression spring assembly (24) includes a connecting shaft (241) and a contact spring (242). One end of the connecting shaft (241) slides through the movable contact plate (220), allowing the movable contact plate (220) to slide between the two ends of the connecting shaft (241). The contact spring (242) is sleeved on the outside of the connecting shaft (241) and is located between the movable contact plate (220) and the insulating seat (23).

14. The mechanical switch according to claim 8, characterized in that: The insulating base (23) is provided with at least two guide posts (52) on the side opposite to the stationary contact (21), and the guide posts (52) slide through the guide holes (51) in the housing (1).

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