Switching device

Abstract

A switching device, comprising a housing, an electromagnetic operating system, and at least one contacting unit. The electromagnetic operating system comprises an electromagnetic driving mechanism and a linkage assembly; the electromagnetic driving mechanism moves in a first direction; each contacting unit comprises two connecting terminals spaced apart from each other in a second direction; a contact mechanism is provided between the two connecting terminals; the linkage assembly is linked between the electromagnetic driving mechanism and the contact mechanism; the first direction is perpendicular to the second direction; the electromagnetic operating system and the contacting unit are arranged in the first direction; the linkage assembly and the contact mechanism are arranged in the first direction; the electromagnetic driving mechanism and the linkage assembly are arranged side by side in the second direction; and the electromagnetic driving mechanism drives a moving contact assembly in at least one contact mechanism by means of the linkage assembly to move in the first direction. The present invention prevents the moving tracks of the electromagnetic driving mechanism and the linkage assembly from being collinear in the first direction, reducing the height of the switching device, avoiding occupying excess space, facilitating miniaturization design.

Description

switchgear

[0001] This application claims priority to Chinese patent application number 2024100436086 and filing date January 11, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present invention relates to the field of low-voltage electrical appliances, and in particular to a switch device. Background Art

[0003] A switch device is a device that controls the on and off of a circuit. The switch device includes an electromagnetic operating system and at least one contact unit. The electromagnetic operating system drives the contact mechanism of the contact unit to open and close.

[0004] In some products, the electromagnetic operating system is usually arranged side by side or in parallel with the contact unit, that is, the electromagnetic operating system is arranged side by side or in parallel with a contact unit in the same space, or is arranged side by side or in parallel with the contact unit as a separate accessory module. Such a structure will inevitably increase the overall thickness or width of the switching device. When the number of contact units is large, it is not conducive to ensuring the synchronization of the actions of multiple contact units.

[0005] In another part of the products, the electromagnetic operating system and the contact unit are arranged in the up and down direction. The electromagnetic operating system drives the moving contact assembly in the contact unit through the linkage assembly. Since the moving trajectories of the linkage assembly and the electromagnetic operating system are collinear, such a structure requires too much space in height of the switching device, thereby increasing the overall height of the switching device.

[0006] Summary of the Invention

[0007] The object of the present invention is to overcome at least one drawback of the prior art and to provide a switch device with a simple structure and high reliability.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention provides a switch device, comprising a housing, an electromagnetic operating system, and at least one contact unit. The electromagnetic operating system comprises an electromagnetic drive mechanism and a linkage assembly. The electromagnetic drive mechanism moves along a first direction. Each contact unit comprises two wiring terminals spaced apart along a second direction. A contact mechanism is provided between the two wiring terminals. The linkage assembly is linked between the electromagnetic drive mechanism and the contact mechanism of at least one contact unit. The first direction is perpendicular to the second direction.

[0010] The electromagnetic operating system and the contact unit are arranged along the first direction, the linkage assembly and the contact mechanism are arranged along the first direction, the electromagnetic drive mechanism and the linkage assembly are arranged side by side along the second direction, and the electromagnetic drive mechanism drives the moving contact assembly in at least one contact mechanism to move in the first direction through the linkage assembly.

[0011] Preferably, the electromagnetic operating system includes two electromagnetic drive mechanisms. In the second direction, the two electromagnetic drive mechanisms are spaced apart, and the linkage assembly is linked and connected between the two electromagnetic drive mechanisms.

[0012] Preferably, the electromagnetic operating system also includes at least one elastic reset member. In the second direction, the elastic reset member is arranged between the two electromagnetic drive mechanisms to cooperate with the linkage assembly to drive the electromagnetic drive mechanism to reset. In the third direction, two adjacent elastic reset members are arranged at intervals, and the third direction is perpendicular to the first direction and the second direction respectively.

[0013] Preferably, the contact unit further includes a unit shell, the contact mechanism is arranged in the unit shell, a first limiting groove is opened on the outside of the unit shell, and the bottom of the first limiting groove is recessed toward the inside of the unit shell for limiting the assembly of the electromagnetic drive mechanism.

[0014] Preferably, the contact mechanism includes a moving contact assembly and a static contact group that are spaced relative to each other in a first direction, and a linkage part is provided on the side of the moving contact assembly facing away from the static contact group. The linkage part extends from a linkage groove provided in the unit housing for driving cooperation with the linkage assembly, and two adjacent linkage parts are spaced apart in a third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0015] Preferably, the moving contact assembly includes a contact support, a moving contact bridge and an elastic device, the linkage part is arranged on the side of the contact support facing away from the moving contact bridge, the contact support is provided with an assembly cavity, the elastic device, the moving contact bridge and the connecting piece arranged on the moving contact bridge are arranged in the assembly cavity, and the first end and the second end of the elastic device are respectively connected to the connecting piece and the contact support.

[0016] Preferably, at least one limiting platform is provided in the unit housing, the limiting platform is spaced apart and opposite to the static contact group, and the moving contact bridge moves between the limiting platform and the static contacts.

[0017] Preferably, the static contact group includes two static contacts spaced apart in the second direction, each static contact is arranged along the side position inside the unit housing, the first end of the static contact is provided with a static contact portion, the static contact portion is spaced apart and opposite to a dynamic contact portion of the dynamic contact assembly in the first direction, and the second end of the static contact is connected to the adjacent terminal.

[0018] Preferably, the first end of the static contact is spaced opposite to the moving contact assembly, the first end is folded back and extended to form a static contact portion, the static contact portion is spaced opposite to a moving contact portion of the moving contact assembly, a magnetizing part is provided in the gap between the static contact portion and the first end, and the second end of the static contact is connected to the adjacent terminal.

[0019] Preferably, each contact unit further comprises a current detection device, wherein the current detection device is connected to the middle portion of the static contact, and a connection terminal of the current detection device extends to the outside of the unit housing.

[0020] Preferably, the current detection device is also connected to a connecting circuit board, which is fitted on the outer surface of the unit shell; the outer surface of the unit shell is provided with a mounting groove for installing the connecting circuit board, one end of the mounting groove is connected to the wiring terminal, and the other end is connected to the first limiting groove for limiting the electromagnetic drive mechanism, and the groove depth of the mounting groove is greater than or equal to the thickness of the connecting circuit board.

[0021] Preferably, the linkage assembly at least includes a linkage rod, both ends of the linkage rod are respectively connected to two electromagnetic drive mechanisms, and the moving contact assembly is driven by the middle of the linkage rod.

[0022] Preferably, the linkage assembly further includes a linkage member, the linkage member is provided with at least one first linkage hole, the linkage rod passes through the first linkage hole along the second direction, the linkage member is provided with at least one second linkage hole, and the second linkage hole is used for linkage connection with the moving contact assembly.

[0023] Preferably, an operation key is provided outside the shell, and a control system is also provided inside the shell. The operation key and the electromagnetic operating system are respectively connected to the control system, and pressing the operation key triggers the control system to drive the electromagnetic operating system to operate; an arc extinguishing system is provided between the contact mechanism and the adjacent terminal, and the electromagnetic drive mechanism and the adjacent arc extinguishing system are arranged along the first direction.

[0024] Preferably, it comprises two or more contact units arranged side by side in a third direction, the movable contact assemblies of two adjacent contact units are linked and connected, and the third direction is perpendicular to the first direction and the second direction respectively.

[0025] In the switch device of the present invention, the electromagnetic operating system and the contact unit are arranged along the first direction as a whole, so as to avoid increasing the thickness or width of the switch device as a whole. The linkage component and the electromagnetic drive mechanism are arranged side by side in the second direction, so as to avoid the moving trajectories of the electromagnetic drive mechanism and the linkage component being collinear in the first direction, which is conducive to reducing the height of the switch device, avoiding occupying too much space, and meeting the miniaturization design of the switch device.

[0026] In addition, the electromagnetic operating system includes two electromagnetic drive mechanisms, which jointly drive the contact mechanism, providing a stable driving force for the opening and closing of the contact mechanism, and improving the stability of the electromagnetic operating system in driving multiple contact mechanisms.

[0027] In addition, the elastic reset member is arranged side by side with the electromagnetic drive mechanism, which can reset the electromagnetic drive mechanism and the linkage assembly at the same time, making full use of the space inside the shell.

[0028] In addition, the first limiting groove of the unit shell can limit the assembly of the electromagnetic drive mechanism. The first limiting groove is recessed into the interior of the unit shell to fully utilize the space inside the shell, which is conducive to reducing the height of the switch device in the first direction.

[0029] In addition, the static contact is arranged along the gap between the arc extinguishing chamber and the unit housing, making the internal structure of the contact unit more compact and reasonable.

[0030] In addition, a magnetizing portion is provided in the gap between the static contact portion and the first end of the static contact, which can increase the magnetic field at the static contact portion and the dynamic contact portion, thereby facilitating arc striking. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic structural diagram of a switch device according to the present invention;

[0032] FIG2 is a schematic structural diagram of the switch device of the present invention after the housing is removed;

[0033] FIG3 is a schematic diagram of the electromagnetic drive mechanism and linkage assembly of the present invention;

[0034] FIG4 is a schematic structural diagram of the electromagnetic operating system and the contact unit in the present invention;

[0035] FIG5 is a schematic structural diagram of the electromagnetic operating system and the contact unit after decomposition in the present invention;

[0036] FIG6 is a schematic diagram of the internal structure of the contact unit of the present invention;

[0037] FIG7 is a front view of the internal structure of the contact unit of the present invention;

[0038] FIG8 is a cross-sectional view of a contact unit in the present invention;

[0039] FIG9 is a schematic structural diagram of the contact mechanism of the present invention;

[0040] FIG10 is a schematic structural diagram of the movable contact assembly of the present invention;

[0041] FIG11 is a schematic structural diagram of the elastic device in the present invention at a first equilibrium position;

[0042] FIG12 is a schematic structural diagram of the elastic device in the present invention at a second equilibrium position;

[0043] FIG13 is a cross-sectional view of a contact support in the present invention;

[0044] FIG14 is a schematic structural diagram of the movable contact bridge, the connector and the spring device of the present invention;

[0045] FIG15 is a schematic structural diagram of the switch device of the present invention (containing only one electromagnetic drive mechanism);

[0046] FIG16 is a schematic diagram of the linkage member and the contact unit in FIG15;

[0047] Reference numerals:

[0048] 1-housing, 1u-upper cover, 1b-base, b-operation key, b1-closing key, b2-opening key, t-terminal, 2-contact unit, 2h-unit housing, 20h-linkage slot, 21h-arc extinguishing channel, 22h-first limit slot, 23h-limiting platform, 2p-mounting slot, 2g-yoke mounting slot, 2e-unit exhaust port, 2l-second limit slot, 20-contact mechanism, 21-moving contact assembly, 200-contact support, 200b-linkage part, 20 10b-connecting hole, 200c-bearing part, 2001c-bearing part top wall, 2002c-bearing part bottom wall, 2003c-bearing part front wall, 2004c-bearing part rear wall, 200d-longitudinal cavity, 200e-transverse cavity, 2001e-connecting area, 2002e-stop wall, 201-moving contact bridge, 2011-moving contact part, 2012-moving contact point, 2013-limiting part, 202-elastic device, 2021-spring, 2022-first connecting plate , 2023-second connecting plate, 2024-guide rod, o1-hinge point of the first connecting plate, o2-hinge point of the second connecting plate, 203-connecting piece, 22-static contact group, 220-static contact, 2200-static contact plate, 22001-first plate, 22002-second plate, 22003-connecting section, 22004-static contact part, 22005-connecting part, 2201-static contact, 23-magnetizing part, 24-arc extinguishing chamber, 25-metal partition, 26-isolation Arc plate, 27-arc striking plate, 28-current detection device, 29-connecting circuit board, 3-electromagnetic operating system, 3m-electromagnetic drive mechanism, 3A-linkage assembly, 31-moving iron core, 32-coil assembly, 33-static iron core, 3c-transmission rod, 3b-linkage part, 30b-linkage part body, 300b-first linkage hole, 31b-avoidance groove, 32b-linkage bridge arm, 320b-second linkage hole, 33b-third limiting groove, 3r-linkage rod, 7-elastic reset part. DETAILED DESCRIPTION

[0049] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the switch device of the present invention. The switch device of the present invention is not limited to the description of the following embodiments.

[0050] As shown in Figures 1, 2 and 6-9, the switch device includes a housing 1, and an operation key b is provided on one side of the housing 1 as an operating end. A control system (not shown), an electromagnetic operating system 3 and at least one contact unit 2 are provided in the housing 1. The operation key b and the electromagnetic operating system 3 are respectively connected to the control system. The control system is triggered by pressing the operation key b, so that the electromagnetic operating system 3 operates according to the control signal of the control system. Of course, the operation key b is not provided, and the electromagnetic operating system 3 is directly driven by the control signal output by the control system. The electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage component 3A. Each contact unit 2 includes at least a pair of wiring terminals t and a contact mechanism 20 connected between the pair of wiring terminals t. The contact mechanism 20 includes a moving contact assembly 21 and a static contact group 22 that cooperate with each other. Two adjacent moving contact assemblies 21 are linked and connected. The electromagnetic drive mechanism 3m is driven and connected to at least one moving contact assembly 21 through the linkage component 3A.

[0051] Furthermore, as shown in Figures 6-9, each contact unit 2 also includes two arc extinguishing systems, each arc extinguishing system is arranged between a terminal t and the contact mechanism 20, and the arc extinguishing system cooperates to extinguish the arc generated by the disconnection of the contact mechanism 20, and an outlet for exhausting exhaust gas is opened on the housing 1.

[0052] For the convenience of description, the moving direction of the electromagnetic drive mechanism 3m is taken as the first direction. In Figure 2, the direction of the Y-axis is taken as the first direction, the moving contact assembly 21 and the static contact group 22 are spaced apart and opposite to each other in the first direction, and the two directions perpendicular to the first direction are respectively the second direction and the third direction. In Figure 2, the direction of the X-axis is taken as the second direction, and the direction of the Z-axis is taken as the third direction. A pair of wiring terminals t are spaced apart in the second direction, and the contact mechanism 20 is located between the pair of wiring terminals t. When multiple contact units 2 are provided in the housing 1, two adjacent contact units 2 are provided side by side in the third direction.

[0053] The improvement of the present application is that, as shown in Figures 1-3, the electromagnetic operating system 3 and the contact unit 2 are arranged along the first direction, the linkage component 3A and the contact mechanism 20 are arranged along the first direction, and the electromagnetic drive mechanism 3m and the linkage component 3A are arranged side by side along the second direction, and the electromagnetic drive mechanism 3m drives the moving contact component 21 in at least one contact mechanism 20 to move in the first direction through the linkage component 3A.

[0054] In this way, the electromagnetic operating system 3 as a whole is arranged along the first direction with the contact unit 2 to avoid increasing the overall thickness or width of the switching device, wherein the linkage component 3A and the electromagnetic drive mechanism 3m are arranged side by side in the second direction to avoid the moving trajectories of the electromagnetic drive mechanism 3m and the linkage component 3A being collinear in the first direction, which is beneficial to reducing the height of the switching device, avoiding occupying too much space, and meeting the miniaturization design of the switching device.

[0055] Furthermore, as shown in Figures 2 and 3, the electromagnetic operating system 3 includes two electromagnetic drive mechanisms 3m. In the second direction, the two electromagnetic drive mechanisms 3m are arranged at intervals, and the linkage component 3A is located between the two electromagnetic drive mechanisms 3m. The two electromagnetic drive mechanisms 3m and the moving contact assembly 21 are connected together by the linkage component 3A. The two electromagnetic drive mechanisms 3m jointly drive the contact mechanism 20 to open and close, which can provide a stable driving force. When the number of contact units 2 is multiple, the stability of the electromagnetic operating system 3 driving multiple contact mechanisms 20 can be improved.

[0056] Furthermore, as shown in Figures 4 and 5, the electromagnetic operating system 3 also includes at least one elastic reset member 7. In the second direction, the elastic reset member 7 is arranged between the two electromagnetic drive mechanisms 3m. In the third direction, two adjacent elastic reset members 7 are arranged at intervals. Preferably, an elastic reset member 7 is arranged between two adjacent contact units 2. The two contact units 2 share one elastic reset member 7, which can simplify the structure and reduce costs.

[0057] 1-14 , a first embodiment of a switch device is provided.

[0058] As shown in Figures 1-5, the switch device includes a housing 1. The opposite ends of the housing 1 serve as wiring terminals, each of which is provided with at least one wiring slot. Each wiring slot has an operating hole and a wiring hole corresponding thereto to facilitate wiring operation. The connecting line between the two wiring terminals is parallel to the second direction. The side of the housing 1 located between the two wiring terminals serves as the operating terminal. The operating terminal is provided with an operating key b. The pressing direction of the operating key b is parallel to the first direction. In Figure 1, the operating terminal protrudes from the middle of the housing 1, making the housing 1 as a whole present a convex shape. Preferably, the housing 1 includes an upper cover 1u and a base 1b that cover each other. The upper cover 1u covers the base 1b in the first direction. The operating terminal corresponds to the middle position of the upper cover 1u. The operating key b is a push button and can be divided into a closing key b1 and an opening key b2. In Figure 1, the closing key b1 and the opening key b2 are spaced apart in the third direction. Of course, the switch device can also be provided without an operating key b. The electromagnetic operating system 3 can also be remotely driven directly by the control system.

[0059] A control system, an electromagnetic operating system 3 and at least one contact unit 2 are arranged in the shell 1, wherein the control system includes a control circuit board, and the operation key b and the electromagnetic operating system 3 are respectively connected to the control circuit board. By pressing the operation key b, the controller arranged on the control circuit board can be triggered to output a control signal, so that the electromagnetic operating system 3 moves in the first direction according to the control signal output by the controller; the electromagnetic operating system 3 and the contact unit 2 are arranged along the first direction. In this embodiment, as shown in Figure 2-5, the number of contact units 2 is multiple, and two adjacent contact units 2 are arranged side by side in the third direction. The electromagnetic operating system 3 is linked to the contact mechanism 20 of at least one of the contact units 2. Correspondingly, the opening and closing direction of the contact mechanism 20 of each contact unit 2 is also along the first direction.

[0060] As shown in Figure 2-8, the electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage component 3A. Each contact unit 2 includes a pair of wiring terminals t spaced apart along the second direction. A contact mechanism 20 is connected between the pair of wiring terminals t. The contact mechanism 20 includes a moving contact assembly 21 and a static contact group 22 spaced apart and opposite to each other in the first direction. The electromagnetic drive mechanism 3m is linked to the moving contact assembly 21 of at least one contact unit 2 through the linkage component 3A. The moving contact assemblies 21 of two adjacent contact units 2 are linked, that is, a transmission rod 3c is connected between two adjacent moving contact assemblies 21. The electromagnetic operating system 3 can be driven and connected to one of the moving contact assemblies 21 through the linkage component 3A, and the remaining moving contact assemblies 21 move synchronously under the linkage action of the transmission rod 3c. Preferably, the linkage component 3A is linked to the transmission rod 3c, so that all moving contact assemblies 21 are synchronously driven by the electromagnetic operating system 3 to ensure consistency of movement.

[0061] In combination with Figures 2-5, a specific structure of an electromagnetic operating system 3 is provided. The electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage assembly 3A. The operation key b, the linkage assembly 3A and the moving contact assembly 21 are arranged in sequence along the first direction. The electromagnetic drive mechanism 3m moves along the first direction and is arranged side by side with the linkage assembly 3A in the second direction. The electromagnetic drive mechanism 3m is connected to the moving contact assembly 21 of at least one contact unit 2 through the linkage assembly 3A. In this embodiment, the electromagnetic drive mechanism 3m synchronously drives all the moving contact assemblies 21 to move along the first direction through the linkage assembly 3A. In Figures 2 and 3, the electromagnetic drive mechanism 3m corresponds to between the contact mechanism 20 and a terminal t, so that the electromagnetic drive mechanism 3m moves in a straight line in the area corresponding to the top of the arc extinguishing system. That is, in the first direction, the moving trajectory of the electromagnetic drive mechanism 3m and the moving trajectory of the linkage assembly 3A are not on the same straight line, which is conducive to reducing its height.

[0062] Furthermore, as shown in Figures 4 and 5, the electromagnetic operating system 3 also includes an elastic reset member 7, which cooperates with the linkage assembly 3A to reset the electromagnetic drive mechanism 3m and the linkage assembly 3A. Preferably, in the second direction, the elastic reset member 7 is arranged between the two electromagnetic drive mechanisms 3m, and in the third direction, the elastic reset member 7 is arranged on the unit housing 2h between the two contact units 2. Two adjacent contact units 2 share one elastic reset member 7, which is conducive to reducing costs.

[0063] In this embodiment, as shown in Figure 2, the electromagnetic drive mechanism 3m includes a magnetic yoke, a coil assembly 32 and a moving assembly, wherein the magnetic yoke is arranged around the outside of the coil assembly 32, the coil assembly 32 includes a coil frame and a coil wound around the outside of the coil frame, and the moving assembly includes a moving iron core 31 and a static iron core 33, wherein the static iron core 33 and the moving iron core 31 are respectively arranged at opposite ends of the coil frame, each coil frame is arranged in the housing 1 along a first direction, and the coil assembly 32 drives the moving iron core 31 to move along the first direction according to a control signal, the two coil frames are arranged at intervals in the second direction, and the two moving iron cores 31 are arranged at intervals in the second direction and are linked and connected through the linkage assembly 3A. Of course, the electromagnetic drive mechanism 3m can also adopt existing technology.

[0064] As shown in Figure 3-5, the linkage assembly 3A includes a linkage rod 3r and a linkage member 3b. The two ends of each linkage rod 3r are respectively connected to the two moving iron cores 31, that is, the central axis of each linkage rod 3r is parallel to the second direction. The linkage member 3b is arranged in the middle of the linkage rod 3r and is linked to the contact mechanism 20 of at least one contact unit 2. When the number of contact units 2 is large or the length of the moving iron core 31 in the third direction is large, the number of linkage rods 3r is two or more, and two adjacent linkage rods 3r are arranged side by side in the third direction, which is conducive to ensuring the stable linkage of the two electromagnetic drive mechanisms 3m. In the third direction, the preferred linkage member 3b is driven and connected to the contact mechanism 20 of one or two contact units 2 located in the middle position, which is conducive to ensuring the synchronization of the opening and closing actions of all contact mechanisms 20.

[0065] As shown in Figures 2-5, the linkage 3b includes a block-shaped linkage body 30b, and an open groove serving as an avoidance groove 31b is opened in the middle of one side of the linkage body 30b. The opening of the avoidance groove 31b is opposite to the contact mechanism 20 of the contact unit 2, which is conducive to reducing the space occupied by the linkage 3b in the first direction (height direction). A first linkage hole 300b for the linkage 3b to pass through is opened on the other side of the linkage body 30b. In Figure 5, the avoidance groove 31b and the first linkage hole 300b are arranged along the center line of the linkage 3b, so that the linkage 3b has a symmetrical structure.

[0066] Of course, the linkage assembly 3A may also only include a linkage rod 3r, the two ends of the linkage rod 3r are respectively linked to the two electromagnetic drive mechanisms 3m, the middle part of the linkage rod 3r is connected to at least one moving contact assembly 21, or the middle part of the linkage rod 3r is connected to the transmission rod 3c connected between the two moving contact assemblies 21, which can also drive all contact mechanisms 20.

[0067] At least one second linkage hole 320b is provided at both ends of the linkage member 3b, and the central axis of the second linkage hole 320b passes through both sides of the opening of the avoidance groove 31b, that is, the central axis of the second linkage hole 320b is perpendicular to the central axis of the first linkage hole 300b. In this embodiment, the central axis of the first linkage hole 300b is parallel to the first direction, and the central axis of the second linkage hole 320b is parallel to the third direction. The linkage member 3b is linked to the contact mechanism 20 through the second linkage hole 320b. When multiple contact mechanisms 20 are linked, the transmission rod 3c linked between two adjacent contact mechanisms 20 can pass through the second linkage hole 320b. As a result, the linkage member 3b drives the contact mechanism 20. In Figure 2-5, the two ends of the linkage member 3b protrude and extend outward along the opening direction away from the avoidance groove 31b, so that the two side ends of the opening of the avoidance groove 31b form a linkage bridge arm 32b, and each second linkage hole 320b is correspondingly opened on the linkage bridge arm 32b. The linkage bridge arm 32b is provided with a third limiting groove 33b on the side facing the contact unit 2, and one end of the elastic return member 7 is elastically abutted against the third limiting groove 33b. In the figure, the elastic return member 7 is a spring 2021 with one end arranged along the first direction, one end of the spring 2021 cooperates with the third limiting groove 33b, and the other end cooperates with the contact unit 2 for limiting.

[0068] As another structure of the electromagnetic operating system 3, the electromagnetic operating system 3 may also include only one electromagnetic drive mechanism 3m. The electromagnetic drive mechanism 3m and the linkage assembly 3A are still arranged side by side in the second direction. At this time, the linkage assembly 3A can adopt the above structure or be simplified to include only the linkage rod 3r. However, compared with the structure with two electromagnetic drive mechanisms 3m, the driving force on the contact mechanism 20 is smaller, and it is suitable for switching devices with fewer contact units 2.

[0069] A specific structure of a contact unit 2 is provided in conjunction with Figures 5-14.

[0070] The contact unit 2 includes a pair of terminals t, a contact mechanism 20 and two arc extinguishing systems, wherein the pair of terminals t are spaced apart in the second direction, the contact mechanism 20 is connected between the pair of terminals t for controlling the connection and disconnection of the main line of each contact unit 2, and each arc extinguishing system is arranged between the contact mechanism 20 and a terminal t. Each arc extinguishing system includes an arc extinguishing chamber 24, the arc entrance of the arc extinguishing chamber 24 is connected to the contact mechanism 20, and an exhaust hole for discharging exhaust gas is provided at one end of the arc extinguishing chamber 24 away from the arc entrance, wherein the terminal t and the arc extinguishing chamber 24 can adopt existing technology.

[0071] As shown in Figures 6-10, the contact mechanism 20 includes a moving contact assembly 21 and a static contact group 22 that are spaced opposite to each other in a first direction. The static contact group 22 includes two static contacts 220. In the second direction, the two static contacts 220 are spaced apart between two wiring terminals t. The first end of each static contact 220 is provided with a static contact portion 22004. The middle part of the static contact 220 extends along a side adjacent to the arc extinguishing chamber 24, so that the second end of the static contact 220 is connected to a wiring terminal t. The moving contact assembly 21 includes a contact support 200 and a moving contact bridge 201 connected to the contact support 200. A protruding linkage portion 200b is provided on the side of the contact support 200 facing away from the moving contact bridge 201. The two adjacent linkage portions 200b are linked and connected by a transmission rod 3c. The two ends of the moving contact bridge 201 serve as moving contact portions 2011 respectively. Each moving contact portion 2011 contacts or separates from a corresponding static contact portion 22004 at the arc entrance of the arc extinguishing chamber 24.

[0072] Preferably, as shown in Figures 8 and 11-14, the moving contact assembly 21 also includes two elastic devices 202, and a connecting piece 203 is provided in the middle of the moving contact bridge 201. The connecting piece 203 and the moving contact bridge 201 are fixed together by riveting or welding. The first end and the second end of each elastic device 202 are respectively linked to the contact support 200 and the connecting piece 203, so that the two elastic devices 202 cooperate to switch between the first equilibrium position, the dead point position and the second equilibrium position. The dead point position is between the first equilibrium position and the second equilibrium position. Preferably, the two elastic devices 202 are symmetrically arranged, thereby ensuring that the moving contact bridge 201 is evenly stressed and avoiding the displacement of the moving trajectory of the moving contact bridge 201.

[0073] Furthermore, the second ends of the two elastic devices 202 are elastically squeezed against each other, that is, in the first equilibrium position, the dead point position and the second equilibrium position, the second ends of the two elastic devices 202 remain in contact, and the elastic deformation of each elastic device 202 in the first equilibrium position and the second equilibrium position is less than the elastic deformation at the dead point position. Of course, the second ends of the two elastic devices 202 may also not cooperate with each other. Each elastic device 202 undergoes elastic deformation under the interaction between the connector 203 and the contact support 200. At this time, it is difficult for the two elastic devices 202 to maintain a stable state at the dead point position. At this time, as the moving contact bridge 201 is repelled, the two elastic devices 202 switch across the dead point position and remain in the second equilibrium position.

[0074] As shown in Figures 8 and 11, during normal opening and closing, the two elastic devices 202 remain in a first equilibrium position at an included angle, and each elastic device 202 can apply pressure to the moving contact bridge 201. In the closed state, the pressure applied by each elastic device 202 can serve as the contact pressure between the moving contact portion 2011 and the static contact portion 22004. When a short circuit fault occurs, the electric force generated between the moving contact portion 2011 and the static contact portion 22004 repels the moving contact bridge 201, and the moving contact bridge 201 moves in a first direction away from the static contact 220. The movement of the moving contact bridge 201 can drive the second ends of the two elastic devices 202 to move relative to the contact support 200, so that the two elastic devices 202 switch and remain in a dead point position or a second equilibrium position at an included angle (see Figure 12). At this time, the two elastic devices 202 can limit the moving contact bridge 201 from moving in a direction close to the static contact 220, avoiding contact with the static contact group 22 again due to the reduction of the electric force, thereby causing welding between the contacts.

[0075] Preferably, as shown in Figures 10-13, one end of the contact support 200 serves as a linkage portion 200b, and at least one connecting hole 2010b is provided on the linkage portion 200b. A transmission rod 3c passes through each connecting hole 2010b to connect two adjacent linkage portions 200b together. The other end of the contact support 200 is provided with an assembly cavity, and the moving contact bridge 201 is arranged through the assembly cavity, and the two moving contact portions 2011 extend out of the assembly cavity respectively. The first end of each elastic device 202 is rotatably connected to the assembly cavity, and the assembly cavity has a certain space in a direction perpendicular to the moving contact bridge 201. When the moving contact bridge 201 is repelled by the electric force, the moving contact bridge 201 can move in the assembly cavity along a direction perpendicular to the plane P (see Figure 14) connected between the two ends of the moving contact bridge 201. In this embodiment, the moving contact bridge 201 moves in the assembly cavity along a first direction; further, one end of the assembly cavity extends in a direction away from the moving contact bridge 201 to provide a moving space for the connector 203. When the moving contact bridge 201 moves relative to the contact support 200, the connector 203 moves in the assembly cavity. The side wall of the assembly cavity at the first end of each elastic device 202 is rotatably connected, so that the elastic device 202 and the connector 203 are in the internal space of the contact support 200, avoiding interference from external structures, thereby ensuring the matching stability.

[0076] In conjunction with Figures 6-14, a specific structure of a moving contact assembly 21 is provided. The moving contact assembly 21 includes a contact support 200, a connector 203, a moving contact bridge 201 and two elastic devices 202. The contact support 200 includes an integrally formed linkage portion 200b and a bearing portion 200c. One end of the linkage portion 200b is provided with two side-by-side connection holes 2010b. The other end of the linkage portion 200b is connected to one end of the bearing portion 200c. Preferably, the bearing portion 200c is a T-shaped hollow body. After the linkage portion 200b is connected to the bearing portion 200c, the contact support 200 is cross-shaped as a whole, wherein the top wall 200 of the bearing portion is 01c are respectively connected to both sides of the other end of the linkage part 200b, and the end wall of the load-bearing part 200c away from one end of the linkage part 200b serves as the bottom wall 2002c of the load-bearing part, and two pairs of side walls are connected between the bottom wall 2002c of the load-bearing part and the top wall 2001c of the load-bearing part, one pair of side walls are respectively the front wall 2003c of the load-bearing part and the rear wall 2004c of the load-bearing part, and the other pair of side walls are respectively the left wall of the load-bearing part and the right wall of the load-bearing part. The internal hollow area of ​​the load-bearing part 200c serves as an assembly cavity, and the left wall and the right wall of the load-bearing part are opened as an installation port connected to the assembly cavity, and the two ends of the moving contact bridge 201 extend from the installation port to the outside of the contact support 200 respectively.

[0077] In Figures 9-13, the assembly cavity is T-shaped as a whole, and the assembly cavity includes a transverse cavity 200e and a longitudinal cavity 200d that are interconnected. The central axis of the longitudinal cavity 200d is parallel to the first direction, and the central axis of the transverse cavity 200e is parallel to the second direction. The two ends of the transverse cavity 200e away from the longitudinal cavity 200d serve as connection areas 2001e respectively, and the connecting member 203 moves along the central axis of the longitudinal cavity 200d. The first end of each elastic device 202 is rotatably connected to the end of the transverse cavity 200e away from the longitudinal cavity 200d, that is, it is connected to the connection area 2001e. The inner wall of the transverse cavity 200e facing the dynamic contact bridge 201 serves as a stop wall 2002e. When the connecting member 203 contacts the stop wall 2002e, the stop wall 2002e prevents the connecting member 203 from continuing to move, so that the two elastic devices 202 switch to the second equilibrium state.

[0078] As shown in Figures 6-12 and 14, the moving contact bridge 201 is in the shape of a straight plate as a whole. The middle part of the moving contact bridge 201 is arranged in the assembly cavity. The two ends of the moving contact bridge 201 serve as moving contact parts 2011 and extend out of the assembly cavity from two installation ports. In this embodiment, the plane P connected between the two ends of the moving contact bridge 201 can also be understood as a plane area connected between the two moving contact parts 2011. When the moving contact bridge 201 is set on the contact support 200, the plane P is perpendicular to the first direction. A moving contact point 2012 is provided on the side of each moving contact part 2011 facing the static contact 220, and the end of each moving contact part 2011 faces away from the static contact. The head 220 is bent in the direction to form a limit portion 2013. When the moving contact assembly 21 is in the opening position, the limit portion 2013 can cooperate with the limit platform 23h in the switch device, thereby limiting the movement range of the moving contact bridge 201. In addition, when the moving contact bridge 201 is pushed open, the limit portion 2013 cooperates with the limit platform 23h. When the driving contact support 200 is moved to the opening position, the limit portion 2013 abuts against the limit platform 23h, thereby limiting the connecting member 203 and the second end of the elastic device 202, so that the contact support 200 drives the first end of the elastic device 202 to move, thereby switching the elastic device 202 to the first equilibrium position.

[0079] The connecting member 203 is arranged in the middle of the moving contact bridge 201. In Figure 14, the connecting member 203 is a U-shaped structure as a whole. The connecting member 203 includes two spaced-apart supporting walls, and two side-by-side shafts are arranged between the two supporting walls. The connecting line between the two shafts is parallel to the plane P connected between the two ends of the moving contact bridge 201. Each shaft is used to be rotatably connected to the second end of an elastic device 202. The part connected between the two supporting walls can be riveted or welded to the moving contact bridge 201.

[0080] As shown in Figures 8, 11, 12 and 14, each elastic device 202 includes a first connecting plate 2022, a second connecting plate 2023, a guide rod 2024 and a spring 2021. The first connecting plate 2022 and the second connecting plate 2023 are rotatably connected to the contact support 200 and the connecting member 203 respectively, and the two second connecting plates 2023 abut against each other. One end of the guide rod 2024 is connected to the first connecting plate 2022, and the other end of the guide rod 2024 is slidably fitted with the second connecting plate 2023. The spring 2021 is sleeved on the outer wall of the guide rod 2024 and abuts between the first connecting plate 2022 and the second connecting plate 2023 respectively. The axial length of the spring 2021 in the normal state is greater than the axial length of the guide rod 2024, so that the spring 2021 is always in a compressed state between the first connecting plate 2022 and the second connecting plate 2023.

[0081] In this embodiment, as shown in Figure 14, the first connecting plate 2022 is a U-shaped structure, the first connecting plate 2022 includes two first connecting arms set at intervals, a first middle plate is connected between the two first connecting arms, the two first connecting arms are rotatably connected in the assembly cavity through an axis rod, that is, connected to the end of the transverse cavity 200e away from the longitudinal cavity 200d, and one end of the guide rod 2024 is connected to the first middle plate; the second connecting plate 2023 is also a U-shaped structure, the second connecting plate 2023 includes two second connecting arms set at intervals, the two second connecting arms are respectively rotatably connected to an axis rod of the connecting member 203, a second middle plate is connected between the two second connecting arms, the other end of the guide rod 2024 slides through the middle of the second middle plate, and the end of the guide rod 2024 is provided with an anti-slip portion to prevent the guide rod 2024 from falling off the second middle plate.

[0082] As shown in Figures 8 and 11, when the elastic device 202 is in the first equilibrium state, the central axis of the spring 2021 forms an angle with the plane P connected between the two ends of the moving contact bridge 201, so that the distance from the second end of the elastic device 202 to the moving contact bridge 201 is smaller than the distance from the first end of the elastic device 202 to the moving contact bridge 201. At this time, the two elastic devices 202 cooperate to form shaped angle structure, the line between the hinge point o1 of the first connecting plate 2022 and the hinge point o2 of the second connecting plate 2023 is at an angle to the plane P connected between the two ends of the moving contact bridge 201, the spring 2021 is in a first compression state, and the elastic deformation direction of the spring 2021 is at an angle to the plane P connected between the two ends of the moving contact bridge 201, so that the elastic device 202 can apply pressure to the moving contact bridge 201, and the pressure direction is the direction close to the static contact 220, which is the direction indicated by the arrow in Figure 11.

[0083] When a short circuit fault occurs, the moving contact bridge 201 is repelled by the electric force and moves relative to the contact support 200 in the direction away from the static contact 220, that is, in the direction indicated by the arrow in Figure 12. The second end of each elastic device 202 also moves accordingly. When it moves to the dead point position, the line between the hinge point o1 of the first connecting plate 2022 and the hinge point o2 of the second connecting plate 2023 is parallel to the plane P connected between the two ends of the moving contact bridge 201. At the dead point position, the spring 2021 is in the second compressed state. At this time, the two elastic devices 202 cooperate as a whole to form a "--" structure. The two elastic devices 2 After crossing the dead point, 02 continues to move toward the second equilibrium position and finally remains at the second equilibrium position. When the side of the connecting member 203 away from the moving contact bridge 201 contacts the stop wall 2002e, the moving contact bridge 201 stops moving. At this time, the distance from the second end of each elastic device 202 to the moving contact bridge 201 is greater than the distance from the first end of the elastic device 202 to the moving contact bridge 201. The line between the hinge point o1 of the first connecting plate 2022 and the hinge point o2 of the second connecting plate 2023 again forms an angle with the plane P connected between the two ends of the moving contact bridge 201. At the second equilibrium position, the two elastic devices 202 cooperate to form shaped angle structure, but under the action of the stop wall 2002e, the angle formed by the connecting line between the hinge point o1 and the hinge point o2 and the plane P connecting the two ends of the moving contact bridge 201 may be smaller, and each spring 2021 is in the third compression state. Compared with the first equilibrium position, the distance between the first connecting plate 2022 and the second connecting plate 2023 is reduced, and one end of the guide rod 2024 slides with the middle part of the second intermediate plate. The spring 2021 is further compressed by the first connecting plate 2022 and the second connecting plate 2023. At this time, the elastic force exerted by the two springs 2021 is relatively large. After the electric force decreases or disappears, the elastic device 202 maintained in the second equilibrium position can limit the moving contact bridge 201 from moving in the direction close to the static contact 220, thereby preventing the moving contact bridge 201 and the static contact 220 from being connected again.

[0084] It should be noted that the stop wall 2002e may not be provided in the assembly cavity, and the elastic device 202 switched to the second equilibrium position may limit the further movement of the movable contact bridge 201.

[0085] As shown in Figures 6-9, the first end of the static contact 220 is spaced apart from the moving contact assembly 21, and the distal end of the first end is folded back and extended to form a static contact portion 22004. The static contact portion 22004 is spaced apart from the moving contact assembly 21, and a static contact point 2201 is provided on the side of the static contact portion 22004 facing the moving contact assembly 21. A gap is left between the static contact portion 22004 facing away from the static contact point 2201 and the first end of the static contact 220. The middle portion of the static contact 220 extends along one side of the arc extinguishing chamber 24, so that the second end of the static contact 220 is connected to a terminal t.

[0086] In this embodiment, the static contact 220 includes a static contact plate 2200, and the static contact plate 2200 includes a first plate 22001 and a second plate 22002 that are parallel to each other and extend in opposite directions. In FIG8, the first plate 22001 and the second plate 22002 extend in the second direction away from and close to the terminal t, respectively, wherein the first plate 22001 and the second plate 22002 serve as the first end and the second end of the static contact 220, respectively, and there is a connecting connection between the first plate 22001 and the second plate 22002. In section 22003, the end of the first plate 22001 extends and folds back to form a static contact portion 22004 spaced apart from the first plate 22001, with a gap left between the static contact portion 22004 and the first plate 22001. A static contact point 2201 is provided on the side of the static contact portion 22004 facing the dynamic contact portion 2011. The static contact point 2201 cooperates with the dynamic contact point 2012 of the dynamic contact portion 2011, and the end of the static contact portion 22004 is deflected toward the direction close to the first plate 22001 to form a connecting portion 22005.

[0087] In this embodiment, as shown in Figure 2-8, each contact unit 2 also includes a unit shell 2h, and the contact mechanism 20, the arc extinguishing system and the terminal t are arranged in the unit shell 2h, which is conducive to forming a modular structure. Preferably, the contact mechanism 20 is arranged in the unit shell 2h, and the terminal t is arranged on the outside of the two ends of the unit shell 2h and is correspondingly arranged in the wiring slot of the shell 1. The unit shell 2h is provided with a threading hole at the position corresponding to the terminal t, and the second end of the static contact 220 is connected to the terminal t through the threading hole; the arc extinguishing system is correspondingly arranged in the unit shell 2h between the contact mechanism 20 and a terminal t, and unit exhaust ports 2e connected to the arc extinguishing system are respectively provided at both ends of the unit shell 2h to facilitate the discharge of exhaust gas. The unit exhaust port 2e corresponds to the wiring slot of the shell 1, which can both discharge exhaust gas and reduce the number of holes opened on the shell 1.

[0088] A linkage groove 20h is provided in the middle of the unit housing 2h, and the central axis of the linkage groove 20h is parallel to the first direction. The moving contact assembly 21 is linked to the linkage assembly 3A through the linkage groove 20h, and the linkage part 200b slides through the linkage groove 20h. The linkage part 200b protrudes and extends outside the unit housing 2h, and is used to be linked and connected with the electromagnetic operating system 3 and the adjacent moving contact assembly 21 respectively. The linkage from the outside of the contact unit 2 can avoid affecting the inside. The electromagnetic operating system 3 is driven and connected to the transmission rod 3c connected between the two linkage parts 200b, and can synchronously drive all the moving contact assemblies 21, thereby ensuring the consistency of the actions of multiple moving contact assemblies 21.

[0089] As shown in Figure 7, a first limiting groove 22h is respectively provided on both sides of the linkage groove 20h, and each first limiting groove 22h corresponds to the upper side of the arc extinguishing system in the first direction, and the bottom surface of the first limiting groove 22h is recessed toward the interior of the unit housing 2h, so that each electromagnetic drive mechanism 3m is assembled in a first limiting groove 22h, which can reduce the height protruding from the unit housing 2h in the first direction, thereby ensuring the assembly stability and helping to reduce the overall height of the switch device. In this embodiment, the middle part of the bottom surface of the first limiting groove 22h is recessed toward the interior of the unit housing 2h to form a step surface, and the lower area in the middle is used to limit the electromagnetic drive mechanism The coil assembly 32 in the structure 3m, the higher area surrounding the lower area in the middle serves as the yoke mounting groove 2g, and the yoke arranged on the outside of the coil assembly 32 is correspondingly limited therein; a semicircular groove is provided in the unit shell 2h on at least one side of the linkage groove 20h, and the semicircular groove and the linkage groove 20h are arranged side by side in the third direction, and the two adjacent unit shells 2h are arranged side by side so that the two semicircular grooves are connected to form a circular second limiting groove 2l, and each second limiting groove 2l is spaced relative to the third limiting groove 33b for limiting the assembly of an elastic reset component 7, so that each elastic reset component 7 is located between two adjacent linkage parts 200b.

[0090] As shown in Figure 7, a limit platform 23h is further provided inside the unit shell 2h corresponding to the linkage groove 20h. The limit platform 23h is spaced apart from the static contact group 22, so that the moving contact bridge 201 moves between the static contact group 22 and the limit platform 23h. When in the opening position, the limit portion 2013 abuts against the limit platform 23h, thereby limiting the moving range of the moving contact bridge 201. When the moving contact bridge 201 is repelled, the limit portion 2013 of the moving contact bridge 201 abuts against the limit platform 23h, so that the elastic device 202 can be reset when the contact support 200 moves to the opening position.

[0091] In this embodiment, each arc extinguishing system includes an arc extinguishing chamber 24, an arc striking plate 27 and a magnetizing component 23, wherein the arc extinguishing chamber 24 and the arc striking plate 27 can adopt the existing structure, each dynamic contact portion 2011 and the static contact portion 22004 correspond to the arc entrance port of the arc extinguishing chamber 24, one end of the arc striking plate 27 is connected to the end of the static contact portion 22004, that is, one end of the arc striking plate 27 is connected to the connecting portion 22005, and the other end of the arc striking plate 27 extends along one side of the arc entrance port into the arc extinguishing chamber 24, and the end of the arc extinguishing chamber 24 away from the arc entrance port is provided with an exhaust hole for discharging exhaust gas.

[0092] As shown in Figures 6-9, the magnetizing part 23 is preferably a strip-shaped plate structure. The middle part of the magnetizing part 23 passes through the gap between the static contact part 22004 and the first end of the static contact 220, and the two ends of the magnetizing part 23 are bent and extended toward the direction of the dynamic contact part 2011 to form a magnetizing wall. Each dynamic contact part 2011 and the static contact part 22004 contact or separate in the gap between the two magnetizing walls, which enhances the magnetic field at the dynamic contact part 2011 and the static contact part 22004, which is beneficial to introduce the arc generated when the contact mechanism 20 is disconnected into the arc extinguishing chamber 24, thereby improving the arc striking and arc extinguishing efficiency.

[0093] In this embodiment, as shown in Figure 9, each arc extinguishing system also includes a pair of arc isolation plates 26, and the two arc isolation plates 26 are arranged between the two magnetizing walls with a gap between them. A dynamic contact part 2011 and a static contact part 22004 are in contact or separation in the gap between the pair of arc isolation plates 26. In this embodiment, the pair of arc isolation plates 26 and the pair of magnetizing walls are all spaced apart in the third direction, and the arc is separated from the magnetizing walls by the arc isolation plates 26 to prevent the arc from contacting the magnetizing walls.

[0094] In addition, in this embodiment, as shown in Figure 7, an arc extinguishing channel 21h is provided inside the unit shell 2h, and the arc extinguishing channel 21h is connected between the unit exhaust port 2e and the exhaust hole. In the figure, the arc extinguishing channel 21h is bent and extended, which is conducive to buffering and cooling the exhaust gas discharged from the arc extinguishing chamber 24. Preferably, at least one metal partition 25 is also provided in the arc extinguishing channel 21h. The metal partition 25 is arranged at an angle to the side wall of the arc extinguishing channel 21h to change the direction of gas flow and to prevent impurities in the exhaust gas from being discharged outside the unit shell 2h. At the same time, the metal partition 25 is also mainly used to filter charged or metal particles after arc erosion.

[0095] As shown in Figures 7 and 8, each contact unit 2 also includes a current detection device 28 and a connecting circuit board 29. The current detection device 28 is connected to the contact mechanism 20. The connection terminal of the current detection device 28 extends to the outside of the unit housing 2h and is connected to the connecting circuit board 29, which is connected to the control circuit board of the control system via the connecting circuit board 29.

[0096] In this embodiment, the current detection device 28 is connected to the middle part of a static contact 220. In the figure, the middle part of the static contact 220 is arranged along the gap between the arc extinguishing chamber 24 and the unit shell 2h. The connection terminal of the current detection device 28 is located on the side of the static contact 220 facing away from the arc extinguishing chamber 24 and extends out of the unit shell 2h. The connecting circuit board 29 (see Figure 16) is arranged to fit the outer surface of the unit shell 2h and is connected to the control circuit board of the control unit by the connecting circuit board 29.

[0097] Preferably, a mounting groove 2p for mounting a connecting circuit board 29 is provided on the outer surface of the unit housing 2h, one end of the mounting groove 2p is linked to the wiring terminal, and the other end extends to one side of the adjacent electromagnetic drive mechanism 3m and is connected to the first limiting groove 22h for limiting the electromagnetic drive mechanism 3m, so that the connecting circuit board 29 and the electromagnetic drive mechanism 3m are jointly connected to the control circuit board. In Figure 2, two mounting grooves 2p are provided on the outer surface of the unit housing 2h, and the two mounting grooves 2p are spaced opposite to each other in the second direction. The groove depth of each mounting groove 2p is greater than or equal to the thickness of the connecting circuit board 29, so that the connecting circuit board 29 arranged in the mounting groove 2p will not protrude from the outer surface of the unit housing 2h. In this way, the external wiring of the connecting circuit board 29 will neither penetrate the contact unit 2 to interfere with the internal structure, nor increase the thickness of the switching device.

[0098] A second embodiment of a switch device is provided in conjunction with Figures 15-16.

[0099] The switching device includes a shell 1, in which a control system identical to that of the first embodiment and at least one contact unit 2 are arranged. An electromagnetic operating system 3 is also arranged in the shell 1. The electromagnetic operating system 3 and the contact unit 2 are arranged along a first direction. The electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage assembly 3A. The structure of the electromagnetic drive mechanism 3m can be the same as that of the first embodiment. The difference from the first embodiment is that the electromagnetic drive mechanism 3m, the linkage assembly 3A and the contact mechanism 20 are arranged in sequence along the first direction. That is, in the first direction, the moving trajectory of the electromagnetic drive mechanism 3m no longer corresponds to the top of the arc extinguishing system, but is collinear with the moving trajectory of the linkage assembly 3A. This increases the height of the switching device to a certain extent, but does not increase the overall width or thickness.

[0100] Furthermore, the linkage component 3A can be simplified to include only the linkage part 3b, and the electromagnetic drive mechanism 3m and the linkage part 3b are arranged along the first direction, and the linkage part 3b drives one or more contact units 2. Of course, the linkage component 3A can also include a linkage rod (not shown), but the central axis of the linkage rod is parallel to the first direction, and the two ends of the linkage rod are respectively connected to the electromagnetic drive mechanism 3m and the linkage part 3b; of course, the linkage component 3A can also include only the linkage rod, but the linkage rod arranged along the first direction can only drive one contact unit 2. At this time, a drive hole along the first direction needs to be opened on the linkage part 200b for connecting with the linkage rod.

[0101] As shown in FIG16 , the linkage member 3b is a plate-shaped structure as a whole, and a first linkage hole 300b is provided in the middle of the linkage member 3b, and the central axis of the first linkage hole 300b is parallel to the first direction. The opposite ends of the linkage member 3b are bent and extended in the same direction to form a pair of spaced-apart side walls, and at least one second linkage hole 320b is provided on each side wall, and the central axis of the second linkage hole 320b is parallel to the third direction. The linkage portion 200b of at least one contact unit 2 is provided with a transmission rod 3c, and the transmission rod 3c is matched with the second linkage hole 320b to realize electromagnetic drive. The mechanism 3m drives the contact mechanism 20 to open and close the switch; the gap between a pair of side walls can serve as an avoidance groove 31b of the linkage part 3b, and the avoidance groove 31b corresponds to the linkage part 200b of a contact support 200, or, when there are two or more contact units 2, the avoidance groove 31b can simultaneously accommodate the linkage part 200b of one or two contact units 2. Preferably, the avoidance groove 31b corresponds to accommodating the linkage part 200b of one or two contact units 2 located in the middle position, thereby facilitating the formation of a symmetrical structure and ensuring that the contact mechanism 20 of multiple contact units 2 is subjected to balanced driving force.

[0102] In addition, in the embodiment, the electromagnetic operating system 3 may no longer be provided with the elastic reset member 7.

[0103] It should be noted that, in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are conventionally placed in use. They are intended solely for ease of description and do not necessarily require the devices or components referred to to have a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0104] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A switching device, comprising a housing (1), an electromagnetic operating system (3) and at least one contact unit (2), wherein the electromagnetic operating system (3) includes an electromagnetic driving mechanism (3m) and a linkage assembly (3A), the electromagnetic driving mechanism (3m) moves along a first direction (Y), each contact unit (2) includes two terminal blocks (t) spaced along a second direction (X), a contact mechanism (20) is arranged between the two terminal blocks (t), the linkage assembly (3A) is linked between the electromagnetic driving mechanism (3m) and the contact mechanism (20) of at least one contact unit (2), the first direction (Y) is perpendicular to the second direction (X), and is characterized in that: The electromagnetic operating system (3) and the contact unit (2) are arranged along the first direction (Y), the linkage assembly (3A) and the contact mechanism (20) are arranged along the first direction (Y), the electromagnetic driving mechanism (3m) and the linkage assembly (3A) are arranged side by side along the second direction (X), and the electromagnetic driving mechanism (3m) drives a moving contact assembly (21) in at least one contact mechanism (20) to move in the first direction (Y) through the linkage assembly (3A).

2. The switching device according to claim 1, wherein: The electromagnetic operating system (3) includes two electromagnetic driving mechanisms (3m), and the two electromagnetic driving mechanisms (3m) are spaced along the second direction (X), and the linkage assembly (3A) is linked and connected between the two electromagnetic driving mechanisms (3m).

3. The switching device according to claim 1 or 2, characterized in that: The electromagnetic operating system (3) further includes at least one elastic reset member (7), and in the second direction (X), the elastic reset member (7) is arranged between the two electromagnetic driving mechanisms (3m) for cooperating with the linkage assembly (3A) to drive the electromagnetic driving mechanism (3m) to reset, and in the third direction (Z), adjacent elastic reset members (7) are arranged at intervals, and the third direction (Z) is perpendicular to the first direction (Y) and the second direction (X) respectively.

4. The switching device according to claim 1 or 2, characterized in that: The contact unit (2) further includes a unit housing (2h), the contact mechanism (20) is arranged in the unit housing (2h), a first limiting groove (22h) is formed outside the unit housing (2h), and the bottom surface of the first limiting groove (22h) is recessed towards the inside of the unit housing (2h) for limiting and assembling the electromagnetic driving mechanism (3m).

5. The switch device according to claim 4, wherein: The contact mechanism (20) includes a moving contact assembly (21) and a static contact group (22) spaced relatively in the first direction (Y), a linkage portion (200b) is arranged on one side of the moving contact assembly (21) facing away from the static contact group (22), and the linkage portion (200b) extends out from a linkage groove (20h) formed in the unit housing (2h) for driving cooperation with the linkage assembly (3A), and adjacent linkage portions (200b) are arranged at intervals in the third direction (Z), and the third direction (Z) is perpendicular to the first direction (Y) and the second direction (X) respectively.

6. The switching device according to claim 5, wherein: The moving contact assembly (21) includes a contact support (200), a moving contact bridge (201), and an elastic device (202). The linkage portion (200b) is disposed on a side of the contact support (200) facing away from the moving contact bridge (201). The contact support (200) is provided with an assembly cavity, and the elastic device (202), the moving contact bridge (201), and a connecting member (203) disposed on the moving contact bridge (201) are disposed in the assembly cavity. A first end and a second end of the elastic device (202) are respectively connected to the connecting member (203) and the contact support (200).

7. The switching device according to claim 6, characterized in that: At least one limiting platform (23h) is disposed in the unit housing (2h). The limiting platform (23h) is spaced opposite to the static contact group (22), and the moving contact bridge (201) moves between the limiting platform (23h) and the static contact (220).

8. The switching device according to claim 6, wherein: The static contact group (22) includes two static contacts (220) spaced apart in the second direction (X). Each static contact (220) is disposed along a side position in the unit housing (2h). A static contact portion (22004) is provided at a first end of the static contact (220). The static contact portion (22004) is spaced opposite to a moving contact portion (2011) of the moving contact assembly (21) in the first direction (Y). A second end of the static contact (220) is connected to an adjacent terminal (t).

9. The switching device according to claim 8, characterized in that: The first end of the static contact (220) is spaced opposite to the moving contact assembly (21). The end of the first end is bent and extended to form a static contact portion (22004). The static contact portion (22004) is spaced opposite to a moving contact portion (2011) of the moving contact assembly (21). A magnetic enhancing member (23) is disposed in a gap between the static contact portion (22004) and the first end. A second end of the static contact (220) is connected to an adjacent terminal (t).

10. The switching device according to claim 8, characterized in that: Each contact unit (2) further includes a current detection device (28). The current detection device (28) is connected to the middle of the static contact (220), and a wiring terminal of the current detection device (28) extends outside the unit housing (2h).

11. The switching device according to claim 8, characterized in that: The current detection device (28) is further connected to a connection circuit board. The connection circuit board is attached to an outer surface of the unit housing (2h). An installation groove (2p) for installing the connection circuit board is provided on the outer surface of the unit housing (2h). One end of the installation groove (2p) communicates with the wiring terminal, and the other end communicates with a first limiting groove (22h) for limiting the electromagnetic driving mechanism (3m). The depth of the installation groove (2p) is greater than or equal to the thickness of the connection circuit board.

12. The switching device according to claim 1, wherein: The linkage assembly at least includes a linkage rod (3r). Two ends of the linkage rod (3r) are respectively connected to two electromagnetic driving mechanisms (3m), and the moving contact assembly (21) is driven by the middle of the linkage rod (3r).

13. The switching device according to claim 12, characterized in that: The linkage assembly further includes a linkage member (3b), at least one first linkage hole (300b) is formed in the linkage member (3b), the linkage rod (3r) passes through the first linkage hole (300b) along the second direction (X), at least one second linkage hole (320b) is formed in the linkage member (3b), and the second linkage hole (320b) is used for linkage connection with the moving contact assembly (21).

14. The switching device according to claim 2, characterized in that: An operation key (b) is provided outside the housing (1), a control system is further provided inside the housing (1), the operation key (b) and the electromagnetic operating system (3) are respectively connected to the control system, and pressing the operation key (b) triggers the control system to drive the electromagnetic operating system (3) to act; an arc extinguishing system is provided between the contact mechanism (20) and the adjacent terminal (t), and the electromagnetic driving mechanism (3m) and the adjacent arc extinguishing system are arranged along the first direction (Y).

15. The switching device according to claim 1, characterized in that: It includes two or more contact units (2) arranged side by side in the third direction (Z), and the moving contact assemblies (21) of adjacent two contact units (2) are linked, and the third direction (Z) is perpendicular to the first direction (Y) and the second direction (X) respectively.

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