Switching device

Abstract

The switching device comprises a shell, an electromagnetic operating system and at least one contact unit, the electromagnetic operating system comprises an electromagnetic driving mechanism and a linkage assembly, the electromagnetic driving mechanism moves in the first direction, each contact unit comprises two wiring terminals arranged at intervals in the second direction, a contact mechanism is arranged between the two wiring terminals, and the linkage assembly is arranged between the two wiring terminals. The linkage assembly is linked between the electromagnetic driving machine and the contact mechanism, the first direction is perpendicular to the second direction, the electromagnetic operating system and the contact unit are arranged in the first direction, the linkage assembly and the contact mechanism are arranged in the first direction, and the electromagnetic driving mechanism and the linkage assembly are arranged side by side in the second direction. And the electromagnetic driving mechanism drives the moving contact assembly in the at least one contact mechanism to move in the first direction through the linkage assembly. The movement tracks of the electromagnetic driving mechanism and the linkage assembly are prevented from being collinear in the first direction, the height of the switching device is reduced, excessive space is prevented from being occupied, and miniaturization design is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to a switching device. Background Art

[0002] A switching device is a device for controlling the on-off of a circuit. The switching device includes an electromagnetic operating system and at least one contact unit, and the contact mechanism of the contact unit is driven by the electromagnetic operating system to switch on and off.

[0003] 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 action synchronization of multiple contact units.

[0004] In another part of the products, the electromagnetic operating system and the contact unit are arranged in the up-down direction. The electromagnetic operating system drives the moving contact assembly in the contact unit through a linkage component. Since the moving track of the linkage component is collinear with that of the electromagnetic operating system, such a structure requires too much space in the height direction of the switching device, increasing the overall height of the switching device. Summary of the Invention

[0005] The purpose of the present invention is to overcome at least one defect of the prior art and provide a switching device with a simple structure and high reliability.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The present invention provides a switching device, including a housing, an electromagnetic operating system and at least one contact unit. The electromagnetic operating system includes an electromagnetic driving mechanism and a linkage component. The electromagnetic driving mechanism moves along a first direction. Each contact unit includes two terminal blocks spaced along a second direction. A contact mechanism is arranged between the two terminal blocks. The linkage component is linked between the electromagnetic driving mechanism and the contact mechanism of at least one contact unit. The first direction is perpendicular to the second direction.

[0008] The electromagnetic operating system and the contact unit are arranged along the first direction. The linkage component and the contact mechanism are arranged along the first direction. The electromagnetic driving mechanism and the linkage component are arranged side by side along the second direction. The moving contact assembly in at least one contact mechanism is driven by the electromagnetic driving mechanism through the linkage component to move in the first direction.

[0009] Preferably, the electromagnetic operating system includes two electromagnetic driving mechanisms. The two electromagnetic driving mechanisms are spaced along the second direction, and the linkage component is linked and connected between the two electromagnetic driving mechanisms.

[0010] Preferably, the electromagnetic operating system further includes at least one elastic reset member. In the second direction, the elastic reset member is disposed between two electromagnetic driving mechanisms and is used to cooperate with the linkage assembly to drive the electromagnetic driving mechanism to reset. In the third direction, adjacent elastic reset members are arranged at intervals, and the third direction is perpendicular to the first direction and the second direction respectively.

[0011] Preferably, the contact unit further includes a unit housing. The contact mechanism is disposed within the unit housing. A first limiting groove is formed on the outer portion of the unit housing, and the bottom surface of the first limiting groove is recessed towards the inside of the unit housing for limiting and assembling the electromagnetic driving mechanism.

[0012] Preferably, the contact mechanism includes a moving contact assembly and a static contact group that are spaced opposite to each other in the first direction. A linkage portion is disposed on the side of the moving contact assembly facing away from the static contact group. The linkage portion extends out from a linkage groove formed in the unit housing for driving and cooperating with the linkage assembly. Adjacent two linkage portions are arranged at intervals in the third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0013] Preferably, the moving contact assembly includes a contact support, a moving contact bridge, and an elastic device. The linkage portion is disposed on the side of the contact support facing away from the moving contact bridge. An assembly cavity is formed in the contact support. The elastic device, the moving contact bridge, and a connecting member disposed on the moving contact bridge are disposed within the assembly cavity. The first end and the second end of the elastic device are respectively connected to the connecting member and the contact support.

[0014] Preferably, at least one limiting platform is disposed within the unit housing. The limiting platform is spaced opposite to the static contact group, and the moving contact bridge moves between the limiting platform and the static contact.

[0015] Preferably, the static contact group includes two static contacts that are spaced apart in the second direction. Each static contact is disposed along the side position within the unit housing. A static contact portion is disposed at the first end of the static contact. The static contact portion is spaced opposite to a moving contact portion of the moving contact assembly in the first direction. The second end of the static contact is connected to an adjacent terminal.

[0016] Preferably, the first end of the static contact is spaced opposite to the moving contact assembly. The end of 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 magnetic enhancing member is disposed within the gap between the static contact portion and the first end. The second end of the static contact is connected to an adjacent terminal.

[0017] Preferably, each contact unit further includes a current detection device. The current detection device is connected to the middle of the static contact, and the connection terminal of the current detection device extends outside the unit housing.

[0018] Preferably, the current detection device is further connected to a connection circuit board, and the connection circuit board is disposed in a fitting manner on the outer surface of the unit housing.

[0019] Preferably, an installation groove for installing the connection circuit board is formed on the outer surface of the unit housing. One end of the installation groove communicates with the wiring terminal, and the other end communicates with a first limiting groove for limiting the electromagnetic driving mechanism. The groove depth of the installation groove is greater than or equal to the thickness of the connection circuit board.

[0020] Preferably, at least two wiring grooves are respectively disposed at two ends of the housing. One wiring terminal is disposed in each wiring groove, and each wiring terminal corresponds to a wire passing hole formed at two ends of the unit housing.

[0021] Preferably, an arc extinguishing system is disposed between the contact mechanism and the adjacent wiring terminal, and the electromagnetic driving mechanism and the adjacent arc extinguishing system are disposed along the first direction.

[0022] Preferably, an operation key is disposed outside the housing, and a control system is further disposed inside the housing. The operation key and the electromagnetic operation system are respectively connected to the control system. Pressing the operation key triggers the control system to drive the electromagnetic operation system to act.

[0023] Preferably, it includes two or more contact units arranged side by side in the third direction. The moving contact assemblies of adjacent two contact units are connected in a linkage manner, and the third direction is perpendicular to the first direction and the second direction respectively.

[0024] In the switch device of the present invention, the electromagnetic operation system as a whole is disposed along the first direction with the contact unit, avoiding increasing the overall thickness or width of the switch device. Among them, the linkage assembly and the electromagnetic driving mechanism are arranged side by side in the second direction, avoiding the moving tracks of the electromagnetic driving mechanism and the linkage assembly being collinear in the first direction, which is beneficial to reducing the height of the switch device, avoiding occupying too much space, and being beneficial to meeting the miniaturization design of the switch device.

[0025] In addition, the electromagnetic operation system includes two electromagnetic driving mechanisms, and the two electromagnetic driving mechanisms 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 operation system for driving multiple contact mechanisms.

[0026] In addition, the elastic resetting member is arranged side by side with the electromagnetic driving mechanism, and can reset the electromagnetic driving mechanism and the linkage assembly simultaneously, making full use of the space inside the housing.

[0027] In addition, the first limiting groove of the unit housing can limit and assemble the electromagnetic driving mechanism. The first limiting groove recessed into the interior of the unit housing can make full use of the space inside the housing, which is beneficial to reducing the height of the switch device in the first direction.

[0028] 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.

[0029] In addition, a magnetic enhancement part is arranged in the gap between the static contact part in the static contact and the first end, which can increase the magnetic field at the static contact part and the dynamic contact part, facilitating arc ignition. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the switching device of the present invention;

[0031] Figure 2 is a schematic structural diagram of the switching device of the present invention after removing the housing;

[0032] Figure 3 is a schematic diagram of the electromagnetic drive mechanism and the linkage assembly in the present invention;

[0033] Figure 4 is a schematic structural diagram of the electromagnetic operating system and the contact unit in the present invention;

[0034] Figure 5 is a schematic structural diagram of the disassembled electromagnetic operating system and the contact unit in the present invention;

[0035] Figure 6 is a schematic internal structure diagram of the contact unit in the present invention;

[0036] Figure 7 is a front view of the internal structure of the contact unit in the present invention;

[0037] Figure 8 is a cross-sectional view of the contact unit in the present invention;

[0038] Figure 9 is a schematic structural diagram of the contact mechanism in the present invention;

[0039] Figure 10 is a schematic structural diagram of the moving contact assembly in the present invention;

[0040] Figure 11 is a schematic structural diagram of the elastic device in the first equilibrium position in the present invention;

[0041] Figure 12 is a schematic structural diagram of the elastic device in the second equilibrium position in the present invention;

[0042] Figure 13 is a cross-sectional view of the contact support in the present invention;

[0043] Figure 14 is a schematic structural diagram of the moving contact bridge, the connecting piece and the spring device in the present invention;

[0044] Figure 15It is a schematic structural diagram of the switching device in the present invention (only including one electromagnetic driving mechanism);

[0045] Figure 16 is Figure 15 a schematic diagram of the linkage member and the contact unit in;

[0046] Reference numerals:

[0047] 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 groove, 21h - arc extinguishing channel, 22h - first limiting groove, 23h - limiting platform, 2p - installation groove, 2g - yoke installation groove, 2e - unit exhaust port, 2l - second limiting groove, 20 - contact mechanism, 21 - moving contact assembly, 200 - contact support, 200b - linkage part, 2010b - connecting hole, 200c - bearing part, 2001c - top wall of bearing part, 2002c - bottom wall of bearing part, 2003c - front wall of bearing part, 2004c - rear wall of bearing part, 200d - longitudinal cavity, 200e - transverse cavity, 2001e - connection area, 2002e - stop wall, 201 - moving contact bridge, 2011 - moving contact part, 2012 - moving contact point, 201 - 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 point, 23 - magnetic enhancement part, 24 - arc extinguishing chamber, 25 - metal partition, 26 - arc separating plate, 27 - arc leading plate, 28 - current detection device, 29 - connecting circuit board, 3 - electromagnetic operating system, 3m - electromagnetic driving mechanism, 3A - linkage assembly, 31 - moving iron core, 32 - coil assembly, 33 - static iron core, 3c - transmission rod, 3b - linkage member, 30b - linkage member 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 implementation manners

[0048] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the switching device of the present invention. The switching device of the present invention is not limited to the descriptions of the following embodiments.

[0049] As Figure 1 、 2As shown in FIGS. 6-9, the switching device includes a housing 1. One side of the housing 1 serves as an operating end and is provided with an operating key b. A control system (not shown), an electromagnetic operating system 3, and at least one contact unit 2 are arranged inside the housing 1. The operating key b and the electromagnetic operating system 3 are respectively connected to the control system. By pressing the operating key b, the control system is triggered, so that the electromagnetic operating system 3 operates according to the control signal of the control system. Of course, without setting the operating key b, directly outputting the control signal by the control system to drive the electromagnetic operating system 3 is also possible. The electromagnetic operating system 3 includes an electromagnetic driving mechanism 3m and a linkage assembly 3A. Each contact unit 2 at least includes a pair of terminal blocks t and a contact mechanism 20 connected between the pair of terminal blocks t. The contact mechanism 20 includes a movable contact assembly 21 and a static contact group 22 that cooperate with each other. Adjacent movable contact assemblies 21 are linked and connected. The electromagnetic driving mechanism 3m is drivingly connected to at least one movable contact assembly 21 through the linkage assembly 3A.

[0050] Further, as Figures 6 - 9 shown, each contact unit 2 further includes two arc extinguishing systems. Each arc extinguishing system is arranged between a terminal block t and the contact mechanism 20. The arc extinguishing systems cooperate to extinguish the arc generated by the breaking of the contact mechanism 20. An air outlet for exhausting tail gas is provided on the housing 1.

[0051] For convenience of description, taking the moving direction of the electromagnetic driving mechanism 3m as the first direction, in Figure 2 it, taking the direction where the Y-axis is located as the first direction, the movable contact assembly 21 and the static contact group 22 are spaced opposite to each other in the first direction. The two directions perpendicular to the first direction are respectively the second direction and the third direction. In Figure 2 it, taking the direction where the X-axis is located as the second direction and the direction where the Z-axis is located as the third direction, a pair of terminal blocks t are spaced apart in the second direction. The contact mechanism 20 is located between the pair of terminal blocks t. When multiple contact units 2 are arranged inside the housing 1, adjacent two contact units 2 are arranged side by side in the third direction.

[0052] The improvement point of the present application is that, as Figures 1 - 3 shown, the electromagnetic operating system 3 and the contact unit 2 are arranged along the first direction, the linkage assembly 3A and the contact mechanism 20 are arranged along the first direction, the electromagnetic driving mechanism 3m and the linkage assembly 3A are arranged side by side along the second direction, and the electromagnetic driving mechanism 3m drives the movable contact assembly 21 in at least one contact mechanism 20 to move in the first direction through the linkage assembly 3A.

[0053] In this way, the electromagnetic operating system 3 is disposed as a whole along the first direction with the contact unit 2, avoiding increasing the thickness or width of the overall switching device. Among them, the linkage assembly 3A and the electromagnetic driving mechanism 3m are arranged side by side in the second direction, avoiding the movement trajectories of the electromagnetic driving mechanism 3m and the linkage assembly 3A being collinear in the first direction, which is beneficial to reducing the height of the switching device, avoiding occupying too much space, and facilitating the miniaturized design of the switching device.

[0054] Further, as Figure 2 , 3 shown, the electromagnetic operating system 3 includes two electromagnetic driving mechanisms 3m. In the second direction, the two electromagnetic driving mechanisms 3m are arranged at intervals, and the linkage assembly 3A is located between the two electromagnetic driving mechanisms 3m. The two electromagnetic driving mechanisms 3m and the moving contact assembly 21 are connected together by the linkage assembly 3A. The two electromagnetic driving mechanisms 3m jointly drive the contact mechanism 20 to close and open, 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.

[0055] Further, as Figure 4 , 5 shown, the electromagnetic operating system 3 further includes at least one elastic reset member 7. In the second direction, the elastic reset member 7 is disposed between the two electromagnetic driving mechanisms 3m. In the third direction, adjacent elastic reset members 7 are arranged at intervals. Preferably, one elastic reset member 7 is provided between adjacent two contact units 2, and two contact units 2 share one elastic reset member 7, which can not only simplify the structure but also reduce the cost.

[0056] Combined with Figures 1 - 14 A first embodiment of a switching device is provided.

[0057] As Figures 1 - 5 shown, the switching device includes a housing 1. The opposite ends of the housing 1 are respectively used as wiring terminals. Each wiring terminal is provided with at least one wiring groove, and each wiring groove is correspondingly provided with an operation hole and a wiring hole for convenient operation and wiring. The connecting wire between the two wiring terminals is parallel to the second direction. One side of the housing 1 between the two wiring terminals is used as an operation end, and an operation key b is provided on the operation end. The pressing direction of the operation key b is parallel to the first direction. Figure 1 In , the operation end protrudes from the middle of the housing 1, making the overall housing 1 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, and the operation end corresponds to the middle position of the upper cover 1u. The operation key b is a button and can be divided into a closing key b1 and a tripping key b2. Figure 1 In , the closing key b1 and the tripping key b2 are arranged at intervals in the third direction. Of course, the switching device may also not be provided with the operation key b, and the electromagnetic operating system 3 can also be directly driven remotely by the control system.

[0058] A control system, an electromagnetic operating system 3, and at least one contact unit 2 are provided inside the housing 1. The control system includes a control circuit board. 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 provided 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 Figures 2 - 5 shown, the number of the contact units 2 is multiple. Two adjacent contact units 2 are arranged side by side in the third direction. The electromagnetic operating system 3 is at least linked and connected to the contact mechanism 20 of one of the contact units 2. Correspondingly, the opening and closing directions of the contact mechanisms 20 of each contact unit 2 also proceed along the first direction.

[0059] As Figures 2 - 8 shown, the electromagnetic operating system 3 includes an electromagnetic driving mechanism 3m and a linkage assembly 3A. Each contact unit 2 includes a pair of terminal blocks t arranged at intervals in the second direction. A contact mechanism 20 is connected between the pair of terminal blocks t. The contact mechanism 20 includes a moving contact assembly 21 and a static contact group 22 spaced relatively in the first direction. The electromagnetic driving mechanism 3m is linked and connected to the moving contact assembly 21 of at least one contact unit 2 through the linkage assembly 3A. The moving contact assemblies 21 of two adjacent contact units 2 are linked and connected. That is, a transmission rod 3c is connected between two adjacent moving contacts. The electromagnetic operating system 3 can be drivingly connected to one of the moving contact assemblies 21 through the linkage assembly 3A. The remaining moving contact assemblies 21 synchronously act under the linkage action of the transmission rod 3c. Preferably, the linkage assembly 3A is linked and connected to the transmission rod 3c, so that all the moving contact assemblies 21 are synchronously driven by the electromagnetic operating system 3, ensuring the action consistency.

[0060] Combined with Figures 2 - 5 A specific structure of the electromagnetic operating system 3 is provided. The electromagnetic operating system 3 includes an electromagnetic driving mechanism 3m and a linkage assembly 3A. The operation key b, the linkage assembly 3A, and the moving contact assembly 21 are sequentially arranged along the first direction. The electromagnetic driving mechanism 3m moves along the first direction and is arranged side by side with the linkage assembly 3A in the second direction. The electromagnetic driving 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 driving mechanism 3m synchronously drives all the moving contact assemblies 21 to move along the first direction through the linkage assembly 3A. Figure 2 、 3Among them, the electromagnetic driving mechanism 3m is corresponding to between the contact mechanism 20 and a wiring terminal t, so that the electromagnetic driving mechanism 3m moves linearly in the area corresponding to above the arc extinguishing system. That is, in the first direction, the movement track of the electromagnetic driving mechanism 3m and the movement track of the linkage assembly 3A are not on the same straight line, which is beneficial to reducing its height.

[0061] Furthermore, as Figure 4 , 5 shown, the electromagnetic operating system 3 further includes an elastic resetting member 7. The elastic resetting member 7 cooperates with the linkage assembly 3A to reset the electromagnetic driving mechanism 3m and the linkage assembly 3A. Preferably, in the second direction, the elastic resetting member 7 is arranged between two electromagnetic driving mechanisms 3m. In the third direction, the elastic resetting member 7 is arranged on the unit housing 2h between two contact units 2. Two adjacent contact units 2 share one elastic resetting member 7, which is beneficial to reducing costs.

[0062] In this embodiment, as Figure 2 shown, the electromagnetic driving mechanism 3m includes a yoke, a coil assembly 32 and a moving assembly. The yoke is arranged around the outside of the coil assembly 32. The coil assembly 32 includes a coil bobbin and a coil wound around the outside of the coil bobbin. The moving assembly includes a moving iron core 31 and a static iron core 33. The static iron core 33 and the moving iron core 31 are respectively arranged at opposite ends of the coil bobbin. Each coil bobbin is arranged in the housing 1 along the first direction. The moving iron core 31 is driven by the coil assembly 32 to move along the first direction according to a control signal. The two coil bobbins are arranged at intervals in the second direction. The two moving iron cores 31 are arranged at intervals in the second direction and are linked by a linkage assembly 3A. Of course, the electromagnetic driving mechanism 3m can also adopt the existing technology.

[0063] As Figures 3 - 5 shown, the linkage assembly 3A includes a linkage rod 3r and a linkage member 3b. Both ends of each linkage rod 3r are respectively connected to 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 with 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. The adjacent two linkage rods 3r are arranged side by side in the third direction, which is beneficial to ensuring the stable linkage of the two electromagnetic driving mechanisms 3m. In the third direction, preferably, the linkage member 3b is drivingly connected to the contact mechanism 20 of one or two contact units 2 located in the middle position, which is beneficial to ensuring the synchronization of the opening and closing actions of all contact mechanisms 20.

[0064] As Figures 2 - 5As shown, the linkage member 3b includes a block-shaped linkage member body 30b, an open groove as an avoidance groove 31b is opened in the middle of one side of the linkage member 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 member 3b in the first direction (height direction), and a first linkage hole 300b for the linkage member 3b to pass through is opened on the other side of the linkage member body 30b. Figure 5 In the embodiment, the avoidance groove 31b and the first linkage hole 300b are arranged along the center line of the linkage member 3b, so that the linkage member 3b has a symmetrical structure.

[0065] 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.

[0066] 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, so that the linkage member 3b drives the contact mechanism 20. Figures 2 - 5 In the figure, 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 side of the linkage bridge arm 32b facing the contact unit 2 is provided with a third limiting groove 33b, and one end of the elastic reset member 7 is elastically abutted against the third limiting groove 33b. In the figure, the elastic reset 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.

[0067] 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 of two electromagnetic drive mechanisms 3m, the driving force on the contact mechanism 20 is smaller, which is suitable for switch devices with fewer contact units 2.

[0068] Combine Figures 5 - 14 Provide a specific structure of the contact unit 2.

[0069] The contact unit 2 includes a pair of terminal blocks t, a contact mechanism 20 and two arc extinguishing systems. Among them, the pair of terminal blocks t are arranged at intervals in the second direction. The contact mechanism 20 is connected between the pair of terminal blocks t to control the on and off of the main circuit of each contact unit 2. Each arc extinguishing system is arranged between the contact mechanism 20 and a terminal block t. Each arc extinguishing system includes an arc extinguishing chamber 24. The arc inlet of the arc extinguishing chamber 24 is connected to the contact mechanism 20. One end of the arc extinguishing chamber 24 away from the arc inlet is provided with an exhaust hole for exhausting tail gas. Among them, the terminal block t and the arc extinguishing chamber 24 can adopt the existing technology.

[0070] As Figures 6 - 10 shown, the contact mechanism 20 includes a moving contact assembly 21 and a static contact group 22 that are spaced opposite to each other in the first direction. The static contact group 22 includes two static contacts 220. In the second direction, the two static contacts 220 are arranged at intervals between the two terminal blocks t. The first end of each static contact 220 is provided with a static contact part 22004. The middle part of the static contact 220 extends along the side close to the arc extinguishing chamber 24, so that the second end of the static contact 220 is connected to a terminal block 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 part 200b is provided on the side of the contact support 200 facing away from the moving contact bridge 201. The adjacent two linkage parts 200b are linked and connected by a transmission rod 3c. The two ends of the moving contact bridge 201 are respectively used as moving contact parts 2011. Each moving contact part 2011 contacts or separates from a corresponding static contact part 22004 at the arc inlet of the arc extinguishing chamber 24.

[0071] Preferably, as Figure 8 、 11 -14 shown, the moving contact assembly 21 further includes two elastic devices 202. A connecting piece 203 is provided in the middle of the moving contact bridge 201. The connecting piece 203 is fixed to the moving contact bridge 201 by riveting or welding. The first end and the second end of each elastic device 202 are respectively linked and connected to the contact support 200 and the connecting piece 203, so that the two elastic devices 202 cooperate to switch between the first balance position, the dead point position and the second balance position. The dead point position is located between the first balance position and the second balance position. Preferably, the two elastic devices 202 are symmetrically arranged, thereby ensuring that the moving contact bridge 201 is evenly stressed and avoiding the deviation of the moving track of the moving contact bridge 201.

[0072] Further, the second ends of the two elastic devices 202 are elastically pressed against each other. That is, at 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. The elastic deformation amount of each elastic device 202 at the first equilibrium position and the second equilibrium position is smaller than that 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 connecting member 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 cross the dead point position and switch to and remain at the second equilibrium position.

[0073] As Figure 8 , 11 shown, during normal opening and closing, the two elastic devices 202 are maintained at the first equilibrium position with an included angle. Each elastic device 202 can apply a pressure to the moving contact bridge 201. In the closed state, the pressure applied by each elastic device 202 can be used as the contact pressure between the moving contact portion 2011 and the static contact portion 22004. When a short-circuit fault occurs, the electrodynamic 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 the first direction along the 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 together, causing the two elastic devices 202 to switch to and remain at the dead point position or the second equilibrium position with an included angle (see Figure 12 ), at this time, the two elastic devices 202 can limit the movement of the moving contact bridge 201 in the direction close to the static contact 220, avoiding re-contact with the static contact set 22 due to the reduction of the electrodynamic force, so as to prevent welding between the contacts.

[0074] Preferably, as Figures 10 - 13 shown, one end of the contact support 200 serves as the linkage portion 200b. At least one connection hole 2010b is provided on the linkage portion 200b. A transmission rod 3c passes through each connection hole 2010b to link adjacent two linkage portions 200b together. The other end of the contact support 200 is provided with an assembly cavity. The moving contact bridge 201 is disposed 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. The assembly cavity has a certain space in the direction perpendicular to the moving contact bridge 201. When the moving contact bridge 201 is repelled by the electrodynamic force, the moving contact bridge 201 can move along the direction perpendicular to the plane P connecting the two ends of the moving contact bridge 201 (see Figure 14) moves in the assembly cavity in a certain direction. In this embodiment, the moving contact bridge 201 moves in the assembly cavity along the first direction. Further, one end of the assembly cavity extends away from the moving contact bridge 201 to provide a moving space for the connecting member 203. When the moving contact bridge 201 moves relative to the contact support 200, the connecting member 203 moves in the assembly cavity. The first end of each elastic device 202 is rotatably connected to the side wall of the assembly cavity, so that the elastic device 202 and the connecting member 203 are in the internal space of the contact support 200, avoiding interference from external structures and ensuring the mating stability.

[0075] Combine Figures 6 - 14 Provide a specific structure of the moving contact assembly 21. The moving contact assembly 21 includes a contact support 200, a connecting member 203, a moving contact bridge 201, and two elastic devices 202. Among them, the contact support 200 includes an integrally formed linkage portion 200b and a bearing portion 200c. Two side-by-side connection holes 2010b are provided at one end of the linkage portion 200b. 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 integrally cross-shaped. Among them, the top wall 2001c of the bearing portion is respectively connected to both sides of the other end of the linkage portion 200b. The end wall of the bearing portion 200c away from the linkage portion 200b is used as the bottom wall 2002c of the bearing portion. Two pairs of side walls are connected between the bottom wall 2002c and the top wall 2001c of the bearing portion. One pair of side walls are respectively the front wall 2003c and the rear wall 2004c of the bearing portion, and the other pair of side walls are respectively the left wall and the right wall of the bearing portion. The internal hollow area of the bearing portion 200c is used as the assembly cavity. The left wall and the right wall of the bearing portion are open as the installation openings communicating with the assembly cavity. The two ends of the moving contact bridge 201 respectively extend from the installation openings to the outside of the contact support 200.

[0076] Figures 9 - 13 In it, the assembly cavity is integrally T-shaped. The assembly cavity includes a transverse cavity 200e and a longitudinal cavity 200d that communicate with each other. 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 are respectively used as connection areas 2001e. The connecting member 203 moves along the central axis of the longitudinal cavity 200d. The first end of each elastic device 202 is respectively rotatably connected to one end of the transverse cavity 200e away from the longitudinal cavity 200d, that is, connected to the connection area 2001e. The inner side wall of the transverse cavity 200e facing the moving contact bridge 201 is used 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 are switched to the second equilibrium state.

[0077] Such asFigures 6 - 12 As shown in FIGS. 13 and 14, the moving contact bridge 201 is integrally in a straight plate shape. The middle part of the moving contact bridge 201 penetrates through the assembly cavity. The two ends of the moving contact bridge 201 respectively serve as moving contact parts 2011 and extend out of the assembly cavity from the two mounting ports. In this embodiment, the plane P connected between the two ends of the moving contact bridge 201 can also be understood as the plane area connected between the two moving contact parts 2011. When the moving contact bridge 201 is arranged on the contact support 200, the plane P is perpendicular to the first direction. On the side of each moving contact part 2011 facing the static contact 220, there is a moving contact point 2012. The end of each moving contact part 2011 is bent towards the direction away from the static contact 220 to form a limiting part 201'. When the moving contact assembly 21 is in the opening position, the limiting part 201' can cooperate with the limiting platform 23h in the switching device, so as to limit the moving range of the moving contact bridge 201. In addition, after the moving contact bridge 201 is repelled, the limiting part 201' cooperates with the limiting platform 23h. When the driving contact support 200 moves towards the opening position, the abutment of the limiting part 201' and the limiting platform 23h limits the second end of the connecting piece 203 and the elastic device 202, so that the contact support 200 drives the first end of the elastic device 202 to move, so that the elastic device 202 is switched to the first balanced position.

[0078] The connecting piece 203 is arranged in the middle of the moving contact bridge 201. Figure 14 In the embodiment, the connecting piece 203 is integrally in a U-shaped structure. The connecting piece 203 includes two relatively supported walls at intervals. Between the two supported walls, there are two parallel shaft rods arranged side by side. The connecting line between the two shaft rods is parallel to the plane P connected between the two ends of the moving contact bridge 201. Each shaft rod is used for rotatably connecting with the second end of an elastic device 202. The part connected between the two supported walls can be riveted or welded to the moving contact bridge 201 for fixation.

[0079] As Figure 8 、 11 As shown in FIGS. 11, 12 and 14, each elastic device 202 includes a first connecting plate 2022, a second connecting plate 2023, a guiding rod 2024 and a spring 2021. The first connecting plate 2022 and the second connecting plate 2023 are respectively rotatably connected with the contact support 200 and the connecting piece 203. The two second connecting plates 2023 are in mutual abutment. One end of the guiding rod 2024 is connected with the first connecting plate 2022, and the other end of the guiding rod 2024 is in sliding fit with the second connecting plate 2023. The spring 2021 is sleeved on the outer side wall of the guiding rod 2024 and respectively abuts between the first connecting plate 2022 and the second connecting plate 2023. The axial length of the spring 2021 in the normal state is greater than the axial length of the guiding 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.

[0080] In this embodiment, as Figure 14As shown, the first connecting plate 2022 is of a U-shaped structure. The first connecting plate 2022 includes two first connecting arms arranged at intervals. A first intermediate plate is connected between the two first connecting arms. The two first connecting arms are rotatably connected to the assembly cavity through a shaft rod, that is, connected to one end of the transverse cavity 200e away from the longitudinal cavity 200d. One end of the guide rod 2024 is connected to the first intermediate plate; the second connecting plate 2023 is also of a U-shaped structure. The second connecting plate 2023 includes two second connecting arms arranged at intervals. The two second connecting arms are respectively rotatably connected to a shaft rod of the connecting member 203. A second intermediate plate is connected between the two second connecting arms. The other end of the guide rod 2024 slidably passes through the middle of the second intermediate plate. An anti-disengagement portion is provided at the end of the guide rod 2024 to prevent the guide rod 2024 from falling off the second intermediate plate.

[0081] As Figure 8 , 11 shown, 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 connecting 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 less 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 a "﹀"-shaped angular structure. The connection line between the hinge point o1 of the first connecting plate 2022 and the hinge point o2 of the second connecting plate 2023 forms an angle with the plane P connecting the two ends of the moving contact bridge 201. The spring 2021 is in the first compression state, and the elastic deformation direction of the spring 2021 forms an angular state with the plane P connecting the two ends of the moving contact bridge 201, so that the elastic device 202 can apply a pressure to the moving contact bridge 201, and the pressure direction is the direction close to the static contact 220. Figure 11 The direction indicated by the arrow in the figure;

[0082] When a short-circuit fault occurs, after the moving contact bridge 201 is repelled by the electrodynamic force, it moves relative to the contact support 200 along the direction away from the static contact 220, that is Figure 12In the direction indicated by the arrow, the second end of each elastic device 202 also moves accordingly. When moving through the dead center position, the line connecting 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 connecting the two ends of the moving contact bridge 201. At the dead center position, the spring 2021 is in the second compression state. At this time, the two elastic devices 202 cooperate as a whole to form a "--" structure. After the two elastic devices 202 cross the dead center position, they continue to move towards the second equilibrium position and finally remain in 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 connecting the hinge point o1 of the first connecting plate 2022 and the hinge point o2 of the second connecting plate 2023 forms an angle with the plane P connecting the two ends of the moving contact bridge 201 again. At the second equilibrium position, the two elastic devices 202 cooperate to form an angle structure in the shape of "︿". However, 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 small. 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. One end of the guide rod 2024 is slidably fitted with the middle part of the second intermediate plate, and the first connecting plate 2022 and the second connecting plate 2023 further compress the spring 2021. At this time, the elastic forces exerted by the two springs 2021 are relatively large. After the electrodynamic force decreases or disappears, the elastic device 202 maintained in the second equilibrium position can limit the movement of the moving contact bridge 201 towards the static contact 220, preventing the moving contact bridge 201 from being connected to the static contact 220 again.

[0083] It should be noted that the stop wall 2002e may not be provided in the assembly cavity, and it is also possible to only limit the continuous movement of the moving contact bridge 201 by the elastic device 202 switched to the second equilibrium position.

[0084] As Figures 6 - 9 shown, the first end of the static contact 220 is spaced opposite to the moving contact assembly 21. The end of the first end is folded back and extended to form a static contact portion 22004. The static contact portion 22004 is spaced opposite to the moving contact assembly 21. A static contact point 2201 is provided on the side of the static contact portion 22004 facing the moving contact assembly 21. There is a gap 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 part 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.

[0085] In this embodiment, the stationary contact 220 includes a stationary contact plate 2200, and the stationary contact plate 2200 includes a first plate 22001 and a second plate 22002 that are parallel to each other and extend in opposite directions. Figure 8 In the figure, the first plate 22001 and the second plate 22002 extend along 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 a connecting section 22003 is connected between the first plate 22001 and the second plate 22002. The end of the first plate 22001 extends and folds back to form a static contact portion 22004 spaced opposite to the first plate 22001, and a gap is 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, and the static contact point 2201 cooperates with the dynamic contact point 2012 of the dynamic contact portion 2011. 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.

[0086] In this embodiment, if Figures 2 - 8 As shown, each contact unit 2 also includes a unit housing 2h, and the contact mechanism 20, the arc extinguishing system and the terminal t are arranged in the unit housing 2h, which is conducive to forming a modular structure. Preferably, the contact mechanism 20 is arranged in the unit housing 2h, and the terminal t is arranged on the outside of both ends of the unit housing 2h and is correspondingly arranged in the wiring slot of the shell 1. The unit housing 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 with the terminal t through the threading hole; the arc extinguishing system is correspondingly arranged in the unit housing 2h between the contact mechanism 20 and a terminal t, and unit exhaust ports 2e connected to the arc extinguishing system are respectively opened at both ends of the unit housing 2h to facilitate the exhaust of exhaust gas. The unit exhaust port 2e corresponds to the wiring slot of the shell 1, which can not only discharge the exhaust gas, but also reduce the number of holes opened on the shell 1.

[0087] 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 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.

[0088] like Figure 7As shown, a first limiting groove 22h is provided on each side of the linkage groove 20h. Each first limiting groove 22h corresponds to the upper part of the arc extinguishing system in the first direction, and the bottom surface of the first limiting groove 22h is recessed towards the inside of the unit housing 2h. Assembling each electromagnetic driving mechanism 3m in a first limiting groove 22h can reduce the height protruding from the unit housing 2h in the first direction, which not only ensures the assembly stability but also helps to reduce the overall height of the switching device. In this embodiment, the middle part of the bottom surface of the first limiting groove 22h is recessed towards the inside of the unit housing 2h to form a stepped surface. The lower area in the middle is used to limit the coil assembly 32 in the electromagnetic driving mechanism 3m, and the higher area surrounding the lower area in the middle serves as a yoke mounting groove 2g, and the yoke arranged around the outside of the coil assembly 32 is correspondingly limited therein; at least on one side of the linkage groove 20h, a semi-circular groove is provided on the unit housing 2h. The semi-circular groove is arranged side by side with the linkage groove 20h in the third direction. Adjacent two unit housings 2h are arranged side by side, so that two semi-circular grooves are butted to form a circular second limiting groove 2l. Each second limiting groove 2l is spaced opposite to the third limiting groove 33b for limiting and assembling an elastic reset member 7. In this way, each elastic reset member 7 is located between two adjacent linkage parts 200b.

[0089] As Figure 7 As shown, a limiting platform 23h is further provided inside the unit housing 2h corresponding to the linkage groove 20h. The limiting platform 23h is spaced opposite to the static contact group 22, so that the moving contact bridge 201 moves between the static contact group 22 and the limiting platform 23h. In the opening position, the limiting part 201 abuts against the limiting platform 23h, thereby restricting the moving range of the moving contact bridge 201. When the moving contact bridge 201 is repelled, the abutting cooperation between the limiting part 201 of the moving contact bridge 201 and the limiting platform 23h enables the contact support 200 to reset the elastic device 202 when moving to the opening position.

[0090] In this embodiment, each arc extinguishing system includes an arc extinguishing chamber 24, an arc ignition plate 27, and a magnetic enhancement member 23. The arc extinguishing chamber 24 and the arc ignition plate 27 can adopt existing structures. Each moving contact part 2011 corresponds to the arc inlet of the arc extinguishing chamber 24, and one end of the arc ignition plate 27 is connected to the end of the static contact part 22004. That is, one end of the arc ignition plate 27 is connected to the connecting part 22005, and the other end of the arc ignition plate 27 extends into the arc extinguishing chamber 24 along one side of the arc inlet. An exhaust hole for exhausting tail gas is provided at one end of the arc extinguishing chamber 24 away from the arc inlet.

[0091] As Figures 6 - 9As shown, the magnetic enhancing member 23 is preferably in the shape of a strip plate. The middle part of the magnetic enhancing member 23 passes through the gap between the static contact part 22004 and the first end of the static contact 220. The two ends of the magnetic enhancing member 23 are bent and extended towards the moving contact part 2011 respectively to form magnetic enhancing walls. Each moving contact part 2011 contacts or separates from the static contact part 22004 within the gap between the two magnetic enhancing walls, enhancing the magnetic field at the moving contact part 2011 and the static contact part 22004, which is beneficial to introducing the arc generated when the contact mechanism 20 is disconnected into the arc extinguishing chamber 24, and improving the arc introduction and arc extinguishing efficiency.

[0092] In this embodiment, as Figure 9 shown, each arc extinguishing system further includes a pair of arc separating plates 26. The two arc separating plates 26 are arranged opposite to each other at intervals between the two magnetic enhancing walls. One moving contact part 2011 contacts or separates from one static contact part 22004 within the interval between the pair of arc separating plates 26. In this embodiment, the pair of arc separating plates 26 and the pair of magnetic enhancing walls are spaced opposite to each other in the third direction. The arc is separated from the magnetic enhancing wall by the arc separating plate 26 to prevent the arc from contacting the magnetic enhancing wall.

[0093] In addition, in this embodiment, as Figure 7 shown, an arc extinguishing channel 21h is arranged inside the unit housing 2h. 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 extends in a curved manner, which is beneficial to buffering and cooling the exhaust gas discharged from the arc extinguishing chamber 24. Preferably, at least one metal partition 25 is further arranged inside the arc extinguishing channel 21h. The metal partition 25 is arranged at an angle with the side wall of the arc extinguishing channel 21h, which is used to change the direction of gas flow, and can also block the impurities in the exhaust gas outside the unit housing 2h. At the same time, the metal partition 25 is mainly used to filter the charged or metal particles after the arc ablation.

[0094] As Figure 7 、 8 shown, each contact unit 2 further includes a current detection device 28 and a connection circuit board 29. The current detection device 28 is connected to the contact mechanism 20. The wiring terminal of the current detection device 28 extends outside the unit housing 2h and is connected to the connection circuit board 29. The connection circuit board 29 is connected to the control circuit board of the control system.

[0095] 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 housing 2h. The wiring 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 correspondingly extends outside the unit housing 2h. The connection circuit board (which can be seen in Figure 16 ) 29 is arranged in a fitting manner on the outer surface of the unit housing 2h and is connected to the control circuit board of the control unit.

[0096] Preferably, an installation groove 2p for installing the connection circuit board 29 is formed on the outer surface of the unit housing 2h. One end of the installation groove 2p is linked with the wiring terminal, and the other end extends to one side of the adjacent electromagnetic drive mechanism 3m and communicates with the first limiting groove 22h for limiting the electromagnetic drive mechanism 3m, so that the connection circuit board 29 and the electromagnetic drive mechanism 3m are jointly connected to the control circuit board. Figure 2 In Figure 2 , two installation grooves 2p are formed on the outer surface of the unit housing 2h. The two installation grooves 2p are spaced opposite to each other in the second direction. The groove depth of each installation groove 2p is greater than or equal to the thickness of the connection circuit board 29, so that the connection circuit board 29 arranged in the installation groove 2p does not protrude from the outer surface of the unit housing 2h. In this way, the connection circuit board 29 does not penetrate and contact the unit 2 from the external wiring to interfere with the internal structure, nor does it increase the thickness of the switching device.

[0097] Combined with Figures 15 - 16 A second embodiment of the switching device is provided.

[0098] The switching device includes a housing 1. The same control system as that in the first embodiment and at least one contact unit 2 are arranged in the housing 1. An electromagnetic operating system 3 is further arranged in the housing 1. The electromagnetic operating system 3 and the contact unit 2 are arranged along the 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 in the first embodiment. Different from the first embodiment, 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 track of the electromagnetic drive mechanism 3m no longer corresponds to the upper part of the arc extinguishing system, but is collinear with the moving track of the linkage assembly 3A. In this way, to a certain extent, the height of the switching device is increased, but the overall width or thickness is not increased.

[0099] Further, the linkage assembly 3A can be simplified to only include a linkage member 3b. The electromagnetic drive mechanism 3m and the linkage member 3b are arranged along the first direction, and one or more contact units 2 are driven by the linkage member 3b. Of course, the linkage assembly 3A can also include a linkage rod (not shown), but the central axis of the linkage rod is parallel to the first direction, and both ends of the linkage rod are respectively connected with the electromagnetic drive mechanism 3m and the linkage member 3b. Of course, the linkage assembly 3A can also only include a linkage rod, but the linkage rod arranged along the first direction can only drive one contact unit 2. At this time, a driving hole along the first direction needs to be formed on the linkage part 200b for connecting with the linkage rod.

[0100] Specifically, as Figure 16As shown, the linkage member 3b is integrally in a plate-shaped structure. A first linkage hole 300b is formed in the middle of the linkage member 3b. 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. At least one second linkage hole 320b is formed in each side wall. 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. The transmission rod 3c correspondingly cooperates with the second linkage hole 320b, so as to realize the opening and closing of the contact mechanism 20 driven by the electromagnetic driving mechanism 3m. The space between the pair of side walls can serve as an avoidance groove 31b of the linkage member 3b. The avoidance groove 31b corresponds to the linkage portion 200b of a contact support 200. Or, when there are two or more contact units 2, the avoidance groove 31b can accommodate the linkage portions 200b of one or two contact units 2 at the same time. Preferably, the avoidance groove 31b correspondingly accommodates the linkage portions 200b of one or two contact units 2 located in the middle position, so as to facilitate the formation of a symmetric structure and ensure that the contact mechanisms 20 of multiple contact units 2 receive balanced driving forces.

[0101] In addition, in the embodiment, the electromagnetic operating system 3 may no longer be provided with the elastic reset member 7.

[0102] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0103] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope 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 apart along a second direction (X), a contact mechanism (20) is provided between the two terminal blocks (t), the linkage assembly (3A) is linked between the electromagnetic driving machine (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 it 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 in the second direction (X), the two electromagnetic driving mechanisms (3m) are spaced apart, 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. In the third direction (Z), adjacent two 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 switching device according to claim 4, wherein: The contact mechanism (20) includes a moving contact assembly (21) and a static contact group (22) spaced opposite to each other in the first direction (Y). A linkage portion (200b) is provided on a side of the moving contact assembly (21) facing away from the static contact group (22). 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). Adjacent two 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, characterized in that: The moving contact assembly (21) includes a contact support (200), a moving contact bridge (201) and an elastic device (202). The linkage part (200b) is arranged on the 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) arranged on the moving contact bridge (201) are arranged in the assembly cavity. The first end and the 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 arranged in the unit housing (2h). The limiting platform (23h) is spaced opposite to the stationary contact group (22). The moving contact bridge (201) moves between the limiting platform (23h) and the stationary contact (220).

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

9. The switching device according to claim 8, wherein: The first end of the stationary contact (220) is spaced opposite to the moving contact assembly (21). The end of the first end is bent back and extended to form a stationary contact part (22004). The stationary contact part (22004) is spaced opposite to a moving contact part (2011) of the moving contact assembly (21). A magnetic enhancement part (23) is arranged in the gap between the stationary contact part (22004) and the first end. The second end of the stationary contact (220) is connected to the 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 stationary contact (220), and the connection terminal of the current detection device (28) extends outside the unit housing (2h).

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