switching device

Abstract

A switching device includes a housing, an electromagnetic operating system, and at least two contact units. Each contact unit includes a unit housing and a contact mechanism. The contact mechanism includes a moving contact assembly and a stationary contact assembly spaced apart and opposite each other in a first direction. The moving contact assembly includes a contact support and a moving contact bridge. The side of the contact support opposite to the moving contact bridge has a protruding linkage portion extending beyond the unit housing. A transmission rod connects two adjacent linkage portions. The electromagnetic operating system and the contact units are arranged along the first direction and are driven and cooperate with the transmission rod. In this invention, the electromagnetic operating system and contact units are arranged along the first direction, avoiding side-by-side arrangement which increases the overall thickness. The linkage portions extending beyond the unit housing are respectively linked and connected to the electromagnetic operating system and adjacent moving contact assemblies. Linkage from outside the contact units avoids affecting the internal components. The electromagnetic operating system is driven and connected to the transmission rod connected between the two linkage portions, ensuring the consistency of the operation of multiple moving contact assemblies.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a switching device. Background Technology

[0002] A switching device is a device for controlling the opening and closing 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 open and close the circuit.

[0003] In existing products, the electromagnetic operating system is usually arranged side by side or parallel to the contact unit. That is, the electromagnetic operating system is arranged in the same space as a contact unit, or it is arranged as a separate accessory module. This structure has the following drawbacks: First, arranging the contact unit and the electromagnetic operating system side by side will inevitably increase the overall thickness or width of the switching device; Second, when there are many contact units, it is not conducive to ensuring the synchronization of the operation of multiple contact units; Third, among multiple contact units, at least one moving contact assembly needs to be linked with the electromagnetic operating system and the adjacent moving contact assembly at the same time. Its linkage position is located in the middle of the contact unit, which can easily affect the internal components. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one defect of the prior art and provide a switch device with a simple structure and high reliability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a switching device, including a housing, an electromagnetic operating system and at least two contact units disposed within the housing, each contact unit including a unit housing and a contact mechanism disposed within the unit housing, the contact mechanism including a moving contact assembly and a stationary contact assembly spaced apart from each other in a first direction, each moving contact assembly including a contact support and a moving contact bridge connected to the contact support, the side of the contact support opposite to the moving contact bridge having a protruding linkage portion, the linkage portion extending out of the unit housing, a transmission rod connecting two adjacent linkage portions, the electromagnetic operating system and the contact units being arranged along the first direction and drivingly cooperating with the transmission rod.

[0007] Preferably, the electromagnetic operating system includes an electromagnetic drive mechanism and a linkage component. The electromagnetic drive mechanism drives the moving contact assembly to move along a first direction through the linkage component. The stationary contact group includes two stationary contacts spaced apart and opposite each other in a second direction. Two adjacent contact units are arranged side by side in a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0008] Preferably, the electromagnetic drive mechanism, the linkage component, and the contact mechanism are arranged sequentially along the first direction.

[0009] Preferably, the electromagnetic drive mechanism and the linkage component are arranged side by side in the second direction, and the linkage component and the contact mechanism are arranged along the first direction.

[0010] Preferably, the electromagnetic operating system includes two electromagnetic drive mechanisms spaced apart in a second direction, and a linkage component is linked between the two electromagnetic drive mechanisms.

[0011] Preferably, the linkage assembly includes a linkage rod and a linkage component. The two ends of the linkage rod are respectively linked to two electromagnetic drive mechanisms, and the linkage component is connected to the linkage rod and drives and cooperates with at least one linkage part.

[0012] Preferably, the linkage component has at least one second linkage hole, through which the transmission rod passes.

[0013] Preferably, the linkage component has at least one clearance groove for avoiding the linkage part.

[0014] Preferably, the electromagnetic operating system further includes an elastic reset component, which is disposed between two adjacent linkage parts. The elastic reset component cooperates with the linkage assembly to drive the electromagnetic operating system to reset.

[0015] Preferably, each of the elastic reset elements is disposed between two adjacent contact units.

[0016] Preferably, the unit housing has a linkage groove on the side wall facing the electromagnetic operating mechanism, the linkage part slides out of the unit housing from the linkage groove, and a second limiting groove for assembling the elastic reset part is provided between two adjacent linkage grooves.

[0017] Preferably, it includes three or more contact units, and the electromagnetic drive mechanism is driven to connect with one or two linkages located in the middle position.

[0018] In this invention, the switching device has an electromagnetic operating system and a contact unit arranged along a first direction to avoid increasing the overall thickness by arranging them side by side. The linkage part supporting the contact protrudes out of the unit housing and is linked to the electromagnetic operating system and the adjacent moving contact assembly respectively. Linkage from the outside of the contact unit can avoid affecting the inside. The electromagnetic operating system is driven by a transmission rod connected between the two linkage parts, which can drive all moving contact assemblies synchronously, ensuring the consistency of the operation of multiple moving contact assemblies.

[0019] Furthermore, the electromagnetic drive mechanism and linkage components can be arranged along the first direction or side by side in the second direction, offering diverse layout options to meet the needs of different switching devices.

[0020] In particular, the two electromagnetic drive mechanisms and linkage components are arranged along the second direction, and the two electromagnetic drive 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 operating system driving multiple contact mechanisms.

[0021] In addition, the elastic reset component is located between two adjacent linkage parts, which can simultaneously reset the electromagnetic drive mechanism and the linkage component, making full use of the space inside the housing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the switching device of this utility model after the outer casing has been removed;

[0023] Figure 2 This is a schematic diagram of the electromagnetic drive mechanism and linkage components in this utility model;

[0024] Figure 3 This is a schematic diagram of the electromagnetic operating system and contact unit in this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the disassembled electromagnetic operating system and contact unit in this utility model;

[0026] Figure 5 This is a front view of the internal structure of the contact unit in this utility model;

[0027] Figure 6 This is a schematic diagram of the contact mechanism in this utility model;

[0028] Figure 7 This is a schematic diagram of the moving contact assembly in this utility model;

[0029] Figure 8 This is a schematic diagram of the switching device in this utility model. Figure 1 (Contains only one electromagnetic drive mechanism);

[0030] Figure 9 This is a schematic diagram of the switching device in this utility model. Figure 2 (Contains only one electromagnetic drive mechanism);

[0031] Figure 10 yes Figure 8 , Figure 9 A schematic diagram of the linkage component and the contact unit;

[0032] Figure label:

[0033] 1b-Base, t-Terminal block, 2-Contact unit, 2h-Unit housing, 21h-Arc extinguishing channel, 22h-First limiting groove, 23h-Limiting platform, 2p-Mounting groove, 2g-Magnetic yoke mounting 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-Best wall of bearing part, 2002c-Bottom wall of bearing part, 2003c-Front wall of bearing part, 2004c-Rear wall of bearing part, 201-Moving contact bridge, 2011-Moving contact part, 2012-Moving contact point, 201- Limiting part, 22-stationary contact group, 220-stationary contact, 2200-stationary contact plate, 2201-stationary contact point, 23-magnetizing component, 24-arc extinguishing chamber, 25-metal partition, 26-arc blocking plate, 27-arc ignition plate, 28-current detection device, 29-connecting circuit board, 3-electromagnetic operating system, 3m-electromagnetic drive mechanism, 31-moving iron core, 32-coil assembly, 33-stationary iron core, 3c-transmission rod, 3b-linkage component, 30b-linkage component 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 component. Detailed Implementation

[0034] The specific embodiments of the switching device of this utility model are further described below with reference to the accompanying drawings. The switching device of this utility model is not limited to the description of the following embodiments.

[0035] like Figure 1 , 2 As shown in Figures 8 and 9, the switching device includes a housing, within which a control system, an electromagnetic operating system 3, and at least one contact unit 2 are disposed. The control system outputs control signals to drive the electromagnetic operating system 3 to operate. The electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage component. Each contact unit 2 includes a unit housing 2h and a contact mechanism 20 disposed within the unit housing 2h. The contact mechanism 20 includes a moving contact assembly 21 and a stationary contact group 22 that cooperate with each other. The moving contact assembly 21 includes a contact support 200 and a moving contact bridge 201 connected to the contact support 200. The stationary contact group 22 includes two stationary contacts 220 that are spaced apart. The two moving contact portions 2011 of the moving contact bridge 201 are spaced apart from the two stationary contacts 220 respectively. The moving contact assemblies 21 of two adjacent contact units 2 are linked together. The electromagnetic drive mechanism 3m is drivenly connected to the moving contact assembly 21 of at least one contact unit 2.

[0036] For ease of description, the direction of movement of the moving contact assembly 21 is taken as the first direction. Figure 1In this context, with the Y-axis as the first direction, the moving contact assembly 21 is spaced apart from the stationary contact assembly 22 in the first direction. The two directions perpendicular to the first direction are designated as the second and third directions. Figure 1 In the middle, the X-axis and Z-axis are located in the second direction and the third direction, respectively. Two stationary contacts 220 are spaced apart in the second direction, and two adjacent contact units 2 are arranged side by side in the third direction.

[0037] like Figure 5-7 As shown, the improvement of this application is that the contact support 200 has a protruding linkage part 200b on the side opposite to the moving contact bridge 201. The linkage part 200b extends out of the unit housing 2h. A transmission rod 3c is connected between two adjacent linkage parts 200b. The electromagnetic operating system 3 and the contact unit 2 are arranged along the first direction and drive and cooperate with the transmission rod 3c.

[0038] Thus, the electromagnetic operating system 3 and the contact unit 2 are arranged along the first direction to avoid increasing the overall thickness by arranging them side by side. The linkage part 200b of the contact support 200 protrudes and extends out of the unit housing 2h and is linked to the electromagnetic operating system 3 and the adjacent moving contact assembly 21 respectively. Linking from the outside of the contact unit 2 can avoid affecting the inside. The electromagnetic operating system 3 is driven by the transmission rod 3c connected between the two linkage parts 200b, which can drive all moving contact assemblies 21 synchronously, ensuring the consistency of the operation of multiple moving contact assemblies 21.

[0039] Specifically, the electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage component. The electromagnetic drive mechanism 3m drives the moving contact component 21 to move along a first direction via a moving component. The electromagnetic drive mechanism 3m, the linkage component, and the contact mechanism 20 can be arranged sequentially along the first direction (see [reference]). Figure 8-10 This structure will increase the overall height to some extent.

[0040] Of course, the electromagnetic drive mechanism 3m and the linkage component can also be arranged side by side in the second direction (e.g. Figure 1-3 As shown, the linkage component and the moving contact component 21 are arranged along the first direction. This structure can minimize the overall height without increasing the overall width and thickness. Furthermore, the electromagnetic operating system 3 includes two electromagnetic drive mechanisms 3m spaced apart in the second direction. The linkage component is located between the two electromagnetic drive mechanisms 3m and is simultaneously linked to the two electromagnetic drive mechanisms 3m in the second direction. The two electromagnetic drive mechanisms 3m jointly drive the contact mechanism 20, providing a stable driving force for the opening and closing of the contact mechanism 20 and improving the stability of the electromagnetic operating system 3 in driving multiple contact mechanisms 20.

[0041] Combination Figure 1-7A first embodiment of a switching device is provided.

[0042] like Figure 1-4 As shown, the switching device includes a housing, with opposite ends of the housing serving as terminals. Each terminal has at least one wiring groove, and each wiring groove has an operating hole and a wiring hole for easy wiring. The connecting line between the two terminals is parallel to the second direction. The side of the housing located between the two terminals serves as the operating end. Preferably, the operating end protrudes from the middle of the housing, making the housing as a whole convex shape. Preferably, the housing includes a top cover and a base 1b that overlap each other. The top cover overlaps the base 1b in the first direction, and the operating end corresponds to the middle position of the top cover.

[0043] The housing contains a control system, an electromagnetic operating system 3, and at least one contact unit 2. The control system includes a control circuit board, and the electromagnetic operating system 3 is connected to the control circuit board. The electromagnetic operating system 3 moves in a 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, there are multiple contact units 2, and two adjacent contact units 2 are arranged side by side in a 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.

[0044] like Figure 1-4 As shown, the electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage component. Each contact unit 2 includes a pair of terminals t spaced apart along a second direction. A contact mechanism 20 is connected between the pair of terminals t. The contact mechanism 20 includes a moving contact assembly 21 and a stationary contact group 22 spaced apart and opposite each other in a first direction. The electromagnetic drive mechanism 3m is linked to at least one moving contact assembly 21 of the contact unit 2 through the linkage component. The moving contact assemblies 21 of two adjacent contact units 2 are linked together. That is, a transmission rod 3c is connected between two adjacent moving contact assemblies 21. The electromagnetic operating system 3 can drive one of the moving contact assemblies 21 through the linkage component. The remaining moving contact assemblies 21 move synchronously under the linkage action of the transmission rod 3c. Preferably, the linkage component is linked to the transmission rod 3c, so that the electromagnetic operating system 3 drives all moving contact assemblies 21 synchronously, ensuring consistent operation.

[0045] Combination Figure 1-4A specific structure of an electromagnetic operating system 3 is provided. The electromagnetic operating system 3 includes an electromagnetic drive mechanism 3m and a linkage component. The linkage component and the moving contact component 21 are arranged sequentially along a first direction. The electromagnetic drive mechanism 3m moves along the first direction and is arranged side by side with the linkage component in a second direction. The electromagnetic drive mechanism 3m is connected to the moving contact component 21 of at least one contact unit 2 through the linkage component. In this embodiment, the electromagnetic drive mechanism 3m synchronously drives all moving contact components 21 to move along the first direction through the linkage component. Preferably, the electromagnetic drive mechanism 3m corresponds to the area 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 area above the arc extinguishing system. That is, in the first direction, the movement trajectory of the electromagnetic drive mechanism 3m is not on the same straight line as the movement trajectory of the linkage component, which is beneficial to reducing its height.

[0046] Furthermore, such as Figure 3 , 4 As shown, the electromagnetic operating system 3 also includes an elastic reset member 7. The elastic reset member 7 cooperates with the linkage component to reset the electromagnetic drive mechanism 3m and the linkage component. Preferably, in the second direction, the elastic reset member 7 is disposed between the two electromagnetic drive mechanisms 3m, and in the third direction, the elastic reset member 7 is disposed on the unit housing 2h between the two contact units 2. Two adjacent contact units 2 share one elastic reset member 7, which helps to reduce costs.

[0047] In this embodiment, the electromagnetic drive mechanism 3m includes a magnetic yoke, a coil assembly 32, and a moving component. 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. The moving component includes a moving iron core 31 and a stationary iron core 33. The stationary iron core 33 and the moving iron core 31 are respectively arranged at opposite ends of the coil frame. Each coil frame is arranged inside the housing along a first direction. The moving iron core 31 is driven by the coil assembly 32 to move along the first direction according to the control signal. The two coil frames are spaced apart in a second direction. The two moving iron cores 31 are spaced apart in the second direction and are linked together by a linkage component. Of course, the electromagnetic drive mechanism 3m can also adopt existing technology.

[0048] like Figure 1-4As shown, the linkage assembly includes a linkage rod 3r and a linkage component 3b. Each linkage rod 3r is connected to two moving iron cores 31 at both ends, meaning that the central axis of each linkage rod 3r is parallel to the second direction. The linkage component 3b is located 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. Two adjacent linkage rods 3r are arranged side by side in the third direction, which helps to ensure the stable linkage of the two electromagnetic drive mechanisms 3m. In the third direction, the preferred linkage component 3b is driven to connect with the contact mechanism 20 of one or two contact units 2 located in the middle position, which helps to ensure the synchronicity of the opening and closing actions of all contact mechanisms 20.

[0049] like Figure 4 As shown, the linkage 3b includes a block-shaped linkage body 30b. An opening groove, serving as a clearance groove 31b, is provided in the middle of one side of the linkage body 30b. The opening of the clearance groove 31b is opposite to the contact mechanism 20 of the contact unit 2, which helps to reduce the space occupied by the linkage 3b in the first direction (height direction). A first linkage hole 300b is provided on the other side of the linkage body 30b for the linkage 3b to pass through. In the figure, the clearance groove 31b and the first linkage hole 300b are arranged along the centerline of the linkage 3b, so that the linkage 3b has a symmetrical structure.

[0050] Of course, the linkage assembly may also consist of only the linkage rod 3r, with both ends of the linkage rod 3r being linked to two electromagnetic drive mechanisms 3m respectively, and the middle part of the linkage rod 3r being connected to at least one moving contact assembly 21. Alternatively, the middle part of the linkage rod 3r may be connected to the transmission rod 3c connected between the two moving contact assemblies 21, which can also drive all contact mechanisms 20.

[0051] exist Figure 4 In this embodiment, at least one second linkage hole 320b is provided at both ends of the linkage member 3b. The central axis of the second linkage hole 320b passes through both sides of the opening of the clearance 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 a first direction, and the central axis of the second linkage hole 320b is parallel to a 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, thereby enabling the linkage member 3b to drive the contact mechanism 20. Figure 4In the figure, the two ends of the linkage 3b extend outward along the opening direction away from the clearance groove 31b, so that the two ends of the clearance groove 31b opening form linkage bridge arms 32b. Each second linkage hole 320b is correspondingly opened on the linkage bridge arm 32b. The linkage bridge arm 32b facing the contact unit 2 has a third limiting groove 33b. One end of the elastic reset member 7 elastically abuts against the third limiting groove 33b. In the figure, the elastic reset member 7 is a spring 2021 with one end set along the first direction. One end of the spring 2021 cooperates with the third limiting groove 33b, and the other end is limited to the contact unit 2.

[0052] As another structure of the electromagnetic operating system 3 (not shown), the electromagnetic operating system 3 may also include only one electromagnetic drive mechanism 3m. The electromagnetic drive mechanism 3m and the linkage component are still arranged side by side in the second direction. In this case, the linkage component 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 switching devices with fewer contact units 2.

[0053] Combination Figure 3-6 A specific structure for contact unit 2 is provided.

[0054] The contact unit 2 includes a pair of terminals t, a contact mechanism 20, and two arc-extinguishing systems. The pair of terminals t are spaced apart in the second direction. The contact mechanism 20 is connected between the pair of terminals t to control the connection and disconnection of the main circuit of each contact unit 2. Each arc-extinguishing system is disposed between the contact mechanism 20 and a terminal 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 port for discharging exhaust gas. The terminals t and the arc-extinguishing chamber 24 can adopt existing technologies.

[0055] like Figure 5 , 6As shown, the contact mechanism 20 includes a moving contact assembly 21 and a stationary contact group 22 spaced apart in a first direction. The stationary contact group 22 includes two stationary contacts 220. In a second direction, the two stationary contacts 220 are spaced apart between two terminals t. Each stationary contact 220 has a stationary contact portion at its first end. The middle portion of the stationary contact 220 extends along the side adjacent to the arc-extinguishing chamber 24, so that the second end of the stationary contact 220 is connected to a terminal t. The moving contact assembly 21 includes a contact support 200 and a moving contact bridge 201 connected to the contact support 200. The side of the contact support 200 facing away from the moving contact bridge 201 has a protruding linkage portion 200b. Two adjacent linkage portions 200b are linked together by a transmission rod 3c. The two ends of the moving contact bridge 201 are respectively used as moving contact portions 2011. Each moving contact portion 2011 is in contact or separated from a corresponding stationary contact portion at the arc inlet of the arc-extinguishing chamber 24.

[0056] Preferably, one end of the contact support 200 serves as a linkage part 200b, and at least one connection hole 2010b is provided on the linkage part 200b. A transmission rod 3c passes through each connection hole 2010b to link two adjacent linkage parts 200b together. The other end of the contact support 200 is provided with an assembly cavity, and a moving contact bridge 201 is disposed through the assembly cavity, and two moving contact parts 2011 extend to the outside of the assembly cavity respectively.

[0057] like Figure 3-7 As shown, the contact support 200 includes an integrally formed linkage part 200b and a support part 200c. One end of the linkage part 200b has two parallel connecting holes 2010b. The other end of the linkage part 200b is connected to one end of the support part 200c. Preferably, the support part 200c is a T-shaped hollow body. After the linkage part 200b and the support part 200c are connected, the contact support 200 as a whole forms a cross shape. The top wall 2001c of the support part is respectively connected to both sides of the other end of the linkage part 200b, and the support part 200c is located away from the linkage part. One end wall of part 200b serves as the bottom wall 2002c of the support part. Two pairs of side walls are connected between the bottom wall 2002c and the top wall 2001c of the support part. One pair of side walls are the front wall 2003c and the rear wall 2004c of the support part, and the other pair of side walls are the left wall and the right wall of the support part. The hollow area inside the support part 200c serves as the assembly cavity. The left and right walls of the support part are open as mounting ports that connect to the assembly cavity. Both ends of the moving contact bridge 201 extend from the mounting ports to the outside of the contact support 200.

[0058] The moving contact bridge 201 can adopt existing technologies, such as Figure 5-7As shown, the moving contact bridge 201 is generally in the shape of a straight plate. The middle part of the moving contact bridge 201 is disposed in the assembly cavity. The two ends of the moving contact bridge 201 are respectively moving contact parts 2011, which extend out of the assembly cavity from the two mounting ports. Each moving contact part 2011 has a moving contact point 2012 on the side facing the stationary contact 220. The end of each moving contact part 2011 is bent in the direction away from the stationary contact 220 to form a limiting part 201. When the moving contact assembly 21 is in the open position, the limiting part 201 can cooperate with the limiting platform 23h in the switch device to limit the movement range of the moving contact bridge 201.

[0059] The stationary contact 220 can be made using existing technologies, such as... Figure 5 , 6 As shown, the first end of the stationary contact 220 is spaced apart from the moving contact assembly 21. The end of the first end is folded back and extended to form a stationary contact portion. The stationary contact portion is spaced apart from the moving contact assembly 21. A stationary contact point 2201 is provided on the side of the stationary contact portion facing the moving contact assembly 21. A gap is left between the stationary contact portion facing away from the stationary contact point 2201 and the first end of the stationary contact 220. The middle part of the stationary contact 220 extends along one side of the arc-extinguishing chamber 24, so that the second end of the stationary contact 220 is connected to a terminal t.

[0060] like Figure 1-5 As shown, in this embodiment, each contact unit 2 further includes a unit housing 2h, a contact mechanism 20, an arc-extinguishing system, and a terminal t, all housed within the unit housing 2h, facilitating the formation of a modular structure. Preferably, the contact mechanism 20 is housed within the unit housing 2h, and the terminal t is located outside both ends of the unit housing 2h and correspondingly within the wiring grooves of the outer casing. A through-hole is provided on the unit housing 2h at the position corresponding to the terminal t, and the second end of the stationary contact 220 passes through the through-hole and connects to the terminal t. The arc-extinguishing system is correspondingly located within the unit housing 2h between the contact mechanism 20 and one terminal t. Unit exhaust ports 2e communicating with the arc-extinguishing system are respectively provided at both ends of the unit housing 2h (see [reference]). Figure 3 This design facilitates the discharge of exhaust gases. The unit's exhaust port 2e corresponds to the wiring slot on the outer casing, which not only allows for the discharge of exhaust gases but also reduces the need for openings on the outer casing.

[0061] A linkage groove is provided in the middle of the unit housing 2h. The central axis of the linkage groove is parallel to the first direction. The moving contact assembly 21 is linked to the linkage assembly through the linkage groove. The linkage part 200b slides through the linkage groove and protrudes out of the unit housing 2h. It is used to link with the electromagnetic operating system 3 and the adjacent moving contact assembly 21 respectively. Linking from the outside of the contact unit 2 can avoid affecting the inside. The electromagnetic operating system 3 is driven by the transmission rod 3c connected between the two linkage parts 200b. It can drive all moving contact assemblies 21 synchronously and ensure the consistency of the operation of multiple moving contact assemblies 21.

[0062] like Figure 5 As shown, a first limiting groove 22h is provided on both sides of the linkage groove. Each first limiting groove 22h corresponds to the top of the arc extinguishing system in the first direction, and the bottom of the first limiting groove 22h is recessed into the unit housing 2h. This allows each electromagnetic drive mechanism 3m to be assembled in one first limiting groove 22h, reducing the height of its protrusion from the unit housing 2h in the first direction. This ensures assembly stability and 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 into the unit housing 2h to form a stepped surface. The lower part of the middle part is used to limit the electromagnetic drive mechanism. In the coil assembly 32 in the structure 3m, the higher region surrounding the lower central region serves as the magnetic yoke mounting groove 2g, and the magnetic yoke disposed on the outside of the coil assembly 32 is correspondingly confined therein; at least on one side of the linkage groove, the unit housing 2h has a semi-circular groove, the semi-circular groove and the linkage groove are arranged side by side in the third direction, and two adjacent unit housings 2h are arranged side by side, so that the two semi-circular grooves are joined to form a circular second limiting groove 2l. Each second limiting groove 2l and the third limiting groove 33b are spaced apart and opposite to each other for limiting the assembly of an elastic reset member 7. Thus, each elastic reset member 7 is located between two adjacent linkage parts 200b.

[0063] Inside the unit housing 2h corresponding to the linkage slot, a limiting platform 23h is also provided. The limiting platform 23h is spaced apart from the stationary contact group 22, so that the moving contact bridge 201 can move between the stationary contact group 22 and the limiting platform 23h. When the circuit is open, the limiting part 201 abuts against the limiting platform 23h, thereby limiting the movement range of the moving contact bridge 201. When the moving contact bridge 201 is pushed away, the abutting cooperation between the limiting part 201 of the moving contact bridge 201 and the limiting platform 23h allows the contact support 200 to reset the elastic device 202 when it moves to the open position.

[0064] In this embodiment, each arc extinguishing system includes an arc extinguishing chamber 24, an arc-starting plate 27, and a magnetizing component 23. The arc extinguishing chamber 24 and the arc-starting plate 27 can adopt existing structures. Each moving contact portion 2011 and the stationary contact portion correspond to the arc inlet of the arc extinguishing chamber 24. One end of the arc-starting plate 27 is connected to the end of the stationary contact portion. That is, one end of the arc-starting plate 27 is connected to the connecting portion 22005. The other end of the arc-starting plate 27 extends along one side of the arc inlet into the arc extinguishing chamber 24. The end of the arc extinguishing chamber 24 away from the arc inlet is provided with an exhaust port for discharging exhaust gas.

[0065] The magnetizing element 23 is disposed on both sides of the stationary contact portion and the moving contact portion 2011, enhancing the magnetic field at both the moving and stationary contact portions. This facilitates the introduction of the electric arc generated when the contact mechanism 20 breaks into the arc-extinguishing chamber 24, improving the efficiency of arc ignition and extinguishing. An arc-blocking plate 26 is disposed between the magnetizing element 23 and the contact mechanism 20. The arc-blocking plate 26 separates the electric arc from the magnetizing wall, preventing the electric arc from contacting the magnetizing element 23.

[0066] In addition, in this embodiment, an arc-extinguishing channel 21h is provided inside the unit housing 2h, and the arc-extinguishing channel 21h is connected between the unit exhaust port 2e and the exhaust hole. Figure 5 In the middle, the arc extinguishing channel 21h is curved 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 5 is set at an angle with the side wall of the arc extinguishing channel 21h to change the direction of gas flow and to block impurities in the exhaust gas from the exhaust unit housing 2h.

[0067] Each contact unit 2 also includes a current detection device 28 and a connection circuit board 29 (see Figure 9 The current detection device 28 is connected to the contact mechanism 20. The wiring terminal of the current detection device 28 extends to the outside of 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.

[0068] In this embodiment, the current detection device 28 is connected to the middle of a stationary contact 220. Figure 5 In the middle, the stationary 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 stationary contact 220 facing away from the arc-extinguishing chamber 24 and extends out of the unit housing 2h. The connecting circuit board 29 is arranged to fit against the outer surface of the unit housing 2h and is connected to the control circuit board of the control unit.

[0069] Preferred, such as Figure 1 As shown, a mounting slot 2p for mounting the connection circuit board 29 is provided on the outer surface of the unit housing 2h. One end of the mounting slot 2p is linked to the terminal block, and the other end extends to the side of the adjacent electromagnetic drive mechanism 3m and communicates with the first limiting slot 22h used to limit the electromagnetic drive mechanism 3m, so that the connection circuit board 29 and the electromagnetic drive mechanism 3m are connected to the control circuit board together. Figure 1In the middle, two mounting slots 2p are opened on the outer surface of the unit housing 2h. The two mounting slots 2p are spaced apart and opposite each other in the second direction. The depth of each mounting slot 2p is greater than or equal to the thickness of the connecting circuit board 29, so that the connecting circuit board 29 set in the mounting slot 2p will not protrude from the outer surface of the unit housing 2h. In this way, the connecting circuit board 29 will not penetrate the contact unit 2 to interfere with the internal structure, nor will it increase the thickness of the switching device.

[0070] Combination Figure 8-10 A second embodiment of the switching device is provided.

[0071] The switching device includes a housing, within which is a control system identical to that in the first embodiment and at least one contact unit 2. An electromagnetic operating system 3 is also provided within the housing. 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 component. The structure of the electromagnetic drive mechanism 3m can be the same as in the first embodiment. However, unlike the first embodiment, the electromagnetic drive mechanism 3m, the linkage component, and the contact mechanism 20 are arranged sequentially along the first direction. That is, in the first direction, the movement trajectory of the electromagnetic drive mechanism 3m no longer corresponds to the top of the arc-extinguishing system, but is collinear with the movement trajectory of the linkage component. This increases the height of the switching device to a certain extent, but does not increase the overall width or thickness.

[0072] Furthermore, such as Figure 10 As shown, the linkage assembly can be simplified to include only the linkage member 3b. The electromagnetic drive mechanism 3m and the linkage member 3b are arranged along the first direction. The linkage member 3b drives one or more contact units 2. Of course, the linkage assembly 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 connected to the electromagnetic drive mechanism 3m and the linkage member 3b respectively. Of course, the linkage assembly can also include only the linkage rod, but the linkage rod arranged along the first direction can only drive one contact unit 2. In this case, a drive hole along the first direction needs to be opened on the linkage part 200b for connection with the linkage rod.

[0073] Specifically, such as Figure 10As shown, the linkage component 3b has a plate-like structure. A first linkage hole 300b is provided in the middle of the linkage component 3b. The central axis of the first linkage hole 300b is parallel to the first direction. The opposite ends of the linkage component 3b are bent and extended in the same direction to form a pair of spaced-apart sidewalls. At least one second linkage hole 320b is provided on each sidewall. The central axis of the second linkage hole 320b is parallel to the third direction. At least one linkage part 200b of the contact unit 2 is provided with a transmission rod 3c. The transmission rod 3c is correspondingly engaged with the second linkage hole 320b, thereby realizing the electromagnetic drive mechanism 3 m drives the contact mechanism 20 to open and close the circuit; the gap between a pair of side walls can serve as a clearance groove 31b for the linkage 3b, which corresponds to the linkage part 200b of a contact support 200. Alternatively, when there are two or more contact units 2, the clearance groove 31b can simultaneously accommodate the linkage parts 200b of one or two contact units 2. Preferably, the clearance groove 31b corresponds to the linkage parts 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 a balanced driving force.

[0074] In addition, in this embodiment, the electromagnetic operating system 3 may not need to be equipped with the elastic reset member 7.

[0075] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0076] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A switching device, comprising a housing, wherein an electromagnetic operating system (3) and at least two contact units (2) are disposed within the housing, each contact unit (2) comprising a unit housing (2h) and a contact mechanism (20) disposed within the unit housing (2h), the contact mechanism (20) comprising a moving contact assembly (21) and a stationary contact assembly (22) spaced apart from each other in a first direction, each moving contact assembly (21) comprising a contact support (200) and a moving contact bridge (201) connected to the contact support (200), characterized in that: The contact support (200) has a protruding linkage part (200b) on the side opposite to the moving contact bridge (201). The linkage part (200b) extends out of the unit housing (2h). A transmission rod (3c) is connected between two adjacent linkage parts (200b). The electromagnetic operating system (3) and the contact unit (2) are arranged along the first direction and drive and cooperate with the transmission rod (3c).

2. The switching device of claim 1, wherein: The electromagnetic operating system (3) includes an electromagnetic drive mechanism (3m) and a linkage component. The electromagnetic drive mechanism (3m) drives the moving contact assembly (21) to move along the first direction through the linkage component. The stationary contact group (22) includes two stationary contacts (220) spaced apart and opposite each other in the second direction. Two adjacent contact units (2) are arranged side by side in the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

3. The switching device of claim 2, wherein: The electromagnetic drive mechanism (3m), linkage component and contact mechanism (20) are arranged sequentially along the first direction.

4. The switching device of claim 2, wherein: The electromagnetic drive mechanism (3m) and the linkage component are arranged side by side in the second direction, and the linkage component and the contact mechanism (20) are arranged along the first direction.

5. The switching device of claim 4, wherein: The electromagnetic operating system (3) includes two electromagnetic drive mechanisms (3m) spaced apart in the second direction, and a linkage component is linked between the two electromagnetic drive mechanisms (3m).

6. A switching device according to claim 4 or 5, characterised in that: The linkage assembly includes a linkage rod (3r) and a linkage component (3b). The two ends of the linkage rod (3r) are respectively linked to two electromagnetic drive mechanisms (3m). The linkage component (3b) is connected to the linkage rod (3r) and drives and cooperates with at least one linkage part (200b).

7. The switching device according to claim 6, characterized in that: The linkage component (3b) has at least one second linkage hole (320b), and the transmission rod (3c) passes through the second linkage hole (320b).

8. The switching device of claim 6, wherein: The linkage (3b) has at least one clearance groove (31b) for avoiding the linkage part (200b).

9. The switching device of claim 2, wherein: The electromagnetic operating system (3) also includes an elastic reset component (7), which is disposed between two adjacent linkage parts (200b). The elastic reset component (7) cooperates with the linkage component to drive the electromagnetic operating system (3) to reset.

10. The switching device of claim 9, wherein: Each of the elastic reset elements (7) is disposed between two adjacent contact units (2).

11. The switching device of claim 9, wherein: The unit housing (2h) has a linkage groove on the side wall facing the electromagnetic operating mechanism. The linkage part (200b) slides out of the unit housing (2h) from the linkage groove. A second limiting groove (2l) for assembling the elastic reset part (7) is provided between two adjacent linkage grooves.

12. The switching device of claim 2, wherein: It includes three or more contact units (2), and the electromagnetic drive mechanism (3m) is driven to be connected to one or two linkage parts (200b) located in the middle position.

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