switching device

Abstract

A switching device includes a housing, within which at least one contact unit and an electromagnetic operating system for driving the contact unit are disposed. The contact unit includes a contact mechanism comprising a moving contact assembly and a stationary contact that cooperate with each other. The electromagnetic operating system includes a coil assembly and a moving assembly. The moving assembly is drivenly connected to the moving contact assembly. The moving assembly is also connected to an operating element extending outside the housing. The moving assembly is driven by the coil assembly or the operating element to move between a first position and a second position, thereby causing the moving contact assembly to move closer to or further away from the stationary contact. In this invention, the moving assembly of the electromagnetic operating system is connected to an operating element, allowing the moving assembly to be operated manually or driven by the coil assembly, thus improving the operational reliability of the switching device.

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 switch is a device that controls the on / off state of a circuit. With the increasing application and demand for intelligent switches, most existing intelligent switches use a combination of motors and gear sets for remote control, which has the following drawbacks: First, the control scheme is complex, costly, and occupies a large space, failing to meet the miniaturization requirements of the switch. Second, the existing electric operating mechanism cannot be manually driven. When the electric operating mechanism is powered off or in some emergency situations, the switch cannot be manually driven, reducing the operational reliability of the switch. Summary of the Invention

[0003] The purpose of this invention is to overcome at least one defect of the prior art and provide a switch device that is simple in structure, highly reliable and can be manually driven.

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

[0005] This utility model provides a switching device, including a housing, within which at least one contact unit and an electromagnetic operating system for driving the contact unit are disposed. The contact unit includes a contact mechanism, which includes a moving contact assembly and a stationary contact that cooperate with each other. The electromagnetic operating system includes a coil assembly and a moving assembly, which is drivenly connected to the moving contact assembly. The moving assembly is also connected to an operating element extending outside the housing. The moving assembly is driven by the coil assembly or the operating element to move between a first position and a second position, thereby causing the moving contact assembly to move toward or away from the stationary contact.

[0006] Preferably, the coil assembly includes a coil frame, with a magnet disposed at each of the opposite ends of the coil frame, and two coils wound around the outside of the coil frame between the two magnets. The two coils are distributed along the axial direction of the coil frame, and a movable component is slidably mounted in the middle of the coil frame. The movable component engages with one magnet in a first position and with the other magnet in a second position.

[0007] Preferably, the magnetic properties of the two magnets are opposite at opposite ends. When energized, the magnetic properties of the two coils are the same at adjacent ends. One magnet generates a repulsive force with the adjacent coil, and the other magnet generates a magnetic attraction force with the adjacent coil. The moving iron core is driven by the repulsive force and the magnetic attraction force.

[0008] Preferably, it also includes two buffer plates, which are located between the magnet and the moving iron core.

[0009] Preferably, the electromagnetic operating system further includes a magnetic yoke, which is disposed around the outside of the coil assembly and has a through hole for the moving assembly to pass through.

[0010] Preferably, the magnetic yoke includes two magnetic yoke plates, each magnetic yoke plate being disposed around one end of the coil frame and around the outside of a coil.

[0011] Preferably, the coil assembly includes a coil frame, a magnetic yoke is arranged around the outer side of the coil frame, two coils are wound in the middle of the coil frame, the two coils are distributed along the axial direction of the coil frame, and two magnets are positioned between the two coils. The two magnets form a symmetrical structure about the central axis of the coil frame and are capable of magnetizing the magnetic yoke.

[0012] Preferably, the magnetic poles of the two magnets are the same at opposite ends. When energized, the magnetism of the adjacent ends of the two coils is opposite. The other end of one coil has the same magnetism as the magnetized yoke, and the other end of the other coil has the opposite magnetism to the magnetized yoke. The moving iron core is driven by the coils and the magnetized yoke together.

[0013] Preferably, two magnet cavities are provided on the outer side of the middle part of the coil frame, and a magnet is assembled in each magnet cavity.

[0014] Preferably, a limiting boss is provided inside the magnet cavity, and the limiting boss abuts against and limits the magnet.

[0015] Preferably, the magnetic yoke includes two spaced magnetic yoke plates, each magnetic yoke plate being respectively attached to both ends of the coil frame, each magnetic yoke plate having a through hole for the moving component to pass through, and one of the magnetic yoke plates having two side plates extending along the axial direction of the coil frame at both ends, the two side plates being located on opposite sides of the coil frame and connected to the other magnetic yoke plate to form a closed frame structure.

[0016] Preferably, the moving component includes a moving iron core and a drive rod. The moving iron core is slidably disposed between two magnets. The drive rod is connected to the moving iron core, and both ends of the drive rod extend out of the coil frame and are respectively linked to the operating component and the moving contact assembly.

[0017] Preferably, one end of the drive rod is connected to a linkage plate, and the linkage plate is linked to the moving contact assembly of at least one contact unit.

[0018] Preferably, the drive rod is provided with at least three clamping members, each clamping member being arranged through the axis perpendicular to the drive rod, and the operating member, the moving iron core, and the linkage plate are each provided with at least one slot for limiting the clamping members.

[0019] Preferably, it includes a contact unit, the moving contact assembly includes a contact support and a moving contact bridge disposed on the contact support, and the moving component is drivenly connected to the contact support.

[0020] Preferably, the assembly includes at least two contact units arranged side by side. The moving contact assembly includes a contact support and a moving contact bridge disposed on the contact support. Two adjacent contacts are linked together. The moving component is driven to one of the contacts, or the moving component is connected to a linkage plate, and the linkage plate is linked to the two contacts respectively.

[0021] Preferably, the contact unit includes a housing, the contact support is provided with at least one linkage shaft, the linkage shaft slides along a linkage groove opened in the housing, the linkage plate spans at least one contact unit, the linkage plate is provided with a connection hole for the linkage shaft to pass through, and the moving contact assemblies of two adjacent contact units are linked together through the linkage shaft.

[0022] Preferably, each contact unit further includes two arc-extinguishing systems, which are respectively disposed on opposite sides of the contact mechanism.

[0023] Preferably, each arc extinguishing system includes an arc extinguishing chamber and a magnetizing component that cooperates with the arc extinguishing chamber. The arc inlet end of the arc extinguishing chamber faces the contact mechanism, and the exhaust end of the arc extinguishing chamber is located at the end away from the contact mechanism. The magnetizing component includes two magnetic plates, which are spaced apart to form an arc ignition space. Each arc extinguishing chamber is located in the arc ignition space, and a permanent magnet is provided at one end of the arc ignition space to form an arc ignition magnetic field in the arc ignition space.

[0024] The switching device of this utility model has an operating component connected to the moving component of its electromagnetic operating system, which allows the moving component of the electromagnetic operating system to be operated manually or driven by the coil component, thereby improving the operational reliability of the switching device.

[0025] In addition, the electromagnetic operating system has two coils on its coil frame, which drive the moving iron core to move between the first and second positions. At the same time, two magnets are attracted to the moving iron core at the first and second positions respectively. Compared with the existing structure that uses a motor and gear set, it has the advantages of simple driving process, high reliability and low cost.

[0026] In addition, the magnetic properties of the opposite ends of the two magnets are opposite. When energized, the magnetic properties of the adjacent ends of the two coils are the same. Each magnet can cooperate with the adjacent magnet, so that the moving iron core is subjected to a stable driving force, which helps to improve the overall reliability.

[0027] In particular, a buffer plate is installed between the moving iron core and the magnet to prevent the moving iron core from directly impacting the magnet, which helps to extend the service life of the electromagnetic operating system.

[0028] In addition, two magnets are positioned between the two coils to limit their movement. When energized, the magnetic properties of the adjacent ends of the two coils are opposite. The moving iron core is driven by the magnets and the magnetized yoke, which helps to simplify the structure of the electromagnetic operating system. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the switching device of this utility model (four poles);

[0030] Figure 2 This is a schematic diagram of the structure (two poles) of the switching device of this utility model;

[0031] Figure 3 This is a structural schematic diagram of the switching device of this utility model (single pole).

[0032] Figure 4-5 This is a schematic diagram of the structure of the switch device for removing the cover in this utility model;

[0033] Figure 6 This is a schematic diagram showing the cooperation of the control circuit board, electromagnetic operating system, current detection device and contact unit in this utility model;

[0034] Figure 7 This is a schematic diagram showing the cooperation between multiple contact units and the linkage plate in this utility model;

[0035] Figure 8 This is an exploded view of multiple contact units and linkage plates in this utility model;

[0036] Figure 9 This is a schematic diagram showing the cooperation of the housing, connecting circuit board, control circuit board and electromagnetic operating system in this utility model;

[0037] Figure 10 This is a schematic diagram showing the cooperation between the electromagnetic operating system, operating components, and linkage plate in this utility model;

[0038] Figure 11 This is a cross-sectional view of the electromagnetic operating system, operating components, and linkage plate in this utility model;

[0039] Figure 12 This is a schematic diagram of the structure of the first electromagnetic operating system in this utility model;

[0040] Figure 13 This is a cross-sectional view of the first electromagnetic operating system in this utility model;

[0041] Figure 14 This is a schematic diagram (first position) of the cooperation between the coil, moving iron core and magnet in the first electromagnetic operating system of this utility model;

[0042] Figure 15This is a schematic diagram (second position) of the cooperation between the coil, moving iron core and magnet in the first electromagnetic operating system of this utility model;

[0043] Figure 16 This is a cross-sectional view of the second electromagnetic operating system in this utility model;

[0044] Figure 17 This is a schematic diagram of the coil frame and drive rod in the second electromagnetic operating system of this utility model;

[0045] Figure 18 This is a cross-sectional view (at the magnet) of the second electromagnetic operating system in this utility model;

[0046] Figure 19 This is a schematic diagram (first position) showing the cooperation of the coil, moving iron core, and magnet in the second electromagnetic operating system of this utility model;

[0047] Figure 20 This is a schematic diagram (second position) showing the cooperation of the coil, moving iron core, and magnet in the second electromagnetic operating system of this utility model;

[0048] Figure 21 This is a schematic diagram of the cooperation between the electromagnetic operating system and the moving contact assembly in this utility model;

[0049] Figure 22 This is a schematic diagram of the contact unit and the manganese-copper shunt in this utility model;

[0050] Figure 23 This is a schematic diagram of the contact unit and Hall element in this utility model;

[0051] Figure 24 This is a schematic diagram showing the interaction of the contact unit, Hall element, and connecting circuit board in this utility model;

[0052] Figure 25 This is a schematic diagram of the structure of the intermediate housing of this utility model;

[0053] Figure 26 This is a schematic diagram of the internal structure of the contact unit in this utility model;

[0054] Figure 27 yes Figure 26 The main view;

[0055] Figure 28 yes Figure 26 The main view;

[0056] Figure 29 This is a cross-sectional view of the contact unit in this utility model;

[0057] Figure 30 This is a cross-sectional view of the contact unit in this utility model (the exhaust port is equipped with a baffle);

[0058] Figure label:

[0059] 1-Outer shell, 10-Assembly cavity, 11-Base, 12-Cover, 13-Partition plate, 14-Wiring port, 2-Contact unit, 21-Shell, 2101-Support wall, 2102-Connecting wall, 2103-End wall, 211-Linkage groove, 212-Exhaust port, 213-First barrier part, 214-Second barrier part, 215-Insulating plate, 216-Baffle plate, 217-Isolation groove, 2 18-Magnetic plate mounting slot, 2191-First positioning hole, 2192-Second positioning hole, 220-Moving contact assembly, 221-Contact support, 2211-Linkage shaft, 2212-Isolation plate, 222-Moving contact bridge, 2221-Moving contact part, 223-Stationary contact, 2231-Conductive plate, 2232-Stationary contact part, 230-Exhaust channel, 231-Arc extinguishing chamber, 232-Magnetic guide plate 233-Permanent magnet, 234-Moving arc-inducing plate, 235-Static arc-inducing plate, 24-Wiring assembly, 3-Electromagnetic operating system, 30-Operating component, 31-Coil frame, 310-Separator, 311-Baffle, 312-Winding shaft, 313-Magnet cavity, 314-Limiting boss, 32-Magnet, 321-First magnet, 322-Second magnet, 33-Moving iron core, 34-Coil, 341-First coil, 342-Second coil, 35-Magnetic yoke, 351-First straight plate, 352-Second straight plate, 36-Buffer plate, 37-Drive rod, 38-Clamping component, 4-Linkage plate, 41-Connecting hole, 42-Linkage hole, 511-Transmission circuit board, 52-Manganese copper shunt, 6-Control circuit board, 60-Signal port, 61-Branch circuit board, 63-Connecting circuit board. Detailed Implementation

[0060] 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.

[0061] like Figure 1-3 As shown, the switching device includes a housing 1, within which an electromagnetic operating system 3 and at least one contact unit 2 are disposed. The electromagnetic operating system 3 is connected to a control circuit board 6 disposed within the housing 1. The control circuit board 6 is equipped with a controller for controlling the electromagnetic operating system 3. The electromagnetic operating system 3 drives the contact unit 2 to open and close the circuit. That is, when there is one contact unit 2 disposed within the housing 1, the electromagnetic operating system 3 directly or indirectly drives the contact unit 2. When there are at least two contact units 2 disposed within the housing 1, the electromagnetic operating system 3 is directly or indirectly connected to one of the contact units 2. Two adjacent contact units 2 are linked together and thus indirectly driven by the electromagnetic operating system 3, thereby realizing the synchronous opening and closing of multiple contact units 2.

[0062] Specifically, the electromagnetic operating system 3 includes a coil assembly and a moving assembly, which is driven by the coil assembly to move between a first position and a second position. Each contact unit 2 includes at least a pair of wiring assemblies 24 and a contact mechanism, which is disposed between the pair of wiring assemblies 24. The contact mechanism includes a moving contact assembly 220 and two stationary contacts 223. At least one moving contact assembly 220 of the contact unit 2 is directly or indirectly driven connected to the moving assembly, and the moving contact assemblies 220 of two adjacent contact units 2 are linked together. The driving method adopts existing technology. 20 includes a contact support 221 and a moving contact bridge 222 disposed on the contact support 221. The moving component is directly or indirectly driven connected to the contact support 221. Two adjacent moving contact components 220 are linked together through the contact support 221. Each end of the moving contact bridge 222 is provided with a moving contact portion 2221. Each moving contact portion 2221 cooperates with the stationary contact portion 2232 of a stationary contact 223. Each stationary contact 223 is connected to an adjacent wiring component 24. One wiring component 24 is used for incoming wires, and the other wiring component 24 is used for outgoing wires.

[0063] Furthermore, the contact unit 2 also includes two arc-extinguishing systems, each configured on one side of the contact mechanism to extinguish the arc generated when the contact mechanism breaks. Additionally, the contact unit 2 may also include a current detection device, which is connected to the control circuit board 6 to provide feedback on the collected current.

[0064] For ease of description, the direction of movement of the moving component in the electromagnetic operating system 3 is taken as the first direction. Figure 5 , 7 In this context, the direction along the Y-axis is taken as the first direction, and the two directions perpendicular to the first direction are taken as the second and third directions. Figure 5 , 7 In this context, the direction of the X-axis is taken as the second direction, and the direction of the Z-axis is taken as the third direction. When at least two contact units 2 are provided inside the housing 1, two adjacent contact units 2 are arranged side by side along the second direction, and a pair of wiring components 24 in each contact unit 2 are spaced apart along the third direction. That is, the connecting line between a pair of wiring components 24 is parallel to the third direction.

[0065] The improvement of this application lies in that the moving component is also connected to an operating element 30, which drives the moving component to move between a first position and a second position, thereby driving the moving contact assembly 220 to move closer to or further away from the stationary contact 223. Thus, the moving component of the electromagnetic operating system 3 is connected to the operating element 30, allowing the moving component of the electromagnetic operating system 3 to be operated manually or driven by the coil assembly, improving the operational reliability of the switching device.

[0066] Furthermore, the coil assembly includes a coil frame 31, with a magnet 32 ​​disposed at each of its opposite ends. Two coils 34 are wound around the outer side of the coil frame 31 between the two magnets 32, and the two coils 34 are distributed along the axial direction of the coil frame 31. A moving component is slidably mounted in the middle of the coil frame 31. The moving component engages with one magnet 32 ​​in a first position and with the other magnet 32 ​​in a second position. Specifically, the moving component includes a moving iron core 33 and a drive rod 37. The moving iron core 33 is slidably disposed between the two magnets 32, and the drive rod 37 is connected to the moving iron core 33. Both ends of the coil 34 extend beyond the coil frame 31 for connection with the operating element 30 and the moving contact assembly 220. Preferably, the magnetic properties of the opposite ends of the two magnets 32 are opposite. In the energized state, the magnetic properties of the adjacent ends of the two coils 34 are the same. That is, in the energized state, a repulsive force is generated between one magnet 32 ​​and the adjacent coil 34, and a magnetic attraction force is generated between the other magnet 32 ​​and the adjacent coil 34. The moving iron core 33 is driven by the repulsive force and the magnetic attraction force, so that each coil 34 can cooperate with the adjacent magnet 32, so that the moving iron core 33 is subjected to a stable driving force, which helps to improve the overall reliability.

[0067] Furthermore, the electromagnetic operating system 3 also includes two buffer plates 36, each buffer plate 36 being disposed between the moving iron core 33 and a magnet 32. The buffer plates 36 mitigate the impact force of the moving iron core 33 on the magnet 32, thereby extending the service life of the electromagnetic operating system 3.

[0068] Combination Figure 1-30 A specific embodiment of a switching device is provided.

[0069] like Figure 1-5 As shown in Figure 9, the switching device includes a housing 1, within which an electromagnetic operating system 3 and at least one contact unit 2 are disposed. The electromagnetic operating system 3 and the contact unit 2 are disposed within the housing 1 along a first direction. When there are at least two contact units 2 within the housing 1, the two contact units 2 are arranged side by side in a second direction. In this embodiment, four contact units 2 are disposed side by side in a second direction within the housing 1. Each contact unit 2 includes a pair of wiring components 24, a contact mechanism, and two arc-extinguishing systems. The pair of wiring components 24 are spaced apart in a third direction, and the contact mechanism is disposed between the pair of wiring components 24. An arc-extinguishing system is disposed between the contact mechanism and one wiring component 24, and the arc-extinguishing system cooperates to extinguish the arc generated when the contact mechanism is opened.

[0070] like Figure 1-5As shown, the two ends of the outer casing 1 serve as wiring terminals, and the connecting line between the two wiring terminals is parallel to the third direction. The middle part of the outer casing 1 between the two wiring terminals protrudes outward along the first direction to form an operating end. The operating end is provided with a drive hole. The outer casing 1 includes a base 11 and a cover 12, wherein the cover 12 covers the base 11 in the first direction, and the drive hole is opened on the cover 12. Three partitions 13 are provided in the base 11, and two adjacent partitions 13 are spaced apart in the second direction. The partitions 13 divide the space in the base 11 into four assembly cavities. A contact unit 2 is provided in each assembly cavity. The same end of all assembly cavities forms a wiring cavity, and the wiring cavity is provided with a wiring port 14. The electromagnetic operating system 3 and the control circuit board 6 are located between the base 11 and the cover 12, that is, between the contact unit 2 and the cover 12 in the first direction. The electromagnetic operating system 3 and the control circuit board 6 correspond to the inside of the operating end of the outer casing 1. Each partition 13 is provided with an avoidance notch near the edge of the electromagnetic operating system 3 to avoid interfering with the operation of the electromagnetic operating system 3.

[0071] like Figure 4-6 As shown in Figure 9, the control circuit board 6 and the electromagnetic operating system 3 are arranged side by side in the second direction or the third direction. In particular, when the housing 1 is provided with at least two contact units 2, the control circuit board 6 spans one or two contact units 2 in the second direction. Specifically, when there are two contact units 2 in the housing 1, the control circuit board 6 spans all contact units 2 in the second direction. When there are three or more contact units in the housing 1, the control circuit board 6 spans one or two contact units 2 (assembly cavities), preferably spanning one or two contact units 2 (assembly cavities) located in the middle position.

[0072] Preferably, the control circuit board 6 is divided into at least two sub-circuit boards 61, which are located on opposite sides of the electromagnetic operating system 3, or the two sub-circuit boards 61 are located on the same side of the electromagnetic operating system 3. This facilitates the distributed assembly of the control circuit board 6, meets the switching devices with different requirements, and has strong applicability.

[0073] Specifically, such as Figure 4-6 As shown, when the two circuit boards 61 are located on opposite sides of the electromagnetic operating system 3, if a contact unit 2 is provided inside the housing 1, the plane of each circuit board 61 is parallel to both the first and third directions. In this case, the circuit board 61 fits against the inner wall of the housing 1 in the second direction, thus avoiding the space occupied by the circuit board 61 in the second direction, which is beneficial for reducing the thickness of the switching device. If at least two contact units 2 are provided inside the housing 1, it is preferable to... Figure 6As shown, the plane of each branch circuit board 61 is parallel to both the first and second directions. In this case, each branch circuit board 61 can span one or two contact units 2 in the second direction. That is, when there are two contact units 2 in the housing 1, the branch circuit board 61 spans all contact units 2. When there are three or more contact units 2 in the housing 1, the branch circuit board 61 spans one or two contact units 2, which facilitates the wiring between the branch circuit board 61 and each contact unit 2.

[0074] like Figure 4-6 As shown, in the third direction, the two branch circuit boards 61 can also be arranged on the same side of the electromagnetic operating system 3, with the two branch circuit boards 61 connected at an angle. In the figure, the two branch circuit boards 61 are connected perpendicularly to each other, with one branch circuit board 61 closer to the electromagnetic operating system 3, and its plane being parallel to both the first and second directions. The plane of the other branch circuit board 61 is parallel to both the second and third directions. This structure is suitable for housing 1 with at least two contact units 2. Of course, the control circuit board 6 can also be an integral structure, and its assembly position with the electromagnetic operating system 3 can refer to the setting position of any branch circuit board 61, but it may occupy more space inside the housing 1. In addition, the control circuit board 6 can be provided with a signal port 60, and a socket is opened in the area of ​​housing 1 corresponding to the signal port 60. The signal port 60 and the socket can be located on the operating end of housing 1. Of course, the signal port 60 can also be set in other positions of housing 1.

[0075] like Figure 9-20As shown, the electromagnetic operating system 3 includes a coil assembly, a magnetic yoke 35, and a moving assembly. The coil assembly is connected to a control circuit board 6 disposed within the housing 1. The controller of the control circuit board 6 outputs control signals to control the current of the coil assembly, thereby driving the moving assembly to move between a first position and a second position. The coil assembly includes a coil frame 31, around which a magnetic yoke 35 is arranged. Two coils 34 are wound in the middle of the coil frame 31, and the two coils 34 are distributed along the axial direction of the coil frame 31, that is, along a first direction. Each coil 34 is connected to the control circuit board 6. In this embodiment, each coil 34 can be connected to a corresponding branch circuit board 61. The controller of the control circuit board 6 controls whether the coil 34 is energized and the current. Direction; the coil frame 31 is also equipped with two magnets 32. The two magnets 32 can be respectively set at opposite ends of the coil frame 31, or the magnets 32 can be set in the middle of the coil frame 31 and located between the two coils 34. The magnets 32 can magnetize the adjacent yokes 35. A moving component is slidably assembled in the middle of the coil frame 31. The coil component drives the moving component to move between a first position and a second position. That is, if the two magnets 32 are set at both ends of the coil frame 31, the magnets 32 and the coils 34 work together to drive the moving component, so that the moving component is attracted to one magnet 32 ​​in the first position and to the other magnet 32 ​​in the second position; if the two magnets 32 are located between the two coils 34, the magnets 32 and the magnetized yokes 35 work together to drive the moving component.

[0076] The moving component includes a moving iron core 33, which is slidably disposed in the middle of the coil frame 31. That is, the moving iron core 33 is located between two magnets 32. In the energized state, the moving iron core 33 is driven by two coils 34 to move between a first position and a second position. At least one end of the drive rod 37 connected to the moving iron core 33 extends out of the coil frame 31 through the magnet 32. The drive rod 37 is directly or indirectly driven to connect with the moving contact assembly 220 of at least one contact unit 2.

[0077] Furthermore, the moving component also includes a drive rod 37, which is connected to the moving iron core 33 and driven by the moving iron core 33 to move along the axial direction of the coil frame 31. At least one end of the drive rod 37 extends out of the coil frame 31 through one of the magnets 32 and is used to connect with the moving contact assembly 220 of at least one contact unit 2, thereby realizing the driving of the contact unit 2 by the electromagnetic operating system 3. In this embodiment, when the moving component moves to the first position, the contact mechanism of the contact unit 2 is open, and when the moving component moves to the second position, the contact mechanism of the contact unit 2 is closed.

[0078] Preferably, the movable component is also connected to an operating element 30, which extends outside the housing 1. The electromagnetic operating system 3 can be operated from the outside via the operating element 30, causing the movable component to move between the first position and the second position, thereby driving the contact mechanism of the contact unit 2 to open. In this way, the movable component of the electromagnetic operating system 3 can be operated manually or driven by the coil assembly, improving the operational reliability of the switching device.

[0079] Furthermore, the electromagnetic operating system 3 also includes two buffer plates 36, each buffer plate 36 being disposed between the moving iron core 33 and a magnet 32. Preferably, each buffer plate 36 is disposed at one end of the coil frame 31, and the buffer plate 36 is located between the magnet 32 ​​and the moving iron core 33. The buffer plate 36 buffers the impact force of the moving iron core 33 on the magnet 32, which helps to extend the service life.

[0080] In addition, the electromagnetic operating system 3 also includes a magnetic yoke 35, which is disposed around the outside of the coil frame 31. The magnetic yoke 35 is provided with a through hole for the drive rod 37 to pass through. The through hole in the magnetic yoke 35 corresponds to the through hole in the magnet 32. Preferably, the magnetic yoke 35 includes two magnetic yoke plates, each of which is disposed around one end of the coil frame 31 and around the outside of a coil 34.

[0081] Combination Figure 10-13 The specific structure of the first electromagnetic operating system 3 is provided. The electromagnetic operating system 3 includes a coil assembly and a moving assembly, wherein the coil assembly includes a coil frame 31. Figure 11 , 13 In the coil frame 31, two spaced-apart baffles 311 are connected between the two baffles 311 and a hollow winding shaft 312. A receiving groove is formed in the middle of the surface of each baffle 311 on the side opposite to the winding shaft 312. The bottom of each receiving groove communicates with the hollow portion of the winding shaft 312. A buffer plate 36 and a magnet 32 ​​are disposed in each receiving groove. Corresponding through holes are formed in the middle of the buffer plate 36 and the magnet 32. The hollow portion of the winding shaft 312 serves as a sliding cavity. The perforation of 2 is coaxial with the sliding cavity; a partition 310 is also provided in the middle of the coil frame 31. The partition 310 protrudes outward along the middle outer side of the coil frame 31. That is, a partition 310 protrudes outward from the middle outer side wall of the winding shaft 312. The partition 310 divides the space between the two baffles 311 into two accommodating cavities. The partition 310 divides the middle part of the coil frame 31 into two parts. Preferably, a limiting groove is provided on the partition 310. The limiting groove is preferably provided along the circumferential direction of the partition 310.

[0082] A magnetic yoke 35 is arranged around the coil assembly, such as Figure 10-13As shown, the magnetic yoke 35 includes two magnetic yoke plates, each including a first straight plate 351 and two second straight plates 352. The first straight plate 351 is correspondingly covered on a magnet 32, and the two second straight plates 352 are respectively disposed on opposite sides of the coil frame 31. One end of each second straight plate 352 is connected to one end of the first straight plate 351, and the other end of each second straight plate 352 is bent and extended toward the middle of the coil frame 31. Preferably, the other end of each second straight plate 352 is inserted into the limiting groove of the partition 310 to ensure the overall fit stability of the mechanism, so that each magnetic yoke plate closes the accommodating cavity to form a coil mounting cavity. Two coils 34 are wound on the winding shaft 312, and each coil 34 is correspondingly located in a coil mounting cavity. The two coils 34 are separated by the partition 310. At least one of the first straight plates 351 has a through hole coaxial with the sliding cavity. In this embodiment, the two first straight plates 351 have through holes in the middle.

[0083] The moving component includes a moving iron core 33 and a drive rod 37. The moving iron core 33 is slidably assembled in a sliding cavity. The drive rod 37 is provided in the middle of the moving iron core 33. The two ends of the drive rod 37 extend from the through holes of the buffer plate 36 and the magnet 32, respectively. Both the moving iron core 33 and the drive rod 37 are made of magnetically conductive material. The moving iron core 33 and the drive rod 37 can be an integral structure or two separate parts. In this embodiment, the drive rod 37 and the moving iron core 33 are two separate parts. A clamping member 38 is provided in the middle of the drive rod 37. Preferably, the clamping member 38 is provided through the drive rod 37 along an axial direction perpendicular to the drive rod 37. A through groove is opened in the middle of the moving iron core 33 for the drive rod 37 to pass through. A slot for limiting the clamping member 38 is provided in the through groove.

[0084] In this embodiment, as Figure 11 As shown, a clamping member 38 is provided at each end of the drive rod 37. The operating member 30 has a connecting groove. One end of the drive rod 37 is inserted into the connecting groove. A slot for limiting the clamping member 38 is provided in the connecting groove. The other end of the drive rod 37 can directly or indirectly drive a contact unit 2. When the other end of the drive rod 37 is directly connected to the contact unit 2, that is, when the other end of the drive rod 37 is connected to the moving contact assembly 220, a slot for limiting the clamping member 38 is provided on the moving contact assembly 220. When the other end of the drive rod 37 indirectly drives the contact unit 2, a linkage plate 4 is connected to the drive rod 37. At this time, at least a slot for limiting the clamping member 38 is provided on the linkage plate 4. Of course, the connection between the drive rod 37 and the moving iron core 33, the linkage plate 4 and the operating component 30 can also adopt other fastening structures, such as bonding, threaded connection, etc. The other end of the operating component 30 slides through the drive hole opened at the operating end (cover 12) and extends to the outside of the outer shell 1, thereby realizing the operation of the electromagnetic operating system 3 from the outside.

[0085] In this structure, the magnetic properties of the two magnets 32 are opposite at their opposite ends. When energized, the magnetic properties of the two coils 34 are the same at their adjacent ends. One magnet 32 ​​generates a repulsive force with the adjacent coil 34, while the other magnet 32 ​​generates a magnetic attraction force with the adjacent coil 34. The moving iron core 33 is driven by the repulsive force and the magnetic attraction force, so that the driving force for the movement of the moving iron core 33 is reliably guaranteed.

[0086] The specific principle is as follows: Figure 14 , 15 As shown, the upper position in the figure is the first position, and the lower position in the figure is the second position. The magnet 32 ​​closer to the first position is the first magnet 321, and the magnet 32 ​​closer to the second position is the second magnet 322. The coil 34 closer to the first position is the first coil 341, and the coil 34 closer to the second position is the second coil 342. In the figure, the N pole of the first magnet 321 faces the S pole of the second magnet 322.

[0087] When the second current is applied, the magnetic poles of the adjacent ends of the first coil 341 and the second coil 342 are S poles, and the end of the first coil 341 facing the first magnet 321 is the N pole. The N poles of the first magnet 321 and the first coil 341 are opposite each other, thus generating a repulsive force between them. The end of the second coil 342 facing the second magnet 322 is the N pole, and the N poles of the second magnet 322 and the second coil 342 are opposite each other, thus generating a magnetic attraction force between them. Driven by the repulsive force, the moving iron core 33 moves away from the first magnet 321, and driven by the magnetic attraction force, moves closer to the second magnet 322 and stays attracted to the second magnet 322.

[0088] When the first current is applied, the magnetic poles of the adjacent ends of the first coil 341 and the second coil 341 are N poles, and the end of the first coil 341 facing the first magnet 321 is the S pole. The N poles and S poles of the first magnet 321 and the first coil 341 are opposite to each other, generating a magnetic attraction between them. The end of the second coil 342 facing the second magnet 322 is the S pole, and the S poles of the second coil 342 and the second magnet 322 are opposite to each other, generating a repulsive force between them. Under the action of the repulsive force, the moving iron core 33 moves away from the second magnet 322 and moves closer to the first magnet 321 under the action of the magnetic attraction, maintaining attraction with the first magnet 321. The first current and the second current are in opposite directions.

[0089] Preferably, when the moving iron core 33 is attracted to one of the magnets 32, the power supply to the two coils 34 is stopped, which is beneficial for energy saving. The axial length of the moving iron core 33 is greater than the axial length of each coil 34, which is beneficial for each coil 34 to apply driving force to the moving iron core 33 when energized. In the figure, L1 represents the axial length of the moving iron core 33 and L2 represents the length of the coil 34.

[0090] Combination Figure 16-20 The specific structure of the second electromagnetic operating system 3 is provided.

[0091] The electromagnetic operating system 3 includes a coil assembly, a magnetic yoke 35, and a moving assembly. The coil assembly includes a coil frame 31, and the magnetic yoke 35 surrounds the outside of the coil frame 31. Two coils 34 are wound in the middle of the coil frame 31. The two coils 34 are distributed along the axis of the coil frame 31. Two magnets 32 are positioned between the two coils 34. That is, the two magnets 32 are respectively located on opposite sides of the middle of the coil frame 31 to magnetize the magnetic yoke 35. In the axial direction of the coil frame 31, the magnets 32 are located between the two coils 34. At this time, the two magnets 32 form a symmetrical structure about the central axis of the coil frame 31.

[0092] In this structure, the coil frame 31 includes two spaced-apart baffles 311, and a hollow winding shaft 312 is connected between the two baffles 311. The middle part of each baffle 311 is connected to the hollow part of the winding shaft 312. The hollow part of the winding shaft 312 serves as a sliding cavity. The middle part of the coil frame 31 is also provided with a protrusion. The protrusion protrudes outward along the middle outer side of the coil frame 31. That is, a protrusion is provided on the outer wall of the middle part of the winding shaft 312. The protrusion divides the space between the two baffles 311 into two accommodating cavities. A magnet cavity 313 is formed inside each protrusion. A magnet 32 ​​is provided in each magnet cavity 313. Preferably, the cavity shapes of the two magnet cavities 313 are irregular, thereby realizing the foolproof function. Furthermore, a limiting boss 314 is provided in the magnet cavity 313. The limiting boss 314 can abut against the magnet 32 ​​to limit the magnet 32.

[0093] The magnetic yoke 35 includes two spaced magnetic yoke plates, each magnetic yoke plate being attached to both ends of the coil frame 31. Each magnetic yoke plate has a through hole for the moving component to pass through, and the through hole communicates with the sliding cavity. One of the magnetic yoke plates extends along the axial direction of the coil frame 31 to form two side plates. The two side plates are located on opposite sides of the coil frame 31 and are connected to the other magnetic yoke plate, so that the magnetic yoke 35 as a whole forms a closed frame structure.

[0094] Similar to the moving component of the first electromagnetic operating system 3, the moving component includes a moving iron core 33 and a drive rod 37. The moving iron core 33 is slidably assembled within a sliding cavity, and the drive rod 37 is located in the middle of the moving iron core 33. Both ends of the drive rod 37 extend from the through holes in the magnetic yoke 35, and the drive rod 37 is also equipped with corresponding snap-fit ​​parts 38. Compared to the first electromagnetic operating system 3, this structure omits the buffer plate 36, simplifies the construction of the magnetic yoke 35, and correspondingly increases the magnetic field strength of the magnetic yoke 35.

[0095] In this structure, the two magnets 32 have the same magnetism at opposite ends. When energized, the magnetism at adjacent ends of the two coils 34 is opposite. The other end of one coil 34 has the same magnetism as the magnetized yoke 35, and the other end of the other coil 34 has the opposite magnetism to the magnetized yoke 35. The moving iron core 33 is driven by the coils 34 and the magnetized yoke 35.

[0096] The specific principle is as follows: Figure 19 , 20 As shown, the upper position in the figure is the first position, and the lower position in the figure is the second position. The magnet 32 ​​on the left is the first magnet 321, and the magnet 32 ​​on the right is the second magnet 322. The coil 34 near the first position is the first coil 341, and the coil 34 near the second position is the second coil 342. In the figure, the S pole of the first magnet 321 faces the S pole of the second magnet 322.

[0097] When the second current is applied, the magnetic pole at one end of the first coil 341 and the second coil 342 adjacent to each other is the S pole, the magnetic pole at the other end of the first coil 341 is the N pole, and the magnetic pole at the other end of the second coil 342 is the S pole. After the magnetic yoke 35 is magnetized, the magnetic pole on the side facing the first coil 341 and the second coil 342 is the N pole. A repulsive force is generated between the magnetic yoke 35 and the first coil 341, and a magnetic attraction force is generated between the magnetic yoke 35 and the second coil 342. This drives the moving iron core 33 away from the first coil 341, that is, the moving iron core 33 moves to the second position.

[0098] When the first current is applied, the magnetic poles at the adjacent ends of the first coil 341 and the second coil 341 are N poles, the magnetic poles at the other end of the first coil 341 are S poles, the magnetic poles at the other end of the second coil 342 are N poles, and the magnetic yoke 35, after being magnetized, has N poles on the side facing the first coil 341 and the second coil 342. A magnetic attraction force is generated between the magnetic yoke 35 and the first coil 341, and a repulsive force is generated between the magnetic yoke 35 and the second coil 342. This drives the moving iron core 33 to approach the first coil 341, that is, the moving iron core 33 moves to the first position.

[0099] like Figure 7 , 8 As shown in Figures 10 and 11, when the electromagnetic operating system 3 drives more than one contact unit 2, the moving component can be directly driven to one of the contact units 2, and the remaining contact units 2 can be linked together, thereby realizing that the electromagnetic operating system 3 drives at least two contact units 2 to open and close synchronously. Preferably, a linkage plate 4 is connected to one end of the moving component, and multiple contact units 2 are linked together with the linkage plate 4 respectively. All contact units 2 are driven by the same linkage plate 4, which helps to ensure the synchronicity of the action of the contact units 2.

[0100] Specifically, the linkage plate 4 includes a plate-shaped linkage body. The two ends of the linkage body are bent to the same side to form a pair of spaced-apart linkage walls. A connection hole 41 is provided on each linkage wall. A linkage hole 42 is provided in the middle of the linkage body. One end of the drive rod 37 passes through the linkage hole 42. A slot for limiting and clamping member 38 is provided at the end of the linkage body facing away from the electromagnetic operating system 3.

[0101] In this embodiment, at least two contact units 2 are arranged side by side along the second direction, and a linkage shaft 2211 is linked between two adjacent contact units 2. The linkage plate 4 spans at least one contact unit 2 in the second direction. The linkage shaft 2211 passes through the connection hole 41 for linkage connection with the linkage plate 4. Preferably, the linkage hole 42 is located between two contact units 2. At this time, the electromagnetic operating system 3 corresponds to the middle position of the two contact units 2, thereby forming a symmetrical structure, which is beneficial to ensure that the electromagnetic operating system 3 applies the same driving force to the two contact units 2. When three or more contact units 2 are provided in the housing 1, in the second direction, the linkage plate 4 spans one or two contact units 2 located in the middle position. One end of the moving component is connected to the center position of the linkage plate 4, thereby forming a symmetrical structure to ensure the synchronization of the actions of multiple contact units 2.

[0102] In this embodiment, as Figure 4-9 As shown in Figure 26, each contact unit 2 includes a pair of wiring assemblies 24 spaced apart in a third direction. A contact mechanism is provided between the pair of wiring assemblies 24. The contact mechanism includes a moving contact assembly 220 and two stationary contacts 223. The moving contact assembly 220 includes a contact support 221 and a moving contact bridge 222. The moving contact bridge 222 is disposed on the contact support 221. The moving trajectory of the moving contact bridge 222 is perpendicular to the connecting line between the pair of connecting wire assemblies 24. That is, the central axis of the moving contact bridge 222 is parallel to the third direction. Two moving contact portions 2221 are provided at both ends of the moving contact bridge 222. The moving contact assembly 220 moves along the first direction under the drive of the moving assembly, so that each moving contact portion 2221 cooperates with the stationary contact portion 2232 of a stationary contact 223. Each stationary contact 223 is electrically connected to an adjacent wiring assembly 24.

[0103] like Figure 22-28As shown, each contact unit 2 also includes a current detection device, which is connected to the main circuit of each contact unit 2. The current detection device is connected to the control circuit board 6 located inside the housing 1 and is used to feed back the collected current signal to the control circuit board 6. The control circuit board 6 and the contact unit 2 are arranged along the first direction. In the third direction, the current detection device is arranged between a stationary contact 223 and an adjacent wiring assembly 24. The current detection device is connected to the adjacent stationary contact 223 or the moving contact assembly 220 at the closed position. The current detection device and the control circuit board 6 are connected through a connecting circuit board 63. The plane of the connecting circuit board 63 is parallel to the first direction and the third direction. In this embodiment, the control circuit board 6 and the contact unit 2 are no longer stacked. The current detection device is directly connected to the adjacent stationary contact 223 or the moving contact assembly 220 at the closing position. The connecting circuit board 63 does not need to pass through the contact unit 2 to connect to the control circuit board 6, which simplifies the wiring method of the current detection device, the control circuit board 6, and each contact unit 2. It has less interference with the internal structure of the contact unit 2, makes it easy to form a modular structure, and helps to reduce the assembly difficulty.

[0104] Preferred, such as Figure 6-9 As shown in Figures 22-30, each contact unit 2 also includes a housing 21, in which the contact mechanism is disposed within the housing 21, and each wiring assembly 24 is disposed outside one end of the housing 21. Furthermore, the moving contact assembly 220 and the stationary contact 223 of the contact mechanism adopt a bridge structure. The contact mechanism and the wiring assembly 24 are respectively disposed inside and outside the housing 21, ensuring that the contact mechanism forms a modular structure. This facilitates assembly and avoids the need to open operation holes for operating the wiring assembly 24 in the housing 21. This helps to ensure that the contact mechanism is in a relatively closed environment and reduces the interference of the external environment on the contact mechanism.

[0105] Specifically, two stationary contacts 223 are arranged side by side in the middle of the housing 21. When the circuit is open, the connecting line between each moving contact 2221 and a stationary contact 2232 is parallel to the first direction. That is, the connecting line between each moving contact 2221 and each stationary contact 2232 is perpendicular to the connecting line between a pair of wiring assemblies 24. This helps to reduce the space occupied by the contact mechanism and reduces the volume of the entire contact unit 2. Furthermore, an isolation groove 217 is provided in the housing 21 between the two stationary contacts 223, and an isolation plate 2212 is provided in the contact support 221. When the circuit is closed, the isolation plate 2212 can be inserted into the isolation groove 217 to block the two stationary contacts 223, ensuring the safety of the product.

[0106] Each contact unit 2 also includes two arc-extinguishing systems, which are respectively disposed on both sides of the contact mechanism. In the third direction, each arc-extinguishing system is located between the contact mechanism and a wiring assembly 24. Each arc-extinguishing system includes an arc-extinguishing chamber 231. The arc-entry end of the arc-extinguishing chamber 231 is opposite to the contact mechanism, and the exhaust end of the arc-extinguishing chamber 231 faces the wiring assembly 24. The arc-extinguishing chamber 231 includes multiple spaced arc-extinguishing grids 2311. An arc-extinguishing gap is formed between two adjacent arc-extinguishing grids 2311. The multiple arc-extinguishing gaps are spaced apart in the first direction. The two ends of the arc-extinguishing gaps are respectively connected to the arc-entry end and the exhaust end of the arc-extinguishing chamber 231. The end of the moving contact bridge 222 is connected to a moving arc-inducing plate 234. Each stationary contact 223 is connected to a stationary arc-inducing plate 235. The moving arc-inducing plate 234 and the stationary arc-inducing plate 235 are respectively connected to the arc-entry end of the arc-extinguishing chamber 231, which facilitates the introduction of the arc into the arc-extinguishing chamber 231 when the contact mechanism is opened.

[0107] like Figure 29 , 30 As shown, the exhaust port 212 on the housing 21 is located near the exhaust end of the arc-extinguishing chamber 231. Each exhaust port 212 is connected to the exhaust end of the arc-extinguishing chamber 231 to form multiple exhaust channels 230. Each exhaust channel 230 is connected to an arc-extinguishing gap. In this embodiment, each arc-extinguishing system also includes a barrier structure disposed between the exhaust end of the arc-extinguishing chamber 231 and the exhaust port 212. The barrier structure blocks a portion of each exhaust channel 230 to prevent each arc-extinguishing gap from being directly connected to the exhaust port 212 in a straight line. In this way, a portion of the exhaust channel 230 is blocked by the barrier structure, thereby preventing each arc-extinguishing gap from being directly connected to the exhaust port 212 in a straight line, avoiding the exhaust gas from being discharged directly from the exhaust end of the arc-extinguishing chamber 231 outside the housing 21, and reducing the discharge of high-temperature gas and charged particles.

[0108] Furthermore, the barrier structure includes a first barrier portion 213 and a second barrier portion 214 that are staggered. The first barrier portion 213 is spaced apart from the side region of the exhaust end of the arc-extinguishing chamber 231, and the second barrier portion 214 is spaced apart from the middle region of the exhaust end of the arc-extinguishing chamber 231. Preferably, the distance from the first barrier portion 213 to the exhaust end of the arc-extinguishing chamber 231 is less than the distance from the second barrier portion 214 to the exhaust end of the arc-extinguishing chamber 231. The first barrier portion 213 and the second barrier portion cooperate with each other to make the exhaust channel 230 as a whole zigzag shape. The gas flowing in the exhaust channel 230 is discharged after two turns, which avoids the arc-extinguishing gap and the exhaust port 212 being connected in a straight line, and prolongs the cooling and buffering time of the gas in the shell 21.

[0109] In addition, such as Figure 22-30As shown, each arc-extinguishing system also includes a magnetizing component. Each magnetizing component includes two magnetic plates 232, which are spaced apart to form an arc-ignition space. In this embodiment, the magnetic plates 232 are spaced apart from each other in the second direction. Each arc-extinguishing chamber 231 and the moving contact portion 2221 and the stationary contact portion 2232 adjacent to the arc-extinguishing chamber 231 are located in the arc-ignition space. A permanent magnet 233 is provided at one end of the arc-ignition space. The permanent magnet 233 forms an arc-ignition magnetic field in the arc-ignition space, which is beneficial for introducing the electric arc into the arc-extinguishing chamber 231.

[0110] The current detection device, connecting circuit board 63, and control circuit board 6 of each contact unit 2 are all located outside the housing 21, making each contact unit 2 a modular structure and preventing the connecting circuit board 63 from penetrating (arranged along the second direction) and causing interference to the interior of the contact unit 2. The current detection device can be a manganese copper shunt 52. Preferably, the manganese copper shunt 52 is connected to the conductive plate 2231 of one of the stationary contacts 223, and the signal end of the manganese copper shunt 52 is connected to the connecting circuit board 63. Alternatively, the current detection device can be a Hall element. The acquisition end of the Hall element is connected to one of the stationary contacts 223, and the Hall element is connected to a transmission circuit board 511. The transmission circuit board 511 is connected to the connecting circuit board 63 for signal transmission. Of course, the manganese copper shunt 52 and the acquisition end of the Hall element can be connected to the moving contact assembly 220 located in the closed position, that is, connected to the moving contact bridge 222 in the closed position.

[0111] Combination Figures 21-30 A specific structure for contact unit 2 is provided.

[0112] like Figure 26-28 As shown, the contact unit 2 includes a housing 21 and a pair of wiring assemblies 24. The housing 21 is generally a cuboid structure with one end closed and the other open. The housing 21 includes a pair of support walls 2101 spaced apart in a second direction. A pair of connecting walls 2102 and a pair of end walls 2103 connect the pair of support walls 2101. The pair of connecting walls 2102 are spaced apart and opposite each other in a third direction, and the pair of end walls 2103 are spaced apart and opposite each other in the first direction. An opening is formed in the middle of one of the end walls 2103. In the first direction, the electromagnetic operating system 3 is located outside this opening. Two strip-shaped linkage grooves 211 are respectively opened on the edges of the support walls 2101 on both sides of the opening. The central axis of the linkage grooves 211 is parallel to the first direction. Each connecting wall 2102 is provided with a wire hole. A pair of wiring assemblies 24 are spaced apart in the third direction. Each wiring assembly 24 is located outside the housing 21. In this embodiment, each wiring assembly 24 includes a wiring frame and a wiring screw provided on the wiring frame. The wiring frame corresponds to the wire hole. Each wiring assembly 24 is located at the end of each assembly cavity, and each wiring assembly 24 is located in the wiring cavity inside the wiring terminal of the housing 1.

[0113] The contact mechanism is correspondingly disposed in the housing 21 within the opening. The contact mechanism includes a moving contact assembly 220 and two stationary contacts 223. The moving contact assembly 220 includes a contact support 221 and a moving contact bridge 222. The contact support 221 has an assembly groove in the middle, which extends through a third direction. The moving contact bridge 222 is limited and assembled in the assembly groove, with both ends of the moving contact bridge 222 extending out of the assembly groove. The two ends of the moving contact bridge 222 are bent and extended away from the stationary contacts 223 to form moving arc-guiding plates 234. The two stationary contacts 223 are arranged side by side in the middle of the housing 21. Each stationary contact 223 is connected to a stationary arc-guiding plate 235, and each stationary arc-guiding plate 235 extends away from the moving contact assembly 220. The contact mechanism forms a symmetrical structure about the central axis of the opening. A partition is provided in the housing 21 between the two stationary contacts 223. The isolation groove 217 is a strip-shaped groove, and the strip-shaped groove is coaxial with the open end. An isolation plate 2212 is provided on the side of the contact support 221 facing the stationary contact 223. When closing, the isolation plate 2212 is inserted into the isolation groove 217 to isolate the two stationary contacts 223. At least one linkage shaft 2211 is provided on the side of the contact support 221 away from the stationary contact 223. The linkage shaft 2211 extends along the second direction. There are two linkage shafts 2211 in the figure. Each linkage shaft 2211 is matched with a linkage groove 211. Two adjacent contact supports 221 are linked and connected through the linkage shaft 2211. In addition, the contact support 221 can be provided with a shaft hole, and the linkage shaft 2211 is inserted into the shaft hole. Multiple contact supports 221 can share a linkage shaft 2211, thereby realizing the linkage connection of multiple contact supports 221.

[0114] In this embodiment, the stationary contact 223 includes a conductive plate 2231, which is disposed along the side of the housing 21. The first end of the conductive plate 2231 is folded back and has a stationary contact portion 2232 that is spaced apart from the moving contact portion 2221. The stationary contact portion 2232 and the moving contact portion 2221 are spaced apart from each other in a first direction. The end of the first end of the conductive plate 2231 is bent and extended to form a connecting portion for connecting the stationary arc-leading plate 235. The second end of the conductive plate 2231 extends in a third direction and extends out from the wire hole provided in the housing 21 to connect with a wiring assembly 24. The conductive plate 2231 of the stationary contact 223 extends directly to the outside of the housing 21 and connects with the wiring assembly 24, which simplifies the wiring of the wiring assembly 24 and the contact mechanism and has the advantage of convenient operation.

[0115] Preferably, the stationary arc-starting plate 235 and the conductive plate 2231 are arranged in parallel. A magnetic conductive element can be provided between the stationary arc-starting plate 235 and the conductive plate 2231 to shield the influence of the magnetic field generated by the current in the conductive plate 2231 on the arc movement of the stationary arc-starting plate 235.

[0116] like Figure 26-28 As shown, two arc-extinguishing systems are respectively arranged on opposite sides of the contact mechanism. Each arc-extinguishing system includes an arc-extinguishing chamber 231. The arc-inlet end of the arc-extinguishing chamber 231 faces the contact mechanism. The moving arc-initiating plate 234 extends to one side of the arc-inlet end of the arc-extinguishing chamber 231. One end of the stationary arc-initiating plate 235 is spaced apart from the moving arc-initiating plate 234 in a first direction and extends into the arc-extinguishing chamber 231. The exhaust end of the arc-extinguishing chamber 231 faces the wiring assembly 24. That is, the exhaust end of the arc-extinguishing chamber 231 is located away from the contact mechanism. On one side, a plurality of arc-extinguishing grid plates 2311 are arranged at intervals between the arc inlet end and the exhaust end of the arc-extinguishing chamber 231. In this embodiment, the plurality of arc-extinguishing grid plates 2311 in the same arc-extinguishing chamber 231 are arranged at intervals along the first direction, and an arc-extinguishing gap for cutting the arc is formed between two adjacent arc-extinguishing grid plates 2311. The conductive plate 2231 of the stationary contact 223 is arranged along the gap between the arc-extinguishing chamber 231 and the housing 21, which can make full use of the space inside the housing 21 and improve the space utilization rate.

[0117] An exhaust port 212 is provided on the side wall of the casing 21 near the exhaust end of each arc-extinguishing chamber 231, such as... Figure 24 , 25As shown, exhaust ports 212 are formed on a pair of support walls 2101 of the housing 21. The exhaust end of the arc-extinguishing chamber 231 is connected to the adjacent exhaust port 212 to form multiple exhaust channels 230. Each exhaust channel 230 is connected to an arc-extinguishing gap. A barrier structure is provided between the exhaust end of the arc-extinguishing chamber 231 and the exhaust port 212. The barrier structure blocks a portion of each exhaust channel 230 to prevent each arc-extinguishing gap from being connected to the exhaust port 212 in a straight line. The barrier structure includes a first, staggered... The first blocking part 213 is spaced apart from the side region of the exhaust end of the arc-extinguishing chamber 231, and the second blocking part 214 is spaced apart from the middle region of the exhaust end of the arc-extinguishing chamber 231. There are multiple first blocking parts 213, spaced apart along a first direction on each support wall 2101, and each first blocking part 213 corresponds to an arc-extinguishing gap. In the figure, each arc-extinguishing gap has a first blocking part 213 on both sides. Part 213 and exhaust port 212 are located on the same side of housing 21. Gas flowing in exhaust channel 230 is redirected once by first blocking part 213, flowing towards the central region corresponding to the exhaust end of arc-extinguishing chamber 231. A second blocking part 214 is provided on connecting wall 2102, which is spaced opposite to the exhaust end of arc-extinguishing chamber 231. The second blocking part 214 is a strip-shaped protrusion arranged along a first direction. The distance from the second blocking part 214 to the exhaust end of arc-extinguishing chamber 231 is greater than that of the first blocking part 214. The distance from the partition 213 to the exhaust end of the arc-extinguishing chamber 231, the two side edges of the second partition 214 are spaced opposite to the edges of the first partition 213, that is, in the third direction, the two side edges of the second partition 214 are spaced opposite to the edges of each of the first partitions 213. The gas flowing in the exhaust channel 230 is redirected a second time when it passes through the second partition 214. It can also be understood that the first partition 213 and the second partition 214 cooperate to make each exhaust channel 230 form a zigzag shape, such as Figure 29 As shown, the exhaust channel 230 is L-shaped. The gas flowing in the exhaust channel 230 is discharged after two turns, which avoids the arc extinguishing gap and the exhaust port 212 being connected in a straight line, and prolongs the cooling and buffering time of the gas in the shell 21.

[0118] In addition, such as Figure 5 and 30 As shown, the housing 21 is also equipped with a baffle 216, which blocks the area of ​​the exhaust port 212 near the arc-extinguishing chamber 231. If other components are installed outside the housing 21, the exhaust gas can be prevented from interfering with it. At the same time, the side of the baffle 216 facing the exhaust channel 230 can further deflect the gas, causing it to turn again, which is beneficial for further buffering and cooling of the gas. Figure 25As shown, the exhaust gas discharged from the exhaust end of the arc-extinguishing chamber 231 is discharged from the exhaust port 212 after three bounces. It can be understood that, with the cooperation of the first blocking part 213, the second blocking part 214 and the baffle 216, each exhaust channel 230 is Z-shaped as a whole. The baffle 216 is set along the outer side of the housing 21 in the figure, but the baffle 216 can also be set along the inner side of the housing 21.

[0119] Furthermore, each arc-extinguishing system also includes multiple spaced insulating plates 215. The multiple insulating plates 215 are disposed between the exhaust end and the exhaust port 212 of the arc-extinguishing chamber 231. An insulating gap is left between two adjacent insulating plates 215. Each insulating gap can be part of each exhaust channel 230 and corresponds to an arc-extinguishing gap. At this time, each first barrier 213 can be disposed in an insulating gap. The multiple insulating plates 215 disposed at the exhaust end of the arc-extinguishing chamber 231 help to prevent the arc from reigniting at the exhaust end of the arc-extinguishing chamber 231 and improve the safety of use.

[0120] Each arc-extinguishing system also includes a magnetizing component, which comprises a permanent magnet 233 and two magnetically conductive plates 232. The two magnetically conductive plates 232 are spaced apart to form an arc-initiating space, that is, the two magnetically conductive plates 232 are spaced apart and opposite each other in the second direction. In this embodiment, each arc-extinguishing chamber 231, the moving contact portion 2221, and the stationary contact portion 2232 are all located within the arc-initiating space. A permanent magnet 233 is provided at one end of the arc-initiating space, and the permanent magnet 233 forms an arc-initiating magnetic field within the arc-initiating space, which facilitates the introduction of the arc into the arc-extinguishing chamber 231. In this embodiment, the magnetic poles of the two permanent magnets 233 are in opposite directions, such as... Figure 22-30 As shown, the N pole of the permanent magnet 233 in the left arc-extinguishing system faces opposite directions to the N pole of the permanent magnet 233 in the right arc-extinguishing system, thus achieving a non-polar connection. Of course, the magnetic poles of the two permanent magnets 233 can also be aligned in the same direction as needed to achieve a polarized connection.

[0121] In addition, the magnetic plate 232 can be disposed inside the housing 21 or outside the housing 21. Figure 22-25 In the housing 21, a magnetic plate mounting groove 218 for assembling a magnetic plate 232 is provided on the outer shell 1. That is, a magnetic plate mounting groove 218 is provided on the outer surface of each support wall 2101. The area of ​​the magnetic plate mounting groove 218 covers the area where the arc-extinguishing chamber 231, the moving contact part 2221 and the stationary contact part 2232 cooperate. Each magnetic plate 232 is attached to the outer wall of the housing 21. A permanent magnet 233 is provided at one end of each magnetic plate mounting groove 218. In the figure, a permanent magnet 233 is provided above the magnetic plate mounting groove 218. The permanent magnet 233 extends through the housing 21 to the top of the arc-extinguishing chamber 231.

[0122] Each contact unit 2 also includes a current detection device. In the third direction, the current detection device is correspondingly set between a stationary contact 223 and an adjacent wiring assembly 24. The current detection device is connected to the adjacent stationary contact 223 or the moving contact assembly 220 at the closing position. A connecting circuit board 63 is connected between the control circuit board 6 and the current detection device. The connecting circuit board 63 transmits signals. The plane on which the connecting circuit board 63 is located is parallel to both the first direction and the third direction. The current detection device is directly connected to the adjacent stationary contact 223 or the moving contact assembly 220 at the closing position. The connecting circuit board 63 does not need to penetrate the contact unit 2 to connect to the control circuit board 6, which simplifies the wiring method between the current detection device and the control circuit board 6 and each contact unit 2. It has less interference with the internal structure of the contact unit 2, makes it easy to form a modular structure, and helps to reduce the assembly difficulty.

[0123] like Figure 22-28 As shown, the current detection device can be a manganese copper shunt 52. Preferably, the manganese copper shunt 52 is connected to the conductive plate 2231 of one of the stationary contacts 223, and the signal terminal of the manganese copper shunt 52 is connected to the connecting circuit board 63. Alternatively, the current detection device can be a Hall element. The acquisition terminal of the Hall element is connected to one of the stationary contacts 223, and the Hall element is connected to a transmission circuit board 511. The transmission circuit board 511 is connected to the connecting circuit board 63 for signal transmission. Of course, the manganese copper shunt 52 and the acquisition terminal of the Hall element can be connected to the moving contact assembly 220 located in the closed position, that is, connected to the moving contact bridge 222 located in the closed position.

[0124] like Figure 22 As shown, the current detection device is a manganese copper shunt 52. The manganese copper shunt 52 is connected to the conductive plate 2231 located between the housing 21 and the arc-extinguishing chamber 231. The signal end of the manganese copper shunt 52 passes through the side wall of the housing 21 and is connected to the connecting circuit board 63. In the figure, the signal end of the manganese copper shunt 52 passes through a connecting wall 2102 of the housing 21, so as to facilitate connection with the connecting circuit board 63.

[0125] like Figure 23-28As shown, the current detection device is a Hall element. In the third direction, the Hall element is located between a wiring assembly 24 and a contact mechanism, and the conductive plate 2231 of the stationary contact 223 and the Hall element are arranged along the first direction. The acquisition end of the Hall element is connected to a stationary contact 223. The Hall element is connected to a transmission circuit board 511, which is connected to a connection circuit board 63 for signal transmission. In the figure, the transmission circuit board 511 is fixedly connected to one end wall of the housing 21. A first positioning hole 2191 and a second positioning hole 2192 are provided on the end wall of the housing 21. The transmission circuit board 511 is connected to the housing 21 through the first positioning hole 2191, and the acquisition end of the Hall element is connected to the conductive plate 2231 of the stationary contact 223 through the second positioning hole 2192.

[0126] In this embodiment, the connecting circuit board 63 connecting the control circuit board 6 and the current sensor is arranged along the outside of the housing 21, and the plane where the connecting circuit board 63 is located is parallel to both the first direction and the third direction. It can also be understood that in the second direction, the connecting circuit board 63 is stacked on the outside of a support wall 2101 of the housing 21, and in the third direction, the connecting circuit board 63 is located between the contact mechanism and a wiring assembly 24. In this way, the connecting circuit board 63 is prevented from penetrating the contact unit 2 along the second direction, ensuring the independence of the wiring unit, which is conducive to forming a modular structure and facilitating assembly.

[0127] Specifically, such as Figure 24 As shown, the connecting circuit board 63 has a strip-shaped plate structure. The connecting circuit board 63 is located between the magnetic plate mounting groove 218 and a wiring assembly 24. The connecting circuit board 63 partially overlaps with the exhaust port 212 opened in the housing 21. The housing 21 is provided with a baffle 216 for partially blocking the exhaust port 212. In the second direction, the baffle 216 is stacked between the connecting circuit board 63 and the exhaust port 212 to prevent the exhaust gas discharged by the arc extinguishing system from interfering with the connecting circuit board 63. In the figure, in the first direction, the length of the connecting circuit board 63 is slightly greater than the length of the support wall 2101, so that one end of the connecting circuit board 63 is connected to the control circuit board 6, and the other end of the connecting circuit board 63 can be connected to the transmission circuit board 511 connected to the Hall element. A signal port 60 can be provided on the control circuit board 6, and an insertion port is opened in the area of ​​the housing 1 corresponding to the signal port 60.

[0128] Of course, such as Figure 6As shown, in the third direction, the connection circuit board 63 can also be located between a pair of wiring components 24. That is, in the second direction, the connection circuit board 63 is stacked with the contact mechanism, and the connection circuit board 63 is located outside the housing 21 and between two magnetic plate mounting slots 218 (magnetic plates 232). One end of the connection circuit board 63 extends along the first direction and connects to the control circuit board 6. The two edges of the other end of the connection circuit board 63 extend along the third direction towards the wiring components 24 to form extension plates. One of the extension plates can exceed a connecting wall 2102 of the housing 21. A signal port 60 can be provided at the extension plate. A socket is opened in the area of ​​the housing 1 opposite to the signal port 60. At this time, the signal port 60 and the socket are located at the wiring terminals of the housing 1. The other extension plate can be connected to the current detection device in the area of ​​the conductive plate 2231 corresponding to the stationary contact 223.

[0129] Of course, the connecting circuit board 63 can also be set in other positions outside the housing 21. The assembly position of the connecting circuit board 63 is relatively flexible, which not only facilitates the connection of the control circuit board 6, but also makes full use of the space inside the housing 1. In particular, the connecting circuit board 63 is set along the outside of the housing 21 of the contact unit 2, which avoids interference from the contact unit 2 to the connecting circuit board 63.

[0130] 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.

[0131] 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 (1), wherein at least one contact unit (2) and an electromagnetic operating system (3) for driving the contact unit (2) are disposed within the housing (1), the contact unit (2) comprising a contact mechanism, the contact mechanism comprising a moving contact assembly (220) and a stationary contact (223) cooperating with each other, the electromagnetic operating system (3) comprising a coil assembly and a moving assembly, the moving assembly being drivenly connected to the moving contact assembly (220), characterized in that: The moving component is also connected to an operating element (30) extending beyond the housing (1), which is driven by the coil assembly or the operating element (30) to move the moving component between a first position and a second position, thereby moving the moving contact assembly (220) toward or away from the stationary contact (223).

2. The switching device according to claim 1, characterized in that: The coil assembly includes a coil frame (31), with a magnet (32) at each of the opposite ends of the coil frame (31). Two coils (34) are wound around the outside of the coil frame (31) between the two magnets (32). The two coils (34) are distributed along the axial direction of the coil frame (31). A movable component is slidably assembled in the middle of the coil frame (31). The movable component includes a moving iron core (33). The movable component is attracted to one magnet (32) in a first position and to the other magnet (32) in a second position.

3. The switching device according to claim 2, characterized in that: The magnetic properties of the two magnets (32) are opposite at opposite ends. When energized, the magnetic properties of the two coils (34) are the same at adjacent ends. A repulsive force is generated between one magnet (32) and the adjacent coil (34), and a magnetic attraction force is generated between the other magnet (32) and the adjacent coil (34). The moving iron core (33) is driven by the repulsive force and the magnetic attraction force.

4. The switching device according to claim 2, characterized in that: It also includes two buffer plates (36) located between the magnet (32) and the moving iron core (33).

5. The switching device according to claim 2, characterized in that: The electromagnetic operating system (3) also includes a magnetic yoke (35), which is disposed around the outside of the coil assembly and has a through hole for the moving assembly to pass through.

6. The switching device according to claim 5, characterized in that: The magnetic yoke (35) includes two magnetic yoke plates, each magnetic yoke plate corresponding to one end of the coil frame (31) and surrounding the outside of a coil (34).

7. The switching device according to claim 1, characterized in that: The coil assembly includes a coil frame (31), a magnetic yoke (35) is arranged around the outer side of the coil frame (31), and two coils (34) are wound in the middle of the coil frame (31). The two coils (34) are distributed along the axial direction of the coil frame (31), and two magnets (32) are positioned between the two coils (34). The two magnets (32) form a symmetrical structure about the central axis of the coil frame (31) and can magnetize the magnetic yoke (35).

8. The switching device according to claim 7, characterized in that: Two magnets (32) have the same magnetic poles at opposite ends. When energized, the magnetic properties of adjacent ends of two coils (34) are opposite. The other end of one coil (34) has the same magnetic properties as the magnetized yoke (35), and the other end of the other coil (34) has the opposite magnetic properties to the magnetized yoke (35). The moving component includes a moving iron core (33), which is driven by the coils (34) and the magnetized yoke (35).

9. The switching device according to claim 7, characterized in that: Two magnet cavities (313) are provided on the outer side of the middle part of the coil frame (31), and a magnet (32) is assembled in each magnet cavity (313).

10. The switching device according to claim 9, characterized in that: A limiting boss (314) is provided inside the magnet cavity (313), and the limiting boss (314) abuts against and limits the magnet (32).

11. The switching device according to claim 7, characterized in that: The magnetic yoke (35) includes two spaced magnetic yoke plates, each magnetic yoke plate being attached to both ends of the coil frame (31). Each magnetic yoke plate has a through hole for the moving component to pass through. One of the magnetic yoke plates extends along the axial direction of the coil frame (31) to form two side plates. The two side plates are located on opposite sides of the coil frame (31) and are connected to the other magnetic yoke plate to form a closed frame structure.

12. The switching device according to claim 2 or 7, characterized in that: The moving component includes a moving iron core (33) and a drive rod (37). The moving iron core (33) is slidably disposed between two magnets (32). The drive rod (37) is connected to the moving iron core (33), and both ends of the drive rod (37) extend out of the coil frame (31) and are respectively linked to the operating component (30) and the moving contact assembly (220).

13. The switching device according to claim 12, characterized in that: One end of the drive rod (37) is connected to a linkage plate (4), which is linked to the moving contact assembly (220) of at least one contact unit (2).

14. The switching device according to claim 13, characterized in that: The drive rod (37) is provided with at least three clamping parts (38), each clamping part (38) is provided through the drive rod (37) along an axial direction perpendicular to the drive rod (37), and the operating part (30), the moving iron core (33) and the linkage plate (4) are respectively provided with at least one slot for limiting the clamping parts (38).

15. The switching device according to claim 1, characterized in that: It includes a contact unit (2), the moving contact assembly (220) includes a contact support (221) and a moving contact bridge (222) disposed on the contact support (221), the moving component being driven connected to the contact support (221).

16. The switching device according to claim 1, characterized in that: It includes at least two contact units (2) arranged side by side. The moving contact assembly (220) includes a contact support (221) and a moving contact bridge (222) disposed on the contact support (221). Two adjacent contact supports (221) are linked together. The moving component is driven to one of the contact supports (221), or the moving component is connected to a linkage plate (4). The linkage plate (4) is linked to the two contact supports (221) respectively.

17. The switching device according to claim 16, characterized in that: The contact unit (2) includes a housing (21), and the contact support (221) is provided with at least one linkage shaft (2211). The linkage shaft (2211) slides along the linkage groove (211) opened in the housing (21). The linkage plate (4) spans at least one contact unit (2). The linkage plate (4) is provided with a connection hole (41) for the linkage shaft (2211) to pass through. The moving contact assemblies (220) of two adjacent contact units (2) are linked together through the linkage shaft (2211).

18. The switching device according to claim 1, characterized in that: Each contact unit (2) also includes two arc extinguishing systems, which are respectively located on opposite sides of the contact mechanism.

19. The switching device according to claim 18, characterized in that: Each arc-extinguishing system includes an arc-extinguishing chamber (231) and a magnetizing component that works in conjunction with the arc-extinguishing chamber (231). The arc-entry end of the arc-extinguishing chamber (231) faces the contact mechanism, and the exhaust end of the arc-extinguishing chamber (231) is located at the end away from the contact mechanism. The magnetizing component includes two magnetic plates (232), which are spaced apart to form an arc-initiating space. Each arc-extinguishing chamber (231) is located in the arc-initiating space, and a permanent magnet (233) is provided at one end of the arc-initiating space. The permanent magnet (233) forms an arc-initiating magnetic field in the arc-initiating space.

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