Electromagnetic operating system and switching device

Abstract

An electromagnetic operating system and a switching device comprise a coil framework and a magnet yoke, the coil framework is provided with two magnets which are opposite to each other at intervals, a movable iron core is assembled in the middle of the coil framework in a sliding mode, the magnet yoke is arranged on the outer side of the coil framework in a surrounding mode, and two coils are wound around the middle of the coil framework. The two coils are distributed in the axial direction of the coil framework and used for driving the movable iron core to move between the first position and the second position, and at least one end of a driving rod connected to the movable iron core penetrates through the magnet yoke and extends out of the coil framework. According to the invention, the two coils are arranged on the coil framework, and the movable iron core is driven to move between the first position and the second position through the two coils, so that the driving process is simple, the reliability is high, and the cost is low.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to an electromagnetic operating system and a switch device. Background Art

[0002] A switch device is a device that controls the on and off of a circuit. With the increasing application and demand for intelligent switches, existing intelligent switches are usually equipped with electric operating mechanisms to achieve remote control. However, since most electric operating mechanisms are driven by motors and gear sets, their control schemes are complex, costly, and occupy a large space, which cannot meet the miniaturization requirements of switch devices. Summary of the invention

[0003] The object of the present invention is to overcome at least one defect of the prior art and to provide an electromagnetic operating system and a switch device with simple structure, high reliability and low cost.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides an electromagnetic operating system, including a coil frame and a yoke, wherein the coil frame is provided with two magnets spaced opposite to each other, a moving iron core is slidably mounted in the middle of the coil frame, the yoke is surrounded and arranged on the outside of the coil frame, two coils are wound around the middle of the coil frame, the two coils are distributed along the axial direction of the coil frame and are used to drive the moving iron core to move between a first position and a second position, and at least one end of a driving rod connected to the moving iron core passes through the yoke and extends out of the coil frame.

[0006] Preferably, the two magnets are respectively arranged at opposite ends of the coil frame, and the magnetism of the opposite ends of the two magnets is opposite. When the power is on, the magnetism of the adjacent ends of the two coils is the same.

[0007] Preferably, in a power-on state, a repulsive force is generated between one magnet and an adjacent coil, and a magnetic attraction force is generated between another magnet and an adjacent coil, and the moving iron core is driven by both the repulsive force and the magnetic attraction force.

[0008] Preferably, the moving iron core is attracted to one magnet at a first position, and is attracted to another magnet at a second position.

[0009] Preferably, when the moving iron core remains attracted to one of the magnets, the two coils stop being energized.

[0010] Preferably, the axial length of the moving iron core is greater than the axial length of each coil.

[0011] Preferably, it further comprises two buffer plates, wherein the buffer plates are located between the magnet and the moving iron core.

[0012] Preferably, the coil frame is further provided with a partition, which is protruding along the outer side of the middle part of the coil frame and separates the two coils by the partition.

[0013] Preferably, the coil skeleton includes two spaced-apart retaining walls, a hollow winding shaft is connected between the two retaining walls, a receiving groove is provided in the middle of the surface of each retaining wall facing away from the winding shaft, a moving iron core is provided in the hollow part of the winding shaft as a sliding cavity, at least one end of the sliding cavity is connected to the receiving groove, a partition is protruding from the middle outer wall of the winding shaft, the partition divides the space between the two retaining walls into two receiving cavities, and a limiting groove is provided in the partition.

[0014] Preferably, the yoke includes two yoke plates, each yoke plate includes a first straight plate and two second straight plates, the first straight plate is correspondingly covered on a magnet, the two second straight plates are respectively arranged on opposite sides of the coil frame, one end of each second straight plate is connected to one end of the first straight plate, and the other end of each second straight plate is bent and extended toward the middle of the coil frame, so that each yoke plate cooperates with the coil frame to form a coil installation cavity, and a through hole is opened on at least one of the first straight plates.

[0015] Preferably, a limiting groove is provided on the outer side of the middle part of the coil skeleton, and the other end of each second straight plate extends into the limiting groove and is limited by the limiting groove.

[0016] Preferably, two magnets are disposed between the two coils, and the two magnets form a symmetrical structure with respect to the central axis of the coil skeleton and are capable of magnetizing the yoke.

[0017] Preferably, the magnetic poles at opposite ends of the two magnets are the same, and 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 opposite magnetism to the magnetized yoke, and the moving iron core is driven jointly by the coil and the magnetized yoke.

[0018] Preferably, two magnet cavities are arranged on the outer side of the middle part of the coil frame, and a magnet is installed in each magnet cavity.

[0019] Preferably, a limiting boss is provided in the magnet cavity, and the limiting boss abuts against the magnet for limiting position.

[0020] Preferably, the magnet cavity is an irregular cavity.

[0021] Preferably, the yoke includes two yoke plates arranged at intervals, each yoke plate is respectively fitted on both ends of the coil frame, each yoke plate is provided with a through hole for the moving component to pass through, and the two ends of one of the yoke plates extend along the axial direction of the coil frame to form two side plates, the two side plates are located on opposite sides of the coil frame and are connected to the other yoke plate to form a closed frame structure.

[0022] Preferably, the moving iron core and the driving rod are an integrated structure, and the moving iron core and the driving rod are made of magnetic conductive material.

[0023] The present invention provides a switch device, comprising at least one contact unit, each contact unit comprising a contact mechanism, the contact mechanism comprising a moving contact assembly and two stationary contacts, and also comprising the electromagnetic operating system as described above, the electromagnetic operating system being drive-connected to the moving contact assembly of at least one contact unit.

[0024] The electromagnetic operating system and switch device of the present invention have two coils arranged on their coil frame, and the two coils drive the moving iron core to move between the first position and the second position. Compared with the existing structure using a motor and a gear set, it has the advantages of simple driving process, high reliability and low cost.

[0025] In addition, two magnets are respectively arranged at both ends of the coil frame, and the magnetism of the opposite ends of the two magnets is opposite. When the power is on, the magnetism of the adjacent ends of the two coils is the same. Each magnet can cooperate with the adjacent magnets to make the moving iron core receive a stable driving force, which is beneficial to improve the overall reliability. Alternatively, two magnets are limitedly arranged between the two coils. When the power is on, the magnetism of the adjacent ends of the two coils is opposite. The moving iron core is driven by the magnet and the magnetized yoke together, which is beneficial to simplify the structure of the electromagnetic operating system.

[0026] In addition, the axial length of the moving iron core is greater than the axial length of each coil, which reduces the moving stroke of the moving iron core and ensures the driving force of the coil on the moving iron core.

[0027] In addition, a partition is provided in the middle of the coil frame, and the two coils are separated by the partition. In particular, a limiting groove that can limit the magnetic yoke is opened in the partition to ensure the matching stability of the entire mechanism.

[0028] In addition, a buffer plate is provided between the moving iron core and the magnet to prevent the moving iron core from directly impacting the magnet, thereby helping to extend the service life of the electromagnetic operating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the structure of the switch device of the present invention after the cover is removed;

[0030] Figure 2It is a schematic diagram of the coordination of the control circuit board, the electromagnetic operating system, the current detection device and the contact unit in the present invention;

[0031] Figure 3 It is a schematic diagram of the cooperation between the contact unit and the electromagnetic operating system in the present invention;

[0032] Figure 4 It is a schematic diagram of the coordination between the electromagnetic operating system and the moving contact assembly in the present invention;

[0033] Figure 5 It is a schematic diagram of the coordination between multiple contact units and linkage plates in the present invention;

[0034] Figure 6 It is an exploded schematic diagram of multiple contact units and linkage plates in the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the electromagnetic operating system in the present invention;

[0036] Figure 8 is a cross-sectional view of the electromagnetic operating system of the present invention;

[0037] Fig. 9 Schematic diagram of the coordination of the coil, the moving iron core and the magnet in the present invention (first position);

[0038] Fig.10 Schematic diagram of the coordination of the coil, the moving iron core and the magnet in the present invention (second position);

[0039] Fig.11 is a cross-sectional view of a second electromagnetic operating system of the present invention;

[0040] Fig.12 It is a schematic diagram of a coil skeleton and a driving rod in a second electromagnetic operating system of the present invention;

[0041] Fig.13 is a cross-sectional view (at the magnet) of the second electromagnetic operating system of the present invention;

[0042] Fig.14 It is a schematic diagram of the coordination of the coil, the moving iron core and the magnet in the second electromagnetic operating system of the present invention (first position);

[0043] Fig.15 It is a schematic diagram of the coordination of the coil, the moving iron core and the magnet in the second electromagnetic operating system of the present invention (second position);

[0044] Fig.16 It is a schematic diagram of the structure of the contact unit and the manganese-copper shunt in the present invention;

[0045] Fig.17 It is a schematic diagram of the structure of the contact unit and the Hall element in the present invention;

[0046] Fig.18 It is a schematic diagram of the coordination of the contact unit, the Hall element and the connection circuit board in the present invention;

[0047] Fig.19 It is a structural schematic diagram of the connection housing in the present invention;

[0048] Fig. 20 It is a schematic diagram of the internal structure of the contact unit in the present invention;

[0049] Fig.21 yes Fig. 20 The main view;

[0050] Fig. 22 yes Fig. 20 The main view;

[0051] Fig.23 is a cross-sectional view of a contact unit in the present invention;

[0052] Fig.24 is a cross-sectional view of the contact unit in the present invention (the exhaust port is provided with a baffle);

[0053] Reference numerals:

[0054] 1-housing, 10-assembly cavity, 11-base, 12-cover, 13-partition, 14-connection port, 2-contact unit, 21-housing, 2101-support wall, 2102-connection wall, 2103-end wall, 211-linkage groove, 212-exhaust port, 213-first barrier, 214-second barrier, 215-insulating plate, 216-baffle, 217-isolation groove, 21 8-magnetic plate mounting groove, 2191-first positioning hole, 2192-second positioning hole, 220-moving contact assembly, 221-contact support, 2211-linkage shaft 2211, 2212-isolation plate, 222-moving contact bridge, 2221-moving contact part, 223-static contact, 2231-conductive plate, 2232-static contact part, 230-exhaust channel 230, 231-arc extinguishing chamber 2 31, 232-magnetic plate, 233-permanent magnet, 234-moving arc-starting plate, 235-static arc-starting plate, 24-wiring assembly, 3-electromagnetic operating system, 30-operating member, 31-coil skeleton, 310-partition, 311-blocking wall, 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-yoke, 351-first straight plate, 352-second straight plate, 36-buffer plate, 37-driving rod, 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-distribution circuit board, 63-connection circuit board. DETAILED DESCRIPTION

[0055] The following is a further description of the specific implementation of the electromagnetic operating system and the switch device of the present invention in conjunction with the embodiments given in the accompanying drawings. The electromagnetic operating system and the switch device of the present invention are not limited to the description of the following embodiments.

[0056] The switch device includes a shell 1, in which an electromagnetic operating system 3 and at least one contact unit 2 are arranged. The electromagnetic operating system 3 is connected to a control circuit board 6 arranged in the shell 1. The control circuit board 6 is provided with a controller for controlling the electromagnetic operating system 3. The electromagnetic operating system 3 drives the contact unit 2 to open and close. That is, when there is one contact unit 2 arranged in the shell 1, the electromagnetic operating system 3 directly or indirectly drives the contact unit 2. When at least two contact units 2 are arranged in the shell 1, the electromagnetic operating system 3 is directly or indirectly driven and connected to one of the contact units 2. Two adjacent contact units 2 are linked and connected so as to be indirectly driven by the electromagnetic operating system 3, thereby realizing synchronous opening and closing of multiple contact units 2.

[0057] Specifically, each contact unit 2 includes at least a pair of wiring assemblies 24 and a contact mechanism, and the contact mechanism is arranged between the pair of wiring assemblies 24. The contact mechanism includes a moving contact assembly 220 and two static contacts 223. The moving contact assembly 220 of at least one contact unit 2 is directly or indirectly driven and connected to the electromagnetic operating system 3, and the moving contact assemblies 220 of two adjacent contact units 2 are linked and connected, and the driving method adopts the existing technology. The contact mechanism is arranged between a pair of wiring assemblies 24, and each static contact 223 is respectively connected to the adjacent wiring assembly 24, one of which is used for outgoing lines, and the other wiring assembly 24 is used for incoming lines.

[0058] Furthermore, the contact unit 2 also includes two arc extinguishing systems, each of which is arranged on one side of the contact mechanism to extinguish the arc generated when the contact mechanism is disconnected. In addition, the contact unit 2 can also include a current detection device, which is connected to the main line of each contact unit 2. The current detection device is connected to the control circuit board 6 for feedback of the collected current signal.

[0059] The electromagnetic operating system 3 includes a coil assembly, a yoke 35 and a moving assembly, wherein the coil assembly includes a coil frame 31, the yoke 35 is surrounded and arranged on the outside of the coil frame 31, and the moving assembly at least includes a moving iron core 33, which is slidably arranged in the middle of the coil frame 31. The moving iron core 33 moves between a first position and a second position under the drive of the coil assembly, and two magnets 32 are arranged on the coil frame 31. The moving iron core 33

[0060] For the convenience of description, the moving direction of the moving component in the electromagnetic operating system 3 is taken as the first direction. Figure 1 , 5 In the example, the direction of the Y axis is the first direction, and the two directions perpendicular to the first direction are the second direction and the third direction. The second direction and the third direction are perpendicular to each other. Figure 1 , 5 In the embodiment, 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 arranged in the housing 1, two adjacent contact units 2 are arranged in parallel along the second direction, and a pair of wiring components 24 in each contact unit 2 are arranged at intervals along the third direction, that is, the connecting line between a pair of wiring components 24 is parallel to the third direction.

[0061] The improvement of the present application lies in that two coils 34 are wound around the middle of the coil frame 31, and the two coils 34 are distributed along the axial direction of the coil frame 31 to drive the moving iron core 33 to move between the first position and the second position, and at least one end of the driving rod 37 connected to the moving iron core 33 passes through the yoke 35 and extends out of the coil frame 31.

[0062] Thus, two coils 34 are arranged on the coil assembly, and the moving iron core 33 is driven to move between the first position and the second position by the two coils 34. Compared with the existing structure using a motor and a gear set, it has the advantages of simple driving process, high reliability and low cost.

[0063] Preferably, the two magnets 32 are respectively arranged at opposite ends of the coil frame 31, and the opposite ends of the two magnets 32 have opposite magnetic properties. When the power is on, the adjacent ends of the two coils 34 have the same magnetic properties, so that a repulsive force is generated between the two coils 34. Each magnet 32 ​​cooperates with the adjacent coil 34 to drive the moving iron core 33 together, so that the moving iron core 33 obtains a stable driving force, thereby improving the overall reliability.

[0064] Furthermore, the moving iron core 33 is attracted to one magnet 32 ​​at the first position and to another magnet 32 ​​at the second position. Meanwhile, the two magnets 32 are attracted to the moving iron core 33 at the first position and the second position respectively, thereby ensuring driving stability.

[0065] Furthermore, the electromagnetic operating system 3 also includes two buffer plates 36 , each buffer plate 36 is located between the magnet 32 ​​and the moving iron core 33 , and the buffer plate 36 buffers the impact of the moving iron core 33 on the magnet 32 ​​, thereby extending the service life of the electromagnetic operating system 3 .

[0066] Preferably, two magnets 32 are limitedly arranged between the two coils 34, and the two magnets 32 form a symmetrical structure about the central axis of the coil skeleton 31, and the two magnets 32 are also used to magnetize the yoke 35. In particular, the magnetic poles of the opposite ends of the two magnets 32 are the same. When the power is on, the magnetism of the adjacent ends of the two coils 34 is opposite, the other end of one coil 34 is the same as the magnetized yoke 35, and the other end of the other coil 34 is opposite to the magnetism of the magnetized yoke 35. The moving iron core 33 is driven jointly by the coil 34 and the magnetized yoke 35, which is conducive to simplifying the structure of the electromagnetic operating system 3.

[0067] Combination Figure 1-24 A specific embodiment of a switch device is provided.

[0068] like Figure 1-3As shown, the switch device includes a housing 1, in which an electromagnetic operating system 3 and at least one contact unit 2 are arranged, wherein the electromagnetic operating system 3 and the contact unit 2 are arranged in the housing 1 along a first direction, when there are at least two contact units 2 in the housing 1, the two contact units 2 are arranged in parallel in the second direction, in this embodiment, four contact units 2 arranged in parallel in the second direction are arranged in the housing 1, each contact unit 2 includes a pair of wiring components 24, a contact mechanism and two arc extinguishing systems, wherein a pair of wiring components 24 are arranged at intervals in a third direction, the contact mechanism is arranged between a pair of wiring components 24, and an arc extinguishing system is arranged between the contact mechanism and a wiring component 24, and the arc extinguishing system cooperates to extinguish the arc generated when the contact mechanism is opened.

[0069] like Figure 1 As shown, both ends of the housing 1 are respectively used as wiring terminals, the connection line between the two wiring terminals is parallel to the third direction, the middle part of the housing 1 between the two wiring terminals protrudes outward along the first direction to form an operating end, the operating end is provided with a driving hole, and an operating member 30 is arranged in the driving hole. The housing 1 includes a base 11 and a cover 12, wherein the cover 12 covers the base 11 in the first direction, the driving hole is opened on the cover 12, and three partitions 13 are arranged in the base 11, and two adjacent partitions 13 are arranged at intervals in the second direction, and the partitions 13 divide the space in the base 11 into four assembly cavities (assembly cavities The number of contacts matches the number of contact units, and this embodiment is for illustration only), a contact unit 2 is arranged in each assembly cavity, and a wiring cavity is formed corresponding to the same end of all assembly cavities, and a wiring port 14 is provided in the wiring cavity; the electromagnetic operating system 3 and the control circuit board 6 are arranged between the base 11 and the cover body 12, that is, in the first direction, they are located between the contact unit 2 and the cover body 12, and the electromagnetic operating system 3 and the control circuit board 6 correspond to the inside of the operating end of the housing 1, and an avoidance notch is provided on the edge of each partition 13 close to the electromagnetic operating system 3 to avoid interfering with the action of the electromagnetic operating system 3.

[0070] like Figure 1-3 As shown, 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 along the second direction. Specifically, when two contact units 2 are provided in the housing 1, the control circuit board 6 spans all the contact units 2 in the second direction. When three or more contact units are provided in the housing 1, the control circuit board 6 spans one or two of the contact units 2 (assembly cavities), preferably spans one or two contact units 2 (assembly cavities) located in the middle position.

[0071] Preferably, the control circuit board 6 is divided into at least two sub-circuit boards 61, and the two sub-circuit boards 61 are respectively located on opposite sides of the electromagnetic operating system 3, or the two sub-circuit boards 61 are respectively located on the same side of the electromagnetic operating system 3, which is conducive to the dispersed assembly of the control circuit board 6 to meet the switching device with different needs and has strong applicability.

[0072] Specific as Figure 3 As shown, when two sub-circuit boards are respectively located on opposite sides of the electromagnetic operating system 3, if a contact unit 2 is provided in the shell 1, the plane where each sub-circuit board 61 is located is parallel to the first direction and the third direction at the same time. At this time, the sub-circuit board 61 is in contact with the inner wall of the shell 1 in the second direction, so that the space occupied by the sub-circuit board 61 in the second direction can be avoided, which is conducive to reducing the thickness of the switch device; if at least two contact units 2 are provided in the shell 1, preferably, the plane where each sub-circuit board 61 is located is parallel to the first direction and the second direction at the same time. At this time, each sub-circuit board 61 can cross one or two contact units 2 in the second direction, that is, when two contact units 2 are provided in the shell 1, the sub-circuit board 61 crosses all the contact units 2, and when three or more contact units 2 are provided in the shell 1, the sub-circuit board 61 crosses one or two of the contact units 2, so as to facilitate the wiring of the sub-circuit board 61 with each contact unit 2.

[0073] like Figure 3 As shown, in the third direction, two sub-circuit boards 61 can also be arranged on the same side of the electromagnetic operating system 3, and the two sub-circuit boards 61 are connected at an angle. In the figure, the two sub-circuit boards 61 are connected vertically to each other, one of the sub-circuit boards 61 is closer to the electromagnetic operating system 3, and its plane is parallel to the first direction and the second direction at the same time, and the plane of the other sub-circuit board 61 is parallel to the second direction and the third direction at the same time. Such a structure is suitable for at least two contact units 2 to be arranged in the housing 1. Of course, the control circuit board 6 can also be an integrated structure, and its assembly position with the electromagnetic operating system 3 can refer to the setting position of any sub-circuit board 61, but it may occupy more space in the housing 1. In addition, a signal port 60 can be arranged on the control circuit board 6, and a socket is opened in the housing 1 area corresponding to the signal port 60. The signal port 60 and the socket can be located on the operating end of the housing 1. Of course, the signal port 60 can also be arranged at other positions of the housing 1.

[0074] like Figure 4 , 7-10, the electromagnetic operating system 3 includes a coil assembly, a yoke 35 and a moving assembly, wherein the coil assembly is connected to a control circuit board 6 disposed in the housing 1, and a control signal is output by a controller of the control circuit board 6, and the moving assembly is driven to move between a first position and a second position by controlling the current of the coil assembly, and the coil assembly includes a coil skeleton 31, a yoke 35 is disposed around the outer side of the coil skeleton 31, and two coils 34 are wound around the middle of the coil skeleton 31, and the two coils 34 are distributed along the axial direction of the coil skeleton 31, that is, the two coils 34 are distributed along the first direction, and each coil 34 is respectively connected to the control circuit board 6. In this embodiment, each coil 34 can be connected to a corresponding sub-circuit board 61, and the controller of the control circuit board 6 controls whether the coil 34 is energized and whether the power is on. flow direction; the coil skeleton 31 is also equipped with two magnets 32, and the two magnets 32 can be respectively arranged at the opposite ends of the coil skeleton 31, or the magnets 32 are correspondingly arranged in the middle of the coil skeleton 31 and located between the two coils 34, the magnets 32 can magnetize the adjacent yokes 35, and a moving component is slidably assembled in the middle of the coil skeleton 31, and the coil component drives the moving component to move between the first position and the second position, that is, if the two magnets 32 are arranged at the two ends of the coil skeleton 31, the magnets 32 and the coils 34 jointly drive the moving component, so that the moving component is attracted to one magnet 32 ​​at the first position and attracted to the other magnet 32 ​​at the second position; if the two magnets 32 are located between the two coils 34, the magnets 32 and the magnetized yokes 35 jointly drive the moving component.

[0075] The moving component includes a moving iron core 33, wherein the moving iron core 33 is slidably arranged in the middle of the coil frame 31, that is, the moving iron core 33 is located between the two magnets 32. When the power is on, the two coils 34 drive the moving iron core 33 to move between the first position and the second position. At least one end of the driving rod 37 connected to the moving iron core 33 passes through the magnet 32 ​​and extends out of the coil frame 31, and is directly or indirectly driven and connected to the moving contact assembly 220 of at least one contact unit 2 by the driving rod 37.

[0076] Furthermore, the moving component also includes a driving rod 37, which is connected to the moving iron core 33 and is driven by the moving iron core 33 to move axially along the coil frame 31, and at least one end of the driving rod 37 passes through one of the magnets 32 and extends out of the coil frame 31, and is used to connect with the moving contact assembly 220 of at least one contact unit 2, so as to realize 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 opened, and when the moving component moves to the second position, the contact mechanism of the contact unit 2 is closed.

[0077] Furthermore, the electromagnetic operating system 3 also includes two buffer plates 36, each buffer plate 36 is arranged between the moving iron core 33 and a magnet 32. Preferably, each buffer plate 36 is correspondingly arranged at one end of the coil frame 31, and the buffer plate 36 is correspondingly 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 is beneficial to extending the service life.

[0078] In addition, the electromagnetic operating system 3 also includes a yoke 35, which is arranged around the outer side of the coil frame 31. The yoke 35 is provided with a through hole for the driving rod 37 to pass through. The through hole provided on the yoke 35 corresponds to the through hole provided on the magnet 32. Preferably, the yoke 35 includes two yoke plates, each of which is correspondingly arranged around one end of the coil frame 31 and around the outer side of a coil 34.

[0079] Combination Figure 4-15 Provide a specific structure of the first electromagnetic operating system 3, such as Figure 7 , 8 As shown, the electromagnetic operating system 3 includes a coil component and a moving component, wherein the coil component includes a coil frame 31. In the figure, the coil frame 31 includes two spaced retaining walls 311, a hollow winding shaft 312 is connected between the two retaining walls 311, a receiving groove is provided in the middle of the surface of one side of each retaining wall 311 facing away from the winding shaft 312, the bottom of each receiving groove is connected to the hollow part of the winding shaft 312, a buffer plate 36 and a magnet 32 ​​are provided in each receiving groove, corresponding through holes are provided in the middle of the buffer plate 36 and the magnet 32, and the winding shaft 312 The hollow part serves as a sliding cavity, and the through holes of the buffer plate 36 and the magnet 32 ​​are coaxial with the sliding cavity; a partition 310 is also provided in the middle of the coil skeleton 31, and the partition 310 protrudes along the outer side of the middle part of the coil skeleton 31, that is, a partition 310 is protruded on the outer wall of the middle part of the winding shaft 312, and the partition 310 divides the space between the two retaining walls 311 into two accommodating cavities. The partition 310 divides the middle part of the coil skeleton 31 into two parts. Preferably, a limiting groove is opened on the partition 310, and the limiting groove is preferably opened along the circumferential direction of the partition 310.

[0080] A magnetic yoke 35 is disposed around the coil assembly. Figure 7 , 8As shown, the yoke 35 includes two yoke plates, each of which includes a first straight plate 351 and two second straight plates 352, wherein the first straight plate 351 is correspondingly covered on a magnet 32, and the two second straight plates 352 are respectively arranged on opposite sides of the coil skeleton 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 skeleton 31, and preferably, the other end of each second straight plate 352 is inserted and limited in the limiting groove of the partition 310 to ensure the overall matching stability of the mechanism, so that each yoke plate encloses the accommodating cavity to form a coil installation cavity, and two coils 34 are wound on the winding shaft 312, each coil 34 is correspondingly located in a coil installation cavity, and the two coils 34 are separated by the partition 310, and at least one of the first straight plates 351 is provided with a through hole coaxial with the sliding cavity. In this embodiment, the middle parts of the two first straight plates 351 are both provided with through holes.

[0081] The moving assembly includes a moving iron core 33 and a driving rod 37, wherein the moving iron core 33 is slidably assembled in the sliding cavity, and a driving rod 37 is arranged in the middle of the moving iron core 33, wherein two ends of the driving rod 37 extend out from the through holes of the buffer plate 36 and the magnet 32 ​​respectively, and the moving iron core 33 and the driving rod 37 are both made of magnetic conductive material, and the moving iron core 33 and the driving rod 37 can be an integral structure or two separate components. In the present embodiment, the driving rod 37 and the moving iron core 33 are two separate components, and a clamping piece is arranged in the middle of the driving rod 37. Preferably, the clamping piece is arranged on the driving rod 37 along an axial direction perpendicular to the driving rod 37, and a through groove for the driving rod 37 to pass through is opened in the middle of the moving iron core 33, and a clamping groove for limiting the clamping piece is arranged in the through groove.

[0082] In this structure, the opposite ends of the two magnets 32 have opposite magnetic properties. When powered on, the adjacent ends of the two coils 34 have the same magnetic properties. A repulsive force is generated between one magnet 32 ​​and the adjacent coil 34, and a magnetic attraction is generated between the other magnet 32 ​​and the adjacent coil 34. The moving iron core 33 is driven by both the repulsive force and the magnetic attraction, so that the driving force for the movement of the moving iron core 33 is reliably guaranteed.

[0083] The specific principle is as follows Fig. 9 , 10 As shown, the upper position in the figure is the first position, and the lower position in the figure is the second position, wherein the magnet 32 ​​close to the first position is the first magnet 321, and the magnet 32 ​​close to the second position is the second magnet 322, the coil 34 close to the first position is the first coil 341, and the coil 34 close 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.

[0084] When the second current is applied, the magnetic pole at one end adjacent to the first coil 341 and the second coil 342 is an S pole, and the end of the first coil 341 facing the first magnet 321 is an N pole, and the N poles of the first magnet 321 and the first coil 341 are opposite, so that a repulsive force is generated between the two. The end of the second coil 342 facing the second magnet 322 is an N pole, and the N pole and S pole of the second magnet 322 and the second coil 342 are opposite, so that a magnetic attraction is generated between the two. The moving iron core 33 is driven away from the first magnet 321 by the repulsive force, and is driven close to the second magnet 322 by the magnetic attraction and remains attracted to the second magnet 322.

[0085] When the first current is passed, the magnetic pole at one end adjacent to the first coil 341 and the second coil 341 is the N pole, and the end of the first coil 341 facing the first magnet 321 is the S pole. The N pole and S pole of the first magnet 321 and the first coil 341 are opposite to each other, and a magnetic attraction force is generated between the two. The end of the second coil 342 facing the second magnet 322 is the S pole. The S pole of the second coil 342 and the second magnet 322 are opposite to each other, and a repulsive force is generated between the two. The moving iron core 33 moves away from the second magnet 322 under the action of the repulsive force, and approaches the first magnet 321 and remains attracted to the first magnet 321 under the action of the magnetic attraction force, wherein the first current is in opposite directions to the second current.

[0086] Preferably, when the moving iron core 33 remains attracted to one of the magnets 32, the two coils 34 are de-energized, which is beneficial to 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.

[0087] Combination Figure 11-15 A specific structure of a second electromagnetic operating system 3 is provided.

[0088] The electromagnetic operating system 3 includes a coil assembly, a yoke 35 and a moving assembly. The coil assembly includes a coil frame 31. The yoke 35 is surrounded and arranged on 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 limitedly arranged between the two coils 34. That is, the two magnets 32 are respectively corresponding to the opposite sides of the middle of the coil frame 31 for magnetizing the yoke 35, and in the axial direction of the coil frame 31, the magnet 32 ​​is 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.

[0089] In the present structure, the coil skeleton 31 includes two spaced-apart retaining walls 311, a hollow winding shaft 312 is connected between the two retaining walls 311, the middle of each retaining wall 311 is respectively connected to the hollow part of the winding shaft 312, the hollow part of the winding shaft 312 serves as a sliding cavity, and a protrusion is also provided in the middle of the coil skeleton 31, the protrusion is protruding along the outer side of the middle part of the coil skeleton 31, that is, a protrusion is protruding on the outer wall of the middle part of the winding shaft 312, the protrusion divides the space between the two retaining walls 311 into two accommodating cavities, and a magnet cavity 313 is formed inside each protrusion, and a magnet 32 ​​is arranged in each magnet cavity 313. Preferably, the cavity shape of the two magnet cavities 313 is irregular, so as to realize the anti-fool function, and further, a limiting boss 314 is provided in the magnet cavity 313, and the limiting boss 314 can abut against the magnet 32 ​​to limit the magnet 32.

[0090] The yoke 35 includes two yoke plates arranged at intervals, each of which is respectively fitted on the two ends of the coil frame 31. Each yoke plate is provided with a through hole for the moving component to pass through, and the through hole is connected to the sliding cavity. The two ends of one of the yoke plates extend along the axial direction of the coil frame 31 to form two side plates, and the two side plates are located on opposite sides of the coil frame 31 and connected to the other yoke plate, so that the yoke 35 as a whole forms a closed frame structure.

[0091] The moving assembly is the same as the moving assembly of the first electromagnetic operating system 3, and includes a moving iron core 33 and a driving rod 37, wherein the moving iron core 33 is slidably assembled in the sliding cavity, and a driving rod 37 is provided in the middle of the moving iron core 33, wherein the two ends of the driving rod 37 extend out from the through holes of the yoke 35 respectively, and the driving rod 37 is also provided with a clamping member 38. Compared with the first electromagnetic operating system 3, the present structure can omit the buffer plate 36, and at the same time simplifies the structure of the yoke 35, and correspondingly increases the magnetic field strength of the yoke 35.

[0092] In this structure, the opposite ends of the two magnets 32 have the same magnetic properties. When powered on, the adjacent ends of the two coils 34 have opposite magnetic properties. 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 opposite magnetic properties to the magnetized yoke 35. The moving iron core 33 is driven jointly by the coil 34 and the magnetized yoke 35.

[0093] The specific principle is as follows Fig.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, wherein the magnet 32 ​​on the left is the first magnet 321, the magnet 32 ​​on the right is the second magnet 322, the coil 34 close to the first position is the first coil 341, and the coil 34 close to 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.

[0094] When the second current is applied, the magnetic pole at one end adjacent to the first coil 341 and the second coil 342 is an S pole, the magnetic pole at the other end of the first coil 341 is an N pole, and the magnetic pole at the other end of the second coil 342 is an S pole. After the yoke 35 is magnetized, the magnetic pole on the side facing the first coil 341 and the second coil 342 is an N pole, and a repulsive force is generated between the yoke 35 and the first coil 341, and a magnetic attraction force is generated between the yoke 35 and the second coil 342, thereby driving the moving iron core 33 away from the first coil 341, that is, the moving iron core 33 moves to the second position;

[0095] When the first current is applied, the magnetic pole at one end adjacent to the first coil 341 and the second coil 341 is the N pole, the magnetic pole at the other end of the first coil 341 is the S pole, and the magnetic pole at the other end of the second coil 342 is the N pole. After the yoke 35 is magnetized, the magnetic property on the side facing the first coil, 341, and the second coil 342 is the N pole, and a magnetic attraction force is generated between the yoke 35 and the first coil 341, and a repulsive force is generated between the yoke 35 and the second coil 342, thereby driving the moving iron core 33 to approach the first coil 341, that is, the moving iron core 33 moves to the first position.

[0096] When the electromagnetic operating system 3 drives more than one contact unit 2, the mobile component can be directly driven and connected to one of the contact units 2, and the remaining contact units 2 are connected through linkage, so 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 mobile component, and multiple contact units 2 are respectively linked to the linkage plate 4, and all contact units 2 are driven by the same linkage plate 4, which is conducive to ensuring the synchronization of the actions of the contact units 2.

[0097] In this embodiment, a clamping piece is provided at one end of the driving rod 37, and a clamping groove for the position-limiting clamping piece is provided on the linkage plate 4. Specifically, the linkage plate 4 includes a plate-shaped linkage body, and the two ends of the linkage body are bent toward the same side to form a pair of spaced and opposite linkage walls, and a connecting hole 41 is provided on each linkage wall. A linkage hole 42 is provided in the middle of the linkage body, and one end of the driving rod 37 passes through the linkage hole 42. A clamping groove for the position-limiting clamping piece is provided at one end of the linkage body that is opposite to the electromagnetic operating system 3. Of course, the connection method of the driving rod 37 with the moving iron core 33 and the linkage plate 4 can also adopt other fastening structures, such as bonding, threaded connection, etc.

[0098] In this embodiment, at least two contact units 2 are arranged in parallel 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, and the linkage shaft 2211 passes through the connecting hole 41 for linkage connection with the linkage plate 4. Preferably, the linkage hole 42 is located between the 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 arranged in the housing 1, in the second direction, the linkage plate 4 corresponds to spanning a contact unit 2 or two contact units 2 located in the middle position, and 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.

[0099] In this embodiment, each contact unit 2 includes a pair of wiring assemblies 24 spaced apart in the third direction, a contact mechanism is arranged 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, wherein the moving contact bridge 222 is arranged on the contact support 221, and the moving trajectory of the moving contact bridge 222 is perpendicular to the connecting line between the pair of connecting line assemblies 24, that is, the central axis of the moving contact bridge 222 is parallel to the third direction, and two moving contact parts 2221 are respectively provided at both ends of the moving contact bridge 222, and the moving contact assembly 220 moves along the first direction under the drive of the moving assembly, so that each moving contact part 2221 is respectively matched with the stationary contact part 2232 of a stationary contact 223, and each stationary contact 223 is respectively electrically connected to an adjacent wiring assembly 24.

[0100] Each contact unit 2 further includes a current detection device, which is connected to a control circuit board 6 disposed in the housing 1, wherein the control circuit board 6 and the contact unit 2 are disposed along a first direction, and in a third direction, the current detection device is disposed between a stationary contact 223 and an adjacent wiring assembly 24, and the current detection device is connected to an adjacent stationary contact 223 or a moving contact assembly 220 in a closed position, and the current detection device is connected to the control circuit board 6 through a connecting circuit board 63, and the plane where the connecting circuit board 63 is located 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, and the current detection device is directly connected to an adjacent stationary contact 223 or a moving contact assembly 220 in a closed position, and the connecting circuit board 63 does not need to penetrate the contact unit 2 to connect with 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, has less interference with the internal structure of the contact unit 2, and is easy to form a modular structure, which is conducive to reducing the difficulty of assembly.

[0101] Preferably, each contact unit 2 also includes a shell 21, wherein the contact mechanism is arranged in the shell 21, and each wiring assembly 24 is correspondingly arranged outside one end of the shell 21, and the movable contact assembly 220 and the static contact 223 of the contact mechanism adopt a bridge structure, and the contact mechanism and the wiring assembly 24 are respectively arranged in the shell 21 and outside the shell 21, thereby ensuring that the contact mechanism forms a modular structure, which is convenient for assembly and avoids opening an operating hole for operating the wiring assembly 24 in the shell 21, which is beneficial to ensure that the contact mechanism is in a relatively closed environment and reduce the interference of the external environment on the contact mechanism.

[0102] Specifically, the two static contacts 223 are arranged side by side in the middle of the shell 21. When the switch is opened, the connection line between each dynamic contact part 2221 and a static contact part 2232 is parallel to the first direction, that is, the connection line between each dynamic contact part 2221 and each static contact part 2232 is perpendicular to the connection line between a pair of wiring components 24. This is beneficial to reducing the space occupied by the contact mechanism and helps to reduce the volume of the entire contact unit 2. Furthermore, an isolation groove 217 is also provided in the shell 21 between the two static contacts 223, and the contact support 221 is provided with an isolation plate 2212. When the switch is closed, the isolation plate 2212 can be correspondingly plugged into the isolation groove 217 to block the two static contacts 223, thereby ensuring the safety of the product.

[0103] like Figure 20-22 As shown, each contact unit 2 also includes two arc extinguishing systems, which are respectively arranged 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 a plurality of arc extinguishing grids 2311 arranged at intervals, and an arc extinguishing gap is formed between two adjacent arc extinguishing grids 2311. The plurality of arc extinguishing gaps are arranged at intervals in the first direction, and the two ends of the arc extinguishing gap 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-striking plate 234, and each static contact 223 is connected to a static arc-striking plate 235. The moving arc-striking plate 234 and the static arc-striking plate 235 are respectively connected to the arc entry end of the arc extinguishing chamber 231, which is beneficial for the arc to be introduced into the arc extinguishing chamber 231 when the contact mechanism is opened.

[0104] The exhaust port 212 provided in the housing 21 is close to the exhaust end of the arc extinguishing chamber 231, and each exhaust port 212 is connected with the exhaust end of the arc extinguishing chamber 231 to form a plurality of exhaust channels 230, and each exhaust channel 230 is respectively connected with a corresponding arc extinguishing gap. In this embodiment, each arc extinguishing system further includes a blocking structure provided between the exhaust end of the arc extinguishing chamber 231 and the exhaust port 212, and the blocking structure blocks a part of the area of ​​each exhaust channel 230 to block each arc extinguishing gap from being connected in a straight line with the exhaust port 212. In this way, a part of the exhaust channel 230 is blocked by the blocking structure, thereby preventing each arc extinguishing gap from being connected in a straight line with the exhaust port 212, preventing the exhaust gas from being directly discharged from the exhaust end of the arc extinguishing chamber 231 and then discharged out of the housing 21, thereby reducing the discharge of high-temperature gas and charged particles.

[0105] Further, such as Fig.23 , 24 As shown, the barrier structure includes a first barrier portion 213 and a second barrier portion 214 which are staggered, wherein the first barrier portion 213 is spaced opposite to the side area of ​​the exhaust end of the arc extinguishing chamber 231, and the second barrier portion 214 is spaced opposite to the middle area 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 smaller 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 cooperate with each other to make the exhaust channel 230 as a whole in a zigzag shape. The gas flowing in the exhaust channel 230 is discharged after two turns, avoiding the arc extinguishing gap and the exhaust port 212 from being connected along a straight line, thereby extending the cooling buffer time of the gas in the shell 21.

[0106] In addition, if Fig.10 , 16 -24, each arc extinguishing system also includes a magnetizing component, each magnetizing component includes two magnetic conductive plates 232, and the two magnetic conductive plates 232 are spaced apart to form an arc striking space. In the present embodiment, the magnetic conductive plates 232 are spaced apart and opposite to each other in the second direction, and each arc extinguishing chamber 231 and the dynamic contact portion 2221 and the static contact portion 2232 adjacent to the arc extinguishing chamber 231 are located in the arc striking space. A permanent magnet 233 is arranged at one end of the arc striking space, and an arc striking magnetic field is formed in the arc striking space by the permanent magnet 233, which is conducive to introducing the arc into the arc extinguishing chamber 231.

[0107] The current detection device, the connecting circuit board 63 and the control circuit board 6 of each contact unit 2 are all located outside the housing 21, so that each contact unit 2 forms a modular structure, and avoids the connection circuit board 63 being set through (set along the second direction) to interfere with 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 static contacts 223, and the signal end of the manganese copper shunt 52 is connected to the connecting circuit board 63, or the current detection device is a Hall element, the collection end of the Hall element is connected to a static contact 223, and the Hall element is connected to a transmission circuit board 511, and 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 collection end of the Hall element can be connected to the moving contact assembly 220 in the closed position, that is, connected to the moving contact bridge 222 in the closed position.

[0108] Combination Figure 1-6 16-24 provide a specific structure of a contact unit 2.

[0109] like Figure 16-24 As shown, the contact unit 2 includes a shell 21 and a pair of wiring assemblies 24. The shell 21 in the figure is a rectangular parallelepiped structure with one end closed and the other end provided with an opening. The shell 21 includes a pair of support walls 2101 spaced apart in the second direction, a pair of connecting walls 2102 and a pair of end walls 2103 are connected between the pair of support walls 2101, wherein the pair of connecting walls 2102 are spaced apart and opposite to each other in the third direction, and the pair of end walls 2103 are spaced apart and opposite to each other in the first direction, and an opening is provided in the middle of one of the end walls 2103. In the first direction, the electromagnetic operating system 3 is arranged outside the opening. Two strip-shaped linkage grooves 211 are respectively provided on the edges of the support walls 2101 on both sides of the opening, and the central axis of the linkage groove 211 is parallel to the first direction. A threading hole is provided on each connecting wall 2102, and a pair of wiring components 24 are arranged at intervals in the third direction. Each wiring component 24 is arranged outside the shell 21. In this embodiment, each wiring component 24 includes a wiring frame and a wiring screw arranged on the wiring frame, wherein the wiring frame corresponds to the threading hole, each wiring component 24 is arranged at the end of each assembly cavity, and each wiring component 24 is located in the wiring cavity in the wiring terminal of the shell 1.

[0110] like Figure 20-24As shown, the contact mechanism is correspondingly arranged in the shell 21 in the opening, and the contact mechanism includes a moving contact assembly 220 and two stationary contacts 223, wherein the moving contact assembly 220 includes a contact support 221 and a moving contact bridge 222, wherein the middle part of the contact support 221 is provided with an assembly groove, and the assembly groove is penetrated along the third direction, and the moving contact bridge 222 is limitedly assembled in the assembly groove and makes the two ends of the moving contact bridge 222 extend out of the assembly groove, and the two end parts of the moving contact bridge 222 are bent and extended in the direction away from the stationary contact 223 to form a moving arc-striking plate 234, and the two stationary contacts 223 are arranged side by side in the middle part of the shell 21, and each stationary contact 223 is connected to a stationary arc-striking plate 235, and each stationary arc-striking plate 235 extends in the direction away from the moving contact assembly 220, and the contact mechanism forms a symmetrical structure about the central axis of the opening; a contact support 221 is provided in the shell 21 between the two stationary contacts 223. The isolation groove 217 is a strip-shaped groove as a whole, and the strip-shaped groove is coaxial with the opening. An isolation plate 2212 is protruding from the side of the contact support 221 facing the static contact 223. When the switch is closed, the isolation plate 2212 is inserted into the isolation groove 217 to isolate the two static contacts 223. At least one linkage shaft 2211 is provided on the side of the contact support 221 away from the static contact 223. The linkage shaft 2211 extends along the second direction. There are two linkage shafts 2211 in the figure, and each linkage shaft 2211 corresponds to a linkage groove 211. Two adjacent contact supports 221 are connected in linkage through the linkage shaft 2211. In addition, an axial hole can be opened on the contact support 221, and a linkage shaft 2211 is inserted in the axial hole. Multiple contact supports 221 can share one linkage shaft 2211, thereby realizing the linkage connection of multiple contact supports 221.

[0111] In this embodiment, the static contact 223 includes a conductive plate 2231, which is arranged along the side position of the shell 21. The first end of the conductive plate 2231 is folded back and provided with a static contact portion 2232 spaced opposite to the moving contact portion 2221. The static contact portion 2232 is spaced opposite to the moving contact portion 2221 in the first direction. The first end of the conductive plate 2231 is bent and extended to form a connecting portion for connecting to the static arc-starting plate 235. The second end of the conductive plate 2231 extends along the third direction and extends from a threading hole set in the shell 21 to be connected to a wiring assembly 24. The conductive plate 2231 of the static contact 223 directly extends to the outside of the shell 21 to be connected to the wiring assembly 24, which simplifies the wiring between the wiring assembly 24 and the contact mechanism and has the advantage of convenient operation.

[0112] Preferably, the static arc-striking plate 235 is arranged in parallel with the conductive plate 2231 , and a magnetic conductive member can be arranged between the static arc-striking plate 235 and the conductive plate 2231 to shield the influence of the magnetic field generated by the current of the conductive plate 2231 on the arc movement of the static arc-striking plate 235 .

[0113] The two arc extinguishing systems are respectively arranged on opposite sides of the contact mechanism, and each arc extinguishing system includes an arc extinguishing chamber 231, the arc-entry end of the arc extinguishing chamber 231 faces the contact mechanism, the moving arc-striking plate 234 extends to the side of the arc-entry end of the arc extinguishing chamber 231, one end of the static arc-striking plate 235 is spaced opposite to the moving arc-striking plate 234 in the 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 on the side away from the contact mechanism, and a plurality of arc extinguishing grids 2311 arranged at intervals are arranged between the arc-entry end and the exhaust end of the arc extinguishing chamber 231. In this embodiment, the plurality of arc extinguishing grids 2311 in the same arc extinguishing chamber 231 are spaced apart along the first direction, and an arc extinguishing gap for cutting the arc is formed between two adjacent arc extinguishing grids 2311. The conductive plate 2231 of the static contact 223 is arranged along the gap between the arc extinguishing chamber 231 and the shell 21, which can make full use of the space in the shell 21 and improve space utilization.

[0114] An exhaust port 212 is provided on the side wall of the housing 21 near the exhaust end of each arc extinguishing chamber 231. Fig.19 , 24As shown, the exhaust port 212 is opened on a pair of supporting walls 2101 of the housing 21, the exhaust end of the arc extinguishing chamber 231 is connected with the adjacent exhaust port 212 to form a plurality of exhaust channels 230, each exhaust channel 230 is respectively connected with a corresponding arc extinguishing gap, and a blocking structure is arranged between the exhaust end of the arc extinguishing chamber 231 and the exhaust port 212, the blocking structure correspondingly blocks a part of the area of ​​each exhaust channel 230 to block each arc extinguishing gap from being connected with the exhaust port 212 in a straight line, and the blocking structure includes a first staggered arrangement The barrier portion 213 and the second barrier portion 214, the first barrier portion 213 is spaced and opposite to the side area of ​​the exhaust end of the arc extinguishing chamber 231, and the second barrier portion 214 is spaced and opposite to the middle area of ​​the exhaust end of the arc extinguishing chamber 231, wherein the number of the first barrier portions 213 is multiple, and the multiple first barrier portions 213 are spaced and arranged on each support wall 2101 along the first direction, and each first barrier portion 213 corresponds to an arc extinguishing gap. In the figure, the first barrier portions 213 are arranged on both sides of each arc extinguishing gap. The first barrier 213 and the exhaust port 212 are arranged on the same side of the housing 21. The gas flowing in the exhaust channel 230 is changed in flow direction by the first barrier 213, that is, it flows toward the middle area corresponding to the exhaust end of the arc extinguishing chamber 231. The connecting wall 2102 opposite to the exhaust end of the arc extinguishing chamber 231 is provided with a second barrier 214. The second barrier 214 is a strip-shaped protrusion, and the strip-shaped protrusion is arranged along the first direction. The distance from the second barrier 214 to the exhaust end of the arc extinguishing chamber 231 is greater than that of the first barrier. The distance from the partition 213 to the exhaust end of the arc extinguishing chamber 231, the two side edges of the second barrier portion 214 are spaced opposite to the edges of the first barrier portion 213, that is, in the third direction, the two side edges of the second barrier portion 214 are spaced opposite to the edges of each first barrier portion 213, and the gas flowing in the exhaust channel 230 is turned for the second time when passing through the second barrier portion 214. It can also be understood that the first barrier portion 213 cooperates with the second barrier portion 214 to form each exhaust channel 230 into a broken line shape, such as Fig.23 As shown, the exhaust channel 230 is L-shaped as a whole, and the gas flowing in the exhaust channel 230 is discharged after two turns, avoiding the arc extinguishing gap and the exhaust port 212 from being connected along a straight line, thereby extending the cooling buffer time of the gas in the shell 21.

[0115] In addition, if Fig.24 As shown, the housing 21 is also provided with a baffle 216, which blocks the area of ​​the exhaust port 212 close to the arc extinguishing chamber 231. If other components are provided outside the housing 21, the exhaust gas can be prevented from interfering with it. At the same time, the plate surface of the baffle 216 facing the exhaust channel 230 can further rebound the gas, so that the gas is redirected again, which is conducive to further buffering and cooling of the gas. Fig.24As shown, the exhaust gas discharged from the exhaust end of the arc extinguishing chamber 231 is discharged from the exhaust port 212 after three rebounds. 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. In the figure, the baffle 216 is arranged along the outer side of the shell 21, but the baffle 216 can also be arranged along the inner side of the shell 21.

[0116] Further, such as Figure 20-22 As shown, each arc extinguishing system also includes a plurality of insulating plates 215 arranged at intervals, and the plurality of insulating plates 215 are arranged between the exhaust end of the arc extinguishing chamber 231 and the exhaust port 212, and an insulating gap is left between two adjacent insulating plates 215, and each insulating gap can correspond to an arc extinguishing gap as a part of each exhaust channel 230, respectively. At this time, each first barrier portion 213 can be arranged in a corresponding insulating gap, and a plurality of insulating plates 215 are arranged at the exhaust end of the arc extinguishing chamber 231, which is beneficial to prevent the arc from reigniting at the exhaust end of the arc extinguishing chamber 231, and is beneficial to improving the safety of use.

[0117] Each arc extinguishing system also includes a magnetizing component, wherein the magnetizing component includes a permanent magnet 233 and two magnetic conductive plates 232, the two magnetic conductive plates 232 are arranged at intervals to form an arc striking space, that is, the two magnetic conductive plates 232 are spaced and opposite to each other in the second direction. In this embodiment, each arc extinguishing chamber 231, the moving contact portion 2221 and the static contact portion 2232 are all located in the arc striking space, and a permanent magnet 233 is arranged at one end of the arc striking space. The permanent magnet 233 forms an arc striking magnetic field in the arc striking space, which is conducive to introducing 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 Fig.19 , 20 As shown, the N pole of the permanent magnet 233 located in the left arc extinguishing system is opposite to the N pole of the permanent magnet 233 located in the right arc extinguishing system, thereby realizing non-polarity wiring. Of course, the magnetic poles of the two permanent magnets 233 can also be in the same direction as required to realize polarity wiring requirements.

[0118] In addition, the magnetic conductive plate 232 can be disposed inside the housing 21 or outside the housing 21. Fig.19 In the figure, a magnetic plate mounting groove 218 for assembling a magnetic plate 232 is provided on the shell 1 of the shell 21, that is, a magnetic plate mounting groove 218 is opened on the outer surface of each supporting wall 2101, and the area of ​​the magnetic plate mounting groove 218 corresponds to the area covering the arc extinguishing chamber 231, the dynamic contact part 2221 and the static contact part 2232. Each magnetic plate 232 is fitted on the outer wall of the shell 21, and 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, wherein the permanent magnet 233 extends through the shell 21 to above the arc extinguishing chamber 231.

[0119] Each contact unit 2 also includes a current detection device. In the third direction, the current detection device is correspondingly arranged between a static contact 223 and an adjacent wiring assembly 24. The current detection device is connected to the adjacent static contact 223 or the moving contact assembly 220 in the closed position. A connecting circuit board 63 is connected between the control circuit board 6 and the current detection device, and the connecting circuit board 63 performs signal transmission, wherein the plane where the connecting circuit board 63 is located is parallel to the first direction and the third direction at the same time. The current detection device is directly connected to the adjacent static contact 223 or the moving contact assembly 220 in the closed position. The connecting circuit board 63 does not need to pass through the contact unit 2 to connect with 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, has less interference with the internal structure of the contact unit 2, is easy to form a modular structure, and helps to reduce the difficulty of assembly.

[0120] like Figure 16-22 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 end of the manganese copper shunt 52 is connected to the connecting circuit board 63. Alternatively, the current detection device is a Hall element, and the collection end of the Hall element is connected to a stationary contact 223. The Hall element is connected to a transmission circuit board 511, and 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 collection end of the Hall element can be connected to the moving contact assembly 220 in the closed position, that is, connected to the moving contact bridge 222 in the closed position.

[0121] like Fig.16 As shown, the current detection device is a manganese copper shunt 52, which is connected to a conductive plate 2231 located between the shell 21 and the arc extinguishing chamber 231. The signal end of the manganese copper shunt 52 passes through the side wall of the shell 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 shell 21, thereby facilitating connection with the connecting circuit board 63.

[0122] like Figure 17-22As shown, the current detection device is a Hall element. In the third direction, the Hall element is located between a wiring assembly 24 and the contact mechanism, and the conductive plate 2231 of the static contact 223 and the Hall element are arranged along the first direction. The collection end of the Hall element is connected to a static contact 223. The Hall element is connected to a transmission circuit board 511, and the transmission circuit board 511 is connected to the connecting circuit board 63 for signal transmission. In the figure, the transmission circuit board 511 is fixedly connected to an end wall 2103 of the shell 21, and a first positioning hole 2191 and a second positioning hole 2192 are opened in the end wall 2103 of the shell 21. The transmission circuit board 511 is connected to the shell 21 through the first positioning hole 2191, and the collection end of the Hall element is connected to the conductive plate 2231 of the static contact 223 through the second positioning hole 2192.

[0123] In this embodiment, if Figure 2 , 3 As shown in Figure 18, the connecting circuit board 63 connected between the control circuit board 6 and the current sensor is arranged along the outside of the shell 21, and the plane where the connecting circuit board 63 is located is parallel to the first direction and the third direction at the same time. 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 shell 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 passing through the contact unit 2 along the second direction, thereby ensuring the independence of the wiring unit, facilitating the formation of a modular structure, and facilitating assembly.

[0124] Specific as Figure 2 , 18 As shown, the connecting circuit board 63 is an overall strip-shaped plate structure, and the connecting circuit board 63 is located between the magnetic conductive plate mounting groove 218 and a wiring assembly 24, and the connecting circuit board 63 partially overlaps with the exhaust port 212 opened in the shell 21, and the shell 21 is provided with a baffle 216 for shielding part of the exhaust port 212. In the second direction, the baffle 216 is stacked between the connecting circuit board 63 and the exhaust port 212, so as 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 larger than the length of the supporting 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 set on the control circuit board 6, and a socket is opened in the area of ​​the shell 1 corresponding to the signal port 60.

[0125] Of course, if Figure 3As shown, in the third direction, the connecting circuit board 63 can also be correspondingly located between a pair of wiring components 24, that is, in the second direction, the connecting circuit board 63 and the contact mechanism are stacked, and the connecting circuit board 63 is located outside the shell 21 and between the two magnetic conductive plate mounting grooves 218, one end of the connecting circuit board 63 extends along the first direction to be connected to the control circuit board 6, and the edges on both sides of the other end of the connecting circuit board 63 extend along the third direction toward the direction close to the wiring component 24 to form an extension plate, one of the extension plates can exceed a connecting wall 2102 of the shell 21, and a signal port 60 can be arranged at the extension plate, and a socket is opened in the area of ​​the shell 1 opposite to the signal port 60, at this time, the signal port 60 and the socket are correspondingly located at the wiring terminal of the shell 1, and the other extension plate can be connected to the current detection device in the conductive plate 2231 area corresponding to the static contact 223.

[0126] Of course, the connecting circuit board 63 can also be set at other positions outside the shell 21. The assembly position of the connecting circuit board 63 is more flexible, which is convenient for connecting the control circuit board 6 and fully utilizes the space inside the shell 1. In particular, the connecting circuit board 63 is arranged along the outer side of the shell 21 of the contact unit 2, avoiding interference of the contact unit 2 with the connecting circuit board 63.

[0127] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0128] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An electromagnetic operating system, comprising a coil frame (31) and a yoke (35), wherein the coil frame (31) is provided with two magnets (32) spaced apart from each other, a moving iron core (33) is slidably mounted in the middle of the coil frame (31), and the yoke (35) is arranged on the outside of the coil frame (31), characterized in that: Two coils (34) are wound around the middle of the coil frame (31), and the two coils (34) are distributed along the axial direction of the coil frame (31) for driving the moving iron core (33) to move between a first position and a second position. At least one end of a driving rod (37) connected to the moving iron core (33) passes through a magnetic yoke (35) and extends out of the coil frame (31).

2. The electromagnetic operating system according to claim 1, characterized in that: The two magnets (32) are respectively arranged at two opposite ends of the coil frame (31), and the opposite ends of the two magnets (32) have opposite magnetic properties. In a power-on state, the adjacent ends of the two coils (34) have the same magnetic properties.

3. The electromagnetic operating system according to claim 2, characterized in that: In a power-on state, a repulsive force is generated between one magnet (32) and an adjacent coil (34), and a magnetic attraction force is generated between another magnet (32) and an adjacent coil (34), and the moving iron core (33) is driven by both the repulsive force and the magnetic attraction force.

4. The electromagnetic operating system according to claim 2, characterized in that: The moving iron core (33) is attracted to one magnet (32) at a first position, and is attracted to another magnet (32) at a second position.

5. The electromagnetic operating system according to claim 4, characterized in that: When the moving iron core (33) remains attracted to one of the magnets (32), the two coils (34) stop being energized.

6. The electromagnetic operating system according to claim 1, characterized in that: The axial length of the moving iron core (33) is greater than the axial length of each coil (34).

7. The electromagnetic operating system according to claim 1, characterized in that: It also includes two buffer plates (36), wherein the buffer plates (36) are located between the magnet (32) and the moving iron core (33).

8. The electromagnetic operating system according to claim 1, characterized in that: The coil frame (31) is further provided with a partition (310), the partition (310) being arranged protrudingly along the outer side of the middle portion of the coil frame (31), and the two coils (34) are separated by the partition (310).

9. The electromagnetic operating system according to claim 1 or 8, characterized in that: The coil frame (31) comprises two spaced-apart retaining walls (311), a hollow winding shaft (312) being connected between the two retaining walls (311), a receiving groove being provided in the middle of a surface of a side of each retaining wall (311) facing away from the winding shaft (312), a moving iron core (33) being provided in the hollow part of the winding shaft (312) as a sliding cavity, at least one end of the sliding cavity being connected to the receiving groove, a partition (310) being provided protrudingly on the outer wall in the middle of the winding shaft (312), the partition (310) dividing the space between the two retaining walls (311) into two receiving cavities, and a limiting groove being provided on the partition (310).

10. A switch device, comprising at least one contact unit (2), each contact unit (2) comprising a contact mechanism, the contact mechanism comprising a moving contact assembly (220) and two stationary contacts (223), characterized in that: It also comprises the electromagnetic operating system (3) according to any one of claims 1 to 9, wherein the electromagnetic operating system (3) is drivingly connected to the moving contact assembly (220) of at least one contact unit (2).

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