Switching device

Abstract

A switching device comprises a base, an electromagnetic system and at least one contact unit are arranged in the base, the contact unit comprises a contact system, the contact system comprises a moving contact assembly and a static contact group which are matched with each other, the static contact group comprises two static contacts, each static contact is provided with a wiring part, and the wiring parts are arranged on the moving contact assembly and the static contact group. The wiring part is matched with a wiring groove formed in the base, in the first direction, the contact system is arranged on one side of the electromagnetic system, the electromagnetic system drives the moving contact assembly to move in the first direction, and the static contact assembly is arranged at the same end of the base; in the second direction, the wiring part is opposite to the moving contact assembly at an interval; in the third direction, the two static contacts are arranged at an interval; the first direction, the second direction and the third direction are perpendicular to one another. According to the invention, the wiring part and the static contact of the same contact system are opposite to the moving contact assembly at an interval in two mutually perpendicular directions, so that the length of the contact unit can be shortened.

Description

Technical Field

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

[0002] A switch device is a device that controls the on and off of a circuit. In existing switch devices, it usually has a remote control function, that is, it controls the electromagnetic system to drive the contact system in the contact unit to perform opening and closing movements. Existing products have the following defects: First, the structure in which the electromagnetic system and the contact unit are arranged in parallel increases the overall thickness of the switch device; second, the wiring part, static contact and moving contact in each contact unit are usually arranged in a straight line in sequence, making the length of each contact unit larger; third, the electromagnetic system is arranged above the contact unit, which increases the overall height of the switch device. Summary of the Invention

[0003] The object of the present invention is to overcome at least one defect of the prior art and provide a switch device with a reasonable layout.

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

[0005] The present invention provides a switch device, including a base, in which an electromagnetic system and at least one contact unit are arranged. The contact unit includes a contact system, and the contact system includes a moving contact assembly and a static contact group that cooperate with each other. The static contact group includes two static contacts, each static contact is provided with a wiring portion, and the wiring portion cooperates with a wiring slot opened on the base. In a first direction, the contact system is arranged on one side of the electromagnetic system, and the electromagnetic system drives the moving contact assembly to move along the first direction. The static contact group is arranged at the same end of the base; in a second direction, the wiring portion and the moving contact assembly are spaced apart and opposite to each other; in a third direction, the two static contacts are spaced apart; the first direction, the second direction and the third direction are perpendicular to each other.

[0006] Preferably, the contact unit further comprises two arc extinguishing systems arranged at intervals in the third direction, and in the second direction, the arc extinguishing system, the moving contact assembly and the wiring portion are arranged in sequence.

[0007] Preferably, there are two contact units, and the electromagnetic system is arranged in the middle of the base. In the first direction, the two contact units are located on opposite sides of the electromagnetic system and separated by the electromagnetic system, and each contact unit is arranged at one end of the base.

[0008] Preferably, in the third direction, the maximum length of each contact unit is less than or equal to the maximum length of the electromagnetic system.

[0009] Preferably, the electromagnetic system includes a coil assembly, a moving iron core and a static iron core, the moving iron core and the static iron core are cooperatively arranged on the coil assembly, and a magnetic gap is left between the moving iron core and the static iron core in the first direction.

[0010] Preferably, the coil assembly includes a coil frame, which includes a pair of end walls spaced opposite to each other in a first direction, a hollow shaft connected between the pair of end walls, a coil wound around the outer wall of the hollow shaft, and the middle portion of each end wall is connected to the hollow area of ​​the hollow shaft to form a central hole, the static iron core is arranged at one end of the coil frame, and one end of the moving iron core is slidably assembled with the central hole at the other end of the coil frame along the first direction.

[0011] Preferably, in the third direction, the length of the end wall is greater than or equal to the maximum length of the contact unit; in the second direction, the edge of each end wall extends outward to form a retaining wall, and in the first direction, the retaining wall is respectively spaced opposite to the wiring portion and the arc extinguishing system area.

[0012] Preferably, the electromagnetic system further comprises a linkage member, which is arranged along the first direction and is linked to the moving iron core, and both ends of the linkage member serve as driving parts respectively, and the driving part is connected to a moving contact assembly.

[0013] Preferably, the electromagnetic system further comprises at least one reset member, wherein in the third direction, the reset member is arranged between two static contacts of the same contact system, and in the first direction, the reset member is connected between the moving contact assembly and the base.

[0014] Preferably, the internal space at the same end of the base is divided into three parallel chambers in the third direction, the chambers located on both sides serve as matching chambers, each matching chamber is provided with an arc extinguishing system and a static contact, the chamber located in the middle position serves as a limiting chamber, the limiting chamber is respectively connected to the two matching chambers, and the moving contact assembly moves in the limiting chamber.

[0015] Preferably, the moving contact assembly includes a contact support and a moving contact bridge, the contact support moves along a first direction in the limiting cavity, the moving contact bridge is arranged in the accommodating cavity of the contact support, and both ends of the moving contact bridge extend outside the accommodating cavity as moving contact parts, and the static contact part of each static contact cooperates with a dynamic contact part in a mating cavity.

[0016] Preferably, the moving contact portion is provided with a moving contact, and the edge of the moving contact bridge on at least one side of each moving contact extends outward to form a moving arc-striking portion, and the side of each moving arc-striking portion facing the corresponding static contact portion is an inclined surface, and the thickness of each moving arc-striking portion gradually decreases along the direction from the moving contact to the edge of the moving contact bridge.

[0017] Preferably, the static contact includes a straight static contact plate, the middle part of the static touch plate is bent at least once so that the planes where the two ends of the static touch plate are located form an angle, one end of the static touch plate is provided with a static contact point as a static contact part, the plane where the static contact part is located is parallel to the second direction, and the other end of the static touch plate is provided with a wiring part and cooperates with a wiring slot opened on the base.

[0018] Preferably, the plane where the static contact portion is located is parallel to the second direction, and the plane where the wiring portion is located is parallel to the first direction, so that the static contact has an L-shaped structure.

[0019] Preferably, the connection portions provided on the base extend toward the same end of the base along the first direction.

[0020] Preferably, the arc extinguishing system includes an arc extinguishing chamber, and in the second direction, a moving arc-striking plate and a static arc-striking plate are provided between the arc extinguishing chamber and the contact system, the moving arc-striking plate and the static arc-striking plate are spaced apart from each other in the first direction, one end of the moving arc-striking plate is connected to the moving contact assembly, and the other end of the moving arc-striking plate extends toward the arc extinguishing chamber; one end of the static arc-striking plate is connected to the static contact, and the other end of the static arc-striking plate extends to an end of the arc extinguishing chamber away from the moving contact assembly.

[0021] Preferably, the arc extinguishing system further includes a pair of magnetic conductive plates spaced apart in the third direction, each arc extinguishing chamber is arranged between the pair of magnetic conductive plates, and a permanent magnet is also arranged between the pair of magnetic conductive plates, with the two poles of the permanent magnet facing the pair of magnetic conductive plates respectively.

[0022] Preferably, the arc extinguishing chamber is further provided with an insulating partition, and in the second direction, the insulating partition and the contact system are located on opposite sides of the arc extinguishing chamber.

[0023] Preferably, the contact unit also includes an inner shell, and the arc extinguishing system and the contact system are arranged in the inner shell. The inner shell includes two mating cavities and a limiting cavity arranged in parallel in the third direction. The limiting cavity is located between the two mating cavities and is respectively connected to the two mating cavities. Each arc extinguishing system is arranged in a mating cavity, and the magnetic conductive plate is fitted on the outer surface of the mating cavity.

[0024] Preferably, the base includes a base and a cover body covering the base, the outer surface of the base is provided with at least one mounting portion, the same end of the cover body is provided with two wiring slots spaced apart in a third direction, and the surface of the cover body facing away from the base is protruding with a partition structure, and the partition structure is used to separate the two wiring slots.

[0025] Preferably, the partition structure includes a partition portion and a partition plate, the partition portion is formed by the cover body protruding outward along the second direction, the side of the cover body of the partition portion facing the electromagnetic system forms a avoidance groove for accommodating the electromagnetic system, the partition plate is arranged on one side of the partition portion along the first direction, and the two wiring parts of the same contact unit are separated by a partition plate.

[0026] In the switch device of the present invention, two static contacts of the same contact system and the wiring portion connected to the static contacts are arranged side by side at the same end in the base in the third direction, and the wiring portion and the moving contact assembly are spaced opposite to each other in the second direction, and the static contact group and the moving contact assembly are spaced opposite to each other in the first direction, that is, the wiring portion and the static contact are spaced opposite to the moving contact assembly in two mutually perpendicular directions, which is conducive to shortening the length of the contact unit.

[0027] In addition, the wiring part, the contact system and the arc extinguishing system are arranged in sequence in the second direction, and the contact system moves linearly along the first direction between the arc extinguishing system and the wiring part, which greatly reduces the space occupied by the moving contact assembly in the second direction during movement, which is conducive to reducing the overall height of the switching device.

[0028] In particular, the contact unit and the electromagnetic system are arranged along the first direction, and the thickness of each contact unit is less than or equal to the thickness of the electromagnetic system. Then, the thickness of the electromagnetic system is the thickness of the switch device, making the internal structure more compact and helping to reduce the overall thickness of the switch device.

[0029] In addition, the two end walls of the coil skeleton can play a separating role to prevent the two contact units in the same base from interfering with each other.

[0030] In addition, the same end inside the base is divided into three chambers, which provide installation space for two arc extinguishing systems and moving contact assemblies respectively. Alternatively, the contact unit is set in the base through the inner shell, and three chambers are formed inside the inner shell to provide assembly space for the two arc extinguishing systems and moving contact assemblies, which is conducive to forming a modular structure and convenient assembly.

[0031] In addition, the base is provided with a partition structure, which can separate the two wiring parts to improve the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the switch device of the present invention;

[0033] Figure 2 This is a schematic structural diagram of the switch device of the present invention with the cover removed;

[0034] Figure 3 is a top view of the switch device of the present invention with the cover removed;

[0035] Figure 4This is a schematic diagram of the structure of the switch device after removing the cover and base in the present invention. Figure 1 ;

[0036] Figure 5 This is a schematic diagram of the structure of the switch device after removing the cover and base in the present invention. Figure 2 ;

[0037] Figure 6 This is a top view of the switch device of the present invention with the cover and base removed;

[0038] Figure 7 It is a schematic structural diagram of a contact unit disposed in an inner shell in the present invention;

[0039] Figure 8 It is a schematic diagram of the cooperation between a contact unit and an inner shell in the present invention;

[0040] Figure 9 It is a schematic structural diagram of a contact unit disposed in a bracket in the present invention;

[0041] Figure 10 It is a structural schematic diagram of the inner shell in the present invention;

[0042] Figure 11 It is a schematic structural diagram of a contact unit in the present invention;

[0043] Figure 12 This is a schematic structural diagram of a contact unit facing the electromagnetic system in the present invention;

[0044] Figure 13 This is a schematic structural diagram of a contact unit in the present invention after the magnetic conductive plate is removed;

[0045] Figure 14 It is a schematic structural diagram of an insulating partition in a contact unit of the present invention;

[0046] Figure 15 It is a schematic diagram of the coordination between the electromagnetic system and the moving contact assembly in the present invention;

[0047] Figure 16 It is a structural diagram of the electromagnetic system in the present invention;

[0048] Figure 17 is an exploded schematic diagram of the electromagnetic system of the present invention;

[0049] Figure 18 This is a schematic diagram of the coordination of the moving contact assembly, the static contact group, and the arc extinguishing system in the present invention;

[0050] Figure 19 This is a schematic diagram of the coordination of the moving contact bridge, the static contact group, and the arc extinguishing system in the present invention;

[0051] Figure 20It is a side view of the moving contact bridge, the static contact and the arc extinguishing system of the present invention;

[0052] Figure 21 It is a schematic diagram of the current flow between the moving contact assembly and the static contact in the present invention;

[0053] Figure 22 It is a schematic diagram of the current flow when arc is extinguished in the present invention;

[0054] Figure 23 Schematic diagram of the magnetic field at the moving contact assembly and the static contact in the present invention;

[0055] Figure 24 It is a structural schematic diagram of the moving contact assembly in the present invention;

[0056] Figure 25 is a cross-sectional view of the movable contact assembly of the present invention;

[0057] Figure 26 is an exploded schematic diagram of the moving contact assembly in the present invention;

[0058] Figure 27 It is a structural diagram of the moving contact bridge in the present invention;

[0059] Figure 28 It is a structural schematic diagram of the static contact in the present invention;

[0060] Reference numerals:

[0061] 1-base, 11-base, 111-mounting part, 12-cover, 120-wiring slot, 121-partition plate, 122-partition part, 13-inner shell, 13a-first groove, 13b-first through slot, 131-bracket, 132-cover, 133-threading slot, 141-limiting cavity, 142-matching cavity, 2-contact unit, 21-moving contact assembly, 211-contact Support, 2110-accommodation cavity, 2111-bearing part, 2112-covering part, 2113-reset connection part, 2114-positioning shaft, 211a-clip, 211b-slot, 211c-slide, 211d-limiting platform, 212-moving contact bridge, 2121-moving contact part, 2122-moving contact, 2123-moving arc-starting part, 213-contact spring, 22-static Contact, 221-static contact plate, 2211-static contact part, 2212-wiring part, 2213-connecting section, 2214-static contact, 23-arc extinguishing system, 231-arc extinguishing chamber, 232-magnetic conductive plate, 233-permanent magnet, 2341-moving arc-striking plate, 2342-static arc-striking plate, 235-insulating partition, 236-gas-generating part, 3-electromagnetic system, 31-coil skeleton, 311-end wall, 312-hollow shaft, 32-moving iron core, 321-moving matching part, 33-static iron core, 331-extension arm, 332-static matching part, 34-reset part, 35-linkage part, 350-driving part, 351-linkage arm, 352-limiting arm, 36-coil, a1-first connecting hole, b1-second connecting hole, a2-first connecting part, b2-second connecting part. DETAILED DESCRIPTION

[0062] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the switch device of the present invention. The switch device of the present invention is not limited to the description of the following embodiments.

[0063] like Figure 1-3As shown, the switch device includes a base 1, an electromagnetic system 3 and at least one contact unit 2 driven by the electromagnetic system 3 are arranged in the base 1, the electromagnetic system 3 includes a coil assembly, a moving iron core 32 and a static iron core 33, the coil assembly is usually connected to a control system (not shown), the control system can be arranged in the base 1, and can also be arranged outside the base 1, the static iron core 33 and the moving iron core 32 are respectively arranged on the coil assembly, and a magnetic gap is left between the moving iron core 32 and the static iron core 33 (a magnetic gap refers to a very short air distance between two magnetic materials in a magnetic circuit). When the coil The component drives the moving iron core 32 to move according to the control signal output by the control system; the contact unit 2 includes a contact system, which is connected between a pair of wiring components (not shown), and the pair of wiring components are divided into input terminals and output terminals. The contact system includes a moving contact component 21 and a static contact group that cooperate with each other. The moving contact component 21 is directly or indirectly driven by the moving iron core 32, and the static contact group includes two static contacts 22. Each static contact 22 is provided with a wiring portion 2212 for connecting to a wiring component, and each wiring portion 2212 corresponds to a wiring slot 120 opened on the base 1.

[0064] Preferably, each contact unit 2 further includes an arc extinguishing system 23, which is arranged on one side of the contact system to extinguish the arc generated when the contact mechanism is opened. The arc extinguishing system 23 can adopt existing technology.

[0065] For the convenience of description, the length direction of the base 1 is taken as the first direction, that is, Figure 2 、 8 The direction of the middle X axis is the height direction of the base 1 as the second direction, that is, Figure 2 、 8 The direction of the Y axis is the thickness direction of the base 1 as the third direction, that is, Figure 2 、 8 In the direction of the middle Z axis, the first direction, the second direction and the third direction are perpendicular to each other.

[0066] The improvement of the present application is that, in the first direction, the contact system is arranged on one side of the electromagnetic system 3, and the electromagnetic system 3 drives the moving contact assembly 21 to move along the first direction. The static contact group and the two wiring portions 2212 are arranged at the same end of the base 1. In the second direction, the wiring portion 2212 is spaced apart from the moving contact assembly 21. In the third direction, the two static contacts 22 are spaced apart. In this way, the two static contacts 22 of the same contact system and the wiring portion 2212 connected to the static contact 22 are arranged side by side at the same end of the base 1 in the third direction, and the wiring portion 2212 and the moving contact assembly 21 are spaced apart from each other in the second direction, and the static contact group and the moving contact assembly 21 are spaced apart from each other in the first direction. That is, the wiring portion 2212 and the static contact 22 are spaced apart from the moving contact assembly 21 in two mutually perpendicular directions, which helps to shorten the length of the contact unit 2.

[0067] Further, such as Figure 4 、 5 As shown, each contact unit 2 also includes two arc extinguishing systems 23 spaced apart in the third direction. The arc extinguishing system 23, the moving contact assembly 21 and the wiring portion 2212 are arranged in sequence along the second direction, and the arc extinguishing system 23, the moving contact assembly 21 and the wiring portion 2212 correspond to each other in quantity. The moving contact assembly 21 is between the static contact 22 and the arc extinguishing system 23, and moves linearly in the first direction, which greatly reduces the space occupied by the moving contact assembly 21 in the second direction during movement, which is conducive to reducing the height of the switching device.

[0068] Preferably, two contact units 2 are provided in the base 1, each contact unit 2 is provided inside one end of the base 1, and the electromagnetic system 3 is provided in the middle of the base 1 and separates the two contact units 2, that is, in the first direction, the two contact units 2 are located on opposite sides of the electromagnetic system 3, and the electromagnetic system 3 drives the moving contact assemblies 21 of the two contact units 2 to open and close synchronously, wherein the moving contact assembly 21 in one contact system is located between the electromagnetic system 3 and the corresponding static contact group, and the static contact group in the other contact system is located between the electromagnetic system 3 and the corresponding moving contact assembly 21.

[0069] Furthermore, in the third direction, the maximum length of each contact unit 2 is less than or equal to the maximum length of the electromagnetic system 3, that is, the thickness of the contact unit 2 is less than or equal to the thickness of the electromagnetic system 3, and the overall thickness of the switching device is determined by the thickness of the electromagnetic system 3. Compared with the stacked arrangement of the electromagnetic system 3 and the contact unit 2, the internal structure of the switching device is more compact, which is conducive to reducing the overall thickness of the switching device.

[0070] Combine Figure 1-28 A specific embodiment of a switch device is provided.

[0071] like Figure 1-3As shown, the switch device includes a base 1, and an electromagnetic system 3 is arranged in the middle of the base 1. The electromagnetic system 3 includes a coil assembly and a moving iron core 32 and a static iron core 33 arranged on the coil assembly, wherein the central axis of the coil assembly is parallel to the first direction, and the moving iron core 32 and the static iron core 33 are spaced relative to each other in the first direction to form a magnetic gap for driving the moving iron core 32 to move along the first direction.

[0072] A contact unit 2 is provided at each end of the base 1, so that the two contact units 2 are located at opposite sides of the electromagnetic system 3 in the first direction. Figure 4-14 As shown, each contact unit 2 includes a contact system and an arc extinguishing system 23. The contact system includes a movable contact assembly 21 and a static contact group that cooperate with each other. The movable contact assembly 21 of each contact unit 22 is directly or indirectly driven and connected to the movable iron core 32, so that the movable contact assembly 21 approaches or moves away from the static contact group along a first direction. The static contact group includes two static contacts 22, each static contact 22 is provided with a wiring portion 2212, and each wiring portion 2212 corresponds to a wiring slot 120 provided on the base 1. In the second direction, the wiring portion 2212 is spaced apart from the movable contact assembly 21. The arc extinguishing system 23 is arranged on one side of the contact system for extinguishing the arc generated when the contact system is disconnected. The arc extinguishing system 23, the movable contact assembly 21 and the wiring portion 2212 are arranged in sequence in the second direction, that is, the movable contact assembly 21 moves between the wiring portion 2212 and the arc extinguishing system 23, and the two arc extinguishing systems 23 are spaced apart from each other in the third direction.

[0073] In this embodiment, the contact systems and arc extinguishing systems 23 in the two contact units 2 have the same structure. Figure 15 As shown, the moving contact assembly 21 of one contact unit 2 is located between the electromagnetic system 3 and the corresponding static contact group, and the static contact group in the other contact unit 2 is located between the electromagnetic system 3 and the corresponding moving contact assembly 21. Such a structure allows the contact systems of the two contact units 2 to be synchronously driven to close or open when the moving iron core 32 moves along the first direction.

[0074] In this embodiment, the maximum length of the electromagnetic system 3 in the third direction is greater than or equal to the maximum length of the contact unit 2, and the contact unit 2 and the electromagnetic system 3 are arranged along the first direction, that is, the thickness of the electromagnetic system 3 is greater than or equal to the thickness of the contact unit 2. The length of the switching device in the third direction is determined by the electromagnetic system 3, which is conducive to reducing the overall thickness of the switching device; the electromagnetic system 3 is separated and arranged between the two contact units 2, so as to avoid mutual interference between the two contact systems during opening and closing, thereby improving safety of use.

[0075] In this embodiment, if Figure 1-3As shown, the base 1 preferably includes a base 11 and a cover 12 covering the base 11, wherein the outer surface of the base 11 is provided with at least one mounting portion 111, preferably, the mounting portion 111 is provided at a position close to the corner of the base 1, and each mounting portion 111 is further provided with an assembly hole for fixing the base 1; the same end of the cover 12 is provided with two wiring grooves 120 spaced apart in the third direction, the wiring grooves 120 are connected to the interior of the base 1, and a partition structure is protruded from the surface of the cover 12 facing away from the base 11, and the partition structure is used to separate the two wiring grooves 120, such as Figure 1 As shown, the partition structure includes a partition portion 122 and a partition plate 121. The partition portion 122 is formed by the cover body 12 protruding outward along the second direction. The partition portion 122 forms an avoidance groove on the side facing the electromagnetic system 3, and a partial area of ​​the electromagnetic system 3 can be accommodated in the avoidance groove; the partition plate 121 is arranged on one side of the partition portion 122 along the first direction, so that the two wiring parts 2212 located at the same end of the base 1 are separated by the partition plate 121.

[0076] like Figure 2-12 As shown, the interior of one end of each base 1 is divided into three parallel chambers in the third direction. The division of the three chambers can be achieved by setting a partition in the base 1, wherein the chambers located on both sides of the same end of the base 1 serve as matching chambers 142, and each matching chamber 142 is provided with a static contact 22 and an arc extinguishing system 23. The chamber located in the middle position of the same end of the base 1 serves as a limiting chamber 141, and the limiting chamber 141 is respectively connected to the two matching chambers 142 on both sides. An electromagnetic system 3 is provided in the middle between the two ends of the base 1, and each moving contact assembly 21 is driven by the electromagnetic system 3 to move in the limiting chamber 141 and the two matching chambers 142 along the first direction. Such a structure provides a matching position for the matching of the arc extinguishing system 23 and the contact system, which is conducive to forming a modular structure. At the same time, the arc extinguishing system 23 and the static contact 22 are jointly provided at the same end of the base 1, which is conducive to shortening the overall length of the switching device.

[0077] Preferably, in the second direction, the length of the limiting cavity 141 is smaller than the length of the two matching cavities 142 , so that the limiting cavity 141 and the two matching cavities 142 at the same end of the base 11 are connected to each other to form a U-shaped structure or an H-shaped structure.

[0078] The base 1 is provided with a wiring slot 120 at a position corresponding to the mating cavity 142. Each wiring slot 120 corresponds to the wiring portion 2212 of the static contact 22. The wiring portion 2212 can extend from the wiring slot 120 to the outside of the base 1, or the wiring portion 2212 can be located inside the base 1, with only the wiring hole of the wiring portion 2212 corresponding to the wiring slot 120. In this embodiment, each wiring portion 2212 can be provided with a nut, so that the wiring portion 2212 can be conveniently connected to the wiring screw of the wiring assembly, and the wiring assembly can adopt existing technology.

[0079] Combine Figure 2-6 15-17 provide the specific structure of the electromagnetic system 3 in this embodiment.

[0080] like Figure 15-17 As shown, the electromagnetic system 3 includes a coil assembly, a static iron core 33 and a moving iron core 32. The coil assembly includes a coil frame 31 and a coil 36 wound around the outside of the coil frame 31. The static iron core 33 is fixed on the coil frame 31 and arranged along the outside of the coil assembly. The moving iron core 32 slides through the central hole of the coil frame 31. At least two magnetic gaps are left between the moving iron core 32 and the static iron core 33. Specifically, one end of the moving iron core 32 located in the central hole is spaced relative to the static iron core 33 to form a first magnetic gap, and one end of the moving iron core 32 located outside the central hole is spaced relative to the static iron core 33 to form a second magnetic gap, which is used to ensure the driving force of the moving iron core 32.

[0081] like Figure 15-17 As shown, the movable iron core 32 is also linked to a linkage member 35. Preferably, the linkage member 35 slides through the central hole, so that the two ends of the linkage member 35 serve as drive portions 350 and extend beyond the two ends of the central hole. The linkage member 35 is long enough to position the movable iron core 32 and the stationary iron core 33 between the two drive portions 350. Each drive portion 350 can be driven and connected to the movable contact assembly 21 in a contact unit 2. In this embodiment, the movement trajectories of the movable contact assembly 21, the movable iron core 32, and the linkage member 35 are all parallel to the first direction, and the central axis of the linkage member 35 is also parallel to the first direction. Of course, the linkage member 35 can also be arranged along the outside of the coil assembly, but such a structure increases the overall volume of the electromagnetic system 3.

[0082] Specific as Figure 15-17 As shown, the coil skeleton 31 includes a pair of end walls 311 and a hollow shaft 312 connected between the pair of end walls 311. The middle part of each end wall 311 is connected to the hollow area of ​​the hollow shaft 312 to form a central hole. The coil 36 is wound on the outside of the hollow shaft 312. At least one side edge of each end wall 311 extends outward to form a retaining wall. In the figure, the opposite side edges of each end wall 311 extend outward to form a retaining wall. When the coil skeleton 31 is arranged in the base 1 along the first direction, the two end walls 311 are spaced apart and opposite to each other in the second direction. The retaining wall on each end wall 311 extends in the second direction, which can serve to separate the two contact units 2. In the figure, each end wall 311 is approximately rectangular plate-shaped after being extended to form a retaining wall. The retaining wall formed by the upper edge of each end wall 311 can abut against the inside of the base 1, and the retaining wall formed by the lower edge of each end wall 311 extends to the middle of the arc extinguishing system 23, that is, part of the area in the arc extinguishing system 23 is spaced apart and opposite to the retaining wall.

[0083] like Figure 15-17As shown, the static iron core 33 is fixedly arranged at one end of the coil skeleton 31, with the middle part of the static iron core 33 facing the central hole at one end of the coil skeleton 31, but the middle part of the static iron core 33 does not completely block one end of the central hole, and a gap is left between the edge of the static iron core 33 and the edge of the central hole for the linkage 35 to pass through. The two ends of the static iron core 33 extend along the axial direction of the coil skeleton 31 to form extension arms 331, and the end of each extension arm 331 is bent and extends toward the central hole near the other end of the coil skeleton 31 to form a static fitting part 332. In the figure, each extension arm 331 extends along the side of the end wall 311 where no retaining wall is set, and the two extension arms 331 are spaced opposite to each other in the third direction, so that the static iron core 33 occupies less space in the third direction when it is set in the base 1. It can also be understood that the static iron core 33 as a whole is a rectangular frame surrounding the outside of the coil assembly.

[0084] The moving iron core 32 as a whole cooperates with the coil assembly and the static iron core 33 along the first direction. One end of the moving iron core 32 slides through the central hole and is spaced opposite to the static iron core 33 to form a first magnetic gap. The other end of the moving iron core 32 is away from the static iron core 33 and is located outside the central hole. One end of the moving iron core 32 located outside the central hole extends to both sides to form a moving cooperation part 321, so that the moving iron core 32 as a whole has a T-shaped structure. Each moving cooperation part 321 is spaced opposite to a static cooperation part 332 in the first direction to form a second magnetic gap.

[0085] like Figure 15-17 As shown, the linkage member 35 includes two linkage arms 351 spaced opposite to each other, each linkage arm 351 being in the shape of a strip plate as a whole, and a limiting arm 352 being connected between the two linkage arms 351, so that the same end of the two linkage arms 351 forms a driving portion 350 with a clamping gap. In this embodiment, the overall length of the linkage member 35 is relatively long, so that the static iron core 33 and the moving iron core 32 are located between the two driving portions 350. In this embodiment, one of the driving portions 350 can be simultaneously linked to the moving contact assembly 21 and the moving iron core 32. Then, preferably, the driving parts 350 at both ends of the linkage part 35 are divided into a first driving part and a second driving part, wherein the limiting arm 352 is connected at a position closer to one end of the two linkage arms 351, so that the clamping depth of the first driving part is greater than the clamping depth of the second driving part, and the moving iron core 32 is located inside the first driving part and abuts against the limiting arm 352. The position of the first driving part away from the limiting arm 352 is used to connect with the moving contact assembly 21 of one contact unit 2, and the second driving part is connected to the moving contact assembly 21 of another contact unit 2.

[0086] In this embodiment, if Figure 15 、 17As shown, a first connecting hole a1 is provided in the middle of the linkage member 35, and correspondingly, a first connecting hole a1 is also provided on the moving iron core 32. By arranging a first connecting member a2 in the first connecting hole a1, the moving iron core 32 and the linkage member 35 can be connected together; each driving part 350 is provided with a second connecting hole b1, that is, a second connecting hole b1 is provided near the end of each linkage arm 351, and correspondingly, a second connecting hole b1 is also provided on each moving contact assembly 21. By arranging a second connecting member b2 in the second connecting hole b1, the moving contact assembly 21 and the driving part 350 are connected together. The first connecting member a2 and the second connecting member b2 are preferably pins.

[0087] Further, such as Figure 3 As shown, the electromagnetic system 3 further includes at least one reset member 34. The reset member 34 of this embodiment is a spring. In the first direction, the reset member 34 is connected between the movable contact assembly 21 of the contact unit 2 and the base 1. The reset member 34 can drive the electromagnetic system 3 to reset when the contact system is opened through the linkage relationship between the movable contact assembly 21 and the linkage member 35. Figure 3 In the embodiment, the reset member 34 is provided on only one of the moving contact assemblies 21 . In the third direction, the reset member 34 is located between the two stationary contacts 22 of the same contact system.

[0088] Combine Figure 1-6 , 8-15 and 18-28 provide the specific structure of the contact system in this embodiment.

[0089] like Figure 2-6 , 11-14, 18 and 19, the contact system includes a moving contact assembly 21 and a static contact group that cooperate with each other, wherein the moving contact assembly 21 and the static contact group are spaced apart in a first direction, and the moving contact assembly 21 includes a contact support 211 and a moving contact bridge 212, wherein the moving contact bridge 212 is arranged in the accommodating cavity 2110 of the contact support 211 along a third direction, and both ends of the moving contact bridge 212 respectively serve as two moving contact portions 2121 extending to the outside of the contact support 211, and the contact support 211 is linked to the linkage member 35, that is, a second connecting hole b1 is provided on the contact support 211. Furthermore, a contact spring 213 is provided in the accommodating cavity 2110. The contact spring 213 is provided on the side of the moving contact bridge 212 facing away from the static contact 22, and is used to provide contact pressure when the contact system is closed, that is, one end of the contact spring 213 abuts against the accommodating cavity 2110, and the other end of the contact spring 213 abuts against the side of the moving contact bridge 212 facing away from the static contact group.

[0090] In this embodiment, the contact support 211 preferably adopts a split detachable structure to facilitate the disassembly and assembly of the moving contact bridge 212. Figures 24-27As shown, the contact support 211 includes a bearing portion 2111 and a covering portion 2112 that cover each other. A receiving cavity 2110 is formed between the bearing portion 2111 and the covering portion 2112. The movable contact bridge 212 is disposed in the receiving cavity 2110, and the two ends of the movable contact bridge 212 serve as two movable contact portions 2121 extending from both sides of the bearing portion 2111 to the outside of the receiving cavity 2110. Figure 26 In the embodiment, the bearing portion 2111 includes a pair of bearing plates arranged at intervals, one end of the pair of bearing plates is connected together to form a connecting portion, so that the bearing portion 2111 as a whole forms a U-shaped groove structure, and the other end of the pair of bearing plates is open for plugging and matching with the covering portion 2112. The two sides of the pair of bearing portions 2111 are open to form two ends of the movable contact bridge 212 extending out of the accommodating cavity 2110, and a reset connecting portion 2113 is provided on the side of the connecting portion facing away from the accommodating cavity 2110, that is, the reset connecting portion 2113 is provided on the outer side of the bearing portion 2111 away from the covering portion 2112. Figure 26 In the figure, the reset connection portion 2113 is approximately a circular protrusion, which is used to be plugged into one end of the reset member 34.

[0091] like Figure 26 As shown, the covering portion 2112 is a block-shaped body as a whole, and a groove is provided in the middle of one side of the covering portion 2112, so that a U-shaped plug-in body is formed on the side of the covering portion 2112 facing the bearing portion 2111. When the covering portion 2112 covers the bearing portion 2111, the U-shaped plug-in body is located in the accommodating cavity 2110 and can close the open areas on both sides of a pair of bearing plates. The groove has a certain depth for accommodating the contact spring 213, and a positioning shaft 2114 is protruded in the middle of the bottom of the groove, and one end of the contact spring 213 is inserted and positioned on the positioning shaft 2114.

[0092] In this embodiment, a mutually cooperating snap-fitting structure is provided between the carrying portion 2111 and the covering portion 2112. The snap-fitting structure includes a snap-fitting slot 211b and a snap-fitting buckle 211a. Figure 26 In the embodiment, the card slot 211b is provided on a pair of supporting plates, and the buckle 211a is protrudingly provided on the cover portion 2112. Furthermore, a sliding groove 211c is provided on the side of the cover portion 2112. Figure 26 The side of the cover portion 2112 is also provided with a protruding limit platform 211d. The limit platform 211d is provided with a slide groove 211c. The edge of the support portion 2111 is limited and inserted into the slide groove 211c. In other words, the edge of the support plate slides and inserts into the slide groove 211c. After the support portion 211 and the cover portion 2112 are engaged, the limit platform 211d and the slide groove 211c can prevent the side wall of the support portion 2111 from deforming and falling off. In addition, the contact support 211 is provided with a second connection hole b1, which is respectively provided on the support portion 2111 and the cover portion 2112.

[0093] like Figures 24-27 As shown, the moving contact bridge 212 is a strip-shaped plate structure as a whole, and the two ends of the moving contact bridge 212 serve as moving contact parts 2121 respectively. Each moving contact part 2121 is spaced apart from the static contact part 2211 of a static contact 22, and each moving contact part 2121 is provided with a moving contact point 2122. The edge of the moving contact bridge 212 on at least one side of each moving contact point 2122 extends outward to form a moving arc-striking part 2123, and the moving arc-striking part 2123 is close to the arc extinguishing system 34. In this embodiment, the edges of the moving contact bridge 212 on the opposite sides of each moving contact 2122 are respectively formed. They all extend outward to form a moving arc-striking portion 2123, and the side of each moving arc-striking portion 2123 facing the static contact portion 2211 is an inclined surface, and the thickness of each moving arc-striking portion 2123 gradually decreases along the direction from the moving contact 2122 to the edge of the moving contact bridge 212. Furthermore, a moving arc-striking portion 2123 on each moving contact portion 2121 is connected to a moving arc-striking plate 2341, and the moving arc-striking plate 2341 can extend obliquely along the inclined surface of the moving arc-striking portion 2123, which is convenient for assembling the moving arc-striking plate 2341 and improves the arc-striking efficiency.

[0094] like Figure 11-14 , 18, 19 and 28, the static contact group includes two static contacts 22 arranged side by side. When the contact system is arranged at the same end of the base 1, the two static contacts 22 are spaced apart in the third direction, and each static contact 22 is extended along the second direction at a position close to the end of the base 1. In this embodiment, each static contact 22 includes a straight-plate-shaped static contact plate 221, and each static contact plate 221 has a static contact portion 2211 and a wiring portion 2212 at both ends. The static contact portion 2211 is provided with a static contact point 2214, and the wiring portion 2212 is provided with a wiring hole. The two static contacts are spaced apart in the third direction, and each static contact 22 is extended along the second direction at a position close to the end of the base 1. In this embodiment, each static contact 22 includes a straight-plate-shaped static contact plate 221, and each static contact plate 221 has a static contact portion 2211 and a wiring portion 2212 at both ends. The static contact portion 2211 is provided with a static contact point 2214, and the wiring portion 2212 is provided with a wiring hole. The plates 221 are arranged side by side on the same side of the moving contact assembly 21, and the middle parts of the two static contact plates 221 in the same contact system are bent in the same direction at least once, that is, the two static contact plates 221 in the same static contact group are always arranged side by side, so that the static contact portion 2211 and the wiring portion 2212 of the same static contact plate 221 respectively correspond to the adjacent two sides of the moving contact assembly 21. At this time, the plane where the static contact portion 2211 is located is arranged at an angle to the plane where the wiring portion 2212 is located. Preferably, the plane where the static contact portion 2211 is located is perpendicular to the plane where the wiring portion 2212 is located.

[0095] When the static contact 22 is arranged in the base 1, the static contact portion 2211 is arranged at a position close to the end of the base 1 in the second direction, the static contact portion 2211 and the dynamic contact portion 2121 are spaced apart and opposite to each other in the first direction, the wiring portion 2212 is arranged along the first direction, and each wiring portion 2212 is spaced apart and opposite to the dynamic contact assembly 21 in the second direction, and the wiring portion 2212 corresponds to the wiring slot 120 opened on the base 1. In this embodiment, one wiring portion 2212 in the same contact system is used for incoming wires, and the other wiring portion 2212 is used for outgoing wires. All wiring portions 2212 arranged on the base 1 extend along the first direction toward the same end of the base 1. Figure 1-5 In the embodiment, the four connecting portions 2212 of the two contact units 2 all extend toward the right end of the base 1 along the first direction.

[0096] Furthermore, in the second direction, at least a portion of the middle portion of the stationary contact plate 221 corresponds to the gap between the stationary contact portion 2211 and the dynamic contact portion 2121, so that the current flowing through the middle portion of the stationary contact plate 221 is in the opposite direction to the arc current generated between the dynamic contact portion 2121 and the stationary contact portion 2211. Figure 18 、 19 In and 28, the middle area of ​​the static contact plate 221 connected between the wiring portion 2212 and the static contact portion 2211 is the connecting section 2213, and the connecting section 2213 is basically arranged along the first direction. The connecting section 2213 can be bent once or more than once to make the static contact plate 221 as a whole L-shaped structure, or to make the static contact plate 221 as a whole Z-shaped; the edge of one end of the static contact portion 2211 away from the wiring portion 2212 can extend outward to form a static arc-striking portion, and the side of the static arc-striking portion facing the moving contact assembly 21 is a slope, and the inclined surface of the static arc-striking portion is also conducive to connecting the static arc-striking plate 2342.

[0097] like Figure 4 、 5 As shown in Figures 8, 9 and 11-14, each contact unit 2 also includes two arc extinguishing systems 23, and the two arc extinguishing systems 23 are arranged at intervals inside the same end of the base 1 in the third direction. In the second direction, each static contact 22 is located above an arc extinguishing system 23, so that each moving contact part 2121 and the static contact part 2211 are in contact or separated on one side of an arc extinguishing system 23 respectively, and the arc generated when the moving contact part 2121 is separated from the static contact part 2211 is extinguished by the arc extinguishing system 23.

[0098] Specific as Figure 8 and 11As shown in FIG14, each arc extinguishing system 23 includes an arc extinguishing chamber 231, a moving arc striking plate 2341 and a static arc striking plate 2342. The arc extinguishing chamber 231 can adopt the existing technology. The arc extinguishing chamber 231 includes a plurality of arc extinguishing grids arranged at intervals, and an arc extinguishing gap is left between two adjacent arc extinguishing grids. Preferably, the plurality of arc extinguishing grids are arranged at intervals along the first direction, and an arc extinguishing notch is opened at one end edge of each arc extinguishing grid. All arc extinguishing notches are connected along the first direction to form an arc extinguishing groove, and the arc extinguishing groove faces the contact system; the moving arc striking plate 2341 and the static arc-striking plate 2342 are spaced apart from each other in the first direction, one end of the moving arc-striking plate 2341 is connected to a moving arc-striking portion 2123, and the moving arc-striking plate 2341 extends into the arc extinguishing chamber 231 along the inclined surface of the moving arc-striking portion 2123. As the moving contact assembly 21 moves in the first direction, the other end of the moving arc-striking plate 2341 moves accordingly in the arc extinguishing groove; one end of the static arc-striking plate 2342 is connected to the static contact 22, and the other end of the static arc-striking plate 2342 extends into the arc extinguishing chamber 231.

[0099] In this embodiment, the arc extinguishing chamber 231 includes a pair of gas producing members 236, which are spaced apart and opposite to each other in the third direction. In the second direction, the gas producing members 236 are located between the contact system and the arc extinguishing chamber 231. It can also be understood that the gas producing members 236 correspond to the two sides of the arc entrance of the arc extinguishing chamber 231, and the arc extinguishing grooves correspond to the arc entrance. In the first direction, the gas producing member 236 is located between the moving arc striking plate 2341 and the static arc striking plate 2342. The gas generated by the gas producing member 236 pushes the arc into the arc extinguishing chamber 231. The arc extinguishing chamber 231 It also includes an insulating partition 235, which is arranged on the side of the arc extinguishing chamber 231 away from the arc extinguishing groove, that is, in the second direction, the insulating partition 235 and the contact system are respectively located on the opposite sides of the arc extinguishing chamber 231, and a plurality of plug-in parts are provided on one side of the insulating partition 235, each of which can be correspondingly plugged into an arc extinguishing gap, and a plurality of insulating grids arranged at intervals are provided on the other side of the insulating partition 235. The insulating partition 235 insulates and isolates the side of the arc extinguishing chamber 231 away from the contact system, which is conducive to improving safety in use.

[0100] When the contact system is disconnected, the current flowing through the connecting section 2213 is in the opposite direction to the arc current, and the arc is driven into the arc extinguishing chamber 231 by the repulsive force and extinguished.

[0101] Preferably, Figure 11-14 As shown, each arc extinguishing system 23 further includes a pair of magnetic conductive plates 232 spaced apart in the third direction. Each arc extinguishing chamber 231 and the gas generating member 236 are correspondingly arranged between the pair of magnetic conductive plates 232. A permanent magnet 233 is further arranged between the pair of magnetic conductive plates 232, wherein the two magnetic poles of the permanent magnet 233 are respectively facing the two magnetic conductive plates 232. Figure 13 、 14In the embodiment, the permanent magnet 233 and the static arc-striking plate 2342 correspond to the same end of the arc-extinguishing chamber 231, that is, the end away from the moving contact assembly 21. Correspondingly, a magnetic field for arc-striking is formed in the arc-extinguishing chamber 231 and the gas-generating part 236. In this embodiment, the magnetic fields formed by the magnetic conductive plate 232 and the permanent magnet 233 in the two arc-extinguishing systems 23 are in opposite directions, such as Figure 23 As shown, when the operating current is small, in the same contact system, the arc generated when one movable contact portion 2121 and the static contact portion 2211 are disconnected is affected by the permanent magnet 233, causing the arc to move away from the arc extinguishing chamber 231 under the action of the Lorentz force, and the arc generated when the other movable contact portion 2121 and the static contact portion 2211 are disconnected is affected by the permanent magnet 233, causing the arc to enter the arc extinguishing chamber 231 under the action of the Lorentz force; Figure 22 As shown, when the operating current is large (short circuit or overload), the larger current flowing through the middle of the two stationary contact plates 221 in the same contact system generates a magnetic field with a strength greater than that generated by the permanent magnet 233. As a result, the arc generated when the same contact system is disconnected is driven into the arc extinguishing chamber 231, causing the arc voltage to increase rapidly and extinguish. Of course, the permanent magnet 233 can be omitted, and the magnetic conductive plate 232 can be made of a magnetic material. However, making the magnetic conductive plate 232 of a magnetic material increases the cost.

[0102] Preferably, Figure 7-10 As shown, each contact unit 2 also includes an inner housing 13, and the contact system and arc extinguishing system 23 are cooperatively disposed in the inner housing 13, thereby facilitating a modular structure and facilitating assembly and disassembly. When the contact unit 2 is disposed in the base 1 via the inner housing 13, the internal space at the same end of the base 1 does not need to be divided into three parallel chambers.

[0103] like Figure 7-10 As shown, the inner shell 13 includes two mating cavities 142 spaced apart in the third direction, each mating cavity 142 is a relatively closed chamber structure, and each mating cavity 142 is also provided with a wire threading groove 133. An arc extinguishing system 23 and a static contact 22 are provided in each mating cavity 142, and the wiring portion 2212 on the static contact 22 can extend from the wire threading groove 133 and the wiring groove of the base to the outside of the base; a through groove is provided between the two mating cavities 142, and the through groove passes through the first direction as a limiting cavity 141, and is respectively connected to the two mating cavities 142 in the third direction, and the moving contact assembly 21 moves in a straight line in the limiting cavity 141 and the two mating cavities 142, that is, moves along the first direction.

[0104] Preferably, in the second direction, the length of the limiting cavity 141 is smaller than the length of the matching cavity 142, so that the inner shell 13 as a whole forms a U-shaped structure or an H-shaped structure. Such a structure is conducive to reducing the cost of the inner shell 13 and reducing the space occupied by the inner shell 13 in the base 11.

[0105] In addition, the magnetic conductive plate 232 of each arc extinguishing system 23 is disposed in close contact with the outside of each matching cavity 142 , that is, the magnetic conductive plate 232 is located in the gap between the base 1 and the inner shell 13 .

[0106] In this embodiment, if Figure 8 and 10 As shown, the inner shell 13 includes a bracket 131 and a cover plate 132 covering the bracket 131. Figure 8 In the embodiment, the cover 132 covers one end of the bracket 131 along the first direction. The cover 132 can cover one end of the bracket 13 away from the electromagnetic system 3 (for example, Figure 2 The inner shell 13 at the right end of the middle base) or one end of the bracket 13 close to the electromagnetic system 3 (for example Figure 2 The inner shell 13 at the left end of the middle base), each dynamic contact portion 2121 moves between the bracket 13 and the cover plate 132, that is, Figure 10 As shown, the bracket 131 and the cover plate 132 each include two first grooves 13a and a first through groove 13b located between the two first grooves 13a. The two first grooves 13a are spaced apart in the third direction, and the first through grooves 13b are respectively connected to the two first grooves 13a. When the bracket 131 and the cover plate 132 cooperate to form a complete inner shell 13, the first grooves 13a of the bracket 131 and the cover plate 132 are docked to form a matching cavity 142, and the two first through grooves 13b are docked to form a limiting cavity 142. 41; The wire threading groove 133 provided on the inner shell 13 is located at the junction of the bracket 131 and the cover plate 132, that is, the wire threading groove 133 is located at the junction of the two first grooves 13a. In the second direction, the inner shell 13 is provided with a wire threading groove 133, one end of which extends outward to accommodate as many static contacts 22 as possible, so that the cross-sectional shape of the bracket 131 and the cover plate 132 is approximately H-shaped. Of course, when the end of the inner shell 13 provided with the wire threading groove 133 does not need to extend outward, the inner shell 13 is U-shaped as a whole.

[0107] It should be noted that, in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are conventionally placed in use. They are intended solely for ease of description and do not necessarily require the devices or components referred to to have a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0108] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A switch device, comprising a base (1), wherein an electromagnetic system (3) and at least one contact unit (2) are arranged in the base (1), wherein the contact unit (2) comprises a contact system, wherein the contact system comprises a movable contact assembly (21) and a stationary contact group that cooperate with each other, wherein the stationary contact group comprises two stationary contacts (22), each stationary contact (22) being provided with a wiring portion (2212), wherein the wiring portion (2212) cooperates with a wiring slot (120) provided in the base (1), and wherein: In a first direction, the contact system is arranged on one side of the electromagnetic system (3), the electromagnetic system (3) drives the moving contact assembly (21) to move along the first direction, and the static contact group is arranged at the same end of the base (1); in a second direction, the wiring portion (2212) and the moving contact assembly (21) are spaced apart and opposite to each other; in a third direction, the two static contacts (22) are spaced apart; the first direction, the second direction and the third direction are perpendicular to each other.

2. The switch device according to claim 1, characterized in that: The contact unit (2) further comprises two arc extinguishing systems (23) arranged at intervals in the third direction, and in the second direction, the arc extinguishing system (23), the moving contact assembly (21) and the wiring portion (2212) are arranged in sequence.

3. The switch device according to claim 1 or 2, characterized in that: There are two contact units (2), and the electromagnetic system (3) is arranged in the middle of the base (1). In a first direction, the two contact units (2) are located on opposite sides of the electromagnetic system (3) and are separated by the electromagnetic system (3). Each contact unit (2) is arranged at one end of the base (1).

4. The switch device according to claim 3, characterized in that: In the third direction, the maximum length of each contact unit (2) is less than or equal to the maximum length of the electromagnetic system (3).

5. The switch device according to claim 3, characterized in that: The electromagnetic system (3) comprises a coil assembly, a moving iron core (32) and a static iron core (33); the moving iron core (32) and the static iron core (33) are arranged on the coil assembly in a coordinated manner, and a magnetic gap is left between the moving iron core (32) and the static iron core (33) in a first direction.

6. The switch device according to claim 5, characterized in that: The coil assembly includes a coil frame (31), the coil frame (31) includes a pair of end walls (311) spaced apart from each other in a first direction, a hollow shaft (312) is connected between the pair of end walls (311), a coil (36) is wound around the outer wall of the hollow shaft (312), the middle portion of each end wall (311) is connected to the hollow area of ​​the hollow shaft (312) to form a central hole, the static iron core (33) is arranged at one end of the coil frame (31), and one end of the moving iron core (32) is slidably assembled with the central hole of the other end of the coil frame (31) along the first direction.

7. The switch device according to claim 6, characterized in that: In the third direction, the length of the end wall (311) is greater than or equal to the maximum length of the contact unit (2); in the second direction, the edge of each end wall (311) extends outward to form a retaining wall, and in the first direction, the retaining wall is spaced apart from and opposite to the area of ​​the wiring portion (2212) and the arc extinguishing system (23).

8. The switch device according to claim 5, characterized in that: The electromagnetic system (3) further comprises a linkage member (35), the linkage member (35) being arranged along a first direction and being linked to the moving iron core (32), the two ends of the linkage member (35) serving as driving parts (350), and the driving part (350) being connected to a moving contact assembly (21).

9. The switch device according to claim 5, characterized in that: The electromagnetic system (3) further comprises at least one reset member (34); in the third direction, the reset member (34) is arranged between two stationary contacts (22) of the same contact system; in the first direction, the reset member (34) is connected between the moving contact assembly (21) and the base (1).

10. The switch device according to claim 3, characterized in that: The internal space at the same end of the base (1) is divided into three parallel chambers in the third direction, the chambers located at both sides serve as matching chambers (142), each matching chamber (142) is provided with an arc extinguishing system (23) and a static contact (22), the chamber located in the middle serves as a limiting chamber (141), the limiting chamber (141) is respectively connected to the two matching chambers (142), and the moving contact assembly (21) moves in the limiting chamber (141).

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