Contact system, switch unit, and electric switch device

Abstract

The present invention relates to the field of low-voltage electric devices, and in particular to a contact system and an electric switch device comprising the contact system. The contact system comprises a main contact structure and auxiliary contact structures which are respectively pivotally arranged and synchronously rotate; two auxiliary contact structures are respectively arranged on two radial sides of the main contact structure, and rotate synchronously with the main contact structure so that the contact system is closed or opened. The contact system has a fast breaking speed, large clearance, and a strong breaking capability.

Description

Contact systems, switch units and switching devices

[0001] This application claims priority to Chinese patent application number 202310650272.5 and application date June 3, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of low-voltage electrical appliances, and in particular to a contact system, a switch unit comprising the contact system, and a switching electrical appliance comprising the contact system. Background Art

[0003] All switching devices include a contact system for disconnecting and conducting circuits. The opening distance of the contact system is closely related to the breaking capacity of the switching device. Existing contact systems are all implemented by combining moving and static contacts. Against the backdrop of the increasingly miniaturized development trend of switching devices, the contact system implemented by moving and static contacts cannot significantly increase its opening distance and breaking speed within a limited space, which directly affects the improvement of the breaking capacity of the switching device. This is especially true when used to disconnect DC voltages, which seriously affects the current carrying capacity and breaking capacity of the switching device. In addition, the structure and assembly operation of the moving contacts in existing switching devices are complex. In addition, the internal layout of existing switching devices is complex and intertwined, and there is a risk of short circuit.

[0004] Summary of the Invention

[0005] The object of the present invention is to overcome at least one defect of the prior art and to provide a contact system and a switching device, wherein the contact system has a fast breaking speed, a large opening distance, and a strong breaking capacity; a switching unit including the contact system is provided, which has a strong breaking capacity; and a switching device including the contact system is provided, which has a reasonable and compact internal layout and a strong breaking capacity.

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

[0007] A contact system comprises a main contact structure and an auxiliary contact structure which are respectively pivotally arranged and rotate synchronously. Two groups of auxiliary contact structures are respectively arranged on both radial sides of the main contact structure and are closed or opened synchronously with the main contact structure.

[0008] Furthermore, the main contact structure is transmission-connected to two groups of auxiliary contact structures respectively; the two groups of auxiliary contact structures are arranged to rotate synchronously in the same direction, and the auxiliary contact structure and the main contact structure are arranged to rotate synchronously in the opposite direction.

[0009] Furthermore, the main contact structure includes a main gear, and the auxiliary contact structure includes an auxiliary gear meshing with the main gear.

[0010] Furthermore, the rotation axes of the main contact structure and the two groups of auxiliary contact structures are arranged in parallel and are both located on the first plane.

[0011] Furthermore, the two groups of auxiliary contact structures are mutually symmetrical structures with the rotation center of the main contact structure as the center of symmetry.

[0012] A switch unit comprises the contact system, a shell, an arc extinguishing system, a first terminal and a second terminal, wherein the contact system and the arc extinguishing system are arranged in the shell; the two groups of auxiliary contact structures of the contact system are respectively a first auxiliary contact structure and a second auxiliary contact structure, and the first auxiliary contact structure and the second auxiliary contact structure are respectively electrically connected to the first terminal and the second terminal; the arc extinguishing system comprises two groups of arc extinguishing chambers respectively arranged on both radial sides of the main contact structure; one group of the arc extinguishing chambers is arranged on the closing and opening path of the first auxiliary contact structure and the main contact structure; the other group of the arc extinguishing chambers is arranged on the closing and opening path of the second auxiliary contact structure and the main contact structure.

[0013] Furthermore, the rotation axes of the main contact structure and the two groups of auxiliary contact structures are arranged in parallel and are both located on a first plane, and the two groups of arc extinguishing chambers are respectively arranged on both sides of the first plane.

[0014] Furthermore, the housing includes a main cavity, and the contact system and the arc extinguishing system are arranged in the main cavity.

[0015] Furthermore, the housing further includes a first terminal cavity and a second terminal cavity, wherein the first terminal cavity, the main cavity and the second terminal cavity are sequentially separated and arranged; the first terminal is arranged in the first terminal cavity, and the second terminal is arranged in the second terminal cavity;

[0016] Alternatively, the first terminal, a group of arc extinguishing chambers, the second terminal and another group of arc extinguishing chambers are arranged around the contact system along the rotation direction of the main contact structure; the first terminal and the second terminal are respectively arranged on a pair of opposite side walls of the main cavity of the shell, and at least parts of the first terminal and the second terminal are respectively inserted into the main cavity and electrically connected to the two groups of auxiliary contact structures.

[0017] Furthermore, the two ends of each group of arc extinguishing chambers extend to the opening position and closing position of the corresponding auxiliary contact structure respectively; the arc extinguishing chambers include at least two arc extinguishing chamber modules, and each arc extinguishing chamber module is arranged in sequence along the rotation direction of the main contact structure to form an arc extinguishing chamber; or, the arc extinguishing chamber includes partitions and grids, and multiple grids are arranged side by side along the rotation direction of the main contact structure, located between two oppositely arranged partitions, and the two ends of each grid are fixedly connected to the two partitions respectively.

[0018] A switching electrical appliance comprises the contact system, a housing, an operating mechanism, a first terminal and a second terminal. The contact system, the operating mechanism, the first terminal and the second terminal are arranged in the housing. The operating mechanism is used to drive the contact system to close or open. The first terminal, the contact system and the second terminal are arranged in sequence along a first direction d1. The operating mechanism and the contact system are arranged in sequence along a second direction d2, and the first direction d1 and the second direction d2 are perpendicular to each other. The main contact structure and the auxiliary contact structure are respectively pivotally arranged on the housing, and the two groups of auxiliary contact structures are respectively electrically connected to the first terminal and the second terminal.

[0019] Furthermore, the operating mechanism includes a handle pivotally mounted on the housing and a transmission connecting rod, wherein the handle is transmission-connected to the main contact structure or any one of the auxiliary contact structures via the transmission connecting rod;

[0020] The shell includes a first terminal cavity, a main body cavity and a second terminal cavity which are separated in sequence along a first direction d1, and an operating cavity which is separated from the main body cavity along a second direction d2; the first terminal is arranged in the first terminal cavity, the second terminal is arranged in the second terminal cavity, the contact system and the arc extinguishing system are arranged in the main cavity, and the operating mechanism is arranged in the operating cavity.

[0021] Furthermore, the operating mechanism includes a lever mechanism, which includes a locking member and a releasing member that are pivotally arranged and snap-fitted. The releasing member is driven to rotate by an external force, releasing the snap-fit ​​with the locking member, causing the switch electrical appliance to trip and open.

[0022] Furthermore, the switching device also includes an overcurrent protection mechanism, which is used to drive the tripping part to rotate so as to release the snap fit with the locking part when a short circuit and / or overload fault occurs in the circuit where the switching device is located; the lever mechanism and the overcurrent protection mechanism are arranged side by side along the first direction d1, and the overcurrent protection mechanism and the contact system are arranged side by side along the second direction d2.

[0023] Furthermore, the operating mechanism further includes a handle pivotally mounted on the housing, a front link, a rear link, and a rotating plate pivotally mounted on the housing, wherein the handle is transmission-connected to the lever mechanism via the front link, the locking member and the releasing member are respectively pivotally mounted on the rotating plate, and the rotating plate is transmission-connected to the main contact structure or any one of the auxiliary contact structures;

[0024] The shell includes a first terminal cavity, a main body cavity and a second terminal cavity which are separated in sequence along a first direction d1, and an operating cavity which is separated from the main body cavity along a second direction d2; the first terminal is arranged in the first terminal cavity, the second terminal is arranged in the second terminal cavity, the contact system and the arc extinguishing system are arranged in the main cavity, and the operating mechanism and the overcurrent protection mechanism are arranged in the operating cavity.

[0025] The contact system of the present invention has a main contact structure and an auxiliary contact structure that are both pivotally arranged. Firstly, it has a double breaking point. Secondly, a larger opening distance between the main contact structure and the auxiliary contact structure can be achieved by rotating the main contact structure and the auxiliary contact structure at a smaller angle. Thirdly, the contact system has a faster breaking speed. All of the above can significantly improve the breaking capacity of the contact system.

[0026] In addition, the rotation axes of the two groups of auxiliary contact structures are respectively located on both sides of the rotation axis of the main contact structure and are arranged parallel to it. All three are located in the first plane, which is conducive to maximizing the insulation gap and creepage distance between the two groups of auxiliary contact structures and improving insulation performance.

[0027] In addition, the two groups of auxiliary contact structures are centrally symmetrical structures to each other, thereby reducing the number of parts.

[0028] The switch unit of the present invention includes the contact system, and the main contact structure and the auxiliary contact structure of the contact system are both pivotally arranged. Firstly, it has double break points. Secondly, the main contact structure and the auxiliary contact structure can rotate at a smaller angle to achieve a larger opening distance between the main contact structure and the auxiliary contact structure. Thirdly, the contact system has a faster breaking speed. All of the above can significantly improve the breaking capacity of the switch unit; moreover, its arc extinguishing system further improves the breaking capacity of the switch unit.

[0029] The switching electrical appliance of the present invention includes the contact system, wherein the main contact structure and the auxiliary contact structure of the contact system are both pivotally arranged, firstly, having double break points, secondly, a larger opening distance between the main contact structure and the auxiliary contact structure can be achieved by rotating the main contact structure and the auxiliary contact structure at a smaller angle, and thirdly, the contact system has a faster breaking speed, all of which can significantly improve the breaking capacity of the switching electrical appliance; moreover, the internal layout of the switching electrical appliance is reasonable, which not only effectively controls the overall specifications and volume of the switching electrical appliance, but also simplifies the internal circuit connection structure to ensure the internal insulation performance of the switching electrical appliance.

[0030] In addition, the operating mechanism and the contact system are respectively arranged in different spaces, which increases the insulation gap and creepage distance between the operating mechanism and the contact system, and ensures the personal safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1.0 is a schematic structural diagram of the contact system of the present invention;

[0032] Figure 1.1 is a schematic diagram of the structure of a switch in the open state of the present invention, which is preferably an isolating switch;

[0033] Figure 1.2 is a schematic diagram of the structure of a switch in the closed state of the present invention, which is preferably an isolating switch;

[0034] FIG2 is a schematic structural diagram of a switch electrical apparatus of the present invention, which is preferably an isolating switch, and compared with FIG1 , the support cover of the main support is removed;

[0035] FIG3 is a schematic structural diagram of the main contact structure of the present invention at two viewing angles;

[0036] FIG4 is an exploded view of the main contact structure of the present invention from two perspectives;

[0037] FIG5 is a schematic structural diagram of a support base of the present invention;

[0038] FIG6 is a schematic structural diagram of the auxiliary contact structure of the present invention;

[0039] 7 is a schematic cross-sectional view of the secondary contact structure of the present invention;

[0040] FIG8 is a schematic structural diagram of a secondary support of the present invention;

[0041] FIG9 is a schematic structural diagram of the auxiliary contact of the present invention;

[0042] Figure 10.1 is a schematic diagram of the structure of a switching device in the open state of the present invention, which is preferably a rotary disconnector, showing one implementation of its switch unit;

[0043] Figure 10.2 is a schematic diagram of the structure of a switch in the closed state of the present invention, which is preferably a rotary disconnector, and its switch unit is the same as that in Figure 10.1;

[0044] Figure 11.1 is a schematic diagram of the structure of a switching device in the open state of the present invention, which is preferably a rotary disconnector, showing another implementation of its switch unit;

[0045] Figure 11.2 is a schematic diagram of the structure of a switch in the closed state of the present invention, which is preferably a rotary disconnector, and its switch unit is the same as that in Figure 11.1;

[0046] FIG12 is a schematic structural diagram of a switching device of the present invention, which is preferably a rotary isolating switch, showing a third implementation of its switch unit;

[0047] Figure 13.1 is a schematic diagram of the structure of a switching device in the open state of the present invention, which is preferably a circuit breaker;

[0048] Figure 13.2 is a schematic structural diagram of a switching electrical device in a closed state according to the present invention, which is preferably a circuit breaker.

[0049] DESCRIPTION OF NUMERALS 1 Housing; 1-0 Main cavity; 1-1 First terminal cavity; 1-2 Second terminal cavity; 1-3 Separating rib; 1-4 Operating cavity; 2 Main contact structure; 21 Main contact; 214 Positioning groove; 23 Main support; 231 Support base; 2311 Support base positioning protrusion; 2312 Connecting hole; 2313 Support base rotating shaft; 232 Support cover; 2321 Support cover positioning protrusion; 2322 Connecting post; 2323 Support cover rotating shaft; 233 Sector gear; 234 Main contact slot; 235 Connecting post; 236 Connecting hole; 237 Extension portion; 3. Auxiliary contact structure; 3a. First auxiliary contact structure; 31. Auxiliary contact; 310. Auxiliary contact inner section; 311. Auxiliary contact outer section; 310-311. Auxiliary contact step surface; 312. Auxiliary contact limiting protrusion; 31a. First auxiliary contact; 3b. Second auxiliary contact structure; 31b. Second auxiliary contact; 32. Auxiliary support; 320. Auxiliary contact socket; 322. Auxiliary gear; 33. Auxiliary spring; 331. Stationary arm; 332. Moving arm; 324. Stop surface; 325. Auxiliary contact positioning surface; 326. Limiting portion; 32a. First auxiliary support; 32b. Second auxiliary support; 4. Arc extinguishing chamber; 5. First terminal; 6. Second terminal; 7. Handle; 8. Transmission connecting rod; 9. Overcurrent protection mechanism; 10. Front connecting rod; 11. Lever mechanism; 11-1. Rotating plate; 11-2. Locking member; 11-3. Tripping member; 12. Rear connecting rod; 51. First conductor; 61 second conductor. DETAILED DESCRIPTION

[0050] 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.

[0051] As shown in Figures 1.0-2 and 10.1-13.2, the switching device of the present invention includes a housing 1, and a first terminal 5, a contact system, and a second terminal 6 connected in series in sequence; the contact system is closed and opened to conduct and disconnect the circuit in which the switching device is located, and the first terminal 5 and the second terminal 6 are used to connect the switching device to the corresponding circuit.

[0052] As shown in Figure 1.0-13.2, it is an embodiment of the contact system.

[0053] As shown in Figures 1.0-2 and 10.1-13.2, the contact system includes a main contact structure 2 and an auxiliary contact structure 3 that are pivotally arranged and rotate synchronously. Two groups of auxiliary contact structures 3 are respectively arranged on both radial sides of the main contact structure 2 and are closed or disconnected synchronously with the main contact structure 2. When the two groups of auxiliary contact structures 3 are closed with the main contact structure 2, the three are connected in series in sequence. Furthermore, the main contact structure 2 and the auxiliary contact structure 3 rotate synchronously towards each other to close (that is, the main contact structure 2 and the auxiliary contact structure 3 rotate synchronously so that the contacts of the main contact structure 2 and the auxiliary contact structure 3 are close to each other) or rotate synchronously away from each other to disconnect (that is, the main contact structure 2 and the auxiliary contact structure 3 rotate synchronously so that the contacts of the main contact structure 2 and the auxiliary contact structure 3 are away from each other and disconnect). Specifically, the main contact structure 2 and the auxiliary contact structure 3 are pivotally arranged on the housing 1.

[0054] Furthermore, the two groups of secondary contact structures 3 are electrically connected to the first terminal 5 and the second terminal 6, respectively. Furthermore, the first terminal 5 is directly or indirectly electrically connected to one group of secondary contact structures 3 (i.e., the first secondary contact structures 3a) via the first conductor 51, and the second terminal 6 is directly or indirectly electrically connected to the other group of secondary contact structures 3 (i.e., the second secondary contact structures 3b) via the second conductor 61. Furthermore, the first conductor 51 and the second conductor 61 are both flexible connections, and are both directly electrically connected to the corresponding secondary contact structures 3.

[0055] Furthermore, the main contact structure 2 includes a main contact 21, and the auxiliary contact structure 3 includes an auxiliary contact 31. The two ends of the main contact 21 are respectively used to close and disconnect with the two groups of auxiliary contacts 31 to close and disconnect the contact system, thereby turning on and off the circuit where the switching device is located.

[0056] In the contact system of this embodiment, the main contact structure 2 and the auxiliary contact structure 3 are both pivotally arranged, which, firstly, has double breakpoints. Secondly, a larger opening distance between the main contact structure 2 and the auxiliary contact structure 3 can be achieved by rotating the main contact structure 2 and the auxiliary contact structure 3 at a smaller angle. Thirdly, the contact system has a faster breaking speed. All of the above can significantly improve the breaking capacity of the contact system.

[0057] As shown in Figures 1.0-2 and 10.1-13.2, the two groups of auxiliary contact structures 3 are configured to rotate synchronously in the same direction, and the auxiliary contact structures 3 and the main contact structure 2 are configured to rotate synchronously in opposite directions. That is, when the auxiliary contact structures 3 and the main contact structure 2 are closed, the two auxiliary contact structures 3 rotate synchronously in the third direction, while the main contact structure 2 rotates in the fourth direction, and the third direction and the fourth direction are opposite directions. When the auxiliary contact structures 3 and the main contact structure 2 are disconnected, the two auxiliary contact structures 3 rotate synchronously in the fourth direction, while the main contact structure 2 rotates in the third direction. Specifically, as shown in Figures 1.0-2 and 10.1-13.2, the third direction is counterclockwise and the fourth direction is clockwise.

[0058] As shown in Figures 1.0-2 and 10.1-13.2, the rotation axes of the main contact structure 2 and the two groups of auxiliary contact structures 3 are arranged in parallel and are both located on the first plane, that is, the rotation axes of the main contact structure 2 and the two groups of auxiliary contact structures 3 are coplanar, and the rotation axes of the two groups of auxiliary contact structures 3 are respectively located on both sides of the rotation axis of the main contact structure 2 and are arranged parallel to it, which is conducive to maximizing the insulation gap and creepage distance between the two groups of auxiliary contact structures 3 and improving the insulation performance.

[0059] As shown in Figures 1.0-2 and 10.1-13.2, the main contact structure 2 is respectively connected to the two groups of auxiliary contact structures 3 in a transmission manner. That is, when any one of the main contact structure 2 and the two groups of auxiliary contact structures 3 is driven to rotate by an external force (such as the driving force provided by the operating mechanism of the switch electrical appliance, the operating mechanism will be described in the subsequent content), the other two will also be driven to rotate. Specifically, when the main contact structure 2 is driven to rotate by an external force, it drives the two groups of auxiliary contact structures 3 to rotate synchronously; or, when any of the auxiliary contact structures 3 is driven to rotate by an external force, the auxiliary contact structure 3 drives the main contact structure 2 to rotate synchronously, and at the same time, the main contact structure 2 drives the other auxiliary contact structure 3 to rotate synchronously.

[0060] As shown in Figures 1.0-2, 7, and 10.1-13.2, this is an implementation method in which the main contact structure 2 and the auxiliary contact structure 3 are connected in transmission: the main contact structure 2 includes a main gear, and the auxiliary contact structure 3 includes a auxiliary gear 322 meshing with the main gear, that is, the two auxiliary gears 322 are respectively meshed with the main gear, and any one of the three rotates, which will drive the other two to rotate synchronously.

[0061] Of course, the transmission connection between the main contact structure 2 and the auxiliary contact structure 3 is not limited to the above-mentioned implementation method. For example, the main contact structure 2 may be provided with a driving arm, the driving arm being parallel to the rotation axis of the main contact structure 2, and the auxiliary contact structure 3 may be provided with a corresponding waist-shaped passive hole, the driving arm being inserted into the waist-shaped passive hole. The coordination method and principle of the driving arm and the passive hole are conventional technical means in the art and will not be described in detail here. In other words, any method for achieving transmission connection between the main contact structure 2 and the auxiliary contact structure 3 shall fall within the scope of protection of this application.

[0062] As shown in Figures 1.0-8 and 10.1-13.2, the main contact structure 2 includes a pivotally arranged main support 23 and a main contact 21 disposed on the main support 23. The auxiliary contact structure 3 includes a pivotally arranged auxiliary support 32 and an auxiliary contact 31 disposed on the auxiliary support 32. The two ends of the main contact 21 are used to close and open with the two auxiliary contacts 31. Furthermore, the main gear includes two sets of sector gears 233 disposed on radial sides of the main support 23 and coaxially arranged with the main contact structure 2. The two sets of sector gears 233 respectively mesh with the two sets of auxiliary gears 322 on the auxiliary contact structure 3.

[0063] As shown in Figures 3-5, the main support 23 includes a main contact socket arranged in the middle thereof. The main contact 21 is inserted into the main contact socket and its two ends protrude on both radial sides of the main support 23. The main contact 21 also cooperates with the main support 23 to prevent the main contact 21 from moving along the main contact socket to ensure reliable closure between the two ends of the main contact 21 and the two sets of auxiliary contacts 31.

[0064] As shown in Figures 3-5, the main support 23 includes a support cover 232 and a support base 231 that are assembled relative to each other along its axial direction (the same as the axis of rotation of the main contact structure 2). The support base 231 is provided with a main contact slot 234, and the support cover 232 covers the main contact slot 234 to form a main contact receptacle. The structure of the main support 23 simplifies the structure and assembly of the main contact structure 2.

[0065] As another embodiment, the main contact socket is formed by two half grooves respectively provided on the support base 231 and the support cover 232 and relatively spliced ​​together along the circumference of the main support 23 .

[0066] Furthermore, the two sets of sector gears 233 of the main gear are respectively arranged on the radial sides of the support base 231.

[0067] Furthermore, the main support 23 includes a positioning protrusion disposed on the inner side wall of the main contact insertion hole, and the main contact 21 includes a positioning groove 214 disposed thereon. The positioning protrusion and the positioning groove 214 are plugged and limited to prevent the main contact 21 from moving along the main contact insertion hole. Furthermore, the positioning protrusion includes a support seat positioning protrusion 2311 disposed on the bottom wall of the main contact insertion hole 234 and / or a support cover positioning protrusion 2321 disposed on the support cover 232. The positioning groove 214 is provided on the side edge of the main contact 21 facing the bottom wall of the main contact insertion hole 234 and / or on the side edge of the main contact 21 facing the support cover 232. In other words, the support seat positioning protrusion 2311 and the support cover positioning protrusion 2321 can be provided selectively or simultaneously, and the two positioning grooves 214 can also be provided selectively or simultaneously.

[0068] Furthermore, the support base 231 includes two extensions 237, each protruding from either radial side of the support base 231. The two ends of the main contact slot 234 are respectively disposed within the two extensions 237. The two extensions 237 extend the length of the main contact slot 234, increasing the length of the mating portion between the main contact 21 and the main contact slot 234. This not only ensures assembly reliability but also reduces the portion of the main contact 21 protruding from the main support 231, reducing the likelihood of bending of the main contact 21 and increasing the insulation clearance and creepage distance between the main contact 21 and the auxiliary contact 31 after disconnection. Furthermore, the extensions 237 have a U-shaped cross-section that surrounds the exterior of the main contact 21.

[0069] As shown in Figures 3-4, the main support 23 includes two main support shafts respectively provided at both ends of the main support 23. Further, the two main support shafts are a support base shaft 2313 provided on the support base 231 and a support cover shaft 2323 provided on the support cover 232.

[0070] As shown in FIG4 , the main support 23 further includes a plug-in structure, which includes a plug-in post 2322 and a plug-in hole 2312. One of the plug-in posts 2322 is provided on the support cover 232, and the other is provided on the support base 231. Specifically, the plug-in post 2322 is provided on the side of the support cover 232 facing the support base 231, and the plug-in hole 2312 is provided on the end of the support base 231 facing the support cover 232. When the support base 231 and the support cover 232 are assembled, the plug-in post 2322 is inserted into the plug-in hole 2312. Furthermore, two of the plug-in posts 2322 are provided side by side on the support cover 232, and two of the plug-in holes 2312 are provided side by side on the support base 231.

[0071] As shown in Figures 3-4, the main support 23 also includes connecting posts 235 and connecting holes 236, respectively, disposed at its axial ends. When multiple sets of the contact systems are used in parallel and in conjunction with each other along the axis of rotation of the main contact structure 2, the connecting posts 235 of one main support 23 and the connecting holes 236 of the other main support 23 in two adjacent sets of main supports 23 engage with each other, allowing the two main supports 235 to rotate synchronously. Furthermore, the connecting posts 235 are polygonal posts, and the connecting holes 236 are polygonal holes.

[0072] As another embodiment, when multiple contact supports are used in parallel along the axis of the main contact structure 2, each main support 23 is connected by at least one linkage shaft, and the linkage shaft is arranged parallel to the rotation axis of the main contact structure 2 and spaced apart.

[0073] It should be pointed out that the above structure for realizing the parallel linkage of multiple contact systems can be set or cancelled as needed. For example, it can be cancelled when the switch electrical appliance is provided with only one contact system, and it can be set when the switch electrical appliance is provided with multiple contact systems that are linked in parallel.

[0074] As shown in Figures 1.0-2 and 10.1-13.2, among the two groups of auxiliary contact structures 3, one group is a first auxiliary contact structure 3a electrically connected to the first terminal 5, and the other group is a second auxiliary contact structure 3b electrically connected to the second terminal 6; the auxiliary support 32 and the auxiliary contact 31 of the first auxiliary contact structure 3a are the first auxiliary support 32a and the first auxiliary contact 31a respectively, and the auxiliary support 32 and the auxiliary contact 31 of the second auxiliary contact structure 3b are the second auxiliary support 32b and the second auxiliary contact 31b respectively; the first auxiliary support 32a and the second auxiliary support 32b are respectively transmission-connected to the main support 32, and the first auxiliary contact 31a and the second auxiliary contact 31b are respectively closed and disconnected with the two ends of the main contact 21.

[0075] As shown in Figures 1.0-2 and 10.1-13.2, the two groups of auxiliary contact structures 3 are centrally symmetrical structures with the rotation center of the main contact structure 2 as the center of symmetry.

[0076] As shown in FIG6-9 , it is an embodiment of the secondary contact structure 3 .

[0077] As shown in Figures 6-7, the auxiliary contact structure 3 includes a pivotally arranged auxiliary support 32 and an auxiliary contact 31 arranged on the auxiliary support 32. The auxiliary contact 31 swings under the drive of the auxiliary support 32 to close or disconnect with the main contact 2. One end of the auxiliary contact 31 is set on the auxiliary support 32, and the other end is closed and disconnected with the main contact 21.

[0078] As shown in FIG7 , the auxiliary contact 31 is rotatably arranged relative to the auxiliary support 32; the auxiliary contact structure 3 further includes an auxiliary spring 33, which is arranged between the auxiliary contact 31 and the auxiliary support 32. The auxiliary spring 33 applies an overtravel force to the auxiliary contact 31 when the auxiliary contact 31 and the main contact 21 are closed. That is, the auxiliary spring 33 limits the auxiliary contact 31 and the auxiliary support 32 and keeps them relatively stationary. Before the auxiliary support 32 drives the auxiliary contact 31 to rotate so that it makes initial contact with the main contact 21, the auxiliary contact 31 and the auxiliary support 32 maintain synchronous movement. After the auxiliary contact 31 contacts the main contact 21, the auxiliary support 32 will continue to rotate in the original direction by a certain angle. At this time, the auxiliary contact 31 rotates relative to the auxiliary support 31 and overtravels. The auxiliary contact 31 compresses the auxiliary spring 33, and the auxiliary spring 33 applies an overtravel force to the auxiliary contact 31, so that the auxiliary contact 31 presses the main contact 21 to ensure reliable closure of the auxiliary contact 31 and the main contact 21.

[0079] As shown in Figures 7-8, the auxiliary support 32 includes an auxiliary contact socket 320 disposed in its center. One end of the auxiliary contact 31 is inserted into the auxiliary contact socket 320, while the other end protrudes from the auxiliary support 32, closing or disconnecting the main contact 21. Furthermore, the auxiliary spring 33 is a torsion spring disposed within the auxiliary contact socket 320. One spring arm engages with the auxiliary contact 31, serving as a stationary arm 331, and the other spring arm engages with the sidewall of the auxiliary contact socket 320, serving as a movable arm 332. When the auxiliary contact 31 rotates relative to the auxiliary support 32 after contacting the main contact 21, the auxiliary contact 31 presses against the movable arm, compressing the torsion spring and thereby storing energy in the auxiliary spring 33.

[0080] Furthermore, as shown in Figures 7 and 9, the auxiliary contact 31 includes an auxiliary contact limiting protrusion 312. One end of the auxiliary spring 33 engages with the auxiliary contact limiting protrusion 312 to prevent the auxiliary contact 31 from falling out of the auxiliary contact receptacle 320, thereby ensuring the assembly stability of the auxiliary contact 31. Specifically, one spring arm of the auxiliary spring 33 includes a limiting section. The limiting section is located between the auxiliary contact limiting protrusion 312 and the entrance of the auxiliary contact receptacle 320 and engages with the auxiliary contact limiting protrusion 312 to prevent the auxiliary contact 31 from falling out of the auxiliary contact receptacle 320.

[0081] Furthermore, as shown in FIG7 , the auxiliary contact socket 320 includes a stop surface 324 provided at its entrance, and the free end of the spring arm of the auxiliary spring 33 that cooperates with the inner wall of the auxiliary contact socket 320 cooperates with the stop surface 324 to prevent the auxiliary spring 33 from falling out of the auxiliary contact socket 320; that is, the free end of the stationary arm of the auxiliary spring 33 abuts against the stop surface 324.

[0082] As shown in Figures 6 and 8, the auxiliary support 32 also includes a limiting portion 326, which is arranged on the outside of the entrance of the auxiliary contact socket 320, and the auxiliary spring 33 causes the auxiliary contact 31 to abut against the limiting portion 326; the limiting portion 326 increases the length of the matching portion between the auxiliary contact 31 and the auxiliary support 32, on the one hand, to ensure the installation reliability of the auxiliary contact 31, and on the other hand, to increase the force arm of the auxiliary spring 33 acting on the auxiliary contact 31. Because when the auxiliary contact 31 rotates relative to the auxiliary support 32, the free end of the limiting portion 326 is used as a fulcrum, which is conducive to increasing the overtravel force and ensuring the reliability of the closure of the auxiliary contact 31 and the main contact 21.

[0083] As shown in Figures 7-9, the auxiliary contact 31 includes an auxiliary contact inner section 310 and an auxiliary contact outer section 311 connected in sequence, and the connection between the auxiliary contact inner section 310 and the auxiliary contact outer section 311 forms an auxiliary contact step surface 310-311; the auxiliary support 32 also includes an auxiliary contact positioning surface 325 arranged on both sides of the entrance of the auxiliary contact socket 320, and the auxiliary contact positioning surface 325 and the auxiliary contact step surface 310-311 are relatively limited and cooperated to limit the depth of the auxiliary contact 31 inserted into the auxiliary contact socket 320, thereby ensuring the assembly accuracy of the auxiliary contact 31.

[0084] As shown in Figures 1.1-2 and 10.1-13.2, the switch device of the present invention is preferably a rotary disconnector, which includes at least one switch unit, which includes a housing 1 and a contact system disposed within the housing 1. Furthermore, the rotary disconnector also includes an operating mechanism, which is arranged side by side with the switch unit along the axis of the rotation axis of the main contact structure 2. The operating mechanism is transmission-connected to the main contact structure 2 to drive the contact system to close and open.

[0085] In the rotary disconnector of this embodiment, both the first terminal 5 and the second terminal 6 are electrically connected to the external circuit board, or one is electrically connected to the external circuit board and the other is electrically connected to the external conductor, or both are electrically connected to the external conductor.

[0086] The switch unit also includes an arc extinguishing system, which includes two groups of arc extinguishing chambers 4 respectively arranged on both radial sides of the main contact structure 2; one group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the first auxiliary contact structure 3a and the main contact structure 2; the other group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the second auxiliary contact structure 3b and the main contact structure 2; in other words, one group of the auxiliary contact structure 3 (first auxiliary contact structure 3a) and the main contact structure 2 is matched with one group of arc extinguishing chambers 4; the other group of the auxiliary contact structure 3 (second auxiliary contact structure 3b) and the main contact structure 2 is matched with the other group of arc extinguishing chambers 4. The arc extinguishing system further improves the breaking capacity of the switch unit. Furthermore, one group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the first auxiliary contact 31a and one end of the main contact 21; the other group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the second auxiliary contact 31b and the other end of the main contact 21. In other words, one end of the main contact 21 and a set of auxiliary contacts 31 (first auxiliary contacts 31a) are aligned with a set of arc-extinguishing chambers 4; the gap formed by the separation between the end of the main contact 21 and the set of auxiliary contacts 31 is aligned with the arc entrance of the set of arc-extinguishing chambers 4. The other end of the main contact 21 and another set of auxiliary contacts 31 (second auxiliary contacts 31b) are aligned with another set of arc-extinguishing chambers 4; the gap formed by the separation between the end of the main contact 21 and the set of auxiliary contacts 31 is aligned with the arc entrance of the set of arc-extinguishing chambers 4.

[0087] Furthermore, as shown in Figures 1.1-2 and 10.1-13.2, both ends of the arc extinguishing chamber 4 extend to the opening and closing positions of the corresponding auxiliary contact structure 3, respectively. That is, the arc extinguishing chamber 4 covers the entire opening and closing path of the corresponding auxiliary contact structure 3, and the entrance of the arc extinguishing chamber 4 is opposite to the opening gap formed by the disconnection of the corresponding auxiliary contact structure 3 and the main contact structure 2. The arrangement of the arc extinguishing chamber 4 in this manner is conducive to further improving the breaking capacity of the contact system.

[0088] Furthermore, the two groups of arc extinguishing chambers 4 are located on both sides of the first plane (the plane where the rotation axes of the main contact structure 2 and the auxiliary contact structure 3 are located).

[0089] Furthermore, the housing 1 includes a main cavity 1-0, with the contact system and arc extinguishing system arranged within the main cavity 1-0. Furthermore, the housing 1 is also provided with two sets of separating ribs 1-3, which are respectively located on either side of the radial direction of the main contact structure 2. The two sets of separating ribs 1-3 cooperate with the contact system to separate the main cavity 1-0 into two contact cavities. The two ends of the main contact 21, the two sets of auxiliary contacts 31, and the two sets of arc extinguishing chambers 4 are respectively arranged within the two contact chambers. That is, one end of the main contact 21, one set of auxiliary contacts 31, and one set of arc extinguishing chambers 4 are arranged in one contact chamber, while the other end of the main contact 21, the other set of auxiliary contacts 31, and the other set of arc extinguishing chambers 4 are arranged in another contact chamber. The above structural design facilitates separation of the arcs generated by the two sets of auxiliary contacts 31 from the two ends of the main contact 2, thereby improving the breaking capacity. Furthermore, the two groups of separating ribs 1-3 are respectively matched with the auxiliary supports 32 of the two groups of auxiliary contact structures 3, that is, a necessary small gap is set between the separating ribs 1-3 and the auxiliary supports 32 to ensure that the auxiliary supports 32 can rotate freely to achieve closing and disconnection with the main contacts 2.

[0090] As shown in Figures 1.1-2 and 13.1-13.2, a first arrangement of the first and second terminal terminals 5 and 6 is shown: the housing 1 further includes a first terminal cavity 1-1 and a second terminal cavity 1-2, wherein the first terminal cavity 1-1, the main cavity 1-0, and the second terminal cavity 1-2 are sequentially separated; the first terminal 5 is disposed within the first terminal cavity 1-1, and the second terminal 6 is disposed within the second terminal cavity 1-2. The phrase "the first terminal cavity 1-1, the main cavity 1-0, and the second terminal cavity 1-2 are sequentially separated" means that the first terminal cavity 1-1, the main cavity 1-0, and the second terminal cavity 1-2 are sequentially arranged side by side, with partition walls provided between the first terminal cavity 1-1 and the main cavity 1-0, and between the main cavity 1-0 and the second terminal cavity 1-2. Furthermore, the first terminal cavity 1-1, the main cavity 1-0, and the second terminal cavity 1-2 are sequentially arranged along a first direction d1; specifically, the first direction d1 is preferably the up-down direction as shown in Figures 1.1-2 and 13.1-13.2.

[0091] As shown in Figures 10.1-10.2, this is a second layout of the first terminal 5 and the second terminal 6: the first terminal 5, a group of arc extinguishing chambers 4, the second terminal 6 and another group of arc extinguishing chambers 4 are arranged around the contact system along the rotation direction of the main contact structure 2; the first terminal 5 and the second terminal 6 are respectively arranged on a pair of opposite side walls of the main cavity 1-0, and at least parts of the first terminal 5 and the second terminal 6 are respectively inserted into the main cavity 1-0, and are respectively electrically connected to the two groups of auxiliary contact structures 3.

[0092] As shown in Figure 11.1-12, this is the third layout of the first terminal 5 and the second terminal 6: the first terminal 5, a group of arc extinguishing chambers 4, the second terminal 6 and another group of arc extinguishing chambers 4 are arranged around the contact system along the rotation direction of the main contact structure 2; the shell 1 also includes a first terminal cavity 1-1 and a second terminal cavity 1-2, and the first terminal 5 and the second terminal 6 are respectively arranged in the first terminal cavity 1-1 and the second terminal cavity 1-2, and the two terminal cavities are connected to the main cavity 1-0.

[0093] When the first terminals 5 and second terminals 6 of the switch units adopt the second or third layout, and multiple switch units are arranged in parallel and linked along the axis of the rotation axis of the main contact structure 2, the two first terminals 5 and two second terminals 6 of two adjacent switch units are located at the four edges of a quadrangular prism, that is, the first terminals 5 and second terminals 6 of one switching power supply are located at one pair of edges of the quadrangular prism, and the first terminals 5 and second terminals 6 of another switch unit are located at the other pair of edges of the quadrangular prism. Furthermore, the quadrangular prism is a right quadrangular prism with a rectangular cross-section.

[0094] Figures 1.1-2, 10.1-11.2, and 13.1-13.2 illustrate one implementation of the arc extinguishing chamber 4: Each arc extinguishing chamber 4 comprises at least two arc extinguishing chamber modules, arranged sequentially along the rotational direction of the main contact structure 2 to form the arc extinguishing chamber 4. Furthermore, each arc extinguishing chamber module comprises a partition and arc extinguishing grids disposed between the partitions. Combining multiple arc extinguishing chamber modules together reduces production complexity.

[0095] Figure 12 shows another implementation of the arc extinguishing chamber 4: the arc extinguishing chamber 4 comprises partitions and grids. Multiple grids are arranged side by side, surrounding the contact system, along the rotational direction of the main contact structure 2, and positioned between two opposing partitions. Each grid is fixedly connected to the two partitions at both ends. The grids are evenly distributed within the arc extinguishing chamber 4, improving arc extinguishing capability. Furthermore, this design reduces the number of components in the switch unit; however, it increases the difficulty of assembly.

[0096] As shown in Figures 13.1-13.2, the switching device of the present invention is preferably a circuit breaker. The following is an embodiment of the circuit breaker.

[0097] The circuit breaker of this embodiment further includes an operating mechanism disposed within the housing 1. The operating mechanism is used to drive the contact system to close and open. The operating mechanism includes a lever mechanism 11. The lever mechanism 11 includes a locking member 11-2 and a tripping member 11-3 that are pivotally disposed and snap-fitted. The tripping member 11-3 is driven to rotate by an external force, releasing the snap-fit ​​with the locking member 11-2, thereby tripping and opening the circuit breaker.

[0098] Furthermore, the operating mechanism also includes a handle 7 and a front link 10 pivotally mounted on the housing 1. The handle 7 is transmission-connected to a lever mechanism 11 via the front link 10. The lever mechanism 11 is transmission-connected to the main contact structure 2 or any one of the auxiliary contact structures 3. Furthermore, the lever mechanism 11 also includes a rotating plate 11-1 pivotally mounted on the housing 1. A locking member 11-2 and a release member 11-3 are respectively pivotally mounted on the rotating plate 11-1. The rotating plate 11-1 is transmission-connected to the main contact structure 2 or any one of the auxiliary contact structures 3. Furthermore, the operating mechanism also includes a rear link 12. The lever mechanism 11 is transmission-connected to the main contact structure 2 or any one of the auxiliary contact structures 3 via the rear link 12. Specifically, in the circuit breaker of this embodiment, the rotating plate 11-1 of the lever mechanism 11 is transmission-connected to the first auxiliary support 32a of the first auxiliary contact structure 3 via the rear link 12.

[0099] As another embodiment, the rotating plate 11-1 of the lever mechanism 11 is realized by the main support 23 of the main contact structure 2 or the secondary support 32 of the secondary contact structure 3, that is, the locking member 11-2 and the release member 11-3 are pivotally set on the main support 23 or the secondary support 32 respectively. This operating mechanism does not require the setting of the rear connecting rod 12.

[0100] The operating mechanisms of the above two implementations are both typical four-link operating mechanisms, and their working principles and processes are existing technologies in this field and will not be described in detail here.

[0101] The circuit breaker of this embodiment also includes an arc extinguishing system, which includes two groups of arc extinguishing chambers 4 respectively arranged on both radial sides of the main contact structure 2; one group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the first auxiliary contact structure 3a and the main contact structure 2; the other group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the second auxiliary contact structure 3b and the main contact structure 2; in other words, one group of the auxiliary contact structure 3 (first auxiliary contact structure 3a) and the main contact structure 2 is relatively matched with one group of arc extinguishing chambers 4; the other group of the auxiliary contact structure 3 (second auxiliary contact structure 3b) and the main contact structure 2 is relatively matched with the other group of arc extinguishing chambers 4. The arc extinguishing system further improves the breaking capacity of the switch unit. Furthermore, one group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the first auxiliary contact 31a and one end of the main contact 21; the other group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the second auxiliary contact 31b and the other end of the main contact 21. In other words, one end of the main contact 21 and a set of auxiliary contacts 31 (first auxiliary contacts 31a) are aligned with a set of arc-extinguishing chambers 4; the gap formed by the separation between the end of the main contact 21 and the set of auxiliary contacts 31 is aligned with the arc entrance of the set of arc-extinguishing chambers 4. The other end of the main contact 21 and another set of auxiliary contacts 31 (second auxiliary contacts 31b) are aligned with another set of arc-extinguishing chambers 4; the gap formed by the separation between the end of the main contact 21 and the set of auxiliary contacts 31 is aligned with the arc entrance of the set of arc-extinguishing chambers 4.

[0102] As shown in Figures 13.1-13.2, the two ends of the arc extinguishing chamber 4 extend to the opening and closing positions of the corresponding auxiliary contact structure 3, respectively. In other words, the arc extinguishing chamber 4 covers the entire opening and closing path of the corresponding auxiliary contact structure 3. The entrance of the arc extinguishing chamber 4 is opposite to the opening gap formed by the disconnection of the corresponding auxiliary contact structure 3 and the main contact structure 2. The arrangement of the arc extinguishing chamber 4 in this manner is conducive to further improving the breaking capacity of the contact system.

[0103] In the circuit breaker of this embodiment, the arc extinguishing chamber 4 comprises multiple arc extinguishing chamber modules, which are arranged sequentially along the rotation direction of the main contact structure 2 to form the arc extinguishing chamber 4. Furthermore, each arc extinguishing chamber module includes a partition and arc extinguishing grids disposed between the partitions. The arc extinguishing chamber 4 is composed of multiple arc extinguishing chamber modules, which helps reduce production difficulties.

[0104] In another embodiment, the arc extinguishing chamber 4 includes partitions and grids. Multiple grids are arranged side by side around the contact system along the rotational direction of the main contact structure 2, located between two opposing partitions. Each grid is fixedly connected to the two partitions at both ends. The grids are evenly distributed within the arc extinguishing chamber 4, which improves arc extinguishing capability. Furthermore, this arc extinguishing chamber 4 reduces the number of components in the switch unit; however, it increases the difficulty of assembly.

[0105] The circuit breaker of this embodiment further includes an overcurrent protection mechanism 9, which is used to drive the tripping member 11-3 to rotate to release the engagement with the locking member 11-2 when a short circuit and / or overload fault occurs in the circuit where the circuit breaker is located, thereby tripping and opening the circuit breaker.

[0106] The following is a layout of the circuit breaker in this embodiment:

[0107] The first terminal block 5, contact system, and second terminal block 6 are arranged sequentially along a first direction d1, while the operating mechanism and contact system are arranged sequentially along a second direction d2. The first direction d1 and the second direction d2 are perpendicular to each other. Specifically, as shown in Figures 13.1-13.2, the first direction d1 is the vertical direction, and the second direction d2 is the horizontal direction. The circuit breaker of this embodiment has a compact and reasonable layout, which effectively controls the overall size of the circuit breaker while ensuring the internal insulation performance of the circuit breaker.

[0108] Furthermore, the two groups of arc extinguishing chambers 4 are located on both sides of the first plane (the plane where the rotation axes of the main contact structure 2 and the auxiliary contact structure 3 are located).

[0109] Furthermore, the overcurrent protection mechanism 9 and the lever mechanism 11 are arranged side by side along the first direction d1.

[0110] Furthermore, the housing 1 includes a first terminal cavity 1-1, a main body cavity 1-0, and a second terminal cavity 1-2, which are sequentially separated along a first direction d1, and an operating cavity 1-4, which is separated from the main cavity 1-0 along a second direction; the first terminal 5 is arranged in the first terminal cavity 1-1, the second terminal 6 is arranged in the second terminal cavity 1-2, the contact system and the arc extinguishing system are arranged in the main cavity 1-0, and the operating mechanism and the overcurrent protection mechanism 9 are arranged in the operating cavity 1-4. The "separate arrangement" refers to the presence of partition walls between adjacent cavities (i.e., between the first terminal cavity 1-1 and the main cavity 1-0, between the main cavity 1-0 and the second terminal cavity 1-2, and between the operating cavity 1-4 and the main cavity 1-0).

[0111] Furthermore, the housing 1 is further provided with two sets of separating ribs 1-3, which are located on either radial side of the main contact structure 2. The two sets of separating ribs 1-3 cooperate with the contact system to separate the main cavity 1-0 into two contact cavities. The two ends of the main contact 21, the two sets of auxiliary contacts 31, and the two sets of arc extinguishing chambers 4 are respectively arranged in the two contact chambers. That is, one end of the main contact 21, one set of auxiliary contacts 31, and one set of arc extinguishing chambers 4 are arranged in one contact chamber, and the other end of the main contact 21, the other set of auxiliary contacts 31, and the other set of arc extinguishing chambers 4 are arranged in the other contact chamber. The above structural design facilitates separating the arcs generated by the two sets of auxiliary contacts 31 from the two ends of the main contact 2, thereby improving the breaking capacity. Furthermore, the two sets of separating ribs 1-3 are respectively clearance-matched with the auxiliary supports 32 of the two sets of auxiliary contact structures 3. That is, a necessary small gap is provided between the separating ribs 1-3 and the auxiliary supports 32 to ensure that the auxiliary supports 32 can rotate freely to achieve closing and opening with the main contact 2.

[0112] As shown in FIG1.1-2, the switching device of the present invention is preferably an isolating switch. The following is an embodiment of the isolating switch.

[0113] The disconnector of this embodiment further includes an operating mechanism for driving the contact system to close and open. Furthermore, the operating mechanism includes a handle 7 pivotally mounted on the housing 1 and a transmission link 8. The handle 7 is transmission-connected to the main contact structure 2 or any of the auxiliary contact structures 3 via the transmission link 8. In the disconnector of this embodiment, the handle 7 is transmission-connected to the auxiliary support 32a of the first auxiliary contact structure 3a via the transmission link 8.

[0114] The disconnector of this embodiment also includes an arc extinguishing system, which includes two groups of arc extinguishing chambers 4 respectively arranged on both radial sides of the main contact structure 2; one group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the first auxiliary contact structure 3a and the main contact structure 2; the other group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the second auxiliary contact structure 3b and the main contact structure 2; in other words, one group of the auxiliary contact structure 3 (first auxiliary contact structure 3a) and the main contact structure 2 is matched with one group of arc extinguishing chambers 4; the other group of the auxiliary contact structure 3 (second auxiliary contact structure 3b) and the main contact structure 2 is matched with the other group of arc extinguishing chambers 4. The arc extinguishing system further improves the breaking capacity of the switch unit. Furthermore, one group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the first auxiliary contact 31a and one end of the main contact 21; the other group of the arc extinguishing chambers 4 is arranged on the closing and opening path of the second auxiliary contact 31b and the other end of the main contact 21. In other words, one end of the main contact 21 and a set of auxiliary contacts 31 (first auxiliary contacts 31a) are aligned with a set of arc-extinguishing chambers 4; the gap formed by the separation between the end of the main contact 21 and the set of auxiliary contacts 31 is aligned with the arc entrance of the set of arc-extinguishing chambers 4. The other end of the main contact 21 and another set of auxiliary contacts 31 (second auxiliary contacts 31b) are aligned with another set of arc-extinguishing chambers 4; the gap formed by the separation between the end of the main contact 21 and the set of auxiliary contacts 31 is aligned with the arc entrance of the set of arc-extinguishing chambers 4.

[0115] As shown in Figure 1.1-2, the two ends of the arc extinguishing chamber 4 extend to the opening and closing positions of the corresponding auxiliary contact structure 3, respectively. In other words, the arc extinguishing chamber 4 covers the entire opening and closing path of the corresponding auxiliary contact structure 3. The entrance of the arc extinguishing chamber 4 is opposite to the opening gap formed by the disconnection of the corresponding auxiliary contact structure 3 and the main contact structure 2. The arrangement of the arc extinguishing chamber 4 in this manner is conducive to further improving the breaking capacity of the contact system.

[0116] In the disconnector of this embodiment, the arc extinguishing chamber 4 comprises a plurality of arc extinguishing chamber modules, which are arranged sequentially along the rotational direction of the main contact structure 2 to form the arc extinguishing chamber 4. Furthermore, each arc extinguishing chamber module comprises a partition and arc extinguishing grids disposed between the partitions. The arc extinguishing chamber 4 is composed of a plurality of arc extinguishing chamber modules, which helps reduce production complexity.

[0117] In another embodiment, the arc extinguishing chamber 4 includes partitions and grids. Multiple grids are arranged side by side around the contact system along the rotational direction of the main contact structure 2, located between two opposing partitions. Each grid is fixedly connected to the two partitions at both ends. The grids are evenly distributed within the arc extinguishing chamber 4, which improves arc extinguishing capability. Furthermore, this arc extinguishing chamber 4 reduces the number of components in the switch unit; however, it increases the difficulty of assembly.

[0118] The following is a layout of the isolating switch in this embodiment:

[0119] The first terminal block 5, contact system, and second terminal block 6 are arranged sequentially along a first direction d1, while the operating mechanism and contact system are arranged sequentially along a second direction d2. The first direction d1 and the second direction d2 are perpendicular to each other. Specifically, as shown in Figure 1.1-2, the first direction d1 is the vertical direction, and the second direction d2 is the horizontal direction. The layout of the disconnector in this embodiment is compact and reasonable, effectively controlling the overall size of the disconnector while ensuring the internal insulation performance of the disconnector.

[0120] Furthermore, the two groups of arc extinguishing chambers 4 are located on both sides of the first plane (the plane where the rotation axes of the main contact structure 2 and the auxiliary contact structure 3 are located).

[0121] Furthermore, the housing 1 includes a first terminal cavity 1-1, a main body cavity 1-0, and a second terminal cavity 1-2, which are sequentially separated along a first direction d1, and an operating cavity 1-4, which is separated from the main cavity 1-0 along a second direction; the first terminal 5 is arranged in the first terminal cavity 1-1, the second terminal 6 is arranged in the second terminal cavity 1-2, the contact system and the arc extinguishing system are arranged in the main cavity 1-0, and the operating mechanism and the overcurrent protection mechanism 9 are arranged in the operating cavity 1-4. The "separate arrangement" refers to the presence of partition walls between adjacent cavities (i.e., between the first terminal cavity 1-1 and the main cavity 1-0, between the main cavity 1-0 and the second terminal cavity 1-2, and between the operating cavity 1-4 and the main cavity 1-0).

[0122] Furthermore, the housing 1 is further provided with two sets of separating ribs 1-3, which are located on either radial side of the main contact structure 2. The two sets of separating ribs 1-3 cooperate with the contact system to separate the main cavity 1-0 into two contact cavities. The two ends of the main contact 21, the two sets of auxiliary contacts 31, and the two sets of arc extinguishing chambers 4 are respectively arranged in the two contact chambers. That is, one end of the main contact 21, one set of auxiliary contacts 31, and one set of arc extinguishing chambers 4 are arranged in one contact chamber, and the other end of the main contact 21, the other set of auxiliary contacts 31, and the other set of arc extinguishing chambers 4 are arranged in the other contact chamber. The above structural design facilitates separating the arcs generated by the two sets of auxiliary contacts 31 from the two ends of the main contact 2, thereby improving the breaking capacity. Furthermore, the two sets of separating ribs 1-3 are respectively clearance-matched with the auxiliary supports 32 of the two sets of auxiliary contact structures 3. That is, a necessary small gap is provided between the separating ribs 1-3 and the auxiliary supports 32 to ensure that the auxiliary supports 32 can rotate freely to achieve closing and opening with the main contact 2.

[0123] 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.

[0124] 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 contact system, characterized in that: The contact system comprises a main contact structure (2) and an auxiliary contact structure (3) which are respectively pivotally arranged and rotate synchronously, and two groups of auxiliary contact structures (3) are respectively arranged on both radial sides of the main contact structure (2) and are closed or opened synchronously with the main contact structure (2).

2. The contact system according to claim 1, characterized in that: The main contact structure (2) is respectively connected to two groups of auxiliary contact structures (3) in a transmission manner; the two groups of auxiliary contact structures (3) are arranged to rotate synchronously in the same direction, and the auxiliary contact structure (3) and the main contact structure (2) are arranged to rotate synchronously in the opposite direction.

3. The contact system according to claim 2, characterized in that: The main contact structure (2) comprises a main gear, and the auxiliary contact structure (3) comprises an auxiliary gear (322) meshing with the main gear.

4. The contact system according to claim 1, characterized in that: The rotation axes of the main contact structure (2) and the two groups of auxiliary contact structures (3) are arranged in parallel and are both located on a first plane.

5. The contact system according to claim 4, characterized in that: The two groups of auxiliary contact structures (3) are mutually centrally symmetrical structures, with the rotation center of the main contact structure (2) as the symmetry center.

6. A switch unit, characterized in that: The switch unit comprises a contact system as claimed in any one of claims 1 to 5, a housing (1), an arc extinguishing system, a first terminal (5) and a second terminal (6), wherein the contact system and the arc extinguishing system are arranged in the housing (1); the two groups of auxiliary contact structures (3) of the contact system are respectively a first auxiliary contact structure (3a) and a second auxiliary contact structure (3b), wherein the first auxiliary contact structure (3a) and the second auxiliary contact structure (3b) are respectively electrically connected to the first terminal (5) and the second terminal (6); the arc extinguishing system comprises two groups of arc extinguishing chambers (4) respectively arranged on both sides of the main contact structure (2) in the radial direction; one group of the arc extinguishing chambers (4) is arranged on the closing and opening path of the first auxiliary contact structure (3a) and the main contact structure (2); and the other group of the arc extinguishing chambers (4) is arranged on the closing and opening path of the second auxiliary contact structure (3b) and the main contact structure (2).

7. The switch unit according to claim 6, characterized in that: The rotation axes of the main contact structure (2) and the two groups of auxiliary contact structures (3) are arranged in parallel and are both located on a first plane, and the two groups of arc extinguishing chambers (4) are respectively arranged on both sides of the first plane.

8. The switch unit according to claim 6, characterized in that: The housing (1) comprises a main cavity (1-0), and a contact system and an arc extinguishing system are arranged in the main cavity (1-0).

9. The switch unit according to claim 8, characterized in that: The housing (1) further comprises a first terminal cavity (1-1) and a second terminal cavity (1-2), wherein the first terminal cavity (1-1), the main cavity (1-0) and the second terminal cavity (1-2) are arranged in sequence and separately; the first wiring terminal (5) is arranged in the first terminal cavity (1-1), and the second wiring terminal (6) is arranged in the second terminal cavity (1-2); Alternatively, the first terminal (5), a group of arc extinguishing chambers (4), the second terminal (6) and another group of arc extinguishing chambers (4) are arranged around the contact system along the rotation direction of the main contact structure (2); the first terminal (5) and the second terminal (6) are respectively arranged on a pair of opposite side walls of the main cavity (1-0) of the shell (1), and at least parts of the first terminal (5) and the second terminal (6) are respectively inserted into the main cavity (1-0) and electrically connected to the two groups of auxiliary contact structures (3).

10. The switch unit according to claim 6, characterized in that: The two ends of each group of arc extinguishing chambers (4) respectively extend to the opening position and the closing position of the corresponding auxiliary contact structure (3); the arc extinguishing chambers (4) each include at least two arc extinguishing chamber modules, and the arc extinguishing chamber modules are arranged in sequence along the rotation direction of the main contact structure (2) to form the arc extinguishing chamber (4); or, the arc extinguishing chamber (4) includes a partition and a grid sheet, and a plurality of grid sheets are arranged side by side along the rotation direction of the main contact structure (2) and are located between two oppositely arranged partition sheets, and the two ends of each grid sheet are respectively fixedly connected to the two partition sheets.

11. A switch electrical device, characterized in that: The switch device comprises a contact system as claimed in any one of claims 1 to 5, a housing (1), an operating mechanism, a first terminal (5) and a second terminal (6), wherein the contact system, the operating mechanism, the first terminal (5) and the second terminal (6) are arranged in the housing (1), and the operating mechanism is used to drive the contact system to close or open; the first terminal (5), the contact system and the second terminal (6) are arranged in sequence along a first direction d1; the operating mechanism and the contact system are arranged in sequence along a second direction d2, and the first direction d1 is perpendicular to the second direction d2; the main contact structure (2) and the auxiliary contact structure (3) are respectively pivotally arranged on the housing (1), and the two groups of auxiliary contact structures (3) are respectively electrically connected to the first terminal (5) and the second terminal (6).

12. The switch device according to claim 11, characterized in that: The operating mechanism comprises a handle (7) and a transmission connecting rod (8) pivotally arranged on the housing (1); the handle (7) is transmission-connected to the main contact structure (2) or any auxiliary contact structure (3) via the transmission connecting rod (8); The housing (1) comprises a first terminal cavity (1-1), a main cavity (1-0) and a second terminal cavity (1-2) which are arranged in sequence along a first direction d1, and an operating cavity (1-4) which is arranged along a second direction d2 and is separated from the main cavity (1-1); the first wiring terminal (5) is arranged in the first terminal cavity (1-1), the second wiring terminal (6) is arranged in the second terminal cavity (1-2), the contact system and the arc extinguishing system are arranged in the main cavity (1-0), and the operating mechanism is arranged in the operating cavity (1-4).

13. The switch device according to claim 11, characterized in that: The operating mechanism comprises a lever mechanism (11), the lever mechanism (11) comprising a locking member (11-2) and a releasing member (11-3) which are respectively pivotally arranged and snap-fitted, the releasing member (11-3) being driven by an external force to rotate, releasing the snap-fitting with the locking member (11-2), thereby causing the switch electrical appliance to be released.

14. The switch device according to claim 13, characterized in that: The switch device also includes an overcurrent protection mechanism (9), which is used to drive the release member (11-3) to rotate so as to release the snap fit with the lock member (11-2) when a short circuit and / or overload fault occurs in the circuit where the switch device is located; the lever mechanism (11) and the overcurrent protection mechanism (9) are arranged side by side along a first direction d1, and the overcurrent protection mechanism (9) and the contact system are arranged side by side along a second direction d2.

15. The switch device according to claim 13, characterized in that: The operating mechanism further comprises a handle (7) pivotally arranged on the housing (1), a front connecting rod (10), a rear connecting rod (12) and a rotating plate (11-1) pivotally arranged on the housing (1); the handle (7) is transmission-connected to the lever mechanism (11) via the front connecting rod (10); the locking member (11-2) and the releasing member (11-3) are respectively pivotally arranged on the rotating plate (11-1); and the rotating plate (11-1) is transmission-connected to the main contact structure (2) or any one of the auxiliary contact structures (3); The housing (1) comprises a first terminal cavity (1-1), a main cavity (1-0) and a second terminal cavity (1-2) which are arranged in sequence along a first direction d1, and an operating cavity (1-4) which is arranged along a second direction d2 and is separated from the main cavity (1-1); the first wiring terminal (5) is arranged in the first terminal cavity (1-1), the second wiring terminal (6) is arranged in the second terminal cavity (1-2), the contact system and the arc extinguishing system are arranged in the main cavity (1-0), and the operating mechanism and the overcurrent protection mechanism (9) are arranged in the operating cavity (1-4).

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