circuit breaker

Abstract

A kind of circuit breaker, including circuit breaker body and accessory module, circuit breaker body includes shell, operating system and tripping system, accessory module includes accessory housing, operating mechanism, contact mechanism and split excitation tripping mechanism, contact mechanism includes auxiliary moving contact and auxiliary static contact, the moving assembly of split excitation tripping mechanism, auxiliary moving contact is connected with first linkage and second linkage respectively, first linkage, second linkage is cooperated with operating system respectively, split excitation tripping mechanism triggers operating mechanism to trip, auxiliary moving contact rotates with the tripping of operating mechanism and opens, by second linkage triggers operating system to trip, alternatively, tripping system triggers operating system to trip, the tripping rotation of operating system drives first linkage, by moving assembly triggers operating mechanism to trip.In the present application, accessory module and circuit breaker body form modular structure and are assembled, it has the advantages of simple structure, few linkage components and high degree of modularization, and is beneficial to realize assembly.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a circuit breaker. Background Technology

[0002] Residual current operated circuit breakers (RCCBs) serve as residual current protection devices in circuits. When used for remote applications, if the product needs to trip via a signal, structural modifications are required to enable remote tripping. This necessitates incorporating a shunt trip mechanism into the circuit breaker body, which triggers the circuit breaker's operating system to trip. However, existing products present the following problems: First, the shunt trip mechanism is located inside the circuit breaker body, increasing internal complexity and hindering modular design, leading to inconvenience in assembly and disassembly. Second, existing circuit breaker bodies lacking shunt trip mechanisms are limited by their internal structure; without significant structural modifications, it is impossible to integrate the shunt trip mechanism into the existing circuit breaker body. Summary of the Invention

[0003] The purpose of this invention is to overcome at least one defect of the prior art and provide a circuit breaker that is simple in structure, highly reliable and easy to assemble.

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

[0005] This invention provides a circuit breaker, comprising a circuit breaker body and an accessory module assembled together. The circuit breaker body includes a housing and an operating system and a tripping system disposed within the housing. The accessory module includes an accessory housing, an operating mechanism, a contact mechanism, and a shunt tripping mechanism disposed within the accessory housing. The contact mechanism includes an auxiliary moving contact and an auxiliary stationary contact that cooperate with each other. The auxiliary moving contact is linked to the operating mechanism. The shunt tripping mechanism is used to trigger the operating mechanism to trip. The moving component and the auxiliary moving contact of the shunt tripping mechanism are respectively connected to a first linkage and a second linkage. The first linkage and the second linkage respectively cooperate with the operating system.

[0006] The shunt tripping mechanism triggers the operating mechanism to trip, and the auxiliary moving contact rotates to open the circuit as the operating mechanism trips. The second linkage triggers the operating system to trip. Alternatively, the tripping system triggers the operating system to trip, and the tripping rotation of the operating system drives the first linkage, which in turn triggers the operating mechanism to trip.

[0007] Preferably, the movement trajectory of the first linkage component is a straight line.

[0008] Preferably, the accessory housing and the outer shell are each provided with a first linkage hole on the side adjacent to the outer shell, and the first linkage member passes through the first linkage hole, and the movement trajectory of the first linkage member is restricted by the first linkage hole.

[0009] Preferably, the outer shell and the accessory shell are provided with a second linkage hole on their adjacent side walls. The second linkage hole allows the second linkage component to pass through, and the movement trajectory of the second linkage component in the second linkage hole is an arc.

[0010] Preferably, a splicing structure is provided between the outer shell and the accessory shell, the splicing structure including mutually cooperating slots and buckles.

[0011] Preferably, the operating mechanism includes a rotatably mounted auxiliary lever, which is driven to cooperate with an auxiliary moving contact. An auxiliary jumper and an auxiliary lock are rotatably mounted on the auxiliary lever. One end of the auxiliary jumper and the auxiliary lock are fastened together, and the other end of the auxiliary lock is engaged with a moving component.

[0012] Preferably, the auxiliary moving contact includes an auxiliary support, one end of which is linked to the operating mechanism, and the other end of the auxiliary support is provided with a second linkage member. A moving contact piece is provided on the auxiliary support adjacent to the second linkage member, and an auxiliary moving contact point is provided at the end of the moving contact piece away from the auxiliary lever.

[0013] Preferably, the shunt trip mechanism includes a coil assembly and a magnetic conductor. The coil assembly and the magnetic conductor cooperate to generate a magnetic field to drive a moving assembly. The moving assembly includes an armature and a reset member. The armature is rotatably assembled and provided with a first linkage member. The reset member cooperates with the armature to provide a reset force for the armature.

[0014] Preferably, the operating system includes a tripping interlocking assembly, which includes a pusher, a trip latch, a first latch, and a second latch. The pusher and the trip latch are rotatably mounted on one side of the housing, and the first latch and the second latch are interlocked and rotatably mounted on the other side of the housing. The first latch engages with the trip latch, and the second latch engages with the pusher. The pusher engages with the residual current device (RCD) of the tripping system.

[0015] After the operating mechanism is disengaged, the second linkage pushes the second latch to rotate to trigger the operating system to disengage; or, when the operating system is disengaged, the jumper drives the first linkage to cause the moving component to trigger the operating mechanism to disengage.

[0016] Preferably, the second latch includes a rotating shaft body that is rotatably assembled. The circumferential sidewall of the rotating shaft body is provided with an engagement groove. The two ends of the rotating shaft body are provided with a first mating part and a second mating part. The first mating part is engaged with the pusher and the second mating part is engaged with the second linkage.

[0017] Preferably, the operating system includes a fixed plate and a linkage assembly, wherein the linkage assembly and the release interlock assembly are rotatably mounted on the same side of the fixed plate and are sequentially linked.

[0018] Preferably, the fixing plate has a third linkage hole, which corresponds to the first linkage hole in the accessory housing and the outer shell. The first linkage component passes through the first linkage hole and the third linkage hole and cooperates with the operating system.

[0019] Preferably, the outer shell is rotatably equipped with a handle assembly, the handle assembly is linked to the operating system, the accessory shell is rotatably equipped with a handle mechanism, the handle mechanism is linked to the operating mechanism, and the handle mechanism is linked to the handle assembly.

[0020] Preferably, the circuit breaker body includes at least one contact unit, the contact unit includes a pair of terminals and a contact system, the contact system is disposed between the pair of terminals, the contact system includes a moving contact and a stationary contact that cooperate with each other, the moving contact is linked to the operating system, and the stationary contact is fixedly disposed inside the housing.

[0021] The circuit breaker of the present invention has an accessory module and a circuit breaker body that form a modular structure for assembly. The accessory module and the circuit breaker body can be mutually driven to trip through a first linkage and a second linkage. It has the advantages of simple structure, few linkage parts and high degree of modularity, which is conducive to assembly.

[0022] In addition, the accessory housing and outer shell are assembled by snaps and slots, which has the advantage of convenient assembly and disassembly.

[0023] Furthermore, it only requires replacing the second latch in the operating system, with minimal changes to the internal structure of the existing circuit breaker body, making it widely applicable. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the cooperation between the circuit breaker body and the accessory module of the present invention (excluding the outer shell and accessory housing).

[0025] Figure 2 This is a schematic diagram showing the interaction between the leakage current trip device and the lever in this invention;

[0026] Figure 3 This is a schematic diagram of the circuit breaker body of the present invention after the outer casing has been removed;

[0027] Figure 4 This is a schematic diagram of the operating system in this invention (with the fixing plate removed);

[0028] Figure 5 This is a schematic diagram of the operating system and lever structure in this invention;

[0029] Figure 6 This is a schematic diagram of the lever structure in this invention;

[0030] Figure 7This is a schematic diagram of the structure of the second latch in this invention;

[0031] Figure 8 This is a schematic diagram of the structure of the outer shell and accessory housing in this invention;

[0032] Figure 9 This is a structural schematic diagram of the accessory module in this invention;

[0033] Figure 10 This is a schematic diagram of the structure of the accessory module facing away from the circuit breaker body in this invention;

[0034] Figure 11 This is a schematic diagram illustrating the cooperation between the operating mechanism and the contact mechanism in this invention;

[0035] Figure 12 This is a structural schematic diagram of the accessory module facing the circuit breaker body in this invention;

[0036] Figure 13 This is a schematic diagram showing the cooperation between the operating mechanism, the contact mechanism, and the tripping mechanism in this invention;

[0037] Figure 14 This is an exploded view of the auxiliary moving contact in this invention;

[0038] Figure 15 This is a schematic diagram of the shunt tripping mechanism facing the circuit breaker body in this invention;

[0039] Figure 16 yes Figure 15 A schematic diagram of the decomposition process;

[0040] Figure 17 This is a schematic diagram of the shunt tripping mechanism on the side opposite to the circuit breaker body in this invention;

[0041] Figure 18 yes Figure 17 A schematic diagram of the decomposition process;

[0042] Figure label:

[0043] 1-Accessory module, 10-Accessory housing, 101-Limiting boss, 102-Divider plate, 103-Abutting boss, 11-Handle mechanism, 111-Auxiliary handle, 112-Auxiliary linkage, 12-Operating mechanism, 121-Auxiliary lever, 122-Auxiliary release buckle, 123-Auxiliary lock buckle, 13-Shunting tripping mechanism, 130-Coil assembly, 131-Electromagnetic coil, 132-Coil frame, 133-Magnetic conductor, 1331-Connecting part, 1332-Limiting arm, 134-Armature, 1341-Rotating end, 1340-Attracting area, 1342-Moving end, 135-Reset component, 141-Auxiliary moving contact, 1411-Auxiliary support, 1412-Moving contact piece, 1413-Auxiliary moving contact point, 142- Auxiliary stationary contact, 151-first linkage component, 152-second linkage component, 16-wiring component, a-first linkage hole, b-second linkage hole, c-buckle, d-slot, 2-circuit breaker body, 20-housing, 21-handle assembly, 22-operating system, 221-linkage rod, 222-lever, 2220-linkage shaft, 2221-protrusion, 2222-mounting part, 223-push component, 224-trip button, 225-first latch, 226-second latch, 2261-engaging groove, 2262-first mating part, 2263-second mating part, 227-fixed plate, 2271-third linkage hole, 23-leakage trip unit, 24-contact unit, 241-terminal, 242-moving contact, 243-stationary contact. Detailed Implementation

[0044] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions in the following embodiments.

[0045] The circuit breaker includes a circuit breaker body 2, which includes a housing 20. A handle assembly 21 is rotatably mounted on the housing 20. An operating system 22 is disposed within the housing 20 and is linked to the handle assembly 21. A tripping system cooperates with the operating system 22 to trigger its tripping. One or more contact units 24 are disposed within the housing 20. Each contact unit 24 includes a pair of terminals 241 and a contact system. The pair of terminals 241 are spaced apart, and the contact system is disposed between the pair of terminals 241. The contact system includes mutually compatible components. The moving contact 242 and stationary contact 243 are electrically connected to adjacent terminals 241. At least one moving contact 242 of the contact unit 24 is linked to the operating system 22. The stationary contact 243 is fixedly installed inside the housing 20. The operating handle assembly 21 causes the operating system 22 to drive the moving contact 242 to rotate towards or away from the stationary contact 243, thereby connecting or disconnecting the main line of each contact unit 24. The moving contacts 242 of two adjacent contact units 24 are linked to achieve synchronous closing and opening of the circuit breaker body 2.

[0046] The casing 20 also includes a tripping system, which works in conjunction with the operating system 22 to trigger the operating system 22 to trip. The tripping rotation of the operating system 22 drives the moving contact 242 to rotate away from the stationary contact 243. Specifically, the tripping system includes a control circuit board and current transformers and leakage current trip devices 23 connected to the control circuit board. The current transformers are connected to the main circuit of each contact unit 24. The current transformers feed back current signals to the controller of the control circuit board. The controller outputs control signals to drive the leakage current protector to operate, causing the operating system 22 to trip and disconnect the power. Of course, the tripping system may also include a test button and a test circuit. The test circuit draws power from the main circuit of at least one contact unit 24. The test circuit passes through the center hole of the current transformer and is connected or disconnected by the test button. The tripping system in the circuit breaker body 2 is existing technology.

[0047] The circuit breaker also includes an accessory module 1 with shunt trip function. The accessory module 1 is assembled with the circuit breaker body 2. The accessory module 1 includes an accessory housing 10, on which a handle mechanism 11 is rotatably mounted. The handle mechanism 11 is linked to the handle assembly 21 of the circuit breaker body 2. An operating mechanism 12, a contact mechanism, and a shunt trip mechanism 13 are provided inside the accessory housing 10. The contact mechanism includes an auxiliary moving contact 141 and an auxiliary stationary contact 142 that cooperate with each other. The handle assembly 21, the operating mechanism 12, and the auxiliary moving contact 141 are linked in sequence. The shunt trip mechanism 13 is used to trigger the operating mechanism 12 to trip. Specifically, the shunt trip mechanism 13 includes a coil assembly 130 and a moving component driven by the coil assembly 130. The moving component cooperates with the operating mechanism 12. When the coil assembly 130 is energized, the moving component triggers the operating mechanism 12 to trip. Typically, the shunt trip mechanism 13 is also used to drive the operating system 22 of the circuit breaker body 2 to trip, thereby realizing remote operation of the circuit breaker.

[0048] The improvement of this application is that, Figure 1 As shown, the moving component and auxiliary moving contact 141 of the shunt trip mechanism 13 are respectively connected to the first linkage 151 and the second linkage 152. The first linkage 151 and the second linkage 152 cooperate with the operating system 22. The shunt trip mechanism 13 triggers the operating mechanism 12 to trip, and the auxiliary moving contact 141 rotates to open the circuit as the operating mechanism 12 trips. The second linkage 152 triggers the operating system 22 to trip. Alternatively, the tripping system triggers the operating system 22 to trip. The tripping rotation of the operating system 22 drives the first linkage 151, and the moving component triggers the operating mechanism 12 to trip.

[0049] Thus, accessory module 1 and circuit breaker body 2 form a modular structure for assembly. Accessory module 1 and circuit breaker body 2 can be mutually driven to trip through first linkage 151 and second linkage 152. It has the advantages of simple structure, few linkage parts and high degree of modularity, which is conducive to assembly.

[0050] Specifically, such as Figure 8As shown, a first linkage hole a is provided on the side of the accessory housing 10 adjacent to the outer shell 20. The first linkage member 151 passes through the first linkage hole a and cooperates with the operating system 22. A second linkage hole b is provided on the side wall of the outer shell 20 adjacent to the accessory housing 10. The second linkage hole b allows the second linkage member 152 to pass through and cooperate with the operating system 22. Only two linkage holes are provided on the accessory housing 10 and the outer shell 20, which helps to ensure the sealing of the accessory module 1 and the circuit breaker body 2. Preferably, the movement trajectory of the first linkage member 151 is a straight line, which helps to reduce the space occupied by the movement stroke of the first linkage member 151. The movement trajectory of the first linkage member 151 can be limited by the first linkage hole a, which is a strip hole. The movement trajectory of the second linkage member 152 is an arc, that is, the movement trajectory of the second linkage member 152 in the second linkage hole b is an arc, which is an arc-shaped hole.

[0051] Furthermore, a splicing structure is provided between the accessory housing 10 and the outer shell 20. The splicing structure includes a mutually cooperating slot d and a buckle c, which has the advantage of convenient assembly and disassembly. Preferably, the buckle c is located on the side of the outer shell 20 and / or the accessory housing 10, and the slot d is opened on the side of the accessory housing 10 and / or the outer shell 20. Of course, the splicing structure can also be other structures, such as mutually cooperating slide rails and slide grooves.

[0052] Combination Figure 1-18 A specific embodiment of a circuit breaker is provided.

[0053] like Figure 1-8 As shown, the circuit breaker includes a circuit breaker body 2, which includes a housing 20. Typically, the housing 20 includes a base and a cover that covers the base. At least two pairs of wiring holes are provided at opposite ends of the base. For ease of description, the direction of the line connecting the cover to the base is taken as the first direction, and the direction of the line connecting each pair of wiring holes is taken as the second direction. Adjacent pairs of wiring holes are arranged side by side along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0054] like Figure 1-5As shown, a handle assembly 21 is rotatably mounted on the housing 20. One end of the handle assembly 21 extends out of the housing 20 through a handle hole provided on the housing 20, meaning the handle assembly 21 extends out of the housing 20 from the cover. The housing 20 houses an operating system 22, a tripping system, and at least two contact units 24. Each contact unit 24 is disposed within a base between a pair of wiring holes. The contact units 24 employ existing technology, with each pair of wiring terminals 241 of each contact unit 24 respectively engaging with one wiring hole of the base. That is, the pair of wiring terminals 241 are spaced apart in the second direction. The contact system of the contact unit 24... The contact system, located between a pair of terminals 241, includes a moving contact 242 and a stationary contact 243 that cooperate with each other. The moving contact 242 and the stationary contact 243 are electrically connected to the pair of terminals 241 to control the main circuit switching of each contact unit 24. In the first direction, the operating system 22 is located between the handle assembly 21 and the contact unit 24. The handle assembly 21, the operating system 22, and the moving contact 242 are sequentially linked. The leakage current trip unit 23 of the tripping system is arranged in parallel with the operating system 22 in the third direction. When a leakage current fault occurs, the leakage current trip unit 23 triggers the operating system 22 to trip.

[0055] like Figure 1 , 3As shown in Figure -5, the operating system 22 includes a fixed plate 227, a linkage assembly, and a release interlock assembly. The linkage assembly and the release interlock assembly are rotatably mounted on the fixed plate 227. Preferably, the handle assembly 21 is also mounted on the fixed plate 227. The handle assembly 21, the linkage assembly, and the release interlock assembly are sequentially linked, thereby forming a modular structure that facilitates its overall installation within the housing 20. The linkage assembly includes a linkage 221 and a lever 222. The release interlock assembly includes a pusher 223, a jumper 224, a first latch 225, and a second latch 226. One end of the linkage 221 is connected to the handle assembly 21. In the second direction, the pusher 223 and the jumper 224 are rotatably mounted within the housing 20 (fixed plate 227) on the same side of the handle assembly 21. The first latch 225 and the second latch 226 interlock and are rotatably mounted within the housing 20 (fixed plate 227) on the other side of the handle assembly 21. In the first direction, the pusher 223 and the second latch 226 are interlocked and rotatably mounted within the housing 20 (fixed plate 227) on the other side of the handle assembly 21. The buckle 226 is closer to the cover. One end of the pusher 223 extends in a third direction and engages with the push rod of the leakage current trip device 23. The middle part of the pusher 223 forms a latch arm in a second direction. The latch arm and the first engaging part 2262 of the second latch 226 latch together to form a second latch structure. One end of the jumper 224 latches with one end of the first latch 225 in a second direction to form a first latch structure. A protrusion 2221 is provided on one side of the lever 222. The other end of the connecting rod 221 is connected to the protrusion. Part 2221 is connected to and abuts against the jump buckle 224. Lever 222 is provided with mounting part 2222 for connecting moving contact 242. In this embodiment, lever 222 is provided with four mounting parts 2222. Each mounting part 2222 is connected to the moving contact 242 of a contact unit 24. Adjacent mounting parts 2222 are connected by a linkage shaft 2220. The linkage shaft 2220 is arranged in a direction parallel to the third direction. Protrusion 2221 is provided on one of the mounting parts 2222.

[0056] The structure and operation of the circuit breaker body 2 are existing technologies. When the residual current trip device 23 receives a control signal, it drives the push rod to strike the push member 223. The push member 223 rotates, causing the second latch structure to disintegrate. The rotating second latch 226 drives the first latch 225 to rotate, thereby causing the first latch structure to disintegrate. The trip latch 224 rotates and drives the lever 222 to separate the moving contact 242 from the stationary contact 243. The handle assembly 21 then rotates to the open position.

[0057] like Figure 8-18As shown, the circuit breaker also includes an accessory module 1. The accessory module 1 and the circuit breaker body 2 are assembled together along a third direction. The accessory module 1 includes an accessory housing 10. The accessory housing 10 is rotatably equipped with a handle mechanism 11, an operating mechanism 12, a contact mechanism, and a shunt trip mechanism 13. The handle mechanism 11, the operating mechanism 12 (contact mechanism), and the shunt trip mechanism 13 are arranged sequentially along the first direction. The handle mechanism 11 includes an auxiliary handle 111 and an auxiliary connecting rod 112. The auxiliary handle 11 is rotatably mounted on the accessory housing 10, and one end of the auxiliary connecting rod 112 is connected to the auxiliary handle 111. The operating mechanism 11... 2 includes an auxiliary lever 121 with a rotating assembly. An auxiliary latch 122 and an auxiliary lock 123 are rotatably mounted on the auxiliary lever 121. One end of an auxiliary connecting rod 112 is connected to the auxiliary latch 122 and cooperates with the auxiliary lever 121. One end of the auxiliary latch 122 and the auxiliary lock 123 are fastened together. The contact mechanism includes an auxiliary stationary contact 142 and an auxiliary moving contact 141 that cooperate with each other. The auxiliary moving contact 141 is driven by the auxiliary lever 121. The auxiliary stationary contact 142 and the operating mechanism 12 are spaced apart in a second direction, and the auxiliary moving contact 141 and the auxiliary stationary contact 142 are spaced apart and opposite each other in a first direction. Figure 10-13 In the middle, the auxiliary moving contact 141 is roughly parallel to the second direction. The operating handle mechanism 11 can drive the auxiliary moving contact 141 to move closer to or away from the auxiliary stationary contact 142, thereby realizing the opening and closing of the accessory module 1.

[0058] like Figure 10 , 12 As shown, the shunt trip mechanism 13 is disposed on one side of the operating mechanism 12 and is used to trigger the operating mechanism 12 to trip. When the shunt trip mechanism 13 receives a control command, it triggers the operating mechanism 12 to trip. Specifically, the shunt trip mechanism 13 includes a coil assembly 130, a magnetic conductor 133, and a moving assembly. When the coil assembly 130 is energized, the coil assembly 130 and the magnetic conductor 133 cooperate to form a magnetic field to drive the moving assembly. The moving assembly cooperates with the other end of the auxiliary latch 123, and the moving assembly drives the auxiliary latch 123 to rotate, thereby causing the operating mechanism 12 to trip.

[0059] When accessory module 1 is assembled with circuit breaker body 2, the circuit breaker as a whole has the function of remote operation. That is, after accessory module 1 receives a trip signal, the operating mechanism 12 of accessory module 1 will trip first and then drive the operating system 22 of circuit breaker body 2 to trip. When circuit breaker body 2 receives a trip signal, the operating system 22 of circuit breaker body 2 will trip first and then drive the operating mechanism 12 of accessory module 1 to trip.

[0060] Specifically, such as Figure 8 , 13As shown in Figure 15, the moving component is provided with a first linkage member 151, and the auxiliary moving contact 141 is provided with a second linkage member 152. The first linkage member 151 and the second linkage member 152 extend out of the accessory housing 10 from the same side wall. In this embodiment, the central axes of the first linkage member 151 and the second linkage member 152 are parallel to a third direction. When the accessory module 1 is assembled with the circuit breaker body 2, the first linkage member 151 and the second linkage member 152 respectively cooperate with the operating system 22 of the circuit breaker body 2. Correspondingly, a first linkage hole a is provided on the side of the accessory housing 10 adjacent to the outer shell 20, and a second linkage hole b is provided on the side of the accessory housing 10 adjacent to the outer shell 20. The first linkage member 151 and the second linkage member 152 respectively pass through the first linkage hole a and the second linkage hole b to cooperate with the operating system 22.

[0061] The process of the circuit breaker body 2 being tripped by the accessory module 1 is as follows: after the shunt tripping mechanism 13 triggers the operating mechanism 12 of the accessory module 1 to trip, the auxiliary moving contact 141 rotates with the tripping opening of the operating mechanism 12, and the operating system 22 is triggered to trip by the second linkage 152; the process of the accessory module 1 being tripped by the circuit breaker body 2 is as follows: after the leakage current trip unit 23 of the tripping system drives the operating system 22 to trip, the tripping rotation of the operating system 22 drives the first linkage 151, and the moving component triggers the operating mechanism 12 to trip.

[0062] In this embodiment, the first linkage 151 engages with the snap fastener in the operating system 22, and the second linkage 152 engages with the second latch 226 in the operating system 22. When the operating mechanism 12 is disengaged, the second linkage 152 pushes the second latch 226 to rotate, unlocking the second latch structure formed by the second latch 226 and the pusher 223. Simultaneously, the rotation of the second latch 226 drives the first latch 225 to rotate, unlocking the first latch structure formed by the snap fastener 224 and the first latch 225, thus disengaging the operating system 22. When the operating system 22 is disengaged, the rotation of the snap fastener 224 drives the first linkage 151 to move, which in turn drives the moving component to rotate the auxiliary latch 123, causing the latch engagement formed by the auxiliary snap fastener 122 and the auxiliary latch 123 to disintegrate, thus disengaging the operating mechanism 12. Of course, the second linkage 152 can also engage with the first latch 225.

[0063] In this embodiment, the modification to the existing circuit breaker body 2 is minor, preferably as follows: Figure 8 As shown, a splicing structure is provided between the outer shell 20 and the accessory shell 10. The splicing structure includes mutually cooperating buckles c and slots d, wherein the number of buckles c and slots d are matched and there are multiple of them. Figure 8In the case of the outer shell 20, at least one slot d is provided on the side of the outer shell 20, and a buckle c matching the slot d is provided on the accessory housing 10; a first linkage hole a and a second linkage hole b are respectively provided on the side of the outer shell 20 facing the accessory module 1.

[0064] Furthermore, the second latch 226 is improved, such as... Figure 7 As shown, the second latch 226 includes a rotating shaft body for rotational assembly. The circumferential sidewall of the shaft body has an engagement groove 2261 for engaging with the first latch 225. The two ends of the shaft body are provided with a first engaging part 2262 and a second engaging part 2263. The first engaging part 2262 engages with the pusher 223, and the second engaging part 2263 engages with the second linkage 152. In the figure, the second engaging part 2263 is a bent rod structure. Compared with the existing second latch 226, only the second engaging part 2263 is added, and the degree of modification to the second latch 226 is small. Compared with the operating system 22, only one second latch 226 needs to be replaced, which is conducive to the modification of the existing product. Of course, if the existing second latch 226 has a protruding structure that can engage with the second linkage 152, the second latch 226 may not need to be modified.

[0065] The fixing plate 227 is modified by providing holes for the first linkage 151 and the second linkage 152 to pass through. Of course, if the areas corresponding to the first linkage 151 and the second linkage 152 are hollow areas, the fixing plate 227 can remain unchanged. Figure 3 In the middle, a third linkage hole 2271 is provided in the area corresponding to the first linkage member 151, and the diameter of the third linkage hole 2271 is greater than or equal to the diameter of the first linkage hole a.

[0066] Combination Figure 14 The present embodiment provides a structure for an auxiliary moving contact 141, which includes an auxiliary support 1411 and a moving contact piece 1412. The auxiliary support 1411 has a straight plate structure. One end of the auxiliary support 1411 is driven and engaged with the auxiliary lever 121 of the operating mechanism 12. The other end of the auxiliary support 1411 is provided with a second linkage member 152, which is a rod. The moving contact piece 1412 is attached to the plate surface of the auxiliary support 1411. That is, the moving contact piece 1412 and the second linkage member 152 are respectively located on two adjacent planes of the auxiliary support 1411. The end of the moving contact piece 1412 away from the auxiliary lever 121 is provided with an auxiliary moving contact point 1413, thereby giving the trip trip mechanism 13 more space for assembly and a reasonable layout.

[0067] In this embodiment, as Figure 10 , 12As shown in Figures 15-18, the shunt trip mechanism 13 includes a coil assembly 130, a magnetic conductor 133, and a moving assembly. Similar to existing structures, the two opposite ends of the coil assembly 130 serve as a driving end and a connecting end, respectively. The line connecting the driving end and the connecting end is parallel to the second direction. The magnetic conductor 133 is arranged around the outside of the coil assembly 130, and a notch is provided on the side of the magnetic conductor 133 opposite to the driving end. The moving assembly includes an armature 134 and a reset member 135 that drives the armature 134 to reset. In this embodiment, the auxiliary latch 123 is rotated by the end of the armature 134 near the operating mechanism 12. The first linkage member 151 is a rod structure along the third direction. The orientation is set on the side wall of the armature 134, wherein the armature 134 is rotatably mounted on the outside of the magnetic conductor 133 and spaced apart from the driving end. That is, the armature 134 includes an attraction area 1340, one end of which is connected to a rotating end 1341, which is rotatably connected to the outside of the magnetic conductor 133. The attraction area 1340 and the driving end are spaced apart and have a gap between them. The other end of the attraction area 1340 is connected to a moving end 1342, and the extension direction of the moving end 1342 forms an angle with the extension direction of the attraction area 1340. Preferably, the angle between the moving end 1342 and the extension direction of the attraction area 1340 is close to 90°. Figure 10 , 12 In this process, the moving trajectory of the mobile end 1342 is parallel to the second direction. The end of the mobile end 1342 away from the attraction area 1340 is opposite to the operating mechanism 12 and is used to trigger the operating mechanism 12 to trip. The mobile end 1342 moves in a straight line along the outer side of the magnetic conductor 133. The moving process occupies little space and the moving stroke is controllable, which improves the reliability of the coordination between the shunt tripping mechanism 13 and other components.

[0068] Preferably, in this embodiment, the movement trajectory of the first linkage member 151 is a straight line, and its movement trajectory is parallel to the second direction. The movement trajectory of the first linkage member 151 is limited by the first linkage hole a, wherein the first linkage hole a is a strip hole and the strip hole is opened along the second direction. The movement trajectory of the second linkage member 152 is arc-shaped, and correspondingly, the second linkage hole b is an arc-shaped hole. The movement trajectory of the second linkage member 152 is limited by the second linkage hole b. The first linkage hole a and the second linkage hole b are spaced apart in the second direction to avoid mutual interference between the first linkage member 151 and the second linkage member 152.

[0069] Furthermore, the movement trajectory of the first linkage member 151 can also be limited by the cooperation between the moving component and the first linkage hole a, avoiding excessive wear of the first linkage member 151 due to unbalanced force caused by limiting the first linkage member 151 solely by the first linkage hole a. Specifically, the other end of the attraction area 1340 is connected to a moving end 1342, and the extension direction of the moving end 1342 forms an angle with the extension direction of the attraction area 1340, so that the moving end 1342 slides and moves linearly with the edge of the magnetic conductor 133 outside the notch. The moving end 1342 of the armature 134 moves linearly along the outside of the magnetic conductor 133, so that the moving end 1342 occupies little space and the movement stroke is controllable, improving the reliability of the cooperation between the shunt trip mechanism 13 and other components. Preferably, the moving end 1342 is provided with a sliding groove, and the edge of the magnetic conductor 133 slides and cooperates with the sliding groove, which can further improve the stability of the cooperation and reduce the size.

[0070] Combination Figure 10 , 12 13 and 15-18 provide a specific structure for the shunt trip mechanism 13.

[0071] The shunt trip mechanism 13 includes a coil assembly 130, a magnetic conductor 133, and an armature 134. The two ends of the coil assembly 130 are respectively the driving end and the connecting end. The coil assembly 130 includes a coil frame 132 and an electromagnetic coil 131 wound around the outside of the coil frame 132. The coil assembly 130 can adopt existing technology.

[0072] like Figure 16 , 18 As shown, the magnetic guide 133 is disposed around the outside of the coil assembly 130. A notch is provided on the side of the magnetic guide 133 opposite to the driving end. The magnetic guide 133 is an integral structure, including a U-shaped magnetic guide frame and a limiting arm 1332. The opening of the U-shaped magnetic guide frame serves as the notch. A connecting portion 1331 extends from the side of the U-shaped magnetic guide frame facing the notch, extending parallel to the central axis of the notch. The connecting portion 1331 passes through the middle of the coil frame 132 in the direction from the connecting end to the driving end. The limiting arm 1332 is connected to one side of the notch, preferably as follows: Figure 16 , 18 As shown, the limiting arm 1332 is inclined and opposite to the connecting part 1331. One end of the limiting arm 1332 extends beyond the U-shaped magnetic guide frame, where it is connected to the notch.

[0073] like Figure 10 , 12As shown in Figures 13 and 15-18, the armature 134 includes a rotating end 1341, a suction area 1340, and a moving end 1342 connected in sequence. The moving end 1342 is set at an angle to the extending direction of the suction area 1340, and the angle is approximately 90°, making the armature 134 as a whole L-shaped. The armature 134 is rotatably mounted on one side of the notch via the rotating end 1341. The moving end 1342 is set along the outside of the magnetic guide 133, and its end is opposite to the auxiliary latch 123 of the operating mechanism 12. In the figures, a groove is opened on the side of the moving end 1342 facing the magnetic guide 133. The edge can be accommodated in the groove and slide in cooperation with the groove. The first linkage 151 is connected to the side of the moving end 1342. The first linkage 151 and the first linkage hole a, the moving end 1342 and the magnetic conductor 133 cooperate to move linearly. When the attraction area 1340 is close to the notch, the limiting arm 1332 abuts against the attraction area 1340 to limit the swing range of the armature 134. Preferably, a limiting groove is opened in the attraction area 1340. When the attraction area 1340 is close to the notch, the limiting arm 1332 slides into the limiting groove, further reducing the swing range of the armature 134 and helping to reduce the overall volume.

[0074] Furthermore, Figure 16 and 18 In the middle, the portion of the limiting arm 1332 extending beyond the U-shaped magnetic guide frame is adjacent to the rotating end 1341 of the armature 134. During the rotation of the armature 134, at least part of the attraction area 1340 remains connected to the limiting arm 1332, thereby eliminating the need for a bracket. Thus, the armature 134 can be directly rotatably connected to the accessory housing 10. That is, the armature 134 is rotatably engaged with at least one side wall of the accessory housing 10. Preferably, a support groove is provided on the inner side of the accessory housing 10, and the armature 134 is directly rotatably assembled in the support groove, thereby eliminating the need for a bracket and saving parts and space.

[0075] A reset member 135 is connected to the side of the armature 134 facing away from the notch. The reset member 135 provides a reset driving force to the armature 134, such as... Figure 15-18 As shown, the reset member 135 includes an elastic plate. The middle of the elastic plate is bent, making the elastic plate appear V-shaped. One end of the elastic plate is attached to the side of the armature 134 opposite to the notch and is fixedly connected to the armature 134. The other end of the elastic plate is fixedly connected to or abuts against the armature. Preferably, an abutting boss 103 can also be provided inside the accessory housing 10, and the other end of the reset member 135 abuts against the abutting boss 103. Alternatively, the reset member 135 can be a spring.

[0076] In this embodiment, as Figure 12 , 13As shown, the accessory housing 10 has multiple protruding limiting bosses 101. At least one limiting boss 101 abuts against the side of the auxiliary moving contact 141 opposite to the auxiliary stationary contact 142. At least two limiting bosses 101 are spaced apart to limit the opposite ends of the shunt tripping mechanism 13. Figure 13 In the middle, one of the limiting bosses 101 and the auxiliary stationary contact 142 are spaced apart in the first direction, and the auxiliary moving contact 141 swings between the limiting boss 101 and the auxiliary stationary contact 142. Figure 12 In the middle of the accessory housing 10, two limiting bosses 101 are located in the middle and are spaced apart from each other in the second direction. The shunt tripping mechanism 13 is limited between the two limiting bosses 101. Preferably, one of the limiting bosses 101 can abut against one end of the armature 134 opposite to the coil assembly 130.

[0077] In addition, such as Figure 9 As shown, at least one end of the accessory housing 10 is provided with a connector 16. The accessory housing 10 has a wiring hole corresponding to the connector 16. The number of connectors 16 is at least two. Preferably, all connectors 16 are provided at the same end of the accessory housing 10 and the shunt trip mechanism 13 is spaced apart from the connectors 16 in the second direction. Further, a partition plate 102 is provided inside the accessory housing 10. In the third direction, the partition plate 102 divides one end of the accessory housing 10 into two wiring cavities. At least one connector 16 is provided in each wiring cavity. In this embodiment, three connectors 16 are provided inside the accessory housing 10, of which two connectors 16 are provided in one wiring cavity and the two connectors 16 are spaced apart along the first direction, and the other connector 16 is located in the other wiring cavity.

[0078] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0079] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. Circuit breaker, including the circuit breaker body (2) and accessory modules (1) assembled together; The circuit breaker body (2) includes a housing (20) and an operating system (22) and a tripping system disposed within the housing (20); the operating system (22) includes a tripping interlocking assembly, which includes a pusher (223), a trip latch (224), a first latch (225), and a second latch (226). The pusher (223) and the trip latch (224) are rotatably mounted on one side of the housing (20), and the first latch (225) and the second latch (226) are interlocked and rotatably mounted on the other side of the housing (20). The first latch (225) and the trip latch (224) are fastened together, and the second latch (226) and the pusher (223) are fastened together. The pusher (223) is engaged with the leakage current trip unit (23) of the tripping system. The accessory module (1) includes an accessory housing (10), an operating mechanism (12), a contact mechanism, and a shunt tripping mechanism (13) disposed within the accessory housing (10); the operating mechanism (12) includes a rotatably mounted auxiliary lever (121), which drives and cooperates with an auxiliary moving contact (141), and an auxiliary jump buckle (122) and an auxiliary lock buckle (123) are rotatably mounted on the auxiliary lever (121), one end of the auxiliary jump buckle (122) and the auxiliary lock buckle (123) are fastened together, and the other end of the auxiliary lock buckle (123) cooperates with the moving component of the shunt tripping mechanism (13); the contact mechanism includes an auxiliary moving contact (141) and an auxiliary stationary contact (142) that cooperate with each other, the auxiliary moving contact (141) is linked to the operating mechanism (12), and the shunt tripping mechanism (13) is used to trigger the operating mechanism (12) to trip; Its features are: The moving component and the auxiliary moving contact (141) are respectively connected to a first linkage (151) and a second linkage (152). The first linkage (151) and the second linkage (152) cooperate with the operating system (22). The shunt tripping mechanism (13) triggers the operating mechanism (12) to trip, and the auxiliary moving contact (141) rotates to open the circuit as the operating mechanism (12) trips. The second linkage (152) pushes the second latch (226) to trigger the operating system (22) to trip. Alternatively, the tripping system triggers the operating system (22) to trip, and the tripping latch (224) drives the first linkage (151), which in turn triggers the operating mechanism (12) to trip.

2. The circuit breaker according to claim 1, characterized in that: The movement trajectory of the first linkage (151) is a straight line.

3. The circuit breaker according to claim 2, characterized in that: The accessory housing (10) and the outer shell (20) are each provided with a first linkage hole (a), and the first linkage member (151) passes through the first linkage hole (a), and the first linkage hole (a) restricts the movement trajectory of the first linkage member (151).

4. The circuit breaker according to claim 1, characterized in that: The outer shell (20) and the accessory shell (10) are provided with a second linkage hole (b) on their adjacent side walls. The second linkage hole (b) is for the second linkage member (152) to pass through. The movement trajectory of the second linkage member (152) in the second linkage hole (b) is an arc.

5. The circuit breaker according to claim 1, characterized in that: A splicing structure is provided between the outer shell (20) and the accessory shell (10), the splicing structure including a slot (d) and a buckle (c) that cooperate with each other.

6. The circuit breaker according to claim 1, characterized in that: The auxiliary moving contact (141) includes an auxiliary support (1411), one end of which is linked to the operating mechanism (12), and the other end of the auxiliary support (1411) is provided with a second linkage member (152). A moving contact piece (1412) is provided on the auxiliary support (1411) adjacent to the second linkage member (152), and an auxiliary moving contact point (1413) is provided at the end of the moving contact piece (1412) away from the auxiliary lever (121).

7. The circuit breaker according to claim 1, characterized in that: The shunt trip mechanism (13) includes a coil assembly (130) and a magnetic conductor (133). The coil assembly (130) and the magnetic conductor (133) cooperate to generate a magnetic field to drive the moving assembly. The moving assembly includes an armature (134) and a reset member (135). The armature (134) is rotatably mounted and provided with a first linkage member (151). The reset member (135) cooperates with the armature (134) to provide a reset force for the armature (134).

8. The circuit breaker according to claim 1, characterized in that: The second latch (226) includes a rotating shaft body that is rotatably assembled. The circumferential sidewall of the rotating shaft body is provided with an engagement groove (2261). The two ends of the rotating shaft body are provided with a first mating part (2262) and a second mating part (2263). The first mating part (2262) is engaged with the pusher (223), and the second mating part (2263) is engaged with the second linkage (152).

9. The circuit breaker according to claim 1, characterized in that: The operating system (22) includes a fixed plate (227) and a linkage assembly. The linkage assembly and the release interlock assembly are rotatably mounted on the same side of the fixed plate (227) and are sequentially linked.

10. The circuit breaker according to claim 9, characterized in that: The fixing plate (227) has a third linkage hole (2271), which corresponds to the first linkage hole (a) opened in the accessory housing (10) and the outer shell (20). The first linkage member (151) passes through the first linkage hole (a) and the third linkage hole (2271) and cooperates with the operating system (22).

11. The circuit breaker according to claim 1, characterized in that: The outer shell (20) is rotatably equipped with a handle assembly (21), the handle assembly (21) is linked to the operating system (22), the accessory shell (10) is rotatably equipped with a handle mechanism (11), the handle mechanism (11) is linked to the operating mechanism (12), and the handle mechanism (11) is linked to the handle assembly (21).

12. The circuit breaker according to claim 1, characterized in that: The circuit breaker body (2) includes at least one contact unit (24). The contact unit (24) includes a pair of terminals (241) and a contact system. The contact system is disposed between the pair of terminals (241). The contact system includes a moving contact (242) and a stationary contact (243) that cooperate with each other. The moving contact (242) is linked to the operating system (22). The stationary contact (243) is fixedly disposed inside the housing (20).

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