Wiring terminal and circuit breaker

Abstract

The wiring terminal comprises a wiring frame and an insulating part, a screw hole is formed in the top wall of the wiring frame, a wiring screw and a head for screwing the wiring screw are assembled in the screw hole, the wiring frame comprises a top wall, a bottom wall arranged opposite to the top wall and a connecting wall connected between the top wall and the bottom wall, a mounting groove is formed in the connecting wall, and the insulating part is arranged in the mounting groove. The insulating part comprises a bearing plate, the bearing plate is arranged on the side, back to the top wall, of the bottom wall in an attached mode, the bearing plate is provided with a mounting part, the mounting part extends in the direction close to the top wall and is embedded in the mounting groove, and a baffle is at least arranged on the edge of one side of the bearing plate. The side, back to the top wall, of the baffle extends in the direction away from the bottom wall. According to the utility model, the insulating part is arranged in the wiring terminal to avoid the risk of finger contact, and the mounting part of the insulating part is embedded with the connecting wall of the wiring frame, so that the assembly structure is simplified, the cost is reduced, and the matching stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a terminal block and a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions and closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Currently, circuit breakers have the following defects: First, the terminals are not equipped with finger-proof protective covers, resulting in a large gap below the terminals after wiring, which easily leads to finger-proof risks; Second, some terminals are equipped with finger-proof protective covers, but their structure is complex, production costs are high, and assembly is not conducive; Third, existing circuit breakers usually have leakage current protection functions, which are usually completed by the cooperation of current transformers, circuit boards, tripping devices, and leakage current testing mechanisms. These components are numerous, which easily increases the overall thickness of the circuit breaker. Summary of the Invention

[0003] The purpose of this utility model is to overcome at least one defect of the prior art and provide a wiring terminal and a circuit breaker.

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

[0005] This utility model provides a terminal block, including a terminal frame and an insulating component. The top wall of the terminal frame has a screw hole, and a terminal screw is installed in the screw hole. Tightening the head of the terminal screw can drive the terminal frame to slide within the housing towards or away from the head of the terminal screw. The terminal frame includes a top wall, a bottom wall opposite to the top wall, and a connecting wall connecting the top wall and the bottom wall. The connecting wall has a mounting groove, which is parallel to the central axis of the terminal screw. The insulating component includes a support plate, which is fitted against the bottom wall on the side away from the top wall. The support plate has a mounting part, which extends towards the top wall and is embedded in the mounting groove. At least one edge of the support plate has a baffle, which extends away from the bottom wall on the side away from the top wall.

[0006] Furthermore, one end of the mounting groove is provided with an opening that connects to the bottom wall, the other end of the mounting groove is close to the top wall, and the length of the mounting groove is greater than half the length of the connecting wall.

[0007] Furthermore, the mounting groove includes an anti-detachment area, the inner diameter of which is larger than the inner diameter of the mounting groove, and the mounting part is provided with an anti-detachment part that cooperates with the anti-detachment area.

[0008] Furthermore, the anti-detachment area is located at one end of the mounting groove near the top wall, and the anti-detachment part is located at the end of the mounting part away from the support plate.

[0009] Furthermore, a positioning structure is provided between the bottom wall and the support plate. The positioning structure includes a positioning part and a positioning groove that are interlocked with each other. The positioning part is disposed on the bottom wall and / or the support plate, and the positioning groove is formed in the support plate and / or the bottom wall.

[0010] Furthermore, it also includes a wire clamping plate, which includes a first plate and a second plate spaced apart from each other. A connecting plate connects the first plate and the second plate. The first plate is located on the top wall side facing away from the bottom wall. The middle of the first plate has a screw hole for the wiring screw to pass through. The second plate is located inside the wiring frame and is spaced apart from the tail of the wiring screw. The connecting plate corresponds to the space between the two connecting walls.

[0011] Furthermore, the support plate is provided with a baffle, and the baffle and the connecting plate correspond to opposite sides of the wiring frame, respectively.

[0012] Furthermore, the wiring frame is formed by bending a conductive plate into a square frame structure. The top wall is formed by stacking the two ends of the conductive plate. A screw hole is opened in the middle of the top wall. The connecting wall between the top wall and the bottom wall is provided with a strip-shaped mounting groove. One end of the mounting groove is connected to the edge of the bottom wall. The inner diameter of the other end of the mounting groove is increased to form an anti-detachment area. A positioning groove is opened in the middle of the bottom wall. Multiple grooves are provided on the side of the bottom wall facing the top wall.

[0013] Furthermore, the insulating component includes a rectangular support plate, one side edge of which is bent and extended to form a baffle, the baffle being perpendicular to the surface of the support plate. A straight rod-shaped mounting portion is provided in the middle of the two edges of the support plate adjacent to the baffle. Each mounting portion is perpendicular to the surface of the support plate on the side facing away from the baffle. The end of each mounting portion away from the support plate is enlarged to form an anti-detachment portion. A positioning portion is provided in the middle of the support plate, the positioning portion protruding and extending on the side facing away from the baffle.

[0014] This utility model also provides a circuit breaker, including a housing, wherein at least a pair of spaced-apart terminal slots are provided inside the housing, and each terminal slot is provided with an operating hole and a wiring port. The feature is that: each terminal slot is provided with a wiring terminal as described above, the wiring frame is opposite to the wiring port, the head of the wiring screw is opposite to the operating hole, the baffle is adjacent to the wiring port and located on the side of the terminal slot away from the operating hole, the wiring screw is rotatably disposed in the terminal slot, and the wiring frame can move up and down in the terminal slot.

[0015] Preferably, each pair of terminals is connected to a main circuit of one phase, and each main circuit of one phase is connected to a contact mechanism. The contact mechanism includes a moving contact and a stationary contact that cooperate with each other. One end of the stationary contact is connected to the adjacent terminal, and the other end is spaced apart from the baffle.

[0016] Preferably, the housing is further provided with a leakage current protection module, which is distributed within the housing. The leakage current protection module includes a current transformer, which is coupled to all main lines and arranged side by side with the contact mechanism between each pair of terminals.

[0017] Preferably, the internal space of the housing is divided into at least two parallel assembly cavities, each assembly cavity is provided with a main line of one phase, and the current transformer is disposed throughout all the assembly cavities.

[0018] Preferably, all main circuits include at least one phase L-pole main circuit and at least one phase N-pole main circuit, and the leakage protection module further includes a tripping device, which is disposed in the same assembly cavity as the N-pole main circuit.

[0019] Preferably, the housing is further provided with a slot above the wiring port, the slot corresponding to the space between the head of the wiring screw and the top wall of the wiring frame, so that a second wiring structure is formed between the head of the wiring screw and the wiring frame.

[0020] The present invention relates to a wiring terminal and a circuit breaker. The wiring terminal is equipped with an insulating component to avoid the risk of finger contact. The mounting part of the insulating component is embedded in the connecting wall of the wiring frame, which simplifies the assembly structure, reduces costs, and improves the stability of the fit.

[0021] In addition, the length of the mounting groove and the mounting part that mates with the mounting groove is greater than half the length of the connecting wall. By increasing the mating area of ​​the two, it is beneficial to improve the mating stability of the insulation component and the terminal block.

[0022] In addition, by changing the inner diameter of the mounting groove to form an anti-detachment area, the anti-detachment part of the mounting part cooperates with the anti-detachment area to achieve anti-detachment, preventing the mounting part from falling off from the anti-detachment area and improving the stability of the fit.

[0023] In addition, the leakage protection module in the circuit breaker is distributed, with the current transformer running through all the assembly cavities. In particular, the tripping device and the N-pole main line are configured in the same assembly cavity to avoid increasing the thickness of the circuit breaker. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the circuit breaker of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker of this utility model. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the internal structure of the circuit breaker of this utility model. Figure 2 ;

[0027] Figure 4This is a cross-sectional view of the outer casing after the wiring terminals and contact mechanism are assembled in this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the wiring terminal in this utility model;

[0029] Figure 6 This is an exploded view of the wiring terminals in this utility model;

[0030] Figure 7 This is a schematic diagram of the wiring frame in this utility model;

[0031] Figure 8 This is a schematic diagram of the insulating component in this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the voltage plate in this utility model;

[0033] Figure label:

[0034] 1-Outer casing, 101-Operating hole, 102-Wiring port, 11-Base, 111-Transformer mating groove, 112-Strip groove, 113-Slot, 12-Cover, 2-Terminal, 20-Screw hole, 21-Wire frame, 211-Top wall, 212-Bottom wall, 213-Connecting wall, 214-Mounting groove, 2141-Anti-disengagement area, 215-Groove, 22-Wire screw, 23-Wire clamping plate, 231-First plate, 232-Second plate, 233-Connecting plate, 24-Insulating component, 241-Bearing plate, 242-Baffle, 243-Mounting part, 244-Positioning part, 245-Anti-disengagement part, 3-Handle mechanism, 4-Operating mechanism, 51-Moving contact, 52-Stationary contact, 61-Transformer, 62-Trip device, 63-Test button, 64-Test resistor. Detailed Implementation

[0035] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the wiring terminals and circuit breakers of this utility model. The wiring terminals and circuit breakers of this utility model are not limited to the descriptions in the following embodiments.

[0036] like Figure 1-4 As shown, the circuit breaker includes a housing 1, and at least one pair of terminals 2 are provided inside the housing 1. Each pair of terminals 2 is spaced apart at opposite ends inside the housing 1, and a main line of one phase is connected between each pair of terminals 2. Typically, all main lines inside the housing 1 include at least one phase L-pole main line and at least one phase N-pole main line. Each terminal 2 corresponds to a wiring port 102 and an operation hole 101 opened on the housing 1, so as to facilitate the connection of external wires to each terminal 2.

[0037] Specifically, each terminal block 2 includes a wiring frame 21, which mates with the operating hole 101 and the wiring port 102. A screw hole 20 is provided on the top wall 211 of the wiring frame 21, and a wiring screw 22 is installed in the screw hole 20. The head of the wiring screw 22 is located outside the wiring frame 21, that is, the head of the wiring screw 22 is on the side of the top wall 211 facing the operating hole 101. The head of the wiring screw 22 can be screwed through the operating hole 101, which can drive the wiring frame 21 to slide closer to or away from the head of the wiring screw 22 in the housing 1, and cause the tail of the wiring screw 22 to move between the top wall 211 and the bottom wall 212 of the wiring frame 21. The external wire extends into the wiring frame 21 from the wiring port 102, and the external wire is pressed by the tail of the wiring screw 22 and the bottom wall 212 of the wiring frame 21. Of course, a pressure plate 23 for pressing the wire can also be provided in each wiring frame 21. Furthermore, each terminal 2 is also equipped with an insulator 24, which is usually located below the wiring frame 21. The insulator 24 blocks the space after the wiring frame 21 moves upward, preventing external wires from extending into the circuit breaker from the wiring port 102, thereby avoiding the risk of electric shock.

[0038] like Figure 4-8 As shown, the improvement of this application is that the wiring frame 21 includes a top wall 211, a bottom wall 212 opposite to the top wall 211, and a connecting wall 213 connecting the top wall 211 and the bottom wall 212. The connecting wall 213 connecting the top wall 211 and the bottom wall 212 in the wiring frame 21 has a mounting groove 214. The mounting groove 214 is parallel to the central axis of the wiring screw 22. The insulating member 24 includes a support plate 241. The support plate 241 is fitted to the side of the bottom wall 212 opposite to the top wall 211. The support plate 241 has a mounting part 243. The mounting part 243 extends towards the top wall 211 and is embedded in the mounting groove 214. At least one edge of the support plate 241 has a baffle 242. The baffle 242 extends away from the bottom wall 212 on the side opposite to the top wall 211. In this way, the mounting part 243 of the insulating component 24 is embedded in the connecting wall 213 of the wiring frame 21, which simplifies the assembly structure, reduces costs and improves the stability of the fit.

[0039] Furthermore, one end of the mounting groove 214 is provided with an opening that connects to the bottom wall 212, and the other end of the mounting groove 214 is close to the top wall 211. The length of the mounting groove 214 is greater than half the length of the connecting wall 213. Correspondingly, the length of the mounting part 243 that is embedded in the mounting groove 214 is also increased. By using a longer mounting groove 214 and mounting part 243, the embedding and mating area of ​​the two is extended, which is conducive to improving the mating stability of the insulating component 24 and the terminal 2.

[0040] Furthermore, the mounting groove 214 includes an anti-detachment area 2141, the inner diameter of which is larger than the inner diameter of the mounting groove 214. By changing the inner diameter of the mounting groove 214, the anti-detachment area 2141 is formed, which has the advantages of simple process, convenient operation and low cost. Correspondingly, the mounting part 243 is provided with an anti-detachment part 245 that cooperates with the anti-detachment area 2141. Preferably, the shapes of the anti-detachment area 2141 and the anti-detachment part 245 match each other, thereby preventing the insulating component 24 from falling off the wiring frame 21. The anti-detachment area 2141 can be located at the end of the mounting groove 214 or in the middle of the mounting groove 214. Preferably, the anti-detachment area 2141 is located at the end of the mounting groove 214 near the top wall 211.

[0041] In addition, a positioning structure is provided between the bottom wall 212 and the support plate 241. The positioning structure includes a positioning part 244 and a positioning groove that are interlocked. The positioning part 244 is disposed on the bottom wall 212 and / or the support plate 241. The positioning part 244 is fitted on the bottom wall 212 and / or the support plate 241. Preferably, the shapes of the positioning part 244 and the positioning groove match each other. The positioning part 244 can be a boss with a regular shape or an irregular shape.

[0042] A specific embodiment of a circuit breaker is provided in conjunction with 1-9.

[0043] like Figure 1-4 As shown, the circuit breaker includes a housing 1. At least one pair of terminal slots are provided inside both ends of the housing 1. Each terminal slot is equipped with a wiring terminal 2. Each pair of wiring terminals 2 is connected to a phase main line. Each terminal slot is provided with an operation hole 101 and a wiring port 102. The operation hole 101 and the wiring port 102 communicate with the outside from two adjacent side walls of the housing 1. In this embodiment, the housing 1 is composed of a base 11 and a cover 12 covering the base 11. The main body of the terminal slot is located at opposite ends of the base 11. The wiring port 102 is opened on the base 11. The operation hole 101 is correspondingly opened on the cover 12. In addition, the cover 12 is also provided with a handle hole and a button hole.

[0044] The internal space of the housing 1 is divided into at least two parallel assembly cavities. Each assembly cavity contains at least one main line. All main lines include at least one L-pole main line and at least one N-pole main line. In this embodiment, the housing 1 contains two parallel assembly cavities. One assembly cavity is used to set the L-pole main line, and the other assembly cavity is used to set the N-pole main line. Each main line is connected to an external wire through a terminal block 2 located in a terminal slot.

[0045] like Figure 4-8As shown, each terminal 2 disposed in the terminal slot includes a wiring frame 21 and an insulating member 24. The wiring frame 21 includes a top wall 211 and a bottom wall 212 spaced apart from each other. The bottom wall 212 and the top wall 211 are connected by a connecting wall 213 to form a frame structure. A screw hole 20 is provided in the top wall 211 of the wiring frame 21, and a wiring screw 22 is disposed in the screw hole 20. The head of the wiring screw 22 is located in the terminal slot and is opposite to the operating hole 101. The wiring screw 22 is rotatably disposed in the terminal slot. The wiring screw 22 can rotate, but the head of the wiring screw 22 is limited so that the wiring screw 22 cannot move up and down. The wiring frame 21 can move up and down in the terminal slot. Operating the head of the wiring screw 22 can rotate the wiring screw 22, causing the wiring frame 21 to move up and down in the terminal slot, and causing the tail of the wiring screw 22 to move between the top wall 211 and the bottom wall 212. In this embodiment, as shown... Figure 5 , 6 As shown in Figure 9, the junction box 21 may also be equipped with a wire clamping plate 23, which extends between the bottom wall 212 and the tail end of the wiring screw 22. The tail end of the wiring screw 22 cooperates with the wire clamping plate 23 to clamp the external wires extending into the junction box 21.

[0046] A mounting groove 214 is provided on the connecting wall 213 of the wiring frame 21. The mounting groove 214 is parallel to the central axis of the wiring screw 22. The insulating component 24 includes a support plate 241, which is fitted to the side of the bottom wall 212 opposite to the top wall 211. The support plate 241 has a mounting part 243, which extends towards the top wall 211 and is embedded in the mounting groove 214. Preferably, the thickness of the mounting part 243 is equal to the depth of the mounting groove 214. After the mounting part 243 is installed, it is flush with the surface of the connecting wall 213. At least one edge of the support plate 241 is provided with a baffle 242. In this embodiment, the baffle 242 is only provided on one edge of the support plate 241. The baffle 242 extends away from the bottom wall 212 on the side opposite to the top wall 211. The baffle 242 is adjacent to the wiring port 102 and is located on the side of the terminal slot away from the operating hole 101. Figure 4 In the middle, the baffle 242 extends in the terminal slot below the wiring port 102. When the wiring screw 22 is operated, as the wiring frame 21 moves up and down in the terminal slot, the baffle 242 can block the wiring port 102 to prevent the circuit breaker from entering from here and causing electric shock hazard.

[0047] In this embodiment, the mounting groove 214 extends along the direction from the bottom wall 212 to the top wall 211. The mounting groove 214 can be a strip groove or other irregular groove. The length of the mounting groove 214 is greater than half the length of the connecting wall 213. One end of the mounting groove 214 is provided with a switch that connects to the bottom wall 212. The other end of the mounting groove 214 is close to the top wall 211. An anti-detachment area 2141 is provided at the end of the mounting groove 214 close to the top wall 211. The inner diameter of the anti-detachment area 2141 is greater than the inner diameter of the mounting groove 214. Correspondingly, an anti-detachment part 245 is provided at the end of the mounting part 243 away from the bearing plate 241. The anti-detachment part 245 and the anti-detachment area 2141 are correspondingly matched.

[0048] In this embodiment, a positioning part 244 and a positioning groove are provided between the bottom wall 212 and the support plate 241, which are interlocked. Preferably, the positioning groove is opened on the bottom wall 212, and the positioning part 244 protrudes from the support plate 241. The number of positioning grooves can be one or more.

[0049] Combination Figure 5-7 A specific structure of a wiring frame 21 is provided. The wiring frame 21 includes a straight conductive plate, which is integrally bent to form a square frame structure. The top wall 211 of the wiring frame 21 is formed by stacking the two ends of the conductive plate. A screw hole 20 is provided in the middle of the top wall 211. A strip-shaped mounting groove 214 is provided in the connecting wall 213 connecting the top wall 211 and the bottom wall 212. One end of the mounting groove 214 communicates with the edge of the bottom wall 212, and the inner diameter of the other end of the mounting groove 214 is increased to form an anti-detachment area 2141. Figure 6 , 7 In the middle, the anti-detachment area 2141 is a rectangular groove, making the mounting groove 214 present a T-shaped groove as a whole. The bottom wall 212 has a positioning groove in the middle. The positioning groove is preferably a circular groove opened at the center of the bottom wall 212. The bottom wall 212 has multiple grooves 215 on the side facing the top wall 211. When the wiring frame 21 is located in the terminal groove, the wiring frame 21 and the wiring port 102 are opposite each other for connecting external wires. The connection direction of the external wire is set at an angle with the extension direction of the groove 215, which helps to increase the friction and prevent the external wire from detaching from the wiring frame 21.

[0050] Combination Figure 5 , 69 provides a specific structure for a wire clamping plate 23, which includes a first plate 231, a second plate 232, and a connecting plate 233. The first plate 231 and the second plate 232 are spaced apart and opposite each other. The connecting plate 233 connects the first plate 231 and the second plate 232 together. In this embodiment, the wire clamping plate 23 is an integrally formed U-shaped structure. The first plate 231 is used to be disposed on the side of the top wall 211 opposite to the bottom wall 212. That is, the first plate 231 is located outside the wiring frame 21. The middle part of the first plate 231 is provided with a screw hole 20 for the wiring screw 22 to pass through. The second plate 232 is disposed inside the wiring frame 21 and is spaced apart and opposite to the tail of the wiring screw 22. The connecting plate 233 corresponds to the space between the two connecting walls 213.

[0051] Combination Figure 5 , 6 Article 8 provides a specific structure for an insulating member 24, which includes a rectangular support plate 241. One edge of the support plate 241 is bent and extended to form a baffle 242, which is perpendicular to the surface of the support plate 241. A straight rod-shaped mounting portion 243 is provided at the middle of the two edges of the support plate 241 adjacent to the baffle 242. Each mounting portion 243 is perpendicular to the surface of the support plate 241 on the side opposite to the baffle 242. The end of each mounting portion 243 away from the support plate 241 is enlarged to form an anti-detachment portion 245. Figure 5 , 6 In section 8, the anti-detachment part 245 is a rectangular boss, making the mounting part 243 present a T-shape that mates with the mounting groove 214. A positioning part 244 is provided in the middle of the bearing plate 241, and the positioning part 244 protrudes and extends on the side opposite to the baffle 242. Figure 8 In the middle, the positioning part 244 is a circular boss.

[0052] In addition, the base 11 with the wiring port 102 is also provided with a slot 113. The slot 113 is located above the wiring port 102. The slot 113 corresponds to the space between the head of the wiring screw 22 and the top wall 211 of the wiring frame 21, so that the head of the wiring screw 22 and the wiring frame 21 form a second wiring structure. When the wiring frame 21 is equipped with a pressure plate 24, the slot 113 corresponds to the space between the head of the wiring screw 22 and the first plate 241 of the pressure plate 24. The sheet-like conductive element can pass through the slot 113. By operating the wiring screw 22, the wiring frame 21 moves upward, and the head of the wiring screw 22 and the first plate 241 press the sheet-like conductive element together, so that the circuit breaker has two wiring positions.

[0053] In this embodiment, contact mechanisms are connected to the L-pole main line and the N-pole main line respectively. The contact mechanisms control the connection and disconnection of the connected main lines. The contact mechanisms include a moving contact 51 and a stationary contact 52 that cooperate with each other. The moving contact 51 is driven by an operating mechanism 4 disposed in the housing 1. One end of the stationary contact 52 is connected to the adjacent terminal 2, and the other end is spaced apart from the baffle 242. Figure 2-4 In the middle, the moving contact 51 is rotatably mounted in the housing 1 via the contact support. The stationary contact 52 includes a stationary contact plate, which is approximately a straight plate. The stationary contact plate is approximately parallel to the connecting plate 233 of the pressure plate 23, and one end of the stationary contact plate is electrically connected to the connecting plate 233 of the pressure plate 23. The other end of the stationary contact plate extends on the side of the wiring frame 21 opposite to the wiring port 102, so that the other end of the stationary contact plate and the baffle 242 of the insulating component 24 are located at opposite ends of the wiring frame 21.

[0054] like Figure 1-4 As shown, in this embodiment, an operating mechanism 4 is only configured in the L pole. The operating mechanism 4 is connected to a handle mechanism 3. The operating mechanism 4 and the handle mechanism 3 are located in the same assembly cavity closer to the cover 12. That is, the operating mechanism 4 and the handle mechanism 3 are located higher inside the housing 1, so that the operating element of the handle mechanism 3 extends out of the housing 1 from the handle hole of the housing 1 for manual operation of the circuit breaker. The operating mechanism 4 and the handle mechanism 3 adopt existing technology. For example, the operating mechanism 4 includes a pair of fixed plates, and a handle mechanism is rotatably mounted between the pair of fixed plates. The handle mechanism 3 and the interlocking assembly include a pusher, a jump catch, a first latch, and a second latch. The first latch and the second latch are interlocked and rotatably mounted on the same side of the handle mechanism 3. The jump catch is rotatably mounted on the other side of the handle mechanism 3. The handle mechanism 3 cooperates with the jump catch via a connecting rod. The jump catch and the first latch form a latching engagement. The pusher and the second latch also form a latching engagement. One end of the pusher extends out of the fixed plate. By triggering the pusher, the latching engagement between the pusher and the second latch is released, thereby disengaging the latching engagement between the first latch and the jump catch. In this embodiment, the L-pole moving contact 51 is rotatably mounted between a pair of fixed plates via contact support. The connecting rod and the contact support engagement are also present. The N-pole moving contact 51 and the L-pole moving contact 51 are linked via contact support, thereby achieving synchronous operation.

[0055] In this embodiment, as Figure 1-4As shown, the circuit breaker is also equipped with a leakage current protection module. The leakage current protection module can adopt existing technology. The leakage current protection module includes a current transformer 61, a circuit board, a tripping device 62, and a leakage current testing mechanism. Preferably, the leakage current protection module is distributed in the housing 1, wherein the current transformer 61 is disposed through all the assembly cavities. The current transformer 61 and all the contact mechanisms are arranged side by side between each pair of terminals 2. That is, the space in the base 11 between each pair of terminals 2 is divided into two side by side mating grooves. One mating groove is used as the current transformer mating groove 111. The current transformer 61 mating groove is through the thickness direction of the base 11 to set the current transformer 61. The other mating groove is provided with a plurality of spaced strip grooves 112. Each strip groove 112 is equipped with an arc extinguishing grid plate, thereby forming an arc extinguishing chamber. In this embodiment, the stationary contact 52 is fixed between the terminal 2 and the arc extinguishing chamber, and the moving contact 51 is spaced apart from the stationary contact 52. The arc extinguishing chamber extinguishes the arc generated by the contact mechanism.

[0056] The circuit board can be configured in the assembly cavity of the L pole or N pole. The tripping device 62 is connected to the circuit board and is located in the same assembly cavity as the N pole main circuit. The tripping device 62 can be an electromagnetic tripping device. The electromagnetic tripping device includes a housing. At least a coil assembly, an armature, and a magnetic conductor for forming a magnetic circuit between the coil assembly and the armature are assembled in the housing. The coil assembly is connected to the circuit board. The controller of the circuit board outputs a control signal to energize or de-energize the coil assembly. The coil assembly drives the armature to swing in the housing. Preferably, the armature is also connected to a reset member, which drives the armature to rotate and reset. A push rod is slidably assembled on one side of the housing 21. The end of the push rod located inside the housing cooperates with the armature, and the end of the push rod located outside the housing is connected to the push member in the tripping interlock assembly.

[0057] like Figure 1-4 As shown, the leakage current testing mechanism includes a test button 63 and a test circuit. The test button 63 is slidably disposed on the housing 1. In this embodiment, the button hole and the assembly cavity for assembling the L pole correspond to the assembly cavity of the L pole. The test button 63 and the handle mechanism 3 are located at opposite ends of the housing 1. The test circuit draws power from the L pole main line and the N pole main line respectively. The power of the test circuit is turned on or off by the test button 63. The test circuit includes at least a wire and a test resistor 64. In the figure, the test resistor 64 and the wire connected to the test resistor 64 are located in the assembly cavity of the L pole.

[0058] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0059] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A terminal comprising a terminal frame (21) and an insulating member (24), a top wall (211) of the terminal frame (21) being provided with a screw hole (20), a terminal screw (22) being fitted in the screw hole (20), and the head of the terminal screw (22) being capable of driving the terminal frame (21) to slide in the housing (1) towards or away from the head of the terminal screw (22) by screwing the head of the terminal screw (22), characterized in that: The wiring frame (21) comprises a top wall (211), a bottom wall (212) arranged opposite to the top wall (211), and a connecting wall (213) connected between the top wall (211) and the bottom wall (212), the connecting wall (213) is provided with a mounting groove (214), the mounting groove (214) is parallel to the central axis of the wiring screw (22), the insulating piece (24) comprises a bearing plate (241), the bearing plate (241) is arranged on the side of the bottom wall (212) away from the top wall (211), the bearing plate (241) is provided with a mounting portion (243), the mounting portion (243) extends towards the top wall (211) and is embedded in the mounting groove (214), at least one side edge of the bearing plate (241) is provided with a baffle (242), the baffle (242) extends away from the bottom wall (212) on the side away from the top wall (211).

2. The terminal of claim 1, wherein: One end of the mounting groove (214) is provided with an opening communicating with the bottom wall (212), the other end of the mounting groove (214) is close to the top wall (211), and the length of the mounting groove (214) is greater than one half of the length of the connecting wall (213).

3. The terminal of claim 1, wherein: The mounting groove (214) comprises an anti-falling area (2141), the inner diameter of the anti-falling area (2141) is greater than the inner diameter of the mounting groove (214), and the mounting portion (243) is provided with an anti-falling portion (245) matched with the anti-falling area (2141).

4. The terminal of claim 3 wherein: The anti-falling area (2141) is located at one end of the mounting groove (214) close to the top wall (211), and the anti-falling portion (245) is located at one end of the mounting portion (243) away from the bearing plate (241).

5. The terminal of claim 1, wherein: The positioning structure is arranged between the bottom wall (212) and the bearing plate (241), and comprises a positioning portion (244) and a positioning groove which are inserted into each other, the positioning portion (244) is arranged on the bottom wall (212) and / or the bearing plate (241), and the positioning groove is arranged on the bearing plate (241) and / or the bottom wall (212).

6. The wiring terminal of claim 1, wherein: The wiring frame (21) comprises a top wall (211), a bottom wall (212) arranged opposite to the top wall (211), and a connecting wall (213) connected between the top wall (211) and the bottom wall (212), the connecting wall (213) is provided with a mounting groove (214), the mounting groove (214) is parallel to the central axis of the wiring screw (22), the insulating piece (24) comprises a bearing plate (241), the bearing plate (241) is arranged on the side of the bottom wall (212) away from the top wall (211), the bearing plate (241) is provided with a mounting portion (243), the mounting portion (243) extends towards the top wall (211) and is embedded in the mounting groove (214), at least one side edge of the bearing plate (241) is provided with a baffle (242), the baffle (242) extends away from the bottom wall (212) on the side away from the top wall (211).

7. The wiring terminal according to claim 6, characterized by: The bearing plate (241) is provided with one baffle (242), and the baffles (242) and the connecting plate (233) correspond to opposite sides of the wiring frame (21), respectively.

8. The wiring terminal of claim 1, wherein: The wiring frame (21) is formed by bending a conductive plate into a square structure, the top wall (211) is formed by laminating two ends of the conductive plate, a threaded hole (20) is formed in the middle of the top wall (211), the connecting wall (213) connected between the top wall (211) and the bottom wall (212) is provided with a strip-shaped mounting groove (214), one end of the mounting groove (214) is communicated with the edge of the bottom wall (212), the other end of the mounting groove (214) is increased in diameter to form a anti-drop area (2141), a positioning groove is formed in the middle of the bottom wall (212), and a plurality of grooves (215) are arranged on the side of the bottom wall (212) facing the top wall (211).

9. The wiring terminal of claim 1, wherein: The insulating part (24) comprises a rectangular bearing plate (241), one side edge of the bearing plate (241) is bent to extend to form a baffle (242), the baffle (242) is perpendicular to the plate surface of the bearing plate (241), and the middle portions of the two edges of the bearing plate (241) adjacent to the baffle (242) are provided with straight rod-shaped mounting portions (243), each mounting portion (243) is perpendicular to the plate surface of the bearing plate (241) on the side away from the baffle (242), and the end of each mounting portion (243) away from the bearing plate (241) is increased to form an anti-drop portion (245), and a positioning portion (244) is arranged in the middle of the bearing plate (241) and protrudes away from the baffle (242).

10. A circuit breaker comprising a housing (1) in which at least one pair of spaced-apart terminal slots are provided, each of the terminal slots being fitted with an operating hole (101) and a terminal port (102), characterized in that: Each terminal slot is provided with the wiring terminal (2) as claimed in any one of claims 1-9, the wiring frame (21) is opposite to the wiring port (102), the head of the wiring screw (22) is opposite to the operation hole (101), the baffle (242) is adjacent to the wiring port (102) and located on the side of the terminal slot away from the operation hole (101), the wiring screw (22) is rotatably arranged in the terminal slot, and the wiring frame (21) can move up and down in the terminal slot.

11. The circuit breaker of claim 10, wherein: Each pair of wiring terminals (2) is connected with a phase main line, a contact mechanism is connected in each phase main line, the contact mechanism comprises a movable contact (51) and a static contact (52) matched with each other, one end of the static contact (52) is connected with the adjacent wiring terminal (2), and the other end is spaced apart from the baffle (242).

12. The circuit breaker of claim 11, wherein: The housing (1) is also provided with a leakage protection module, the leakage protection module is dispersedly arranged in the housing (1), and the leakage protection module comprises a mutual inductor (61).

13. The circuit breaker of claim 12, wherein: The internal space of the housing (1) is divided into at least two parallel assembly cavities, each assembly cavity is provided with a phase main line, and the mutual inductor (61) is arranged in all assembly cavities.

14. The circuit breaker of claim 13, wherein: All the main lines comprise at least one phase L pole main line and at least one phase N pole main line, the leakage protection module further comprises a tripping device (62), and the tripping device (62) is arranged in the same assembly cavity as the N pole main line.

15. The circuit breaker of claim 10, wherein: The shell (1) is further provided with a slot (113) above the wiring port (102), the slot (113) corresponding to the space between the head of the wiring screw (22) and the top wall (211) of the wiring frame (21), so that the second wiring structure is formed between the head of the wiring screw (22) and the wiring frame (21).

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