circuit breaker

Abstract

The circuit breaker comprises a shell provided with a locking hole, an operating part is assembled to the operating end of the shell, the operating part is pressed or pulled along the connecting direction of the operating end and the plug-in end to switch the operating part between the closing position, the opening position or the pulling unlocking position in sequence, a protection mechanism is arranged in the shell, the protection mechanism comprises a locking part and a locking elastic part, the locking part is located between the operating part and the locking hole, the locking part is provided with a driving force by the locking elastic part to make the locking part of the locking part extend out of the locking hole, an abutting part is arranged between the operating part and the locking part, and the operating part is pressed or pulled to switch the matching position of the abutting part and the locking part. The circuit breaker cannot be closed before being assembled in place, and can only be assembled in the open state, the operating part is pressed or pulled after being assembled in place, the matching position of the abutting part and the operating part is switched, the circuit breaker cannot be pulled out in the closed state, and the assembly and use safety are ensured.

Description

Technical Field

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

[0002] A circuit breaker is a switching device used to disconnect and connect a load circuit, and to cut off a faulty circuit to prevent the accident from escalating, thereby ensuring the safe operation of the load circuit. A 1U circuit breaker typically includes a positive circuit and a negative circuit, wherein at least one circuit has a break point, and the circuit without a break point always remains in a conducting state. Existing circuit breakers lack protective mechanisms to prevent them from being pulled out of the cabinet when closed, or although they have corresponding protective mechanisms, the cooperation structure between the protective mechanism and the button assembly is complex. 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 circuit breaker.

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

[0005] This utility model provides a circuit breaker, including a housing. The housing has an operating end and a plug-in end at opposite ends. A locking hole is provided on the side wall of the housing connecting the operating end and the plug-in end, and the locking hole is close to the operating end. The operating end is equipped with a button assembly, which includes an operating member. Pressing or pulling the operating member along the line connecting the operating end and the plug-in end sequentially switches the operating member between a closed position, an open position, or a pull-out unlocked position.

[0006] The housing also includes a protective mechanism comprising a locking element and a locking elastic element. The locking element is located between the operating element and the locking hole, and the locking elastic element provides a driving force to the locking element, causing the locking portion of the locking element to extend out of the locking hole. An abutment portion is also provided between the operating element and the locking element; pressing or pulling the operating element switches the engagement position between the abutment portion and the locking element.

[0007] When the operating member is in the closed position, the locking member is pressed against the abutment part, preventing the locking part located outside the locking hole from being pushed into the housing.

[0008] When the operating element is in the open position, at least a portion of the locking part can be pushed into the housing.

[0009] When the operating element is in the pull-out unlock position, the locking part is driven by the operating element to retract into the housing.

[0010] Preferably, the abutting portion is a protrusion provided on the side wall of the operating member and / or the abutting portion is a boss on the side of the locking member opposite to the locking portion.

[0011] Preferably, the abutment portion is located on the side of the locking member opposite to the locking portion, and before the circuit breaker is assembled in place, the abutment portion stops the closing action of the operating member.

[0012] Preferably, the locking member is driven by the locking elastic member to perform linear telescopic movement, and the side of the locking member facing the locking hole is also provided with a force-receiving part. The protective mechanism also includes a pressing member, which moves linearly with the operating member, and the pressing member is provided with a pressing part.

[0013] When the operating member is in the closed or open position, the pressing part separates from the force-receiving part, causing the locking part to be located outside the locking hole.

[0014] When the operating member is in the pull-unlock position, the pressing part presses the force-receiving part, causing the locking member to be driven to move closer to the operating member.

[0015] Preferably, the pressing member is located between the locking member and the locking hole, and the pressing member is also provided with a clearance space. When the operating member is in the closed or open position, the force-bearing part is located within the clearance space. When the operating member is in the pull-unlock position, the abutting part drives the locking member, so that the force-bearing part is located outside the clearance space and cooperates with the pressing member.

[0016] Preferably, the locking member has two force-receiving parts, which are symmetrically distributed on both sides of the locking part, and the pressing member has two pressing parts, with a clearance groove between the two pressing parts for avoiding the locking part.

[0017] Preferably, the locking elastic element includes at least one twisted portion, which is rotatably mounted between the operating member and the locking hole. The first elastic arm of the twisted portion elastically abuts against the inner sidewall of the housing, and the second elastic arm of the twisted portion abuts against the locking member to keep the locking portion protruding out of the locking hole.

[0018] Preferably, the operating member is provided with a driving boss, and the pressing member is provided with a driven boss. When the operating member is pulled to the pull-unlock position, the driving boss and the driven boss cooperate to drive the pressing member to move.

[0019] Preferably, the protective mechanism further includes a pressing reset member, which is located between the pressing member and the inner sidewall of the housing, and provides a reset force to the pressing member.

[0020] Preferably, the locking member includes a plate-shaped body, with rectangular bosses at both ends. The locking portion protrudes from the plate-shaped body between two rectangular bosses, forming a force-bearing portion with an adjacent rectangular boss. Each rectangular boss has an elastic drive groove on its side facing away from the locking portion, and the plate-shaped body has a boss serving as an abutment on its side facing away from the locking portion.

[0021] The locking elastic element includes two twisted portions. The first elastic arms of the two twisted portions extend towards each other and are connected together for elastic abutment against the inner wall of the housing. The second elastic arm of each twisted portion passes through an elastic drive groove, and the end of each second elastic arm is bent to form an anti-disengagement portion.

[0022] The pressing component includes a plate-shaped body, with a driven boss and a pressing part protruding from both ends of the plate-shaped body, respectively. The driven boss cooperates with a driving boss protruding from the operating component. A circular shaft is provided on both sides of the driven boss, and each of the twisted parts is rotatably assembled on the circular shaft. A positioning shaft is provided on the side of the driven boss facing away from the pressing part. A pressing reset component is provided between the positioning shaft and the inner sidewall of the housing. A recessed area is provided between the pressing part and the driven boss as a clearance space. A clearance groove is opened at one end of the plate-shaped body with the pressing part. The clearance groove has an opening at the end away from the driven boss, which divides the pressing part into two parts. The locking part moves within the clearance groove.

[0023] Preferably, the abutment portion is fixed to the side wall of the operating member, the locking member is rotatably assembled between the operating member and the locking hole, and the side of the locking member facing away from the locking portion is provided with a force-bearing portion and a clearance space, and the force-bearing portion is located at the end away from the locking portion.

[0024] When the operating member is in the closed position, the abutting part is pressed against the side of the locking member opposite to the locking part, preventing the locking part from being pushed into the housing.

[0025] When the locking member is in the open position, the abutting part is within the clearance space and can slide towards the force-receiving part, allowing the locking part to be pushed into the housing.

[0026] When the locking member is in the pull-out unlock position, the abutting part cooperates with the force-receiving part, causing the locking member to rotate in the direction of retracting into the housing.

[0027] Preferably, the sidewall of the operating member protrudes to form a boss serving as the abutment portion, the abutment portion including a first abutment surface and a second abutment surface.

[0028] When the operating member is in the closed position, the first abutting surface abuts against the side of the locking member opposite to the locking part, preventing the locking part from being pushed into the housing.

[0029] When the operating component is in the open position, the first abutment surface slides into the clearance space, allowing the locking part to be pushed into the housing.

[0030] When the operating member is in the pull-unlock position, the second abutment surface cooperates with the force-receiving part to drive the locking member to rotate.

[0031] Preferably, the side wall of the operating member is provided with a pair of fixed bosses, and a protrusion is assembled between the pair of fixed bosses, with a portion of one side of the protrusion extending out to form an abutment portion.

[0032] Preferably, the locking member includes a rod-shaped body, one end of which is provided with a connecting shaft, and the other end of which protrudes to form a rectangular boss serving as a locking part. The rod-shaped body has an arc-shaped concave surface forming a clearance space on the side facing away from the locking part. The rod-shaped body has a protruding force-bearing part located on the side facing away from the locking part, and the force-bearing part is close to the connecting shaft and connects with the clearance space. The rod-shaped body also has an elastic abutment part.

[0033] Preferably, the locking elastic element includes a twisted portion, which is sleeved on the connecting shaft. One elastic arm of the twisted portion elastically abuts against the inner wall of the housing, and the other elastic arm of the twisted portion elastically abuts against the elastic abutting portion.

[0034] The circuit breaker of this utility model, by setting a protective mechanism, prevents the circuit breaker from being closed before it is fully assembled, and can only be assembled in the open state. After it is fully assembled, pressing or pulling the operating part changes the cooperation position between the abutment part and the operating part, so that the circuit breaker cannot be pulled out in the closed state, thus ensuring the safety of the circuit breaker assembly and use.

[0035] In addition, the locking element can be driven by the locking elastic element to move linearly, or it can be driven by the locking elastic element to rotate around an axis, which has a wide range of applications.

[0036] In particular, the locking element and the pressing element work together, and the pressing element moves in a straight line with the operating element, requiring little space and achieving a high degree of fit.

[0037] In addition, by setting a pressing reset component, the pressing component moves in a straight line under the joint cooperation of the operating component and the pressing reset component, thereby improving the cooperation stability of the pressing component. Attached Figure Description

[0038] Figure 1This is a schematic diagram of the structure of the circuit breaker of this utility model;

[0039] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker of this utility model;

[0040] Figure 3 This is a schematic diagram of the circuit breaker of this utility model when it is closed;

[0041] Figure 4 This is a schematic diagram of the circuit breaker of this utility model when it is tripped;

[0042] Figure 5 This is an exploded view of the operating terminal and wiring terminals of this utility model;

[0043] Figure 6 This is a schematic diagram of the structure of the terminal block of this utility model;

[0044] Figure 7 This is a schematic diagram of the connection of the two-pole circuit in this utility model;

[0045] Figure 8 This is a schematic diagram of the structure of this utility model after removing one of the first sub-shells;

[0046] Figure 9 This is a structural schematic diagram of the adjustment port, sliding cover, and connecting area in this utility model;

[0047] Figure 10 This is a schematic diagram of the structure after the sliding cover and the adjustment port are separated in this utility model. Figure 1 ;

[0048] Figure 11 This is a schematic diagram of the structure of the outer shell of this utility model, which includes a sliding part, a locking hole, and a strip-shaped protrusion;

[0049] Figure 12 This is an exploded view of the outer shell and inner shell in this utility model;

[0050] Figure 13 This is a schematic diagram of the structure of a second sub-shell in this utility model;

[0051] Figure 14 This is an exploded view of the button assembly in this utility model;

[0052] Figure 15 This is a schematic diagram showing the cooperation between the operating component and the partition in this utility model;

[0053] Figure 16 This is a schematic diagram of the structure of the first embodiment of the protective mechanism in this utility model;

[0054] Figure 17 This is an exploded structural diagram of the first embodiment of the protective mechanism in this utility model;

[0055] Figure 18 yes Figure 16 A structural diagram of the central protective mechanism (excluding operating components);

[0056] Figure 19 yes Figure 18 Decomposition structure diagram Figure 1 ;

[0057] Figure 20 yes Figure 18 Decomposition structure diagram Figure 2 ;

[0058] Figure 21 This is a schematic diagram of the structure of the first embodiment of the protective mechanism in the closed position of this utility model;

[0059] Figure 22 This is a cross-sectional view of the first embodiment of the protective mechanism in the present invention at the closed position;

[0060] Figure 23 This is a schematic diagram of the structure of the first embodiment of the protective mechanism in the pull-out unlocking position of this utility model;

[0061] Figure 24 This is a cross-sectional view of the first embodiment of the protective mechanism in this utility model at the pull-out unlocking position;

[0062] Figure 25 This is a schematic diagram of the structure of the second embodiment of the protective mechanism in this utility model. Figure 1 ;

[0063] Figure 26 yes Figure 25 A schematic diagram of the decomposed structure;

[0064] Figure 27 yes Figure 25 Schematic diagram of the locking component;

[0065] Figure 28 This is a schematic diagram of the second embodiment of the protective mechanism. Figure 2 ;

[0066] Figure 29 yes Figure 28 A schematic diagram of the decomposed structure;

[0067] Figure 30 This is a structural schematic diagram of the third embodiment of the protective mechanism of this utility model;

[0068] Figure 31 yes Figure 30 A schematic diagram of the exploded structure of the central protective mechanism;

[0069] Figure 32 yes Figure 30 Schematic diagram of the middle pressing component;

[0070] Figure 33 yes Figure 30 Schematic diagram of the locking component;

[0071] Figure 34 yes Figure 30 Cross-sectional diagram during closing Figure 1 ;

[0072] Figure 35 yes Figure 30 Cross-sectional diagram during closing Figure 2 ;

[0073] Figure 36 yes Figure 30 Cross-sectional diagram during circuit breaker tripping Figure 1 ;

[0074] Figure 37 yes Figure 30 Cross-sectional diagram during circuit breaker tripping Figure 2 ;

[0075] Figure 38 This is a schematic diagram of the structure of the first conductive plate and the busbar clamp in this utility model;

[0076] Figure 39 This is a schematic diagram of the structure of the second conductive plate in this utility model;

[0077] Figure 40 This is a schematic diagram of the structure of the current splitter and busbar clamp of this utility model;

[0078] Figure 41 This is a schematic diagram of the structure of the distributor and the stationary contact plate in this utility model. Figure 1 ;

[0079] Figure 42 This is a schematic diagram of the structure of the distributor and the stationary contact plate in this utility model. Figure 2 ;

[0080] Figure 43 This is a schematic diagram of the structure of the reclosing module drive operating mechanism when it automatically closes the circuit in this utility model;

[0081] Figure 44 This is a schematic diagram of the reclosing module drive operating mechanism during the opening phase of this utility model. Figure 1 ;

[0082] Figure 45 This is a schematic diagram of the reclosing module drive operating mechanism during the opening phase of this utility model. Figure 2 ;

[0083] Figure 46This is a schematic diagram of the reclosing module drive operating mechanism during the opening phase of this utility model. Figure 3 ;

[0084] Figure 47 This is a schematic diagram of the reclosing module drive operating mechanism during the opening phase of this utility model. Figure 4 ;

[0085] Figure 48 This is a schematic diagram showing the engagement of the trip gear triggering mechanism in this utility model when it is about to disengage.

[0086] Figure 49 This is a schematic diagram showing the cooperation between the bimetallic component, the electromagnetic component, and the operating mechanism in this utility model;

[0087] Figure 50 This is a schematic diagram showing the engagement of the double-metal component triggering mechanism when it is about to disengage in this utility model;

[0088] Figure 51 This is a schematic diagram showing the engagement of the electromagnetic component triggering mechanism in this utility model when it is about to trip.

[0089] Figure 52 This is a structural schematic diagram of the transmission component, rotating shaft assembly, and moving contact in this utility model;

[0090] Figure 53 This is a schematic diagram of the transmission component in this utility model;

[0091] Figure 54 This is a structural schematic diagram of the latch, the driven component, and the latch spring in this utility model;

[0092] Figure 55 This is a schematic diagram of the traction rod in this utility model;

[0093] Figure 56 This is a schematic diagram of the structure of the first connecting rod in this utility model. Figure 1 ;

[0094] Figure 57 This is a schematic diagram of the structure of the first connecting rod in this utility model. Figure 2 ;

[0095] Figure 58 This is a schematic diagram of the structure of the motor and gear set in this utility model;

[0096] Figure 59 This is a schematic diagram of the structure of the first circuit board, the first micro switch, and the second micro switch in this utility model;

[0097] Figure 60 This is a schematic diagram of the structure of the second circuit board, conductive clip, conductive shaft and connector in this utility model;

[0098] Figure 61 This is a schematic diagram of the spring sheet in this utility model;

[0099] Figure 62 This is an exploded structural diagram of the dual-metal component in this utility model;

[0100] Figure 63 This is an exploded structural diagram of the first embodiment of the electromagnetic component in this utility model;

[0101] Figure 64 This is a schematic diagram of the structure of the second embodiment of the electromagnetic component in this utility model;

[0102] Figure 65 yes Figure 64 A schematic diagram of the decomposed structure;

[0103] Figure 66 This is a schematic diagram of the structure of the arc-extinguishing chamber and the moving arc-starting angle in this utility model;

[0104] Figure label:

[0105] 11-Operating terminal, 12-Plug-in terminal, 13-Wiring port, 14-Wiring socket, 15-Signal socket, 16-Block, 160-Rib.

[0106] 21-Outer shell, 210-First sub-shell, 211-Locking hole, 212-Adjustment port, 213-Sliding cover, 214-Indicator switching part, 215-Sliding part, 216-Guide boss, 22-Inner shell, 220-Second sub-shell, 221-Communication area, 222-Mounting chamber, 223-Support column, 2231-Airflow channel, 224-Support curved surface, 225-Assembly plate.

[0107] 31-Button assembly, 310-Abutting part, 311-Operating element, 3110-Assembly cavity, 3111-Indicator window, 3112-Drive boss, 3113-Limit boss, 312-Indicator element, 3121-Rotation switching part, 313-Light guide column, 32-Protective mechanism, 321-Locking element, 3211-Locking part, 3212-Force-receiving part, 3213-Slide groove, 3214-Leaving space, 3215-Elastic drive groove, 322-Locking elastic element, 323-Pressing element, 3231-Pressing part, 3232-Allowing space, 3233-Allowing groove, 3234-Round shaft, 3235-Positioning shaft, 3236-Driven boss, 324-Press reset element

[0108] 41-Terminal block, 42-Busbar clamp, 43-First conductive plate, 44-Second conductive plate, 45-Shunt unit, 451-Shunt wiring section, 46-Conductive clamp, 47-Connector

[0109] 5-Operating mechanism, 51-Transmission component, 511-Closing driven part, 512-Extension part, 513-Connecting hole, 514-Push part, 52-Rotating shaft, 53-Lock, 54-Trigger, 55-Driven component, 551-First unlocking part, 552-Second unlocking part, 56-Traction rod, 560-Rotating connection part, 561-Closing driven part, 562-Closing force application part, 563-Connecting plate, 57-Lock spring, 581-First connecting rod, 5811-Torsion part, 5812-Strip hole, 582-Second connecting rod

[0110] 6-Reclosing module; 61-Motor; 62-Drive gear; 621-Closing drive unit; 622-Stop unit; 63-Opening gear; 631-Opening drive unit; 641-First circuit board; 642-Second circuit board; 643-First microswitch; 644-Second microswitch; 651-First transmission gear; 652-Second transmission gear; 66-Spring plate.

[0111] 71-Bimetallic component, 711-Bimetallic strip, 712-Heating element, 713-Adjusting screw, 714-Limiting component, 72-Electromagnetic component, 720-Conductive plate, 721-Armature, 7211-Trigger arm, 722-Magnetic yoke, 723-Magnetic amplifying component, 724-Armature reset component, 725-Support shaft, 726-Bracket, 7261-Limiting part, 727-Armature guide rod

[0112] 8-Contact mechanism, 81-Moving contact, 82-Stationary contact, 821-Stationary contact plate.

[0113] 9-Arc extinguishing system, 91-Arc extinguishing chamber, 921-Dynamic arc ignition angle, 922-Static arc ignition angle, 923-Conductive shaft, 924-Exhaust space, 925-Arc running channel. Detailed Implementation

[0114] The specific embodiments of the circuit breaker of this utility model are further described below with reference to the accompanying drawings. The circuit breaker of this utility model is not limited to the descriptions in the following embodiments.

[0115] like Figure 1-4 As shown in Figure 7, the circuit breaker, preferably a plug-in type, includes a housing 21 and a two-pole circuit disposed within the housing 21. The two-pole circuit is a positive circuit and a negative circuit, wherein at least one pole circuit includes a break point, that is, a break point composed of a moving contact and a stationary contact that can be closed or opened. The connection and disconnection of the pole circuit are controlled by controlling the opening and closing of the break point. Alternatively, both the positive and negative pole circuits may have break points. In this embodiment, the negative pole circuit has a break point, while the positive pole circuit does not have a break point, so that the positive pole circuit always remains in a conducting state.

[0116] Specifically, the circuit breaker includes a housing 21, preferably, such as Figure 1 , 9 As shown in Figure 11, the outer casing 21 includes a first sub-casing 210 that is assembled with each other for easy assembly. Furthermore, the outer side wall of the outer casing 21 may be provided with a protruding guide boss 216 to facilitate insertion and removal from the cabinet, such as... Figure 1-4 As shown in Figure 9, the two opposite ends of the housing 21 are the operation end 11 and the plug-in end 12, respectively. The operation end 11 is provided with a button hole and at least two wiring ports 13. Two adjacent wiring ports 13 are arranged side by side. A button assembly 31 is slidably installed in the button hole. The button assembly 31 can move linearly along the line connecting the operation end 11 to the plug-in end 12, and is used to switch between the closed position, the open position, or the pull-out unlock position in sequence. Specifically, when the button assembly 31 is pressed to the closed position, the circuit breaker is closed. When the button assembly 31 is pulled to the open position, the circuit breaker is open. The circuit breaker in the open state can be installed in the cabinet. When the circuit breaker is in the open state, the button assembly 31 is pulled further. When the button assembly 31 is in the pull-out unlock position, the lock between the circuit breaker and the cabinet can be released, so that the circuit breaker can be pulled out of the cabinet.

[0117] like Figure 5-9 As shown, each connection port 13 is equipped with a terminal block 41, and the plug-in end 12 has at least two connection ports 14 arranged side by side. Each connection port 14 is equipped with a corresponding bus clamp 342, and each bus clamp 342 corresponds to at least one terminal block 41. In this embodiment, each bus clamp 342 corresponds to two terminal blocks 41. Along the line connecting the operating end 11 to the plug-in end 12, the circuit breaker can be installed in the cabinet. After the circuit breaker is installed in place, the bus clamp 342 is plugged into the conductive parts in the cabinet. Typically, the side wall of the cabinet is provided with a limiting hole, and the side wall of the outer shell 21 is provided with a locking hole 211 (see...). Figure 10 Preferably, the locking hole 211 is located on the side wall of the housing 21 connecting the operating end 11 and the plug-in end 12. According to the direction of the circuit breaker being inserted into the cabinet, the locking hole 211 is located on the lower wall of the housing 21. The locking hole 211 is located closer to the operating end 11. When the locking hole 211 corresponds to the limit hole, the circuit breaker is assembled in place.

[0118] Along the direction from the operating end 11 to the insertion / removal end 12, such as Figure 2-4As shown, the housing 21 also includes a reclosing module 6, an operating mechanism 5, a contact mechanism, and an arc-extinguishing system 9. The operating mechanism 5 drives the contact mechanism 81 to complete the opening and closing actions, thereby connecting or disconnecting the circuit. The arc-extinguishing system 9 works in conjunction with the contact mechanism to extinguish the arc generated by the disconnection. The button assembly 31 is linked to the operating mechanism 5, enabling manual closing or opening of the operating mechanism 5. The reclosing module 6 is driven by the operating mechanism 5, enabling automatic opening or closing of the operating mechanism 5. Furthermore, the housing 21 also includes a bimetallic component 71 and / or an electromagnetic component 72. The bimetallic component 71 triggers the operating mechanism 5 to trip when an overload occurs in the circuit, providing overload protection. The electromagnetic component 72 triggers the operating mechanism 5 to trip when a short-circuit fault occurs in the circuit, providing short-circuit protection.

[0119] For ease of description, such as Figure 1 As shown, the circuit breaker's length direction is defined by the line connecting the operating end 11 to the plug-in end 12. The button assembly 31 is pressed or pulled along the circuit breaker's length direction, and the entire circuit breaker is plugged and unplugged into the cabinet along its length direction. The two directions perpendicular to the circuit breaker's length direction are the width direction and the thickness direction of the housing 21, respectively. Two adjacent wiring ports 13 are arranged side by side in the width direction of the housing 21, and two wiring ports 14 are arranged side by side in the thickness direction of the housing 21. In the figure, there are four wiring ports 13. Of course, the number of wiring ports 13 is not limited to four and can be adjusted according to actual needs.

[0120] Preferred, such as Figure 8 , 9 As shown in Figure 12, an inner shell 22 is disposed within the outer shell 21 between the wiring port 13 and the wiring socket 14. Preferably, the inner shell 22 includes two second sub-shells 220 that are assembled together. The two second sub-shells 220 are preferably connected by snap-fit ​​for easy disassembly and assembly. The reclosing module 6, operating mechanism 5, contact mechanism, arc extinguishing system 9, bimetallic component 71, and electromagnetic component 72 are all assembled in the inner shell 22, which facilitates the formation of a modular structure and simplifies the assembly process. At the same time, the inner shell 22 can provide protection for core components such as the operating mechanism 5, contact mechanism, and arc extinguishing system 9, so that the core components can be assembled into a modular structure and installed in the outer shell 21, which simplifies the assembly. The button assembly 31 can pass through the inner shell 22 and be linked to the operating mechanism 5. The wiring terminal 41 and the bus clamp 342 are assembled in the outer shell 21 outside the inner shell 22. Figure 5 , 6 As shown, the terminal block 41 and bus clamp 342 can adopt existing technology. The wiring ports 13 corresponding to the terminal block 41 can be arranged side by side along the same straight line, or adjacent wiring ports 13 can be staggered, thereby making full use of space; as Figure 7As shown, at least one terminal 41 is connected to a bus clamp 342 via a first conductive plate 43 to form a through circuit. At least another terminal 41 is electrically connected to another bus clamp 342 via a second conductive plate 44, a contact mechanism, and a shunt 45. The second conductive plate 44 is connected to the terminal 41, and the shunt 45 is connected to the bus clamp 342. The first conductive plate 43 and the second conductive plate 44 are respectively arranged on opposite sides outside the inner shell 22. The first conductive plate 43 and the second conductive plate 44 are spaced apart from each other in the width direction of the circuit breaker.

[0121] Preferred, such as Figure 9 As shown, the inner shell 22 forms a support surface 224 at the position corresponding to the wiring socket 14. There are two support surfaces 224, each corresponding to one of the two wiring sockets 14. Each support surface 224 protrudes on the side facing the busbar clamp 42, which facilitates its fit with the busbar clamp 42. Furthermore, a support frame (not shown) is provided between the two support surfaces 224. The support frame is used to provide support for the signal socket 15. The support frame includes a support body, which is a U-shaped body. The support body includes two spaced-apart support walls. The opening width between the two support walls is equal to the opening width of the signal socket 15. Multiple support plates are provided on the side of the support wall facing away from the signal socket 15. The support plates cooperate with the side of the support surface 224 facing away from the busbar clamp 42. Preferably, the edge of the support plate is an arc-shaped edge that matches the support surface 224, thereby enhancing the stability of the fit between the support surface 224 and the support plate.

[0122] Among them, such as Figures 43-47 As shown in Figure 52, the operating mechanism 5 includes a transmission component 51 and a rotating shaft assembly that are linked together. The transmission component 51 and the rotating shaft assembly are rotatably mounted in the inner shell 22, with the transmission component 51 being closer to the button assembly 31. The rotating shaft assembly includes a rotating shaft component 52, which is linked to the transmission component 51 via a second connecting rod 582. A latch structure is rotatably mounted on the rotating shaft component 52. The button assembly 31 is linked to the transmission component 51 via a first connecting rod 581. Pressing or pulling the button assembly 31 directly drives the transmission component 51 to perform manual closing or manual opening rotation. The contact mechanism includes a moving contact 81 and a stationary contact 82 that cooperate with each other. The moving contact 81 is connected to the rotating shaft component 52, and the stationary contact 82 and the moving contact 81 are spaced apart and opposite to each other in the middle of the inner shell 22. The arc extinguishing system 9 is mounted at the end away from the operating mechanism 5 and is used to extinguish the arc generated by the contact mechanism breaking.

[0123] Furthermore, such as Figure 2-4As shown, the bimetallic assembly 71 and the electromagnetic assembly 72 are arranged along the length of the circuit breaker on the side of the inner shell 22. In the width direction of the circuit breaker, the bimetallic assembly 71 is arranged side-by-side with the operating mechanism 5, specifically side-by-side with the transmission component 51. The electromagnetic assembly 72 is arranged side-by-side with the rotating shaft assembly. The operating mechanism 5 also includes a traction rod 56, which is rotatably mounted between the bimetallic assembly 71 and the electromagnetic assembly 72, and is located on one side of the rotating shaft assembly. Figure 50 As shown, when an overload fault occurs, the bimetallic component 71 drives the traction rod 56 to rotate, which triggers the latch structure in the shaft assembly to unlock. The shaft assembly then drives the moving contact 81 to separate from the stationary contact 82. Figure 51 As shown, when a short circuit fault occurs, the electromagnetic component 72 directly triggers the latch structure in the rotating shaft assembly to unlock, and the rotating shaft assembly drives the moving contact 81 to separate from the stationary contact 82.

[0124] like Figure 2-4 As shown, along the length of the circuit breaker, the reclosing module 6 is positioned between the push-button assembly 31 and the operating mechanism 5; along the width of the circuit breaker, the reclosing module 6 and the bimetallic assembly 71 are arranged side-by-side, as shown. Figure 2-4 As shown in Figures 43-47 and 58-60, the reclosing module 6 includes a control component and a motor 61. The control component outputs a control signal to drive the motor 61 to rotate. The control component includes at least one circuit board, which is equipped with a controller for outputting control signals. Preferably, the control component includes a first circuit board 641 and a second circuit board 642 that are plugged into each other. The first circuit board 641 is disposed in the inner shell 22, and the second circuit board 642 is disposed outside the inner shell 22 along the length of the circuit breaker. The second circuit board 642 is provided with a conductive element. The second circuit board 642 is connected to the first conductive plate 43 and the second conductive plate 44 through the conductive element to obtain power. Preferably, the conductive element is a conductive clip 46 (see Figure 443). Figure 60 The second circuit board 642 is provided with a connector 47 near the plug-in end 12. The plug-in end 12 is provided with a signal socket 15 corresponding to the connector 47. Along the length of the circuit breaker, a gear assembly is connected between the motor 61 and the operating mechanism 5. Most of the area of ​​the gear assembly corresponds to the area between the double metal assembly 71 and the operating mechanism 5. The operating mechanism 5 is driven by the reclosing module 6 to achieve automatic opening and closing.

[0125] One improvement of this application is that, Figure 2-4 As shown in 43-51, the motor 61 rotates in a single direction to drive the operating mechanism 5 to automatically close or open the circuit breaker. The gear set includes at least a drive gear 62 and an opening gear 63 that are meshed together. The drive gear 62 first drives the transmission component 51 to rotate, so that the rotating shaft assembly is driven by the transmission component 51 to automatically close the circuit breaker. The opening gear 63 first drives the rotating shaft assembly to rotate to automatically open the circuit breaker. The transmission component 51 is driven by the rotating shaft assembly.

[0126] In this way, the button assembly 31 directly drives the transmission component 51 to rotate for opening and closing. The reclosing module 6 cooperates with the transmission component 51 and the rotating shaft assembly of the operating mechanism 5 through the drive gear 62 and the opening gear 63, respectively, so that the unidirectional rotation of the motor 61 can drive the operating mechanism 5 to automatically open and close the circuit. This can avoid mutual interference between the button assembly 31 and the reclosing module 6 during automatic opening and closing, and also simplify the cooperation structure.

[0127] Preferably, the opening gear 63 drives the rotating shaft assembly indirectly. That is, the opening gear 63 drives the rotating shaft assembly to rotate through a rotating component mounted in the circuit breaker. The rotating component is preferably a traction rod 56, which can reduce the number of internal parts. Of course, it is also possible to configure another rotating component for the opening gear 63 to drive the rotating shaft assembly to open.

[0128] like Figure 43 , 45 As shown in Figures 47, 52, and 53, the drive gear 62 is provided with a closing drive part 621, and the transmission component 51 is provided with a closing driven part 511. The closing drive part 621 and the closing driven part 511 are temporarily connected to drive the transmission component 51 to automatically close and rotate. When the transmission component 51 is driven by the rotating shaft assembly to automatically open or manually close or open, the closing drive part 621 and the closing driven part 511 are separated from each other, effectively preventing the drive gear 62 from causing malfunctions in the transmission component 51 and preventing the button assembly 31 and the reclosing module 6 from interfering with each other during operation. The closing drive part 621 and the closing driven part 511 can be temporary abutment boss structures. Preferably, the closing drive part 621 and the closing driven part 511 are meshing gear parts. Meshing connection helps ensure the stability of the engagement between the drive gear 62 and the transmission component 51, and also helps control the rotational stroke of the drive gear 62 and the transmission component 51. Figure 43 , 45 As shown in Figure 47, the closing drive section 621 is a sector-shaped gear section protruding from the middle of the drive gear 62, as... Figure 52 , 53 As shown, the closing driven part 511 is a gear section provided on the edge of the transmission member 51.

[0129] like Figures 43-47As shown, the traction rod 56 is rotatably mounted between the trip gear 63 and the rotating shaft assembly. The rotating shaft assembly includes a rotatably mounted rotating shaft 52. The rotating shaft 52 and the transmission component 51 are linked and connected through the second connecting rod 582. A latching structure is rotatably mounted on the rotating shaft 52. The trip gear 63 pushes the traction rod 56 to rotate, causing the traction rod 56 to trigger the latching structure to unlock, thereby driving the rotating shaft 52 to perform trip rotation. It has the advantages of simple structure and compact layout. Furthermore, the dual-metal component 71 and the trip gear 63 jointly trigger the latching structure in the operating mechanism 5 to unlock through the traction rod 56. The electromagnetic component 72 directly triggers the latching structure in the operating mechanism 5 to unlock, which can further reduce the number of internal components of the circuit breaker and make the internal structure of the circuit breaker more compact.

[0130] Specifically, such as Figure 55 As shown, the traction rod 56 includes a rotating connecting part 560, a tripping force applying part 562, and a tripping driven part 561. The rotating connecting part 560 is a cylindrical structure. The traction rod 56 is rotatably assembled in the inner shell 22 through the rotating connecting part 560. The tripping force applying part 562 extends outward along the radial direction of the rotating connecting part 560. The tripping driven part 561 extends outward from the connection between the tripping force applying part 562 and the rotating connecting part 560. The tripping driven part 561 and the tripping force applying part 562 are set at an angle, so that the tripping driven part 561 extends towards the direction close to the tripping gear 63. A connecting plate 563 is connected between the tripping force applying part 562 and the tripping driven part 561. The connecting plate 563 can play a supporting role and help increase mechanical strength. Preferably, the rotating connecting part 560, the tripping force applying part 562, the tripping driven part 561, and the connecting plate 563 are an integral structure.

[0131] The tripping gear 63 is equipped with a tripping drive unit 631, which drives the traction rod 56 to rotate. The transmission ratio between the drive gear 62 and the tripping gear 63 is 1:1, which keeps the positions of the tripping drive unit 631 and the closing drive unit 621 relatively fixed. That is, when the tripping gear 63 rotates one revolution, the drive gear 62 also rotates one revolution. This ensures that the positions of the closing drive unit 621 and the tripping drive unit 631 are relatively fixed. When the closing drive unit 621 cooperates with the closing driven unit 511, the tripping drive unit 631 cannot trigger the traction rod 56. When the tripping drive unit 631 cooperates with the traction rod 56, the closing drive unit 621 is deviated from the closing driven unit 511, avoiding mutual interference during the automatic tripping and closing process and preventing malfunctions.

[0132] Preferably, the tripping drive unit 631 is a strip-shaped boss located in the middle of the tripping gear 63, such as... Figure 43 , 45As shown in Figure 47, the tripping drive unit 631 protrudes from the plate surface of the tripping gear 63, and the central axis of the tripping drive unit 631 is along the radial direction of the tripping gear 63; the traction rod 56 is provided with a tripping driven unit 561 and a tripping force applying unit 562. The tripping driven unit 561 is located on the rotation trajectory of the tripping drive unit 631, and the tripping force applying unit 562 triggers the latch structure to unlock.

[0133] Snap fastener structure such as Figures 43-55 As shown, the latching structure includes a latching assembly and a trip latch 54. The latching assembly and one end of the trip latch 54 are latched together. The latching assembly has a release part. During automatic closing, manual closing, and manual opening, the trip latch 54 maintains the latching engagement with the latching assembly. In the event of automatic opening, overload fault, or short circuit fault, the release part is triggered by the opening force application part 562 of the traction rod 56, causing the trip latch 54 to engage with the latching assembly. Figure 46 As shown, the locking assembly includes a driven member 55 and a locking buckle 53, wherein the driven member 55 and the locking buckle 53 are fixedly connected, or the driven member 55 and the locking buckle 53 are an integral structure. Preferably, the driven member 55 and the locking buckle 53 are separate structures. The locking buckle 53 is made of metal material, which has the advantage of good strength, while the driven member 54 is a plastic part, which can play an insulating role. A locking spring 57 is provided between the driven member 55 and the rotating shaft 52. The locking spring 57 is preferably a torsion spring. The locking spring 57, the driven member 55, and the locking buckle 53 are connected together. 3. The locking spring 57 is coaxially rotated on the rotating shaft 52. The two elastic arms of the locking spring 57 abut against the rotating shaft 52 and the driven member 55 respectively. The locking spring 57 provides a restoring force for the driven member 55 and the locking 53. The driven member 55 is provided with a release part. Preferably, the release part is a first release part 551 and a second release part 552. The first release part 551 is used to cooperate with the opening drive part 631 and the double metal component 71 in the opening gear 63. The second release part 552 is used to cooperate with the electromagnetic component 72.

[0134] Preferably, the surface of the first circuit board 641 is parallel to the surface of the drive gear 62, such as... Figure 46 , 59As shown, the first circuit board 641 is provided with a second micro switch 644, and the drive gear 62 is provided with a stop part 622. Preferably, the stop part 622 is a boss structure. The button of the second micro switch 644 is located on the rotation trajectory of the stop part 622. When the stop part 622 triggers the button of the second micro switch 644, it outputs a tripping signal. Preferably, a spring plate 66 is also installed in the inner shell 22. When the stop part 622 and the spring plate 66 abut against each other, they can limit the braking stroke of the drive gear 62, so that the tripping drive part 631 stops at a position away from the release part, preventing the tripping drive part 631 from accidentally triggering the release part at the stopped position, causing a tripping malfunction. Of course, in some embodiments, the drive gear 62 can also be provided with a separate signal control part. The signal control part preferably adopts a boss structure. The signal control part triggers the button of the second micro switch 644. In this case, the stop part 622 is only used to cooperate with the spring plate 66 to control the braking stroke.

[0135] Combination Figure 2-4 Articles 14, 15, 43-61 provide a specific structure of the button assembly 31, the operating mechanism 5, and the reclosing module 6.

[0136] like Figure 2-4 As shown in Figures 11 and 14, the button assembly 31 includes an operating element 311, which is slidably mounted in the button hole. Pressing or pulling the operating element 311 sequentially switches between closing, opening, or unlocking. The operating element 311 is linked to the transmission element 51 via the first connecting rod 581, as shown in Figures 11 and 14. Figure 43 , 44 As shown in Figures 45, 56, and 57, the first connecting rod 581 is strip-shaped, and each end of the first connecting rod 581 is provided with a connecting hole. Each connecting hole is rotatably connected to the operating member 311 and the transmission member 51 through a shaft-like body. Preferably, as shown in Figure 45, 56, and 57, the first connecting rod 581 is strip-shaped, and each end of the first connecting rod 581 is provided with a connecting hole. Figure 57 As shown, a torsion section 5811 may be provided in the middle of the first link 581. By providing the torsion section 5811, the length of the first link 581 or the connection direction between the first link 581 and the operating member 311 can be changed, thereby adapting to the space requirements between the operating member 311 and the transmission member 51 in different circuit breakers. Of course, as... Figure 56 As shown, one of the connecting holes of the first connecting rod 581 can be a strip hole 5812, and the shaft can move within the strip hole 5812, thereby also adapting to the space requirements between the transmission component 51 and the operating component 311.

[0137] Furthermore, the operating component 311 has an internal hollow structure, with its hollow portion serving as an assembly cavity 3110. The opening of the assembly cavity 3110 faces the interior of the outer casing 21. An indicator window 3111 is provided at the end of the assembly cavity 3110 furthest from the inner casing 22. An indicator 312 is rotatably mounted within the assembly cavity 3110, so that the indicating portion of the indicator 312 corresponds to the indicator window 3111. Typically, the indicating portion has a closing indicator area and an opening indicator area. As the operating component 311 moves, the indicator 312 rotates to align different positions of the indicating portion with the indicator window 3111, thus indicating the opening and closing status of the circuit breaker. Figure 14 As shown, the indicator 312 is provided with a rotation switching part 3121, which is located outside the assembly cavity 3110. An indicator switching part 214 is provided on the inner wall of the outer casing 21, as shown... Figure 11 As shown, the indicator switching part 214 is a strip-shaped protrusion protruding inside the housing 21. The rotation switching part 3121 includes two mutually separated protrusions. When the pressing and pulling operation member 311 is used, the indicator switching part 214 abuts against one of the protrusions in the rotation switching part 3121, thereby driving the indicator member 312 to rotate in the assembly cavity 3110.

[0138] Furthermore, a light guide column 313 is provided in the assembly cavity 3110. Preferably, the light guide column 313 is fixed in the assembly cavity 3110 by screws, which can enhance the connection stability between the light guide column 313 and the assembly cavity 3110. One end of the light guide column 313 extends out of the assembly cavity 3110 and can move in a straight line in the housing 21 with the operating component 311, so that it corresponds to the indicator light provided in the housing 21. The other end of the light guide column 313 is located in the assembly cavity 3110. The illumination of the indicator light is transmitted to the indicator window 3111 through the light guide column 313, so that the operating status of the circuit breaker can also be judged.

[0139] Preferably, a partition 16 is provided between the wiring terminal 41 near the button assembly 31 and the button assembly 31. The partition 16 and the outer shell 21 are separate structures for easy demolding. The partition 16 can provide insulation and separation to ensure the safety of manual opening and closing operations. Furthermore, a protruding rib 160 is provided on the side of the partition 16 facing away from the button assembly 31 (operating member 311). The protruding rib 160 can limit and support the wiring terminal. Figure 15 In the middle, the raised rib 160 is in the shape of a mountain; of course, the partition 16 can also be integrated with the outer shell 21, but the circuit breaker will need to be modified more.

[0140] like Figures 43-47As shown in Figures 52-55, the operating mechanism 5 includes a transmission component 51 and a rotating shaft assembly. The transmission component 51 is linked to the operating component 311 via a first connecting rod 581, and the transmission component 51 is linked to the rotating shaft assembly via a second connecting rod 582. The rotating shaft assembly can drive the moving contact 81 in the contact 81 mechanism to contact or separate from the stationary contact 82, thereby realizing the closing and opening of the circuit breaker. Preferably, the second connecting rod 582 is strip-shaped, and the first connecting rod 581 can be strip-shaped, or it can be a strip-shaped plate with a torsion part 5811 in the middle, or it can be a strip-shaped plate with a strip hole 5812 at one end.

[0141] like Figure 53 As shown, the transmission component 51 is structurally similar to the existing transmission component 51. The transmission component 51 includes a disc structure, which is rotatably assembled in the inner shell 22. The middle part of the disc structure has a shaft hole for rotatable assembly, and an annular groove is formed in the middle part of the disc structure. Multiple bosses are provided along the circumference of the annular groove, of which a pair of bosses are used to cooperate with the inner shell 22 to limit the opening and closing rotation stroke of the transmission component 51. A reset torsion spring is assembled in the annular groove, and the reset torsion spring cooperates with the inner shell 22 to drive the transmission component 51 to reset. The disc structure is provided with a mechanism for connecting with the first connecting rod. 581. The connecting hole 513 of the second link 582 is provided on the edge of the disc structure as a gear part 511 for closing. The area of ​​the disc structure near the closing gear part is linked with the first link 581. The area of ​​the disc structure away from the closing drive part 511 preferably protrudes outward to form an extension part 512. The extension part 512 is linked with the rotating shaft assembly through the second link 582. The extension part 512 can cooperate with the inner shell 22 to perform closing limit. Of course, it is also possible to provide a structure for closing limit at other positions of the rotating shaft assembly. Preferably, the transmission member 51 is further provided with a push part 514. The push part 514 is preferably a boss protruding from the transmission member 51, and the push part 514 protrudes along the axial direction of the transmission member 51, that is, the push part 514 protrudes along the thickness direction of the circuit breaker. When the first circuit board 641 is provided with a first micro switch 643, the button of the first micro switch 643 is located on the rotation trajectory of the push part 514. The push part 514 triggers the first micro switch 643, thereby outputting a closing signal.

[0142] The rotating shaft assembly includes a rotating shaft 52 and a latching structure rotatably mounted on the rotating shaft 52. The rotating shaft 52 is rotatably mounted in the inner housing 22. Preferably, the rotating shaft 52 also has a return spring. The rotating shaft 52 drives the moving contact 81 in the contact 81 mechanism. The driving connection between the rotating shaft 52 and the moving contact 81 can adopt existing technology, such as... Figures 49-51As shown in Figure 54, the latch structure includes a latch assembly and a snap fastener 54. The latch assembly and snap fastener 54 are rotatably mounted on the pivot member 52. A latch spring 57, which is a torsion spring, is provided between the latch assembly and the pivot member 52. The latch spring 57, the latch assembly, and the pivot member 52 are coaxially rotatably connected. The two elastic arms of the latch spring 57 elastically abut against the latch assembly and the pivot member 52, respectively. The latch spring 57 provides a tendency for the latch assembly to rotate relative to the pivot member 52, so that the latch assembly and the snap fastener 54 maintain a latching engagement to form a latch structure. One end of the second connecting rod 582 passes through the snap fastener 54 and is linked to the pivot member 52. In this embodiment, the latch assembly includes a latch 53 and a driven member 55, wherein the driven member 55 is fixedly connected to the latch. After being connected, the components are coaxially assembled with the rotating shaft 52. One end of the latch 53 has a latching surface, and correspondingly, one end of the trip latch 54 has a latching surface. The trip latch 54 and the latch form a latching engagement through the latching surfaces. One side of the latch 53 has a clearance transition surface. When the trip latch 54 and the latch 53 are released from the latching engagement, the end of the trip latch 54 with the latching surface corresponds to the clearance transition surface. The driven member 55 has an unlocking part on the side opposite to the trip latch 54. The unlocking part includes mutually separated rods. One rod serves as the first unlocking part 551, which engages with the traction rod 56. The latching structure is unlocked by the bimetallic component 71 and the opening gear 63 in the reclosing module 6, respectively, triggered by the traction rod 56. The other rod serves as the second unlocking part 552, which engages with the electromagnetic component 72. Preferably, in the thickness direction of the circuit breaker, the first unlocking part 551 and the second unlocking part 552 are not located on the same plane.

[0143] like Figure 2-4As shown in Figures 58-60, the reclosing module 6 includes a control component, a motor 61, and a gear set. The control component includes a first circuit board 641 and a second circuit board 642. The first circuit board 641, the motor 61, and the gear set are all housed in the inner casing 22. Preferably, the first circuit board 641 and the gear set are stacked along the thickness direction of the circuit breaker. The first circuit board 641 is provided with a first micro switch 643 and a second micro switch 644. Preferably, the operating mechanism 5 directly triggers the button of the first micro switch 643 to control the output of the control signal. For example, a push-button 514 protrudes from the rotating shaft 52, and the push-button 514 triggers the button of the first micro switch 643 to control the output of the closing signal. In addition, the first micro switch 643 can also be used to control the stopping of the motor 61's rotation. The second micro switch 644 is preferably... The output of the tripping signal is controlled by triggering one of the gears in the gear set. The second circuit board 642 is set outside the inner shell 22 along the length of the circuit breaker. The first micro switch 643 can also be set on the second circuit board 642. Preferably, the first micro switch 643 is set on the second circuit board 642 near the terminal 11, and the button of the first micro switch 643 is located on the moving trajectory of the light guide column 313. The button of the first micro switch 643 is triggered by the light guide column 313 to control the output of the closing signal. The second circuit board 642 is provided with a connector 47 near the plug-in end 12. The plug-in end 12 is provided with a signal socket 15 corresponding to the connector 47. In the thickness direction of the circuit breaker, the connector 47 is located between the two bus clamps 342, that is, the signal socket 15 is located between the two wiring sockets 14.

[0144] like Figure 43 , 58 As shown, the motor 61 is disposed between the operating member 311 and the transmission member 51. The motor 61 is connected to the operating mechanism 5 via a gear set. The gear set includes a drive gear 62 and a trip gear 63 that are meshed together. The drive gear 62 and the trip gear 63 are located on the same side of the transmission member 51. Alternatively, it can be understood that along the width direction of the circuit breaker, the motor 61 is located on one side of the transmission member 51, and the drive gear 62 and the trip gear 63 are located on the other side of the transmission member 51. At least one transmission gear is connected between the output shaft of the motor 61 and the drive gear 62. Figure 58In the circuit breaker, the output shaft of the motor 61 is connected to the drive gear 62 by two meshing transmission gears. Each transmission gear is a double gear, namely the first transmission gear 651 and the second transmission gear 652. The drive gear 62 and the tripping gear 63 are preferably arranged along the length of the circuit breaker. The drive gear 62 can be stacked with the first circuit board 641. The middle part of the drive gear 62 is provided with a stop part 622. The first circuit board 641 is provided with a second micro switch 644. The button of the second micro switch 644 is located on the track of the stop part 622. The stop part 622 triggers the second micro switch 644, thereby outputting a tripping signal.

[0145] The drive gear 62 is a three-part gear, one part of which is a sector-shaped gear with the smallest diameter. This sector-shaped gear serves as the closing drive part 621. Another part of the gear is the same size as the opening gear 63 and is used to mesh with the opening gear 63. The remaining part of the gear has the largest diameter and is used to drive the motor 61. It can be connected by meshing with the transmission gear or directly to the motor 61. When the motor 61 is de-energized, the output shaft of the motor 61 will still drive the drive gear 62 to rotate for a period of time due to inertia. The travel distance of the drive gear 62 during this period is the braking stroke. Preferably, the drive gear 62 also has a stop part 622 protruding from the middle. A spring plate 66 is arranged in the middle of the inner shell 22. When the stop part 622 abuts against the spring plate 66, it can stop the drive gear 62. That is, by the cooperation of the stop part 622 and the spring plate 66, the braking stroke of the drive gear 62 can be controlled.

[0146] The trip gear 63 is a single gear, and a strip-shaped boss serving as the trip drive part 631 is provided in the middle of the trip gear 63. The strip-shaped boss extends radially along the trip gear 63. Preferably, as shown in the figure... Figure 43 , 45 As shown in Figure 47, one end of the strip-shaped boss is blunt rounded or beveled to facilitate the engagement of the tripping drive unit 631 with the tripping driven unit 561 in the traction rod 56. Since the tripping gear 63 and the drive gear 62 are meshed and connected, and both are the same size, the tripping gear 63 and the drive gear 62 rotate in the same number of revolutions. This makes the positions of the closing drive unit 621 and the tripping drive unit 631 relatively fixed. Preferably, the drive gear 62 and the tripping gear 63 are marked with installation marks, such as... Figure 43 , 45As shown, the installation mark of the drive gear 62 is a triangular mark, which is opposite to the closing drive part 621 and is offset from the center line of the closing drive part 621. The installation mark of the opening gear 63 is a circular mark, which is located on the side opposite to the opening drive part 631 and is offset from the center line of the opening drive part 631. When the drive gear 62 and the opening gear 63 are initially assembled, the position of the triangular mark corresponding to the drive gear 62 is meshed with the position of the circular mark corresponding to the opening gear 63. This ensures that when the closing drive part 621 and the closing driven part 511 are engaged, the opening drive part 631 cannot trigger the traction rod 56. When the opening drive part 631 and the traction rod 56 are engaged, the closing drive part 621 is offset from the closing driven part 511.

[0147] Preferred, such as Figure 2-4 As shown, the inner shell 22 also includes an assembly plate 225, which provides an assembly position for the reclosing module 6. That is, the motor 61 is fixed on the assembly plate 225, the gear set is rotatably assembled on the assembly plate 225, and the first connecting rod 581 connected between the operating member 311 and the transmission member 51 can fit against one side of the assembly plate 225 and be linked with the transmission member 51. The assembly plate 225 can provide an assembly position for the reclosing module 6 and the first connecting rod 581, which helps to ensure the stability of the cooperation of each mechanism.

[0148] Combination Figure 2-4 43-47 Briefly describe the manual and automatic opening and closing processes of circuit breakers:

[0149] Pressing the button assembly 31 to the closed position causes the operating component 311 to drive the transmission component 51 to rotate in the closing direction via the first connecting rod 581. Figure 43 , 45 In configuration 47, the closing direction of the transmission component 51 is counterclockwise, and the rotating shaft assembly is driven by the second connecting rod 582 to rotate in the closing direction; when the button assembly 31 is pulled to the opening position, the operating component 311 drives the transmission component 51 to rotate in the opening direction via the first connecting rod 581. Figure 43 , 45 In the case of 47, the opening direction of the transmission component 51 is clockwise. The rotating shaft assembly is driven by the second connecting rod 582 to open and rotate. During the manual opening and closing process, the closing driven part 511 of the transmission component 51 and the closing drive part 621 of the drive gear 62 are separated from each other, so the gear will not be driven to rotate and there will be no malfunction.

[0150] The control component drives the motor 61 to rotate for opening and closing the circuit breaker by outputting control signals. The opening and closing direction of the motor 61 is a single rotation direction. Figure 43 , 45 In section 47, motor 61 rotates counterclockwise to achieve automatic opening and closing of the circuit breaker, specifically as follows:

[0151] When the circuit breaker is automatically driven from the open state to the closed state, its state changes from... Figure 44-47 Switch to Figure 43 The motor 61 drives the drive gear 62 to rotate clockwise through two transmission gears, so that the closing drive part 621 of the drive gear 62 meshes with the closing driven part 511 of the transmission component 51. The drive gear 62 drives the transmission component 51 to rotate counterclockwise, so as to drive the rotating shaft assembly to rotate, so that the moving contact 81 is driven by the rotating shaft assembly to contact the stationary contact 82. At the same time, the drive gear 62 drives the opening gear 63 to rotate counterclockwise. When the rotating shaft assembly rotates to the closing position, the closing drive part 621 and the closing driven part 511 separate, and a distance is left between the closing drive part 621 and the closing driven part 511. This distance can be adjusted by adjusting the brake stroke of the drive gear 62.

[0152] When the circuit breaker is automatically driven from the closed state to the open state, its state changes from... Figure 43 Switching to Figure 44-47 The motor 61 drives the drive gear 62 to rotate clockwise via two transmission gears, causing the closing drive part 621 of the drive gear 62 to continue to separate from the closing driven part 511 of the transmission component 51. The opening gear 63 is driven by the drive gear 62 to rotate counterclockwise, causing the opening drive part 631 on the opening gear 63 to push the opening driven part 561 of the traction rod 56, causing the traction rod 56 to rotate. The opening force part 562 of the traction rod 56 triggers the first release part 551, causing the locking assembly to release the latching engagement with the trip latch 54. The rotating shaft 52 then drives the moving contact 81 to separate from the stationary contact 82. It should be noted that the positions of the closing drive part 621 and the opening drive part 631 are relatively fixed, so that the meshing connection between the closing drive and the closing driven part 511, and the engagement between the opening drive part 631 and the opening driven part 561, cannot occur simultaneously, thereby avoiding malfunctions during automatic opening and closing.

[0153] Since the manual opening and closing of the circuit breaker does not drive the gear set in the reclosing module 6, the gear set in the reclosing module 6 operates slightly differently when the reclosing module 6 and the push-button assembly 21 are operated alternately. Specifically:

[0154] During the circuit breaker's automatic closing-manual opening-automatic closing process, manual opening cannot drive the gear set of the reclosing module 6 to rotate, leaving the gear set still in the position after the first automatic closing. Since the gear set rotates in a single direction, when the reclosing module 6 performs the second automatic closing, the gear set needs to rotate one revolution, that is, from the position after the first automatic closing, through the automatic opening position, and then back to the position after the second automatic closing. When the reclosing module 6 rotates for the second automatic closing, the opening gear 63, during the opening rotation, the opening drive unit 631 first pushes the traction rod 56 to rotate, causing the latch structure in the operating mechanism to briefly disengage. As the opening gear 63 continues to rotate, after the opening drive unit 631 separates from the traction rod 56, the latch structure re-engages under the action of the locking spring 57. When the closing drive unit 621 of the drive gear 62 meshes with the closing driven unit 511 of the transmission component 51, the automatic closing is completed.

[0155] During the circuit breaker's automatic tripping-manual closing-automatic tripping process, manual closing cannot drive the gear set of the reclosing module 6 to rotate, leaving the gear set still in the position after the first tripping. When the reclosing module 6 performs the second automatic tripping, the gear set needs to rotate one revolution, that is, from the position after the first automatic tripping, through the automatic closing position, and then to the position of the second automatic tripping. Since the transmission component 51 is driven to rotate during manual closing, the closing driven part 511 deviates from the rotation trajectory of the closing drive part 621, so that the drive gear 62 will not mesh with the closing driven part 511 when passing through the automatic closing position, and thus will not drive the circuit breaker to close, until the opening drive part 631 of the opening gear 63 drives the traction rod 56 to rotate, triggering the operating mechanism 5 to trip.

[0156] One improvement of this application is that a protective mechanism 32 is also provided inside the housing 21. The protective mechanism 32 prevents the circuit breaker from being installed in the cabinet in the closed state or from being pulled out of the cabinet in the closed state, so that the circuit breaker can only be installed in the cabinet in the open state, thus ensuring the safety of the circuit breaker assembly and use.

[0157] Specifically, such as Figure 14-29As shown, the protective mechanism 32 includes a locking member 321 and a locking elastic member 322. The locking member 321 is located between the operating member 311 and the locking hole 211. The locking elastic member 322 provides a driving force to the locking hole 211, causing the locking part 3211 of the locking member 321 to extend out of the locking hole 211. An abutment part 310 is also provided between the operating member 311 and the locking member 321. Pressing or pulling the operating member 311 switches the engagement position between the abutment part 310 and the locking member 321. When the operating member 311 is in the closed position, the operating member 311 and the locking member 321 are engaged. When the abutment part 321 is simultaneously pressed against the locking part 310, the locking part 3211 located outside the locking hole 211 cannot be pushed into the housing 21. When the operating part 311 is in the open position, at least a part of the locking part 3211 can be pushed into the housing 21. That is, at least a part of the locking part 3211 can be pushed into the housing 21 by the side wall of the cabinet. When the operating part 311 is in the pull-out unlock position, the locking part 3211 is driven by the operating part 311 to retract into the housing 21.

[0158] When the circuit breaker is not installed in the cabinet, when the operating part 311 is in the closed position, the locking part 3211 extending out of the locking hole 211 prevents the circuit breaker from being inserted into the cabinet. When the operating part 311 is in the open position, the locking part 3211 can be pressed back into the outer shell 21 of the circuit breaker by the side wall of the cabinet, so that the circuit breaker can only be installed in the cabinet in the open position.

[0159] When the circuit breaker is installed in the cabinet and the operating element 311 is in the closed position, the locking part 3211 extending out of the locking hole 211 engages with the limit hole of the cabinet, and the locking part 3211 cannot retract into the outer casing 21, so that the circuit breaker cannot be pulled out of the cabinet when closed. When the operating element 311 is in the open position or the pull-out unlock position, the locking part 3211 can retract into the outer casing 21, so that the circuit breaker can be pulled out, thus ensuring the safety of the circuit breaker's disassembly, installation and use.

[0160] Preferred, such as Figure 14 , 17 As shown in Figures 19, 21, 22, 24, and 26, the abutment 310 is a protrusion on the side wall of the operating member 311 and / or on the side of the locking member 321 opposite to the locking part 3211, in the direction of the circuit breaker being inserted into or removed from the cabinet. When the abutment 310 is protruding on the lower wall of the operating member 311, it has the advantages of simple structure, small space occupation, and good limiting effect. Furthermore, when the abutment 310 is located on the side of the locking member 321 opposite to the locking part 3211, before the circuit breaker is assembled in place, the abutment 310 stops the closing press of the operating member 311, so that the circuit breaker cannot be in the closed state before being installed in the cabinet, which helps to ensure the safety of the circuit breaker's installation and removal.

[0161] Furthermore, the locking elastic element 322 can drive the locking element 321 to move along a straight line, so that the locking part 3211 can extend or retract along a straight line. Alternatively, the locking elastic element 322 can drive the locking element 321 to rotate around an axis, so that the locking part 3211 can extend or retract. The two ways of cooperating between the locking element 321 and the locking elastic element 322 can meet the usage requirements of different circuit breakers and have a wide range of applications.

[0162] Combination Figure 14-20 A first embodiment of providing a protective mechanism 32.

[0163] like Figure 14-20 As shown, the protective structure includes a locking member 321, a locking spring, and a pressing member 323. The locking member 321 is driven by the locking elastic member 322 to move linearly. The side of the locking member 321 facing the locking hole 211 is also provided with a force-receiving part 3212. The pressing member 323 is driven by the operating member 311 to move linearly. In this embodiment, the pressing member 323 moves along the length direction of the circuit breaker. The pressing member 323 is provided with a pressing part 3231. When the operating member 311 is in the closed or open position, the pressing part 3231 separates from the force-receiving part 3212, so that the locking part 3211 can remain in the state of extending out of the locking hole 211. When the operating member 311 is in the pull-out unlock position, the pressing part 3231 presses the force-receiving part 3212, so that the unlocked locking member 321 is driven to move closer to the operating member 311, so that the locking part 3211 retracts into the outer shell 21.

[0164] Preferred, such as Figure 14 , 16 As shown in Figure 17, the operating member 311 is provided with a driving boss 3112, which is located on the side of the operating member 311 facing the locking hole 211. The pressing member 323 is provided with a driven boss 3236. When the operating member 311 is pulled to the pull-unlock position, the driving boss 3112 and the driven boss 3236 cooperate to drive the pressing member 323 to move with the operating member 311. Furthermore, a pressing reset member 324 is provided between the pressing member 323 and the outer shell 21 for pressing reset. The component 324 is located between the pressing component 323 and the inner wall of the operating end 11. The pressing reset component 324 can provide a reset force for the pressing component 323. The pressing reset component 324 is preferably a tension spring or a compression spring. It can also be understood that when the operating component 311 is in the closed or open position, the pressing reset component 324 keeps the pressing component 323 in its original position. When the operating component 311 is pulled to the pull-out unlock position, it needs to overcome the elastic force of the pressing reset component 324 to drive the pressing component 323 to move.

[0165] The pressing member 323 is always located between the locking member 321 and the locking hole 211. A clearance space 3232 is provided in the middle of the pressing member 323. When the operating member 311 is in the closed or open position, the force-bearing part 3212 is located within the clearance space 3232. When the operating member 311 is in the pull-out unlock position, the force-bearing part 3212 moves out of the clearance space 3232, so that it is located outside the clearance space 3232 to cooperate with the pressing member 3231, thereby causing the locking member 3211 to retract into the locking hole 211. Alternatively, the pressing member 323 can be arranged side-by-side with the locking member 321, and only in the pull-out unlock position is the pressing member 323 located between the locking member 321 and the locking hole 211.

[0166] Furthermore, the locking member 321 is provided with two force-receiving parts 3212, which are symmetrically distributed on opposite sides of the locking part 3211. The pressing member 323 is provided with two pressing parts 3231, and a relief groove 3233 is provided between the two pressing parts 3231. The relief groove 3233 is used to avoid the locking part 3211, so that the locking part 3211 can move within the relief groove 3233. Through the cooperation of the two force-receiving parts 3212 and the two pressing parts 3231, the force can be evenly distributed, which is conducive to the stable driving of the locking part 3211. Of course, it is also possible to provide a force-receiving part 3212 only on one side of the locking part 3211, but the pressing member 323 may need a larger pressing force.

[0167] The locking elastic member 322 has at least one twisted portion, which is rotatably mounted between the operating member 311 and the locking hole 211. The first elastic arm of each twisted portion elastically abuts against the inner sidewall of the housing 21, and the second elastic arm of the twisted portion abuts against the locking member 321 to keep the locking portion 3211 protruding out of the locking hole 211.

[0168] Combination Figure 16-24 This embodiment provides a preferred solution and its specific working principle:

[0169] like Figure 16-20 As shown, the locking elastic member 322 includes two twisted portions. The first elastic arms of the two twisted portions extend towards each other and are connected together to elastically abut against the inner sidewall of the housing 21, which helps to improve the stability of the fit between the first elastic arm and the sidewall of the housing 21. The second elastic arm of each twisted portion passes through the elastic drive groove 3215 in a locking member 321 respectively, and the end of each second elastic arm is bent to form an anti-disengagement portion. When the locking elastic member 322 drives the locking part 3211 to move, the second elastic arm will move relative to the elastic drive groove 3215 when it is engaged. The anti-disengagement portion can prevent the second elastic arm from separating from the elastic drive groove 3215, thus ensuring the fit stability of the structure.

[0170] like Figure 16-20As shown, the locking member 321 includes a plate-shaped body with rectangular bosses at both ends. A locking part 3211 protrudes from the plate-shaped body between the two rectangular bosses. A force-bearing part 3212 is formed between the locking part 3211 and an adjacent rectangular boss. The force-bearing part 3212 includes a force-bearing plane and a mating arc surface that are connected to each other. The force-bearing plane is used to be pressed by the force-bearing part 3231, causing the locking part 3211 of the locking member 321 to retract into the housing. The mating arc surface is used to slide with the pressing part 3231. Each rectangular boss has an elastic drive groove 3215 on the side opposite to the locking part 3211. The elastic drive groove 3215 passes through the length direction of the circuit breaker. The plate-shaped body has a boss as an abutment part 310 on the side opposite to the locking part 3211.

[0171] like Figure 16-20 As shown, the pressing member 323 includes a plate-shaped body. Both ends of the plate-shaped body protrude to form a driven boss 3236 and a pressing portion 3231, respectively. The pressing portion 3231 includes a pressing plane and a mating inclined plane connected to each other. The pressing plane is used to press the force-bearing portion 3212, causing the locking portion 3211 of the locking member 321 to retract into the outer shell. The locking member 321 drives the locking portion 3211 through the mating inclined plane cooperating with the pressing portion 3231. The driven boss 3236 cooperates with the driving boss 3112 protruding from the operating member 311. A circular shaft 3234 is provided on both sides of the driven boss 3236. Each twisted portion is rotatably mounted on the circular shaft 3234, causing the locking elastic member 3231 to retract into the outer shell. 22 moves together with the pressing part 323, and the locking elastic part 322 can also rotate around the circular shaft 3234. The driven boss 3236 is provided with a positioning shaft 3235 on the side opposite to the pressing part 3231. A pressing reset part 324 is provided between the positioning shaft 3235 and the inner side wall of the outer shell 21. A recessed area is provided between the pressing part 3231 and the driven boss 3236 as a clearance space 3232. A clearance groove 3233 is provided at one end of the plate-shaped body with the pressing part 3231. The clearance groove 3233 has an opening at the end away from the driven boss 3236, so that the pressing part 3231 is divided into two parts. The locking part 3211 moves in the clearance groove 3233.

[0172] Its working process is as follows:

[0173] Before the circuit breaker is fully assembled, when the circuit breaker is in the closed state, see [reference needed]. Figure 21 , 22When the circuit breaker is in the open state, the abutment part 310 abuts against both the locking member 321 and the operating member 311. The force-bearing part 3212 is located within the clearance space 3232. The locking part 3211 passes through the clearance groove 3233 and extends beyond the outer casing 21. The locking part 3211 cannot retract into the outer casing 21 under external force, thus preventing it from being installed in the cabinet. When the circuit breaker is in the open state, the abutment part 310 no longer abuts against the side wall of the operating member 311. The force-bearing part 3212 moves relative to the pressing member 323, but remains within the clearance space 3232. The locking member 3211... Driven by the second elastic arm of the locking elastic member 322, the locking part 3211 passes through the relief groove 3233 and remains extended out of the locking hole 211. When installed in the cabinet, the side wall of the cabinet presses the locking part 3211, allowing the locking member 321 to move towards the operating member 311. The locking part 3211 retracts into the locking hole 211. At this time, the abutment part 310 is located on the closing trajectory of the operating member 311. The abutment part 310 blocks the closing press of the operating member 311, thereby preventing the circuit breaker from closing and ensuring the safety of the assembly process.

[0174] Once the circuit breaker is in place, the locking part 3211 can engage with the limit hole in the cabinet, and the abutment part 310 moves out of the closing trajectory of the operating member 311, allowing the operating member 311 to be pressed into the closing position.

[0175] When the operating element 311 is pressed to the closed position, see Figure 21 , 22 Pressing the reset member 324 causes the pressing member 323 to move together with the operating member 311, so that the locking part 3211 passes through the relief groove 3233 and remains in the state of extending out of the locking hole 211. The locking part 3211 is engaged in the limit hole of the cabinet. The force-bearing part 3212 of the locking member 321 is located in the relief space 3232 of the pressing member 323. The abutting part 310 simultaneously abuts against the locking member 321 and the operating member 311, so that the locking part 3211 is engaged in the limit hole of the cabinet and cannot be pushed into the outer shell 21 by external force. At this time, the circuit breaker cannot be pulled out of the cabinet, ensuring that the circuit breaker in the closed state cannot be pulled out of the cabinet.

[0176] When the operating member 311 is pulled to the open position, the abutment part 310 no longer abuts against the side wall of the operating member 311, allowing the locking part 3211 to retract into the housing 21. As the operating member 311 is pulled to the open position, the relative position of the pressing member 323 and the operating member 311 changes slightly. At this time, the locking part 3211 and the force-receiving part 3212 have moved slightly a distance compared to the closed state, but the locking part 3211 and the force-receiving part 3212 are still located in the clearance space 3232 and the clearance groove 3233, respectively.

[0177] When continuing to pull the operating component 311 to the pull-unlock position, see... Figure 23 ,24 The driving boss 3112 of the operating member 311 abuts against the driven boss 3236 of the pressing member 323, so that the pressing member 323 can overcome the elastic force of the pressing reset member 324 and move together with the operating member 311. At this time, the locking part 3211 moves out of the relief groove 3233 of the pressing member 323, and the two force-bearing parts 3212 move out of the relief space 3232, so that the two pressing parts 3231 of the pressing member 323 press the force-bearing parts 3212 respectively. After overcoming the elastic force of the second elastic arm of the locking elastic member 322, the locking member 321 moves in a straight line into the housing 21, so that the locking part 3211 retracts into the housing 21, and the circuit breaker can be pulled out of the cabinet.

[0178] Combination Figure 25-29 A second embodiment of the protective mechanism 32 is provided, which includes a locking member 321 and a locking elastic member 322, eliminating the need for a pressing member 323, thus saving parts and reducing costs; the locking member 321 is rotatably mounted between the operating member 311 and the locking hole 211, and the abutment portion 310 is fixed to the side wall of the operating member 311, i.e., as shown in the second embodiment. Figure 25-26 As shown, the abutment portion 310 may be formed by protruding from the side wall of the operating member 311, or, as... Figure 29 As shown, the abutment part 310 is fixedly connected to the operating member 311. On the side of the locking member 321 facing away from the locking part 3211, there is a force-bearing part 3212 and a clearance space 3214. The force-bearing part 3212 is located at the end away from the locking part 3211, and the area of ​​the clearance space 3214 away from the force-bearing part 3212 is a limiting surface. The limiting surface is located facing away from the locking part 3211. When the operating member 311 is in the closed position, the abutment part 310 and the locking member 321 face away from the locking part 3211. When one side of 211 is pressed against the locking part 3211, the locking part 3211 cannot be pushed back into the housing 21 by external force. When the operating member 311 is in the open position, the abutting part 310 can slide towards the force receiving part 3212 in the clearance space 3214. At this time, the locking part 3211 can be pushed back into the housing 21 by external force. When the operating member 311 is in the pull-out unlocking position, the abutting part 310 cooperates with the force receiving part 3212 to make the locking member 321 rotate in the direction of retracting into the housing 21.

[0179] Specifically, such as Figure 25As shown, a boss protrudes from the side wall of the operating member 311, which serves as the abutment part 310. Two adjacent sides of the abutment part 310 are the first abutment surface and the second abutment surface. Preferably, the first abutment surface is inclined, and the second abutment surface is slightly curved, so that the angle between the first and second abutment surfaces is less than 90°, facilitating the cooperation between the second abutment surface and the force-bearing part 3212. When the operating member 311 is in the closed position, the first abutment surface abuts against the side of the locking member 321 facing away from the locking part 3211. When the operating member 311 is in the open position, the first abutment surface can slide with the clearance space 3214. When the operating member 311 is in the pull-out unlocking position, the second abutment surface cooperates with the force-bearing part 3212 to drive the locking member 321 to rotate. Alternatively, as... Figure 29 As shown, the side wall of the operating member 311 has a pair of fixed bosses protruding out, and a protrusion is assembled between the pair of bosses. A portion of one side of the protrusion extends out to form an abutment portion 310.

[0180] In this embodiment, as Figure 27 As shown, the locking member 321 includes a rod-shaped body. One end of the rod-shaped body is provided with a connecting shaft, and the other end of the rod-shaped body protrudes to form a rectangular boss that serves as a locking part 3211. The side of the rod-shaped body opposite to the locking part 3211 forms an arc-shaped concave surface that serves as a clearance space 3214. The rod-shaped body protrudes to provide a force-bearing part 3212. In the figure, the force-bearing part 3212 is an arc-shaped boss. The force-bearing part 3212 is located on the side opposite to the locking part 3211, and the force-bearing part 3212 is close to the connecting shaft and connects with the clearance space 3214. The rod-shaped body is also provided with an elastic abutment part. In the figure, the elastic abutment part is a small boss.

[0181] like Figure 25 , 26 As shown in Figures 28 and 29, the locking elastic element 322 includes a twisted portion sleeved on the connecting shaft. This can be understood as being arranged side-by-side in the thickness direction of the circuit breaker. One elastic arm of the twisted portion elastically abuts against the inner wall of the housing 21, and the other elastic arm of the twisted portion elastically abuts against the elastic abutment portion. Figure 25 , 26 As shown, the locking elastic element 322 is disposed on the side of the locking element 321 near the light guide post 313. The two elastic arms of the twisted part are straight rods, each extending along the tangential direction of the twisted part, and the rod body directly abuts against the inner wall of the locking element 321 or the outer shell 21 to achieve elastic contact; as shown Figure 28 , 29As shown, the locking elastic element 322 is disposed on the side of the locking member 321 near the indicator 312. One elastic arm of the twisted portion extends axially along the twisted portion, and the other elastic arm extends radially along the twisted portion. The end of the elastic arm is bent to elastically abut against the locking member 321. Of course, in this embodiment, there can also be two locking elastic elements 322, which are symmetrically disposed on both sides of the locking member 321. In addition, when the abutment portion 310 is formed by a protrusion fitted onto the side wall of the operating member 311, the protrusion, the locking member 321, and the locking elastic element 322 are arranged side by side in the thickness direction of the circuit breaker.

[0182] Its working process is as follows:

[0183] Before the circuit breaker is fully assembled, when the circuit breaker is in the closed state, the first contact surface of the abutment part 310 abuts against the side of the locking member 321 opposite to the locking part 3211. The locking part 3211 extends out of the housing 21 and cannot retract into the housing 21 under external force. That is, the locking part 3211 cannot be pushed back into the housing 21 under the pressure of the cabinet side wall, thus it cannot be installed in the cabinet. When the circuit breaker is in the open state, the abutment part 310 no longer abuts against the side of the locking member 321 opposite to the locking part 3211. Instead, as the operating member 311 is pulled, the first contact surface of the abutment part 310 slides along the arc-shaped concave surface of the clearance space 3214. The inclined surface of the first contact surface and the arc-shaped concave surface facilitate sliding cooperation, so that the locking part 3211 can overcome the elastic force of the locking elastic member 322 and retract into the outer shell 21 under the action of external force. When installed in the cabinet, the side wall of the cabinet presses the locking part 3211, so that the locking member 321 can rotate towards the operating member 311, and the locking part 3211 retracts into the locking hole 211.

[0184] Once the circuit breaker is in place, the locking part 3211 can engage with the limit hole in the cabinet.

[0185] When the operating member 311 is pressed to the closed position, the abutting part 310 abuts against the side of the locking member 321 opposite to the locking part 3211. That is, the abutting part 310 simultaneously presses against the locking part 3211 and the operating member 311, so that the locking part 3211 is kept in the state of extending out of the locking hole 211. The locking part 3211 is locked in the limit hole of the cabinet and cannot be pushed into the outer casing 21 by external force. At this time, the circuit breaker cannot be pulled out of the cabinet, ensuring that the circuit breaker in the closed state cannot be pulled out of the cabinet.

[0186] When the operating member 311 is pulled to the open position, the first contact surface of the abutment part 310 slides along the clearance space 3214 of the locking member 321, and the abutment part 310 and the locking member 321 no longer abut against each other at the same time, so that the locking part 3211 can retract into the housing 21.

[0187] When the operating member 311 is pulled to the pull-out unlock position, the abutment part 310 and the force receiving part 3212 cooperate to drive the locking member 321 to overcome the elastic force of the locking elastic member 322, so that the locking member 321 rotates in the direction of retracting into the housing 21, so that the locking part 3211 retracts into the housing 21 and can be pulled out from the cabinet.

[0188] Of course, the protective mechanism 32 may also omit the locking elastic element 322, such as Figure 11 , 30 As shown in Figure -37, the protective mechanism 32 includes a locking member 321 and a pressing member 323. The locking member 321 is slidably mounted between the operating member 311 and the locking hole 211, so that the locking part 3211 of the locking member 321 can be driven by the operating member 311 to extend out of the locking hole 211 or retract into the housing 21. The pressing member 323 is driven by the operating member 311 to move linearly along with the operating member 311. Similarly, an abutment part 310 is provided between the locking member 321 and the operating member 311. Pressing or pulling the operating member 311 switches the engagement position of the abutment part 310 and the locking member 321. When the operating member 311 is pressed to the closed position, the locking member 321 is pressed tightly, that is, the locking member 321... The abutting part 310 is pressed against, preventing the locking part 3211 located outside the locking hole 211 from being pushed into the housing 21. When the operating member 311 is pulled to the open position, at least a part of the locking part 321 can be pushed into the housing 21. When the operating member 311 is pulled to the pull-out unlock position, the pressing member 323 presses the locking member 321, causing the locking part 3211 to retract into the housing 21. With this structure, the locking elastic member 322 is omitted in the protective mechanism 32, and the locking member 321 is still slidably assembled between the locking hole 211 and the operating member 311. The operating member 311 drives the pressing member 323 to slide linearly, which simplifies the structure and reduces the space required for component movement.

[0189] When the circuit breaker is not installed in the cabinet, when the operating part 311 is in the closed position, the locking part 3211 extending out of the locking hole 211 prevents the circuit breaker from being inserted into the cabinet. When the operating part 311 is in the open position, the locking part 3211 can be pressed back into the circuit breaker housing 21 by the side wall of the cabinet, so that the circuit breaker can only be installed in the cabinet in the open position.

[0190] When the circuit breaker is installed in the cabinet and the operating element 311 is in the closed position, the locking part 3211 extending out of the locking hole 211 engages with the limit hole of the cabinet, and the locking part 3211 cannot retract into the outer casing 21, so that the circuit breaker cannot be pulled out of the cabinet when closed. When the operating element 311 is in the open position or the pull-out unlock position, the locking part 3211 can retract into the outer casing 21, so that the circuit breaker can be pulled out, thus ensuring the safety of the circuit breaker's disassembly, installation and use.

[0191] Preferably, an abutment portion 310 is also provided between the operating member 311 and the locking member 321, such as... Figure 31 As shown, the abutment part 310 is also located on the side of the operating member 311 and the locking member 321 opposite to the locking member 3211. When the operating member 311 is in the closed position, the abutment part 310 can simultaneously abut against the side wall of the operating member 311 and the side of the locking member 321 opposite to the locking member 3211. When the operating member 311 is in the open position or the pull-out unlocking position, the abutment part 310 separates from the side wall of the operating member 311, or the abutment part 310 separates from the side of the locking member 321 opposite to the locking member 3211, thereby unlocking the locking member 321 and the operating member 311.

[0192] Furthermore, the locking member 321 has a force-receiving part 3212 on the side facing the locking hole 211, and a limiting surface on the side of the locking member 321 facing away from the locking part 3211. The pressing member 323 has a pressing part 3231. When the operating member 311 is in the closed position, the abutting part 310 abuts against the limiting surface, locking the locking member 321. At this time, the locking part 3211 remains in the state of extending out of the locking hole 211 and cannot be pushed into the housing 21 by external force. When the operating member 311 is in the open position, the abutting part 310 separates from the limiting surface, allowing the locking part 3211 to be pushed into the housing 21 by external force. When the operating member 311 is in the pull-out unlocking position, the pressing part 3231 presses the force-receiving part 3212, causing the unlocked locking member 321 to be driven to slide into the housing 21. At this time, the circuit breaker can be pulled out of the cabinet.

[0193] like Figure 31 As shown, the operating member 311 is also provided with a limiting boss 3113. The limiting boss 3113 and the abutment part 310 are spaced apart and disposed on the same side wall of the operating member 311. The pressing member 323 is provided with a driven boss 3236. When the operating member 311 is pulled, the abutment part 310 cooperates with the driven boss 3236, thereby driving the pressing member 323 to move with the operating member 311. The driven boss 3236 can slide between the limiting boss 3113 and the abutment part 310. Preferably, the pressing member 323 is also connected to a pressing reset member 324. Preferably, a tension spring or a compression spring is used. The pressing reset member 324 is located between the pressing member 323 and the inner wall of the outer casing 21, and between the pressing member 323 and the inner wall of the operating end 11. The pressing reset member 324 provides a reset force for the pressing member 323. It can also be understood that when the operating member 311 is in the closed or open position, the pressing reset member 324 keeps the pressing member 323 in its original position. When the operating member 311 is pulled to the pull-out unlock position, it needs to overcome the elastic force of the pressing reset member 324 to drive the pressing member 323 to move.

[0194] Furthermore, similar to the first embodiment, the pressing member 323 is always located between the locking member 321 and the locking hole 211. A clearance space 3232 is provided in the middle of the pressing member 323. When the operating member 311 is in the closed or open position, the force-bearing part 3212 is located within the clearance space 3232. When the operating member 311 is in the pull-out unlock position, the force-bearing part 3212 moves out of the clearance space 3232, so that the force-bearing part 3212 is located outside the clearance space 3232 to cooperate with the pressing member 3231, thereby causing the locking member 3211 to retract into the locking hole 211. Of course, the pressing member 323 can also be arranged side by side with the locking member 321, and the pressing member 323 is located between the locking member 321 and the locking hole 211 only when the pull-out unlock position is reached.

[0195] Furthermore, the locking member 321 is provided with two force-receiving parts 3212, which are symmetrically distributed on opposite sides of the locking part 3211. The pressing member 323 is provided with two pressing parts 3231, and a relief groove 3233 is provided between the two pressing parts 3231. The relief groove 3233 is used to avoid the locking part 3211, so that the locking part 3211 can move within the relief groove 3233. Through the cooperation of the two force-receiving parts 3212 and the two pressing parts 3231, the force can be evenly distributed, which is conducive to the stable driving of the locking part 3211. Of course, it is also possible to provide a force-receiving part 3212 only on one side of the locking part 3211, but the pressing member 323 may need a larger pressing force.

[0196] Preferred, such as Figure 11 , 33 As shown, a sliding guide structure is provided between the locking member 321 and the inner sidewall of the outer shell 21. The sliding guide structure includes a sliding part 215 and a sliding groove 3213 that cooperate with each other. The sliding groove 3213 is provided on the locking part 3211, and the sliding part 215 is located in the area of ​​the outer shell 21 near the locking hole 211, thereby ensuring the sliding direction of the locking member 321 and avoiding sliding deviation, which would cause poor fit.

[0197] Combination Figure 11 , 30 -37 provides the preferred solution in this embodiment, as well as the specific working principle of this solution. The locking member 321 and the pressing member 323 in this embodiment can be understood as a simplified structure in the first embodiment. That is, the locking member 321 in the first embodiment no longer has the abutting part 310, and the locking member 321 and the pressing part 3231 no longer have a structure connected to the locking elastic member 322.

[0198] like Figure 31 , 32As shown, the locking component 321 includes a plate-shaped body with rectangular bosses at both ends. A locking part 3211 protrudes from the plate-shaped body between the two rectangular bosses. A force-bearing part 3212 is formed between the locking part 3211 and an adjacent rectangular boss. Preferably, each force-bearing part 3212 has an arc-shaped mating surface. The pressing part 3231 slides with the arc-shaped mating surface. A groove 3213 is provided in the middle of the plate-shaped body. The groove 3213 corresponds to the bottom surface of the locking part 3211. Correspondingly, a sliding part 215 protrudes from the side wall of the outer shell 21 below the locking hole 211. The sliding part 215 slides with the groove 3213, which can both restrict the movement trajectory of the locking part 3211 and provide an assembly position for the locking component 321.

[0199] like Figure 31 , 33 As shown, the pressing member 323 includes a plate-shaped body. The two ends of the plate-shaped body respectively protrude to form a driven boss 3236 and a pressing part 3231. The driven boss 3236 cooperates with the driving boss 3112 protruding from the operating member 311. A recessed area is provided between the pressing part 3231 and the driven boss 3236 as a clearance space 3232. One end of the plate-shaped body with the pressing part 3231 is provided with a clearance groove 3233. The clearance groove 3233 has an opening at the end away from the driven boss 3236, so that the pressing part 3231 is divided into two parts. The locking part 3211 moves in the clearance groove 3233.

[0200] Its working process is similar to that of the first embodiment, specifically as follows:

[0201] Before the circuit breaker is fully assembled, when the circuit breaker is in the closed state, the abutment part 310 simultaneously abuts against the locking member 321 and the operating member 311. The force-bearing part 3212 is located within the clearance space 3232, and the locking part 3211 passes through the clearance groove 3233 and extends out of the housing 21. The locking part 3211 cannot retract into the housing 21 under external force, thus preventing it from being installed in the cabinet. When the circuit breaker is in the open state, the abutment part 310 no longer abuts against the side wall of the locking member 321, and the force-bearing part 3212 relative to the button... The pressure member 323 moves, but the force-bearing part 3212 remains within the clearance space 3232, so that the locking part 3211 passes through the clearance groove 3233 and remains extended out of the locking hole 211. When installed in the cabinet, the side wall of the cabinet presses the locking part 3211. With the cooperation of the sliding part 215 and the sliding groove 3213, the locking member 321 can move towards the operating member 311. The locking part 3211 retracts into the locking hole 211, so that the circuit breaker can be installed in the cabinet, thereby ensuring the safety of the assembly process.

[0202] Once the circuit breaker is in place, the locking part 3211 can engage with the limit hole in the cabinet, and the abutment part 310 no longer abuts against the locking part 321, allowing the operating part 311 to be pressed to the closed position.

[0203] like Figures 34-35 As shown, when the operating member 311 is pressed to the closed position, the pressing reset member 324 causes the pressing member 323 to move together with the operating member 311, so that the locking part 3211 passes through the relief groove 3233 and remains in the state of extending out of the locking hole 211. The locking part 3211 is engaged in the limit hole of the cabinet. The force-bearing part 3212 of the locking member 321 is located in the relief space 3232 of the pressing member 323. The abutting part 310 simultaneously abuts against the locking member 321 and the operating member 311, so that the locking part 3211 is engaged in the limit hole of the cabinet and cannot be pushed into the outer casing 21 by external force. At this time, the circuit breaker cannot be pulled out of the cabinet, ensuring that the circuit breaker in the closed state cannot be pulled out of the cabinet.

[0204] When the operating member 311 is pulled to the open position, the abutment part 310 no longer abuts against the side of the locking member 321 opposite to the locking part 3211, allowing the locking part 3211 to retract into the housing 21. However, without external force, it remains in the state of extending out of the locking hole 211. At the same time, as the operating member 311 is pulled to the open position, the relative position of the pressing member 323 and the operating member 311 changes slightly. At this time, the locking part 3211 and the force-receiving part 3212 have moved slightly a distance compared to the closed state, but the locking part 3211 and the force-receiving part 3212 are still located in the clearance space 3232 and the clearance groove 3233, respectively.

[0205] like Figure 36 , 37 As shown, when the operating member 311 is pulled to the pull-unlock position, the driving boss 3112 of the operating member 311 abuts against the driven boss 3236 of the pressing member 323, so that the pressing member 323 can move together with the operating member 311. At this time, the locking part 3211 moves out of the relief groove 3233 of the pressing member 323, and the two force-bearing parts 3212 move out of the relief space 3232, so that the two pressing parts 3231 of the pressing member 323 press the force-bearing parts 3212 respectively, and the locking member 321 moves in a straight line into the housing 21, so that the locking part 3211 retracts into the housing 21, and the circuit breaker can be pulled out of the cabinet.

[0206] It should be noted that when the pressing member 323 is equipped with a pressing reset member 324, when the operating member 311 is in the closed or open position, the pressing reset member 324 can keep the pressing member 323 in its original position. When the operating member 311 is pulled to the pull-out unlock position, the operating member 311 needs to overcome the elastic force of the pressing reset member 324 to drive the pressing member 323 to move.

[0207] One improvement of this application is that, Figure 8 , 13As shown, the outer wall of the inner shell 22 is provided with a protruding support column 223. The end of the support column 223 abuts against the inner wall of the outer shell 21. The middle part of the support column 223 is provided with multiple gas flow grooves 2231, at least two of which are connected to each other, allowing gas inside the inner shell 22 and the outer shell 21 to flow through the gas flow grooves. In this way, the support column 223 supports the inner shell 22 inside the outer shell 21, which can stabilize the positional relationship between the inner shell 22 and the outer shell 21. At the same time, the gas flow grooves 2231 on the support column 223 allow air to flow between the inner shell 22 and the outer shell 21, which is beneficial for heat dissipation.

[0208] Preferably, the support column 223 is a cylinder with a hollow area. Of course, the support column 223 can also be other shapes, such as rectangles or polygons. The number of support columns 223 is not limited to one; there can be multiple columns. Figure 13 As shown, the support column 223 is located in the middle of the inner shell 22, and the support column 223 is coaxial with the rotating shaft 52 in the operating mechanism 5. The support column 223 is formed by protruding outward from the side wall of the inner shell 22.

[0209] Multiple gas flow channels 2231 connecting the hollow areas are provided on the side wall of the support column 223. Preferably, the gas flow channels 2231 are provided at the end edge of the support column 223, and the multiple gas flow channels 2231 are arranged at intervals along the circumference of the support column 223, which facilitates the flow of gas in different directions, improves the gas flow effect, and is conducive to heat dissipation.

[0210] In addition, it should be noted that heat dissipation holes can also be provided on the inner shell 22 to facilitate further heat dissipation of the circuit breaker.

[0211] Another improvement in this application is that, Figure 1-4 As shown in Figures 9 and 10, an adjustment port 212 is provided in the middle of the outer shell 21, and a connecting area 221 is provided in the inner shell 22. Both the adjustment port 212 and the connecting area 221 correspond to the adjustment screw 713 of the bimetallic component 71. The adjustment port 212 is closed by a sliding cover 213. In this way, it has the advantages of simple structure and convenient operation of the adjustment screw 713.

[0212] Preferably, the adjustment port 212 is provided with a slot, and the sliding cover 213 is provided with a buckle. The buckle and the slot cooperate to restrict the sliding cover 213 from falling off.

[0213] like Figure 50 , 51As shown in Figure 62, the bimetallic assembly 71 is located along the side of the inner shell 22. The bimetallic assembly 71 includes a bimetallic strip 711, a heating element 712, an adjusting screw 713, and a limiting member 714. The fixed end of the bimetallic strip 711 is connected to the heating element 712 and is located near the operating end 11. The heating element 712 is connected to the second conductive plate 44. The driving end of the bimetallic strip 711 is near the traction rod 56. The driving end of the bimetallic strip 711 is provided with an adjusting screw 713, which is connected to the heating element 712 via the limiting member 714. In the event of an overload... When a fault occurs, the adjusting screw 713 pushes the opening driven part 561 of the traction rod 56, causing the opening force part 562 of the traction rod 56 to press the first unlocking part 551 in the latch assembly, thereby unlocking the latch structure. The rotating shaft 52 drives the moving contact 81 to rotate in the opening direction. The adjusting screw 713 is installed at the driving end of the bimetallic strip 711. The adjusting screw 713 is opposite to the communicating area 221 of the inner shell 22. The communicating area 221 of the inner shell 22 can be a hollow area or a through groove. The communicating area 221 corresponds to the adjusting port 212. Of course, the bimetallic assembly 71 can also omit the heating element 72 and directly fix the bimetallic strip 711 to the second conductive plate 44.

[0214] like Figure 2-4 As shown in Figures 7-9, one terminal 41 is connected to one busbar clamp 342 via a first conductive plate 43, forming a direct circuit. Another terminal 41 is electrically connected to another busbar clamp 342 via a second conductive plate 44, a contact mechanism, and a shunt 45. The second conductive plate 44 is connected to the terminal 41, and the shunt 45 is connected to the busbar clamp 342. The first conductive plate 43 and the second conductive plate 44 are respectively arranged along opposite sides of the outer shell 22. Preferably, the first conductive plate 43 and the second conductive plate 44 are respectively positioned on opposite sides of the inner shell 22 where a connecting area 221 is provided, thus avoiding the connecting area 221 and the adjustment port 212, facilitating the operation of the adjustment screw 713. Furthermore, the second circuit board 642 in the control assembly is preferably positioned on opposite sides of the inner shell 22 where the connecting area 221 is provided, to prevent the second circuit board 642 from obstructing the operation of the adjustment screw 713.

[0215] Furthermore, such as Figure 2-4As shown in Figures 41, 42, and 63-65, an electromagnetic component 72 is also provided in the inner shell 22. The electromagnetic component 72 and the bimetallic component 71 are located on the same side of the inner shell 22. That is, the bimetallic component 71 and the electromagnetic component 72 are arranged along the length of the circuit breaker. The electromagnetic component 72 typically includes a magnetic yoke 722, an armature 721, an armature reset member 724, and a conductive plate 720. The armature reset member 724 acts on the armature 721, so that the armature 721 and the magnetic yoke 722 are spaced apart to form a magnetic gap. The conductive plate 720 passes through the magnetic gap and is connected to a single-pole circuit. When a short-circuit current flows through the conductive plate 720, it can generate a magnetic field, causing the magnetic yoke 722 to attract the armature 721. The armature 721 triggers the locking assembly to rotate, thereby unlocking the latch structure of the operating mechanism 5.

[0216] Combination Figure 63 An electromagnetic assembly 72 is provided, comprising a magnetic yoke 722, an armature 721, an armature reset member 724, and a conductive plate 720. The armature 721 and the magnetic yoke 722 are spaced apart along the length of the circuit breaker, allowing the armature 721 to engage or disengage with the magnetic yoke 722 along the length of the circuit breaker. The magnetic yoke 722 is U-shaped. The conductive plate 720 is arranged along the length of the circuit breaker. One end of the conductive plate is electrically connected to a busbar clamp 342. The middle part of the conductive plate 720 is bent and passes through the middle of the magnetic yoke 722. The other end of the conductive plate extends along the length of the circuit breaker and is electrically connected to the stationary contact 82 of the contact mechanism.

[0217] Preferably, the side of the magnetic yoke 722 facing away from the armature 721 is also provided with a magnetizing plate, which increases the attraction force of the magnetic yoke 722 on the armature 721. Furthermore, the electromagnetic assembly 72 also includes an armature guide rod 727, which cooperates with the armature 721 to provide guidance. Specifically, one end of the armature guide rod 727 is fixedly connected to the armature 721, and the other end slides through the conductive plate 720, the magnetic yoke 722, and the magnetizing plate. The armature reset member 724 is a compression spring, which is sleeved on the armature guide rod 727 and its two ends cooperate with the armature 721 and the conductive plate, respectively.

[0218] Furthermore, the armature 721 includes at least two stacked armature 721 plates, which are spaced apart from the bottom wall of the magnetic yoke 722. One of the armature 721 plates is provided with a trigger arm 7211, which is bent and connected to the edge of the armature 721 plate. The trigger arm 7211 extends along the length of the circuit breaker and drives the latch assembly to separate from the latch 54, thereby unlocking the latch structure in the operating mechanism 5. The armature 721 is composed of at least two stacked armature 721 plates, which can reduce the forming cost of the trigger arm 7211 and facilitate processing.

[0219] Combination Figure 41 , 42Items 64 and 65 provide another structure for the electromagnetic component 72, which includes a bracket 726 and a conductive plate 720. The bracket 726 is generally U-shaped, and a support shaft 725 is provided between the two side walls of the bracket 726. An armature 721 is rotatably mounted on the support shaft 725. Preferably, the armature 721 is U-shaped, and its two side walls are rotatably connected to the support shaft 725. The top wall of the armature 721 is spaced apart from the bottom wall of the bracket 726. The armature 721 is provided with a trigger arm 7211, which is a bent rod structure formed by bending outward from the edge of the top wall of the armature 721. Preferably, the two side walls of the bracket 726 are also provided with limiting parts 7261 to limit the rotation angle of the armature 721. A magnetic yoke 722 is fixedly mounted inside the bracket 726. 722 and armature 721 are spaced apart and opposite each other along the length of the circuit breaker. The magnetic yoke 722 is preferably also U-shaped. The bottom wall of the magnetic yoke 722 is fixed to the bottom wall of the bracket 726. The two side walls of the magnetic yoke 722 are respectively attached to the two side walls of the bracket 726, so that the two side walls of the armature 721 and the two side walls of the magnetic yoke 722 are spaced apart and opposite each other. The conductive plate is arranged along the length of the circuit breaker. One end of the conductive plate is connected to the busbar clamp 342. The middle part of the conductive plate is bent and passes through the top wall of the armature 721 and the bottom wall of the magnetic yoke 722. The other end of the conductive plate is electrically connected to the stationary contact 82 of the contact mechanism along the length of the circuit breaker. The armature reset member 724 sleeved on the support shaft 725 is a torsion spring. The two elastic arms of the armature reset member 724 elastically abut against the top wall of the armature 721 and the bottom wall of the magnetic yoke 722, respectively. Of course, the electromagnetic component 72 can also be configured with a magnetizing element 723, which is fixedly mounted on the magnetic yoke 722. Preferably, the magnetizing element 723 is mounted on the bottom wall of the magnetic yoke 722. The magnetizing element can be one or two or more magnetizing elements stacked together.

[0220] like Figure 7 , 41As shown in Figure 42, the moving contact 81 is electrically connected to the second conductive plate 44. One end of the conductive plate 720 in the electromagnetic assembly 72 is connected to a busbar clamp 342 through a shunt 45. The shunt 45 is located outside the inner shell 22 and corresponds to the arc extinguishing system 9. The other end of the conductive plate 720 is electrically connected to the stationary contact 82 in the contact mechanism. Preferably, the conductive plate 720 can be part of the stationary contact 82. The shunt 45 and the conductive plate 720 are an integral structure. Further, one end of the conductive plate 720 forms a stationary contact plate 821. A stationary contact point is provided on the surface of the stationary contact plate 821, thereby forming the stationary contact 82. In this way, the stationary contact 82 and the shunt 45 are also an integral structure, reducing the number of parts, simplifying assembly, and reducing costs. Of course, the shunt 45 and the stationary contact 82 can also be separate structures, that is, the stationary contact 82 is connected to the conductive plate 720, and the conductive plate 720 is fixedly connected to the shunt 45. In addition, the conductive plate 720, the stationary contact 82 and the shunt 45 can be three separate components.

[0221] Combination Figures 40-42 A specific structure of a shunt 45 is provided. The shunt 45 includes two integrally bent conductor plates, which are perpendicularly connected to each other, making the shunt 45 L-shaped. This facilitates the shunt 45 to simultaneously fit against two adjacent outer side walls of the inner shell 22. The shunt 45 corresponds to the arc extinguishing system 9. For ease of description, the two conductor plates are a first conductor plate and a second conductor plate. The first conductor plate and the second conductor plate 44 are located on the same side outside the inner shell 22. The first conductor plate is connected to the adjacent busbar clamp 342. Preferably, the first conductor plate has a conductive part for connecting with the busbar clamp 342. The second conductor plate corresponds to the side of the inner shell 22 where the communicating region 221 is located.

[0222] like Figure 40 , 41 As shown, the shunt 45 and the stationary contact 82 are separate structures. The stationary contact 82 includes a stationary contact plate 821, which is a U-shaped body formed by integral bending, with its two ends spaced apart and facing each other. One end is provided with a stationary contact point, and the other end is fixedly connected to the shunt 45. That is, the other end of the stationary contact plate 821 is fixed to the outer side of the second conductor plate. The middle area of ​​the stationary contact plate 821 can serve as a conductive plate 720 in the electromagnetic assembly 72. In the figure, the edge of the first conductor plate is provided with a shunt wiring portion 451. Figure 40 , 41 In the middle, the shunt connection part 451 is located at the edge of the first conductor plate away from the bus clamp 342, and the shunt connection part 451 is adjacent to the stationary contact plate 821.

[0223] like Figure 42As shown, the shunt 45 and the stationary contact 82 can also be an integral structure. The second conductor plate extends along the length of the circuit breaker to form a strip-shaped conductive plate 720. The conductive plate 720 is bent and extends into the inner shell 22. The end of the conductive plate 720 is bent and extends along the length of the circuit breaker to form a stationary contact plate 821. The stationary contact plate 821 is provided with stationary contact points to form the stationary contact 82. In this case, it can be understood that the conductive plate 720 is part of the stationary contact 82. A shunt wiring portion 451 is provided at the edge of the shunt 45. The shunt wiring portion 451 is preferably located on the first conductor plate. The shunt wiring portion 451 is located at the edge of the first conductor plate away from the second conductor plate.

[0224] In this embodiment, as Figure 2-4 As shown in Figure 66, the arc extinguishing system 9 includes an arc extinguishing chamber 91, which is provided with multiple arc extinguishing grids arranged at intervals. The arc inlet of the arc extinguishing chamber 91 is connected to the contact mechanism, wherein the stationary contact 82 and the moving contact 81 are located on opposite sides of the arc inlet at intervals. The arc extinguishing system 9 also includes a moving arc ignition angle 921 and a stationary arc ignition angle 922 that are spaced apart and opposite to each other. The moving arc ignition angle 921 corresponds to the opening position of the moving contact 81, and the moving arc ignition angle 921 is divided into inner and outer sides corresponding to the same side wall of the inner shell 22. One end of the moving contact 81 is parallel to the end of the moving contact 81 when the circuit is open, and the other end extends from the arc inlet to the arc-extinguishing chamber 91 and is parallel to the arc-extinguishing grid plate located on the side. When the circuit is open, the moving contact 81 can abut against the moving arc-starting angle 921. One end of the stationary arc-starting angle 922 is welded to the stationary contact 82, and the other end of the stationary arc-starting angle 922 extends from the arc inlet to the arc-extinguishing chamber 91 and is parallel to an arc-extinguishing grid plate located on the side. It can also be understood that multiple arc-extinguishing grid plates are arranged at intervals between the stationary arc-starting angle 922 and the moving arc-starting angle 921.

[0225] Furthermore, such as Figure 60As shown, the moving arc angle 921 is also connected to an equipotential bonding element, which can be a wire or a conductive shaft 923. Preferably, the moving arc angle 921 and the second circuit board 642 are connected by a conductive shaft 923 as an equipotential bonding element. When the contact mechanism is open, the moving arc angle 921 and the moving contact 81 are connected to the same potential through the conductive shaft 923. Specifically, the side wall of the inner shell 22 is provided with a through hole, and the moving arc angle 921 is connected to a conductive shaft 923. The conductive shaft 923 passes through the through hole and is inserted into the conductive socket of the second circuit board 642. The moving arc-starting angle 921, the conductive shaft 923, the second circuit board 642, and the second conductive plate 44 form a connecting circuit. When the moving contact 81 is in the open position and abuts against the moving arc-starting angle 921, the connecting circuit achieves the equipotentiality of the moving contact 81 arc-starting angle and the moving contact 81. The stationary contact 82 arc-starting angle is welded to the stationary contact 82, thus achieving the same potential as the stationary contact 82. When the moving and stationary contacts 82 separate, it is beneficial for the arc to quickly transfer to the moving arc-starting angle 921 and the stationary arc-starting angle 922, resulting in a good arc-starting effect, effectively protecting the moving and stationary contacts, and improving the breaking capacity.

[0226] like Figure 60 As shown, the conductive shaft 923 includes a shaft body, which is stepped in shape with thinner ends and thicker middle. The two ends of the shaft body are connected to the second circuit board 642 and the moving arc angle 921, respectively. The middle part of the shaft body passes through the side wall of the inner shell 22 and is supported on the inner shell 22 by the middle part of the shaft body.

[0227] Furthermore, the arc-extinguishing system 9 also includes an arc-blocking plate, which is assembled in the inner shell 22. An exhaust space 924, facilitating exhaust, exists between the arc-extinguishing chamber 91 and the arc-blocking plate. Preferably, as shown in the figure... Figure 3 , 4 As shown, the exhaust space 924 has varying widths, which facilitates exhaust; simultaneously, an arc-trapping channel 925 is formed between the arc-blocking plate and the inner shell 22, which facilitates arc suppression. Furthermore, in this embodiment, as... Figure 12 As shown, the inner shell 22 forms an installation chamber 222 in the area corresponding to the arc extinguishing system 9. The arc extinguishing system 9 is installed in the installation chamber 222, which can improve the airtightness of the space and help to increase the arc pressure.

[0228] 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. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0229] 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 circuit breaker, comprising a housing (21), wherein the two opposite ends of the housing (21) are an operating end (11) and a plug-in end (12), and a locking hole (211) is provided on the side wall of the housing (21) connected between the operating end (11) and the plug-in end (12), and the locking hole (211) is close to the operating end (11), wherein the operating end (11) is equipped with a button assembly (31), the button assembly (31) including an operating member (311), wherein pressing or pulling the operating member (311) along the line connecting the operating end (11) and the plug-in end (12) causes the operating member (311) to switch sequentially between a closed position, an open position, or a pull-out unlocking position. characterized in that The outer casing (21) is further provided with a protective mechanism (32), which includes a locking member (321) and a locking elastic member (322). The locking member (321) is located between the operating member (311) and the locking hole (211). The locking elastic member (322) provides a driving force to the locking member (321), causing the locking part (3211) of the locking member (321) to extend out of the locking hole (211). An abutment part (310) is also provided between the operating member (311) and the locking member (321). Pressing or pulling the operating member (311) switches the engagement position of the abutment part (310) and the locking member (321). When the operating member (311) is in the closed position, the locking member (321) is pressed against the abutment part (310), so that the locking part (3211) located outside the locking hole (211) cannot be pushed into the outer casing (21). When the operating element (311) is in the open position, at least a portion of the locking part (3211) can be pushed into the housing (21). When the operating element (311) is in the pull-unlock position, the locking part (3211) is driven by the operating element (311) to retract into the housing (21).

2. The circuit breaker of claim 1, wherein: The abutment (310) is a protrusion provided on the side wall of the operating member (311) and / or the abutment (310) is a boss on the side of the locking member (321) opposite to the locking part (3211).

3. The circuit breaker according to claim 2, characterized in that: The abutment (310) is located on the side of the locking member (321) opposite to the locking part (3211). Before the circuit breaker is assembled, the abutment (310) stops the closing action of the operating member (311).

4. The circuit breaker according to claim 3, characterized in that: The locking member (321) is driven by the locking elastic member (322) to perform linear telescopic movement. The locking member (321) is also provided with a force-receiving part (3212) on the side facing the locking hole (211). The protective mechanism (32) also includes a pressing member (323), which moves linearly with the operating member (311). The pressing member (323) is provided with a pressing part (3231). When the operating member (311) is in the closed or open position, the pressing part (3231) separates from the force-receiving part (3212), so that the locking part (3211) is outside the locking hole (211). When the operating member (311) is in the pull-unlock position, the pressing part (3231) presses the force receiving part (3212), causing the locking member (321) to be driven to move closer to the operating member (311).

5. The circuit breaker according to claim 4, characterized in that: The pressing member (323) is located between the locking member (321) and the locking hole (211). The pressing member (323) is also provided with a clearance space (3232). When the operating member (311) is in the closed or open position, the force-bearing part (3212) is located in the clearance space (3232). When the operating member (311) is in the pull-unlock position, the abutting part (310) drives the locking member (321) so that the force-bearing part (3212) is located outside the clearance space (3232) and cooperates with the pressing part (3231).

6. The circuit breaker according to claim 4, characterized in that: The locking member (321) is provided with two force-receiving parts (3212), which are symmetrically distributed on both sides of the locking part (3211). The pressing member (323) is provided with two pressing parts (3231), and a clearance groove (3233) is provided between the two pressing parts (3231) for avoiding the locking part (3211).

7. The circuit breaker according to claim 4, characterized in that: The locking elastic member (322) includes at least one twisted portion, which is rotatably mounted between the operating member (311) and the locking hole (211). The first elastic arm of the twisted portion elastically abuts against the inner sidewall of the housing (21), and the second elastic arm of the twisted portion abuts against the locking member (321) to keep the locking portion (3211) protruding out of the locking hole (211).

8. The circuit breaker according to claim 4, characterized in that: The operating member (311) is provided with a driving boss (3112), and the pressing member (323) is provided with a driven boss (3236). When the operating member (311) is pulled to the pull-unlock position, the driving boss (3112) and the driven boss (3236) cooperate to drive the pressing member (323) to move.

9. The circuit breaker according to claim 4, characterized in that: The protective mechanism (32) further includes a pressing reset member (324), which is located between the pressing member (323) and the inner wall of the outer shell (21), and the pressing reset member (324) provides a reset force for the pressing member (323).

10. The circuit breaker according to any one of claims 4-9, characterized in that: The locking member (321) includes a plate-shaped body, with rectangular bosses at both ends. A locking portion (3211) protrudes from the plate-shaped body between two rectangular bosses. A force-bearing portion (3212) is formed between the locking portion (3211) and an adjacent rectangular boss. Each rectangular boss has an elastic drive groove (3215) on its side facing away from the locking portion (3211). The plate-shaped body has a boss serving as an abutment (310) on its side facing away from the locking portion (3211). The locking elastic element (322) includes two twisted portions. The first elastic arms of the two twisted portions extend towards each other and are connected together for elastic abutment against the inner wall of the housing (21). The second elastic arm of each twisted portion passes through an elastic drive groove (3215) respectively, and the end of each second elastic arm is bent to form an anti-disengagement portion. The pressing member (323) includes a plate-shaped body, with a driven boss (3236) and a pressing part (3231) protruding from both ends of the plate-shaped body, respectively. The driven boss (3236) cooperates with a driving boss (3112) protruding from the operating member (311). A cylindrical shaft (3234) is provided on both sides of the driven boss (3236), and each of the twisted parts is rotatably assembled on the cylindrical shaft (3234). A positioning shaft (3235) is provided on the side of the driven boss (3236) opposite to the pressing part (3231). (3235) A pressing and resetting member (324) is provided between the inner wall of the outer shell (21). A recessed area as a clearance space (3232) is provided between the pressing part (3231) and the driven boss (3236). A clearance groove (3233) is provided at one end of the plate-shaped body with the pressing part (3231). The clearance groove (3233) has an opening at one end away from the driven boss (3236) so that the pressing part (3231) is divided into two parts. The locking part (3211) moves in the clearance groove (3233).

11. The circuit breaker according to claim 2, characterized in that: The abutment portion (310) is fixed to the side wall of the operating member (311), and the locking member (321) is rotatably assembled between the operating member (311) and the locking hole (211). The locking member (321) has a force-bearing portion (3212) and a clearance space (3214) on the side opposite to the locking portion (3211), and the force-bearing portion (3212) is located at the end away from the locking portion (3211). When the operating member (311) is in the closed position, the abutting part (310) abuts against the side of the locking member (321) opposite to the locking part (3211), so that the locking part (3211) cannot be pushed into the outer casing (21). When the locking member (321) is in the open position, the abutting part (310) is within the clearance space (3214) and can slide towards the force-receiving part (3212), so that the locking part (3211) can be pushed into the outer casing (21). When the locking member (321) is in the pull-out unlock position, the abutment part (310) cooperates with the force-receiving part (3212) to make the locking member (321) rotate in the direction of retracting into the outer shell (21).

12. The circuit breaker according to claim 11, characterized in that: The sidewall of the operating member (311) protrudes to form a boss that serves as the abutment portion (310), the abutment portion (310) including a first abutment surface and a second abutment surface. When the operating member (311) is in the closed position, the first abutting surface abuts against the side of the locking member (321) opposite to the locking part (3211), preventing the locking part (3211) from being pushed into the outer casing (21). When the operating member (311) is in the open position, the first abutment surface slides into the clearance space (3214), allowing the locking part (3211) to be pushed into the outer casing (21). When the operating member (311) is in the pull-unlock position, the second abutment surface cooperates with the force-receiving part (3212) to drive the locking member (321) to rotate.

13. The circuit breaker according to claim 11, characterized in that: The side wall of the operating member (311) is provided with a pair of fixed bosses, and a protrusion is assembled between the pair of fixed bosses. A portion of one side of the protrusion extends out to form an abutment (310).

14. The circuit breaker according to any one of claims 11-13, characterized in that: The locking member (321) includes a rod-shaped body, one end of which is provided with a connecting shaft, and the other end of which protrudes to form a rectangular boss as a locking part (3211). The rod-shaped body on the side opposite to the locking part (3211) forms an arc-shaped concave surface as a clearance space (3214). The rod-shaped body protrudes to provide a force-bearing part (3212), which is located on the side opposite to the locking part (3211) and is close to the connecting shaft and connected to the clearance space (3214). The rod-shaped body also provides an elastic abutment part.

15. The circuit breaker according to claim 14, characterized in that: The locking elastic element (322) includes a twisted portion, which is sleeved on the connecting shaft. One elastic arm of the twisted portion elastically abuts against the inner wall of the outer casing (21), and the other elastic arm of the twisted portion elastically abuts against the elastic abutting portion.

Images