Circuit breaker

Abstract

The invention discloses a circuit breaker, and relates to the technical field of low-voltage electrical appliances, and the circuit breaker comprises a housing, an operation mechanism, a contact assembly, and an arc isolation module. The operating mechanism is installed on the shell, and a contact support of the operating mechanism is rotationally connected to the inner wall of the shell. The contact assembly comprises a moving contact and a static contact, the moving contact is rotationally connected to the shell, the moving contact is movably connected with the contact support, and the rotating central axis of the moving contact and the rotating central axis of the contact support are arranged at intervals, so that the opening distance between the moving contact and the static contact is increased. The arc isolation module is installed on the shell, the arc isolation module can isolate electric arcs generated in the breaking process of the circuit breaker, the arc isolation module is provided with an arc isolation cavity, a static contact point of the static contact is located in the arc isolation cavity, and a moving track of a moving contact point in the moving contact is located in the arc isolation cavity. According to the invention, the breaking performance and the arc extinguishing performance of the circuit breaker are higher.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Art

[0002] Among traditional switching devices, circuit breakers are usually designed to control and protect electrical circuits. Circuit breakers can connect and disconnect circuits under normal conditions to meet daily power needs. At the same time, in the event of a fault or abnormal situation, circuit breakers can quickly cut off the current to prevent equipment damage and ensure personnel safety.

[0003] However, existing circuit breakers have some problems, such as the low breaking capacity of the entire circuit breaker and the inability to provide sufficient safety. Summary of the invention

[0004] The present application provides a circuit breaker, which can improve the breaking performance and arc extinguishing performance of the circuit breaker. After modularizing the partial structure, the structure of the entire circuit breaker is more stable, the number of parts is reduced, and the assembly is simpler.

[0005] The present application provides a circuit breaker, which includes a housing, an operating mechanism, a contact assembly and an arc isolation module.

[0006] The operating mechanism is installed on the shell, and the contact support of the operating mechanism is rotatably connected to the inner wall of the shell.

[0007] The contact assembly includes a moving contact and a stationary contact, wherein the moving contact is rotatably connected to the housing and movably connected to a contact support, wherein a rotation center axis of the moving contact and a rotation center axis of the contact support are spaced apart to increase the opening distance between the moving contact and the stationary contact.

[0008] The arc isolation module is installed in the shell. The arc isolation module can isolate the arc generated during the circuit breaker breaking process. The arc isolation module has an arc isolation cavity. The static contact of the static contact is in the arc isolation cavity, and the moving track of the moving contact in the moving contact is in the arc isolation cavity.

[0009] The circuit breaker described above in the present application includes a housing, an operating mechanism, a contact assembly, and an arc-isolating module. Through the coordinated operation of these components, the breaking capacity of the circuit breaker can be significantly improved, and its arc-extinguishing effect can be enhanced, thereby ensuring the safe operation of the circuit.

[0010] Specifically, the operating mechanism is installed inside the housing of the circuit breaker. The contact support of the operating mechanism is fixed to the inner wall of the housing by a rotating connection. This design enables the operating mechanism to operate flexibly, thereby effectively coordinating the on and off of the control contact assembly.

[0011] The contact assembly is the main functional part of the circuit breaker, including the moving contact and the stationary contact. The moving contact is mounted on the housing by a rotating connection, and the moving contact is movably connected to the contact support part of the operating mechanism. In order to increase the opening distance between the moving contact and the stationary contact, the rotation center axis of the moving contact is spaced from the rotation center axis of the contact support. This design enables the moving contact to maintain a larger opening distance during the opening and closing process, thereby improving the breaking capacity of the circuit breaker.

[0012] The arc isolation module is installed at a specific position of the housing. Its main function is to isolate and suppress the arc generated by the circuit breaker during the breaking process. The arc isolation module can enclose an arc isolation cavity, and the moving tracks of the static contact of the static contact and the moving contact of the moving contact are located in the arc isolation cavity. This design ensures that the static contact and the moving contact are always in the arc isolation cavity during the breaking process, thereby effectively improving the arc extinguishing effect and ensuring the safety and stability of the circuit.

[0013] In some examples, the arc isolation module includes an integrally formed first arc isolation plate, a connecting portion, and a second arc isolation plate, which enclose and form an arc isolation cavity. A pressure balance channel is provided on the outer peripheral side of the arc isolation module, and the pressure balance channel is connected to the arc extinguishing chamber.

[0014] Based on the above example, the arc-isolating chamber is used to confine the arc in it to prevent the arc from damaging other components. The pressure balance channel can achieve pressure balance in the arc-extinguishing chamber, thereby further reducing the pressure inside the arc-extinguishing chamber and the corresponding switch device product.

[0015] In some examples, the circuit breaker further includes a fast closing module, which includes a locking member and an energy storage member, wherein the locking member is movably connected to the housing and can lock the moving contact, and the energy storage member is disposed between the moving contact and the contact support.

[0016] When the circuit breaker is initially closed, the locking piece first locks the moving contact, the contact support moves relative to the moving contact and causes the energy storage piece to store energy. As the circuit breaker continues to close, the locking piece unlocks the moving contact, the energy storage piece is released and drives the moving contact to close quickly.

[0017] Based on the above examples of the present application, the circuit breaker is also specially provided with a fast closing module. The main function of the fast closing module is to realize the fast closing action of the contact assembly. The fast closing module may include a locking member and an energy storage member. The locking member is movably connected to the housing of the circuit breaker and has the function of locking the moving contact. The energy storage member is arranged between the moving contact and the contact support for storing energy.

[0018] When the circuit breaker performs the initial closing operation, the locking piece will first lock the moving contact to ensure that it remains stable during the closing process. At the same time, the contact support and the moving contact move relative to each other, allowing the energy storage piece to store energy. For example, the energy storage piece is an elastic piece that stores elastic potential energy by compression or stretching. As the circuit breaker continues to close, the locking piece will unlock the moving contact in a timely manner to release the previously stored energy (such as elastic potential energy, etc.). This release process will drive the moving contact to close quickly, thereby greatly shortening the closing time, improving the closing effect of the circuit breaker, making the closing efficiency higher, reducing the electro-erosion loss between the moving contact and the static contact in the contact assembly, and increasing the service life of the contact assembly.

[0019] In some examples, the locking member includes a rotational connection portion, a first connection arm, a second connection arm, and an elastic portion.

[0020] The rotating connection part is rotatably connected to the housing. The first connecting arm: The first end of the first connecting arm is connected to the rotating connection part, and the second end of the first connecting arm is provided with a first buckle, and the first buckle can be clamped to the moving contact. The second connecting arm: The first end of the second connecting arm is connected to the rotating connection part, and the second end of the second connecting arm is provided with a second buckle, and the second buckle can be clamped to the handle module. The first buckle can be released during the rotation of the handle module, and the extension direction of the second connecting arm is set at an angle to the extension direction of the first connecting arm.

[0021] The first end of the elastic part is connected to one end of the second connecting arm away from the rotating connecting part. A receiving edge is arranged on the inner side of the shell. The second end of the elastic part abuts against the receiving edge and is in a pre-tightened state. The elastic part can maintain the first clip and the moving contact in a clamped state through elastic pre-tightening force.

[0022] During the closing process of the contact assembly, the handle module drives the contact support to move relative to the moving contact, the energy storage component stores energy, the first clip and the moving contact remain in a clipped state, and the handle module continues to move. The handle module overcomes the elastic preload force through the second clip and releases the first clip. The energy storage component between the moving contact and the contact support is released and drives the moving contact to snap together quickly.

[0023] Based on the above example, the rotating connection part can be rotatably connected to the housing of the circuit breaker. The rotating connection part is the hub of the entire fast closing module, ensuring that various components can operate in coordination.

[0024] The first end of the first connecting arm is connected to the rotating connecting part. The second end of the first connecting arm is provided with a first buckle. The function of the first buckle is to be able to be engaged with the moving contact. The moving contact is movably connected to the contact support, and an energy storage component is provided between the moving contact and the contact support. The function of the energy storage component is to store energy during the closing process so that it can be quickly released when needed to achieve rapid closing.

[0025] The first end of the second connecting arm is also connected to the rotating connecting part. The second end of the second connecting arm is provided with a second buckle. The second buckle can be engaged with the handle module. The handle module can release the first buckle during the rotation process, so that the entire closing action can be carried out smoothly. The extension direction of the second connecting arm is set at a certain angle to the extension direction of the first connecting arm. Such a design helps to achieve a more accurate and efficient closing action.

[0026] The first end of the elastic part is connected to an end of the second connecting arm away from the rotating connecting part. A receiving edge is provided on the inner side of the housing, and the second end of the elastic part abuts against the receiving edge, and the initial state of the elastic part is in a pre-tightened state. At this time, the elastic part keeps the first buckle and the contact support position in a clamped state through the elastic pre-tightening force, ensuring that the first buckle and the moving contact can maintain a stable connection during the closing process.

[0027] During the closing process of the contact assembly of the circuit breaker, the handle module drives the contact support to move relative to the moving contact. During this process, the energy storage component starts to store energy. The first buckle and the moving contact remain in the clamping state, and the handle module continues to move. The handle module overcomes the elastic preload through the second buckle and releases the first buckle. At this time, the energy storage component between the moving contact and the contact support releases energy, driving the moving contact to snap together quickly, thereby achieving the purpose of rapid closing.

[0028] In some examples, the circuit breaker further includes an exhaust assembly, which is used to exhaust gas generated during arc extinction in the circuit breaker, and the exhaust assembly includes a first exhaust channel, a second exhaust channel, and a pressure balance channel:

[0029] The first exhaust channel is connected to the exhaust side of the arc extinguishing chamber. At least one partition is arranged in the shell. The partition and the inner wall of the shell enclose the first exhaust channel. At least one exhaust outlet matched with the first exhaust channel is opened on the shell.

[0030] The second exhaust channel is arranged between the wiring terminal and the inner wall of the shell, the first end of the second exhaust channel is connected to the exhaust side of the arc extinguishing chamber, and the second end of the second exhaust channel is connected to the wiring hole corresponding to the wiring terminal.

[0031] The pressure balance channel is arranged on the arc striking side of the arc extinguishing chamber. The arc striking side of the arc extinguishing chamber is provided with an arc running track surrounded by two arc isolation plates. The pressure balance channel is arranged at intervals from the arc running track through the arc isolation plates and is connected to the arc extinguishing chamber.

[0032] The above three channels can break the arc pressure (gas pressure generated during the arc running process), which helps to reduce the internal pressure of the arc extinguishing chamber and the corresponding switch device products through multi-channel pressure relief, reducing or even eliminating the structural damage to the housing and parts caused by high-pressure gas or arc.

[0033] Specifically, the first exhaust channel is directly connected to the exhaust side of the arc extinguishing chamber. In order to form this channel, one or more partitions are specially arranged inside the shell. These partitions and the inner wall of the shell together enclose the space of the first exhaust channel. In addition, at least one exhaust outlet adapted to the first exhaust channel is provided on the shell to facilitate the smooth discharge of gas.

[0034] The second exhaust channel is cleverly arranged between the terminal and the inner wall of the housing. The first end of this channel is connected to the exhaust side of the arc extinguishing chamber, and the second end is connected to the wiring hole corresponding to the terminal. This design ensures that when an arc is generated, the gas can be discharged smoothly through this channel, thereby reducing the internal pressure.

[0035] The pressure balance channel is set on the arc-initiating side of the arc-extinguishing chamber. On the arc-initiating side of the arc-extinguishing chamber, two arc-isolating plates are used to form an arc-running track. The pressure balance channel is separated from the arc-running track by the arc-isolating plates and is connected to the inside of the arc-extinguishing chamber. This design helps to achieve pressure balance through the pressure balance channel when an arc is generated, thereby further reducing the pressure inside the arc-extinguishing chamber and the corresponding switch device products.

[0036] In some examples, the circuit breaker further includes an arc striking assembly, which is used to guide the arc generated during the circuit breaker breaking process, and the arc striking assembly includes an arc path arc striking plate and an arc extinguishing chamber arc striking plate.

[0037] The first end of the arc striking plate is connected to a double-metal connecting plate, the double-metal connecting plate is connected to the inner wall of the shell, the arc striking plate of the arc extinguishing chamber is arranged at the second end of the arc striking plate, and a magnetic conductive structure is arranged on the arc striking plate.

[0038] The double metal connecting plate, the arc path arc starting plate, the arc extinguishing chamber arc starting plate and the magnetic conductive structure are an integrated structure.

[0039] Based on the above examples, the circuit breaker of the present application is also provided with an arc striking assembly. The main function of the arc striking assembly is to guide and control the arc generated by the circuit breaker during the breaking process to ensure that the arc can be handled safely and effectively. The arc striking assembly mainly includes two key parts: an arc striking plate for the arc path and an arc striking plate for the arc extinguishing chamber.

[0040] Specifically, one end of the arc-starting plate is connected to a bimetallic connecting plate. The bimetallic connecting plate can more firmly fix the arc-starting plate to the inner wall of the circuit breaker housing, ensuring that it can stably play an arc-starting role when an arc is generated. The other end of the arc-starting plate is provided with an arc-extinguishing chamber arc-starting plate, which is located at the end of the arc-starting plate, further guiding the arc into the arc-extinguishing chamber, thereby achieving effective arc extinguishing.

[0041] In some examples, the circuit breaker further includes a handle module, the handle module is connected to the operating mechanism, the handle module can drive the operating mechanism to move, and the handle module includes a handle body and an elastic member.

[0042] The handle body comprises a mounting portion, a first clamping portion and a second clamping portion. The elastic member is connected to the mounting portion, the first force arm of the elastic member is connected to the first clamping portion, and the second force arm of the elastic member is connected to the second clamping portion.

[0043] The elastic member can be pre-installed to the handle body and form a pre-installed module, at least one of the first force arm and the second force arm extends to the outside of the handle body, and the extended portion can abut against the inner wall of the shell.

[0044] A connecting hole is provided on the handle body, and a transmission rod connected to the contact support is installed on the connecting hole. During the closing process of the circuit breaker, the handle body can drive the contact support to move through the transmission rod.

[0045] The handle body may include three parts, namely: a mounting portion, a first clamping portion, and a second clamping portion. The elastic member is connected to the mounting portion to ensure its stability and reliability. The two force arms of the elastic member are respectively connected to the first clamping portion and the second clamping portion, so that the design can provide the necessary elasticity and strength during the operation of the handle module.

[0046] The elastic member can be pre-assembled into the handle body to form a pre-installed module. The advantage of this design is that at least one of the two force arms of the elastic member will extend to the outside of the handle body, and the design of the extension portion enables the first force arm and the second force arm to contact the corresponding inner wall of the shell. When the handle is operated, the force arm of the elastic member will come into contact with the inner wall of the shell, thereby generating a certain reaction force, so that the handle has a certain elasticity and feedback during operation. Such a design not only improves the comfort of operation, but also enhances the stability and reliability of the circuit breaker. Since the elastic member is pre-installed on the handle body, a part that shakes randomly is reduced, the assembly accuracy is improved, and the assembly difficulty of the circuit breaker is reduced.

[0047] In some examples, the circuit breaker further includes an electromagnetic trip module, which is mounted on the housing and can cooperate with the operating mechanism to trip the circuit breaker.

[0048] The electromagnetic trip module comprises a trip assembly and a current-carrying part. The trip assembly and the current-carrying part are fixedly connected or integrally arranged to form an independent module. The static contact in the contact assembly is arranged on the current-carrying part.

[0049] The electromagnetic trip module is installed inside the housing, and the electromagnetic trip module includes a trip assembly and a current-carrying member. The trip assembly and the current-carrying member are fixedly connected or integrally arranged to form an independent module. The second end of the current-carrying member is provided with a static contact and an arc-starting angle connected to the static contact, so that during the operation of the circuit breaker, the current can be transmitted through the current-carrying member. The static contact is arranged on the current-carrying member, corresponding to the moving contact in the contact assembly.

[0050] The modular design of the present application makes the structure of the entire circuit breaker more stable, reduces the number of parts, and simplifies the assembly process. This design not only improves production efficiency, but also reduces manufacturing costs, while ensuring the reliability and safety of the circuit breaker in actual use. The cooperation of the handle module, operating mechanism, contact assembly, electromagnetic trip module and arc isolation module in the above structure can form a circuit breaker with higher breaking performance and arc extinguishing performance, further improving the safety and reliability of the circuit breaker.

[0051] In some examples, the trip assembly is riveted to the current-carrying component and forms an independent module.

[0052] Alternatively, at least one of the yoke or the bracket in the trip assembly is integrally arranged with the current-carrying component to form an independent module.

[0053] The above two methods can both form an independent electromagnetic tripping module, and the appropriate setting method can be selected according to specific needs.

[0054] The trip assembly and the current-carrying part of the present application can be connected together by riveting and together form an independent module. This method makes the trip assembly and the current-carrying part structurally integrated, which is convenient for installation and maintenance.

[0055] In the trip assembly, at least one part of the yoke or the bracket can be designed to be integrated with the current-carrying component. This design allows the yoke or the bracket to be combined with the current-carrying component during the manufacturing process to form an independent module. This design is also convenient for overall installation and maintenance.

[0056] The two methods mentioned above, whether through riveting or integrated design, can effectively form an independent electromagnetic release module. The specific method can be determined according to the actual application requirements and production conditions. Different design choices may bring different manufacturing costs, installation convenience and maintenance efficiency. Therefore, various factors need to be considered comprehensively in actual applications to ensure the performance and reliability of the final product.

[0057] In some examples, a first end of the current-carrying member is connected to a wiring terminal, a second end of the current-carrying member is provided with a stationary contact, and an arc-starting angle is provided on the stationary contact.

[0058] The part of the current-carrying part between the wiring terminal and the static contact is arranged obliquely, and the tripping assembly is arranged obliquely in the middle part of the current-carrying part.

[0059] Based on the above example, the first end of the current-carrying member in the present application is connected to the circuit by connecting the wiring terminal, and the second end of the current-carrying member is provided with a static contact. An arc-starting angle is connected to the static contact so that the arc can be effectively guided when the current is interrupted, thereby protecting the contact from damage. The portion of the current-carrying member between the connecting terminal and the static contact is not horizontal, but is arranged in an inclined manner, and such a design helps to improve the tripping efficiency of the tripping assembly.

[0060] The trip assembly is designed to be tilted in the middle of the current-carrying part. This tilted layout allows the range of the yoke to be expanded. Specifically, within the same width space, by tilting the trip assembly, the yoke can be set longer. This design allows the yoke to generate a larger electromagnetic field, thereby generating a stronger electromagnetic force. This yoke with a stronger electromagnetic force can work more quickly with the traction armature, thereby significantly improving the response speed and breaking capacity of the circuit breaker, ensuring that the circuit can be quickly disconnected under abnormal conditions, and ensuring the safe operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the examples or prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0062] Figure 1 This is a schematic diagram of the structure of a circuit breaker in an example of the present application.

[0063] Figure 2 It is a schematic diagram of the structural explosion of a circuit breaker in an example of the present application.

[0064] Figure 3 A structural schematic diagram of an electromagnetic trip module in a circuit breaker in an example of the present application.

[0065] Figure 4 Another structural schematic diagram of an electromagnetic trip module in a circuit breaker in an example of the present application.

[0066] Figure 5 This is a schematic diagram of the structure of the assembled arc isolation module in a circuit breaker in an example of the present application.

[0067] Figure 6 This is a schematic diagram of the structure of the arc isolation module in a circuit breaker after injection molding in an example of the present application.

[0068] Figure 7 This is a schematic diagram of the structure of the housing and the fast closing module in a circuit breaker in an example of the present application when they cooperate.

[0069] Figure 8 This is a schematic diagram of the structure of a fast closing module in a circuit breaker in an example of the present application.

[0070] Fig. 9 This is a schematic diagram of the structure of an arc striking assembly in a circuit breaker in an example of the present application.

[0071] Fig.10 It is another exploded schematic diagram of the structure of a circuit breaker in an example of the present application.

[0072] Reference numerals:

[0073] 100. Shell;

[0074] 200, electromagnetic release module; 210, release assembly; 211, bracket; 212, yoke; 213, fixed shaft; 214, torsion spring; 215, armature; 216, snap-fit ​​part; 220, current-carrying part; 230, terminal; 240, static contact; 250, arcing angle;

[0075] 300, arc isolation module; 310, first arc isolation plate; 320, connecting portion; 330, second arc isolation plate; 340, arc isolation cavity; 350, containing groove; 360, scale mark;

[0076] 400, double gold module; 410, double gold main body; 420, double gold connecting plate;

[0077] 500, handle module; 510, handle body; 520, elastic member;

[0078] 600, fast closing module; 610, rotating connection part; 620, first connection arm; 621, first buckle; 630, second connection arm; 631, second buckle; 640, elastic part;

[0079] 700, arc striking assembly; 710, arc striking plate of arc path; 720, arc striking plate of arc extinguishing chamber;

[0080] 800, exhaust assembly; 810, first exhaust channel; 820, second exhaust channel; 830, pressure balance channel;

[0081] 900. Arc extinguishing chamber. DETAILED DESCRIPTION

[0082] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0083] To solve the above technical problems, please refer to Figure 1-Figure 10 As shown, the first aspect of the present application proposes a circuit breaker, which can improve the breaking performance and arc extinguishing performance of the circuit breaker. After modularizing the partial structure, the structure of the entire circuit breaker is more stable, the number of parts is reduced, and the assembly is simpler.

[0084] Reference Figure 1 and Figure 2 In some examples, the circuit breaker includes a housing 100 , an operating mechanism, a contact assembly, and an arc isolation module 300 . The operating mechanism is mounted on the housing 100 , and the contact support of the operating mechanism is rotatably connected to the inner wall of the housing 100 .

[0085] The contact assembly includes a moving contact (not shown in the figure) and a stationary contact 240. The moving contact is rotatably connected to the housing 100 and is movably connected to a contact support. The rotation center axis of the moving contact and the rotation center axis of the contact support are spaced apart to increase the opening distance between the moving contact and the stationary contact 240.

[0086] The arc isolation module 300 is installed on the shell 100. The arc isolation module 300 can isolate the arc generated during the circuit breaker breaking process. The arc isolation module 300 has an arc isolation cavity 340. The static contact of the static contact 240 is located in the arc isolation cavity 340, and the moving trajectory of the moving contact in the moving contact is located in the arc isolation cavity 340.

[0087] The circuit breaker described above in the present application includes a housing, an operating mechanism, a contact assembly, and an arc isolation module 300. Through the coordinated work of these components, the breaking capacity of the circuit breaker can be significantly improved, and its arc extinguishing effect can be enhanced, thereby ensuring the safe operation of the circuit.

[0088] Specifically, the operating mechanism is installed inside the housing of the circuit breaker. The contact support of the operating mechanism is fixed to the inner wall of the housing 100 by a rotational connection. This design enables the operating mechanism to be operated flexibly, thereby effectively coordinating the on and off of the control contact assembly.

[0089] The contact assembly is the main functional part of the circuit breaker, including a moving contact and a stationary contact 240. The moving contact is mounted on the housing 100 by a rotating connection, and the moving contact is movably connected to the contact support part of the operating mechanism. In order to increase the opening distance between the moving contact and the stationary contact 240, the rotation center axis of the moving contact is spaced from the rotation center axis of the contact support. This design enables the moving contact to maintain a larger opening distance during the opening and closing process, thereby improving the breaking capacity of the circuit breaker.

[0090] The arc isolation module 300 is installed at a specific position of the housing 100, and its main function is to isolate and suppress the arc generated by the circuit breaker during the breaking process. The arc isolation module 300 can enclose an arc isolation cavity 340, and the moving tracks of the static contact of the static contact 240 and the moving contact of the moving contact are located in the arc isolation cavity 340. This design ensures that the static contact and the moving contact are always in the arc isolation cavity 340 during the breaking process, thereby effectively improving the arc extinguishing effect and ensuring the safety and stability of the circuit.

[0091] In summary, through the combination of the housing, the operating mechanism, the contact assembly and the arc isolation module 300, the circuit breaker not only has a stronger breaking capacity, but can also effectively suppress the arc, thereby ensuring the safe operation of the circuit under various working conditions.

[0092] Reference Figure 3 and Figure 4 In some examples, the circuit breaker further includes an electromagnetic trip module 200 , which is mounted on the housing 100 , and the electromagnetic trip module 200 can cooperate with the operating mechanism to trip the circuit breaker.

[0093] The electromagnetic trip module 200 includes a trip assembly 210 and a current-carrying member 220 . The trip assembly 210 and the current-carrying member 220 are fixedly connected or integrally arranged to form an independent module. The stationary contact 240 in the contact assembly is arranged on the current-carrying member 220 .

[0094] The electromagnetic trip module 200 is installed inside the housing 100, and the electromagnetic trip module 200 includes a trip assembly 210 and a current-carrying member 220. The trip assembly 210 and the current-carrying member 220 are fixedly connected or integrally arranged to form an independent module. The second end of the current-carrying member 220 is provided with a static contact 240 and an arc-starting angle 250 connected to the static contact 240, so that during the operation of the circuit breaker, the current can be transmitted through the current-carrying member 220. The static contact 240 is arranged on the current-carrying member 220, corresponding to the moving contact in the contact assembly.

[0095] The modular design of the present application makes the structure of the entire circuit breaker more stable, reduces the number of parts, and simplifies the assembly process. This design not only improves production efficiency, but also reduces manufacturing costs, while ensuring the reliability and safety of the circuit breaker in actual use. The handle module 500, operating mechanism, contact assembly, electromagnetic trip module 200 and arc isolation module 300 in the above structure cooperate to form a circuit breaker that can improve the breaking performance and arc extinguishing performance of the circuit breaker, further improving the safety and reliability of the circuit breaker.

[0096] In the present application, a spacing is set between the rotation center axis of the moving contact and the rotation center axis of the contact support in the operating mechanism. By setting the rotation center eccentrically, the opening distance between the moving contact and the static contact 240 can be made larger. This larger opening distance is conducive to the conduction of the arc, thereby improving the arc extinguishing efficiency. Specifically, when current passes through the contacts, an arc will be generated between the contacts. If the opening distance is larger, the arc will have more space to diffuse and cool during the conduction process, making it easier to be extinguished. In this way, by increasing the opening distance between the moving contact and the static contact 240, the conduction efficiency of the arc can be effectively improved, thereby improving the overall arc extinguishing performance.

[0097] Reference Figure 3 As shown, in some examples, the trip assembly 210 and the current-carrying member 220 are riveted together to form an independent module.

[0098] Or, refer to Figure 4 As shown, at least one of the yoke 212 or the bracket 211 in the trip assembly 210 is integrally provided with the current-carrying component 220 to form an independent module.

[0099] The above two methods can both form an independent electromagnetic tripping module 200, and a suitable setting method can be selected according to specific needs.

[0100] The trip assembly 210 and the current-carrying member 220 of the present application can be connected together by riveting and together form an independent module. This method makes the trip assembly 210 and the current-carrying member 220 structurally integrated, which is convenient for installation and maintenance.

[0101] In the trip assembly 210, at least one part of the yoke 212 or the bracket 211 may be designed to be integrated with the current-carrying member 220. This design allows the yoke 212 or the bracket 211 to be combined with the current-carrying member 220 during the manufacturing process to form an independent module. This design is also convenient for overall installation and maintenance.

[0102] The two methods mentioned above, whether through riveting or integrated design, can effectively form an independent electromagnetic trip module 200. The specific method can be determined according to the actual application requirements and production conditions. Different design choices may bring different manufacturing costs, installation conveniences and maintenance efficiency. Therefore, various factors need to be comprehensively considered in actual applications to ensure the performance and reliability of the final product.

[0103] Reference Figure 3 and Figure 4 In some examples, the trip assembly 210 includes a bracket 211 , a yoke 212 , a fixed shaft 213 , and an armature 215 .

[0104] The bracket 211 is provided with an assembly groove. The yoke 212 is arranged in the assembly groove, the current-carrying member 220 is connected to the receiving groove of the yoke 212, and the bracket 211, the yoke 212 and the current-carrying member 220 are riveted to each other. The fixed shaft 213 is penetrated through two opposite groove walls of the assembly groove, and a torsion spring 214 is arranged on the fixed shaft 213. The armature 215 is rotatably connected to the fixed shaft 213 and is located on the side of the yoke 212 away from the bottom of the assembly groove.

[0105] The torsion spring 214 can drive the armature 215 away from the yoke 212. The circuit breaker also includes a lock catch and a trip catch that can lock each other. When the current on the current-carrying member 220 reaches a preset value, the yoke 212 attracts the armature 215 to drive the lock catch and the trip catch to unlock.

[0106] The trip assembly 210 of the present application mainly includes a bracket 211, a yoke 212, a fixed shaft 213 and an armature 215. These parts cooperate together to achieve the function of snap-on tripping.

[0107] Specifically, a special assembly groove is designed on the bracket 211. The assembly groove is provided to accommodate other components. The yoke 212 is placed in the assembly groove to ensure that its position is fixed and stable. The current-carrying member 220 is connected to the receiving groove of the yoke 212, and the receiving groove is designed to accommodate the current-carrying member 220. The bracket 211, the yoke 212 and the current-carrying member 220 are connected to each other by riveting, ensuring the firmness of the connection between them. Other methods of connection can also be used as needed, such as clamping, clamping, etc.

[0108] The fixed shaft 213 is passed through between two opposite groove walls of the assembly groove to ensure the fixed position of the fixed shaft 213. A torsion spring 214 is arranged on the fixed shaft 213. The function of the torsion spring 214 is to provide the necessary elastic preload force to drive the movement of the armature 215. The armature 215 is connected to the fixed shaft 213 by rotation and is located on the side of the yoke 212 away from the bottom of the assembly groove. The purpose of this design is to ensure that the armature 215 can move flexibly. When a large current passes through the current-carrying part 220, the yoke 212 will generate a large electromagnetic force, which can attract the armature 215 to overcome the elastic preload force of the torsion spring 214, and enable the snap-fit ​​portion 216 of the armature 215 to snap onto the lock buckle to realize the opening of the circuit breaker.

[0109] The torsion spring 214 can drive the armature 215 away from the yoke 212, so that the armature 215 can be maintained at a position away from the yoke 212. In addition, the circuit breaker also includes a lock and a trip lock that can lock each other. These two components are designed to ensure that the circuit breaker can achieve the function of locking or unlocking under specific conditions. When the current on the current-carrying part 220 reaches a preset value, the yoke 212 will absorb the armature 215, thereby driving the lock and the trip lock to unlock. This process is achieved through the action of electromagnetic force, which ensures that the circuit breaker can switch states when the current reaches a specific value. In the above process, the electromagnetic force will interact with the elastic force of the torsion spring 214.

[0110] The torsion spring 214 may also be replaced by other types of elastic structures, such as springs, coil springs, spring sheets, etc., as needed. Other types of elastic structures may be adapted to their installation methods and positions based on their characteristics.

[0111] Reference Figure 3 and Figure 4 In some examples, a snap-fitting portion 216 is provided on one side of the armature 215 away from the fixed shaft 213, and the snap-fitting portion 216 can snap-fit ​​to the lock buckle.

[0112] The function of the snapping part 216 is to snap together with the lock under certain conditions. Specifically, when the armature 215 is attracted by the electromagnetic force generated by the yoke 212, the armature 215 will begin to rotate in the direction of the yoke 212. During the rotation of the armature 215, the snapping part 216 gradually abuts against the protruding structure corresponding to the lock. As the armature 215 continues to rotate, the snapping part 216 will eventually snap and trigger the lock, thereby achieving the action of the lock relative to the unlocking and tripping. This series of actions results in the completion of the tripping action of the circuit breaker, ensuring the safe disconnection of the circuit.

[0113] In some examples, a first end of the current-carrying member 220 is connected to the wiring terminal 230 , a second end of the current-carrying member 220 is provided with a stationary contact 240 , and an arc-starting angle 250 is provided on the stationary contact 240 .

[0114] The portion of the current-carrying member 220 between the wiring terminal 230 and the stationary contact 240 is tilted, and the trip assembly 210 is tilted in the middle of the current-carrying member 220 .

[0115] Based on the above example, the first end of the current-carrying member 220 in the present application is connected to the circuit by connecting the wiring terminal 230, and the second end of the current-carrying member 220 is provided with a static contact 240. An arc-starting angle 250 is connected to the static contact 240 so that the arc can be effectively guided when the current is interrupted, thereby protecting the contact from damage. The portion of the current-carrying member 220 between the connection terminal 230 and the static contact 240 is not horizontal, but is arranged in an inclined manner, and such a design helps to improve the tripping efficiency of the tripping assembly 210.

[0116] The trip assembly 210 is designed to be tilted in the middle of the current-carrying part 220. This tilted layout allows the range of the yoke 212 to be expanded. Specifically, within the same width space, by tilting the trip assembly 210, the setting length of the yoke 212 can be made longer. This design enables the yoke 212 to generate a larger electromagnetic field, thereby generating a stronger electromagnetic force. The yoke 212 with a stronger electromagnetic force can work more quickly with the traction armature 215, thereby significantly improving the response speed and breaking capacity of the circuit breaker, ensuring that the circuit can be quickly disconnected under abnormal conditions, and ensuring the safe operation of the entire system.

[0117] In the circuit breaker of the present application, the handle module 500 can be set on the side of the circuit breaker, with the side being the upper side. In this case, the current-carrying member 220 is tilted as a whole, and the height of the first end position is lower than the height of the second end position. This tilted design not only helps to improve the overall mechanical properties, but also enables the current-carrying member 220 to be more stable when current passes through, generates a stronger electromagnetic force, and can reduce vibration and noise caused by excessive current, thereby improving the reliability and service life of the circuit breaker.

[0118] Reference Figure 5 and Figure 6 In some examples, the arc isolation module 300 includes an integrally formed first arc isolation plate 310, a connecting portion 320, and a second arc isolation plate 330. The first arc isolation plate 310, the connecting portion 320, and the second arc isolation plate 330 enclose and form an arc isolation cavity 340. A pressure balance channel 830 is provided on the outer peripheral side of the arc isolation module 300, and the pressure balance channel 830 is connected to the arc extinguishing chamber 900.

[0119] Based on the above example, the arc isolation cavity 340 is used to confine the arc therein to prevent the arc from damaging other components. The pressure balance channel 830 can achieve pressure balance in the arc extinguishing chamber 900, thereby further reducing the pressure inside the arc extinguishing chamber 900 and the corresponding switch device product.

[0120] Reference Figure 5 and Figure 6 In some examples, the arc isolation module 300 is provided with a receiving groove 350 near the static contact 240 , part of the static contact 240 and part of the arc striking angle 250 are in the receiving groove 350 , and the receiving groove 350 is connected to the arc isolation cavity 340 .

[0121] The arc-isolating module 300 is provided with a receiving groove 350 on one side thereof close to the stationary contact 240. The purpose of the receiving groove 350 is to accommodate a portion of the stationary contact 240 and a portion of the arc-striking angle 250, so that the stationary contact 240 and the arc-striking angle 250 can be effectively fixed and protected. And the stationary contact 240 and the arc-striking angle 250 can be better adapted to the arc-isolating module 300. In this way, the relative position of the stationary contact 240 and the arc-striking angle 250 is precisely controlled, thereby ensuring the stability and reliability of the entire circuit breaker. In addition, this design can also lock the position of the stationary contact 240 and the arc-striking angle 250, thereby effectively preventing the external environment from interfering with the stationary contact 240 and the arc-striking angle 250, further improving the service life and safety of the circuit breaker.

[0122] In some examples, the circuit breaker also includes a dual-gold module 400, which is installed on the housing 100, and the arc isolation module 300 is provided with at least one scale mark 360 adapted to the dual-gold module 400, and different scale marks 360 correspond to different assembly indication positions of the dual-gold module 400.

[0123] The dual-gold module 400 of the circuit breaker of the present application is a thermal magnetic tripping structure. The dual-gold module 400 is installed and fixed inside the housing 100 of the circuit breaker, adjacent to the position of the arc isolation module 300. In order to ensure the accuracy and convenience of the assembly process, a plurality of scale marks 360 are specially designed on the surface of the arc isolation module 300. These scale marks 360 are set to match the assembly position of the dual-gold module 400, so that the operator can quickly identify and install the dual-gold module 400 to its correct indicated position according to different scale marks 360. Each different scale mark 360 corresponds to a specific position that the dual-gold module 400 needs to reach during the assembly process, thereby ensuring the precise matching and efficient operation of the entire circuit breaker assembly. Through this design, not only the convenience of assembly is improved, but also the overall performance and reliability of the circuit breaker are further improved.

[0124] Reference Figure 7 and Figure 8In some examples, the circuit breaker further includes a fast closing module 600, which includes a locking member and an energy storage member. The locking member is movably connected to the housing 100, the locking member can lock the moving contact, and the energy storage member is arranged between the moving contact and the contact support.

[0125] When the circuit breaker is initially closed, the locking piece first locks the moving contact, the contact support moves relative to the moving contact and causes the energy storage piece to store energy. As the circuit breaker continues to close, the locking piece unlocks the moving contact, the energy storage piece is released and drives the moving contact to close quickly.

[0126] Based on the above example of the present application, the circuit breaker is also specially provided with a fast closing module 600. The main function of the fast closing module 600 is to realize the fast closing action of the contact assembly. The fast closing module 600 may include a locking member and an energy storage member. The locking member is movably connected to the housing 100 of the circuit breaker and has the function of locking the moving contact. The energy storage member is arranged between the moving contact and the contact support for storing energy.

[0127] When the circuit breaker performs the initial closing operation, the locking member will first lock the moving contact to ensure that it remains stable during the closing process. At the same time, the contact support and the moving contact move relative to each other, so that the energy storage member can store energy. For example, the energy storage member is an elastic member 520, which stores elastic potential energy by compression or stretching. As the circuit breaker continues to perform the closing operation, the locking member will unlock the moving contact in time to release the previously stored energy (such as elastic potential energy, etc.). This release process will drive the moving contact to close quickly, thereby greatly shortening the closing time, improving the closing effect of the circuit breaker, making the closing efficiency higher, reducing the electro-erosion loss between the moving contact and the static contact 240 in the contact assembly, and increasing the service life of the contact assembly.

[0128] Reference Figure 7 and Figure 8 In some examples, the locking member includes a rotation connection portion 610 , a first connection arm 620 , a second connection arm 630 , and an elastic portion 640 .

[0129] The rotating connection part 610 is rotatably connected to the housing 100. The first connecting arm 620 is connected to the rotating connection part 610 at its first end, and a first buckle 621 is provided at its second end, and the first buckle 621 can be snapped to the moving contact. The second connecting arm 630 is connected to the rotating connection part 610 at its first end, and a second buckle 631 is provided at its second end, and the second buckle 631 can be snapped to the handle module 500. The first buckle 621 can be released during the rotation of the handle module 500, and the extension direction of the second connecting arm 630 is set at an angle to the extension direction of the first connecting arm 620.

[0130] The first end of the elastic part 640 is connected to one end of the second connecting arm 630 away from the rotating connecting part 610. A receiving edge is provided on the inner side of the shell 100. The second end of the elastic part 640 abuts against the receiving edge and is in a pre-tightened state. The elastic part 640 can maintain the first buckle 621 and the moving contact in a clamped state through the elastic pre-tightening force.

[0131] During the closing process of the contact assembly, the handle module 500 drives the contact support to move relative to the moving contact, the energy storage component stores energy, the first clip 621 and the moving contact remain in a snap-connected state, and the handle module 500 continues to move. The handle module 500 overcomes the elastic preload force through the second clip 631 and releases the first clip 621. The energy storage component between the moving contact and the contact support is released and drives the moving contact to snap together quickly.

[0132] Based on the above example, the rotating connection part 610 can be rotatably connected to the housing 100 of the circuit breaker. The rotating connection part 610 is the hub of the entire fast closing module 600, ensuring that various components can operate in a coordinated manner.

[0133] The first end of the first connecting arm 620 is connected to the rotating connecting part 610. The second end of the first connecting arm 620 is provided with a first buckle 621. The function of the first buckle 621 is to be able to be engaged with the moving contact. The moving contact is movably connected to the contact support, and an energy storage component is provided between the moving contact and the contact support. The function of the energy storage component is to store energy during the closing process so that it can be quickly released when needed to achieve rapid closing.

[0134] The first end of the second connecting arm 630 is also connected to the rotating connecting portion 610. The second end of the second connecting arm 630 is provided with a second buckle 631. The second buckle 631 can be engaged with the handle module 500. The handle module 500 can release the first buckle 621 during the rotation process, so that the entire closing action can be carried out smoothly. The extension direction of the second connecting arm 630 is set at a certain angle to the extension direction of the first connecting arm 620, and such a design helps to achieve a more accurate and efficient closing action.

[0135] The first end of the elastic part 640 is connected to the end of the second connecting arm 630 away from the rotating connecting part 610. A receiving edge is provided on the inner side of the housing 100, and the second end of the elastic part 640 abuts against the receiving edge, and the initial state of the elastic part 640 is in a pre-tightened state. At this time, the elastic part 640 keeps the first buckle 621 and the contact support position in a clamped state through the elastic pre-tightening force, ensuring that the first buckle 621 and the moving contact can maintain a stable connection during the closing process.

[0136] During the closing process of the contact assembly of the circuit breaker, the handle module 500 drives the contact support to move relative to the moving contact. During this process, the energy storage component starts to store energy. The first buckle 621 and the moving contact are maintained in a clamped state, and the handle module 500 continues to move. The handle module 500 overcomes the elastic preload through the second buckle 631 and releases the first buckle 621. At this time, the energy storage component between the moving contact and the contact support releases energy, driving the moving contact to snap together quickly, thereby achieving the purpose of rapid closing.

[0137] The energy storage member mentioned above in the present application can be a single elastic structure such as a torsion spring, a spring, a coil spring, a spring sheet, etc. (not shown in the figure), or it can be an energy storage mechanism formed by the above elastic structure and a transmission mechanism. The energy storage member has a mounting portion and two force arms, one of which can abut against the moving contact, and the other can abut against the contact support.

[0138] Reference Fig. 9 In some examples, the circuit breaker further includes an arc striking assembly 700 , which is used to guide the arc generated during the circuit breaker breaking process. The arc striking assembly 700 includes an arc striking plate 710 and an arc striking plate 720 in the arc extinguishing chamber 900 .

[0139] The first end of the arc striking plate 710 is connected to the double metal connecting plate 420, the double metal connecting plate 420 is connected to the inner wall of the shell 100, the arc striking plate 720 of the arc extinguishing chamber 900 is arranged at the second end of the arc striking plate 710, and a magnetic conductive structure is arranged on the arc striking plate 710.

[0140] The double metal connecting plate 420, the arc path arc striking plate 710, the arc extinguishing chamber 900 arc striking plate 720 and the magnetic conductive structure are an integrated structure.

[0141] Based on the above example, the circuit breaker of the present application is also provided with an arc striking assembly 700. The main function of the arc striking assembly 700 is to guide and control the arc generated by the circuit breaker during the breaking process to ensure that the arc can be handled safely and effectively. The arc striking assembly 700 mainly includes two key parts: an arc striking plate 710 of an arc path and an arc striking plate 720 of an arc extinguishing chamber 900.

[0142] Specifically, one end of the arc-starting plate 710 is connected to the bimetallic connecting plate 420. The bimetallic connecting plate 420 can more firmly fix the arc-starting plate 710 on the inner wall of the circuit breaker housing 100, ensuring that it can stably play an arc-starting role when an arc is generated. The other end of the arc-starting plate 710 is provided with an arc-extinguishing chamber 900 arc-starting plate 720, which is located at the end of the arc-starting plate 710, further guiding the arc into the arc-extinguishing chamber 900, thereby achieving effective arc extinguishing of the arc.

[0143] In order to further optimize the guiding effect of the arc, a magnetic conductive structure is specially designed on the arc-guiding plate 710. The magnetic conductive structure can effectively guide the path of the arc so that it moves along a predetermined trajectory, thereby improving arc extinguishing efficiency and safety. It is worth mentioning that the double-metal connecting plate 420, the arc-guiding plate 710, the arc-guiding plate 720 of the arc-extinguishing chamber 900 and the magnetic conductive structure are all designed as an integrated structure, which not only simplifies the manufacturing process, but also improves the overall stability and reliability.

[0144] Reference Fig.10 In some examples, the circuit breaker further includes an exhaust assembly 800, which is used to exhaust the gas generated during the arc extinguishing process in the circuit breaker. The exhaust assembly 800 includes a first exhaust channel 810, a second exhaust channel 820 and a pressure balance channel 830:

[0145] The first exhaust channel 810 is connected to the exhaust side of the arc extinguishing chamber 900. At least one partition is arranged in the shell 100. The partition and the inner wall of the shell 100 enclose the first exhaust channel 810. At least one exhaust outlet adapted to the first exhaust channel 810 is opened on the shell 100.

[0146] The second exhaust channel 820 is disposed between the terminal 230 and the inner wall of the housing 100 , a first end of the second exhaust channel 820 is connected to the exhaust side of the arc extinguishing chamber 900 , and a second end of the second exhaust channel 820 is connected to the wiring hole corresponding to the terminal 230 .

[0147] The pressure balance channel 830 is arranged on the arc striking side of the arc extinguishing chamber 900. The arc striking side of the arc extinguishing chamber 900 is provided with an arc runway surrounded by two arc isolation plates. The pressure balance channel 830 is spaced from the arc runway through the arc isolation plates and is connected to the arc extinguishing chamber 900.

[0148] The three channels can break the arc pressure (gas pressure generated during the arc running process), which helps to reduce the internal pressure of the arc extinguishing chamber 900 and the corresponding switch device product through multi-channel pressure relief, thereby reducing or even eliminating the structural damage to the housing 100 and parts caused by high-pressure gas or arc.

[0149] Specifically, the first exhaust channel 810 is directly connected to the exhaust side of the arc extinguishing chamber 900. In order to form this channel, one or more partitions are specially arranged inside the housing 100. These partitions and the inner wall of the housing 100 together enclose the space of the first exhaust channel 810. In addition, at least one exhaust outlet adapted to the first exhaust channel 810 is also provided on the housing 100 to facilitate the smooth discharge of gas.

[0150] The second exhaust channel 820 is cleverly arranged between the wiring terminal 230 and the inner wall of the housing 100. The first end of this channel is connected to the exhaust side of the arc extinguishing chamber 900, and the second end is connected to the wiring hole corresponding to the wiring terminal 230. This design ensures that when an arc is generated, the gas can be discharged smoothly through this channel, thereby reducing the internal pressure.

[0151] The pressure balance channel 830 is arranged on the arc striking side of the arc extinguishing chamber 900. On the arc striking side of the arc extinguishing chamber 900, an arc runway is formed by two arc isolation plates. The pressure balance channel 830 is arranged at intervals from the arc runway through the arc isolation plates and is connected to the inside of the arc extinguishing chamber 900. This design helps to achieve pressure balance through the pressure balance channel 830 when an arc is generated, thereby further reducing the pressure inside the arc extinguishing chamber 900 and the corresponding switch device product.

[0152] Through the exhaust assembly 800, the gas generated by the circuit breaker during the arc extinguishing process can be effectively exhausted, thereby ensuring the stable operation of the circuit breaker and extending its service life. At the same time, this design also improves the safety performance of the circuit breaker and avoids the potential safety hazards caused by gas accumulation.

[0153] In some examples, the circuit breaker further includes a handle module 500 , which is connected to the operating mechanism. The handle module 500 can drive the operating mechanism to move. The handle module 500 includes a handle body 510 and an elastic member 520 .

[0154] The handle body 510 includes a mounting portion, a first clamping portion and a second clamping portion. The elastic member 520 is connected to the mounting portion, a first force arm of the elastic member 520 is connected to the first clamping portion, and a second force arm of the elastic member 520 is connected to the second clamping portion.

[0155] The elastic member 520 can be pre-installed to the handle body 510 and form a pre-installed module. At least one of the first force arm and the second force arm extends to the outside of the handle body 510 , and the extended portion can abut against the inner wall of the shell 100 .

[0156] A connection hole is provided on the handle body 510, and a transmission rod connected to the contact support is installed on the connection hole. During the closing process of the circuit breaker, the handle body 510 can drive the contact support to move through the transmission rod.

[0157] Based on the above example, the circuit breaker of the present application not only includes an operating mechanism, but also further provides a handle module 500. The handle module 500 is closely connected to the operating mechanism and can effectively drive the operating mechanism to perform corresponding actions. The handle module 500 itself is composed of a handle body 510 and an elastic member 520 and is modularly arranged.

[0158] The handle body 510 may include three parts, namely: a mounting portion, a first clamping portion, and a second clamping portion. The elastic member 520 is connected to the mounting portion to ensure its stability and reliability. The two force arms of the elastic member 520 are respectively connected to the first clamping portion and the second clamping portion, so that the design can provide the necessary elasticity and strength during the operation of the handle module 500.

[0159] The elastic member 520 can be pre-assembled into the handle body 510 to form a pre-assembled module. The advantage of this design is that at least one of the two force arms of the elastic member 520 will extend to the outside of the handle body 510, and the design of this extension portion enables the first force arm and the second force arm to contact the corresponding inner wall of the housing 100. When the handle is operated, the force arm of the elastic member 520 will come into contact with the inner wall of the housing 100, thereby generating a certain reaction force, so that the handle has a certain elasticity and feedback during operation. Such a design not only improves the comfort of operation, but also enhances the stability and reliability of the circuit breaker. Since the elastic member 520 is pre-installed on the handle body 510, a part that shakes randomly is reduced, the assembly accuracy is improved, and the assembly difficulty of the circuit breaker is reduced.

[0160] In order to ensure that the handle body 510 can effectively drive the contact support, a connection hole is specially provided on the handle body 510. A transmission rod can be installed through the connection hole, and the transmission rod is directly connected to the contact support. During the closing operation of the circuit breaker, the handle body 510 can drive the contact support to perform corresponding activities through the transmission rod, thereby realizing the normal operation of the circuit breaker. This design not only improves the convenience of operation, but also ensures the accuracy and reliability during the operation.

[0161] The present application can improve the breaking capacity so that the circuit breaker can more effectively cut off the circuit when facing high current or short circuit, thereby protecting the electrical system from damage. And by optimizing the structure and materials of each component, the modular setting of the internal structure of the circuit breaker can be realized, so that the structure of the entire circuit breaker is more stable, the number of parts can be reduced, and the assembly process is simplified. This design not only improves production efficiency, but also reduces manufacturing costs, while ensuring the reliability and safety of the circuit breaker in actual use.

[0162] The circuit breaker of the present application can respond quickly in a short time, ensuring that the current is cut off before it reaches a dangerous level. This not only improves the safety of the electrical system, but also extends the service life of the equipment and reduces maintenance costs. In addition, the stronger breaking capacity also means that the circuit breaker can be used in a wider range of electrical environments and adapt to different application scenarios and needs.

[0163] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0164] The above are only preferred examples of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A circuit breaker, It is characterized in that The circuit breaker comprises: case; An operating mechanism is mounted on the housing, and a contact support of the operating mechanism is rotatably connected to an inner wall of the housing; A contact assembly, comprising a moving contact and a stationary contact, wherein the moving contact is rotatably connected to the housing, and the moving contact is movably connected to the contact support, wherein the rotation center axis of the moving contact is spaced from the rotation center axis of the contact support so as to increase the opening distance between the moving contact and the stationary contact; An arc isolation module is installed on the shell. The arc isolation module can isolate the arc generated during the breaking process of the circuit breaker. The arc isolation module has an arc isolation cavity. The static contact of the static contact is located in the arc isolation cavity, and the moving trajectory of the moving contact in the moving contact is located in the arc isolation cavity.

2. The circuit breaker according to claim 1, It is characterized in that The arc isolation module includes an integrally formed first arc isolation plate, a connecting portion and a second arc isolation plate, the first arc isolation plate, the connecting portion and the second arc isolation plate enclose and form the arc isolation cavity, and a pressure balance channel is provided on the outer peripheral side of the arc isolation module, and the pressure balance channel is connected to the arc extinguishing chamber.

3. The circuit breaker according to claim 1, It is characterized in that The circuit breaker further comprises a fast closing module, the fast closing module comprises a locking member and an energy storage member, the locking member is movably connected to the housing, the locking member can lock the moving contact, and the energy storage member is arranged between the moving contact and the contact support; When the circuit breaker is initially closed, the locking member first locks the moving contact, the contact support moves relative to the moving contact and causes the energy storage member to store energy, and when the circuit breaker continues to be closed, the locking member unlocks the moving contact, and the energy storage member releases and drives the moving contact to close quickly.

4. The circuit breaker according to claim 3, It is characterized in that The locking member comprises: A rotating connection portion, rotatably connected to the housing; a first connecting arm, wherein a first end of the first connecting arm is connected to the rotating connecting portion, and a first buckle is provided at a second end of the first connecting arm, and the first buckle can be buckled to the moving contact; a second connecting arm, wherein a first end of the second connecting arm is connected to the rotating connecting portion, a second buckle is provided at a second end of the second connecting arm, the second buckle can be snapped to the handle module, and the first buckle can be released during the rotation of the handle module, and an extension direction of the second connecting arm is set at an angle to an extension direction of the first connecting arm; an elastic part, wherein a first end of the elastic part is connected to an end of the second connecting arm away from the rotating connecting part, a receiving edge is provided on the inner side of the shell, a second end of the elastic part abuts against the receiving edge and is in a pre-tightened state, and the elastic part can maintain the first buckle and the moving contact in a clamped state through an elastic pre-tightening force; During the closing process of the contact assembly, the handle module drives the contact support to move relative to the moving contact, the energy storage component stores energy, the first clip and the moving contact are maintained in a snap-fit ​​state, the handle module continues to move, the handle module overcomes the elastic preload force through the second clip and releases the first clip, the energy storage component between the moving contact and the contact support is released and drives the moving contact to snap together quickly.

5. The circuit breaker according to claim 2, It is characterized in that The circuit breaker further includes an exhaust component, which is used to exhaust the gas generated during the arc extinguishing process in the circuit breaker, and the exhaust component includes: a first exhaust passage, connected to the exhaust side of the arc extinguishing chamber, wherein at least one partition is provided in the housing, wherein the partition and the inner wall of the housing enclose the first exhaust passage, and at least one exhaust outlet adapted to the first exhaust passage is provided on the housing; A second exhaust channel is provided between the wiring terminal and the inner wall of the housing, a first end of the second exhaust channel is connected to the exhaust side of the arc extinguishing chamber, and a second end of the second exhaust channel is connected to the wiring hole corresponding to the wiring terminal; The pressure balance channel is arranged on the arc striking side of the arc extinguishing chamber. The arc striking side of the arc extinguishing chamber is provided with an arc runway surrounded by two arc isolation plates. The pressure balance channel is spaced apart from the arc runway through the arc isolation plates and is connected to the arc extinguishing chamber.

6. The circuit breaker according to claim 1, It is characterized in that The circuit breaker further comprises an arc striking assembly, which is used to guide the arc generated during the circuit breaker breaking process, and the arc striking assembly comprises an arc striking plate for an arc path and an arc striking plate for an arc extinguishing chamber; The first end of the arc-starting plate is connected to a bimetallic connecting plate, the bimetallic connecting plate is connected to the inner wall of the shell, the arc-starting plate of the arc-extinguishing chamber is arranged at the second end of the arc-starting plate, and the arc-starting plate is provided with a magnetic conductive structure; The double metal connecting plate, the arc path arc starting plate, the arc extinguishing chamber arc starting plate and the magnetic conductive structure are an integrated structure.

7. The circuit breaker according to any one of claims 1 to 6, It is characterized in that The circuit breaker further comprises a handle module, the handle module is connected to the operating mechanism, the handle module can drive the operating mechanism to move, and the handle module comprises: The handle body comprises a mounting portion, a first clamping portion and a second clamping portion; An elastic member connected to the mounting portion, a first force arm of the elastic member connected to the first clamping portion, and a second force arm of the elastic member connected to the second clamping portion; The elastic member can be pre-installed on the handle body to form a pre-installed module, at least one of the first force arm and the second force arm extends to the outside of the handle body, and the extended portion can abut against the inner wall of the shell; The handle body is provided with a connection hole, and a transmission rod connected to the contact support is installed on the connection hole. During the closing process of the circuit breaker, the handle body can drive the contact support to move through the transmission rod.

8. The circuit breaker according to any one of claims 1 to 6, It is characterized in that The circuit breaker further comprises an electromagnetic tripping module, which is mounted on the housing and can cooperate with the operating mechanism to trip the circuit breaker; The electromagnetic trip module comprises a trip assembly and a current-carrying part. The trip assembly is fixedly connected to the current-carrying part or is integrally arranged to form an independent module. The static contact in the contact assembly is arranged on the current-carrying part.

9. The circuit breaker according to claim 8, It is characterized in that The trip assembly is riveted to the current-carrying component to form an independent module; Alternatively, at least one of the yoke or the bracket in the trip assembly is integrally arranged with the current-carrying component to form an independent module.

10. The circuit breaker according to claim 8, It is characterized in that The first end of the current-carrying member is connected to the wiring terminal, the second end of the current-carrying member is provided with the static contact, and the static contact is provided with an arc-starting angle; The current-carrying member is disposed at an angle in the portion between the wiring terminal and the stationary contact, and the trip assembly is disposed at an angle in the middle portion of the current-carrying member.

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