Circuit breaker

Abstract

The utility model discloses a circuit breaker, and relates to the technical field of circuit breakers, and the circuit breaker comprises a first path and a second path. The first path comprises a first wire inlet end, a first contact assembly, a second contact assembly and a first wire outlet end, the first wire inlet end is electrically connected with the first contact assembly, the first contact assembly is electrically connected with the second contact assembly, and the second contact assembly is electrically connected with the first wire outlet end. The second path comprises a second wire inlet end, a third contact assembly and a second wire outlet end. The third contact assembly is electrically connected between the second wire inlet end and the second wire outlet end. The second contact assembly is arranged between the first contact assembly and the third contact assembly, and the first wire outlet end deviates towards the direction of the first contact assembly relative to the second contact assembly. According to the circuit breaker provided by the invention, the rated voltage of the circuit breaker can be improved, and meanwhile, the use convenience and safety of the circuit breaker are improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a circuit breaker. Background Art

[0002] With the development of the photovoltaic industry, the voltage requirements of photovoltaic systems have increased. Increasing the rated voltage of photovoltaic systems is conducive to reducing transmission losses and equipment costs. Therefore, the switching devices used in conjunction with photovoltaic systems, such as DC molded case circuit breakers, also need to increase their rated voltage accordingly.

[0003] In the prior art, an external cascade method is generally used to increase the number of stages of a DC molded case circuit breaker, that is, multiple breakpoints are provided through multiple cascaded contacts to increase the rated voltage of the DC molded case circuit breaker.

[0004] However, increasing the number of levels of DC molded case circuit breakers not only increases the size of the circuit breakers, but also increases the complexity of external wiring of the DC molded case circuit breakers, resulting in lower electrical safety and affecting the use of the circuit breakers. Utility Model Content

[0005] The purpose of the present application is to provide a circuit breaker that can improve the rated voltage of the circuit breaker while improving the convenience and safety of the circuit breaker.

[0006] The embodiment of the present application provides a circuit breaker, comprising: a first passage and a second passage. The first passage comprises a first incoming line terminal, a first contact assembly, a second contact assembly and a first outgoing line terminal, the first incoming line terminal is electrically connected to the first contact assembly, the first contact assembly is electrically connected to the second contact assembly, and the second contact assembly is electrically connected to the first outgoing line terminal. The second passage comprises a second incoming line terminal, a third contact assembly and a second outgoing line terminal, the third contact assembly is electrically connected between the second incoming line terminal and the second outgoing line terminal. The second contact assembly is arranged between the first contact assembly and the third contact assembly, and the first outgoing line terminal is offset relative to the second contact assembly toward the direction of the first contact assembly.

[0007] The embodiment of the present application transforms the circuit in the circuit breaker, connects the first incoming terminal, the first contact assembly, the second contact assembly and the first outgoing terminal in series to form a first path, and connects the second incoming terminal, the third contact assembly and the second outgoing terminal in series to form a second path, thereby effectively increasing the rated voltage of the circuit breaker.

[0008] At the same time, this arrangement can also reduce the number of external wiring ports of the circuit breaker. Compared with a traditional circuit breaker in which each contact assembly corresponds to a set of incoming and outgoing terminals, the circuit breaker has more external wiring ports, which makes the user's wiring operation cumbersome and difficult. The embodiment of the present application connects the first contact assembly and the second contact assembly in the circuit breaker in series into a path, which reduces the number of external wiring ports while increasing the rated voltage of the circuit breaker, simplifies the wiring operation of the circuit breaker, and improves the user experience.

[0009] In addition, the first contact assembly and the third contact assembly are arranged at opposite sides of the second contact assembly, so that the first incoming line terminal connected to the first contact assembly can be separated from the second incoming line terminal connected to the third contact assembly. On the one hand, it is convenient for wiring the first incoming line terminal and the second incoming line terminal, and on the other hand, it can increase the electrical insulation between the first incoming line terminal and the second incoming line terminal, which is beneficial to improving the convenience and safety of using the circuit breaker.

[0010] In an optional embodiment, the first contact assembly includes a first moving contact and a first stationary contact, the second contact assembly includes a second moving contact and a second stationary contact, and the first stationary contact and the second stationary contact are electrically connected. The first inlet terminal is arranged on a side of the first stationary contact away from the first moving contact, and the first inlet terminal is electrically connected to the first moving contact, and the first outlet terminal is arranged on a side of the first moving contact away from the first stationary contact, and the first outlet terminal is electrically connected to the second moving contact.

[0011] Based on the above-mentioned embodiments of the present application, this wiring method is adopted in the first path. When the circuit breaker is disconnected, the magnetic field generated by the adjacent pole current causes the arcs generated between the adjacent moving and static contacts to repel each other, which is easier to extinguish than the magnetic field generated by the adjacent pole current in the same direction attracting the arcs generated between the adjacent moving and static contacts. Therefore, this embodiment improves the arc extinguishing ability of the circuit breaker through the wiring method in which the adjacent pole currents are in opposite directions, thereby improving the performance and reliability of the circuit breaker.

[0012] In an optional embodiment, the first passage further includes a first connecting member, and the first connecting member electrically connects the first incoming terminal and the first moving contact.

[0013] Based on the above-mentioned embodiments of the present application, the first incoming line terminal is arranged on a side of the first static contact away from the first moving contact, and the arrangement of the first connecting member facilitates the electrical connection between the first incoming line terminal and the first moving contact, so as to adjust the direction of the current of adjacent poles in the first path. At the same time, the arrangement of the first connecting member can ensure that the electrical connection between the first incoming line terminal and the first moving contact is more stable and reliable, thereby improving the performance and reliability of the circuit breaker.

[0014] In an optional embodiment, the first connecting member includes an integrally arranged first conductive plate, a first connecting portion, and a second connecting portion, the first connecting portion is arranged at the first end of the first conductive plate, the first connecting portion is connected to the first incoming line terminal, the second connecting portion is arranged at the second end of the first conductive plate, the second connecting portion is connected to the first moving contact, and the first conductive plate is arranged on a side of the first contact assembly away from the second contact assembly.

[0015] Based on the above-mentioned embodiments of the present application, the first connecting member formed integrally by the first conductive plate, the first connecting part and the second connecting part has the characteristics of simple structure and easy assembly to the circuit breaker on the one hand, and on the other hand, the first conductive plate as a plate-like structure has high mechanical strength, which is conducive to maintaining the connection stability between the first incoming terminal and the first moving contact, and has higher stability and conductivity than direct connection through a wire.

[0016] In an optional embodiment, the first passage further includes a second connecting member, and the second connecting member electrically connects the first stationary contact and the second stationary contact.

[0017] Based on the above-mentioned embodiments of the present application, the provision of the second connecting member can improve the stability of the electrical connection between the first stationary contact and the second stationary contact, so that the current in the first contact assembly can stably and smoothly enter the second contact assembly, ensuring that the first path is in a normal state.

[0018] In an optional embodiment, the second connecting member includes an integrally arranged second conductive plate, a third connecting portion and a fourth connecting portion, the third connecting portion is arranged at the first end of the second conductive plate, the third connecting portion is connected to the first static contact, the fourth connecting portion is arranged at the second end of the second conductive plate, and the fourth connecting portion is connected to the second static contact.

[0019] Based on the above-mentioned embodiment of the present application, the second connector formed by the second conductive plate, the third connecting portion and the fourth connecting portion is simple in structure on the one hand, and on the other hand, the second conductive plate is a plate-shaped structure using a hard connection method, and its mechanical strength is relatively high. Compared with direct connection through a wire, the second conductive plate is easy to assemble to the circuit breaker, occupies a small space, and is conducive to maintaining the stability of the electrical connection, thereby ensuring that the current flowing through the first contact assembly can stably and smoothly flow to the second contact assembly.

[0020] In an optional embodiment, the first passage further includes a third connecting member, and the third connecting member electrically connects the second moving contact and the first outlet terminal.

[0021] Based on the above-mentioned embodiments of the present application, the provision of the third connecting member can improve the stability of the electrical connection between the second moving contact and the first outlet terminal, so that the current flowing through the second contact assembly can flow out from the first outlet terminal stably and smoothly, further ensuring that the first path is in a normal state.

[0022] In an optional embodiment, the first outlet terminal and the first inlet terminal are located on opposite sides of the first contact assembly, and the first outlet terminal is arranged on a side of the first moving contact away from the first stationary contact.

[0023] Based on the above-mentioned embodiments of the present application, the first incoming terminal and the first outgoing terminal are arranged on opposite sides of the first contact assembly, so that the first incoming terminal and the first outgoing terminal are located away from the third contact assembly, and the distance between the first incoming terminal and the second incoming terminal and between the first outgoing terminal and the second outgoing terminal can be increased, which is beneficial to improving the electrical insulation between the external wiring ports of the circuit breaker and improving the safety of the circuit breaker.

[0024] In an optional embodiment, the third connecting member includes an integrally arranged third conductive plate, a first bending portion, and a second bending portion, and the third conductive plate is arranged between the first moving contact and the first outlet terminal. The first bending portion is arranged at the first end of the third conductive plate, the first bending portion is bent toward the second moving contact, and is connected to the second moving contact, and the second bending portion is arranged at the second end of the third conductive plate, the second bending portion is bent toward the first outlet terminal, and is connected to the first outlet terminal.

[0025] Based on the above-mentioned embodiment of the present application, the third connector formed by the third conductive plate, the first bending portion and the second bending portion is simple in structure on the one hand, and the third conductive plate, as a plate-shaped structure using a hard connection method, has a high mechanical strength on the other hand. Compared with direct connection through a wire, the second conductive plate is easy to assemble to the circuit breaker, occupies less space, and is conducive to maintaining the stability of the electrical connection, thereby ensuring that the current flowing through the second contact assembly can stably and smoothly flow to the first outlet terminal.

[0026] In an optional embodiment, the first passage further includes a first release, and the first release is electrically connected between the first outlet terminal and the second contact assembly.

[0027] Based on the above-mentioned embodiments of the present application, the first release is configured to assist in disconnecting the first path, so as to realize the protection function of the circuit breaker to the circuit in which it is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the overall structure of a circuit breaker provided in an embodiment of the present application.

[0030] Figure 2 A schematic diagram of the internal path structure of a circuit breaker provided in an embodiment of the present application.

[0031] Figure 3 A schematic diagram of the structure of the first path and the second path provided in an embodiment of the present application.

[0032] Figure 4 This is one of the usage scenarios of the first path and the second path provided in the embodiment of the present application.

[0033] Figure 5 This is the second usage scenario of the first path and the second path provided in the embodiment of the present application.

[0034] Figure 6 A schematic diagram of the structure in which the first connecting member provided in an embodiment of the present application is disposed in a circuit breaker.

[0035] Figure 7 A schematic structural diagram of the first connecting member provided in an embodiment of the present application.

[0036] Figure 8 A schematic diagram of the structure in which the second connecting member provided in an embodiment of the present application is installed to the first passage.

[0037] Fig. 9 A schematic diagram of the connection structure between the second connecting member and the first passage provided in an embodiment of the present application.

[0038] Fig.10 A schematic diagram of the structure of the second connecting member provided in an embodiment of the present application.

[0039] Fig.11 A schematic diagram of the structure of the connection between the third connecting member and the second moving contact provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 1-circuit breaker; 2-first passage; 21-first incoming terminal; 22-first contact assembly; 221-first moving contact; 222-first stationary contact; 2221-second connecting hole; 23-second contact assembly; 231-second moving contact; 232-second stationary contact; 2321-fourth connecting hole; 24-first outgoing terminal; 25-first connecting piece; 251-first conductive plate; 252-first connecting portion; 253-second connecting portion; 26-second connecting piece; 261-second conductive plate; 262-third connecting portion; 2621-first connecting hole; 263-fourth connecting portion; 2631-third connecting hole; 27-third connecting piece; 271-third conductive plate; 272-first bending portion; 273-second bending portion; 28-first release; 3-second passage; 31-second incoming terminal; 32-third contact assembly; 33-second outgoing terminal; 34-second release. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which 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, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In recent years, with the proposal of the "carbon peak and carbon neutrality" goals, clean energy represented by photovoltaics has ushered in a new round of rapid development. Among them, high-voltage photovoltaic power generation technology has become a research hotspot because it can effectively increase power density and reduce power station costs and losses. However, as the voltage increases, the difficulty of protecting the DC side of the system also increases.

[0048] At present, the DC circuit breakers widely used in photovoltaic systems are not developed for DC applications, but are simply modified from AC circuit breakers by increasing the number of poles and lengthening the contact opening distance. As a result, most DC circuit breakers used in high-voltage photovoltaic systems are four-pole structures, which are large in size and high in cost, and the temperature rise, power consumption and short-circuit protection performance cannot fully meet the system requirements.

[0049] Based on this, an embodiment of the present application provides a circuit breaker that can improve the rated voltage of the circuit breaker while improving the ease of use and safety of the circuit breaker.

[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0051] Please refer to Figure 1 and Figure 2 The present embodiment provides a circuit breaker 1, comprising: a first passage 2 and a second passage 3. The first passage 2 comprises a first inlet terminal 21, a first contact assembly 22, a second contact assembly 23 and a first outlet terminal 24, the first inlet terminal 21 is electrically connected to the first contact assembly 22, the first contact assembly 22 is electrically connected to the second contact assembly 23, and the second contact assembly 23 is electrically connected to the first outlet terminal 24. The second passage 3 comprises a second inlet terminal 31, a third contact assembly 32 and a second outlet terminal 33, the third contact assembly 32 is electrically connected between the second inlet terminal 31 and the second outlet terminal 33. The second contact assembly 23 is disposed between the first contact assembly 22 and the third contact assembly 32, and the first outlet terminal 24 is offset relative to the second contact assembly 23 toward the first contact assembly 22.

[0052] Reference Figures 3 to 5In the embodiment of the present application, by modifying the connection method between the circuit breaker 1 and the external circuit, the first incoming terminal 21, the first contact assembly 22, the second contact assembly 23 and the first outgoing terminal 24 are connected in series to form a first passage 2, and the second incoming terminal 31, the third contact assembly 32 and the second outgoing terminal 33 are connected in series to form a second passage 3, which can effectively increase the rated voltage of the first passage 2 in the circuit breaker 1.

[0053] Reference Figure 4 and Figure 5 In the first passage 2, the first inlet terminal 21 can be used to connect an external power source or a load. The first contact assembly 22 usually has two contact points. When the circuit breaker 1 is in an open state, the two contact points of the first contact assembly 22 are separated, and when the circuit breaker 1 is closed, the two contact points of the first contact assembly 22 are in contact with each other. The second contact assembly 23 is electrically connected to the first contact assembly 22. The second contact assembly 23 is similar to the first contact assembly 22 and also has two contact points. It can be in an open state or a closed state at the same time as the first contact assembly 22. The first contact assembly 22 and the second contact assembly 23 are in a closed state at the same time to make the first passage 2 conductive. The first outlet terminal 24 is used to output the current generated by the external power source, so that the current is output from the circuit breaker 1 to an external device or line.

[0054] In the second passage 3, the second inlet terminal 31 is similar to or the same as the first inlet terminal 21, and can be connected to an external power source or load respectively with the first inlet terminal 21. The third contact assembly 32 is similar to the first contact assembly 22, and both have two contact points. When the circuit breaker 1 is in the open state, the two contact points of the third contact assembly 32 are disconnected, and when the circuit breaker 1 is closed, the two contact points of the third contact assembly 32 contact each other, so that the second passage 3 is turned on. The second outlet terminal 33 is the same as the first outlet terminal 24, and is also used to output current, so that the current is output from the circuit breaker 1 to an external device or line.

[0055] The first contact assembly 22 and the second contact assembly 23 are connected in series in the first passage 2, so that the resistance in the first passage 2 is higher and the voltage that can be withstood is higher, thereby effectively increasing the rated voltage of the circuit breaker 1. Specifically, after the first contact assembly 22 and the second contact assembly 23 are connected in series, the resistance on the first passage 2 can be increased, thereby increasing the rated voltage of the circuit breaker 1.

[0056] At the same time, this arrangement can also reduce the number of external wiring ports of the circuit breaker 1. In a conventional circuit breaker, each contact assembly corresponds to a set of incoming and outgoing terminals. This arrangement results in a large number of external wiring ports for the circuit breaker 1, which makes the wiring operation cumbersome and difficult for the user. Compared with conventional circuit breakers, the embodiment of the present application connects the first contact assembly 22 and the second contact assembly 23 in the circuit breaker 1 in series into a path, thereby increasing the rated voltage of the circuit breaker 1 while reducing the number of external wiring ports, simplifying the wiring operation of the circuit breaker 1, and improving the user experience.

[0057] The above-described embodiment only provides a Figures 1 to 5 For the implementation of the circuit breaker 1, those skilled in the art can modify and design variants of the above embodiments according to specific application scenarios and requirements. For example, multiple groups of first passages 2 can be set in the circuit breaker 1, or the number of contact assemblies connected in series in the first passages 2 can be increased. Both methods can further improve the rated voltage of the circuit breaker 1 and reduce the external wiring ports of the circuit breaker 1, and are highly practical. In addition, the positions of the first inlet terminal 21 and the first outlet terminal 24 can be swapped, and the positions of the second inlet terminal 31 and the second outlet terminal 33 can also be swapped, which can also achieve the above effects.

[0058] In addition, refer to Figure 2 The first contact assembly 22 and the third contact assembly 32 are spaced apart on opposite sides of the second contact assembly 23, so that the first incoming line terminal 21 connected to the first contact assembly 22 can be spaced apart from the second incoming line terminal 31 connected to the third contact assembly 32. On the one hand, it is convenient to connect the first incoming line terminal 21 and the second incoming line terminal 31, and on the other hand, it can increase the electrical insulation between the first incoming line terminal 21 and the second incoming line terminal 31, which is beneficial to improving the convenience and safety of the circuit breaker 1.

[0059] Among them, refer to Figure 3 The first inlet terminal 21 is arranged at a position close to the first contact assembly 22 and is electrically connected to the first contact assembly 22. The second inlet terminal 31 is arranged at a position close to the third contact assembly 32 and is electrically connected to the third contact assembly 32. In this way, the first inlet terminal 21 and the second inlet terminal 31 can be spaced apart, thereby improving the electrical insulation between the first inlet terminal 21 and the second inlet terminal 31. In addition, the second outlet terminal 33 is arranged at a position close to the third contact assembly 32 and is electrically connected to the third contact assembly 32. Since the first outlet terminal 24 needs to be electrically connected to the second contact assembly 23. The first outlet terminal 24 is electrically connected to the second contact assembly 23 and is offset relative to the second contact assembly 23 toward the first contact assembly 22. While conducting the first passage 2, the distance between the first outlet terminal 24 and the second outlet terminal 33 can be increased, thereby improving the electrical insulation between the first outlet terminal 24 and the second outlet terminal 33.

[0060] Reference Figures 3 to 5 In some embodiments, the first contact assembly 22 includes a first moving contact 221 and a first stationary contact 222, the second contact assembly 23 includes a second moving contact 231 and a second stationary contact 232, and the first stationary contact 222 and the second stationary contact 232 are electrically connected. The first inlet terminal 21 is arranged on a side of the first stationary contact 222 away from the first moving contact 221, and the first inlet terminal 21 is electrically connected to the first moving contact 221, and the first outlet terminal 24 is arranged on a side of the first moving contact 221 away from the first stationary contact 222, and the first outlet terminal 24 is electrically connected to the second moving contact 231.

[0061] Based on the above-mentioned embodiment of the present application, this wiring method is adopted in the first path 2. When the circuit breaker 1 is disconnected, the magnetic field generated by the adjacent pole current causes the arc generated between the adjacent moving and static contacts to repel each other, which is easier to extinguish than the magnetic field generated by the adjacent pole current in the same direction attracting the arc generated between the adjacent moving and static contacts. Therefore, this embodiment improves the arc extinguishing ability of the circuit breaker 1 through the wiring method in which the adjacent pole currents have opposite directions, thereby improving the performance and reliability of the circuit breaker 1.

[0062] In the first contact assembly 22, the first moving contact 221 can contact the first static contact 222 when the circuit breaker 1 is closed to achieve circuit connectivity. In the second contact assembly 23, the second moving contact 231 can contact the second static contact 232 when the circuit breaker 1 is closed to achieve circuit connectivity. The first static contact 222 and the second static contact 232 are connected together by an electrical connection to achieve electrical connection between the two static contacts.

[0063] Specifically, when the circuit breaker 1 is closed, the current input from the first incoming terminal 21 will be directly input into the first moving contact 221, transmitted to the first static contact 222 through the contact point between the first moving contact 221 and the first static contact 222, transmitted to the second static contact 232 through the electrical connection between the first static contact 222 and the second static contact 232, and then transmitted to the second moving contact 231 through the contact point between the second static contact 232 and the second moving contact 231, and finally output from the second moving contact 231 through the first outgoing terminal 24 to the circuit breaker 1, thereby achieving conduction of the circuit in which the circuit breaker 1 is located.

[0064] Among them, refer to Figure 3, the first incoming terminal 21 is arranged on a side of the first static contact 222 away from the first moving contact 221, and the first incoming terminal 21 bypasses the first static contact 222 and is connected to the first moving contact 221, so that the first incoming terminal 21 and the first outgoing terminal 24 can be located on opposite sides of the first passage 2. Under the premise of not affecting the wiring of the circuit breaker 1, the current directions of adjacent poles in the first passage 2 can be opposite, which is conducive to the extinction of the arc between adjacent poles when the circuit breaker 1 is disconnected.

[0065] Reference Figure 3 In some embodiments, the first passage 2 further includes a first connecting member 25 , and the first connecting member 25 electrically connects the first incoming terminal 21 and the first moving contact 221 .

[0066] Based on the above-mentioned embodiment of the present application, the first incoming terminal 21 is arranged on a side of the first static contact 222 away from the first moving contact 221, and the arrangement of the first connector 25 facilitates the electrical connection between the first incoming terminal 21 and the first moving contact 221, so as to adjust the direction of the current of adjacent poles in the first passage 2. At the same time, the arrangement of the first connector 25 can ensure that the electrical connection between the first incoming terminal 21 and the first moving contact 221 is more stable and reliable, thereby improving the performance and reliability of the circuit breaker 1.

[0067] The first connector 25 can be configured to electrically connect the first inlet terminal 21 and the first moving contact 221 in a flexible connection or a hard connection. When the flexible connection is used, the first connector 25 can be configured as a wire, and when the hard connection is used, the first connector 25 can be configured as a conductive plate. Specifically, the first connector 25 can be configured as a component with good electrical conductivity, low contact resistance, high mechanical strength, and wear resistance. For example, the first connector 25 can be configured as copper, aluminum, or an alloy thereof.

[0068] Reference Figure 6 and Figure 7 In some embodiments, the first connecting member 25 includes an integrally arranged first conductive plate 251, a first connecting portion 252 and a second connecting portion 253, the first connecting portion 252 is arranged at the first end of the first conductive plate 251, the first connecting portion 252 is connected to the first incoming terminal 21, the second connecting portion 253 is arranged at the second end of the first conductive plate 251, the second connecting portion 253 is connected to the first moving contact 221, and the first conductive plate 251 is arranged on the side of the first contact assembly 22 away from the second contact assembly 23.

[0069] Based on the above-mentioned embodiments of the present application, the first connecting member 25 integrally formed by the first conductive plate 251, the first connecting portion 252 and the second connecting portion 253 has the characteristics of simple structure and easy assembly to the circuit breaker 1. On the other hand, the first conductive plate 251 as a plate-like structure has high mechanical strength, which is conducive to maintaining the connection stability between the first incoming terminal 21 and the first moving contact 221. Compared with direct connection through a wire, the stability and conductivity are higher.

[0070] Specifically, refer to Figure 7 and Figure 8 The first connection part 252 is arranged at the first end of the first conductive plate 251, and its main function is to connect the first inlet terminal 21 and the first conductive plate 251, so that the current can smoothly flow from the first inlet terminal 21 to the first conductive plate 251. The first connection part 252 is provided with a connection structure matching the first inlet terminal 21, so that the first connection part 252 is stably connected to the first inlet terminal 21. Exemplarily, the first connection part 252 can be fixed to the first inlet terminal 21 by welding, threaded connection or clamping, so as to achieve a stable electrical connection.

[0071] Reference Figure 7 The first conductive plate 251 extends from the first inlet terminal 21 to the direction of the first moving contact 221 to guide the current from the first inlet terminal 21 to the first moving contact 221. The first conductive plate 251 is arranged on a side of the first contact assembly 22 away from the second contact assembly 23, so that the first static contact 222 can be bypassed. At the same time, the current direction on the first conductive plate 251 is opposite to the current direction on the first contact assembly 22, which is conducive to the extinguishing of the arc between the first conductive plate 251 and the first contact assembly 22, and improves the stability of the first passage 2.

[0072] Reference Figure 6 and Figure 7 The first conductive plate 251 is configured as a vertical plate-like structure. The first contact assembly 22 has a vertical plane on one side away from the second contact assembly 23. The first conductive plate 251 is parallel to the vertical plane. This configuration has the characteristic of occupying little space and is beneficial to reducing the volume of the circuit breaker 1.

[0073] Reference Figure 7 and Figure 8 The second connection part 253 is arranged at the second end of the first conductive plate 251. Its main function is to connect the first conductive plate 251 and the first moving contact 221 so that the current can flow smoothly from the first conductive plate 251 to the first contact assembly 22. The second connection part 253 is provided with a connection structure matching the first moving contact 221. Similar to the first connection part 252, the second connection part 253 should also be fixed to the first moving contact 221 by welding, threaded connection or clamping to achieve a stable electrical connection.

[0074] Among them, refer to Figure 7 The first connection part 252 and the second connection part 253 are both parts bent from the first conductive plate 251 to the direction of the first contact assembly 22. The first connection part 252 is bent from the first end of the first conductive plate 251 to the direction of the first contact assembly 22, and the second connection part 253 is bent from the second end of the first conductive plate 251 to the direction of the first contact assembly 22. Therefore, the one-piece molding method is convenient for production and manufacturing. Of course, the first connection part 252 can also be electrically connected to the first conductive plate 251 and kept fixed in other ways, and the second connection part 253 can also be electrically connected to the first conductive plate 251 and kept fixed in other ways. It can be adjusted according to specific production and use requirements to meet the function of the first connector 25 being able to stably connect the first incoming terminal 21 and the first moving contact 221.

[0075] Reference Figure 8 In some embodiments, the first passage 2 further includes a second connecting member 26 , and the second connecting member 26 electrically connects the first stationary contact 222 and the second stationary contact 232 .

[0076] Based on the above-mentioned embodiments of the present application, the provision of the second connecting member 26 can improve the stability of the electrical connection between the first stationary contact 222 and the second stationary contact 232, so that the current in the first contact assembly 22 can stably and smoothly enter the second contact assembly 23, ensuring that the first passage 2 is in a normal state.

[0077] Similar to the first connector 25, the second connector 26 can also be configured to electrically connect the first static contact 222 and the second static contact 232 in the form of a soft connection or a hard connection. When the soft connection is configured, the second connector 26 can be configured as a structure such as a wire, and when the hard connection is configured, the second connector 26 can be configured as a structure such as a conductive plate. Specifically, the second connector 26 can be configured as a component with good electrical conductivity, low contact resistance, high mechanical strength, and wear resistance. For example, the second connector 26 can be configured as copper, aluminum, or an alloy thereof.

[0078] Reference Figure 8 and Fig. 9 In some embodiments, the second connecting member 26 includes an integrally arranged second conductive plate 261, a third connecting portion 262 and a fourth connecting portion 263, the third connecting portion 262 being arranged at the first end of the second conductive plate 261, the third connecting portion 262 being connected to the first static contact 222, the fourth connecting portion 263 being arranged at the second end of the second conductive plate 261, and the fourth connecting portion 263 being connected to the second static contact 232.

[0079] Based on the above-mentioned embodiment of the present application, the second connector 26 formed by the second conductive plate 261, the third connecting portion 262 and the fourth connecting portion 263 is simple in structure on the one hand, and on the other hand, the second conductive plate 261 is a plate-shaped structure using a hard connection method, and its mechanical strength is relatively high. Compared with direct connection through a wire, the second conductive plate 261 is easy to assemble to the circuit breaker 1, occupies a small space, and is conducive to maintaining the stability of the electrical connection, thereby ensuring that the current flowing through the first contact assembly 22 can stably and smoothly flow to the second contact assembly 23.

[0080] Specifically, refer to Figure 8 , the second conductive plate 261 is only provided as a flat plate, the third connecting portion 262 is provided at the first end of the second conductive plate 261, and the fourth connecting portion 263 is provided at the second end of the second conductive plate 261. The second conductive plate 261 spans between the first static contact 222 and the second static contact 232, and the second conductive plate 261 is located on the side of the first static contact 222 away from contacting the first movable contact 221, and the side of the second static contact 232 away from contacting the second movable contact 231. Compared with the case where the second conductive plate 261 is provided on the side where the first static contact 222 contacts the first movable contact 221, the second conductive plate 261 can be prevented from affecting the contact between the first static contact 222 and the first movable contact 221. Similarly, the second conductive plate 261 can be prevented from affecting the contact between the second static contact 232 and the second movable contact 231, thereby preventing the second conductive plate 261 from affecting the conduction of the first contact assembly 22 and the conduction of the second contact assembly 23, thereby improving the stability of the first passage 2. At the same time, the space occupied can be reduced, which is beneficial to reducing the volume of the circuit breaker 1.

[0081] Reference Figure 8 The third connection portion 262 is disposed at the first end of the second conductive plate 261, and its main function is to connect the first static contact 222 and the second conductive plate 261, so that the current can flow smoothly from the first static contact 222 to the second conductive plate 261. The third connection portion 262 is provided with a connection structure matching the first static contact 222, so that the third connection portion 262 is stably connected to the first static contact 222. Exemplarily, the third connection portion 262 can be fixed to the first static contact 222 by welding, threaded connection or clamping, so as to achieve a stable electrical connection.

[0082] Reference Figure 8The fourth connection part 263 is arranged at the second end of the second conductive plate 261. Its main function is to connect the second conductive plate 261 and the second static contact 232 so that the current can flow smoothly from the second conductive plate 261 to the second static contact 232. The fourth connection part 263 is provided with a connection structure matching the second static contact 232. Similar to the third connection part 262, the fourth connection part 263 should also be fixed to the second static contact 232 by welding, threaded connection or clamping to achieve a stable electrical connection.

[0083] Reference Fig. 9 and Fig.10 In one embodiment, the third connection portion 262 is a first connection hole 2621 provided on the second conductive plate 261, and a corresponding second connection hole 2221 is provided on the first static contact 222. A fastener may be inserted through the connection hole to fixedly connect the third connection portion 262 and the first static contact 222. Similarly, the fourth connection portion 263 is a third connection hole 2631 provided at the second end of the second conductive plate 261, and a corresponding fourth connection hole 2321 is provided on the second static contact 232. The fourth connection portion 263 may also be inserted through the connection hole to fixedly connect the fourth connection portion 263 and the second static contact 232.

[0084] Further, refer to Fig. 9 and Fig.10 Taking the third connection part 262 and the first static contact 222 as an example, the third connection part 262 is provided with two connection holes, which are arranged obliquely. Correspondingly, the first static contact 222 is also provided with two connection holes, which correspond to the connection holes on the third connection part 262 one by one. This arrangement can limit the installation direction of the second conductive plate 261 and the surface of the second conductive plate 261 contacting the first static contact 222. In this way, it is convenient to accurately install the second conductive plate 261 during assembly, so that the smoother surface of the second conductive plate 261 contacts the first static contact 222, which is conducive to improving the stability of the electrical connection between the first static contact 222 and the second static contact 232. The fourth connection part 263 and the second static contact 232 can adopt the same arrangement as above, or different arrangements. For example, the fourth connection part 263 is provided with one connection hole or three connection holes, and the second static contact 232 corresponds to the fourth connection part 263.

[0085] In an optional embodiment, the second conductive plate 261 may also be fixedly connected to the first static contact 222 and the second static contact 232 in other forms. For example, the third connecting portion 262 is connected to the first static contact 222 by welding, and the fourth connecting portion 263 is connected to the second static contact 232 by welding, thereby ensuring the stability of the electrical connection between the second conductive plate 261 and the first static contact 222 and the second static contact 232.

[0086] Reference Fig.11 In some embodiments, the first passage 2 further includes a third connecting member 27 , and the third connecting member 27 electrically connects the second moving contact 231 and the first outlet terminal 24 .

[0087] Based on the above-mentioned embodiments of the present application, the provision of the third connecting member 27 can improve the stability of the electrical connection between the second moving contact 231 and the first outlet terminal 24, so that the current flowing through the second contact assembly 23 can flow out from the first outlet terminal 24 stably and smoothly, further ensuring that the first passage 2 is in a normal state.

[0088] Similar to the first connector 25 and the second connector 26, the third connector 27 can also be configured to electrically connect the second moving contact 231 and the first outlet terminal 24 in a flexible connection or a hard connection. When the flexible connection is used, the third connector 27 can be configured to be a structure such as a wire, and when the hard connection is used, the third connector 27 can be configured to be a structure such as a conductive plate. Specifically, the third connector 27 can be configured to be a component having the characteristics of good electrical conductivity, low contact resistance, high mechanical strength, and wear resistance. For example, the third connector 27 can be configured to be copper, aluminum, or an alloy thereof.

[0089] In some embodiments, reference Figure 3 The first outlet terminal 24 and the first inlet terminal 21 are located on opposite sides of the first contact assembly 22 , and the first outlet terminal 24 is arranged on a side of the first moving contact 221 away from the first stationary contact 222 .

[0090] Based on the above-mentioned embodiments of the present application, the first incoming terminal 21 and the first outgoing terminal 24 are arranged on opposite sides of the first contact assembly 22, so that the first incoming terminal 21 and the first outgoing terminal 24 are located away from the third contact assembly 32, thereby increasing the distance between the first incoming terminal 21 and the second incoming terminal 31, and increasing the distance between the first outgoing terminal 24 and the second outgoing terminal 33, which is beneficial to improving the electrical insulation between the external wiring ports of the circuit breaker 1 and improving the safety of the circuit breaker 1.

[0091] Reference Fig.11 In some embodiments, the third connecting member 27 includes an integrally arranged third conductive plate 271, a first bending portion 272, and a second bending portion 273. The third conductive plate 271 is arranged between the first moving contact 221 and the first outlet terminal 24. The first bending portion 272 is arranged at the first end of the third conductive plate 271, the first bending portion 272 is bent toward the second moving contact 231, and is connected to the second moving contact 231. The second bending portion 273 is arranged at the second end of the third conductive plate 271, the second bending portion is bent toward the first outlet terminal 24, and is connected to the first outlet terminal 24.

[0092] Based on the above-mentioned embodiment of the present application, the third connector 27 formed by the third conductive plate 271, the first bending portion 272 and the second bending portion 273 is simple in structure on the one hand, and on the other hand, the third conductive plate 271 is a plate-shaped structure using a hard connection method, and its mechanical strength is relatively high. Compared with direct connection through a wire, the second conductive plate 261 is easy to assemble to the circuit breaker 1, occupies less space, and is conducive to maintaining the stability of the electrical connection, thereby ensuring that the current flowing through the second contact assembly 23 can stably and smoothly flow to the first outlet terminal 24.

[0093] Specifically, refer to Figure 3 and Fig.11 , the second contact assembly 23 is arranged between the first contact assembly 22 and the third contact assembly 32, and the first outlet terminal 24 is arranged at a position close to the first contact assembly 22, so as to increase the distance between the first outlet terminal 24 and the second outlet terminal 33. Therefore, the third connecting member 27 is arranged to guide the current flowing through the second contact assembly 23 to the first outlet terminal 24, wherein the third conductive plate 271 is located between the first moving contact 221 and the first outlet terminal 24, and the first bending portion 272 is bent from the second moving contact 231 to the position where the third conductive plate 271 is located, so as to realize the electrical connection between the second moving contact 231 and the third conductive plate 271 while reducing the space occupied by the third connecting member 27, similarly, the second bending portion 273 is bent from the third conductive plate 271 to the position where the first outlet terminal 24 is located, so as to realize the electrical connection between the third conductive plate 271 and the first outlet terminal 24, which is also conducive to reducing the space occupied.

[0094] In some embodiments, reference Fig.11 The first passage 2 further includes a first release 28 , and the first release 28 is electrically connected between the first outlet terminal 24 and the second contact assembly 23 .

[0095] Based on the above-mentioned embodiments of the present application, the first release 28 is configured to assist in disconnecting the first path 2 so as to realize the protection function of the circuit breaker 1 on the circuit in which it is located.

[0096] Specifically, refer to Figure 2 and Figure 3 The first release 28 is arranged on a side of the second moving contact 231 away from the second static contact 232, and the first release 28 is connected to the third connection member 27, and is connected to the first outlet terminal 24 through the third connection member 27. When a fault occurs in the circuit where the circuit breaker 1 is located, the first release 28 can control the first moving contact 221 and the first static contact 222 in the first passage 2 to separate, thereby disconnecting the first passage 2.

[0097] In addition, refer to Figure 2 and Figure 3The second passage 3 includes a second release 34, which is arranged on a side of the third moving contact away from the third static contact, and the second release 34 is electrically connected between the second outlet terminal 33 and the third moving contact. When a fault occurs in the circuit where the circuit breaker 1 is located, the second release 34 can control the second moving contact 231 and the second static contact 232 in the second passage 3 to separate, thereby disconnecting the second passage 3.

[0098] In some embodiments, a third release can also be provided in the first passage 2, and the third release is electrically connected between the first moving contact 221 and the second connecting portion 253 of the first connecting member 25. When a fault occurs in the circuit where the circuit breaker 1 is located, the third release can control the first moving contact 221 in the first passage 2 to separate from the first static contact 222, thereby disconnecting the first contact assembly 22.

[0099] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker, characterized in that: include: a first passage and a second passage; The first path includes a first inlet terminal, a first contact assembly, a second contact assembly and a first outlet terminal, the first inlet terminal is electrically connected to the first contact assembly, the first contact assembly is electrically connected to the second contact assembly, and the second contact assembly is electrically connected to the first outlet terminal; The second passage comprises a second inlet terminal, a third contact assembly and a second outlet terminal, wherein the third contact assembly is electrically connected between the second inlet terminal and the second outlet terminal; The second contact assembly is disposed between the first contact assembly and the third contact assembly, and the first outlet end is offset relative to the second contact assembly toward the first contact assembly.

2. The circuit breaker according to claim 1, characterized in that: The first contact assembly includes a first moving contact and a first stationary contact, the second contact assembly includes a second moving contact and a second stationary contact, and the first stationary contact and the second stationary contact are electrically connected; The first inlet terminal is arranged on a side of the first static contact away from the first moving contact, and the first inlet terminal is electrically connected to the first moving contact, and the first outlet terminal is arranged on a side of the first moving contact away from the first static contact, and the first outlet terminal is electrically connected to the second moving contact.

3. The circuit breaker according to claim 2, characterized in that: The first passage further includes a first connecting member, and the first connecting member electrically connects the first incoming terminal and the first moving contact.

4. The circuit breaker according to claim 3, characterized in that: The first connecting member includes an integrally arranged first conductive plate, a first connecting portion, and a second connecting portion, wherein the first connecting portion is arranged at a first end of the first conductive plate, the first connecting portion is connected to the first incoming line terminal, the second connecting portion is arranged at a second end of the first conductive plate, the second connecting portion is connected to the first moving contact, and the first conductive plate is arranged on a side of the first contact assembly away from the second contact assembly.

5. The circuit breaker according to claim 2, characterized in that: The first path further includes a second connecting member, and the second connecting member electrically connects the first stationary contact and the second stationary contact.

6. The circuit breaker according to claim 5, characterized in that: The second connecting member includes a second conductive plate, a third connecting portion and a fourth connecting portion which are integrally arranged, wherein the third connecting portion is arranged at the first end of the second conductive plate, the third connecting portion is connected to the first static contact, and the fourth connecting portion is arranged at the second end of the second conductive plate, and the fourth connecting portion is connected to the second static contact.

7. The circuit breaker according to claim 2, characterized in that: The first passage further includes a third connecting member, and the third connecting member electrically connects the second moving contact and the first outlet terminal.

8. The circuit breaker according to claim 7, characterized in that: The first outlet terminal and the first inlet terminal are located on two opposite sides of the first contact assembly, and the first outlet terminal is arranged on a side of the first moving contact away from the first stationary contact.

9. The circuit breaker according to claim 8, characterized in that The third connecting member comprises a third conductive plate, a first bending portion and a second bending portion which are integrally arranged, and the third conductive plate is arranged between the first moving contact and the first outlet terminal; The first bending portion is arranged at the first end of the third conductive plate, the first bending portion is bent toward the second moving contact and is connected to the second moving contact, the second bending portion is arranged at the second end of the third conductive plate, the second bending portion is bent toward the first output terminal and is connected to the first output terminal.

10. The circuit breaker according to claim 1, characterized in that The first passage further includes a first release, and the first release is electrically connected between the first outlet terminal and the second contact assembly.

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