Quick closing mechanism and circuit breaker

Abstract

The utility model provides a quick-closing mechanism and a circuit breaker, and relates to the technical field of low-voltage electrical appliances, the quick-closing mechanism comprises a handle rotatably installed on a shell, a moving contact assembly and a quick-closing piece, the rotation center of the quick-closing piece is located between the rotation center of the handle and the rotation center of the moving contact assembly, and the space between the handle and the moving contact assembly is fully utilized. Therefore, the space of the whole structure is effectively saved. The moving contact assembly comprises a moving contact and an energy storage assembly which are coaxially and rotatably arranged on the shell, and the handle is in driving fit with the moving contact through the energy storage assembly. The handle drives the moving contact to rotate towards the closing direction through the energy storage assembly so as to abut against the quick closing piece, the energy storage assembly continues to be driven to store energy, after the quick closing piece is driven by the handle, abutting between the quick closing piece and the moving contact is relieved, the energy storage assembly releases energy and drives the moving contact to continue to rotate towards the closing direction, and therefore quick closing of the moving contact and the static contact is achieved. And the reliability and the safety of the circuit breaker are effectively improved.

Description

Technical Field

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

[0002] A circuit breaker is a switching device used in electrical circuits. Its primary function is to close, carry, and interrupt current. In power systems, the core role of circuit breakers is to provide overload protection, short-circuit protection, and undervoltage protection, ensuring the safety of electrical equipment and personnel. When a short circuit or overcurrent occurs, the circuit breaker quickly disconnects the circuit, preventing damage to electrical equipment and potentially hazardous situations such as electric shock and fire. This not only effectively protects equipment but also ensures the safety of life and property. Furthermore, circuit breakers provide protection for power lines and asynchronous motors, ensuring stable circuit operation even when the motor is infrequently started. More importantly, when a severe overload, short circuit, or undervoltage fault occurs, the circuit breaker automatically disconnects the circuit, preventing further damage and ensuring safe and reliable system operation.

[0003] With the development of modern electrical systems, circuit breakers have become widely used in the electrical systems of residential, commercial, and industrial buildings. However, the closing speed of the moving and static contacts of most circuit breakers currently on the market is affected by manual operation, resulting in a slow closing process or incomplete closing. This situation may cause the distance between the contacts to be too close, which may cause breakdown discharge problems, and the contacts may not close in time. This not only increases contact wear but may also cause serious safety accidents. To address this problem, some new circuit breakers have added a quick-closing structure to increase the closing speed. However, the quick-closing structure requires internal space within the circuit breaker, affecting the overall layout of other components, resulting in an increase in the overall size of the circuit breaker and failing to meet the requirements for compactness and miniaturization of circuit breakers. Utility Model Content

[0004] The purpose of this application is to provide a quick closing mechanism and a circuit breaker to address the deficiencies in the above-mentioned prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In one aspect of an embodiment of the present application, a quick-closing mechanism is provided, comprising a handle rotatably mounted on a housing, a movable contact assembly, and a quick-closing member, wherein the rotation center of the quick-closing member is located between the rotation center of the handle and the rotation center of the movable contact assembly, the movable contact assembly comprising a movable contact rotatably mounted on the housing and an energy storage assembly, and the handle is driven to engage with the movable contact via the energy storage assembly;

[0007] The handle drives the moving contact to rotate toward the closing direction through the energy storage component to abut against the quick closing part, and the energy storage component continues to be driven to store energy. After the quick closing part is driven by the handle and releases the abutment with the moving contact, the energy storage component releases energy and drives the moving contact to continue rotating toward the closing direction.

[0008] Optionally, the rotation center of the quick-clamp is located within a rectangular area with the line connecting the rotation center of the handle and the rotation center of the moving contact assembly as the diagonal line, the horizontal distance between the rotation center of the handle and the rotation center of the moving contact assembly is equal to the length of one side of the rectangular area, and the vertical distance between the rotation center of the handle and the rotation center of the moving contact assembly is equal to the length of the other side of the rectangular area.

[0009] Optionally, a first abutting portion is provided at a position of the moving contact close to the rotation center thereof, and the first abutting portion is used to abut against the quick-closing member.

[0010] Optionally, the moving contact and the energy storage assembly are coaxially rotatably arranged on the shell, the energy storage assembly includes a mounting seat rotatably mounted on the shell and an elastic member mounted on the mounting seat, and a second abutment portion is provided on the quick-connect member, the second abutment portion is used to abut against the elastic member.

[0011] Optionally, an end portion of the quick-connect member overlaps the fixed portion or mounting seat of the housing, and the elastic member is used to provide an overlapping force so that the quick-connect member tends to overlap the fixed portion or mounting seat of the housing.

[0012] Optionally, the end of the quick-connect member overlaps the mounting seat, the mounting seat has an arc surface, the center of the arc surface coincides with the rotation center of the mounting seat, and the end of the quick-connect member overlaps the arc surface.

[0013] Optionally, when the moving contact is driven to rotate toward the opening direction, the elastic member is further used to provide a reset force so that the quick closing member has a tendency to rotate toward the opening direction.

[0014] Optionally, the elastic member is a return spring or a contact spring.

[0015] Optionally, a third abutting portion is provided on the handle, and the handle is used to drive the quick-close member to release the abutment with the moving contact via the third abutting portion.

[0016] Optionally, the quick-closing mechanism further includes a connecting rod, and the handle is driven to cooperate with the energy storage assembly via the connecting rod.

[0017] In another aspect of an embodiment of the present application, a circuit breaker is provided, comprising a housing, a static contact, and any one of the above-mentioned quick-closing mechanisms, wherein the static contact and the quick-closing mechanism are mounted on the housing, and the moving contact of the quick-closing mechanism is driven to rotate to close or open the circuit breaker with the static contact.

[0018] The beneficial effects of this application include:

[0019] The present application provides a quick-closing mechanism, including a handle rotatably mounted on a housing, a moving contact assembly, and a quick-closing member. The rotation center of the quick-closing member is located between the rotation center of the handle and the rotation center of the moving contact assembly. The quick-closing member itself is relatively small in size and fully utilizes the space between the handle and the moving contact assembly, thereby effectively saving space in the overall structure. The moving contact assembly includes a moving contact rotatably mounted on the housing and an energy storage assembly. The handle is driven by the energy storage assembly and the moving contact. When the handle is operated, the handle can drive the moving contact to rotate in the closing direction through the energy storage assembly and abut against the quick-closing member. During this process, the energy storage assembly begins to store energy. After the moving contact abuts against the quick-closing member, the abutment of the quick-closing member prevents the moving contact from continuing to rotate, so that the moving contact remains stationary, while the energy storage assembly continues to rotate and stores energy under the drive of the handle. When the handle is rotated to cooperate with the quick-closing part, the quick-closing part will be driven by the handle to rotate, thereby releasing the contact with the moving contact. In this process, the energy storage component releases the energy previously accumulated, quickly driving the moving contact to continue rotating in the closing direction, thereby achieving rapid closing with the static contact, effectively improving the reliability and safety of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a quick-closing mechanism provided in an embodiment of the present application, wherein the moving contact is in an open position;

[0022] Figure 2 A schematic structural diagram of a quick-closing mechanism according to an embodiment of the present application in which a quick-closing member and a moving contact abut against each other;

[0023] Figure 3 A schematic diagram of the structure of the quick-closing member and the handle of a quick-closing mechanism provided in an embodiment of the present application;

[0024] Figure 4 A schematic structural diagram of a quick-closing mechanism provided in an embodiment of the present application wherein a quick-closing member and a moving contact are released from abutment;

[0025] Figure 5 A schematic structural diagram of a moving contact of a quick closing mechanism in a closed position provided in an embodiment of the present application;

[0026] Figure 6 A schematic structural diagram of a moving contact assembly provided in an embodiment of the present application;

[0027] Figure 7 A schematic structural diagram of a moving contact provided in an embodiment of the present application;

[0028] Figure 8 One of the structural schematic diagrams of an energy storage component provided in an embodiment of the present application;

[0029] Figure 9 The second structural diagram of an energy storage component provided in an embodiment of the present application;

[0030] Figure 10 A schematic structural diagram of a quick-close component provided in an embodiment of the present application;

[0031] Figure 11 This is one of the structural diagrams of a handle provided in an embodiment of the present application;

[0032] Figure 12 This is a second structural schematic diagram of a handle provided in an embodiment of the present application.

[0033] Icon: 10-handle; 10a-first mounting slot; 11-third abutment portion; 20-moving contact assembly; 21-moving contact; 211-first abutment portion; 22-energy storage assembly; 221-mounting seat; 221a-second mounting slot; 222-elastic member; 30-quick-closing member; 31-second abutment portion; 40-connecting rod; 51-first mounting axis; 52-second mounting axis; 53-third mounting axis; 2-housing; 3-static contact. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] 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 as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0036] 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, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0039] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] Circuit breakers are critical switching devices in power systems. Their primary functions include providing overload protection, short-circuit protection, and undervoltage protection, ensuring the safety of electrical equipment and personnel. The increasing diversification of modern electrical system applications has placed higher demands on the size and performance of circuit breakers.

[0041] Currently, the closing speed of the moving and static contacts of many circuit breakers on the market is affected by manual operation, which can lead to slow or incomplete closing, causing breakdown discharge and contact wear, posing a serious safety hazard. Although new circuit breakers increase closing speed by adding fast-closing structures, this often results in larger devices, failing to meet the requirements of compactness and miniaturization. Therefore, optimizing the structural design to achieve miniaturization while maintaining circuit breaker performance has become a major challenge in current technological development.

[0042] In view of the above problems, one aspect of the embodiments of the present application provides a quick closing mechanism, which can be applied in a circuit breaker, such as Figures 1 to 5As shown, the quick-closing mechanism includes a handle 10 rotatably mounted on the housing 2 of the circuit breaker, a moving contact assembly 20, and a quick-closing member 30. The handle 10 drives the moving contact assembly 20 to rotate, and through the cooperation of the quick-closing member 30, the moving contact assembly 20 can quickly close with the static contact 3 of the circuit breaker.

[0043] Specifically, if Figures 1 to 5 As shown, the rotation center of the quick-close member 30 is located between the rotation center of the handle 10 and the rotation center of the movable contact assembly 20. The quick-close member 30 itself is relatively small in size and fully utilizes the space between the handle 10 and the movable contact assembly 20, thereby effectively saving space in the overall structure. Figure 6 As shown, the moving contact assembly 20 includes a moving contact 21 and an energy storage assembly 22 rotatably disposed on the housing 2, and the handle 10 is driven and engaged by the energy storage assembly 22 and the moving contact 21. Figure 1 As shown, the moving contact 21 is in the open position. Figure 2 As shown, when the handle 10 is operated, the handle 10 can drive the moving contact 21 to rotate in the closing direction through the energy storage component 22 and abut against the quick closing component 30. During this process, the energy storage component 22 starts to store energy. After the moving contact 21 abuts against the quick closing component 30, the quick closing component 30 applies a force to the moving contact 21 to rotate in the opening direction, while the energy storage component 22 applies a force to the moving contact 21 to continue rotating in the closing direction. The two forces are balanced, so that the moving contact 21 remains stationary, while the energy storage component 22 continues to rotate and store energy under the drive of the handle 10. Figures 3 to 5 As shown, when the handle 10 is rotated to cooperate with the quick-closing member 30, the quick-closing member 30 will be driven by the handle 10 to rotate, thereby releasing the contact with the moving contact 21. During this process, the energy storage component 22 releases the energy previously accumulated, quickly driving the moving contact 21 to continue rotating in the closing direction, thereby achieving rapid closing with the static contact 3, effectively improving the reliability and safety of the circuit breaker.

[0044] In summary, the quick-closing mechanism provided in this application not only enables rapid closing of the circuit breaker, but also effectively reduces the space occupied by the quick-closing member 30, thereby enhancing the compactness and applicability of the circuit breaker. This design allows the circuit breaker to provide higher performance within a smaller space, particularly in electrical systems requiring fast response and high-density deployment, where this quick-closing mechanism offers significant advantages.

[0045] Alternatively, as Figures 1 to 5As shown, the handle 10 is rotatably mounted on the housing 2 via the first mounting axis 51, the quick-close component 30 is rotatably mounted on the housing 2 via the second mounting axis 52, and the moving contact assembly 20 is rotatably mounted on the housing 2 via the third mounting axis 53. The handle 10 is fixed to the housing 2 via the first mounting axis 51 and is allowed to rotate around this axis to achieve different operating states. The quick-close component 30 is connected to the housing 2 via the second mounting axis 52, so that the quick-close component 30 can rotate on this axis to achieve interaction with the moving contact assembly 20 and the handle 10. The moving contact assembly 20 is connected to the housing 2 via the third mounting axis 53, so that it can rotate on this axis to achieve closing and opening actions of the contacts. The design of the three mounting axes ensures the coordinated work between the various components while avoiding mutual interference.

[0046] Optionally, the rotation center of the quick-close member 30 is located within a rectangular area with the line connecting the rotation centers of the handle 10 and the movable contact assembly 20 as the diagonal line. The horizontal distance between the rotation centers of the handle 10 and the movable contact assembly 20 is equal to the length of one side of the rectangular area, and the vertical distance between the rotation centers of the handle 10 and the movable contact assembly 20 is equal to the length of the other side of the rectangular area. This arrangement not only rationally utilizes space but also effectively avoids interference between structures.

[0047] Specifically, if the rotation center of the quick-clamp member 30 is located on this diagonal line, its length will be relatively short. This design allows the quick-clamp member 30 to be arranged more compactly within the housing 2, thereby saving space in the overall structure. This feature is particularly suitable for electrical equipment that requires a compact design. By reducing the length of the quick-clamp member 30, the entire quick-clamp mechanism minimizes its footprint while ensuring functionality.

[0048] Furthermore, when the rotation center of the quick-close member 30 is located on or above the diagonal, its structural design not only utilizes the upper space of the circuit breaker but also leaves ample room for other key components below. In particular, when the rotation center of the quick-close member 30 is located above the diagonal, the upper space is fully utilized. This design not only conserves lower space but also effectively prevents interference between the quick-close member 30 and the tripping mechanism, arc extinguishing mechanism, and circuitry below. This space-optimized design ensures independent operation of each component and reduces the potential risk of failure due to interference.

[0049] Overall, this optimized design significantly improves the circuit breaker's compactness, allowing it to fit into smaller installation spaces without compromising performance. Furthermore, the reduced structural interference significantly reduces the risk of failure during operation, further enhancing the circuit breaker's safety and reliability. Therefore, while meeting miniaturization requirements, this design also ensures efficient and stable operation, making it suitable for a variety of electrical systems with stringent space and performance requirements.

[0050] Optionally, a protruding first abutting portion 211 is provided at a position close to the rotation center of the moving contact 21 , and the first abutting portion 211 is used to abut against the quick closing member 30 to ensure the stability and accuracy of the moving contact 21 during the closing process.

[0051] Specifically, if Figure 6 and Figure 7 As shown, the provision of the first abutment portion 211 enables the moving contact 21 to make precise mechanical contact with the quick-closing member 30 during rotation. This abutment relationship is crucial for controlling the rotation path of the moving contact 21. When the handle 10 is operated to drive the energy storage assembly 22, the moving contact 21 begins to rotate in the closing direction. During this process, the first abutment portion 211 on the moving contact 21 contacts the quick-closing member 30, forming a stable mechanical fulcrum. This mechanical fulcrum ensures that the moving contact 21 can remain stationary when the handle 10 drives the energy storage assembly 22 to continue rotating.

[0052] In addition, the first abutment portion 211 is arranged at a position close to the rotation center of the moving contact 21. On the one hand, since this position is closer to the quick-close member 30, the quick-close member 30 can contact the moving contact 21 more directly and efficiently, thereby providing more reliable mechanical support during the closing process. Through this design, the quick-close member 30 does not have to cross a large distance to abut against the moving contact 21, which reduces the potential deviation of the moving contact 21 during the rotation process and ensures the stability and accuracy of the entire system. On the other hand, the position close to the rotation center shortens the distance between the first abutment portion 211 and the quick-close member 30, directly reducing the length required for the quick-close member 30. This optimization not only makes the design of the quick-close member 30 more compact, but also reduces the space occupied by the quick-close member 30 in the entire device, thereby improving the overall compactness of the circuit breaker.

[0053] In general, the first abutment portion 211 provided near the rotation center of the moving contact 21 makes the mechanical connection between the quick-close member 30 and the moving contact 21 more stable, reducing the risk of malfunction due to vibration or external interference. In addition, since the distance between the first abutment portion 211 and the quick-close member 30 is shorter, the movement of the moving contact 21 can be faster and more stable, further improving the operating efficiency and response speed of the circuit breaker.

[0054] Optionally, the moving contact 21 and the energy storage assembly 22 are coaxially rotatably arranged in the housing 2, which can save space and facilitate the driving effect of the energy storage assembly 22 on the moving contact 21. The energy storage assembly 22 includes a mounting seat 221 rotatably mounted on the housing 2 and an elastic member 222 mounted on the mounting seat 221. One end of the elastic member 222 is tightly abutted against the mounting seat 221. A second abutting portion 31 is provided on the quick-close member 30, and the second abutting portion 31 is used to abut against the other end of the elastic member 222. The fixed relationship between the quick-close member 30 and the elastic member 222, through the design of the second abutting portion 31, makes the mechanical transmission during the entire operation process smoother, reducing energy loss and operational errors.

[0055] Specifically, if Figures 8 to 10 As shown, when the handle 10 drives the mounting seat 221 to rotate in the closing direction, one end of the elastic member 222 is displaced. At this time, since the quick-closing member 30 remains stationary, the other end of the elastic member 222 is also in a fixed state. The elastic member 222 is deformed under the action of forces at both ends. The deformation of the elastic member 222 is a process of energy storage. By compressing or stretching the elastic member 222, the mechanical energy generated by the operation of the handle 10 can be stored in the elastic member 222, ensuring that in subsequent operations, the elastic member 222 can quickly release energy, pushing the moving contact 21 to contact the static contact 3 at a higher speed and with greater force, thereby achieving rapid closing.

[0056] The elastic member 222 can be designed in a variety of forms, such as a compression spring, a tension spring, or a torsion spring. This diverse design option allows for further optimization of the quick-closing mechanism. Regardless of the type of elastic member 222 chosen, it must ensure that it can provide sufficient force at the appropriate time to quickly push the movable contact 21 to complete operation and can quickly reset when no longer needed.

[0057] Optionally, a third abutment portion 11 is provided on the handle 10 , and the handle 10 is used to drive the quick closing member 30 via the third abutment portion 11 at an appropriate time to release the abutment with the moving contact 21 , thereby releasing the elastic force and realizing rapid closing of the moving contact 21 .

[0058] Specifically, if Figure 11 and Figure 12As shown, when the handle 10 starts to rotate, it first drives the moving contact 21 to rotate in the closing direction until the moving contact 21 abuts against the quick-closing part 30. At this time, the moving contact 21 stops rotating further due to the resistance of the quick-closing part 30, forming a temporary static state, which prepares for subsequent actions. As the handle 10 continues to rotate, the third abutment 11 gradually contacts the quick-closing part 30. The third abutment 11 will apply enough force to push the quick-closing part 30 to start rotating. The rotational movement of the quick-closing part 30 releases its abutment with the moving contact 21. At this time, the moving contact 21 is no longer restricted by the resistance of the quick-closing part 30. In this case, the energy of the elastic part 222 in the energy storage component 22 will be released rapidly, pushing the moving contact 21 to complete the closing operation at an extremely fast speed.

[0059] In summary, the design of the third abutment 11 significantly improves the closing speed and operational accuracy of the moving contact 21. By rotating the handle 10, the third abutment 11 can accurately trigger the action of the quick-closing member 30, ensuring that the energy in the energy storage assembly 22 is released at the appropriate time, thereby driving the moving contact 21 to close quickly. This fast and precise operation greatly reduces the risk of poor contact between the contacts, while also improving the overall safety and stability of the circuit breaker. Furthermore, because this design reduces time delays during the closing process, the circuit breaker can respond more quickly and effectively when protecting the electrical system from faults such as overloads and short circuits.

[0060] Optionally, the elastic member 222 is a reset spring or a contact spring. In the design of a quick-closing mechanism, the placement and function of the reset spring and contact spring are crucial for efficient circuit breaker operation. By properly utilizing these two springs, not only can the circuit breaker's opening and closing processes be optimized, but the overall structure can also be simplified, achieving higher operating efficiency and saving material costs.

[0061] Specifically, the reset spring provides the necessary opening force during the opening process. Specifically, when the handle 10 drives the mounting base 221 to rotate the movable contact 21 in the opening direction, the reset spring applies additional force, enabling the movable contact 21 to complete the opening action more quickly and easily. The reset spring design ensures that the operating force required is effectively compensated throughout the opening process, making the opening process more labor-efficient and improving the circuit breaker's response speed.

[0062] The contact spring is primarily used to apply force to the movable contact 21, maintaining close contact with the mounting base 221. This contact is crucial because it ensures that the handle 10 can effectively drive the movable contact 21 through the mounting base 221 to complete the closing or opening operation. The presence of the contact spring not only ensures good contact between the movable contact 21 and the stationary contact 3, but also ensures the stability and accuracy of the movable contact 21 throughout the entire operation process.

[0063] The reset spring or contact spring can cooperate with the quick-closing member 30 to achieve the quick-closing function. This means that by properly designing the configuration of the elastic member 222, the force of both the reset spring and the contact spring can be utilized to achieve rapid closing of the movable contact 21. This design flexibility provides diverse solutions for different circuit breaker application scenarios.

[0064] Notably, through the rational design of mounting base 221, the reset spring and contact spring can be combined into a single spring. This innovative design means that the entire quick-close mechanism only requires a single spring to achieve both reset and quick-close functions, effectively driving movable contact 21 via mounting base 221. This simplification not only reduces the number of springs, lowering production costs, but also simplifies the coordination between the spring and other components, making the entire system more compact and easier to maintain.

[0065] In summary, the rational arrangement and integration of the reset spring and contact spring not only optimizes the circuit breaker's operation but also simplifies the structural design and reduces the number of components. This innovative design improves system efficiency and reliability while also providing a concise and effective solution for future quick-close mechanism designs.

[0066] Optionally, when the moving contact 21 is driven to rotate toward the opening direction, the elastic member 222 is further used to provide a reset force so that the quick-closing member 30 has a tendency to rotate toward the opening direction.

[0067] Specifically, the elastic member 222 always applies a force in the opening direction to the quick-closing member 30 by contacting the second abutting portion 31 of the quick-closing member 30. The existence of this force makes the quick-closing member 30 tend to rotate in the opening direction during the entire operation. When the quick-closing member 30 abuts the moving contact 21, the moving contact 21 will apply a force in the closing direction, offsetting the force applied by the elastic member 222, forming a two-force balance, so that the quick-closing member 30 remains stationary. This balanced state is broken when the handle 10 rotates and abuts against the quick-closing member 30. The closing direction force applied by the handle 10 on the quick-closing member 30 exceeds the reset force of the elastic member 222, pushing the quick-closing member 30 to rotate in the closing direction. As the quick-closing member 30 rotates, the handle 10 and the moving contact 21 gradually release the abutment with the quick-closing member 30, and finally the moving contact 21 quickly closes with the static contact 3.

[0068] When the movable contact 21 is driven by the handle 10 to rotate in the opening direction, the quick-close member 30 is only subjected to the force of the elastic member 222. Without interference from other forces, the quick-close member 30, driven by the elastic member 222, can quickly move in the opening direction and reset. This quick-reset design ensures that the quick-close member 30 reliably resets after each operation, ready for the next one.

[0069] In summary, the continuous force exerted by the elastic member 222 on the quick-closing member 30, coupled with the mechanical balance between the handle 10, the movable contact 21, and the elastic member 222, enables efficient closing and opening operations. The elastic member 222 not only provides a reset force for the movable contact 21 but also enables the quick-closing member 30 to quickly return to its initial position. This design optimizes circuit breaker operating efficiency, enhances system stability and reliability, and provides a crucial guarantee for the safe operation of electrical equipment.

[0070] Optionally, the end of the quick-close member 30 overlaps the fixed portion or mounting seat 221 of the housing 2 , and the elastic member 222 is used to provide an overlapping force to make the quick-close member 30 tend to overlap the fixed portion or mounting seat 221 of the housing 2 .

[0071] Specifically, the end of the quick-clamping member 30 contacts the fixed portion or mounting seat 221 of the shell 2 in an overlapping manner to form a stable connection relationship, and the role of the elastic member 222 is to provide the necessary overlapping force to ensure that the quick-clamping member 30 can always be subjected to the overlapping force when it is in its initial position, ensuring that the quick-clamping member 30 can be firmly overlapped on the fixed portion or mounting seat 221 of the shell 2, thereby maintaining the stability of the quick-clamping member 30 and providing the necessary conditions for the energy storage of the elastic member 222.

[0072] Optionally, the end of the quick-close member 30 overlaps the mounting seat 221 , the mounting seat 221 has an arc surface, the center of the arc surface coincides with the rotation center of the mounting seat 221 , and the end of the quick-close member 30 overlaps the arc surface.

[0073] Specifically, if Figure 1 As shown, the arcuate surface of the mounting base 221 provides an ideal contact surface for the quick-close member 30. This structural design allows the quick-close member 30 to accurately contact the arcuate surface of the mounting base 221 without adding additional fixings to the circuit breaker housing 2. This not only simplifies the overall structure but also reduces the complexity of manufacturing and assembly. The arcuate surface design of the mounting base 221 ensures stable contact between the quick-close member 30 and the mounting base 221 during rotation while preventing interference with other components of the mounting base 221.

[0074] Furthermore, by aligning the center of the arc surface with the rotation center of the mounting base 221, the quick-connect member 30 can fully rely on the support provided by the arc surface during the overlap, without placing any additional burden on the rotation of the mounting base 221. Furthermore, because the contact area between the quick-connect member 30 and the arc surface is evenly distributed, this design also helps reduce friction and wear that may occur during operation, thereby improving the reliability and durability of the system.

[0075] Overall, the arc-shaped design of mounting base 221 not only simplifies the structure and reduces the need for additional fixing parts, but also improves the joint stability of quick-close member 30 and the rotational flexibility of mounting base 221. Ultimately, this design not only improves the overall performance of the circuit breaker, but also ensures its stable and reliable operation in various electrical systems.

[0076] Optionally, the quick-closing mechanism further includes a connecting rod 40 , and the handle 10 is driven to cooperate with the energy storage assembly 22 via the connecting rod 40 .

[0077] Specifically, if Figures 1 to 5 As shown, the connecting rod 40 in the quick-clamp mechanism is a key component for transmitting driving force between the handle 10 and the energy storage assembly 22. By connecting the handle 10 and the mounting base 221, the connecting rod 40 ensures that rotation of the handle 10 effectively drives the mounting base 221 and its associated components to perform corresponding movements. In this embodiment of the present application, a first mounting slot 10a is provided in the handle 10, and a second mounting slot 221a is provided in the mounting base 221. The first mounting slot 10a on the handle 10 and the second mounting slot 221a on the mounting base 221 are used to secure and guide the connecting rod 40. The ends of the connecting rod 40 are respectively inserted into the first mounting slot 10a and the second mounting slot 221a, allowing the connecting rod 40 to stably connect the handle 10 and the mounting base 221. This structural design not only ensures the stability of the connecting rod 40, but also effectively reduces motion errors caused by component play or looseness. Through the precisely machined mounting slots, the connecting rod 40 can achieve smooth transmission between the mounting base 221 and the handle 10, ensuring accuracy and reliability during the driving process.

[0078] Another aspect of the present application provides a circuit breaker, comprising a housing 2, a static contact 3, and any of the aforementioned quick-closing mechanisms. The static contact 3 and the quick-closing mechanism are mounted on the housing 2, and a movable contact 21 of the quick-closing mechanism is driven to rotate to close or open the circuit breaker with the static contact 3. Because the circuit breaker employs the aforementioned quick-closing mechanism, it also has the same beneficial effects as the quick-closing mechanism, and thus will not be further described herein.

[0079] Optionally, the circuit breaker further comprises a tripping mechanism and an arc extinguishing mechanism. The tripping mechanism is used to automatically disconnect the circuit when the current exceeds a set range, while the arc extinguishing mechanism is used to quickly extinguish the arc when the circuit is disconnected.

[0080] The present application also provides a power distribution device equipped with the aforementioned circuit breaker. The power distribution device can be equipped with at least one of the following: a distribution box, cables, a distribution cabinet, a motor, a switch and socket, a lamp, an air conditioner, an electric water heater, an electric meter, a camera, a telephone, a computer, etc. Such power distribution equipment can utilize the circuit breaker structure of the present application to achieve intelligent management, but is not limited to the above-mentioned intelligently managed power distribution equipment and can also be used in non-intelligent power distribution equipment in traditional industries.

[0081] Optionally, the embodiments of the present application can be used for: fire-fighting electricity: fire control room, fire pumps, smoke exhaust facilities, fire elevators and their drainage pumps, fire emergency lighting, etc. at level one; aisle lighting, duty lighting, guard lighting, obstacle sign lights; rail transit; security system power supply; electronic information room power supply; passenger elevator power; sewage pump; variable frequency speed regulation constant pressure water supply and domestic pump (otherwise a secondary load); main offices, conference rooms, general duty rooms, and archives rooms.

[0082] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A quick-closing mechanism, characterized in that: The invention comprises a handle (10) rotatably mounted on a housing (2), a moving contact assembly (20), and a quick-engaging member (30); the rotation center of the quick-engaging member (30) is located between the rotation center of the handle (10) and the rotation center of the moving contact assembly (20); the moving contact assembly (20) comprises a moving contact (21) rotatably mounted on the housing (2) and an energy storage assembly (22); the handle (10) is driven to engage with the moving contact (21) via the energy storage assembly (22); The handle (10) drives the moving contact (21) to rotate toward the closing direction via the energy storage component (22) to abut against the quick-closing member (30), and the energy storage component (22) continues to be driven to store energy. After the quick-closing member (30) is driven by the handle (10) and releases the abutment with the moving contact (21), the energy storage component (22) releases energy and drives the moving contact (21) to continue rotating toward the closing direction.

2. The quick-closing mechanism according to claim 1, characterized in that: The rotation center of the quick-close member (30) is located in a rectangular area with the line connecting the rotation center of the handle (10) and the rotation center of the moving contact assembly (20) as a diagonal line, the horizontal distance between the rotation center of the handle (10) and the rotation center of the moving contact assembly (20) is equal to the length of one side of the rectangular area, and the vertical distance between the rotation center of the handle (10) and the rotation center of the moving contact assembly (20) is equal to the length of the other side of the rectangular area.

3. The quick-closing mechanism according to claim 1 or 2, characterized in that: A first abutting portion (211) is provided at a position of the moving contact (21) close to its rotation center, and the first abutting portion (211) is used to abut against the quick-connect member (30).

4. The quick-closing mechanism according to claim 1 or 2, characterized in that: The moving contact (21) and the energy storage assembly (22) are coaxially rotatably arranged on the housing (2); the energy storage assembly (22) comprises a mounting seat (221) rotatably mounted on the housing (2) and an elastic member (222) mounted on the mounting seat (221); a second abutting portion (31) is provided on the quick-connect member (30); the second abutting portion (31) is used to abut against the elastic member (222).

5. The quick-closing mechanism according to claim 4, characterized in that: The end of the quick-connect member (30) overlaps the fixed portion of the housing (2) or the mounting seat (221), and the elastic member (222) is used to provide an overlapping force so that the quick-connect member (30) has a tendency to overlap the fixed portion of the housing (2) or the mounting seat (221).

6. The quick-closing mechanism according to claim 5, characterized in that: The end of the quick-connect member (30) overlaps the mounting seat (221), the mounting seat (221) has an arc surface, the center of the circle corresponding to the arc surface coincides with the rotation center of the mounting seat (221), and the end of the quick-connect member (30) overlaps the arc surface.

7. The quick-closing mechanism according to claim 4, characterized in that: When the moving contact (21) is driven to rotate toward the opening direction, the elastic member (222) is also used to provide a reset force to enable the quick-closing member (30) to have a tendency to rotate toward the opening direction.

8. The quick-closing mechanism according to claim 4, characterized in that: The elastic member (222) is a return spring or a contact spring.

9. The quick-closing mechanism according to claim 1 or 2, characterized in that: A third abutting portion (11) is provided on the handle (10), and the handle (10) is used to drive the quick-close member (30) to release the abutment with the moving contact (21) via the third abutting portion (11).

10. A circuit breaker, characterized in that: The invention comprises a housing (2), a static contact (3) and a quick closing mechanism according to any one of claims 1 to 9, wherein the static contact (3) and the quick closing mechanism are mounted on the housing (2), and the moving contact (21) of the quick closing mechanism is driven to rotate to close or open the circuit breaker with the static contact (3).

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