Circuit breaker

Abstract

The invention provides a circuit breaker, and relates to the technical field of low-voltage electrics. The circuit breaker comprises a handle, a mechanism body, a moving contact, an energy storage structure and a first elastic piece arranged between the mechanism body and the moving contact. The mechanism body can rotate around an axis, the moving contact is hinged to the mechanism body, and the hinged position is located on the side, facing the static contact, of the rotating axis of the mechanism body. The handle is connected with the mechanism body through a connecting piece, and the handle is used for driving the mechanism body to rotate so as to drive the moving contact to rotate, so that the moving contact and the static contact are contacted for closing or separated for opening. The energy storage structure is connected with the handle and can be driven by the handle to rotate; during closing, the energy storage structure is abutted against the moving contact when rotating to a first preset angle, so that the first elastic piece is compressed to store energy, and is separated from the moving contact when rotating to a second preset angle, so that the first elastic piece releases the stored energy, the moving contact quickly rotates towards the static contact, a large opening distance is realized, an arc stretching space is expanded, and the arc extinguishing speed is accelerated. The breaking capacity of the circuit breaker is improved, and electricity utilization safety is guaranteed.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more particularly to a circuit breaker. Background Technology

[0002] The circuit breaker includes a housing and a stationary contact, an operating mechanism, and a moving contact disposed within the housing. The stationary contact is fixed in a preset position. The operating mechanism is rotatably connected to the housing, and the moving contact is hinged to the rotating shaft of the operating mechanism. The operating mechanism is used to drive the moving contact to rotate, so that the moving contact and the stationary contact make contact to achieve closing, or to separate the moving contact and the stationary contact to achieve opening.

[0003] During operation, when a large fault current occurs in the circuit, the moving contact, under the action of electric repulsion, will quickly rotate away from the stationary contact, creating a safe distance (opening gap) between the moving and stationary contacts, thus tripping the circuit breaker. However, in related technologies, the arc-ignition path of the circuit breaker is limited, and arc extinguishing is difficult, resulting in insufficient breaking capacity and affecting electrical safety. Summary of the Invention

[0004] This application provides a circuit breaker that increases the opening distance of the circuit breaker, extends the arc ignition path, expands the arc stretching space, makes the arc easier to be stretched, cooled and deionized, thereby accelerating the arc extinguishing speed, improving the breaking capacity of the circuit breaker, and thus ensuring electrical safety.

[0005] This application provides a circuit breaker, including a handle, a mechanism body, a moving contact, an energy storage structure, and a first elastic element.

[0006] The mechanism body is rotatable about an axis. The moving contact is hinged to the mechanism body, and the hinge position is located on the side of the mechanism body's rotation axis facing the stationary contact of the circuit breaker. A first elastic element is disposed between the mechanism body and the moving contact. A handle is located on one side of the mechanism body and connected to the mechanism body via a connector. The handle is used to drive the mechanism body to rotate, thereby causing the moving contact to rotate, so that the moving contact contacts the stationary contact to close the circuit, or to separate the moving contact from the stationary contact to open the circuit. An energy storage structure is connected to the handle and can rotate under the drive of the handle; when closing the circuit, the energy storage structure abuts against the moving contact when it rotates to a first preset angle, so that the first elastic element compresses the stored energy, and when it rotates to a second preset angle, it separates from the moving contact, so that the first elastic element releases the stored energy, thereby driving the moving contact to rotate rapidly toward the stationary contact until it contacts the stationary contact.

[0007] The circuit breaker provided in this application sets the hinge position between the moving contact and the mechanism body on the side of the mechanism body's rotation axis facing the stationary contact of the circuit breaker. In other words, the rotation axis of the moving contact is separate from the rotation axis of the mechanism body, and the rotation axis of the moving contact is located between the rotation axis of the mechanism body and the stationary contact of the circuit breaker. This configuration, with the same moving contact structure, increases the dimension between the rotation axis of the mechanism body and the end of the moving contact that contacts the stationary contact, thus increasing the lever arm between the rotation axis of the mechanism body and the moving contact point. This increases the opening distance between the moving and stationary contacts (i.e., the distance between the moving and stationary contacts when the circuit breaker is open) while maintaining the same overall circuit breaker structure. This achieves a large opening distance, extends the arc ignition path, expands the arc stretching space, and makes the arc easier to elongate, cool, and deionize, thereby accelerating the arc extinguishing speed, improving the circuit breaker's breaking capacity, and ensuring electrical safety. It also provides a guarantee for the design of high insulation, high voltage, and long life performance.

[0008] Furthermore, when the handle is closed, the energy storage structure on the handle can abut against the moving contact when the handle is rotated to the first preset angle, compressing the first elastic element to store energy. As the handle is rotated further to close the circuit, the energy storage structure separates from the moving contact when it rotates to the second preset angle. Simultaneously, the first elastic element extends and resets, releasing the stored energy. The elastic force generated during this release drives the moving contact to rotate rapidly toward the stationary contact, causing the moving and stationary contacts to quickly contact and maintain tight contact. This achieves rapid closure of the moving and stationary contacts, reducing the arcing time between them, decreasing erosion, and increasing the number of times the circuit breaker, especially the miniature circuit breaker, can close under load. This, in turn, ensures a long electrical life under high voltage and high current conditions.

[0009] Meanwhile, since the rotation axis of the moving contact is set separately from the rotation axis of the mechanism body and is located between the rotation axis of the mechanism body and the stationary contact of the circuit breaker, the lever arm between the end of the moving contact that contacts the stationary contact and the rotation axis of the moving contact is reduced. In this way, when the contact pressure of the moving contact and the stationary contact is the same when they are in contact and closing, the operating force required by the handle when closing is reduced. Thus, when closing, the customer can apply less force to close the circuit breaker, which saves time and effort, is easy to operate, and provides a better user experience.

[0010] In one possible design, the moving contact and the mechanism body are hinged together by a connecting shaft. The connecting shaft is fixed relative to one of the moving contact and the mechanism body, and rotatably connected to the other of the moving contact and the mechanism body.

[0011] With the above scheme, the moving contact and the mechanism body achieve relative rotation through the connecting shaft and relative fixation through the first elastic element. In this way, when the moving contact is not in contact with the energy storage structure, the moving contact and the mechanism body are relatively fixed, and the moving contact can rotate together under the drive of the mechanism body. When the first elastic element releases the stored energy, the moving contact can also rotate rapidly relative to the mechanism body under the action of the elastic force of the first elastic element, so as to realize the closing of the circuit breaker. The structure is simple, easy to manufacture, and convenient to reconfigure.

[0012] In one possible design, the first elastic element is sleeved on the connecting shaft, with one end of the first elastic element fixed relative to the moving contact and the other end of the first elastic element fixed relative to the mechanism body.

[0013] By employing the above scheme, the first elastic element is fitted onto the connecting shaft. The connecting shaft then limits the movement of the first elastic element, making its structure more stable and thus improving the overall stability of the mechanism and the moving contact. Furthermore, the connecting shaft guides the deformation of the first elastic element, preventing it from swaying during deformation and improving energy storage and release efficiency, thereby further accelerating the closing speed of the moving contact.

[0014] In one possible design, there are two first elastic elements, which are respectively disposed on both sides of the moving contact along the axial direction of the connecting shaft.

[0015] The above scheme incorporates two first elastic elements, one on each side of the moving contact along the axial direction of the connecting shaft. This arrangement ensures that when the moving contact contacts the energy storage structure, the mechanism compresses both first elastic elements simultaneously, storing energy concurrently. When the moving contact separates from the energy storage structure, both first elastic elements release their stored energy, increasing the released energy and thus the elastic force. This further accelerates the rapid closing speed of the moving contact, reduces the arcing time between the moving and stationary contacts, and consequently increases the number of times the circuit breaker, especially the miniature circuit breaker, can close under load, further guaranteeing a long electrical life under high voltage and high current conditions.

[0016] In one possible design, the mechanism body is provided with two opposite and spaced connecting ears, each of which has a shaft hole. The two ends of the connecting shaft are connected to the two shaft holes respectively, and the moving contact is sleeved on the connecting shaft.

[0017] The above scheme involves setting two connecting ears on the mechanism body, and rotating the moving contact between the two connecting ears via a connecting shaft. The structure is simple, and the connection is convenient and stable.

[0018] In one possible design, the connecting shaft is detachably connected to either the moving contact or the mechanism body.

[0019] The above solution allows for the detachable connection of the connecting shaft to its rotating moving contact or mechanism. This means that when one of the connecting shaft, moving contact, or mechanism is damaged and needs replacement, only the two need to be disassembled and the one that needs to be replaced can be replaced. Compared with the solution of replacing the entire connecting shaft and its rotating moving contact or mechanism, this saves costs and improves the customer's user experience.

[0020] In one possible design, the moving contact includes an insulated contact support and a conductive contact body. The contact support is hinged to the mechanism; the contact body is connected to the contact support and is relatively fixed. When closing, the energy storage structure abuts against the contact support when rotating to a first preset angle, compressing the first elastic element to store energy. When rotating to a second preset angle, it separates from the contact support, releasing the stored energy from the first elastic element, thereby driving the contact body to rotate rapidly toward the stationary contact until it contacts the stationary contact.

[0021] The above solution results in a simple structure for the moving contact, comprising a contact support and a contact body. This facilitates maintenance and replacement, helps reduce costs, and provides good temperature rise control. Furthermore, by indirectly connecting the contact body to the mechanism via the contact support, force transmission is optimized, improving the contact reliability of the moving contact.

[0022] In one possible design, the contact support and the mechanism body are hinged by a connecting shaft, and the connecting shaft is located in the area where the contact support and the contact body are combined. The contact body is provided with a clearance hole for avoiding the connecting shaft.

[0023] By using the above solution, a clearance hole is provided on the contact body, through which the connecting shaft can pass. In this way, the contact body and contact support can be connected to the mechanism together through the connecting shaft, which improves assembly efficiency and structural stability.

[0024] In one possible design, the energy storage structure includes an energy storage element and a second elastic element. Two stops are provided on one side of the handle, spaced apart circumferentially along the handle. The energy storage element is located between the two stops and abuts against one of them. One end of the energy storage element is connected to the rotation shaft of the handle, and the other end extends to the outside of the handle and abuts against the moving contact. The second elastic element is located on the side of the handle opposite to the energy storage element. One end of the second elastic element is fixed relative to the energy storage element, and the other end is fixed relative to the circuit breaker housing.

[0025] The above scheme incorporates an energy storage component and a second elastic component. The energy storage component is connected between two stops on the handle and abuts against one of the stops. The second elastic component is positioned on the side of the handle opposite to the energy storage component, with one end fixed relative to the handle and the other end fixed relative to the housing. This ensures the energy storage component remains relatively fixed to the handle and housing via the second elastic component, preventing it from wobbling in the circumferential direction of the handle and maintaining structural stability. Because the energy storage component abuts against one of the stops, when the handle rotates, the stop abutting against the energy storage component pushes it to rotate between the two stops, facilitating the rapid closure of the moving contact and thus energy storage. The structure is simple, easy to manufacture, and provides good energy storage performance.

[0026] In one possible design, the end of the energy storage component facing away from the rotation axis has an energy storage surface, which is an arc surface extending circumferentially along the rotation axis. The end of the moving contact facing the handle has an arc-shaped trigger protrusion. When the circuit is closed, when the energy storage component rotates to the first preset angle, the energy storage surface abuts against the trigger protrusion, so that the first elastic element compresses the stored energy. When the energy storage component rotates to the second preset angle, the energy storage component separates from the trigger protrusion, so that the first elastic element releases the stored energy, thereby driving the moving contact to rotate rapidly toward the stationary contact until it contacts the stationary contact.

[0027] The above scheme involves setting an arc-shaped energy storage surface on the energy storage component and an arc-shaped trigger protrusion on the moving contact. The energy storage surface abuts against the trigger protrusion, allowing the first elastic component to store energy. The structure is simple and easy to manufacture. Furthermore, the high degree of fit between the energy storage surface and the trigger protrusion helps reduce manufacturing difficulty and facilitates energy storage.

[0028] In one possible design, a receiving groove is provided on the side of the handle facing the moving contact, and an energy storage element is disposed in the receiving groove. A stop is formed on the groove wall along the circumference of the handle.

[0029] The above solution involves setting a receiving groove on the handle, within which the energy storage component is housed. The receiving groove provides a certain degree of containment and protection for the energy storage component, extending its service life and consequently, the circuit breaker's service life. Furthermore, when the handle is rotated, the groove wall along the circumference of the handle drives the energy storage component to rotate. The structure is simple, easy to manufacture, and provides a high strength force for driving the energy storage component. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a circuit breaker according to an embodiment of this application. Figure 1 .

[0031] Figure 2 This is a schematic diagram of the structure of a circuit breaker according to an embodiment of this application. Figure 2 .

[0032] Figure 3This is a schematic diagram of the structure of a circuit breaker according to an embodiment of this application. Figure 3 .

[0033] Figure 4 for Figure 3 A partial structural diagram.

[0034] Figure 5 This is an isometric view of the moving contact, mechanism body, and handle of a circuit breaker according to an embodiment of this application.

[0035] Figure 6 This is an isometric view of the moving contact of a circuit breaker according to an embodiment of this application.

[0036] Figure 7 for Figure 6 Exploded view.

[0037] Figure 8 This is an isometric view of the moving contact and mechanism of a circuit breaker according to another embodiment of this application.

[0038] Figure 9 Axonometric view of the handle and energy storage device according to an embodiment of this application. Figure 1 .

[0039] Figure 10 Axonometric view of the handle and energy storage device according to an embodiment of this application. Figure 2 .

[0040] Explanation of reference numerals in the attached drawings: 1. Handle; 11. Stop; 12. Receiving groove; 2. Mechanism body; 21. Connecting ear; 3. Moving contact; 31. Contact support; 311. Trigger protrusion; 32. Contact body; 321. Clearance hole; 4. Energy storage structure; 41. Energy storage component; 411. Energy storage surface; 42. Second elastic component; 51. Connecting shaft; 52. First elastic component; 6. Connecting component; 7. Housing; 71. Rotating shaft; 72. Mounting shaft; 8. Stationary contact; 9. Pin. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0043] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0045] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the circuit breaker of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0047] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] The circuit breaker includes a housing and a stationary contact, an operating mechanism, and a moving contact disposed within the housing. The stationary contact is fixed in a preset position. The operating mechanism is rotatably connected to the housing, and the moving contact is hinged to the rotating shaft of the operating mechanism. The operating mechanism is used to drive the moving contact to rotate, so that the moving contact and the stationary contact make contact to achieve closing, or to separate the moving contact and the stationary contact to achieve opening.

[0050] During operation, when a large fault current occurs in the circuit, the moving contact, under the action of electric repulsion, will quickly rotate away from the stationary contact, creating a safe distance (opening gap) between the moving and stationary contacts, thus tripping the circuit breaker. However, in related technologies, the arc-ignition path of the circuit breaker is limited, and arc extinguishing is difficult, resulting in insufficient breaking capacity and affecting electrical safety.

[0051] Based on this, refer to Figures 1 to 3 As shown, this embodiment provides a circuit breaker, which includes a handle 1, a mechanism body 2, a moving contact 3, an energy storage structure 4, and a first elastic element 52.

[0052] The circuit breaker also includes a housing 7 and a stationary contact 8. The housing 7 has a mounting cavity, and the stationary contact 8 is fixed in the mounting cavity.

[0053] The housing 7 also has a mounting port that communicates with the mounting cavity. The handle 1 is rotatably connected to the housing 7. Part of the handle 1 is located inside the mounting cavity, and the other part of the handle 1 is exposed outside the housing 7 from the mounting port for gripping and operation, so as to realize the manual closing or manual opening of the circuit breaker.

[0054] The mechanism body 2, moving contact 3, energy storage structure 4, and first elastic element 52 are all installed in the mounting cavity of the housing 7.

[0055] For details, please refer to Figures 1 to 3As shown, the mechanism body 2 can rotate around an axis. The moving contact 3 is hinged to the mechanism body 2, and the hinge position of the moving contact 3 and the mechanism body 2 is located on the side of the rotation axis of the mechanism body 2 facing the stationary contact 8 of the circuit breaker. The handle 1 is located on one side of the mechanism body 2 and is connected to the mechanism body 2 through the connecting piece 6. The handle 1 is used to drive the mechanism body 2 to rotate, thereby driving the moving contact 3 to rotate, so that the moving contact 3 contacts the stationary contact 8 to close the circuit, or to separate the moving contact 3 from the stationary contact 8 to open the circuit. The energy storage structure 4 is connected to the handle 1 and can rotate under the drive of the handle 1. When closing the circuit, the energy storage structure 4 abuts against the moving contact 3 when it rotates to the first preset angle, so that the first elastic element 52 compresses the stored energy, and separates from the moving contact 3 when it rotates to the second preset angle, so that the first elastic element 52 releases the stored energy, thereby driving the moving contact 3 to rotate rapidly toward the stationary contact 8 until it contacts the stationary contact 8.

[0056] refer to Figures 1 to 3 As shown, the handle 1 can be rotatably connected to the housing 7 via a rotating shaft 71. The axis of the rotating shaft 71 is the axis of rotation of the handle 1.

[0057] In some implementations, the rotating shaft 71 may be fixed inside the housing 7. The handle 1 is arranged around the circumferential outer side of the rotating shaft 71 and is rotatably connected to the rotating shaft 71, so that the handle 1 is rotatably connected to the housing 7.

[0058] Of course, in other implementations, the rotating shaft 71 can be integrally formed with the handle 1, that is, the rotating shaft 71 and the handle 1 are integral structures, and the rotating shaft 71 is rotatably connected to the housing 7, so that the handle 1 and the housing 7 are rotatably connected.

[0059] refer to Figures 1 to 3 As shown, the mechanism body 2 can be rotatably connected to the housing 7 via a mounting shaft 72. The axis of the mounting shaft 72 is the axis of rotation of the mechanism body 2.

[0060] In some implementations, the mounting shaft 72 can be fixed inside the housing 7. The mechanism body 2 is rotatably connected to the mounting shaft 72.

[0061] Of course, in other implementations, the mounting shaft 72 can be integrally formed with the mechanism body 2, that is, the mounting shaft 72 and the mechanism body 2 are integral structures, and the mounting shaft 72 is rotatably connected to the housing 7.

[0062] For specific implementation, refer to Figures 1 to 3 As shown, the rotating shaft 71 can be located on one side of the mounting shaft 72 in the radial direction, so that the handle 1 is located on one side of the mechanism body 2. The handle 1 and the mechanism body 2 are spaced apart.

[0063] In some implementations, refer to Figures 1 to 4As shown, the connecting member 6 can be, for example, a connecting rod, with one end hinged to the handle and the other end hinged to the mechanism body. When the handle 1 is rotated, it drives the mechanism body 2 to rotate via the connecting rod.

[0064] Since the moving contact 3 is hinged to the mechanism body 2, and a first elastic element 52 is provided between the mechanism body 2 and the moving contact 3, with one end of the first elastic element 52 fixed relative to the mechanism body 2 and the other end of the first elastic element 52 fixed relative to the moving contact 3, when the handle 1 drives the mechanism body 2 to rotate, the mechanism body 2 can drive the moving contact 3 to rotate.

[0065] Specifically, refer to Figure 1 and Figure 2 As shown, rotating handle 1 clockwise causes handle 1 to drive mechanism 2 to rotate. Mechanism 2 can drive moving contact 3 to rotate toward the stationary contact 8, so that moving contact 3 contacts stationary contact 8, thereby closing the circuit breaker.

[0066] refer to Figure 2 and Figure 3 As shown, when the handle 1 is rotated counterclockwise, the handle 1 drives the mechanism 2 to rotate in the opposite direction. The mechanism 2 can drive the moving contact 3 to rotate away from the stationary contact 8, so that the moving contact 3 and the stationary contact 8 are separated, thereby opening the circuit breaker.

[0067] refer to Figure 1 and Figure 3 As shown, when the handle 1 is rotated to close the circuit, the energy storage structure 4 rotates under the drive of the handle 1. When the energy storage structure 4 rotates to the first preset angle, it comes into contact with the moving contact 3, and the energy storage structure 4 begins to block the rotation of the moving contact 3. As the handle 1 continues to rotate to close the circuit, because the moving contact 3 is blocked by the energy storage structure 4, the mechanism 2 will compress the first elastic element 52 when it rotates. The first elastic element 52 is compressed and stores energy.

[0068] refer to Figure 3 and Figure 4 As shown, when the energy storage structure 4 abuts against the moving contact 3, the distance between the moving contact 3 and the stationary contact 8 is defined as the energy storage gap (reference). Figure 3 and Figure 4 (L2 in the middle). This energy storage gap is the last stroke before the moving contact 3 and the stationary contact 8 make contact and close the circuit.

[0069] refer to Figure 2 and Figure 3As shown, as the handle 1 continues to rotate to close the circuit, when the energy storage structure 4 rotates to the second preset angle, the energy storage structure 4 separates from the moving contact 3. At the same time, the first elastic element 52 extends and resets, releasing the stored energy. The release of stored energy by the first elastic element 52 drives the moving contact 3 to rotate rapidly toward the stationary contact 8, causing the moving contact 3 and the stationary contact 8 to quickly contact and close the circuit and maintain close contact. In other words, in the last stroke before the moving contact 3 and the stationary contact 8 make contact, the function of rapid closing of the moving contact 3 is realized, reducing the arcing time between the moving contact 3 and the stationary contact 8, thereby reducing the erosion of the moving contact 3 and the stationary contact 8, increasing the number of times the circuit breaker, especially the miniature circuit breaker, can close under load, and thus ensuring a long electrical life under high voltage and high current conditions.

[0070] It should be noted that when the first elastic element 52 releases the stored energy, the moving contact 3 will rotate around the hinge position between it and the mechanism body 2, that is, the rotation axis of the moving contact 3 is the hinge position between the moving contact 3 and the mechanism body 2.

[0071] When the handle 1 is rotated in the reverse direction to open the circuit breaker, the energy storage structure 4 rotates in the reverse direction under the drive of the handle 1. When the energy storage structure 4 rotates to the second preset angle, it comes into contact with the moving contact 3 and then quickly separates. The moving contact 3 then triggers the first elastic element 52 to deform, so that the moving contact 3 quickly rotates in the direction away from the stationary contact 8 under the action of the elastic force of the first elastic element 52, and the moving contact 3 separates from the stationary contact 8, realizing the opening of the circuit breaker.

[0072] It should be noted that during the tripping operation, the energy storage structure 4 will abut against the moving contact 3 before the handle 1 is rotated to its tripping position, causing the moving contact 3 to compress the first elastic element 52. This causes the first elastic element 52 to drive the moving contact 3 to quickly separate in the direction away from the stationary contact 8, thereby achieving rapid separation of the moving contact 3, tripping the circuit breaker, and improving the tripping efficiency of the circuit breaker.

[0073] refer to Figure 1As shown, since the hinge position between the moving contact 3 and the mechanism body 2 is located on the side of the rotation axis of the mechanism body 2 (i.e., the axis of the mounting shaft 72) facing the stationary contact 8, that is, the hinge position between the moving contact 3 and the mechanism body 2 is located on the side of the mounting shaft 72 facing the stationary contact 8, the rotation axis of the moving contact 3 is set independently of the rotation axis of the mechanism body 2, and the rotation axis of the moving contact 3 is located on the side of the rotation axis of the mechanism body 2 facing the stationary contact 8. Compared with the related art, where the moving contact is hinged to the mounting shaft of the mechanism body, With the same structure for the moving contact 3, the dimension between the rotation axis of the mechanism body 2 and the end of the moving contact 3 that contacts the stationary contact 8 is increased, i.e., the lever arm is increased. Thus, with the same overall circuit breaker structure, the opening distance L1 between the moving contact 3 and the stationary contact 8 (i.e., the distance between the moving contact 3 and the stationary contact 8 when the circuit breaker is open) is increased, achieving a large opening distance. This is especially suitable for miniature circuit breakers, improving the breaking capacity of the circuit breaker and providing a guarantee for the design of high insulation, high voltage, and long life performance.

[0074] In practice, the opening distance of the circuit breaker provided in this embodiment is at least 8mm.

[0075] The circuit breaker provided in this embodiment sets the hinge position of the moving contact 3 and the mechanism body 2 on the side of the rotation axis of the mechanism body 2 facing the stationary contact 8 of the circuit breaker. That is, the rotation axis of the moving contact 3 is set separately from the rotation axis of the mechanism body 2, and the rotation axis of the moving contact 3 is located between the rotation axis of the mechanism body 2 and the stationary contact 8 of the circuit breaker. This configuration, with the same structure for the moving contact 3, increases the dimension between the rotation axis of the mechanism body 2 and the end of the moving contact 3 that contacts the stationary contact 8. In other words, it increases the lever arm between the rotation axis of the mechanism body 2 and the moving contact of the moving contact 3. Thus, with the same overall circuit breaker structure, it increases the opening distance between the moving contact 3 and the stationary contact 8 (i.e., the distance between the moving contact 3 and the stationary contact 8 when the circuit breaker is open), achieving a large opening distance. This extends the arc ignition path, expands the arc stretching space, and makes the arc easier to elongate, cool, and deionize, thereby accelerating the arc extinguishing speed, improving the circuit breaker's breaking capacity, and ensuring electrical safety. It also provides a guarantee for the design of high insulation, high voltage, and long lifespan performance.

[0076] Furthermore, when the handle 1 is closed, the energy storage structure 4 mounted on the handle 1 can abut against the moving contact 3 when the handle 1 rotates to the first preset angle, causing the first elastic element 52 to be compressed and store energy. As the handle 1 continues to be rotated to close the circuit, the energy storage structure 4 will separate from the moving contact 3 when it rotates to the second preset angle. Simultaneously, the first elastic element 52 extends and resets, releasing the stored energy. The elastic force generated during this energy release drives the moving contact 3 to rotate rapidly toward the stationary contact 8, causing the moving contact 3 and stationary contact 8 to quickly contact and maintain close contact. This achieves rapid closure of the moving contact 3 and stationary contact 8, thereby reducing the arcing time between them, reducing erosion, and increasing the number of times the circuit breaker, especially the miniature circuit breaker, can be closed under load, thus ensuring a long electrical life under high voltage and high current conditions.

[0077] Meanwhile, since the rotation axis of the moving contact 3 is set separately from the rotation axis of the mechanism body 2 (i.e., the axis of the mounting shaft 72) and is located between the rotation axis of the mechanism body 2 and the stationary contact 8 of the circuit breaker, the lever arm between the end of the moving contact 3 that contacts the stationary contact 8 and the rotation axis of the moving contact 3 is reduced. In this way, when the contact pressure of the moving contact 3 and the stationary contact 8 is the same when they are in contact and closing, the operating force required by the handle 1 when closing is reduced. Thus, when closing, the customer can apply less force to close the circuit breaker, which saves time and effort, is easy to operate, and provides a better user experience.

[0078] In practice, the first elastic element 52 can be, for example, a spring or a torsion spring.

[0079] For example, the two ends of the first elastic element 52 can be detachably connected to the moving contact 3 and the mechanism body 2 respectively, which facilitates assembly and replacement and helps to save replacement costs.

[0080] refer to Figure 5 and Figure 7 As shown, in some embodiments, the moving contact 3 and the mechanism body 2 are hinged together by a connecting shaft 51. The connecting shaft 51 is fixed relative to one of the moving contact 3 and the mechanism body 2, and rotatably connected to the other of the moving contact 3 and the mechanism body 2.

[0081] The moving contact 3 and the mechanism body 2 achieve relative rotation through the connecting shaft 51 and relative fixation through the first elastic element 52. In this way, when the moving contact 3 is not in contact with the energy storage structure 4, the moving contact 3 and the mechanism body 2 are relatively fixed, and the moving contact 3 can rotate together under the drive of the mechanism body 2. When the first elastic element 52 releases the stored energy, the moving contact 3 can also rotate rapidly relative to the mechanism body 2 under the action of the elastic force of the first elastic element 52, so as to realize the closing of the circuit breaker. The structure is simple, easy to manufacture, and convenient to assemble.

[0082] In some implementations, refer to Figure 6As shown, the connecting shaft 51 is fixedly connected to the moving contact 3, and the connecting shaft 51 is rotatably connected to the mechanism body 2.

[0083] In some other implementations, the connecting shaft 51 is fixedly connected to the mechanism body 2, and the connecting shaft 51 is rotatably connected to the moving contact 3.

[0084] The following embodiments are explained and described in detail using the example of a fixed connection between the connecting shaft 51 and the moving contact 3, and a rotatable connection between the connecting shaft 51 and the mechanism body 2.

[0085] refer to Figure 5 and Figure 7 As shown, in some embodiments, the first elastic element 52 is sleeved on the connecting shaft 51, one end of the first elastic element 52 is fixed relative to the moving contact 3, and the other end of the first elastic element 52 is fixed relative to the mechanism body 2.

[0086] The first elastic element 52 is sleeved on the connecting shaft 51, so that the connecting shaft 51 limits the first elastic element 52, making the structure of the first elastic element 52 more stable, thereby improving the overall stability of the mechanism body 2 and the moving contact 3. In addition, the connecting shaft 51 also guides the deformation of the first elastic element 52, which to a certain extent avoids the first elastic element 52 from shaking during deformation, improves the energy storage efficiency and the energy release efficiency, and thus further accelerates the closing speed of the moving contact 3.

[0087] Of course, in other embodiments, the first elastic element 52 may also be provided at other positions between the moving contact 3 and the mechanism body 2, as long as the moving contact 3 and the mechanism body 2 are hinged together and kept relatively fixed. No further restrictions are imposed here.

[0088] In some embodiments, reference Figure 8 As shown, there are two first elastic elements 52, which are respectively disposed on both sides of the moving contact 3 along the axial direction of the connecting shaft 51.

[0089] By setting two first elastic elements 52, one elastic element is arranged on each side of the moving contact 3 along the axial direction of the connecting shaft 51. With this arrangement, when the moving contact 3 abuts against the energy storage structure 4, the mechanism body 2 compresses the two first elastic elements 52, and both first elastic elements 52 are compressed simultaneously to store energy. When the moving contact 3 separates from the energy storage structure 4, both first elastic elements 52 release the stored energy, increasing the released stored energy, i.e., increasing the elastic force. This further accelerates the rapid closing speed of the moving contact 3, further reduces the arcing time between the moving contact 3 and the stationary contact 8, and further increases the number of times the circuit breaker, especially the miniature circuit breaker, can close under load, further ensuring a long electrical life under high voltage and high current conditions.

[0090] Furthermore, the moving contact 3 and the mechanism body 2 are relatively fixed by two first elastic elements 52, which improves the connection stability between the moving contact 3 and the mechanism body 2. This prevents the moving contact 3 from wobbling when the mechanism body 2 drives the moving contact 3 to rotate, thereby improving the motion stability of the mechanism body 2 and the moving contact 3, ensuring the operational reliability and breaking capacity of the circuit breaker, and reducing safety hazards. At the same time, it helps to extend the service life of the circuit breaker.

[0091] Of course, in some other embodiments, when there is only one first elastic element 52, the first elastic element 52 can be set to be longer in the axial direction along the connecting shaft 51, so that the first elastic element 52 is symmetrically arranged on both sides of the connecting shaft.

[0092] refer to Figure 5 As shown, in some embodiments, the mechanism body 2 is provided with two opposite and spaced connecting ears 21, each of which has a shaft hole. The two ends of the connecting shaft 51 are respectively connected to the two shaft holes, and the moving contact 3 is sleeved on the connecting shaft 51.

[0093] By setting two connecting ears 21 on the mechanism body 2, the moving contact 3 is rotatably connected between the two connecting ears 21 through the connecting shaft 51. The structure is simple, and the connection is convenient and stable.

[0094] Furthermore, the two connecting ears 21 provide a certain degree of restraint for the moving contact 3, thereby improving the structural stability of the moving contact 3 and the mechanism body 2. In particular, when the moving contact 3 is rotatably connected to the connecting shaft 51, it effectively prevents the moving contact 3 from detaching from the connecting shaft 51, resulting in a high degree of connection stability between the moving contact 3 and the mechanism body 2.

[0095] In some embodiments, the connecting shaft 51 is detachably connected to either the moving contact 3 or the mechanism body 2.

[0096] By detachably connecting the connecting shaft 51 to the moving contact 3 or the mechanism body 2 that is rotatably connected to it, when one of the connecting shaft 51 or the moving contact 3 and the mechanism body 2 is damaged and needs to be replaced, it is only necessary to disassemble the two and replace the one that needs to be replaced. Compared with the solution of replacing the entire connecting shaft 51 and the moving contact 3 or the mechanism body 2 that is rotatably connected to it, it saves costs and improves the customer's user experience.

[0097] For example, refer to Figure 6 and Figure 7 As shown, when the connecting shaft 51 is fixedly connected to the moving contact 3 and the connecting shaft 51 is rotatably connected to the mechanism body 2, for example, the connecting shaft 51 can be set as a hollow structure with open ends. A pin 9 is detachably connected inside the connecting shaft 51, and the two ends of the pin 9 are detachably connected to the shaft holes on the two connecting ears 21 respectively.

[0098] During assembly, the entire structure of the connecting shaft 51 and the moving contact 3 is placed between the two connecting ears 21, and the openings at both ends of the connecting shaft 51 are aligned with the shaft holes on the two connecting ears 21. The pin 9 is then passed sequentially through the shaft hole of one connecting ear 21, the inner cavity of the connecting shaft 51, and the shaft hole of the other connecting ear 21, and locked to the two shaft holes to connect the moving contact 3 and the mechanism body 2. The pin 9 is detachably connected to the two shaft holes.

[0099] refer to Figures 5 to 8 As shown, in some embodiments, the moving contact 3 includes an insulated contact support 31 and a conductive contact body 32. The contact support 31 is hinged to the mechanism body 2; the contact body 32 is connected to the contact support 31 and is fixed relative to it. When the circuit is closed, the energy storage structure 4 abuts against the contact support 31 when it rotates to a first preset angle, so that the first elastic member 52 compresses the stored energy, and separates from the contact support 31 when it rotates to a second preset angle, so that the first elastic member 52 releases the stored energy, thereby driving the contact body 3 to rotate rapidly toward the stationary contact 8 until it contacts the stationary contact 8.

[0100] The moving contact 3 includes a contact support 31 and a contact body 32. Its simple structure facilitates maintenance and replacement, helps reduce costs, and provides good temperature rise performance. Furthermore, by indirectly connecting the contact body 32 to the mechanism body 2 via the contact support 31, force transmission is optimized, improving the contact reliability of the moving contact 3.

[0101] In a specific implementation, the connecting shaft 51 and the contact support 31 are, for example, integrally formed. The connecting shaft 51 is rotatably connected to the mechanism body 2. The contact support 31 is connected to the mechanism body 2 via the connecting shaft 51 and the first elastic element 52, thereby indirectly connecting the contact body 32 to the mechanism body 2.

[0102] During assembly, the connecting shaft 51 is detachably connected to the two connecting ears 21 of the mechanism body 2 via the pin 9 passing through it.

[0103] In some implementations, the contact body 32 and the contact support 31 can be connected together, for example, by fasteners such as bolts.

[0104] Of course, in other implementations, for example, the contact body 32 can be fixed on the mold of the contact support 31, and then the contact support 31 can be injection molded. In this way, the contact body 32 and the contact support 31 form an integrated structure with high structural strength and convenient assembly.

[0105] refer to Figure 5 and Figure 7As shown, in some embodiments, the contact support 31 is hinged to the mechanism body 2 via a connecting shaft 51, and the connecting shaft 51 is located in the area where the contact support 31 and the contact body 32 are joined. That is, the connection position of the connecting shaft 51 on the contact support 31 is located in the area where the contact support 31 and the contact body 32 are joined. The contact body 32 is provided with a clearance hole 321 for avoiding the connecting shaft 51, and there is a gap between the hole wall of the clearance hole 321 and the connecting shaft 51.

[0106] In practice, the diameter of the clearance hole 321 is larger than the diameter of the connecting shaft 51, and the connecting shaft 51 passes through the clearance hole 321.

[0107] By providing a clearance hole 321 on the contact body 32, the connecting shaft 51 can pass through the clearance hole 321. In this way, the contact body 32 and the contact support 31 can be connected together to the mechanism body 2 through the connecting shaft 51, which improves assembly efficiency and structural stability.

[0108] Furthermore, when the contact body 32, contact support 31, and mechanism body 2 are installed in place via the connecting shaft 51, there is a gap between the connecting shaft 51 and the wall of the clearance hole 321, meaning that the connecting shaft 51 does not contact the contact body 32, resulting in a better temperature rise effect and without affecting the conductivity of the contact body 32.

[0109] For example, refer to Figure 7 As shown, the contact support 31 is provided with a receiving cavity for accommodating the contact body 32. The contact body 32 is provided with a clearance hole 321, and the end of the contact body 32 facing the mechanism body 2 extends into the receiving cavity. The clearance hole 321 communicates with the hollow inner cavity of the connecting shaft 51. The contact support 31 and the contact body 32 are detachably connected to the two connecting ears 21 of the mechanism body 2 by a pin 9 passing through the connecting shaft 51. The structure is simple, the connection is convenient and stable, and it is easy to replace.

[0110] refer to Figure 9 and Figure 10 As shown, in some embodiments, the energy storage structure 4 includes an energy storage element 41 and a second elastic element 42. Two stop members 11 are provided on one side of the handle 1, spaced apart circumferentially along the handle 1. The energy storage element 41 is located between the two stop members 11 and abuts against one of them. One end of the energy storage element 41 is connected to the rotation shaft 71 of the handle 1, and the other end extends to the outside of the handle 1 and abuts against the moving contact 3. The second elastic element 42 is provided on the side of the handle 1 opposite to the energy storage element 41. One end of the second elastic element 42 is fixed relative to the energy storage element 41, and the other end is fixed relative to the circuit breaker housing.

[0111] By including an energy storage component 41 and a second elastic component 42 in the energy storage structure 4, the energy storage component 41 is connected between two stop components 11 on the handle 1 and abuts against one of the stop components 11. The second elastic component 42 is located on the side of the handle 1 away from the energy storage component 41, with one end of the second elastic component 42 fixed relative to the energy storage component 41 and the other end fixed relative to the housing. That is, the energy storage component 41 is kept relatively fixed to both the handle 1 and the housing through the second elastic component 42, so that the energy storage component 41 will not wobble in the circumferential direction of the handle 1, and the structure is stable. Since the energy storage component 41 abuts against one of the stop components 11, when the handle 1 is rotated, the stop component 11 abutting against the energy storage component 41 can push the energy storage component 41 to rotate between the two stop components 11, so as to quickly close the moving contact 3 to form energy storage. The structure is simple, easy to manufacture, and has a good energy storage effect.

[0112] In practice, when the handle 1 is rotated to close the circuit, the stop 11, which abuts against the energy storage component 41, can push the energy storage component 41 to rotate around the rotation axis of the handle 1. When the energy storage component 41 rotates to a first preset angle under the push of the stop 11, it abuts against the contact support 31, so that the first elastic element 52 compresses the stored energy. If the handle 1 is rotated to close the circuit, the energy storage component 41 rotates to a second preset angle under the drive of the stop 11, and separates from the contact support 31, so that the first elastic element 52 releases the stored energy, thereby causing the contact body 32 to quickly rotate towards the stationary contact 8 to close under the elastic force of the first elastic element 52.

[0113] When the handle 1 is rotated in the reverse direction to open the circuit breaker, another stop 11 can push the energy storage element 41 to rotate in the opposite direction around the rotation axis of the handle 1. When the energy storage element 41 rotates to the second preset angle under the push of the other stop 11, it abuts against the contact support 31 and then quickly separates from the contact support 31. The contact support 31 will trigger the first elastic element 52 to deform, so that the contact body 32 quickly rotates in the direction away from the stationary contact 8 under the action of the elastic force of the first elastic element 52, and the contact body 32 separates from the stationary contact 8, realizing the opening of the circuit breaker.

[0114] It should be noted that during the tripping operation, the energy storage component 41 abuts against the contact support 31 before the handle 1 is rotated to its tripping position, causing the contact support 31 to compress the first elastic component 52, thereby driving the moving contact 3 to quickly separate, realizing the tripping of the circuit breaker and improving the tripping efficiency of the circuit breaker.

[0115] When the handle 1 is reset, the energy storage component 41 is reset together under the combined action of the handle 1 and the second elastic component 42.

[0116] The second elastic element 42 can be, for example, a spring, a torsion spring, etc.

[0117] refer to Figure 8 and Figure 10As shown, in some embodiments, the end of the energy storage component 41 facing away from the rotation shaft 71 has an energy storage surface 411, which is an arc surface extending circumferentially along the rotation shaft 71. The end of the moving contact 3 facing the handle 1 has an arc-shaped trigger protrusion 311. When the circuit is closed, when the energy storage component 41 rotates to the first preset angle, the energy storage surface 411 abuts against the trigger protrusion 311, so that the first elastic member 52 compresses the stored energy. When the energy storage component 41 rotates to the second preset angle, the energy storage component 41 separates from the trigger protrusion 311, so that the first elastic member 52 releases the stored energy, thereby driving the moving contact 3 to rotate rapidly toward the stationary contact 8 until it contacts the stationary contact 8.

[0118] By providing an arc-shaped energy storage surface 411 on the energy storage component 41 and an arc-shaped trigger protrusion 311 on the moving contact 3, the first elastic element 52 stores energy through the contact between the energy storage surface 411 and the trigger protrusion 311. The structure is simple and easy to manufacture. Furthermore, the high degree of fit between the energy storage surface 411 and the trigger protrusion 311 helps reduce manufacturing difficulty and facilitates energy storage.

[0119] The energy storage surface 411 extends circumferentially along the rotation axis 71 of the handle 1. This arrangement ensures that, on the one hand, the energy storage surface 411 and the trigger protrusion 311 are in surface contact, providing a firm fit and high force transmission efficiency, thus resulting in high energy storage efficiency. On the other hand, when the handle 1 is turned to close, after the energy storage surface 411 and the trigger protrusion 311 come into contact, they maintain this contact state for a certain period of time as the handle 1 continues to rotate. This provides sufficient deformation time for the first elastic element 52, allowing it to undergo sufficient elastic deformation to store energy. This enhances the elastic force released by the first elastic element 52, further accelerating the closing speed of the contact body 32.

[0120] refer to Figure 8 As shown, in some embodiments, a receiving groove 12 is provided on the side of the handle 1 facing the moving contact 3, and an energy storage member 41 is disposed in the receiving groove 12. A stop member 11 is formed on the groove wall of the receiving groove 12 along the circumferential direction of the handle 1.

[0121] By providing a receiving groove 12 on the handle 1, the energy storage component 41 is placed inside the receiving groove 12. The receiving groove 12 provides a certain degree of containment and protection for the energy storage component 41, extending its service life and thus extending the service life of the circuit breaker. Furthermore, when the handle 1 is rotated, the groove wall of the receiving groove 12 along the circumference of the handle 1 can push the energy storage component 41 to rotate. The structure is simple, easy to manufacture, and has a high strength of force to push the energy storage component 41.

[0122] In other embodiments, the stop 11 may be a stop protrusion or a stop arm provided on the handle 1.

Claims

1. A circuit breaker, characterized in that, It includes a handle, a mechanism body, a moving contact, an energy storage structure, and a first elastic element; The mechanism body is rotatable about an axis, the moving contact is hinged to the mechanism body, and the hinge position of the moving contact and the mechanism body is located on the side of the rotation axis of the mechanism body facing the stationary contact of the circuit breaker; the first elastic element is disposed between the mechanism body and the moving contact; The handle is located on one side of the mechanism and is connected to the mechanism via a connector. The handle is used to drive the mechanism to rotate, thereby causing the moving contact to rotate, so that the moving contact can contact the stationary contact to close the circuit, or to separate the moving contact from the stationary contact to open the circuit. The energy storage structure is connected to the handle and can rotate under the drive of the handle; when the circuit is closed, the energy storage structure abuts against the moving contact when it rotates to the first preset angle, so that the first elastic element compresses the stored energy, and separates from the moving contact when it rotates to the second preset angle, so that the first elastic element releases the stored energy, thereby driving the moving contact to rotate rapidly toward the stationary contact until it contacts the stationary contact.

2. The circuit breaker according to claim 1, characterized in that, The moving contact is hinged to the mechanism body via a connecting shaft; The connecting shaft is fixed relative to one of the moving contact and the mechanism body, and is rotatably connected to the other of the moving contact and the mechanism body.

3. The circuit breaker according to claim 2, characterized in that, The first elastic element is sleeved on the connecting shaft, one end of the first elastic element is fixed relative to the moving contact, and the other end of the first elastic element is fixed relative to the mechanism body.

4. The circuit breaker according to claim 3, characterized in that, There are two first elastic elements, which are respectively disposed on both sides of the moving contact along the axial direction of the connecting shaft.

5. The circuit breaker according to claim 2, characterized in that, The mechanism body is provided with two opposite and spaced connecting ears, and each of the two connecting ears is provided with a shaft hole. The two ends of the connecting shaft are respectively connected to the two shaft holes, and the moving contact is sleeved on the connecting shaft. And / or, the connecting shaft is detachably connected to either the moving contact or the mechanism body.

6. The circuit breaker according to claim 1, characterized in that, The moving contact includes an insulated contact support and a conductive contact body; The contact support is hinged to the mechanism body; the contact body is connected to the contact support and is relatively fixed. When the circuit is closed, the energy storage structure abuts against the contact support when it rotates to the first preset angle, so that the first elastic element compresses the stored energy, and separates from the contact support when it rotates to the second preset angle, so that the first elastic element releases the stored energy, thereby driving the contact body to rotate rapidly toward the stationary contact until it contacts the stationary contact.

7. The circuit breaker according to claim 6, characterized in that, The contact support is hinged to the mechanism body via a connecting shaft, and the connecting shaft is located in the area where the contact support is combined with the contact body. The contact body is provided with a clearance hole for avoiding the connecting shaft.

8. The circuit breaker according to any one of claims 1 to 7, characterized in that, The energy storage structure includes an energy storage component and a second elastic component; Two stop members are provided on one side of the handle. The two stop members are spaced apart along the circumference of the handle. The energy storage member is located between the two stop members and abuts against one of the stop members. One end of the energy storage member is connected to the rotation shaft of the handle, and the other end of the energy storage member extends to the outside of the handle and is used to abut against the moving contact. The second elastic element is disposed on the side of the handle opposite to the energy storage element. One end of the second elastic element is fixed relative to the energy storage element, and the other end of the second elastic element is fixed relative to the housing of the circuit breaker.

9. The circuit breaker according to claim 8, characterized in that, The energy storage component has an energy storage surface at the end opposite to the rotating shaft. The energy storage surface is an arc surface extending circumferentially along the rotating shaft. The moving contact has an arc-shaped trigger protrusion at the end facing the handle. When the circuit is closed, when the energy storage component rotates to a first preset angle, the energy storage surface abuts against the trigger protrusion, so that the first elastic element compresses and stores energy. When the energy storage component rotates to a second preset angle, the energy storage component separates from the trigger protrusion, so that the first elastic element releases the stored energy, thereby driving the moving contact to rotate rapidly toward the stationary contact until it contacts the stationary contact. And / or, the handle has a receiving groove on the side facing the moving contact, the energy storage member is disposed in the receiving groove, and the groove wall of the receiving groove along the circumferential direction of the handle is formed as the stop member.

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