Operating mechanism and circuit breaker

Abstract

The application discloses an operating mechanism and a circuit breaker, and relates to the technical field of low-voltage electrical apparatuses. The operating mechanism comprises a mechanism seat, a trip buckle, a lock buckle, a connecting rod and a handle, the trip buckle and the lock buckle are rotationally arranged on the mechanism seat, the first end of the connecting rod is hingedly connected with the handle, the second end of the connecting rod is connected with the trip buckle, and a reset member is arranged on the movement path of the connecting rod; when the circuit breaker is opened, the handle drives the connecting rod to rotate to contact the reset member, the reset member is used for driving the connecting rod to rotate, so that the trip buckle is overlapped with the lock buckle. The operating mechanism drives the connecting rod to rotate over the dead point through the reset member, ensures that the trip buckle is reliably overlapped with the lock buckle, and thus the safety of the circuit breaker is improved.

Description

Technical Field

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

[0002] As the core protection device for terminal power distribution lines, circuit breakers not only provide stable connection to the line, but also enable current connection, carrying, and disconnection operations during normal circuit operation or in the event of faults (such as overloads or short circuits). This provides crucial safety protection for household wiring and various electrical appliances, effectively mitigating electrical risks. The working principle of a circuit breaker is as follows: a fault current triggers an internal trip unit (such as a thermal trip unit or magnetic trip unit), driving the tripping mechanism to release the latch; the mechanism base, under the action of the energy storage spring, drives the moving contact to open, and the operating handle simultaneously switches from the closed position to the open position, providing external status indication.

[0003] During the aforementioned tripping process, the trip latch re-establishes a locking relationship with the locking latch via a connecting rod to ensure that the circuit breaker remains in the tripped state. However, in the motion transmission chain, the connection structure between the connecting rod and the trip latch has a "three-point collinearity" motion dead point, namely, the hinge point of the trip latch, the hinge point between the connecting rod and the trip latch, and the hinge point between the connecting rod and the operating handle are all on the same straight line, causing the mechanism to fail to form a mechanical self-locking mechanism.

[0004] Existing technology relies on the impact force generated by the spring inside the operating handle upon release, along with the inertia of the moving parts, to overcome the dead point and re-engage the trip latch and the locking latch. However, the spring needs to be compressed and store energy for a long time during closing. Affected by humid and dusty environments, its elasticity is easily degraded, resulting in insufficient energy release. At the same time, dust accumulation can hinder the free movement of the operating handle. Consequently, the operating handle lacks sufficient impact force to overcome the dead point during automatic opening, ultimately causing the trip latch and the locking latch to fail to engage effectively. This leads to mechanical interlock failure, destroying its reliable disconnection function and status indication, and creating a safety hazard. Utility Model Content

[0005] The purpose of this application is to provide an operating mechanism and circuit breaker that drives the linkage to rotate past the dead point through a reset member, ensuring reliable engagement between the tripping fastener and the locking fastener, thereby improving the safety of the circuit breaker.

[0006] The embodiments of this application are implemented as follows: A first aspect of this application provides an operating mechanism, including a mechanism base, a trip fastener, a locking fastener, a connecting rod, and a handle. The trip fastener and the locking fastener are rotatably mounted on the mechanism base. A first end of the connecting rod is hinged to the handle, and a second end is connected to the trip fastener. A reset element is provided along the movement path of the connecting rod. When the circuit breaker is tripped, the handle drives the connecting rod to rotate until it contacts the reset element. The reset element drives the connecting rod to rotate, causing the trip fastener and the locking fastener to engage. This operating mechanism, by driving the connecting rod to rotate past the dead point through the reset element, ensures reliable engagement between the trip fastener and the locking fastener, thereby improving the safety of the circuit breaker.

[0007] In one possible implementation, the mechanism base is provided with a mounting shaft, and the jump fastener is provided with a connecting hole and an oblong hole. The mounting shaft passes through the connecting hole, and the second end of the connecting rod passes through the oblong hole. The mounting shaft and the second end of the connecting rod form a first connecting line, and the second end of the connecting rod and the first end form a second connecting line. When the connecting rod rotates to an angle of ±10° between the first connecting line and the second connecting line, the reset member contacts the connecting rod to drive the connecting rod to rotate, causing the second end of the connecting rod to slide in the oblong hole, and simultaneously driving the jump fastener to rotate around the mounting shaft until it overlaps with the locking member.

[0008] In one possible implementation, the connecting rod has a U-shaped structure, the handle is provided with a mounting hole, the first folding arm of the U-shaped structure passes through the mounting hole, the second folding arm passes through the waist-shaped hole, and the connecting rod body connecting the first folding arm and the second folding arm is bent toward the side closer to the reset member.

[0009] In one possible implementation, the connecting rod body includes a first rod and a second rod, the first folding arm, the first rod, the second rod and the second folding arm are connected in sequence, and there is a preset angle between the first rod and the second rod.

[0010] In one possible implementation, the reset member is a boss provided on the housing of the circuit breaker. The boss contacts the first rod body to drive the connecting rod to rotate, so that the second folding arm slides from the end of the waist-shaped hole near the connecting hole to the end away from the connecting hole, while driving the jump fastener to rotate to engage with the locking fastener.

[0011] In one possible implementation, the reset member is a limiting surface disposed on the contact seat of the circuit breaker or the mechanism seat. The limiting surface contacts the second folding arm to drive the connecting rod to rotate, so that the second folding arm slides from the end of the waist-shaped hole near the connecting hole to the end away from the connecting hole, while simultaneously driving the jump fastener to rotate to engage with the locking fastener.

[0012] As one possible implementation, the angle between the second connecting line and the normal of the limiting surface is α, and satisfies 12°<α<45°.

[0013] In one possible implementation, the center of the connecting hole and the center of the waist-shaped hole near the connecting hole form a third line, and the angle between the third line and the length direction of the waist-shaped hole is β, satisfying 15°≤β≤45°.

[0014] As one possible implementation, the connecting hole is circular or oblong in shape.

[0015] A second aspect of this application provides a circuit breaker including the aforementioned operating mechanism. This operating mechanism drives a linkage to rotate past a dead point via a reset member, ensuring reliable engagement between the tripping and locking members, thereby improving the safety of the circuit breaker.

[0016] The beneficial effects of the embodiments of this application include: The operating mechanism includes a base, a trip fastener, a locking fastener, a connecting rod, and a handle. The trip fastener and locking fastener are rotatably mounted on the base. The first end of the connecting rod is hinged to the handle, and the second end is connected to the trip fastener. A reset element is provided along the movement path of the connecting rod. During tripping, the handle drives the connecting rod to rotate until it contacts the reset element. The reset element drives the connecting rod to rotate, allowing the trip fastener and locking fastener to engage. The operating mechanism provided in this application, by providing a reset element along the movement path of the connecting rod, can drive the connecting rod to rotate during tripping, smoothly overcoming the "three-point collinearity" dead point of the connection structure between the connecting rod and the trip fastener. This facilitates the engagement of the trip fastener and locking fastener without relying on the impact force of the spring inside the operating handle or the inertia of the moving parts. Even in humid or dusty environments where the elasticity of the spring inside the operating handle weakens, it can still ensure reliable engagement of the trip fastener and locking fastener, preventing mechanical interlock failure, ensuring the stability of the circuit breaker's tripping function and accurate status indication, and reducing potential electrical safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the operating mechanism in the closed position provided in the first embodiment of this application; Figure 2 This is a structural diagram of the operating mechanism at its dead point, provided in the first embodiment of this application; Figure 3This is a schematic diagram of the operating mechanism's open position provided in the first embodiment of this application; Figure 4 This is a schematic diagram of the structure of the reset component provided in the first embodiment of this application; Figure 5 This is a schematic diagram of the operating mechanism in the closed position provided in the second embodiment of this application; Figure 6 This is a structural diagram of the operating mechanism at its dead point according to the second embodiment of this application; Figure 7 This is a schematic diagram of the operating mechanism's open position provided in the second embodiment of this application; Figure 8 This is a schematic diagram of the structure of the reset component provided in the second embodiment of this application; Figure 9 This is a structural schematic diagram of the jump fastener provided in an embodiment of this application.

[0019] Icons: 10-Mechanism base; 11-Mounting shaft; 20-Jump fastener; 21-Connecting hole; 22-Oval hole; 30-Locking fastener; 40-Connecting rod; 41-First rod body; 42-Second rod body; 50-Handle; 51-Mounting hole; 60-Housing; 61-Boss; 70-Contact seat; 71-Limiting surface; E-First connecting line; A-Second connecting line; B-Normal line; C-Third connecting line; D-Length direction. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this application, not all embodiments. Similar reference numerals and letters in the following drawings indicate similar items. Once an item is defined in one drawing, it does not need to be further defined in other drawings.

[0021] The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and should not be construed as limiting this application. The terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. 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 connections within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Please refer to the reference. Figures 1 to 9 This application provides an operating mechanism including a mechanism base 10, a trip fastener 20, a locking fastener 30, a connecting rod 40, and a handle 50. The trip fastener 20 and the locking fastener 30 are rotatably mounted on the mechanism base 10. The first end of the connecting rod 40 is hinged to the handle 50, and the second end is connected to the trip fastener 20. A reset element is provided along the movement path of the connecting rod 40. When the circuit is opened, the handle 50 drives the connecting rod 40 to rotate until it contacts the reset element. The reset element drives the connecting rod 40 to rotate so that the trip fastener 20 and the locking fastener 30 engage. This operating mechanism drives the connecting rod 40 to rotate past the dead point through the reset element, ensuring reliable engagement of the trip fastener 20 and the locking fastener 30, thereby improving the safety of the circuit breaker.

[0024] It should be noted that the operating mechanism includes a mechanism base 10, a trip fastener 20, a locking fastener 30, a connecting rod 40, and a handle 50. The mechanism base 10 and the handle 50 are respectively rotatably installed inside the circuit breaker housing 60. The mechanism base 10 serves as a load-bearing component, providing installation and support for the trip fastener 20, the locking fastener 30, the contact seat 70, and the moving contact. The handle 50 and the trip fastener 20 are connected by the connecting rod 40. The trip fastener 20 and the locking fastener 30 are rotatably mounted on the mechanism base 10. The trip fastener 20 and the locking fastener 30 have two engagement states: when the circuit breaker switches from the open state to the closed state, the trip fastener 20 and the locking fastener 30 are in the engagement state, so that the handle 50 can be driven to move the moving contact toward the side closer to the stationary contact through the joint action of the mechanism base 10, the trip fastener 20, the locking fastener 30 and the contact base 70. When the fault current triggers the trip unit in the circuit breaker, the trip fastener 20 and the locking fastener 30 quickly separate to ensure that the moving contact and the stationary contact separate quickly. When the handle 50 is about to switch from the closed position to the open position, the trip fastener 20 and the locking fastener 30 re-engage to prepare for the next closing action of the circuit breaker.

[0025] In the first stage of the opening process, the handle 50 drives the connecting rod 40 to rotate around its own axis. Simultaneously, the second end of the connecting rod 40 pulls the trip fastener 20 to rotate around the mounting shaft 11 of the mechanism base 10. The trip fastener 20 and the locking fastener 30 gradually approach each other. At this time, the connecting rod 40 is in an "active force transmission" state, with the motion power coming from the driving force of the handle 50. In the second stage of the opening process, as the handle 50 continues to rotate, the movement path of the connecting rod 40 gradually approaches the dead point position. That is, the hinge point between the trip fastener 20 and the mechanism base 10, the connection point between the second end of the connecting rod 40 and the trip fastener 20, and the hinge point between the first end of the connecting rod 40 and the handle 50 are on or approximately on the same straight line. At this time, the driving torque of the handle 50 on the trip fastener 20 is reduced to a minimum. If only the driving force of the handle 50 is relied upon... The connecting rod 40 is prone to getting stuck near the dead point, preventing the tripping fastener 20 and the locking fastener 30 from getting closer and forming a mechanical self-locking mechanism. In the third stage of the tripping process, when the connecting rod 40 rotates to contact the reset member, the reset member applies a force to the connecting rod 40 that matches the driving force of the handle 50, helping the connecting rod 40 overcome the problem of minimizing the torque at the dead point and pushing the connecting rod 40 to continue rotating, allowing the tripping fastener 20 to smoothly pass the dead point and continue to approach the locking fastener 30. In the fourth stage of the tripping process, after the connecting rod 40 successfully passes the dead point with the assistance of the reset member, the tripping fastener 20 is pulled by the connecting rod 40 and comes into close contact with the locking fastener 30. At the same time, the locking fastener 30 remains stable under the action of its own reset spring, forming a mechanical lock with the tripping fastener 20. At this point, the circuit breaker has completely completed the tripping action.

[0026] Existing circuit breakers rely on the impact force of the spring inside the operating handle and the inertia of moving parts. In humid or dusty environments, when the elasticity of the spring inside the operating handle weakens, the trip latch and the locking latch cannot effectively engage. The operating mechanism provided in this application, by setting a reset element on the movement path of the connecting rod 40, can drive the connecting rod 40 to rotate during the opening process, smoothly passing the motion dead point of the "three points collinear" connection structure between the connecting rod 40 and the trip latch, thereby helping the trip latch 20 and the locking latch 30 to engage. It does not rely on the impact force of the spring inside the operating handle 50 and the inertia of moving parts. Even in humid or dusty environments where the elasticity of the spring inside the operating handle 50 weakens, it can still ensure that the trip latch 20 and the locking latch 30 reliably engage, avoid mechanical interlock failure, ensure the stability of the circuit breaker's breaking function and the accuracy of status indication, and reduce potential electrical safety hazards.

[0027] As one possible implementation method, such as Figures 1 to 3 , Figures 5 to 7As shown, the mechanism base 10 is provided with a mounting shaft 11, and the jump fastener 20 is provided with a connecting hole 21 and an oblong hole 22. The mounting shaft 11 passes through the connecting hole 21, and the second end of the connecting rod 40 passes through the oblong hole 22. The mounting shaft 11 and the second end of the connecting rod 40 form a first connecting line E, and the second end and the first end of the connecting rod 40 form a second connecting line A. When the connecting rod 40 rotates to the point where the angle between the first connecting line E and the second connecting line A is ±10°, the reset member contacts the connecting rod 40 to drive the connecting rod 40 to rotate, so that the second end of the connecting rod 40 slides in the oblong hole 22, and at the same time drives the jump fastener 20 to rotate around the mounting shaft 11 until it overlaps with the locking member 30.

[0028] It should be noted that the mechanism base 10 is provided with a mounting shaft 11, and the jump fastener 20 is provided with a connecting hole 21 and an oblong hole 22. The mounting shaft 11 passes through the connecting hole 21 so that the jump fastener 20 is rotatably connected to the mechanism base 10. The second end of the connecting rod 40 passes through the oblong hole 22, forming a composite connection of "sliding + rotation". When the connecting rod 40 drives the jump fastener 20 to move, the second end of the connecting rod 40 can slide along the length direction D of the oblong hole 22. At the same time, the second end of the connecting rod 40 can also rotate around its own axis (or the hinge point between the first end of the connecting rod 40 and the handle 50) to achieve flexible compensation of the motion trajectory, further ensuring that the jump fastener 20 smoothly passes the dead point and continues to move closer to the locking fastener 30.

[0029] Specifically, the second end of the mounting shaft 11 and the second end of the connecting rod 40 form a first connecting line E, and the second end of the connecting rod 40 and the first end form a second connecting line A. When the connecting rod 40 rotates to the point where the angle between the first connecting line E and the second connecting line A is ±10° (i.e., the three points are collinear or approximately collinear), the connecting rod 40 contacts the reset member. The reset member applies a force to the connecting rod 40 that matches the direction of the driving force of the handle 50. The driving force of the auxiliary handle 50 pushes the connecting rod 40 past the dead point. At this time, the second end of the connecting rod 40 slides along the length direction D in the oblong hole 22, converting the rotational motion of the connecting rod 40 into the rotational motion of the jump fastener 20, thus avoiding rigid interference between components. After the connecting rod 40 passes the dead point, the connecting rod 40 continues to rotate under the drive of the handle 50. The second end of the connecting rod 40 slides to the limit position in the oblong hole 22 (i.e., the end of the oblong hole 22 away from the connecting hole 21), so that the jump fastener 20 and the locking fastener 30 are fully engaged, completing the mechanical self-locking.

[0030] As one possible implementation method, such as Figures 1 to 3 , Figures 5 to 7 As shown, the connecting rod 40 has a U-shaped structure, and the handle 50 is provided with a mounting hole 51. The first folding arm of the U-shaped structure passes through the mounting hole 51, and the second folding arm passes through the waist-shaped hole 22. The connecting rod body connecting the first folding arm and the second folding arm is bent toward the side closer to the reset member.

[0031] It should be noted that the connecting rod 40 has a U-shaped structure. The U-shaped structure includes a first folding arm and a second folding arm arranged opposite each other, as well as a connecting rod body connecting the first folding arm and the second folding arm. The first folding arm passes through the mounting hole 51, forming a hinge structure with clearance fit, which ensures that the connecting rod 40 can rotate flexibly around the mounting hole 51. The second folding arm passes through the waist-shaped hole 22, which not only ensures that the second folding arm can slide along the length direction D of the waist-shaped hole 22, but also restricts the radial movement of the second folding arm, ensuring the stability of force transmission.

[0032] As one possible implementation method, such as Figures 1 to 3 , Figures 5 to 7 As shown, the connecting rod body includes a first rod 41 and a second rod 42. The first folding arm, the first rod 41, the second rod 42 and the second folding arm are connected in sequence, and there is a preset angle between the first rod 41 and the second rod 42.

[0033] It should be noted that the connecting rod body includes a first rod 41 and a second rod 42. The first folding arm, the first rod 41, the second rod 42 and the second folding arm are connected in sequence. The connecting rod body can be integrally molded to ensure the connection strength of each segment. There is a preset included angle between the first rod 41 and the second rod 42. The value of the preset included angle can be between 100° and 135°. Those skilled in the art should be able to make reasonable selections and designs according to the actual situation, as long as the stability of the contact between the connecting rod 40 and the reset member and the force transmission is ensured.

[0034] As one possible implementation method, such as Figures 1 to 4 As shown, in some embodiments, the reset member is a boss 61 provided on the housing 60 of the circuit breaker. The boss 61 contacts the first rod body 41 to drive the connecting rod 40 to rotate, so that the second folding arm slides from the end of the waist-shaped hole 22 near the connecting hole 21 to the end away from the connecting hole 21, while driving the jump fastener 20 to rotate to engage with the locking fastener 30.

[0035] It should be noted that the reset component is a boss 61 installed on the housing 60 of the circuit breaker. The boss 61 can be integrally injection molded with the housing 60. The root of the connection between the boss 61 and the housing 60 can be reinforced with a reinforcing rib to prevent the boss 61 from breaking due to long-term contact and stress with the connecting rod 40. The side of the first rod 41 facing the boss 61 is arc-shaped so that the boss 61 and the first rod 41 form a point contact. The connecting rod body is bent towards the side closer to the reset component, so that the connecting rod body and the reset component can contact and cooperate, ensuring that the force of the reset component is efficiently converted into the driving torque of the connecting rod 40, and also preventing the connecting rod body from affecting the closing process of the circuit breaker. When the circuit breaker is opened, the boss 61 applies force through contact with the first rod 41, pushing the connecting rod 40 to break through the dead point and driving the second folding arm to slide to the limit position (i.e., the end of the waist-shaped hole 22 away from the connecting hole 21), so that the trip fastener 20 and the locking fastener 30 are fully engaged, completing the mechanical self-locking.

[0036] As one possible implementation method, such as Figures 5 to 8 As shown, in some other embodiments, the reset member is a limiting surface 71 provided on the contact seat 70 or mechanism seat 10 of the circuit breaker. The limiting surface 71 contacts the second folding arm to drive the connecting rod 40 to rotate, so that the second folding arm slides from the end of the waist-shaped hole 22 near the connecting hole 21 to the end away from the connecting hole 21, while driving the jump fastener 20 to rotate to engage with the locking fastener 30.

[0037] It should be noted that the reset component is the limiting surface 71 set on the contact seat 70 or mechanism seat 10 of the circuit breaker. The limiting surface 71 can be integrally formed on the side of the contact seat 70 or mechanism seat 10 near the trip fastener 20. The limiting surface 71 can be a plane or an arc surface. The end of the second folding arm can be designed as a cylinder to form a line contact with the limiting surface 71, which ensures contact stability and reduces the friction area. The starting end of the limiting surface 71 should be located at a preset distance (such as 0.5~2mm) before the dead point of the movement trajectory of the second folding arm. When the second folding arm rotates to this position with the connecting rod 40, it begins to contact the limiting surface 71 to ensure that the driving force is provided in time before the connecting rod 40 moves to the dead point.

[0038] like Figures 5 to 8 As shown, taking the limiting surface 71 as a plane as an example, when the circuit is opened, the limiting surface 71 applies a normal reaction force perpendicular to the contact surface of the two through sliding contact with the second folding arm. This force can be decomposed into two components: one component is along the length direction D of the waist-shaped hole 22 to push the second folding arm to slide in the waist-shaped hole 22, and the other component is along the rotation direction of the connecting rod 40 to provide the driving torque to break through the dead point. Under the action of this force, the connecting rod 40 smoothly passes the dead point, and the second folding arm slides quickly from the end of the waist-shaped hole 22 near the connecting hole 21 to the limit position (the sliding speed gradually increases with the curvature of the limiting surface 71).

[0039] As one possible implementation method, such as Figure 6 As shown, the angle between the second connecting line A and the normal B of the limiting surface 71 is α, and satisfies 12°<α<45°.

[0040] It should be noted that the second line A formed by the second end and the first end of the connecting rod 40 represents the force direction axis of the connecting rod 40; the normal B of the limiting surface 71 refers to the straight line perpendicular to the limiting surface 71 and the contact surface of the second folding arm (pointing to the center of curvature of the limiting surface 71); the angle between the second line A and the normal B of the limiting surface 71 is α, and satisfies 12°<α<45°. When α≤12°, the component force pushing the second folding arm to slide in the waist-shaped hole 22 along the length direction D of the waist-shaped hole 22 is small, which easily leads to the second folding arm sliding slowly or even getting stuck in the waist-shaped hole 22. When α is greater than or equal to 45°, the component force driving the connecting rod 40 to break through the dead point along the rotation direction of the connecting rod 40 is small, which easily leads to the connecting rod 40 being unable to pass the dead point and getting stuck.

[0041] As one possible implementation method, such as Figure 9 As shown, the center of the connecting hole 21 and the center of the waist-shaped hole 22 near the end of the connecting hole 21 form a third line C. The angle between the third line C and the length direction D of the waist-shaped hole 22 is β, and satisfies 15°≤β≤45°.

[0042] It should be noted that the center of the connecting hole 21 and the center of the end of the waist-shaped hole 22 near the connecting hole 21 form a third line C, which represents the spatial relationship between the rotation center of the jump fastener 20 and the initial point of action of the connecting rod 40; the length direction D of the waist-shaped hole 22 is the sliding trajectory direction of the second folding arm; the angle between the third line C and the length direction D of the waist-shaped hole 22 is β, and satisfies 15°≤β≤45°. When β is less than 15°, the initial driving force arm of the connecting rod 40 on the jump fastener 20 is too small, resulting in the jump fastener 20 rotating slowly. When β is greater than 45°, the axial component of the force of the connecting rod 40 on the second folding arm (along the length direction D of the waist-shaped hole 22) decreases, and the radial component (perpendicular to the direction of the waist-shaped hole 22) increases. The radial component will cause the second folding arm to be squeezed between the hole wall of the waist-shaped hole 22, and the sliding friction resistance will increase significantly, which may cause the second folding arm to slide slowly or even get stuck in the waist-shaped hole 22.

[0043] As one possible implementation method, such as Figure 9 As shown, the shape of the connecting hole 21 is circular or oblong.

[0044] It should be noted that when the connecting hole 21 is circular, it forms a "clearance fit" with the mounting shaft 11, allowing only the jump fastener 20 to rotate around the mounting shaft 11 without any radial or axial movement, ensuring that the rotation trajectory of the jump fastener 20 is precise and controllable. When the connecting hole 21 is oblong, it forms a "sliding + rotating" composite connection with the mounting shaft 11, allowing the jump fastener 20 to rotate around the mounting shaft 11 and slide along the length direction D of the connecting hole 21, achieving flexible compensation of the movement trajectory and further ensuring that the jump fastener 20 can smoothly pass the dead point.

[0045] This application also provides a circuit breaker including the aforementioned operating mechanism. Since the structure and beneficial effects of the operating mechanism have been described in detail in the foregoing embodiments, they will not be repeated here.

[0046] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0047] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. An operating mechanism, characterized in that, The circuit includes a mechanism base (10), a jump fastener (20), a locking fastener (30), a connecting rod (40), and a handle (50). The jump fastener (20) and the locking fastener (30) are rotatably mounted on the mechanism base (10). The first end of the connecting rod (40) is hinged to the handle (50), and the second end is connected to the jump fastener (20). A reset member is provided on the movement path of the connecting rod (40). When the circuit is opened, the handle (50) drives the connecting rod (40) to rotate until it contacts the reset member. The reset member is used to drive the connecting rod (40) to rotate so that the jump fastener (20) and the locking fastener (30) overlap.

2. The operating mechanism according to claim 1, characterized in that, The mechanism base (10) is provided with an installation shaft (11), and the jump fastener (20) is provided with a connecting hole (21) and a waist-shaped hole (22). The installation shaft (11) passes through the connecting hole (21), and the second end of the connecting rod (40) passes through the waist-shaped hole (22). The installation shaft (11) and the second end of the connecting rod (40) form a first connecting line (E), and the second end of the connecting rod (40) and the first end form a second connecting line (A). When the connecting rod (40) rotates to the point where the angle between the first connecting line (E) and the second connecting line (A) is ±10°, the reset member contacts the connecting rod (40) to drive the connecting rod (40) to rotate, so that the second end of the connecting rod (40) slides in the waist-shaped hole (22), and at the same time drives the jump fastener (20) to rotate around the installation shaft (11) to overlap with the locking member (30).

3. The operating mechanism according to claim 2, characterized in that, The connecting rod (40) has a U-shaped structure, and the handle (50) is provided with a mounting hole (51). The first folding arm of the U-shaped structure passes through the mounting hole (51), and the second folding arm passes through the waist-shaped hole (22). The connecting rod body connecting the first folding arm and the second folding arm is bent toward the side closer to the reset member.

4. The operating mechanism according to claim 3, characterized in that, The connecting rod body includes a first rod (41) and a second rod (42). The first folding arm, the first rod (41), the second rod (42) and the second folding arm are connected in sequence, and there is a preset angle between the first rod (41) and the second rod (42).

5. The operating mechanism according to claim 4, characterized in that, The reset member is a boss (61) provided on the housing (60) of the circuit breaker. The boss (61) contacts the first rod body (41) to drive the connecting rod (40) to rotate, so that the second folding arm slides from the end of the waist-shaped hole (22) near the connecting hole (21) to the end away from the connecting hole (21), while driving the jump fastener (20) to rotate to overlap with the locking fastener (30).

6. The operating mechanism according to claim 4, characterized in that, The reset component is a limiting surface (71) provided on the contact seat (70) of the circuit breaker or the mechanism seat (10). The limiting surface (71) contacts the second folding arm to drive the connecting rod (40) to rotate, so that the second folding arm slides from the end of the waist-shaped hole (22) near the connecting hole (21) to the end away from the connecting hole (21), while driving the jump fastener (20) to rotate to overlap with the locking fastener (30).

7. The operating mechanism according to claim 6, characterized in that, The angle between the second connecting line (A) and the normal (B) of the limiting surface (71) is α, and satisfies 12° < α < 45°.

8. The operating mechanism according to claim 2, characterized in that, The center of the connecting hole (21) and the center of the waist-shaped hole (22) near the end of the connecting hole (21) form a third line (C). The angle between the third line (C) and the length direction (D) of the waist-shaped hole (22) is β, and satisfies 15°≤β≤45°.

9. The operating mechanism according to claim 2, characterized in that, The connecting hole (21) is circular or oblong in shape.

10. A circuit breaker, characterized in that, Includes the operating mechanism described in any one of claims 1 to 9.

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