Operating mechanism of circuit breaker and circuit breaker

Abstract

The application relates to the low-voltage electrical field, in particular to an operating mechanism of a circuit breaker, wherein a second connecting rod assembly comprises a second crank pivotally arranged around a tenth shaft, a third connecting rod and a third crank pivotally arranged around an eleventh shaft, the second crank is rotationally connected with the third connecting rod through an eighth shaft, the third connecting rod is rotationally connected with the third crank through a ninth shaft, a first connecting rod assembly is rotationally connected with the second crank through a seventh shaft, and the shafts and the shafts are arranged in parallel and at intervals; the tenth shaft or the eleventh shaft coincides with the rotating shaft of a movable contact mechanism, and the eighth shaft or the ninth shaft is rotationally connected with the movable contact mechanism for driving the movable contact mechanism to rotate; the operating mechanism provides multiple connection modes with the movable contact mechanism, facilitating the design of a contact system of the circuit breaker; the application also relates to a circuit breaker comprising the operating mechanism, and the position relationship between the operating mechanism and the movable contact mechanism can be flexibly adjusted according to requirements.

Description

Technical Field

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

[0002] Existing circuit breakers have fixed connections and relative positions between their operating mechanisms and contact systems, which imposes limitations on the design of the contact system.

[0003] With the continuous improvement of power systems, the voltage requirements for circuit breakers are also increasing. In order to meet the requirements of circuit breakers to break high voltages, this is often achieved by increasing the opening distance between the moving and stationary contacts. There are generally two design schemes as follows:

[0004] Option 1, increasing the length of the moving contact arm, has the following drawbacks: In order to ensure reliable connection between the moving and stationary contacts, sufficient pressure is required between them. As the moving contact arm is lengthened, the required contact spring force will increase dramatically, and consequently, the force of the operating mechanism spring will also increase dramatically. At the same time, the increase in operating force reduces the service life of the circuit breaker.

[0005] Option 2 involves adjusting the existing four-bar linkage to increase the opening distance. However, due to the high correlation between the links in the four-bar linkage, if the contact support rotates a larger angle when the driving contact is disconnected, the jumper and upper linkage also need to rotate a larger angle. The rotation angle of the jumper is directly related to the latch and handle, resulting in the handle and latch needing to rotate a larger angle, which places higher demands on space. In addition, the length, position, and elasticity of the spring that matches the jumper will change, and a larger rotation angle of the jumper will also slow down the movement speed of the entire mechanism. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an operating mechanism for a circuit breaker, offering multiple ways to connect with the moving contact mechanism, facilitating the design of the circuit breaker's contact system; it also provides a circuit breaker with an operating mechanism that allows for flexible adjustment of the positional relationship between the operating mechanism and the moving contact mechanism as needed.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An operating mechanism for a circuit breaker includes a mechanism support, a tripping fastener, a locking fastener, and a rocker arm assembly pivotally mounted on the mechanism support, an energy storage spring, a first crank, and a first connecting rod assembly. The locking fastener engages with the tripping fastener. One end of the first crank is rotatably connected to the tripping fastener, and the other end is rotatably connected to the first connecting rod assembly via a fifth shaft. One end of the energy storage spring is connected to the fifth shaft, and the other end is rotatably connected to the rocker arm assembly. The operating mechanism further includes a second connecting rod assembly, which comprises a second crank pivotally mounted about a tenth axis, a third connecting rod, and a third crank pivotally mounted about an eleventh axis. The second crank is also rotatably connected to the third connecting rod via the eighth shaft, and the third connecting rod is also rotatably connected to the third crank via the ninth shaft. The first connecting rod assembly is also rotatably connected to the second crank via the seventh shaft. The tenth shaft, the eighth shaft, the ninth shaft, and the eleventh shaft are arranged in parallel and spaced apart, and the seventh shaft is arranged in parallel and spaced apart from the tenth shaft. The tenth shaft coincides with the rotation axis of the moving contact mechanism of the circuit breaker, and the eighth shaft is driven to rotate the moving contact mechanism; or, the eleventh shaft coincides with the rotation axis of the moving contact mechanism, and the ninth shaft is driven to rotate the moving contact mechanism.

[0009] Preferably, the second crank is pivotally mounted on the mechanism support or the circuit breaker housing of the circuit breaker about the tenth axis, and the third crank is pivotally mounted on the mechanism support or the circuit breaker housing about the eleventh axis; one end of the second crank is pivotally mounted on the mechanism support about the tenth axis, and the other end is rotatably connected to one end of the third connecting rod through the eighth axis; the seventh axis is located between the two ends of the second crank; the other end of the third connecting rod is rotatably connected to one end of the third crank through the ninth axis; and the other end of the third crank is pivotally mounted on the mechanism support about the eleventh axis.

[0010] Preferably, the tenth axis, the eighth axis, the ninth axis, and the eleventh axis are located at the four vertices of a parallelogram.

[0011] Preferably, the first linkage assembly includes a first linkage, a slider, and a second linkage, and the operating mechanism further includes a slide rail; the first crank is rotatably connected to one end of the first linkage via a fifth shaft, the other end of the first linkage is rotatably connected to the slider, the slider is also rotatably connected to one end of the second linkage, the other end of the second linkage is rotatably connected to the second crank via a seventh shaft, and the slider is slidably disposed within the slide rail.

[0012] Preferably, the slide rail is mounted on the mechanism support or on the circuit breaker housing.

[0013] Preferably, when the operating mechanism is in the open or tripped state, the slider and the slide rail are limited to prevent the slider from sliding.

[0014] Preferably, the slider includes a sliding shaft and a track block, with a track block at each end of the sliding shaft, and each track block is engaged with a sliding rail for sliding limit.

[0015] Preferably, the two ends of the swing stroke of the rocker arm assembly are the first end of the stroke and the second end of the stroke, respectively, and the two ends of the energy storage spring connected to the rocker arm assembly and the fifth shaft are the first end of the spring and the second end of the spring, respectively.

[0016] When the operating mechanism is in the closed state, the rocker arm assembly swings to the second end of the stroke and drives the first end of the spring to rotate around the second end of the spring. When the energy storage spring rotates past the first dead point, the energy storage spring drives the first crank to rotate in the second direction and drives the rocker arm assembly to swing to the second end of the stroke. The first crank drives the slider to slide along the slide rail to its limit engagement through the first connecting rod, preventing the first crank from rotating in the second direction. The operating mechanism then switches to the open state.

[0017] When the operating mechanism is in the open state, the rocker arm assembly swings to the first end of the stroke and drives the first end of the spring to rotate around the second end of the spring. When the energy storage spring passes the first dead point, the energy storage spring drives the first crank to rotate in the first direction, so that the crank limiting part of the first crank engages with the jump fastener to prevent the first crank from rotating in the first direction. At the same time, the energy storage spring drives the rocker arm assembly to swing to the first end of the stroke, and the operating mechanism switches to the closed state. The first direction and the second direction are opposite to each other.

[0018] Preferably, the operating mechanism further includes a re-fastener pivotally mounted on the mechanism support, the re-fastener being engaged with the locking fastener for limiting the engagement;

[0019] When the operating mechanism is in the closed state, the fastener rotates to release its limit engagement with the locking fastener, the locking fastener rotates to release its locking engagement with the jump fastener, the jump fastener rotates and drives the first crank to rotate synchronously, the first crank drives the slider to slide along the slide rail through the first connecting rod until it engages with the slide rail limit engagement to prevent the jump fastener from continuing to rotate, the energy storage spring drives the rocker arm assembly to swing to the second end of the stroke until the rocker arm assembly's reset structure engages with the jump fastener limit engagement, and the operating mechanism switches to the disengaged state;

[0020] When the operating mechanism is in the disengaged state, the rocker arm assembly swings to the second end of its stroke. At the same time, the rocker arm assembly drives the trip fastener to rotate and engage with the locking fastener through the reset structure. Simultaneously, the locking fastener rotates to engage with the re-fastener limit position, and the operating mechanism switches to the open state.

[0021] Preferably, the mechanism support includes a seventh axis clearance groove, the shape of which matches the movement trajectory of the seventh axis.

[0022] A circuit breaker comprising the aforementioned operating mechanism.

[0023] The operating mechanism of the circuit breaker of the present invention, with its second linkage assembly, realizes multiple connection methods between the operating mechanism and the moving contact mechanism, so that the positional relationship between the operating mechanism and the moving contact mechanism can be set according to actual needs, so that it can be applied to more working scenarios, and can make full use of the space of the circuit breaker, making the overall structure of the circuit breaker more compact.

[0024] Furthermore, in the operating mechanism, the first crank, the first connecting rod, the slide rail, and the slider form a crank-slider mechanism, which allows the operating mechanism to perform closing, opening, and tripping operations without connecting to the moving contact mechanism. This facilitates the testing and modular production of the operating mechanism and avoids wear and tear on the moving contact caused by testing the operating mechanism. Moreover, the crank-slider mechanism allows the tripping fastener to achieve a large opening distance with only a small rotation angle. The presence of the slider reduces the spring force of the mechanism, thereby reducing the required handle operating force and making the circuit breaker's opening and closing operations easier.

[0025] Furthermore, the slide rail is mounted on the side plate of the support of the mechanism bracket, making the operating mechanism an independently operable mechanism. This facilitates the modular assembly and production of the operating mechanism and allows for more design space for the distribution of the operating mechanism within the circuit breaker housing.

[0026] The circuit breaker of the present invention includes the operating mechanism, which can flexibly adjust the positional relationship between the operating mechanism and the moving contact mechanism as needed. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structural principle of the operating mechanism of the present invention, which is in the closed state;

[0028] Figure 2 This is a schematic diagram of the structural principle of the operating mechanism of the present invention, which is in the open state;

[0029] Figure 3 This is a schematic diagram of the structural principle of the operating mechanism of the present invention, which is in the disengaged state;

[0030] Figure 4 This is a schematic diagram of the structural principle of the circuit breaker of the present invention, which is in the closed state;

[0031] Figure 5 This is a schematic diagram of the structural principle of the circuit breaker of the present invention, which is in the open state;

[0032] Figure 6 This is a schematic diagram of the structural principle of the circuit breaker of the present invention, which is in the tripped state;

[0033] Figure 7 This is a schematic diagram of the circuit breaker of the present invention, which at least shows the assembly relationship between the operating mechanism and the circuit breaking pole;

[0034] Figure 8 This is a three-dimensional structural diagram of the assembly of the operating mechanism and the circuit breaker of the present invention;

[0035] Figure 9 This is a schematic diagram of the operating mechanism of the present invention;

[0036] Figure 10 This is a side projection diagram of the operating mechanism and the circuit breaker pole after assembly of the present invention, with the operating mechanism in the closed state;

[0037] Figure 11 This is a side projection diagram of the operating mechanism and the circuit breaker pole after assembly of the present invention, with the operating mechanism in the open state;

[0038] Figure 12 This is a side projection diagram of the operating mechanism and the circuit breaker pole after assembly of the present invention, with the operating mechanism in the disengaged state;

[0039] Figure 13 This is a schematic diagram of the circuit breaking electrode of the present invention, showing at least the internal structure of the moving contact mechanism, in which the moving contact mechanism and the stationary contact are in a closed state;

[0040] Figure 14 This is a schematic diagram of the circuit breaking electrode of the present invention, in which the moving contact mechanism and the stationary contact are in a disconnected state;

[0041] Figure 15 This is a side projection diagram of the operating mechanism and the circuit breaker electrode after assembly. The rotation axis of the moving contact mechanism coincides with the eighth axis. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-15 The given embodiments further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0043] like Figure 4-8 As shown in Figures 10-12 and 15, the circuit breaker of the present invention includes an operating mechanism 100 and at least one breaking pole 300. Each breaking pole 300 includes a contact system, which includes a moving contact mechanism 1c and a stationary contact 18 that cooperate with each other. The operating mechanism 100 is driven to rotate the moving contact mechanism 1c, thereby closing or opening the moving contact mechanism 1c and the stationary contact 18.

[0044] like Figure 7 As shown, the circuit breaker of the present invention is preferably a multi-pole circuit breaker, including multiple breaking poles 300 arranged side by side, and the moving contact mechanisms 100 of the multiple breaking poles 300 are linked. Furthermore, the circuit breaker of the present invention also includes a circuit breaker housing, which has at least two implementation methods:

[0045] Method 1: Each of the circuit breaker poles 300 includes a unit housing 120, and the contact system is disposed within the unit housing 120; the circuit breaker of the present invention also includes a circuit breaker housing 3, and multiple unit housings 120 are disposed side by side within the circuit breaker housing 3; the operating mechanism 100 is mounted across one of the circuit breaker poles 300.

[0046] Method 2: The circuit breaker of the present invention also includes a circuit breaker housing 3. Each circuit breaker pole 300 does not have an independent housing. Instead, an insulating partition is provided between adjacent circuit breaker poles 300. The insulating partition divides the internal space of the circuit breaker housing 3 into multiple mounting cavities for setting the circuit breaker poles 300.

[0047] The circuit breaker of the present invention preferably adopts the circuit breaker housing of the first type.

[0048] Specifically, such as Figure 7 As shown, the circuit breaker of this invention is a three-phase circuit breaker, comprising three parallel-arranged breaking poles 300 (each used to connect or disconnect the three-phase power circuit), and an operating mechanism 100 mounted on the middle breaking pole 300. The moving contact mechanisms of the three breaking poles 300 are linked (the moving contact mechanisms 1c of the three breaking poles 300 are linked via an eighth axis 5 or a ninth axis 6). Of course, the number of breaking poles 300 can be adjusted according to actual needs. For example, there can be two breaking poles 300 for use with a two-phase power supply; or four breaking poles 300 for a three-phase four-wire circuit; or one breaking pole 300 for use with a single-phase circuit.

[0049] Preferred, such as Figure 7 As shown, the operating mechanism 100 is connected to the unit housing 120 of each circuit breaker 300 via a first connecting shaft 4a and a second connecting shaft 4b, respectively, with the first connecting shaft 4a and the second connecting shaft 4b arranged in parallel at intervals.

[0050] like Figure 1-15As shown, the operating mechanism 100 includes a mechanism support 50, a jump fastener 60, a locking fastener 13, and a rocker arm assembly pivotally mounted on the mechanism support 50, an energy storage spring 22, a first crank 30, and a first connecting rod assembly; the locking fastener 13 engages with the jump fastener 60, one end of the first crank 30 is rotatably connected to the jump fastener 60, and the other end is rotatably connected to the first connecting rod assembly via a fifth shaft 16, one end of the energy storage spring 22 is connected to the fifth shaft 16, and the other end is rotatably connected to the rocker arm assembly; the operating mechanism also includes a second connecting rod assembly, which includes a second crank 19 pivotally mounted around a tenth axis 111s, a third connecting rod 35, and a third crank 36 pivotally mounted around an eleventh axis 119s. 19 is also rotatably connected to the third link 35 via the eighth shaft 5, and the third link 35 is also rotatably connected to the third crank 36 via the ninth shaft 6. The first link assembly is also rotatably connected to the second crank 19 via the seventh shaft 21. The tenth shaft 111s, the shaft of the eighth shaft 5, the shaft of the ninth shaft 6, and the eleventh shaft 119s are arranged in parallel and spaced apart. The shaft of the seventh shaft 21 is arranged in parallel and spaced apart from the tenth shaft 111s. The tenth shaft 111s coincides with the rotation axis of the moving contact mechanism 1c of the circuit breaker, and the eighth shaft 5 is driven to the moving contact mechanism 1c to drive its rotation. Alternatively, the eleventh shaft 119s coincides with the rotation axis of the moving contact mechanism 1c, and the ninth shaft 6 is driven to the moving contact mechanism 1c to drive its rotation.

[0051] The operating mechanism of the circuit breaker of the present invention, with its second linkage assembly, realizes multiple connection methods between the operating mechanism and the moving contact mechanism, so that the positional relationship between the operating mechanism and the moving contact mechanism can be set according to actual needs, so that it can be applied to more working scenarios, and can make full use of the space of the circuit breaker, making the overall structure of the circuit breaker more compact.

[0052] Specifically, such as Figure 1-14 As shown, the tenth axis 111s coincides with the rotation axis of the moving contact mechanism 1c of the circuit breaker, and the eighth axis 5 is drivenly connected to the moving contact mechanism 1c to drive its rotation. Figure 15 As shown, the eleventh axis 119s coincides with the rotation axis of the moving contact mechanism 1c, and the ninth axis 6 is driven to rotate by the moving contact mechanism 1c.

[0053] like Figure 1-15As shown, this is one embodiment of the second connecting rod assembly. The rotation axis of the moving contact mechanism 1c can be connected to different positions as needed: one end of the second crank 19 is pivotally mounted on the mechanism support 50 about the tenth axis 111s, and the other end is rotatably connected to one end of the third connecting rod 35 through the eighth axis 5. The seventh axis 21 is located between the two ends of the second crank 19. The other end of the third connecting rod 35 is rotatably connected to one end of the third crank 36 through the ninth axis 6, and the other end of the third crank 36 is pivotally mounted on the mechanism support 50 about the eleventh axis 119s. It should be noted that the connection between the first connecting rod assembly and the second crank 19 only needs not to coincide with the tenth axis 111s.

[0054] In another embodiment of the second connecting rod assembly, the difference from the above embodiment is that the second crank 19 is pivotally mounted on the circuit breaker housing about the tenth axis 111s, and the third crank 36 is pivotally mounted on the circuit breaker housing about the eleventh axis 119s. Specifically, the second crank 19 is pivotally mounted on the unit housing 120 or the insulating partition about the tenth axis 111s, and the third crank 36 is pivotally mounted on the unit housing 120 or the insulating partition about the eleventh axis; the unit housing 120 or the insulating partition is provided with blind holes for mating with the tenth axis 111 and the eleventh axis 119.

[0055] Preferred, such as Figure 1-15 As shown, the tenth axis 111s, the axis of the eighth axis 5, the axis of the ninth axis 6, and the eleventh axis 119s are located at the four vertices of a parallelogram; during the operation of the second connecting rod assembly, the second crank 19 and the third crank 36 always remain parallel; the third connecting rod 35 always remains parallel to the line connecting the tenth axis 111s and the eleventh axis 119s; the motion trajectories of the eighth axis 5 and the ninth axis 6 are the same (they do not overlap).

[0056] like Figure 9 and 15 As shown, the two sets of the second link assemblies are symmetrically arranged, which can be achieved in at least the following two ways:

[0057] Method 1: For example Figure 9As shown, the mechanism support 50 includes two support side plates arranged opposite each other, located on both sides of a unit housing 120. Two sets of second connecting rod assemblies are respectively arranged on both sides of the two support side plates. The two second cranks 19 are respectively rotatably connected to the first connecting rod assembly through two seventh shafts 21. Each support side plate is provided with a seventh shaft clearance groove 50-21 for avoiding the seventh shaft 21. The shape of the seventh shaft clearance groove 50-21 matches the movement trajectory of the seventh shaft 21. The rotation axis of the moving contact mechanism 1c coincides with the tenth axis 111s. The third link 35 is rotatably connected to two second cranks 19 via an eighth shaft 5. The eighth shaft 5 passes through the contact support 110 of the moving contact mechanism 1c to drive the moving contact mechanism 1c to rotate. The two third links 35 are rotatably connected to two third cranks 36 via two ninth shafts 6. The two third cranks 36 are pivotally mounted on two support side plates via two eleventh shafts 119. The unit housing 120 is provided with a unit housing clearance groove 120-5 for avoiding the eighth shaft 5. The shape of the unit housing clearance groove 120-5 matches the motion trajectory of the eighth shaft 5.

[0058] Method 2: For example Figure 15 As shown, the difference from Method 1 is that the rotation axis of the moving contact mechanism 1c coincides with the eleventh axis 119s, and the two third connecting rods 35 are rotatably connected to the two second cranks 19 respectively through two eighth shafts 5; the two third connecting rods 35 are rotatably connected to the two third cranks 36 respectively through a ninth shaft 6, and the ninth shaft 6 passes through the contact support 110 of the moving contact mechanism 1c to drive the moving contact mechanism 1c to rotate; the unit housing 120 is provided with a unit housing clearance groove 120-5 for avoiding the ninth shaft 6, and the shape of the unit housing clearance groove 120-5 matches the motion trajectory of the ninth shaft 6.

[0059] Of course, in Method 1 and Method 2, if the circuit breaker 300 does not have a unit housing 120, but instead has an insulating partition between adjacent circuit breakers 300, then the insulating partition has an insulating partition clearance groove for avoiding the eighth axis 5 or the ninth axis 6, and the shape of the insulating partition clearance groove matches the movement trajectory of the eighth axis 5 or the ninth axis 6.

[0060] like Figure 1-6As shown, the first linkage assembly includes a first linkage 27, a slider 26, and a second linkage 29. The operating mechanism 100 also includes a slide rail 25. The first crank 30 is rotatably connected to one end of the first linkage 27 via a fifth shaft 16. The other end of the first linkage 27 is rotatably connected to the slider 26. The slider 26 is also rotatably connected to one end of the second linkage 29. The other end of the second linkage 29 is rotatably connected to the second crank 19 via a seventh shaft 21. The slider 26 is slidably disposed within the slide rail 25. When the operating mechanism 100 is in the open or tripped state, the slider 26 is limited by the slide rail 25 to prevent the slider 26 from sliding, so that the operating mechanism 100 can be stably in the open or tripped state without the need for the moving contact mechanism 1c. In the operating mechanism 100, the first crank 30, the first connecting rod 27, the slide rail 25, and the slider 26 form a crank-slider mechanism, which allows the operating mechanism 100 to perform closing, opening, and tripping operations without connecting to the moving contact mechanism 1c. This facilitates the testing and modular production of the operating mechanism 100, avoids the need to install the moving contact mechanism when testing the operating mechanism 100, and also avoids the wear and tear on the moving contact.

[0061] Preferably, when the slide rail 25 has a groove-shaped structure, it can be disposed on the inner wall of the bracket 50 or the inner wall of the unit housing 120 (when the circuit breaker 300 is not provided with the unit housing 120, an insulating partition is provided between adjacent circuit breakers 300, and the slide rail 25 is disposed on the side wall of the insulating partition). The slide rail 25 does not penetrate the bracket 50 or the unit housing 120 (or the insulating partition) in the thickness or depth direction. Further, the two ends of the slide rail 26 are respectively disposed in the two slide rails 25, and the end of the first connecting rod 27 connected to the slider 26 and the end of the second connecting rod 29 connected to the slider 26 are both disposed in the space between the two slide rails 25.

[0062] Preferably, when the slide rail 25 has a perforated structure, it can be disposed on the inner sidewall of the bracket 50 (e.g., Figure 1-6 As shown in Figures 10-12 and 15, or on the inner wall of the unit housing 120 (when the circuit breaker 300 is not provided with a unit housing 120, an insulating partition is provided between adjacent circuit breakers 300, and the slide rail 25 is provided on the side wall of the insulating partition), the slide rail 25 penetrates the bracket 50 or the unit housing 120 (or the insulating partition) in the thickness or depth direction. Further, as shown in Figures 10-12 and 15, the slide rail 25 penetrates the bracket 50 or the unit housing 120 (or the insulating partition) in the thickness or depth direction. Figure 9 As shown, the two ends of the slider 26 pass through the two slide rails 25 respectively. The end of the first connecting rod 27 connected to the slider 26 is located between the two slide rails 25. The ends of the two second connecting rods 29 connected to the slider 26 are located on both sides of the two slide rails 25 respectively, and are rotatably connected to the two ends of the slider 26 respectively.

[0063] Preferably, the slide rail 25 is straight, arc-shaped, triangular, or a combination of straight and arc-shaped. Furthermore, the shape of the slide rail 25 can also be adapted to the current rating of the circuit breaker, design space, and control requirements. Figure 1-6 As shown, when the circuit breaker (or operating mechanism 100) opens or trips, the slider 26 moves upward along the slide rail 25. When the circuit breaker closes, the slider 26 moves downward along the slide rail 25. The upward and downward trajectories coincide. In this case, it can be set to a straight, arc, or a combination of straight and arc shapes. The slide rail 25 can also be set to other shapes such as a triangle. For example, if the slide rail 25 is set to a triangle, when the circuit breaker opens or trips, the slider 26 moves upward along one side of the triangle's movement trajectory along the slide rail 25. When the circuit breaker closes, the slider 26 moves downward along the other side of the triangle's movement trajectory along the slide rail 25. The downward and upward movement trajectories do not coincide (not shown in the figure). When the operating mechanism switches states, the slider 26 forms a closed movement trajectory along the slide rail 25.

[0064] like Figure 9 As shown, this is one embodiment of the slide rail 25 and slider 26: the mechanism support 50 includes two support side plates arranged relatively apart, each support side plate is provided with a slide rail 25, and the slider 26 is slidably mounted on the two slide rails 25 at both ends. Further, as... Figure 9 As shown, the slide rail 25 is a sliding hole, and the slider 26 is a sliding shaft with its two ends respectively disposed in the two sliding holes. Further, as... Figure 9-12 As shown, the slide rail 25 is a straight hole, and the slider 26 includes a sliding shaft and a track block. Each end of the sliding shaft has a track block, and each track block is disposed within a slide rail 25 and its sliding limit is engaged. The slide rail 25 is disposed on the side plate of the support of the mechanism bracket 50, making the operating mechanism 100 an independently operable mechanism. This facilitates the modular assembly and production of the operating mechanism 100 and provides more design space for the distribution of the operating mechanism 100 within the circuit breaker housing 3.

[0065] like Figure 1-6As shown in Figures 10-12 and 15, the operating mechanism 100 further includes a re-fastening member 15 pivotally mounted on the mechanism support 50, which engages with the locking member 13 in a limiting engagement. Furthermore, the circuit breaker of the present invention also includes an overload and short-circuit protection mechanism. When a short circuit or overload fault occurs in the circuit breaker, the overload and short-circuit protection mechanism drives the re-fastening member 15 to rotate, thereby releasing the limiting engagement between the re-fastening member 15 and the locking member 13. Further, the short-circuit and overload protection mechanism includes a short-circuit protection mechanism and an overload protection mechanism. The short-circuit protection mechanism is preferably an electromagnetic trip unit, and the overload protection mechanism is preferably a thermal trip mechanism (e.g., the overload protection mechanism includes a bimetallic strip). It should be noted that the engagement between the locking member 13 and the tripping member 60, the engagement between the locking member 13 and the re-fastening member 15, and the engagement between the re-fastening member 15 and the short-circuit and overload protection mechanism can all be achieved using existing technologies, and will not be elaborated upon here.

[0066] like Figure 8 and 9 As shown, this is one embodiment of the rocker arm assembly: the rocker arm assembly includes a synchronously moving handle 41, a rocker arm 45 fixedly connected to the handle 41, and a reset structure 42 for driving the jump fastener 60 to rotate so that it re-engages with the locking fastener 13. The rocker arm 45 is pivotally mounted on the mechanism support 50, and the rocker arm 45 is respectively limited to the mechanism support 50 at both ends of the rocker arm assembly's swing stroke. Further, as... Figure 8 and 9 As shown, the reset structure 42 is a reset shaft, and the jump fastener 60 is a strip structure. One end is locked with the locking fastener 13, and the other end is pivotally mounted on the mechanism support 50 around the first axis 11s (preferably pivotally mounted on the mechanism support 50 through the first axis 11). The jump fastener 60 includes a driving side edge that is disposed at one of its edges and drives the reset structure 42.

[0067] like Figure 1-6 As shown in Figures 9 and 1, one end of the energy storage spring 22 is connected to the fifth shaft 16, and the other end is rotatably connected to the rocker arm 45 of the rocker arm assembly through the fourth shaft 46.

[0068] like Figure 1-6 As shown, this is one embodiment of the first crank 30: the first crank 30 has a triangular structure, with one vertex rotatably connected to the jump fastener 60 via the sixth shaft 67, another vertex rotatably connected to one end of the first spring 22 and the first connecting rod 27 via the fifth shaft 16, and a crank limiting part 31 provided at the third vertex. Furthermore, two first cranks 30 are respectively disposed on both sides of the jump fastener 60, and the three vertices of the two first cranks 30 are connected via the sixth shaft 67, the fifth shaft 16, and the crank limiting part 31, respectively.

[0069] like Figure 10-12As shown in Figure 15, the mechanism support 50 includes a V-groove, and the rocker arm 45 is respectively positioned and engaged with the two side walls of the V-groove at the first and second ends of its travel. Further, as... Figure 9 As shown, the mechanism support 50 includes support side plates and support connecting plates arranged at relatively intervals. The two ends of the support connecting plate are bent and connected to the two support side plates respectively, making the mechanism support 50 have an overall U-shaped structure. Each support side plate is provided with a V-shaped groove; as shown... Figure 1-6 As shown, the rocker arm 45 includes a pair of rocker arm legs spaced apart from each other, respectively disposed in two V-grooves and rotatably mounted on two support side plates around the twelfth axis 28s (e.g. Figure 9 As shown, the two rocker arm supports are preferably rotatably connected to the two support side plates via the twelfth axis 28.

[0070] The following will combine Figure 1-3 As shown in Figures 4-6 and 10-12, the process of switching the operating mechanism 100 between the open state, the closed state, and the tripped state is described below:

[0071] The rocker arm assembly (rocker arm 45) has a first stroke end and a second stroke end at its two ends of its swing stroke, respectively; the energy storage spring 22 has a first spring end and a second spring end at its two ends, respectively, which are connected to the rocker arm assembly and the first crank 30. Specifically, as shown... Figure 1-3 As shown in directions 4-6 and 10-12, the first end and the second end of the stroke of the rocker arm assembly are the right end and the left end of the swing stroke of the rocker arm assembly, respectively, and the upper and lower ends of the energy storage spring 22 are the first end and the second end of the spring, respectively.

[0072] The following will combine Figure 1-2 As shown in Figures 4-5 and 10-11, the operation process of the operating mechanism 100 switching from the closed state to the open state is described: Figure 1 , 4 As shown in Figure 10, when the operating mechanism 100 is in the closed state, the rocker arm 45 (rocker arm assembly) swings towards the second end of its stroke and drives the first end of the spring to rotate around the second end of the spring. When the energy storage spring 22 passes the first dead point position, the energy storage spring 22 drives the first crank 30 to rotate in the second direction and drives the rocker arm 45 (rocker arm assembly) to swing to the second end of its stroke. The first crank 30 drives the slider 26 to slide along the slide rail 25 to its limit engagement through the first connecting rod 27, preventing the first crank 30 from rotating in the second direction. At the same time, the slider 26 drives the contact support 110 to rotate in the first direction to the disconnect position through the second connecting rod 29 and the second crank 19, so that the operating mechanism switches to the position as shown in Figure 10. Figure 2 , 5 The tripped state is shown in Figure 11. Specifically, as shown... Figure 1-2As shown in Figures 4-5 and 10-11, when the operating mechanism 100 switches from the closed position to the open position, the slider 26 moves upward along the slide rail 25 in the first direction counterclockwise and the second direction clockwise. When the energy storage spring 22 is at the first dead point position, the energy storage spring 22 reaches its maximum value. The axis of the sixth shaft 67 is located on the axis of the energy storage spring 22. At the same time that the energy storage spring 22 rotates around the second end of the spring through the first dead point position, the axis of the energy storage spring 22 rotates through the axis of the sixth shaft 67. Therefore, the axis of the sixth shaft 67 can also be regarded as the first dead point position. That is, the axis of the energy storage spring 22 rotates through the axis of the sixth shaft 67, which is also the first spring 22 rotating through the first dead point position. Then the energy storage spring 22 releases energy to drive the first crank 30.

[0073] The following will combine Figure 1-2 As shown in Figures 4-5 and 10-11, the operation process of the operating mechanism 100 switching from the open state to the closed state is described: Figure 2 , 5 As shown in Figure 11, when the operating mechanism 100 is in the open state, the rocker arm 45 (rocker arm assembly) swings towards the first end of its stroke and drives the first end of the spring to rotate around the second end of the spring. When the energy storage spring 22 passes the first dead point position, the energy storage spring 22 drives the first crank 30 to rotate in the first direction, causing the crank limiting part 31 to engage with the jump fastener 60 to prevent the first crank 30 from rotating in the first direction. At the same time, the energy storage spring 22 drives the rocker arm 45 (rocker arm assembly) to swing to the first end of its stroke, and the first crank 30 drives the slider 26 to slide along the slide rail 25 through the first connecting rod 27. The slider 26 drives the contact support 110 to rotate in the second direction to the closed position through the second connecting rod 29 and the second crank 19, so that the operating mechanism switches to the open state. Figure 1 , 4 The closed state is shown in Figures 1 and 10; the first direction and the second direction are opposite to each other. Specifically, as shown in Figure 10... Figure 1-2 In the directions shown in 4-5 and 10-11, when the operating mechanism 100 switches from the open state to the closed state, the slider 26 moves downward along the slide rail 25.

[0074] The following combination Figure 1 , 3 As shown in Figures 4, 6, 10, and 12, the operation process of the operating mechanism 100 switching from the closed state to the tripped state is described: Figure 1 , 4As shown in Figure 10, when the operating mechanism 100 is in the closed state, due to a circuit breaker fault such as overload or short circuit, the re-fastener 15 is driven to rotate. The re-fastener 15 rotates to release its limiting engagement with the locking fastener 13. The locking fastener 13 rotates to release its locking engagement with the trip fastener 60. The trip fastener 60 rotates and drives the first crank 30 to rotate synchronously. The first crank 30 drives the slider 26 to slide along the slide rail 25 through the first connecting rod 27 until it engages with the slide rail 25 to prevent the trip fastener 60 from continuing to rotate. At the same time, the slider 26 drives the contact support 110 to rotate in the second direction to the disconnected position through the second connecting rod 29 and the second crank 19. The energy storage spring 22 drives the rocker arm 45 (rocker arm assembly) to swing to the second end of the stroke until the reset structure 42 engages with the trip fastener 60. The operating mechanism 100 switches to the closed state. Figure 3 , 6 The tripped state is shown in Figure 12. Specifically, as shown... Figure 1 , 3 In the directions shown in 4, 6, 10, and 12, when the operating mechanism 100 switches from the closed state to the tripped state, the slider 26 moves upward along the slide rail 25.

[0075] The following will combine Figure 2-3 As shown in Figures 5-6 and 11-12, the operation process of the operating mechanism 100 switching from the tripped state to the open state is described: Figure 3 , 6 As shown in Figure 12, when the operating mechanism 100 is in the disengaged state, the rocker arm 45 (rocker arm assembly) swings to the second end of its stroke. The rocker arm 45 (rocker arm assembly) drives the jump fastener 60 to rotate and engage with the locking fastener 13 through the reset structure 42. At the same time, the locking fastener 13 rotates to engage with the re-fastener 15. The operating mechanism 100 switches to the disengaged state as shown in Figure 12. Figure 2 , 5 The tripped state is shown in Figure 11.

[0076] It should be pointed out that, such as Figure 14 As shown, when the operating mechanism 100 is in the open state, the contact support 110 and / or the moving contact are also limited by the unit housing 120, preventing the contact support 110 from continuing to rotate in the first direction. Simultaneously, the contact support 110 limits the slider 26 via the second connecting rod 29, also preventing the slider 26 from sliding upwards along the slide rail 25; Figure 4As shown, when the operating mechanism 100 is in the closed state, the moving contact and the stationary contact 18 are closed, preventing the moving contact from continuing to rotate in the second direction. At the same time, the contact support 110 will continue to rotate at a certain angle to obtain a certain overtravel to ensure the necessary pressure between the moving contact and the stationary contact 18. When the crank limiting part 31 of the first crank is engaged with the limit fastener 60, the contact support 110 will be limited and cannot continue to rotate. When the operating mechanism 100 is in the tripped state, the contact support 110 and / or the moving contact are limited by the unit housing 120 or the shaft 5 is limited by the bracket 50, so that the contact support 110 can no longer continue to rotate in the first direction. The contact support 110 also limits the slider 26 through the second connecting rod 29, which also prevents the slider 26 from sliding upward along the slide rail 25. Therefore, the slide rail 25 can also be designed to only guide the slider 26. When the operating mechanism 100 is in the open or tripped state, the slide rail 25 will not limit the slider 26.

[0077] like Figure 9 The image shows one layout of the operating mechanism 100 in the fourth embodiment:

[0078] like Figure 9 As shown, the re-fastener 15, locking fastener 13, jumping fastener 16, and first crank 30 are all disposed between the two support side plates of the mechanism bracket 50; one end of the jumping fastener 60 is pivotally disposed on the support side plate, and the other end is locked to the locking fastener 13; the re-fastener 15 and locking fastener 13 are disposed on one side of the V-groove, and the support connecting plate of the mechanism bracket 50 is located on the other side of the V-groove; one end of the rocker arm support leg of the rocker arm 45 is pivotally disposed at the bottom of the V-groove; one end of the first crank 30 is rotatably connected to the middle of the jumping fastener 60, and the other end is rotatably connected to one end of the first connecting rod 27, and the other end of the first connecting rod 27 is connected to the slider 26. The slide rail 25 is mounted on the side plate of the bracket, and the V-groove is mounted on both ends of the side plate of the bracket with opposite opening directions. The two second connecting rods 29 are mounted on both sides of the two side plates of the bracket and are rotatably connected to both ends of the slider 26. The two sets of second connecting rod mechanisms are mounted on both sides of the two side plates of the bracket. One end of the two second cranks 19 is rotatably mounted on the two side plates of the bracket, and the middle part is rotatably connected to the two second connecting rods 29. The other end is rotatably connected to the two second connecting rods 35. One end of the two third cranks 36 is rotatably mounted on the two side plates of the bracket, and the other end is rotatably connected to the two second connecting rods 35.

[0079] To better illustrate the structure and principle of the operating mechanism 100, the following provides a detailed explanation of the cooperation relationships among the components of the operating mechanism 100 in three states (closed, open, and tripped), as follows:

[0080] like Figure 1-3As shown in Figures 4-6 and 10-12, the two ends of the swing stroke of the rocker arm 45 are the first end of the stroke and the second end of the stroke, respectively; the two ends of the energy storage spring 22 are the first end of the spring and the second end of the spring, respectively, which are connected to the rocker arm assembly and the first crank 30; the axis of the energy storage spring 22 is the first axis, and the two sides of the first axis are the first side of the axis and the second side of the axis, respectively; as shown in Figures 4-6 and 10-12, the two ends of the swing stroke of the rocker arm 45 are the first side of the axis and the second side of the axis, respectively; Figure 1 , 4 As shown in Figure 10, when the operating mechanism 100 is in the closed state, the rocker arm 45 is located at the first end of its stroke, and the fastener 15 and the locking fastener 13 are in a limiting engagement, the locking fastener 13 and the jump fastener 60 are in a locking engagement, the crank limiting part 31 and the jump fastener 60 are in a limiting engagement to prevent the first crank 30 from rotating in the first direction, and the axis of the sixth shaft 67 is located on the first side of the axis; as Figure 2 , 5 As shown in Figure 11, when the operating mechanism 100 is in the open state, the rocker arm 45 is located at the second end of its stroke. The fastener 15 and locking fastener 13 are in a limiting engagement, the locking fastener 13 is in a locking engagement with the jump fastener 60, the crank limiting part 31 is released from its limiting engagement with the jump fastener 60, the reset structure 42 is in a limiting engagement with the jump fastener 60, the slider 26 is in a limiting engagement with the slide rail 25 and, through the first connecting rod 27, prevents the first crank 30 from rotating in the second direction. The first and second directions are opposite to each other, and the axis of the sixth shaft 67 is located on the second side of the axis. Further, as... Figure 3 , 6 As shown in Figure 12, when the operating mechanism 100 is in the disengaged state, the rocker arm 45 is located in the middle of its swing stroke, the locking fastener 15 and the locking fastener 13 are released from their limiting engagement, the locking fastener 13 and the trip fastener 60 are released from their locking engagement, the crank limiting part 31 and the trip fastener 60 are limited engagement, the reset structure 42 and the trip fastener 60 are limited engagement, the slider 26 and the slide rail 25 are limited engagement, and the axis of the sixth shaft 67 is located on the first side of the axis; the operating mechanism 100 enters the open state after being re-engaged from the disengaged state.

[0081] It should be noted that the "re-locking" of the operating mechanism 100 means that the locking fastener 13 and the jumping fastener 60 resume the locking engagement and the re-locking fastener 15 and the locking fastener 13 resume the limiting engagement.

[0082] like Figure 4-6 As shown in Figures 13-14, one embodiment of the moving contact mechanism 1c is illustrated: the moving contact mechanism 1c includes a contact support 110, a moving contact, and a contact spring 23. The moving contact is disposed on the contact support 110, and the two can rotate synchronously, with the moving contact rotating relative to the contact support 110. One end of the contact spring 23 is connected to the moving contact, and the other end is connected to the contact support 110. When the moving contact closes with the stationary contact 18, a first force is applied to the moving contact, causing the moving contact to press against the stationary contact 18. Further, as... Figure 4-6As shown in Figures 13-14, one end of the contact spring 23 is connected to the moving contact via a first spring shaft 92, and the other end is rotatably connected to the contact support 110 via a second spring shaft 112. Further, as... Figure 4-6 As shown in Figures 13-14, the moving contact includes a moving conductive rod 90 and a moving contact 94 disposed at one end of the moving conductive rod 90. The moving conductive rod 90 is provided with a conductive rod groove that cooperates with the first spring shaft 92.

[0083] like Figure 13-14 As shown, the stationary contact 18 includes a stationary conductive plate 18-2 and a stationary contact 18-1 disposed on the stationary conductive plate 18-2. The stationary conductive plate 18-2 includes a first stationary conductive plate opposite to the moving conductive rod 90. The current directions in the moving conductive rod 90 and the first stationary conductive plate are opposite.

[0084] The contact spring 23 can also lock the moving contact. Specifically, the two ends of the contact spring 23 are a third end and a fourth end, respectively. The third end is connected to the moving contact, and the fourth end is connected to the contact support 110. The geometric axis of the contact spring 23 is a second axis, which coincides with the line connecting the third and fourth ends of the spring. Figure 14 As shown, when the moving contact 9 is normally closed or normally open, the second axis remains on one side of the rotation axis (tenth axis 111s) of the contact support 110, keeping the moving contact in the normally closed or normally open position. When the moving contact is repelled by the electric repulsive force generated by the short-circuit current, the moving contact rotates relative to the contact support 110, and the moving contact drives the contact spring 23 to rotate around the fourth end of the spring, causing the second axis to swing to the other side of the rotation axis (tenth axis 111s) of the contact support 110, keeping the moving contact in the temporary disconnected position. The moving contact mechanism has a simple structure. The contact spring ensures reliable contact between the moving contact and the stationary contact by allowing the moving contact to overtravel. Furthermore, when the moving contact is repelled by the electric repulsive force generated by the short-circuit current, the contact spring locks the moving contact in the temporary disconnected position, thus preventing the moving contact from rebounding after being repelled when a short-circuit fault occurs, ensuring reliable disconnection between the moving contact and the stationary contact. It should be noted that when the moving contact is in the temporary disconnect position, if the operating mechanism switches from the closing state to the opening state, the moving contact 9 will automatically move from the temporary disconnect position to the normal disconnect position.

[0085] like Figure 13 and 14 As shown, the contact support 110 is rotatably mounted inside the unit housing 120 of the circuit breaker pole 300 via the thirteenth axis 111-1 or rotatably mounted between two insulating partitions.

[0086] It should be noted that in this application, "shaft" is not limited to the traditional columnar structure, but broadly refers to the structure that realizes the rotational connection between multiple structures, such as columnar bosses / protrusions, annular protrusions, rivets, screws, etc., which will not be elaborated here.

[0087] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An operating mechanism for a circuit breaker, comprising a mechanism support (50), a trip fastener (60), a locking fastener (13), and a rocker arm assembly pivotally mounted on the mechanism support (50), an energy storage spring (22), a first crank (30), and a first connecting rod assembly; wherein the locking fastener (13) engages with the trip fastener (60), one end of the first crank (30) is rotatably connected to the trip fastener (60), and the other end is rotatably connected to the first connecting rod assembly via a fifth shaft (16), and one end of the energy storage spring (22) is connected to the fifth shaft (16), and the other end is rotatably connected to the rocker arm assembly; characterized in that: The operating mechanism further includes a second linkage assembly, which includes a second crank (19) pivotally mounted about a tenth axis (111s), a third link (35), and a third crank (36) pivotally mounted about an eleventh axis (119s). The second crank (19) is also rotatably connected to the third link (35) via an eighth axis (5), and the third link (35) is also rotatably connected to the third crank (36) via a ninth axis (6). The first linkage assembly is also rotatably connected to the second crank (19) via a seventh axis (21) and is used to drive the second crank (19) to rotate about the tenth axis (111s). The 10th axis (111s), the axis of the 8th axis (5), the axis of the 9th axis (6), and the 11th axis (119s) are arranged in parallel and spaced apart, and the axis of the 7th axis (21) is arranged in parallel and spaced apart from the 10th axis (111s); the 10th axis (111s) coincides with the rotation axis of the moving contact mechanism (1c) of the circuit breaker, and the 8th axis (5) is driven to be connected to the moving contact mechanism (1c) to drive its rotation; or, the 11th axis (119s) coincides with the rotation axis of the moving contact mechanism (1c), and the 9th axis (6) is driven to be connected to the moving contact mechanism (1c) to drive its rotation.

2. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The second crank (19) is pivotally mounted on the mechanism support (50) or the circuit breaker housing of the circuit breaker about the tenth axis (111s), and the third crank (36) is pivotally mounted on the mechanism support (50) or the circuit breaker housing about the eleventh axis; one end of the second crank (19) is pivotally mounted on the mechanism support (50) about the tenth axis (111s), and the other end is rotatably connected to one end of the third connecting rod (35) through the eighth axis (5), the seventh axis (21) is located between the two ends of the second crank (19), the other end of the third connecting rod (35) is rotatably connected to one end of the third crank (36) through the ninth axis (6), and the other end of the third crank (36) is pivotally mounted on the mechanism support (50) about the eleventh axis (119s).

3. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The tenth axis (111s), the eighth axis (5), the ninth axis (6), and the eleventh axis (119s) are located at the four vertices of a parallelogram.

4. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The first linkage assembly includes a first linkage (27), a slider (26), and a second linkage (29). The operating mechanism also includes a slide rail (25). The first crank (30) is rotatably connected to one end of the first linkage (27) via a fifth shaft (16). The other end of the first linkage (27) is rotatably connected to the slider (26). The slider (26) is also rotatably connected to one end of the second linkage (29). The other end of the second linkage (29) is rotatably connected to the second crank (19) via a seventh shaft (21). The slider (26) is slidably disposed in the slide rail (25).

5. The operating mechanism of the circuit breaker according to claim 4, characterized in that: The slide rail (25) is mounted on the mechanism support (50) or on the circuit breaker housing.

6. The operating mechanism of the circuit breaker according to claim 4, characterized in that: When the operating mechanism is in the open or tripped state, the slider (26) and the slide rail (25) are in a limiting cooperation to prevent the slider (26) from sliding.

7. The operating mechanism of the circuit breaker according to claim 6, characterized in that: The slider (26) includes a sliding shaft and a track block. Each end of the sliding shaft is provided with a track block, and each track block is slidably limited by a slide rail (25).

8. The operating mechanism of the circuit breaker according to claim 4, characterized in that: The two ends of the swing stroke of the rocker arm assembly are the first end of the stroke and the second end of the stroke, respectively. The two ends of the energy storage spring (22) connected to the rocker arm assembly and the fifth shaft (16) are the first end of the spring and the second end of the spring, respectively. When the operating mechanism is in the closed state, the rocker arm assembly swings to the second end of the stroke and drives the first end of the spring to rotate around the second end of the spring. When the energy storage spring (22) rotates past the first dead point, the energy storage spring (22) drives the first crank (30) to rotate in the second direction and drives the rocker arm assembly to swing to the second end of the stroke. The first crank (30) drives the slider (26) to slide along the slide rail (25) to its limit engagement through the first connecting rod (27), preventing the first crank (30) from rotating in the second direction. The operating mechanism switches to the open state. When the operating mechanism is in the open state, the rocker arm assembly swings to the first end of the stroke and drives the first end of the spring to rotate around the second end of the spring. When the energy storage spring (22) passes the first dead point position, the energy storage spring (22) drives the first crank (30) to rotate in the first direction, so that the crank limiting part (31) of the first crank (30) is in a limiting engagement with the jump fastener (60) to prevent the first crank (30) from rotating in the first direction. At the same time, the energy storage spring (22) drives the rocker arm assembly to swing to the first end of the stroke, and the operating mechanism switches to the closed state. The first direction and the second direction are opposite to each other.

9. The operating mechanism of the circuit breaker according to claim 8, characterized in that: The operating mechanism also includes a re-fastener (15) pivotally mounted on the mechanism support (50), and the re-fastener (15) is limited in place with the locking fastener (13); When the operating mechanism is in the closed state, the fastener (15) rotates to release the locking fastener (13) from its limit engagement, the locking fastener (13) rotates to release the locking fastener (60) from its lock engagement, the jumping fastener (60) rotates and drives the first crank (30) to rotate synchronously, the first crank (30) drives the slider (26) to slide along the slide rail (25) through the first connecting rod (27) to the limit engagement with the slide rail (25) to prevent the jumping fastener (60) from continuing to rotate, the energy storage spring (22) drives the rocker arm assembly to swing to the second end of the stroke until the reset structure (42) of the rocker arm assembly is in the limit engagement with the jumping fastener (60), and the operating mechanism switches to the disengaged state; When the operating mechanism is in the tripped state, the rocker arm assembly swings to the second end of the stroke. At the same time, the rocker arm assembly drives the trip fastener (60) to rotate to engage with the locking fastener (13) through the reset structure (42). Simultaneously, the locking fastener (13) rotates to engage with the re-fastener (15) at the limit position, and the operating mechanism switches to the tripped state.

10. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The mechanism support (50) includes a seventh axis clearance groove (50-21), the shape of which matches the movement trajectory of the seventh axis (21).

11. A circuit breaker, characterized in that, It includes the operating mechanism as described in any one of claims 1-10.

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