Operating mechanism and circuit breaker

Abstract

The operating mechanism comprises a pair of supports arranged at an interval, a rocker arm, a push rod and a lock catch which are rotatably assembled between the pair of supports, a handle is arranged at one end of the rocker arm, the operating handle drives the rocker arm to perform opening and closing swing, the push rod is used for driving a moving contact assembly to perform opening and closing rotation, and the operating mechanism further comprises a pull rod. The pull rod is arranged between the pair of supports in a sliding mode and matched with the lock catch in a sliding mode, the pull rod is in linkage with one end of the push rod and then is in driving connection with the end, away from the handle, of the rocker arm, the rocker arm drives the pull rod and the push rod to move to the closing position at the same time during closing, and the pull rod is matched with the lock catch in a limiting mode during opening. And the rocker arm drives the lock catch to unlock and rotate, so that the lock catch and the pull rod are firstly released from limiting fit, and then the pull rod and the push rod respectively move to an opening position. According to the utility model, opening and closing are operated by the rocker arm, and particularly, the rocker arm directly drives the lock catch to unlock, so that the device has the advantages of simple structure and convenience in operation.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to an operating mechanism and a circuit breaker. Background Art

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and closing, carrying, and interrupting current under abnormal circuit conditions within a specified timeframe. The operating mechanism used to open and close circuits in circuit breakers incorporates numerous connecting rods, resulting in complex structures, high failure rates, short service lives, and difficulty in repair and replacement. Furthermore, the rocker arm used to manually actuate the operating mechanism lacks corresponding limit stops in the open and closed positions. This means that the handle, which swings with the rocker arm, cannot accurately reflect the open and closed states, necessitating the installation of a separate indicator device. Summary of the Invention

[0003] The purpose of the present utility model is to overcome at least one defect of the prior art and provide an operating mechanism and a circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an operating mechanism, comprising a pair of brackets arranged at intervals, a rocker arm, a push rod and a lock buckle being rotatably assembled between the pair of brackets, one end of the rocker arm being provided with a handle, the operating handle driving the rocker arm to swing to open and close the switch, the push rod being used to drive the moving contact assembly to rotate to open and close the switch, and further comprising a pull rod, the pull rod being slidably arranged between the pair of brackets and slidably matched with the lock buckle, the pull rod being linked to one end of the push rod and then drivingly connected to the end of the rocker arm away from the handle,

[0006] When closing the switch, the rocker arm drives the pull rod and the push rod to move to the closing position at the same time, and the pull rod cooperates with the lock to limit the position. When opening the switch, the rocker arm drives the lock to unlock and rotate, so that the lock first releases the limit cooperation with the pull rod, and the pull rod and push rod then move to the opening position respectively.

[0007] Preferably, the rocker arm is provided with a driving slot and a tripping driving part, the driving part is provided inside the driving slot, the push rod is linked to one end of the pull rod through a linkage shaft, the linkage shaft is slidably matched with the bracket and is located in the driving slot,

[0008] When the switch is closed, the driving part pushes the linkage shaft to move. When the switch is opened, the opening driving part drives the lock to rotate, and the linkage shaft moves in the driving groove until it abuts against the driving part.

[0009] Preferably, it also includes a rocker spring, which is connected between the pull rod and the rocker arm. When closing the switch, the pull rod locks the rocker arm to the closing position through the rocker spring. When opening the switch, the linkage shaft abuts against the drive part to limit the rocker arm to the opening position.

[0010] Preferably, a sliding limiting structure is provided between the pull rod and the bracket, and / or a sliding limiting structure is provided between the pull rod and the lock, and the sliding limiting structure limits the pull rod from moving in a straight line.

[0011] Preferably, the lock buckle is provided with a locking groove and a brake-opening matching portion, and the middle portion of the pull rod is provided with a locking portion.

[0012] When the switch is closed and the pull rod moves to the closed position, the locking portion and the locking groove are limitedly engaged;

[0013] When opening the gate, the opening drive part of the rocker arm triggers the opening matching part to drive the lock to unlock and rotate. The locking part first releases the limit matching with the locking groove, and then the locking part slides and matches with the locking groove until the pull rod moves to the opening position.

[0014] Preferably, a locking elastic member is further included, wherein a first connecting portion is provided at one end of the lock buckle close to the push rod, and a second connecting portion is provided at one end of the pull rod close to the push rod. Both ends of the locking elastic member are respectively connected to the first connecting portion and the second connecting portion, and the locking portion is limited in the locking groove by the elastic force of the locking elastic member.

[0015] Preferably, the locking groove includes a strip area and a recessed area, and the recessed area is connected to the end of the strip area away from the push rod, so that a step surface is formed on one side wall of the locking groove. The strip area and the locking part are slidably matched to limit the moving stroke of the pull rod. When the pull rod moves to the closing position, the locking part is limited by the recessed area.

[0016] Preferably, it further comprises a traction rod for rotational assembly, the traction rod is adjacent to the lock buckle, and the lock buckle is further provided with an unlocking portion. When the gate is opened, the unlocking portion is triggered by the traction rod to drive the lock buckle to rotate for unlocking.

[0017] Preferably, the rocker arm includes two rotating walls arranged at intervals, one end of the two rotating walls is connected to form a mounting wall, the mounting wall is provided with a handle, a mounting hole is provided in the middle of each rotating wall, a rocker arm mounting shaft is provided in the mounting hole, the rocker arm mounting shaft is supported between a pair of brackets, and a protrusion serving as a gate opening drive portion is provided on the middle edge of the rotating wall.

[0018] The rotating wall is provided with an open groove serving as a driving groove, and the mounting hole is located between the mounting wall and the driving groove. The opening of the driving groove and the gate driving portion are located on the same side edge of the rotating wall. The end of the driving groove away from the opening serves as the driving portion, and the side wall of the driving groove is provided with a spring connecting portion.

[0019] Preferably, the bracket is provided with a lock mounting shaft, the lock is rotatably assembled on the lock mounting shaft, and the pull rod is provided with a limiting sliding groove for the lock mounting shaft to pass through.

[0020] Preferably, a linkage shaft is provided at one end of the pull rod, the middle part of the push rod is rotatably connected between a pair of brackets, a linkage groove is provided at each end of the push rod, the linkage shaft is linked to one linkage groove, and the other linkage groove is used to drive the connection with the rotating shaft of the moving contact assembly.

[0021] Preferably, the pull rod includes two spaced-apart connecting walls, one end of the two connecting walls is connected to form a connecting end, the connecting end is provided with at least one mounting portion, and each connecting wall is provided with a linkage hole at one end away from the mounting portion, and a linkage shaft for connecting to the push rod is installed in the linkage hole, and a strip-shaped limiting groove and a through-hole are provided in the middle of each connecting wall, and the through-hole is located between the limiting groove and the linkage hole, and a shaft rod serving as a locking portion is installed in the through-hole, and the edge of one end of the connecting wall away from the mounting portion protrudes outward to form a connecting protrusion and is provided with a limiting slot, and a shaft rod serving as a second connecting portion is provided in the limiting slot.

[0022] Preferably, the lock includes two spaced-apart matching walls, and one side edge of the two matching walls are connected to form a U-shaped lock body, and the lock body has a space for slidingly matching with the pull rod, and the other side edge of the matching wall serves as a gate-dividing matching part. One end plate surface of the matching wall is provided with a connecting hole, and the connecting hole is for the lock mounting shaft assembled on the bracket to pass through. The other end edge of the matching wall extends outward to form an extension part, and the extension part is provided with an axial hole, and an axial rod as a first connecting part is assembled in the axial hole, and the end of the first connecting part serves as an unlocking part. A locking groove is provided in the middle of the matching wall, and the locking groove includes a strip area and a recessed area. The recessed area is located at one end close to the connecting hole, and the recessed area forms a step surface on the side of the locking groove close to the extension part, and the strip area slides with the pull rod, and the recessed area is used to lock the pull rod.

[0023] The utility model also provides a circuit breaker, comprising a housing, wherein at least one contact system is arranged in the housing, wherein the contact system comprises a movable contact assembly and a static contact that cooperate with each other, and further comprises the operating mechanism as described above.

[0024] Furthermore, the moving contact assembly includes a rotating shaft and a moving contact. The rotating shaft is rotatably assembled in the housing, and the moving contact is connected to the rotating shaft. A trip spring is also connected between the rotating shaft and the housing. After the lock and the pull rod are released from the limit engagement, the trip spring drives the rotating shaft to rotate to trip.

[0025] Furthermore, it also includes an electromagnetic mechanism, which is connected to the end of the pull rod away from the push rod, and the electromagnetic mechanism drives the pull rod to move in a straight line between the opening position and the closing position.

[0026] Furthermore, at least one accessory module is provided in the housing, and the accessory module triggers the rotation of the traction rod to drive the contact system to open.

[0027] The operating mechanism and circuit breaker of the present invention have one end of the pull rod and the push rod linked together and driven by the rocker arm, so that the pull rod cooperates with the lock and is locked to the closing position, thereby achieving closing. The lock is directly driven by the rocker arm to unlock, so that the pull rod moves to the opening position to achieve overall opening. It has the advantages of simple structure and convenient operation.

[0028] In addition, the rocker arm spring limits the rocker arm in the closed position, and the linkage shaft and the drive part abut against each other to limit the rocker arm in the open position, so that the handle can indicate the open and closed status of the operating mechanism, and there is no need to set up an additional indicating device, thereby simplifying the overall structure of the operating mechanism.

[0029] In addition, by arranging a locking elastic member between the lock catch and the pull rod, the locking elastic member cooperates to lock the pull rod and the lock catch in the closed position, further improving the closing stability.

[0030] In addition, by configuring an electromagnetic mechanism to drive the pull rod, the electromagnetic mechanism provides closing force for the pull rod, which helps to improve the closing speed of the operating mechanism.

[0031] In addition, by configuring accessory modules in conjunction with the tow bar, the circuit breaker is provided with a variety of functional units, which can conveniently meet different functional requirements and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a top view of the circuit breaker of the utility model;

[0033] Figure 2 The cross section of the circuit breaker of the utility model is Figure 1 ;

[0034] Figure 3 The cross section of the circuit breaker of the utility model is Figure 2 ;

[0035] Figure 4 This is a schematic diagram of the coordination between the operating mechanism and the contact system in the present utility model;

[0036] Figure 5 This is a schematic diagram of the coordination of the operating mechanism, contact system, and accessory modules in the present utility model;

[0037] Figure 6 This is a schematic diagram of the coordination of the operating mechanism, electromagnetic mechanism and contact system in the utility model;

[0038] Figure 7 This is a schematic diagram of the coordination of the pull rod, push rod and lock catch in the utility model (closed position);

[0039] Figure 8 This is a schematic diagram of the coordination of the pull rod, lock buckle and traction rod in the utility model;

[0040] Figure 9 This is a structural diagram of the rocker arm in the utility model;

[0041] Figure 10 This is a schematic structural diagram of the pull rod in the utility model;

[0042] Figure 11 It is a structural diagram of the lock buckle in the utility model;

[0043] Figure 12 This is a schematic structural diagram of the push rod in the utility model;

[0044] Figure 13 It is a structural diagram of the traction rod in the utility model;

[0045] Figure 14 It is a structural diagram of the rotating shaft of the utility model;

[0046] Reference numerals:

[0047] 1-housing, 20-bracket, 201-lock mounting shaft, 202-push rod mounting shaft, 203-rocker arm mounting shaft, 21-lock, 210-lock body, 211-locking groove, 2111-strip area, 2112-recessed area, 212-unlocking part, 213-first connecting part, 214-opening matching part, 215-connecting hole, 216-extension part, 217-axis hole, 22-push rod, 221-first linkage groove, 222-second linkage groove, 23-traction rod, 231-first trigger part, 232-tripping trigger part, 233-third trigger part, 234-fourth trigger part, 235-fifth trigger part, 24-pull rod, 240-limiting slide groove, 241-locking part, 242-linking hole, 243-second connecting part, 244- Mounting part, 245-connecting protrusion, 246-limiting slot, 247-through hole, 25-linkage shaft, 261-locking elastic member, 262-rocker spring, 27-handle, 28-rocker, 281-driving slot, 2811-driving part, 282-opening driving part, 283-mounting wall, 284-spring connecting part, 285-mounting hole, 29-electromagnetic mechanism, 291-moving iron core, 292-static iron core, 293-coil assembly, 31-moving contact assembly, 311-rotating shaft, 3111-opening pulling part, 312-moving contact, 32-static contact, 33-opening spring, 4-arc extinguishing system, 5-electromagnetic instantaneous release, 6-magnetic flux release, 7-manual trip button, 8-control module, 91-current transformer, 92-zero sequence transformer. DETAILED DESCRIPTION

[0048] The following embodiments are provided in conjunction with the accompanying drawings to further illustrate the specific implementation of the operating mechanism and circuit breaker of the present invention. The operating mechanism and circuit breaker of the present invention are not limited to the description of the following embodiments.

[0049] like Figure 1-3 As shown, the circuit breaker includes a housing 1, in which an operating mechanism and at least one circuit breaker pole are arranged. Each circuit breaker pole includes a pair of terminals, and a contact system is connected between the pair of terminals. The contact system includes a movable contact assembly 31 and a static contact 32 that cooperate with each other. The operating mechanism drives the movable contact assembly 31 to contact or separate with the static contact 32, thereby connecting or disconnecting the main line of each circuit breaker pole. An arc extinguishing system 4 is also provided on one side of the contact system, and the arc extinguishing system 4 cooperates with the contact system to extinguish the arc generated by the disconnection.

[0050] Specifically, the operating mechanism includes a pair of spaced-apart brackets 20 and a rotatably assembled traction rod 23, and a rocker arm 28 and a push rod 22 are rotatably assembled between the pair of brackets 20, wherein the rocker arm 28 is linked to the push rod 22, and the push rod 22 is used to drive the moving contact assembly 31 in the circuit breaker to swing open and close, and the rocker arm 28 is usually also connected to a handle 27, and manual opening and closing are achieved by manually operating the handle 27; a buckle structure is rotatably assembled between the pair of brackets 20, and the buckle structure is linked to the push rod 22, and the buckle structure usually includes a trip buckle and a lock buckle 21, and the traction rod 23 is adjacent to the lock buckle 21. In the closed state, the lock buckle 21 is in a locked state, so that the operating mechanism as a whole remains in a balanced state. When the traction rod 23 is triggered to rotate, the lock buckle 21 is driven by the traction rod 23 to unlock and rotate. At this time, the buckle structure releases the buckle state, and the push rod 22 drives the moving contact assembly 31 to rotate to open.

[0051] Furthermore, at least one accessory module can be configured in the housing 1. The accessory module cooperates with the traction rod 23 to trigger the operating mechanism to trip. The accessory module has one or more functional units, providing additional functional units for the circuit breaker to meet the different usage requirements of the circuit breaker and has a wide range of applications. The accessory module can be a manually operated functional unit, for example, a manual trip button 7, which drives the traction rod 23 to rotate by pressing. The accessory module can also be a remotely controlled functional unit, for example, a magnetic flux release 6, an electromagnetic instantaneous release 5, etc. At this time, the accessory module is connected to the control module 8, and the controller of the control module 8 outputs a control signal to drive its action, thereby driving the traction rod 23 to rotate. The control module 8 can be configured in the housing 1 or can be another control device.

[0052] like Figure 2-8 As shown, the improvement of the present application is that a buckle structure is no longer provided, and a lock buckle 21 is only rotatably assembled between a pair of brackets 20. The operating mechanism also includes a pull rod 24, which is slidably provided between a pair of brackets 20 and slidingly cooperates with the lock buckle 21. The pull rod 24 is linked with one end of the push rod 22 and then driven and connected with the end of the rocker arm 28 away from the handle 27. When closing the switch, the rocker arm 28 drives the pull rod 24 and the push rod 22 to move to the closing position at the same time, and the pull rod 24 is limitedly cooperated with the lock buckle 21. When opening the switch, the rocker arm 28 drives the lock buckle 21 to unlock and rotate, so that the lock buckle 21 is first released from the limit cooperation with the pull rod 24, and the pull rod 24 and the push rod 22 are then moved to the opening position respectively.

[0053] In this way, one end of the pull rod 24 after being linked with the push rod 22 is driven by the rocker arm 28, so that the pull rod 24 cooperates with the lock buckle 21 and is locked to the closing position, thereby achieving closing. The lock buckle 21 is directly driven by the rocker arm 28 to unlock, so that the pull rod 24 moves to the opening position to achieve overall opening. It has the advantages of simple structure and convenient operation.

[0054] Specifically, such as Figure 2-5 As shown in Figures 9-12, the rocker arm 28 is provided with a driving groove 281 and a tripping driving portion 282. A driving portion 2811 is provided inside the driving groove 281. The push rod 22 is linked to one end of the pull rod 24 through a linkage shaft 25. The linkage shaft 25 is located in the driving groove 281. When closing the switch, the driving portion 2811 pushes the linkage shaft 25 to move. When opening the switch, the tripping driving portion 282 drives the lock 21 to rotate. The linkage shaft 25 moves in the driving groove 281 until it abuts against the driving portion 2811. The driving groove 281 and the driving portion 2811 cooperate to drive the linkage shaft 25. The structure is simple and the matching stability is guaranteed.

[0055] Further, such as Figure 2-7 As shown, it also includes a rocker spring 262, which is connected between the pull rod 24 and the rocker arm 28. When closing, the closing movement of the pull rod 24 pulls the rocker spring 262. When the pull rod 24 moves to the closing position, the rocker spring 262 locks the rocker arm 28 to the closing position. When opening, the linkage shaft 25 abuts against the drive part 2811 to limit the rocker arm 28 to the opening position. In this way, the handle 27 has the function of indicating the opening and closing status of the operating mechanism, and there is no need to set up an additional indicating device, thereby simplifying the overall structure of the operating mechanism.

[0056] Furthermore, a sliding limit structure is provided between the pull rod 24 and the bracket 20, and / or a sliding limit structure is provided between the pull rod 24 and the lock buckle 21, and the sliding limit structure limits the movement trajectory of the pull rod 24, and the pull rod 24 and the lock buckle 21 slide with each other. Preferably, the lock buckle 21 has at least a partial matching space, and the pull rod 24 slides in the matching space of the lock buckle 21. For example, the lock buckle 21 has a U-shaped groove, and the U-shaped groove serves as the matching space. At least the locking portion 241 of the pull rod 24 is located in the U-shaped groove. At this time The overall thickness of the lock catch 21 and the pull rod 24 during the relative sliding fit is less than the total thickness of the lock catch 21 and the pull rod 24. When the locking portion 241 and the lock catch 21 are slidingly fitted, the lock catch 241 is driven to move in a straight line, so that the sliding process of the locking portion 241 and the lock catch 21 during opening or closing can be considered as a telescopic movement relative to the lock catch 21. In this way, while ensuring that the movement trajectory of the pull rod 24 is a straight line, the matching stability of the lock catch 21 and the pull rod 24 is improved, and excessive space is avoided. Of course, the lock catch 21 can also be provided with no matching space, and the pull rod 24 and the lock catch 21 are stacked together, and the locking portion 241 extends from the outside of the lock catch 21 and matches with the locking groove 211 of the lock catch 21. With such a structure, its overall thickness is at least the sum of the thicknesses of the lock catch 21 and the pull rod 24.

[0057] Combine Figure 1-14 A specific embodiment of an operating mechanism is provided.

[0058] like Figure 2-8 As shown, the operating mechanism includes a pair of brackets 20, a pull rod 24 and a traction rod 23. A lock buckle 21 and a push rod 22 are rotatably assembled between the pair of brackets 20. The pull rod 24 is slidably assembled between the pair of brackets 20. The lock buckle 21 and the pull rod 24 are slidably matched, and when the switch is in the closed position, the lock buckle 21 and the pull rod 24 are locked and limited. When the switch is opened, the lock buckle 21 is first driven to unlock and rotate, so that the lock buckle 21 and the pull rod 24 are released from the locking limit, and the pull rod 24 can slide and cooperate with the lock buckle 21 until the pull rod 24 moves to the open position; one end of the pull rod 24 is linked to one end of the push rod 22 through a linkage shaft 25, and the linkage shaft 25 is preferably connected to the bracket 20 The other end of the push rod 22 is used for sliding fit and linkage connection with the moving contact assembly 31 in the circuit breaker. When the driving pull rod 24 moves between the closing position and the opening position, the push rod 22 can be driven to swing to the opening position or the closing position accordingly. The traction rod 23 can be supported between a pair of brackets 20, or it can be arranged in the circuit breaker outside a pair of brackets 20. The traction rod 23 is rotatably assembled in a position adjacent to the lock 21. The traction rod 23 triggers the lock 21 to unlock and rotate. After the pull rod 24 is unlocked from the lock 21, it moves to the opening position. Correspondingly, the push rod 22 also moves to the opening position, so that the operating mechanism drives the moving contact assembly 31 to open.

[0059] In this embodiment, if Figure 2 、 3 As shown in FIG6 , an electromagnetic mechanism 29 is also provided. The pull rod 24 is linked and connected between the electromagnetic mechanism 29 and the push rod 22. The electromagnetic mechanism 29 drives the pull rod 24 to move to the closing position, and the electromagnetic force drives the operating mechanism to close the circuit breaker, thereby improving the closing speed.

[0060] Specifically, the electromagnetic mechanism 29 can adopt an existing structure, such as Figure 2 、 3As shown in FIG6 , the electromagnetic mechanism 29 includes a coil assembly 293, a moving iron core 291 and a static iron core 292, wherein the coil assembly 293 includes a coil frame and a coil wound around the outside of the coil frame, the static iron core 292 is fixedly arranged at one end of the coil frame, and the moving iron core 291 is slidably arranged at the other end of the coil assembly 293 and spaced apart from the static iron core 292. In this embodiment, the static iron core 292 is an E-shaped structure with three connecting arms. The connecting arm in the middle position passes through the middle of the coil frame, and the other two connecting arms are respectively along the coil assembly 2 93 is extended outward, and the length of the three connecting arms of the static iron core 292 is equal to the axial length of the coil frame, so that the static iron core 292 and the end of the coil assembly 293 facing the moving iron core 291 remain flush, so that the moving iron core 291 and the static iron core 292 have a larger attraction surface. When the coil is energized, a magnetic field is generated between the moving iron core 291 and the static iron core 292, and the magnetic field drives the moving iron core 291 to move in a straight line in the direction close to the static iron core 292. The pull rod 24 is fixedly connected to the moving iron core 291, and is also driven to move in a straight line.

[0061] Among them, such as Figure 2-8 , 10 and 11, the lock buckle 21 is provided with a locking groove 211 and an unlocking portion 212, the middle part of the pull rod 24 is provided with a locking portion 241, and the traction rod 23 is provided with a tripping triggering portion 232. When the switch is in the closed position, the locking portion 241 is limited in cooperation with the locking groove 211. When the switch is opened, the tripping triggering portion 232 of the traction rod 23 triggers the unlocking portion 212 to unlock the lock buckle 21 and rotate it, so that the locking portion 241 is first released from the locking groove 211. Subsequently, the locking portion 241 slides along the locking groove 211 until the pull rod 24 moves Move to the opening position. In this embodiment, the locking groove 211 is arranged in the middle of the lock buckle 21. The locking groove 211 includes a strip area 2111 and a recessed area 2112. The recessed area 2112 is linked to the end of the strip area 2111 away from the push rod 22, so that a step surface is formed on one side wall of the locking groove 211. When the pull rod 24 slides with the lock buckle 21, the strip area 2111 slides with the locking part 241, and the locking part 241 is limited by the recessed area 2112. In this embodiment, the locking part 241 is an axis rod arranged on the pull rod 24.

[0062] Further, such as Figure 2 、 3As shown in Figures 7 and 8, a locking elastic member 261 is connected between the lock buckle 21 and the pull rod 24. When the pull rod 24 moves to the closed position, the elastic force of the locking elastic member 261 cooperates to limit the locking portion 241 to the locking groove 211. In this embodiment, the locking elastic member 261 is a tension spring. The end of the lock buckle 21 close to the push rod 22 is provided with a first connecting portion 213, and the end of the pull rod 24 close to the push rod 22 is provided with a second connecting portion 243. The two ends of the locking elastic member 261 are respectively connected to the first connecting portion 213 and the second connecting portion 243. When in the closed position, the elastic force of the locking elastic member 261 cooperates to limit the locking portion 241 is limited in the locking groove 211. When the locking portion 241 is at the critical position between the strip area 2111 and the recessed area 2112, the deformation of the locking elastic member 261 is the largest. Correspondingly, the distance between the first connecting portion 213 and the second connecting portion 243 is the largest, and the pulling force of the locking elastic member 261 is the largest. When the locking portion 241 falls into the recessed area 2112, the deformation of the locking elastic member 261 is slightly smaller than the deformation at the critical position, which ensures that the locking elastic member 261 can limit the locking portion 241 in the recessed area 2112, and will not interfere with the lock buckle 21 being locked by the locking elastic member 261 when it is unlocked and rotated.

[0063] In this embodiment, a sliding limiting structure is provided between the pull rod 24 and the lock 21 and the bracket 20 respectively, and the sliding limiting structure limits the moving trajectory of the pull rod 24. Usually, the sliding limiting structure is a strip groove and an axis rod slidingly set in the strip groove.

[0064] Specifically in this embodiment, Figure 7 、 8As shown, a lock buckle mounting shaft 201 and a push rod mounting shaft 202 are provided between a pair of brackets 20, wherein the lock buckle 21 is rotatably provided on the lock buckle mounting shaft 201. In this embodiment, the lock buckle 21 rotates around the lock buckle mounting shaft 201 to unlock, and the push rod 22 is rotatably assembled on the push rod mounting shaft 202. The push rod 22 rotates around the push rod mounting shaft 202 to open and close the switch. A limiting slide groove 240 is provided in the middle of the pull rod 24, and the lock buckle mounting shaft 201 passes through the limiting slide groove 240, and the limiting slide The groove 240 reserves a certain sliding space for the lock mounting shaft 201, and the lock 21 has a matching space. The pull rod 24 is slidably assembled in the matching space of the lock 21. When the pull rod 24 slides linearly relative to the lock 21, the lock mounting shaft 201 and the limiting slide groove 240, the locking portion 241 and the strip area 2111 jointly limit the movement trajectory of the pull rod 24. In this embodiment, the relative linear motion of the pull rod 24 and the lock 21 can be understood as the matching of the pull rod 24 and the lock 21. The telescopic movement is as follows: in the opening position, the locking portion 241 and the lock mounting shaft 202 are respectively located in the strip area 2111 and the end of the limiting slide 240 close to the push rod 22. At this time, most of the area of ​​the pull rod 24 (the area between the end of the pull rod 24 close to the push rod 22 and the end of the limiting slide 240 away from the push rod 22) is located in the matching space, which is equivalent to the pull rod 24 being retracted into the lock 21. During the closing process, the locking portion 241 and the lock mounting shaft 202 are respectively moved to the strip area 2111 and the end of the limiting slide 240 close to the push rod 22. The shaped area 2111 and the limiting slide groove 240 move away from one end of the push rod, and part of the area in the pull rod 24 (the area between the end of the pull rod 24 close to the push rod 22 and the limiting slide groove 240 close to the push rod 22) is located in the matching space, which is equivalent to the pull rod 24 pulling out the lock buckle 21. In addition, the pull rod 24 is located in the matching space, so that the overall thickness of the pull rod 24 and the lock buckle 21 during the relative sliding process is less than the sum of the thicknesses of the two components, making the overall structure smaller and avoiding occupying too much internal space.

[0065] Furthermore, a linkage shaft 25 is provided at one end of the pull rod 24 away from the electromagnetic mechanism 29, and a linkage groove is provided at each end of the push rod 22. The linkage shaft 25 is linked to a linkage groove of the push rod 22, and the other linkage groove of the push rod 22 is linked to the moving contact assembly 31. The linkage shaft 25 slides between a pair of brackets 20. Preferably, a strip-shaped slide groove is provided on the bracket 20 so that the linkage shaft 25 slides linearly along the strip-shaped slide groove. Therefore, in this embodiment, the linkage shaft 25 and the strip-shaped slide groove of the bracket 20, the locking portion 241 and the strip area 2111 of the locking groove 211, and the limiting slide groove 240 of the lock mounting shaft 201 and the pull rod 24 can be considered as a sliding limiting structure for limiting the movement of the pull rod 24.

[0066] Preferably, at least one micro switch is also included. The micro switch can be fixed on the bracket 20, or can also be fixed in the casing of the circuit breaker. The micro switch corresponds to at least the outer side of one end of the strip slide of the bracket 20. When the pull rod 24 moves to the open position and / or the closed position, the micro switch is triggered to feedback the position of the pull rod 24, and then feedback the open or closed state of the circuit breaker with high accuracy.

[0067] In addition, if Figure 2-10 As shown, in this embodiment, a rocker arm 28 can also be configured, and the rocker arm 28 is linked to the push rod 22 to realize manual operation.

[0068] In this embodiment, if Figure 2-8 As shown, a rocker arm 28 is rotatably assembled between a pair of brackets 20, and a handle 27 is provided at one end of the rocker arm 28. The operating handle 27 can drive the rocker arm 28 to swing to open and close the switch. The pull rod 24 is linked with one end of the push rod 22 and is driven and connected to the end of the rocker arm 28 away from the handle 27, that is, the linkage shaft 25 is driven and connected to the end of the rocker arm 28 away from the handle 27. Manual opening and closing is achieved by operating the rocker arm 28, that is, when closing the switch, the rocker arm 28 drives the pull rod 24 and the push rod 22 to move to the closing position at the same time, and the pull rod 24 is limited by the lock buckle 21. When opening the switch, the rocker arm 28 drives the lock buckle 21 to unlock and rotate, so that the lock buckle 21 is first released from the limit fit with the pull rod 24, and then the pull rod 24 and the push rod 22 are respectively moved to the opening position.

[0069] Specifically, such as Figure 9 、 10 As shown, the rocker arm 28 is provided with a driving groove 281 and a tripping driving part 282. A driving part 2811 is provided inside the driving groove 281. The push rod 22 is linked to one end of the pull rod 24 through a linkage shaft 25. The linkage shaft 25 that slides with the bracket 20 is located in the driving groove 281. When closing the switch, the driving part 2811 pushes the linkage shaft 25 to move in the driving groove 281. When opening the switch, the tripping driving part 282 drives the lock buckle 21 to rotate. In this embodiment, the tripping driving part 282 presses the tripping matching part 214 of the lock buckle 21 to unlock and rotate the lock buckle 21.

[0070] Preferably, Figure 2-4 As shown in Figure 6, it also includes a rocker spring 262, which is connected between the pull rod 24 and the rocker arm 28. When closing, the pull rod 24 locks the rocker arm 28 to the closing position through the rocker spring 262. When opening, the linkage shaft 25 abuts against the drive part 2811 to limit the rocker arm 28 to the opening position. At this time, the handle 27 connected to the rocker arm 28 is also stably limited to the closing position and the opening position. The state of the operating mechanism can be judged according to the position of the handle 27, so the indicating device can be omitted.

[0071] In addition, in this embodiment, Figure 2 、 3 As shown in Figures 7, 8 and 13, in addition to being configured with a trip unlocking portion 212, the traction rod 23 may also be configured with other triggering portions for cooperating with other accessory modules in the circuit breaker to drive the operating mechanism to trip. The triggering portion of the traction rod 23 may adopt existing technology.

[0072] Combine Figure 2-8 The lock buckle 21 structure used in this embodiment is provided in Figure 11. The lock buckle 21 includes two spaced-apart matching walls. One side edge of the two matching walls is connected to form a U-shaped lock buckle body 210. The space between the two matching walls of the lock buckle body 210 forms a matching space for providing a sliding matching space for the pull rod 24, making it convenient to receive the pull rod 24 in the lock buckle 21. The other side edge of the matching wall serves as a gate-opening matching portion 214. Figure 14 In the embodiment, the opening gate matching portion 214 is located at the upper edge of the lock catch 21. A connecting hole 215 is provided on one end plate surface of the matching wall. The connecting hole 215 is for the lock catch mounting shaft 201 assembled on the bracket 20 to pass through. The other end edge of the matching wall extends outward to form an extension portion 216. Figure 14 In the figure, the extension portion 216 extends downwardly from the lock buckle 21, and the extension portion 216 is provided with an axial hole 217, in which an axial rod serving as the first connecting portion 213 is assembled, and one end of the locking elastic member 261 is located between the two matching walls and connected to the first connecting portion 213, with the end of the first connecting portion 213 serving as the unlocking portion 212, and a locking groove 211 is provided in the middle of the matching wall, and the locking groove 211 includes a strip area 2111 and a recessed area 2112, the recessed area 2112 is located at one end close to the connecting hole 215, and the recessed area 2112 forms a step surface on the side of the locking groove 211 close to the extension portion 216, the strip area 2111 slides with the pull rod 24, and the recessed area 2112 is used to lock the pull rod 24.

[0073] Combine Figure 2-8 10 provides a pull rod 24 structure applied to this embodiment, as Figure 6 、 10 As shown, the pull rod 24 includes two spaced connection walls, one end of the two connection walls is connected to form a connection end, and the connection end is provided with at least one mounting portion 244. Figure 6 、 10In the embodiment, there are two mounting parts 244, and a space for fixing the moving iron core 291 is reserved between the two mounting parts 244. Each mounting part 244 is fixedly connected to the moving iron core 291. A linkage hole 242 is provided at one end of each connecting wall away from the mounting part 244. A linkage shaft 25 for connecting with the push rod 22 is assembled in the linkage hole 242. A strip-shaped limiting groove 240 and a through-hole 247 are provided in the middle of each connecting wall. The through-hole 247 is located between the limiting groove 240 and the linkage hole 242. A shaft rod serving as a locking part 241 is assembled in the through-hole 247. The edge of one end of the connecting wall away from the mounting part 244 protrudes outward to form a connecting protrusion 245 and is provided with a limiting slot 246. A shaft rod serving as a second connecting part 243 is arranged in the limiting slot 246.

[0074] Combine Figure 2-8 12 and 13 provide a push rod 22 structure applied to this embodiment.

[0075] like Figure 12 As shown, the push rod 22 is a rod body with a certain degree of curvature. A hole connected to the push rod mounting shaft 202 is provided in the middle of the push rod 22. A linkage groove is provided at each end of the push rod 22. Each linkage groove is a strip-shaped groove. For the convenience of description, the two linkage grooves are divided into a first linkage groove 221 and a second linkage groove 222. The axial length of the first linkage groove 221 is larger, and the inner diameter at the end of the first linkage groove 221 away from the second linkage groove 222 is slightly increased, so that the first linkage groove 221 presents an irregular strip-shaped groove, which facilitates the cooperation between the first linkage groove 221 and the linkage shaft 25.

[0076] Combine Figure 2-9A rocker arm 28 structure is provided for use in this embodiment. The rocker arm 28 includes two rotating walls arranged at intervals. One end of the two rotating walls is connected to form a mounting wall 283. The mounting wall 283 is provided with a handle 27. A mounting hole 285 is provided in the middle of each rotating wall. A rocker arm mounting shaft 203 is provided in the mounting hole 285. The rocker arm mounting shaft 203 is supported between a pair of brackets 20, or the rocker arm mounting shaft 203 is provided on the bracket 20. A protrusion serving as a gate drive portion 282 is provided on the middle edge of the rotating wall. The rotating wall is provided with an open groove serving as a drive slot 281, and the mounting hole 285 is located between the mounting wall 283 and the drive slot 281. The drive slot 2 The opening of 81 and the opening drive part 282 are located on the same side edge of the rotating wall, and the end of the driving groove 281 away from the opening serves as the driving part 2811. The side wall of the driving groove 281 is provided with a spring connecting part 284, and one end of the rocker spring 262 is connected to the spring connecting part 284, and the other end can be connected to the locking part 241 of the pull rod 24. When closing the switch, the rocker spring 262 limits the rocker arm 28 to the closing position, making it convenient for the handle 27 to indicate that the operating mechanism is in the closing position. Correspondingly, when opening the switch, the linkage shaft 25 and the driving part 2811 abut against each other to limit the rocker arm 28 to the opening position, so that the handle 27 indicates that the operating mechanism is in the opening position.

[0077] Combine Figure 2 、 3 , 5-8 and 13 provide a traction rod 23 structure applied to this embodiment.

[0078] like Figure 13 As shown, the traction rod 23 is a rod structure as a whole. A bent rod as a tripping trigger portion 232 is provided on one side of the rod body of the traction rod 23. Each tripping trigger portion 232 cooperates with an unlocking portion 212 of the lock buckle 21. In this embodiment, the number of unlocking portions 212 is two, and correspondingly, the number of tripping trigger portions 232 is also two; a plurality of trigger portions are further provided in the middle of the traction rod 23, and each trigger portion is an extended plane. For the convenience of description, the plurality of trigger portions are a first trigger portion 231, a third trigger portion 233, a fourth trigger portion 234 and a fifth trigger portion 235, wherein the first trigger portion 231 is along the traction rod 23. The first trigger portion 231 and the tripping trigger portion 232 correspond to opposite sides of the traction rod 23. The third trigger portion 233 and the fifth trigger portion 235 are both located between two adjacent first trigger portions 231. The extension plane of the third trigger portion 233 is approximately perpendicular to the extension plane of the first trigger portion 231. The fifth trigger portion 235 forms a boss structure. The fourth trigger portion 234 and the tripping trigger portion 232 are located on the same side of the traction rod 23, and the fourth trigger portion 234 is located at one end of the traction rod 23. The fourth trigger portion 234 and the first trigger portion 231 extend approximately in opposite directions along the same plane.

[0079] Combine Figure 1-5 and 14 provide a specific structure of a circuit breaker.

[0080] like Figure 1 As shown, the circuit breaker includes a housing 1. Typically, the housing 1 consists of a base and a cover covering the base. A handle hole for a handle 27 to pass through is provided in the middle of the cover. The circuit breaker pole is provided in the base. Preferably, a partition is provided in the base, and two adjacent circuit breaker poles are separated by the partition. The operating mechanism is provided between the circuit breaker pole and the cover. The moving iron core 291 in the electromagnetic mechanism 29 moves in a straight line between the cover and the base, so that the movement trajectory of the pull rod 24 and the moving iron core 291 is parallel to the surface of the cover with the handle hole. The traction rod 23 spans all the circuit breaker poles. The first trigger portion 231 of the traction rod 23 corresponds to a circuit breaker pole respectively, and the first trigger portion 231 and the fifth trigger portion 235 extend in a direction close to the base. The plane where the third trigger portion 233 is located is parallel to the surface of the cover with the handle hole, and the fourth trigger portion 234 extends in a direction close to the cover.

[0081] The structure of each circuit breaker pole can adopt the existing technology, that is, each circuit breaker pole includes a pair of spaced-apart wiring terminals, each wiring terminal is provided at one end of the base and corresponds to the wiring port of the base, a contact system is connected between the pair of wiring terminals, and the contact system includes a movable contact assembly 31 and a stationary contact 32 that cooperate with each other, wherein the movable contact assembly 31 includes a rotating shaft 311 and a movable contact 312, the rotating shaft 311 is rotatably provided in the base, one end of the stationary contact 32 is spaced apart from the movable contact 312, and the other end extends toward the adjacent wiring terminal, such as Figure 1-5 As shown in FIG14 , the rotating shaft 311 is provided with a protrusion as a trip pull portion 3111 , and a trip spring 33 is connected between the trip pull portion 3111 and the base. Figure 1-5 In the figure, the opening spring 33 is a tension spring. When the push rod 22 is pulled to the opening position, the opening spring 33 cooperates to pull the rotating shaft 311, thereby pulling the moving contact 312 away from the static contact 32; an arc extinguishing system 4 is also provided on one side of the contact system, and the arc extinguishing system 4 can adopt existing technology.

[0082] Further, such as Figure 1-5 As shown, a control module 8 and an accessory module are also provided in the housing 1. The control module 8 includes a circuit board and a controller arranged on the circuit board. A current transformer 91 and a zero-sequence transformer 92 for feeding back current signals to the controller are also provided in the housing 1. The controller outputs a control signal to the electromagnetic mechanism 29 and the accessory module according to the received current signal and control command, so that the electromagnetic mechanism 29 and the accessory module operate according to the control signal.

[0083] In this embodiment, the accessory modules include an electromagnetic instantaneous release 5, a magnetic flux release 6, and a manual trip button 7. The electromagnetic instantaneous release 5, the magnetic flux release 6, and the manual trip button 7 are accessory modules using existing technologies. The electromagnetic instantaneous release 5 is provided in each circuit breaker pole and connected to the main line of each circuit breaker pole. Figure 2 、 3 In the embodiment, the electromagnetic instantaneous release 5 is disposed in the base, and the armature of the electromagnetic instantaneous release 5 cooperates with the first trigger portion 231 of the drawbar 23; the magnetic flux release 6 is disposed on the cover. Preferably, the cover is provided with a corresponding accessory slot, and the movable component of the magnetic flux release 6 cooperates with the fourth trigger portion 234. The manual trip button 7 is slidably assembled on the cover. By pressing the manual trip button 7, the manual trip button 7 triggers the third trigger portion 233. As a result, the accessory module drives the drawbar 23 to rotate, which in turn drives the lock catch 21 to unlock and rotate, thereby driving the operating mechanism to open the circuit breaker. Of course, the accessory module can also be configured with another functional unit to cooperate with the fifth trigger portion 235.

[0084] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0085] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An operating mechanism, comprising a pair of spaced-apart brackets (20), a rocker arm (28), a push rod (22) and a lock catch (21) rotatably mounted between the pair of brackets (20), a handle (27) being provided at one end of the rocker arm (28), the operating handle (27) driving the rocker arm (28) to swing for opening and closing, and the push rod (22) driving the moving contact assembly (31) to rotate for opening and closing, characterized in that: The pull rod (24) is slidably arranged between a pair of brackets (20) and slidably matched with the lock catch (21). The pull rod (24) is linked with one end of the push rod (22) and then driven and connected with the end of the rocker arm (28) away from the handle (27). When closing the switch, the rocker arm (28) drives the pull rod (24) and the push rod (22) to move to the closing position at the same time, and the pull rod (24) and the lock catch (21) are limited and matched. When the gate is opened, the rocker arm (28) drives the lock catch (21) to unlock and rotate, so that the lock catch (21) first releases the limit fit with the pull rod (24), and the pull rod (24) and the push rod (22) then move to the opening position respectively.

2. The operating mechanism according to claim 1, characterized in that: The rocker arm (28) is provided with a driving groove (281) and a gate-opening driving portion (282). A driving portion (2811) is provided inside the driving groove (281). The push rod (22) is linked to one end of the pull rod (24) via a linkage shaft (25). The linkage shaft (25) is slidably matched with the bracket (20) and is located in the driving groove (281). When the switch is closed, the driving part (2811) drives the linkage shaft (25) to move, and when the switch is opened, the opening driving part (282) drives the lock catch (21) to rotate, and the linkage shaft (25) moves in the driving groove (281) until it abuts against the driving part (2811).

3. The operating mechanism according to claim 2, characterized in that: The invention also includes a rocker spring (262), which is connected between the pull rod (24) and the rocker arm (28). When the switch is closed, the pull rod (24) locks the rocker arm (28) to the closed position through the rocker spring (262). When the switch is opened, the linkage shaft (25) abuts against the driving part (2811) to limit the rocker arm (28) to the open position.

4. The operating mechanism according to claim 3, characterized in that: A sliding limiting structure is provided between the pull rod (24) and the bracket (20), and / or a sliding limiting structure is provided between the pull rod (24) and the lock buckle (21), and the sliding limiting structure limits the pull rod (24) from moving in a straight line.

5. The operating mechanism according to claim 4, characterized in that: The lock catch (21) is provided with a locking groove (211) and a brake-opening matching portion (214), and the middle portion of the pull rod (24) is provided with a locking portion (241). When the switch is closed and the pull rod (24) moves to the closed position, the locking portion (241) and the locking groove (211) are limitedly engaged; When the gate is opened, the gate opening driving portion (282) of the rocker arm (28) triggers the gate opening matching portion (214) to drive the lock catch (21) to unlock and rotate, and the locking portion (241) first releases the limiting matching with the locking groove (211), and then the locking portion (241) slides and matches with the locking groove (211) until the pull rod (24) moves to the gate opening position.

6. The operating mechanism according to claim 5, characterized in that: It also includes a locking elastic member (261), the end of the lock buckle (21) close to the push rod (22) is provided with a first connecting portion (213), the end of the pull rod (24) close to the push rod (22) is provided with a second connecting portion (243), the two ends of the locking elastic member (261) are respectively connected to the first connecting portion (213) and the second connecting portion (243), and the locking portion (241) is limited in the locking groove (211) by the elastic force of the locking elastic member (261).

7. The operating mechanism according to claim 5, characterized in that: The locking groove (211) includes a strip area (2111) and a recessed area (2112). The recessed area (2112) is connected to one end of the strip area (2111) away from the push rod (22), so that a step surface is formed on one side wall of the locking groove (211). The strip area (2111) and the locking portion (241) are slidably matched to limit the moving stroke of the pull rod (24). When the pull rod (24) moves to the closing position, the locking portion (241) is limited by the recessed area (2112).

8. The operating mechanism according to claim 5, characterized in that: The invention also includes a rotatably assembled traction rod (23), wherein the traction rod (23) is adjacent to the lock buckle (21), and the lock buckle (21) is further provided with an unlocking portion (212). When the gate is opened, the traction rod (23) triggers the unlocking portion (212) to drive the lock buckle (21) to rotate and unlock.

9. The operating mechanism according to claim 5, characterized in that: The rocker arm (28) comprises two rotating walls arranged at intervals, one end of the two rotating walls being connected to form a mounting wall (283), the mounting wall (283) being provided with a handle (27), a mounting hole (285) being provided in the middle of each rotating wall, a rocker arm mounting shaft (203) being provided in the mounting hole (285), the rocker arm mounting shaft (203) being supported between a pair of brackets (20), a protrusion serving as a gate opening drive portion (282) being provided on the middle edge of the rotating wall, The rotating wall is provided with an open groove serving as a driving groove (281), and the mounting hole (285) is located between the mounting wall (283) and the driving groove (281). The opening of the driving groove (281) and the gate drive portion (282) are located on the same side edge of the rotating wall. The end of the driving groove (281) away from the opening serves as the driving portion (2811), and the side wall of the driving groove (281) is provided with a spring connection portion (284).

10. The operating mechanism according to claim 5, characterized in that: The bracket (20) is provided with a lock buckle installation shaft (201), the lock buckle (21) is rotatably assembled on the lock buckle installation shaft (201), and the pull rod (24) is provided with a limiting sliding groove (240) for the lock buckle installation shaft (201) to pass through.

11. The operating mechanism according to claim 5, characterized in that: A linkage shaft (25) is provided at one end of the pull rod (24), and the middle part of the push rod (22) is rotatably connected between a pair of brackets (20). A linkage groove is provided at each end of the push rod (22), and the linkage shaft (25) is linked to one linkage groove, and the other linkage groove is used for driving connection with the rotating shaft (311) of the moving contact assembly (31).

12. The operating mechanism according to claim 5, characterized in that: The pull rod (24) includes two spaced-apart connecting walls, one end of the two connecting walls is connected to form a connecting end, the connecting end is provided with at least one mounting portion (244), and the end of each connecting wall away from the mounting portion (244) is provided with a linkage hole (242), and the linkage hole (242) is equipped with a linkage shaft (25) for connecting with the push rod (22), and the middle part of each connecting wall is provided with a strip-shaped limiting groove (240) and a through hole (247), and the through hole (247) is located between the limiting groove (240) and the linkage hole (242), and the through hole (247) is equipped with a shaft rod serving as a locking portion (241), and the edge of one end of the connecting wall away from the mounting portion (244) protrudes outward to form a connecting protrusion (245) and is provided with a limiting slot (246), and the limiting slot (246) is provided with a shaft rod serving as a second connecting portion (243).

13. The operating mechanism according to claim 5, characterized in that: The lock catch (21) includes two spaced-apart matching walls, one side edge of the two matching walls are connected to form a U-shaped lock catch body (210), the lock catch body (210) has a space for sliding with the pull rod (24), the other side edge of the matching wall serves as a gate matching portion (214), one end plate of the matching wall is provided with a connecting hole (215), the connecting hole (215) is for the lock catch mounting shaft (201) assembled on the bracket (20) to pass through, the other end edge of the matching wall extends outward to form an extension portion (216), the extension portion (216) is provided with an axial hole (217), the axial hole (217) ) is equipped with an axle rod as a first connecting part (213), and the end of the first connecting part (213) serves as an unlocking part (212). A locking groove (211) is provided in the middle of the matching wall. The locking groove (211) includes a strip area (2111) and a recessed area (2112). The recessed area (2112) is located at one end close to the connecting hole (215), and the recessed area (2112) forms a step surface on the side of the locking groove (211) close to the extension part (216). The strip area (2111) is slidably matched with the pull rod (24), and the recessed area (2112) is used to lock the pull rod (24).

14. A circuit breaker comprising a housing (1), wherein at least one contact system is provided in the housing (1), wherein the contact system comprises a movable contact assembly (31) and a stationary contact (32) that cooperate with each other, and wherein: It also includes an operating mechanism as described in any one of claims 1-13.

15. The circuit breaker according to claim 14, wherein: The moving contact assembly (31) comprises a rotating shaft (311) and a moving contact (312); the rotating shaft (311) is rotatably assembled in the housing (1); the moving contact (312) is connected to the rotating shaft (311); a trip spring (33) is further connected between the rotating shaft (311) and the housing (1); after the lock catch (21) and the pull rod (24) are released from the limiting engagement, the trip spring (33) drives the rotating shaft (311) to rotate in a tripping manner.

16. The circuit breaker according to claim 14 or 15, characterized in that: It also includes an electromagnetic mechanism (29), which is connected to one end of the pull rod (24) away from the push rod (22), and is driven by the electromagnetic mechanism (29) to move the pull rod (24) in a straight line between the opening position and the closing position.

17. The circuit breaker according to claim 14 or 15, characterized in that: At least one accessory module is also provided in the housing (1), and the accessory module triggers the traction rod (23) to rotate to drive the contact system to open.

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