CN215869169U

CN215869169U - Circuit breaker

Info

Publication number: CN215869169U
Application number: CN202121289847.8U
Authority: CN
Inventors: 杨以亮; 吴昊; 付浩; 沈维佳; 李凌飞; 徐永富; 韦尚靖; 王寰雨; 张敏翔; 陈杰稳
Original assignee: Huawei Technologies Co Ltd; Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Huawei Technologies Co Ltd; Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-02-18
Anticipated expiration: 2031-06-09

Abstract

The utility model relates to the field of low-voltage electricity, in particular to a circuit breaker, which comprises a circuit breaker shell and an operating mechanism arranged in the circuit breaker shell, wherein the operating mechanism comprises a rocker arm assembly, and the rocker arm assembly swings to enable the circuit breaker to be switched on or switched off; the circuit breaker further comprises an anti-hot-plugging locking structure, the anti-hot-plugging locking structure comprises a push rod in driving fit with the rocker arm assembly, and the push rod comprises a push rod locking part; the rocker arm assembly swings to enable the circuit breaker to be switched on, and meanwhile, the push rod locking part is driven to protrude out of the shell of the circuit breaker and is used for being matched with an assembling shell of an assembling position of the circuit breaker; the circuit breaker provided by the utility model has the hot plugging prevention locking structure, and can effectively prevent the circuit breaker from being pulled out or inserted into an assembly position in a closing state.

Description

Circuit breaker

Technical Field

The utility model relates to the field of low-voltage electricity, in particular to a circuit breaker.

Background

A circuit breaker is one of important electrical components in the field of low-voltage electrical, and is used for connecting and disconnecting current; the circuit breaker automatically cuts off the circuit when overcurrent occurs or short circuit occurs in the circuit, and protection of a power supply line, a motor and the like is achieved. Wherein, plug-in circuit breaker does not generally set up antistatic pulling and inserting locking structure, can be under the combined floodgate condition by the assembly position of disect insertion or extraction circuit breaker, has the potential safety hazard, and light then leads to the outage, and the personal safety is then endangered to the weight.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a circuit breaker, which is an anti-hot-plugging locking structure and can effectively prevent the circuit breaker from being pulled out or inserted into an assembly position in a closing state.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a circuit breaker comprises a circuit breaker shell and an operating mechanism arranged in the circuit breaker shell, wherein the operating mechanism comprises a rocker arm assembly, and the rocker arm assembly swings to enable the circuit breaker to be switched on or switched off; the circuit breaker further comprises an anti-hot-plugging locking structure, the anti-hot-plugging locking structure comprises a push rod in driving fit with the rocker arm assembly, and the push rod comprises a push rod locking part; the swing arm assembly swings to enable the breaker to be switched on, and meanwhile, the driving push rod locking portion protrudes out of the shell of the breaker and is used for being matched with the assembling position of the breaker.

Preferably, the push rod is arranged along a direction perpendicular to the direction of inserting the circuit breaker into the assembly position and is arranged on the circuit breaker shell in a sliding mode, and the push rod locking portion can extend out of the circuit breaker shell and retract into the circuit breaker shell.

Preferably, prevent hot plug locking structure still include both ends respectively with push rod and circuit breaker casing complex push rod reset spring, the circuit breaker separating brake or the back of threading off, push rod reset spring makes the push rod locking part of push rod reset, inside the withdrawal circuit breaker casing.

Preferably, the push rod further comprises a push rod stress part in driving fit with the rocker arm assembly, the push rod stress part is located on one side of the rocker arm assembly, the rocker arm assembly comprises a rocker arm and a rocker arm driving part, the rocker arm driving part is arranged on the outer side of the rocker arm, and the rocker arm assembly pushes the push rod stress part through the rocker arm driving part during closing.

Preferably, the push rod is installed on the circuit breaker casing, be equipped with in the circuit breaker casing with push rod sliding fit's push rod sliding tray, the push rod can be along push rod sliding tray rectilinear movement, push rod reset spring installs the push rod locking portion of drive push rod in the circuit breaker casing and removes to circuit breaker casing inside.

Preferably, when the circuit breaker is in a brake-separating state, a tripping state or a re-buckling state, the rocker arm driving part is separated from the push rod stress part.

Preferably, the push rod comprises a push rod main body, a push rod stress part in driving fit with the rocker arm assembly and a push rod spring connecting part in fit with the reset spring, the push rod locking part is connected with one end of the push rod main body, and the push rod stress part and the push rod spring connecting part are both connected with the other end of the push rod main body;

the push rod locking part comprises a locking part connecting plate and a push rod locking plate, one end of the locking part connecting plate is connected with the push rod main body in a bending mode, the other end of the locking part connecting plate is connected with the push rod locking plate, and the side face of the push rod locking part is perpendicular to the side face of the push rod main body;

the push rod stress part bulge is arranged on one side edge of the other end of the push rod main body, the side surface of the push rod stress part and the side surface of the push rod main body 10 are located on the same plane, and the side edge of the push rod stress part in the vertical direction is matched with the rocker arm.

Preferably, the rocker arm driving part comprises a driving part mounting shaft arranged on the rocker arm and a driving part shaft sleeve rotatably sleeved on the driving part mounting shaft, and the driving part shaft sleeve is in driving fit with the push rod stress part.

Preferably, the push rod stress part is provided with a stress part arc-shaped surface matched with the driving part shaft sleeve.

Preferably, the operating mechanism further comprises a mechanism support, a jump buckle, a lock catch, a crank, a connecting rod and a re-buckle, wherein the jump buckle, the lock catch, the rocker arm assembly and the re-buckle are respectively and rotatably arranged on the mechanism support, the jump buckle is matched with the lock catch, the lock catch is in limit matching with the re-buckle, the crank is rotatably connected with the jump buckle, one end of the connecting rod is rotatably connected with the crank, and the other end of the connecting rod is rotatably connected with a moving contact of the circuit breaker;

the circuit breaker further comprises a wiring terminal, the wiring terminal comprises an incoming wiring terminal and an outgoing wiring terminal, the incoming wiring terminal and the outgoing wiring terminal are located at the same end of the circuit breaker shell, and the wiring terminal and the operating mechanism are respectively arranged at two opposite ends of the circuit breaker shell.

According to the circuit breaker, the hot plug prevention locking structure is adopted, the push rod locking part of the hot plug prevention locking structure protrudes out of the shell of the circuit breaker when the circuit breaker is switched on, the circuit breaker can be prevented from being inserted into or pulled out of an assembly position of the circuit breaker in a switching-on state, and the power utilization stability and safety are guaranteed.

In addition, the push rod is slidably mounted in the shell of the circuit breaker, so that the action of the existing operating mechanism is not influenced, and the existing operating mechanism is not required to be improved.

In addition, the rocker arm assembly drives the stress part arc-shaped surface of the push rod through the rotating driving part shaft sleeve, so that the driving process is smooth and cannot be blocked, and the closing operation is not influenced.

Drawings

FIG. 1 is a schematic structural diagram of a circuit breaker according to the present invention, wherein the circuit breaker is in a closing state, and an anti-hot-plugging locking structure is in limit fit with an assembly position housing;

FIG. 2 is a schematic structural diagram of the circuit breaker of the present invention, wherein the circuit breaker is in a trip state, and the hot plug preventing locking structure is disengaged from the assembly position housing;

FIG. 3 is a schematic structural diagram of the circuit breaker of the present invention, wherein the circuit breaker is in an open or re-buckled state, and the anti-hot-plugging locking structure is disengaged from the assembly position housing;

FIG. 4 is a schematic view of the mating structure of the rocker arm assembly and the hot plug prevention locking structure of the present invention;

FIG. 5 is an exploded view of the hot plug lockout and rocker arm assembly of the present invention.

Detailed Description

The following description will further describe embodiments of the circuit breaker of the present invention with reference to the embodiments shown in fig. 1 to 5. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1 to 5, an embodiment of the circuit breaker of the present invention includes a circuit breaker housing 9 and an operating mechanism disposed in the circuit breaker housing 9, wherein the operating mechanism includes a rocker arm assembly 2, and the rocker arm assembly 2 swings to close or open the circuit breaker; the circuit breaker further comprises an anti-hot-plugging locking structure, the anti-hot-plugging locking structure comprises a push rod 1 in driving fit with the rocker arm assembly 2, and the push rod 1 comprises a push rod locking part 11; the swing arm assembly 2 swings to close the circuit breaker, and simultaneously drives the push rod locking part 11 to protrude out of the circuit breaker shell 9 and is used for being matched with an assembling position of the circuit breaker. Further, the push rod locking portion 11 protrudes outside the circuit breaker housing 9 to be fitted with a fitting position housing of a fitting position. Of course, the pushrod locking portion 11 may be engaged with a wall or a bracket or the like that constitutes (or constitutes) the fitting.

As shown in fig. 1, when the circuit breaker is in a closed state, the push rod locking part 11 of the push rod 1 protrudes out of the circuit breaker housing 9, and if the circuit breaker is already installed at an assembly position, the push rod locking part 11 is in limit fit with the assembly position housing 8 of the assembly position to prevent the circuit breaker from being pulled out; if the circuit breaker is to be installed to the assembly station, the push rod locking portion 11 is in limit fit with the assembly station housing 8 to prevent the circuit breaker from being installed in place.

As shown in fig. 1-5, the circuit breaker of this embodiment is an insertion type molded case circuit breaker, the insertion type molded case circuit breaker further includes a connection terminal, the connection terminal includes an incoming line connection terminal and an outgoing line connection terminal, the incoming line connection terminal and the outgoing line connection terminal are both located at the same end of the circuit breaker housing, and the connection terminal and the operating mechanism are respectively disposed at two opposite ends of the circuit breaker housing. During assembly, the connecting terminal is inserted into an assembly position shell 8 of an assembly position, the connecting terminal is in inserting fit with a bus in the assembly position shell 8, and a limiting hole matched with the push rod locking part 11 is formed in the assembly position shell 8. The assembly position refers to a structure for assembling and accommodating a cabinet, a power distribution cabinet, a distribution box and the like of the circuit breaker, and the assembly position shell 8 is a corresponding shell structure.

This embodiment circuit breaker, its operating device still include mechanism's support, jump and detain, hasp, crank, connecting rod and detain again, jump detain, hasp, rocking arm subassembly 2 and detain again and rotate the setting on mechanism's support respectively, jump detain and hasp cooperation, the hasp with detain spacing cooperation again, the crank with jump detain to rotate continuously, connecting rod one end rotates with the crank and links to each other, the other end rotates with the moving contact of circuit breaker and links to each other. Furthermore, this embodiment circuit breaker still includes trip bar, short-circuit protection mechanism and overload protection mechanism, and short-circuit protection mechanism and overload protection mechanism cooperate with the trip bar drive respectively, and the trip bar cooperates with the drive of detaining again, and when the overload or short-circuit fault takes place, short-circuit protection mechanism or overload protection mechanism drive trip bar rotate, and the trip bar drive is detained again and is relieved spacing cooperation with the hasp, makes hasp and jump and detain and relieve the hasp cooperation, and the circuit breaker is tripped.

Preferably, as shown in fig. 1 to 3, the push rod 1 is disposed in a direction perpendicular to a direction of inserting the circuit breaker into the assembly position and slidably disposed on the circuit breaker housing 9, and the push rod locking portion 11 can be extended out of the circuit breaker housing 9 or retracted into the circuit breaker housing 9. Specifically, as shown in the directions of fig. 1 to 3, the circuit breaker is inserted into the assembly site in the vertical direction, and the push rod 1 is arranged in the horizontal direction; when the circuit breaker is switched on, the push rod locking part 11 is driven by the rocker arm component 2 to move leftwards and extend out of the circuit breaker shell 9; when the circuit breaker is opened or tripped, the push rod locking part 11 moves rightwards under the action of the push rod reset spring 3 of the hot plugging prevention locking structure and retracts into the circuit breaker shell 9.

Preferably, as shown in fig. 1-3, the rocker arm assembly 2 drives the pushrod 1 to translate such that the pushrod lock 11 protrudes outside the circuit breaker housing 9. Specifically, the pushrod 1 can translate left and right to extend or retract the pushrod lock 11 into the circuit breaker housing 9, as oriented in fig. 1-3.

Preferably, as shown in fig. 1 to 3, the hot plug prevention locking structure further includes a push rod return spring 3, and after the circuit breaker is opened or tripped, the push rod return spring 3 returns the push rod 1 to retract into the circuit breaker housing 9. Further, as shown in fig. 1 to 3, both ends of the push rod return spring 3 are respectively engaged with the push rod 1 and the circuit breaker housing 9. Further, as shown in fig. 1 to 3, two ends of the push rod return spring 3 respectively abut against the push rod 1 and the circuit breaker housing 9, and the push rod return spring 3 is compressed between the push rod 1 and the circuit breaker housing 9.

As shown in fig. 4-5, the push rod 1 further includes a push rod force-receiving portion 12, the rocker arm assembly 2 includes a rocker arm driving portion 21 in driving engagement with the push rod force-receiving portion 12, and the rocker arm assembly 2 pushes the push rod force-receiving portion 12 through the rocker arm driving portion 21 during closing.

As shown in fig. 1, when the circuit breaker is closed, the rocker arm assembly 2 drives the push rod 1 to move, so that the push rod locking part 11 protrudes out of the circuit breaker housing 9. When the circuit breaker is installed at the assembling position and is in a closing state, the push rod locking part 11 is matched with the lower position of the assembling position shell 8 of the assembling position to prevent the circuit breaker from being pulled out in the closing state. The circuit breaker is in the combined floodgate state, will install the circuit breaker to the assembly position, because push rod locking part 11 prevents the circuit breaker assembly to target in place with the spacing cooperation of assembly position casing 8, then the circuit breaker can not assemble under the combined floodgate state. As shown in fig. 2, when the circuit breaker is installed in the assembly position and in the trip state, the rocker driving portion 21 is separated from the push rod receiving portion 12, the push rod locking portion 11 moves into the circuit breaker housing 9, and the circuit breaker can be normally installed in the assembly position or pulled out. As shown in fig. 3, when the circuit breaker is installed in the assembly position and is in the opening state or the re-buckling state, the rocker arm assembly 21 is separated from the push rod force-receiving portion 12, the push rod locking portion 11 moves into the circuit breaker housing 9, and the circuit breaker can be normally installed in the assembly position or pulled out. Specifically, as shown in fig. 1-3, the rocker arm assembly 2 swings counterclockwise to close the circuit breaker, and simultaneously the rocker arm assembly 2 drives the push rod 1 to translate to the left side, so that the push rod locking portion 11 protrudes out of the circuit breaker housing 9 and is in limit fit with the assembly position housing 8; when the circuit breaker of the embodiment is opened, tripped or buckled again, the rocker arm component 2 swings clockwise, meanwhile, the rocker arm component driving part 21 of the rocker arm component 2 releases the limit fit with the push rod stress part 12, the push rod 1 translates towards the right side under the action of the push rod reset spring 3, the push rod locking part 11 moves towards the inside of the circuit breaker shell 9, and the limit fit with the assembly position shell 8 is released.

As shown in fig. 4 and 5, a preferred embodiment of the push rod 1 and rocker arm assembly 2 cooperate. Push rod 1 installs on circuit breaker casing 9, wholly is located one side of rocking arm subassembly 2, is equipped with the push rod sliding tray with push rod 1 sliding fit in circuit breaker casing 9, and push rod 1 can be along push rod sliding tray rectilinear movement, and push rod reset spring 3 installs and drives push rod sticking portion 11 of push rod 1 and move to circuit breaker casing 9 inside in circuit breaker casing 9, and rocking arm subassembly 2 promotes push rod atress portion 12 through rocking arm drive portion 21 and makes push rod sticking portion 11 salient circuit breaker casing 9 outside during closing. Preferably, the push rod force-receiving portion 12 of the push rod 1 is located at one side of the rocker arm assembly 2, the rocker arm assembly 2 includes a rocker arm 20 rotatably disposed and a rocker arm driving portion 21 protruding from an outer side of the rocker arm 20, and the rocker arm assembly 2 pushes the push rod force-receiving portion 12 through the rocker arm driving portion 21 during switching on. When the circuit breaker is in a brake-off state, a tripping state or a re-buckling state, the rocker arm driving part 21 is separated from the push rod stress part 12.

The push rod 1 of the embodiment is slidably mounted in the breaker shell 9, the mounting and resetting actions of the push rod are irrelevant to the rocker arm assembly 2, the action of the existing operating mechanism cannot be influenced, and the existing operating mechanism does not need to be improved too much.

Preferably, as shown in fig. 4-5, the rocker arm driving part 21 includes a driving part mounting shaft 211 disposed on the rocker arm 20, and a driving part bushing 210 rotatably sleeved on the driving part mounting shaft 211, wherein the driving part bushing 210 is in driving engagement with the push rod receiving part 12. Further, the push rod driving portion 12 includes a force receiving portion arc surface 120 that cooperates with the rocker arm driving portion 21 of the rocker arm assembly 2. The arc-shaped surface 120 of the stress part of the push rod 1 is driven by the rotating driving part shaft sleeve 210, so that the driving process is smooth and cannot be blocked, and the existing closing operation is not influenced.

As shown in fig. 4 and 5, an embodiment of the push rod 1 is: the push rod 1 comprises a push rod main body 10, a push rod locking portion 11, a push rod stress portion 12 in driving fit with the rocker arm assembly 2 and a push rod spring connecting portion 13 in fit with the push rod reset spring 3, the push rod locking portion 11 is connected with one end of the push rod main body 10, and the push rod stress portion 12 and the push rod spring connecting portion 13 are both connected with the other end of the push rod main body 10. Preferably, the push rod force-receiving portion 12 and the push rod spring connecting portion 13 are disposed opposite to each other and located on two sides of the push rod body 10.

Preferably, as shown in fig. 4 and 5, the putter locking part 11 includes a locking part connecting part 110 and a putter locking plate 111, one end of the locking part connecting plate 110 is connected to the putter body 10 in a bent manner, and the other end is connected to the putter locking plate 111; the rocker arm assembly 2 swings to close the circuit breaker, and simultaneously the rocker arm assembly 2 drives the push rod 1 to act to enable the push rod locking plate 111 to protrude out of the circuit breaker shell 9. Further, as shown in fig. 4 and 5, the push rod locking portion 11 is integrally formed in an L-shaped plate structure, the push rod body 10 is formed in a bar plate structure, and a side surface of the push rod locking portion 11 is perpendicular to a side surface of the push rod body 10.

Preferably, the upper and lower sides of the other end of the push rod body 10 are respectively protruded to form a push rod force-receiving portion 12 and a push rod spring connecting portion 13. The push rod stress part 12 is convexly arranged on the upper side edge of the other end of the push rod main body 10, the side surface of the push rod stress part 12 and the side surface of the push rod main body 10 are positioned on the same plane, and the side edge of the push rod stress part 12 in the vertical direction is matched with the rocker arm 20; preferably, a force-bearing part arc-shaped surface 120 matched with the rocker arm driving part 21 of the rocker arm assembly 2 is arranged on the side edge of the push rod force-bearing part 12 in the vertical direction, and the force-bearing part arc-shaped surface 120 is in driving fit with a driving part shaft sleeve 210 of the rocker arm driving part 21.

Preferably, the pushrod spring connecting portion 13 includes a connecting portion transition plate 130, a connecting portion bottom plate 131 and a connecting portion limiting post 132, the connecting portion transition plate 130 and the connecting portion limiting post 132 are arranged at an interval and are respectively bent and connected with two ends of the connecting portion bottom plate 131, the connecting portion transition plate 130 is further connected with the pushrod main body 10, the pushrod return spring 3 is sleeved on the connecting portion limiting post 132, one end of the pushrod return spring is matched with the connecting portion bottom plate 131, and the other end of the pushrod return spring is matched with the circuit breaker housing 9. Further, as shown in fig. 4 to 5, the push rod spring connecting portion 13 is integrally formed in a U-shaped structure. Specifically, as shown in fig. 1, when the circuit breaker of the present embodiment is in a closing state, the push rod return spring 3 is compressed; as shown in fig. 2 and 3, when the circuit breaker of this embodiment is tripped, opened or re-tripped, the push rod return spring 3 expands to drive the push rod 1 to return.

Preferably, the push rod body 10, the push rod driving part 12 and the push rod transition plate 130 are coplanar.

Preferably, the push rod 1 is of an integrated structure and is formed by cutting and bending a metal plate.

As shown in fig. 4 and 5, is one embodiment of the rocker arm assembly 2: the rocker arm assembly 2 includes a rocker arm 20 rotatably provided and a rocker arm driving portion 21 provided on the rocker arm 20. The rocker arm 20 is of a U-shaped structure and comprises rocker arm support plates 200 and a rocker arm connecting plate 201, the two rocker arm support plates 200 are oppositely arranged at intervals and are respectively bent and connected with two ends of the rocker arm connecting plate 201, the two rocker arm support plates 200 are bent towards the same side of the rocker arm connecting plate 201, and the free end of the rocker arm connecting plate 201 is rotatably arranged.

Preferably, the rocker arm driving portion 21 is protrudingly mounted on the outer side of one rocker arm fulcrum 200, i.e. the side far away from the other rocker arm fulcrum 200, the rocker arm driving portion 21 includes a driving portion mounting shaft 211 arranged on the rocker arm 20 and a driving portion bushing 210 rotatably sleeved on the driving portion mounting shaft 211, and the driving portion bushing 210 is in driving fit with the push rod force-receiving portion 12. One end of the drive section mounting shaft 211 is connected to one rocker arm brace 200.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. A circuit breaker comprises a circuit breaker shell (9) and an operating mechanism arranged in the circuit breaker shell (9), wherein the operating mechanism comprises a rocker arm assembly (2), and the rocker arm assembly (2) swings to close or open the circuit breaker; the method is characterized in that: the circuit breaker further comprises an anti-hot-plugging locking structure, the anti-hot-plugging locking structure comprises a push rod (1) in driving fit with the rocker arm assembly (2), and the push rod (1) comprises a push rod locking part (11); the rocker arm assembly (2) swings to enable the circuit breaker to be switched on, and meanwhile, the push rod locking portion (11) is driven to protrude out of the circuit breaker shell (9) and is used for being matched with the assembling position of the circuit breaker.

2. The circuit breaker of claim 1, wherein: the push rod (1) is arranged in a circuit breaker shell (9) which is arranged in a sliding mode in a direction perpendicular to the direction of inserting the circuit breaker into the assembly position, and the push rod locking portion (11) can extend out of the circuit breaker shell (9) and retract into the circuit breaker shell (9).

3. The circuit breaker of claim 1, wherein: prevent hot plugging locking structure still includes both ends respectively with push rod (1) and circuit breaker casing (9) complex push rod reset spring (3), behind the circuit breaker separating brake or the dropout, push rod reset spring (3) make push rod locking portion (11) of push rod (1) reset, inside withdrawal circuit breaker casing (9).

4. The circuit breaker of claim 1, wherein: push rod (1) still include with rocking arm subassembly (2) drive complex push rod atress portion (12), push rod atress portion (12) are located one side of rocking arm subassembly (2), rocking arm subassembly (2) including rotate rocking arm (20) that set up and set up at the bellied rocking arm drive portion (21) in rocking arm (20) outside, rocking arm subassembly (2) promote push rod atress portion (12) through rocking arm drive portion (21) during the combined floodgate.

5. The circuit breaker of claim 4, wherein: push rod (1) are installed on circuit breaker casing (9), be equipped with in circuit breaker casing (9) with push rod (1) sliding fit's push rod sliding tray, push rod (1) can be along push rod sliding tray rectilinear movement, push rod reset spring (3) are installed and are driven push rod locking portion (11) of push rod (1) to circuit breaker casing (9) inside removal in circuit breaker casing (9).

6. The circuit breaker of claim 4, wherein: when the circuit breaker is in a brake-separating state, a tripping state or a re-buckling state, the rocker arm driving part (21) is separated from the push rod stress part (12).

7. The circuit breaker according to any one of claims 1-6, wherein: the push rod (1) comprises a push rod main body (10), a push rod stress part (12) in driving fit with the rocker arm assembly (2) and a push rod spring connecting part (13) in fit with the reset spring (3), the push rod locking part (11) is connected with one end of the push rod main body (10), and the push rod stress part (12) and the push rod spring connecting part (13) are both connected with the other end of the push rod main body (10);

the push rod locking part (11) comprises a locking part connecting plate (110) and a push rod locking plate (111), one end of the locking part connecting plate (110) is connected with the push rod main body (10) in a bending mode, the other end of the locking part connecting plate is connected with the push rod locking plate (111), and the side face of the push rod locking part (11) is perpendicular to the side face of the push rod main body (10);

the push rod stress part (12) is arranged on one side edge of the other end of the push rod main body (10) in a protruding mode, the side face of the push rod stress part (12) and the side face of the push rod main body (10) are located on the same plane, and the side edge of the push rod stress part (12) in the vertical direction is matched with the rocker arm (20).

8. The circuit breaker of claim 4, wherein: the rocker arm driving part (21) comprises a driving part mounting shaft (211) arranged on the rocker arm (20) and a driving part shaft sleeve (210) rotatably sleeved on the driving part mounting shaft (211), and the driving part shaft sleeve (210) is in driving fit with the push rod stress part (12).

9. The circuit breaker according to claim 4 or 8, characterized in that: the push rod stress part (12) is provided with a stress part arc-shaped surface (120) matched with the driving part shaft sleeve (210).

10. The circuit breaker of claim 1, wherein: the operating mechanism further comprises a mechanism support, a jump buckle, a lock catch, a crank, a connecting rod and a re-buckle, wherein the jump buckle, the lock catch, the rocker arm assembly (2) and the re-buckle are respectively and rotatably arranged on the mechanism support, the jump buckle is matched with the lock catch, the lock catch is in limit matching with the re-buckle, the crank is rotatably connected with the jump buckle, one end of the connecting rod is rotatably connected with the crank, and the other end of the connecting rod is rotatably connected with a moving contact of the circuit breaker;

the circuit breaker further comprises a wiring terminal, the wiring terminal comprises an incoming wiring terminal and an outgoing wiring terminal, the incoming wiring terminal and the outgoing wiring terminal are located at the same end of the circuit breaker shell, and the wiring terminal and the operating mechanism are respectively arranged at two opposite ends of the circuit breaker shell (9).