CN115602502A - Circuit breaker tripping structure - Google Patents

Abstract

The embodiment of the application provides a circuit breaker tripping structure. The circuit breaker tripping structure comprises a circuit breaker and a tripping mechanism arranged on the circuit breaker, wherein the tripping mechanism is additionally arranged on the circuit breaker; the tripping mechanism comprises a tripping rocker, the tripping rocker comprises a pivoting connection end, a free rotation end and a handle connection end, the handle connection end is connected with the handle, the free rotation end is connected with the operating mechanism, and the tripping rocker rotates through the pivoting connection end; when the breaker is opened, the handle drives the handle connecting end to drive the tripping rocker to rotate, and the free rotating end of the tripping rocker triggers the operating mechanism to trip to perform the opening operation of the breaker; through the additional tripping mechanism, the operating mechanism is directly triggered by the handle to trip when the breaker is opened, and the breaker is quickly opened through the energy storage spring in the operating mechanism.

Description

Circuit Breaker Trip Structure

technical field

The application relates to the field of low-voltage electrical appliances, in particular to a circuit breaker tripping structure.

Background technique

A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The division of high and low voltage boundaries is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. The combination with overheating and underheating relays, etc., and generally does not need to change parts after breaking the fault current, has been widely used at present.

At present, the miniature circuit breaker can realize fast closing through the energy storage structure, but it cannot realize fast disconnection due to space constraints, that is, the breaking speed of the contact system when disconnecting the circuit is related to the speed of operating the disconnecting handle. Causes burnout of the circuit breaker contact system.

Contents of the invention

The purpose of the present application is to overcome the defects of the prior art and provide a circuit breaker tripping structure with fast opening of the circuit breaker and safe and stable performance.

In order to achieve the above object, the application adopts the following technical solutions:

A circuit breaker tripping structure, including a circuit breaker, the circuit breaker includes a housing and a handle pivotally connected to the top of the housing, the handle is connected to an operating mechanism, and the handle drives the operating mechanism to perform the opening and closing operation of the circuit breaker It also includes a tripping mechanism installed on the circuit breaker; the tripping mechanism includes a tripping rocker, and the tripping rocker includes a pivot connection end, a free rotation end and a handle connection end, and the handle connection end is connected to the handle , the free rotation end is connected with the operating mechanism, and the tripping rocker rotates through the pivoting connection end; when the circuit breaker is opened, the handle drives the handle connection end to drive the tripping rocker to rotate, and the free rotation end of the tripping rocker triggers the operating mechanism The trip performs the opening operation of the circuit breaker.

Further, the tripping mechanism is located on the outer side of the circuit breaker housing.

Further, the operating mechanism of the circuit breaker includes a snap fit lock and jumper. When the lock is driven to release the snap fit with the jumper, the operating mechanism is released to drive the moving contact to separate from the static contact.

Further, the tripping rocker includes a first end arm and a second end arm; the pivot connection end is provided at the joint of the first end arm and the second end arm, and the free rotation end is provided at the first end arm. The end of the end arm, the handle connecting end is arranged at the end of the second end arm.

Further, the connection end of the handle is the first stroke hole opened at the end of the second end arm.

Further, the freely rotating end is a push rod extending from the end of the first end arm toward the operating mechanism, and the corresponding position of the housing is provided with a second stroke hole where the pushing rod extends into the operating mechanism inside the housing, The lock catch of the operating mechanism is provided with a linkage hole that cooperates with the push rod in linkage.

Further, the tripping mechanism further includes a positioning pin, and the connecting end of the handle is movably connected to the handle through the positioning pin.

Further, the connecting end of the handle is a first stroke hole, and the size of the first stroke hole is larger than that of the positioning pin, so that when the handle drives the circuit breaker to close, the handle drives the positioning pin to move a space in the first stroke hole. journey.

Further, the locating pin includes a locating pin body and a limiting column extending from the locating pin body to one side; the locating pin body is inserted into the handle, and the limiting column is movably connected to the connecting end of the handle.

Further, the tripping mechanism further includes a fixing plate, the fixing plate is fixedly installed on the outer side of the housing of the circuit breaker, and the pivot connection end of the tripping rocker is pivotally connected to the fixing plate.

Further, the fixed plate is T-shaped, including a horizontal fixed rod and a vertical fixed rod vertically connected to the middle of the horizontal fixed rod, and the tripping rocker is rotatably mounted on the longitudinal fixed rod; the two ends of the horizontal fixed rod face The housing is extended with fixing protrusions that fit with the housing, and the side walls at both ends of the circuit breaker are respectively provided with installation grooves that fit with the fixing protrusions.

Further, the trip mechanism also includes a positioning pin and a fixed plate, the movable connection end is movably connected to the handle through the positioning pin; the fixed plate is fixedly installed on the outer side of the circuit breaker housing, and the The pivot connection end is pivotally connected to the fixing plate, the tripping rocker is located between the housing and the fixing plate, and the fixing plate is located below the tripping rocker.

Further, the operating mechanism includes a connecting rod, a support, a lock and a jumper, the support is rotatably installed in the housing, the energy storage spring is connected to the support, the lock and the jumper are respectively rotatably installed on the support and Buckle fit, the handle is connected with the jumper through the connecting rod, and the moving contact is connected with the support.

Further, or, the operating mechanism includes a rocker arm, a connecting rod, a support member, a lock and a jumper, the rocker arm and the support member are rotatably installed in the housing, and the rocker arm is limitedly connected to the support member through a rocker spring, and the storage The energy spring is connected with the supporting part, the lock and the jumper are respectively rotated and installed on the supporting part and are snap-fitted, the handle is connected with the jumper through the connecting rod, the moving contact is connected with the rocker arm, and the handle is provided in the housing with the rocker arm. Slip-fit stop arm.

In the embodiment of the present application, the circuit breaker tripping structure includes a circuit breaker and a tripping mechanism installed on the circuit breaker, and a tripping mechanism is added to the circuit breaker; when the circuit breaker is opened, the handle drives the handle connection end to drive the tripping The rocker rotates, and the free rotating end of the tripping rocker assists in pushing the operating mechanism to trip for the opening operation of the circuit breaker; through the additional tripping mechanism, the handle directly triggers the tripping of the operating mechanism when the circuit breaker is opened, and through the operating mechanism The internal energy storage spring enables the circuit breaker to realize rapid opening, prevents the circuit breaker from burning out, and improves the safety performance of the circuit breaker.

Description of drawings

Fig. 1 is a schematic structural diagram of the circuit breaker in the closing state of the circuit breaker tripping structure of the embodiment of the present application;

Fig. 2 is a structural schematic diagram of the circuit breaker in the opening process of the circuit breaker tripping structure of the embodiment of the present application;

Fig. 3 is a structural schematic diagram of the circuit breaker in the off state of the circuit breaker tripping structure of the embodiment of the present application;

Fig. 4 is a schematic structural view of the back of the circuit breaker of the tripping structure of the circuit breaker according to the embodiment of the present application;

Fig. 5 is a structural schematic diagram of the internal structure of the circuit breaker of the tripping structure of the circuit breaker according to the embodiment of the present application;

Fig. 6 is a schematic structural view of the side wall of the circuit breaker tripping structure of the embodiment of the present application;

Fig. 7 is an exploded view of the tripping mechanism of the tripping structure of the circuit breaker according to the embodiment of the present application;

Fig. 8 is an assembly diagram of the tripping mechanism of the tripping structure of the circuit breaker according to the embodiment of the present application;

Fig. 9 is a schematic structural diagram of the tripping rocker of the tripping structure of the circuit breaker according to the embodiment of the present application;

Fig. 10 is a structural schematic diagram of the fixing plate of the tripping structure of the circuit breaker according to the embodiment of the present application.

detailed description

The specific implementation of the circuit breaker tripping structure of the present application will be further described below with reference to the embodiments given in the accompanying drawings 1 to 10 . The circuit breaker tripping structure of the present application is not limited to the description of the following embodiments.

At present, the miniature circuit breaker can realize fast closing through the energy storage structure, but it cannot realize fast disconnection due to space constraints, that is, the breaking speed of the contact system when disconnecting the circuit is related to the speed of operating the disconnecting handle. Causes burnout of the circuit breaker contact system. In view of the above existing technical problems, the present application provides a circuit breaker tripping structure to solve the above technical problems.

As shown in Figures 1-5, the embodiment of the present application provides a tripping structure for a circuit breaker, including a circuit breaker A and a tripping mechanism B installed on the circuit breaker A; the circuit breaker includes a housing and is pivotally connected to the housing The handle 41 on the top, the handle 41 is connected with the operating mechanism, and the handle 41 drives the operating mechanism to perform the opening and closing operation of the circuit breaker; the tripping mechanism B includes a trip rocker 2, and the trip rocker 2 includes a pivot connection end, free rotation end and the handle connection end, the handle connection end is connected with the handle 41, the free rotation end is connected with the operating mechanism, and the trip rocker 2 rotates through the pivot connection end; when the circuit breaker is opened, the handle 41 drives the handle connection end to drive the trip rocker The lever 2 rotates, and the free rotation end of the tripping rocker 2 triggers the tripping of the operating mechanism to perform the opening operation of the circuit breaker.

In the embodiment of the present application, the circuit breaker tripping structure includes a circuit breaker and a tripping mechanism installed on the circuit breaker, and a tripping mechanism is added to the circuit breaker; when the circuit breaker is opened, the handle drives the handle connection end to drive the tripping The rocker rotates, and the free rotating end of the tripping rocker pushes the operating mechanism to trip to perform the opening operation of the circuit breaker; through the additional tripping mechanism, the handle directly triggers the tripping of the operating mechanism when the circuit breaker is opened. The unique energy storage spring enables the circuit breaker to realize rapid opening, prevents the circuit breaker from burning out, and improves the safety performance of the circuit breaker.

The operating mechanism of circuit breaker A includes a snap-fit lock 43 and a jumper. When the lock 43 is driven to release the snap fit with the jumper, the operating mechanism trips to drive the moving contact and the static contact to separate quickly. This is prior art in this field. The improvement of the present application is that through the additional tripping mechanism, the opening swing of the handle directly triggers the tripping of the operating mechanism through the tripping mechanism to realize quick tripping. In the following, two embodiments of the operating mechanism are used for description, and the operating mechanism of the present application is not limited to the following embodiments.

For example, an embodiment of an operating mechanism is that the operating mechanism includes a connecting rod, a support, a lock 43 and a jumper, the support is rotatably installed in the housing, an energy storage spring is connected with the support, the lock 43 and the jumper They are respectively rotated and installed on the support member and snap-fitted, the handle 41 is connected with the jumper through the connecting rod, and the moving contact is connected with the support member. When the switch is closed, the handle 41 drives the supporting part to rotate through the connecting rod and the jumper, and the energy storage spring is compressed to drive the moving contact to swing and contact the static contact; when the brake is opened, the handle 41 drives the supporting part to rotate through the connecting rod and the jumper. Drive the moving contact to swing and separate from the static contact; when the lock catch 43 is driven to release the hasp fit with the jumper, the operating mechanism trips, and the energy storage spring drives the support to rotate to drive the moving contact and the static contact to separate quickly.

For example, the embodiment of another operating mechanism is that the operating mechanism includes a rocker arm, a connecting rod, a support member, a lock catch 43 and a jumper, and the rocker arm and the support member are rotatably installed in the housing, and the rocker arm is connected with the rocker arm spring and The support member is limitedly connected, the energy storage spring is connected to the support member, the lock catch 43 and the jumper are respectively rotated and mounted on the support member and snapped together, the handle 41 is connected to the jumper through a connecting rod, and the moving contact is connected to the rocker arm. The handle 41 is provided with a limiting arm slidingly fitted with the rocker arm in the housing. When switching on, the handle 41 drives the supporting member through the connecting rod and jumper to rotate and compress the energy storage spring, while the limit arm of the handle 41 limits the rocker arm in the initial stage, and the rocker arm does not rotate to compress the gap between the rocker arm and the supporting member. The rocker arm spring, after the handle 41 swings to a certain position, the limit arm releases the limit on the rocker arm, and the rocker arm spring drives the rocker arm to rotate quickly, driving the moving contact to swing and contact the static contact to realize fast closing; When the gate is opened, the handle 41 drives the supporting part to rotate through the connecting rod and the jumper, driving the moving contact to swing and separate from the static contact; The spring drives the supporting member to rotate to drive the moving contact and the static contact to separate quickly.

It should be noted that the tripping mechanism of the embodiment of this application is not limited to use in circuit breakers, but can be assembled on one side of the product, and can be used as an accessory in specific occasions related to the operating speed of the product handle, for example, the dual power converter A product that is opened slowly by a motor. When the handle of the embodiment of the present application is rotated to the middle position, the contacts of the circuit breaker are not separated and the final pressure is not lost, the trip rocker drives the operating mechanism of the circuit breaker to unlock and trip to realize the rapid disconnection of the contacts.

As shown in Figure 1-5, the tripping mechanism B is located on the outer side of the circuit breaker housing; the tripping mechanism B also includes a positioning pin 1 and a fixing plate 3, and the connecting end of the handle is movably connected to the handle 41 through the positioning pin 1; The plate 3 is fixedly mounted on the outer side of the circuit breaker housing, and the pivotal connection end of the trip rocker 2 is pivotally connected to the fixed plate 3. The trip rocker 2 is located between the housing and the fixed plate 3, and the fixed plate 3 is located below the trip rocker 2. The connecting end of the handle is movably connected to the handle 41 through the positioning pin 1, and the pivotal connecting end of the tripping rocker 2 is pivotally connected to the fixed plate 3, and the tripping rocker 2 is stably installed on the circuit breaker through the positioning pin 1 and the fixed plate 3. On the device, the installation of the tripping rocker 2 is stable and reliable, and the overall structure of the tripping mechanism is simple and compact. It should be noted that the embodiment of this application does not limit the structure of the positioning pin 1, the tripping rocker 2, and the fixing plate 3 of the tripping mechanism B. When the tripping mechanism B is installed on other products, it can be adjusted according to the structure of other products. Features, improve the structure of positioning pin 1, tripping rocker 2, and fixing plate 3 to adapt to other products. For example, the fixing plate 3 is changed into a corresponding housing structure and the like. In addition, the tripping mechanism B in the embodiment of the present application can also be arranged inside the housing of the circuit breaker, but the internal structure of the circuit breaker needs to be improved, which is costly and complicated.

As shown in Figure 7-9, the specific structure of the trip rocker. The tripping rocker 2 includes a first end arm 21 and a second end arm 22; the pivotal connection end is arranged at the junction of the first end arm 21 and the second end arm 22, and the free rotation end is arranged at the end of the first end arm 21. The end, the handle connecting end is arranged at the end of the second end arm 22 . The first end arm 21 and the second end arm 22 of the trip rocker 2 form an obtuse angle with each other. The trip rocker 2 rotates through the pivot connection end, and triggers the operating mechanism of the circuit breaker through the free rotation end rotation, and through the handle connection end It is connected with the handle of the circuit breaker so as to be linked with the handle, thereby making it possible to accelerate the opening of the circuit breaker. The overall structure of the tripping rocker in the embodiment of the present application is simple and compact.

As shown in FIGS. 7 and 9 , the pivot connection end is a pivot shaft 23 extending toward the housing at the junction of the first end arm 21 and the second end arm 22 . Correspondingly, a pivot hole cooperating with the pivot shaft 23 should also be provided. The pivot hole can be a slot structure or a through hole structure, and the pivot hole can be provided on the housing of the circuit breaker, or on the fixing plate 3 .

As shown in FIGS. 1 , 7 and 9 , the handle connection end of the tripping rocker 2 is the first stroke hole 221 opened at the end of the second end arm 22 . The handle connection end wherein the first stroke hole 221 limits the travel of the handle connection end of the tripping rocker 2 . Preferably, the first stroke hole 221 is an oval hole or a square hole, and the specific shape of the first stroke hole 221 is not limited in this embodiment of the present application.

As shown in Figure 7-9, the freely rotating end of the tripping rocker 2 is a push rod 211 extending from the end of the first end arm 21 towards the operating mechanism, and the corresponding position of the housing is provided with a push rod 211 extending into the housing Inside the second stroke hole 42 of the operating mechanism, the lock 43 of the operating mechanism is provided with a linkage hole 431 that cooperates with the push rod 211 in linkage. Preferably, the second stroke hole 42 is an arc-shaped hole. When the tripping rocker 2 pivots, the movement trajectory of the push rod 211 of the first end arm 21 is an arc-shaped movement trajectory, and the movement trajectory of the lock catch 43 of the operating mechanism of the circuit breaker is also an arc-shaped movement trajectory, so , the second stroke hole 42 is set as an arc-shaped hole, and the second stroke hole 42 simultaneously limits the stroke of the push rod 211 . The push rod 211 and the pivot shaft 23 are respectively located on two sides of the trip rocker 2 .

When the trip rocker 2 is installed, the pivot shaft 23 is installed in the pivot hole 311 of the fixed plate 3; the limit post 12 extends into the first stroke hole 221 of the second end arm 22; the push rod of the first end arm 21 211 extends into the housing through the second stroke hole 42, and the push rod 211 is inserted into the linkage hole 431 on the lock 43 to realize the linkage between the push rod 211 and the operating mechanism.

As shown in FIGS. 7 and 8 , the sliding connection structure between the trip rocker 2 and the handle 41 in the embodiment of the present application is: the handle connection end of the trip rocker 2 is movably connected with the handle 41 through the positioning pin 1 . Preferably, the size of the first stroke hole 221 is larger than the size of the positioning pin 1, so that when the handle 41 drives the circuit breaker to switch on, the handle 41 drives the positioning pin 1 to move an empty stroke in the first stroke hole 221 and trip The rocker 2 rotates with the internal operating mechanism of the circuit breaker, and the push rod 211 rotates synchronously with the product operating mechanism, so that the internal operating mechanism of the circuit breaker does not trip and unlock during the closing process of the product, so that the circuit breaker can be closed smoothly; when the circuit breaker is opened, the handle 41 passes through The connecting end of the handle drives the trip rocker 2 to rotate, and the push rod 211 in the trip rocker 2 rotates accordingly, and the rotation speed is faster than the lock 43 of the internal operating mechanism of the circuit breaker. The buckle 43 is driven to release the hasp cooperation with the jumper, so that the circuit breaker is tripped, and then swings to the opening position with the handle 41. Specifically, preferably, the positioning pin 1 includes a positioning pin body 11 and a limiting column 12 extending from the positioning pin body 11 to one side; the positioning pin body 11 is inserted into the handle 41, and the limiting column 12 is movably connected to the connecting end of the handle. Wherein, the limit post 12 extends into the first travel hole 221 , and the first travel hole 221 limits the travel of the stop post 12 . During installation, the positioning pin body 11 is inserted into the corresponding groove of the handle 41, and the limit post 12 extends into the first stroke hole 221 to realize the sliding connection between the handle connection end of the tripping rocker 2 and the handle 41.

As shown in FIGS. 7 , 8 , and 10 , the fixed plate 3 is fixedly installed on the outer side of the circuit breaker housing, and the pivotal connection end of the trip rocker 2 is pivotally connected to the fixed plate 3 . The tripping rocker 2 is located between the housing of the circuit breaker and the fixing plate 3 .

Specifically, as shown in FIG. 10 , the specific structure of the fixing plate 3 . The fixed plate 3 is T-shaped and includes a horizontal fixed rod 32 and a vertical fixed rod 31 vertically connected to the middle of the horizontal fixed rod 32. In the pivot hole 311, the pivot shaft 23 is installed in the pivot hole 311 of the fixing plate 3, so as to realize the pivot installation of the tripping rocker 2. The embodiment of the present application does not limit the shape, size, etc. of the fixing plate 3 , and the shape, size, etc. of the fixing plate 3 can be adjusted according to actual conditions.

As shown in Figures 6 and 10, the two ends of the transverse fixing rod 32 are extended toward the housing to be provided with fixing protrusions 321 which are installed and matched with the housing, and the side walls at both ends of the circuit breaker are respectively provided with fixing protrusions 321 which are installed and matched with the housing. The slot 421 is installed. During installation, the pivot shaft 23 is installed in the pivot hole 311 of the fixed plate 3 to realize the pivotal installation of the tripping rocker 2, and the fixed protrusions 321 at both ends of the transverse fixed rod 32 face one side of the circuit breaker housing, Press down the horizontal fixing rod 32, and press the fixing protrusions 321 at both ends of the horizontal fixing rod 32 into the mounting grooves 421 of the side walls at both ends of the circuit breaker.

The process of accelerating the opening of the circuit breaker by the circuit breaker tripping structure of the present application is illustrated below in conjunction with accompanying drawings 1-3:

As shown in Figure 1, the circuit breaker is in the closing state. The handle faces to the left.

As shown in Figure 2, when the brake needs to be opened, the handle 41 is moved to the right, the handle 41 drives the first stroke hole 221 to drive the trip rocker 2 to rotate, and the push rod 211 of the trip rocker 2 drives the operating mechanism of the circuit breaker action. When the handle is turned to the middle position, the circuit breaker contacts are not separated and the final pressure is not lost, the trip rocker drives the circuit breaker operating mechanism to trip to realize the quick disconnection of the contacts.

As shown in Figure 3, the circuit breaker is in an open state. The handle faces to the right.

The following describes the whole process of assembling the tripping structure of the circuit breaker on one side of the circuit breaker in conjunction with accompanying drawings 1-10:

Firstly, the positioning pin body 11 is inserted into the corresponding groove of the handle 41 , and the limit post 12 extends into the first stroke hole 221 to realize the sliding connection between the handle connection end of the tripping rocker 2 and the handle 41 .

Next, when the tripping rocker 2 is installed, the limit post 12 extends into the first stroke hole 221 of the second end arm 22; the push rod 211 of the first end arm 21 passes through the second stroke hole 42 and extends into the inside of the housing , the push rod 211 is inserted into the linkage hole 431 on the latch 43 to realize the linkage between the push rod 211 and the operating mechanism.

Finally, the fixing plate 3 is installed on the housing, the pivot shaft 23 is installed in the pivot hole 311 of the fixing plate 3, and the fixing protrusions 321 at both ends of the transverse fixing rod 32 face one side of the circuit breaker housing, and press down the transverse direction. The fixing rod 32 presses the fixing protrusions 321 at both ends of the horizontal fixing rod 32 into the mounting grooves 421 of the side walls at both ends of the circuit breaker.

The embodiment of the present application provides extra driving force for the operating mechanism of the circuit breaker through the additional tripping mechanism when the circuit breaker is opened, so that the circuit breaker can realize rapid opening, prevent the circuit breaker from burning out, and improve the safety performance of the circuit breaker.

The above content is a further detailed description of the present application in conjunction with specific preferred implementation modes, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, some simple deduction or substitutions can be made without departing from the concept of this application, which should be deemed to belong to the protection scope of this application.

Claims (12)

1. A circuit breaker tripping structure comprises a circuit breaker (A), wherein the circuit breaker (A) comprises a shell and a handle (41) which is pivotally connected to the top of the shell, the handle (41) is connected with an operating mechanism, and the handle (41) drives the operating mechanism to perform opening and closing operations of the circuit breaker;

the method is characterized in that: the tripping device also comprises a tripping mechanism (B) arranged on the circuit breaker (A); the tripping mechanism (B) comprises a tripping rocker (2), the tripping rocker (2) comprises a pivoting connection end, a free rotation end and a handle connection end, the handle connection end is connected with a handle (41), the free rotation end is connected with the operating mechanism, and the tripping rocker (2) rotates through the pivoting connection end;

when the breaker is opened, the handle (41) drives the handle connecting end to drive the tripping rocker (2) to rotate, and the free rotating end of the tripping rocker (2) triggers the operating mechanism to trip to perform the opening operation of the breaker.

2. The circuit breaker trip structure of claim 1, wherein: the tripping mechanism (B) is positioned on one side of the outer part of the shell of the circuit breaker.

3. The circuit breaker trip structure of claim 1, wherein: the operating mechanism of the circuit breaker (A) comprises a hasp (43) and a jump buckle which are in hasp fit, and when the hasp (43) is driven to be released from hasp fit with the jump buckle, the operating mechanism is tripped to drive the moving contact to be separated from the static contact.

4. The circuit breaker trip structure of claim 1, wherein: the trip rocker (2) comprises a first end arm (21) and a second end arm (22);

the pivot joint end is arranged at the joint of the first end arm (21) and the second end arm (22), the free rotation end is arranged at the end part of the first end arm (21), and the handle joint end is arranged at the end part of the second end arm (22).

5. The circuit breaker trip structure of claim 4, wherein: the handle connecting end is a first stroke hole (221) formed in the end part of the second end arm (22).

6. The circuit breaker trip structure of claim 4, wherein: the free rotation end is catch (211) that the tip of first end arm (21) extends the setting towards operating device, the relevant position of casing is equipped with catch (211) and stretches into inside operating device's of casing second stroke hole (42), operating device's hasp (43) are equipped with linkage hole (431) with catch (211) linkage complex.

7. The circuit breaker trip structure of claim 1, wherein: the tripping mechanism (B) further comprises a positioning pin (1), and the handle connecting end is movably connected with the handle (41) through the positioning pin (1).

8. The circuit breaker trip structure of claim 7, wherein: the handle connecting end is a first stroke hole (221), the size of the first stroke hole (221) is larger than that of the positioning pin (1), and when the handle (41) drives the breaker to be switched on, the handle (41) drives the positioning pin (1) to move for an idle stroke in the first stroke hole (221).

9. The circuit breaker trip structure of claim 7, wherein: the positioning pin (1) comprises a positioning pin body (11) and a limiting column (12) extending towards one side of the positioning pin body (11); the locating pin body (11) is connected with the handle (41) in an inserting mode, and the limiting column (12) is movably connected with the connecting end of the handle.

10. The circuit breaker trip structure of claim 2, wherein: the tripping mechanism (B) further comprises a fixing plate (3), the fixing plate (3) is fixedly installed on one side of the outer portion of the shell of the circuit breaker, and the pivoting connection end of the tripping rocker (2) is in pivoting connection with the fixing plate (3).

11. The circuit breaker trip structure of claim 10, wherein: the fixing plate (3) is T-shaped and comprises a transverse fixing rod (32) and a longitudinal fixing rod (31) vertically connected to the middle of the transverse fixing rod (32), and the tripping rocker (2) is rotatably arranged on the longitudinal fixing rod (31); the both ends of horizontal dead lever (32) extend towards the casing and are equipped with casing installation complex fixed protrusion (321), the both ends lateral wall of circuit breaker is equipped with respectively and installs complex mounting groove (421) with fixed protrusion (321).

12. The circuit breaker trip structure of claim 1, wherein: the operating mechanism comprises a connecting rod, a supporting piece, a lock catch (43) and a jump buckle, the supporting piece is rotatably arranged in the shell, the energy storage spring is connected with the supporting piece, the lock catch (43) and the jump buckle are respectively rotatably arranged on the supporting piece and are in hasp fit, the handle (41) is connected with the jump buckle through the connecting rod, and the moving contact is connected with the supporting piece;

or, the operating mechanism comprises a rocker arm, a connecting rod, a supporting piece, a lock catch (43) and a jump buckle, the rocker arm and the supporting piece are rotatably installed in the shell, the rocker arm is in limit connection with the supporting piece through a rocker arm spring, an energy storage spring is connected with the supporting piece, the lock catch (43) and the jump buckle are respectively rotatably installed on the supporting piece and in hasp fit, a handle (41) is connected with the jump buckle through the connecting rod, a moving contact is connected with the rocker arm, and the handle (41) is provided with a limit arm in sliding fit with the rocker arm in the shell.

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