CN114005710A

CN114005710A - Electric leakage fault indication mechanism of circuit breaker and circuit breaker

Info

Publication number: CN114005710A
Application number: CN202010736241.8A
Authority: CN
Inventors: 张业; 安德雷斯·蒙特
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2022-02-01
Also published as: WO2022023354A1; EP4173019A1

Abstract

The invention provides a leakage fault indicating mechanism of a circuit breaker, which comprises an indicating piece and a driving component for leakage fault protection. The indicating piece is rotatably connected to the shell, and a first reset elastic element is connected between the indicating piece and the shell. The drive assembly is arranged in the shell, and can be switched to a closed locking state under the drive of the handle. When an electric leakage fault occurs, the push rod of the electric leakage fault release unlocks the driving assembly, so that the action connecting rod disconnects the circuit breaker under the driving of the driving assembly, and the indicating piece rotates and indicates the electric leakage fault under the driving of the first reset elastic element. The leakage fault indicating mechanism is completely independent of the switching function of the circuit breaker, can be used as an independent unit of the circuit breaker, and has good independence and high reliability. The invention also provides a circuit breaker with the electric leakage fault indicating mechanism.

Description

Electric leakage fault indication mechanism of circuit breaker and circuit breaker

Technical Field

The invention relates to the field of low-voltage electricity, in particular to a leakage fault indicating mechanism of a circuit breaker and the circuit breaker.

Background

The residual current circuit breaker (RCBO) product not only has the overload and short circuit protection functions of a common miniature circuit breaker, but also has the residual current protection function aiming at the life safety of people. However, for the existing residual current circuit breaker product, whatever fault occurs can cause the circuit breaker product to trip and trip. If a customer cannot distinguish the specific fault type causing tripping according to the appearance of the residual current circuit breaker, potential safety hazards exist. In particular, when a life safety threatening electrical leakage fault occurs, there is a potential life safety hazard if the switch is closed by trade. Therefore, a set of leakage fault indicating mechanism is required to be arranged on the product to indicate the fault type. However, most of the existing leakage fault indication mechanisms are complex, and great inconvenience is brought to production and assembly.

Disclosure of Invention

The invention aims to provide an electric leakage fault indicating mechanism of a circuit breaker, which can indicate when an electric leakage fault occurs, has a simple structure and is convenient to produce and assemble.

Another object of the present invention is to provide a circuit breaker having the above leakage fault indicating mechanism, which can not only indicate whether a leakage fault occurs to a user, but also has a simple structure and is easy to produce and assemble.

The invention provides an electric leakage fault indicating mechanism of a circuit breaker. The shell comprises an electric leakage fault release and an action connecting rod. The leakage fault indicating mechanism of the circuit breaker comprises an indicating piece and a driving assembly for leakage fault protection. The indicating piece is rotatably connected to the shell, and a first reset elastic element is connected between the indicating piece and the shell. The driving assembly is arranged in the shell, and can be switched to a closed locking state under the driving of the handle. When an electric leakage fault occurs, the push rod of the electric leakage fault release unlocks the driving assembly, so that the action connecting rod disconnects the circuit breaker under the driving of the driving assembly, and the indicating piece rotates and indicates the electric leakage fault under the driving of the first reset elastic element. The leakage fault indicating mechanism is completely independent of the switching function of the circuit breaker, does not act due to the normal action or overload and short-circuit protection action of the circuit breaker, has better independence, can ensure that false action does not occur and error fault information is transmitted to a user, and has higher reliability and safety. In addition, the leakage fault indicating mechanism is completely independent of the switching function of the circuit breaker, so that the leakage fault indicating mechanism can be an independent unit of the circuit breaker, and a user can determine whether to select and match the circuit breaker, thereby achieving the purpose of reducing the cost.

In another exemplary embodiment of the electrical leakage fault indicating mechanism of the circuit breaker, the indicator includes an indicator body and a connecting portion. The indicator body is provided with an indication area. The connecting part extends along the axial direction of the indicator body and is used for connecting the handle. Under the drive of the handle, the connecting part can rotate from a first initial position to a first locking position, and under the action of the first resetting elastic element, the connecting part can return from the first locking position to the first initial position.

In still another exemplary embodiment of the electrical leakage fault indicating mechanism of the circuit breaker, when an electrical leakage fault occurs, the connecting portion returns to the first initial position, and the indicating area is at least partially exposed outside the housing.

In still another exemplary embodiment of the electrical leakage fault indicating mechanism of the circuit breaker, the handle is provided with an accommodating groove. The connecting part extends into the containing groove and can slide in the containing groove.

In another exemplary embodiment of the electrical leakage fault indicating mechanism of the circuit breaker, one inner wall of the accommodating groove is a driving surface, and the driving surface can push the connecting portion to rotate.

In still another exemplary embodiment of the electrical leakage fault indicating mechanism of the circuit breaker, the electrical leakage fault indicating mechanism further comprises a mounting housing, and the indicating piece and the handle are assembled on the mounting housing and bridged on two sides of the mounting housing, so that the electrical leakage fault indicating mechanism can be conveniently assembled.

In yet another exemplary embodiment of the electrical leakage fault indication mechanism of the circuit breaker, the drive assembly includes a trip bar, a drive rod, a latch rod, an energy storage rod, and a coupling rod. The jump buckle comprises a jump buckle body and a jump buckle arm. The two ends of the driving rod are respectively and rotatably connected with the indicating piece and the jump buckle body. The lock catch rod is pivoted to the shell. And a second reset elastic element is connected between the energy storage rod and the shell. The two ends of the coupling rod are respectively and rotatably connected with the jump buckle body and the energy storage rod. The driving assembly has high reliability.

In another exemplary embodiment of the electrical leakage fault indicating mechanism of the circuit breaker, a third restoring elastic element is connected between the latch lever and the housing.

In another exemplary embodiment of the electrical leakage fault indicating mechanism of the circuit breaker, the trip catch is moved from the second initial position to the second locking position by the driving of the indicator, and drives the energy storage rod to compress the second reset elastic element.

In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the latch lever may lock the trip buckle, and the energy storage lever may drive the trip buckle to rotate after the push rod pushes the latch lever to disengage from the trip buckle.

In yet another exemplary embodiment of the electrical leakage fault indication mechanism of the circuit breaker, the trip body has a boss. The actuating link includes an actuating arm having a flange. After the lock catch rod is separated from the jump buckle, the energy storage rod drives the jump buckle to rotate, the boss can act on the flange and drive the action connecting rod to move, so that the electric leakage fault indicating mechanism can not only indicate an electric leakage fault, but also unlock an operating mechanism of the circuit breaker, and safety is improved.

In yet another exemplary embodiment of the electrical leakage fault indication mechanism of the circuit breaker, the trip arm has an avoidance slot. When the driving assembly is in a closed locking state, when the action connecting rod acts, the flange can pass through the avoiding groove to ensure that the electric leakage fault indicating mechanism is independent of an operating mechanism of the circuit breaker when the circuit breaker is in overload and short-circuit protection actions.

In another exemplary embodiment of the leakage fault indicating mechanism of the circuit breaker, the actuating link further includes a linkage arm, the actuating arm and the linkage arm are respectively located in different chambers of the module, and the linkage arm can unlock the operating mechanism of the circuit breaker.

In another exemplary embodiment of the electrical leakage fault indication mechanism of the circuit breaker, the housing further includes a linkage for connecting another module of the circuit breaker, and the linkage is connected to the action link and can be driven by the action link to rotate.

The invention provides a circuit breaker, which comprises an electric leakage fault indicating mechanism of the circuit breaker. The leakage fault indicating mechanism is completely independent of the switching function of the circuit breaker, does not act due to the normal action or overload and short-circuit protection action of the circuit breaker, has better independence, can ensure that false action does not occur and error fault information is transmitted to a user, and has higher reliability and safety. In addition, the circuit breaker is completely independent of the switching function of the circuit breaker, so that the circuit breaker is convenient to generate and assemble.

Drawings

The foregoing and other features and advantages of the invention will become more apparent to those skilled in the art to which the invention relates upon consideration of the following detailed description of a preferred embodiment of the invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of a circuit breaker having an electrical leakage fault indicating mechanism according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an electrical leakage fault indicating mechanism according to an embodiment of the present invention;

FIG. 3 is an exploded view of the electrical leakage fault indicating mechanism of FIG. 2;

FIG. 4 is an exploded view of a portion of the electrical leakage fault indicating mechanism of FIG. 2;

FIG. 5 is a partial enlarged view of the area M of FIG. 2;

FIG. 6 is a schematic structural diagram of the jump buckle in FIG. 2;

FIG. 7 is a schematic view of the action link of FIG. 2;

fig. 8 and 9 are used to explain a closing process of the circuit breaker;

fig. 10 is a schematic structural view of the leakage fault indicating mechanism when the circuit breaker is normally opened according to the present invention;

fig. 11 is a schematic structural view of an electric leakage fault indicating mechanism when the circuit breaker is opened due to overload and short-circuit faults according to the present invention;

fig. 12 is a schematic structural view of the leakage fault indicating mechanism when the circuit breaker unlocks the driving assembly due to the leakage fault according to the present invention;

fig. 13 is a schematic diagram of the structure of the L pole of the circuit breaker of fig. 1;

FIG. 14 is an exploded view of the L pole of FIG. 13;

FIG. 15 is a schematic view of the handle of FIG. 13;

FIG. 16 is a schematic illustration of the arcuate linkage of FIG. 13;

FIG. 17 is a schematic view of the common release member of FIG. 13;

fig. 18 is a schematic structural diagram of an L pole when the circuit breaker is switched on;

fig. 19 is a schematic structural view of the L-pole in fig. 13 when the circuit breaker protection function operates to unlock the L-pole.

Wherein the reference numbers are as follows:

100 shell 310 push rod

110 mounting housing 400 indicator

111 locating pin 410 indicator body

112 guide slot 411 indication area

113 support member 420 connecting part

200 handle 430 first return elastic element

210 handle body 500 drive assembly

211 accommodation groove 510 jump buckle

2111 drive face 511 jump buckle arm

220 fourth reset elastic element 5111 avoidance groove

512 jump buckle body of 300 leakage fault release

5121 second bending part of boss 723

520 drive rod 724 second connection end

530 locking lever 730 locking lever

531 moving contact assembly of third reset elastic element 740

540 energy storage rod 741 pressure spring

541 second reset elastic element 750 coupling rod

550 coupling rod 760 handle

610 action link 761 handle hole

611 driving arm 762 reset spring installation cavity

6111 limit guide part 763 reset spring

6112 flange 764 stopper

612 linkage arm 800 static contact component

620 linkage 900 shared fastening-releasing piece

710 jump buckle 910 fastening piece connecting groove

720 bow-shaped connecting rod 920 fastening-releasing driving arm

721 first end 921 fastener impact boss

722 first bending part 930 connecting pin for releasing fastener

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, for simplicity and clarity of understanding, only one of the components having the same structure or function is schematically illustrated or labeled in some of the drawings.

In this document, "one" means not only "only one" but also a case of "more than one". In this document, "first", "second", etc. do not mean their importance or order, etc., but merely mean that they are distinguished from each other so as to facilitate the description of the document. Herein, "modulus" is used to denote the width of the circuit breaker. Typically, one modulus is 18 mm.

Referring to fig. 1, a schematic structural diagram of an exemplary embodiment of a circuit breaker with an electrical leakage fault indication mechanism according to the present invention is shown. The circuit breaker 10 comprises two

modules

11, 12. Wherein, the first chamber of the first module 11 is provided with an electric leakage fault indication mechanism, and the second chamber is provided with an operating mechanism. The user can analyze whether the electrical leakage fault has occurred through the indicator 400 of his electrical leakage fault indicating mechanism. The number of modules of the circuit breaker of the invention can also be greater than two. The operating mechanism of the circuit breaker comprises a contact assembly and an actuating assembly. The operating mechanism can control the contact and the separation of the contact so as to realize the disconnection and the connection of the current loop. The first module 11 and the second module 12 shown in fig. 1 are each one module wide.

Referring to fig. 2, a schematic structural diagram of an embodiment of the leakage fault indication mechanism in the first module 11 of fig. 1 is shown. The first module 11 includes a housing 100, a handle 200, an electrical leakage fault indicating mechanism including an indicator 400 and a drive assembly 500 for electrical leakage fault protection, an electrical leakage fault release 300, and an actuating link 610.

The handle 200 and the indicator 400 are rotatably connected to the housing 100, respectively. The earth leakage fault release 300, the action link 610 and the driving assembly 500 are disposed in the housing 100. A first restoring elastic member 430 is further connected between the indicator 400 and the housing 100.

When the user manually closes the first module 11, the driving assembly 500 can be switched to the closed locking state by the driving of the handle 200. When an electric leakage fault occurs, the push rod 310 of the electric leakage fault release 300 unlocks the driving assembly 500, so that the action connecting rod 610 disconnects the circuit breaker and the handle 200 resets under the driving of the driving assembly 500; the indicator 400 rotates and indicates an electrical leakage fault by the driving of the first restoring elastic member 430. The first return elastic member 430 may be a spring.

The leakage failure indication mechanism of the present embodiment is completely independent of the switching function of the circuit breaker. Specifically, the electrical leakage fault indication mechanism is initially closed with the handle 200 closed; then, the handle does not act along with the normal opening and closing operation of the handle 200, and does not act along with the tripping action of the overload and overcurrent protection function of the circuit breaker; only when an electric leakage fault which endangers personal safety occurs, the driving assembly 500 of the electric leakage fault indicating mechanism is unlocked by the push rod 310 of the electric leakage fault release, and the indicating piece 400 is always kept in a fault indicating state until a user clearly closes the breaker handle manually again after the fault is cleared, so that the fault display is not cancelled.

In an alternative embodiment, the housing 100 further includes a linkage 620 for connecting another module of the circuit breaker, and the linkage 620 is connected to the action link 610 and can be rotated by the action link 610.

Referring to fig. 3, an exploded view of the leakage fault indication mechanism of fig. 2 is shown. The drive assembly 500 includes a jumper 510, a drive rod 520, a latch lever 530, an energy storage lever 540, and a coupling lever 550.

Referring to fig. 5, a partial enlarged view of the region M of fig. 2 is shown. The jumper 510 includes a jumper body 512 and a jumper arm 511 (see fig. 6). Both ends of the driving lever 520 are rotatably connected to the indicating member 400 and the jump buckle body 512, respectively. Wherein, one end of the driving rod 520 extends into the guiding groove 112; the jump buckle body 512 can move along the guide groove 112 by the driving rod 520. The latch lever 530 is pivotally connected to the housing 100, and one end thereof can abut against and lock the trip arm 511. A third restoring spring 531 may be connected between the latch lever 530 and the housing 100. A second elastic return element 541 is connected between the energy storage rod 540 and the housing 100. The coupling rod 550 is rotatably connected to the jump buckle body 512 and the energy storage rod 540 at two ends. When the jumper body 512 moves to the second locking position along the guide groove 112, the energy storage rod 540 can compress the second elastic return element 541 for storing energy. The second and third return

elastic elements

541 and 531 may be springs.

Referring to fig. 4, a partial exploded view of the electrical leakage fault indication mechanism of fig. 2 is shown. The indicator 400 includes an indicator body 410 and a connecting portion 420. The indicator body 410 is provided with an indication area 411. The connecting portion 420 extends in the axial direction of the indicator body 410, and is used to connect the handle 200. Specifically, the connecting portion 420 can be rotated from the first initial position to the first locking position by the driving of the handle 200. The connection part 420 in fig. 4 is located at a first initial position. When an electrical leakage fault occurs, under the action of the first elastic resetting element 430, the connecting portion 420 can return to the first initial position from the first locking position, and the indication area 411 is at least partially exposed out of the housing 100, for example, the indication area 411 shown in fig. 4 is completely exposed out of the housing 100. The indication area 411 may be a special color, a special mark, or a transparent material.

In an alternative embodiment, the body of the handle 200 is provided with a receiving groove 211. The connection portion 420 can extend into the receiving groove 211 and can slide in the receiving groove 211. Referring to fig. 4, one side inner wall of the receiving groove 211 is set as a driving surface 2111, and the handle 200 pushes the connection portion 420 to rotate through the driving surface 2111. Specifically, the body of the handle 200 may have a half module width, and the receiving groove 211 may have a circular ring shape.

In an alternative embodiment, the first module 11 further includes a mounting housing 110. As shown in fig. 4, the indicator 400 and the handle 200 may be respectively fitted to two positioning pins 111 of the mounting case 110 and cross both sides of the mounting case 110. After assembly, the connection part 420 passes through the arc-shaped groove of the mounting case 110 and extends into the receiving groove 211.

Referring to fig. 6, a schematic diagram of the jump buckle in fig. 2 is shown. The jumper 510 includes a jumper body 512 and a jumper arm 511. Referring to fig. 7, a schematic diagram of the action link of fig. 2 is shown. When a leakage fault occurs, the trip catch 510 can collide with the action link 610, and the trip catch 510 drives the action link 610 to move. When a user manually closes the circuit breaker or the circuit breaker is tripped due to overload or overcurrent protection, the trip bar 510 and the latch bar 530 can be avoided when the actuating link 610 moves.

In an alternative embodiment, the jump buckle body 512 has a boss 5121 thereon. The actuating link 610 includes a drive arm 611, the drive arm 611 having a flange 6112. After the locking rod 530 is separated from the jump buckle 510, when the energy storage rod 540 drives the jump buckle 510 to rotate, the boss 5121 can act on the flange 6112 and drive the action link 610 to move. This embodiment can ensure that electric leakage fault indication mechanism not only can instruct the electric leakage fault, can unblock circuit breaker's operating device simultaneously to improve the security.

In an alternative embodiment, the jump buckle arm 510 is further provided with an escape groove 5111. When the actuating link 610 is actuated while the drive assembly 500 is in the closed and locked state, the flange 6112 of the drive arm 611 can pass through the escape groove 5111.

The action link 610 may also include a linkage arm 612. The driving arm 611 and the linkage arm 612 are respectively located in different chambers of the module, and the linkage arm 612 can unlock the operating mechanism of the chamber in which the linkage arm is located to open the circuit breaker. The operation link 610 can realize a cooperative operation when a breaker failure or an earth leakage failure occurs.

The closing process of the circuit breaker will now be described with reference to fig. 8 and 9. In fig. 8, the handle 200 and the indicator 400 are both in the initial state; the connecting part 420 of the indicator 400 is located at a first initial position, and the indicating area 411 is exposed out of the housing 100; the jump buckle 510 is located at a second initial position. In fig. 9, the handle 200 is in a closed state. The connecting portion 420 of the indicator 400 is located at the first locking position, the indicating area 411 is hidden inside the casing 100, and the jumper 510 is located at the second locking position.

When the user manually closes the handle 200 of the circuit breaker, the receiving groove 211 of the handle 200 pushes the connection part 430 of the indicator 400 to rotate, thereby causing the leakage fault indicating mechanism of the present invention to perform a closing operation. The jump ring 510 moves along the guide groove 112 by the driving lever 520. The energy storage rod 540 is driven by the coupling rod 550 to compress the second elastic return element 541 by using the contact surface of the support 113 as a supporting point to store energy. When the connecting part 420 rotates to the first locking position, the indication area 411 is hidden inside the circuit breaker, i.e. a non-leakage fault state is displayed to a user; the jump buckle 510 moves to the second locked position, and the jump buckle arm 511 of the jump buckle 510 abuts against the latch lever 530. At this time, the driving assembly 500 is in a closed and locked state.

Referring to fig. 10, a schematic structural diagram of the leakage fault indicating mechanism when the circuit breaker is normally opened is shown. In fig. 10, the handle 200 is returned to the initial state, the indicator 400 remains closed, and the connecting portion 420 remains at the first locking position.

The normal opening process of the circuit breaker will now be described with reference to fig. 9 and 10. When the circuit breaker is normally used for opening and closing operations, the states of the driving assembly 500 and the actuating link 610 are not changed, and the handle 200 is rotated and returns to the initial state from the closed state. Because the accommodation groove 211 of the handle 200 has enough space, the opening and closing operation has no influence on the leakage fault indicating mechanism. The indicator 400 is not rotated by the rotation of the handle 200, and the indication region 411 of the indicator 400 is still hidden inside the housing 100.

Referring to fig. 11, a schematic structural diagram of the leakage fault indicating mechanism when the circuit breaker is opened due to overload and short-circuit fault according to the present invention is shown. In fig. 11, the handle 200 is returned to the initial state, the indicator 400 remains closed, and the connecting portion 420 remains at the first locking position.

The process of opening the circuit breaker due to overload, short-circuit fault will now be described with reference to fig. 9 and 11. When the circuit breaker is opened due to overload or short-circuit failure, the position of the actuating link 610 changes, and the end of the actuating arm 611 moves downward in the direction of the guide groove 112. Since the jump buckle arm 511 is provided with the escape groove 5111, the flange 6112 of the driving arm 611 can pass through the escape groove 5111. The limit guide portion 6111 of the driving arm 611 can smoothly pass through the lower side thereof while avoiding the jump hook arm 511 and the hook lever 530. Therefore, the movement from the action link 610 does not interfere with the electrical leakage failure indicating mechanism of the present invention, and the electrical leakage failure indicating mechanism is maintained in the close-lock state. This can ensure that the electrical leakage fault indication mechanism is independent of the circuit breaker operating mechanism.

Referring to fig. 12, a schematic structural diagram of the leakage fault indicating mechanism when the circuit breaker unlocks the driving assembly due to the leakage fault is shown. The process of opening the circuit breaker due to an earth leakage fault will now be described with reference to fig. 9, 12, and 8. When the circuit breaker is operated to be opened due to the leakage fault, the push rod 310 of the leakage fault release 300 is released to eject. After the push rod 310 pushes the latch lever 530 to rotate, the jump latch arm 511 is disengaged from the latch lever 530. Thus, the jump buckle 510 is unlocked. Under the action of the second return elastic element 541, the energy storage rod 540 and the coupling rod 550 move rapidly. At this time, the indicator 400 has not yet rotated, and the jumper 510 rapidly rotates around one end of the driving rod 520. In the moving process, the boss 5121 of the jumper body 512 collides with the flange 6112 of the action link 610, so that the action link 610 is linked, the operating mechanism of the circuit breaker is further unlocked, and the whole circuit breaker is disconnected. The whole movement process is shown in fig. 9, fig. 12 and fig. 8 in sequence. The handle 200 and the indicator 400 are rotated to return to the initial state by the fourth restoring elastic element 220 and the first restoring elastic element 430, respectively. At this time, indication region 411 hidden inside case 100 is exposed from case 100 to inform the user of the occurrence of the electrical leakage failure. After the user closes the handle 200 again after removing the fault, the electrical leakage fault indicating mechanism is switched from the state shown in fig. 8 to the state shown in fig. 9. The fourth restoring elastic member 220 may be a spring.

Therefore, when the breaker handle 200 is closed, the electric leakage fault indicating mechanism can be driven to reset and switch on, and then the handle 200 is separated from the electric leakage fault indicating mechanism to ensure the stability of the fault indicating mechanism; when the leakage fault occurs, the driving assembly 500 will actively collide with the action link 610 to act, and then release the whole product to be disconnected. Achieving the cooperative action with the existing mechanism of the circuit breaker.

The invention also provides a circuit breaker, which comprises the electric leakage fault indication mechanism in any one of the above embodiments. The circuit breaker has high reliability and safety.

Generally, a multi-pole standard size residual current circuit breaker is designed based on the layout of a compact 1PN product.

A compact 1PN circuit breaker product, which generally has an L-pole operating mechanism and an N-pole operating mechanism, adopts an L/N integrated type or an L/N split type. No matter which mode is adopted, the operation is driven by the same handle and the connecting rod, so that the L pole and the N pole are synchronously opened and closed, and the connecting rod and main mechanism parts are not assembled on the same side of a product.

In a multi-pole circuit breaker product, only the L-pole operating mechanism is required for any one pole. Therefore, it is necessary to optimize the existing operating mechanism based on the compact 1PN circuit breaker product, and save space as much as possible, so as to achieve the purpose of satisfying product performance, integrating various electronic control functions, and improving assembly efficiency.

In the aspect of concrete implementation, the existing design adopts the following two modes that (1) in a compact space (about 1.5 modules), the same handle and a connecting rod drive an operating mechanism of the circuit breaker to control the opening and closing of two L poles, and one set of mechanism of the mode still controls the opening and closing of two contacts, so that the flexibility is insufficient; (2) the single-pole operating mechanism controls the single-pole contact to be opened and closed, the whole size of the arc extinguishing system is reduced by half to place a leakage functional assembly, and the breaking performance of a product can be sacrificed in the mode. In addition to the above two modes, the present invention also provides a new design scheme, which will be described with reference to fig. 13 to 19.

Referring to fig. 13, a schematic diagram of one embodiment of the L pole of the circuit breaker of fig. 1 is shown. Specifically, the L poles of the first module 11 and the second module 12 may both adopt such a structure.

In this embodiment, the L-pole operating mechanism employs an arcuate linkage 720. The operating mechanism can realize the contact and disconnection of the movable contact component and the fixed contact component, and the connection with an external accessory can realize switch control or signal transmission. The device has the advantages of small occupied space (half modulus), low cost and convenient assembly.

Referring to fig. 14, an exploded view of the L pole of fig. 13 is shown. The second module 12 includes a housing, a handle 760, an arcuate link 720, a jumper 710, a coupling bar 750, a latch 730, a common release 900, contact assemblies 740, and stationary contact assemblies 800.

The handle 760 and the common release member 900 are rotatably connected to the housing, respectively. The bow-shaped link 720, the jumper 710, the latch 730, the movable contact assembly 740 and the coupling rod 750 are disposed in the housing. The latch lever 730 is pivotally connected to the housing. A return spring 763 is connected between the handle 760 and the housing, and the handle 760 has a width of half module (the entire module width can be used as required by the design). A pressure spring 741 is connected between the movable contact assembly 740 and the housing.

Referring to fig. 15, a schematic view of the handle of fig. 13 is shown. The handle 760 has a handle hole 761, a return spring mounting cavity 762, and a stopper 764. Handle hole 761 is used to connect one end of arcuate link 720. The return spring mounting cavity 762 is used to mount a return spring 763. The stopper 764 restricts rotation of the return spring 763.

Referring to fig. 16, a schematic diagram of the arcuate linkage of fig. 13 is shown. The bow link 720 includes a first connection end 721, a first bent portion 722, a second bent portion 723, and a second connection end 724. The first connecting end 721 is connected to the handle 760, and the second connecting end 724 is connected to the jump ring 710. A bending angle is formed between the first bending portion 722 and the second bending portion 723. Referring to fig. 19, a bent angle is formed on the arched link 720 such that the arched link 720 avoids the coupling bar 750 during the movement. In addition, a plurality of bending angles may be provided between the first connection end 721 and the second connection end 724 as necessary. By providing multiple bend angles, it is further ensured that arcuate link 720 avoids coupling bar 750 during movement.

Referring to fig. 17, a schematic diagram of the common release member of fig. 13 is shown. The common release member 900 includes a common release member main body and a release member driving arm 920. Wherein, both ends of the common release element main body are respectively provided with a release element connecting groove 910 and a release element connecting pin 930; the end of the release driving arm 920 is provided with a release collision boss 921. The common release 900 enables release control of adjacent poles during multi-pole splicing (or splicing with external accessories).

When the multi-stage product is automatically disconnected due to the protection function operation, the common release 900 is needed. The release member coupling pin 930 of the common release member 900 is coupled with the release member coupling groove of another common release member. During rotation, the jumper 710 will strike the trip member collision boss 921 of the trip member driving arm 920 to drive the common trip member 900 to rotate, which will drive the common trip members of the other poles to rotate together via the trip member connecting pins 930. In the operating mechanisms of other poles, the shared member driving arm pushes the locking rod to rotate, the operating mechanism of the corresponding pole is unlocked, and the contact of the contact is disconnected.

The normal closing and opening process of the L-pole operating mechanism will now be described with reference to fig. 13 and 18.

Fig. 13 shows an initial state before closing the L-pole operating mechanism by the user, and in the state shown in fig. 13, the user pushes the handle 760 to rotate counterclockwise. The second connecting end 724 of the drive arcuate link 720 moves downwardly along the guide slot in the housing upon actuation of the handle 760. In the process that the jump buckle 710 moves downward following the second connection end 724, first, the jump buckle arm of the jump buckle 710 contacts one end of the latch lever 730 and is locked by the latch lever 730; then, the jumper 710 drives the moving contact assembly 740 to move through the coupling rod 750 until the moving contact assembly 740 contacts with the fixed contact assembly 800, and the closing operation is completed, and at this time, the L-pole operating mechanism is as shown in fig. 18.

Fig. 18 shows a schematic structural diagram of an L pole when the circuit breaker is closed. When the user needs to turn off the L-pole operating mechanism, the user pushes the handle 760 to rotate clockwise in the state shown in fig. 18. The handle 760 drives the bow-shaped link 720 to move upwards along the guide slot on the housing, and the movable contact assembly 740 is driven by the pressure spring 741 to rapidly leave the stationary contact assembly 800 until the movable contact assembly 740 collides with the limit portion of the housing. At the same time, the trip 710 and the coupling lever 750 are reset, completing the disconnection operation.

Referring to fig. 19, a schematic structural diagram of the L pole in fig. 13 when the L pole is unlocked due to the protection function of the circuit breaker is shown. Now, a process in which the L-pole operating mechanism is disconnected due to the protection function will be described with reference to fig. 18, 19, and 13.

When the circuit breaker product is subjected to a breaking operation (such as an overload or overcurrent condition) due to the protection function action, an actuator of the thermal system or the magnetic system pushes or pulls the latch lever 730 to rotate, the latch lever 730 leaves the contact position with the trip lever 710, and the trip arm of the trip lever 710 loses the support of the latch lever 730 to unlock the operating mechanism. Under the action of the pressure spring 741, the movable contact assembly 740 and the coupling rod 750 move rapidly to return. At this point, the handle 760 is still in the closed position, too late to react. The jumper 710 rotates rapidly and moves to a limit feature of the housing centered on the second connection end 724 of the arcuate link 720. The bow-shaped feature of the bow-shaped link 720 can better avoid the boss feature of the jump buckle 710, and the bending angle of the bow-shaped link 720 can avoid the coupling rod 750, so that the tripping process can be smoothly completed. Thereafter, the handle 760 and the trip catch 510 are reset back to the off position by the return spring 763.

In the embodiment, the single operating mechanism only controls a single contact, so that the device can be more flexibly applied to various types of products (such as 2P/3P/4P); moreover, the operating mechanism occupies a small space, and only occupies half of the module space of the operating mechanism, and the other half of the module space can be used for the following functions: (1) if a set of mechanisms is assembled, the functions of an Auxiliary Switch (AS) or a fault indication (FC) can be realized; (2) if a set of electronic components is assembled, many other control functions (such as communication, remote control, automatic reclosing, etc.) can be realized. The novel operating mechanism can optimize the assembly process, realize the unilateral assembly of all parts and components and save the production cost. Or, in the single module range, the other half of the corresponding space can be assembled with a set of complete independent operating mechanism, thereby realizing the double-handle control of the two-pole product.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.

Claims

1. The earth leakage fault indication mechanism of circuit breaker, the circuit breaker include a casing (100) and one rotationally connect in handle (200) of casing (100), including an earth leakage fault release (300) and an action connecting rod (610) in casing (100), its characterized in that, the earth leakage fault indication mechanism of circuit breaker includes:

an indicator (400) rotatably connected to said housing (100), a first return spring element (430) being connected between said indicator (400) and said housing (100);

a drive assembly (500) for earth leakage fault protection, disposed within the housing (100), the drive assembly (500) being switchable to a closed and locked state upon actuation of the handle (200);

when an electric leakage fault occurs, the push rod (310) of the electric leakage fault release (300) unlocks the driving assembly (500), so that the action connecting rod (610) opens the circuit breaker under the driving of the driving assembly (500), and the indicator (400) rotates and indicates the electric leakage fault under the driving of the first reset elastic element (430).

2. The electrical leakage fault indication mechanism of circuit breaker according to claim 2, wherein said indicator (400) comprises:

an indicator body (410) provided with an indication area (411); and

a connecting portion (420) extending in an axial direction of the indicator body (410), the connecting portion (420) being for connecting the handle (200);

under the drive of the handle (200), the connecting part (420) can rotate from the first initial position to the first locking position, and under the action of the first resetting elastic element (430), the connecting part (420) can return to the first initial position from the first locking position.

3. A leakage failure indicating mechanism of a circuit breaker according to claim 2, characterized in that: when the electric leakage fault occurs, the connecting part (420) returns to the first initial position, and the indicating area (411) is at least partially exposed out of the shell (100).

4. A leakage failure indicating mechanism of a circuit breaker according to claim 2, characterized in that:

the handle (200) is provided with a containing groove (211);

the connecting part (420) extends into the containing groove (211) and can slide in the containing groove (211).

5. A leakage fault indicating mechanism of a circuit breaker according to claim 4, wherein: the inner wall of one side of the accommodating groove (211) is a driving surface (2111), and the driving surface (2111) can push the connecting part (420) to rotate.

6. The electrical leakage fault indicating mechanism of circuit breaker according to claim 4, further comprising a mounting housing (110), wherein said indicator (400) and said handle (200) are mounted to said mounting housing (110) and cross-connected to both sides of said mounting housing (110).

7. The residual current fault indication mechanism of a circuit breaker according to claim 1, wherein said driving assembly (500) comprises:

a jump buckle (510) comprising a jump buckle body (512) and a jump buckle arm (511);

a driving rod (520) with two ends rotatably connected to the indicating member (400) and the jump buckle body (512), respectively;

a latch lever (530) pivotally connected to the housing (100);

an energy storage rod (540), which is connected with a second reset elastic element (541) with the shell (100); and

and the two ends of the coupling rod (550) are respectively and rotatably connected with the jump buckle body (512) and the energy storage rod (540).

8. An electrical leakage fault indicating mechanism of a circuit breaker according to claim 7, wherein a third restoring elastic member (531) is connected between the latch lever (530) and the housing (100).

9. The electrical leakage fault indicating mechanism of the circuit breaker according to claim 7, wherein the trip catch (510) moves from the second initial position to the second locking position under the driving of the indicator (400) and drives the energy storage lever (540) to compress the second return elastic element (541).

10. A leakage fault indicating mechanism of a circuit breaker according to claim 9, wherein:

the latch rod (530) can lock the jump buckle (510), and after the push rod (310) pushes the latch rod (530) to be separated from the jump buckle (510), the energy storage rod (540) can drive the jump buckle (510) to rotate.

11. A leakage fault indicating mechanism of a circuit breaker according to claim 7, wherein:

the jump buckle body (511) is provided with a boss (5121);

said actuating link (610) including an actuating arm (611), said actuating arm (611) having a flange (6112);

after the locking bar (530) is separated from the jump buckle (510), when the energy storage bar (540) drives the jump buckle (510) to rotate, the boss (5121) can act on the flange (6112) and drive the action connecting rod (610) to move.

12. A leakage fault indicating mechanism of a circuit breaker according to claim 8, wherein:

the trip arm (510) has an escape slot (5111);

when the action link (610) is actuated in a closed and locked state of the drive assembly (500), the flange (6112) can pass through the avoidance groove (5111).

13. The electrical leakage fault indication mechanism of circuit breaker according to claim 1, wherein said actuating link (610) further comprises a linkage arm (612), said actuating arm (611) and said linkage arm (612) are respectively located in different chambers of a module, said linkage arm (612) is capable of unlocking an operating mechanism of said circuit breaker.

14. A leakage failure indicating mechanism of a circuit breaker according to claim 1, characterized in that: the shell (100) further comprises a linkage piece (620) which is used for connecting another module of the circuit breaker, and the linkage piece (620) is connected with the action connecting rod (610) and can rotate under the driving of the action connecting rod (610).

15. Circuit breaker, characterized in that it comprises an electrical leakage fault indication mechanism of a circuit breaker according to any of claims 1-14.