CN111477518A

CN111477518A - Plug-in circuit breaker

Info

Publication number: CN111477518A
Application number: CN202010287527.2A
Authority: CN
Inventors: 卢科军; 杨安
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-07-31

Abstract

The invention relates to the field of low-voltage electric appliances, in particular to an insertion type circuit breaker, wherein a button mechanism comprises a closing button and an opening button, a locking mechanism comprises a second locking piece, and the second locking piece comprises a second locking end; pressing the closing button/opening button to drive the operating mechanism to close/open the circuit breaker, and simultaneously moving the opening button/closing button to the direction outside the circuit breaker shell, wherein the closing button and/or opening button drives the second locking piece to rotate, so that the second locking end protrudes out of the circuit breaker shell, and the second locking piece is limited by the closing button and/or opening button and cannot retract into the circuit breaker shell; the locking mechanism of the plug-in circuit breaker comprises a second locking piece which is directly matched with the button mechanism in a driving mode, and the situation that the circuit breaker is installed in a circuit breaker assembling position in a closing state and is pulled out of the circuit breaker assembling position in the closing state is avoided.

Description

Plug-in circuit breaker

Technical Field

The invention relates to the field of low-voltage electrical appliances, in particular to a plug-in circuit breaker.

Background

The wide use of the circuit breaker effectively improves the use safety of the electric appliance, and in order to meet the miniaturization development trend of electric equipment, the whole structure and the operation mode of the circuit breaker matched with the circuit breaker also need to be continuously upgraded and improved; after fully investigating and researching the prior art, the following defects of the prior circuit breakers are found:

the existing plug-in circuit breaker is provided with an independent opening and closing indication structure to indicate the opening and closing rotating state of the circuit breaker, so that the problems of complex internal structure and large integral volume of the circuit breaker are caused; in addition, the button of the operating mechanism often protrudes outside the breaker case, and thus the misoperation of the breaker is easily caused by the accidental touch, and the stability and safety of the power consumption are affected.

The existing plug-in circuit breaker generally has two locking mechanisms, one is to prevent the circuit breaker from being not installed in place to be switched on, the other is to prevent the circuit breaker from being plugged into or pulled out of a cabinet in a switching-on state, and the two locking mechanisms have complex structures and occupy a lot of internal space of the circuit breaker.

Thirdly, the existing plug-in circuit breaker is generally pulled out from the circuit breaker assembly position through a pull button; and the user is drawing when pressing and carrying out the separating brake operation, often can be because the operation dynamics holds inaccurate direct the circuit breaker of following the circuit breaker assembly position and extract, influences user's power consumption stability and security.

Fourth, the circuit breaker shell design of current plug-in circuit breaker is unreasonable, and the trompil dispersion that sets up on the shell is not convenient for the installation of circuit breaker.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a plug-in circuit breaker, wherein a locking mechanism of the plug-in circuit breaker comprises a second locking piece which is directly matched with a button mechanism in a driving way, so that the situation that the circuit breaker is assembled into a circuit breaker assembling position in a closing state and is pulled out of the circuit breaker assembling position in the closing state is avoided.

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

a plug-in circuit breaker comprises a circuit breaker shell 1, a button mechanism 2 arranged in the circuit breaker shell 1, an operating mechanism connected with the button mechanism 2, and a locking mechanism matched with the button mechanism 2; the button mechanism 2 comprises a closing button 20 and an opening button 21 which are respectively arranged in the breaker shell 1 in a sliding manner, the locking mechanism comprises a second locking piece 1b which is arranged on the breaker shell 1 in a pivoting manner, and the second locking piece 1b comprises a second locking end 13 b; pressing the closing button 20 to drive the operating mechanism to close the circuit breaker, and simultaneously moving the opening button 21 to the direction outside the circuit breaker shell 1, wherein the closing button 20 and/or the opening button 21 drives the second locking piece 1b to rotate, so that the second locking end 13b protrudes out of the circuit breaker shell 1, and the second locking piece 1b is limited by the closing button 20 and/or the opening button 21 and cannot retract into the circuit breaker shell 1; pressing the opening button 21 to drive the operating mechanism to open the circuit breaker and simultaneously move the closing button 20 to the outside of the circuit breaker housing 1, and the closing button 20 and/or the opening button 21 drives the second locking member 1b to rotate so that the second locking end 13b retracts into the circuit breaker housing 1.

Preferably, the closing button 20 includes a closing button driving part 207 in driving cooperation with the second locking part 1b, the opening button 21 includes an opening button driving part 217 in driving cooperation with the second locking part 1b, when the circuit breaker is closed, the opening button 21 drives the second locking part 1b to rotate through the opening button driving part 217, so that the second locking end 13b protrudes outside the circuit breaker housing 1, and the opening button driving part 217 abuts against the second locking end 13b, so that the second locking end 13b cannot retract inside the circuit breaker housing 1, when the circuit breaker is opened, the closing button 20 drives the second locking part 1b to rotate through the closing button driving part 207, so that the second locking end 13b retracts inside the circuit breaker housing 1, and the second locking end 13b limited by the closing button driving part 207 is kept inside the circuit breaker housing 1.

Preferably, the second locking member 1b includes a second locking member mounting portion 10b pivotally connected to the circuit breaker housing 1, a first locking member passive portion 11b in driving engagement with the closing button 20, a second locking member passive portion 12b in driving engagement with the opening button 21, and a second locking end 13 b; when the circuit breaker is switched on, the switching-off button 21 drives the second locking piece 1b to rotate through the first driven part 11b of the locking piece, so that the second locking end 13b protrudes out of the shell 1 of the circuit breaker, and when the circuit breaker is switched off, the switching-on button 20 drives the second locking piece 1b to rotate through the second driven part 12b of the locking piece, so that the second locking piece 13b retracts into the shell 1 of the circuit breaker.

Preferably, the second locking member 11b is of an i-shaped structure, the second locking member mounting portion 10b and the first locking member passive portion 11b are located at one end of the second locking member 1b to form one transverse side of the i-shaped structure, and the second locking member passive portion 12b and the second locking end 13b are located at the other end of the second locking member 1b to form the other transverse side of the i-shaped structure.

Preferably, the first driven part 11b of the locking member includes a first driven convex column 110b of the locking member protruding to one side of the opening button 21, and the second driven part 12b of the locking member includes a second driven convex column 120b of the locking member protruding to one side of the closing button 20;

when the circuit breaker is switched on, one side surface of the switching-off button driving part 217 drives the second locking part 1b to rotate through the first driven convex column 110b of the locking part, so that the second locking end 13b protrudes out of the shell 1 of the circuit breaker; when the circuit breaker is opened, one side surface of the closing button driving part 207 drives the second locking part 1b to rotate through the second driven convex column 120b of the locking part, so that the second locking end 13b retracts into the circuit breaker shell 1.

Preferably, the closing button driving part 207 includes a closing button driving inclined surface 2070 in driving engagement with the locking member second driven protrusion 120b, the opening button driving part 217 includes an opening button driving inclined surface 21700 in driving engagement with the locking member first driven protrusion 110b, the closing button driving inclined surface 2070 and the opening button driving inclined surface 21700 are inclined in opposite directions, and the locking member first driven protrusion 110b and the locking member second driven protrusion 120b are located between the opening button driving inclined surface 21700 and the closing button driving inclined surface 2070;

when the closing button 20 is pressed to close the circuit breaker, the closing button driving inclined surface 2070 moves along with the closing button 20 to the inner direction of the circuit breaker shell 1 to avoid the second locking piece 1b, meanwhile, the opening button driving inclined surface 21700 moves along with the opening button 21 to the outer direction of the circuit breaker shell 1, the driving inclined surface 21700 drives the second locking piece 1b to rotate through the first driven convex column 110b of the locking piece, so that the second locking end 13b protrudes out of the circuit breaker shell 1, and the driving inclined surface 21700 props against the first driven convex column 110b of the locking piece to prevent the second locking piece 1b from retracting into the circuit breaker shell 1;

when the opening button 21 is pressed to open the circuit breaker, the opening button driving inclined surface 21700 moves to the direction inside the circuit breaker housing 1 along with the opening button 21 to avoid the second locking member 1b, the closing button driving inclined surface 2070 moves to the direction outside the circuit breaker housing 1 along with the closing button 20, the closing button driving inclined surface 2070 extrudes the second locking member driven convex column 120b to enable the second locking end 13b to retract into the circuit breaker housing 1, and the closing button driving inclined surface 2070 limits the second locking member 1b to enable the second locking member 1b to be kept inside the circuit breaker housing 1.

Preferably, the second locking member 1b is stacked on the closing button 20 and the opening button 21 in the thickness direction of the circuit breaker.

Preferably, the locking mechanism further comprises a first locking member 1a having one end protruding outside the circuit breaker case 1;

when the circuit breaker is in a switching-off state, one end of a first locking piece 1a protrudes out of a shell 1 of the circuit breaker, the first locking piece 1a can retract into the shell 1 of the circuit breaker under the action of retraction external force, the first locking piece 1a retracts to be in limit fit with a switching-on button 20 and/or a switching-off button 21, and the switching-on button 20 and/or the switching-off button 21 are locked to prevent the circuit breaker from being switched on; when the circuit breaker is in a closing state, the first locking piece 1a protrudes out of the circuit breaker shell 1 and is limited by the closing button 20 and/or the opening button 21 and cannot retract into the circuit breaker shell 1.

Preferably, the closing button 20 and/or the opening button 21 are provided with button limiting grooves 216 for limiting and matching with the first locking member 1a, and the first locking member 1a comprises a first locking member limiting table 14a for limiting and matching with the button limiting grooves 216; when the circuit breaker is in a closing state, the button limiting groove 216 and the first locking piece limiting table 14a are arranged in a staggered mode, and the closing button 20 and/or the opening button 21 prevent the first locking piece 1a from moving towards the inner direction of the circuit breaker shell 1; when the circuit breaker is in the separating brake state, the button limiting groove 216 and the first locking part limiting table 14a are arranged relatively, the first locking part 1a can move towards the inner direction of the circuit breaker shell 1 when receiving indentation external force, and the first locking part limiting table 14a slides into the button limiting groove 216 to lock the closing button 20 and/or the separating brake button 21.

Preferably, the circuit breaker further comprises an unlocking mechanism, the unlocking mechanism comprises an independent pulling part 2a matched with the first locking part 1a in a driving mode, when the circuit breaker is in a switching-off state, one end of the first locking part 1a extends out of the circuit breaker shell 1 from the locking part opening hole 17, and the pulling part 2a can drive the first locking part 1a to retract into the circuit breaker shell 1.

The locking mechanism of the plug-in circuit breaker further comprises a second locking piece, and a second locking end of the second locking piece protrudes/retracts to the outside/inside of the shell of the circuit breaker in a switching-on/switching-off state of the circuit breaker, so that the situation that the circuit breaker is installed in a circuit breaker assembling position in the switching-on state or pulled out of the circuit breaker assembling position in the switching-on state is avoided, and the power utilization safety and the personal safety of a user are ensured; furthermore, the button mechanism of the plug-in circuit breaker comprises a closing button and an opening button, a user can respectively press the closing button/opening button to drive the circuit breaker to close/open, and the moving directions of the closing button and the opening button are opposite, namely when the closing button/opening button is pressed towards the inner direction of the shell of the circuit breaker to close/open the circuit breaker, the opening button/closing button moves towards the outer direction of the shell of the circuit breaker, namely, the user can distinguish the state (closing or opening state) of the circuit breaker by observing the states of the closing button and the opening button.

Drawings

Fig. 1 is a schematic view of the structure of the circuit breaker of the present invention, showing at least the structure of the operating mechanism;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1 in accordance with the present invention;

fig. 3 is a schematic exploded view of the circuit breaker of the present invention showing at least a first embodiment of a first and second track mechanism;

fig. 4 is a schematic structural diagram of a first embodiment of a closing button according to the present invention;

FIG. 5 is a schematic structural diagram of a first embodiment of the trip button of the present invention;

FIG. 6 is a schematic view of the construction of the transmission member of the present invention;

fig. 7 is a schematic structural view of a circuit breaker housing of the present invention showing at least a second embodiment of the first track mechanism;

fig. 8 is a schematic structural diagram of a second embodiment of the closing button according to the present invention;

FIG. 9 is a schematic structural diagram of a second embodiment of the trip button of the present invention;

FIG. 10 is a schematic view of the assembled construction of the puller and the first locking member of the present invention;

FIG. 11A is a schematic view of an assembly structure of the pulling member and the first locking member of the present invention, wherein the circuit breaker housing is provided with a pulling member holding magnet magnetically engaged with the pulling member operating portion of the pulling member;

FIG. 11B is a schematic view of the assembly structure of the pulling member and the first locking member of the present invention, wherein a pulling member return spring is disposed between the pulling member spring-retaining portion and the pulling member-retaining rib of the pulling member;

fig. 12 is a schematic view illustrating an assembly structure of the pulling member and the first locking member according to the present invention, in which the pulling member driving part drives the first locking member to move toward the inside of the case of the circuit breaker through the linking member;

FIG. 13 is a schematic view of the assembled configuration of the pull member and the first locking member of the present invention, with the first locking member fully moved into the circuit breaker housing and with the circuit breaker being pulled from the circuit breaker assembly position by continued pulling of the pull member;

fig. 14 is a schematic view of the engagement of the first locking member and the button mechanism of the present invention, when the circuit breaker is in a closed position, the trip button prevents the first locking member from moving in a direction inward of the circuit breaker housing;

fig. 15 is a schematic diagram of the first locking member and the button mechanism of the present invention, when the circuit breaker is in the open state, the button-defining slot of the open button is opposite to the first locking member-defining ledge, and the first locking member can move toward the inside of the circuit breaker housing;

FIG. 16 is a schematic structural view of a first embodiment of the first locking member of the present invention;

FIG. 17 is a schematic structural view of a second embodiment of the first locking member of the present invention;

FIG. 18 is a schematic view of the construction of a puller of the present invention;

FIG. 19 is a schematic structural view of a circuit breaker housing of the present invention with a pull tab cutout disposed between a second wire exit aperture and a pull tab access aperture;

fig. 20 is a schematic structural view of a circuit breaker housing of the present invention with a pull tab slot disposed between a trip button aperture and a pull tab actuation aperture;

FIG. 21 is a schematic view of the assembled construction of the secondary locking member of the present invention;

fig. 22 is a schematic view of the second locking member of the present invention engaged with a button mechanism, when the circuit breaker is in an open state and the closing button drives the second locking member to rotate, such that the second locking end retracts into the circuit breaker housing;

fig. 23 is a schematic structural view of a closing button and an opening button of the present invention, showing the structure of a closing button driving part and an opening button driving part;

fig. 24 is a schematic view of the second locking member of the present invention engaged with a button mechanism, when the circuit breaker is in a closed position, and the trip button drives the second locking member to rotate, such that the second locking end protrudes from the circuit breaker housing;

fig. 25 is a schematic structural view of a circuit breaker case of the present invention, showing the positional relationship of a button hole, an outlet hole, a breaker hole and a drawing member operating hole.

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. 1-25. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the circuit breaker of the present invention, especially an insertion type circuit breaker, includes a circuit breaker housing 1, a button mechanism 2 disposed inside the circuit breaker housing 1, an operating mechanism connected to the button mechanism 2, a moving contact 60 connected to the operating mechanism, and a stationary contact 61 used in cooperation with the moving contact 60; the button mechanism 2 can be operated to drive the breaker to open/close through the operating mechanism, so that the static contact 61 of the movable contact 60 is closed/opened.

Of course, as required, as shown in fig. 1, the circuit breaker of the present invention may further include a short-circuit protection mechanism 7, an overload protection mechanism, and an arc extinguishing system 8 disposed inside the circuit breaker housing 1; the short-circuit protection mechanism 7 and the overload protection mechanism drive the operation mechanism to act to trip the circuit breaker when the circuit breaker has short-circuit and overload faults respectively so as to realize a basic circuit protection function; the arc extinguishing system 8 is used for extinguishing electric arcs generated when the moving contact 60 and the static contact 61 are disconnected, so that the disconnection performance of the circuit breaker is improved, and the electricity safety is improved.

As shown in fig. 1 to 3, the circuit breaker housing 1 includes a closing button hole 110 and an opening button hole 111 provided thereon; the button mechanism 2 comprises a closing button 20 and an opening button 21 which are respectively arranged in the breaker shell 1 in a sliding mode, the closing button 20 comprises a closing button operating end which is arranged at one end of the closing button and is arranged in a closing button hole 110 in a sliding mode, and the opening button 21 comprises an opening button operating end which is arranged at one end of the opening button and is arranged in an opening button hole 111 in a sliding mode; and when the closing button operation end/opening button operation end driving operation mechanism is pressed towards the inner direction of the breaker shell 1 to enable the breaker to be closed/opened, the corresponding opening button operation end/closing button operation end moves towards the outer direction of the breaker shell 1.

Further, as shown in fig. 1 and 2, the operating mechanism includes a link mechanism, a transmission member 4 pivotally disposed in the circuit breaker housing 1, and a lever mechanism, the link mechanism includes a closing link 30, an opening link 31, and a transmission link 32; the other end of the closing button 20 is in driving connection with the transmission part 4 through a closing connecting rod 30, the other end of the opening button 21 is in driving connection with the transmission part 4 through an opening connecting rod 31, the transmission part 4 is in driving connection with a lever mechanism through a transmission connecting rod 32, and the lever mechanism is connected with a movable contact 60 of the circuit breaker; when the closing button 20 is pressed to close the circuit breaker, the closing button 20 drives the transmission member 4 to rotate towards a first direction through the closing connecting rod 30, and simultaneously the rotation of the transmission member 4 drives the opening button 21 to move towards the outer direction of the circuit breaker shell 1 through the opening connecting rod 31; when the opening button 21 is pressed to open the circuit breaker, the opening button 21 drives the transmission member 4 to rotate towards the second direction through the opening connecting rod 31, meanwhile, the transmission member 4 rotates towards the external direction of the circuit breaker shell 1 through the closing connecting rod 30, the closing button 20 is driven to move towards the external direction of the circuit breaker shell 1 through the closing connecting rod 30, and the first direction and the second direction are opposite. The function of the transmission part 4 is similar to that of a handle of a traditional miniature circuit breaker, the closing button 20 and the opening button 21 are linked with the transmission part 4 through connecting rods, and the connecting rod mechanism can adopt the existing schemes such as the existing four-connecting rod or multi-connecting rod.

The circuit breaker has the advantages that one improvement point is that the button mechanism 2 comprises a closing button 20 and an opening button 21, a user can press the closing button 20/the opening button 21 respectively to drive the closing/opening of the circuit breaker, and the moving directions of the closing button 20 and the opening button 21 are opposite, namely, when the closing button 20/the opening button 21 is pressed towards the inner direction of the shell 1 of the circuit breaker to enable the circuit breaker to be closed/opened, the corresponding opening button 21/the closing button 20 moves towards the outer direction of the shell 1 of the circuit breaker at the same time, namely, the user can distinguish the state (closing or opening state) of the circuit breaker by observing the states of the closing button 20 and the opening button 21; compared with the existing circuit breaker which adopts a pressing/pulling button mechanism to realize the switching-on/switching-off of the circuit breaker, the circuit breaker of the invention realizes the switching-on/switching-off of the circuit breaker by pressing the button, thereby avoiding the situation that the circuit breaker is pulled out by mistake, and secondly, the state of the circuit breaker can be judged by observing the states of the switching-on button 20 and the switching-off button 21, thereby not only needing to be provided with a switching-off indicating device separately, simplifying the structure of the circuit breaker and saving the internal space of the circuit breaker, but also being beneficial to the miniaturization development trend of the circuit breaker.

Preferably, as shown in fig. 10 to 24, the circuit breaker of the present invention further comprises a locking mechanism and a unlocking mechanism provided inside the circuit breaker case 1. As shown in fig. 10-18, the locking mechanism includes a first locking member 1a having one end protruding outside the circuit breaker housing 1, and meanwhile, a locking member opening 17 matched with the locking mechanism is formed in the circuit breaker housing 1, and an assembly position housing of the circuit breaker assembly position is provided with an assembly limit hole, after the circuit breaker is assembled in place, the locking member opening 17 of the plug-in circuit breaker corresponds to the assembly limit hole, when the plug-in circuit breaker is not installed in place, the locking member opening 17 of the plug-in circuit breaker is misaligned with the assembly limit hole, and the assembly position housing can block the locking member opening 17, which is a prior art in the field and is not described herein again.

Another improved point of the present invention is a locking and matching structure, when the circuit breaker is in an opening state, one end of the first locking member 1a extends out from the locking member opening 17 and protrudes outside the circuit breaker housing 1, the first locking member 1a can retract into the circuit breaker housing 1 under a retracting external force, and the first locking member 1a is in limit matching with the closing button 20 and/or the opening button 21, and the closing button 20 and/or the opening button 21 is locked to prevent the circuit breaker from being closed; when the circuit breaker is in a closing state, one end of the first locking piece 1a protrudes out of the circuit breaker shell 1, and is limited by the closing button 20 and/or the opening button 21 and cannot retract into the circuit breaker shell 1. When the first locking member 1a protrudes out of the circuit breaker housing 1, the first locking member 1a does not lock the closing button 20 and/or the opening button 21, and the closing button 20 and/or the opening button 21 can perform a normal opening and closing operation.

Preferably, as shown in fig. 10-17, before the circuit breaker is assembled to the circuit breaker, if the circuit breaker is in a closed state, one end of the first locking member 1a protrudes outside the circuit breaker housing 1 and is restrained by the closing button 20 and/or the opening button 21 from retracting inside the circuit breaker housing 1, so that the circuit breaker cannot be inserted into the circuit breaker assembly in the closed state;

when the circuit breaker is installed to a circuit breaker assembling position, an assembling position shell of the circuit breaker assembling position applies indentation external force to the first locking piece 1a in the assembling process, the first locking piece 1a is extruded to move towards the inner direction of the circuit breaker shell 1 and retracts into the circuit breaker shell 1, the first locking piece 1a is in limit fit with the closing button 20 and/or the opening button 21, the closing button 20 and/or the opening button 21 are locked to prevent the circuit breaker from being closed, and therefore the circuit breaker cannot be closed in the assembling process, and safety is improved;

after the circuit breaker is assembled in place, the locking piece open hole 17 corresponds to the assembly limiting hole, the assembly position shell does not apply indentation external force to the first locking piece 1a, the first locking piece 1a protrudes out of the shell 1 of the circuit breaker again, the unlocking button mechanism 2 enables the circuit breaker to be normally switched on and switched off through the switching-on button 20 or the switching-off button 21 and is not allowed to be randomly pulled out of the assembly position of the circuit breaker, and the circuit breaker is ensured not to fall out of the assembly position of the circuit breaker due to vibration in the transportation process;

after the circuit breaker is assembled in place, when the circuit breaker is in a closing state, the closing button 20 and/or the opening button 21 prevent the first locking piece 1a from moving towards the inner direction of the circuit breaker shell 1, so that the circuit breaker cannot be pulled out of a circuit breaker assembling position in the closing state.

Further, as shown in fig. 10-13 and 18, when the circuit breaker is in the opening state, the unlocking mechanism is operated to drive the first locking member 1a to move towards the inside of the circuit breaker housing 1, retract into the circuit breaker housing 1, and release the limit fit of the first locking member 1a and the assembly position housing and the limit fit of the button mechanism 2.

According to the circuit breaker locking mechanism, the locking mechanism is matched with the closing button 20 and/or the opening button 21, when the circuit breaker locking mechanism is installed to a circuit breaker assembling position, the first locking part 1a of the locking mechanism locks the closing button 20 and/or the opening button 21, the circuit breaker is prevented from being closed due to misoperation/mistaken touch of a user in the installation process, and the personal safety of the user is guaranteed; moreover, when the circuit breaker is in a closing state, the closing button 20 and/or the opening button 21 prevent the first locking member 1a from moving towards the inner direction of the circuit breaker housing 1, that is, once the circuit breaker is closed, the circuit breaker cannot be installed in a circuit breaker assembling position or cannot be randomly pulled out from the circuit breaker assembling position, so that the circuit breaker is ensured to be installed in the circuit breaker assembling position or can be pulled out from the circuit breaker assembling position in the opening state, and personal safety of a user is ensured.

It should be noted that the "locking/unlocking button mechanism 2" means that the movement of the closing button 20 and/or the opening button 21 in the design direction (i.e., the closing direction or the opening direction) is prevented/allowed by the first locking member 1a engaging/disengaging the limit engagement with/from the button mechanism 2.

After the circuit breaker is assembled to the circuit breaker assembling position and assembled in place, the first locking piece 1a is in limit fit with the assembling position shell of the circuit breaker assembling position; the release mechanism includes and draws piece 2a with first locking member 1a drive complex is independent, when the circuit breaker was in the separating brake state, the pulling was drawn piece 2a and can be driven first locking member 1a and remove to the inside direction of circuit breaker shell 1, and inside the circuit breaker shell 1 of withdrawal makes first locking member 1a remove with the spacing cooperation of assembly position casing, and the circuit breaker can be followed and pulled out in the circuit breaker assembly position. Further, as shown in fig. 10 to 13, the unlocking mechanism further includes a linkage member 3a, one end of the linkage member 3a is in driving fit with the first locking member 1a, the other end of the linkage member is in driving fit with the drawing member 2a, the drawing member 2a is pulled to drive the linkage member 3a to rotate, the first locking member 1a is driven to move towards the inner direction of the breaker shell 1, and the first locking member 1a retracts into the breaker shell 1 and is released from the limit fit with the assembly position shell. Compared with the existing circuit breaker which adopts the pull button to remove the limit fit with the assembly position shell, the circuit breaker has the further improvement that the pull piece 2a of the unlocking mechanism is independently arranged on the circuit breaker, and the button mechanism is not adopted to unlock the first locking piece, so that the situation that the circuit breaker is pulled out by mistake due to the pull button is avoided. In addition, according to the unlocking mechanism, the pulling piece 2a is in driving fit with the first locking piece 1a through the linkage piece 3a, so that the fault tolerance of the unlocking mechanism is improved, the structural accuracy requirements for the pulling piece 2a, the linkage piece 3a and the first locking piece 1a are reduced, the production difficulty is reduced, and the production efficiency is improved.

Preferably, as shown in fig. 21-24, the locking mechanism comprises a second locking member 1b pivotally disposed on the circuit breaker housing 1, the second locking member 1b comprising a second locking end 13 b; pressing the closing button 20 drives the operating mechanism to close the circuit breaker, and simultaneously, the opening button 21 moves towards the direction outside the circuit breaker shell 1, the closing button 20 and/or the opening button 21 drives the second locking piece 1b to rotate, so that the second locking end 13b protrudes out of the circuit breaker shell 1, the second locking piece 1b is limited by the closing button 20 and/or the opening button 21 and cannot retract into the circuit breaker shell 1, pressing the opening button 21 drives the operating mechanism to open the circuit breaker, and simultaneously, the closing button 20 moves towards the direction outside the circuit breaker shell 1, and the opening button 21 and/or the closing button 20 drives the second locking piece 1b to reversely rotate, so that the second locking end 13b retracts into the circuit breaker shell 1.

Further, as shown in fig. 22 and 24, when the circuit breaker is switched on, the switching-off button 21 drives the second locking member 1b to rotate, so that the second locking end 13b protrudes outside the circuit breaker housing 1, and when the circuit breaker is switched off, the switching-on button 20 drives the second locking member 1b to rotate, so that the second locking end 13b retracts inside the circuit breaker housing 1. Of course, when the circuit breaker is closed, the closing button 20 may drive the second locking end 13b to protrude outside the circuit breaker housing 1, and when the circuit breaker is opened, the opening button 21 may drive the second locking end 13b to retract inside the circuit breaker housing 1. According to the circuit breaker, the locking mechanism further comprises a second locking piece 1b, and a second locking end 13b of the second locking piece 1b protrudes out of the shell 1 of the circuit breaker when the circuit breaker is switched on, so that the circuit breaker is prevented from being installed in a circuit breaker assembling position in a switching-on state or pulled out of the circuit breaker assembling position in the switching-on state, and the power utilization safety and the personal safety of a user are guaranteed.

It should be noted that the first locking member 1a and the second locking member 1b of the locking mechanism of the present invention may be present at the same time to improve the electrical safety of the circuit breaker, although the first locking member 1a or the second locking member 1b may be provided alone, because their functions overlap each other to some extent or are different from each other. When the first locking piece 1a and the second locking piece 1b are arranged at the same time, the circuit breaker is switched on outside the circuit breaker assembly position, the first locking piece 1a and the second locking piece 1b both protrude out of the circuit breaker shell, and the circuit breaker cannot be installed in the circuit breaker assembly position; when the circuit breaker is installed on the circuit breaker assembling position and is not installed in place, the first locking piece 1a is pressed back into the shell of the circuit breaker by the assembling position shell to prevent a closing button from closing; the circuit breaker is switched on after being installed in a circuit breaker assembling position and installed in place, and the first locking piece 1a and the second locking piece 1b protrude out of the shell of the circuit breaker, cannot be unlocked and cannot be pulled out of the circuit breaker assembling position; after the circuit breaker is installed at a circuit breaker assembling position and is switched off, the second locking piece 1b returns into the circuit breaker shell, and the first locking piece 1a still protrudes out of the circuit breaker shell, so that the circuit breaker is prevented from being separated from the circuit breaker assembling position when the circuit breaker shakes in the conditions of transportation and the like; the circuit breaker is installed circuit breaker assembly position back and separating brake, and outside pulling draws piece 2a, draws piece 2a and draws back first locking piece 1a to the unblock in the circuit breaker shell, continues to draw first locking piece 1a and drives the circuit breaker and pull out the rack.

Preferably, as shown in fig. 19, 20 and 25, is an embodiment of the circuit breaker housing 1.

The circuit breaker housing 1 is integrally a hexahedral mechanism including a front side wall 1001 and a rear side wall 1002 which are oppositely disposed, an outlet hole 112, a button hole 110 and a drawing member operation hole 113 which are disposed on the front side wall 1001, and an inlet hole 14 which is disposed on the rear side wall 1002. The wire outlet 112, the button hole 110 and the operation hole 113 of the pulling element of the breaker housing 1 are intensively arranged on the front side wall 1001, which is more convenient for the user to operate, and the wire inlet 14 is arranged on the rear side wall 1002 opposite to the front side wall 1001, which is beneficial to increasing the creepage distance between the wire inlet end and the wire outlet end and improving the insulating property of the breaker. Further, as shown in fig. 25, the

button hole

110 and 111 includes a closing button hole 110 and an opening button hole 111 that are arranged side by side. Above-mentioned structure, the separation setting of the combined floodgate button and the separating brake button of the circuit breaker of being convenient for to realize circuit breaker combined floodgate/separating brake operation through not isostructure, compare with the current circuit breaker that realizes circuit breaker combined floodgate/separating brake through pressing down/drawing the button, avoided because of drawing when the button makes circuit breaker separating brake, the condition emergence of excessively violent pulling out the circuit breaker hard.

The circuit breaker of the present invention will be further described with reference to the drawings and the specific embodiments.

As shown in fig. 1-3, the circuit breaker of the present embodiment is an insertion circuit breaker, and includes a circuit breaker housing 1, a button mechanism 2 disposed inside the circuit breaker housing 1, an operating mechanism connected to the operating button 2, a movable contact 60 connected to the operating mechanism, and a fixed contact 61 used in cooperation with the movable contact 60; the button mechanism 2 is operated to drive the circuit breaker to close/open through the operating mechanism, so that the movable contact 60 and the fixed contact 61 are closed/opened. Of course, as required, as shown in fig. 1, the circuit breaker of the present invention may further include a short-circuit protection mechanism 7, an overload protection mechanism, and an arc extinguishing system 8 disposed inside the circuit breaker housing 1; the short-circuit protection mechanism 7 and the overload protection mechanism respectively drive the operating mechanism to act to trip the circuit breaker when the circuit breaker has short-circuit and overload faults so as to realize a basic circuit protection function; the arc extinguishing system 8 is used for extinguishing electric arcs generated when the moving contact 60 and the static contact 61 are disconnected, so that the disconnection performance of the circuit breaker is improved, and the electricity safety is improved. Further, the short-circuit protection mechanism 7 and the overload protection mechanism are an electromagnetic release and a bimetallic strip which are respectively in driving fit with the operating mechanism, and the arc extinguishing system 8 is an arc extinguishing chamber arranged on one side of the moving contact and the fixed contact 61 and comprises arc extinguishing chamber side walls and a plurality of arc extinguishing grid pieces arranged between the arc extinguishing chamber side walls.

Preferably, as shown in fig. 1-9, is one embodiment of the operating mechanism.

As shown in fig. 1 and 2, the circuit breaker case 1 includes a closing button hole 110 and an opening button hole 110 provided thereon; the button mechanism 2 comprises a closing button 20 and an opening button 21 which are respectively arranged in the breaker shell 1 in a sliding manner, the closing button 20 comprises a closing button operating end which is arranged at one end of the closing button and is arranged in a closing button hole 110 in a sliding manner, and the opening button 21 comprises an opening button operating end which is arranged at one end of the opening button and is arranged in an opening button operating hole 111 in a sliding manner; and when the switching-on/switching-off button operation end is pressed towards the inner direction of the breaker shell 1 to switch on/off the breaker, the switching-off/switching-on button operation end moves towards the outer direction of the breaker shell 1.

Further, as shown in fig. 1 and 2, the operating mechanism includes a link mechanism, a transmission member 4 pivotally disposed on the circuit breaker housing 1, and a lever mechanism, the link mechanism includes a closing link 30, an opening link 31, and a transmission link 32; the other end of the closing button 20 is in driving connection with the transmission part 4 through a closing connecting rod 30, the other end of the opening button 21 is in driving connection with the transmission part 4 through an opening connecting rod 31, the transmission part 4 is in driving connection with a lever mechanism through a transmission connecting rod 32, and the lever mechanism is connected with a movable contact 60 of the circuit breaker; when the closing button 20 is pressed towards the inner direction of the breaker shell 1 to close the breaker, the closing button 20 drives the transmission piece 4 to rotate towards the first direction through the closing connecting rod 30, and meanwhile, the rotation of the transmission piece 4 drives the opening button 21 to move towards the outer direction of the breaker shell 1 through the opening connecting rod 31; when the opening button 21 is pressed towards the inner direction of the breaker shell 1 to open the breaker, the opening button 21 drives the transmission member 4 to rotate towards the second direction through the opening connecting rod 31, meanwhile, the transmission member 4 rotates towards the outer direction of the breaker shell 1 through the closing connecting rod 30 to drive the closing button 20 to move, and the first direction and the second direction are opposite to each other.

Further, as shown in fig. 1 and 2, the lever mechanism includes a jumper 50, a latch 51 and a rotating plate 52, the rotating plate 52 is pivotally disposed on the circuit breaker housing 1, the jumper 50 and the latch 51 are in latch fit and are respectively pivotally disposed on the rotating plate 52, the rotating plate 52 is connected to the movable contact 60, and the transmission member 4 is drivingly connected to the jumper 50 through the transmission link 32; the transmission piece 4 rotates towards the first direction and drives the lever mechanism to integrally rotate towards the first direction through the transmission connecting rod 32, and the lever mechanism drives the moving contact 60 to swing so as to realize the closing of the circuit breaker; the transmission piece 4 rotates towards the second direction and drives the trip buckle 50 to rotate towards the second direction through the transmission connecting rod 32, so that the trip buckle 50 and the lock catch 51 are unlocked and matched, and the opening of the circuit breaker is realized; when the breaker has a short circuit or overload fault, the short circuit protection mechanism 7 or the overload protection mechanism acts to drive the lock catch 51, so that the hasp cooperation between the trip buckle 50 and the lock catch 51 is removed, and the tripping and tripping of the breaker are protected. Further, the movable contact 60 is connected to the rotating plate 52 through an elastic member to realize the over travel of the movable contact 60. Of course, other schemes can be adopted for the link mechanism, and the link mechanism belongs to the protection scope of the invention. Preferably, as shown in fig. 6, it is an embodiment of said transmission member 4.

As shown in fig. 6, the transmission member 4 includes a transmission member shaft hole 400, a first connection hole 40, a second connection hole 41, and a third connection hole 42, the first connection hole 41, the second connection hole 41, and the third connection hole 42 are respectively located at three vertices of a triangle, the transmission member shaft hole 400 is disposed at the middle portion of the transmission member 4, the first connection hole 40 and the third connection hole 42 are disposed at one side of the transmission member shaft hole 400, and the second connection hole 41 is disposed at the other side of the transmission member shaft hole 400; the transmission member 4 is pivotally disposed on the circuit breaker housing 1 through a transmission member shaft hole 400, and the transmission member 4 is connected to the closing link 30, the opening link 31, and the transmission link 32 through a first connection hole 40, a second connection hole 41, and a third connection hole 42, respectively.

Specifically, as shown in fig. 1, the upper, lower, left and right sides of fig. 1 are the upper, lower, left and right sides of the circuit breaker, and the side of fig. 1 facing the reader is the front side of the circuit breaker; a closing button hole 110 and an opening button hole 111 are formed in the upper side wall of the breaker shell 1; the upper end of the closing button 20 is a closing button operating end and is slidably arranged in the closing button hole 110, and the upper end of the opening button 21 is an opening button operating end and is slidably arranged in the opening button hole 111; the lower end of the closing button 20 is in driving connection with a first connecting hole 40 at the right end of the transmission part 4 through a closing connecting rod 30, the lower end of the opening button 21 is in driving connection with a second connecting hole 41 at the left end of the transmission part 4 through an opening connecting rod 31, a third connecting hole 42 at the right end of the transmission part 4 is in driving connection with a trip buckle 50 through a transmission connecting rod 32, and the transmission part 4 is pivotally arranged on a transmission part mounting shaft 104 on the breaker shell 1 through a transmission part shaft hole 400; the switching-on button 20 is pressed downwards, the switching-on button 20 drives the transmission part 4 to rotate clockwise (a first direction) through the switching-on connecting rod 30, the transmission part 4 simultaneously drives the moving contact 60 to swing clockwise through the transmission connecting rod 31, the trip buckle 50 and the lock catch 51 which are matched with the lock catch, and the rotating plate 52, and is closed with the static contact 61, and the circuit breaker enters a switching-on state; the opening button 21 is pressed downwards, the opening button 21 drives the transmission member 4 to rotate in the counterclockwise direction (the second direction) through the opening connecting rod 31, the transmission member 4 drives the trip buckle 50 to swing counterclockwise through the transmission connecting rod 31, the locking and unlocking cooperation with the locking buckle 51 is released, the rotating plate 52 drives the moving contact 60 to swing counterclockwise and disconnect with the static contact 61, and the circuit breaker enters the opening state.

Preferably, the switching-on button operating end and the switching-off button operating end are respectively provided with a first identifier and a second identifier for identifying a switching-on/off state, the first identifier and the second identifier both comprise color identifiers and/or symbol identifiers, the first identifier is used for identifying a switching-on state, and the corresponding second identifier is used for identifying a switching-off state; or the first identifier is used for identifying the switching-off state, and the second identifier is used for identifying the switching-on state. Further, the color marks and the character marks of the switching-on button operating end and the switching-off button operating end are different; for example, the color identifier and the symbol identifier of the closing button operation end may be a red/opening symbol (O), respectively, and the color identifier and the symbol identifier of the opening button operation end may be a green/closing symbol (I), respectively; when the breaker is switched on, the operating end of the switching-on button enters the switching-on button hole 110, the operating end of the switching-off button is highlighted on the switching-off button hole 111, and the switching-on state of the breaker can be judged through the green color identification and/or the switching-on symbol (I); on the contrary, when the circuit breaker is opened, the opening button operation end enters the opening button hole 111, the closing button operation end is highlighted on the closing button hole 110, and the circuit breaker can be judged to be in the opening state through the red color mark and/or the opening symbol (O). The first identification and the second identification on the switching-on button operation end and the switching-off button operation end are beneficial to a user to observe and judge the state of the circuit breaker more visually, and are beneficial to improving the power utilization safety of the user.

Preferably, as shown in fig. 3-5 and 7-9, the closing button 20 and the opening button 21 of the circuit breaker of the present invention are both shaped as a whole in a long strip, the closing button 20 and the opening button 21 are arranged in parallel and are linearly and slidably mounted in the circuit breaker housing 1, and the circuit breaker further includes a first rail mechanism and a second rail mechanism for defining moving paths of the closing button 20 and the opening button 21, respectively.

As shown in fig. 3-5, a first embodiment of the first and second track mechanisms.

As shown in fig. 3 to 5, the first rail mechanism includes a closing button rail base 201 disposed on the closing button 20 and a closing button rail groove 101 disposed on the circuit breaker housing, and the closing button rail base 201 is slidably disposed in the closing button rail groove 101; the second track mechanism comprises a separating brake button track groove arranged on the shell 1 of the circuit breaker, and the separating brake button 21 is arranged in the separating brake button track groove in a sliding mode. Further, as shown in fig. 3, the circuit breaker housing 1 includes a first rib 105, and the closing button rail groove 101 and the opening button rail groove are respectively located on two sides of the first rib 105; the closing button rail groove 105 is defined by a first rib 105 and a side wall of the circuit breaker case 1 opposite to the first rib 105; the circuit breaker housing 1 further comprises a second rib 102 opposite to the first rib 105, and the opening button track groove is enclosed by the first rib 105 and the second rib 102.

Preferably, as shown in fig. 4, the closing button 20 includes a closing button operation part 202 and a closing button transmission part 203, one end of the closing button operation part 202 is a closing button operation end, the other end of the closing button operation part is connected to the closing button transmission part 203 in a stacked manner, the other end of the closing button transmission part 203 is provided with a closing button connection hole 204 and a closing button rail table 201, the closing button connection hole 204 is connected to one end of a closing link 30 of the operation mechanism, and the closing button rail table 201 and the closing button operation part 202 are located on the same side of the closing button transmission part 203. Specifically, as shown in fig. 4, the left end of the closing button operating part 202 is a closing button operating end, the right end of the closing button operating part is connected to the left end of the closing button transmission part 203 in a stacked manner, the right end of the closing button transmission part 203 is provided with a closing button connecting hole 204 and a closing button rail platform 201, and the closing button transmission part 202 and the closing button rail platform 201 are located at the lower side of the closing button transmission part 203. Of course, the other end of the closing button operating part 202 may be horizontally connected to the closing button transmitting part 203 and located on the same plane, instead of the laminated connection structure.

Preferably, as shown in fig. 5, the opening button 21 includes an opening button operation part 212 and an opening button transmission part 213, one end of the opening button operation part 212 is an opening button operation end, the other end is connected to one end of the opening button transmission part 213, the other end of the opening button transmission part 213 is provided with an opening button connection hole 214, and the opening button connection hole 214 is connected to one end of the opening link 31 of the operation mechanism. Specifically, as shown in fig. 5, the opening button 21 is in a long strip shape, the left end of the opening button operation part 212 is an opening button operation end, the right end of the opening button operation part is connected to the opening button transmission part 213, the right end of the opening button transmission part 213 is provided with an opening button connection hole 214, and the opening button connection hole 214 is located at the lower side of the opening button transmission part 213.

Specifically, as shown in fig. 3, the first rib 105 is disposed on the circuit breaker housing 1 and forms a switching-on button rail groove 101 with the left side wall of the circuit breaker housing 1, and the second rib 102 is disposed on the right side of the first rib 105 and forms a switching-off button rail groove; the operating end of the closing button is arranged in the closing button hole 110 in a sliding mode, and meanwhile, the closing button track table 201 is arranged in the closing button track groove 101 in a sliding mode to limit the moving path of the closing button 20; the opening button operation end is slidably disposed in the opening button hole 111, and the opening button transmission part 213 is slidably disposed between the first rib 105 and the second rib 102 to define a moving path of the opening button 21.

As shown in fig. 7-9, a second embodiment of the first and second track mechanisms.

As shown in fig. 7 to 9, the first rail mechanism includes a closing button rail base 201 disposed on the closing button 20 and a closing button rail groove 101 disposed on the circuit breaker housing 1, the closing button rail base 201 being slidably disposed in the closing button rail groove 101; the second track mechanism comprises an opening button track bar 205 arranged on the closing button 20 and arranged along the length direction of the closing button 20 and an opening button track groove 2150 arranged on the opening button 21, and the opening button track groove 2150 is in sliding fit with the opening button track bar 205.

Preferably, as shown in fig. 8, the closing button 20 includes a closing button operation part 202, a closing button transmission part 203 and a switching-off button track bar 205, one end of the closing button operation part 202 is a closing button operation end, the other end of the closing button operation part is connected to one end of the closing button transmission part 203 in a stacked manner, the other end of the closing button transmission part 203 is provided with a closing button connection hole 204 and a closing button track table 201, the switching-off button track bar 205 is arranged on one side of the closing button transmission part 203, the switching-off button track bar 205 and the closing button operation part 202 are located on the same side of the closing button transmission part 203, and the closing button connection hole is connected to one end of a closing link 30 of the. Specifically, as shown in the direction shown in fig. 8, the upper end of the closing button operation part 202 is a closing button operation end, the lower end of the closing button operation part is connected to the upper end of the closing button transmission part 203 in a stacked manner, the lower end of the closing button transmission part 203 is provided with a closing button track platform 201 and a closing button connection hole 204, the opening button track strip 205 is arranged between the closing button operation part 202 and the closing button connection hole 204 and located on the right side of the closing button transmission part 203 and respectively connected to the closing button operation part 202 and the closing button connection hole 204, and the opening button track platform 201 is arranged on the left side of the closing. Further, as shown in fig. 8, a closing button foot 206 is disposed on the left side of the upper end of the closing button transmission part 203.

Preferably, as shown in fig. 9, the opening button 21 includes an opening button operation portion 212, an opening button transmission portion 213, an opening button track portion 215 and an opening button connection hole 214, one end of the opening button operation portion 212 is an opening button operation end, the other end is connected to one end of the opening button transmission portion 213, the other end of the opening button transmission portion 213 is provided with the opening button connection hole 214, the opening button track portion 215 is disposed on one side of the opening button transmission portion 213, and one side of the opening button track portion 215 facing the closing button transmission portion 203 is provided with an opening button track groove 2150. Specifically, as shown in fig. 9, the left end of the opening button operation part 212 is an opening button operation end, the right end is connected to the left end of the opening button transmission part 213, the right end of the opening button transmission part 213 is provided with an opening button connection hole 214, the opening button rail part 215 is disposed at the rear side of the right end of the opening button transmission part 213, and an opening button rail groove 2150 is disposed at the lower side of the opening button rail part 215.

Specifically, as shown in fig. 7, the first rail mechanism includes a third rib 1010 disposed on the circuit breaker housing 1, and a closing button rail groove 101 is disposed in the middle of the third rib 1010 along the length direction thereof; as shown in fig. 8, the closing button 20 further includes a closing button bottom foot 206, the closing button bottom foot 206 is disposed at one end of the closing button transmission part 203 connected to the closing button operation part 202, the closing button operation part 202 and the closing button operation part 202 are respectively located at two ends of the closing button transmission part 203, and the opening button track bar 205 is located between the closing button operation part 202 and the closing button connection hole 204 and respectively connected to the closing button operation part 202 and the closing button connection hole 204; the operating end of the closing button is arranged in the closing button hole 110 in a sliding mode, the bottom foot 206 of the closing button is matched with the third rib 1010 in a sliding mode, and the closing button track table 201 is arranged in the closing button track groove 101 in a sliding mode to limit the moving path of the closing button 20; the operating end of the opening button is arranged in the opening button hole 111 in a sliding mode, the opening button track part 215 is overlapped on one side of the closing button operating part 203, and the opening button track groove 2150 is in sliding fit with the opening button track bar 205 to limit the moving path of the opening button.

Preferably, as shown in fig. 10 to 24, the circuit breaker of the present invention further includes a locking mechanism provided inside the circuit breaker case 1, and the locking of the locking mechanism is designed as one of the improvement points of the present invention. .

Preferably, as shown in fig. 10-17, the locking mechanism includes a first locking member 1a having one end protruding outside the circuit breaker housing 1, the circuit breaker housing 1 includes a locking member opening 17 engaged with the first locking member 1a, one end of the first locking member 1a protrudes outside the circuit breaker housing 1 through the locking member opening 17, and when the circuit breaker is in the opening state, the first locking member 1a can retract inside the circuit breaker housing 1 by a retracting external force; for example, when the circuit breaker is installed to the circuit breaker assembly position, in the assembly process, the assembly position shell of the circuit breaker assembly position presses the first locking piece 1a to move the first locking piece 1a towards the inner direction of the circuit breaker shell 1 (the assembly position shell applies a retraction external force to the first locking piece 1a), so that the first locking piece 1a is in limit fit with the closing button 20 and/or the opening button 21, the closing button 20 and/or the opening button 21 is locked to prevent the circuit breaker from closing, after the circuit breaker is assembled in place, the locking piece opening 17 corresponds to the assembly limit hole of the assembly position shell, the first locking piece 1a protrudes out of the circuit breaker shell 1 from the locking piece opening 17 again and is released from limit fit with the closing button 20 and/or the opening button 21, the unlocking button mechanism and the first locking piece 1a are in limit fit with the assembly limit hole of the assembly position shell, so that the circuit breaker can perform normal closing and opening operations through the closing button 20, and does not allow for random extraction from the mounting location.

Further, as shown in fig. 14 to 17, the closing button 20 and/or the opening button 21 includes a button limiting groove 216 for limiting and matching with the first locking member 1a, and the first locking member 1a includes a first locking member limiting table 14a matching with the button limiting groove 216; when the circuit breaker is in a closing state, the button limiting groove 216 and the first locking piece limiting table 14a are arranged in a staggered mode, and the closing button 20 and/or the opening button 21 prevent the first locking piece 1a from moving towards the inner direction of the circuit breaker shell 1; when the circuit breaker is in a switching-off state, the button limiting groove 216 and the first locking part limiting table 14a are arranged oppositely, and the first locking part 1a can move towards the inner direction of the circuit breaker shell 1, so that the first locking part limiting table 14a slides into the button limiting groove 216.

Preferably, as shown in fig. 10 to 15, the closing button 20 and the opening button 21 are arranged in parallel and are linearly slidably mounted in the circuit breaker housing 1, the first locking member 1a is linearly movably mounted in the housing 6, and the moving directions of the closing button 20 and the opening button 21 are perpendicular to the moving direction of the first locking member 1 a. Further, as shown in fig. 10 to 15, the locking mechanism further includes a first return spring 5a disposed between the first locking member 1a and the circuit breaker housing 1, the first return spring 5a applies an acting force to the first locking member 1a, so that one end of the first locking member 1a is kept protruding outside the circuit breaker housing 1 without interference of other external forces, and when the circuit breaker is in the opening state, the first locking member 1a can retract into the circuit breaker housing 1 by a retracting external force.

Specifically, as shown in fig. 14 and 15, the closing button 20 and the opening button 21 can move left and right, and move in opposite directions synchronously, and the first locking member 1a can move up and down; as shown in fig. 14, when the circuit breaker is in a closed state, the button position-limiting groove 216 of the opening button 21 is disposed in a staggered manner with the first locking member position-limiting table 14a of the first locking member 1a, and the first locking member 1a cannot move downward; as shown in fig. 15, when the circuit breaker is in the open state, the button position-limiting groove 216 of the open button 21 is disposed opposite to the first locking member position-limiting table 14a of the first locking member 1a, and the first locking member 1a can move downward, so that the first locking member position-limiting table 14a slides into the button position-limiting groove, thereby limiting the left and right movement of the open button 21 and the close button 20. It should be noted that, the button limiting groove 216 may also be disposed on the closing button 20, and only when the circuit breaker is in the closing state, the button limiting groove 216 and the first locking member limiting table 14a are disposed in a staggered manner, and when the circuit breaker is in the opening state, the button limiting groove 216 and the first locking member limiting table 14a are disposed relatively.

Further, as shown in fig. 14 and 15, closing button 20 and separating brake button 21 parallel arrangement, closing button 20 and first locking member 1a all are located separating brake button 21's top, closing button 20 and first locking member 1a all are located between separating brake button 21 and the locking member trompil 17 promptly, and first locking member 1a is located one side of closing button 20, separating brake button 21 including be used for with the spacing complex button spacing groove 216 of first locking member 1a, first locking member 1a includes the spacing platform 14a of first locking member that matches with button spacing groove 216, be equipped with on the closing button 20 and be used for dodging the closing button of the spacing platform 14a of first locking member 1a and dodge groove 206. When one end of the first locking piece 1a extends out of the shell 1 of the circuit breaker, the first locking piece limiting table 14a is positioned in the closing button avoiding groove 206, the width of the closing button avoiding groove 206 is far larger than that of the first locking piece limiting table 14a in the moving direction of the closing button 20, the closing button 20 cannot be contacted with the first locking piece limiting table 14a when the closing button moves, and the closing button 20 and the opening button 21 can move to drive the circuit breaker to close and open; when the circuit breaker is in the combined floodgate state, the spacing platform of button 216 and first locking member 14a dislocation set, and the spacing platform of first locking member 14a is located the combined floodgate button and dodges the inslot 206, and separating brake button 21 prevents that first locking member 1a removes to the inside direction of circuit breaker housing 1, when the circuit breaker is in the separating brake state, the spacing platform of button 216 and first locking member 14a sets up relatively, and first locking member 1a receives indentation external force and can remove to the inside direction of circuit breaker housing 1, makes the spacing platform of first locking member 14a slide in the spacing groove of button 216.

In the preferred embodiment, the closing button 20 and the first locking member 1a are disposed on the same plane and both located above the opening button 21, so that the structure is more compact, the closing button 20 is provided with a closing button avoiding groove 206 to avoid the first locking member limiting table 14a of the first locking member 1a, and the movement of the closing button 20 during closing or opening is not affected; and the first locking piece 1a can also be abutted against the opening button 21, the unlocking and locking matching is carried out to ensure that the distance of the first locking piece 1a to be moved is short, the first locking piece limiting table 14a corresponds to the button limiting groove 216 of the opening button 21 during opening, the first locking piece 1a can be compressed into the breaker shell 1, the first locking piece limiting table 14a is dislocated with the button limiting groove 216 of the opening button 21 during closing, the first locking piece limiting table 14a is limited by the opening button 21 to ensure that the first locking piece 1a cannot be compressed into the breaker shell 1 and cannot be pulled out from the breaker assembly position in a closing state.

Preferably, as shown in fig. 10-13 and 18, the circuit breaker of the present invention further comprises an unlocking mechanism drivingly connected to the first locking member 1 a; when the circuit breaker is in a switching-off state, the first locking piece 1a can be driven to move towards the inner direction of the circuit breaker shell 1 by operating the unlocking mechanism, and the first locking piece retracts into the circuit breaker shell 1, is released from limiting matching with the assembly position shell and is in limiting matching with the button mechanism 2; when the circuit breaker is in a closing state, the closing button 20 and/or the opening button 21 prevent the first locking piece 1a from moving towards the inner direction of the circuit breaker shell 1, so that unlocking cannot be performed in the closing state, and the power utilization safety is guaranteed.

Further, as shown in fig. 10 to 13, the unlocking mechanism includes an independent pulling member 2a in driving fit with the first locking member 1a, and when the circuit breaker is in the opening state, the pulling member 2a can drive the first locking member 1a to move towards the inner direction of the circuit breaker housing 1, so that the first locking member 1a is released from the limit fit with the assembly position housing. Further, as shown in fig. 10-13, the unlocking mechanism further includes a linkage member 3a and a lever support 4a disposed on the circuit breaker housing 1, one end of the linkage member 3a is drivingly connected to the first locking member 1a, the other end is drivingly engaged with the pulling member 2a, and the middle portion is in contact engagement with the lever support 4 a; pulling the drawing piece 2a can drive the linkage piece 3a to rotate by taking the lever support 4a as a fulcrum, and the linkage piece 3a drives the first locking piece 1a to move towards the inner direction of the breaker shell 1 and remove the limit fit with the assembly position shell. As another embodiment, the unlocking mechanism may not be provided with the lever support 4a, but the link 3a is rotatably installed in the circuit breaker housing 1 through a matching between a kidney-shaped hole formed in the link 3a and a link rotating shaft fixed to the circuit breaker housing 1, one end of the link is matched with the pulling member 2a, and the other end of the link is matched with the first locking member 1a, and when the pulling member 2a is pulled, the link 3a is driven to rotate, so that the other end of the link 3a acts on the first locking member 1a, and the first locking member 1a is retracted into the circuit breaker housing 1.

Compared with the existing circuit breaker which adopts the pull button to remove the limit fit with the assembly position shell, the circuit breaker has the further improvement that the pull piece 2a of the unlocking mechanism is independently arranged on the circuit breaker, and the button mechanism is not adopted to unlock the first locking piece, so that the situation that the circuit breaker is pulled out by mistake due to the pull button is avoided. It should be noted that the independent pulling element 2a of the present invention is not only applicable to the embodiment of the closing button 20 and the opening button 21 of the present invention, but also applicable to the case where one button is used to perform the opening and closing operation.

It should be noted that, as an alternative embodiment, the first locking element 1a may not be provided with the first locking element limiting table 14a, and the pulling and pulling element 2a can drive the first locking element 1a to move towards the inside of the circuit breaker housing 1 no matter the circuit breaker is switched on or switched off.

Preferably, as shown in fig. 17, a first embodiment of the first locking member 1a is provided.

As shown in fig. 17, the first locking member 1a includes a first locking member body 10a, a first locking member stopper 11a, a first locking member stopper 14a, and a locking member spring stopper 15 a; the first locking piece stopping table 11a and the first locking piece limiting table 14a are respectively arranged at two sides of the first locking piece main body 10a, and the locking piece spring limiting structure 15a is arranged at one side of the first locking piece main body 10a far away from the locking piece opening 17; first locking piece main part 10a one end is outstanding outside circuit breaker housing 1 through the locking piece trompil 17 that sets up on circuit breaker housing 1, the other end passes through locking piece spring limit structure 15a and links to each other with first reset spring 5a, the spacing cooperation of first reset spring 5a one end and locking piece limit structure 15a, the other end and the spacing cooperation of circuit breaker housing 1, first locking piece keeps off the spacing cooperation of platform 11a and circuit breaker housing 1, prevent that first locking piece 1a deviates from through locking piece trompil 17. Further, as shown in fig. 17, the first locking member 1a further includes a first locking member receiving portion 130a connected to the linkage member 3a of the unlocking mechanism, a first locking member connecting hole 13a is formed in a middle portion of the first locking member receiving portion 130a, and one end of the linkage member 3a is inserted into the first locking member connecting hole 13 a; the first lock receiving portion 130a is provided on the first lock main body 10a side between the first lock main body 10a and the lever support 4 a. Further, as shown, the locking member spring limiting structure 15a is a spring limiting groove.

Preferably, as shown in fig. 16, a second embodiment of said first locking member 1 a.

As shown in fig. 16, the first locking member 1a of the present embodiment is different from the first embodiment in that: instead of the protruding first lock receiving portion 130a, one end of the first lock main body 10a protrudes outside the circuit breaker case 1, and one side of the other end is provided with a first lock connection hole 13a as the first lock receiving portion 130 a. Further, as shown in fig. 17, the locking member spring limiting structure 15 is a spring limiting boss. Obviously, the first locking member 1a can be provided with other similar structures as needed.

Preferably, as shown in figures 10, 11A, 11B and 18, are a plurality of embodiments of said drawing member 2 a.

The drawing piece 2a comprises a drawing piece operating part 20a, a drawing piece first transition part 21a and a drawing piece driving part 24a, wherein the drawing piece operating part 20a is vertically connected with the drawing piece first transition part 21a, and the drawing piece driving part 24a is obliquely connected with the drawing piece first transition part 21 a; the drawing piece operating part 20a forms an operating part convenient for drawing by hands or tools, the first transition part 21a of the drawing piece is parallel to the moving direction of the drawing piece 2a to form a sliding support, and the drawing piece driving part 24a is obliquely arranged and used for driving the linkage piece 3a to drive the first locking piece 1a to retract into the circuit breaker shell 1. In one embodiment, the pulling element 2a only comprises the pulling element operating portion 20a, the pulling element first transition portion 21a and the pulling element driving portion 24a, and the pulling element 2a forms an approximate zigzag structure or a U-shaped structure, the zigzag structure occupies a relatively large space, and the U-shaped structure and the locking mechanism have poor stability of sliding fit.

A further preferred embodiment is shown in fig. 11A, further comprising a second transition part 22a of the pulling member connected between the first transition part 21A of the pulling member and the driving part 24a of the pulling member, wherein the second transition part 22a of the pulling member is parallel to the operating part 20a of the pulling member and perpendicular to the first transition part 21A of the pulling member, the second transition part 22a of the pulling member and the operating part 20a of the pulling member are both located at one side of the first transition part 21A of the pulling member to form a U shape, the space occupied by the pulling member 2a is reduced by bending, the second transition part 22a of the pulling member can be used for pulling out the circuit breaker and limiting the position of the pulling member 2a, and the driving part 24a of the pulling member is bent obliquely to a side away from the operating part 20a of the pulling member and close to the first transition part 21A of the pulling member.

A further preferred embodiment is shown in fig. 11B, further comprising a third transition 23a of the drawing member arranged between the second transition 22a of the drawing member and the driving portion 24a of the drawing member, the third transition 23a being arranged in parallel with the first transition 21a of the drawing member for balancing the sliding of the drawing member 2a and adjusting the position of the driving portion 24a of the drawing member; and/or the drawing piece holding part 25a is connected with the drawing piece driving part 24a, the drawing piece holding part 25a is parallel to the drawing piece first transition part 21a, after the inclined drawing piece driving part 24a drives the linkage piece 3a step by step to drive the first locking piece 1a to retract into the circuit breaker shell 1, the drawing piece holding part 25a keeps the first locking piece 1a in the retracting position through the linkage piece 3 a.

As shown in fig. 18, the preferred embodiment of the puller 2a, the puller 2a comprises a puller operating part 20a, a puller first transition part 21a, a puller second transition part 22a, a puller third transition part 23a, a puller driving part 24a and a puller holding part 25a which are connected in sequence; the drawing piece operating part 20a and the drawing piece second transition part 22a are arranged in parallel, the drawing piece first transition part 21a, the drawing piece third transition part 23a and the drawing piece holding part 25a are arranged in parallel and perpendicular to the drawing piece operating part 20a, the drawing piece driving part 24a is arranged in an inclined mode, one end connected with the drawing piece third transition part 23a in a bending mode is a driving part first end, one end connected with the drawing piece holding part 25a in a bending mode is a driving part second end, and the first end of the driving part is far away from the first locking part 1a relative to the driving part second end. Further, the drawing piece 2a is integrally formed, and is formed by punching and bending a metal material.

Preferably, as shown in fig. 10 to 13, the circuit breaker housing 1 further includes a drawing member limiting rib 6a disposed between the drawing member operating portion 20a and the drawing member second transition portion 22 a; drawing the first locking piece 1a of drawing member 2a drive and withdrawing 1a of circuit breaker shell 1 inside and remove with the spacing cooperation of assembly position casing after, continue drawing the spacing cooperation of drawing member 2a and making it and drawing a spacing muscle 6a of piece, extract the circuit breaker from circuit breaker assembly position.

Specifically, as shown in fig. 10, 11A and 11B, the right end of the first locking member 1A protrudes outside the circuit breaker housing 1, the left end of the first locking member 1A is connected to the right end of the linkage member 3a and is connected to the circuit breaker housing 1 through the first return spring 5a, the middle of the linkage member 3a is in contact fit with the lever support 4a disposed above the first locking member 1A, the left end of the linkage member 3a is in driving fit with the pulling member driving portion 24a, and the upper end and the lower end of the pulling member driving portion 24a are respectively a driving portion first end and a driving portion second end; when the circuit breaker is in a switching-off state, the pulling part 2a is pulled upwards until the pulling part driving part 24a contacts with the left end of the linkage part 3a (as shown in fig. 12), as shown in fig. 13, the pulling part 2a can drive the linkage part 3a to rotate clockwise by taking the lever support 4a as a fulcrum, then the right end of the linkage part 3a drives the first locking part 1a to move towards the left side, and the right end of the first locking part 1a is completely retracted into the circuit breaker shell 1 and is in limited fit with the button mechanism 2, so that the limited fit of the first locking part 1a and the assembly position shell is released, and the pulling part holding part 25a is in limited fit with the left end of the linkage part 3a, so that the first locking part 1a is held in the circuit breaker shell 1.

Preferably, as shown in fig. 11A, the pulling member 2a is made of a metal magnetic material, and the unlocking mechanism further includes a pulling member holding magnet disposed in the circuit breaker housing 1 and engaged with the pulling member operating portion 20a, and the holding magnet is mounted in a recess 105 of the circuit breaker housing 1 and magnetically engaged with the pulling member operating portion 20 a. The drawing piece holding magnet can reliably hold the drawing piece operating part 20 in the breaker shell, so that the appearance of the breaker is neat and attractive when the drawing piece 2a is not required to be operated, and the condition that the drawing piece 2a is unexpectedly protruded out of the breaker shell 1 to cause misoperation or damage of the drawing piece 2a is avoided. Further, when the pulling member 2a is pulled out to the proper position, the second transition portion 22a can also be magnetically engaged with the pulling member holding magnet, so that the pulling member is held in the pulled-out position outside the circuit breaker housing 1.

Note that the "magnetic attraction fit" means that the drawer operating portion 20a is attracted by the drawer holding magnet. The drawing piece 2a is made of a metal magnetic material, which means that it can be magnetically attracted by a drawing piece holding magnet, and it is not necessarily a magnet.

Preferably, as shown in fig. 1, 19, 20 and 25, the circuit breaker housing 1 further includes an outlet 112 and a drawing operation hole 113, the outlet 112, the drawing operation hole 113, the closing button hole 110 and the opening button hole 111 are located on the same side wall of the circuit breaker housing 1, the circuit breaker housing 1 further includes a drawing matting 16, a drawing operation part 20a of the drawing part 2a is disposed in the drawing operation hole 113, so that the drawing part 2a is not protruded out of the circuit breaker housing 1 when not pulled outwards, the drawing matting 16 is communicated with the drawing operation hole 113, and the drawing operation is performed through the drawing matting 16.

Further, in a preferred scheme, the pulling part matting groove 16 is arranged between the wire outlet 112 and the pulling part operation hole 113 and is shielded by the wire outlet, two ends of the pulling part matting groove 16 are respectively communicated with the wire outlet 112 and the pulling part operation hole 113, and only when the wire outlet is removed, the pulling part operation part 20a can be matting from the pulling part operation hole 113 at the pulling part matting groove 16; or, as another preferred scheme, draw a setting of digging 16 and draw between a switch-off button hole 111 and a drawing operation hole 113, when the circuit breaker is in the combined floodgate state, switch-off button 21 shelters from and draws a digging 16, and when the circuit breaker was in the switch-off state, switch-off button 21 removed to circuit breaker housing 1 inside direction, let open and draw a digging 16, could draw an operation portion 20a and draw and dig out from drawing an operation hole 113 drawing a digging 16 department. When being qualified for the next round of competitions the wire was demolishd, just can pull out drawing the piece when the circuit breaker is in the separating brake state, the setting up of above-mentioned structure has guaranteed only that the circuit breaker is in the separating brake state under, and unlocking mechanism could unblock first locking piece 1a and the spacing cooperation of assembly position casing, avoids the circuit breaker under the combined floodgate state, draws drawing piece 2a, leads to drawing piece 2a to be damaged or the circuit breaker takes place by the electrified condition of pulling out, has guaranteed user's power consumption security.

Preferably, as another embodiment of the drawing member shown in fig. 11B, the drawing member 2a further includes a drawing member spring limiting portion 26a, and the drawing member spring limiting portion 26a is disposed in parallel with the drawing member operation portion 20a and respectively located at two ends of the drawing member 2 a; the unlocking mechanism further comprises a puller return spring 7a arranged between the puller spring limiting part 26a and the puller limiting rib 6 a. The puller return spring 7a can reliably hold the puller holding part 20a of the puller 2a in the circuit breaker case. The puller spring limiting part 26a is connected with the puller holding part 25a in a bending way, or is directly connected with the puller driving part 24a in a bending way.

Further, as shown in fig. 10 to 13, the drawing member 2a is stacked with the closing button 20 and the opening button 21 in the thickness direction of the circuit breaker to save space. The moving direction of the drawing piece 2a is parallel to the moving direction of the closing button 20 and the opening button 21, and is perpendicular to the moving direction of the first locking piece 1a, and the first locking piece 1a moves along the width direction of the circuit breaker. The first transition part 21a of the drawing piece 2a abuts against the side wall, provided with the locking piece opening 17, of the circuit breaker shell 1 to move, and the first transition part 21a is limited in the moving direction to slide between the drawing piece limiting rib 6a and the lever support 4a and is limited by one end of the drawing piece limiting rib 6a and the circuit breaker shell 1 in the direction perpendicular to the moving direction. The first transition part 21a and the first locking part 1a are respectively arranged at two sides of the lever support 4a, and the linkage part 3a is positioned between the first locking part 1a and the lever support 4 a; draw piece 2a, linkage 3a and first locking member 1a and all range upon range of the setting with closing button 20 and separating brake button 21 on the thickness direction of circuit breaker, be located closing button 20 and separating brake button 21 top, the protruding closing button who extends to closing button 20 of spacing platform 14a of first locking member 1a dodges in the groove 206.

Preferably, the linkage member 3a is a Z-shaped or U-shaped pull rod, one end of the pull rod is inserted into the first locking member 1a, the other end of the pull rod extends to the sliding position of the pull member driving part 24a of the pull member 2a, the linkage member 3a drives the first locking member 1a to retract into the circuit breaker housing 1 by means of the lever support 4a as a rotary support, the installation structure is simple, and the lever support 4a simultaneously plays a role in limiting the first locking member 1a and supporting the linkage member 3 a.

Preferably, as shown in fig. 21 to 24, the locking mechanism further comprises a second locking member 1 b.

As shown in fig. 21-24, the second locking member 1b is pivotally disposed on the circuit breaker housing 1, the second locking member 1b including a second locking end 13 b; when the circuit breaker is switched on, the switching-on button 20 or the switching-off button 21 drives the second locking piece 1b to rotate (rotate towards the second direction), so that the second locking end 13b protrudes out of the shell 1 of the circuit breaker, and when the circuit breaker is switched off, the switching-off button 21 or the switching-on button 20 drives the second locking piece 1b to rotate (rotate towards the first direction), so that the second locking end 13b retracts into the shell 1 of the circuit breaker.

Further, as shown in fig. 22-24, the closing button 20 includes a closing button driving portion 207 in driving fit with the second locking member 1b, and the opening button 21 includes an opening button driving portion 217 in driving fit with the second locking member 1b, as shown in fig. 24, when the circuit breaker is closed, the opening button 21 drives the second locking member 1b to rotate through the opening button driving portion 217, so that the second locking end 13b protrudes outside the circuit breaker housing 1, and the opening button driving portion 217 abuts against the second locking end 13b, so that the second locking end 13b cannot retract inside the circuit breaker housing 1; as shown in fig. 22, when the circuit breaker is opened, the second locking member 1b is driven to rotate by the closing button 20 through the closing button driving part 207, so that the second locking end 13b is retracted into the circuit breaker housing 1, and the closing button driving part 207 limits the second locking end 13b to be kept in the circuit breaker housing 1. Specifically, as shown in the direction of fig. 24, when the circuit breaker is closed, the opening button 21 drives the second locking member 1b to rotate counterclockwise (rotate in the second direction), so that the second locking end 13b protrudes outside the circuit breaker housing 1; as shown in fig. 22, when the circuit breaker is opened, the closing button 20 drives the second locking member 1b to rotate clockwise (rotate in the first direction), so that the second locking end 13b is retracted outside the circuit breaker housing 1.

Preferably, as shown in fig. 22 to 24, the second locking member 1b includes a second locking member mounting portion 10b pivotally connected to the circuit breaker housing 1, a first locking member passive portion 11b in driving engagement with the opening button 21, a second locking member passive portion 12b in driving engagement with the closing button 20, and a second locking end 13 b; when the circuit breaker is switched on, the switching-off button 21 drives the second locking piece 1b to rotate through the first driven part 11b of the locking piece, so that the second locking end 13b protrudes out of the shell 1 of the circuit breaker, and when the circuit breaker is switched off, the switching-on button 20 drives the second locking piece 1b to rotate through the second driven part 12b of the locking piece, so that the second locking piece 13b retracts into the shell 1 of the circuit breaker. The first passive portion 11b and the second locking end 13b are two mating ends in this embodiment, and as another embodiment, the second locking end 13b and the second locking end 13b may be the same mating end. Further, as shown in fig. 22 and 24, the first passive part 11b of the locking member includes a first passive cylinder 110b of the locking member protruding to one side of the opening button 21, the second passive part 12b of the locking member includes a second passive cylinder 120b of the locking member protruding to one side of the closing button 20, the first passive cylinder 110b of the locking member and the second passive cylinder 120b of the locking member are located at the same side of the second locking member 1b, when the circuit breaker is closed, one side surface of the driving part 217 of the opening button drives the second locking member 1b to rotate through the first passive cylinder 110b of the locking member, so that the second locking end 13b protrudes outside the circuit breaker housing 1; when the circuit breaker is opened, one side surface of the closing button driving part 207 drives the second locking part 1b to rotate through the second driven convex column 120b of the locking part, so that the second locking end 13b retracts into the circuit breaker shell 1.

Further, as shown in fig. 22 to 24, the closing button driving part 207 includes a closing button driving inclined surface 2070 in driving engagement with the locking member second driven protrusion 120b, the opening button driving part 217 includes an opening button driving inclined surface 21700 in driving engagement with the locking member first driven protrusion 110b, the closing button driving inclined surface 2070 and the opening button driving inclined surface 21700 are inclined in opposite directions, and the locking member first driven protrusion 110b and the locking member second driven protrusion 120b are located between the opening button driving inclined surface 21700 and the closing button driving inclined surface 2070;

when the opening button 21 is pressed to open the circuit breaker, the opening button driving inclined surface 21700 moves to the direction inside the circuit breaker housing 1 along with the opening button 21 to avoid the second locking member 1b, the closing button driving inclined surface 2070 moves to the direction outside the circuit breaker housing 1 along with the closing button 20, the closing button driving inclined surface 2070 presses the second locking member driven convex column 120b to retract the second locking end 13b into the circuit breaker housing 1, and the closing button driving inclined surface 2070 limits the second locking member 1b to keep the second locking member 1b inside the circuit breaker housing 1. Further, as shown in fig. 22 and 23, the closing button driving slant 2070 is formed by a closing button driving protrusion provided on the closing button 20, the opening button driving slant 21700 is formed by an opening button driving groove provided on the opening button 21, and the closing button driving slant 2070 and the opening button driving slant 21700 form a funnel-shaped structure when the circuit breaker is in an opening state.

Preferably, as shown in fig. 22 to 24, the opening button driving part 217 includes an opening button driving part first step 2170 disposed on one side of the opening button 21 and an opening button driving part second step 2171 disposed on one side of the opening button driving part first step 2170 far from the opening button 21, the opening button driving part first step 2170 is integrally formed in a triangular structure, and the opening button driving part second step 2171 is disposed at one vertex corner of the triangular structure near the closing button 20.

Further, as shown in fig. 22 and 24, the second locking member 11b has an approximately i-shaped configuration, the second locking member mounting portion 10b and the locking member first passive portion 11b are located at one end of the second locking member 1b to form one lateral side of the i-shaped configuration, and the locking member second passive portion 12b and the second locking end 13b are located at the other end of the second locking member 1b to form the other lateral side of the i-shaped configuration.

Further, as shown in fig. 3 and 21 to 24, the second locking member 11b is stacked with the closing button 20 and the opening button 21 in the thickness direction of the circuit breaker to save space. In the thickness direction of the circuit breaker, the second locking piece 11b is positioned above the closing button 20 and the opening button 21, and the pulling piece 2a is positioned above the second locking piece 11 b; the first locking element 1a is located above the second locking end 13b of the second locking element 11b, and one end of the first locking element 1a and the second locking end 13b share one large locking element opening 17, but may of course be two separate locking element openings. The first locking member 1a is closer to the inside of the circuit breaker case 1 than the second locking member 11b in the moving direction of the on-off button 20 and the off-off button 21.

As shown in fig. 25, is an embodiment of the circuit breaker case 1.

As shown in fig. 25, the circuit breaker housing 1 is integrally formed in a hexahedral structure, which includes a front side wall 1001 and a rear side wall 1002 disposed opposite to each other, an outlet hole 112, a button hole 110 and a drawing member operation hole 113 provided on the front side wall 1001, and an inlet hole 14 provided on the rear side wall 1002.

Preferably, as shown in fig. 25, the

button hole

110 and 111 includes a closing button hole 110 and an opening button hole 111 that are arranged side by side. Further, the closing button operation end of the closing button 20 and the opening button operation end of the opening button 21 are respectively slidably disposed in the closing button hole 110 and the opening button hole 111, and are not protruded from the front side wall 1001 of the circuit breaker housing 1 all the time, so that the situation that a user causes closing/opening of the circuit breaker due to mistaken touching of the closing button operation end/opening button operation end is avoided, and the stability and safety of power consumption of the user are ensured.

Preferably, as shown in fig. 25, the

button hole

110 and 111 and the pulling member operation hole 113 are disposed at one end of the front sidewall 1001, one outlet hole 112 is disposed at the other end of the front sidewall 1001 and is a first outlet hole, and the other outlet hole 112 is disposed between the first outlet hole and the

button hole

110 and 111 and is a second outlet hole; the

button hole

110 and 111 and the second wire outlet hole are located on the same side of the pulling member operation hole 113. Further, as shown in fig. 19, the circuit breaker housing 1 further includes a drawing piece matting groove 16 disposed on the front side wall 1001, the drawing piece matting groove 16 is disposed between the second wire outlet and the drawing piece operation hole 113, and two ends of the drawing piece matting groove 16 are respectively communicated with the second wire outlet and the drawing piece operation hole 113, and the wire outlet inserted into the second wire outlet shields the drawing piece matting groove 16; or, as shown in fig. 20, the drawing piece digging groove 16 is arranged between the opening button hole 111 and the drawing piece operating hole 113, and when the circuit breaker is in a closing state, the opening button 21 of the circuit breaker blocks the drawing piece digging groove 16.

Preferably, as shown in fig. 25, the circuit breaker housing 1 further includes a wire removing hole 1120 provided on the front side wall 1001 and a communication hole 15 provided on the rear side wall 1002, wherein the wire removing hole 1120 is matched with the wire outlet hole 112 in a one-to-one manner, and the communication hole 15 is located between the two wire inlet holes 14.

Preferably, as shown in fig. 25, the circuit breaker housing 1 further comprises a third side wall 1003 and a fourth side wall 1004 which are oppositely arranged, and a fifth side wall 1005 and a sixth side wall 1006 which are oppositely arranged; the third, fourth, fifth and

sixth sidewalls

1003, 1004, 1005 and 1006 are located between the front and rear sidewalls 1001 and 1002. Further, as shown in fig. 25, an end of the third side wall 1003 near the front side wall 1001 is provided with a locking member opening 17.

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

Claims

1. A plug-in circuit breaker comprises a circuit breaker shell (1), a button mechanism (2) arranged in the circuit breaker shell (1), an operating mechanism connected with the button mechanism (2), and a locking mechanism matched with the button mechanism (2); the method is characterized in that:

the button mechanism (2) comprises a closing button (20) and an opening button (21) which are respectively arranged in the breaker shell (1) in a sliding mode, the locking mechanism comprises a second locking piece (1b) which is arranged on the breaker shell (1) in a pivoting mode, and the second locking piece (1b) comprises a second locking end (13 b);

the closing button (20) is pressed to drive the operating mechanism to close the circuit breaker, the opening button (21) is moved towards the direction outside the circuit breaker shell (1), the closing button (20) and/or the opening button (21) drive the second locking piece (1b) to rotate, the second locking end (13b) protrudes out of the circuit breaker shell (1), and the second locking piece (1b) is limited by the closing button (20) and/or the opening button (21) and cannot retract into the circuit breaker shell (1); the switching-off button (21) is pressed to drive the operating mechanism to switch off the circuit breaker, the switching-on button (20) is moved towards the outer direction of the circuit breaker shell (1), and the switching-on button (20) and/or the switching-off button (21) drive the second locking piece (1b) to rotate, so that the second locking end (13b) retracts into the circuit breaker shell (1).

2. Plug-in circuit breaker according to claim 1, characterized in that: the closing button (20) comprises a closing button driving part (207) in driving fit with the second locking piece (1b), the opening button (21) comprises an opening button driving part (217) in driving fit with the second locking piece (1b), when the breaker is switched on, the switching-off button (21) drives the second locking piece (1b) to rotate through the switching-off button driving part (217) so that the second locking end (13b) protrudes out of the breaker shell (1), and the opening button driving part (217) is pressed against the second locking end (13b) to make the second locking end (13b) unable to retract into the breaker shell (1), when the breaker is opened, the closing button (20) drives the second locking piece (1b) to rotate through a closing button driving part (207), so that the second locking end (13b) retracts into the inner part of the shell (1) of the circuit breaker, and the closing button driving part (207) limits the second locking end (13b) to be kept in the breaker shell (1).

3. Plug-in circuit breaker according to claim 2, characterized in that: the second locking piece (1b) comprises a second locking piece mounting part (10b) which is pivotally connected with the shell (1) of the circuit breaker, a first locking piece driven part (11b) which is in driving fit with the closing button (20), a second locking piece driven part (12b) which is in driving fit with the opening button (21) and a second locking end (13 b); when the circuit breaker is switched on, the switching-off button (21) drives the second locking piece (1b) to rotate through the first driven part (11b) of the locking piece, so that the second locking end (13b) protrudes out of the shell (1) of the circuit breaker, and when the circuit breaker is switched off, the switching-on button (20) drives the second locking piece (1b) to rotate through the second driven part (12b) of the locking piece, so that the second locking piece (13b) retracts into the shell (1) of the circuit breaker.

4. A plug-in circuit breaker according to claim 3, characterized in that: the second locking piece (11b) is of an I-shaped structure, the second locking piece mounting portion (10b) and the first locking piece passive portion (11b) are located at one end of the second locking piece (1b) to form one transverse edge of the I-shaped structure, and the second locking piece passive portion (12b) and the second locking end (13b) are located at the other end of the second locking piece (1b) to form the other transverse edge of the I-shaped structure.

5. A plug-in circuit breaker according to claim 3, characterized in that: the first driven part (11b) of the locking piece comprises a first driven convex column (110b) of the locking piece protruding towards one side of the opening button (21), and the second driven part (12b) of the locking piece comprises a second driven convex column (120b) of the locking piece protruding towards one side of the closing button (20);

when the circuit breaker is switched on, one side surface of the switching-off button driving part (217) drives the second locking part (1b) to rotate through the first driven convex column (110b) of the locking part, so that the second locking end (13b) protrudes out of the shell (1) of the circuit breaker; when the circuit breaker is opened, one side surface of the closing button driving part (207) drives the second locking piece (1b) to rotate through the second driven convex column (120b) of the locking piece, so that the second locking end (13b) retracts into the interior of the circuit breaker shell (1).

6. Plug-in circuit breaker according to claim 5, characterized in that: the switching-on button driving part (207) comprises a switching-on button driving inclined plane (2070) in driving fit with the locking piece second driven convex column (120b), the switching-off button driving part (217) comprises a switching-off button driving inclined plane (21700) in driving fit with the locking piece first driven convex column (110b), the inclination directions of the switching-on button driving inclined plane (2070) and the switching-off button driving inclined plane (21700) are opposite, and the locking piece first driven convex column (110b) and the locking piece second driven convex column (120b) are located between the switching-off button driving inclined plane (21700) and the switching-on button driving inclined plane (2070);

when the closing button (20) is pressed to close the circuit breaker, the closing button driving inclined surface (2070) moves along with the closing button (20) to the inner direction of the circuit breaker shell (1) to avoid the second locking piece (1b), meanwhile, the opening button driving inclined surface (21700) moves along with the opening button (21) to the outer direction of the circuit breaker shell (1), the driving inclined surface (21700) drives the second locking piece (1b) to rotate through the first driven convex column (110b) of the locking piece, so that the second locking end (13b) protrudes out of the circuit breaker shell (1), and the driving inclined surface (21700) props against the first driven convex column (110b) of the locking piece to prevent the second locking piece (1b) from retracting into the circuit breaker shell (1);

when the opening button (21) is pressed to open the circuit breaker, the opening button driving inclined plane (21700) moves to the inner direction of the circuit breaker shell (1) along with the opening button (21) to avoid the second locking piece (1b), the closing button driving inclined plane (2070) moves to the outer direction of the circuit breaker shell (1) along with the closing button (20), the closing button driving inclined plane (2070) extrudes the second driven convex column (120b) of the locking piece to enable the second locking end (13b) to retract into the circuit breaker shell (1), and the closing button driving inclined plane (2070) limits the second locking piece (1b) to enable the second locking piece to be kept inside the circuit breaker shell (1).

7. Plug-in circuit breaker according to claim 1, characterized in that: the second locking piece (1b) is arranged in a stacking mode with a closing button (20) and an opening button (21) in the thickness direction of the circuit breaker.

8. Plug-in circuit breaker according to any one of claims 1 to 7, characterized in that: the locking mechanism further comprises a first locking piece (1a) with one end protruding outside the breaker shell (1);

when the circuit breaker is in a switching-off state, one end of a first locking piece (1a) protrudes out of a circuit breaker shell (1), the first locking piece (1a) can retract into the circuit breaker shell (1) under the action of retraction external force, the first locking piece (1a) retracts and then is in limit fit with a switching-on button (20) and/or a switching-off button (21), and the switching-on button (20) and/or the switching-off button (21) are locked to prevent the circuit breaker from being switched on; when the circuit breaker is in a closing state, the first locking piece (1a) protrudes out of the circuit breaker shell (1), and is limited by the closing button (20) and/or the opening button (21) and cannot retract into the circuit breaker shell (1).

9. Plug-in circuit breaker according to claim 8, characterized in that: the switching-on button (20) and/or the switching-off button (21) are/is provided with a button limiting groove (216) which is used for limiting and matching with the first locking part (1a), and the first locking part (1a) comprises a first locking part limiting table (14a) which is used for limiting and matching with the button limiting groove (216); when the circuit breaker is in a closing state, the button limiting groove (216) and the first locking piece limiting table (14a) are arranged in a staggered mode, and the closing button (20) and/or the opening button (21) prevent the first locking piece (1a) from moving towards the inner direction of the circuit breaker shell (1); when the circuit breaker is in the separating brake state, the button limiting groove (216) and the first locking part limiting table (14a) are arranged oppositely, the first locking part (1a) is subjected to indentation external force and can move towards the inner direction of the circuit breaker shell (1), and the first locking part limiting table (14a) slides into the button limiting groove (216) to lock the closing button (20) and/or the separating brake button (21).

10. Plug-in circuit breaker according to claim 8, characterized in that: still include release mechanism, release mechanism include with first locking member (1a) drive complex independent draw piece (2a), when the circuit breaker was in the separating brake state, first locking member (1a) one end was stretched out outside circuit breaker housing (1) from locking member trompil (17), and the pulling is drawn piece (2a) and can be driven first locking member (1a) and withdraw inside circuit breaker housing (1).