CN111489924B

CN111489924B - Plug-in circuit breaker

Info

Publication number: CN111489924B
Application number: CN201911121700.5A
Authority: CN
Inventors: 卢科军; 顾翔翼; 杨安; 朱俊; 郭绍军
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2025-08-05
Anticipated expiration: 2039-11-15
Also published as: CN111489924A

Abstract

A circuit breaker includes a housing, a button mechanism, and an operating mechanism. The button mechanism drives the operating mechanism to close/open the circuit breaker. The button mechanism has a closed position and an open position corresponding to the closed/open state of the circuit breaker. The housing is provided with a limit hole. The circuit breaker also includes a locking member arranged in the housing. The locking member is provided with a locking boss arranged corresponding to the limit hole. When the button mechanism is in the closed position, the locking boss of the locking member extends out of the housing. When retraction pressure is applied to the locking member to retract the locking boss into the housing, the locking member drives the button mechanism to drive the operating mechanism to open the circuit breaker. When the closed circuit breaker is inserted into the cabinet, the circuit breaker is forced to automatically open, avoiding live operation and improving safety.

Description

Plug-in circuit breaker

Technical Field

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

Background

With the rapid development of network communication technology, especially the application popularization of 5G network, the requirement for effectively improving the safety of electrical equipment of circuit breakers is higher and higher, the traditional power supply mode of connecting a plurality of sockets and plugboards under a terminal circuit breaker can not meet the requirements of safe power utilization and equipment protection, such as the terminal circuit breaker for 5G communication equipment, not only is the improvement in performance of miniaturization, intellectualization, reliability, stability and the like needed to be upgraded, but also a plurality of matched new structures are developed on the use requirement, for example, the circuit breaker is required to be conveniently plugged in and plugged out like a plug and can be locked at an installation position, and the novel plug-in circuit breaker is called as a plug-in circuit breaker, and can not only provide various safety protection performances of the circuit breaker for power utilization lines and electrical equipment, but also meet the requirements of different electrical equipment on the power quality, and can enable the circuit breaker to be conveniently plugged in and withdrawn.

The existing plug-in circuit breaker is generally provided with a locking device, and a locking protrusion of the locking device stretches out of a circuit breaker shell when the circuit breaker is in a closing state to prevent the circuit breaker from being inserted or pulled out in the closing state, but because a sheet metal structure of an installation cabinet body of the circuit breaker has certain elasticity, if the insertion or pulling-out force is large, the circuit breaker can still be caused to be inserted or pulled out of the installation cabinet in the closing state, and the risk of live operation exists.

Disclosure of Invention

The invention aims to provide a plug-in circuit breaker with high reliability.

In order to achieve the above purpose, the present invention adopts the following technical scheme.

The utility model provides a plug-in circuit breaker, includes casing, button mechanism and operating device, and button mechanism drive operating device carries out the combined floodgate/separating brake, and button mechanism has the combined floodgate position and the separating brake position corresponding with circuit breaker combined floodgate/separating brake state, is equipped with spacing hole on the casing, and this circuit breaker still includes the locking piece that sets up in the casing, the locking piece is equipped with the locking boss that corresponds the setting with spacing hole, and when button mechanism is located the combined floodgate position, the locking boss of locking piece stretches out outside the casing, when exerting the withdrawal pressure for the locking piece and make locking boss retract in the casing, locking piece drive button mechanism drives operating device separating brake.

Preferably, when the button mechanism is located at the opening position, the locking boss of the locking piece is retracted into the shell, and the locking piece is in abutting fit with the button mechanism to prevent the button mechanism from being switched from the opening position to the closing position.

Preferably, the locking member is mounted in the housing by a linear motion pair, and the direction of linear motion is perpendicular to the mounting insertion direction of the circuit breaker.

Preferably, when the button mechanism is located at the opening position, the locking boss of the locking piece extends out of the shell, and the locking boss of the locking piece can be pushed to retract into the shell by retraction external force.

Preferably, the locking piece comprises a locking boss matched with the limiting hole and an overhanging column matched with the button mechanism, wherein the upper part of the locking piece, which is close to the limiting hole, is provided with the locking boss, and the lower part of the locking piece, which is close to the button mechanism, is provided with the overhanging column.

Preferably, the button mechanism is provided with a locking piece driving part, when the button mechanism is in a closing position, the overhanging column of the locking piece corresponds to the locking piece driving part, when the locking boss of the locking piece is extruded and retracted into the circuit breaker, the overhanging column of the locking piece is contacted and pushes the locking piece driving part of the button mechanism to enable the button mechanism to act in a separating direction, so that the closed circuit breaker is automatically separated.

Preferably, the button mechanism is provided with a locking piece driving part, when the button mechanism is in the opening position, and when the locking boss of the locking piece is extruded to retract into the circuit breaker, the overhanging column of the locking piece moves to the closing direction of the locking piece driving part to be opposite to the locking piece driving part, and the button mechanism is limited to move towards the closing direction, so that the circuit breaker cannot complete closing action.

Preferably, the button mechanism comprises a button and a driving piece, the button is in driving connection with the driving piece through a connecting rod, the driving piece is arranged in a shell in a rotating manner and is in driving connection with the operating mechanism, a locking piece driving part is arranged on the driving piece, when the button mechanism is positioned at a closing position, an overhanging column of the locking piece corresponds to the locking piece driving part, and when a locking boss of the locking piece is extruded and retracted into the circuit breaker, the overhanging column of the locking piece is contacted and pushes the locking piece driving part of the button mechanism to enable the button mechanism to act towards a breaking direction, so that the circuit breaker which is closed automatically breaks a brake.

The button mechanism comprises a button and a driving piece, wherein the button is in driving connection with the driving piece through a connecting rod, the driving piece is arranged in a shell in a rotating mode and is in driving connection with an operating mechanism, a locking piece driving part is arranged on the driving piece, the button mechanism is located at a switching-off position, when a locking boss of the locking piece is extruded to retract into the circuit breaker, an overhanging column of the locking piece moves to be opposite to the locking piece driving part in a switching-on direction of the locking piece driving part, and the button mechanism is limited to act in the switching-on direction so that the circuit breaker cannot complete switching-on action.

Preferably, a spring is arranged between the locking piece and the shell, and the elastic force drives the locking boss of the locking piece to extend out of the shell.

Preferably, the lock release mechanism further comprises an unlocking piece, wherein the unlocking piece is used for driving the locking boss of the locking piece to retract into the shell when the button mechanism is in the opening position.

Preferably, when the button mechanism is in the opening position, the button mechanism is pulled outwards in a direction away from the circuit breaker, and the button mechanism drives the unlocking piece, so that the unlocking piece drives the locking boss of the locking piece to retract into the shell.

Preferably, the unlocking piece is rotatably arranged in the shell, a linkage end matched with the linkage unlocking part on the locking piece is arranged in the direction of the unlocking piece, the other end of the unlocking piece is a bending end, and the button mechanism drives the unlocking piece to drive the locking boss of the locking piece to retract into the shell through the bending end.

Preferably, the button mechanism comprises a button, a connecting rod and a driving part, the button is in driving connection with the driving part through the connecting rod, the driving part is in driving connection with the operating mechanism, the button comprises a button part for operation and an indicating part in the button part, the indicating part comprises a rotating shaft, a display end face and a driving boss arranged on the rotating shaft, an indicating part serving as an opening and closing sign is arranged on the display end face, a cavity type mounting hole is formed in the button part, an observation window communicated with the mounting hole is formed in the operation end face of the button part, the indicating part is arranged in the mounting hole of the button part through the rotating shaft and can swing around a shaft, the indicating part on the display end face is driven to move under the observation window and display a corresponding opening and closing state through the indicating part moving into the observation window, the driving boss exposes out of the button, a bending end corresponding to the bending direction of the bending end faces to one side of the driving boss of the indicating part, when the circuit breaker is closed, the button moves inwards to a shell, the driving boss and the indicating part rotates in a matching mode with the driving end, so that the indicating part on the display end face corresponds to the state, the indicator part and the circuit breaker is driven by the driving boss to be pulled to the bending end to be far away from the driving boss to the bending end, and the bending end is locked and pulled to the bending end.

Preferably, a left driven end b and a right driven end a are respectively arranged on a driving boss on a rotating shaft of the indicating piece, the bending end of the linkage piece is bent to one side of the button and is positioned between the left driven end b and the right driven end a, after the breaker is opened, the button is pulled in a direction away from the breaker, the right driven end a of the indicating piece is in driving fit with the bending end of the unlocking piece, and when the breaker is closed, the driven end b of the indicating piece is in fit with the bending end of the unlocking piece.

Preferably, the locking piece be close to the upper portion of spacing hole and be equipped with the locking boss, be equipped with overhanging post near button mechanism's lower part, one side of locking boss is equipped with the linkage unblock portion, the linkage unblock portion be the recess that sets up in locking piece and be close to unblock one side.

According to the plug-in circuit breaker, when the circuit breaker is switched on before installation, the button mechanism is positioned at the switching-on position, then the circuit breaker is inserted into the cabinet, and in the installation process, the cabinet sheet metal part extrudes the locking part to apply retraction pressure, so that the locking boss of the locking part is retracted into the shell, and meanwhile, the locking part drives the button mechanism to drive the operating mechanism to switch off, so that electrified operation is avoided, and safety is improved. The existing plug-in circuit breaker generally adopts a locking device to prevent the circuit breaker from being pulled out or inserted in a closing state in a limiting mode, the locking piece is creatively matched with the button mechanism in a driving mode, and when the circuit breaker is inserted in the closing state, the locking piece drives the button mechanism to open, so that the completely different technical schemes are adopted.

The locking piece can lock the button mechanism of the circuit breaker, when the circuit breaker is not correctly installed at the working position of the cabinet, the button mechanism cannot complete the closing action, and only when the circuit breaker is installed at the correct working position, the button mechanism can normally open and close.

Drawings

Fig. 1 is a schematic diagram of a break-in state structure of a plug-in circuit breaker according to the present invention.

Fig. 2 is a diagram of the process of loading a cabinet when the circuit breaker of the present invention is opened, while it is not yet installed in the cabinet operating position.

Fig. 3 is an enlarged partial schematic view of the fig. 2 state of the present invention.

Fig. 4 is an enlarged schematic view of a portion of the circuit breaker of the present invention closing prior to installation, i.e., to be installed in a cabinet.

Fig. 5 is a view of the circuit breaker of fig. 4 being installed in a cabinet, when not yet installed in a cabinet operating position, with the locking member moved downward to urge the driving member to rotate in a breaking direction.

Fig. 6 is an enlarged partial view showing an automatic opening operation state of the circuit breaker after the locking member 4 of fig. 5 triggers the driving member to rotate past the dead point.

Fig. 7 is a schematic diagram of related structures of an indicator, an unlocking member and a locking member of the button mechanism in a brake-separating state, and meanwhile, the indicator in the button member is driven by a bending end of the unlocking member to rotate and display brake separation.

Fig. 8 is an enlarged partial view showing the engagement of the indicator and the unlocking member in the opened state.

Fig. 9 is an enlarged partial schematic view of the engagement of the indicator and the unlocking member in the closed state.

Fig. 10 is a schematic view of the overall structure of the circuit breaker in the open state, with continued pulling of the push button mechanism, with the unlocking member retracting the locking member into the housing, allowing the circuit breaker to be removed from the cabinet.

Detailed Description

Embodiments of the plug-in circuit breaker of the present invention are further described below with reference to the examples given in connection with fig. 1 to 10. The plug-in circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the plug-in circuit breaker of the present invention includes a housing 6, a button mechanism, an operating mechanism 9 drivingly connected to the button mechanism, a moving contact connected to the operating mechanism 9, a fixed contact disposed opposite to the moving contact, and generally includes (but is not limited to) a short-circuit protection mechanism 11, an arc extinguishing device 12, an overload protection mechanism 14, an outgoing line connection device 13, an incoming line connection device 15, and other parts (not shown in the drawing) of the circuit breaker, where the button mechanism drives the operating mechanism 9 to drive the moving contact to contact with the fixed contact for switching on, or drives the operating mechanism 9 to drive the moving contact to separate from the fixed contact for switching off, and the button mechanism has a switching-on position and a switching-off position corresponding to a switching-on/off state of the circuit breaker.

The plug-in circuit breaker is further internally provided with a locking device, a limiting hole 61 matched with the locking device is formed in the shell 6, a cabinet limiting hole B0 (see fig. 2) is formed in a cabinet sheet metal part B of a receptor into which the plug-in circuit breaker is inserted, when the plug-in circuit breaker is installed to a working position, the limiting hole 61 of the plug-in circuit breaker corresponds to the cabinet limiting hole B0, when the plug-in circuit breaker is not installed to the working position, the limiting hole 61 of the plug-in circuit breaker is misplaced with the cabinet limiting hole B0, and the cabinet sheet metal part B can shield the cabinet limiting hole B0, which is the prior art in the field and is not repeated herein.

As shown in fig. 1, an embodiment of the plug-in circuit breaker of the present invention includes a housing 6 provided with a limit hole 61, a button mechanism and an operating mechanism 9, the button mechanism driving the operating mechanism 9 to perform switching on/off, the button mechanism having a switching on position and a switching off position corresponding to a switching on/off state of the circuit breaker. The button mechanism comprises a button 2, a connecting rod 7 and a driving piece 5, wherein the button 2 triggers the driving piece 5 to act through the connecting rod 7, the driving piece 5 is rotationally arranged in a shell 6 and is connected with an operating mechanism 9, the button 2 is pressed, the button 2 drives the driving piece 5 to rotate to one side through the connecting rod 7, the driving piece 5 drives the operating mechanism 9 through a U-shaped rod 8 to drive a moving contact 9a to contact with a fixed contact 9b to realize switching-on, the button 2 is pulled, the button 2 drives the driving piece 5 to rotate to the other side through the connecting rod 7, and the driving piece 5 drives the operating mechanism 9 through the U-shaped rod 8 to drive the moving contact 9a to separate from the fixed contact to realize switching-off. The function of the driving piece 5 is similar to that of a handle of a traditional miniature circuit breaker, the operating mechanism generally comprises a contact support, a lock catch and a trip button, which are connected with the moving contact 9a, the short-circuit protection mechanism 11 and the overload protection mechanism 14 are correspondingly arranged with the lock catch of the operating mechanism, and when short circuit or overload occurs, the short-circuit protection mechanism and the overload protection mechanism respectively act on the lock catch to trip the operating mechanism to enable the circuit breaker to be opened for protection.

The improvement point of the invention is that the circuit breaker further comprises a locking device matched with the limit hole 61, the locking device comprises a locking piece 4 arranged in the shell 6, the locking piece 4 is provided with a locking boss 41 arranged corresponding to the limit hole 61, the locking boss 41 can extend or retract the limit hole 61 from the limit hole 61 along with the installation state of the circuit breaker, the two working positions of extending and retracting the locking piece 4 are respectively realized, when the button mechanism is positioned at the closing position, the locking boss 41 of the locking piece 4 extends out of the shell 6, and when retracting pressure is applied to the locking piece 4 to enable the locking boss 41 to retract into the shell 6, the locking piece 4 drives the button mechanism to drive the operating mechanism 9 to break the brake.

As shown in fig. 4-6, when the circuit breaker is switched on before installation, the button mechanism is located at the switching-on position, and then the circuit breaker is inserted into the cabinet, in the installation process, the cabinet sheet metal part B extrudes the locking part 4 to apply retraction pressure, so that the locking boss 41 of the locking part 4 is retracted into the shell, and meanwhile, the locking part 4 drives the button mechanism to drive the operating mechanism 9 to switch off, thereby avoiding live-line operation and improving safety. The existing plug-in circuit breaker usually adopts a locking device to prevent the circuit breaker from being pulled out or inserted in a closing state in a limiting mode, the locking piece 4 is creatively matched with the button mechanism in a driving mode, and when the circuit breaker is inserted in the closing state, the locking piece 4 drives the button mechanism to break the switch, so that completely different technical schemes are adopted.

Further, as shown in fig. 2-3, when the button mechanism is located at the opening position, the locking boss 41 of the locking member 4 is retracted into the housing 6, the locking member 4 is in abutting fit with the button mechanism, the locking member 4 limits the button mechanism to drive the operating mechanism 9 to switch on towards the switching-on direction, so that the button mechanism is prevented from being switched from the opening position to the switching-on position, the plug-in circuit breaker cannot be switched on in the process of being installed at the working position in the cabinet, and the button 2 cannot be pressed in place, thereby avoiding live operation. In one scheme of the locking member 4, as long as the button mechanism is located at the opening position, the locking boss 41 of the locking member 4 is retracted into the housing 6, so that the circuit breaker can be normally inserted into and removed from the cabinet. As another preferable solution of the locking member 4, when the button mechanism is located at the opening position, the locking boss 41 of the locking member 4 extends out of the housing 6, and the locking boss 41 of the locking member 4 can be pushed by a retraction external force to retract into the housing 6 (only horizontal force is not needed to retract the locking member 4, and a vertical component force in a retraction direction is needed), that is, the circuit breaker is not prevented from being inserted into the cabinet in the opening state, and the circuit breaker can be protected from falling out of the cabinet due to shock during transportation and the like.

In the preferred embodiment shown in fig. 1, the locking member 4 includes a locking boss 41 cooperating with the limiting hole 61 and an overhanging column 42 cooperating with the button mechanism, and the locking member 4 is provided with the locking boss 41 near the upper portion of the limiting hole 61 and the overhanging column 42 near the lower portion of the button mechanism. The push button mechanism is provided with a locking piece driving part 51, when the push button mechanism is in a closing position, the overhanging column 42 of the locking piece 4 corresponds to the locking piece driving part 51, when the closed circuit breaker is inserted into a cabinet, when the locking boss 41 of the locking piece 4 is extruded and retracted into the circuit breaker when being installed into the cabinet, the overhanging column 42 of the locking piece 4 is pressed and contacted on the locking piece driving part 51 of the push button mechanism by the downward movement of the locking piece 4, and the locking piece driving part 51 of the push button mechanism is contacted and pushed to enable the push button mechanism to act in a separating direction, so that the closed circuit breaker is automatically separated. When the button mechanism is in the opening position, the circuit breaker is inserted into the cabinet, when the circuit breaker is not installed at the working position of the cabinet, the locking boss 41 of the locking piece 4 is extruded and retracted into the circuit breaker, the overhanging column 42 of the locking piece 4 moves to be opposite to the locking piece driving part 51 of the button mechanism in the closing direction of the locking piece driving part 51, and the overhanging column 42 is abutted against the locking piece driving part 51 in the closing direction of the button mechanism, so that the circuit breaker cannot complete the closing action due to the fact that the action of the button mechanism in the closing direction is limited.

Preferably, the button mechanism comprises a button 2 and a driving piece 5, the button 2 is in driving connection with the driving piece 5 through a connecting rod 7, the driving piece 5 is rotatably arranged in a shell 6 and in driving connection with an operating mechanism 9, and the locking piece driving part 51 is arranged on the driving piece 5. Preferably, the locking member driving part 51 is a slope surface provided on the outer side wall of the driving member 5. When the button mechanism is at the closing position, the overhanging column 42 of the locking piece 4 corresponds to the locking piece driving part 51, and when the locking boss 41 of the locking piece 4 is extruded and retracted into the circuit breaker, the overhanging column 42 of the locking piece 4 is contacted and pushes the locking piece driving part 51 of the button mechanism to enable the button mechanism to act in the opening direction, so that the closed circuit breaker is automatically opened. When the locking boss 41 of the locking piece 4 is extruded and retracted into the circuit breaker, the overhanging column 42 of the locking piece 4 moves to be opposite to the locking piece driving part 51 in the closing direction of the locking piece driving part 51, and the button mechanism is limited to act in the closing direction, so that the circuit breaker cannot complete closing action.

Specifically, as shown in fig. 4-5, when the circuit breaker is switched on before being installed, the button mechanism and the driving member 5 are both in their switching-on positions, and then are installed in the cabinet body, the locking boss 41 of the locking member 4 is pressed into the circuit breaker by the cabinet body, the overhanging column 42 of the locking member 4 is driven to move towards the inside of the circuit breaker, and contacts and pushes the locking member driving part 51 on the driving member 5 in the switching-on position to rotate in a direction opposite to the switching-on rotation direction. Fig. 6 is an enlarged partial view of the structure of the actuating mechanism for opening the brake after the driving member 5 in fig. 4 and 5 is rotated past the dead point. As shown in fig. 6, the driving member 5 continues to rotate to the opening direction to the dead point position where the U-shaped rod 8 is separated from the operating mechanism under the action of the spring force (the spring of the driving member, not shown in the drawing), and the driving member 5 is completely separated from the closing position only after the overhanging post 42 of the locking member 4 is separated from the locking member driving portion 51 of the driving member 5 and the driving member 5 of the circuit breaker continues to be pushed by the spring force to rotate to the dead point position where the U-shaped rod 8 is separated from the operating mechanism, so that the operating mechanism 9 can realize the opening action to ensure that the circuit breaker is inserted in the opening state. In other words, the button mechanism is allowed to complete the closing action only when the circuit breaker is inserted to its correct installation position and in the open state.

When the circuit breaker is not mounted to the working position, as shown in fig. 2-3, the locking boss 41 is changed from the extended state to the state of being pressed into the circuit breaker by the cabinet as shown in fig. 3, if the button 2 of the circuit breaker is pressed at this time, and the locking piece driving part 51 on which the driving piece 5 rotates is pressed by the overhanging column 42 on the locking piece 4 to achieve the interference contact, the driving piece 5 is resisted by the overhanging column 42 and cannot continue to rotate to the closing position of the operating mechanism 9, because the rotation angle of the driving piece 5 is smaller than the rotation angle required for enabling the operating mechanism 9 to reach the closing position, so that the button mechanism cannot complete the closing stroke, and the circuit breaker cannot complete the closing operation. Even if the driving member 5 is deviated in the closing direction at this time, the overhanging column 42 of the locking member 4 contacts the locking member driving portion 51 of the driving member 5 to form an abutting press and push the driving member 5 to rotate only in the opening direction, thereby restricting the driving member 5 from continuing to rotate to the closing position of the operating mechanism 9.

In this embodiment, the locking piece 4 is matched with the driving piece 5, the driving part 51 of the locking piece is arranged on the driving piece 5, when the circuit breaker is switched on and installed, the locking piece 4 can trigger the rotation of the driving piece 5 to enable the circuit breaker to be switched from a switching-on state to a switching-off state, and in the installation process, the rotation of the driving piece 5 can be limited, so that the circuit breaker cannot be switched from the switching-off state to the switching-on state. Of course, the locking member driving part 51 may be provided on the button 2 or the link 7, and the locking member 4 may be engaged with the button 2 or the link 7, and the locking member driving part 51 may be a boss or a slot provided on the button 2, or may be a hook extending from the link 7. For example, when the button mechanism is positioned at the switching-on position, the locking boss 41 of the locking piece 4 is extruded and retracted into the circuit breaker, the overhanging column 42 rotates the boss or the clamping groove on the driving button 2 to enable the button 2 to move towards the switching-off direction, so that the switched-on circuit breaker can be switched off automatically, and when the locking boss 41 of the locking piece 4 is extruded and retracted into the circuit breaker, the button mechanism is positioned at the switching-off position and is in limit fit with the boss or the clamping groove on the button 2, so that the action of the button mechanism towards the switching-on direction is prevented, and the circuit breaker can not complete the switching-on action.

It can be seen that one feature of the present invention is that when the circuit breaker is not mounted at the operating position or the circuit breaker is in the closing state, the overhanging column 42 on the locking member 4 and the locking member driving portion 51 of the driving member 5 are mutually pressed to form a resisting limit for the driving member 5, so that although the circuit breaker can perform the insertion action, the button mechanism can be ensured not to press the closing action or the circuit breaker which is closed can be automatically opened during the insertion process, and the driving member 5 of the operating mechanism can be unlocked only after the driving member 5 rotates past the dead point, thereby avoiding the live insertion of the circuit breaker in the closing state.

As shown in fig. 1 and 10, the locking piece 4 is provided with a locking boss 41 near the upper part of the limiting hole 61, and an overhanging column 42 near the lower part of the button mechanism. Preferably, the locking member 4 is mounted in the housing 6 through a linear moving pair, and the direction of linear movement is perpendicular to the mounting and inserting direction of the circuit breaker, and since the locking member 4 moves linearly along the direction perpendicular to the mounting and inserting direction a, the stress deformation and/or micro-displacement of the locking member 4 and the cabinet sheet metal part inserted into the receptor can be effectively prevented or reduced. The casing 6 on be equipped with the locking piece groove of installation locking piece 4, locking piece 4 and locking piece groove sliding fit, locking piece 4 set up between button mechanism and spacing hole 61 be provided with the elastic component between locking piece 4 and the casing 6, the elastic component is spring 10, its elasticity drives the locking boss 41 of locking piece 4 to stretch out outside casing 6, as shown in FIG. 7, spring 10 acts on the downside of locking piece 4, when the circuit breaker is in rack working position, locking boss 41 stretches out outside casing 6, locking boss 41 resists with the lateral wall of rack spacing hole B0 and prevents the circuit breaker from shifting out in the direction that the circuit breaker shifts out the rack. Preferably, the section of the locking boss 41 of the locking member 4 is a right trapezoid or a right triangle, the locking boss 41 includes a straight surface perpendicular to the side wall of the limiting hole 61 and an inclined surface, the straight surface faces the direction in which the breaker is pulled out of the cabinet, and the inclined surface faces the direction in which the breaker is inserted into the cabinet, so that the breaker is effectively prevented from moving out, and the insertion of the breaker in the opening state is not hindered.

Further preferably, the circuit breaker further includes an unlocking member 3, when the button mechanism is in the closing position, the locking member 4 corresponds to the locking member driving part 51 of the button mechanism, and is in interference fit with each other, when the button mechanism is in the opening position, the locking member 4 is released from interference with the button mechanism, the unlocking member 3 is used for driving the locking boss 41 of the locking member 4 to retract into the casing, and when the circuit breaker is in the cabinet working position, the circuit breaker can be pulled out from the cabinet. In a preferred embodiment, the unlocking member 3 is driven by the push button mechanism to retract the locking boss 41 of the locking member 4 into the housing, and when the push button mechanism is in the opening position, the push button mechanism is pulled outward in a direction away from the circuit breaker, and the unlocking member 3 is driven by the push button mechanism to retract the locking boss 41 of the locking member 4 into the housing.

As shown in fig. 1 and 10, the unlocking member 3 is rotatably disposed in the housing 6, a linkage end 31 that is matched with a linkage unlocking portion 43 on the locking member 4 is disposed in the direction of the unlocking member 3 pointing to the locking member 4, the linkage unlocking portion 43 is a groove disposed on one side of the locking member 4 near the unlocking member 3, the linkage end 31 is inserted into the groove of the linkage unlocking portion 43, the linkage end 31 is disposed in the linkage unlocking portion 43 on the locking member 4 and can overlap with the linkage unlocking portion 43, a bending end 32 is disposed at the other end of the unlocking member 3, and the button mechanism drives the unlocking member 3 to drive the locking member 4 to retract through the bending end 32.

Specifically, the button mechanism includes button 2, driving piece 5, and this embodiment drives the end 32 of bending of unblock 3 through button 2, button 2 sets up in unblock 3 below, and driving piece 5 sets up in locking piece 4 below, and locking piece 4 is located unblock 3 right side, the directional locking piece 4 direction of unblock 3 is equipped with the linkage end 31 of extension, linkage end 31 sets up in the recess of linkage unblock 43 on the locking piece. The upper portion that the locking piece 4 is close to spacing hole 61 be equipped with locking boss 41, be close to button mechanism's lower part and be equipped with overhanging column 42, one side of locking boss 41 is equipped with linkage unblock portion 43, be equipped with on the linkage unblock portion 43 with the complex recess of the linkage end 31 of unlocking piece 3, of course also can not adopt the recess, and adopt the cooperation mode of breach step, adopt the recess to make when locking piece 4 receives the pressure withdrawal of rack, the top surface of recess makes unlocking piece 3 rotatory, bending end 32 perk clockwise, give boss 222 of button to step down, button 2 can outwards remove, the circuit breaker back of breaking the floodgate, outwards pulling button, unlocking piece 3 clockwise rotation, the bottom surface of downward pressing recess of linkage end 31 makes locking piece 4 withdraw. When the button mechanism is in the opening position, the button 2 is pulled outwards in a direction away from the circuit breaker, the unlocking piece 3 is rotated clockwise by the button 2 through the bending end 32, and the linkage end 31 drives the locking piece 4 to retract into the shell against the elastic force of the elastic piece through the linkage unlocking part 43.

As another embodiment of the present invention, the locking member 4 and the unlocking member 3 may be an integral structure, the integral structure is rotatably installed in the housing 6, one end of the unlocking member 3 is provided with a bent end 32 matched with the button mechanism, the locking member 4 is provided with a locking boss 41 and an overhanging column 42, when the integral structure is driven to rotate by an elastic member, the locking boss 41 extends out of the limiting hole 61, and the elastic member may be a compression spring, a torsion spring or a leaf spring.

One solution is that a driving protrusion or a groove matched with the bending end 32 is arranged on the button 2, and the bending end 32 of the unlocking piece 3 is pulled. As a preferred embodiment, the button 2 of the button mechanism comprises a button piece 21 and an indicator piece 22, and the indicator piece 22 is matched with the unlocking piece 3 to simultaneously realize the opening and closing indication and drive the locking boss 41 of the locking piece 4 to retract into the shell 6.

The indicator 22 comprises a rotating shaft 221, a display end surface 223 and a driving boss 222 arranged on the rotating shaft 221, an indicator part serving as an opening and closing mark is arranged on the display end surface 223, a corresponding color block or character serving as the opening and closing mark is arranged on the indicator part, a cavity type mounting hole 211 is arranged in the button 21, an observation window 212 communicated with the mounting hole 211 is arranged on the operation end surface of the button 21, the indicator 22 is arranged in the mounting hole 211 of the button 21 through the rotating shaft 22 and can swing around the shaft, the indicator part on the display end surface 223 is driven to move under the observation window 212, a corresponding opening and closing state is displayed through the indicator part moving into the observation window 212, the driving boss 222 is exposed out of the button 21, a corresponding bending end 32 is arranged on the unlocking piece 3, the bending direction of the bending end 32 faces to one side of the driving boss 222 of the indicator 22, when the breaker is closed, the button 2 moves into the shell 6, the driving boss 222 is matched with the bending end 32 to enable the indicator 22 to rotate, the indicator 22 is enabled to enable the indicator part on the display end surface to move under the condition corresponding to the observation window 212, the indicator part is enabled to move to the indicator part corresponding to the observation window 212, the indicator 2 is enabled to be pulled to be far away from the bending end 32, and the driving end 4 is enabled to be locked to be far away from the driving end 4, and the driving boss 2 is pulled to be locked to be far away from the bending end 4, and the actuator 4 is enabled to be locked to be retracted, and pulled into the driving end 32 is far towards the driver 4.

As shown in fig. 8-9, the driving boss 222 on the rotating shaft 221 of the indicator 22 is provided with a left driven end 222b and a right driven end 222a, and the bent end 32 of the linkage 3 is bent toward the button 2 and is located between the left driven end 222b and the right driven end 222 a. As shown in fig. 9, when the button 2 performs a closing operation to the inside of the circuit breaker, the inclined surface of the left driven end 222b of the indicator 22 contacts the bent end 32 of the unlocking member 3 and is subject to the resistance of the bent end 32 of the unlocking member 3, so that the operator can see the area of the indicator corresponding to the closing state in the observation window 212, and the color mark representing closing corresponding to the opening and closing mark displayed by the indicator at this time. As shown in fig. 8, when the button 2 is pulled away from the breaker to perform the opening operation, the bending end 32 is located between the left driven end 222b and the right driven end 222a, the inner inclined surface of the right driven end 222a touches the right side of the bending end 32, so that the indicator rotates clockwise around the rotating shaft due to the force, the indicator in the button 21 is driven by the bending end 32 of the unlocking member 3 to rotate and display the opening, the area of the indicator corresponding to the opening state can be seen in the observation window 212, and the color mark representing the opening corresponding to the opening mark displayed by the indicator at the moment. After the breaker is opened, when the breaker needs to be disassembled from the installation cabinet, as shown in fig. 10, when the breaker is in an opened state, the button 2 is continuously pulled in a direction away from the breaker, so that the right driven end 222a of the indicator 22 acts on the lower end face of the bending end 32 of the unlocking member 3, the unlocking member 3 is forced to rotate clockwise around the shaft to drive the extension end 31 to act on the linkage unlocking part 43 of the locking member 4, the locking boss 41 of the locking member 4 is retracted into the breaker, and the breaker can be safely disassembled from the cabinet working position.

The plug-in circuit breaker of the invention skillfully solves the problems in the prior art, the locking piece 4 is a double locking device, the simplified structural design that the closing can not be realized is adopted to replace the structural design that the locking piece can not be retracted and can not be inserted through the extension of the locking piece, and the protection device not only can realize double protection functions at the same time, but also can realize more reliable protection. The locking piece 4 has two working positions of extension and retraction and mainly has the following locking protection functions:

first, when the circuit breaker is in a closing state before installation, the locking piece 4 touches and forcedly pushes the button mechanism, so that the circuit breaker can be automatically opened.

Second, when the circuit breaker is not correctly installed at the working position of the cabinet, the locking piece 4 limits the button mechanism when the locking boss 41 is retracted into the casing 6 by the extrusion force exerted by the cabinet, so that the circuit breaker cannot be forced to complete closing.

Third, when the circuit breaker is mounted at the correct working position of the cabinet and is in the closing working state, the locking boss 41 of the locking piece 4 extends out of the limit hole 61 to lock the circuit breaker at the working position, so as to prevent the closing from being pulled out.

Fourth, when the circuit breaker is in the open state, the locking boss 41 of the locking member 4 extends out of the limiting hole 61, so as to prevent the circuit breaker from falling out of the cabinet due to shock during transportation and the like.

Fifth, when the circuit breaker is in the opening state, the button mechanism is pulled, and the unlocking piece 3 drives the locking piece 4 to enable the locking boss 41 to retract into the shell 6, so that the circuit breaker can be easily inserted and pulled out.

Sixth, the unlocking piece 3 cooperates with the indicating piece 22 in the button 2 at the same time, so that the indicating piece plays a role in indicating the opening and closing state of the circuit breaker.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. The plug-in circuit breaker comprises a shell (6), a button mechanism and an operating mechanism (9), wherein the button mechanism drives the operating mechanism (9) to execute switching-on/switching-off, the button mechanism is provided with a switching-on position and a switching-off position corresponding to the switching-on/switching-off state of the circuit breaker, and a limiting hole (61) is formed in the shell (6), the plug-in circuit breaker is characterized in that the circuit breaker further comprises a locking piece (4) arranged in the shell (6), the locking piece (4) is provided with a locking boss (41) corresponding to the limiting hole (61), when the button mechanism is located at the switching-on position, the locking boss (41) of the locking piece (4) stretches out of the shell (6), and when retracting pressure is applied to the locking piece (4) to enable the locking boss (41) to retract into the shell (6), the locking piece (4) drives the button mechanism to drive the operating mechanism (9) to switch off.

2. The circuit breaker according to claim 1, wherein the locking member (4) is adapted to be engaged with the push button mechanism when the push button mechanism is in the open position and the locking boss (41) of the locking member (4) is pressed to be retracted into the housing (6), thereby preventing the push button mechanism from being switched from the open position to the closed position.

3. The plug-in circuit breaker according to claim 1, characterized in that the locking element (4) is mounted in a housing (6) in a linearly movable manner, the direction of which is perpendicular to the mounting insertion direction of the circuit breaker.

4. The plug-in circuit breaker according to claim 1, wherein the locking boss (41) of the locking member (4) protrudes out of the housing (6) when the button mechanism is in the opening position, and the locking boss (41) of the locking member (4) can be pushed to retract into the housing (6) by a retracting external force.

5. The plug-in circuit breaker according to claim 1, wherein the locking member (4) comprises a locking boss (41) matched with the limiting hole (61) and an overhanging column (42) matched with the button mechanism, the locking boss (41) is arranged at the upper part of the locking member (4) close to the limiting hole (61), and the overhanging column (42) is arranged at the lower part of the locking member close to the button mechanism.

6. The plug-in circuit breaker according to claim 5, wherein the push button mechanism is provided with a locking piece driving part (51), when the push button mechanism is in a closing position, the overhanging column (42) of the locking piece (4) corresponds to the locking piece driving part (51), and when the locking boss (41) of the locking piece (4) is extruded and retracted into the circuit breaker, the overhanging column (42) of the locking piece (4) is contacted and pushes the locking piece driving part (51) of the push button mechanism to enable the push button mechanism to act in a separating direction, so that the closed circuit breaker is automatically separated.

7. The plug-in circuit breaker according to claim 5, wherein the push button mechanism is provided with a locking piece driving part (51), and when the push button mechanism is in the opening position, and the locking boss (41) of the locking piece (4) is extruded and retracted into the circuit breaker, the overhanging column (42) of the locking piece (4) moves to be opposite to the locking piece driving part (51) in the closing direction of the locking piece driving part (51), and the push button mechanism is limited to move towards the closing direction, so that the circuit breaker cannot complete the closing action.

8. The plug-in circuit breaker according to claim 5, wherein the button mechanism comprises a button (2) and a driving piece (5), the button (2) is in driving connection with the driving piece (5) through a connecting rod (7), the driving piece (5) is rotatably arranged in a shell (6) and is in driving connection with an operating mechanism (9), a locking piece driving part (51) is arranged on the driving piece (5), when the button mechanism is positioned at a closing position, an overhanging column (42) of the locking piece (4) corresponds to the locking piece driving part (51), and when a locking boss (41) of the locking piece (4) is extruded and retracted into the circuit breaker, the overhanging column (42) of the locking piece (4) is contacted and pushes the locking piece driving part (51) of the button mechanism to enable the button mechanism to act in a separating direction, so that the closed circuit breaker is automatically separated.

9. The plug-in circuit breaker according to claim 5, wherein the button mechanism comprises a button (2) and a driving piece (5), the button (2) is in driving connection with the driving piece (5) through a connecting rod (7), the driving piece (5) is rotatably arranged in a shell (6) and is in driving connection with an operating mechanism (9), a locking piece driving part (51) is arranged on the driving piece (5), the button mechanism is located at a switching-off position, when a locking boss (41) of the locking piece (4) is extruded and retracted into the circuit breaker, an overhanging column (42) of the locking piece (4) is moved to be opposite to the locking piece driving part (51) in a switching-on direction of the locking piece driving part (51), and the button mechanism is limited to act in the switching-on direction so that the circuit breaker cannot complete switching-on actions.

10. The plug-in circuit breaker according to claim 1, characterized in that a spring (10) is arranged between the locking element (4) and the housing (6), the spring force of which forces the locking boss (41) of the locking element (4) to protrude outside the housing (6).

11. The plug-in circuit breaker according to claim 1, further comprising an unlocking member (3), wherein the unlocking member (3) is adapted to drive the locking boss (41) of the locking member (4) to retract inside the housing when the push button mechanism is in the opening position.

12. The plug-in circuit breaker according to claim 11, wherein when the push button mechanism is in the off position, the push button mechanism is pulled outwardly away from the circuit breaker, the push button mechanism drives the unlocking member (3) such that the unlocking member (3) drives the locking boss (41) of the locking member (4) to retract inside the housing.

13. The plug-in circuit breaker according to claim 12, wherein the unlocking piece (3) is rotatably arranged in the shell (6), a linkage end (31) matched with a linkage unlocking part (43) on the locking piece (4) is arranged in the direction of the unlocking piece (3) pointing to the locking piece (4), the other end of the unlocking piece (3) is a bending end (32), and the button mechanism drives the unlocking piece (3) to drive a locking boss (41) of the locking piece (4) to retract into the shell through the bending end (32).

14. The plug-in circuit breaker according to claim 13, wherein the button mechanism comprises a button (2), a connecting rod (7) and a driving part (5), the button (2) is in driving connection with the driving part (5) through the connecting rod (7), the driving part (5) is in driving connection with the operating mechanism (9), the button (2) comprises a button part (21) for operation and an indicating part (22) in the button part (21), the indicating part (22) comprises a rotating shaft (221), a display end surface (223) and a driving boss (222) arranged on the rotating shaft (221), an indicating part serving as a switching-on and switching-off mark is arranged on the display end surface (223), a cavity type mounting hole (211) is arranged in the button part (21), an observation window (212) communicated with the mounting hole (211) is arranged on the operation end surface of the button part (21), the indicating part (22) is arranged in the mounting hole (211) of the button part (21) through the rotating shaft (221) and can swing around the shaft, the indicating part (22) on the swinging driving the display end surface (223) moves under the observation window (212), the indicating part (212) is correspondingly moved to the outside the display end (32) through the corresponding to the opening and closing state (32), the bending direction of the bending end (32) faces one side of a driving protrusion (222) of the indicating piece (22), when the circuit breaker is closed, the button (2) moves into the shell (6), the driving boss (222) is matched with the bending end (32) to enable the indicating piece (22) to rotate, the area of the indication part on the display end surface (223) corresponding to the closing state corresponds to the observation window (212), after the circuit breaker is opened, the button (2) pulls in a direction away from the circuit breaker, the driving boss (222) drives the linkage piece (3) to rotate through the bending end (32), and the extending end (31) applies force to the locking piece (4) to enable the locking boss (41) to retract into the shell.

15. The plug-in circuit breaker according to claim 14, wherein a left receiving end (222 b) and a right receiving end (222 a) are respectively arranged on a driving boss (222) on a rotating shaft (221) of the indicating piece (22), a bending end (32) of the linkage piece (3) is bent towards one side of the button (2) and positioned between the left receiving end (222 b) and the right receiving end (222 a), after the circuit breaker is opened, the button (2) is pulled towards a direction far away from the circuit breaker, the right receiving end (222 a) of the indicating piece (22) is in driving fit with the bending end (32) of the unlocking piece (3), and when the circuit breaker is closed, the receiving end (222 b) of the indicating piece (22) is in fit with the bending end (32) of the unlocking piece (3).

16. The plug-in circuit breaker according to claim 13, wherein the locking piece (4) is provided with a locking boss (41) near the upper part of the limiting hole (61), the lower part near the button mechanism is provided with an overhanging column (42), one side of the locking boss (41) is provided with a linkage unlocking part (43), and the linkage unlocking part (43) is a groove arranged on one side of the locking piece (4) near the unlocking piece (3).