CN222995339U - Circuit breaker - Google Patents

Abstract

The utility model relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker, wherein an operating member switches between a closing position and an opening position and drives a moving contact mechanism to switch between a closing position and an opening position through an electromagnetic system, and the electromagnetic system is energized to work and drives the moving contact mechanism to switch between a closing position and an opening position through a push rod; the second locking member comprises a second locking protrusion; when the operating member moves from the opening position to the closing position, the second locking member is directly or indirectly driven by the operating member to rotate forward so that the second locking protrusion moves toward the outside of a shell; when the operating member moves from the closing position to the opening position, the second locking member rotates reversely so that the second locking protrusion moves toward the inside of the shell; when the operating member is in the closing position, the operating member directly or indirectly cooperates with the second locking member to prevent it from rotating reversely; the circuit breaker has a simple structure, occupies a small space and has good safety.

Description

Circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a circuit breaker.

Background

The basic structure of the existing circuit breaker, in particular to an intelligent circuit breaker, generally comprises a short-circuit protection module, an overload protection module, an operating mechanism and an electric operation module, wherein the short-circuit protection module and the overload protection module are generally arranged according to different current specifications of the circuit breaker, the electric operation module realizes remote operation in a mode of matching a motor and a gear, the operating mechanism of the existing circuit breaker is complex in structure and large in occupied space, and the existing circuit breaker lacks a structure for preventing the circuit breaker from being pulled out of a circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electric cabinets) in a closing state. Furthermore, existing circuit breakers lack a structure that avoids the circuit breaker being installed into a circuit breaker installation cabinet (e.g., a power distribution cabinet, a control cabinet, or other electrical cabinet) in a closed state.

Disclosure of Invention

The utility model aims to overcome at least one defect in the prior art and provides a circuit breaker which is simple in structure, small in occupied space and good in safety.

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

The circuit breaker comprises a shell, an operating piece, an electromagnetic system and a moving contact mechanism, wherein the operating piece is arranged on the shell in a sliding manner, the electromagnetic system and the moving contact mechanism are respectively arranged in the shell, the electromagnetic system comprises a magnetic generating component and a push rod which is movably inserted in the middle of the magnetic generating component, one end of the push rod is matched with the operating piece, and the other end of the push rod is in transmission fit with the moving contact mechanism;

The circuit breaker further comprises a second locking piece rotatably arranged in the shell, the second locking piece comprises a second locking protrusion, when the operating piece moves from the opening position to the closing position, the second locking piece is directly or indirectly driven by the operating piece to rotate forward so that the second locking protrusion moves to the outside of the shell, when the operating piece moves from the closing position to the opening position, the second locking piece reversely rotates so that the second locking protrusion moves to the inside of the shell, and when the operating piece is in the closing position, the operating piece is directly or indirectly matched with the second locking piece in a limiting mode so as to prevent the second locking protrusion from reversely rotating.

The circuit breaker further comprises a front connecting rod which is connected with the operating piece and synchronously moves, two ends of the ejector rod are respectively connected with the front connecting rod and the moving contact mechanism in a transmission mode, when the operating piece moves from a switching-on position to a switching-off position, the second locking piece is driven by the front connecting rod to positively rotate so that the second locking protrusion moves to the outside of the shell, when the operating piece moves from the switching-on position to the switching-off position, the second locking piece reversely rotates so that the second locking protrusion moves to the inside of the shell, and when the operating piece moves from the switching-on position, the front connecting rod is in limiting fit with the second locking piece so as to prevent the second locking protrusion from reversely rotating.

Further, the operating piece is switched between a closing position and a separating position to drive the ejector rod to be switched between a first position and a second position, and the ejector rod is switched between the first position and the second position to drive the moving contact mechanism to be switched between a closing position and an opening position.

Further, the operating piece and the front connecting rod are of an integrated or split structure.

Further, the second locking piece further comprises a second locking piece installation part and a second locking piece front arm, the second locking piece is rotatably arranged on the shell through the second locking piece installation part, one end of the second locking piece front arm is connected with the second locking piece installation part, a second locking protrusion is arranged at the other end of the second locking piece front arm, and when the circuit breaker is closed, the second locking piece front arm is driven by the front connecting rod to enable the second locking piece to rotate positively.

Further, the second locking piece further comprises a second locking piece matching part arranged on the front arm of the second locking piece, the second locking piece matching part and the second locking protrusion are respectively arranged on two sides of the front arm of the second locking piece, and when the circuit breaker is closed, the second locking piece matching part is pressed by the front connecting rod to enable the second locking piece to rotate positively.

Further, when the operating member moves from the closing position to the opening position, the second locking member is driven by the front connecting rod to reversely rotate so that the second locking protrusion moves into the shell.

Further, the second locking piece further comprises a second locking piece rear arm, one end of the second locking piece rear arm is connected with the second locking piece installation part, and the other end of the second locking piece rear arm is in transmission fit with the front connecting rod.

The circuit breaker further comprises a first locking piece and a first locking piece reset spring, wherein the first locking piece and the first locking piece reset spring are slidably arranged in the shell, the first locking piece reset spring acts on the first locking piece to enable the first locking piece to have a trend of moving towards the outside of the shell, a first locking protrusion of the first locking piece protrudes out of the shell, the first locking piece moves towards the inside of the shell when the first locking protrusion is extruded by external force, the first locking piece is driven by an operating piece pulled at a breaking position to move towards the inside of the shell, the second locking piece is driven by the operating piece pulled at the breaking position to reversely rotate, and the first locking piece is driven by a second locking piece reversely rotated to move towards the inside of the shell when the operating piece at the breaking position is pulled.

The first locking piece comprises a first locking piece driven part, and the first locking piece driven part is pressed by the back arm of the second locking piece which reversely rotates to drive the first locking piece to move towards the inside of the shell.

The electromagnetic system further comprises a movable iron core which is arranged in the middle of the coil assembly in a sliding mode, the movable iron core is connected with the ejector rod and is arranged in a synchronous moving mode, two ends of the ejector rod protrude out of two axial sides of the coil assembly respectively, the electromagnetic system further comprises a first static iron core and a second static iron core which are arranged in an opposite mode in the axial direction of the coil assembly, the ejector rod is arranged at a first position when one end of the movable iron core is attracted with the first static iron core, and the ejector rod is arranged at a second position when the movable iron core is attracted with the second static iron core.

The circuit breaker disclosed by the utility model has the advantages that the manual opening and closing actions are realized by driving the moving contact mechanism to move through the ejector rod of the electromagnetic system, the electromagnetic system is electrically operated by driving the moving contact mechanism to move through the ejector rod, the structure is simple, the occupied space is small, the operation transmission link is short, the reliability is good, in addition, the second locking piece is used for preventing the circuit breaker from being installed in the circuit breaker installation cabinet in a closing state, and the personal safety of operators is ensured, and the safety is good.

In addition, the first locking piece prevents the circuit breaker from being pulled out of the circuit breaker installation cabinet in a closing state, so that personal safety of operators is guaranteed, and electrical continuity, stability and reliability are guaranteed.

In addition, the front connecting rod can unlock the second locking piece directly, and can unlock the first locking piece through the second locking piece, so that the structure of the circuit breaker is simplified.

Drawings

Fig. 1 is a schematic structural view of the circuit breaker of the present utility model, at least showing the structure of a case;

fig. 2 is a projection view of the circuit breaker of the present utility model, showing the structure of the operating system of the first embodiment;

FIG. 3 is a schematic diagram of an operating system according to a first embodiment of the present utility model;

FIG. 4 is an exploded view of the operating system of the first embodiment of the present utility model;

FIG. 5 is a cross-sectional view of the operating system of the first embodiment of the present utility model, showing the process of the operating system of the first embodiment performing a closing operation;

Fig. 6 is a projection view of the circuit breaker of the present utility model, showing the structure of the operating system of the second embodiment;

FIG. 7 is a schematic diagram of an operating system according to a second embodiment of the present utility model;

FIG. 8 is another schematic diagram of an operating system according to a second embodiment of the present utility model;

FIG. 9 is a schematic cross-sectional view of an operating system according to a second embodiment of the present utility model;

FIG. 10 is an exploded view of the operating system of the second embodiment of the present utility model;

Fig. 11 is a schematic view of the matching relationship between the front link and the second locking member and the state of the first locking member when the circuit breaker of the present utility model is in the closed state;

Fig. 12 is a schematic view showing the mating relationship of the front link and the second locking member and the state of the first locking member when the circuit breaker of the present utility model is in the open state and the operating member is pulled.

Description of the reference numerals

The device comprises a shell 1, an installation guide structure 1-1, a first jack 1-20, a second jack 1-21, a signal jack 1-3, a signal window 1-4, a third jack 1-50, a fourth jack 1-51 and an operating piece installation hole 1-6;

An operating element 2, an operating element main body 2b, an operating element connecting part 2c, a connecting part jack 2-0c, a connecting part cavity 2-1c, an operating element triggering part 2-0c, an operating element matching part 2p, an indicating hole 2-1, an installing cavity 2-2, an operating element shaft groove 2-3 and an operating element shaft hole 2-4;

The electromagnetic mechanism 3, the electromagnetic system 3-0, the magnetism generating component 3-0m, the coil component 3-01, the movable iron core 3-02, the magnetic yoke 3-03, the permanent magnet 3-04, the ejector rod 3-05, the front ejector rod 3-050, the front rod body 3-0500, the front connecting cap 3-0501, the rear ejector rod 3-051, the rear rod body 3-0510, the rear connecting cap 3-0511, the front connecting rod 3-1, the front connecting rod driving part 3-11, the front connecting rod cavity 3-110, the front connecting rod jack 3-111, the front connecting rod connecting part 3-12, the front connecting rod first transition surface 3-121, the front connecting rod limiting surface 3-122, the front connecting rod second transition surface 3-123, the front connecting rod connecting arm 3-120, the front connecting rod connecting hole 3-1200, the rear connecting rod 3-2, the rear connecting rod cavity 3-20, the rear connecting rod jack 3-21, the rear connecting rod connecting hole 3-22, the front connecting shaft 3-31 and the rear connecting shaft 3-32;

The contact system 4, the moving contact mechanism 4-1, the contact support 4-10, the support connecting hole 4-100, the moving contact 4-11, the moving contact shaft 4-12 and the fixed contact 4-2;

A third terminal 5-0, a fourth terminal 5-1;

An arc extinguishing system 6;

A sampling device 7;

A first terminal 8-0, a second terminal 8-1;

A secondary loop structure 9;

A first sampling terminal 10-0, a second sampling terminal 10-1;

a control system 11, a circuit board 11p, a first sampling terminal 11-0, and a second sampling terminal 11-1;

A signal terminal 12;

the indicator comprises an indicator 13, an indicator part 13-0, an indicator connecting part 13-1, an indicator mounting part 13-2, an indicator first driven part 13-30 and an indicator second driven part 13-31;

a first locking piece 14, a first locking projection 14-1, a first locking piece driven portion 14-2;

The second locking piece 15, the second locking protrusion 15-0, the second locking piece rear arm 15-1, the second locking piece mounting part 15-2, the second locking piece front arm 15-3, the second locking piece mating part 15-4, the mating part transition surface 15-41, the mating part limiting surface 15-40;

A first locking member return spring 16;

a trigger mechanism 17;

An operating member return spring 18;

An unlocking mechanism 19;

and a connection conductor 20.

Detailed Description

Embodiments of the circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-2 and 6, the circuit breaker of the present utility model comprises a housing 1 and a main circuit structure including an operating member 2 slidably disposed on the housing 1, and an operating mechanism 3, a contact system 4, an arc extinguishing system 6, and a control system 11, each disposed within the housing 1. The operating element 2 has a switching-off position and a switching-on position, and the operating element 2 is switched between the switching-off position and the switching-on position by sliding reciprocally. The operating mechanism 3 comprises an electromagnetic system 3-0, the electromagnetic system 3-0 comprises a magnetism generating component 3-0m and a push rod 3-05 which is movably inserted in the middle of the magnetism generating component 3-0m, and the push rod 3-05 has a first position and a second position and is switched between the first position and the second position through reciprocating movement. The contact system 4 comprises a moving contact mechanism 4-1 and a fixed contact 4-2 which are matched, the moving contact mechanism 4-1 is provided with a closed position and an open position, the moving contact mechanism 4-1 is closed with the fixed contact 4-2 when in the closed position (namely, the contact system 4 is in the closed state), the moving contact mechanism 4-1 is disconnected with the fixed contact 4-2 when in the open position (namely, the contact system 4 is in the open state), one end of the ejector rod 3-05 is in transmission connection with the moving contact mechanism 4-1, and the ejector rod 3-05 is switched between a first position and a second position to drive the moving contact mechanism 4-1 to be switched between the closed position and the open position. The arc extinguishing system 6 is used in cooperation with the contact system 4 for extinguishing an arc generated when the contact system 4 is closed and opened. The operating member 2 is switched between a closing position and a breaking position, and the moving contact mechanism 4-1 is driven by the electromagnetic system 3-0 to be switched between a closing position and an opening position, so that the contact system 4 is switched between a closing state and an opening state, namely, the circuit breaker of the utility model is switched between a closing state and a breaking state. The electromagnetic system 3-0 works under the control of the control system 11 to drive the ejector rod 3-05 to switch between the first position and the second position, so that the ejector rod 3-05 drives the movable contact mechanism 4-1 to switch between the closed position and the open position. Obviously, in the circuit breaker of the utility model, the closing position of the operating member 2, the first position of the ejector rod 3-05, the closing position of the moving contact mechanism 4-1, the closing state of the contact system 4 and the closing state of the circuit breaker correspond to each other, and the opening position of the operating member 2, the second position of the ejector rod 3-05, the opening position of the moving contact mechanism 4-1, the opening state of the contact system and the opening state of the circuit breaker correspond to each other. Furthermore, two ends of the ejector rod 3-05 are respectively in transmission fit with the operating piece 2 and the moving contact mechanism 4-1.

Specifically, as shown in fig. 1-2, 6 and 11-12, two ends of the ejector rod 3-05 are respectively connected with the operating member 2 and the moving contact mechanism 4-1 in a transmission manner, one end of the operating member 2 is inserted into the housing 1, and the other end of the operating member protrudes outside the housing 1 to be operated by external force, so that the external force can drive the contact system 4 to be closed and opened (namely, drive the circuit breaker to be closed and opened) through the operating mechanism 3 by pressing and pulling the operating member 2.

Specifically, as shown in fig. 2-8 and 10, the moving contact mechanism 4-1 includes a contact support 4-10 and a moving contact 4-11 carried on the contact support 4-10. Further, the movable contact mechanism 4-1 is rotatably arranged through a contact support 4-10. Further, the moving contact mechanism 4-1 further comprises a contact spring (not shown in the drawing of the specification), the contact support 4-1 is rotatably arranged on the shell 1 through a moving contact shaft 4-12, and the moving contact 4-11 and the contact support 4-10 are rotatably arranged relatively, so that after the moving contact 4-11 and the fixed contact 4-2 are allowed to be closed, the contact support 4-10 can continuously rotate for a certain angle relative to the moving contact 4-11, and the contact spring applies acting force to the moving contact 4-11 to enable the acting force to press the fixed contact 4-2 to ensure reliable contact of the moving contact 4-11 and the fixed contact.

As other embodiments, the movable contact mechanism 4-1 is provided integrally movable, and the movable contact mechanism 4-1 is switched between a closed position and an open position by reciprocating movement to be closed and opened with the stationary contact 4-2.

Further, the moving contact mechanism 4-1 is provided with two groups of moving contacts 4-11 which are arranged in parallel, so that the electric repulsive force between the moving contact and the static contact can be effectively reduced, and the current capacity can be improved.

Further, the operating mechanism 3 further comprises a rear connecting rod 3-2, the rear connecting rod 3-2 is connected with one end of a push rod 3-05 of the electromagnetic system 3-0 and hinged with the contact support 4-11, and the axis of the hinged shaft of the rear connecting rod 3-2 and the contact support 4-11 is arranged at intervals in parallel with the rotation axis of the moving contact mechanism 4-1.

Specifically, the rear connecting rod 3-2 is provided with a rear connecting rod cavity 3-20 and a rear connecting rod jack 3-21, the rear connecting rod jack 3-21 is arranged on the side wall (the side wall is close to the magnetism generating component 3-0m of the magnetic holding system 3-0) of the rear connecting rod cavity 3-20, the rear rod body 3-0510 of the ejector rod 3-05 is inserted into the rear connecting rod jack 3-21, the outer diameter of the rear rod body 3-0510 is matched with the inner diameter of the rear connecting rod jack 3-21, the rear connecting cap 3-0511 of the ejector rod 3-05 is arranged in the rear connecting rod cavity 3-20, the outer diameter of the rear connecting cap 3-0511 is larger than the inner diameter of the rear connecting rod jack 3-21 and the outer diameter of the rear rod body 3-0510, the rear connecting rod 3-2 comprises a first rear connecting rod opening and a second rear connecting rod opening, the first rear connecting rod opening is communicated with the rear connecting rod cavity 3-20, the second rear connecting rod opening is communicated with the rear connecting rod body 3-21, the rear connecting rod body 3-0510 enters the rear connecting rod jack 3-21 through the second rear connecting rod opening, and the rear connecting rod cap 3-21, the outer diameter of the rear connecting cap 3-0511 is larger than the inner diameter of the rear connecting rod cavity 3-21, and the rear connecting rod 3-1 enters the rear connecting rod cavity 3-20 through the first rear connecting rod opening.

Specifically, the rear connecting rod 3-2 is hinged with the contact support 4-11 through a rear connecting shaft 3-32. Further, in the rear link 3-2 and the contact support 4-10, the connecting shaft 3-32 is provided on one side to move synchronously therewith, and the other side is provided with a kidney-shaped hole which is engaged with the rear connecting shaft 3-32. Further, the rear connecting rod 3-2 is provided with a rear connecting rod connecting hole 3-22 for inserting and adapting the rear connecting shaft 3-32, the rear connecting shaft 3-32 is inserted in the rear connecting rod connecting hole 3-22 and moves synchronously with the rear connecting rod 3-2, and the contact support 4-11 is provided with a waist-shaped hole which is a support connecting hole 4-100 for inserting the rear connecting shaft 3-32.

As other embodiments, the ejector rod 3-05 may also be directly hinged to the contact support 4-11, and the detailed connection between the two may be implemented by the prior art, which will not be described herein.

Further, the main circuit structure further comprises a sampling device 7 coupled with the contact system 4 (i.e. coupled with the moving contact mechanism 4-1), the sampling device 7 is used for collecting current signals flowing in the contact system 4 and is connected with the control system 11, and when overload and/or short-circuit current flows in the contact system 4 (i.e. the control system 11 detects the overload and/or short-circuit current through the sampling device 7), the control system 11 controls the electromagnetic system 3-0 to work so as to drive the ejector rod 3-05 to move from the first position to the second position, thereby driving the moving contact mechanism 4-1 to move from the closed position to the open position. In the circuit breaker, the electromagnetic system 3-0 is used as a power mechanism for driving the contact system 4 to be closed and opened and is also used as a mechanism for realizing overload and/or short-circuit protection, compared with the existing circuit breaker, a bimetal element for realizing overload protection and/or an electromagnetic tripping mechanism for realizing short-circuit protection can be omitted, the number of components of the circuit breaker is reduced, the structure of the circuit breaker is simplified, a larger space is provided for the layout of the components of the circuit breaker, and the overall size and specification of the circuit breaker are reduced. In the circuit breaker of the utility model, when overload and short-circuit current flow in the contact system 4, the control system 11 controls the electromagnetic system 3-0 to work to drive the ejector rod 3-05 to move from the first position to the second position, namely, the electromagnetic system 3-0 is used as a mechanism for overload protection and short-circuit protection at the same time.

Specifically, the sampling device 7 is a manganese-copper shunt connected in series with the contact system 4 (i.e. connected in series with the moving contact mechanism 4-1), or the sampling device 7 is a transformer coupled with the contact system 4 (i.e. coupled with the moving contact mechanism 4-1), for example, the transformer can be sleeved on a conductor connected in series with the contact system 4 to realize the coupling with the contact system 4. In the circuit breaker of the present utility model, the sampling device 7 is preferably a manganese-copper shunt.

Further, the main circuit structure further comprises a first terminal 8-0 and a third terminal 5-0, and the first terminal 8-0, the contact system 4 and the third terminal 5-0 are sequentially connected in series. Further, the third terminal 5-0, the fixed contact 4-2, the moving contact mechanism 4-1 and the first terminal 8-0 are sequentially connected in series.

Specifically, the first terminal 8-0 is an incoming line terminal of the main loop structure, the third terminal 5-0 is an outgoing line terminal of the main loop structure, the sampling device 7 is a manganese copper shunt, the third terminal 5-0, the fixed contact 4-2, the moving contact mechanism 4-1, the sampling device 7 and the first terminal 8-0 are sequentially connected in series, or the third terminal 5-0, the sampling device 7, the fixed contact 4-2, the moving contact mechanism 4-1 and the first terminal 8-0 are sequentially connected in series.

Further, the main circuit structure further comprises a connecting conductor 20, and the fixed contact 4-2 is electrically connected with the third terminal 5-0 through the connecting conductor 20.

Further, the main circuit structure further includes a signal terminal 12 connected to the control system 11, and the control system 11 communicates with an external device through the signal terminal 12, for example, the control system 11 transmits data through the signal terminal 12 and receives external control signals (a remote switch-on signal and a remote switch-off signal) through the signal terminal 12.

Further, the circuit breaker of the utility model further comprises a secondary loop structure 9 arranged in the shell 1, wherein the secondary loop structure 9 is a through circuit. By "pass-through circuit" is meant a circuit structure in which there is no operable break point in the circuit (e.g., there is no break point realized by a moving contact and a fixed contact, the break point is closed when the moving contact is closed with the fixed contact, and the break point is opened when the moving contact is opened with the fixed contact) and which is connected to an external circuit, i.e., which can be directly turned on. Further, the secondary loop structure 9 includes a second terminal 8-1, a through conductor and a fourth terminal 5-1 connected in series. Further, the through conductor is a conductive plate or a flexible conductor. It should be noted that the circuit breaker of the present utility model may be configured with only a main circuit structure, and the circuit breaker is a single-phase circuit breaker (i.e., a 1P-type circuit breaker), and the circuit breaker of the present utility model may be configured with both a main circuit structure and a sub-circuit structure, and the circuit breaker is a two-phase circuit breaker (i.e., a 1p+1n-type circuit breaker). In addition, a plurality of circuit breakers of the embodiment can be arranged side by side, and an operating piece of the circuit breaker is in linkage fit with an operating system to realize a two-phase (2P type circuit breaker) or a multi-phase (3P or 4P) circuit breaker.

Specifically, the second terminal 8-1 is an incoming terminal of the secondary loop structure 9, and the fourth terminal 5-1 is an outgoing terminal of the secondary loop structure 9.

As shown in fig. 2 and 6, the control system 11 includes a wiring board 11p.

Further, the control system 11 further includes a first sampling terminal 11-0 connected to the circuit board 11p, where the first sampling terminal 11-0 is electrically connected to the connection conductor 20 to detect a voltage signal, a current signal and an on-off state of the main circuit structure, so as to determine the current state of the circuit breaker according to the present utility model. Further, the connection conductor 20 is a conductive plate, the first sampling terminal 11-0 is disposed on the circuit board 11p, and the conductive plate is in plug-in fit with the first sampling terminal 11-0.

Further, the control system 11 further includes a second sampling terminal 11-1 electrically connected to the circuit board 11p and the through conductor, respectively, for detecting a voltage signal and a current signal of the secondary loop structure. Further, the through conductor is a conductive plate, the second sampling terminal 11-1 is arranged on the circuit board 11p, and the conductive plate is in plug-in fit with the second sampling terminal 11-1.

As shown in fig. 2-10, the electromagnetic system 3-0 is a magnetic latching system.

Further, the magnetic generating assembly 3-0m comprises a coil assembly 3-01, a magnetic yoke 3-03 and a permanent magnet 3-04, wherein the magnetic yoke 3-03 and the permanent magnet 3-04 are arranged around the coil assembly 3-01, the permanent magnet 3-04 is sleeved outside the middle of the coil assembly 3-01 and is positioned between two electromagnetic coils of the coil assembly 3-01, the electromagnetic system 3-0 further comprises a movable iron core 3-02 which is arranged in the middle of the coil assembly 3-01 in a sliding mode, the movable iron core 3-02 is connected with a push rod 3-05 and moves synchronously, two ends of the push rod 3-05 protrude out of two axial sides of the coil assembly 3-01 respectively, the electromagnetic system 3-0 further comprises a first static iron core and a second static iron core which are arranged oppositely along the axial direction of the coil assembly 3-01, when one end of the movable iron core 3-02 is attracted with the first static iron core, the push rod 3-05 is positioned at a first position, when the movable iron core 3-02 is attracted with the second static iron core, the push rod 3-05 is positioned at a second position, and the push rod 3-05 moves reciprocally along the axial direction of the coil assembly 3-01 and is switched between the first position and the second position. Further, the yoke 3-03 has a square frame structure, and the first and second stationary cores are served by a pair of sidewalls of the yoke 3-03. Further, the magnetic yoke 3-03 comprises a magnetic yoke base and a magnetic yoke end plate, wherein the magnetic yoke base is of a U-shaped structure, the opening end of the U-shaped structure of the magnetic yoke base is connected with the magnetic yoke end plate, and the magnetic yoke end plate and the bottom plate of the U-shaped structure of the magnetic yoke base are used as the first static iron core and the second static iron core.

It should be noted that the electromagnetic system 3-0 may also be a prior art magnetic latching system of other types of structures, for example, a prior art magnetic latching system differs from the present embodiment in that it includes two sets of permanent magnets, which are respectively sleeved outside the two axial ends of the coil assembly 3-01, and the electromagnetic coil of the coil assembly 3-01 is located between the two sets of permanent magnets.

Further, the ejector rod 3-05 comprises a front ejector rod 3-050 and a rear ejector rod 3-051, one end of the front ejector rod 3-050 is inserted into the movable iron core 3-02, the other end of the front ejector rod protrudes out of one axial end of the electromagnetic coil and is in transmission connection with the operating piece 2, one end of the rear ejector rod 3-051 is inserted into the movable iron core 3-02, and the other end of the rear ejector rod protrudes out of the other axial end of the electromagnetic coil and is in transmission connection with the movable contact mechanism 4-1.

Specifically, the front ejector rod 3-05 comprises a front rod body 3-0500 and a front connecting cap 3-0501, one end of the front rod body 3-0500 is connected with the front connecting cap 3-0501, the other end of the front rod body is connected with the movable iron core 3-02 (for example, one axial end of the driven iron core 3-02 is inserted into the movable iron core 3-02), the rear ejector rod 3-051 comprises a rear rod body 3-0510 and a rear connecting cap 3-0511, one end of the rear rod body 3-0510 is connected with the rear connecting cap 3-0511, and the other end of the rear rod body is connected with the movable iron core 3-02 (for example, the other axial end of the driven iron core 3-02 is inserted into the movable iron core 3-02). Further, the front rod body 3-0500 and the front connecting cap 3-0501 are of an integral structure or a detachable split structure, and the rear rod body 3-0510 and the rear connecting cap 3-0511 are of an integral structure or a detachable split structure.

As shown in fig. 2, 6 and 11-12, the circuit breaker of the utility model further comprises a first locking piece 14 and a first locking piece return spring 16, wherein the first locking piece 14 is slidably arranged in the shell 1, the sliding direction of the first locking piece 14 is perpendicular to the moving direction of the operating piece 2, the first locking piece return spring 16 acts on the first locking piece 14 to enable the first locking piece 14 to have a trend of moving towards the outside of the shell 1, the first locking piece 14-1 of the first locking piece 14 protrudes out of the shell 1, the first locking piece 14 moves towards the inside of the shell 1 when the first locking piece 14-1 is extruded by an external force (namely, the first locking piece 14-1 is driven to move towards the inside of the shell 1 as a whole when the first locking piece 14-1 is extruded by the external force), and the circuit breaker moves towards the inside of the shell 1 when the first locking piece 14 is driven by the drawn operating piece 2 in a breaking state, namely, the operating piece 2 is pulled in a breaking position to drive the first locking piece 14 to move towards the inside of the shell 1.

When the circuit breaker is installed in a circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electric cabinets) in actual use, the first locking protrusion 14-1 is extruded by the structure of the circuit breaker installation cabinet and moves towards the inside of the shell 1, the appointed position of the circuit breaker installation cabinet is not affected, after the circuit breaker is installed in place in the appointed position, the first locking protrusion 14-1 can be opposite to a first locking hole arranged at the appointed position of the circuit breaker installation cabinet and moves towards the outside of the shell 1 to be inserted into the first locking hole, and therefore the circuit breaker is in limit fit with the circuit breaker installation cabinet, so that the circuit breaker cannot be pulled out of the appointed position of the circuit breaker installation cabinet in a closing state, the personal safety of operators is guaranteed, and the reliability and stability of electricity consumption are guaranteed.

As shown in fig. 5 and 11-12, the circuit breaker of the utility model further comprises a second locking piece 15 rotatably arranged in the shell 1, wherein the second locking piece 15 comprises a second locking protrusion 15-0, when the operating piece 2 moves from the opening position to the closing position, the second locking piece 15 is directly or indirectly driven by the operating piece 2 to rotate forward so as to enable the second locking protrusion 15-0 to move outside the shell 1, when the operating piece 2 moves from the closing position to the opening position, the second locking piece 15 reversely rotates so as to enable the second locking protrusion 15-0 to move inside the shell 1, and when the operating piece 2 moves from the closing position, the operating piece 2 directly or indirectly limits the reverse rotation of the second locking piece 15.

The second locking piece 15 is driven by the operating piece 2 to rotate forward when the operating piece 2 moves from the opening position to the closing position, so that the second locking protrusion 15-0 moves towards the outside of the shell 1, the second locking protrusion 15-0 is used for limiting and matching with the structure of a breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electric cabinets), and therefore the breaker is prevented from being installed in the breaker installation cabinet in the closing state, the personal safety of an operator is guaranteed, the breaker is installed in the breaker installation cabinet in the opening state and is installed in place, the second locking protrusion 15-0 protruding out of the shell 1 is also used for being opposite to and extending into a second locking hole of the breaker installation cabinet, the second locking protrusion 15-0 is in limiting and matching with the structure of the breaker installation cabinet, and when the operating piece 2 is in the closing position, the front connecting rod 3-1 is prevented from reversely rotating with the second locking piece 15 in a limiting and matching mode, the breaker installation cabinet is prevented from being pulled out in the closing state, the personal safety of the breaker installation cabinet is guaranteed, the person is guaranteed to be guaranteed, and the second locking protrusion 15-0 is prevented from moving from the inside of the shell 1 when the second locking protrusion 15-0 is not matched with the second locking protrusion 15 is moved towards the inside of the breaker installation cabinet, and the second locking protrusion 15 is prevented from moving from the opening position.

Further, the second locking protrusion 15-0 is a square protrusion, so that the condition that the second locking protrusion 15-0 is extruded to damage or deform the second locking member 15 when the operating member 2 is in the closing position and the circuit breaker is directly installed in the circuit breaker installation cabinet is avoided.

Further, when the operating member 2 is moved from the closing position to the opening position, the second locking member 15 is directly or indirectly driven by the operating member 2 to rotate reversely, so that the second locking protrusion 15-0 moves into the housing 1. Further, the second locking member 15 is driven to reversely rotate by the operating member 2 pulled at the opening position, and the first locking member 14 is driven to reversely rotate by the second locking member 15 when the operating member 2 at the opening position is pulled, that is, the operating member 2 simultaneously drives the second locking member 15 to reversely rotate when the operating member 2 is pulled at the opening position, and the second locking member 15 simultaneously drives the first locking member 14 to move inside the housing 1.

As another embodiment, the circuit breaker of the present utility model includes a second locking member return spring acting on the second locking member 15 to cause the second locking member 15 to have a tendency to rotate reversely, and when the operating member 2 moves from the closing position to the opening position, the operating member 2 no longer restricts the second locking member 15 from rotating reversely, and the second locking member return spring drives the second locking member 15 to rotate reversely.

The circuit breaker of the present utility model may be provided with the first locking member 14 and the second locking member 15 at the same time, or may be provided with only the first locking member 14 or the first locking member 15.

As shown in fig. 3-4 and 7-12, the circuit breaker of the utility model further comprises an indicator 13 which is arranged in the middle of the operating member 2 and has a first indication position and a second indication position, the operating member 2 comprises an indication hole 2-1 which is matched with the indicator 13, when the operating member 2 moves to a closing position, the indicator 13 is driven by an indicator driving structure to rotate to the first indication position, and when the operating member 2 moves to a separating position, the indicator 13 is driven by the indicator driving structure to rotate to the second indication position, namely, the first indication position and the second indication position of the indicator 13 respectively correspond to the closing position and the separating position of the operating member 2 and respectively correspond to the closing state and the separating state of the circuit breaker of the utility model. The indicator 13 is arranged in the middle of the operating part 2, which is beneficial to improving the structural compactness of the circuit breaker and reducing the overall required installation space of the circuit breaker.

Further, the indicator 13 comprises an indicator part 13-0, an indicator connecting part 13-1, an indicator mounting part 13-2, a closing driven part 13-30 and a separating brake driven part 13-31 which are sequentially connected, wherein the indicator 13-0 is matched with an indicator hole 2-1 of the operator 2, the indicator 13 is rotatably mounted on the operator 2 through the indicator mounting part 13-2, the closing driven part 13-30 and the separating brake driven part 13-31 are sequentially arranged along the rotation direction of the indicator mounting part 13-2, the indicator driving structure is realized by the shell 1 (for example, a driving protrusion is arranged on the shell 1, the driving protrusion is inserted between the closing driven part 13-30 and the separating brake driven part 13-31), when the operator 2 moves to a closing position, the abutting pressure of the closing driven part 13-0 of the indicator driving structure enables the indicator 13 to rotate to a first indicating position, and when the operator 2 moves to a separating brake position, the separating brake driven part 13-1 enables the indicator 13 to rotate to a second indicating position.

In other embodiments, the indicator 13 is not provided with a closing driven part 13-30 and a separating brake driven part 13-31, but is provided with one indicator driven part only on the indicator mounting part 13-2, the corresponding indicator driving structure comprises two indicator driving protrusions, one indicator driving protrusion is a closing driving protrusion and the other indicator driving protrusion is a separating brake driving protrusion, the indicator driven part is inserted between the two indicator driving protrusions, when the operating member 2 moves to a closing position, the closing driving protrusion presses the indicator driven part to enable the indicator 13 to rotate to a first indicating position, and when the operating member 2 moves to a separating brake position, the separating brake driving protrusion presses the indicator driven part to enable the indicator 13 to rotate to a second indicating position.

As shown in fig. 1, the housing 1 further includes an operating member mounting hole 1-6 into which the operating member 2 is inserted, a first insertion hole 1-20 mated with the first terminal 8-0, a second insertion hole 1-21 mated with the second terminal 8-1, a signal insertion hole 1-3 mated with the signal terminal 12, a third insertion hole 1-50 mated with the third terminal 5-0, and a fourth insertion hole 1-51 mated with the fourth terminal 5-1.

As shown in fig. 1, the casing 1 further includes a signal window 1-4, the circuit breaker further includes an indicating element connected to the control system 11, the indicating element is matched with the signal window 1-4, and is used for indicating the state of the circuit breaker, such as a switching-on and switching-off state, a fault state, a communication state, etc., of the circuit breaker, and the signal window 1-4 and the operating member mounting hole 1-6 are disposed on the same side wall of the casing 1. Further, the indicating element is an indicating lamp.

As shown in fig. 2, 6, 11-12, the housing 1 is further provided with a first opening through which the first locking protrusion 14-1 of the first locking member 14 passes and a second opening through which the second locking protrusion 15-0 of the second locking member 15 passes. Further, the first opening and the second opening are the same opening.

As shown in fig. 1, the housing 1 further includes a mounting guide structure 1-1 for cooperating with a guide structure on a circuit breaker mounting cabinet (e.g., a power distribution cabinet, a control cabinet or other electrical cabinet) when the circuit breaker of the present utility model is installed in the circuit breaker mounting cabinet, so that the circuit breaker of the present utility model is mounted in place in a correct posture. Further, the installation guide structure 1-1 is a guide rib structure.

As shown in fig. 2-5, is a first embodiment of the operating system.

The operating system of this embodiment further includes a trigger mechanism 17 connected to the control system 11, where the trigger mechanism 17 is triggered by the operating member 2 moving to the closing position to output a first closing signal to the control system 11, after receiving the first closing signal, the control system 11 controls the electromagnetic system 3-0 to operate so that the ejector rod 3-05 drives the moving contact mechanism 4-1 to move to the closing position, that is, when the operating member 2 is operated by an external force to perform closing operation (that is, when the circuit breaker of the present utility model is closed), the operating member 2 moves from the opening position to the closing position to trigger the trigger mechanism 17, and the trigger mechanism 17 outputs the first closing signal to the control system 11, so that the control system 11 controls the electromagnetic system 3-0 to operate so that the ejector rod 3-05 moves from the second position to the first position, and the ejector rod 3-05 drives the moving contact mechanism 4-1 to move from the opening position to the closing position. Further, the ejector rod 3-05 remains stationary during the movement of the operating member 2 to the closing position, that is, during the movement of the operating member 2 from the opening position to the closing position, the ejector rod 3-05 does not move with the operating member 2, but remains in the second position, and the moving contact mechanism 4-1 remains in the opening position. Further, the triggering mechanism 17 is a micro switch.

Further, two ends of the ejector rod 3-05 are respectively connected with the operating piece 2 and the moving contact mechanism 4-1 in a transmission way, the ejector rod 3-05 is driven by the operating piece 2 moving towards the opening position to move, so that the moving contact mechanism 4-1 is driven to move towards the opening position, namely, the operating piece 2 is driven to move towards the opening position from the closing position, the ejector rod 3-05 is driven to move towards the second position from the first position, the ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move towards the opening position from the closing position, and therefore the breaker of the utility model is opened, in other words, when the breaker of the utility model is opened, the operating piece 2 directly drives the ejector rod 3-05 to move, and the moving contact mechanism 4-1 is driven to move towards the opening position by the ejector rod 3-05.

In the operating system of this embodiment, when the operating element 2 moves from the opening position to the closing position to perform the closing operation, the electromagnetic coil of the electromagnetic system 3-0 participates therein, and when the operating element 2 moves from the closing position to perform the opening operation, the electromagnetic coil of the electromagnetic system 3-0 does not participate therein.

Specifically, as shown in fig. 3-5, the operating member 2 includes an operating member main body 2b and an operating member connecting portion 2c for external force operation, one end of the ejector rod 3-05 is matched with the operating member connecting portion 2c and is disposed in a manner of moving relative to the operating member connecting portion 2c along the moving direction of the operating member 2, the operating member main body 2b is slidably disposed on the housing 1, and one end of the operating member main body protrudes outside the housing 1 for external force operation (i.e., one end of the operating member 2 protrudes outside the housing 1 for external force operation). Further, the operating part connecting part 2c comprises a connecting part cavity 2-1c, the ejector rod 3-05 comprises a front rod body 3-0500 and a front connecting cap 3-0501, the front connecting cap 3-0501 comprises a front cap peak, the front cap peak protrudes out of one side of the front rod body 3-0500 along the radial direction of the front rod body 3-0500, the front connecting cap 3-0501 is movably arranged in the connecting part cavity 2-1c, the side wall (an operating part separating wall) of the connecting part cavity 2-1c is in transmission fit with the front cap peak, and when the operating part 2 moves from a closing position to a separating position, the ejector rod 3-05 is driven to move so as to drive the moving contact mechanism 4-1 to move through the ejector rod 3-05, so that the contact system 4 is disconnected. Further, the operation piece connecting part 2c further comprises a connecting part jack 2-0c arranged on the connecting part cavity 2-1c, the outer diameter of the front connecting cap 3-0501 is larger than that of the front rod body 3-0500, the front rod body 3-0500 is inserted into the connecting part jack 2-0c in a sliding mode, the outer diameter of the front rod body 3-0500 is matched with the inner diameter of the connecting part jack 2-0c, and the outer diameter of the front connecting cap 3-0501 is larger than the inner diameter of the connecting part jack 2-0c and is movably arranged in the connecting part cavity 2-1 c. Further, the operation piece connecting portion 2c includes a first connecting portion opening and a second connecting portion opening provided on one side thereof, respectively, the first connecting portion opening being provided on one radial side of the connecting portion insertion hole 2-0c and communicating therewith, the second connecting portion opening communicating with the connecting portion cavity 2-1c, the front connecting cap 3-0501 being introduced into the connecting portion cavity 2-1c from the second connecting portion opening and the front rod body 3-0500 being introduced into the connecting portion insertion hole 2-0c from the first connecting portion opening. Further, the operation member connection portion 2c is a frame structure, and includes a connection portion first edge and a connection portion second edge, the connection portion first edge is connected with the operation member main body 2b, the connection portion jack 2-0c is disposed on the connection portion second edge, and the connection portion cavity 2-1c is located in the middle of the frame structure of the operation member connection portion 2 c. Further, the operating element 2 further includes an operating element engaging portion 2p connected to the operating element main body 2b and disposed parallel to the operating element connecting portion 2c, and the operating element return spring 18 is a compression spring and disposed parallel to the operating element connecting portion 2c, and has one end engaged with the operating element engaging portion 2p and the other end fixed (e.g., fixed to the housing 1).

As other embodiments, the operation member connecting portion 2c is an L-shaped structure, and includes a connecting portion vertical arm and a connecting portion cross arm, one end of the connecting portion vertical arm is connected with the operation member main body 2b, and the other end of the connecting portion vertical arm is connected with the connecting portion cross arm in a bending manner, the connecting portion vertical arm, the connecting portion cross arm and the operation member main body 2b enclose a connecting portion cavity 2c, and the connecting portion cross arm is in transmission fit with a front cap peak of the front connecting cap 3-0501. Further, the connecting part cross arm is provided with connecting part jacks 2-0c. Further, the connecting portion jack 2-0c is arranged at the free end of the connecting portion cross arm, and the front connecting cap 3-0501 and the front rod body 3-0500 respectively enter the connecting portion cavity 2-1c and the connecting portion jack 2-0c from the direction opposite to the vertical arm of the connecting portion.

As other embodiments, the operating member connecting part 2c is of an L-shaped structure and comprises a connecting part vertical arm and a connecting part cross arm, one end of the connecting part vertical arm is connected with the operating member 2b, the other end of the connecting part vertical arm is connected with the connecting part cross arm in a bending way, the connecting rod 3-05 is provided with a connecting rod kidney-shaped hole, the connecting part cross arm is movably inserted into the connecting part kidney-shaped hole, and when the operating member 2 moves from the opening position to the closing position, the connecting part cross arm moves in the connecting rod kidney-shaped hole, and the connecting rod 3-05 keeps stationary.

Further, the operating element connecting portion 2c is also used for triggering the triggering mechanism 17. Further, the trigger mechanism 17 and the operating member return spring 18 are disposed on both sides of the operating member connecting portion 2c, respectively.

As other embodiments, the operating system further comprises another triggering mechanism, namely a brake-separating triggering mechanism, wherein the brake-separating triggering mechanism is also connected with the control system 11, the ejector rod 3-05 is kept static in the process of moving from the closing position to the brake-separating position of the operating piece 2, the brake-separating triggering mechanism is triggered when the operating piece 2 moves to the brake-separating position, the brake-separating triggering mechanism sends a first brake-separating signal to the control system 11, the control system 11 receives the first brake-separating signal and then controls the electromagnetic system 3-0 to work, the electromagnetic system 3-0 drives the ejector rod 3-05 to move from the first position to the second position, and the ejector rod 3-05 drives the moving contact mechanism 4-1 to move from the closing position to the opening position so as to be disconnected with the fixed contact 4-2.

Further, the operating mechanism 3 further includes a front link 3-1, the front link 3-1 is connected to the operating member 2 and is disposed to move synchronously, and the front link 3-1 has a structure similar to the operating member connecting portion 2c of the operating member 2 and is connected to the front connecting cap 3-0501 and the front rod body 3-0500 of the jack 3-0. Further, the front connecting rod 3-1 and the operating member 2 are of a detachable split type structure or an integral type structure.

As shown in fig. 1-5, a first embodiment of the circuit breaker of the present utility model includes the operating system of the first embodiment.

As shown in fig. 5, when the circuit breaker of the present embodiment is switched on, the operating element body 2b of the operating element 2 is operated (pressed) by an external force to drive the operating element 2 to move from the switching-off position to the switching-on position, and during the process of moving the operating element 2 from the switching-off position to the switching-on position, the ejector rod 3-05 is kept stationary (as shown in fig. 5 (a) -5 (b)), when the operating element 2 moves to the switching-on position (as shown in fig. 5 (b)), the triggering mechanism 17 is triggered, the triggering mechanism 17 sends a first switching-on signal to the control system 11, after the control system 11 receives the first switching-on signal, the electromagnetic system 3-0 is controlled to operate, and the electromagnetic system 3-0 drives the ejector rod 3-05 to move from the second position to the first position (as shown in fig. 5 (b) -5 (c)), and simultaneously drives the moving contact mechanism 4-1 to move from the switching-off position to the switching-on position to close with the fixed contact 4-2 (as shown in fig. 5 (b) -5 (c).

As shown in fig. 5, fig. 5 (c) to 5 (a) show a breaking process of the circuit breaker of the present embodiment, when the circuit breaker of the present embodiment breaks a break, the operating member main body 2b is operated (pulled) by an external force to drive the operating member 2 to move from a closing position to a breaking position, the operating member 2 simultaneously drives the ejector rod 3-05 to move from a first position to a second position (the ejector rod 3-05 moves from the first position to the second position by the second edge of the connecting portion pressing the front connecting cap 3-0501 of the ejector rod 3-05 by the connecting portion 2 c), and the ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closing position to the opening position to break from the fixed contact 4-2.

The circuit breaker of this embodiment includes a first locking mechanism including a first locking member 14 and a first locking member return spring 16. Further, the circuit breaker of the present embodiment further includes an unlocking mechanism 19, where the unlocking mechanism 19 is an unlocking lever, and one end of the unlocking lever is in transmission fit (direct or indirect transmission fit) with the operating member 2 and the other end of the unlocking lever is in transmission fit with the first locking member 14. In particular. One end of the unlocking rod (front end of the unlocking rod) is abutted against the operating member 2 (namely, the front end of the unlocking rod is in direct transmission fit with the operating member 2), the middle part of the unlocking rod is movably abutted against an abutting protrusion of the shell 1 and is rotationally arranged by taking the abutting protrusion as a pivot, the other end of the unlocking rod (rear end of the unlocking rod) is hinged with the first locking member 14, and when the operating member 2 is pulled at the opening position, the front end of the unlocking rod is abutted and pressed to drive the unlocking rod to rotate by taking the abutting protrusion as the pivot, and the rear end of the unlocking rod drives the first locking member 14 to move towards the inside of the shell 1.

As other embodiments, one end of the unlocking lever (front end of the unlocking lever) abuts against the indicator 13 (that is, the front end of the unlocking lever is in indirect transmission fit with the operating member 2 through the indicator 13), the middle part of the unlocking lever is movably abutted against the abutting protrusion of the housing 1 and is rotatably arranged by taking the abutting protrusion as a pivot, the other end of the unlocking lever (rear end of the unlocking lever) is hinged with the first locking member 14, and when the operating member 2 is pulled at the opening position, the indicator 13 abuts against the front end of the unlocking lever to drive the unlocking lever to rotate by taking the abutting protrusion as the pivot, and the rear end of the unlocking lever drives the first locking member 14 to move towards the interior of the housing 1.

In other embodiments, the front end of the unlocking lever is hinged to the operating member 2, the rear end of the unlocking lever is hinged to the first locking member 14, and the middle of the unlocking lever abuts against the abutting protrusion, when the operating member 2 is pulled at the opening position, the operating member 2 drives the unlocking lever to move through the front end of the unlocking lever, and simultaneously enables the unlocking lever to rotate with the abutting protrusion as a pivot, and the rear end of the unlocking lever drives the first locking member 14 to move towards the inside of the housing 1.

The circuit breaker of the embodiment can further comprise a second locking mechanism, the second locking mechanism comprises a second locking piece 15, when the circuit breaker of the embodiment is closed, the second locking piece 15 is directly driven by the operating piece 2 to rotate forward, so that a second locking protrusion 15-0 of the second locking piece 15 protrudes out of the shell 1, when the circuit breaker of the embodiment is opened, the second locking piece 15 is directly driven by the operating piece 2 to rotate reversely, so that the second locking protrusion 15-0 moves into the shell 1, and when the circuit breaker of the embodiment is closed, the operating piece 2 is directly in limit fit with the second locking piece 15, so that the second locking piece 15 is limited to rotate reversely. Further, when the circuit breaker of the present embodiment is closed, the second locking member front arm 15-3 of the second locking member 15 is directly driven by the operating member 2 to rotate the second locking member 15 in the forward direction. Further, in the circuit breaker of the present embodiment, the second locking member 15 is directly driven by the operating member 2 pulled at the opening position to reversely rotate, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move toward the inside of the housing 1, that is, in the circuit breaker of the present embodiment, when the operating member 2 is pulled at the opening position in the opening state, the operating member 2 simultaneously drives the second locking member 15 to reversely rotate, and the second locking member 15 simultaneously drives the first locking member 14 to move toward the inside of the housing 1.

Further, when the operating member 2 is in the opening position, a free stroke exists between the operating member 2 and the front connecting cap 3-0501 of the ejector rod 3-05, so that the operating member 2 is allowed to move outside the housing 1 relative to the ejector rod 3-05, and the first locking member 14 can be driven to move inside the housing 1 by the unlocking mechanism 9 or the second locking member 15 in the opening position. Specifically, when the operating member 2 is in the opening position, a free stroke exists between the opening wall of the operating member 2 and the front connecting cap 3-0501.

As shown in fig. 6-10, is a second embodiment of the operating system.

In the operating system of the embodiment, two ends of the ejector rod 3-05 of the electromagnetic system 3-0 are respectively connected with the operating piece 2 and the moving contact mechanism 4-1 in a transmission way, the operating piece 2 is switched between a closing position and a separating position, and the moving contact mechanism 4-1 is driven by the ejector rod 3-05 to be switched between a closing position and an opening position. That is, when the operating member 2 moves from the opening position to the closing position, the ejector rod 3-05 is driven by the operating member 2 and simultaneously moves from the second position to the first position, the moving contact mechanism 4-1 is driven by the ejector rod 3-05 and simultaneously moves from the opening position to the closing position and is closed with the fixed contact 4-2, and when the operating member 2 moves from the closing position to the opening position, the ejector rod 3-05 is driven by the operating member 2 and simultaneously moves from the first position to the second position, and the moving contact mechanism 4-1 is driven by the ejector rod 3-05 and simultaneously moves from the closing position to the opening position and is disconnected with the fixed contact 4-2.

Further, the operating mechanism 3 further comprises a front connecting rod 3-1, and the front connecting rod 3-1 is connected with the operating piece 2 and synchronously moves. Further, the front connecting rod 3-1 comprises a front connecting rod driving part 3-11 and a front connecting rod connecting part 3-12, the front connecting rod connecting part 3-12 is used for being connected with the operating piece 2, and the front connecting rod driving part 3-11 is used for being in transmission connection with the ejector rod 3-05. Further, when the operating member 2 is in the opening position, a free stroke is provided between the front connecting rod 3-1 and the ejector rod 3-05, so that the front connecting rod 3-1 is allowed to move towards the outside of the housing 1 relative to the ejector rod 3-05 under the driving of the operating member 2.

The front connecting rod driving part 3-11 comprises a front connecting rod jack 3-111 and a front connecting rod cavity 3-110, the ejector rod 3-05 comprises a front rod body 3-0500 and a front connecting cap 3-0501, the outer diameter of the front connecting cap 3-0501 is larger than that of the front rod body 3-0500, the front rod body 3-0500 is slidably inserted into the front connecting rod jack 3-111, the outer diameter of the front rod body 3-0500 is matched with the inner diameter of the front connecting rod jack 3-111, the front connecting cap 3-0501 is arranged in the front connecting rod cavity 3-110, the outer diameter of the front connecting cap 3-0501 is larger than that of the front connecting rod jack 3-111, the front connecting rod driving part 3-11 comprises front connecting rod closing walls and front connecting rod opening walls which are opposite to each other and are respectively positioned on two sides of the front connecting rod cavity 3-110, when the front connecting rod body 3-0501 is moved from the opening position to the opening position, the front connecting cap 3-0501 is pressed by the front connecting rod closing walls, the front connecting rod 3-05 is driven by the front connecting rod 3-05 to the second connecting rod opening position, when the front connecting rod 2 is pushed by the opening position, the front connecting rod 2 is freely, and the front connecting rod opening position is locked by the front connecting rod opening part 2 is opened by the front connecting rod 1, and the front connecting rod opening part 2 is freely, and the front connecting rod opening part is opened by the front connecting rod 2, and the front connecting rod opening part 2, and the front connecting rod opening part is freely, and the front connecting part is opened by the front connecting rod 2 and the front connecting rod opening part 2 and the front connecting part and the front connecting rod 2. Further, the front connecting rod driving part 3-11 further comprises a first driving part opening and a second driving part opening which are respectively arranged on one side of the front connecting rod driving part, the first driving part opening is communicated with the front connecting rod cavity 3-110, the second driving part opening is communicated with the front connecting rod inserting hole 3-111 and is positioned on one radial side of the front connecting rod inserting hole 3-111, the front connecting rod cap 3-0501 enters the front connecting rod cavity 3-110 through the first driving part opening, and the front rod body 3-0500 enters the front connecting rod inserting hole 3-111 through the second driving part opening.

Specifically, the front link connecting portions 3 to 12 include a pair of front link connecting walls, which are respectively arranged on both sides of the operating member 2 and connected thereto. Further, the two front connecting rod connecting walls are connected with the operating piece 2 through a front connecting shaft 3-31 and are respectively positioned at two sides of two side walls of the installation cavity 2-2 of the operating piece 2, the front connecting shaft 3-31 penetrates through the indicator piece installation part 13-2 of the indicator piece 13 to be in rotating fit with the indicator piece, namely, the indicator piece 13 is rotatably arranged on the operating piece 2 through the front connecting shaft 3-31, the two side walls of the installation cavity 2-2 are respectively provided with an operating piece shaft hole 2-4 for inserting the front connecting shaft 3-31, and the front connecting rod connecting walls are provided with front connecting rod connecting holes 3-1200 for inserting the front connecting shaft 3-31.

As shown in fig. 1, 6-12, a second embodiment of the circuit breaker of the present utility model includes the operating system of the second embodiment.

When the circuit breaker of the embodiment is switched on, the operating element main body 2b of the operating element 2 is operated (pressed) by external force to drive the operating element 2 to move from the switching-off position to the switching-on position, the operating element 2 drives the ejector rod 3-05 to move from the second position to the first position through the front connecting rod 3-1, and the ejector rod 3-05 drives the moving contact mechanism 4-1 to move from the switching-off position to the switching-on position to be closed with the fixed contact 4-2.

Further, the operating member 2 and the front connecting rod 3-1 are in a detachable split structure or an integral structure.

When the circuit breaker of the embodiment is opened, the operating member main body 2b is operated (pulled) by external force to drive the operating member 2 to move from the closing position to the opening position, the operating member 2 drives the ejector rod 3-05 to move from the first position to the second position through the front connecting rod 3-1, and the ejector rod 3-05 drives the moving contact mechanism 4-1 to move from the closing position to the opening position to be disconnected with the fixed contact 4-2.

In the circuit breaker of the present embodiment, when the operating member 2 performs the closing operation and the opening operation, the electromagnetic coil of the electromagnetic system 3-0 is not involved therein.

The circuit breaker of the present embodiment includes a first locking mechanism including a first locking member 14 and a first locking member return spring 16, and a second locking mechanism including a second locking member 15. Further, when the circuit breaker of the present embodiment is switched on, the second locking member 15 is driven by the front connecting rod 3-1 (the front connecting rod 3-1 and the operating member 2 are synchronously moved and arranged), the second locking member 15 is driven by the front connecting rod 3-1, that is, indirectly driven by the operating member 2) to rotate forward, so that the second locking protrusion 15-0 of the second locking member 15 protrudes outside the casing 1, when the circuit breaker of the present embodiment is switched off, the second locking member 15 is driven by the front connecting rod 3-1 to rotate reversely, so that the second locking protrusion 15-0 moves inside the casing 1, and when the circuit breaker of the present embodiment is switched on, the front connecting rod 3-1 and the second locking member 15 are in limit fit to limit the second locking member 15 to rotate reversely. Further, when the circuit breaker of the present embodiment is closed, the second locking member front arm 15-3 of the second locking member 15 is driven by the front link 3-1 to rotate the second locking member 15 forward. Further, in the circuit breaker of the embodiment, the second locking member 15 is driven by the operating member 2 pulled at the opening position to reversely rotate, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move towards the inside of the casing 1, that is, in the circuit breaker of the embodiment, when the operating member 2 is pulled at the opening position in the opening state, the operating member 2 simultaneously drives the second locking member 15 to reversely rotate, and the second locking member 15 simultaneously drives the first locking member 14 to move towards the inside of the casing 1, and the operating member 2 can simultaneously unlock the first locking member 14 and the second locking member 15, thereby being beneficial to improving the operating efficiency and simplifying the structure of the circuit breaker.

Specifically, the second locking member 15 further includes a second locking member mounting portion 15-2 and a second locking member front arm 15-3, the second locking member 15 is rotatably disposed on the housing 1 through the second locking member mounting portion 15-2, one end of the second locking member front arm 15-3 is connected to the second locking member mounting portion 15-2, and the other end is provided with a second locking protrusion 15-0, when the circuit breaker of the embodiment is closed, the second locking member front arm 15-3 is driven by the front link 3-1 to make the second locking member 15 rotate forward. Further, the second locking member 15 further includes a second locking member engaging portion 15-4 disposed on the second locking member front arm 15-3, the second locking member engaging portion 15-4 and the second locking protrusion 15-0 are disposed on two sides of the second locking member front arm 15-3, respectively, and when the circuit breaker is closed, the second locking member engaging portion 15-4 is pressed by the front link 3-1 to make the second locking member 15 rotate forward. Further, the second locking piece matching part 15-4 comprises a matching part transition surface 15-41 and a matching part limiting surface 15-40 which are connected in a bending way, and the front connecting rod 3-1 comprises a front connecting rod first transition surface 3-121 which are connected in sequence, The circuit breaker comprises a front connecting rod limiting surface 3-122 and a front connecting rod second transition surface 3-123, wherein the front connecting rod first transition surface 3-121 and the front connecting rod second transition surface 3-123 are respectively connected with the front connecting rod limiting surface 3-122 in a bending way, and are bent towards the same side (the side far away from the second locking piece 15) of the front connecting rod limiting surface 3-122, the matching part limiting surface 15-40 abuts against the front connecting rod limiting surface 3-122 to prevent the second locking piece 15 from rotating reversely, the matching part limiting surface 15-40 and the front connecting rod limiting surface 3-122 are parallel to the moving direction of the front connecting rod 3-1, when the circuit breaker in the embodiment pulls the operating piece 2, the front connecting rod second transition surface 3-123 and the front connecting rod limiting surface 3-122 are sequentially contacted with the free end of the front arm 15-3 of the second locking piece to drive the second locking piece 15-3 to rotate reversely, the front connecting rod limiting surface 3-122 is in limit fit with the free end of the front arm 15-3 of the second locking piece to prevent the second locking piece 15 from rotating reversely, and the first transition surface 15-40 and the front connecting rod limiting surface 3-122 of the embodiment are matched with the front connecting rod limiting surface 3-40 and the front connecting rod limiting surface 15-3-41 in turn when the circuit breaker is pulled in the opening state. Further, the second locking member 15 further includes a second locking member rear arm 15-1, one end of the second locking member rear arm 15-1 is connected to the second locking member mounting portion 15-2 and the other end is in driving engagement with the front link 3-1. Further, the second locking member front arm 15-3 and the second locking member rear arm 15-1 are arranged in a V-shape, and the included angle between them is an obtuse angle, and the opening of the obtuse angle faces the operating member 2. Further, the first locking member 14 includes a first locking member driven portion 14-2, the first locking member driven portion 14-2 is pressed by the second locking member rear arm 15-1 of the second locking member 15 that rotates reversely to drive the first locking member 14 to move toward the inside of the housing 1, that is, in the circuit breaker of the embodiment, when the operating member 2 is in the opening position and in the opening state, the operating member 2 is pulled by an external force to move toward the outside of the housing 1, the operating member 2 simultaneously drives the second locking member 15 to rotate reversely, and the second locking member 15 simultaneously presses the first locking member driven portion 14-2 by the second locking member rear arm 15-1 to drive the first locking member 14 to move toward the inside of the housing 1. Further, one end of the first locking member 14 is a first locking member protrusion 14-1, and a first locking member driven portion 14-2 is disposed at one side of the other end, the first locking member driven portion 14-2 is a protruding rib, and the protruding direction of the protruding rib is perpendicular to the sliding direction of the first locking member 14 and the same as the rotation axis of the second locking member 15.

The following is a third embodiment of the circuit breaker of the present utility model.

The circuit breaker is provided with two trigger mechanisms, one trigger mechanism is a closing trigger mechanism and the other trigger mechanism is a separating brake trigger mechanism, one electromagnetic coil of the electromagnetic system 3-0 is powered on when the operating piece 2 moves to the separating brake position or when the operating piece 2 moves to the separating brake position, the electromagnetic system 3-0 drives the ejector rod 3-05 to move from the first position to the second position, the ejector rod 3-05 simultaneously drives the movable contact mechanism 4-1 to move from the closing position to the opening position, the operating piece 2 is powered on when the operating piece 2 moves to the closing position or is implemented when the operating piece moves to the closing position, the other electromagnetic coil of the electromagnetic system 3-0 is powered on when the operating piece 2 triggers the closing trigger mechanism to enable the other electromagnetic coil of the electromagnetic system 3-0 to move from the second position to the first position, the ejector rod 3-05 simultaneously drives the movable contact mechanism 4-1 to move from the opening position to the closing position, and the circuit breaker is not influenced by the movement of the operating piece 2, and the action of the circuit breaker is only driven by the electromagnetic coil of the electromagnetic system 3-0. Further, the circuit breaker of the embodiment further includes a control system 11 and a sampling device 7, where the control system 11 and the sampling device 7 are only used for controlling the moving contact mechanism 4-1 to move from the closed position to the open position through the electromagnetic system 3-0 when the short circuit and overload faults of the circuit where the circuit breaker is located are detected, and are not used for normal opening and closing control of the circuit breaker.

The following is a fourth embodiment of the circuit breaker of the present utility model.

The circuit breaker comprises at least one group of power supply switch circuits, wherein each power supply switch circuit comprises a trigger mechanism 17 and a normally closed switch which are connected in series in the power supply switch circuit, the power supply switch circuit is connected between a power supply of an electromagnetic system 3-0 and the electromagnetic system 3-0 in series, when the circuit breaker is switched on, when an operating piece 2 moves from a switching-on position to a switching-off position, the trigger mechanism 17 is triggered by the operating piece 2 to be conducted, the electromagnetic system 3-0 is electrified to drive a push rod 3-05 to move from a second position to a first position, so that the circuit breaker is switched on, and meanwhile, the push rod 3-05 directly or indirectly triggers the normally closed switch to be switched off, so that the power supply of the electromagnetic system 3-0 and the electromagnetic system 3-0 are disconnected, and when the circuit breaker is switched off, the operating piece 2 moves from the switching-on position to the switching-off position, and meanwhile, the push rod 3-05 is driven to move from the first position to the second position, so that the circuit breaker is switched off. Further, the electromagnetic system 3-0 is further configured to implement a short circuit and/or overload protection function of the circuit breaker of this embodiment, and then the circuit breaker of this embodiment further includes a control system 11, where the control system 11 is electrically connected to the electromagnetic system 3-0, and a circuit structure implementing the electrical connection between the control system 11 and the electromagnetic system 3-0 is connected in parallel to the power supply switch circuit, so that when the control system 11 detects a short circuit and/or overload current through the sampling device 7, the electromagnetic system 3-0 is driven to move the ejector rod 3-05 from the first position to the second position, and the operating element 2 is simultaneously reset from the closing position to the opening position.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model 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 utility model, and these should be considered to be within the scope of the utility model.

Claims (11)

1. The circuit breaker comprises a shell (1), an operating piece (2) arranged on the shell (1) in a sliding manner, an electromagnetic system (3-0) and a moving contact mechanism (4-1) which are respectively arranged in the shell (1), wherein the electromagnetic system (3-0) comprises a magnetism generating component (3-0 m) and a middle ejector rod (3-05) which is movably inserted in the magnetism generating component (3-0 m), one end of the ejector rod (3-05) is matched with the operating piece (2) and the other end of the ejector rod is in transmission fit with the moving contact mechanism (4-1), the operating piece (2) is switched between a closing position and a separating position, the moving contact mechanism (4-1) is driven to be switched between a closing position and an opening position through an electromagnetic system (3-0), and the electromagnetic system (3-0) is electrically operated, and the moving contact mechanism (4-1) is driven to be switched between the closing position and the opening position through the ejector rod (3-05);

The circuit breaker is characterized by further comprising a second locking piece (15) rotatably arranged in the shell (1), wherein the second locking piece (15) comprises a second locking protrusion (15-0), when the operating piece (2) moves from a switching-off position to a switching-on position, the second locking piece (15) is directly or indirectly driven by the operating piece (2) to rotate positively so as to enable the second locking protrusion (15-0) to move towards the outside of the shell (1), when the operating piece (2) moves from the switching-on position to the switching-off position, the second locking piece (15) reversely rotates so as to enable the second locking protrusion (15-0) to move towards the inside of the shell (1), and when the operating piece (2) moves from the switching-on position, the operating piece (2) is directly or indirectly in limit fit with the second locking piece (15) so as to prevent reverse rotation.

2. The circuit breaker according to claim 1, further comprising a front connecting rod (3-1) connected with the operating member (2) and synchronously moving, wherein two ends of the ejector rod (3-05) are respectively connected with the front connecting rod (3-1) and the moving contact mechanism (4-1) in a transmission mode, when the operating member (2) moves from a switching-off position to a switching-on position, the second locking member (15) is driven by the front connecting rod (3-1) to rotate positively so as to enable the second locking protrusion (15-0) to move outwards of the shell (1), when the operating member (2) moves from the switching-on position to the switching-off position, the second locking protrusion (15-0) is reversely rotated so as to move inwards of the shell (1), and when the operating member (2) moves from the switching-on position, the front connecting rod (3-1) is in limit fit with the second locking member (15) to prevent reverse rotation of the second locking member (15).

3. The circuit breaker according to claim 1, wherein the operating member (2) is switched between a closing position and a breaking position to drive the plunger (3-05) to switch between a first position and a second position, and the plunger (3-05) is switched between the first position and the second position to drive the movable contact mechanism (4-1) to switch between a closing position and an opening position.

4. The circuit breaker according to claim 2, characterized in that the operating member (2) and the front link (3-1) are of integral or split type construction.

5. The circuit breaker according to claim 2, wherein the second locking member (15) further comprises a second locking member mounting portion (15-2) and a second locking member front arm (15-3), the second locking member (15) is rotatably disposed on the housing (1) through the second locking member mounting portion (15-2), one end of the second locking member front arm (15-3) is connected with the second locking member mounting portion (15-2) and the other end is provided with a second locking protrusion (15-0), and when the circuit breaker is closed, the second locking member front arm (15-3) is driven by the front connecting rod (3-1) to enable the second locking member (15) to rotate positively.

6. The circuit breaker according to claim 5, wherein the second locking member (15) further comprises a second locking member engaging portion (15-4) provided on the second locking member front arm (15-3), the second locking member engaging portion (15-4) and the second locking protrusion (15-0) being provided on both sides of the second locking member front arm (15-3), respectively, and the second locking member engaging portion (15-4) being pressed by the front link (3-1) to rotate the second locking member (15) forward when the circuit breaker is closed.

7. The circuit breaker according to claim 5, wherein the second locking member (15) is reversely rotated by the front link (3-1) to move the second locking protrusion (15-0) toward the inside of the case (1) when the operating member (2) is moved from the closing position to the opening position.

8. The circuit breaker according to claim 7, wherein the second locking member (15) further comprises a second locking member rear arm (15-1), one end of the second locking member rear arm (15-1) is connected to the second locking member mounting portion (15-2) and the other end is in driving engagement with the front link (3-1).

9. The circuit breaker according to claim 7, further comprising a first locking member (14) and a first locking member return spring (16) slidably disposed in the case (1), wherein the first locking member return spring (16) acts on the first locking member (14) to cause the first locking member (14) to have a tendency to move toward the outside of the case (1) and to cause a first locking projection (14-1) of the first locking member (14) to project toward the outside of the case (1), the first locking member (14) moves toward the inside of the case (1) when the first locking projection (14-1) is pressed by an external force, the first locking member (14) is driven by an operating member (2) pulled in the opening position to move toward the inside of the case (1), and the second locking member (15) is driven by a second locking member (15) which rotates reversely when the operating member (2) in the opening position is pulled to move toward the inside of the case (1).

10. The circuit breaker according to claim 9, wherein the first locking member (14) comprises a first locking member driven portion (14-2), and the first locking member driven portion (14-2) is pressed by a second locking member (15) counter-rotating against a second locking member rear arm (15-1) to drive the first locking member (14) to move toward the inside of the housing (1).

11. The circuit breaker according to claim 1, wherein the electromagnetic system (3-0) is a magnetic holding system, the magnetic generating assembly (3-0 m) comprises a coil assembly (3-01), a magnetic yoke (3-03) and a permanent magnet (3-04) which are arranged around the coil assembly (3-01), the permanent magnet (3-04) is sleeved outside the middle of the coil assembly (3-01) and is positioned between two electromagnetic coils of the coil assembly (3-01), the electromagnetic system (3-0) further comprises a movable iron core (3-02) which is arranged in the middle of the coil assembly (3-01) in a sliding manner, the movable iron core (3-02) is connected with the ejector rod (3-05) and moves synchronously, two ends of the ejector rod (3-05) are respectively protruded on two axial sides of the coil assembly (3-01), the electromagnetic system (3-0) further comprises a first static iron core and a second static iron core which are arranged oppositely along the axial direction of the coil assembly (3-01), one end of the movable iron core (3-02) is attracted to the first static iron core (3-05), and the movable iron core (3-02) is arranged at the first position and the second position of the movable iron core (3-05) is located at the first position.