Circuit breaker

Abstract

The utility model relates to the field of low-voltage electric appliances, in particular to a circuit breaker, which is characterized in that an operating piece is switched between a closing position and an opening position, and a moving contact mechanism is driven by an electromagnetic system to be switched between the closing position and the opening position; the electromagnetic system is electrified to work and drives the moving contact mechanism to be switched between a closing position and an opening position through the ejector rod; the second locking piece comprises a second locking bulge; when the operating part moves from an opening position to a closing position, the second locking part is directly or indirectly driven by the operating part to rotate in the forward direction, so that the second locking protrusion moves towards the outside of the shell. When the operating part moves from the closing position to the opening position, the second locking part rotates reversely to enable the second locking bulge to move towards the interior of the shell; when the operating piece is at the closing position, the operating piece is directly or indirectly in limiting fit with the second locking piece to prevent the second locking piece from rotating reversely; the circuit breaker is simple in structure, small in occupied space and good in safety.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a circuit breaker. Background Art

[0002] For existing circuit breakers, especially intelligent circuit breakers, their basic structure generally includes a short-circuit protection module, an overload protection module, an operating mechanism, and an electric operating module. The short-circuit protection module and the overload protection module are generally set according to different current specifications of the circuit breaker, and the electric operating module realizes remote operation by means of the cooperation of a motor and a gear. The operating mechanism of the existing circuit breaker has a complex structure and occupies a large space, and moreover, the existing circuit breaker lacks a structure to prevent the circuit breaker from being pulled out of the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet, or other electrical cabinets) in the closed state. In addition, the existing circuit breaker lacks a structure to prevent the circuit breaker from being installed into the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet, or other electrical cabinets) in the closed state. Summary of the Invention

[0003] The purpose of the utility model is to overcome at least one defect of the prior art, and provide a circuit breaker with a simple structure, small occupied space and good safety.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A circuit breaker includes a housing, an operating member slidably arranged on the housing, an electromagnetic system and a moving contact mechanism respectively arranged in the housing. The electromagnetic system includes a magnetic generating assembly and a push rod movably inserted in the middle of the magnetic generating assembly. One end of the push rod is matched with the operating member, and the other end is in transmission cooperation with the moving contact mechanism. The operating member switches between a closing position and a tripping position, and drives the moving contact mechanism to switch between a closed position and an open position through the electromagnetic system. The electromagnetic system is powered on to drive the moving contact mechanism to switch between the closed position and the open position through the push rod.

[0006] The circuit breaker further includes a second locking member rotatably arranged in the housing. The second locking member includes a second locking protrusion. When the operating member moves from the tripping 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 towards the outside of the housing. When the operating member moves from the closing position to the tripping position, the second locking member rotates reversely to make the second locking protrusion move towards the inside of the housing. When the operating member is in the closing position, the operating member is directly or indirectly in limit cooperation with the second locking member to prevent it from rotating reversely.

[0007] Furthermore, the circuit breaker also includes a front connecting rod connected to the operating member and moving synchronously, and the two ends of the top rod are respectively connected to the front connecting rod and the moving contact mechanism for transmission; when the operating member moves from the opening position to the closing position, the second locking member is driven by the front connecting rod to rotate forward so that the second locking protrusion moves toward the outside of the 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 front connecting rod and the second locking member are limited by the cooperation to prevent it from rotating reversely.

[0008] Furthermore, the operating member switches between the closing position and the opening position to drive the push rod to switch between the first position and the second position, and the push rod switches between the first position and the second position to drive the moving contact mechanism to switch between the closing position and the opening position.

[0009] Furthermore, the operating member and the front connecting rod are of an integrated or split structure.

[0010] Furthermore, the second locking member also includes a second locking member mounting portion and a second locking member forearm, the second locking member is rotatably arranged on the shell through the second locking member mounting portion, one end of the second locking member forearm is connected to the second locking member mounting portion and the other end is provided with a second locking protrusion; when the circuit breaker is closed, the second locking member forearm is driven by the front connecting rod to make the second locking member rotate in the forward direction.

[0011] Furthermore, the second locking member also includes a second locking member matching portion arranged on the second locking member forearm, and the second locking member matching portion and the second locking protrusion are respectively arranged on both sides of the second locking member forearm; when the circuit breaker is closed, the second locking member matching portion is pressed by the front connecting rod to cause the second locking member to rotate in the forward direction.

[0012] Furthermore, 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 rotate in the reverse direction so that the second locking protrusion moves toward the inside of the shell.

[0013] Furthermore, the second locking member also includes a second locking member rear arm, one end of which is connected to the second locking member mounting portion and the other end of which is transmission-coordinated with the front connecting rod.

[0014] Further, the circuit breaker further includes a first locking member slidably disposed within the housing and a first locking member return spring. The first locking member return spring acts on the first locking member to give it a tendency to move outward from the housing and causes a first locking protrusion of the first locking member to protrude outside the housing. The first locking member moves inward into the housing when the first locking protrusion is externally pressed; the first locking member is driven by an operating member pulled at the opening position to move inward into the housing; the second locking member is driven by an operating member pulled at the opening position to rotate reversely, and the first locking member is driven by the reversely rotating second locking member to move inward into the housing when the operating member at the opening position is pulled.

[0015] Further, the first locking member includes a first locking member driven portion; the first locking member driven portion is pressed by a second locking member rear arm of the reversely rotating second locking member to drive the first locking member to move inward into the housing.

[0016] Further, the electromagnetic system is a magnetic holding system; the magnetic generating assembly includes a coil assembly, a yoke disposed around the coil assembly, and a permanent magnet. The permanent magnet is sleeved outside the middle of the coil assembly and is located between two electromagnetic coils of the coil assembly; the electromagnetic system further includes a moving iron core slidably disposed in the middle of the coil assembly. The moving iron core is connected to the ejector rod and is arranged to move synchronously. Both ends of the ejector rod protrude from both axial sides of the coil assembly; the electromagnetic system further includes a first static iron core and a second static iron core oppositely arranged along the axial direction of the coil assembly. The ejector rod is in a first position when one end of the moving iron core is attracted to the first static iron core, and the ejector rod is in a second position when the moving iron core is attracted to the second static iron core.

[0017] For the circuit breaker of the present utility model, its operating member drives the moving contact mechanism to move through the ejector rod of the electromagnetic system to achieve manual opening and closing actions. When the electromagnetic system is powered on, it drives the moving contact mechanism to move through the ejector rod to achieve electric operation. The structure is simple, occupies little space, and has a short operation transmission link and good reliability; moreover, the second locking member prevents the circuit breaker from being installed into the circuit breaker installation cabinet in the closed state, ensuring the personal safety of the operator and having good safety.

[0018] In addition, the first locking member prevents the circuit breaker from being pulled out of the circuit breaker installation cabinet in the closed state, ensuring the personal safety of the operator, and ensuring the continuity, stability, and reliability of power consumption.

[0019] In addition, the front connecting rod can directly unlock the second locking member and can also unlock the first locking member through the second locking member, which is beneficial to simplifying the structure of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the circuit breaker of the present utility model, showing at least the structure of the housing;

[0021] Figure 2 is the orthographic view of the circuit breaker of the present utility model, showing the structure of the operating system of the first embodiment;

[0022] Figure 3 is the schematic structural view of the operating system of the first embodiment of the present utility model;

[0023] Figure 4 is the exploded view of the operating system of the first embodiment of the present utility model;

[0024] Figure 5 is the 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 the closing operation;

[0025] Figure 6 is the orthographic view of the circuit breaker of the present utility model, showing the structure of the operating system of the second embodiment;

[0026] Figure 7 is the schematic structural view of the operating system of the second embodiment of the present utility model;

[0027] Figure 8 is another schematic structural view of the operating system of the second embodiment of the present utility model;

[0028] Figure 9 is the schematic sectional view of the operating system of the second embodiment of the present utility model;

[0029] Figure 10 is the exploded view of the operating system of the second embodiment of the present utility model;

[0030] Figure 11 is the schematic view of the cooperation relationship between the front connecting rod 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;

[0031] Figure 12 is the schematic view of the cooperation relationship between the front connecting rod 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 out.

[0032] Description of reference numerals

[0033] Housing 1, mounting guiding structure 1-1, first jack 1-20, second jack 1-21, signal jack 1-3, signal window 1-4, third jack 1-50, fourth jack 1-51, operating member mounting hole 1-6;

[0034] Operating member 2, operating member main body 2b, operating member connecting portion 2c, connecting portion jack 2-0c, connecting portion cavity 2-1c, operating member triggering portion 2-0c, operating member cooperating portion 2p, indicating hole 2-1, mounting cavity 2-2, operating member shaft groove 2-3, operating member shaft hole 2-4;

[0035] Operating mechanism 3, electromagnetic system 3-0, magnetic generating component 3-0m, coil assembly 3-01, moving iron core 3-02, yoke 3-03, permanent magnet 3-04, ejector rod 3-05, front ejector rod 3-050, front rod body 3-0500, front connecting cap 3-0501, rear ejector rod 3-051, rear rod body 3-0510, rear connecting cap 3-0511, front connecting rod 3-1, front connecting rod driving part 3-11, front connecting rod cavity 3-110, front connecting rod jack 3-111, front connecting rod connecting part 3-12, first transition surface 3-121 of front connecting rod, limiting surface 3-122 of front connecting rod, second transition surface 3-123 of front connecting rod, front connecting rod connecting arm 3-120, front connecting rod connecting hole 3-1200, rear connecting rod 3-2, rear connecting rod cavity 3-20, rear connecting rod jack 3-21, rear connecting rod connecting hole 3-22, front connecting shaft 3-31, rear connecting shaft 3-32;

[0036] Contact system 4, moving contact mechanism 4-1, contact support 4-10, support connecting hole 4-100, moving contact 4-11, moving contact shaft 4-12, static contact 4-2;

[0037] Third terminal 5-0, fourth terminal 5-1;

[0038] Arc extinguishing system 6;

[0039] Sampling device 7;

[0040] First terminal 8-0, second terminal 8-1;

[0041] Auxiliary circuit structure 9;

[0042] First sampling terminal 10-0, second sampling terminal 10-1;

[0043] Control system 11, circuit board 11p, first sampling terminal 11-0, second sampling terminal 11-1;

[0044] Signal terminal 12;

[0045] Indicator 13, indicating part 13-0, indicator connecting part 13-1, indicator mounting part 13-2, first actuated part 13-30 of indicator, second actuated part 13-31 of indicator;

[0046] First locking part 14, first locking projection 14-1, actuated part 14-2 of first locking part;

[0047] Second locking part 15, second locking projection 15-0, rear arm 15-1 of second locking part, mounting part 15-2 of second locking part, front arm 15-3 of second locking part, mating part 15-4 of second locking part, transition surface 15-41 of mating part, limiting surface 15-40 of mating part;

[0048] The first locking member return spring 16;

[0049] The trigger mechanism 17;

[0050] The operating member return spring 18;

[0051] The unlocking mechanism 19;

[0052] The connecting conductor 20. Detailed implementation manners

[0053] The following embodiments given in conjunction with the accompanying drawings further illustrate the detailed implementation manners of the circuit breaker of the present utility model. The circuit breaker of the present utility model is not limited to the descriptions of the following embodiments.

[0054] Such as Figure 1-2As shown in Figures 6 and 7, the circuit breaker of the utility model includes a housing 1 and a main circuit structure, and the main circuit structure includes an operating member 2 slidably arranged on the housing 1, and an operating mechanism 3, a contact system 4, an arc extinguishing system 6, and a control system 11, which are respectively arranged in the housing 1. The operating member 2 has an opening position and a closing position, and the operating member 2 switches between the opening position and the closing position by reciprocating sliding. The operating mechanism 3 includes an electromagnetic system 3-0, and the electromagnetic system 3-0 includes a magnetic generating component 3-0m and a top rod 3-05 movably inserted in the middle of the magnetic generating component 3-0m, and the top rod 3-05 has a first position and a second position and switches between the first position and the second position by reciprocating movement. The contact system 4 includes a moving contact mechanism 4-1 and a stationary contact 4-2 used in conjunction with each other. The moving contact mechanism 4-1 has a closed position and an open position. The moving contact mechanism 4-1 is closed with the stationary contact 4-2 when in the closed position (i.e., the contact system 4 is in the closed state), and is disconnected from the stationary contact 4-2 when in the open position (i.e., the contact system 4 is in the open state). One end of the top rod 3-05 is connected to the moving contact mechanism 4-1 by transmission. The top rod 3-05 switches between the first position and the second position to drive the moving contact mechanism 4-1 to switch between the closed position and the open position. The arc extinguishing system 6 is used in conjunction with the contact system 4 to extinguish the arc generated when the contact system 4 is closed and opened. The operating member 2 switches between the closing position and the opening position and drives the moving contact mechanism 4-1 to switch between the closing position and the opening position through the electromagnetic system 3-0, so that the contact system 4 switches between the closing state and the opening state, that is, the circuit breaker of the utility model switches between the closing state and the opening state. The electromagnetic system 3-0 works under the control of the control system 11 and drives the top rod 3-05 to switch between the first position and the second position, so that the top rod 3-05 drives the moving contact mechanism 4-1 to switch between the closing position and the opening position. Obviously, in the circuit breaker of the utility model, the closing position of the operating member 2, the first position of the top 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 top 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, both ends of the push rod 3-05 are respectively in transmission cooperation with the operating member 2 and the moving contact mechanism 4-1.

[0055] Specifically, Figure 1-2 As shown in Figures 6, 11-12, the two ends of the push rod 3-05 are respectively connected to the operating member 2 and the moving contact mechanism 4-1; one end of the operating member 2 is inserted into the shell 1 and the other end protrudes from the outside of the shell 1 for external force operation. The external force can be achieved by pressing and pulling the operating member 2, thereby driving the contact system 4 to close and open (that is, driving the circuit breaker to close and open) through the operating mechanism 3.

[0056] Specifically, as shown in Figure 2-8 Figures 9 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 moving contact mechanism 4-1 is rotatably arranged through the contact support 4-10. Further, the moving contact mechanism 4-1 further includes a contact spring (not shown in the attached drawings of the specification); the contact support 4-1 is rotatably arranged on the housing 1 through a moving contact shaft 4-12, and the moving contact 4-11 is rotatably arranged relative to the contact support 4-10. Thus, after the moving contact 4-11 is closed with the static contact 4-2, the contact support 4-10 can continue to rotate a certain angle relative to the moving contact 4-11, so that the contact spring applies a force to the moving contact 4-11 to press it against the static contact 4-2 to ensure reliable contact between the two.

[0057] As another embodiment, the moving contact mechanism 4-1 is integrally movably arranged, and the moving contact mechanism 4-1 switches between a closed position and an open position by reciprocating movement to close and disconnect from the static contact 4-2.

[0058] Further, the moving contact mechanism 4-1 is provided with two sets of moving contacts 4-11 arranged in parallel, which can effectively reduce the electric repulsive force between the moving and static contacts and improve the current-carrying capacity.

[0059] Further, the operating mechanism 3 further includes a rear connecting rod 3-2. The rear connecting rod 3-2 is connected to one end of the ejector rod 3-05 of the electromagnetic system 3-0 and is hinged to the contact support 4-11. The axis of the hinge shaft of the rear connecting rod 3-2 and the contact support 4-11 is arranged in parallel and at an interval from the rotation axis of the moving contact mechanism 4-1.

[0060] 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 of the rear connecting rod cavity 3-20 (this side wall is close to the magnet-producing component 3-0m of the magnetic holding system 3-0). The rear rod body 3-0510 of the ejector rod 3-05 is inserted into the rear connecting rod jack 3-21, and the outer diameter of the rear rod body 3-0510 is adapted to 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, and 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 includes a first rear connecting rod opening and a second rear connecting rod opening arranged on one side thereof. The first rear connecting rod opening communicates with the rear connecting rod cavity 3-20, and the second rear connecting rod opening communicates with the rear connecting rod jack 3-21. The rear rod body 3-0510 enters the rear connecting rod jack 3-21 through the second rear connecting rod opening, and the rear connecting cap 3-0511 enters the rear connecting rod cavity 3-20 through the first rear connecting rod opening.

[0061] Specifically, the rear connecting rod 3-2 is hinged to the contact support 4-11 through a rear connecting shaft 3-32. Further, in the rear connecting rod 3-2 and the contact support 4-10, the connecting shaft 3-32 is arranged on one to move synchronously therewith, and the other is provided with a kidney-shaped hole for mating with the rear connecting shaft 3-32. Further, the rear connecting rod 3-2 is provided with a rear connecting rod connection hole 3-22 for inserting the rear connecting shaft 3-32 and adapted thereto. The rear connecting shaft 3-32 is inserted into the rear connecting rod connection hole 3-22 and moves synchronously with the rear connecting rod 3-2. The contact support 4-11 is provided with a kidney-shaped hole, and this kidney-shaped hole is a support connection hole 4-100 for inserting the rear connecting shaft 3-32.

[0062] As other embodiments, the ejector rod 3-05 can also be directly hinged to the contact support 4-11, and the detailed connection manner therebetween can be realized through the prior art and will not be elaborated herein.

[0063] Further, the main circuit structure further includes a sampling device 7 coupled to the contact system 4 (that is, coupled to the moving contact mechanism 4-1). The sampling device 7 is used to collect the current signal flowing through the contact system 4 and is connected to the control system 11. When an overload and / or short-circuit current flows through the contact system 4 (that is, the control system 11 detects an overload and / or short-circuit current through the sampling device 7), the control system 11 controls the electromagnetic system 3-0 to operate and drives 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 of the present invention, the electromagnetic system 3-0 serves both as a power mechanism for driving the contact system 4 to close and open and as a mechanism for realizing overload and / or short-circuit protection. Compared with the existing circuit breaker, the bimetallic element for realizing overload protection and / or the electromagnetic tripping mechanism for realizing short-circuit protection can be cancelled, which is beneficial to reducing the number of components of the circuit breaker, simplifying the structure of the circuit breaker, providing a larger space for the layout of each component of the circuit breaker, and further being beneficial to reducing the overall size specification of the circuit breaker. In the circuit breaker of the present invention, when an overload and short-circuit current flows through the contact system 4, the control system 11 controls the electromagnetic system 3-0 to operate and drives the ejector rod 3-05 to move from the first position to the second position. That is, the electromagnetic system 3-0 serves as both an overload protection and a short-circuit protection mechanism at the same time.

[0064] Specifically, the sampling device 7 is a manganin shunt connected in series with the contact system 4 (that is, connected in series with the moving contact mechanism 4-1); or the sampling device 7 is a current transformer coupled to the contact system 4 (that is, coupled to the moving contact mechanism 4-1). For example, the current transformer can be coupled to the contact system 4 by sleeving on a conductor connected in series with the contact system 4. In the circuit breaker of the present invention, the sampling device 7 preferably adopts a manganin shunt.

[0065] Furthermore, the main circuit structure further includes 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 connected in series in sequence. Furthermore, the third terminal 5-0, the static contact 4-2, the moving contact mechanism 4-1 and the first terminal 8-0 are connected in series in sequence.

[0066] Specifically, the first terminal 8-0 is the incoming terminal of the main circuit structure, and the third terminal 5-0 is the outgoing terminal of the main circuit structure; the sampling device 7 is a manganese copper shunt; the third terminal 5-0, the static contact 4-2, the moving contact mechanism 4-1, the sampling device 7 and the first terminal 8-0 are connected in series in sequence; or, the third terminal 5-0, the sampling device 7, the static contact 4-2, the moving contact mechanism 4-1 and the first terminal 8-0 are connected in series in sequence.

[0067] Furthermore, the main circuit structure also includes a connecting conductor 20, and the static contact 4-2 is electrically connected to the third terminal 5-0 via the connecting conductor 20.

[0068] Furthermore, the main circuit structure also includes a signal terminal 12 connected to the control system 11, and the control system 11 communicates with external equipment through the signal terminal 12. For example, the control system 11 transmits data through the signal terminal 12 and receives external control signals (remote closing signal and remote opening signal) through the signal terminal 12.

[0069] Furthermore, the circuit breaker of the utility model also includes a secondary circuit structure 9 arranged in the housing 1, and the secondary circuit structure 9 is a straight-through circuit. The so-called "straight-through circuit" refers to a circuit structure in which there is no operable breakpoint in the circuit (for example, there is no breakpoint realized by the moving contact and the static contact, the breakpoint is closed when the moving contact and the static contact are closed, and the breakpoint is disconnected when the moving contact and the static contact are disconnected) and it can be directly connected to the external circuit. Further, the secondary circuit structure 9 includes a second terminal 8-1, a straight-through conductor and a fourth terminal 5-1 connected in series in sequence. Further, the straight-through conductor is a conductive plate or a soft conductor. It should be pointed out that the circuit breaker of the utility model can only be provided with a main circuit structure, and the circuit breaker is a single-phase circuit breaker (that is, a 1P type circuit breaker); the circuit breaker of the utility model can also be provided with a main circuit structure and a secondary circuit structure at the same time, and the circuit breaker is a two-phase circuit breaker (that is, a 1P+1N type circuit breaker). In addition, multiple circuit breakers of this embodiment can be arranged side by side, and the operating parts and operating system of the circuit breaker can cooperate with each other to realize a two-phase (2P type circuit breaker) or multi-phase (3P or 4P) circuit breaker.

[0070] 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 .

[0071] like Figure 2 ,6 As shown, the control system 11 includes a circuit board 11p.

[0072] Furthermore, the control system 11 further includes a first sampling terminal 11-0 connected to the circuit board 11p. The first sampling terminal 11-0 is electrically connected to the connection conductor 20 to detect the voltage signal, current signal, and on / off state of the main circuit structure, thereby determining the current state of the circuit breaker of 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.

[0073] Furthermore, the control system 11 further includes a second sampling terminal 11-1 respectively electrically connected to the circuit board 11p and the through conductor, for detecting the voltage signal and current signal of the secondary circuit structure. Further, the through conductor is a conductive plate. The second sampling terminal 11-1 is disposed on the circuit board 11p, and the conductive plate is in plug-in fit with the second sampling terminal 11-1.

[0074] As Figure 2-10 shown, the electromagnetic system 3-0 is a magnetic latching system.

[0075] Furthermore, the magnetic component 3-0m includes a coil assembly 3-01, a yoke 3-03 disposed around the coil assembly 3-01, and a permanent magnet 3-04. The permanent magnet 3-04 is sleeved outside the middle of the coil assembly 3-01 and is located between two electromagnetic coils of the coil assembly 3-01. The electromagnetic system 3-0 further includes a moving iron core 3-02 slidably disposed in the middle of the coil assembly 3-01. The moving iron core 3-02 is connected to the ejector rod 3-05 and is synchronously moved. Both ends of the ejector rod 3-05 protrude from both axial sides of the coil assembly 3-01. The electromagnetic system 3-0 further includes a first static iron core and a second static iron core oppositely disposed along the axial direction of the coil assembly 3-01. When one end of the moving iron core 3-02 is attracted to the first static iron core, the ejector rod 3-05 is in the first position. When the moving iron core 3-02 is attracted to the second static iron core, the ejector rod 3-05 is in the second position. The ejector rod 3-05 reciprocally moves along the axial direction of the coil assembly 3-01 and switches between the first position and the second position. Further, the yoke 3-03 is of a square frame structure, and the first static iron core and the second static iron core are formed by a pair of side walls of the yoke 3-03. Further, the yoke 3-03 includes a yoke seat of a U-shaped structure and a yoke end plate. The open end of the U-shaped structure of the yoke seat is connected to the yoke end plate. One of the yoke end plate and the bottom plate of the U-shaped structure of the yoke seat serves as the first static iron core and the other serves as the second static iron core.

[0076] It should be pointed out that the electromagnetic system 3-0 can also adopt other structural types of existing magnetic holding systems. For example, the difference between an existing magnetic holding system and this embodiment is that it includes two groups of permanent magnets, and the two groups of permanent magnets are respectively arranged on the outside of the axial ends of the coil assembly 3-01, and the electromagnetic coil of the coil assembly 3-01 is located between the two groups of permanent magnets.

[0077] Furthermore, the push rod 3-05 includes a front push rod 3-050 and a rear push rod 3-051, one end of the front push rod 3-050 is inserted in the moving iron core 3-02 and the other end protrudes outside the axial end of the electromagnetic coil and is connected to the operating member 2, and one end of the rear push rod 3-051 is inserted in the moving iron core 3-02 and the other end protrudes outside the axial end of the electromagnetic coil and is connected to the moving contact mechanism 4-1.

[0078] Specifically, the front push rod 3-05 includes a front rod body 3-0500 and a front connecting cap 3-0501, one end of the front rod body 3-0500 is connected to the front connecting cap 3-0501 and the other end is connected to the moving iron core 3-02 (for example, one axial end of the moving iron core 3-02 is inserted into the moving iron core 3-02); the rear push rod 3-051 includes a rear rod body 3-0510 and a rear connecting cap 3-0511, one end of the rear rod body 3-0510 is connected to the rear connecting cap 3-0511 and the other end is connected to the moving iron core 3-02 (for example, the other axial end of the moving iron core 3-02 is inserted into the moving iron core 3-02). Furthermore, the front rod body 3-0500 and the front connecting cap 3-0501 are an integrated structure or a detachable split structure; the rear rod body 3-0510 and the rear connecting cap 3-0511 are an integrated structure or a detachable split structure.

[0079] like Figure 2 , 6 As shown in , 11-12, the circuit breaker of the utility model also includes a first locking piece 14 and a first locking piece reset spring 16 slidably arranged in the housing 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 reset spring 16 acts on the first locking piece 14 to make it have a tendency to move to the outside of the housing 1 and make the first locking protrusion 14-1 of the first locking piece 14 protrude outside the housing 1, the first locking piece 14 moves toward the inside of the housing 1 when the first locking protrusion 14-1 is squeezed by an external force (that is, when the first locking protrusion 14-1 is squeezed by an external force, the first locking piece 14 is driven to move toward the inside of the housing 1 as a whole); when the circuit breaker is in the open state, the first locking piece 14 is driven by the pulled operating piece 2 to move toward the inside of the housing 1, that is, when the circuit breaker is in the open state, the operating piece 2 is pulled in the open position to drive the first locking piece 14 to move toward the inside of the housing 1.

[0080] When the circuit breaker of the present utility model is installed in a circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electrical cabinets) during actual use, the first locking protrusion 14-1 moves towards the inside of the housing 1 under the extrusion of the structure of the circuit breaker installation cabinet, which will not affect the installation of the circuit breaker into the designated position of the circuit breaker installation cabinet. After the circuit breaker is installed in the designated position and in place, the first locking protrusion 14-1 will be opposite to the first locking hole provided at the designated position of the circuit breaker installation cabinet and move towards the outside of the housing 1 and insert into the first locking hole, so as to be in limit cooperation with the circuit breaker installation cabinet, so that the circuit breaker will not be pulled out of the designated position of the circuit breaker installation cabinet in the closed state, which not only ensures the personal safety of the operator, but also ensures the reliability and stability of power use.

[0081] As Figure 5 , 11 As shown in FIGS. 11-12, the circuit breaker of the present utility model further includes a second locking member 15 rotatably provided in the housing 1. The second locking member 15 includes a second locking protrusion 15-0. When the operating member 2 moves from the opening position to the closing position, the second locking member 15 is directly or indirectly driven by the operating member 2 to rotate forward so that the second locking protrusion 15-0 moves towards the outside of the housing 1. When the operating member 2 moves from the closing position to the opening position, the second locking member 15 rotates reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1. When the operating member 2 is in the closing position, the operating member 2 directly or indirectly restricts the second locking member 15 from rotating reversely.

[0082] The second locking member 15, when the operating member 2 moves from the opening position to the closing position, is driven by the operating member 2 to rotate forward so that the second locking protrusion 15-0 moves towards the outside of the housing 1. The second locking protrusion 15-0 is used for limit cooperation with the structure of the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electrical cabinets), so as to prevent the circuit breaker of the present utility model from being installed in the circuit breaker installation cabinet in the closed state, ensuring the personal safety of the operator. After the circuit breaker of the present utility model is installed in the circuit breaker installation cabinet in the opening state and in place, the second locking protrusion 15-0 protruding outside the housing 1 is also used to be opposite to the second locking hole of the circuit breaker installation cabinet and extend into it. The second locking protrusion 15-0 is in limit cooperation with the structure of the circuit breaker installation cabinet. When the operating member 2 is in the closing position, the front link 3-1 is in limit cooperation with the second locking member 15 to prevent it from rotating reversely, so as to prevent the circuit breaker of the present utility model from being pulled out of the circuit breaker installation cabinet in the closed state, which not only ensures the personal safety of the operator, but also ensures the stability and reliability of power use. When the operating member 2 moves from the closing position to the opening position, the second locking member 15 rotates reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1, and the second locking protrusion 15-0 withdraws from the second locking hole, so as to release the limit cooperation with the circuit breaker installation cabinet, then the second locking member 15 will not affect the removal of the circuit breaker of the present utility model from the circuit breaker installation cabinet.

[0083] Further, the second locking protrusion 15-0 is a square protrusion, so as to prevent the second locking protrusion 15-0 from being squeezed when the operating member 2 is in the closing position, causing damage or deformation to the second locking member 15, and preventing the circuit breaker of the present utility model from being directly installed into the circuit breaker installation cabinet.

[0084] Further, when the operating member 2 moves 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, causing the second locking protrusion 15-0 to move towards the inside of the housing 1. Further, the second locking member 15 is driven to rotate reversely by the operating member 2 being pulled in the opening position, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move towards the inside of the housing 1 when the operating member 2 in the opening position is pulled; that is, when the operating member 2 is pulled in the opening position, the operating member 2 simultaneously drives the second locking member 15 to rotate reversely, and the second locking member 15 simultaneously drives the first locking member 14 to move towards the inside of the housing 1.

[0085] As another embodiment, the circuit breaker of the present utility model includes a second locking member return spring that acts on the second locking member 15 to give it a tendency to rotate reversely. When the operating member 2 moves from the closing position to the opening position, the operating member 2 no longer restricts the reverse rotation of the second locking member 15, and the second locking member return spring drives the second locking member 15 to rotate reversely.

[0086] The circuit breaker of the present utility model can be provided with both the first locking member 14 and the second locking member 15, or can be provided with only the first locking member 14 or the first locking member 15.

[0087] As shown in Figure 3-4 Figs. 7-12, the circuit breaker of the present utility model further includes an indicating member 13 provided in the middle of the operating member 2 and having a first indicating position and a second indicating position. The operating member 2 includes an indicating hole 2-1 for cooperating with the indicating member 13; when the operating member 2 moves to the closing position, the indicating member 13 is driven by the indicating member driving structure to rotate to the first indicating position; when the operating member 2 moves to the opening position, the indicating member 13 is driven by the indicating member driving structure to rotate to the second indicating position; that is, the first indicating position and the second indicating position of the indicating member 13 respectively correspond to the closing position and the opening position of the operating member 2 and respectively correspond to the closing state and the opening state of the circuit breaker of the present utility model. The indicating member 13 is provided in the middle of the operating member 2, which is beneficial to improving the structural compactness of the circuit breaker and reducing the overall installation space required for the circuit breaker.

[0088] Further, the indicating member 13 includes an indicating portion 13-0, an indicating member connecting portion 13-1, and an indicating member mounting portion 13-2 that are connected in sequence, as well as a closing actuating portion 13-30 and a tripping actuating portion 13-31 provided on the indicating member mounting portion 13-2; the indicating portion 13-0 of the indicating member 13 is used in cooperation with the indicating hole 2-1 of the operating member 2, and the indicating member 13 is rotatably mounted on the operating member 2 through the indicating member mounting portion 13-2, and the closing actuating portion 13-30 and the tripping actuating portion 13-31 are arranged in sequence along the rotation direction of the indicating member mounting portion 13-2; the indicating member driving structure is implemented by the housing 1 (for example, a driving protrusion provided on the housing 1, and the driving protrusion is inserted between the closing actuating portion 13-30 and the tripping actuating portion 13-31); when the operating member 2 moves to the closing position, the closing actuating portion 13-0 is pressed by the indicating member driving structure to rotate the indicating member 13 to the first indicating position; when the operating member 2 moves to the tripping position, the tripping actuating portion 13-1 is pressed by the indicating member driving structure to rotate the indicating member 13 to the second indicating position.

[0089] As another embodiment, the indicating member 13 does not have a closing actuating portion 13-30 and a tripping actuating portion 13-31, but only has an indicating member actuating portion provided on the indicating member mounting portion 13-2; correspondingly, the indicating member driving structure includes two indicating member driving protrusions, one is a closing driving protrusion and the other is a tripping driving protrusion, and the indicating member actuating portion is inserted between the two indicating member driving protrusions; when the operating member 2 moves to the closing position, the closing driving protrusion presses the indicating member actuating portion to rotate the indicating member 13 to the first indicating position; when the operating member 2 moves to the tripping position, the tripping driving protrusion presses the indicating member actuating portion to rotate the indicating member 13 to the second indicating position.

[0090] As Figure 1 shown, the housing 1 further includes an operating member mounting hole 1-6 for the operating member 2 to be inserted therein, a first jack 1-20 for cooperating with the first terminal 8-0, a second jack 1-21 for cooperating with the second terminal 8-1, a signal jack 1-3 for cooperating with the signal terminal 12, a third jack 1-50 for cooperating with the third terminal 5-0, and a fourth jack 1-51 for cooperating with the fourth terminal 5-1.

[0091] As Figure 1 shown, the housing 1 further includes a signal window 1-4, and the circuit breaker further includes an indicating element connected to the control system 11. The indicating element cooperates with the signal window 1-4 to indicate the state of the circuit breaker, such as the closing and tripping states, fault state, communication state, etc. of the circuit breaker; the signal window 1-4 and the operating member mounting hole 1-6 are provided on the same side wall of the housing 1. Further, the indicating element is an indicator light.

[0092] As Figure 2 、 6As shown in FIGS. 11-12, the housing 1 is further provided with a first opening for the first locking protrusion 14-1 of the first locking member 14 to pass through and a second opening for the second locking protrusion 15-0 of the second locking member 15 to pass through. Further, the first opening and the second opening are the same opening.

[0093] like Figure 1 As shown, the housing 1 also includes an installation guide structure 1-1, which is used to cooperate with the guide structure on the circuit breaker installation cabinet when the circuit breaker of the utility model is installed in the circuit breaker installation cabinet (such as a distribution cabinet, a control cabinet or other electrical cabinet), so that the circuit breaker of the utility model can be installed in place with a correct posture. Further, the installation guide structure 1-1 is a guide rib structure.

[0094] like Figure 2-5 FIG. 1 shows a first embodiment of the operating system.

[0095] The operating system of this embodiment also includes a trigger mechanism 17 connected to the control system 11. The trigger mechanism 17 is triggered by the operating member 2 moving to the closing position and outputs 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 top rod 3-05 drives the moving contact mechanism 4-1 to move to the closed position; that is, when the operating member 2 is operated by an external force to perform a closing operation (that is, when the circuit breaker of the utility model is closed), the operating member 2 triggers the trigger mechanism 17 when it moves from the opening position to the closing position, and the trigger mechanism 17 outputs the first closing signal to the control system 11, and then the control system 11 controls the electromagnetic system 3-0 to operate so that the top rod 3-05 moves from the second position to the first position, and the top rod 3-05 drives the moving contact mechanism 4-1 to move from the opening position to the closing position. Further, during the movement of the operating member 2 to the closing position, the top rod 3-05 remains stationary; that is, during the movement of the operating member 2 from the opening position to the closing position, the top rod 3-05 does not move with the operating member 2, but remains in the second position, and the moving contact mechanism 4-1 also remains in the disconnected position. Further, the trigger mechanism 17 is a micro switch.

[0096] Furthermore, the two ends of the push rod 3-05 are respectively connected to the operating member 2 and the moving contact mechanism 4-1; the push rod 3-05 is driven by the operating member 2 moving to the opening position to move, thereby driving the moving contact mechanism 4-1 to move to the disconnecting position, that is, the operating member 2 moves from the closing position to the opening position and drives the push rod 3-05 to move from the first position to the second position, and the push rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closing position to the disconnecting position, thereby opening the circuit breaker of the utility model; in other words, when the circuit breaker of the utility model is opened, the operating member 2 directly drives the push rod 3-05 to move and the moving contact mechanism 4-1 is driven by the push rod 3-05 to move to the disconnecting position.

[0097] For the operating system of this embodiment, when the operating member 2 moves from the opening position to the closing position for closing operation, the electromagnetic coil of the electromagnetic system 3-0 is involved; when the operating member 2 moves from the closing position to the opening position for opening operation, the electromagnetic coil of the electromagnetic system 3-0 is not involved.

[0098] Specifically, such as Figure 3-5As shown, the operating member 2 includes an operating member main body 2b for external force operation and an operating member connecting portion 2c. One end of the ejector rod 3-05 is engaged with the operating member connecting portion 2c and is relatively movably arranged along the moving direction of the operating member 2 with respect to the operating member connecting portion 2c. The operating member main body 2b is slidably arranged on the housing 1 and one end protrudes outside the housing 1 for external force operation (that is, one end of the operating member 2 protrudes outside the housing 1 for external force operation). Further, the operating member connecting portion 2c includes a connecting portion cavity 2-1c; the ejector rod 3-05 includes a front rod body 3-0500 and a front connecting cap 3-0501. The front connecting cap 3-0501 includes a front brim, and the front brim protrudes radially on one side of the front rod body 3-0500 along the front rod body 3-0500; the front connecting cap 3-0501 is movably arranged in the connecting portion cavity 2-1c, and the side wall of the connecting portion cavity 2-1c (the operating member opening wall) is in driving cooperation with the front brim. When the operating member 2 moves from the closing position to the opening position, the ejector rod 3-05 is driven to move 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 operating member connecting portion 2c further includes a connecting portion insertion hole 2-0c provided on the connecting portion cavity 2-1c; the outer diameter of the front connecting cap 3-0501 is larger than the outer diameter of the front rod body 3-0500. The front rod body 3-0500 is slidably inserted into the connecting portion insertion hole 2-0c and the outer diameter of the front rod body 3-0500 is adapted to the inner diameter of the connecting portion insertion hole 2-0c. The outer diameter of the front connecting cap 3-0501 is larger than the inner diameter of the connecting portion insertion hole 2-0c and is movably arranged in the connecting portion cavity 2-1c. Further, the operating member connecting portion 2c includes a first connecting portion opening and a second connecting portion opening respectively provided on one side thereof. The first connecting portion opening is provided on the radial side of the connecting portion insertion hole 2-0c and is communicated with it. The second connecting portion opening is communicated with the connecting portion cavity 2-1c; the front connecting cap 3-0501 enters the connecting portion cavity 2-1c from the second connecting portion opening and the front rod body 3-0500 enters the connecting portion insertion hole 2-0c from the first connecting portion opening. Further, the operating member connecting portion 2c is a frame structure, which includes a connecting portion first side and a connecting portion second side. The connecting portion first side is connected to the operating member main body 2b. The connecting portion insertion hole 2-0c is provided on the connecting portion second side, and the connecting portion cavity 2-1c is located in the middle of the frame structure of the operating member connecting portion 2c. Further, the operating member 2 further includes an operating member cooperating portion 2p connected to the operating member main body 2b and arranged side by side with the operating member connecting portion 2c; the operating member return spring 18 is a compression spring and is arranged side by side with the operating member connecting portion 2c, one end is engaged with the operating member cooperating portion 2p and the other end is fixedly arranged (for example, fixed on the housing 1).

[0099] As other embodiments, the operating member connecting portion 2c has an L-shaped structure, which includes a connecting portion vertical arm and a connecting portion horizontal arm. One end of the connecting portion vertical arm is connected to the operating member main body 2b, and the other end is bent and connected to the connecting portion horizontal arm. The connecting portion vertical arm, the connecting portion horizontal arm, and the operating member main body 2b enclose a connecting portion cavity 2c. The connecting portion horizontal arm is in driving cooperation with the front brim of the front connecting cap 3-0501. Further, a connecting portion jack 2-0c is provided on the connecting portion horizontal arm. Further, the connecting portion jack 2-0c is provided at the free end of the connecting portion horizontal arm. 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 connecting portion vertical arm.

[0100] As other embodiments, the operating member connecting portion 2c has an L-shaped structure, which includes a connecting portion vertical arm and a connecting portion horizontal arm. One end of the connecting portion vertical arm is connected to the operating member 2b, and the other end is bent and connected to the connecting portion horizontal arm; the connecting rod 3-05 is provided with a connecting rod waist-shaped hole, and the connecting portion horizontal arm is movably inserted into the connecting portion waist-shaped hole; when the operating member 2 moves from the opening position to the closing position, the connecting portion horizontal arm moves in the connecting rod waist-shaped hole, and the connecting rod 3-05 remains stationary.

[0101] Further, the operating member connecting portion 2c is further configured to trigger the trigger mechanism 17. Further, the trigger mechanism 17 and the operating member return spring 18 are respectively arranged on both sides of the operating member connecting portion 2c.

[0102] As other embodiments, the operating system further includes another trigger mechanism - a tripping trigger mechanism, and the tripping trigger mechanism is also connected to the control system 11; during the process of the operating member 2 moving from the closing position to the opening position, the ejector rod 3-05 remains stationary. When the operating member 2 moves to the opening position, the tripping trigger mechanism is triggered, and the tripping trigger mechanism sends a first tripping signal to the control system 11. After receiving the first tripping signal, the control system 11 controls the electromagnetic system 3-0 to operate, and 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 moving contact mechanism 4-1 to move from the closed position to the open position to disconnect from the static contact 4-2.

[0103] Further, the operating mechanism 3 further includes a front connecting rod 3-1. The front connecting rod 3-1 is connected to the operating member 2 and is arranged to move synchronously. The front connecting rod 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 ejector rod 3-0. Further, the front connecting rod 3-1 and the operating member 2 are of a detachable split structure or an integral structure.

[0104] As Figure 1-5 shown, it is the first embodiment of the circuit breaker of the present invention, which includes the operating system of the first embodiment.

[0105] As shown Figure 5 in the figure, when the circuit breaker of this embodiment is closed, the operating member body 2b of the operating member 2 is operated (pressed) by an external force to drive the operating member 2 to move from the open position to the closed position. During the process of the operating member 2 moving from the open position to the closed position, the ejector rod 3-05 remains stationary (as shown Figure 5 (a)-5(b)), when the operating member 2 moves to the closed position (as shown Figure 5 (b)), the trigger mechanism 17 is triggered. When the trigger mechanism 17 is triggered, it sends 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, and the electromagnetic system 3-0 drives the ejector rod 3-05 to move from the second position to the first position (as shown Figure 5 (b)-5(c)). At the same time, the ejector rod 3-05 drives the moving contact mechanism 4-1 to move from the open position to the closed position and close with the static contact 4-2 (as shown Figure 5 (b)-5(c)).

[0106] As shown Figure 5 in the figure, from Figure 5 (c) to 5(a) shows the opening process of the circuit breaker of this embodiment: when the circuit breaker of this embodiment is opened, the operating member body 2b is operated (pulled) by an external force to drive the operating member 2 to move from the closed position to the open position. The operating member 2 simultaneously drives the ejector rod 3-05 to move from the first position to the second position (the operating member connecting portion 2c presses against the front connecting cap 3-0501 of the ejector rod 3-05 through the second side of the connecting portion to make the ejector rod 3-05 move from the first position to the second position). At the same time, the ejector rod 3-05 drives the moving contact mechanism 4-1 to move from the closed position to the open position and disconnect from the static contact 4-2.

[0107] The circuit breaker of this embodiment includes a first locking mechanism, and the first locking mechanism includes a first locking member 14 and a first locking member return spring 16. Further, the circuit breaker of this embodiment further includes an unlocking mechanism 19. The unlocking mechanism 19 is an unlocking rod, and one end of the unlocking rod is in transmission cooperation (directly or indirectly) with the operating member 2 and the other end is in transmission cooperation with the first locking member 14. Specifically. One end (the front end of the unlocking rod) of the unlocking rod abuts against the operating member 2 (that is, the front end of the unlocking rod is in direct transmission cooperation with the operating member 2), the middle part is movably abutted against the abutting protrusion of the housing 1 and is rotatably arranged with the abutting protrusion as a fulcrum, and the other end (the rear end of the unlocking rod) is hinged to the first locking member 14; when the operating member 2 is pulled at the open position, it presses against the front end of the unlocking rod to drive the unlocking rod to rotate with the abutting protrusion as a fulcrum, and the rear end of the unlocking rod drives the first locking member 14 to move towards the inside of the housing 1.

[0108] As other embodiments, one end of the unlocking rod (the front end of the unlocking rod) abuts against the indicating member 13 (that is, the front end of the unlocking rod is indirectly drivingly engaged with the operating member 2 through the indicating member 13), the middle portion thereof is movably abutted against the abutting protrusion of the housing 1 and is rotatably arranged with the abutting protrusion as a fulcrum, and the other end (the rear end of the unlocking rod) is hinged to the first locking member 14; when the operating member 2 is pulled at the opening position, the indicating member 13 presses against the front end of the unlocking rod to drive the unlocking rod to rotate with the abutting protrusion as a fulcrum, and the rear end of the unlocking rod drives the first locking member 14 to move towards the inside of the housing 1.

[0109] As other embodiments, the front end of the unlocking rod is hinged to the operating member 2, the rear end of the unlocking rod is hinged to the first locking member 14, and the middle portion of the unlocking rod abuts against the abutting protrusion; when the operating member 2 is pulled at the opening position, while the operating member 2 drives the unlocking rod to move through the front end of the unlocking rod, the unlocking rod rotates with the abutting protrusion as a fulcrum, and the rear end of the unlocking rod drives the first locking member 14 to move towards the inside of the housing 1.

[0110] The circuit breaker of this embodiment may further include a second locking mechanism, and the second locking mechanism includes a second locking member 15; when the circuit breaker of this embodiment is closed, the second locking member 15 is directly 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 housing 1; when the circuit breaker of this embodiment is opened, the second locking member 15 is directly driven by the operating member 2 to rotate reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1; when the circuit breaker of this embodiment is in the closed state, the operating member 2 is directly in limiting cooperation with the second locking member 15 to limit the reverse rotation of the second locking member 15. Further, when the circuit breaker of this embodiment is closed, the front arm 15-3 of the second locking member of the second locking member 15 is directly driven by the operating member 2 to make the second locking member 15 rotate forward. Further, when the circuit breaker of this embodiment is in the open state, the second locking member 15 is directly driven by the operating member 2 pulled at the opening position to rotate reversely, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move towards the inside of the housing 1; that is, when the circuit breaker of this embodiment is in the open state and the operating member 2 is pulled at the opening position, the operating member 2 simultaneously drives the second locking member 15 to rotate reversely, and the second locking member 15 simultaneously drives the first locking member 14 to move towards the inside of the housing 1.

[0111] Further, when the operating member 2 is at the opening position, there is a free stroke between the operating member 2 and the front connection cap 3-0501 of the ejector rod 3-05, allowing the operating member 2 to move relative to the ejector rod 3-05 towards the outside of the housing 1, so that the operating member 2 can drive the first locking member 14 to move towards the inside of the housing 1 through the unlocking mechanism 9 or the second locking member 15 at the opening position. Specifically, when the operating member 2 is at the opening position, there is a free stroke between the operating member parting wall of the operating member 2 and the front connection cap 3-0501.

[0112] like Figure 6-10 FIG. 1 shows a second embodiment of the operating system.

[0113] In the operating system of this embodiment, the two ends of the top rod 3-05 of the electromagnetic system 3-0 are respectively connected to the operating member 2 and the moving contact mechanism 4-1 by transmission. The operating member 2 switches between the closing position and the opening position, and the moving contact mechanism 4-1 is driven by the top rod 3-05 to switch between the closing position and the opening position. That is, when the operating member 2 moves from the opening position to the closing position, the top rod 3-05 is driven by the operating member 2 and moves from the second position to the first position at the same time, and the moving contact mechanism 4-1 is driven by the top rod 3-05 and moves from the opening position to the closing position at the same time and closes with the static contact 4-2; when the operating member 2 moves from the closing position to the opening position, the top rod 3-05 is driven by the operating member 2 and moves from the first position to the second position at the same time, and the moving contact mechanism 4-1 is driven by the top rod 3-05 and moves from the closing position to the opening position at the same time and disconnects with the static contact 4-2.

[0114] Furthermore, the operating mechanism 3 further includes a front connecting rod 3-1, which is connected to the operating member 2 and is arranged to move synchronously. Further, the front connecting rod 3-1 includes 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 to be connected to the operating member 2, and the front connecting rod driving part 3-11 is used to be connected to the top rod 3-05 by transmission. 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 top rod 3-05, allowing the front connecting rod 3-1 to move to the outside of the housing 1 relative to the top rod 3-05 under the drive of the operating member 2.

[0115] Specifically, the front link driving part 3-11 includes a front link insertion hole 3-111 and a front link cavity 3-110; the ejector rod 3-05 includes a front rod body 3-0500 and a front connection cap 3-0501. The outer diameter of the front connection cap 3-0501 is greater than that of the front rod body 3-0500. The front rod body 3-0500 is slidably inserted into the front link insertion hole 3-111, and the outer diameter of the front rod body 3-0500 is adapted to the inner diameter of the front link insertion hole 3-111. The front connection cap 3-0501 is arranged in the front link cavity 3-110, and the outer diameter of the front connection cap 3-0501 is greater than the inner diameter of the front link insertion hole 3-111. The front link driving part 3-11 includes a front link closing wall and a front link opening wall that are opposite to each other and are respectively located on both sides of the front link cavity 3-110. The front link insertion hole 3-111 is provided on the front link opening wall. When the operating member 2 moves from the opening position to the closing position, the front link closing wall presses against the front connection cap 3-0501 to drive the front link 3-05 to move from the second position to the first position. When the operating member 2 moves from the closing position to the opening position, the front link opening wall presses against the front connection cap 3-0501 to drive the front link 3-05 to move from the first position to the second position. When the operating member 2 is in the opening position, a free stroke is formed between the front link opening wall and the front connection cap 3-0501, allowing the operating member 2 to be pulled relative to the ejector rod 3-05 and move towards the outside of the housing 1. Thus, the operating member 2 drives the first locking member 14 to move towards the inside of the housing 1 through the unlocking mechanism 19 or the second locking member 15. Further, the front link driving part 3-11 further includes a first driving part opening and a second driving part opening respectively provided on one side thereof. The first driving part opening communicates with the front link cavity 3-110, and the second driving part opening communicates with the front link insertion hole 3-111 and is located on the radial side of the front link insertion hole 3-111. The front link cap 3-0501 enters the front link cavity 3-110 through the first driving part opening, and the front rod body 3-0500 enters the front link insertion hole 3-111 through the second driving part opening.

[0116] Specifically, the front link connecting part 3-12 includes a pair of front link connecting walls, and the two front link connecting walls are respectively arranged on both sides of the operating member 2 and connected thereto. Further, the two front link connecting walls are connected to the operating member 2 through a front connecting shaft 3-31 and are respectively located on both sides of the two side walls of the installation cavity 2-2 of the operating member 2. The front connecting shaft 3-31 passes through the indicating member installation part 13-2 of the indicating member 13 and is rotationally matched therewith, that is, the indicating member 13 is rotatably arranged on the operating member 2 through the front connecting shaft 3-31. Operating member shaft holes 2-4 for inserting the front connecting shaft 3-31 are provided on both side walls of the installation cavity 2-2. The front link connecting wall is provided with a front link connecting hole 3-1200 for inserting the front connecting shaft 3-31.

[0117] Such as Figure 1 、 6As shown in FIG. -12, a second embodiment of the circuit breaker of the present utility model is provided, which includes an operating system of the second embodiment.

[0118] When the circuit breaker of this embodiment is closed, the operating member body 2b of the operating member 2 is externally operated (pressed), driving the operating member 2 to move from the open position to the closed position. Meanwhile, the operating member 2 drives the ejector rod 3-05 to move from the second position to the first position through the front connecting rod 3-1. The ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the open position to the closed position to close with the static contact 4-2.

[0119] Furthermore, the operating member 2 and the front connecting rod 3-1 are of a detachable split structure or an integral structure.

[0120] When the circuit breaker of this embodiment is opened, the operating member body 2b is externally operated (pulled), driving the operating member 2 to move from the closed position to the open position. Meanwhile, 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. The ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closed position to the open position to disconnect from the static contact 4-2.

[0121] In the circuit breaker of this 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.

[0122] The circuit breaker of this embodiment includes a first locking mechanism and a second locking mechanism. The first locking mechanism includes a first locking member 14 and a first locking member return spring 16, and the second locking mechanism includes a second locking member 15. Further, when the circuit breaker of this embodiment is closed, the second locking member 15 is driven by the front link 3-1 (the front link 3-1 is arranged to move synchronously with the operating member 2, and the second locking member 15 is driven by the front link 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 housing 1; when the circuit breaker of this embodiment is opened, the second locking member 15 is driven by the front link 3-1 to rotate reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1; when the circuit breaker of this embodiment is in the closed state, the front link 3-1 and the second locking member 15 are in limit cooperation to limit the reverse rotation of the second locking member 15. Further, when the circuit breaker of this embodiment is closed, the front arm 15-3 of the second locking member 15 is driven by the front link 3-1 to make the second locking member 15 rotate forward. Further, when the circuit breaker of this embodiment is in the open state, the second locking member 15 is driven to rotate reversely by the operating member 2 that is pulled at the open position, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move towards the inside of the housing 1; that is, when the circuit breaker of this embodiment is in the open state and the operating member 2 is pulled at the open position, the operating member 2 drives the second locking member 15 to rotate reversely at the same time, and the second locking member 15 drives the first locking member 14 to move towards the inside of the housing 1 at the same time; the operating member 2 can unlock the first locking member 14 and the second locking member 15 at the same time, which is beneficial to improving the operation efficiency and simplifying the structure of the circuit breaker.

[0123] 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 arranged 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 projection 15-0. When the circuit breaker of this embodiment is closed, the second locking member front arm 15-3 is driven by the front link 3-1 to rotate the second locking member 15 forward. Further, the second locking member 15 further includes a second locking member mating portion 15-4 provided on the second locking member front arm 15-3. The second locking member mating portion 15-4 and the second locking projection 15-0 are respectively arranged on both sides of the second locking member front arm 15-3. When the circuit breaker of this embodiment is closed, the second locking member mating portion 15-4 is pressed by the front link 3-1 to rotate the second locking member 15 forward. Further, the second locking member mating portion 15-4 includes a mating portion transition surface 15-41 and a mating portion limiting surface 15-40 that are bent and connected. The front link 3-1 includes a front link first transition surface 3-121, a front link limiting surface 3-122, and a front link second transition surface 3-123 that are connected in sequence. The front link first transition surface 3-121 and the front link second transition surface 3-123 are respectively bent and connected to the front link limiting surface 3-122 and bent toward the same side of the front link limiting surface 3-122 (the side away from the second locking member 15). The mating portion limiting surface 15-40 abuts against the front link limiting surface 3-122 to prevent the second locking member 15 from rotating reversely. The mating portion limiting surface 15-40 and the front link limiting surface 3-122 are both parallel to the moving direction of the front link 3-1. When the circuit breaker of this embodiment is in the open state and the operating member 2 is pulled, the front link second transition surface 3-123 and the front link limiting surface 3-122 sequentially contact the free end of the second locking member front arm 15-3 to drive the second locking member 15-3 to rotate reversely. The front link limiting surface 3-122 is in limit cooperation with the free end of the second locking member front arm 15-3 to prevent the second locking member 15 from rotating forward. When the circuit breaker of this embodiment is closed, the front link first transition surface 3-121 and the front link limiting surface 3-122 respectively contact the mating portion transition surface 15-41 and the mating portion limiting surface 15-40 in sequence to drive the second locking member 15 to rotate forward. 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 transmission cooperation 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 the two 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 actuating portion 14-2; the first locking member actuating portion 14-2 is pressed by the rear arm 15-1 of the second locking member 15 that rotates reversely, thereby driving the first locking member 14 to move into the housing 1; that is, when the circuit breaker of this embodiment is in the tripped state and the operating member 2 is in the tripped position, if the operating member 2 is pulled by an external force and moves outward from 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 actuating portion 14-2 through the rear arm 15-1 of the second locking member, thereby driving the first locking member 14 to move into 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 actuating portion 14-2 is provided on one side of the other end. The first locking member actuating portion 14-2 is a rib, and the protruding direction of the rib is perpendicular to the sliding direction of the first locking member 14 and is the same as the rotation axis of the second locking member 15.

[0124] The following is the third embodiment of the circuit breaker of the present invention.

[0125] The circuit breaker of this embodiment is provided with two triggering mechanisms, one is a closing triggering mechanism, and the other is a tripping triggering mechanism; during the process of the operating member 2 moving to the tripping position or when it moves to the tripping position, the tripping triggering mechanism is triggered, causing an electromagnetic coil of the electromagnetic system 3-0 to be powered on and operate, and 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 moving contact mechanism 4-1 to move from the closed position to the open position; during the process of the operating member 2 moving to the closing position or when it moves to the closing position, the closing triggering mechanism is triggered, causing the other electromagnetic coil of the electromagnetic system 3-0 to be powered on and operate, and the electromagnetic system 3-0 drives the ejector rod 3-05 to move from the second position to the first position. The ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the open position to the closed position; for the circuit breaker of this embodiment, the ejector rod 3-05 is not affected by the movement of the operating member 2, and its movement is only driven by the electromagnetic coil of the electromagnetic system 3-0. Further, the circuit breaker of this embodiment further includes a control system 11 and a sampling device 7. The control system 11 and the sampling device 7 are only used to control the moving contact mechanism 4-1 to move from the closed position to the open position through the electromagnetic system 3-0 when a short circuit and overload fault occur in the circuit where the circuit breaker is located, and are not used for the normal opening and closing control of the circuit breaker.

[0126] The following is the fourth embodiment of the circuit breaker of the present invention.

[0127] The circuit breaker of this embodiment includes at least one set of power supply switch circuits. The power supply switch circuit includes a trigger mechanism 17 and a normally closed switch connected in series in the power supply switch circuit. The power supply switch circuit is connected in series between the power supply of the electromagnetic system 3-0 and the electromagnetic system 3-0. When the circuit breaker of this embodiment is closed, when the operating member 2 moves from the tripping position to the closing position, the trigger mechanism 17 is triggered by the operating member 2 and conducts electricity, and the electromagnetic system 3-0 is powered on to drive the ejector rod 3-05 to move from the second position to the first position, so that the circuit breaker is closed. At the same time, the ejector rod 3-05 directly or indirectly triggers the normally closed switch to make it open, and disconnects the power supply of the electromagnetic system 3-0 and the electromagnetic system 3-0. When the circuit breaker of this embodiment is tripped, the operating member 2 moves from the closing position to the tripping position, and at the same time drives the ejector rod 3-05 to move from the first position to the second position, so that the circuit breaker is tripped. Further, the electromagnetic system 3-0 is also used to implement the short-circuit and / or overload protection function of the circuit breaker of this embodiment. Then, the circuit breaker of this embodiment further includes a control system 11. The control system 11 is electrically connected to the electromagnetic system 3-0. The circuit structure for realizing the electrical connection between the control system 11 and the electromagnetic system 3-0 is connected in parallel with the power supply switch circuit. When the control system 11 detects a short-circuit and / or overload current through the sampling device 7, it drives the electromagnetic system 3-0 to act, so that the ejector rod 3-05 moves from the first position to the second position, and the operating member 2 is reset from the closing position to the tripping position at the same time.

[0128] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0129] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a housing (1), an operating member (2) slidably arranged on the housing (1), an electromagnetic system (3-0) and a moving contact mechanism (4-1) respectively arranged in the housing (1), the electromagnetic system (3-0) comprising a magnetic generating component (3-0m) and a push rod (3-05) movably inserted in the middle of the magnetic generating component (3-0m), one end of the push rod (3-05) cooperating with the operating member (2) and the other end of the push rod (3-05) in transmission cooperation with the moving contact mechanism (4-1); the operating member (2) switches between a closing position and an opening position and drives the moving contact mechanism (4-1) to switch between a closing position and an opening position through the electromagnetic system (3-0), the electromagnetic system (3-0) is energized to work and drives the moving contact mechanism (4-1) to switch between a closing position and an opening position through the push rod (3-05); Features: The circuit breaker further comprises a second locking member (15) rotatably arranged in the housing (1); the second locking member (15) comprises a second locking protrusion (15-0); when the operating member (2) moves from the opening position to the closing position, the second locking member (15) is directly or indirectly driven by the operating member (2) to rotate in the forward direction so that the second locking protrusion (15-0) moves toward the outside of the housing (1); when the operating member (2) moves from the closing position to the opening position, the second locking member (15) rotates in the reverse direction so that the second locking protrusion (15-0) moves toward the inside of the housing (1); when the operating member (2) is in the closing position, the operating member (2) directly or indirectly cooperates with the second locking member (15) to prevent it from rotating in the reverse direction.

2. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a front connecting rod (3-1) connected to the operating member (2) and moving synchronously, and the two ends of the top rod (3-05) are respectively connected to the front connecting rod (3-1) and the moving contact mechanism (4-1) in a transmission manner; when the operating member (2) moves from the opening position to the closing position, the second locking member (15) is driven by the front connecting rod (3-1) to rotate in the forward direction so that the second locking protrusion (15-0) moves toward the outside of the housing (1); when the operating member (2) moves from the closing position to the opening position, the second locking member (15) rotates in the reverse direction so that the second locking protrusion (15-0) moves toward the inside of the housing (1); when the operating member (2) is in the closing position, the front connecting rod (3-1) and the second locking member (15) are limitedly matched to prevent the reverse rotation.

3. The circuit breaker according to claim 1, characterized in that: The operating member (2) switches between the closing position and the opening position, thereby driving the push rod (3-05) to switch between the first position and the second position; the push rod (3-05) switches between the first position and the second position, thereby driving the moving contact mechanism (4-1) to switch between the closing position and the opening position.

4. The circuit breaker according to claim 2, characterized in that: The operating member (2) and the front connecting rod (3-1) are of an integrated or split structure.

5. The circuit breaker according to claim 2, characterized in that: 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 arranged on the housing (1) via 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 is closed, the second locking member front arm (15-3) is driven by the front connecting rod (3-1) to rotate the second locking member (15) in the positive direction.

6. The circuit breaker according to claim 5, characterized in that: The second locking member (15) further comprises a second locking member matching portion (15-4) arranged on the second locking member front arm (15-3), and the second locking member matching portion (15-4) and the second locking protrusion (15-0) are respectively arranged on both sides of the second locking member front arm (15-3); when the circuit breaker is closed, the second locking member matching portion (15-4) is pressed by the front connecting rod (3-1) to cause the second locking member (15) to rotate in the positive direction.

7. The circuit breaker according to claim 5, characterized in that: When the operating member (2) moves from the closing position to the opening position, the second locking member (15) is driven by the front connecting rod (3-1) to rotate in the reverse direction so that the second locking protrusion (15-0) moves toward the inside of the housing (1).

8. The circuit breaker according to claim 7, characterized in that: The second locking member (15) further comprises a second locking member rear arm (15-1), one end of which is connected to the second locking member mounting portion (15-2) and the other end of which is in transmission cooperation with the front connecting rod (3-1).

9. The circuit breaker according to claim 7, characterized in that: The circuit breaker further comprises a first locking member (14) and a first locking member reset spring (16) slidably arranged in the housing (1); the first locking member reset spring (16) acts on the first locking member (14) to make it tend to move toward the outside of the housing (1) and make the first locking protrusion (14-1) of the first locking member (14) protrude outside the housing (1); the first locking member (14) moves toward the inside of the housing (1) when the first locking protrusion (14-1) is squeezed by an external force; the first locking member (14) is driven by the operating member (2) pulled out at the opening position to move toward the inside of the housing (1); the second locking member (15) is driven by the operating member (2) pulled out at the opening position to rotate in the reverse direction; when the operating member (2) at the opening position is pulled out, the first locking member (14) is driven by the reversely rotating second locking member (15) to move toward the inside of the housing (1).

10. The circuit breaker according to claim 9, characterized in that: The first locking member (14) comprises a first locking member actuated portion (14-2); the first locking member actuated portion (14-2) is pressed by a second locking member rear arm (15-1) of a second locking member (15) rotating in the opposite direction, thereby driving the first locking member (14) to move toward the inside of the housing (1).

11. The circuit breaker according to claim 1, characterized in that: The electromagnetic system (3-0) is a magnetic holding system; the magnetic generating component (3-0m) comprises a coil component (3-01), a magnetic yoke (3-03) arranged around the coil component (3-01) and a permanent magnet (3-04); the permanent magnet (3-04) is sleeved on the outer side of the middle part of the coil component (3-01) and is located between the two electromagnetic coils of the coil component (3-01); the electromagnetic system (3-0) also comprises a moving iron core (3-02) slidably arranged in the middle part of the coil component (3-01); the moving iron core (3-02) The iron core (3-02) is connected to the push rod (3-05) and is arranged to move synchronously, and the two ends of the push rod (3-05) respectively protrude on both sides of the axial direction of the coil assembly (3-01); the electromagnetic system (3-0) also includes a first static iron core and a second static iron core that are arranged relatively along the axial direction of the coil assembly (3-01); when one end of the moving iron core (3-02) is attracted to the first static iron core, the push rod (3-05) is in the first position, and when the moving iron core (3-02) is attracted to the second static iron core, the push rod (3-05) is in the second position.

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