Circuit breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and specifically relates to a circuit breaker. A main loop structure of the circuit breaker comprises an operating member, an electromagnetic system, a contact system, an arc extinguishing system, and a control system. The operating member slides back and forth to drive, by means of the electromagnetic system, the contact system to be closed and opened. The control system controls the electromagnetic system to act so as to drive the contact system to be closed and opened. The main loop structure further comprises a sampling device. When an overload and / or short-circuit current flows through the contact system, the electromagnetic system is controlled by the control system to drive the contact system to be opened. The circuit breaker has a simple structure and can be adapted to various current protection thresholds.

Description

breaker

[0001] This application claims priority to Chinese Patent Application No. 202410795683.8, filed on June 19, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of low-voltage electrical appliances, and more specifically to a circuit breaker. Background Technology

[0003] Existing circuit breakers, especially intelligent circuit breakers, generally include a short-circuit protection module, an overload protection module, an operating mechanism, and an electric operating module. The short-circuit and overload protection modules are typically configured according to the circuit breaker's current specifications, while the electric operating module uses a motor and gears for remote operation. Existing circuit breakers suffer from problems such as complex structure, large size, and poor reliability of short-circuit and overload protection. Furthermore, the structure for implementing short-circuit and overload protection functions in existing circuit breakers is complex and occupies a large amount of space. Additionally, the structure used to indicate the open / closed status in existing circuit breakers occupies a large amount of space. Moreover, existing circuit breakers rely solely on mechanical indicating structures to indicate the open / closed status, resulting in poor reliability. Furthermore, existing circuit breakers, especially intelligent circuit breakers, lack necessary locking mechanisms to prevent the circuit breaker from being pulled out of its mounting cabinet (e.g., distribution cabinet, control cabinet, or other electrical enclosure) while closed, and to prevent the circuit breaker from being installed back into its mounting cabinet while closed. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one defect of the prior art and provide a circuit breaker with a simple structure that can be applied to a variety of protection current thresholds.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A circuit breaker includes a housing and a main circuit structure. The main circuit structure includes an operating member slidably mounted on the housing, an electromagnetic system, a contact system, an arc-extinguishing system used in conjunction with the contact system, and a control system connected to the electromagnetic system, all disposed within the housing. The electromagnetic system includes a magnetizing component and a push rod movably inserted into the middle of the magnetizing component. The contact system includes a moving contact mechanism and a stationary contact. The two ends of the push rod are respectively driven to cooperate with the operating member and the moving contact mechanism. The operating member reciprocates to drive the contact system to close and open via the electromagnetic system. The control system controls the electromagnetic system to drive the contact system to close and open.

[0007] The main circuit structure also includes a sampling device coupled to the contact system and connected to the control system. When an overload and / or short-circuit current flows through the contact system, the electromagnetic system is controlled by the control system to drive the contact system to disconnect.

[0008] Furthermore, the moving contact mechanism is rotatably arranged; the circuit breaker also includes a length direction d1, a width direction d2, and a height direction d3; in the length direction d1, the operating element is arranged at one end of the housing, and the sampling device and the arc extinguishing system are arranged at the other end of the housing; the electromagnetic system and the contact system are arranged sequentially between the operating element and the arc extinguishing system along the length direction d1; the sampling device and the arc extinguishing system are arranged side by side along the height direction d3, and the control system includes a circuit board, at least a portion of which is arranged side by side with the electromagnetic system along the height direction d3.

[0009] Furthermore, the circuit board and the contact system and / or arc extinguishing system are arranged side by side along the width direction d2.

[0010] Furthermore, the operating components, electromagnetic system, and sampling device are arranged on the same side of the arc extinguishing system in the height direction d3;

[0011] The main circuit structure also includes a first terminal and a third terminal respectively disposed at both ends of the housing along the length direction d1. The contact system is connected in series between the first terminal and the third terminal. The third terminal and the operating member are arranged side by side along the height direction d3. The electromagnetic system, the arc extinguishing system, the sampling device and the control system are located between the operating member and the first terminal in the length direction d1. The operating member, the electromagnetic system, the sampling device and the first terminal are located on the same side of the third terminal and the arc extinguishing system in the height direction d3.

[0012] Furthermore, the main circuit structure also includes a connecting conductor, the stationary contact is electrically connected to the third terminal through the connecting conductor, the connecting conductor is a conductive plate, and the connecting conductor and the circuit board of the control system are arranged side by side along the width direction d2;

[0013] The control system also includes a first sampling terminal disposed on the circuit board. The first sampling terminal and the connecting conductive plate are located on one side of the circuit board in the width direction d2. The connecting conductive plate is plugged into the first sampling terminal. The connecting conductive plate, the first sampling terminal and the electromagnetic system are arranged side by side in the height direction d3.

[0014] Furthermore, the circuit breaker also includes a secondary circuit structure, which is a straight-through circuit and includes a second terminal, a straight-through conductor, and a fourth terminal connected in series. The second terminal and the first terminal are arranged side by side along the height direction d3, and the fourth terminal and the third terminal are arranged side by side along the width direction d2. The electromagnetic system, contact system, arc extinguishing system, and sampling device are arranged side by side with the straight-through conductor along the height direction d3.

[0015] The control system further includes a second sampling terminal disposed on the circuit board. The through conductor is a through conductive plate. At least a portion of the through conductive plate is arranged side by side with the circuit board of the control system along the width direction d2. This portion is located on one side of the circuit board with the second sampling terminal along the width direction d2 and is plugged into the second sampling terminal. The through conductive plate, the second sampling terminal and the electromagnetic system are arranged side by side along the height direction d3.

[0016] The main circuit structure also includes a signal terminal connected to the control system. The first terminal, the signal terminal, and the second terminal are arranged side by side along the height direction d3.

[0017] Furthermore, along the length direction d1, the first terminal and the third terminal of the main circuit structure are located at one end of the circuit breaker, and the operating element is located at the other end of the circuit breaker.

[0018] Furthermore, the operating element has a closed position and an open position; the main circuit structure also includes a triggering mechanism connected to the control system. The triggering mechanism is triggered by the operating element moving to the closed position to send a first closing signal to the control system. The control system receives the first closing signal and controls the electromagnetic system to drive the contact system to close; the operating element moves from the closed position to the open position and drives the moving contact mechanism to move through the push rod, thereby opening the contact system.

[0019] Furthermore, the push rod remains stationary during the process of the operating component moving from the open position to the closed position; the operating component includes an operating component body and an operating component connecting part, one end of the operating component body protrudes outside the housing for external force operation and the other end is connected to the operating component connecting part; one end of the push rod cooperates with the operating component connecting part and is relatively movable along the length direction d1.

[0020] Furthermore, the operating element has a closed position and an open position. When switching between the closed and open positions, it directly drives the push rod to move, thereby driving the moving contact mechanism to close and open with the stationary contact.

[0021] Furthermore, the circuit breaker also includes a front connecting rod connected to the operating member and moving synchronously thereon, and one end of the top rod is connected to the front connecting rod and moves relative to it along the length direction d1.

[0022] Furthermore, the circuit breaker also includes a rear connecting rod, one end of the top rod is connected to the operating element and the other end is connected to the rear connecting rod and moves synchronously, and the rear connecting rod is also hinged to the contact support of the moving contact mechanism;

[0023] The main circuit structure also includes an operating element reset spring, which acts on the operating element to make it tend to move towards the open position;

[0024] The electromagnetic system is a magnetic holding system; the magnetizing component includes a coil assembly, a magnetic yoke surrounding the coil assembly, and a permanent magnet, with the permanent magnet sleeved on the outer side of the middle of the coil assembly and located between the two electromagnetic coils of the coil assembly; the electromagnetic system also includes a moving iron core slidably disposed in the middle of the coil assembly, the moving iron core being connected to and synchronously moving with a push rod, the two ends of the push rod protruding from both sides of the axial direction of the coil assembly; the electromagnetic system also includes a first stationary iron core and a second stationary iron core disposed opposite to each other along the axial direction of the coil assembly, the push rod being in a first position when one end of the moving iron core is attracted to the first stationary iron core, and in a second position when the moving iron core is attracted to the second stationary iron core;

[0025] The push rod includes a front push rod and a rear push rod. One end of the front push rod is inserted into the moving iron core and the other end is connected to the operating component. One end of the rear push rod is inserted into the moving iron core and the other end is connected to the moving contact mechanism.

[0026] Furthermore, the housing also includes a signal window and an operating element mounting hole respectively disposed on the same side wall of the housing, the signal window and the operating element mounting hole being arranged side by side along the height direction d3; the circuit breaker also includes an indicator element connected to the control system, the indicator element cooperating with the signal window to indicate the status of the circuit breaker;

[0027] The circuit breaker further includes a first locking member and a first locking member return spring that are slidably disposed within the housing along the height direction d3. The first locking member return spring acts on the first locking member, causing it to tend to move outward from the housing and causing the first locking protrusion of the first locking member to protrude outward from the housing. When the first locking protrusion is squeezed by an external force, the first locking member moves inward from the housing. When the circuit breaker is in the open state, the first locking member moves inward from the housing driven by the pulled operating member. The circuit breaker further includes an unlocking mechanism, which is an unlocking rod. One end of the unlocking rod is directly or indirectly driven to the operating member, and the other end is driven to the first locking member.

[0028] Furthermore, the circuit breaker also includes a second locking member rotatably mounted on the housing, the second locking member including a second locking protrusion; when the circuit breaker is closed, the second locking member is driven by the operating member to rotate in the forward direction so that the second locking protrusion protrudes outside the housing; when the circuit breaker is opened, the second locking member rotates in the reverse direction so that the second locking protrusion moves into the housing.

[0029] When the circuit breaker is tripped, the second locking member is driven to rotate in the opposite direction by the operating member that moves toward the tripped position;

[0030] The circuit breaker further includes a first locking member and a first locking member return spring that are slidably disposed on the housing along the height direction d3. The first locking member return spring acts on the first locking member, causing it to tend to move outward of the housing. The first locking protrusion of the first locking member protrudes outward of the housing. When the circuit breaker is in the open state, the first locking member is driven by the pulled operating member to move inward of the housing. The second locking member is in transmission cooperation with the first locking member. When the circuit breaker is open, the first locking member is driven by the reverse-rotating second locking member to move inward of the housing.

[0031] Furthermore, the length a of the shell is 100-150 mm, the width b is 10-60 mm, and the height c is 38-45 mm.

[0032] The circuit breaker of this invention achieves manual and electric opening and closing operations through operating elements, an electromagnetic system, and a control system. It has a simple structure and is easy to operate. The electromagnetic system serves as both the power mechanism for driving the contact system to close and open, and as the mechanism for overload and / or short-circuit protection. Compared to existing circuit breakers, it eliminates the need for bimetallic elements for overload protection and / or electromagnetic trip units for short-circuit protection, thus reducing the number of components, simplifying the circuit breaker's structure, and providing more space for the layout of its components, thereby reducing the overall size of the circuit breaker. Its internal layout is reasonable and compact, further contributing to a reduction in the overall size of the circuit breaker.

[0033] Furthermore, the electromagnetic system serves as both a power mechanism for driving the contact system to close and open, and a mechanism for implementing overload and / or short-circuit protection. Compared to existing circuit breakers, it eliminates the need for bimetallic elements for overload protection and / or electromagnetic trip units for short-circuit protection, which helps reduce the number of components in the circuit breaker, simplifies the circuit breaker's structure, provides more space for the layout of the various components, and thus helps reduce the overall size of the circuit breaker.

[0034] Furthermore, the indicator is rotatably positioned in the middle of the operating component, which improves the structural compactness and saves internal space of the circuit breaker.

[0035] In addition, the signal window is used to indicate the status of the circuit breaker, improving the reliability and accuracy of the indication.

[0036] In addition, the first locking element prevents the circuit breaker from being pulled out of the circuit breaker installation cabinet when it is closed, ensuring power safety, stability and continuity; the second locking element prevents the circuit breaker from being installed into the circuit breaker installation cabinet when it is closed, ensuring the personal safety of the operators. Attached Figure Description

[0037] Figure 1 is a schematic diagram of the circuit breaker of the present invention, showing at least the structure of the housing;

[0038] Figure 2 is a projected view of the circuit breaker of the present invention, showing the structure of the operating system of the first embodiment;

[0039] Figure 3 is a schematic diagram of the structure of the operating system according to the first embodiment of the present invention;

[0040] Figure 4 is an exploded view of the operating system of the first embodiment of the present invention;

[0041] Figure 5 is a cross-sectional view of the operating system of the first embodiment of the present invention, showing the process of the operating system of the first embodiment performing the closing operation;

[0042] Figure 6 is a projected view of the circuit breaker of the present invention, showing the structure of the operating system of the second embodiment;

[0043] Figure 7 is a schematic diagram of the structure of the operating system according to the second embodiment of the present invention;

[0044] Figure 8 is another structural schematic diagram of the operating system according to the second embodiment of the present invention;

[0045] Figure 9 is a cross-sectional schematic diagram of the operating system according to the second embodiment of the present invention;

[0046] Figure 10 is an exploded view of the operating system according to the second embodiment of the present invention;

[0047] Figure 11 is a schematic diagram 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 invention is in the closed state.

[0048] Figure 12 is a schematic diagram showing 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 invention is in the open state and the operating member is pulled.

[0049] The attached drawings illustrate the following: Housing 1: mounting guide structure 1-1, first socket 1-20, second socket 1-21, signal socket 1-3, signal window 1-4, third socket 1-50, fourth socket 1-51, operating component mounting hole 1-6; Operating component 2: operating component body 2b, operating component connecting part 2c, connecting part socket 2-0c, connecting part cavity 2-1c, operating component trigger part 2-0c, operating component mating part 2p, indicator hole 2-1, mounting cavity 2-2, operating component shaft groove 2-3, operating component shaft hole 2-4; Operating mechanism 3: electromagnetic system 3-0, magnetizing assembly 3-0m, coil assembly 3-01, moving iron core 3-02, magnetic yoke 3-03. Permanent magnet 3-04, push rod 3-05, front push rod 3-050, front rod body 3-0500, front connecting cap 3-0501, rear push rod 3-051, rear rod body 3-0510, rear connecting cap 3-0511, front connecting rod 3-1, front connecting rod drive part 3-11, front connecting rod cavity 3-110, front connecting rod insertion hole 3-111, front connecting rod connecting part 3-12, front connecting rod first transition surface 3-121, front connecting rod limiting surface 3-122, front connecting rod second transition surface 3-123, 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 insertion hole 3-21, rear connecting rod connecting hole 3-22, front connecting shaft 3-31, rear connecting shaft 3-32; Contact system 4, moving contact mechanism 4-1, contact support 4-10, support connection hole 4-100, moving contact 4-11, moving contact shaft 4-12, stationary contact 4-2; third terminal 5-0, fourth terminal 5-1; arc extinguishing system 6; sampling device 7; first terminal 8-0, second terminal 8-1; secondary circuit structure 9; first sampling terminal 10-0, second sampling terminal 10-1; control system 11, circuit board 11p, first sampling terminal 11-0, second sampling terminal 11-1; signal terminal 12; indicator 13, indicator part 13-0, indicator connecting part 13-1, indicator mounting part 13-2, first driven part of indicator 13-30, second driven part of indicator 13-31; first locking member 14, first locking protrusion 14-1, first locking member driven part 14-2; Second locking member 15, second locking protrusion 15-0, second locking member rear arm 15-1, second locking member mounting part 15-2, second locking member forearm 15-3, second locking member mating part 15-4, mating part transition surface 15-41, mating part limiting surface 15-40; first locking member return spring 16; triggering mechanism 17; operating member return spring 18; unlocking mechanism 19; connecting conductor 20. Detailed Implementation

[0050] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions in the following embodiments.

[0051] As shown in Figures 1-2 and 6, the circuit breaker of the present invention includes a housing 1 and a main circuit structure. The main circuit structure includes an operating member 2 slidably disposed on the housing 1, and an operating mechanism 3, a contact system 4, an arc extinguishing system 6, and a control system 11, all disposed within the housing 1. The operating member 2 has an open position and a closed position, and switches between the open and closed positions by reciprocating sliding. The operating mechanism 3 includes an electromagnetic system 3-0, which includes a magnetizing component 3-0m and a push rod 3-05 movably inserted in the middle of the magnetizing component 3-0m. The push rod 3-05 has a first position and a second position, and switches between the first and second positions by reciprocating movement. The contact system 4 includes a moving contact mechanism 4-1 and a stationary contact 4-2 used in conjunction. The moving contact mechanism 4-1 has a closed position and an open position. When the moving contact mechanism 4-1 is in the closed position, it is closed with the stationary contact 4-2 (i.e., the contact system 4 is in the closed state). When the moving contact mechanism 4-1 is in the open position, it is disconnected from the stationary contact 4-2 (i.e., the contact system 4 is in the open state). One end of the push rod 3-05 is connected to the moving contact mechanism 4-1 in a driving manner. The push rod 3-05 switches between a first position and a second position, thereby driving the moving contact mechanism 4-1 to switch between the closed and open positions. The arc extinguishing system 6 works in conjunction with the contact system 4 to extinguish the electric arc generated when the contact system 4 closes and opens. The operating element 2 switches between the closed position and the open position, thereby driving the moving contact mechanism 4-1 to switch between the closed position and the open position through the electromagnetic system 3-0, thus switching the contact system 4 between the closed state and the open state, that is, switching the circuit breaker of the present invention between the closed state and the open state. The electromagnetic system 3-0 operates under the control of the control system 11, driving the push rod 3-05 to switch between a first position and a second position. This, in turn, causes the push rod 3-05 to switch the moving contact mechanism 4-1 between a closed position and an open position. Clearly, in the circuit breaker of this invention, the closing position of the operating element 2, the first position of the push rod 3-05, the closed position of the moving contact mechanism 4-1, the closed state of the contact system 4, and the closed state of the circuit breaker correspond to each other. Conversely, the opening position of the operating element 2, the second position of the push rod 3-05, the open position of the moving contact mechanism 4-1, the open state of the contact system, and the open state of the circuit breaker correspond to each other. Furthermore, both ends of the push rod 3-05 are respectively engaged in transmission with the operating element 2 and the moving contact mechanism 4-1.

[0052] Specifically, as shown in Figures 1-2, 6, and 11-12, the two ends of the top rod 3-05 are respectively connected to the operating component 2 and the moving contact mechanism 4-1; one end of the operating component 2 is inserted into the housing 1 and the other end protrudes outside the housing 1 for operation by external force. The external force can drive the contact system 4 to close and open (that is, drive the circuit breaker to close and open) by pressing and pulling the operating component 2.

[0053] Specifically, as shown in Figures 2-8 and 10, the moving contact mechanism 4-1 includes a contact support 4-10 and a moving contact 4-11 supported on the contact support 4-10. Further, the moving contact mechanism 4-1 is rotatably mounted via the contact support 4-10. Further, the moving contact mechanism 4-1 also includes a contact spring (not shown in the accompanying drawings); the contact support 4-1 is rotatably mounted on the housing 1 via a moving contact shaft 4-12, and the moving contact 4-11 is rotatably mounted relative to the contact support 4-10. This allows the contact support 4-10 to continue rotating relative to the moving contact 4-11 at a certain angle after the moving contact 4-11 is closed with the stationary contact 4-2, so that the contact spring applies a force to the moving contact 4-11 to press it against the stationary contact 4-2, ensuring reliable contact between the two.

[0054] In another embodiment, the moving contact mechanism 4-1 is configured to move as a whole, and the moving contact mechanism 4-1 switches between a closed position and an open position by reciprocating movement in order to close and open with the stationary contact 4-2.

[0055] Furthermore, 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 repulsion between moving and stationary contacts and improve the current flow capacity.

[0056] Furthermore, the operating mechanism 3 also includes a rear connecting rod 3-2, which is connected to one end of the top rod 3-05 of the electromagnetic system 3-0 and hinged to the contact support 4-11. The axis of the hinge shaft between the rear connecting rod 3-2 and the contact support 4-11 is parallel to and spaced apart from the rotation axis of the moving contact mechanism 4-1.

[0057] Specifically, the rear connecting rod 3-2 is provided with a rear connecting rod cavity 3-20 and a rear connecting rod insertion hole 3-21. The rear connecting rod insertion hole 3-21 is located on the side wall of the rear connecting rod cavity 3-20 (this side wall is close to the magnetizing component 3-0m of the magnetic holding system 3-0). The rear rod body 3-0510 of the top rod 3-05 is inserted into the rear connecting rod insertion hole 3-21, and the outer diameter of the rear rod body 3-0510 is adapted to the inner diameter of the rear connecting rod insertion hole 3-21. The rear connecting cap 3-0511 of the top rod 3-05 is located in the rear connecting rod cavity 3-20 and the rear connecting... The outer diameter of the connector cap 3-0511 is larger than the inner diameter of the rear connecting rod insertion hole 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 provided on one side thereon. 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 insertion hole 3-21. The rear rod body 3-0510 enters the rear connecting rod insertion hole 3-21 through the second rear connecting rod opening, and the rear connector cap 3-0511 enters the rear connecting rod cavity 3-20 through the first rear connecting rod opening.

[0058] Specifically, the rear connecting rod 3-2 is hinged to the contact support 4-11 via a rear connecting shaft 3-32. Further, in the rear connecting rod 3-2 and the contact support 4-11, the connecting shaft 3-32 is mounted on one and moves synchronously with it, while the other has an oblong hole that mates with the rear connecting shaft 3-32. Further, the rear connecting rod 3-2 has a rear connecting rod connecting hole 3-22 for insertion and adaptation of the rear connecting shaft 3-32. The rear connecting shaft 3-32 is inserted into the rear connecting rod connecting hole 3-22 and moves synchronously with the rear connecting rod 3-2. The contact support 4-11 has an oblong hole, which is a support connecting hole 4-100 for insertion of the rear connecting shaft 3-32.

[0059] In another embodiment, the push rod 3-05 can also be directly hinged to the contact support 4-11. The detailed connection method between the two can be achieved by existing technology and will not be described in detail here.

[0060] Furthermore, the main circuit structure also includes a sampling device 7 coupled to the contact system 4 (i.e., 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 (i.e., when 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 work and drives the push 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 the power mechanism for driving the contact system 4 to close and open and as the mechanism for realizing overload and / or short-circuit protection. Compared with existing circuit breakers, the bimetallic element used for overload protection and / or the electromagnetic tripping mechanism used for short-circuit protection can be eliminated, which is beneficial to reducing the number of components in the circuit breaker, simplifying the structure of the circuit breaker, providing more space for the layout of the various components of the circuit breaker, and thus helping to reduce the overall size and specifications of the circuit breaker. In the circuit breaker of the present invention, when overload and short-circuit currents flow through the contact system 4, the control system 11 controls the electromagnetic system 3-0 to work and drive the push rod 3-05 to move from the first position to the second position; that is, the electromagnetic system 3-0 simultaneously serves as a mechanism for overload protection and short-circuit protection.

[0061] Specifically, the sampling device 7 is a manganese-copper shunt connected in series with the contact system 4 (i.e., connected in series with the moving contact mechanism 4-1); or, the sampling device 7 is a current transformer coupled to the contact system 4 (i.e., coupled to the moving contact mechanism 4-1), for example, the current transformer can be coupled to the contact system 4 by being sleeved on a conductor connected in series with the contact system 4. In the circuit breaker of the present invention, the sampling device 7 is preferably a manganese-copper shunt.

[0062] Furthermore, the main circuit structure also includes a first terminal 8-0 and a third terminal 5-0, with the first terminal 8-0, contact system 4, and third terminal 5-0 connected in series. Furthermore, the third terminal 5-0, stationary contact 4-2, moving contact mechanism 4-1, and first terminal 8-0 are connected in series.

[0063] Specifically, the first terminal 8-0 is the input terminal of the main circuit structure, and the third terminal 5-0 is the output terminal of the main circuit structure; the sampling device 7 is a manganese copper shunt; the third terminal 5-0, the stationary contact 4-2, the moving contact mechanism 4-1, the sampling device 7 and the first terminal 8-0 are connected in series; or, the third terminal 5-0, the sampling device 7, the stationary contact 4-2, the moving contact mechanism 4-1 and the first terminal 8-0 are connected in series.

[0064] Furthermore, the main circuit structure also includes a connecting conductor 20, through which the stationary contact 4-2 is electrically connected to the third terminal 5-0.

[0065] Furthermore, the main circuit structure also includes a signal terminal 12 connected to the control system 11. The control system 11 communicates with external devices 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.

[0066] Furthermore, the circuit breaker of the present invention also includes a secondary circuit structure 9 disposed within the housing 1. The secondary circuit structure 9 is a direct-through circuit. A "direct-through circuit" refers to a circuit structure in which there are no operable breaks (e.g., no breaks achieved by moving and stationary contacts; the break is closed when the moving and stationary contacts are closed, and open when they are open) and which can be directly connected to an external circuit. Furthermore, the secondary circuit structure 9 includes a second terminal 8-1, a direct-through conductor, and a fourth terminal 5-1 connected in series. Furthermore, the direct-through conductor is a conductive plate or a flexible conductor. It should be noted that the circuit breaker of the present invention can be configured with only a main circuit structure, in which case the circuit breaker is a single-phase circuit breaker (i.e., a 1P type circuit breaker); the circuit breaker of the present invention can also be configured with both a main circuit structure and a secondary circuit structure, in which case the circuit breaker is a two-phase circuit breaker (i.e., a 1P+1N type circuit breaker). Alternatively, multiple circuit breakers of this embodiment can be arranged side by side, with the circuit breaker's operating components and operating system working in tandem to realize two-phase (2P type circuit breaker) or multi-phase (3P or 4P) circuit breakers.

[0067] Specifically, the second terminal 8-1 is the incoming terminal of the secondary circuit structure 9, and the fourth terminal 5-1 is the outgoing terminal of the secondary circuit structure 9.

[0068] As shown in Figures 2 and 6, the control system 11 includes a circuit board 11p.

[0069] Furthermore, the control system 11 also includes a first sampling terminal 11-0 connected to the circuit board 11p. The first sampling terminal 11-0 is electrically connected to the connecting conductor 20 to detect the voltage signal, current signal, and on / off status of the main circuit structure, thereby determining the current state of the circuit breaker of the present invention. Furthermore, the connecting conductor 20 is a conductive plate, and the first sampling terminal 11-0 is disposed on the circuit board 11p, with the conductive plate and the first sampling terminal 11-0 being plugged into each other.

[0070] Furthermore, the control system 11 also includes a second sampling terminal 11-1 electrically connected to the circuit board 11p and the through conductor, respectively, for detecting the voltage and current signals of the secondary circuit structure. Further, the through conductor is a conductive plate, and the second sampling terminal 11-1 is disposed on the circuit board 11p, with the conductive plate and the second sampling terminal 11-1 being plugged into each other.

[0071] As shown in Figure 2-10, the electromagnetic system 3-0 is a magnetic holding system.

[0072] Furthermore, the magnetizing component 3-0m includes a coil component 3-01, a magnetic yoke 3-03 surrounding 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 located between the two electromagnetic coils of the coil component 3-01. The electromagnetic system 3-0 also includes a moving iron core 3-02 slidably disposed in the middle part of the coil component 3-01. The moving iron core 3-02 is connected to and synchronously moved by a push rod 3-05. The two ends of the push rod 3-05 protrude from both sides of the axial direction of the coil component 3-01. The electromagnetic system 3-0 also includes a first stationary iron core and a second stationary iron core disposed opposite to each other along the axial direction of the coil component 3-01. When one end of the moving iron core 3-02 is attracted to the first stationary iron core, the push rod 3-05 is in the first position. When the moving iron core 3-02 is attracted to the second stationary iron core, the push rod 3-05 is in the second position. The push rod 3-05 reciprocates along the axial direction of the coil component 3-01, switching between the first position and the second position. Furthermore, the magnetic yoke 3-03 has a square frame structure, and the first stationary iron core and the second stationary iron core are served by a pair of sidewalls of the magnetic yoke 3-03. Furthermore, the magnetic yoke 3-03 includes a U-shaped magnetic yoke seat and a magnetic yoke end plate. The open end of the U-shaped structure of the magnetic yoke seat is connected to the magnetic yoke end plate. The magnetic yoke end plate and the bottom plate of the U-shaped structure of the magnetic yoke seat serve as the first stationary iron core and the other as the second stationary iron core.

[0073] It should be noted that the electromagnetic system 3-0 can also adopt other existing magnetic holding systems with different structural types. For example, an existing magnetic holding system differs from this embodiment in that it includes two sets of permanent magnets, which are respectively fitted around the outer ends of the coil assembly 3-01 along its axial direction, and the electromagnetic coil of the coil assembly 3-01 is located between the two sets of permanent magnets.

[0074] 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 into the moving iron core 3-02 and the other end protrudes outward from the axial end of the electromagnetic coil and is connected to the operating member 2 in a transmission manner. One end of the rear push rod 3-051 is inserted into the moving iron core 3-02 and the other end protrudes outward from the axial end of the electromagnetic coil and is connected to the moving contact mechanism 4-1 in a transmission manner.

[0075] 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, it is inserted into the moving iron core 3-02 from one axial end). 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, it is inserted into the moving iron core 3-02 from the other axial end). Furthermore, the front rod body 3-0500 and the front connecting cap 3-0501 are either an integral structure or a detachable split structure; the rear rod body 3-0510 and the rear connecting cap 3-0511 are either an integral structure or a detachable split structure.

[0076] As shown in Figures 2, 6, and 11-12, the circuit breaker of the present invention further includes a first locking member 14 and a first locking member return spring 16 slidably disposed in the housing 1 along the direction d3. The first locking member return spring 16 acts on the first locking member 14, causing it to tend to move outward from the housing 1 and causing the first locking protrusion 14-1 of the first locking member 14 to protrude outward from the housing 1. When the first locking protrusion 14-1 is squeezed by an external force, the first locking member 14 moves inward from the housing 1 (that is, when the first locking protrusion 14-1 is squeezed by an external force, it drives the first locking member 14 as a whole to move inward from the housing 1). When the circuit breaker is in the open state, the first locking member 14 is driven to move inward from the housing 1 by the pulled operating member 2. That is, when the circuit breaker is in the open state, the operating member 2 is pulled in the open position and drives the first locking member 14 to move inward from the housing 1.

[0077] When the circuit breaker of the present invention is installed in a circuit breaker mounting cabinet (such as a distribution cabinet, control cabinet or other electrical cabinet) in actual use, the first locking protrusion 14-1 is squeezed into the housing 1 by the structure of the circuit breaker mounting cabinet, which will not affect the designated position of the circuit breaker in the circuit breaker mounting cabinet. After the circuit breaker is installed in the designated position, the first locking protrusion 14-1 will be opposite to the first locking hole provided at the designated position of the circuit breaker mounting cabinet and move out of the housing 1 to insert into the first locking hole, thereby cooperating with the limit of the circuit breaker mounting cabinet, so that the circuit breaker will not be pulled out of the designated position of the circuit breaker mounting cabinet when it is closed, which not only ensures the personal safety of the operator, but also ensures the reliability and stability of the power supply.

[0078] As shown in Figures 5 and 11-12, the circuit breaker of the present invention further includes a second locking member 15 rotatably disposed within the housing 1. The second locking member 15 includes a second locking protrusion 15-0. When the operating member 2 moves from the open position to the closed position, the second locking member 15 is directly or indirectly driven by the operating member 2 to rotate in the forward direction, causing the second locking protrusion 15-0 to move towards the outside of the housing 1. When the operating member 2 moves from the closed position to the open position, the second locking member 15 rotates in the reverse direction, causing the second locking protrusion 15-0 to move towards the inside of the housing 1. When the operating member 2 is in the closed position, the operating member 2 directly or indirectly restricts the reverse rotation of the second locking member 15.

[0079] When the operating member 2 moves from the open position to the closed position, the second locking member 15 is driven by the operating member 2 to rotate forward, causing the second locking protrusion 15-0 to move outward of the housing 1. The second locking protrusion 15-0 is used to engage with the structural limit of the circuit breaker mounting cabinet (e.g., distribution cabinet, control cabinet, or other electrical cabinet), thereby preventing the circuit breaker of the present invention from being installed in the circuit breaker mounting cabinet in the closed state, ensuring the personal safety of the operator. After the circuit breaker of the present invention is installed in the circuit breaker mounting cabinet in the open state and is in place, the second locking protrusion 15-0 protruding outside the housing 1 is also used to be opposite to and extend into the second locking hole of the circuit breaker mounting cabinet. When the operating member 2 is in the closed position, the front connecting rod 3-1 and the second locking member 15 engage in a limiting engagement to prevent reverse rotation, thereby preventing the circuit breaker of the present invention from being pulled out of the circuit breaker installation cabinet in the closed state. This ensures both the personal safety of the operator and the stability and reliability of the power supply. When the operating member 2 moves from the closed position to the open position, the second locking member 15 rotates in the reverse direction, causing the second locking protrusion 15-0 to move into the housing 1. The second locking protrusion 15 exits from the second locking hole, thereby releasing the limiting engagement with the circuit breaker installation cabinet. Thus, the second locking member 15 will not affect the removal of the circuit breaker of the present invention from the circuit breaker installation cabinet.

[0080] Furthermore, the second locking protrusion 15-0 is a square protrusion, thereby preventing the second locking member 15 from being damaged or deformed by being squeezed when the operating member 2 is in the closed position, thus avoiding the situation where the circuit breaker of the present invention is directly installed into the circuit breaker installation cabinet.

[0081] Furthermore, when the operating member 2 moves from the closed position to the open position, the second locking member 15 is directly or indirectly driven by the operating member 2 to rotate in the reverse direction, causing the second locking protrusion 15-0 to move into the housing 1. Furthermore, the second locking member 15 is driven to rotate in the reverse direction by the operating member 2 when it is pulled out in the open position, and the first locking member 14 is driven to move into the housing 1 by the reverse-rotating second locking member 15 when the operating member 2 is pulled out in the open position; that is, when the operating member 2 is pulled out in the open position, the operating member 2 simultaneously drives the second locking member 15 to rotate in the reverse direction, and the second locking member 15 simultaneously drives the first locking member 14 to move into the housing 1.

[0082] In another embodiment, the circuit breaker of the present invention includes a second locking member reset spring that acts on the second locking member 15 to give it a tendency to rotate in the reverse direction. When the operating member 2 moves from the closed position to the open position, the operating member 2 no longer restricts the second locking member 15 from rotating in the reverse direction, and the second locking member reset spring drives the second locking member 15 to rotate in the reverse direction.

[0083] The circuit breaker of the present invention may be provided with both the first locking element 14 and the second locking element 15, or may be provided with only the first locking element 14 or the first locking element 15.

[0084] As shown in Figures 3-4 and 7-12, the circuit breaker of the present invention further includes an indicator 13 disposed in the middle of the operating member 2, having a first indicating position and a second indicating position. The operating member 2 includes an indicator hole 2-1 that cooperates with the indicator 13. When the operating member 2 moves to the closed position, the indicator 13 is driven by the indicator driving structure to rotate to the first indicating position. When the operating member 2 moves to the open position, the indicator 13 is driven by the indicator driving structure to rotate to the second indicating position. That is, the first indicating position and the second indicating position of the indicator 13 correspond to the closed position and the open position of the operating member 2, respectively, and correspond to the closed state and the open state of the circuit breaker of the present invention, respectively. The indicator 13 is disposed in the middle of the operating member 2, which helps to improve the structural compactness of the circuit breaker and reduce the overall installation space required for the circuit breaker.

[0085] Furthermore, the indicator 13 includes an indicator part 13-0, an indicator connecting part 13-1, and an indicator mounting part 13-2 connected in sequence, as well as a closing actuator part 13-30 and a opening actuator part 13-31 disposed on the indicator mounting part 13-2; the indicator 13-0 cooperates with the indicator hole 2-1 of the operating member 2, and the indicator 13 is rotatably mounted on the operating member 2 through the indicator mounting part 13-2, with the closing actuator part 13-30 and the opening actuator part 13-31 along the indicator mounting part 13-2. The rotation directions are arranged sequentially; the indicator drive structure is implemented by the housing 1 (for example, a drive protrusion is provided on the housing 1, and the drive protrusion is inserted between the closing driven part 13-30 and the opening driven part 13-31); when the operating member 2 moves to the closing position, the closing driven part 13-0 is pressed by the indicator drive structure, causing the indicator 13 to rotate to the first indicator position; when the operating member 2 moves to the opening position, the opening driven part 13-1 is subjected to the low pressure of the indicator drive structure, causing the indicator 13 to rotate to the second indicator position.

[0086] In another embodiment, the indicator 13 does not have a closing actuator 13-30 and a opening actuator 13-31, but only an indicator actuator is provided on the indicator mounting part 13-2; correspondingly, the indicator driving structure includes two indicator driving protrusions, one for closing and the other for opening, with the indicator actuator inserted between the two indicator driving protrusions; when the operating member 2 moves to the closing position, the closing driving protrusion presses against the indicator actuator, causing the indicator 13 to rotate to the first indicating position; when the operating member 2 moves to the opening position, the opening driving protrusion presses against the indicator actuator, causing the indicator 13 to rotate to the second indicating position.

[0087] As shown in Figure 1, the housing 1 also includes an operating component mounting hole 1-6 for the operating component 2 to be inserted therein, a first insertion hole 1-20 that mates with the first terminal 8-0, a second insertion hole 1-21 that mates with the second terminal 8-1, a signal insertion hole 1-3 that mates with the signal terminal 12, a third insertion hole 1-50 that mates with the third terminal 5-0, and a fourth insertion hole 1-51 that mates with the fourth terminal 5-1.

[0088] As shown in Figure 1, the housing 1 also includes a signal window 1-4, and the circuit breaker also includes an indicator element connected to the control system 11. The indicator element cooperates with the signal window 1-4 to indicate the status of the circuit breaker, such as the circuit breaker's closing / opening status, fault status, communication status, etc. The signal window 1-4 and the operating component mounting hole 1-6 are located on the same side wall of the housing 1. Furthermore, the indicator element is an indicator light.

[0089] As shown in Figures 2, 6, and 11-12, the housing 1 is further provided with a first opening through which the first locking protrusion 14-1 of the first locking member 14 passes and a second opening through which the second locking protrusion 15-0 of the second locking member 15 passes. Furthermore, the first opening and the second opening are the same opening.

[0090] As shown in Figure 1, the housing 1 further includes an installation guide structure 1-1, which cooperates with the guide structure on the circuit breaker installation cabinet (e.g., distribution cabinet, control cabinet, or other electrical cabinet) when the circuit breaker of the present invention is installed in the circuit breaker installation cabinet, so that the circuit breaker of the present invention is installed in the correct position. Further, the installation guide structure 1-1 is a guide rib structure.

[0091] Figures 1-2 and 6 show one layout of the circuit breaker of the present invention.

[0092] The circuit breaker of the present invention includes a length direction d2, a width direction d2, and a height direction d3, that is, the length direction, width direction, and height direction of the circuit breaker are respectively the length direction d1, the width direction d2, and the height direction d3, and the length direction d1, the width direction d2, and the height direction d3 are perpendicular to each other. Along the length direction d1, the operating member 2 is arranged at one end of the housing 1, and the sampling device 7 and the arc extinguishing system 6 are arranged at the other end of the housing 1; the electromagnetic system 3-0 and the contact system 4 are arranged sequentially between the operating member 2 and the arc extinguishing system 6 along the length direction d1; the sampling device 7 and the arc extinguishing system 6 are arranged side by side along the height direction d3, and at least a portion of the circuit board 11p of the control system 11 is arranged side by side with the electromagnetic system 3-0 along the height direction d3.

[0093] The circuit breaker of the present invention adopts the above-described layout, which is compact and reasonable, and is conducive to reducing the overall size of the circuit breaker, thus conforming to the development trend of circuit breaker miniaturization.

[0094] Furthermore, the operating element 2, the electromagnetic system 3-0, and the sampling device 7 are arranged on the same side of the arc-extinguishing system 6 in the height direction d3; that is, in the height direction d3, the operating element 2, the electromagnetic system 3-0, and the sampling device 7 are on the same side relative to the side where the arc-extinguishing system 6 is located, and the operating element 2, the electromagnetic system 3-0, and the sampling device 7 are arranged on the same side inside the housing 1. The above layout facilitates the wiring between the control system 11 and the electromagnetic system 3-0, as well as the coupling between the sampling device 7 and the contact system 4, further simplifying the internal layout of the circuit breaker of the present invention.

[0095] Furthermore, the circuit board 11p is arranged side-by-side with the contact system 4 and / or the arc-extinguishing system 6 along the width direction d2; in the circuit breaker of the present invention, the circuit board 11p is arranged side-by-side with the contact system 4 and the arc-extinguishing system 6 along the width direction d2. It should be noted that whether the circuit board 11p is arranged side-by-side with the contact system 4 and the arc-extinguishing system 6 along the width direction d2 can be adjusted according to the specific dimensions of the circuit board 11p.

[0096] Specifically, as shown in Figures 1-2 and 6, the vertical direction in Figure 1 represents the length direction d1, the inward and outward direction in Figure 1 represents the width direction d2, and the horizontal direction in Figure 1 represents the height direction d3. The operating component 2 is located at the upper end of the housing 1, and the sampling device 7 and the arc-extinguishing system 6 are located at the lower end of the housing 1. The sampling device 7 and the arc-extinguishing system 6 are arranged side by side along the horizontal direction. At least a portion of the circuit board 11p of the control system 11 and the electromagnetic system 3-0 are arranged side by side along the horizontal direction. The operating component 2, the electromagnetic system 3-0, and the sampling device 7 are all arranged to the right of the arc-extinguishing system 6; that is, in the horizontal direction, the electromagnetic system 3-0 is located to the right of the circuit board 11p of the control system 11, and the sampling device 7 is located to the right of the arc-extinguishing system 6. The sampling component 2, the electromagnetic system 3-0, and the sampling device 7 are all arranged on the right side inside the housing 1.

[0097] In another embodiment, the operating element 2, the electromagnetic system 3-0, and the sampling device 7 are all arranged on the left side of the arc extinguishing system 6, that is, the components inside the circuit breaker are arranged in a mirror manner with this embodiment.

[0098] Furthermore, the first terminal 8-0 and the third terminal 5-0 are respectively disposed at both ends of the housing 1 along the length direction d1. The third terminal 5-0 and the operating member 2 are disposed side by side along the direction d3. The electromagnetic system 3-0, the arc extinguishing system 6, the sampling device 7 and the control system 11 are located between the operating member 2 and the first terminal 8-0 in the length direction d1. That is, the operating member 2 and the first terminal 8-0 are located at the two ends of the housing 1 that are furthest apart in the length direction d1. The operating member 2, the electromagnetic system 3-0, the sampling device 7 and the first terminal 8-0 are located on the same side of the third terminal 5-0 and the arc extinguishing system 6 in the height direction d3.

[0099] Specifically, as shown in Figures 2 and 6, the operating component 2 and the third terminal 5-0 are both located at the top of the housing 1, the third terminal 5-0 is located on the left side of the operating component 2, the first terminal 8-0 is located at the bottom of the housing 1, the electromagnetic system 3-0 and the sampling device 7 are arranged from top to bottom between the operating component 2 and the first terminal 8-0, and the third terminal 5-0, the control system 11 and the arc extinguishing system 6 are arranged sequentially from top to bottom.

[0100] In another embodiment, along the length direction d1, the first terminal 8-0 and the third terminal 5-0 are disposed at one end of the circuit breaker, and the operating member 2 is disposed at the other end of the circuit breaker; that is, the first terminal 8-0 and the third terminal 5-0 are disposed on the same end of the circuit breaker. Furthermore, the first terminal 8-0 and the third terminal 5-0 are arranged side-by-side at intervals along the height direction d3.

[0101] Furthermore, the third socket 1-50, the fourth socket 1-51, the signal window 1-4, and the operating component mounting hole 1-6 are all located on the same side wall of the housing 1, and the third socket 1-50, the fourth socket 1-51, and the signal window 1-4 are arranged in a triangular shape; in the direction d3, the fourth socket 1-51 is farthest from the operating component socket 1-6, and the signal window 1-4 is closest to the operating component socket 1-6; in the width direction d2, the fourth socket 1-51 and the signal window 1-4 are located on the same side of the third socket 1-50.

[0102] Furthermore, the connecting conductor 20 of the main circuit structure and the circuit board 11p of the control system 11 are arranged side by side along the width direction d2. The first sampling terminal 11-0 and the connecting conductor 20 are located on the same side of the circuit board 11p. The first sampling terminal 11-0, the connecting conductor 20 and the electromagnetic system 3-0 are arranged side by side along the height direction d3. The above layout design is beneficial to reducing the height of the circuit breaker of the present invention. Moreover, the thickness of the circuit board 11p itself is also limited. The side-by-side arrangement of the connecting conductor 20 and the circuit board 11p also makes full use of the space of the housing 1 in the width direction d2. The side-by-side arrangement of the first sampling terminal 11-0, the connecting conductor 20 and the electromagnetic system 3-0 in the height direction d3 also makes full use of the space of the housing 1 in the height direction d3.

[0103] Furthermore, the second terminal 8-1 of the secondary circuit structure 9 and the first terminal 8-0 of the main circuit structure are arranged side by side along the height direction d3, and the second terminal 8-1 and the first terminal 8-0 are arranged at the same end of the housing 1 in the direction d1. Furthermore, the signal terminal 12 of the main circuit structure is located between the first terminal 8-0 and the second terminal 8-1 in the direction d3, and the signal terminal 12, the first terminal 8-0, and the second terminal 8-1 are arranged at the same end of the housing 1 in the length direction d1. Furthermore, the first socket 1-20, the signal socket 1-3, and the second socket 1-21 are arranged sequentially at intervals along the height direction d3 on one end of the housing 1.

[0104] Furthermore, the electromagnetic system 3-0, contact system 4, arc extinguishing system 6, and sampling device 7 are arranged side by side with the straight conductor of the secondary circuit structure 9 along the height direction d3; that is, the electromagnetic system 3-0, contact system 4, arc extinguishing system 6, and sampling device 7 are arranged on the same side of the straight conductor in the height direction d3.

[0105] Furthermore, at least a portion of the through conductor is arranged side-by-side with the circuit board 11p of the control system 11 along the width direction d2, and this portion is also plugged into the second sampling terminal 11-1, which is arranged side-by-side with the electromagnetic system 3-0 along the height direction d3.

[0106] Furthermore, the rotation plane of the indicator 13 is parallel to the length direction d1 and perpendicular to the width direction d2 and the height direction d3.

[0107] Furthermore, the first locking member 14 and the third terminal 5-0 are respectively arranged at both ends of the housing 1 along the height direction d3.

[0108] Furthermore, the second locking member 15 and the third terminal 5-0 are respectively arranged at both ends of the housing 1 along the height direction d3.

[0109] Furthermore, when the circuit breaker of the present invention is provided with both the first locking member 14 and the second locking member 15, the first locking member 14 and the second locking member 15 are arranged side by side along the width direction d2.

[0110] Furthermore, the first opening and the second opening are provided on the right side wall of the housing 1, and the installation guide structure 1-1 is provided on the left side wall of the housing 1.

[0111] As shown in Figure 1, the length, width, and height directions of the housing 1 are the same as the length direction d1, width direction d2, and height direction d3 of the circuit breaker. The length a of the housing 1 is 100-150 mm, the width b is 10-60 mm, and the height c is 38-45 mm. The height c of the housing 1 is the module size of the circuit breaker of the present invention. Further, the width b is 10, 15, 20, 25, 30, or 60 mm. Further, for the circuit breaker of the present invention, when the width b of the housing 1 is 10 mm, the rated current is ≤32A; when the width b of the housing 1 is 15, 20, or 25 mm, the rated current is ≤63 or 80A; when the width b of the housing 1 is 30 mm, the rated current is ≤125A; when the width b of the housing 1 is 60 mm, the rated current is ≤250A. In the circuit breaker of the present invention, the width b of the housing 1 can be adjusted according to actual needs. Correspondingly, the number of moving contacts 4-11 and / or stationary contacts 4-2 can be increased along the width direction of the housing 1, and / or the dimensions of the moving contacts 4-11 and / or stationary contacts 4-2 along the width direction of the housing 1 can be increased to enlarge the current-carrying cross-section, thereby improving the current-carrying capacity of the circuit breaker of the present invention. Further, the length a of the housing 1 is the distance between the outer sides of the two side walls of the housing 1 perpendicular to the length direction d1, the width of the housing 1 is the distance between the outer sides of the two side walls of the housing 1 perpendicular to the width direction d2, and the height of the housing 1 is the distance between the outer sides of the two side walls of the housing 1 perpendicular to the height direction d3.

[0112] As shown in Figure 2-10, the circuit breaker of the present invention also includes an operating system, which includes an operating element 2, an operating mechanism 3, a moving contact mechanism 4-1, a sampling device 7, and a control system 11. Furthermore, the operating system also includes an indicator element 13.

[0113] Figures 2-5 show the first embodiment of the operating system.

[0114] The operating system of this embodiment also includes a triggering mechanism 17 connected to the control system 11. The triggering mechanism 17 is triggered by the operating member 2 that has moved 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 work and causes the push rod 3-05 to drive 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 present invention is closed), the operating member 2 moves from the open position to the closed position and triggers the triggering mechanism 17. The triggering mechanism 17 then outputs a first closing signal to the control system 11, and then the control system 11 controls the electromagnetic system 3-0 to work and causes the push rod 3-05 to move from the second position to the first position. The push rod 3-05 drives the moving contact mechanism 4-1 to move from the open position to the closed position. Furthermore, during the process of the operating element 2 moving to the closed position, the push rod 3-05 remains stationary; that is, during the process of the operating element 2 moving from the open position to the closed position, the push rod 3-05 does not move with the operating element 2, but remains in the second position, while the moving contact mechanism 4-1 also remains in the open position. Furthermore, the triggering mechanism 17 is a micro switch.

[0115] 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, which moves towards the open position, thereby driving the moving contact mechanism 4-1 to move towards the disconnect position. That is, the operating member 2 moves from the closed position to the open position, driving the push rod 3-05 from the first position to the second position. At the same time, the push rod 3-05 drives the moving contact mechanism 4-1 from the closed position to the open position, thereby opening the circuit breaker of the present invention. In other words, when the circuit breaker of the present invention is opened, the operating member 2 directly drives the push rod 3-05 to move, and the push rod 3-05 drives the moving contact mechanism 4-1 to move towards the disconnect position.

[0116] In this embodiment of the operating system, when the operating component 2 moves from the open position to the close position to perform a closing operation, the electromagnetic coil of the electromagnetic system 3-0 participates in the operation; when the operating component 2 moves from the close position to the close position to perform a opening operation, the electromagnetic coil of the electromagnetic system 3-0 does not participate in the operation.

[0117] Specifically, as shown in Figures 3-5, the operating component 2 includes an operating component body 2b for external force operation and an operating component connecting part 2c. One end of the push rod 3-05 is engaged with the operating component connecting part 2c and is relatively movable relative to the operating component connecting part 2c along the moving direction of the operating component 2. The operating component body 2b is slidably disposed on the housing 1 and one end protrudes outside the housing 1 for external force operation (that is, one end of the operating component 2 protrudes outside the housing 1 for external force operation). Furthermore, the operating member connecting part 2c includes a connecting part cavity 2-1c; the push 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 cap brim, the front cap brim protrudes radially along the front rod body 3-0500 on one side of the front rod body 3-0500; the front connecting cap 3-0501 is movably arranged in the connecting part cavity 2-1c, the side wall of the connecting part cavity 2-1c (operating member opening wall) is driven to cooperate with the front cap brim, when the operating member 2 moves from the closed position to the open position, the push rod 3-05 is driven to move so as to drive the moving contact mechanism 4-1 to move through the push rod 3-05 to disconnect the contact system 4. Furthermore, the operating component connecting part 2c also includes a connecting part insertion hole 2-0c provided on the connecting part cavity 2-1c; the outer diameter of the front connecting cap 3-0501 is larger than the outer diameter of the front rod 3-0500, the front rod 3-0500 is slidably inserted into the connecting part insertion hole 2-0c and the outer diameter of the front rod 3-0500 is adapted to the inner diameter of the connecting part insertion hole 2-0c, and the outer diameter of the front connecting cap 3-0501 is larger than the inner diameter of the connecting part insertion hole 2-0c and is movably arranged in the connecting part cavity 2-1c. Furthermore, the operating component connecting part 2c includes a first connecting part opening and a second connecting part opening respectively disposed on one side thereon. The first connecting part opening is disposed on the radial side of the connecting part insertion hole 2-0c and communicates with it, while the second connecting part opening communicates with the connecting part cavity 2-1c. The front connecting cap 3-0501 enters the connecting part cavity 2-1c through the second connecting part opening, and the front rod 3-0500 enters the connecting part insertion hole 2-0c through the first connecting part opening. Furthermore, the operating component connecting part 2c has a frame-shaped structure, which includes a first connecting side and a second connecting side. The first connecting side is connected to the operating component body 2b, the connecting part insertion hole 2-0c is disposed on the second connecting side, and the connecting part cavity 2-1c is located in the middle of the frame-shaped structure of the operating component connecting part 2c. Furthermore, the operating component 2 also includes an operating component mating part 2p connected to the operating component body 2b and arranged side by side with the operating component connecting part 2c; the operating component reset spring 18 is a compression spring and arranged side by side with the operating component connecting part 2c, with one end mating with the operating component mating part 2p and the other end fixedly disposed (for example, fixed to the housing 1).

[0118] In another embodiment, the operating component connecting part 2c has an L-shaped structure, including a connecting part vertical arm and a connecting part horizontal arm. One end of the connecting part vertical arm is connected to the operating component body 2b, and the other end is bent and connected to the connecting part horizontal arm. The connecting part vertical arm, the connecting part horizontal arm, and the operating component body 2b form a connecting part cavity 2c. The connecting part horizontal arm is in drive engagement with the front brim of the front connecting cap 3-0501. Further, the connecting part horizontal arm is provided with a connecting part insertion hole 2-0c. Further, the connecting part insertion hole 2-0c is located on the free end of the connecting part horizontal arm. The front connecting cap 3-0501 and the front rod 3-0500 enter the connecting part cavity 2-1c and the connecting part insertion hole 2-0c respectively from the direction opposite to the connecting part vertical arm.

[0119] In another embodiment, the operating member connecting part 2c has an L-shaped structure, which includes a connecting part vertical arm and a connecting part horizontal arm. One end of the connecting part vertical arm is connected to the operating member 2b and the other end is bent and connected to the connecting part horizontal arm. The connecting rod 3-05 is provided with a connecting rod waist-shaped hole, and the connecting part horizontal arm is movably inserted into the connecting part waist-shaped hole. When the operating member 2 moves from the open position to the closed position, the connecting part horizontal arm moves in the connecting rod waist-shaped hole, and the connecting rod 3-05 remains stationary.

[0120] Furthermore, the operating member connecting portion 2c is also used to trigger the triggering mechanism 17. Furthermore, the triggering mechanism 17 and the operating member reset spring 18 are respectively arranged on both sides of the operating member connecting portion 2c along the width direction d2.

[0121] In another embodiment, the operating system also includes another triggering mechanism - a tripping triggering mechanism, which is also connected to the control system 11. During the movement of the operating member 2 from the closed position to the open position, the push rod 3-05 remains stationary. When the operating member 2 moves to the open position, it triggers the tripping triggering mechanism. The tripping triggering 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 work. The electromagnetic system 3-0 drives the push rod 3-05 to move from the first position to the second position. At the same time, the push rod 3-05 drives the moving contact mechanism 4-1 to move from the closed position to the open position and disconnect from the stationary contact 4-2.

[0122] Furthermore, the operating mechanism 3 also includes a front connecting rod 3-1, which is connected to and synchronously moves with the operating member 2. The front connecting rod 3-1 has a structure similar to the operating member connection part 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 top rod 3-0. Furthermore, the front connecting rod 3-1 and the operating member 2 are either detachable separate structures or integrated structures.

[0123] As shown in Figures 1-5, this is a first embodiment of the circuit breaker of the present invention, which includes the operating system of the first embodiment.

[0124] As shown in Figure 5, when the circuit breaker of this embodiment is closed, the main body 2b of the operating member 2 is operated (pressed) by an external force, which drives 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 push rod 3-05 remains stationary (as shown in Figures 5(a)-5(b)). When the operating member 2 moves to the closed position (as shown in Figure 5(b)), the triggering mechanism 17 is triggered. When the triggering 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 work. The electromagnetic system 3-0 drives the push rod 3-05 to move from the second position to the first position (as shown in Figures 5(b)-5(c)). At the same time, the push rod 3-05 drives the moving contact mechanism 4-1 to move from the open position to the closed position and close with the stationary contact 4-2 (as shown in Figures 5(b)-5(c)).

[0125] As shown in Figure 5, Figures 5(c) to 5(a) illustrate the circuit breaker tripping process of this embodiment: When the circuit breaker trips, the main body 2b of the operating member is operated (pulled) by an external force, which drives the operating member 2 to move from the closed position to the open position. At the same time, the operating member 2 drives the push rod 3-05 to move from the first position to the second position (the connecting part 2c of the operating member presses against the front connecting cap 3-0501 of the push rod 3-05 through the second side of the connecting part, causing the push rod 3-05 to move from the first position to the second position). The push rod 3-05 also drives the moving contact mechanism 4-1 to move from the closed position to the open position and disconnect from the stationary contact 4-2.

[0126] The circuit breaker in this embodiment includes a first locking mechanism, which includes a first locking element 14 and a first locking element return spring 16. Further, the circuit breaker in this embodiment also includes an unlocking mechanism 19, which is an unlocking rod. One end of the unlocking rod is in transmission cooperation with the operating element 2 (direct or indirect transmission cooperation), and the other end is in transmission cooperation with the first locking element 14. Specifically, one end (the front end of the unlocking rod) abuts against the operating element 2 (i.e., the front end of the unlocking rod is directly in transmission cooperation with the operating element 2), the middle part movably abuts against the abutment protrusion of the housing 1 and is rotatably set with the abutment protrusion as a fulcrum, and the other end (the rear end of the unlocking rod) is hinged to the first locking element 14. When the operating element 2 is pulled in the open position, it presses against the front end of the unlocking rod, driving the unlocking rod to rotate with the abutment protrusion as a fulcrum, and the rear end of the unlocking rod drives the first locking element 14 to move into the housing 1.

[0127] In another embodiment, one end (the front end of the unlocking rod) abuts against the indicator 13 (that is, the front end of the unlocking rod is indirectly connected to the operating member 2 through the indicator 13), the middle part moves against the abutment protrusion of the housing 1 and is rotatably set with the abutment protrusion as the 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 in the open position, the indicator 13 presses against the front end of the unlocking rod and drives the unlocking rod to rotate with the abutment protrusion as the fulcrum, and the rear end of the unlocking rod drives the first locking member 14 to move into the housing 1.

[0128] In another embodiment, 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 part of the unlocking rod abuts against the abutting protrusion; when the operating member 2 is pulled in the open position, the operating member 2 drives the unlocking rod to move through the front end of the unlocking rod, and at the same time causes the unlocking rod to rotate around the abutting protrusion as a fulcrum, while the rear end of the unlocking rod drives the first locking member 14 to move into the housing 1.

[0129] The circuit breaker in this embodiment may further include a second locking mechanism, which includes a second locking member 15. When the circuit breaker in this embodiment is closed, the second locking member 15 is directly driven by the operating member 2 to rotate forward, causing the second locking protrusion 15-0 of the second locking member 15 to protrude outside the housing 1. When the circuit breaker in this embodiment is open, the second locking member 15 is directly driven by the operating member 2 to rotate in the reverse direction, causing the second locking protrusion 15-0 to move into the housing 1. In the closed state of the circuit breaker in this embodiment, the operating member 2 directly engages with the second locking member 15 to limit the reverse rotation of the second locking member 15. Furthermore, when the circuit breaker in this embodiment is closed, the second locking member front arm 15-3 of the second locking member 15 is directly driven by the operating member 2 to rotate the second locking member 15 in the forward direction. Furthermore, in the circuit breaker of this embodiment, when the circuit breaker is in the open state, the second locking member 15 is directly driven by the operating member 2 which is pulled out at the open position and rotates in the reverse direction, and the first locking member 14 is driven by the reverse-rotating second locking member 15 and moves into the housing 1; that is, in the circuit breaker of this embodiment, when the operating member 2 is pulled out at the open position, the operating member 2 simultaneously drives the second locking member 15 to rotate in the reverse direction, and the second locking member 15 simultaneously drives the first locking member 14 to move into the housing 1.

[0130] Furthermore, when the operating member 2 is in the open position, there is free travel between the operating member 2 and the front connecting cap 3-0501 of the push rod 3-05, allowing the operating member 2 to move relative to the push rod 3-05 to the outside of the housing 1. Thus, when the operating member 2 is in the open position, it can be driven by the unlocking mechanism 9 or the second locking member 15 to move the first locking member 14 into the housing 1. Specifically, when the operating member 2 is in the open position, there is free travel between the operating member opening wall of the operating member 2 and the front connecting cap 3-0501.

[0131] Figure 6-10 shows a second embodiment of the operating system.

[0132] In the operating system of this embodiment, the two ends of the push rod 3-05 of the electromagnetic system 3-0 are respectively connected to the operating member 2 and the moving contact mechanism 4-1. The operating member 2 switches between the closed and open positions, thereby driving the moving contact mechanism 4-1 to switch between the closed and open positions via the push rod 3-05. That is, when the operating member 2 moves from the open position to the closed position, the push rod 3-05 is driven by the operating member 2 and moves simultaneously from the second position to the first position, and the moving contact mechanism 4-1 is driven by the push rod 3-05 and moves simultaneously from the open position to the closed position to close with the stationary contact 4-2; when the operating member 2 moves from the closed position to the open position, the push rod 3-05 is driven by the operating member 2 and moves simultaneously from the first position to the second position, and the moving contact mechanism 4-1 is driven by the push rod 3-05 and moves simultaneously from the closed position to the open position to disconnect with the stationary contact 4-2.

[0133] Furthermore, the operating mechanism 3 also includes a front connecting rod 3-1, which is connected to and synchronously moves with the operating member 2. Further, the front connecting rod 3-1 includes a front connecting rod drive part 3-11 and a front connecting rod connecting part 3-12. The front connecting rod connecting part 3-12 is used to connect with the operating member 2, and the front connecting rod drive part 3-11 is used to drive the push rod 3-05. Further, when the operating member 2 is in the open position, there is free travel between the front connecting rod 3-1 and the push rod 3-05, allowing the front connecting rod 3-1 to move relative to the push rod 3-05 towards the outside of the housing 1 under the drive of the operating member 2.

[0134] Specifically, the front connecting rod drive unit 3-11 includes a front connecting rod insertion hole 3-111 and a front connecting rod cavity 3-110; the top rod 3-05 includes a front rod body 3-0500 and a front connecting cap 3-0501, the outer diameter of the front connecting cap 3-0501 is larger than the outer diameter of the front rod body 3-0500, the front rod body 3-0500 is slidably inserted into the front connecting rod insertion hole 3-111 and the outer diameter of the front rod body 3-0500 is adapted to the inner diameter of the front connecting rod insertion hole 3-111, the front connecting cap 3-0501 is arranged in the front connecting rod cavity 3-110 and the outer diameter of the front connecting cap 3-0501 is larger than the inner diameter of the front connecting rod insertion hole 3-111; the front connecting rod drive unit 3-11 includes a front connecting rod closing wall and a front connecting rod opening wall that are opposite to each other and located on both sides of the front connecting rod cavity 3-110. The front connecting rod insertion hole 3-111 is located on the front connecting rod opening wall; when the operating member 2 moves from the opening position to the closing position, the front connecting rod closing wall presses against the front connecting cap 3-0501 and drives the front connecting rod 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 connecting rod opening wall presses against the front connecting cap 3-0501 and drives the front connecting rod 3-05 to move from the first position to the second position; when the operating member 2 is in the opening position, a free travel is formed between the front connecting rod opening wall and the front connecting cap 3-0501, allowing the operating member 2 to be pulled relative to the top rod 3-05 and move to the outside of the housing 1, so that the operating member 2 drives the first locking member 14 to move into the housing 1 through the unlocking mechanism 19 or the second locking member 15. Furthermore, the front connecting rod drive unit 3-11 also includes a first drive unit opening and a second drive unit opening respectively disposed on one side thereon. The first drive unit opening communicates with the front connecting rod cavity 3-110, and the second drive unit opening communicates with the front connecting rod insertion hole 3-111 and is located on the radial side of the front connecting rod insertion hole 3-111. The front connecting rod cap 3-0501 enters the front connecting rod cavity 3-110 through the first drive unit opening, and the front rod body 3-0500 enters the front connecting rod insertion hole 3-111 through the second drive unit opening.

[0135] Specifically, the front connecting rod connection portion 3-12 includes a pair of front connecting rod connecting walls, which are respectively arranged on both sides of the operating member 2 and connected to it. Further, the two front connecting rod connecting walls are connected to the operating member 2 via a front connecting shaft 3-31 and are respectively located on both sides of the mounting cavity 2-2 of the operating member 2; the front connecting shaft 3-31 passes through the indicator mounting portion 13-2 of the indicator 13 and rotatably engages with it, that is, the indicator 13 is rotatably mounted on the operating member 2 via the front connecting shaft 3-31; both side walls of the mounting cavity 2-2 are provided with operating member shaft holes 2-4 for inserting the front connecting shaft 3-31; the front connecting rod connecting wall is provided with a front connecting rod connecting hole 3-1200 for inserting the front connecting shaft 3-31.

[0136] As shown in Figures 1 and 6-12, this is a second embodiment of the circuit breaker of the present invention, which includes the operating system of the second embodiment.

[0137] When the circuit breaker in this embodiment is closed, the main body 2b of the operating member 2 is operated (pressed) by an external force, which drives the operating member 2 to move from the open position to the closed position. At the same time, the operating member 2 drives the top rod 3-05 to move from the second position to the first position through the front connecting rod 3-1. The top rod 3-05 drives the moving contact mechanism 4-1 to move from the open position to the closed position and close with the stationary contact 4-2.

[0138] Furthermore, the operating component 2 and the front connecting rod 3-1 are either detachable separate structures or integrated structures.

[0139] When the circuit breaker in this embodiment is tripped, the main body 2b of the operating member is operated (pulled) by an external force, which drives the operating member 2 to move from the closed position to the open position. At the same time, the operating member 2 drives the top rod 3-05 to move from the first position to the second position through the front connecting rod 3-1. The top rod 3-05 drives the moving contact mechanism 4-1 to move from the closed position to the open position and disconnect from the stationary contact 4-2.

[0140] In this embodiment, when the circuit breaker's operating component 2 performs closing and opening operations, the electromagnetic coil of the electromagnetic system 3-0 is not involved.

[0141] The circuit breaker in 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 in this embodiment is closed, the second locking member 15 is driven by the front connecting rod 3-1 (the front connecting rod 3-1 and the operating member 2 are synchronously moved, and the second locking member 15 is driven by the front connecting rod 3-1, which is also indirectly driven by the operating member 2) and rotates forward, causing the second locking protrusion 15-0 of the second locking member 15 to protrude outside the housing 1. When the circuit breaker in this embodiment is open, the second locking member 15 is driven by the front connecting rod 3-1 and rotates in the reverse direction, causing the second locking protrusion 15-0 to move into the housing 1. In the closed state, the front connecting rod 3-1 and the second locking member 15 are in a limiting engagement to restrict the reverse rotation of the second locking member 15. Furthermore, when the circuit breaker in this embodiment is closed, the second locking member 15's front arm 15-3 is driven by the front connecting rod 3-1 to rotate the second locking member 15 in the forward direction. Furthermore, when the circuit breaker in this embodiment is in the open state, the second locking member 15 is driven to rotate in the reverse direction by the operating member 2, which is pulled out at the open position, and the first locking member 14 is driven to move into the housing 1 by the reverse-rotating second locking member 15; that is, when the circuit breaker in this embodiment is in the open state, and the operating member 2 is pulled out at the open position, the operating member 2 simultaneously drives the second locking member 15 to rotate in the reverse direction, and the second locking member 15 simultaneously drives the first locking member 14 to move into the housing 1; the operating member 2 can simultaneously unlock the first locking member 14 and the second locking member 15, which is beneficial for improving operating efficiency and simplifying the circuit breaker structure.

[0142] 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 mounted 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 member protrusion 15-0. When the circuit breaker in this embodiment is closed, the second locking member front arm 15-3 is driven by the front connecting rod 3-1 to make the second locking member 15 rotate in the forward direction. Further, the second locking member 15 also includes a second locking member mating portion 15-4 disposed on the second locking member front arm 15-3. The second locking member mating portion 15-4 and the second locking member protrusion 15-0 are respectively disposed on both sides of the second locking member front arm 15-3. When the circuit breaker in this embodiment is closed, the second locking member mating portion 15-4 is pressed by the front connecting rod 3-1 to make the second locking member 15 rotate in the forward direction. Furthermore, the second locking member mating part 15-4 includes a mating part transition surface 15-41 and a mating part limiting surface 15-40 that are bent and connected; the front connecting rod 3-1 includes a front connecting rod first transition surface 3-121, a front connecting rod limiting surface 3-122, and a front connecting rod second transition surface 3-123 that are connected in sequence. The front connecting rod first transition surface 3-121 and the front connecting rod second transition surface 3-123 are bent and connected to the front connecting rod limiting surface 3-122 and bent on the same side of the front connecting rod limiting surface 3-122 (the side away from the second locking member 15); the mating part limiting surface 15-40 abuts against the front connecting rod limiting surface 3-122 to prevent the second locking member 15 from rotating in the opposite direction. The mating part limiting surface 15-40 and the front connecting rod... The rod limiting surface 3-122 is parallel to the moving direction of the front connecting rod 3-1. In this embodiment, when the circuit breaker is in the open state and the operating member 2 is pulled, the second transition surface 3-123 and the limiting surface 3-122 of the front connecting rod successively contact the free end of the front arm 15-3 of the second locking member, thereby driving the second locking member 15-3 to rotate in the reverse direction. The limiting surface 3-122 of the front connecting rod and the free end of the front arm 15-3 of the second locking member limit each other, thereby preventing the second locking member 15 from rotating in the forward direction. In this embodiment, when the circuit breaker is closed, the first transition surface 3-121 and the limiting surface 3-122 of the front connecting rod respectively contact the transition surface 15-41 and the limiting surface 15-40 of the mating part, thereby driving the second locking member 15 to rotate in the forward direction. Furthermore, the second locking member 15 also includes a second locking member rear arm 15-1, one end of which is connected to the second locking member mounting part 15-2 and the other end is in transmission engagement with the front connecting rod 3-1. Furthermore, the second locking member front arm 15-3 and the second locking member rear arm 15-1 are arranged in a V-shape, with an obtuse angle between them and the opening of the obtuse angle facing the operating member 2.Furthermore, the first locking member 14 includes a first locking member driven portion 14-2; the first locking member driven portion 14-2 is pressed by the second locking member rear arm 15-1 of the second locking member 15 rotating in the opposite direction, driving the first locking member 14 to move into the housing 1; that is, when the circuit breaker in this embodiment is in the open state and the operating member 2 is in the open position, the operating member 2 is pulled by an external force and moves out of the housing 1, while the operating member 2 simultaneously drives the second locking member 15 to rotate in the opposite direction, and the second locking member 15 simultaneously presses against the first locking member driven portion 14-2 through the second locking member rear arm 15-1, driving the first locking member 14 to move into the housing 1. Furthermore, one end of the first locking member 14 is a first locking member protrusion 14-1 and the other end is provided with a first locking member driven portion 14-2, the first locking member driven portion 14-2 is a rib, the protrusion direction of the rib is perpendicular to the sliding direction of the first locking member 14 and the same as the rotation axis of the second locking member 15.

[0143] The following is a third embodiment of the circuit breaker of the present invention.

[0144] The circuit breaker in this embodiment has two triggering mechanisms: a closing triggering mechanism and a opening triggering mechanism. During the movement of the operating member 2 to the opening position, or while it is in the opening position, the opening triggering mechanism is triggered, energizing one electromagnetic coil of the electromagnetic system 3-0. The electromagnetic system 3-0 drives the push rod 3-05 from the first position to the second position, and the push rod 3-05 simultaneously drives the moving contact mechanism 4-1 from the closed position to the open position. During the movement of the operating member 2 to the closing position, or while it is in the closing position, the closing triggering mechanism is triggered, energizing the other electromagnetic coil of the electromagnetic system 3-0. The electromagnetic system 3-0 drives the push rod 3-05 from the second position to the first position, and the push rod 3-05 simultaneously drives the moving contact mechanism 4-1 from the open position to the closed position. In this embodiment, the push rod 3-05 is not affected by the movement of the operating member 2; its action is only driven by the electromagnetic coil of the electromagnetic system 3-0. Furthermore, the circuit breaker in this embodiment also 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 from the closed position to the open position through the electromagnetic system 3-0 when a short circuit or overload fault occurs in the circuit where the circuit breaker is located, and are not used for the normal opening and closing control of the circuit breaker.

[0145] The following is a fourth embodiment of the circuit breaker of the present invention.

[0146] The circuit breaker in 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 in this embodiment is closed, when the operating member 2 moves from the open position to the closed position, the trigger mechanism 17 is triggered by the operating member 2 and conducts. The electromagnetic system 3-0 is energized and drives the push rod 3-05 to move from the second position to the first position, thereby closing the circuit breaker. At the same time, the push rod 3-05 directly or indirectly triggers the normally closed switch to open, thereby disconnecting the power supply of the electromagnetic system 3-0 and the electromagnetic system 3-0. When the circuit breaker in this embodiment is opened, the operating member 2 moves from the closed position to the open position, and at the same time drives the push rod 3-05 to move from the first position to the second position, thereby opening the circuit breaker. Furthermore, the electromagnetic system 3-0 is also used to realize the short circuit and / or overload protection function of the circuit breaker in this embodiment. The circuit breaker in this embodiment also includes a control system 11, which is electrically connected to the electromagnetic system 3-0. The circuit structure that realizes 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 the short circuit and / or overload current through the sampling device 7, it drives the electromagnetic system 3-0 to move the push rod 3-05 from the first position to the second position, and the operating member 2 is simultaneously reset from the closed position to the open position.

[0147] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0148] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker comprising a housing (1) and a main circuit structure, the main circuit structure comprising an operating member (2) slidingly arranged on the housing (1), an electromagnetic system (3-0), a contact system (4), an arc extinguishing system (6) cooperating with the contact system (4), and a control system (11) connected to the electromagnetic system (3-0) for controlling the electromagnetic system (3-0), the electromagnetic system (3-0) comprising a magnetic generating assembly (3-0m) and a top rod (3-05) movably arranged in the middle of the magnetic generating assembly (3-0m), the contact system (4) comprising a movable contact mechanism (4-1) and a stationary contact (4-2), the top rod (3-05) being in transmission cooperation with the operating member (2) and the movable contact mechanism (4-1) at both ends thereof, the operating member (2) reciprocatingly sliding to drive the contact system (4) to close and open through the electromagnetic system (3-0), the control system (11) controlling the electromagnetic system (3-0) to drive the contact system (4) to close and open. characterized in that The main circuit structure further comprises a sampling device (7) coupled to the contact system (4) and connected to the control system (11), when an overload and / or short-circuit current flows through the contact system (4), the electromagnetic system (3-0) is controlled by the control system (11) to drive the contact system (4) to open.

2. The circuit breaker of claim 1, wherein: The movable contact mechanism (4-1) is rotationally arranged; the circuit breaker further comprises a length direction d1, a width direction d2 and a height direction d3; in the length direction d1, the operating member (2) is arranged at one end of the housing (1) and the sampling device (7) and the arc extinguishing system (6) are arranged at the other end of the housing (1); the electromagnetic system (3-0) and the contact system (4) are sequentially arranged between the operating member (2) and the arc extinguishing system (6) along the length direction d1; the sampling device (7) and the arc extinguishing system (6) are arranged side by side along the height direction d3, and the control system (11) comprises a circuit board (11p), at least part of the circuit board (11p) being arranged side by side with the electromagnetic system (3-0) along the height direction d3.

3. The circuit breaker of claim 2, wherein: The circuit board (11p) is arranged side by side with the contact system (4) and / or the arc extinguishing system (6) along the width direction d2.

4. The circuit breaker of claim 2, wherein: The operating member (2), the electromagnetic system (3-0) and the sampling device (7) are arranged on the same side of the arc extinguishing system (6) along the height direction d3. The main circuit structure further comprises a first terminal (8-0) and a third terminal (5-0) arranged at both ends of the housing (1) along the length direction d1, the contact system (4) being connected in series between the first terminal (8-0) and the third terminal (5-0), the third terminal (5-0) being arranged side by side with the operating member (2) along the height direction d3, the electromagnetic system (3-0), the arc extinguishing system (6), the sampling device (7) and the control system (11) being located between the operating member (2) and the first terminal (8-0) along the length direction d1, the operating member (2), the electromagnetic system (3-0), the sampling device (7) and the first terminal (8-0) being located on the same side of the third terminal (5-0) and the arc extinguishing system (6) along the height direction d3.

5. The circuit breaker of claim 4, wherein: The main circuit structure further comprises a connecting conductor (20), the static contact (4-2) is electrically connected with the third terminal (5-0) through the connecting conductor (20), the connecting conductor (20) is a conductive plate, and the connecting conductor (20) and the circuit board (11p) of the control system (11) are arranged side by side in the width direction d2; The control system (11) further comprises a first sampling terminal (11-0) arranged on the circuit board (11p), the first sampling terminal (11-0) and the connecting conductive plate (20) are located on one side of the circuit board (11p) in the width direction d2, the connecting conductive plate (20) is in plug-in cooperation with the first sampling terminal (11-0), and the connecting conductive plate (20), the first sampling terminal (11-0) and the electromagnetic system (3-0) are arranged side by side in the height direction d3.

6. The circuit breaker of claim 4, wherein: The circuit breaker further comprises a secondary circuit structure (9), the secondary circuit structure (9) is a through circuit and comprises a second terminal (8-1), a through conductor and a fourth terminal (5-1) connected in sequence, the second terminal (8-1) is arranged side by side with the first terminal (8-0) in the height direction d3, and the fourth terminal (5-1) is arranged side by side with the third terminal (5-0) in the width direction d2; the electromagnetic system (3-0), the contact system (4), the arc extinguishing system (6) and the sampling device (7) are arranged side by side with the through conductor in the height direction d3; The control system (11) further comprises a second sampling terminal (11-1) arranged on the circuit board (11p), the through conductor is a through conductive plate, at least part of the through conductive plate is arranged side by side with the circuit board (11p) of the control system (11) in the width direction d2, the part is located on one side of the circuit board (11p) in the width direction d2 and is in plug-in cooperation with the second sampling terminal (11-1), and the through conductive plate, the second sampling terminal (11-1) and the electromagnetic system (3-0) are arranged side by side in the height direction d3; The main circuit structure further comprises a signal terminal (12) connected with the control system (11), the first terminal (8-0), the signal terminal (12) and the second terminal (8-1) are arranged side by side in the height direction d3.

7. The circuit breaker of claim 2, wherein: In the length direction d1, the first terminal (8-0) of the main circuit structure and the third terminal (5-0) of the main circuit structure are arranged at one end of the circuit breaker, and the operating member (2) is arranged at the other end of the circuit breaker.

8. The circuit breaker of claim 1, wherein: The operating member (2) has a closing position and an opening position; the main circuit structure further comprises a triggering mechanism (17) connected with the control system (11), the triggering mechanism (17) is triggered by the operating member (2) moving to the closing position to send a first closing signal to the control system (11), and the control system (11) receives the first closing signal to control the electromagnetic system (3-0) to drive the contact system (4) to close; the operating member (2) is moved from the closing position to the opening position to drive the movable contact mechanism (4-1) to move through the jacking rod (3-05), so that the contact system (4) is opened.

9. The circuit breaker of claim 8, wherein: The top rod (3-05) remains stationary during the movement of the operating member (2) from the open position to the closed position; the operating member (2) comprises an operating member body (2b) and an operating member connecting portion (2c), one end of the operating member body (2b) protrudes outside the shell (1) for external force operation, and the other end is connected with the operating member connecting portion (2c); one end of the top rod (3-05) is matched with the operating member connecting portion (2c) and is arranged to move relatively along the length direction d1.

10. The circuit breaker of claim 1, wherein: The operating member (2) has a closed position and an open position, and when it switches between the closed position and the open position, it directly drives the top rod (3-05) to move to drive the movable contact mechanism (4-1) to close and open with the static contact (4-2).

11. The circuit breaker of claim 10, wherein: The circuit breaker further comprises a front connecting rod (3-1) connected with the operating member (2) and arranged to move synchronously, one end of the top rod (3-05) is connected with the front connecting rod (3-1) and arranged to move relatively along the length direction d1.

12. The circuit breaker of claim 1, wherein: The circuit breaker further comprises a rear connecting rod (3-2), one end of the top rod (3-05) is connected with the operating member (2) and the other end is connected with the rear connecting rod (3-2) and arranged to move synchronously, the rear connecting rod (3-2) is further hinged with the contact support (4-10) of the movable contact mechanism (4-1); The main circuit structure further comprises an operating member reset spring (18) acting on the operating member (2) to make it have a tendency to move to the open position; The electromagnetic system (3-0) is a magnetic holding system; the magnetism generating assembly (3-0m) comprises a coil assembly (3-01), a magnetic yoke (3-03) wrapped around the coil assembly (3-01), and a permanent magnet (3-04) sleeved outside the middle part of the coil assembly (3-01) and located between the two electromagnetic coils of the coil assembly (3-01); the electromagnetic system (3-0) further comprises a movable iron core (3-02) slidingly arranged in the middle part of the coil assembly (3-01), the movable iron core (3-02) is connected with the top rod (3-05) and arranged to move synchronously, and the two ends of the top rod (3-05) protrude on both sides of the axial direction of the coil assembly (3-01); the electromagnetic system (3-0) further comprises a first static iron core and a second static iron core arranged oppositely along the axial direction of the coil assembly (3-01), when one end of the movable iron core (3-02) is attracted to the first static iron core, the top rod (3-05) is in the first position, and when the movable iron core (3-02) is attracted to the second static iron core, the top rod (3-05) is in the second position; The top rod (3-05) comprises a front top rod (3-050) and a rear top rod (3-051), one end of the front top rod (3-050) is inserted into the movable iron core (3-02) and the other end is connected with the operating member (2) in transmission, one end of the rear top rod (3-051) is inserted into the movable iron core (3-02) and the other end is connected with the movable contact mechanism (4-1) in transmission.

13. The circuit breaker of claim 1, wherein: The shell (1) further comprises a signal window (1-4) and an operating member mounting hole (1-6) for inserting the operating member, which are arranged on the same side wall of the shell (1) respectively, and the signal window (1-4) and the operating member mounting hole (1-4) are arranged side by side along the height direction d3; the circuit breaker further comprises an indicating element connected with the control system (11), which cooperates with the signal window (1-4) to indicate the state of the circuit breaker; The circuit breaker further comprises a first locking member (14) and a first locking member reset spring (16), which are arranged in the shell (1) and slide along the height direction d3; the first locking member reset spring (16) acts on the first locking member (14) to make it have a tendency to move to the outside of the shell (1) and make the first locking protrusion (14-1) of the first locking member (14) protrude outside the shell (1); when the first locking protrusion (14-1) is pressed by external force, the first locking member (14) moves to the inside of the shell (1); in the open state, the first locking member (14) is driven by the operating member (2) being pulled to move to the inside of the shell (1); the circuit breaker further comprises an unlocking mechanism (19), which is an unlocking rod, one end of which is directly or indirectly in transmission cooperation with the operating member (2) and the other end is in transmission cooperation with the first locking member (14).

14. The circuit breaker of claim 1, wherein: The circuit breaker further comprises a second locking member (15) arranged on the shell (1) and rotating, and the second locking member (15) comprises a second locking protrusion (15-0); when the circuit breaker is closed, the second locking member (15) is driven by the operating member (2) to rotate forward so that the second locking protrusion (15-0) protrudes outside the shell (1); when the circuit breaker is opened, the second locking member (15) rotates reversely so that the second locking protrusion (15-0) moves to the inside of the shell (1); When the circuit breaker is opened, the second locking member (15) is driven by the operating member (2) moving to the open position to rotate reversely; The circuit breaker further comprises a first locking member (14) and a first locking member reset spring (16), which are arranged on the shell (1) and slide along the height direction d3; the first locking member reset spring (16) acts on the first locking member (14) to make it have a tendency to move to the outside of the shell (1), and the first locking protrusion (14-1) of the first locking member (14) protrudes outside the shell (1); in the open state, the first locking member (14) is driven by the operating member (2) being pulled to move to the inside of the shell (1); the second locking member (15) is in transmission cooperation with the first locking member (14); when the circuit breaker is opened, the first locking member (14) is driven by the reversely rotating second locking member (15) to move to the inside of the shell (1).

15. The circuit breaker of claim 1, wherein: The length a of the shell (1) is 100-150 mm, the width b is 10-60 mm, and the height c is 38-45 mm.

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