A circuit breaker

Abstract

The application provides a circuit breaker, and relates to the technical field of low-voltage electrical appliances, which comprises a shell, an electric operating mechanism, a PCB board, an operating mechanism and a rotating rod arranged in the shell, the electric operating mechanism and the PCB board are signal-linked, the electric operating mechanism further comprises a terminal gear engaged with a handle, when the PCB board receives an instruction that closing is not allowed, the electric operating mechanism is driven to rotate, the terminal gear pushes the rotating rod to rotate and stop at a locking position, when manual closing is performed, the lock catch of the operating mechanism abuts against the rotating rod to limit the rotation of the lock catch. The PCB board controls the electric operating mechanism, when the PCB board receives an instruction that closing is not allowed under abnormal conditions, the electric operating mechanism is driven to rotate, the terminal gear rotates and pushes the rotating rod to rotate and stop at the locking position, when manual closing is performed, the lock catch of the operating mechanism abuts against the rotating rod to limit the rotation of the lock catch and hinder manual closing, the operation that manual closing is not allowed under abnormal conditions is realized, and the operation safety of the circuit breaker is ensured; the terminal gear, the rotating rod and the lock catch are all arranged in the shell, and the structure of the circuit breaker is simplified.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, specifically to a circuit breaker. Background Technology

[0002] The opening and closing functions of a circuit breaker are its fundamental functions. Generally, when a circuit breaker experiences an abnormal situation such as a short circuit or open circuit, manual closing is not permitted to ensure its safe operation. Currently, some circuit breakers incorporate mechanisms to prevent manual closing under abnormal conditions. However, these mechanisms are typically complex, resulting in a bulky and space-consuming circuit breaker that hinders miniaturization and limits its application in miniaturized scenarios. Utility Model Content

[0003] The purpose of this application is to provide a circuit breaker that can prevent the circuit breaker from closing under abnormal conditions, ensuring the safe use of the circuit breaker, and has a simple structure that can adapt to small-size scenarios.

[0004] In one aspect of this application, a circuit breaker is provided, including a housing. An electric operating mechanism, a PCB board, an operating mechanism, and a rotating rod are disposed within the housing. The electric operating mechanism and the PCB board are signal-linked. The electric operating mechanism also includes an end tooth that engages with a handle. When the PCB board receives a command prohibiting closing the circuit, the electric operating mechanism is driven to rotate, causing the end tooth to push the rotating rod to rotate and stop in a locked position. When manually closing the circuit, the latch of the operating mechanism abuts against the rotating rod to restrict the rotation of the latch.

[0005] Optionally, a limiting boss and a trigger rod are provided on the end face of the end tooth, and a micro switch is also provided on the PCB board. The trigger rod is used to trigger the micro switch on the PCB board under the command that closing is not allowed, so that the end tooth stops in the locked position. The limiting boss of the end tooth pushes the rotating rod to stop in the locked position. When manually closing the circuit, the latch of the operating mechanism abuts against the rotating rod to restrict the rotation of the latch.

[0006] Optionally, the rotating rod is provided with a connecting hole, and the rotating rod is rotatably disposed in the housing through the connecting hole. The handle is provided with a sector tooth, and the end tooth is provided with a first meshing tooth that meshes with the sector tooth. A limiting groove is provided on one side of the end tooth located at the first meshing tooth. The rotating rod moves within the space reserved between the limiting groove and the sector tooth, and the rotating rod and the handle remain in contact.

[0007] Optionally, a first elongated portion and a limiting portion are respectively provided on both sides of the connecting hole. The first elongated portion has a first working surface that acts on the handle, and the limiting portion is used to abut against the latch.

[0008] When the PCB board receives a closing command, the trigger rod of the end tooth triggers a micro switch on the PCB board, causing the end tooth to stop in the closing position. When a closing command is received, the end tooth rotates, pushing the rotating rod through the limiting boss. The first working surface of the rotating rod pushes the handle to rotate to the closing position in the closing direction. At the same time, the trigger rod of the end tooth triggers a micro switch on the PCB board, causing the end tooth to stop in the closing position.

[0009] Optionally, one end of the connecting hole is provided with a second extension, the second extension having a third working surface that interacts with the latch;

[0010] When the end tooth rotates normally for both closing and opening, the trigger rod activates the micro switch on the PCB board, causing the end tooth to stop in the closed position. When a closing command is received, the end tooth rotates, causing the limiting boss to push against the rotating rod. The third working surface of the rotating rod pushes the latch to rotate, causing the operating mechanism to disassemble and open. The handle rotates to the open position, and simultaneously, the trigger rod of the end tooth activates the micro switch on the PCB board, causing the end tooth to stop in the open position.

[0011] Optionally, the operating mechanism further includes a mechanism seat, on which a sliding groove is provided, and a connecting rod is provided between the handle and the latch. In the closed state, one end of the connecting rod is located in the sliding groove of the mechanism seat.

[0012] When a tripping command is received, one end of the connecting rod slides out of the groove, disassembling the operating mechanism to trip the circuit breaker.

[0013] Optionally, a handle spring is fitted on the handle, and a tripping spring is provided inside the housing. The handle rotates to the tripping position under the action of the handle spring and the tripping spring.

[0014] Optionally, a return spring is provided in the connecting hole of the rotating rod, and the groove wall of the limiting groove of the end tooth forms a limiting surface. The two ends of the return spring are respectively connected to the rotating rod and the housing. When the end tooth stops at the closed position, the rotating rod contacts the limiting surface of the end tooth under the action of the return spring.

[0015] Optionally, the limiting boss and the actuating rod are disposed on the same side end face of the end tooth.

[0016] Optionally, the actuating rod is a magnet, and the micro switch on the PCB board is a Hall switch.

[0017] The circuit breaker provided in this application embodiment can control the rotation of the electric operating mechanism via a PCB board. When the PCB board receives an instruction that closing is not allowed under abnormal conditions, the electric operating mechanism is driven to rotate, causing the end gear to rotate and push the rotating rod to rotate and stop in the locked position. When manually closing, the latch of the operating mechanism abuts against the rotating rod, restricting the rotation of the latch and preventing manual closing. The operating mechanism cannot perform manual closing operation, realizing the operation that does not allow manual closing under abnormal conditions, thereby ensuring the operational safety of the circuit breaker. The end gear, rotating rod and latch of this application are all set in the housing, which can simplify the overall structure of the circuit breaker and make it able to meet the requirements of miniaturization scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the circuit breaker's state limiting manual closing (locked position) under abnormal conditions, provided in the embodiments of this application.

[0020] Figure 2 This is a schematic diagram of the state of the micro switch triggered by the end toothed actuating rod when the circuit breaker is in the locked position, as provided in the embodiments of this application.

[0021] Figure 3 This is one of the structural schematic diagrams of the rotating rod of the circuit breaker provided in the embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the circuit breaker's open position (electric and manual) status provided in the embodiments of this application;

[0023] Figure 5 This is a schematic diagram showing the state of the micro switch triggered by the end tooth contact rod when the circuit breaker is in the open state, as provided in the embodiments of this application.

[0024] Figure 6 This is a schematic diagram of the circuit breaker closed position (electric) state provided in the embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the circuit breaker closed position (manual) state provided in the embodiments of this application;

[0026] Figure 8 This is a schematic diagram showing the state of the micro switch triggered by the end tooth contact rod when the circuit breaker is in the closed state, as provided in the embodiments of this application.

[0027] Figure 9 This is a schematic diagram of the circuit breaker end tooth structure provided in the embodiments of this application;

[0028] Figure 10a This is a second schematic diagram of the rotating rod of the circuit breaker provided in the embodiments of this application;

[0029] Figure 10b This is the third schematic diagram of the rotating rod of the circuit breaker provided in the embodiments of this application;

[0030] Figure 11 This is provided by the embodiments of this application. Figure 10a A schematic diagram showing the status of the circuit breaker restricting manual closing (locked position) under abnormal conditions;

[0031] Figure 12 This is provided by the embodiments of this application. Figure 10a Schematic diagram of the corresponding circuit breaker open position (electric and manual);

[0032] Figure 13 This is provided by the embodiments of this application. Figure 10a A schematic diagram of the corresponding circuit breaker closed position (electric) status;

[0033] Figure 14 This is provided by the embodiments of this application. Figure 10a The corresponding circuit breaker closed position (manual) status diagram.

[0034] Icons: 10-Housing; 11-Handle; 12-Electrical operating mechanism; 120-End tooth; 120a-Limiting boss; 120b-Actuating rod; 120c-First meshing tooth; 120d-Second meshing tooth; 120e-Limiting groove; 120f-Limiting surface; 13-PCB board; 140-Mechanism seat; 140a-Slide groove; 141-Lock; 141a-Extended end; 142-Connecting rod; 15-Signal terminal; 16-Electromagnetic trip unit; 17-Shunting device; 18-Micro switch; 19-Arc extinguishing channel; 20-Rotating rod; 200-Connecting hole; 201-First extended part; 201a-First working surface; 201b-Second working surface; 202-Limiting part; 203-Second extended part; 203a-Third working surface; 203b-Fourth working surface; 20a-Reset spring. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0036] In the description of this application, it should be noted that the terms "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 commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] Please refer to Figure 1 , Figure 2 As shown, this application embodiment provides a circuit breaker, including: a housing 10, an electric operating mechanism 12, a PCB board 13, an operating mechanism and a rotating rod 20 disposed inside the housing 10, the electric operating mechanism 12 and the PCB board 13 are linked by signals, the electric operating mechanism 12 also includes an end tooth 120 that meshes with a handle 11, when the PCB board 13 receives a command that closing is not allowed, the electric operating mechanism 12 is driven to rotate, so that the end tooth 120 pushes the rotating rod 20 to stop in the locked position, when manually closing, the latch 141 of the operating mechanism abuts against the rotating rod 20 to restrict the rotation of the latch 141.

[0039] The relevant components of the circuit breaker are housed in the housing 10. The electric operating mechanism 12 includes multiple gears that are connected in sequence. The gears are driven by a motor. The motor and PCB board 13 are connected by a signal. When the PCB board 13 receives a signal, it controls the motor to start and stop, thereby controlling the rotation of each gear in the electric operating mechanism 12.

[0040] The end gear 120 is the gear furthest from the motor in the electric operating mechanism 12. When the circuit breaker is not allowed to close due to abnormal conditions such as reverse battery connection, open circuit, or short circuit, the PCB board 13 receives the command that closing is not allowed. At this time, each gear rotates in sequence, and the end gear 120 at the very end of the gear transmission chain rotates to push the rotating rod 20 to rotate and stop in the locked position. When manually closing, the latch 141 of the operating mechanism abuts against the rotating rod 20 to restrict the rotation of the latch 141, thereby preventing manual closing operation under abnormal conditions, so as to ensure the operation safety of the circuit breaker under abnormal conditions.

[0041] The circuit breaker provided in this application embodiment can control the rotation of the electric operating mechanism 12 via the PCB board 13. When the PCB board 13 receives an instruction that closing is not allowed under abnormal conditions, the electric operating mechanism 12 is driven to rotate, causing the end gear 120 to rotate and push the rotating rod 20 to rotate and stop in the locked position. When manually closing, the latch 141 of the operating mechanism abuts against the rotating rod 20, restricting the rotation of the latch 141 and preventing manual closing. The operating mechanism cannot perform manual closing operation, realizing the operation that does not allow manual closing under abnormal conditions, thereby ensuring the operation safety of the circuit breaker. The end gear 120, rotating rod 20 and latch 141 of this application are all set in the housing 10, which can simplify the overall structure of the circuit breaker and make it able to meet the requirements of miniaturization scenarios.

[0042] Specifically, such as Figure 9 As shown, a limiting boss 120a and an actuating rod 120b are provided on the end face of the end tooth 120. Figure 2 A micro switch 18 is also provided on the PCB board 13. The trigger rod 120b is used to trigger the micro switch 18 on the PCB board 13 under the command that closing is not allowed, so that the end tooth 120 stops in the locked position. The limiting boss 120a of the end tooth 120 pushes the rotating rod 20 to rotate and stop in the locked position. When closing manually, the latch 141 of the operating mechanism abuts against the rotating rod 20.

[0043] A micro switch 18 is installed on the PCB board 13. When the PCB board 13 receives a command to disallow closing, the end tooth 120 rotates, and the trigger rod 120b of the end tooth 120 triggers the micro switch 18. The micro switch 18 feeds back the locked position signal, causing the PCB board 13 to transmit the signal to the motor, which stops rotating. Consequently, the electric operating mechanism 12 and the end tooth 120 both stop rotating, and the end tooth 120 stops in the locked position. The limiting boss 120a of the end tooth 120 pushes the rotating rod 20 to rotate and stop in the locked position. When manually closing the circuit, the latch 141 of the operating mechanism abuts against the rotating rod 20, restricting the rotation of the latch 141, so that the operating mechanism cannot operate the closing, thus realizing the operation of disallowing manual closing under abnormal circumstances.

[0044] The latch 141 is rotatably disposed inside the housing 10. The latch 141 has an elongated end 141a. When the rotating rod 20 and the latch 141 abut, the elongated end 141a of the latch 141 abuts against the rotating rod 20 to restrict the latch 141.

[0045] Furthermore, Figure 9The limiting boss 120a and the trigger rod 120b of the end tooth 120 are provided on the same side end face of the end tooth 120. The circumferential surface of the end tooth 120 is also provided with a first meshing tooth 120c that meshes with the handle 11. Correspondingly, the handle 11 is provided with a sector tooth. The end tooth 120 meshes with the handle 11 through the meshing of the first meshing tooth 120c and the sector tooth of the handle 11 to drive the transmission.

[0046] The end tooth 120 is also provided with a second meshing tooth 120d, which meshes with its adjacent upper gear for transmission.

[0047] like Figure 9 As shown, the actuating rod 120b can be a structure protruding from the end face of the end tooth 120; in other embodiments, the actuating rod 120b is a magnet, and the micro switch 18 on the PCB board 13 is a Hall switch.

[0048] A Hall effect switch is a solid-state electronic device that utilizes the Hall effect. Using a magnetic field as its working medium, it converts the motion parameters of an object into a digital voltage output, thus enabling it to perform sensing and switching functions. The Hall effect device, in conjunction with a magnet, causes the trigger rod at the end of the tooth 120 to actuate the microswitch 18 at an appropriate time.

[0049] The rotating rod 20 is provided with a connecting hole 200. The rotating rod 20 is rotatably mounted in the housing 10 through the connecting hole 200. The handle 11 is provided with a sector tooth. The end tooth 120 is provided with a first meshing tooth 120c that meshes with the sector tooth. A limiting groove 120e is provided on one side of the first meshing tooth 120c on the end tooth 120. The groove wall of the limiting groove 120e forms a limiting surface 120f. The rotating rod 20 moves within the space reserved between the limiting groove 120e and the sector tooth.

[0050] The rotating rod 20 is kept in contact with the handle 11, which ensures that the rotating rod 20 can always be in contact with the latch 141 and restrict the rotation of the latch 141. Otherwise, the rotating rod 20 will be pushed to rotate with the latch 141, and the restriction of the latch 141 under abnormal circumstances cannot be guaranteed.

[0051] Regarding the rotating rod 20, in some embodiments, as shown in 3, a first elongated portion 201 and a limiting portion 202 are respectively provided on both sides of the connecting hole 200 of the rotating rod 20. For example, with the connecting hole 200 as the intersection point, the first elongated portion 201 and the limiting portion form an obtuse angle. The first elongated portion 201 has a first working surface 201a that acts on the handle 11 and a second working surface 201b that acts on the limiting surface 120f of the end tooth 120. The limiting portion 202 is used to abut against the latch 141.

[0052] When the PCB board 13 receives a closing command, the trigger rod 120b of the end tooth 120 triggers the micro switch 18 on the PCB board 13, causing the end tooth 120 to stop in the closing position. When a closing command is received, the end tooth 120 rotates, pushing the rotating rod 20 through the limiting boss 120a. The first action surface 201a of the rotating rod 20 pushes the handle 11 to rotate in the opening direction. After passing the dead point, the handle 11 rotates to the opening position under the action of the opening compression spring and the handle 11 spring. At the same time, the trigger rod 120b of the end tooth 120 triggers the micro switch 18 on the PCB board 13, causing the end tooth 120 to stop in the opening position. Figure 4 , Figure 5 As shown.

[0053] The handle 11 spring is sleeved on the handle 11, and its two ends are connected to the handle 11 and the housing 10, respectively. The tripping spring is located inside the housing 10 and sleeved on the rotating shaft of the moving contact. Its two ends are connected to the moving contact and the housing 10, respectively, for the purpose of tripping the circuit breaker. Under normal circumstances, the tripping spring is in a compressed state to keep the moving contact and the stationary contact tightly closed, maintaining the circuit's continuity. When a circuit fault occurs, such as overload, short circuit, or grounding, the PCB board 13 sends a signal, and the tripping spring is released, which helps the moving contact quickly disengage from the stationary contact, cutting off the circuit and protecting electrical equipment and personal safety.

[0054] Figure 6 This shows the circuit breaker in the closed position via electric means. Figure 7 This shows the circuit breaker in the closed position manually. Figure 8 This is a schematic diagram showing the state of the micro switch 18 triggered by the trigger rod 120b of the end tooth 120 when the circuit is closed.

[0055] Furthermore, regardless of whether the circuit breaker is currently in the closed or open state, a return spring 20a is also provided inside the connection hole 200 of the rotating rod 20. The two ends of the return spring 20a are respectively connected to the rotating rod 20 and the housing 10, such as... Figure 6 , Figure 7 As shown, when the end tooth 120 stops in the closed position, the rotating rod 20 contacts the limiting surface 120f of the end tooth 120 under the action of the return spring 20a.

[0056] In other embodiments, such as Figure 10a , Figure 10b As shown, a second extension 203 is provided at one end of the connecting hole 200 of the rotating rod 20. The second extension 203 is also bent. The second extension 203 has a third working surface 203a that acts with the latch 141 and a fourth working surface 203b that contacts the limiting surface 120f of the end tooth 120.

[0057] like Figure 11As shown, by setting the rotating rod 20, the manual closing of the operating mechanism can also be restricted under abnormal circumstances, at which time the end tooth 120 stops in the locked position.

[0058] When the end tooth 120 rotates normally for closing or opening under command, the trigger rod 120b triggers the micro switch 18 on the PCB board 13, causing the end tooth 120 to stop in the closed position. Figure 13 , Figure 14 As shown, where Figure 13 This is a schematic diagram showing the circuit breaker in the closed position via electric means. Figure 14 This is a schematic diagram showing the circuit breaker in the closed position via manual operation.

[0059] When a tripping command is received, the end tooth 120 rotates, causing the limiting boss 120a to push against the rotating rod 20. The third limiting surface 120f of the rotating rod 20 pushes the latch 141 to rotate, causing the operating mechanism to disassemble and trip, achieving rapid tripping and improving the performance of the circuit breaker. The handle 11 rotates to the tripping position under the action of the tripping spring and the handle 11 spring. Simultaneously, the trigger rod 120b of the end tooth 120 triggers the microswitch 18 on the PCB board 13, stopping the end tooth 120 in the tripping position. Figure 12 As shown.

[0060] In addition, refer to Figure 14 As shown, the operating mechanism also includes a mechanism base 140, on which a slide groove 140a is provided. A connecting rod 142 is also provided between the handle 11 and the latch 141. In the closed state, one end of the connecting rod 142 is located in the slide groove 140a of the mechanism base 140.

[0061] When a tripping command is received, one end of the connecting rod 142 slides out of the slide groove 140a, thereby disassembling the operating mechanism to trip the circuit breaker.

[0062] Therefore, the circuit breaker provided in this application embodiment has a locked position, an open position, and a closed position. When the trigger rod 120b of the end tooth 120 is triggered, the end tooth 120 can be stopped in the corresponding position state. When the end tooth 120 is stopped in the set locked position, the operating mechanism can be restricted from closing under abnormal conditions (closing is not allowed or the battery is reversed).

[0063] In addition, such as Figure 4 As shown, a shunt 17 is also installed inside the circuit breaker. The shunt 17 is connected to the main circuit high current and PCB board 13. The shunt 17 is used to collect the voltage of the circuit breaker and monitor the circuit breaker.

[0064] The circuit breaker is also equipped with an electromagnetic trip unit 16, which is used for the electromagnetic tripping of the circuit breaker. In this application, the electromagnetic trip unit 16 is vertically arranged between the operating mechanism and the electric operating mechanism 12.

[0065] The circuit breaker is also equipped with an arc extinguishing channel 19 (arc extinguishing chamber) and a signal terminal 15. The arc extinguishing channel 19 and the signal terminal 15 are arranged side by side and are both located on the outgoing side. The arc extinguishing channel 19 is used to extinguish the arc generated by the moving contact and the stationary contact, and the signal terminal 15 is used to collect the circuit information of the load circuit connected to the moving contact and the stationary contact in the circuit breaker.

[0066] The above layout makes full use of the internal space of the circuit breaker, allowing for a reasonable arrangement of the circuit breaker's components, thereby reducing the overall size of the circuit breaker and making it suitable for miniaturized applications.

[0067] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A circuit breaker, characterized in that, include: The housing (10) contains an electric operating mechanism (12), a PCB board (13), an operating mechanism, and a rotating rod (20). The electric operating mechanism (12) and the PCB board (13) are linked by signals. The electric operating mechanism (12) also includes an end tooth (120) that meshes with a handle (11). When the PCB board (13) receives a command that the circuit is not allowed to be closed, the electric operating mechanism (12) is driven to rotate, causing the end tooth (120) to push the rotating rod (20) to rotate and stop in the locked position. When the circuit is closed manually, the latch (141) of the operating mechanism abuts against the rotating rod (20) to restrict the rotation of the latch (141).

2. The circuit breaker according to claim 1, characterized in that, The end face of the end tooth (120) is provided with a limiting boss (120a) and a trigger rod (120b). The PCB board (13) is also provided with a micro switch (18). The trigger rod (120b) is used to trigger the micro switch (18) on the PCB board (13) under the command that closing is not allowed, so that the end tooth (120) stops in the locked position. The limiting boss (120a) of the end tooth (120) pushes the rotating rod (20) to rotate and stop in the locked position. When closing manually, the latch (141) of the operating mechanism abuts against the rotating rod (20) to restrict the rotation of the latch (141).

3. The circuit breaker according to claim 1 or 2, characterized in that, The rotating rod (20) is provided with a connecting hole (200). The rotating rod (20) is rotatably disposed in the housing (10) through the connecting hole (200). The handle (11) is provided with a sector tooth. The end tooth (120) is provided with a first meshing tooth (120c) that meshes with the sector tooth. The end tooth (120) is provided with a limiting groove (120e) on one side of the first meshing tooth (120c). The rotating rod (20) moves within the space reserved between the limiting groove (120e) and the sector tooth.

4. The circuit breaker according to claim 3, characterized in that, The connecting hole (200) is provided with a first extension (201) and a limiting part (202) on both sides respectively. The first extension (201) has a first working surface (201a) that acts with the handle (11), and the limiting part (202) is used to abut against the latch (141). When the PCB board (13) receives a closing command, the trigger rod (120b) of the end tooth (120) triggers the micro switch (18) on the PCB board (13), causing the end tooth (120) to stop in the closing position; when a closing command is received, the end tooth (120) rotates, pushing the rotating rod (20) through the limiting boss (120a), and the first working surface (201a) of the rotating rod (20) pushes the handle (11) to rotate to the closing position in the opening direction. At the same time, the trigger rod (120b) of the end tooth (120) triggers the micro switch (18) on the PCB board (13), causing the end tooth (120) to stop in the closing position.

5. The circuit breaker according to claim 3, characterized in that, One end of the connecting hole (200) is provided with a second extension (203), and the second extension (203) has a third working surface (203a) that interacts with the latch (141); When the end tooth (120) rotates normally for closing and opening, the trigger rod (120b) triggers the micro switch (18) on the PCB board (13) to stop the end tooth (120) in the closed position. When a closing command is received, the end tooth (120) rotates to push the limiting boss (120a) against the rotating rod (20). The third working surface (203a) of the rotating rod (20) pushes the latch (141) to rotate, causing the operating mechanism to disassemble and open. The handle (11) rotates to the open position, and at the same time, the trigger rod (120b) of the end tooth (120) triggers the micro switch (18) on the PCB board (13) to stop the end tooth (120) in the open position.

6. The circuit breaker according to claim 5, characterized in that, The operating mechanism also includes a mechanism seat (140), on which a slide groove (140a) is provided. A connecting rod (142) is also provided between the handle (11) and the latch (141). In the closed state, one end of the connecting rod (142) is located in the slide groove (140a) of the mechanism seat (140). When a tripping command is received, one end of the connecting rod (142) slides out of the slide groove (140a) to disassemble the operating mechanism and trip the circuit.

7. The circuit breaker according to any one of claims 4 to 6, characterized in that, A handle spring is fitted on the handle (11), and a tripping spring is provided inside the housing (10). The handle (11) rotates to the tripping position under the action of the handle spring and the tripping spring.

8. The circuit breaker according to any one of claims 4 to 6, characterized in that, A reset spring (20a) is provided in the connecting hole (200) of the rotating rod (20). The groove wall of the limiting groove (120e) of the end tooth (120) forms a limiting surface (120f). The two ends of the reset spring (20a) are respectively connected to the rotating rod (20) and the housing (10). When the end tooth (120) stops in the closed position, the rotating rod (20) contacts the limiting surface (120f) of the end tooth (120) under the action of the reset spring (20a).

9. The circuit breaker according to claim 2, characterized in that, The limiting boss (120a) and the trigger rod (120b) are disposed on the same side end face of the end tooth (120).

10. The circuit breaker according to claim 2, characterized in that, The trigger rod (120b) is a magnet, and the micro switch (18) on the PCB board (13) is a Hall switch.

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