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, an operating mechanism and a PCB board arranged in the shell, the electric operating mechanism and the PCB board are signal-linked, the electric operating mechanism further comprises a terminal tooth engaged with a handle, when the PCB board receives an instruction that does not allow closing, the electric operating mechanism is driven to rotate, and the terminal tooth is stopped at a locking position; when manually closing, a lock catch of the operating mechanism abuts against the terminal tooth to limit the rotation of the lock catch. The rotation of the electric operating mechanism can be controlled through the PCB board, the terminal tooth at the end of the transmission in the electric operating mechanism is engaged with the handle, when the PCB board receives an instruction that does not allow closing under abnormal conditions, the electric operating mechanism is driven to rotate the terminal tooth to the locking position, the rotation of the lock catch can be limited, and the operating mechanism cannot be closed, thereby realizing the operation that does not allow manual closing under abnormal conditions, ensuring the operation safety of the circuit breaker; the overall structure is simplified, the operation is convenient, and the circuit breaker can be applied to the scene demand of miniaturization.

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. Under abnormal conditions, such as when a short circuit or open circuit occurs, the circuit breaker is not allowed to close under these circumstances to ensure safe operation. Currently, some circuit breakers have mechanisms to prevent closing under abnormal conditions; however, these mechanisms are complex, resulting in a bulky overall structure that is not conducive to miniaturized circuit breaker applications. 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, thus ensuring the safety of the circuit breaker. It also has a simple structure and does not occupy too much space.

[0004] In one aspect of this application, a circuit breaker is provided, including a housing, an electric operating mechanism, an operating mechanism, and a PCB board 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 that closing is not permitted, the electric operating mechanism is driven to rotate, causing the end tooth to stop in a locked position. When manually closing the circuit, the latch of the operating mechanism abuts against the end tooth 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 to stop the end tooth in the locked position when the command to disallow closing is given. When the circuit is manually closed, the latch of the operating mechanism abuts against the limiting boss of the end tooth to restrict the rotation of the latch.

[0006] Optionally, the latch is rotatably disposed within the housing, and the latch has an elongated end for abutting against the limiting boss of the end tooth.

[0007] Optionally, the limiting boss and the trigger rod are respectively disposed on two opposite end faces of the end teeth, and the circumferential surface of the end teeth is also provided with a first meshing tooth that meshes with the handle, and a second meshing tooth that meshes with the upper gear of the electric operating mechanism.

[0008] Optionally, the actuating rod is a magnet, and the micro switch on the PCB board is a Hall switch.

[0009] Optionally, when the abnormal state that prevents closing is cleared, the PCB board receives a return command, and the electric operating mechanism is driven to rotate the end gear and stop at the open position, so that manual opening and closing operations can be performed.

[0010] Optionally, in the open state, the PCB board receives a closing command to remotely and electrically close the circuit. The end tooth is driven to rotate and engages with the handle to drive the operating mechanism to close the circuit. The trigger rod on the end tooth triggers the micro switch on the PCB board to stop the end tooth in the closed position, allowing for manual opening and closing operations.

[0011] Optionally, in the closed state, the PCB board receives a tripping command to remotely and electrically trip the circuit breaker. The end tooth is driven to rotate, and the limiting boss of the end tooth pushes the latch to rotate, thereby driving the operating mechanism to trip the circuit breaker. The trigger rod on the end tooth triggers the micro switch on the PCB board to stop the end tooth in the tripping position.

[0012] Optionally, the operating mechanism further includes a mechanism seat, the mechanism seat is provided with a slide groove, and the handle and the latch of the operating mechanism are connected by a connecting rod. When the switch is closed, one end of the connecting rod is located in the slide groove.

[0013] When the PCB board receives the tripping command while the circuit is closed, the limiting boss of the end tooth pushes the latch to rotate, so that one end of the connecting rod slides out of the groove, and the operating mechanism disassembles and trips.

[0014] Optionally, the handle is provided with a return spring, under the action of the return spring, the connecting rod is reset, and the latch is reset to the initial locked state.

[0015] The circuit breaker provided in this application embodiment can control the rotation of the electric operating mechanism via a PCB board. The end gear of the last drive in the electric operating mechanism engages with the handle. When the PCB board receives an instruction that closing is not allowed under abnormal conditions, the electric operating mechanism is driven to rotate, and the end gear rotates to the locking position, which can restrict the rotation of the latch, thereby preventing the operating mechanism from performing the closing operation. This realizes the operation of not allowing manual closing under abnormal conditions, which is used to ensure the operational safety of the circuit breaker. Furthermore, the overall structure is simplified, the operation is convenient, and it can be applied to miniaturized scenarios. Attached Figure Description

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Figure 3 This is a schematic diagram of the circuit breaker's open position (electric and manual) status provided in the embodiments of this application;

[0020] Figure 4 This is a schematic diagram of the circuit breaker closed position (electric) state provided in the embodiments of this application;

[0021] Figure 5 This is a schematic diagram of the circuit breaker closed position (manual) state provided in the embodiments of this application;

[0022] Figure 6a This is one of the schematic diagrams of the circuit breaker end tooth structure provided in the embodiments of this application;

[0023] Figure 6b This is the second schematic diagram of the circuit breaker end tooth structure provided in the embodiments of this application.

[0024] Icons: 10-Housing; 11-Handle; 12-Electrical operating mechanism; 120-End tooth; 120a-Limit boss; 120b-Actuating rod; 120c-First meshing tooth; 120d-Second meshing tooth; 13-PCB board; 140-Mechanism base; 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. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0026] 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.

[0027] 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.

[0028] 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, an operating mechanism and a PCB board 13 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 engages 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 stops in the locked position, when manually closing, the latch 141 of the operating mechanism abuts against the end tooth 120 to restrict the rotation of the latch 141.

[0029] The housing 10 contains components related to the circuit breaker. The electric operating mechanism 12 includes multiple gears that are connected in sequence. The electric operating mechanism 12 is driven to rotate by a motor or other driving components. The motor and the PCB board 13 are connected by a signal. When the PCB board 13 receives a signal, it controls the start and stop of the motor, thereby controlling the rotation of each gear in the electric operating mechanism 12.

[0030] The gear furthest from the motor in the electric operating mechanism 12 is the end gear 120, which meshes with the handle 11. When the circuit breaker malfunctions and is not allowed to close, such as when the battery is reversed, or when there is an open circuit or short circuit, the PCB board 13 receives a command that closing is not allowed. At this time, the electric operating mechanism 12 is driven to rotate until the end gear 120 stops in the locked position. When manually closing, the latch 141 of the operating mechanism abuts against the end gear 120 to restrict the rotation of the latch 141, thereby preventing manual closing operations under abnormal conditions and ensuring the operational safety of the circuit breaker under abnormal conditions.

[0031] The circuit breaker provided in this application embodiment can control the rotation of the electric operating mechanism 12 via the PCB board 13. The end gear 120 of the most end drive in the electric operating mechanism 12 engages with the handle 11. 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, and the end gear 120 rotates to the locking position, which can restrict the rotation of the latch 141, thereby preventing the operating mechanism from performing the closing operation. This realizes the operation of not allowing manual closing under abnormal conditions, which is used to ensure the operational safety of the circuit breaker. Furthermore, the overall structure is simplified, the operation is convenient, and it can be applied to miniaturized scenarios.

[0032] Specifically, such as Figure 2 , Figure 6a , Figure 6b As shown, a limiting boss 120a and a trigger rod 120b are provided on the end face of the end tooth 120. 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 to stop the end tooth 120 in the locked position when the command to not close the circuit is given. When the circuit is closed manually, the latch 141 of the operating mechanism abuts against the limiting boss 120a of the end tooth 120, thereby restricting the rotation of the latch 141.

[0033] A microswitch 18 is installed on the PCB board 13. When the PCB board 13 receives a command to disallow closing, the end tooth 120 rotates, causing the trigger rod 120b of the end tooth 120 to trigger the microswitch 18. The microswitch 18 feeds back a locked position signal, causing the PCB board 13 to transmit a 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. When manually closing the circuit, the limiting boss 120a of the end tooth 120 abuts against the latch 141, locking the latch 141. At this time, if the circuit is manually closed via the handle 11, the operating mechanism cannot be operated to close the circuit because the latch 141 is restricted from rotating. This allows for the operation of disallowing manual closing under abnormal circumstances.

[0034] The latch 141 is rotatably disposed inside the housing 10. The latch 141 has an elongated end 141a. When the end tooth 120 abuts against the latch 141, the elongated end 141a of the latch 141 abuts against the limiting boss 120a of the end tooth 120 to restrict the latch 141.

[0035] Furthermore, in the embodiments of this application, the limiting boss 120a and the trigger rod 120b are respectively disposed on two opposite end faces of the end tooth 120, and the circumferential surface of the end tooth 120 is also provided with a first meshing tooth 120c that meshes with the handle 11, and a second meshing tooth 120d that meshes with the adjacent upper gear.

[0036] from Figure 1 As can be seen, the limiting boss 120a is located on the front of the end tooth 120 facing the reader, while the trigger rod 120b is located on the back of the end tooth 120, which facilitates triggering the micro switch 18 on the PCB board 13.

[0037] At the same time, refer to Figure 6a , Figure 6b The end tooth 120 is also provided with a first meshing tooth 120c and a second meshing tooth 120d on its circumferential surface. The end tooth 120 is driven by meshing with the sector teeth on the handle 11 through the first meshing tooth 120c, and by meshing with the adjacent upper gear through the second meshing tooth 120d, so as to transmit the power transmitted by the motor through the electric operating mechanism 12 to the end tooth 120.

[0038] like Figure 6b 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.

[0039] 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. In conjunction with a magnet, the Hall effect switch causes the actuating rod 120b of the end tooth 120 to trigger the microswitch 18 at an appropriate time.

[0040] As mentioned above, when closing is not allowed, the locking latch 141 is restricted by the limiting boss 120a of the end tooth 120, which can prevent manual closing.

[0041] When the abnormal state that prevents closing is cleared, PCB board 13 receives a return command, and the electric operating mechanism 12 is driven to rotate the end gear 120 and stop in the open position. At this time, manual opening and closing operations can be performed. Figure 3 As shown.

[0042] Among them, the micro switch 18 has an open position. The trigger rod 120b of the end tooth 120 triggers the micro switch 18, which can stop the end tooth 120 from rotating in the open position.

[0043] In the open state, the PCB board 13 receives the closing command to remotely and electrically close the circuit. The end tooth 120 is driven to rotate and meshes with the handle 11. The handle 11 drives the operating mechanism to close the circuit. The touch rod 120b on the end tooth 120 triggers the micro switch 18 on the PCB board 13 to stop the end tooth 120 in the closed position. At this time, manual opening and closing operations can be performed. Figure 4 This shows the state of the circuit breaker when it is in the closed position electrically. Figure 5 This shows the state of the circuit breaker when it is in the closed position manually.

[0044] When the circuit is closed, the PCB board 13 receives the opening command to remotely and electrically open the circuit. The end tooth 120 is driven to rotate, and the limiting boss 120a of the end tooth 120 pushes the latch 141 to rotate, which drives the operating mechanism to open the circuit. The trigger rod 120b on the end tooth 120 triggers the micro switch 18 on the PCB board 13 to stop the end tooth 120 in the open position.

[0045] In the embodiments of this application, the operating mechanism further includes a mechanism base 140, which is provided with a slide groove 140a. The handle 11 and the latch 141 of the operating mechanism are connected by a connecting rod 142. For example, the connecting rod 142 can be a U-shaped connecting rod 142. When the circuit is closed, one end of the connecting rod 142 is placed in the slide groove 140a. When the circuit is closed, when the PCB board 13 receives the circuit breaker command, the limiting boss 120a of the end tooth 120 pushes the latch 141 to rotate, and one end of the connecting rod 142 slides out from the slide groove 140a, and the operating mechanism disassembles and the circuit is breaker- ...

[0046] When the PCB board 13 receives the tripping command while the circuit is closed, the end tooth 120 rotates counterclockwise. The limiting boss 120a on the end tooth 120 pushes the latch 141 of the operating mechanism to rotate, and the connecting rod 142 slides out of the slide groove 140a of the mechanism seat 140, causing the operating mechanism to disintegrate and trip.

[0047] In addition, a return spring is provided inside the handle 11. The two ends of the return spring are connected to the handle 11 and the housing 10 respectively. Under the action of the return spring, the connecting rod 142 is reset and the latch 141 is reset to the initial locked state.

[0048] 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 triggers the micro switch 18, the end tooth 120 can be stopped in the corresponding position. When the upper limit boss 120a of 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). In addition, the upper limit boss 120a of the end tooth 120 can also open normally by directly turning the latch 141 to disassemble the operating mechanism for opening, which can achieve the effect of fast opening and improve the performance indicators of the circuit breaker.

[0049] In addition, refer to Figure 1 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.

[0050] 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 (electric operating mechanism 12).

[0051] 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.

[0052] 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.

[0053] 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), an operating mechanism, and a PCB board (13). 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 does not allow closing, the electric operating mechanism (12) is driven to rotate, causing the end tooth (120) to stop in the locked position. When closing manually, the latch (141) of the operating mechanism abuts against the end tooth (120) 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) to stop the end tooth (120) in the locked position when the circuit is not allowed to close. When the circuit is manually closed, the latch (141) of the operating mechanism abuts against the limiting boss (120a) of the end tooth (120) to restrict the rotation of the latch (141).

3. The circuit breaker according to claim 2, characterized in that, The latch (141) is rotatably disposed within the housing (10). The latch (141) has an elongated end (141a) which is used to abut against the limiting boss (120a) of the end tooth (120).

4. The circuit breaker according to claim 2, characterized in that, The limiting boss (120a) and the trigger rod (120b) are respectively disposed on two opposite end faces 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) and a second meshing tooth (120d) that meshes with the upper gear of the electric operating mechanism (12).

5. 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.

6. The circuit breaker according to any one of claims 2 to 5, characterized in that, When the abnormal state that prevents closing is cleared, the PCB board (13) receives a return command, and the electric operating mechanism (12) is driven to rotate the end tooth (120) to stop in the open position, so that manual opening and closing operations can be performed.

7. The circuit breaker according to claim 6, characterized in that, In the open state, the PCB board (13) receives the closing command to remotely and electrically close the circuit. The end tooth (120) is driven to rotate and engages with the handle (11) to drive the operating mechanism to close the circuit. The trigger rod (120b) on the end tooth (120) triggers the micro switch (18) on the PCB board (13) so that the end tooth (120) stops at the closed position, and manual opening and closing operations can be performed.

8. The circuit breaker according to claim 6, characterized in that, In the closed state, the PCB board (13) receives the opening command to remotely and electrically open the circuit. The end tooth (120) is driven to rotate. The limiting boss (120a) of the end tooth (120) pushes the latch (141) to rotate, thereby driving the operating mechanism to open the circuit. The trigger rod (120b) on the end tooth (120) triggers the micro switch (18) on the PCB board (13) so that the end tooth (120) stops in the open position.

9. The circuit breaker according to claim 8, characterized in that, The operating mechanism also includes a mechanism seat (140), the mechanism seat (140) is provided with a slide groove (140a), the handle (11) and the latch (141) of the operating mechanism are connected by a connecting rod (142), and when the circuit is closed, one end of the connecting rod (142) is located in the slide groove (140a); When the PCB board (13) receives the tripping command while the circuit is closed, the limiting boss (120a) of the end tooth (120) pushes the latch (141) to rotate, so that one end of the connecting rod (142) slides out of the groove (140a), and the operating mechanism disintegrates and trips.

10. The circuit breaker according to claim 9, characterized in that, The handle (11) is provided with a reset spring. Under the action of the reset spring, the connecting rod (142) is reset and the latch (141) is reset to the initial locked state.

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