A two-button structure fault protection circuit breaker

Abstract

The utility model discloses a kind of fault protection circuit breaker of double-button structure, including shell, handle operating mechanism, contact module, and tripping mechanism, further include: leakage protection module and arc fault protection module, the inside installation of shell has arc protection sensor and leakage protection sensor;Test module, leakage test component and arc fault test component are provided in the shell;Circuit board component, the circuit board component includes at least two pieces of subarea arrangement electronic component board.In the utility model, through the setting of double-button insulation isolation, the independent self-checking of leakage and arc fault protection function is realized, can simulate fault signal by pressing corresponding test button, the passage formed by test piece, conducting torsion spring and circuit board component is transmitted to tripping mechanism, the effectiveness of protection link is verified quickly, while compartment structure blocks signal crosstalk, improve the reliability of protection function and electrical safety.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a fault protection circuit breaker with a double-button structure. Background Technology

[0002] In the field of low-voltage electrical systems, circuit breakers, as core equipment for circuit safety protection, are widely used in scenarios such as household distribution boxes. They mainly achieve safety protection for circuits and electrical equipment by integrating functions such as overload, short circuit, and leakage protection.

[0003] While current mainstream miniature circuit breakers can meet basic circuit fault protection needs, their functional limitations are becoming increasingly apparent with the diversification of power usage scenarios and the improvement of safety standards. Most current products only have a leakage current test button and lack a dedicated arc fault protection testing mechanism. Users cannot periodically verify the effectiveness of the arc fault protection link through simple operations. If the arc protection module or transmission mechanism malfunctions, the protection may fail when an arc fault occurs in the circuit, potentially leading to fires and other safety risks. Furthermore, the few products that integrate dual testing functions often lack proper layout and isolation design, making them difficult to fit into the limited installation space of circuit breakers. They are also prone to test signal crosstalk, resulting in inaccurate self-test results and failing to meet users' needs for independent and reliable verification of both types of protection functions.

[0004] To address the aforementioned shortcomings, a fault protection circuit breaker with a dual-button structure is provided. Utility Model Content

[0005] The purpose of this utility model is to provide a fault protection circuit breaker with a dual-button structure to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a fault protection circuit breaker with a dual-button structure, comprising a housing, a handle operating mechanism, a contact module, and a tripping mechanism, and further comprising: Leakage protection module and arc fault protection module: An arc protection sensor and a leakage protection sensor are installed inside the housing. The arc protection sensor monitors the arc characteristic signal in the circuit, and the leakage protection sensor detects the current state in the circuit. Test module: The housing is provided with a leakage current test component and an arc fault test component, and an insulating isolator is provided between the leakage current test component and the arc fault test component; The circuit board assembly includes at least two electronic component boards arranged in separate areas, and the test module, leakage protection module and arc fault protection module are electrically connected through the circuit board assembly.

[0007] Preferably, the insulating isolator is a partitioned chamber structure formed inside the housing, which isolates the leakage current test assembly from the arc fault test assembly on the housing.

[0008] Preferably, the circuit board assembly includes a leakage current function electronic component board, a connection electronic component board, and an arc protection electronic component board. Each electronic component board is arranged sequentially along the internal area of ​​the housing, and the electronic component boards are electrically connected to each other through conductive connectors.

[0009] Preferably, both the leakage current testing component and the arc fault testing component include: The test piece is electrically connected to the connection electronic component board and is electrically connected to the printed conductors of the connection electronic component board; An elastic actuation structure is installed on the housing. External actuation causes the test piece to deform under pressure, thus connecting the test circuit.

[0010] Preferably, the elastic actuation structure includes an arc test button and a leakage current test button, both of which are elastically mounted in the housing by a pressure spring.

[0011] Preferably, the housing is further provided with a conductive torsion spring, which is electrically connected between the test piece and the tripping mechanism, and transmits the tripping signal to the tripping mechanism when the test circuit is connected.

[0012] Preferably, the contact module includes an L-pole contact system and an N-pole contact system. The N-pole contact system includes an N-pole straight-through conductor. The N-pole contact system maintains the electrical connection between the N-pole incoming terminal and the outgoing terminal in both the closed and open states of the circuit breaker through the N-pole straight-through conductor.

[0013] Preferably, the leakage current protection sensor and the arc protection sensor are arranged side by side in the width direction inside the housing and staggered in the thickness direction to adapt to the internal space of the housing.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this application, the independent self-test of leakage current and arc fault protection functions is realized by setting up double-button insulation isolation. By pressing the corresponding test button, a fault signal can be simulated and transmitted to the tripping mechanism through the path formed by the test piece, conductive torsion spring and circuit board assembly, which can quickly verify the effectiveness of the protection link. At the same time, the partition chamber structure blocks signal crosstalk, which improves the reliability of the protection function and the safety of electricity use.

[0015] 2. In this application, by arranging multiple electronic component boards in different areas and compactly arranging sensors, the routing of soft wires is reduced, improving the processability and reducing the risk of arc burn-out. While ensuring stable circuit operation, the circuit breaker structure is made more compact, adapting to the usage requirements of narrow installation scenarios. Attached Figure Description

[0016] Figure 1 A schematic diagram of the internal structure of a circuit breaker according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of a test module provided according to an embodiment of the present invention is shown.

[0017] Legend: 1. Housing; 2. Handle operating mechanism; 3. Contact module; 4. Tripping mechanism; 5. Arc protection sensor; 6. Leakage protection sensor; 7. Leakage function electronic component board; 8. Connection electronic component board; 9. Arc protection electronic component board; 10. Test piece; 11. Arc test button; 12. Leakage test button; 13. Pressure spring; 14. Conductive torsion spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a fault protection circuit breaker with a dual-button structure, including a housing 1, a handle operating mechanism 2, a contact module 3, and a tripping mechanism 4.

[0020] The housing 1 serves as the mounting and protective base for the circuit breaker, providing a closed and insulated installation space for the handle operating mechanism 2, contact module 3, tripping mechanism 4, and internal protection components. It also ensures the positioning and fixation of each component, guaranteeing structural stability and electrical safety. The handle operating mechanism 2 is the component for manually controlling the circuit breaker's on / off operation. Manual operation drives the internal mechanical linkage to achieve the closing or opening operation of the contact module 3. The contact module 3 includes L and N pole contacts. When closed, the contacts close to form a conductive path, supplying power to the circuit. When opened, the contacts open to cut off the current, serving as the execution unit for circuit on / off. The tripping mechanism 4, as the fault protection execution mechanism, receives fault signals from the leakage current protection module and arc fault protection module, and quickly drives the mechanical structure to open the contact module 3, achieving emergency power disconnection in scenarios such as leakage current and arc faults.

[0021] Also includes: Leakage protection module and arc fault protection module: Arc protection sensor 5 and leakage protection sensor 6 are installed inside the housing 1. Arc protection sensor 5 monitors the arc characteristic signal in the circuit, and leakage protection sensor 6 detects the current state in the circuit.

[0022] The leakage current protection module and the arc fault protection module work together to achieve circuit safety protection. The arc protection sensor 5 installed in the housing 1 monitors the characteristic signals generated by abnormal arcs in the circuit in real time, and the leakage current protection sensor 6 continuously detects the current balance between the live wire and the neutral wire. When leakage occurs and causes a difference in the current between the two, the two types of sensors capture the corresponding fault signals and transmit them to the circuit board assembly. After judgment, the tripping mechanism 4 is triggered to quickly cut off the circuit to avoid risks such as electric shock and fire.

[0023] Test module: The housing 1 is equipped with a leakage current test component and an arc fault test component, and an insulating isolator is provided between the leakage current test component and the arc fault test component.

[0024] The testing module uses independently configured leakage current testing and arc fault testing components to perform self-tests on the leakage current protection and arc fault protection functions. These components are physically and electrically isolated from each other by insulating isolators to prevent signal interference or circuit crosstalk during testing. When verifying the protection function, pressing the corresponding testing component simulates a leakage current or arc fault signal, which is transmitted to the relevant protection module via the circuit board assembly. If the module and subsequent tripping mechanism 4 respond normally, it proves that the corresponding protection function is effective. Through independent testing and isolation protection, the reliability and self-test accuracy of both types of protection functions are ensured.

[0025] The circuit board assembly includes at least two electronic component boards arranged in separate areas. The test module, leakage protection module and arc fault protection module are electrically connected through the circuit board assembly.

[0026] The leakage current protection sensor 6 of the leakage current protection module and the arc protection sensor 5 of the arc fault protection module transmit the captured fault signals to the corresponding electronic component boards. The simulated fault signals triggered by the test module are also simultaneously connected to the circuit board components. After each component board completes the reception, analysis and judgment of the signals through the preset circuit, it quickly outputs control signals to drive the tripping mechanism 4 to act. At the same time, it realizes the orderly transmission of signals and functional coordination between modules, ensuring the accurate response and stable operation of the protection circuit breaker.

[0027] Specifically, such as Figure 2 As shown, the insulating isolation component is a partitioned chamber structure formed inside the housing 1, which isolates the leakage current test component and the arc fault test component on the housing 1.

[0028] The partitioned chamber structure formed inside the housing 1 spatially separates the leakage current test component and the arc fault test component, thereby blocking electrical interference and circuit crosstalk between the two types of test components and preventing the simulated fault signals from affecting each other during testing. When pressing any test component triggers a self-test, the partitioned chamber ensures that the corresponding test circuit is independently conductive, allowing the simulated fault signal to be accurately transmitted to the circuit board components. This ensures the self-test accuracy of the leakage current protection and arc fault protection functions, and improves the insulation safety and operational stability of the circuit breaker's internal structure.

[0029] The circuit board assembly includes a leakage current function electronic component board 7, a connection electronic component board 8, and an arc protection electronic component board 9. These electronic component boards are arranged sequentially along the internal area of ​​the housing 1, and are electrically connected to each other via conductive connectors. The conductive connectors are existing gold-plated pin header-female header connectors.

[0030] The leakage current protection electronic component board 7 receives and processes the current difference signal from the leakage current protection sensor 6, while the arc protection electronic component board 9 receives and analyzes the arc characteristic signal from the arc protection sensor 5. Connecting electronic component board 8 serves as an intermediate hub, enabling signal transmission between the two functional component boards. Simultaneously, simulated fault signals from the test module are input, and finally, after judgment, a drive signal is output to the tripping mechanism 4. This ensures that each module functions independently yet can respond collaboratively. Furthermore, the multi-board, zoned arrangement matches the internal space of the circuit breaker, resulting in a compact circuit breaker structure and saving space.

[0031] Both the leakage current testing kit and the arc fault testing kit include: Test piece 10 is electrically connected to the connection electronic component board 8 and is electrically connected to the printed wires of the connection electronic component board 8; An elastic actuation structure is installed on the housing 1. The test piece 10 is deformed by external actuation to conduct the test circuit.

[0032] The test piece 10 is directly electrically connected to the printed wires of the connecting electronic component board 8, forming a signal path between the test circuit and the control system. The elastic actuation structure set on the housing 1 will apply pressure to the test piece 10 after external pressing or other actuation operations, causing it to deform and thus connecting the preset test circuit. This allows the simulated fault signal to be transmitted to the connecting electronic component board 8 through the test piece 10, ultimately realizing the self-test verification of the corresponding protection function.

[0033] The elastic actuation structure includes an arc test button 11 and a leakage test button 12, both of which are elastically mounted in the housing 1 by a pressure spring 13.

[0034] The housing 1 is also provided with a conductive torsion spring 14, which is electrically connected between the test piece 10 and the tripping mechanism 4. When the test circuit is connected, the torsion spring 14 transmits the tripping signal to the tripping mechanism 4.

[0035] Pressing the corresponding test button overcomes the spring force of the pressure spring 13 to trigger the action, and after releasing, it resets through the pressure spring 13. When any test button is pressed, the corresponding test circuit is activated, simulating a fault signal that is transmitted through the test piece 10 to the conductive torsion spring 14. The conductive torsion spring 14 then accurately transmits the trip signal to the tripping mechanism 4, driving it to perform the tripping action, thereby realizing the self-test verification of the leakage current or arc fault protection function.

[0036] Specifically, such as Figure 1 As shown, the contact module 3 includes an L-pole contact system and an N-pole contact system. The N-pole contact system maintains the electrical connection between the N-pole incoming terminal and the outgoing terminal through the N-pole straight-through conductor in both the closed and open states of the circuit breaker.

[0037] The N-pole contact system, through a straight-through N-pole conductor, can maintain a stable electrical connection with the outgoing terminals in both the closed and open states of the circuit breaker, adapting to the requirements of continuous N-pole conduction in low-voltage circuits. At the same time, it works in conjunction with leakage current protection modules and arc fault protection modules to ensure the safe and stable operation of the circuit under various operating conditions.

[0038] Specifically, such as Figure 1 As shown, the leakage current protection sensor 6 and the arc protection sensor 5 are arranged side by side in the width direction inside the housing 1 and staggered in the thickness direction to fit the internal space of the housing 1.

[0039] The compact layout of the leakage current protection sensor 6 and the arc protection sensor 5, while adapting to the limited space inside the housing 1, ensures that the two types of sensors are accurately aligned with the monitoring circuit, stably capturing the leakage current difference signal and the arc characteristic signal, thus ensuring the regularity of the overall structure of the circuit breaker and its operational reliability.

[0040] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fault protection circuit breaker with a dual-button structure, comprising a housing (1), a handle operating mechanism (2), a contact module (3), and a tripping mechanism (4), characterized in that, Also includes: Leakage protection module and arc fault protection module: An arc protection sensor (5) and a leakage protection sensor (6) are installed inside the housing (1). The arc protection sensor (5) monitors the arc characteristic signal in the circuit, and the leakage protection sensor (6) detects the current state in the circuit. Test module: The housing (1) is provided with a leakage current test component and an arc fault test component, and an insulating isolation component is provided between the leakage current test component and the arc fault test component; The circuit board assembly includes at least two electronic component boards arranged in separate areas, and the test module, leakage protection module and arc fault protection module are electrically connected through the circuit board assembly.

2. The fault protection circuit breaker with a dual-button structure according to claim 1, characterized in that, The insulating isolation component is a partitioned chamber structure formed inside the housing (1), which isolates the leakage current test component from the arc fault test component on the housing (1).

3. A fault protection circuit breaker with a dual-button structure according to claim 1, characterized in that, The circuit board assembly includes a leakage current function electronic component board (7), a connection electronic component board (8), and an arc protection electronic component board (9). Each electronic component board is arranged sequentially along the internal area of ​​the housing (1), and the electronic component boards are electrically connected to each other through conductive connectors.

4. A fault protection circuit breaker with a dual-button structure according to claim 3, characterized in that, Both the leakage current testing component and the arc fault testing component include: Test piece (10), the test piece (10) is electrically connected to the connection electronic component board (8) and electrically connected to the printed wires of the connection electronic component board (8); An elastic actuation structure is installed on the housing (1). The test piece (10) is deformed by external actuation to conduct the test circuit.

5. A fault protection circuit breaker with a dual-button structure according to claim 4, characterized in that, The elastic actuation structure includes an arc test button (11) and a leakage test button (12), both of which are elastically mounted in the housing (1) by a pressure spring (13).

6. A fault protection circuit breaker with a dual-button structure according to claim 5, characterized in that, The housing (1) is also provided with a conductive torsion spring (14), which is electrically connected between the test piece (10) and the tripping mechanism (4) and transmits the tripping signal to the tripping mechanism (4) when the test circuit is turned on.

7. A fault protection circuit breaker with a dual-button structure according to claim 1, characterized in that, The contact module (3) includes an L-pole contact system and an N-pole contact system. The N-pole contact system maintains the electrical connection between the N-pole incoming terminal and the outgoing terminal through the N-pole straight-through conductor in both the closed and open states of the circuit breaker.

8. A fault protection circuit breaker with a dual-button structure according to claim 1, characterized in that, The leakage current protection sensor (6) and the arc protection sensor (5) are arranged side by side in the width direction inside the housing (1) and staggered in the thickness direction to fit the internal space of the housing (1).

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