Ground fault circuit interrupter with ground protection

Abstract

This invention relates to the field of circuit breaker technology, and more particularly to a residual current circuit breaker with grounding protection function. The technical solution includes: a circuit breaker body, and an electrical connection module installed on the circuit breaker body; the electrical connection module includes a socket with a socket hole, and the socket hole contains a receiving groove, a first clamping component, a fixing component, and a second clamping component; the fixing component is connected to the first clamping component via a pull wire. This invention triggers the fixing component by pushing in the cable, which in turn triggers the first clamping component to automatically clamp the cable, and simultaneously triggers the second clamping component to form a bidirectional clamping, while using electromagnetic adsorption to achieve self-locking; upon release, the adsorption is released electronically, and all components automatically reset. This achieves rapid, tool-free, reliable connection and convenient release of the cable, effectively avoiding the problems of easy loosening and cumbersome operation associated with traditional screw connections, and significantly improving the stability and operational safety of the grounding connection.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically to a residual current circuit breaker with grounding protection function. Background Technology

[0002] A residual current circuit breaker (RCCB) is a critical protective electrical appliance used to automatically disconnect power when a line or equipment experiences a leakage current or grounding fault, preventing electric shock and electrical fires. It is widely used in industrial, commercial, and residential power distribution systems. In practical applications, the reliability of the RCCB's connection to external cables is crucial, directly affecting the ultimate realization of the entire protection function and electrical safety.

[0003] Currently, most residual current circuit breakers (RCCBs) on the market connect external cables using traditional screw-type crimp terminals. During operation, a screwdriver or similar tool is needed to loosen the terminal screw, insert the cable conductor, and then tighten the screw, relying on the mechanical pressure of the screw to press the cable into the conductive clip. This connection method has several inherent drawbacks in practical use: First, the reliability of the connection is highly dependent on manual operation. Insufficient tightening torque can easily lead to increased contact resistance, causing localized overheating or even a fire; excessive torque may damage the cable or threads. Second, during long-term operation, factors such as stress relaxation of the metal material, environmental vibration, or thermal cycling can easily cause the screw crimp to loosen, leading to poor contact and an abnormally increased resistance in the grounding protection circuit, posing a potential risk of protection failure. Finally, when repairing or replacing cables, the disassembly process also requires tools, making operation inconvenient and inefficient in confined or poorly lit distribution boxes.

[0004] Therefore, how to design a residual current circuit breaker electrical connection structure that can achieve fast, reliable, tool-free cable connection and locking, ensure stable low-resistance contact during long-term operation, and safely and conveniently release the cable when needed has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a residual current circuit breaker with grounding protection function, thus solving the problems mentioned in the background art.

[0006] The solution of the present invention to the above-mentioned technical problems is as follows:

[0007] This invention provides a residual current circuit breaker with grounding protection function, comprising:

[0008] The circuit breaker body and the electrical connection module installed on the circuit breaker body; the electrical connection module includes a socket, the socket having a socket hole, the socket having a receiving groove, a first clamping component, a fixing component and a second clamping component; the fixing component and the first clamping component are connected by a pull wire.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the circuit breaker body is provided with a limiting block, and the electrical connection module is installed by limiting the position of the limiting block; the circuit breaker body is provided with a fixing hole, and a bolt for clamping and fixing the electrical connection module is installed in the fixing hole; the back of the circuit breaker body is provided with a slot, and a switch and a test button are provided on the opposite side.

[0011] The beneficial effects of adopting the above-mentioned further solutions are:

[0012] The limiting block enables pre-positioning of the electrical connection module, ensuring quick and accurate alignment with the main body's electrical interface and simplifying the assembly process. Final tightening is then achieved using bolts within the fixing holes, guaranteeing the module's secure installation and preventing internal damage caused by misalignment. The rear slot design facilitates standard installation of the circuit breaker on the distribution rail, while the placement of the switch and test buttons on opposite sides of the front conforms to ergonomic principles, making operation and functional testing highly convenient and improving the overall usability and installation / maintenance efficiency of the product.

[0013] Furthermore, the receiving groove is formed through the insertion hole, and the first clamping assembly is installed in the receiving groove; the fixing assembly is installed at the bottom end of the insertion hole; the second clamping assembly is installed in the insertion hole on the side opposite to the receiving groove.

[0014] The beneficial effects of adopting the above-mentioned further solutions are:

[0015] The receiving slot provides a dedicated and concealed storage space for the first clamping assembly, ensuring it does not obstruct the socket channel when not in operation and allowing for smooth cable insertion. The fixing assembly is placed at the bottom of the socket, allowing it to directly receive the axial thrust of the inserted cable, serving as the initial power source for the entire linkage mechanism, making the triggering logic direct and effective. The second clamping assembly is positioned on the opposite side, creating a spatial opposition with the first clamping assembly and providing the structural basis for bidirectional clamping. This layout results in a compact internal structure, clear action paths, distinct functions for each component, and efficient collaboration, maximizing the use of limited space.

[0016] Furthermore, the fixing component includes a push plate, a third connecting plate is provided on one side of the push plate, and a permanent magnet is installed at its bottom end; the push plate is installed at the bottom end of the socket by a first spring, and the end of the first spring away from the push plate is connected and fixed to the circuit breaker body; an electromagnet corresponding to the position of the permanent magnet is installed at the bottom end of the socket.

[0017] The beneficial effects of adopting the above-mentioned further solutions are:

[0018] The push plate, as the direct sensing component, converts the mechanical insertion of the cable into the initial displacement of the mechanism. The first spring provides the necessary reset force for the push plate and ensures that the push plate is in the ready-to-trigger position when the cable is not inserted. After the cable is inserted, the electromagnet is energized or the permanent magnet's properties generate an attractive force, firmly attracting the push plate to the permanent magnet at the bottom of the push plate, thus locking the push plate in the pressed state. This means that the entire clamping system obtains a stable holding force, maintaining clamping without continuous external force, resulting in extremely high connection reliability. When release is required, simply controlling the electromagnet current to generate a repulsive force overcomes the attractive force and uses the energy stored in the first spring to reset the push plate. The control method is simple, reliable, and labor-saving.

[0019] Furthermore, the first clamping assembly includes a rotating shaft with the pull wire wound around it; the rotating shaft is provided with a first connecting plate and a second connecting plate, and an eccentric wheel is sleeved on the rotating shaft between the first connecting plate and the second connecting plate, the rotating shaft being rotatably mounted in the eccentric wheel; the edge of the eccentric wheel is provided with locking teeth; a sliding groove is provided on the rotating shaft behind the second connecting plate, and a locking block that cooperates with the sliding groove is provided in the socket; the end of the rotating shaft opposite to the first connecting plate is mounted in the socket by a second spring.

[0020] The beneficial effects of adopting the above-mentioned further solutions are:

[0021] The pull cable converts the linear motion of the push plate into the rotational motion of the shaft. A groove on the shaft and a fixed locking block form a rotation-translation conversion mechanism, forcing the shaft to move axially while rotating. The first and second connecting plates serve as selective engagement interfaces with the eccentric wheel, allowing the shaft to drive the eccentric wheel to rotate separately during insertion and extraction processes in different directions of movement. The eccentric wheel itself amplifies the small-angle rotation of the shaft into a large radial displacement of its rim, generating a strong clamping force. Its edge teeth effectively engage with the cable surface, providing excellent anti-slip performance. The second spring provides axial reset power to the shaft and drives the mechanism to reverse when the tension in the pull cable disappears. The entire assembly transforms a single pull force input into a series of mechanical conversions, ultimately outputting a powerful, self-locking radial clamping force, resulting in high mechanical efficiency and reliable operation.

[0022] Furthermore, the end of the pull wire facing away from the rotating shaft is connected and fixed to the third connecting plate.

[0023] The beneficial effects of adopting the above-mentioned further solutions are:

[0024] By directly fixing one end of the pull wire to the third connecting plate of the push plate, the most direct force transmission path from the push plate to the rotating shaft is established. This connection method has a simple structure, reliable connection points, and minimal energy loss during force transmission. It ensures that the displacement and speed of the push plate can be accurately and promptly converted into driving action on the rotating shaft, guaranteeing the response sensitivity and action consistency of the entire linkage mechanism, and avoiding the risk of action delay or failure that may be caused by too many intermediate links.

[0025] Furthermore, the second clamping assembly includes a conductive electrode sheet and a clamping plate, wherein the conductive electrode sheet and the clamping plate are movably connected by a lever; the lever is rotatably mounted in the socket by a pin, and its two ends are rotatably connected to the clamping plate and the conductive electrode sheet by a first connecting shaft and a connecting seat, respectively; the clamping plate is provided with anti-slip teeth.

[0026] The beneficial effects of adopting the above-mentioned further solutions are:

[0027] The conductive electrode plate serves as both an electrical contact and a mechanical trigger sensor. When the cable is pushed to this side by the first clamping assembly, it compresses the conductive electrode plate. The lever mechanism uses a pin as a fulcrum to convert and amplify the backward force on the conductive electrode plate into a clamping force that drives the clamping plate forward, achieving effective force transmission and gain. The anti-slip teeth on the clamping plate and the locking teeth on the eccentric wheel act on the cable from both sides, forming an interlocking texture that greatly increases static friction, firmly anchoring the cable and significantly enhancing its resistance to pulling and vibration. At the same time, the lever connection method ensures the smoothness of the clamping plate's movement and adaptability to cable diameters.

[0028] Furthermore, the eccentric wheel is disposed within the receiving groove.

[0029] The beneficial effects of adopting the above-mentioned further solutions are:

[0030] The eccentric wheel is housed within a through-hole by default, allowing it to be completely hidden when not in use and preventing it from protruding from the socket wall and interfering with the initial cable insertion. The recessed area guides and protects the eccentric wheel, ensuring its accurate rotation trajectory and preventing external objects from directly impacting the eccentric wheel mechanism. This design results in a smooth and clean inner wall of the socket, facilitating cable insertion and improving the structural integrity and lifespan of the entire electrical connection module.

[0031] Furthermore, the electromagnet is electrically connected to the circuit breaker body.

[0032] The beneficial effects of adopting the above-mentioned further solutions are:

[0033] By connecting an electromagnet to the internal circuitry of the circuit breaker, the energization and de-energization control of the electromagnet can be linked to specific state-specific operations of the circuit breaker. For example, the electromagnet can be automatically activated to release the cable after the circuit breaker trips, or cable clamping status detection can be integrated into the testing process. This electrical connection upgrades the mechanical clamping and release mechanism to a controlled electric actuator, making cable clamping and release an integral part of the overall circuit breaker function, thus improving the product's automation level and operational safety.

[0034] As can be seen, the residual current circuit breaker with grounding protection function provided by this invention has the following beneficial effects:

[0035] When the cable is inserted into the socket, a simple push triggers a chain reaction involving the push plate, pull wire, rotating shaft, and eccentric wheel, ultimately causing the eccentric wheel to automatically clamp the cable. This process is fully automated, eliminating the need for screwdrivers or other tools for tightening, greatly simplifying wiring steps and improving installation efficiency. More importantly, this automatic clamping mechanism eliminates the risk of loose connections or cable damage caused by insufficient or excessive manual tightening, ensuring consistent and reliable mechanical fastening for every connection, fundamentally improving the initial quality of the connection.

[0036] As the eccentric wheel presses the cable down from one side, it drives the cable to press against the conductive electrode plate on the opposite side, which in turn pushes the clamping plate to hold the cable from the other side via a lever mechanism. This bidirectional pressing structure forms a robust, enveloping fixation, effectively resisting cable swaying and pulling forces in all directions, preventing loosening of the connection due to vibration or external forces. The stable mechanical connection directly ensures consistently good electrical contact, reduces contact resistance, minimizes the risk of overheating, and thus improves the electrical safety and reliability of the entire circuit breaker during long-term operation.

[0037] The release mechanism is controlled by the interaction between an electromagnet and a permanent magnet. Simply changing the direction of the electromagnet current generates a repulsive force that resets the push plate. Then, by loosening the pull wire, the eccentric wheel and clamp plate are automatically triggered to retract, allowing the cable to be easily pulled out. The entire process does not require direct contact with live parts or the use of tools, avoiding damage to screws and cables during disassembly. It achieves quick and non-destructive disconnection, making it particularly suitable for applications requiring frequent replacement or maintenance of wiring.

[0038] The eccentric wheel's locking teeth and the clamping plate's anti-slip teeth significantly increase static friction with the cable surface, providing strong resistance to pull-out. Furthermore, the push plate remains locked in the clamped state through the attraction of a permanent magnet and an electromagnet, ensuring the clamping force is consistently maintained and will not diminish over time or with slight vibrations. The entire clamping and releasing process is completed inside the sealed socket, preventing direct contact with live parts and moving mechanisms, effectively preventing accidental contact and electric shock risks.

[0039] Reliable linkage is achieved through simple mechanical principles such as pull wires and levers, with an ingenious structural design that is easy to manufacture and assemble. This module can be directly adapted to standard circuit breaker bodies without altering the main circuit breaker structure, facilitating industrial production and upgrades of existing products. The resulting improvements in wiring reliability, ease of operation, and enhanced safety are of positive significance for improving the overall operation and maintenance level of low-voltage power distribution systems. Attached Figure Description

[0040] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0041] In the attached diagram:

[0042] Figure 1 This is a schematic diagram of the main appearance of the present invention;

[0043] Figure 2 This is a rear view diagram of the present invention;

[0044] Figure 3 This is a schematic diagram of the front cross-sectional structure of the socket of the present invention;

[0045] Figure 4 This is a schematic diagram of the rear cross-sectional structure of the socket of the present invention;

[0046] Figure 5 This is a schematic diagram of the socket structure from below in cross-section according to the present invention;

[0047] Figure 6 This is a schematic diagram of the main structure of the first clamping assembly of the present invention;

[0048] Figure 7 This is a rear view schematic diagram of the first clamping assembly of the present invention;

[0049] Figure 8 This is a schematic diagram of the push plate structure from below according to the present invention;

[0050] Figure 9 This is a schematic diagram of the front cross-sectional structure of the second clamping assembly of the present invention;

[0051] Figure 10 This is a rear cross-sectional view of the second clamping assembly of the present invention.

[0052] The attached diagram lists the components represented by each number as follows:

[0053] 1. Circuit breaker body; 101. Limit block; 102. Fixing hole; 103. Switch; 104. Test button; 105. Slot; 2. Electrical connection module; 201. Receiving slot; 202. Socket; 203. Socket hole; 3. First clamping assembly; 301. Rotating shaft; 302. Eccentric wheel; 303. First connecting plate; 304. Second connecting plate; 305. Slide groove; 306. Second spring; 307. Clamping tooth; 4. Fixing assembly; 401. Permanent magnet; 402. First spring; 403. Electromagnet; 404. Third connecting plate; 405. Push plate; 5. Second clamping assembly; 501. Clamping plate; 502. Anti-slip tooth; 503. Conductive electrode plate; 504. Lever; 505. First connecting shaft; 506. Pin; 507. Connecting seat; 6. Pull wire. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Please see Figures 1 to 10 As shown, the embodiments provided by the present invention are as follows:

[0056] Example 1

[0057] Residual current circuit breakers with grounding protection function include:

[0058] The circuit breaker body 1 and the electrical connection module 2 installed on the circuit breaker body 1; the electrical connection module 2 includes a socket 202, the socket 202 is provided with a socket 203, the socket 203 is provided with a receiving groove 201, a first clamping component 3, a fixing component 4 and a second clamping component 5; the fixing component 4 and the first clamping component 3 are connected by a pull wire 6.

[0059] Example 2

[0060] To optimize the assembly structure and operational convenience of the circuit breaker body and electrical connection module, for example, such as Figures 1 to 10 As shown, the present invention also includes:

[0061] The circuit breaker body 1 is equipped with a limiting block 101, through which the electrical connection module 2 is positioned and installed. A fixing hole 102 is provided on the circuit breaker body 1, within which bolts are installed to clamp and fix the electrical connection module 2. A slot 105 is provided on the back of the circuit breaker body 1, with a switch 103 and a test button 104 on the opposite side. The limiting block 101 achieves pre-positioning of the electrical connection module 2, ensuring quick and accurate alignment with its electrical interface to the body, simplifying the assembly process. Finally, the bolts in the fixing hole 102 are used for final tightening, ensuring the module's secure installation and preventing internal damage caused by misalignment. The design of the back slot 105 facilitates standard installation of the circuit breaker on a distribution rail, while placing the switch 103 and test button 104 on opposite sides of the front conforms to ergonomics, making operation and functional testing very convenient, improving the overall usability and installation / maintenance efficiency of the product.

[0062] Example 3

[0063] To optimize the internal spatial layout of the socket to achieve synergy among the components, for example, such as Figures 1 to 10 As shown, the present invention also includes:

[0064] A receiving groove 201 extends through the socket 203, and a first clamping component 3 is installed within the receiving groove 201. A fixing component 4 is installed at the bottom of the socket 203. A second clamping component 5 is installed within the socket 203 on the side opposite to the receiving groove 201. The receiving groove 201 provides a dedicated and concealed storage space for the first clamping component 3, ensuring it does not occupy the socket 203 channel when not in operation, thus allowing for smooth cable insertion. Placing the fixing component 4 at the bottom of the socket 203 allows it to directly receive the axial thrust of the inserted cable, serving as the initial power source for the entire linkage mechanism, making the triggering logic direct and effective. The second clamping component 5 is positioned on the opposite side, creating a spatial opposition with the first clamping component 3, thus providing a structural basis for bidirectional clamping. This layout results in a compact internal structure, clear action paths, distinct functions for each component, and efficient collaboration, maximizing the use of limited space.

[0065] The second clamping assembly 5 includes a conductive electrode plate 503 and a clamping plate 501. The conductive electrode plate 503 and the clamping plate 501 are movably connected by a lever 504. The lever 504 is rotatably mounted in the socket 202 via a pin 506, and its two ends are rotatably connected to the clamping plate 501 and the conductive electrode plate 503 via a first connecting shaft 505 and a connecting seat 507, respectively. The clamping plate 501 is provided with anti-slip teeth 502. The conductive electrode plate 503 serves as both an electrical contact and a mechanical trigger sensor. When the cable is pushed to this side by the first clamping assembly 3, it compresses the conductive electrode plate 503. The lever 504 mechanism uses the pin 506 as a fulcrum to convert and amplify the backward force on the conductive electrode plate 503 into a clamping force that drives the clamping plate 501 forward, thus achieving effective force transmission and amplification. The anti-slip teeth 502 on the clamping plate 501 and the locking teeth 307 on the eccentric wheel 302 work together on the cable from both sides, forming an interlocking texture that greatly increases static friction, firmly anchoring the cable and significantly enhancing its resistance to pulling and vibration. At the same time, the lever 504 connection method ensures the smooth movement of the clamping plate 501 and its adaptability to cable diameter.

[0066] Example 4

[0067] To explain in detail the core structural components and working principle of the automatic clamping and releasing mechanism, for example, such as Figures 1 to 10 As shown, the present invention also includes:

[0068] The fixing component 4 includes a push plate 405, with a third connecting plate 404 on one side and a permanent magnet 401 mounted on its bottom end. The push plate 405 is mounted on the bottom end of the socket 203 via a first spring 402, and the end of the first spring 402 facing away from the push plate 405 is connected and fixed to the circuit breaker body 1. An electromagnet 403 corresponding to the position of the permanent magnet 401 is mounted on the bottom end of the socket 203. The push plate 405, as a direct sensing component, converts the mechanical insertion action of the cable into the initial displacement of the mechanism. The first spring 402 provides the necessary reset force for the push plate 405 and ensures that the push plate 405 is in the ready-to-trigger position when the cable is not inserted. After the cable is inserted, the electromagnet 403 is energized or uses the characteristics of the permanent magnet 401 to generate attraction, firmly attracting the permanent magnet 401 at the bottom end of the push plate 405, thereby locking the push plate 405 in the pressed state. This means that the entire clamping system obtains a stable holding force, maintaining clamping without continuous external force, resulting in extremely high connection reliability. When release is required, simply controlling the current of electromagnet 403 to generate a repulsive force overcomes the attraction force, and the energy stored in the first spring 402 resets the push plate 405. This control method is simple, reliable, and labor-saving. Electromagnet 403 is electrically connected to the circuit breaker body 1, integrating it into the internal circuitry of the circuit breaker body 1. This allows the on / off control of electromagnet 403 to be linked to specific operations of the circuit breaker. For example, electromagnet 403 can be automatically activated to release the cable after the circuit breaker trips, or cable clamping status detection can be integrated into the testing process. This electrical connection upgrades the mechanical clamping release mechanism to a controlled electric actuator, making cable clamping and release an integral part of the overall circuit breaker function, thus improving the product's automation level and operational safety.

[0069] The first clamping assembly 3 includes a rotating shaft 301 with a pull wire 6 wound around it. The rotating shaft 301 has a first connecting plate 303 and a second connecting plate 304. An eccentric wheel 302 is fitted onto the rotating shaft 301 between the first connecting plate 303 and the second connecting plate 304. The eccentric wheel 302 is positioned within a receiving groove 201, allowing it to be retracted by default within the through-hole groove 201, ensuring it is completely hidden when not in operation and preventing it from protruding from the socket 203 wall and interfering with the initial insertion of the cable. The receiving groove 201 guides and protects the eccentric wheel 302, ensuring its accurate rotation trajectory and preventing external foreign objects from directly colliding with the eccentric wheel 302 mechanism. This design makes the inner wall of the socket 203 smooth and clean, which facilitates cable insertion and improves the structural integrity and service life of the entire electrical connection module 2. The rotating shaft 301 is rotatably mounted in the eccentric wheel 302; the edge of the eccentric wheel 302 is provided with a retaining tooth 307; the rotating shaft 301 is provided with a sliding groove 305 behind the second connecting plate 304, and the socket 202 is provided with a retaining block that cooperates with the sliding groove 305; the end of the rotating shaft 301 opposite to the first connecting plate 303 is installed in the socket 202 through the second spring 306, and the pull wire 6 converts the linear motion of the push plate 405 into the rotational motion of the rotating shaft 301. The sliding groove 305 on the rotating shaft 301 and the fixed retaining block form a rotation and translation conversion mechanism, forcing the rotating shaft 301 to move axially while rotating. The first connecting plate 303 and the second connecting plate 304 serve as selective engagement interfaces with the eccentric wheel 302, so that the rotating shaft 301 can drive the eccentric wheel 302 to rotate in different directions of movement, corresponding to the insertion and extraction processes. The eccentric wheel 302 amplifies the small-angle rotation of the shaft 301 into a large radial displacement of the wheel rim, thereby generating a strong clamping force. Its edge teeth 307 effectively engage with the cable surface, providing excellent anti-slip performance. The second spring 306 provides axial reset power to the shaft 301 and drives the mechanism in the reverse direction when the tension of the cable 6 disappears. The entire assembly transforms a single tensile input into a series of mechanical conversions, ultimately outputting a powerful, self-locking radial clamping force, resulting in high mechanical efficiency and reliable operation.

[0070] One end of the pull wire 6, away from the rotating shaft 301, is connected and fixed to the third connecting plate 404. This directly fixes one end of the pull wire 6 to the third connecting plate 404 of the push plate 405, establishing the most direct force transmission path from the push plate 405 to the rotating shaft 301. This connection method is simple in structure, reliable in connection points, and minimizes energy loss during force transmission. It ensures that the displacement and speed of the push plate 405 are accurately and promptly converted into driving action on the rotating shaft 301, guaranteeing the response sensitivity and consistency of the entire linkage mechanism and avoiding the risk of action delay or failure due to too many intermediate links.

[0071] Working principle:

[0072] When a cable needs to be connected, insert the cable into the socket 203. The inserted end of the cable first contacts the push plate 405 at the bottom of the socket 203, pushing the push plate 405 to compress the first spring 402 and move downwards. The downward movement of the push plate 405 pulls the pull cable 6 through the third connecting plate 404 on its side. When the pull cable 6 is pulled, it drives the connected rotating shaft 301 to start rotating. The rotational movement of the rotating shaft 301 is converted into the lateral movement of the rotating shaft 301 by the cooperation of the locking block in the socket 202 and the sliding groove 305 on the rotating shaft 301, while compressing the second spring 306. During this process, the rotating shaft 301 engages with the eccentric wheel 302 through the first connecting plate 303, causing the eccentric wheel 302 to rotate eccentrically. The eccentric wheel 302 unscrews from the receiving groove 201 on the side wall of the socket 203, and its edge teeth 307 press tightly into the cable surface, thereby achieving initial mechanical locking of the cable and effectively preventing the cable from accidentally coming out. At the same time, as the push plate 405 moves down to the bottom, the permanent magnet 401 at its bottom attracts each other with the electromagnet 403 fixedly installed at the bottom of the socket 203, keeping the push plate 405 stably in the pressed position, thereby maintaining the tension of the pull cable 6 and ensuring that the first clamping assembly 3 is in the locked state.

[0073] During the action of the first clamping assembly 3 and its clamping of the cable, the cable simultaneously moves to the other side of the socket 203 and presses against the conductive electrode plate 503. The conductive electrode plate 503 moves backward under force, and this movement is transmitted through a lever 504 mechanism. The lever 504 rotates around its central pin 506, converting the backward movement of one end connected to the conductive electrode plate 503 into a forward movement of the other end connected to the clamping plate 501, thereby pushing the clamping plate 501 towards the cable. The anti-slip teeth 502 on the clamping plate 501 and the eccentric wheel 302 act together on the cable from opposite sides, forming a bidirectional clamping effect, further enhancing the stability of the cable connection and the reliability of the electrical contact.

[0074] When the cable needs to be removed, the current direction of the electromagnet 403 is changed by the control circuit, causing its magnetic poles to reverse. At this time, a repulsive force is generated between the electromagnet 403 and the permanent magnet 401 at the bottom of the push plate 405. This repulsive force overcomes the tension of the first spring 402, pushing the push plate 405 to return to its original position. The rise of the push plate 405 causes the pull cable 6 to loosen and lose tension. The rotating shaft 301 moves laterally in the opposite direction under the action of the second spring 306. During the movement, the rotating shaft 301 engages with the eccentric wheel 302 again through the second connecting plate 304 on it, driving the eccentric wheel 302 to rotate in the opposite direction, causing it to retract into the receiving groove 201 on the side wall of the socket 203, thereby completely releasing the clamping force on the cable. At the same time, as the cable pressure is released, the conductive electrode plate 503 returns to its original position under the action of the lever 504 mechanism, driving the clamping plate 501 to retract, and the cable can be easily pulled out.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A residual current circuit breaker with grounding protection function, characterized in that, include: The circuit breaker body (1) and the electrical connection module (2) installed on the circuit breaker body (1); the electrical connection module (2) includes a socket (202), the socket (202) is provided with a socket hole (203), the socket hole (203) is provided with a receiving groove (201), a first clamping component (3), a fixing component (4) and a second clamping component (5); the fixing component (4) is connected to the first clamping component (3) by a pull wire (6).

2. The residual current circuit breaker with grounding protection function according to claim 1, characterized in that: The circuit breaker body (1) is provided with a limiting block (101), and the electrical connection module (2) is installed by limiting the limit block (101); the circuit breaker body (1) is provided with a fixing hole (102), and a bolt for clamping and fixing the electrical connection module (2) is installed in the fixing hole (102); the back of the circuit breaker body (1) is provided with a slot (105), and a switch (103) and a test button (104) are provided on the opposite side.

3. The residual current circuit breaker with grounding protection function according to claim 1, characterized in that: The receiving groove (201) is opened through the insertion hole (203), and the first clamping component (3) is installed in the receiving groove (201); the fixing component (4) is installed at the bottom end of the insertion hole (203); the second clamping component (5) is installed in the insertion hole (203) on the side opposite to the receiving groove (201).

4. The residual current circuit breaker with grounding protection function according to claim 1, characterized in that: The fixing component (4) includes a push plate (405), a third connecting plate (404) is provided on one side of the push plate (405), and a permanent magnet (401) is installed at its bottom end; the push plate (405) is installed at the bottom end of the socket (203) by a first spring (402), and the end of the first spring (402) away from the push plate (405) is connected and fixed to the circuit breaker body (1); an electromagnet (403) corresponding to the position of the permanent magnet (401) is installed at the bottom end of the socket (203).

5. The residual current circuit breaker with grounding protection function according to claim 4, characterized in that: The first clamping assembly (3) includes a rotating shaft (301) on which the pull wire (6) is wound; the rotating shaft (301) is provided with a first connecting plate (303) and a second connecting plate (304); an eccentric wheel (302) is sleeved on the rotating shaft (301) between the first connecting plate (303) and the second connecting plate (304); the rotating shaft (301) is rotatably installed in the eccentric wheel (302); the edge of the eccentric wheel (302) is provided with a locking tooth (307); a sliding groove (305) is provided on the rotating shaft (301) behind the second connecting plate (304); a locking block that cooperates with the sliding groove (305) is provided in the socket (202); the end of the rotating shaft (301) away from the first connecting plate (303) is installed in the socket (202) by a second spring (306).

6. The residual current circuit breaker with grounding protection function according to claim 5, characterized in that: The end of the pull wire (6) facing away from the rotating shaft (301) is connected and fixed to the third connecting plate (404).

7. The residual current circuit breaker with grounding protection function according to claim 3, characterized in that: The second clamping assembly (5) includes a conductive electrode sheet (503) and a clamping plate (501). The conductive electrode sheet (503) and the clamping plate (501) are movably connected by a lever (504). The lever (504) is rotatably installed in the socket (202) by a pin (506). Its two ends are rotatably connected to the clamping plate (501) and the conductive electrode sheet (503) by a first connecting shaft (505) and a connecting seat (507), respectively. Anti-slip teeth (502) are provided on the clamping plate (501).

8. The residual current circuit breaker with grounding protection function according to claim 5, characterized in that: The eccentric wheel (302) is disposed in the receiving groove (201).

9. The residual current circuit breaker with grounding protection function according to claim 4, characterized in that: The electromagnet (403) is electrically connected to the circuit breaker body (1).

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