A single-phase circuit breaker having a bearing surface plated with nickel

Abstract

This utility model relates to the field of single-phase circuit breakers, specifically providing a single-phase circuit breaker with nickel-plated bearing surface. The utility model includes a circuit breaker body, with both the upper and lower parts of the body connected to an external power line via fastening mechanisms. The fastening mechanism includes a mounting cavity and a through hole. A stop block is movably mounted inside the mounting cavity. One side of the stop block forms a gap for clamping the line, and a pressure spring is elastically connected between the other side of the stop block and the mounting cavity. A toggle block is fixedly installed above the stop block, penetrating the circuit breaker body. This utility model, through the cooperation of the stop block and the pressure spring in the fastening mechanism, can pre-clamp the external power line within the gap. During wiring, there is no need for the operator to hold the line; the line can be directly inserted into the gap through the through hole to complete the initial fixation. This solves the problem of traditional single-phase circuit breaker wiring requiring holding the line and tightening screws, significantly reducing wiring difficulty and improving wiring efficiency.

Description

Technical Field

[0001] This utility model relates to the field of single-phase circuit breakers, and more particularly to a single-phase circuit breaker with nickel-plated bearing surface. Background Technology

[0002] A single-phase circuit breaker is a switching device used in single-phase circuits that can automatically disconnect the circuit and equipment in case of current overload or short circuit. It is mainly divided into three categories: 1P circuit breaker controls only the live wire, has thermal and magnetic tripping functions, has a simple structure and low cost, and is suitable for household lighting and low-power sockets; 1P+N circuit breaker can disconnect both the live and neutral wires at the same time, but only the live wire is protected, and its safety is better than 1P, making it suitable for socket circuits with high safety requirements.

[0003] The inventors of this application have discovered the following problems during practical use: Current single-phase circuit breakers can switch circuits on and off during use, but there is a problem in actual installation: the connection between traditional single-phase circuit breakers and external circuits is generally achieved by bolt connection. Specifically, the conductor of the exposed circuit is first placed inside the mounting cavity, and then the bolts are tightened. This requires the operator to support the circuit while tightening the bolts, which increases the difficulty of connecting the circuit to the circuit breaker. Therefore, the inventor urgently needs to design a single-phase circuit breaker with high wiring convenience.

[0004] Therefore, it is necessary to provide a single-phase circuit breaker with nickel-plated bearing surface to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the traditional single-phase circuit breaker bolt connection wiring has a high threshold for two-hand operation, resulting in low wiring efficiency. In view of the above-mentioned defects of the prior art, a single-phase circuit breaker with nickel-plated bearing surface is provided.

[0006] To achieve the above objectives, the technical solution of this utility model is: a single-phase circuit breaker with nickel plating on the bearing surface, comprising a circuit breaker body, wherein the upper and lower parts of the circuit breaker body are connected to an external power line via fastening mechanisms. The fastening mechanism includes a mounting cavity and a through hole. An abutment block is movably mounted inside the mounting cavity. A gap for clamping the line is formed on one side of the abutment block. A pressure spring is elastically connected between the other side of the abutment block and the mounting cavity. A toggle block is fixedly installed above the abutment block, penetrating the circuit breaker body. The abutment block pre-clamps the line in the gap by the elastic force of the pressure spring.

[0007] By adopting the above technical solution, the abutment block that is movably installed inside the mounting cavity, together with the pressure spring that is elastically connected between it and the mounting cavity, can pre-clamp the wire in the gap through the elastic force. This allows the operator to not need to continuously hold the wire when wiring. They only need to put the external power line through the through hole into the wire clamping gap on one side of the abutment block, and the elastic force of the pressure spring can automatically fix the wire initially. This greatly reduces the difficulty of wiring operations and improves the convenience of connecting the wire to the circuit breaker body. Especially in a narrow installation space, it can significantly reduce the number of operation steps and improve assembly efficiency.

[0008] Furthermore, the mounting cavity and the through hole are connected by a threaded hole, and a fastening screw is threaded on the inner side of the threaded hole.

[0009] By adopting the above technical solution, a reliable structural support is provided for the final stable fixation of the line. The interconnected design of the threaded hole allows the fastening screw to be precisely inserted into the installation cavity and directly act on the abutment block, avoiding the problem in traditional circuit breakers where the screw position is offset, which causes the clamping force to be unable to be effectively transmitted. This ensures that the force of the fastening screw can be accurately applied to the line clamping link.

[0010] Furthermore, the fastening screw abuts against one side of the abutment block, and the fastening screw is threadedly connected to the threaded hole, which is used to adjust the clamping force of the abutment block on the line.

[0011] By adopting the above technical solution, the connection requirements of external power cords of different specifications can be effectively adapted. In practical applications, the conductor diameter and material of external power cords may vary, and the required clamping force will also be different. Too loose a clamping force will lead to poor contact of the line, while too tight a clamping force may damage the conductor. By tightening the fastening screw, the clamping force of the abutment block on the line can be precisely adjusted according to the actual line conditions. This ensures reliable contact between the line and the abutment block and avoids damage to the line due to excessive clamping force, thus greatly improving the versatility and adaptability of the circuit breaker.

[0012] Furthermore, the actuating block is the point where the operator applies force to the abutment block, and the upper surface of the actuating block is provided with friction teeth.

[0013] By adopting the above technical solution, during wiring operations, operators can directly apply force to the toggle block to easily push or pull the abutment block to move within the mounting cavity, thereby adjusting the size of the clamping gap. This facilitates the insertion or removal of external power cables. Especially for personnel with less hand strength or who are not skilled in operation, the clear application point can significantly reduce the difficulty of operation and improve wiring efficiency.

[0014] Furthermore, the toggle block has a pressing tooth on one side surface near the gap, and the pressing tooth abuts against the external line.

[0015] By adopting the above technical solution, the tooth-like structure of the pressure tooth can increase the connection strength with the surface of the external line conductor. At the same time, the tooth tip can be slightly embedded in the conductor surface, effectively preventing the line from loosening or displacement due to vibration, external force pulling or temperature changes during use. This avoids the problem of poor contact caused by the line sliding easily in the traditional planar contact method.

[0016] Furthermore, a fixed clip is installed on the upper back of the circuit breaker body, and a movable clip is installed on the lower back of the circuit breaker body. The circuit breaker body is assembled and installed with the rail mounting plate in the electrical distribution system via the fixed clip and the movable clip.

[0017] By adopting the above technical solution, the fixing block can provide stable upper support for the circuit breaker body. During installation, the fixing block can be inserted into the corresponding slot of the track mounting plate to achieve the initial positioning of the circuit breaker body, which can significantly improve installation efficiency and safety.

[0018] Furthermore, a switch is rotatably mounted on the front side of the circuit breaker body via a bearing, and the surface of the bearing is nickel-plated.

[0019] By adopting the above technical solution, the rotation design of the bearing can reduce the friction when the switch rotates, making it easier for operators to operate the switch to turn the circuit on and off. It avoids the problems of switch rotation jamming and laborious operation in traditional bearingless structures. Especially for scenarios with frequent switch operation, it can effectively improve the operating experience and reduce operator fatigue.

[0020] Compared with related technologies, the single-phase circuit breaker with nickel plating on the bearing surface provided by this utility model has the following beneficial effects: This utility model provides a single-phase circuit breaker with nickel-plated bearing surface. Through the cooperation of the abutment block and pressure spring in the fastening mechanism, the external power line in the gap can be pre-clamped. When wiring, there is no need for the operator to hold the line. The line can be directly inserted into the gap through the through hole to complete the initial fixation. This solves the problem of traditional single-phase circuit breaker wiring that requires holding the line and tightening screws, greatly reducing the difficulty of wiring and improving wiring efficiency. At the same time, the toggle block above the abutment block provides the operator with a clear point of force application, making it easy to push the abutment block to adjust the gap size to insert or remove the line. The friction teeth on its surface can increase the friction during operation and prevent the hand or tool from slipping.

[0021] This utility model provides a single-phase circuit breaker with nickel-plated bearing surface. In the fastening mechanism, the threaded hole is connected to the fastening screw, and the fastening screw abuts against the abutment block. Tightening the fastening screw can adjust the clamping force of the abutment block on the line, which can be adapted to power cords of different specifications. It avoids the problems of poor line contact caused by excessively loose clamping force and damage to the line by excessively tight clamping force, thereby improving the adaptability of the circuit breaker to different lines. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial sectional view of the structure of this utility model from the side. Figure 3 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0023] The following are the labels in the diagram: 1. Circuit breaker body; 201. Movable latch; 202. Fixed latch; 3. Fastening mechanism; 301. Mounting cavity; 302. Through hole; 303. Threaded hole; 304. Fastening screw; 305. Abutment block; 306. Pressure spring; 307. Actuating block; 308. Pressing teeth; 309. Friction teeth; 4. Switch. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings show typical embodiments of this utility model.

[0025] In this embodiment: like Figure 1-3 As shown, the present invention discloses a single-phase circuit breaker with nickel plating on the bearing surface, comprising a circuit breaker body 1, wherein the upper and lower parts of the circuit breaker body 1 are connected to an external power line via fastening mechanisms 3. The fastening mechanism 3 includes a mounting cavity 301 and a through hole 302. An abutment block 305 is movably mounted inside the mounting cavity 301. One side of the abutment block 305 forms a gap for clamping the line. A pressure spring 306 is elastically connected between the other side of the abutment block 305 and the mounting cavity 301. A toggle block 307 is fixedly mounted above the abutment block 305, penetrating the circuit breaker body 1. The abutment block 305 pre-clamps the line in the gap through the elastic force of the pressure spring 306. The abutment block 305, movably mounted inside the mounting cavity 301, in conjunction with the pressure spring 306 elastically connected to it, can pre-clamp the line in the gap through elastic force, allowing for operation... When wiring, operators do not need to continuously hold the line. They only need to insert the external power cord through the through hole 302 into the wire clamping gap on one side of the abutment block 305. The elastic force of the pressure spring 306 will automatically fix the line initially, which greatly reduces the difficulty of wiring operation and improves the convenience of connecting the line to the circuit breaker body 1. Especially in a small installation space, it can significantly reduce the operation steps and improve assembly efficiency. At the same time, the toggle block 307, which passes through the circuit breaker body 1 and is fixed above the abutment block 305, provides the operator with a clear force point for moving the abutment block 305. The operator can easily adjust the position of the abutment block 305 by toggling the toggle block 307, which is convenient for inserting or removing the line.

[0026] like Figure 3 As shown, the mounting cavity 301 and the through hole 302 are connected by a threaded hole 303. A fastening screw 304 is threaded on the inner side of the threaded hole 303, providing reliable structural support for the final stable fixation of the line. The through design of the threaded hole 303 allows the fastening screw 304 to be precisely inserted into the mounting cavity 301 and directly act on the abutment block 305. This avoids the problem of the clamping force not being effectively transmitted due to screw position misalignment in traditional circuit breakers, ensuring that the force of the fastening screw 304 can be accurately applied to the line clamping link. At the same time, the threaded connection has good self-locking properties. After the fastening screw 304 is threadedly connected to the threaded hole 303, it is not easy to loosen due to vibration, temperature changes, or other factors. It can maintain pressure on the abutment block 305 for a long time, thereby ensuring the stability of the line clamping state and reducing the risk of poor line contact caused by screw loosening.

[0027] like Figure 3 As shown, the fastening screw 304 abuts against one side of the abutment block 305, and the fastening screw 304 is threadedly connected to the threaded hole 303. This is used to adjust the clamping force of the abutment block 305 on the line, effectively adapting to the connection requirements of external power cords of different specifications. In practical applications, the conductor diameter and material of external power cords may vary, and the required clamping force will also be different. Too loose a clamping force will lead to poor contact, while too tight a clamping force may damage the conductor. By tightening the fastening screw 304, the clamping force of the abutment block 305 on the line can be precisely adjusted according to the actual line conditions. This ensures reliable contact between the line and the abutment block 305 while avoiding damage to the line due to excessive clamping force, greatly improving the versatility and adaptability of the circuit breaker. At the same time, the design of the direct abutment between the fastening screw 304 and the abutment block 305 ensures the directness and stability of the clamping force transmission, making the adjustment of the clamping force more precise. Operators can judge the clamping status by feel or simple tools, reducing the operating threshold.

[0028] like Figure 3 As shown, the actuating block 307 is the point of force application for the operator to the abutment block 305. The upper surface of the actuating block 307 is provided with friction teeth 309. During wiring operations, the operator can directly apply force to the actuating block 307 to easily push or pull the abutment block 305 within the mounting cavity 301, thereby adjusting the size of the wire clamping gap and facilitating the insertion or removal of external power cables. Especially for personnel with less hand strength or less experience, the clear point of force application can significantly reduce the difficulty of operation and improve wiring efficiency. At the same time, the friction teeth 309 on the upper surface of the actuating block 307 can effectively increase the friction between the operator's hand and the actuating block 307, preventing situations where the operator cannot apply force effectively due to sweaty hands, oil stains, or tool slippage during operation, and preventing the abutment block 305 from moving out of control due to slippage.

[0029] like Figure 3As shown, the actuating block 307 has a pressing tooth 308 on one side of the surface near the gap. The pressing tooth 308 abuts against the external circuit. The tooth-like structure of the pressing tooth 308 can increase the connection strength with the conductor surface of the external circuit. At the same time, the tooth tip can be slightly embedded in the conductor surface, effectively preventing the circuit from loosening or displaced due to vibration, external force pulling or temperature changes during use. This avoids the problem of poor contact caused by the circuit sliding easily in the traditional planar abutment method. At the same time, the pressing tooth 308 cooperates with the pre-clamping function of the abutment block 305. After the elastic force of the pressure spring 306 initially fixes the circuit, the pressing tooth 308 further limits the circuit, ensuring that the circuit will not shift when the clamping force is adjusted by the fastening screw 304. This ensures that the clamping force can be evenly applied to the circuit surface, improving the reliability of clamping.

[0030] like Figure 2 As shown, a fixed locking block 202 is installed on the upper back of the circuit breaker body 1, and a movable locking block 201 is installed on the lower back of the circuit breaker body 1. The circuit breaker body 1 is assembled and installed with the rail mounting plate in the electrical distribution system through the fixed locking block 202 and the movable locking block 201. The fixed locking block 202 can provide stable upper support for the circuit breaker body 1. During installation, the fixed locking block 202 can be inserted into the corresponding slot of the rail mounting plate to achieve the initial positioning of the circuit breaker body 1, which can significantly improve installation efficiency and safety. At the same time, the movable locking block 201 has good flexibility. The operator can adjust the position of the movable locking block 201 according to the thickness of the rail mounting plate, the slot specifications, or the actual installation requirements, so that it can fit tightly with the fixed locking block 202 to clamp the rail mounting plate, thereby improving the adaptability of the circuit breaker.

[0031] like Figure 1 , Figure 2 As shown, a switch 4 is rotatably mounted on the front side of the circuit breaker body 1 via a bearing. The surface of the bearing is nickel-plated. The rotating design of the bearing reduces the friction when the switch 4 rotates, making it easier for operators to switch the circuit on and off. This avoids the problems of switch jamming and strenuous operation in traditional bearingless structures. Especially for scenarios where the switch 4 is frequently operated, this effectively improves the operating experience and reduces operator fatigue. At the same time, the nickel plating on the bearing surface has excellent wear resistance and corrosion resistance. During long-term use, the nickel plating layer can effectively isolate moisture and oxygen in the air, as well as dust and corrosive gases that may be present in the electrical cabinet, preventing the bearing from rusting, oxidizing, or wearing. This avoids the switch 4 failing to rotate normally due to bearing damage, which would affect the circuit breaker's switching function. This ensures that the switch 4 maintains a smooth rotation state for a long time, improving the overall reliability of the circuit breaker.

[0032] In practice, the circuit breaker body 1 is first assembled and fixed to the track mounting plate in the electrical distribution system via the fixed latch 202 and movable latch 201 on the back. Next, the wiring is connected. The operator first applies the actuating block 307 in the fastening mechanism 3, pushing the abutment block 305 to move within the mounting cavity 301 and compressing the pressure spring 306, thus widening the wire clamping gap on one side of the abutment block 305. Then, the external power cable is inserted into this gap through the through hole 302. Subsequently, the actuating block 307 is released, and the pressure spring 306 is released via the elastic band. The moving abutment block 305 resets, pre-clamping the line within the gap, allowing operation without manually holding the line. Finally, the fastening screw 304 is tightened through the threaded hole 303 to abut against the abutment block 305 and adjust the clamping force. At the same time, the abutting teeth 308 on the side of the gap of the moving block 307 will enhance the clamping strength with the line and prevent the line from loosening. In daily use, the circuit on / off control is achieved through the switch 4 with nickel-plated bearing on the front side of the circuit breaker body 1. The nickel-plated bearing can improve the wear resistance and corrosion resistance of the switch 4 during rotation.

[0033] The advantages of this technical solution in practical applications include, but are not limited to, the following: 1. By cooperating with the pressure spring 306 in the fastening mechanism 3, the external power line in the gap can be pre-clamped, and the operator does not need to hold the line when wiring. 2. The toggle block 307 above the abutment block 305 provides the operator with a clear point of force application, making it easy to push the abutment block 305 to adjust the gap size for inserting or removing the line.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single-phase circuit breaker with nickel-plated bearing surface, characterized in that: Includes a circuit breaker body (1), the upper and lower parts of which are connected to an external power line via fastening mechanisms (3); The fastening mechanism (3) includes a mounting cavity (301) and a through hole (302). An abutment block (305) is movably installed inside the mounting cavity (301). A gap for clamping the line is formed on one side of the abutment block (305). A pressure spring (306) is elastically connected between the other side of the abutment block (305) and the mounting cavity (301). A toggle block (307) is fixedly installed above the abutment block (305) through the circuit breaker body (1). The abutment block (305) pre-clamps the line in the gap by the elastic force of the pressure spring (306).

2. A single-phase circuit breaker with nickel plating on the bearing surface according to claim 1, characterized in that, The mounting cavity (301) and the through hole (302) are connected by a threaded hole (303), and a fastening screw (304) is threaded on the inner side of the threaded hole (303).

3. A single-phase circuit breaker with nickel plating on the bearing surface according to claim 2, characterized in that, The fastening screw (304) abuts against one side of the abutment block (305), and the fastening screw (304) is threadedly connected to the threaded hole (303) to adjust the clamping force of the abutment block (305) on the line.

4. A single-phase circuit breaker with nickel plating on the bearing surface according to claim 1, characterized in that, The actuating block (307) is the point where the operator applies force to the abutment block (305), and the upper surface of the actuating block (307) is provided with friction teeth (309).

5. A single-phase circuit breaker with nickel plating on the bearing surface according to claim 1, characterized in that, The actuating block (307) has a pressing tooth (308) on one side surface near the gap, and the pressing tooth (308) abuts against the external line.

6. A single-phase circuit breaker with nickel plating on the bearing surface according to claim 1, characterized in that, A fixed clip (202) is installed on the upper back of the circuit breaker body (1), and a movable clip (201) is installed on the lower back of the circuit breaker body (1). The circuit breaker body (1) is assembled and installed with the rail mounting plate in the electrical distribution through the fixed clip (202) and the movable clip (201).

7. A single-phase circuit breaker with nickel plating on the bearing surface according to claim 1, characterized in that, The circuit breaker body (1) has a switch (4) mounted on its front side via a bearing, and the surface of the bearing is nickel-plated.

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