A circuit breaker
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG AOELEC ELECTRICAL CO LTD
- Filing Date
- 2023-03-31
- Publication Date
- 2026-06-30
Smart Images
Figure CN116344275B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a circuit breaker. Background Technology
[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and close, carry, and interrupt current under abnormal circuit conditions within a specified time. It can quickly cut off the power supply to prevent electric shock accidents.
[0003] The CN108109886A circuit breaker, with its moving contact operating mechanism, has a relatively thick casing due to the combined thickness of the latch, moving contact mounting base, and connecting plate. Existing residual current circuit breakers (RCCBs) have an N-pole power supply section and an N-pole circuit board, which are typically always connected. When the circuit is disconnected, if the user reverses the power supply, the N-pole circuit board remains energized, increasing its power consumption and posing a risk of burnout. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the prior art by providing a circuit breaker that is small in size and whose N-pole circuit board is not easily burned out.
[0005] The technical solution of this invention: A circuit breaker includes a circuit breaker housing, a moving contact operating mechanism, and a N-pole power supply structure. The moving contact operating mechanism includes a latch, a moving contact seat, and a moving contact. Both the latch and the moving contact are rotatably mounted on the moving contact seat. The moving contact and the moving contact seat are linked by a torsion spring. The moving contact or the moving contact seat has a torsion spring mounting protrusion on its side. The torsion spring is mounted on the torsion spring mounting protrusion, and its two torsion arms respectively abut against the moving contact seat and the moving contact. A mounting bracket is inserted through the moving contact seat. The mounting shaft is mounted on the circuit breaker housing at both ends. The moving contact has a first positioning hole. The torsion spring mounting protrusion is integrally formed on the outer ring of the first positioning hole of the moving contact. A first protrusion is integrally provided on one side of the moving contact seat. The first protrusion is located between the inner ring of the first positioning hole and the mounting shaft. A first groove is formed between the inner ring of the torsion spring mounting protrusion on the moving contact and the mounting shaft. A first mounting boss is provided on an inner wall of the circuit breaker housing for the first end of the mounting shaft to be inserted. The end of the first mounting boss is also inserted into the first groove.
[0006] The N-pole power-taking structure includes an N-pole power-taking section, a push rod, and a power-taking spring. The push rod is guided and slidably disposed within the housing and located above the N-pole power-taking section. The first pushing end of the push rod is correspondingly disposed with the moving contact seat. The power-taking spring includes a positioning part, a movable part, and a welding part. A positioning boss for the power-taking spring is provided within the housing. The positioning part of the power-taking spring is sleeved on the positioning boss. In the initial state, the movable part of the power-taking spring abuts against the N-pole power-taking section, and the movable part of the power-taking spring corresponds to the second pushing end of the push rod. The circuit breaker is configured such that the welded part of the power-taking spring abuts against the inner wall of the housing and is electrically connected to the N-pole circuit board. After the circuit breaker is tripped, the moving contact seat pushes the push rod to move, and the second pushing end of the push rod presses against the movable part of the power-taking spring, separating the movable part of the power-taking spring from the N-pole power-taking part. After the circuit breaker is closed, the moving contact seat removes the pushing force on the push rod, the movable part of the power-taking spring returns to its original deformation, and the push rod moves under the elastic force of the movable part of the power-taking spring, so that the movable part of the power-taking spring contacts the N-pole power-taking part.
[0007] Preferably, the spring is in the shape of a sheet, and the lower end face of the positioning part of the spring abuts against the positioning boss of the spring.
[0008] By adopting the above scheme, the installation method has multiple safety features. It allows for convenient installation of the moving contact seat on the circuit breaker housing. The large contact area between the first protrusion, the first mounting boss, and the mounting shaft makes it less prone to breakage. It increases the strength of the housing in positioning the mechanism within a small size, effectively positioning the moving contact. The mechanism is rationally installed, ensuring reliable operation within a small space. This avoids the problem of some products on the market failing due to insecure positioning of the mechanism caused by insufficient shaft-housing fit dimensions, leading to changes in the force point of the mechanism. Furthermore, installation is very convenient. On the other hand, the first protrusion separates the moving contact from the metal mounting shaft, preventing electrical conductivity. The first mounting boss, when inserted into the moving contact, effectively prevents sparks generated by the torsion spring from entering the mounting shaft because sparks cannot bend.
[0009] The positioning part of the spring abuts against the positioning boss, restricting its movement. The welded part of the spring abuts against the inner wall of the housing, ensuring proper positioning and easy installation. The push rod guide slides above the N-pole power take-up section, fully utilizing the installation space above it. The push rod cannot move up or down. After the circuit breaker trips, the moving contact seat rotates to the tripped position, pushing the push rod. The second pushing end of the push rod presses against the movable part of the spring, thus controlling its movement. The circuit breaker is separated from the N-pole power take-off section, thus disconnecting the N-pole power take-off section and the N-pole circuit board. This ensures that the N-pole circuit board is not energized when the circuit breaker is open, guaranteeing reliable operation of the N-pole circuit board and saving power consumption and energy. After the circuit breaker is closed, the moving contact seat rotates to the closed position, removing the pushing force on the push rod. The moving part of the power take-off spring returns to its original deformation, and the push rod moves under the elastic force of the moving part of the power take-off spring. The moving part of the power take-off spring contacts the N-pole power take-off section, making the N-pole power take-off section and the N-pole circuit board conductive.
[0010] A further feature of the present invention is that the first mounting boss also has a torsion spring abutment, wherein the torsion spring abuts between the moving contact and the torsion spring abutment, and the outer periphery of the torsion spring abutment has a spring ring abutment surface, wherein the abutment surface is a conical surface.
[0011] By adopting the above solution and using a conical abutment surface, there is no need for excessively high fitting precision between it and the torsion spring. This makes it easy to abut torsion springs of different specifications, and it has strong versatility. It can also prevent the torsion spring from shaking or detaching from the mounting protrusion during use.
[0012] A further feature of the present invention is that the moving contact seat has a retaining edge on the side on which the latch is mounted. The retaining edge and the corresponding side wall of the latch cooperate to form a mounting groove. A latch spring for resetting the latch is installed in the mounting groove, and the two ends of the latch spring abut against the moving contact seat and the latch, respectively.
[0013] By adopting the above solution, the locking spring and the locking buckle are mounted together on one side of the moving contact seat, avoiding their overlapping, thereby reducing the size of the mechanism. The mechanism can operate reliably in a smaller space, making full use of the space. The mounting groove is directly formed on the other side of the moving contact seat located on the locking buckle, which is simple to form and reasonable in design.
[0014] A further embodiment of the present invention: the circuit breaker housing has a base and a cover, a first mounting boss is located on the inner wall of the base, a second protrusion is integrally provided on the other side of the moving contact seat, a second positioning hole is provided on the latch, the latch is sleeved on the second protrusion, a second groove is formed between the inner ring of the second positioning hole on the latch and the mounting shaft, a second mounting boss is provided on the inner side wall of the cover, the second mounting boss is for the second end of the mounting shaft to be inserted, and the end of the second mounting boss is also inserted into the second groove.
[0015] By adopting the above scheme, the moving contact seat can be easily installed on the circuit breaker housing. The above installation method has multiple safety features. The second mounting boss is inserted into the second slot, and the contact area between the second protrusion, the second mounting boss and the mounting shaft is large, making it less prone to breakage. It increases the strength of the housing for positioning the mechanism in a small volume, and also effectively positions the latch. The mechanism is installed reasonably, enabling the mechanism to operate reliably in a small space. This avoids the problem of some products on the market failing due to the small fit between the shaft and the housing, which can cause changes in the force point of the product mechanism and lead to product failure during use. In addition, the installation is also very convenient.
[0016] A further feature of the invention includes a handle and a trip unit. A locking rod is provided between the handle and the moving contact seat. The moving contact seat has a sliding groove, which includes a curved portion and a straight portion. The first end of the locking rod is connected to the handle, and the second end is placed in the sliding groove. A pressing arm is provided on the locking latch. After the circuit breaker is disconnected, the pressing arm cooperates with the curved portion of the sliding groove to lock the second end of the locking rod. At this time, the handle can be pushed to close the circuit breaker. After the circuit breaker is closed, the circuit breaker's trip unit actuates the locking latch, causing the latch to rotate, and the pressing arm loses its restraint on the locking rod. The second end is locked, at which point the second end of the locking rod slides into the straight part of the sliding groove and the moving contact seat rotates to open the circuit breaker; the outer side of the locking rod engagement surface on the pressure arm is provided with an inclined guide surface that allows the second end of the locking rod to slide into the curved part of the sliding groove; a lever arm is provided on the latch below the pressure arm, and the pressure arm and the lever arm are forked to form a fork, the width of which is greater than the diameter of the second end of the locking rod; when the circuit breaker is opened, the locking rod actuating surface on the lever arm can actuate the second end of the locking rod to make the second end of the locking rod slide into the straight part of the sliding groove.
[0017] By adopting the above scheme, the stability of the circuit breaker operation can be well guaranteed. The setting of the curved and straight parts of the slide groove ensures that the locking rod can be controlled during the operation of the handle. This ensures normal closing of the circuit breaker and quick release of the latch after closing. The inclined guide surface ensures that the second end of the locking rod can smoothly return to the curved part after release for subsequent operations. In practice, the inclined guide surface can be omitted, and only an arc transition surface at the end is required, as long as it allows the second end of the locking rod to enter the curved part. The width of the fork ensures smooth opening. The function of the lever arm is to move the second end of the locking rod in case the locking rod gets stuck during opening, ensuring smooth opening and preventing dangerous situations.
[0018] A further feature of the present invention is that both the first pushing end and the second pushing end of the push rod are provided with arc surfaces, and the upper end of the moving contact seat is provided with a contact surface, and the arc surface of the first pushing end of the push rod can press against the contact surface of the moving contact seat.
[0019] By adopting the above scheme, the arc-shaped surface of the first pushing end abuts against the contact surface of the moving contact seat, and the arc-shaped surface of the second pushing end abuts against the end face of the moving part of the power-taking spring, thereby reducing friction and improving flexibility during pushing.
[0020] A further provision of the present invention: the housing has a power take-up spring limiting boss located above the welding part of the power take-up spring, and the upper end surface of the welding part of the power take-up spring abuts against the power take-up spring limiting boss.
[0021] By adopting the above solution, the limiting boss of the power take-up spring effectively supports the upper end face of the welded part of the power take-up spring, preventing the welded part of the power take-up spring from moving upward.
[0022] A further feature of the present invention is that push rod limiting bosses are provided at intervals on the upper and lower sides of the housing, and the push rod limiting bosses on the upper and lower sides form an active space for the push rod to slide. A stop surface is also provided on the push rod. When the movable part of the electric spring pushes the push rod to reset, the stop surface abuts against the end of the push rod limiting boss.
[0023] By adopting the above scheme, the push rod can slide along the guide space to avoid the push rod moving up and down. After the moving contact seat rotates to the closed position, the moving part of the take-up spring pushes the push rod back to its original position. The stop surface abuts against the end of the push rod limiting boss, which can limit the movement distance of the push rod.
[0024] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description
[0025] Figure 1 This is a structural diagram of a circuit breaker according to a specific embodiment of the present invention;
[0026] Figure 2 This is a circuit breaker closed state diagram according to a specific embodiment of the present invention;
[0027] Figure 3 This is a circuit breaker disconnection state diagram according to a specific embodiment of the present invention;
[0028] Figure 4 This is a diagram showing the circuit breaker in a state of about to trip, according to a specific embodiment of the present invention.
[0029] Figure 5 This is a side view of the N-pole power extraction structure in the closed state of a specific embodiment of the present invention;
[0030] Figure 6 This is a side view of the N-pole power extraction structure in the open state of the circuit breaker according to a specific embodiment of the present invention;
[0031] Figure 7 This is a schematic diagram of the electric spring structure in a specific embodiment of the present invention;
[0032] Figure 8This is a schematic diagram of the push rod structure according to a specific embodiment of the present invention;
[0033] Figure 9 This is a schematic diagram of the assembly structure of the N-pole power extraction part and the housing in a specific embodiment of the present invention.
[0034] Figure 10 This is a structural diagram of one side of the moving contact of the moving contact operating mechanism according to a specific embodiment of the present invention;
[0035] Figure 11 This is a structural diagram of the locking side of the moving contact operating mechanism according to a specific embodiment of the present invention;
[0036] Figure 12 This is a structural diagram of the side of the moving contact seat where the moving contact piece is installed, according to a specific embodiment of the present invention;
[0037] Figure 13 This is a structural diagram of the side of the moving contact seat equipped with the locking buckle according to a specific embodiment of the present invention;
[0038] Figure 14 This is a structural diagram of the moving contact in a specific embodiment of the present invention;
[0039] Figure 15 This is a structural diagram of the latch according to a specific embodiment of the present invention;
[0040] Figure 16 This is a structural diagram of the latch according to a specific embodiment of the present invention;
[0041] Figure 17 This is a structural diagram of the base according to a specific embodiment of the present invention;
[0042] Figure 18 This is a structural diagram of the shell cover according to a specific embodiment of the present invention;
[0043] Figure 19 This is an internal installation structure diagram of a specific embodiment of the present invention.
[0044] In the diagram: Circuit breaker housing A, moving contact operating mechanism B, N-pole power supply structure C, latch 1, moving contact seat 2, moving contact 3, torsion spring 4, torsion spring mounting protrusion 5, latch spring 6, stop 21, mounting groove 7, mounting shaft 8, circuit breaker housing A, first positioning hole 31, first protrusion 22, first slot 91, first mounting boss A11, torsion spring abutment A12, spring coil abutment surface A121, torsion spring abutment block A13, base A1, housing cover A2, second protrusion 23, second positioning hole 1 0, Second groove 92, Second mounting boss A21, Limiting groove 24, First limiting surface 241, Second limiting surface 242, Positioning piece 32, Handle 11, Release device 12, Locking rod 13, Slide groove 25, Bending part 251, Straight part 252, Pressing arm 1a, Locking rod engagement surface 1a1, Guide surface 1a11, Paddle arm 1b, Locking rod actuating surface 1b1, Fork 1c, Linkage shaft movable groove 18, Linkage shaft placement hole 19, Linkage shaft 20, Spring positioning block 28, Spring insert block 16;
[0045] N-pole power take-off part C1, push rod C2, first push end C21, second push end C22, power take-off spring C3, positioning part C31, movable part C32, welding part C33, power take-off spring positioning boss A3, power take-off spring limiting boss A4, push rod limiting boss A5, stop surface C23. Detailed Implementation
[0046] The technical solutions in this embodiment 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.
[0047] like Figure 1-19As shown, a circuit breaker of the present invention includes a circuit breaker housing A, a moving contact operating mechanism B, and a N-pole power supply structure C. The moving contact operating mechanism B includes a latch 1, a moving contact seat 2, and a moving contact 3. Both the latch 1 and the moving contact 3 are rotatably mounted on the moving contact seat 2. The moving contact 3 and the moving contact seat 2 are linked together by a torsion spring 4. The moving contact 3 or the moving contact seat 2 has a torsion spring mounting protrusion 5 on its side. The torsion spring 4 is mounted on the torsion spring mounting protrusion 5, and its two torsion arms respectively abut against the moving contact seat 2 and the moving contact 3. The moving contact seat 2 is also provided with a latch spring 6 for resetting the latch 1. The latch spring 6 and the latch 1 are mounted together on the moving contact seat 2. On the same side of seat 2, and at both ends of the locking spring 6, it abuts against the moving contact seat 2 and the locking buckle 1 respectively; the moving contact seat 2 also has a retaining edge 21 on the side where the locking buckle 1 is installed. The retaining edge 21 cooperates with the corresponding side wall of the locking buckle 1 to form a mounting groove 7. The locking spring 6 is installed in the mounting groove 7. The moving contact seat 2 has a spring positioning block 28 on one end of the mounting groove 7. The locking buckle 1 has a spring insert block 16 on the other end of the mounting groove 7. The spring positioning block 2 positions the locking spring, and the spring positioning block 28 limits the locking spring 6 to prevent the spring 6 from rubbing against other parts. After the other end of the locking spring 6 is locked on the spring insert block 16, it abuts against the locking buckle abutting edge. By adopting the above scheme, the locking spring 6 and the locking buckle 1 are mounted together on one side of the moving contact seat 2 to avoid overlapping, thereby reducing the size of the mechanism. The mechanism can operate reliably in a smaller space, making full use of the space. Furthermore, the mounting groove 7 is directly formed on the other side of the moving contact seat 2 located on the locking buckle 1, which is simple to form and reasonable in design.
[0048] In this embodiment of the invention, a mounting shaft 8 is provided in the moving contact seat 2, and both ends of the mounting shaft 8 are mounted on the circuit breaker housing A. The moving contact 3 has a first positioning hole 31. The torsion spring mounting protrusion 5 is integrally formed on the outer ring of the first positioning hole 31 of the moving contact 3. A first protrusion 22 is integrally provided on one side of the moving contact seat 2. The first protrusion 22 is located between the inner ring of the first positioning hole 31 and the mounting shaft 8. A first groove 91 is formed between the inner ring of the torsion spring mounting protrusion 5 on the moving contact 3 and the mounting shaft 8. A first mounting boss A11 is provided on an inner wall of the circuit breaker housing A for the first end of the mounting shaft 8 to be inserted. The end of the first mounting boss A11 is also inserted into the first groove 91. By adopting the above scheme, on the one hand, the moving contact seat 2 can be easily installed on the circuit breaker housing A. The above installation method has multiple safety features. The contact area between the first protrusion 22, the first mounting boss A11 and the mounting shaft 8 is large, making it less prone to breakage. It increases the strength of the mechanism positioning on the housing A in a small volume, and effectively positions the moving contact 3. The mechanism installation is reasonable, and the mechanism can operate reliably in a small space. It can avoid the product failure caused by the small fit between the shaft and the housing, which leads to changes in the force point of the product mechanism during use due to the unstable positioning of the product mechanism. In addition, the installation is also very convenient. On the other hand, the first protrusion 22 separates the moving contact 3 from the metal mounting shaft 8 to prevent conductivity. The first mounting boss A11 is inserted into the moving contact 3. Since the spark cannot bend, it can effectively prevent the spark generated by the torsion spring 4 from turning into the mounting shaft 8.
[0049] In this embodiment of the invention, the first mounting boss A11 also has a torsion spring abutment A12. The torsion spring 4 abuts against the moving contact 3 and the torsion spring abutment A12. The outer periphery of the torsion spring abutment A12 has a spring coil abutment surface A121, which is a conical surface. By adopting the above solution and using the conical abutment surface A121, there is no need for excessively high fitting precision between it and the torsion spring 4, which facilitates its abutment against torsion springs 4 of different specifications. It has strong versatility and can prevent the torsion spring 4 from shaking or detaching from the mounting boss 5 during use.
[0050] In this embodiment of the invention, the circuit breaker housing A also has a plurality of torsion spring abutments A13 on its inner wall having a first mounting boss A11, which can abut against the side of the torsion spring 4 coil. By adopting the above solution, it is convenient to abut the torsion spring 4, preventing it from shaking or detaching from the mounting boss 5 during use.
[0051] In this embodiment of the invention, the circuit breaker housing A has a base A1 and a cover A2. A first mounting boss A11 is located on the inner wall of the base A1. A second protrusion 23 is integrally provided on the other side of the moving contact seat 2. The latch 1 has a second positioning hole 10. The latch 1 is sleeved on the second protrusion 23. A second groove 92 is formed between the inner ring of the second positioning hole 10 on the latch 1 and the mounting shaft 8. A second mounting boss A21 is provided on the inner side wall of the cover A2. The second mounting boss A21 is used for the second end of the mounting shaft 8 to be inserted. The end of the second mounting boss A21 is also inserted into the second groove 92. The inner wall of the base A1 also has a contact abutment that abuts against one side of the moving contact 3. By adopting the above scheme, the moving contact seat 2 can be easily installed on the circuit breaker housing A. The above installation method has multiple safety features. The second mounting boss 23 is inserted into the second slot 92. The contact area between the second protrusion 23, the second mounting boss A21 and the mounting shaft 8 is large, making it less prone to breakage. In a small volume, it increases the strength of the housing for positioning the mechanism and effectively positions the latch 1. The mechanism is installed reasonably, enabling reliable operation of the mechanism in a small space. This avoids the problem of some products on the market failing due to the small fit between the shaft and the housing, which causes changes in the force point of the product mechanism during use. In addition, the installation is also very convenient.
[0052] In this embodiment of the invention, the moving contact seat 2 has a limiting groove 24 on one side corresponding to the moving contact. The limiting groove 24 has a first limiting surface 241 and a second limiting surface 242. The moving contact 3 has a positioning piece 32 extending into the limiting groove 24. The positioning piece 32 abuts against the first limiting surface 241 or the second limiting surface 242 to limit the rotation angle of the moving contact 3. It also includes a handle 11 and a trip unit 12. The trip unit 12 is a conventional technical means. A locking rod 13 is provided between the handle 11 and the moving contact seat 2. The moving contact seat 2 is provided with a sliding groove 25. The sliding groove 25 includes a curved part 251 and a straight part 252. The first end of the locking rod 13 is connected to the handle 11, and the second end is placed in the sliding groove 25. The latch 1 is provided with a pressing arm 1a. After the circuit breaker is disconnected, the pressing arm 1a cooperates with the curved part 251 of the sliding groove 25 to lock the second end of the locking rod 13. The circuit breaker is locked at the end, and the handle can be pushed to close the circuit breaker. After the circuit breaker is closed, the trip unit 12 of the circuit breaker actuates the latch 1, causing the latch 1 to rotate. The pressure arm 1a loses its lock on the second end of the locking rod 13. At this time, the second end of the locking rod 13 slides into the straight part 252 of the slide groove 25, and the moving contact seat 2 rotates to open the circuit breaker. The locking rod engagement surface 1a1 on the pressure arm 1a has an inclined guide surface 1a11 on the outside of which the second end of the locking rod 13 can slide into the curved part 251 of the slide groove. The latch 1 is provided with a lever arm 1b below the pressure arm 1a. The pressure arm 1a and the lever arm 1b are forked to form a fork 1c. The width of the fork 1c is greater than the diameter of the second end of the locking rod 13. When the circuit breaker is opened, the locking rod lever actuating surface 1b1 on the lever arm 1b can actuate the second end of the locking rod 13 to make the second end of the locking rod 13 slide into the straight part 252 of the slide groove.By adopting the above scheme, the stability of the circuit breaker operation can be well guaranteed. The curved portion 251 and the straight portion 252 of the slide groove ensure that the handle 11 can control the locking rod 13 during operation. This guarantees normal circuit breaker closing and rapid disengagement of the latch 1 after closing. In use, pushing the handle 11 causes the locking rod 13 to engage with the locking rod 13 under the action of the latch 1. With the push of the handle 11, the mechanism rotates clockwise until it reaches the closed position. In case of overload, short circuit, or leakage, the latch 1 rotates counterclockwise under the action of the double-metal pull rod core, separating the locking rod 13 from the locking rod engagement surface 1a1 of the latch 1, and the locking rod 13 moves outward from the slide groove 25. If the product ages and fails at this time, the locking lever actuating surface 1b1 will pull the locking lever 13, thereby unlocking the mechanism and returning it to its original position. The handle 11 and the latch 1 will return to their original positions under the action of the handle spring and the latch spring 6, respectively. The inclined guide surface 1a11 ensures that the second end of the locking lever 13 can smoothly return to the bent part 251 after the latch is released for subsequent operations. In fact, the inclined guide surface 1a11 can be omitted, and only an arc-shaped transition surface can be provided at the end, as long as the second end of the locking lever 13 can enter the bent part 251. The width of the fork 1c ensures smooth opening. The function of the lever arm 1b is to actuate the second end of the locking lever 13 if it gets stuck during opening, ensuring smooth opening and preventing dangerous situations. The structure and principle of the handle-driven contact operating mechanism are consistent with the driving structure in the applicant's previously submitted patents CN112530757A and CN112530752A, so they will not be described in detail.
[0053] In this embodiment of the invention, the circuit breaker is a multi-stage circuit breaker. The latches 1 of two adjacent moving contact operating mechanisms achieve multi-stage linkage through the linkage shaft 20. The latches 1 have linkage shaft slots 18 and linkage shaft placement holes 19 on both sides for the linkage shaft 20 to be inserted. By adopting the above scheme, multi-stage linkage is achieved by inserting the linkage shaft 20 into the linkage shaft placement hole 19 and the other end of the linkage shaft 20 into the linkage shaft slot 18. The holes and slots help increase the creepage distance between the linkage shaft 20 and other live parts and reduce the risk of voltage breakdown.
[0054] In this embodiment of the invention, the N-pole power-taking structure C includes an N-pole power-taking part C1, a push rod C2, and a power-taking spring C3. The push rod C2 is guided and slidably disposed inside the housing A and located above the N-pole power-taking part C1. The first pushing end C21 of the push rod C2 is correspondingly disposed with the moving contact seat 2. The power-taking spring C3 includes a positioning part C31, a movable part C32, and a welding part C33. A power-taking spring positioning boss A3 is provided inside the housing A. The positioning part C31 of the power-taking spring C3 is sleeved on the power-taking spring positioning boss A3. The movable part C32 of the power-taking spring abuts against the N-pole power-taking part C1 in the initial state. The movable part C32 of the power-taking spring is correspondingly disposed with the second pushing end C22 of the push rod C2. The welding part of the power-taking spring... The connecting part C33 abuts against the inner wall of the housing A. The welding part C33 of the power take-up spring is electrically connected to the N-pole circuit board. After the circuit breaker is opened, the moving contact seat 2 pushes the push rod C2 to move. The second pushing end C22 of the push rod C2 presses against the movable part C32 of the power take-up spring, so that the movable part C32 of the power take-up spring is separated from the N-pole power take-up part C1. After the circuit breaker is closed, the moving contact seat 2 removes the pushing force on the push rod C2. The movable part C32 of the power take-up spring returns to its original deformation. The push rod C2 moves under the elastic force of the movable part C32 of the power take-up spring, so that the movable part C32 of the power take-up spring contacts the N-pole power take-up part C1. The power take-up spring C3 is in the shape of a sheet. The lower end face of the positioning part C31 of the power take-up spring abuts against the positioning boss A3 of the power take-up spring. By adopting the above scheme, the positioning part C31 of the spring abuts against the positioning boss A3 of the spring, restricting the movement of the positioning part C31. The welding part C33 of the spring abuts against the inner wall of the housing A, thereby ensuring the positioning and installation of the spring. The spring C3 is easy to install. The push rod C2 slides above the N-pole power take-up part C1, making full use of the installation space above the N-pole power take-up part C1. The push rod C2 cannot move up and down. After the circuit breaker is disconnected, the moving contact seat 2 rotates to the disconnected position, thereby pushing the push rod C2 to move. The second pushing end C22 of the push rod abuts against the movable part C32 of the spring. The movable part C32 of the spring is separated from the N-pole power take-up part C1, thus disconnecting the N-pole power take-up part C1 from the N-pole circuit board. This ensures that the N-pole circuit board is not energized when the circuit breaker is open, guaranteeing reliable operation of the N-pole circuit board and saving power consumption of the circuit board. After the circuit breaker is closed, the moving contact seat 2 rotates to the closed position, removing the pushing force on the push rod C2. The movable part C32 of the spring returns to its original deformation, and the push rod C2 moves under the elastic force of the movable part C32 of the spring. The movable part C32 of the spring contacts the N-pole power take-up part C1, making the N-pole power take-up part C1 and the N-pole circuit board conductive.
[0055] In this embodiment of the invention, both the first pushing end C21 and the second pushing end C22 of the push rod C2 are provided with an arc surface C23, and the upper end of the moving contact seat 2 is provided with an abutting surface. The arc surface C23 of the first pushing end of the push rod C2 can press against the abutting surface of the moving contact seat. By adopting the above solution, the arc surface of the first pushing end C21 abuts against the abutting surface of the moving contact seat 2, and the arc surface of the second pushing end C22 abuts against the end face of the movable part C23 of the power-taking spring, thereby reducing friction and improving flexibility during pushing.
[0056] In this embodiment of the invention, the housing A is provided with a power-taking spring limiting boss A4 above the welded portion (C33) of the power-taking spring, and the upper end face of the welded portion (C33) of the power-taking spring abuts against the power-taking spring limiting boss A4. By adopting the above solution, the power-taking spring limiting boss A4 effectively supports the upper end face of the welded portion (C33) of the power-taking spring, preventing the welded portion (C33) of the power-taking spring from moving upward.
[0057] In this embodiment of the invention, push rod limiting bosses A5 are provided vertically spaced within the housing A. The push rod limiting bosses A5 on the upper and lower sides form an active space for the push rod C2 to slide smoothly. A stop surface C23 is also provided on the push rod C2. When the movable part C32 of the spring pushes the push rod C2 to its reset position, the stop surface C23 abuts against the end of the push rod limiting bosses A5. By adopting the above scheme, the push rod C2 can slide smoothly along the active space, preventing it from moving up and down. After the moving contact seat 2 rotates to the closed position, the movable part C32 of the spring pushes the push rod C2 back to its original position, and the stop surface C23 abuts against the end of the push rod limiting bosses A5, thus limiting the movement distance of the push rod C2.
[0058] It should be noted that in the description of this invention, all directional indications (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0059] Furthermore, in this invention, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0060] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
Claims
1. A circuit breaker, comprising a circuit breaker housing (A), a moving contact operating mechanism (B), and a N-pole power supply structure (C), wherein the moving contact operating mechanism (B) comprises a latch (1), a moving contact seat (2), and a moving contact (3), the latch (1) and the moving contact (3) being rotatably mounted on the moving contact seat (2), the moving contact (3) and the moving contact seat (2) being linked by a torsion spring (4), the moving contact (3) or the moving contact seat (2) having a torsion spring mounting protrusion (5) on its side, the torsion spring (4) being mounted on the torsion spring mounting protrusion (5), and its two torsion arms respectively abutting against the moving contact seat (2) and the moving contact (3), and a mounting shaft (8) passing through the moving contact seat (2), the mounting shaft (8) being... The two ends of the moving contact (3) are mounted on the circuit breaker housing (A). The moving contact (3) has a first positioning hole (31). The torsion spring mounting protrusion (5) is integrally formed on the outer ring of the first positioning hole (31) of the moving contact (3). The moving contact seat (2) is integrally provided with a first protrusion (22) on one side. The first protrusion (22) is located between the inner ring of the first positioning hole (31) and the mounting shaft (8). The inner ring of the torsion spring mounting protrusion (5) on the moving contact (3) and the mounting shaft (8) form a first groove (91). The inner wall of the circuit breaker housing (A) has a first mounting boss (A11) for the first end of the mounting shaft (8) to be inserted. The end of the first mounting boss (A11) is also inserted into the first groove (91). The N-pole power-taking structure (C) includes an N-pole power-taking part (C1), a push rod (C2), and a power-taking spring (C3). The push rod (C2) is slidably disposed inside the housing (A) and located above the N-pole power-taking part (C1). The first pushing end (C21) of the push rod (C2) is correspondingly disposed with the moving contact seat (2). The power-taking spring (C3) includes a positioning part (C31), a movable part (C32), and a welding part (C33). A power-taking spring positioning boss (A3) is provided inside the housing (A). The positioning part (C31) of the power-taking spring (C3) is sleeved on the power-taking spring positioning boss (A3). The movable part (C32) of the power-taking spring abuts against the N-pole power-taking part (C1) in the initial state. The movable part (C32) of the power-taking spring and the push rod (C2) are connected. The second push end (C22) is correspondingly provided, and the welded part (C33) of the power take-up spring abuts against the inner wall of the housing (A). The welded part (C33) of the power take-up spring is electrically connected to the N-pole circuit board. After the circuit breaker is opened, the moving contact seat (2) pushes the push rod (C2) to move. The second push end (C22) of the push rod (C2) presses against the movable part (C32) of the power take-up spring, so that the movable part (C32) of the power take-up spring is separated from the N-pole power take-up part (C1). After the circuit breaker is closed, the moving contact seat (2) removes the pushing force on the push rod (C2), the movable part (C32) of the power take-up spring returns to its original deformation, and the push rod (C2) moves under the elastic force of the movable part (C32) of the power take-up spring, so that the movable part (C32) of the power take-up spring contacts the N-pole power take-up part (C1).
2. The circuit breaker according to claim 1, characterized in that: The first mounting boss (A11) also has a torsion spring abutment (A12), the torsion spring (4) abuts between the moving contact (3) and the torsion spring abutment (A12), and the outer periphery of the torsion spring abutment (A12) has a spring ring abutment surface (A121), the abutment surface (A121) is a conical surface.
3. The circuit breaker according to claim 1, characterized in that: The moving contact seat (2) also has a retaining edge (21) on the side where the latch (1) is installed. The retaining edge (21) and the corresponding side wall of the latch (1) cooperate to form a mounting groove (7). A latch spring (6) for resetting the latch (1) is installed in the mounting groove (7), and the two ends of the latch spring (6) abut against the moving contact seat (2) and the latch (1) respectively.
4. The circuit breaker according to claim 1, 2, or 3, characterized in that: The circuit breaker housing (A) has a base (A1) and a cover (A2). A first mounting boss (A11) is located on the inner wall of the base (A1). A second protrusion is integrally provided on the other side of the moving contact seat (2). A second positioning hole (10) is provided on the latch (1). The latch (1) is sleeved on the second protrusion. A second groove (92) is formed between the inner ring of the second positioning hole (10) on the latch (1) and the mounting shaft (8). A second mounting boss (A21) is provided on the inner side wall of the cover (A2). The second mounting boss (A21) is used for the second end of the mounting shaft (8) to be inserted. The end of the second mounting boss (A21) is also inserted into the second groove (92).
5. The circuit breaker according to claim 1, 2, or 3, characterized in that: It also includes a handle (11) and a trip unit (12). A locking rod (13) is provided between the handle (11) and the moving contact seat (2). A sliding groove (25) is provided on the moving contact seat (2). The sliding groove (25) includes a curved part (251) and a straight part (252). The first end of the locking rod (13) is connected to the handle (11), and the second end is placed in the sliding groove (25). A pressing arm (1a) is provided on the latch (1). After the circuit breaker is disconnected, the pressing arm (1a) cooperates with the curved part (251) of the sliding groove (25) to lock the second end of the locking rod (13). At this time, the handle can be pushed to close the circuit breaker. After the circuit breaker is closed, the trip unit (12) of the circuit breaker actuates the latch (1) to make the latch (1) rotate, and the pressing arm (1a) loses its lock on the second end of the locking rod (13). When the second end of the locking rod (13) slides into the straight part (252) of the slide groove (25), the moving contact seat (2) rotates to realize the circuit breaker disconnection; the locking rod biting surface (1a1) on the pressure arm (1a) has an inclined guide surface (1a11) on the outside of which the second end of the locking rod (13) can slide into the curved part (251) of the slide groove. The latch (1) is provided with a lever arm (1b) below the pressure arm (1a). The pressure arm (1a) and the lever arm (1b) are forked to form a fork (1c). The width of the fork (1c) is greater than the diameter of the second end of the locking rod (13). When the circuit breaker is tripped, the locking rod lever moving surface (1b1) on the lever arm (1b) can move the second end of the locking rod (13) to make the second end of the locking rod (13) slide into the straight part (252) of the slide groove.
6. The circuit breaker according to claim 1, 2, or 3, characterized in that: Both the first pushing end (C21) and the second pushing end (C22) of the push rod (C2) are provided with arc surfaces, and the upper end of the moving contact seat (2) is provided with a contact surface. The arc surface of the first pushing end of the push rod (C2) can press against the contact surface of the moving contact seat.
7. The circuit breaker according to claim 1, 2, or 3, characterized in that: The spring for taking off the power (C3) is in the shape of a sheet, and the lower end face of the positioning part (C31) of the spring for taking off the power abuts against the positioning boss (A3) of the spring for taking off the power.
8. A circuit breaker according to claim 1, 2, or 3, characterized in that: The housing (A) has a power take-up spring limiting boss (A4) above the welded part (C33) of the power take-up spring, and the upper end face of the welded part (C33) of the power take-up spring abuts against the power take-up spring limiting boss (A4).
9. A circuit breaker according to claim 1, 2, or 3, characterized in that: The housing (A) is provided with push rod limiting bosses (A5) spaced vertically. The push rod limiting bosses (A5) on the upper and lower sides form an active space for the push rod (C2) to slide. The push rod (C2) is also provided with a stop surface (C23). When the movable part (C32) of the power take-off spring pushes the push rod (C2) to reset, the stop surface (C23) abuts against the end of the push rod limiting boss (A5).