A circuit breaker

Abstract

The application relates to the technical field of low-voltage electrical apparatuses, in particular to a circuit breaker which comprises a shell, a partition, a circuit breaker N pole, a circuit breaker L1 pole, a connecting shaft and a test button assembly, the circuit breaker N pole is arranged in a first mounting cavity, the circuit breaker N pole comprises an N pole operating mechanism, the N pole operating mechanism comprises an N pole movable contact, the test button assembly comprises a conductive part and a touch part, the conductive part is arranged in the first mounting cavity, the conductive part comprises a first elastic part and a second elastic part, and the second elastic part is used for abutting against a second end of the N pole movable contact. In the application, the second elastic part of the conductive part passively contacts or separates from the N pole movable contact, structure cooperation is realized, the layout is ingenious and compact. The test button assembly is simple and ingenious in structure and contains fewer parts, the space in the first mounting cavity is fully utilized while the safety of user use is ensured, structure layout optimization is realized, the compactness of the internal structure of the circuit breaker is improved, and the overall volume and width of the circuit breaker are reduced.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more particularly to a circuit breaker. Background Technology

[0002] A residual current circuit breaker (RCCB) is a protective device used to detect residual current (leakage current) in a circuit and to quickly disconnect the power supply when leakage occurs. An RCCB contains a simulated leakage circuit. This simulated leakage circuit generates a simulated leakage current, thereby simulating a leakage fault to verify whether the circuit breaker can operate normally when a leakage fault occurs.

[0003] In existing multi-pole electromagnetic residual current circuit breakers, the structure of the simulated leakage circuit is relatively complex and occupies a large space. The layout design of the simulated leakage circuit also needs further optimization, resulting in a low degree of internal structural compactness, a large overall volume, and a need to further reduce the width of the multi-pole electromagnetic residual current circuit breaker. Utility Model Content

[0004] In view of this, this application provides a circuit breaker that can solve the problem that the structure of the simulated leakage circuit of the multi-pole electromagnetic residual current operated circuit breaker is relatively complex and the layout needs to be optimized, resulting in the low compactness and large size of the electromagnetic residual current operated circuit breaker.

[0005] This application provides a circuit breaker, including a housing, a partition, a circuit breaker N pole, a circuit breaker L1 pole, a connecting shaft, and a test button assembly.

[0006] Specifically, the outer shell has a receiving space, and a partition is disposed in the receiving space, which divides the receiving space into a first mounting cavity and a second mounting cavity.

[0007] Specifically, the N-pole of the circuit breaker is disposed in the first mounting cavity and includes an N-pole operating mechanism and an N-pole stationary contact. The N-pole operating mechanism includes an N-pole moving contact and a transmission component. The N-pole moving contact is used to contact or move away from the N-pole stationary contact. The N-pole moving contact is movably connected to a partition. The first end of the N-pole moving contact is used to contact or move away from the N-pole stationary contact, and the second end of the N-pole moving contact is rotatably connected to the transmission component.

[0008] Specifically, the circuit breaker L1 pole is disposed in the second mounting cavity and includes an L1 pole operating mechanism, which includes an L1 pole moving contact disposed at one end of the L1 pole operating mechanism.

[0009] Specifically, the connecting shaft passes through the partition and can move relative to the partition. The first end of the connecting shaft is rotatably connected to the transmission component of the N-pole operating mechanism, and the second end of the connecting shaft is rotatably connected to the other end of the L1-pole operating mechanism. The L1-pole operating mechanism is used to drive the connecting shaft to move so that the transmission component drives the first end of the N-pole moving contact to contact or separate from the N-pole stationary contact.

[0010] Specifically, the test button assembly includes a conductive element and an actuating element.

[0011] The conductive element is disposed in the first mounting cavity. The conductive element includes a first elastic part, a second elastic part, and a connecting part disposed between the first elastic part and the second elastic part. The connecting part is connected to the partition plate. The second elastic part is used to abut against the second end of the N-pole moving contact.

[0012] The actuator protrudes from the housing and is used to move the first elastic part so that the first elastic part is electrically connected to the incoming terminal of the L1 pole of the circuit breaker.

[0013] In one embodiment of this application, the conductive element is a torsion spring, which includes a spring coil located in the middle and torsion arms located on both sides. The spring coil is a connecting part, and the two torsion arms are a first elastic part and a second elastic part, respectively.

[0014] In one embodiment of this application, the first elastic portion and the second elastic portion are metal sheets with elasticity.

[0015] In one embodiment of this application, the transmission component is a connecting rod, the first end of which is rotatably connected to the second end of the N-pole moving contact, and the second end of which is rotatably connected to the first end of the connecting shaft.

[0016] In one embodiment of this application, the transmission component includes a first gear and a second gear.

[0017] Specifically, the first gear is rotatably connected to the partition plate, and the first gear is rotatably connected to the first end of the connecting shaft;

[0018] Specifically, the second gear is rotatably connected to the partition, the second gear is meshed with the first gear, and the second gear is rotatably connected to the second end of the N-pole moving contact.

[0019] In one embodiment of this application, the L1 pole operating mechanism further includes a latch, which is rotatably connected to the second end of the connecting shaft.

[0020] In one embodiment of this application, a through hole is provided on the partition plate, the cross-sectional area of ​​the through hole is larger than the cross-sectional area of ​​the connecting shaft, and the connecting shaft can move relative to the through hole under the drive of the L1 pole operating mechanism.

[0021] In one embodiment of this application, the N-pole operating mechanism further includes a tension spring, which is located on the same side of the N-pole moving contact as the N-pole stationary contact. One end of the tension spring is connected to a partition, and the other end of the tension spring is connected to the N-pole moving contact. When the N-pole moving contact and the N-pole stationary contact change from separation to contact, the elastic deformation of the tension spring increases; when the N-pole moving contact and the N-pole stationary contact change from contact to separation, the elastic deformation of the tension spring decreases.

[0022] In one embodiment of this application, the N-pole moving contact is provided with a limiting hole, and the partition is provided with a limiting post. The limiting post is inserted into the limiting hole, and the area of ​​the limiting hole is larger than the cross-sectional area of ​​the limiting post. When the N-pole moving contact and the N-pole stationary contact are separated, the limiting post is in contact with the hole wall of the limiting hole.

[0023] In one embodiment of this application, the N pole of the circuit breaker includes an arc-starting element, a stationary N pole contact is disposed on the arc-starting element, one end of the arc-starting element is a current input terminal, and the other end extends from the stationary N pole contact to the arc-extinguishing channel, and the moving N pole contact is disposed in the arc-extinguishing channel.

[0024] The above-mentioned technical solution of this application has the following beneficial effects:

[0025] By setting an independent N-pole operating mechanism within the N-pole of the circuit breaker, the insulation isolation between the N-pole and L1-pole of the circuit breaker is increased, preventing arcing during opening and closing from causing pole penetration. Simultaneously, the conductive element is housed within the first mounting cavity, and an actuating element drives the first elastic portion of the conductive element. As the N-pole moving contact moves, the second elastic portion of the conductive element passively contacts or separates from the N-pole moving contact, achieving a clever coordination between the conductive element and the N-pole operating mechanism. The structural layout is ingenious and compact.

[0026] The test button assembly features a simple and ingenious structure with fewer parts. While ensuring user safety, it makes better use of the space within the first mounting cavity, improving the compactness of the circuit breaker's internal structure. Furthermore, the main structure of the residual current circuit is no longer located within the cavity containing the residual current protection electrode, thus reducing the width of that cavity. The layout of the circuit breaker's internal structure is optimized, resulting in a reduction in the overall size and width of the circuit breaker. Attached Figure Description

[0027] Figure 1 This is an exploded perspective view of the circuit breaker according to an embodiment of this application;

[0028] Figure 2 For the N-pole edge of the circuit breaker in this embodiment of the application Figure 1 Schematic diagram of the structure in direction A;

[0029] Figure 3 For the L1 pole of the circuit breaker in this application embodiment Figure 1 Schematic diagram of the structure in direction A;

[0030] Figure 4 This is a simplified diagram showing the connection between the connecting shaft and the N-pole operating mechanism and the L1-pole operating mechanism according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the structure of an N-pole operating mechanism according to an embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the L1 pole operating mechanism and connecting shaft according to an embodiment of this application;

[0033] Figure 7 For the leakage protection electrode of this application embodiment Figure 1 Schematic diagram of the structure in direction A;

[0034] Figure 8 This is a front structural diagram of the circuit breaker according to an embodiment of this application;

[0035] Figure 9 For the L2 pole of the circuit breaker in this embodiment of the application Figure 1 Schematic diagram of the structure in direction A;

[0036] Figure 10 For the L3 pole of the circuit breaker in this embodiment of the application Figure 1 Schematic diagram of the structure in direction A;

[0037] Figure 11 This is a schematic diagram of another structure of the N-pole operating mechanism according to an embodiment of this application;

[0038] Figure 12 This is a schematic diagram of the structure of the conductive component in an embodiment of this application.

[0039] Figure label:

[0040] 1. Outer shell; 11. First mounting cavity; 12. Second mounting cavity; 2. Partition plate;

[0041] 3. Circuit breaker N pole; 31. N pole operating mechanism; 311. N pole moving contact; 3111. First end of N pole moving contact; 3112. Second end of N pole moving contact; 312. Transmission component; 313. Tension spring; 314. Limiting hole; 315. Limiting post; 32. N pole stationary contact; 33. Arc ignition component; 34. Arc extinguishing channel;

[0042] 4. Circuit breaker L1 pole; 41. L1 pole operating mechanism; 411. Locking latch; 412. Transmission lever; 413. L1 pole moving contact; 42. L1 pole stationary contact;

[0043] 5. Connecting shaft; 51. First end of connecting shaft; 52. Second end of connecting shaft; 6. Through hole;

[0044] 7. Residual current protection electrode; 71. Residual current handle; 8. Circuit breaker L2 pole; 9. Circuit breaker L3 pole; 10. Indicator light;

[0045] 20. Test button assembly; 201. Conductive component; 2011. First elastic part; 2012. Second elastic part; 2013. Connecting part; 202. Actuating component;

[0046] 30. Conductive boss;

[0047] 40. Connecting rod; 401. First end of connecting rod; 402. Second end of connecting rod; 50. First gear; 60. Second gear. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] The following is a brief explanation of the terms used in this application.

[0050] 3P+N Electromagnetic Residual Current Operated Circuit Breaker: The 3P+N circuit breaker is a protection device specifically designed for three-phase four-wire systems. It can simultaneously connect and disconnect the three phase wires (L1 / L2 / L3) and control the neutral wire in conjunction with them. Overload and short-circuit protection are achieved through a thermal-magnetic tripping mechanism, and the residual current of the line is monitored through a zero-sequence current transformer. When leakage current, overload, or short-circuit faults are detected, it can automatically disconnect the power supply, providing triple functions of protection against electric shock, electrical fires, and line overload.

[0051] L-pole of circuit breaker: also known as phase pole of circuit breaker, is the core protection unit of circuit breaker, used to connect and disconnect phase lines, and has overload and short circuit protection functions.

[0052] The N pole of the circuit breaker is specifically used to switch the neutral wire circuit. In circuit breakers of models such as 1P+N and 3P+N, it works in conjunction with the L pole of the circuit breaker to perform opening and closing actions. Its core function is to ensure physical isolation of the neutral wire and prevent the neutral wire from becoming energized during maintenance. At the same time, it works with the leakage protection electrode to realize residual current detection.

[0053] Residual current protection electrode: An important component of residual current operated circuit breakers, used to detect leakage current in the line. It compares the difference between the phase current and the neutral current using a zero-sequence current transformer. When the leakage current exceeds the threshold, it trips rapidly to prevent electric shock or electrical fire. Combined with overload / short circuit protection functions, its reliability needs to be verified monthly using a test button.

[0054] Simulated leakage circuit: The simulated leakage circuit is the core self-testing structure of the residual current operated circuit breaker. By pressing the test button, a simulated leakage current is artificially created. The simulated leakage current bypasses the zero-sequence current transformer and triggers the magnetic tripping mechanism to verify whether the circuit breaker can trip normally when a leakage fault occurs in the line.

[0055] In existing multi-pole electromagnetic residual current circuit breakers (RCCBs) that include the N-pole of the circuit breaker, the main structure simulating the leakage current circuit is located at the residual current protection pole of the RCCB. The structure of the simulated leakage current circuit is relatively complex, requiring the residual current protection pole to have more space to accommodate its main structure, resulting in a larger width. As the structural complexity within the N-pole increases, leading to a larger width of the N-pole, the size of the RCCB further increases. Therefore, the structural design of the simulated leakage current circuit and the internal layout of the RCCB need further optimization to improve the compactness of the internal structure and reduce the overall size of the RCCB.

[0056] Therefore, to solve the above problems, this application provides a circuit breaker in which the main structures, such as the conductive element and the actuating element used to conduct the simulated leakage circuit, are disposed together with the N pole of the circuit breaker in the first mounting cavity. The conductive element cooperates with the N pole of the circuit breaker, rather than with the leakage protection electrode, which can effectively reduce the width of the cavity where the leakage protection electrode is located. On the other hand, the conductive element has a simple and ingenious structure. Through the contact between the second elastic part of the conductive element and the moving contact of the N pole, the simulated leakage circuit and the N pole operating mechanism are cleverly coordinated, which reduces the structural complexity and optimizes the structural layout within the first mounting cavity, making greater use of the space within the first mounting cavity. This improves the compactness of the internal structure of the residual current operated circuit breaker and reduces the overall volume and width of the residual current operated circuit breaker.

[0057] The structure and principle of the circuit breaker in this application will be described below with reference to several embodiments.

[0058] This application does not limit the specific type of circuit breaker in its embodiments. For example, the circuit breaker in this application embodiment can be an electronic circuit breaker, an electromagnetic circuit breaker, or a smart circuit breaker. The following examples illustrate this. Figure 1 Taking the 3P+N electromagnetic residual current operated circuit breaker as an example and combining it with... Figures 2-12 Please provide a detailed explanation.

[0059] Example 1

[0060] refer to Figures 1-4 The working principle of the embodiments of this application will be described in general. Figure 1 The exploded three-dimensional structure of a 3P+N electromagnetic residual current operated circuit breaker according to an embodiment of this application is shown. Figure 2 The circuit breaker N-pole edge of an embodiment of this application is shown. Figure 1 The structure seen in direction A. Figure 3 The circuit breaker L1 pole edge of an embodiment of this application is shown. Figure 1 The structure seen in direction A. Figure 4The diagram illustrates the connection between the connecting shaft and the N-pole operating mechanism and the L1-pole operating mechanism according to an embodiment of this application.

[0061] like Figure 1 As shown, the circuit breaker in this embodiment may include a housing 1, a partition 2, a circuit breaker N pole 3, a circuit breaker L1 pole 4, a connecting shaft 5, a leakage protection pole 7, and a test button assembly 20 for switching on and off a simulated leakage circuit.

[0062] The outer casing 1 has a receiving space, and a partition 2 is disposed within the receiving space, dividing the receiving space into a first mounting cavity 11 and a second mounting cavity 12. The circuit breaker N pole 3 is disposed within the first mounting cavity 11, a portion of the test button assembly 20 is disposed within the first mounting cavity 11, and the circuit breaker L1 pole 4 is disposed within the second mounting cavity 12.

[0063] like Figure 2 As shown, in this embodiment, the N-pole 3 of the circuit breaker includes an N-pole operating mechanism 31 and an N-pole stationary contact 32. The N-pole operating mechanism 31 includes an N-pole moving contact 311 and a transmission component 312. The test button assembly 20 includes a conductive component 201 and an actuating component 202.

[0064] Specifically, the N-pole moving contact 311 is movably connected to the partition 2, the second end 3112 of the N-pole moving contact is rotatably connected to the transmission component 312, and the first end 3111 of the N-pole moving contact is used to contact or separate from the N-pole stationary contact 32 to realize the opening and closing of the N-pole 3 of the circuit breaker.

[0065] The N-pole moving contact 311 is driven by the transmission component 312. The movement of the transmission component 312 causes the second end 3112 of the N-pole moving contact to move, ultimately causing the first end 3111 of the N-pole moving contact to move closer to or further away from the N-pole stationary contact 32, completing the opening and closing action. In this embodiment, the movement of the N-pole moving contact 311 relative to the partition 2 is mainly rotation, and while rotating, the N-pole moving contact 311 also has a small amount of movement.

[0066] like Figure 3 As shown, in this embodiment, the circuit breaker L1 pole 4 may include an L1 pole operating mechanism 41, which includes an L1 pole moving contact 413 disposed at one end. The L1 pole operating mechanism 41 drives the L1 pole moving contact 413 to move, so that the L1 pole moving contact 413 contacts or moves away from the L1 pole stationary contact 42, thereby realizing the opening and closing of the circuit breaker L1 pole 4.

[0067] like Figure 4 As shown, in this embodiment, the connecting shaft 5 passes through the partition 2 and can move relative to the partition 2. The second end 52 of the connecting shaft is rotatably connected to the other end of the L1 pole operating mechanism 41 away from the L1 pole moving contact 413. Therefore, the electric arc generated when the connecting shaft 5 is away from the L1 pole moving contact 413 is closed or opened.

[0068] The first end 51 of the connecting shaft is rotatably connected to the transmission component 312 of the N-pole operating mechanism 31. The connecting shaft 5 indirectly drives the N-pole moving contact 311 to perform opening and closing actions through the transmission component 312. Therefore, the connecting shaft 5 is far away from the N-pole moving contact 311 and is also far away from the electric arc generated when the N-pole moving contact 311 opens and closes.

[0069] When the L1 pole operating mechanism 41 performs opening and closing operations, it drives the connecting shaft 5 to move, causing the transmission component 312, which is rotatably connected to the first end 51 of the connecting shaft, to move. This, in turn, drives the second end 3112 of the N pole moving contact, which is rotatably connected to the transmission component 312, to move the first end 3111 of the N pole moving contact closer to or away from the N pole stationary contact (see...). Figure 2 The N-pole stationary contact 32 in the circuit breaker completes the opening and closing action of the N-pole 3 of the circuit breaker.

[0070] A separate N-pole operating mechanism 31 is provided inside the N-pole 3 of the circuit breaker to drive the N-pole moving contact 311 to perform opening and closing operations. The N-pole operating mechanism 31 and the L1-pole operating mechanism 41 inside the L1-pole 4 of the circuit breaker are linked through the connecting shaft 5, so that the N-pole 3 and the L1-pole 4 of the circuit breaker can perform synchronous opening and closing operations.

[0071] Furthermore, the connecting shaft 5 is rotatably connected to the end of the N-pole operating mechanism 31 away from the N-pole moving contact 311, and the connecting shaft 5 is rotatably connected to the end of the L1-pole operating mechanism 41 away from the L1-pole moving contact 413, so that the electric arc generated by the N-pole moving contact 311 and the L1-pole moving contact 413 during opening and closing operations is far away from the connecting shaft 5. Although the partition 2 has a cutout at the position where the connecting shaft 5 passes through to facilitate the movement of the connecting shaft 5, the cutout position is far away from the electric arc along with the connecting shaft 5, and the electric arc cannot pass through the poles from the position where the connecting shaft 5 passes through the partition 2. The N-pole moving contact 311 and the L1-pole moving contact 413 are separated by the partition 2, thereby effectively isolating the electric arc generated when the N-pole 3 and the L1-pole 4 of the circuit breaker are opened and closed, avoiding problems such as short circuits and circuit breaker malfunction caused by electric arc passing through the poles, and having a better insulation effect, effectively improving the safety performance of the circuit breaker.

[0072] Return to reference Figure 2 As shown, the test button assembly 20 includes a conductive element 201 and an actuating element 202. The conductive element 201 is disposed in the first mounting cavity (see...). Figure 1 Inside the first mounting cavity 11), the trigger 202 protrudes from the outer shell 1.

[0073] Specifically, the conductive element 201 may include a first elastic portion 2011, a second elastic portion 2012, and a connecting portion 2013 disposed between the first elastic portion 2011 and the second elastic portion 2012. The connecting portion 2013 is connected to the partition 2, and the second elastic portion 2012 is used to abut against the second end 3112 of the N-pole moving contact. When the N-pole 3 of the circuit breaker is in the closed state, that is, when the first end 3111 of the N-pole moving contact is in contact with the N-pole stationary contact 32, the second elastic portion 2012 contacts the side of the second end 3112 of the N-pole moving contact. Since the N-pole moving contact 311 is directly or indirectly electrically connected to the output terminal of the N-pole 3 of the circuit breaker, the second elastic portion 2012 is indirectly electrically connected to the output terminal of the N-pole 3 of the circuit breaker at this time.

[0074] Specifically, the actuator 202 is used to move the first elastic part 2011, which extends to one side of the conductive boss 30. The conductive boss 30 is directly or indirectly electrically connected to the input terminal of the circuit breaker L1 pole 4. The actuator 202 drives the first elastic part 2011 to contact the conductive boss 30. As part of the simulated leakage circuit, the conductive boss 30 is connected to the circuit breaker L1 pole (see...). Figure 1 The incoming terminal of the circuit breaker L1 pole 4 is directly or indirectly electrically connected. Therefore, when the actuating member 202 is pressed, causing the first elastic part 2011 to contact the conductive boss 30, the first elastic part 2011 is indirectly electrically connected to the incoming terminal of the circuit breaker L1 pole 4.

[0075] Therefore, pressing the actuator 202 connects the input terminal of circuit breaker L1 pole 4 to the output terminal of circuit breaker N pole 3 via the conductive element 201, causing the current in the circuit to become unbalanced, thus simulating the generation of leakage current. At this time, if the leakage protection electrode (see...) Figure 1 If the residual current device (RCD) 7 in the circuit breaker senses a simulated leakage current and causes the circuit breaker to trip, then the RCD 7 is verified to be working properly. If the RCD 7 does not trip the circuit breaker, it indicates a circuit breaker malfunction and requires repair.

[0076] The circuit breaker provided in this application embodiment increases the insulation isolation between the N pole 3 and the L1 pole 4 of the circuit breaker by setting an independent N pole operating mechanism 31 in the N pole 3 of the circuit breaker, thus preventing the arc generated during opening and closing from passing through the pole. At the same time, the conductive element 201 is set in the first mounting cavity 11, and the first elastic part 2011 of the conductive element 201 is driven by the actuating element 202. As the N pole moving contact 311 moves, the second elastic part 2012 of the conductive element 201 passively contacts or separates from the N pole moving contact 311, realizing the ingenious cooperation between the conductive element 201 and the N pole operating mechanism 31. The structural layout is ingenious and compact.

[0077] The test button assembly 20 has a simple and ingenious structure with fewer parts. While ensuring user safety, it makes better use of the space within the first mounting cavity 11, improving the compactness of the circuit breaker's internal structure and optimizing the structural layout within the first mounting cavity 11. Simultaneously, the main structure of the leakage protection circuit is no longer housed within the cavity containing the leakage protection electrode 7, thus reducing the width of the cavity. The optimized layout of the circuit breaker's internal structure results in a reduction in the overall volume and width of the circuit breaker.

[0078] In this embodiment, the conductive element 201 is a torsion spring, which may include a spring coil located in the middle and torsion arms located on both sides. The spring coil is a connecting part 2013, and the two torsion arms are a first elastic part 2011 and a second elastic part 2012, respectively.

[0079] The torsion spring is elastic. When the trigger 202 is pressed, the trigger 202 drives one side of the torsion arm, which is the first elastic part 2011, to contact the conductive boss 30. When the trigger 202 is released, the elasticity of the torsion spring causes the torsion arm, which is the first elastic part 2011, to automatically move away from the conductive boss 30 and reset, and drives the trigger 202 to reset.

[0080] refer to Figure 5 , Figure 5 This application illustrates a structure of an N-pole operating mechanism 31 according to an embodiment of the present application.

[0081] like Figure 5 As shown, in this embodiment, the transmission component 312 is a connecting rod 40. The first end 401 of the connecting rod is rotatably connected to the second end 3112 of the N-pole moving contact, and the second end 402 of the connecting rod is rotatably connected to the first end 51 of the connecting shaft.

[0082] The following example, taking the action of the N-pole operating mechanism 31 when the N-pole 3 of the circuit breaker is closed, illustrates the working principle of the N-pole operating mechanism 31 in this embodiment.

[0083] like Figure 5 As shown, when the L1 pole operating mechanism (see...) Figure 3 When the L1 pole operating mechanism 41 drives the connecting shaft 5 downward, the connecting shaft 5 drives the second end 402 of the connecting rod downward. Since the first end 401 of the connecting rod is rotatably connected to the second end 3112 of the N pole moving contact, the movement trajectory of the first end 401 of the connecting rod is limited by the N pole moving contact 311. At this time, the first end 401 of the connecting rod drives the second end 3112 of the N pole moving contact away from the N pole stationary contact (see...). Figure 2The N-pole stationary contact 32 moves to one side. Since the movement of the N-pole moving contact 311 relative to the partition 2 is mainly rotation, when the second end 3112 of the N-pole moving contact moves away from the N-pole stationary contact 32, the first end 3111 of the N-pole moving contact will approach the N-pole stationary contact 32 and eventually contact the N-pole stationary contact 32 to complete the closing action.

[0084] Return to reference Figure 2 As shown, in this embodiment, the N-pole operating mechanism 31 also includes a tension spring 313. The tension spring 313 and the N-pole stationary contact 32 are located on the same side of the N-pole moving contact 311. One end of the tension spring 313 is connected to the partition plate 2, and the other end of the tension spring 313 is connected to the N-pole moving contact 311.

[0085] When the N-pole moving contact 311 and the N-pole stationary contact 32 change from separation to contact, the tension spring 313 is stretched, its elastic deformation increases, and the tension force exerted by the tension spring 313 on the N-pole moving contact 311 also increases. At this time, the N-pole moving contact 311 needs to overcome the tension force of the tension spring 313 to achieve closing. When the N-pole moving contact 311 and the N-pole stationary contact 32 change from contact to separation, the tension spring 313, which was originally in a stretched state, applies a tension force to the N-pole moving contact 311, which helps to quickly separate the N-pole moving contact 311 from the N-pole stationary contact 32. During the separation process, the tension spring 313 shortens, its elastic deformation decreases, and the tension force exerted by the tension spring 313 on the N-pole moving contact 311 also decreases.

[0086] When the N-pole moving contact 311 switches from the closed state to the open state, the transmission member 312 applies an directional force to the second end 3112 of the N-pole moving contact. Figure 2 The force acting from the upper left, in conjunction with the tension force of the tension spring 313 on the N-pole moving contact 311, jointly drives the N-pole moving contact 311 along... Figure 2 The counterclockwise rotation causes the first end 3111 of the N-pole moving contact to separate from the N-pole stationary contact 32.

[0087] In this embodiment, the force exerted by the tension spring 313 on the N-pole moving contact 311 can accelerate the opening action of the N-pole moving contact 311, enabling the N-pole 3 of the circuit breaker to open quickly, and effectively preventing accidental closing after opening, thereby improving the reliability and safety of the N-pole 3 of the circuit breaker after opening.

[0088] In this embodiment, the N-pole moving contact 311 is provided with a limiting hole 314, and the partition 2 is provided with a limiting post 315, which is inserted into the limiting hole 314. The area of ​​the limiting hole 314 is larger than the cross-sectional area of ​​the limiting post 315, allowing the limiting post 315 to move within the limiting hole 314. When the limiting post 315 contacts the inner wall of the limiting hole 314, it can limit the movement of the moving contact.

[0089] Specifically, when the N-pole moving contact 311 is separated from the N-pole stationary contact 32, the limiting post 315 contacts the wall of the limiting hole 314. At this time, the N-pole moving contact 311 is simultaneously subjected to forces from the transmission member 312, the tension spring 313, and the limiting post 315, thus maintaining force balance.

[0090] When the N-pole moving contact 311 contacts the N-pole stationary contact 32, the limiting post 315 may or may not contact the wall of the limiting hole 314. When the limiting post 315 does not contact the wall of the limiting hole 314, the N-pole moving contact 311 is simultaneously subjected to forces from the transmission member 312, the tension spring 313, and the N-pole stationary contact 32, thus maintaining force balance.

[0091] In this embodiment, a through hole 6 is provided on the partition plate 2. The through hole 6 is a hollow in the partition plate 2. The cross-sectional area of ​​the through hole 6 is larger than the cross-sectional area of ​​the connecting shaft 5, so that when the L1 pole operating mechanism 41 drives the connecting shaft 5 to move relative to the through hole 6, the through hole 6 provides the connecting shaft 5 with the space to move.

[0092] This embodiment does not limit the shape of the through hole 6. The through hole 6 can have various shapes. For example, the through hole 6 can be arc-shaped or square.

[0093] In this embodiment, the N pole 3 of the circuit breaker may further include an arc-initiating element 33. The arc-initiating element 33 is provided with an N pole stationary contact 32. The N pole stationary contact 32 is disposed on the arc-initiating element 33. One end of the arc-initiating element 33 is a current input terminal, which is directly or indirectly electrically connected to the incoming terminal of the N pole 3 of the circuit breaker. The other end extends from the N pole stationary contact 32 to the arc-extinguishing channel 34 to guide the arc into the arc-extinguishing channel 34. The N pole moving contact 311 is disposed in the arc-extinguishing channel 34.

[0094] When the N-pole moving contact 311 comes into contact with or separates from the N-pole stationary contact 32, the generated arc is also located in the arc extinguishing channel 34. Therefore, in this embodiment, the circuit breaker prevents the arc from passing through the pole by the partition 2, and restricts the arc spread by the arc extinguishing channel 34, thereby achieving further confinement and isolation of the arc, and extinguishing the arc by using the arc extinguishing channel 34, so that the circuit breaker has good insulation performance.

[0095] refer to Figure 6 , Figure 6 The structure of the L1 pole operating mechanism 41 and the connecting shaft 5 according to an embodiment of this application is shown.

[0096] like Figure 6As shown, in this embodiment, the L1-pole operating mechanism 41 is a common multi-pole lever linkage structure. The L1-pole operating mechanism 41 may include a latch 411 rotatably mounted on the transmission lever 412. The latch 411 is rotatably connected to the second end 52 of the connecting shaft. When the L1-pole operating mechanism 41 performs opening and closing actions, the latch 411 drives the connecting shaft 5 to move, thereby driving the transmission component (see...) through the connecting shaft 5. Figure 2 The transmission component 312 in the middle is activated, ultimately driving the N-pole moving contact (see...) Figure 2 The N-pole moving contact 311 in the circuit performs opening and closing operations.

[0097] Return to reference Figure 1 As shown, the circuit breaker in this embodiment of the application further includes circuit breaker L2 pole 8 and circuit breaker L3 pole 9.

[0098] Combination Figure 1 And refer to Figure 7 and Figure 8 , Figure 7 The leakage protection electrode 7 of this application embodiment is shown. Figure 1 The structure seen in direction A. Figure 8 The front structure of the circuit breaker according to an embodiment of this application is shown.

[0099] like Figure 7 As shown, the residual current device (RCD) 7 in this embodiment is used to disconnect the circuit when a leakage fault occurs. The RCD 7 only operates when a leakage fault occurs in the line. When no leakage fault occurs, the RCD 7 does not operate and is in the closed state. The corresponding leakage handle 71 is in the closed position, so the position of the leakage handle 71 can be observed to determine whether a leakage fault has occurred in the line. For the RCD 7, a simulated leakage circuit needs to be periodically connected to test and verify its reliability.

[0100] Specifically, when the leakage current exceeds the threshold, the leakage protection electrode 7 quickly activates, and drives... Figure 1 The circuit breakers L1 pole 4, L2 pole 8, and L3 pole 9 shown are tripped to achieve leakage current protection.

[0101] Combination Figure 1 and Figure 8As shown, the housing 1 is equipped with indicator lights 10 to indicate the location and corresponding opening / closing status of circuit breaker L1 pole 4, circuit breaker L2 pole 8, and circuit breaker L3 pole 9. For example, when indicator light 10 is red, it indicates that circuit breaker L1 pole 4 is in the closed state; when indicator light 10 is green, it indicates that circuit breaker L1 pole 4 is in the open state. When any one of circuit breaker L1 pole 4, circuit breaker L2 pole 8, or circuit breaker L3 pole 9 malfunctions and cannot open or close normally, the status of indicator lights 10 can be used to determine which pole of circuit breaker L1 pole 4, circuit breaker L2 pole 8, or circuit breaker L3 pole 9 is faulty.

[0102] Combination Figure 3 And refer to Figure 9 and Figure 10 , Figure 9 The circuit breaker L2 pole 8-edge of an embodiment of this application is shown. Figure 1 The structure seen in direction A. Figure 10 The circuit breaker L3 pole 9 edge of an embodiment of this application is shown. Figure 1 The structure seen in the middle A direction.

[0103] like Figure 3 , Figure 9 and Figure 10 As shown, in this embodiment, the L2 pole 8, the L3 pole 9, and the L1 pole 4 of the circuit breaker can adopt the same structure.

[0104] Example 2

[0105] The difference between Embodiment 2 and Embodiment 1 lies in the structure of the transmission component 312; the rest of the structure is the same (i.e., the structures of the partition 2, circuit breaker L1 pole 4, leakage protection pole 7, circuit breaker L2 pole 8, circuit breaker L3 pole 9, etc. are the same).

[0106] The following is combined with Figure 2 And refer to Figure 11 The transmission component 312 of the embodiments of this application will be described in detail. Figure 11 The specific structure of the transmission component 312 according to an embodiment of this application is shown.

[0107] like Figure 11 As shown, in this embodiment, the transmission component 312 may include a first gear 50 and a second gear 60, both of which are rotatably connected to the partition plate 2. The first gear 50 is rotatably connected to the first end 51 of the connecting shaft, the second gear 60 is meshed with the first gear 50, and the second gear 60 is rotatably connected to the second end 3112 of the N-pole moving contact.

[0108] The following uses the N pole of the circuit breaker (see...) Figure 2 Taking the action process of the N-pole operating mechanism 31 when the circuit breaker N-pole 3) is closed as an example, the working principle of the transmission component 312 in this embodiment is explained.

[0109] When L1 pole operating mechanism (see Figure 4 When the L1 pole operating mechanism 41) closes and drives the connecting shaft 5 to move downward, the connecting shaft 5 will drive the first gear 50 along... Figure 11 When the first gear 50 rotates clockwise, the second gear 60, which meshes with the first gear 50, rotates counterclockwise accordingly. The second gear 60 drives the second end 3112 of the N-pole moving contact, which is rotatably connected to it, away from the N-pole stationary contact (see...). Figure 2 The first end 3111 of the N-pole moving contact is close to the N-pole stationary contact 32. Finally, the first end 3111 of the N-pole moving contact and the N-pole stationary contact 32 make contact, completing the closing action of the N-pole 3 of the circuit breaker.

[0110] Example 3

[0111] The difference between Embodiment 3 and Embodiments 1 and 2 lies in the structure of the conductive component 201. The structure of the transmission component 312 in Embodiment 3 can be the same as that in Embodiment 1 or Embodiment 2; this application does not specifically limit this. The remaining structures of Embodiment 3 are the same as those in Embodiments 1 and 2 (i.e., the structures of the partition 2, circuit breaker L1 pole 4, leakage protection pole 7, circuit breaker L2 pole 8, circuit breaker L3 pole 9, etc., are the same).

[0112] The following is combined with Figure 2 And refer to Figure 12 The conductive element 201 of the embodiments of this application will be described in detail. Figure 12 The present application illustrates a structure of a conductive element 201 according to an embodiment of the present application.

[0113] like Figure 2 and 12 As shown, in this embodiment, the first elastic portion 2011 and the second elastic portion 2012 in the conductive member 201 are elastic metal sheets. The first elastic portion 2011 is inclined from the connecting portion 2013 toward the side closer to the actuating member 202. One end of each of the two metal sheets is fixedly connected to the connecting portion 2013 of the conductive member 201.

[0114] In the conductive member 201, a metal sheet serving as the first elastic part 2011 is connected to the actuating member 202 and moves towards the conductive boss (see...). Figure 2 The conductive protrusion 30 extends to one side of the metal piece, which is driven to contact or move away from the conductive protrusion 30 by the actuator 202. After the actuator 202 is released, since the metal piece, which is the first elastic part 2011, has elasticity and tilts towards the side closer to the actuator 202, the metal piece of the first elastic part 2011 will reset itself and drive the actuator 202 to reset.

[0115] Another metal piece, serving as the second elastic part 2012, faces the N-pole moving contact (see...). Figure 2 The metal sheet extends to the side of the N-pole moving contact 311, and the connection state between the metal sheet and the N-pole moving contact 311 changes with the movement of the N-pole moving contact 311.

[0116] This embodiment does not limit the specific connection structure between the connecting part 2013 and the partition 2. For example, the connecting part 2013 can be detachably connected to the partition 2 by bolts, or it can be welded to the partition 2.

[0117] The above embodiments are a further detailed description of the circuit breaker, and it should not be assumed that the specific implementation of the circuit breaker is limited to these descriptions. All equivalent implementations or modifications that do not depart from the scope of this application should be included within the scope of this application.

[0118] In summary, this application increases the insulation between the N-pole 3 and the L1-pole 4 of the circuit breaker by setting an independent N-pole operating mechanism 31 within the N-pole 3 of the circuit breaker, thus preventing arcing during opening and closing from causing pole penetration. Simultaneously, the conductive element 201 is placed within the first mounting cavity 11, and the first elastic portion 2011 of the conductive element 201 is driven by the actuating element 202. Furthermore, as the N-pole moving contact 311 moves, the second elastic portion 2012 of the conductive element 201 passively contacts or separates from the N-pole moving contact 311, achieving a clever cooperation between the conductive element 201 and the N-pole operating mechanism 31. The structural layout is ingenious and compact.

[0119] The test button assembly 20 has a simple and ingenious structure with fewer parts. While ensuring user safety, it makes better use of the space within the first mounting cavity 11, improving the compactness of the circuit breaker's internal structure and optimizing the structural layout within the first mounting cavity 11. Simultaneously, the main structure of the leakage protection circuit is no longer housed within the cavity containing the leakage protection electrode 7, thus reducing the width of the cavity. The optimized layout of the circuit breaker's internal structure results in a reduction in the overall volume and width of the circuit breaker.

[0120] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details have been omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0121] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0122] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0123] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0124] In the description of this application, it should be noted that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0125] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "fit" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0126] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A circuit breaker, characterized in that, include: An outer casing, wherein an accommodating space is provided within the outer casing; A partition is disposed within the receiving space, dividing the receiving space into a first mounting cavity and a second mounting cavity; The circuit breaker N-pole is disposed in the first mounting cavity and includes an N-pole operating mechanism and an N-pole stationary contact. The N-pole operating mechanism includes an N-pole moving contact and a transmission component. The N-pole moving contact is movably connected to the partition plate. The first end of the N-pole moving contact is used to contact or move away from the N-pole stationary contact. The second end of the N-pole moving contact is rotatably connected to the transmission component. The circuit breaker L1 pole is disposed in the second mounting cavity. The circuit breaker L1 pole includes an L1 pole operating mechanism, and the L1 pole operating mechanism includes an L1 pole moving contact disposed at one end of the L1 pole operating mechanism. A connecting shaft passes through the partition and is movable relative to the partition. The first end of the connecting shaft is rotatably connected to the transmission component of the N-pole operating mechanism, and the second end of the connecting shaft is rotatably connected to the other end of the L1-pole operating mechanism. The L1 pole operating mechanism is used to drive the connecting shaft to move, so that the transmission component drives the first end of the N pole moving contact to contact or separate from the N pole stationary contact. A test button assembly, the test button assembly including a conductive element and a trigger element; The conductive element is disposed in the first mounting cavity. The conductive element includes a first elastic part, a second elastic part, and a connecting part disposed between the first elastic part and the second elastic part. The connecting part is connected to the partition plate. The second elastic part is used to abut against the second end of the N-pole moving contact. The actuating element protrudes from the housing and is used to drive the first elastic part to move so that the first elastic part is electrically connected to the incoming terminal of the L1 pole of the circuit breaker.

2. The circuit breaker according to claim 1, characterized in that, The conductive component is a torsion spring, which includes a spring coil in the middle and torsion arms on both sides. The spring coil is the connecting part, and the two torsion arms are the first elastic part and the second elastic part, respectively.

3. The circuit breaker according to claim 1, characterized in that, The first elastic part and the second elastic part are metal sheets with elasticity.

4. The circuit breaker according to claim 1, characterized in that, The transmission component is a connecting rod, the first end of which is rotatably connected to the second end of the N-pole moving contact, and the second end of which is rotatably connected to the first end of the connecting shaft.

5. The circuit breaker according to claim 1, characterized in that, The transmission component includes: The first gear is rotatably connected to the partition plate, and the first gear is rotatably connected to the first end of the connecting shaft; The second gear is rotatably connected to the partition plate, the second gear meshes with the first gear, and the second gear is rotatably connected to the second end of the N-pole moving contact.

6. The circuit breaker according to any one of claims 1 to 5, characterized in that, The L1 pole operating mechanism also includes a latch, which is rotatably connected to the second end of the connecting shaft.

7. The circuit breaker according to any one of claims 1 to 5, characterized in that, The partition plate has a through hole, the cross-sectional area of ​​which is larger than that of the connecting shaft, and the connecting shaft can move relative to the through hole under the drive of the L1 pole operating mechanism.

8. The circuit breaker according to any one of claims 1 to 5, characterized in that, The N-pole operating mechanism also includes a tension spring, which is located on the same side of the N-pole moving contact as the N-pole stationary contact. One end of the tension spring is connected to the partition plate, and the other end of the tension spring is connected to the N-pole moving contact. When the N-pole moving contact changes from separation to contact with the N-pole stationary contact, the elastic deformation of the tension spring increases; when the N-pole moving contact changes from contact to separation with the N-pole stationary contact, the elastic deformation of the tension spring decreases.

9. The circuit breaker according to claim 8, characterized in that, The N-pole moving contact is provided with a limiting hole, and the partition is provided with a limiting post. The limiting post is inserted into the limiting hole, and the area of ​​the limiting hole is larger than the cross-sectional area of ​​the limiting post. When the N-pole moving contact and the N-pole stationary contact are separated, the limiting post is in contact with the wall of the limiting hole.

10. The circuit breaker according to any one of claims 1 to 5, characterized in that, The N pole of the circuit breaker includes an arc-starting element, the N pole stationary contact is disposed on the arc-starting element, one end of the arc-starting element is a current input terminal, and the other end extends from the N pole stationary contact to the arc-extinguishing channel, and the N pole moving contact is disposed in the arc-extinguishing channel.

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