A circuit breaker with leakage indication and short circuit protection

Abstract

The application discloses a circuit breaker with electric leakage indication and short circuit protection, which comprises a shell, a tripping assembly, a short circuit protection assembly and an electric leakage protection assembly. The short circuit protection assembly comprises a short circuit coil, and a short circuit push rod is arranged in the short circuit coil. When a short circuit occurs, the short circuit push rod triggers the tripping assembly to be tripped. The electric leakage protection assembly comprises an electric leakage coil, and an electric leakage push rod is arranged on the electric leakage coil. When electric leakage occurs, the electric leakage push rod directly or indirectly pushes the short circuit push rod, and triggers the tripping assembly to be tripped. The circuit breaker further comprises an indication assembly which is used for indicating an electric leakage state when electric leakage occurs, and limiting the short circuit push rod or the electric leakage push rod. The indication assembly further comprises a reset member which is used for keeping the indication assembly to limit the short circuit push rod or the electric leakage push rod. The limitation of the short circuit push rod or the electric leakage push rod is removed by resetting the indication assembly, so that the short circuit push rod or the electric leakage push rod is reset. Thus, it can be determined whether short circuit tripping or electric leakage tripping is caused by one circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of circuit breakers, and more specifically to a circuit breaker with leakage current indication and short-circuit protection. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Currently, circuit breakers are mainly divided into residual current devices (RCDs) and short-circuit switches. Both are used together to disconnect in the event of leakage or short circuit, which is cumbersome. Existing technology includes a Chinese patent with patent number 202220606226.6, entitled "Circuit Breaker," which discloses a circuit breaker. The circuit breaker includes a housing, a tripping assembly, a short-circuit protection mechanism, and a residual current protection mechanism. The tripping assembly is disposed in the housing. The short-circuit protection mechanism is disposed in the housing and is used to release the tripping assembly in the event of a short circuit. The residual current protection mechanism is disposed in the housing. The residual current protection mechanism and the short-circuit protection mechanism are driven together, and the residual current protection mechanism is used to drive the short-circuit protection mechanism to release the tripping assembly in the event of leakage. This existing technology combines short circuit and leakage current switch, using the leakage current iron core to drive the short circuit iron core to achieve the effect of breaking the circuit. However, there is also a significant problem: when a circuit breaks, it is impossible to determine whether the circuit trips due to a short circuit or a leakage current. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a circuit breaker with leakage current indication and short circuit protection.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A circuit breaker with leakage current indication and short circuit protection include: Housing, tripping assembly, short circuit protection assembly, and leakage protection assembly; The tripping assembly, short-circuit protection assembly, and leakage protection assembly are located inside the housing; The short-circuit protection component includes a short-circuit coil, and a short-circuit push rod is provided inside the short-circuit coil. When a short circuit occurs, the short-circuit push rod triggers the tripping component to release the tripping mechanism. The leakage protection component includes a leakage coil, and a leakage push rod is provided on the leakage coil. When leakage occurs, the leakage push rod directly or indirectly pushes the short-circuit push rod, triggering the tripping component to release. It also includes an indicator component for indicating the leakage state in the event of a leakage and for limiting the short-circuit push rod or the leakage push rod; and a tripping component. The indicating component also includes a reset component, which is used to maintain the indication component's limit on the short-circuit push rod or leakage push rod. By resetting the indicating component, the limit on the short-circuit push rod or leakage push rod is released, thereby resetting the short-circuit push rod or leakage push rod.

[0005] As a further improvement of the present invention The indicating component includes a reset member, and the housing has an opening through which the reset member extends into the housing. The reset member is provided with a limit block located below the leakage current push rod, and the leakage current push rod is provided with a limit mechanism. When leakage occurs, the limiting mechanism extends out of the short-circuit coil along with the leakage push rod. The limiting block is used to cooperate with the limiting mechanism to limit the leakage push rod. The return component is used to embed the limiting block into the limiting mechanism.

[0006] As a further improvement of the present invention The limiting mechanism includes an end post disposed on the leakage current push rod, the end post being located outside the leakage current coil, and the longitudinal width of the end post being greater than the diameter of the leakage current push rod; In the normal closed state, the end post abuts against the limit block. When the leakage circuit is activated, the end post moves with the leakage push rod. Under the action of the return element, the limit block abuts against the leakage push rod.

[0007] As a further improvement of the present invention The housing is provided with a sliding groove, and the reset component is disposed in the sliding groove.

[0008] As a further improvement of the present invention The indicating component includes a reset component and a rotating component. The rotating component is rotatably connected inside the housing. One end of the rotating component is provided with a limit buckle, and the other end of the rotating component is located between the short-circuit push rod and the leakage push rod. The reset component is provided with a slot for the limit buckle to be inserted. The housing is provided with an opening, and the reset component extends into the housing through the opening. In the normal closed state, the limit buckle on the rotating component is inserted into the slot on the reset component. When leakage occurs, the leakage push rod pushes the rotating component to rotate, and the limit buckle on the rotating component disengages from the slot. Under the action of the return component, the reset component is displaced, and the limit buckle abuts against the reset component. The other end of the rotating component pushes the short-circuit push rod, triggering the tripping assembly to release.

[0009] As a further improvement of the present invention The indicating component includes a reset component and a sliding latch component. The housing has an opening, through which the reset component extends into the housing. The sliding latch component has a limit buckle and a slot for the limit buckle to be inserted. The sliding latch component is slidably connected to the housing. The sliding latch component has a pusher component located between a short-circuit push rod and a leakage push rod. In the normal closed state, the limit latch on the sliding lock is inserted into the slot on the reset component. When leakage occurs, the leakage push rod pushes the push component to move, and the limit latch on the sliding lock disengages from the slot. Under the action of the return component, the reset component is displaced, and the limit latch comes into contact with the reset component. The push component pushes the short-circuit push rod, triggering the tripping component to release.

[0010] As a further improvement of the present invention A compression spring is provided on the housing, which keeps the sliding lock fastener moving toward the reset member. An abutting connecting platform is provided inside the housing, and an abutting connecting part is provided on the sliding lock fastener. One end of the compression spring abuts against the abutting connecting platform, and the other end abuts against the abutting connecting part.

[0011] As a further improvement of the present invention The housing is provided with a sliding groove, and the sliding lock is provided with a sliding part, which is slidably connected in the sliding groove.

[0012] As a further improvement of the present invention The return component is a spring, a first mounting platform is provided inside the housing, a second mounting platform is provided on the reset component, and the two ends of the spring abut against the first mounting platform and the second mounting platform, respectively.

[0013] As a further improvement of the present invention The indicating component includes a leakage current rotary switch and a rotating component. One end of the rotating component is provided with a limit buckle, and the other end of the rotating component is located between the short-circuit push rod and the leakage current push rod. The leakage current rotary switch is provided with a slot for the limit buckle to be inserted. In the normal closed state, the limit buckle on the rotating part is embedded in the slot of the leakage current rotary switch. When leakage occurs, the leakage current push rod pushes the rotating part to rotate, and the limit buckle on the rotating part disengages from the slot. Under the action of the return element, the rotary switch rotates, and the limit buckle abuts against the leakage current rotary switch. The other end of the rotating part pushes the short-circuit push rod, triggering the tripping assembly to release.

[0014] As a further improvement of the present invention The recovery element is a torsion spring, with one end connected to the housing and the other end connected to the leakage current rotary switch.

[0015] As a further improvement of the present invention The tripping assembly includes a short-circuit rotary switch that opens when a short circuit occurs. The short-circuit rotary switch has a short-circuit handle, and the leakage current rotary switch has a leakage current handle. The leakage current handle is provided with a linkage in the closing direction. When a leakage current occurs, the linkage pushes the short-circuit handle.

[0016] The main working principle of this invention is as follows: When a short circuit occurs, the short-circuit push rod in the short-circuit coil of the short-circuit protection component moves, triggering the tripping component to release. At this time, the indicating component remains unchanged, thus allowing the circuit breaker to be tripped based on the cause of the short circuit. When a leakage current occurs, the leakage current push rod in the leakage current coil directly or indirectly pushes the short-circuit push rod in the short-circuit coil, triggering the tripping component to release. At this time, the indicating component limits the short-circuit push rod or the leakage current push rod, indicating a leakage current trip. Simultaneously, the reset component maintains the limit on the short-circuit push rod or the leakage current push rod. The reset component must be reset first to release the limit on the short-circuit push rod or the leakage current push rod before the entire circuit breaker can be reclosed. This allows the circuit breaker to determine whether a short-circuit trip or a leakage current trip is caused by a single circuit breaker. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the exploded structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the first path tripping structure of Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the first path tripping explosion structure of Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the second-path circuit breaker structure in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the closing structure according to Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the second rotating plate structure according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of a leakage coil structure in the prior art; Figure 9 This is a schematic diagram of a short-circuit coil structure in the prior art; Figure 10 This is a schematic diagram of the tripping structure according to Embodiment 2 of the present invention; Figure 11 This is a schematic diagram of the closing structure according to Embodiment 2 of the present invention; Figure 12 This is a schematic diagram of the tripping structure according to Embodiment 3 of the present invention; Figure 13 This is a schematic diagram of the explosion structure of the circuit breaker in Embodiment 3 of the present invention; Figure 14 This is a schematic diagram of a short-circuit tripping structure according to Embodiment 3 of the present invention; Figure 15 This is a schematic diagram of the closing structure according to Embodiment 3 of the present invention; Figure 16 This is a schematic diagram of the tripping structure in Embodiment 4 of the present invention; Figure 17 This is a schematic diagram of the closing structure in Embodiment 4 of the present invention; Figure 18 This is a schematic diagram of the tripping structure in Embodiment 5 of the present invention; Figure 19 This is a schematic diagram of the closing structure in Embodiment 5 of the present invention.

[0018] Figure label: 1. Housing; 101. First rotating column; 102. Second rotating column; 103. First abutment platform; 104. First connecting contact head; 105. Second connecting contact head; 106. First fixed contact head; 107. First moving contact head; 108. First wire; 109. Opening; 110. Sliding groove; 111. First mounting platform; 112. Rotating shaft; 113. First abutment platform; 121. Third connecting contact head; 122. Fourth connecting contact head; 123. Second fixed contact head; 124. Second moving contact head; 125. Second wire; 126. Third wire; 127. Magnetic ring; 128. Deformation connecting plate; 2. Tripping assembly; 21. Short-circuit rotary switch; 211. First rotating hole; 212. First rotating hole; 213. Short-circuit handle; 2131. Boss; 22. Connecting rod; 221. First rotating column; 222. Second rotating column; 23. First rotating plate; 231. Second rotating hole; 232. First abutting part; 233. Third rotating column; 234. Fourth rotating column; 235. Extension plate; 236. Second positioning column; 237. Tension spring; 24. Second rotating plate; 241. Fifth rotating hole; 242. First positioning hole; 243. First positioning pin; 25. Third rotating plate; 251. Sixth rotating hole; 252. Second positioning hole; 26. Abutting part; 261. Third rotating hole; 262. Second rotating hole; 263. Second abutting part; 27. Tripping element; 271. Fourth rotating hole; 272. Third abutment part; 273. Trigger bar; 3. Short-circuit protection assembly; 31. Short-circuit coil; 311. Short-circuit push rod; 312. Short-circuit wound coil; 32. Short-circuit housing; 33. Short-circuit return spring; 34. First annular stage; 4. Residual current protection component; 41. Residual current coil; 42. Residual current push rod; 4211. End post; 43. Residual current rotary switch; 44. Residual current handle; 45. Linkage component; 46. Torsion spring; 47. Second abutment; 48. Residual current housing; 49. Residual current wound coil; 422. Second annular platform; 423. Residual current return spring; 431. Seventh rotating hole; 5. Indicator assembly; 51. Return component; 52. Reset component; 521. Limit block; 522. Second mounting platform; 523. Slot; 53. Rotating component; 531. Limit buckle; 532. Hinge hole; 54. Sliding lock component; 541. Pushing component; 542. Abutting connection part; 543. Sliding part; 55. Compression spring; 56. Abutting connection platform; 57. Sliding groove.

[0019] Example 1: Refer to Figures 1 to 7 This embodiment is a circuit breaker, which has a housing 1, and a tripping assembly 2, a short-circuit protection assembly 3, and a leakage protection assembly 4 are disposed inside the housing 1; The short-circuit protection component 3 mainly consists of a short-circuit coil 31, which is a commonly used short-circuit coil 31 in the prior art, such as... Figure 9 The short-circuit coil 31 shown in the prior art generally consists of a short-circuit housing 32, a short-circuit push rod 311, and a short-circuit wound coil 312. The short-circuit housing 32 has an inner wall, and the short-circuit push rod 311 has a first annular platform 34. A short-circuit return spring 33 is provided between the first annular platform 34 and the inner wall of the short-circuit housing 32. When a short circuit occurs, the short-circuit push rod 311 will move, pushing the tripping assembly 2 to trip. Under the action of the short-circuit return spring 33, after the tripping is completed, the short-circuit push rod 311 will return to its original position.

[0020] The leakage current protection component 4 mainly consists of a leakage current coil 41, which is a commonly used leakage current coil 41 in the prior art, such as... Figure 8 The prior art leakage coil 41 generally consists of a leakage housing 48, a leakage push rod 42, and a leakage wound coil 49. The leakage housing 1 has an inner wall, and the leakage push rod 42 has a second annular platform 422. A leakage return spring 423 is provided between the second annular platform 422 and the inner wall of the leakage housing 1. When leakage occurs, the leakage push rod 42 will move, thereby directly or indirectly pushing the short-circuit push rod 311 to move, thereby causing the tripping assembly 2 to trip. Under the action of the leakage return spring 423, the leakage push rod 42 will return to its original position.

[0021] The tripping assembly 2 is mainly used to trip the entire circuit breaker. There are multiple ways to achieve this in the prior art. In order to better illustrate this embodiment, we will use the most common tripping assembly 2 for description. The tripping assembly 2 in this embodiment is mainly composed of a short-circuit rotary switch 21, a connecting rod 22, a first rotating plate 23, a contact member 26, a tripping member 27, a second rotating plate 24, and a third rotating plate 25. The housing 1 is provided with a first rotating column 101, the short-circuit rotary switch 21 is provided with a first rotating hole 211 for rotating connection to the first rotating column 101, and the short-circuit rotary switch 21 is provided with a first rotating hole 212. The housing 1 is provided with a second rotating column 102, and the first rotating plate 23 is provided with a second rotating hole 231 rotatably connected to the second rotating column 102. The first rotating plate 23 is provided with a first abutting part 232, and the housing 1 is provided with a first abutting platform 103, which is used to abut against the first abutting part 232 when the gate is opened; the first rotating plate 23 is provided with a third rotating column 233 and a fourth rotating column 234. The abutment member 26 is provided with a third rotating hole 261 for rotatably connecting to the third rotating column 233, and a second rotating hole 262 is provided on the abutment member 26; the abutment member 26 is provided with a second abutment part 263; The connecting rod 22 is provided with a first rotating post 221 and a second rotating post 222, and the first rotating post 221 and the second rotating post 222 are respectively rotatably connected to the first rotating hole 212 and the second rotating hole 262; The tripping component 27 is provided with a fourth rotating hole 271, which is rotatably connected to the fourth rotating column 234; the tripping component 27 is also provided with a third abutting part 272, which is used to abut against the second abutting part 263; the tripping component 27 is also provided with a trigger bar 273, which is located on the side of the movement direction of the short-circuit push rod 311 of the short-circuit coil 31 when the circuit is closed, and is used to push the trigger bar 273 when a short circuit occurs; The second rotating plate 24 and the third rotating plate 25 are respectively provided with a fifth rotating hole 241 and a sixth rotating hole 251. The fifth rotating hole 241 and the sixth rotating hole 251 are rotatably connected to the second rotating column 102. The second rotating plate 24 and the third rotating plate 25 are arranged in parallel. The second rotating plate 24 and the third rotating plate 25 are respectively provided with a concentric first positioning hole 242 and a second positioning hole 252. The first positioning hole 242 and the second positioning hole 252 are connected to the first positioning column 243. An extension plate 235 is provided on the first rotating plate 23, one end of which extends into the space between the second rotating plate 24 and the third rotating plate 25, and a second positioning post 236 is provided on the extension plate 235. A tension spring 237 is connected to the first positioning post 243 and the second positioning post 236; At this time, the trigger bar 273 of the tripping component 27 is located outside the short-circuit coil 31 and close to the short-circuit push rod 311. In the event of an abnormality, the short-circuit push rod 311 will move towards the trigger bar 273, thereby pushing the trigger bar 273 to move. Since the tripping component 27 is rotatably connected to the first rotating plate 23, the tripping component 27 will rotate at this time, causing the trigger bar 273 to move away from the short-circuit coil 31. As a result, the third contact part 272 and the second contact part 263 will trip. Under the action of the tension spring 237, the entire first rotating plate 27 will trip. The moving plate 23, the second rotating plate 24, and the third rotating plate 25 will rotate. Since the contact member 26 is connected to the first rotating plate 23, the contact member 26 will be displaced. Under the push of the connecting rod 22 lever arm, the short-circuit rotary switch 21 will rotate. At the same time, the rotation of the second rotating plate 24 and the third rotating plate 25 will cause the first moving contact 107 and the second moving contact 124 to rotate as well, thereby disengaging from the first fixed contact 106 and the second fixed contact 123 respectively, completing the entire tripping action.

[0022] The housing 1 includes a first passage and a second passage. The first passage includes a first connecting contact 104 and a second connecting contact 105. The short-circuit coil 31 has a short-circuit wound coil 312. The first passage also includes a first fixed contact 106. The second rotating plate 24 is provided with a first moving contact 107 for cooperating with the first fixed contact 106. One end of the short-circuit wound coil 312 is connected to the first connecting contact 104. The first passage is also provided with a deformation connecting plate 128. A first wire 108 is connected to the first moving contact 107 and is connected to the deformation connecting plate 128. The housing 1 also includes a magnetic ring 127. A second wire 125 passes through the magnetic ring 127. One end of the second wire 125 is connected to the deformation connecting plate 128 and the other end is connected to the second connecting contact 105.

[0023] The second passage includes a third contact 121 and a fourth contact 122. A second fixed contact 123 is provided in the second passage. A second moving contact 124 is provided on the third rotating plate 25 for cooperating with the second fixed contact 123. The second fixed contact 123 is connected to the third contact 121. A third wire 126 is provided on the second moving contact 124. The third wire 126 passes through the magnetic ring 127 and is connected to the fourth contact 122.

[0024] This forms a complete circuit. When the circuit is closed, the second contact part 263 on the contact member 26 abuts against the third contact part 272 on the tripping member 27, forming a limit. The current in the first circuit passes through the first connecting contact 104, the short-circuit winding coil 49312, the first fixed contact 106, the first moving contact 107, the first wire 108, the deformation connecting plate 128, the second wire 125, and the second connecting contact 105 to form a circuit. Similarly, the current in the second circuit passes through the third connecting contact 121, the second fixed contact 123, the second moving contact 124, the third wire 126, and the fourth connecting contact 122 to form a circuit.

[0025] The above structure is the most common prior art. This invention includes, but is not limited to, the above structure. This embodiment is only used as an example. In the prior art, the tripping component 2 is generally triggered by a trigger bar to trip. There are various types of tripping components 2. This embodiment only selects one for illustration and does not represent the inventive point of this invention.

[0026] The key feature of this embodiment is that an indicator component 5 is also provided inside the housing 1. The indicator component in this embodiment includes a reset component 52 and a return component 51 (i.e., a spring). An opening 109 is opened on the housing 1, through which one end of the reset component 52 protrudes. The reset component 52 has a limiting block 521. The limiting block 521 has an end post 4211 on the leakage current push rod 42 in this embodiment. The end post 4211 is cylindrical, and its diameter is larger than that of the leakage current push rod 42. The limiting block 521 is located below the end post 4211. In the normal closed state, one end of the reset component 52 does not protrude from the opening 109, and the limiting block 521 is located below the end post 4211. At this time, the limiting block 521 is abutted by the end post, thereby keeping the reset component 52 from protruding from the opening 109. When leakage occurs, after the leakage push rod 42 moves, the end post 4211 moves and disengages from the limiting block 521. Under the action of the return member 51, one end of the reset member 52 extends out of the opening 109. At the same time, the limiting block 521 abuts against the body of the leakage push rod 42. Since the limiting block 521 has already abutted against the leakage push rod 42, the leakage push rod 42 will be restricted by the limiting block 521 when it returns, making it impossible for the leakage push rod 42 to reset.

[0027] In this embodiment, the return element 51 is mainly a spring. A first mounting platform 111 is provided inside the housing 1, and a second mounting platform 522 is provided on the reset element 52. The two ends of the spring abut against the first mounting platform 111 and the second mounting platform 522, respectively. Under the action of the spring, after the leakage current push rod 42 moves, it can drive the reset element 51 to move, so that the limiting block 51 abuts against the body of the leakage current push rod 42.

[0028] In the normal closed state, the terminal post 4211 abuts against the limit block 521. When the leakage circuit is activated, the terminal post 4211 moves with the leakage push rod 42. Under the action of the return element 51, the limit block 521 abuts against the leakage push rod 42.

[0029] The housing 1 is provided with a sliding groove 110, and the reset member 52 is disposed in the sliding groove 110.

[0030] The specific working process of this embodiment is as follows: When a short circuit occurs, the short-circuit push rod 311 on the short-circuit coil 31 will move, thereby triggering the trip assembly 2 to trip. At this time, the short-circuit rotary switch 21 on the trip assembly 2 will rotate and trip. In this case, only the short-circuit rotary switch 21 trips when only a short circuit occurs, and the other components remain unchanged, thus only indicating a short circuit. To restore the circuit, simply rotate the short-circuit rotary switch 21.

[0031] When a leakage current occurs, the leakage current push rod 42 inside the leakage current coil 41 will move towards the short-circuit coil 31 and directly push the short-circuit push rod 311 on the short-circuit coil 31 to move, thereby triggering the tripping assembly 2 to trip. At this time, the short-circuit rotary switch 21 on the tripping assembly 2 will rotate and trip. At the same time as the leakage current push rod 42 moves, under the action of the spring, the reset member 52 will spring upward and extend out of the opening 109 on the housing 1. Under the continuous action of the spring, the reset member 52 will always extend out of the opening 109 on the housing 1, so that the limiting block 521 on the reset member 52 will continue to abut against the leakage current push rod 42. At the same time, because the leakage current push rod 42 is provided with end post 4211, the leakage current... When the push rod 42 is reset, it is restricted by the end post 4211. The end post 4211 cannot pass through the limit block 521, thus preventing the leakage push rod 42 from resetting. At this time, the leakage push rod 42 will also maintain the limit on the short-circuit push rod 311. Even if the short-circuit rotary switch 21 is rotated, the trigger bar 273 is also restricted by the short-circuit push rod 311 during the reset process, preventing the entire trip assembly 2 from resetting. External force is required to press down the reset piece 52, causing the limit block 521 to disengage from the leakage push rod 42, allowing the leakage push rod 42 to reset. The limit block 521 then re-engages with the end post 4211, and the reset piece 52 retracts into the opening 109. After the leakage push rod 42 resets, the short-circuit push rod 311 also resets. At this time, rotating the short-circuit rotary switch 21 resets the entire trip assembly 2. In this way, when leakage occurs, the short-circuit rotary switch 21 can be seen tripping, and the reset piece 52 can be seen extending out of the opening 109 of the housing 1.

[0032] This makes it easy to determine when the circuit breaker trips due to leakage. When a short circuit occurs, only the short-circuit rotary switch 21 trips. When a leakage occurs, the short-circuit rotary switch 21 trips, and the reset piece 52 extends out of the opening 109 of the housing 1.

[0033] Furthermore, this embodiment also provides a sliding groove 110 on the housing 1, in which the reset member 52 slides, thereby restricting the movement trajectory of the reset member 52, enabling it to move up and down, thus ensuring the stability of the stroke.

[0034] Example 2: Refer to Figure 10-11 The basic structure is the same as in Embodiment 1, except for the composition of the indicator component 5; The indicator component of this embodiment includes a return component 51, a reset component 52, and a rotating component 53. The rotating component 53 is rotatably connected inside the housing 1. One end of the rotating component 53 is provided with a limit buckle 531, and the other end of the rotating component 53 is located between the short-circuit push rod 311 and the leakage push rod 42. The reset component 52 is provided with a slot 523 for the limit buckle 531 to be inserted. The housing 1 is provided with an opening 109, and the reset component 52 extends into the housing 1 through the opening 109. There are various ways to make a rotating connection. This embodiment provides the most common rotating connection structure, that is, a hinge hole 532 is provided on the rotating part 53, and a rotating shaft 112 is provided on the housing 1. The hinge hole 532 is rotatably connected to the rotating shaft 112, so that the rotating part 53 is rotatably connected to the housing 1. In the normal closed state, the limit latch 531 on the rotating part 53 is inserted into the slot 523 on the reset part 52. When leakage occurs, the leakage push rod 42 pushes the rotating part 53 to rotate, and the limit latch 531 on the rotating part 53 disengages from the slot 523. Under the action of the reset part 52, the reset part 52 is displaced, and the limit latch 531 abuts against the reset part 52. The other end of the rotating part 53 pushes the short-circuit push rod 311, triggering the tripping assembly to release.

[0035] The return component 51 is a spring, and a first mounting platform 111 is provided inside the housing 1. A second mounting platform 522 is provided on the reset component 52, and the two ends of the spring abut against the first mounting platform 111 and the second mounting platform 522 respectively.

[0036] The housing 1 is provided with a sliding groove 110, and the reset member 52 is disposed in the sliding groove 110.

[0037] The specific working process of this embodiment is as follows: When a short circuit occurs, the working process is the same as in Example 1, except that the short-circuit rotary switch 21 trips. This example will not be described in detail.

[0038] The rotating component 53 is rotatably connected to the housing 1. When a leakage occurs, the leakage push rod 42 moves. Since one end of the rotating component 53 is located between the short-circuit push rod 311 and the leakage push rod 42, the movement of the leakage push rod 42 pushes the rotating component 53 to rotate. At the same time, one end of the rotating component 53 pushes the short-circuit push rod 311 to move, causing the short-circuit push rod 311 to trigger the tripping assembly to trip, and the short-circuit rotary switch 21 to trip. Simultaneously, when the rotating component 53 rotates, the limit latch 531 on the rotating component 53 will disengage from the slot 52 on the reset component 52. 3. Under the action of the spring, the reset piece 52 will pop out of the opening 109 of the housing 1, and the position on the reset piece 52 without the slot 523 will abut against the limit buckle 531, making the rotating piece 53 unable to reset, and also preventing the short-circuit push rod 311 from resetting. When reset is required, the reset piece 52 needs to be pressed so that the slot 523 on the reset piece 52 is aligned with the limit buckle 531. Under the action of the restoring force of the short-circuit push rod 311, the limit buckle 531 will be re-embedded in the slot 523, releasing the limit on the short-circuit push rod 311, so that reset can be achieved.

[0039] This makes it easy to determine when the circuit breaker trips due to leakage. When a short circuit occurs, only the short-circuit rotary switch 21 trips. When a leakage occurs, the short-circuit rotary switch 21 trips, and the reset piece 52 extends out of the opening 109 of the housing 1.

[0040] Furthermore, this embodiment also provides a sliding groove 110 on the housing 1, in which the reset member 52 slides, thereby restricting the movement trajectory of the reset member 52, enabling it to move up and down, thus ensuring the stability of the stroke. Example 3: Refer to Figure 12-15

[0041] The basic structure is the same as in Embodiment 1, except for the composition of the indicator component 5; The indicator component 5 includes a leakage current rotary switch 43, a rotating component 53, and a return component 51. In this embodiment, a limit buckle 531 is provided at one end of the rotating component 53, and a slot 523 is provided on the leakage current rotary switch 43. In the normal closed state, the limit buckle 531 on the rotating component 53 is embedded in the slot 523 of the leakage current rotary switch 43. The rotating component 53 is rotatably connected to the housing 1. There are various connection methods. In this embodiment, the most common structure is adopted. The rotating component 53 has a hinge hole 532, and the housing 1 has a rotating shaft 112. The hinge hole 532 is rotatably connected to the rotating shaft 112, so that the rotating component 53 is rotatably connected to the housing 1. The other end of the rotating part 53 is located between the short-circuit push rod 311 and the leakage push rod 42, and the return part 51 in this embodiment is a torsion spring 46. One end of the torsion spring 46 abuts against the first abutment 113 on the housing 1, and the other end abuts against the second abutment 47 on the leakage rotary switch 43. The torsion spring 46 is sleeved on the first rotating column 101 on the housing 1. The leakage current rotary switch 43 has a seventh rotating hole 431, which is rotatably connected to the first rotating column 101. Similarly, the first rotating hole 211 on the short-circuit rotary switch 21 is also rotatably connected to the first rotating column 101.

[0042] The short-circuit rotary switch 21 has a short-circuit handle 213, and the leakage current rotary switch 43 has a leakage current handle 44. The leakage current handle 44 is provided with a linkage 45 in the closing direction. When leakage occurs, the linkage 45 pushes the short-circuit handle 213. A boss 2131 is provided on the short-circuit handle 213 for linkage with the linkage 45.

[0043] The specific working process of this embodiment is as follows: In this embodiment, when a short circuit occurs, the working process is the same as in Embodiment 1 and Embodiment 2, except that the short-circuit rotary switch 21 trips. This embodiment will not be described in detail.

[0044] When a leakage current occurs, the leakage current push rod 42 moves. Since one end of the rotating part 53 is located between the short-circuit push rod 311 and the leakage current push rod 42, the movement of the leakage current push rod 42 pushes the rotating part 53 to rotate. At the same time, one end of the rotating part 53 pushes the short-circuit push rod 311 to move, causing the short-circuit push rod 311 to trigger the tripping assembly and the short-circuit rotary switch 21 to trip. Simultaneously, when the rotating part 53 rotates, the limit latch 531 on the rotating part 53 disengages from the slot 523 on the leakage current rotary switch 43, and the torsion spring 46... When the leakage current rotary switch 43 trips, the outer wall of the leakage current rotary switch 43 will remain in contact with the limit latch 531, preventing the rotating part 53 from resetting. At the same time, the short-circuit push rod 311 will also remain unable to reset. When a reset is required, the leakage current rotary switch 43 is first pushed back to its original position. At this time, under the action of the restoring force of the short-circuit push rod 311, the rotating part 53 will reset and re-embed into the slot 523 of the leakage current rotary switch 43. Then, the short-circuit rotary switch 21 is closed to complete the reset.

[0045] Simultaneously, due to the linkage 45, a short-circuit rotary switch 21 can also trip simultaneously with a leakage current trip. However, the leakage current rotary switch 43 will not trip during a short-circuit trip. This makes it clear when the leakage current tripped. Example 4: Refer to Figure 16-17

[0046] The basic structure is the same as in Embodiment 1, except for the composition of the indicator component 5; The indicator component 5 includes a reset component 52, a sliding latch component 54, and a return component 51. An opening 109 is provided on the housing 1, through which one end of the reset component 52 extends. In this embodiment, a limiting latch 531 is provided on the sliding latch component 54, and a slot 523 is provided on the reset component 52. In the normal closed state, the limiting latch 531 on the sliding latch component 54 is inserted into the slot 523 on the reset component 52. In this embodiment, the return component 51 is a spring, a first mounting platform 111 is provided inside the housing 1, and a second mounting platform 522 is provided on the reset component 52. The two ends of the spring abut against the first mounting platform 111 and the second mounting platform 522 respectively.

[0047] The sliding locking fastener 54 is slidably connected to the housing 1, and the sliding locking fastener 54 has a pusher 541 and a sliding part 543; The pusher 541 is located between the short-circuit push rod 311 and the leakage push rod 42; A sliding groove 57 is provided inside the housing 1, and the sliding part 543 is slidably connected in the sliding groove 57; The housing 1 is provided with a sliding groove 110, and the reset member 52 is disposed in the sliding groove 110.

[0048] When a short circuit occurs, the working process is the same as in Example 1, except that the short-circuit rotary switch 21 trips. This example will not be described in detail.

[0049] When a leakage current occurs, because the pusher 541 on the sliding lock 54 is located between the leakage current push rod 42 and the short-circuit push rod 311, the leakage current push rod 42 will push the pusher 541 on the sliding lock 54 to move, thereby moving the entire sliding lock 54. This causes the limit latch 531 to disengage from the slot 523 on the reset member 52. Under the action of the spring, the reset member 52 will extend out of the opening 109. At the same time, the movement of the pusher 541 will also push the short-circuit push rod 311 to move, thereby triggering the tripping assembly to trip. The short-circuit rotary switch 21 will trip, and the reset member 52 will not... The position of the slot 523 is set to abut against the limit buckle 531, preventing the sliding lock buckle 54 from resetting and also preventing the short-circuit push rod 311 from resetting. When resetting is required, the reset piece 52 needs to be pressed so that the slot 523 on the reset piece 52 aligns with the limit buckle 531. Under the restoring force of the short-circuit push rod 311, the pusher 541 will move. At the same time, due to the cooperation of the sliding part 543 on the sliding lock buckle 54 and the sliding groove 57 on the housing 1, the movement trajectory of the sliding lock buckle is restricted, causing the limit buckle 531 to re-embed in the slot 523, releasing the limit on the short-circuit push rod 311, thus achieving resetting.

[0050] This makes it easy to determine when the circuit breaker trips due to leakage. When a short circuit occurs, only the short-circuit rotary switch 21 trips. When a leakage occurs, the short-circuit rotary switch 21 trips, and the reset piece 52 extends out of the opening 109 of the housing 1.

[0051] Furthermore, this embodiment also provides a sliding groove 110 on the housing 1, in which the reset member 52 slides, thereby restricting the movement trajectory of the reset member 52, enabling it to move up and down, thus ensuring the stability of the stroke.

[0052] Example 5, refer to Figure 18-19 The embodiment is basically the same as that in embodiment four, except that in addition to the pusher 541 and the sliding part 543, the sliding lock fastener 54 is also provided with an abutting connection part 542. The housing 1 is provided with an abutting connecting platform 56. In this embodiment, the abutting connecting platform 56 is located at one end of the sliding groove 57 facing away from the sliding lock fastener 54. A compression spring 55 is provided between the abutting connecting platforms 56. One end of the compression spring 55 abuts against the abutting connecting platform 56, and the other end abuts against the abutting connecting part 542. By using the compression spring 55, the restoring force of the sliding lock fastener 54 is strengthened, allowing the sliding lock fastener 54 to return to its original position more quickly.

[0053] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker with leakage current indication and short-circuit protection, characterized in that: include: Housing (1), tripping assembly (2), short circuit protection assembly (3), leakage protection assembly (4); The tripping assembly (2), short-circuit protection assembly (3), and leakage protection assembly (4) are located inside the housing (1); The short-circuit protection component (3) includes a short-circuit coil (31), and a short-circuit push rod (311) is provided inside the short-circuit coil (31). When a short circuit occurs, the short-circuit push rod (311) triggers the tripping component to release. The leakage protection component (4) includes a leakage coil (41), and a leakage push rod (42) is provided on the leakage coil (41). When leakage occurs, the leakage push rod (42) directly or indirectly pushes the short-circuit push rod (311) to trigger the tripping component to release. It also includes an indicator component (5) for indicating the leakage state when leakage occurs and for limiting the short-circuit push rod (311) or the leakage push rod (42); The indicator component (5) further includes a response component (51), which is used to maintain the indicator component (5) in limiting the short-circuit push rod (311) or the leakage push rod (42). By resetting the indicator component (5), the limitation on the short-circuit push rod (311) or the leakage push rod (42) is released, so that the short-circuit push rod (311) or the leakage push rod (42) is reset.

2. A circuit breaker with leakage current indication and short-circuit protection according to claim 1, characterized in that: The indicator component (5) includes a reset component (52). An opening (109) is provided inside the housing (1). The reset component (52) extends into the housing (1) through the opening (109). A limit block (521) is provided on the reset component (52). The limit block (521) is located below the leakage current push rod (42). A limit mechanism is provided on the leakage current push rod (42). When leakage occurs, the limiting mechanism extends out of the short-circuit coil (31) along with the leakage push rod (42). The limiting block (521) is used to cooperate with the limiting mechanism (421) to limit the leakage push rod (42). The return piece (51) is used to embed the limiting block (521) into the limiting mechanism.

3. A circuit breaker with leakage current indication and short-circuit protection according to claim 2, characterized in that: The limiting mechanism includes an end post (4211) disposed on the leakage current push rod (42), the end post (4211) being located outside the leakage current coil (41), and the width of the end post (4211) in the longitudinal direction being greater than the diameter of the leakage current push rod (42); In the normal closed state, the end post (4211) abuts against the limit block (521). When the leakage circuit is activated, the end post (4211) moves with the leakage push rod (42). Under the action of the return element (51), the limit block (521) abuts against the leakage push rod (42).

4. A circuit breaker with leakage current indication and short-circuit protection according to claim 2, characterized in that: The housing (1) is provided with a sliding groove (110), and the reset member (52) is provided in the sliding groove (110).

5. A circuit breaker with leakage current indication and short-circuit protection according to claim 1, characterized in that: The indicator component (5) includes a reset component (52) and a rotating component (53). The rotating component (53) is rotatably connected inside the housing (1). One end of the rotating component (53) is provided with a limit buckle (531), and the other end of the rotating component (53) is located between the short-circuit push rod (311) and the leakage push rod (42). The reset component (52) is provided with a slot (523) for the limit buckle (531) to be inserted. The housing (1) is provided with an opening (109), and the reset component (52) extends into the housing (1) through the opening (109). In the normal closed state, the limit buckle (531) on the rotating part (53) is inserted into the slot (523) on the reset part (52). When leakage occurs, the leakage push rod (42) pushes the rotating part (53) to rotate, and the limit buckle (531) on the rotating part (53) disengages from the slot (523). Under the action of the return part (51), the reset part (52) is displaced, and the limit buckle (531) abuts against the reset part (52). The other end of the rotating part (53) pushes the short-circuit push rod (311) to trigger the trip assembly to release.

6. A circuit breaker with leakage current indication and short-circuit protection according to claim 1, characterized in that: The indicator component (5) includes a reset component (52) and a sliding latch component (54). An opening (109) is provided inside the housing (1). The reset component (52) extends into the housing (1) through the opening (109). A limit buckle (531) is provided on the sliding latch component (54). A slot (523) for the limit buckle (531) to be inserted is provided on the reset component (52). The sliding latch component (54) is slidably connected to the housing (1). A pusher (541) is provided on the sliding latch component (54). The pusher (541) is located between the short-circuit push rod (311) and the leakage push rod (42). In the normal closed state, the limit latch (531) on the sliding latch (54) is inserted into the slot (523) on the reset component (52). When leakage occurs, the leakage push rod (42) pushes the push component (541) to move, and the limit latch (531) on the sliding latch (54) disengages from the slot (523). Under the action of the return component (51), the reset component (52) is displaced, and the limit latch (531) abuts against the reset component (52). The push component (541) pushes the short-circuit push rod (311) to trigger the trip assembly to release.

7. A circuit breaker with leakage current indication and short-circuit protection according to claim 6, characterized in that: A compression spring (55) is provided on the housing (1). The compression spring (55) keeps the sliding lock (54) moving toward the reset member (52). An abutting connecting platform (56) is provided inside the housing (1). An abutting connecting part (542) is provided on the sliding lock (54). One end of the compression spring (55) abuts against the abutting connecting platform (56), and the other end abuts against the abutting connecting part (542).

8. A circuit breaker with leakage current indication and short-circuit protection according to claim 6, characterized in that: The housing (1) is provided with a sliding groove (57), and the sliding lock fastener (54) is provided with a sliding part (543), which is slidably connected in the sliding groove (57).

9. A circuit breaker with leakage current indication and short-circuit protection according to claim 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that: The return component (51) is a spring. A first mounting platform (111) is provided inside the housing (1). A second mounting platform (522) is provided on the reset component (52). The two ends of the spring abut against the first mounting platform (111) and the second mounting platform (522) respectively.

10. A circuit breaker with leakage current indication and short-circuit protection according to claim 1, characterized in that: The indicator component (5) includes a leakage current rotary switch (43) and a rotating component (53). One end of the rotating component (53) is provided with a limit buckle (531), and the other end of the rotating component (53) is located between the short circuit push rod (311) and the leakage current push rod (42). The leakage current rotary switch (43) is provided with a slot (523) for the limit buckle (531) to be inserted. In the normal closed state, the limit buckle (531) on the rotating part (53) is embedded in the slot (523) of the leakage current rotary switch (43). When leakage occurs, the leakage current push rod (42) pushes the rotating part (53) to rotate, and the limit buckle (531) on the rotating part (53) disengages from the slot (523). Under the action of the return part (51), the rotary switch rotates, and the limit buckle (531) abuts against the leakage current rotary switch (43). The other end of the rotating part (53) pushes the short-circuit push rod (311) to trigger the tripping assembly to release.

11. A circuit breaker with leakage current indication and short-circuit protection according to claim 10, characterized in that: The recovery component (51) is a torsion spring (46), one end of which is connected to the housing (1) and the other end is connected to the leakage current rotary switch (43).

12. A circuit breaker with leakage current indication and short-circuit protection according to claim 10, characterized in that: The tripping assembly (2) includes a short-circuit rotary switch (21), which opens when a short circuit occurs. The short-circuit rotary switch (21) has a short-circuit handle (213), and the leakage rotary switch (43) has a leakage handle (44). The leakage handle (44) is provided with a linkage (45) in the closing direction. When a leakage occurs, the linkage (45) pushes the short-circuit handle (213).

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