circuit breaker

Abstract

This application discloses a circuit breaker, relating to the field of low-voltage electrical equipment technology. The circuit breaker includes a trip unit assembly, which comprises a trip unit push rod, a first electromagnetic drive module, a second electromagnetic drive module, and a leakage current indication module. When the trip unit push rod is in the extended state, it actuates the moving contact to open the circuit. The first and second electromagnetic drive modules are connected to the trip unit push rod. During a short circuit, the first electromagnetic drive module generates a first magnetic force, which drives the trip unit push rod to open. During a leakage current event, the second electromagnetic drive module generates a second magnetic force, which drives the trip unit push rod to open and moves the leakage current indication module to the indicating position. This solution adds a leakage current indication module to the trip unit and utilizes the action of the second electromagnetic drive module during leakage current protection to move the leakage current indication module to the indicating position, allowing the user to promptly know whether the circuit breaker tripping action is caused by a leakage current fault.

Description

Technical Field

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

[0002] A circuit breaker is a switching device used in a power distribution system for control and protection. When a short circuit or leakage occurs in the circuit where the circuit breaker is located, the circuit breaker can detect the abnormal current in the circuit and then automatically trigger the trip operation through the trip unit to quickly cut off the power supply. This can prevent safety accidents caused by abnormal current and ensure personal safety.

[0003] However, existing circuit breakers cannot intuitively indicate to users the specific fault type that caused the tripping after triggering the tripping protection. Users find it difficult to determine whether the tripping protection action was caused by a leakage fault or other faults, which makes it difficult to quickly diagnose the cause of the line fault and carry out maintenance. Summary of the Invention

[0004] The main purpose of this application is to propose a circuit breaker that addresses the technical problem that existing circuit breakers cannot intuitively indicate the specific fault type to users after triggering trip protection, thus hindering the rapid diagnosis of line faults and the implementation of maintenance.

[0005] To achieve the above objectives, the circuit breaker proposed in this application includes a trip unit assembly, the trip unit assembly comprising:

[0006] The trip unit push rod is used to actuate the moving contacts to open the circuit breaker when it is in the pushed-out state. A first electromagnetic drive module is connected to the trip unit push rod; The second electromagnetic drive module is connected to the trip unit push rod; A leakage current indicator module, wherein the leakage current indicator module is connected to the second electromagnetic drive module; The first electromagnetic drive module generates a first magnetic force in response to the current under short-circuit conditions, and the first magnetic force is used to drive the trip unit push rod to push out. The second electromagnetic drive module generates a second magnetic force in response to the current under leakage conditions. The second magnetic force is used to drive the trip unit push rod to push out, and the second magnetic force is used to drive the leakage indicator module to move to the indicator position.

[0007] In one embodiment, the first electromagnetic drive module includes a magnetic coil, a short-circuited moving iron core, and a stationary iron core; the second electromagnetic drive module includes a leakage coil, a leakage moving iron core, and the stationary iron core. The magnetic coil generates the first magnetic force under short-circuit current, and the first magnetic force is used to drive the short-circuited moving iron core to approach the stationary iron core; the short-circuited moving iron core drives the trip unit push rod to extend during the process of approaching the stationary iron core; The leakage coil is energized in the leakage state and generates the second magnetic force, which drives the leakage electromagnet to approach the stationary core. As the leakage electromagnet approaches the stationary core, it causes the trip unit push rod to extend, and as the leakage electromagnet approaches the stationary core, it causes the leakage indicator module to move to the indicated position.

[0008] In one embodiment, the trip unit push rod is slidably fitted onto the stationary iron core; the trip unit push rod has a first rod end and a second rod end, the first rod end being used to drive the moving contact to open the circuit in the pushed-out state, the leakage current electro-electrode core abutting against the second rod end, the short-circuit moving iron core being fixed on the trip unit push rod, and the short-circuit moving iron core being located between the stationary iron core and the leakage current electro-electrode core; the leakage current indicator module is movably disposed between the short-circuit moving iron core and the leakage current electro-electrode core; The first magnetic force is used to drive the short-circuited moving iron core to approach the stationary iron core along the first direction, so as to drive the second rod end to separate from the leakage electric iron core through the short-circuited moving iron core, and drive the first rod end to push out through the short-circuited moving iron core; The second magnetic force is used to drive the leakage electric core to approach the stationary core along the first direction, so as to push the first rod end out through the leakage electric core, and to push the leakage indicator module to the indicated position through the leakage electric core.

[0009] In one embodiment, the trip unit assembly further includes a trip unit frame, which is configured as a cylindrical structure; the trip unit push rod, the stationary iron core, the short-circuit moving iron core, and the leakage current electric iron core are disposed in the inner cavity of the trip unit frame; the magnetic coil is disposed on the outer periphery of the trip unit frame and surrounds the short-circuit moving iron core, and the leakage current coil is disposed on the outer periphery of the trip unit frame and surrounds the leakage current electric iron core; The trip unit frame is provided with a clearance opening communicating with the inner cavity; the leakage current indicator module has an actuation part, which passes through the clearance opening and extends inward to the space between the short-circuit moving iron core and the leakage current moving iron core; the leakage current moving iron core is used to push the actuation part under the second magnetic force to drive the leakage current indicator module to the indicated position.

[0010] In one embodiment, the trip unit assembly further includes a first elastic element connected to the stationary iron core and the short-circuit moving iron core. The elastic force provided by the first elastic element is used to drive the short-circuit moving iron core away from the stationary iron core in a second direction; the second direction is opposite to the first direction.

[0011] In one embodiment, the circuit breaker further includes a housing, and the trip unit assembly is disposed within the cavity of the housing; The leakage current indicator module includes an indicator, an actuating latch, and a second elastic element; the indicator is slidably fitted onto the housing; the second elastic element is connected to the housing and the indicator, and the elastic force provided by the second elastic element is used to drive the indicator to extend out of the housing; The actuation latch abuts against the indicator to prevent the indicator from extending out of the housing; the actuation latch has an actuation part disposed between the short-circuit moving iron core and the leakage electric iron core; the leakage electric iron core is used to push the actuation part under the second magnetic force to drive the actuation latch to separate from the indicator.

[0012] In one embodiment, the indicator is slidably fitted onto the housing along a third direction; the indicator is provided with a limiting groove that extends along a second direction; the second direction is opposite to the first direction, and the third direction is perpendicular to both the first and second directions; The actuation latch has a latching part; the latching part is engaged in the limiting groove to prevent the indicator from sliding along the third direction; The leakage electric core is used to push the actuating part under the second magnetic force, so as to drive the latching part to disengage from the limiting groove along the first direction.

[0013] In one embodiment, the leakage current indication module further includes a third elastic element, which is connected to the housing and the actuation latch. The elastic force provided by the third elastic element is used to drive the actuation latch to move along the second direction.

[0014] In one embodiment, the end of the latching portion has a guide structure, the width of which gradually decreases along the second direction in the third direction.

[0015] In one embodiment, the circuit breaker further includes a housing, and the trip unit assembly is disposed within the cavity of the housing; The leakage current indicator module includes an indicator, an actuating latch, and a second elastic element; the indicator is slidably fitted onto the housing; the second elastic element is connected to the housing and the indicator, and the elastic force provided by the second elastic element is used to drive the indicator to extend out of the housing; The actuating latch abuts against the indicator to prevent the indicator from extending out of the housing; the actuating latch is used to move away from the indicator under the drive of the second magnetic force.

[0016] In one embodiment, the indicator is slidably fitted onto the housing in a third direction; the indicator is provided with a limiting groove that extends in a second direction; The actuation latch has a latching part; the latching part is engaged in the limiting groove to prevent the indicator from sliding along the third direction; The actuating latch is used to move along a first direction under the drive of the second magnetic force, so as to drive the latch part to disengage from the limiting groove; the first direction is opposite to the second direction, and the third direction is perpendicular to the first direction and the second direction.

[0017] In one embodiment, the leakage current indication module further includes a third elastic element, which is connected to the housing and the actuation latch. The elastic force provided by the third elastic element is used to drive the actuation latch to move along the second direction.

[0018] In one embodiment, the end of the latching portion has a guide structure, the width of which gradually decreases along the second direction in the third direction.

[0019] In one embodiment, the circuit breaker further includes a handle and a multi-link mechanism. The handle is connected to the moving contact via the multi-link mechanism. During the opening process, the moving contact drives the handle to rotate to the open position via the multi-link mechanism. During the process of the handle rotating from the open position to the closed position, the moving contact is driven to close via the multi-link mechanism. When the trip unit push rod drives the moving contact to open under the second magnetic force, the leakage current indicator module, which moves to the indicated position, is used to prevent the handle from rotating to the open position, so as to disconnect the transmission chain of the multi-link mechanism and thereby release the transmission connection between the handle and the moving contact.

[0020] In one embodiment, the multi-link mechanism includes a first link mechanism and a second link mechanism; one end of the first link mechanism is throttle-connected to the handle, and the other end of the first link mechanism is provided with a jump-lock structure; one end of the second link mechanism is throttle-connected to the moving contact, and the other end of the second link mechanism is provided with a snap-lock structure. The trip latch structure is movably attached to the latch structure; when the handle is blocked by the leakage current indicator module during the process of rotating to the open position, the first linkage mechanism stops moving, and the second linkage mechanism continues to move with the moving contact to separate the latch structure from the trip latch structure, thereby cutting off the transmission connection between the first linkage mechanism and the second linkage mechanism.

[0021] In one embodiment, when the handle is blocked by the leakage current indicator module, and the handle rotates to the open position by overcoming the reset pressure of the leakage current indicator module, the handle drives the tripping structure to engage with the latching structure through the first linkage mechanism.

[0022] The circuit breaker proposed in this application connects a first electromagnetic drive module, a second electromagnetic drive module, and a trip unit push rod, and establishes a drive connection between the second electromagnetic drive module and a leakage current indicator module. When a short-circuit fault occurs in the circuit breaker, the first electromagnetic drive module responds to the current under the short-circuit condition and drives the trip unit push rod to extend, thereby realizing the tripping protection caused by the short-circuit fault without changing the position of the leakage current indicator module. This allows the user to intuitively determine whether the tripping action is caused by the short-circuit fault based on the status of the leakage current indicator module. When a leakage current fault occurs in the circuit breaker, the second electromagnetic drive module responds to the current under the leakage condition and drives the trip unit push rod to extend and drives the leakage current indicator module to move to the indicating position, thereby realizing the tripping protection caused by the leakage current fault. This also allows the user to intuitively determine whether the tripping action is caused by the leakage current fault based on the status of the leakage current indicator module.

[0023] Based on the above solution, a single trip unit rod can be used to achieve the circuit breaker's tripping protection function, thus simplifying the internal structure of the trip unit assembly. It eliminates the need for separate trip units for short-circuit protection and leakage protection, which is more conducive to miniaturization and cost control of the circuit breaker. Furthermore, a clear indication function for leakage faults is added to the relatively simple structure, allowing users to promptly identify whether a leakage fault has occurred after the circuit breaker trips. This provides a clear direction for subsequent line troubleshooting and maintenance, avoiding misjudgments or delays due to unclear fault types, thereby improving the ease of use and safety of the circuit breaker product. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the circuit breaker provided in this application; Figure 2 A schematic cross-sectional view of the circuit breaker in the closed state in one embodiment of the circuit breaker provided in this application; Figure 3 for Figure 2 A partial structural diagram; Figure 4 A schematic diagram of the internal structure of the circuit breaker provided in this application when it is in the closed state; Figure 5 A cross-sectional structural schematic diagram of the circuit breaker provided in this application when the tripping action is triggered by a short-circuit fault in one embodiment of the circuit breaker; Figure 6 for Figure 5 A partial structural diagram; Figure 7 A schematic diagram of the internal structure of the circuit breaker provided in this application when a short-circuit fault triggers a tripping action; Figure 8 A cross-sectional structural schematic diagram of the circuit breaker provided in this application when the tripping action is triggered by a leakage fault in one embodiment of the circuit breaker; Figure 9 for Figure 8 A partial structural diagram; Figure 10 A schematic diagram of the internal structure of the circuit breaker provided in this application when the tripping action is triggered by a leakage fault in one embodiment of the circuit breaker; Figure 11 This is a schematic diagram of the actuation latch in one embodiment of the circuit breaker provided in this application.

[0026] Explanation of icon numbers: 1. Trip unit assembly; 11. Trip unit push rod; 12. First electromagnetic drive module; 13. Second electromagnetic drive module; 14. Leakage current indicator module; 15. Trip unit frame; 16. First elastic element; 17. Static iron core; 111. First rod end; 112. Second rod end; 121. Magnetic coil; 122. Short-circuit moving iron core; 131. Leakage coil; 132. Leakage moving iron core; 141. Indicator; 142. Actuation latch; 143. Second elastic element; 144. Third elastic element; 151. Clearance opening; 152. Flange structure; 1411, Limiting groove; 1421, Actuating part; 1422, Buckling part; 14221, First structural segment; 14222, Second structural segment; 14223, Guide structure; 2. Moving contact; 3. Stationary contact; 4. Housing; 5. Handle; 6. Multi-link mechanism; 61. First linkage mechanism; 62. Second linkage mechanism; 611. Jump-button structure; 621. Snap-button structure.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] A circuit breaker is a switching device used in a power distribution system for control and protection. When a short circuit or leakage occurs in the circuit where the circuit breaker is located, the circuit breaker can detect the abnormal current in the circuit and then automatically trigger the trip operation through the trip unit to quickly cut off the power supply. This can prevent safety accidents caused by abnormal current and ensure personal safety.

[0032] However, existing circuit breakers cannot intuitively indicate to users the specific fault type that caused the tripping after triggering the tripping protection. Users find it difficult to determine whether the tripping protection action was caused by a leakage fault or other faults, which makes it difficult to quickly diagnose the cause of the line fault and carry out maintenance.

[0033] Based on the above problems, this application proposes a circuit breaker that adds a leakage current indication module to the trip unit, and uses the action of related components in the trip unit during leakage current protection to drive the leakage current indication module to the indication position, so that the user can know in time whether the circuit breaker trips due to leakage current fault.

[0034] Please see Figures 1 to 10 One embodiment of this application provides a circuit breaker including a trip unit assembly 1, which includes: The trip unit push rod 11 is used to drive the moving contact 2 to open when it is in the pushed-out state; The first electromagnetic drive module 12 is connected to the trip unit push rod 11; The second electromagnetic drive module 13 is connected to the trip unit push rod 11; Leakage current indicator module 14 is connected to the second electromagnetic drive module 13; The first electromagnetic drive module 12 generates a first magnetic force in response to the current under short-circuit conditions. The first magnetic force is used to drive the trip unit push rod 11 to push out. The second electromagnetic drive module 13 generates a second magnetic force in response to the current under leakage conditions. The second magnetic force is used to drive the trip unit push rod 11 to push out, and the second magnetic force is used to drive the leakage indicator module 14 to move to the indicator position.

[0035] In this embodiment, the trip unit assembly 1 is the core component of the circuit breaker for fault detection and triggering tripping. The trip unit assembly 1 includes a trip unit push rod 11; the trip unit push rod 11 is a movable rod-shaped component with an extended state and a retracted state. When the trip unit push rod 11 is in the extended state, it extends outward and pushes the moving contact 2 to separate from the stationary contact 3, thereby achieving the tripping operation and cutting off the circuit. When the trip unit push rod 11 is in the retracted state, it allows the moving contact 2 to contact the stationary contact 3 during the closing operation, thus making the circuit conductive.

[0036] To drive the trip unit push rod 11, the trip unit assembly 1 also includes a first electromagnetic drive module 12 and a second electromagnetic drive module 13. Both the first electromagnetic drive module 12 and the second electromagnetic drive module 13 are connected to the same trip unit push rod 11. Specifically, the connection between the first electromagnetic drive module 12, the second electromagnetic drive module 13 and the trip unit push rod 11 can be through direct physical contact, such as by having the movable part of the electromagnetic drive module abut against the trip unit push rod 11; or it can be indirectly connected, for example, through an intermediate transmission component. In practical applications, regardless of whether a direct or indirect connection is used, the purpose is to transmit the driving force generated by the electromagnetic drive module to the trip unit push rod 11 to actuate it.

[0037] The first electromagnetic drive module 12 is configured to respond to short-circuit current in the circuit. Specifically, such as Figures 5 to 7 As shown, when a short circuit fault occurs in the circuit, a huge instantaneous current will be generated. When this instantaneous current flows through the first electromagnetic drive module 12, a magnetic field will be generated near the first electromagnetic drive module 12 based on the magnetic effect of the current. The first magnetic force provided by this magnetic field can drive the movable part in the first electromagnetic drive module 12 to move. Thus, the movable part can drive the trip unit push rod 11 to switch from the retracted state to the ejected state, so that the ejected trip unit push rod 11 can push the moving contact 2 to open, thereby realizing the trip protection caused by the short circuit fault.

[0038] The second electromagnetic drive module 13 is configured to respond to leakage current in the circuit. Specifically, such as Figures 8 to 10As shown, the circuit generates leakage current when leakage occurs. Due to the presence of this leakage current, the balance state of the vector sum of the current flowing through the zero-sequence transformer, which is zero, is disrupted. After detecting this abnormal current, the zero-sequence transformer will trigger the corresponding circuit module on the control circuit board to energize the second electromagnetic drive module 13. The energized second electromagnetic drive module 13 will generate a magnetic field based on the magnetic effect of the current. The second magnetic force provided by this magnetic field can drive the movable part in the second electromagnetic drive module 13 to move, thereby driving the trip unit push rod 11 from the retracted state to the ejected state through the movable part, so as to push the moving contact 2 to open through the ejected trip unit push rod 11, thereby realizing the trip protection caused by short circuit fault.

[0039] It can be seen that regardless of whether a short circuit or leakage fault occurs in the circuit where the circuit breaker is located, the trip protection can ultimately be achieved by driving the same trip unit push rod 11. This simplifies the internal structure of the trip unit assembly 1, eliminating the need to set separate trip push rods for short circuit protection and leakage protection functions. This is more conducive to miniaturization and cost control of the circuit breaker.

[0040] Furthermore, in this embodiment, the second electromagnetic drive module 13 is also configured to be simultaneously connected to the leakage current indication module 14. Specifically, the leakage current indication module 14 is a component used to provide visual indication to the outside world; for example, the leakage current indication module 14 can be configured as a slider, pin, column, or other component with highly recognizable color markings. Figures 8 to 10 As shown, when the second electromagnetic drive module 13 generates a second magnetic force in the leakage state, the second magnetic force not only drives the trip unit push rod 11 to push out, but also synchronously drives the leakage indicator module 14 to move from the initial position to the preset indicator position.

[0041] Regarding the driving effect of the second magnetic force on the leakage current indicator module 14, in one embodiment, when the movable part in the second electromagnetic drive module 13 moves under the second magnetic force, the leakage current indicator module 14 can be directly pushed to the indicated position by the movement of the movable part. In another embodiment, when the movable part in the second electromagnetic drive module 13 moves under the second magnetic force, a constrained elastic element can be indirectly released by the movement of the movable part, so that the elastic force provided by the elastic element can drive the leakage current indicator module 14 to the indicated position. In practical applications, it is only necessary to ensure that the movement of the leakage current indicator module 14 is caused by the second magnetic force generated by the second electromagnetic drive module 13 in response to the leakage current. This embodiment does not limit the specific driving method.

[0042] like Figures 8 to 10As shown, when the leakage current indicator module 14 moves to the preset indicator position, such as when the leakage current indicator module 14 protrudes from the surface of the circuit breaker housing 4 or moves to the preset position inside the circuit breaker, the user can directly observe or observe the state change of the indicator module through the observation window on the housing 4, thus intuitively knowing that the tripping action is caused by a leakage current fault. However, if the circuit breaker triggers the tripping action due to a short circuit fault, the second electromagnetic drive module 13 will not operate, and the leakage current indicator module 14 will remain in the initial position. At this time, the user can determine that the tripping action is caused by a short circuit fault.

[0043] Therefore, the circuit breaker provided in this embodiment connects the first electromagnetic drive module 12, the second electromagnetic drive module 13, and the trip unit push rod 11, and establishes a drive connection between the second electromagnetic drive module 13 and the leakage current indication module 14. When a short circuit fault occurs in the circuit breaker, the first electromagnetic drive module 12 responds to the current under the short circuit state and drives the trip unit push rod 11 to push out, thereby realizing the trip protection caused by the short circuit fault without changing the position of the leakage current indication module 14. This allows the user to intuitively judge that the trip action is caused by the short circuit fault based on the state of the leakage current indication module 14. When a leakage fault occurs in the circuit breaker, the second electromagnetic drive module 13 responds to the current under the leakage state and drives the trip unit push rod 11 to push out and drives the leakage current indication module 14 to move to the indication position, thereby realizing the trip protection caused by the leakage fault and changing the position of the leakage current indication module 14. This allows the user to intuitively judge that the trip action is caused by the leakage fault based on the state of the leakage current indication module 14.

[0044] Based on the above scheme, a single trip unit push rod 11 can be used to realize the circuit breaker's tripping protection function, thereby simplifying the internal structure of the trip unit assembly 1. It eliminates the need for separate trip units to realize short-circuit protection and leakage protection functions, which is more conducive to miniaturization and cost control of the circuit breaker. Furthermore, a relatively simple structure is added with an intuitive indication function for leakage faults, allowing users to promptly know whether a leakage fault has occurred after the circuit breaker triggers its tripping action. This provides a clear direction for subsequent line troubleshooting and maintenance, avoiding misjudgments or delays caused by unclear fault types, and thus improving the ease of use and safety of the circuit breaker product.

[0045] In one embodiment, refer to Figures 1 to 10 The first electromagnetic drive module 12 includes a magnetic coil 121, a short-circuited moving iron core 122, and a stationary iron core 17; the second electromagnetic drive module 13 includes a leakage coil 131, a leakage moving iron core 132, and a stationary iron core 17. The magnetic coil 121 generates a first magnetic force under short-circuit current, which drives the short-circuited moving iron core 122 to approach the stationary iron core 17; the short-circuited moving iron core 122 drives the trip unit push rod 11 to extend during the process of approaching the stationary iron core 17. When the leakage current coil 131 is in a leakage state, it is energized and generates a second magnetic force. The second magnetic force is used to drive the leakage current electric core 132 to approach the stationary core 17. As the leakage current electric core 132 approaches the stationary core 17, it drives the trip unit push rod 11 to extend, and as the leakage current electric core 132 approaches the stationary core 17, it drives the leakage current indicator module 14 to move to the indicator position.

[0046] In this embodiment, the magnetic coil 121 can be directly connected to the phase line of the circuit corresponding to the circuit breaker; such as Figures 5 to 7 As shown, when a short circuit fault occurs in this circuit, a huge short circuit current flows directly through the magnetic coil 121, causing a magnetic field to be generated around the magnetic coil 121. This magnetic field acts on the short-circuited moving iron core 122 and the stationary iron core 17 to generate a first magnetic force. The first magnetic force can cause the short-circuited moving iron core 122 and the stationary iron core 17 to attract each other, thereby driving the short-circuited moving iron core 122 to move towards the fixed stationary iron core 17. During the movement, the short-circuited moving iron core 122 will drive the trip unit push rod 11 to move, causing the trip unit push rod 11 to switch from the retracted state to the extended state, thereby pushing the moving contact 2 to complete the tripping operation.

[0047] The leakage current coil 131 can be electrically connected to the control circuit board, which also has a zero-sequence current transformer connected to it. For example... Figures 8 to 10 As shown, when a leakage fault occurs in the circuit, the zero-sequence transformer can trigger the corresponding circuit module on the control circuit board after detecting the leakage signal, thereby energizing the leakage coil 131. The energized leakage coil 131 will generate a magnetic field, which acts on the leakage current energized core 132 and the stationary core 17 to generate a second magnetic force. This second magnetic force causes the leakage current energized core 132 and the stationary core 17 to attract each other, thus driving the leakage current energized core 132 to move towards the fixed stationary core 17. During this movement, the leakage current energized core 132 will move the trip unit push rod 11, switching it from a retracted state to an extended state, thereby pushing the moving contact 2 to complete the tripping operation. Simultaneously, during this movement, the leakage current energized core 132 will move the leakage current indicator module 14 from its initial position to a preset indicator position.

[0048] Based on the above configuration, the short-circuit protection function and leakage protection function of the circuit breaker can be structurally distinguished. The magnetic coil 121 and the short-circuit moving iron core 122 are responsible for the tripping trigger function under the short-circuit protection state, while the leakage coil 131 and the leakage moving iron core 132 are responsible for the tripping trigger function and leakage indication function under the leakage protection state. At the same time, the two electromagnetic drive modules share the same stationary iron core 17 and the same trip unit push rod 11. This structural layout can reduce the number of parts of the trip unit assembly 1, simplify the assembly process, and reduce the overall volume of the trip unit assembly 1, which is conducive to realizing the miniaturization design of the circuit breaker.

[0049] In one embodiment, refer to Figures 1 to 10 The trip unit push rod 11 is slidably fitted onto the stationary iron core 17; the trip unit push rod 11 has a first rod end 111 and a second rod end 112. The first rod end 111 is used to drive the moving contact 2 to open the circuit in the pushed-out state. The leakage current electric core 132 abuts against the second rod end 112. The short-circuit moving iron core 122 is fixed on the trip unit push rod 11 and is located between the stationary iron core 17 and the leakage current electric core 132; the leakage current indicator module 14 is movably disposed between the short-circuit moving iron core 122 and the leakage current electric core 132. The first magnetic force is used to drive the short-circuited moving iron core 122 to approach the stationary iron core 17 along the first direction, so that the short-circuited moving iron core 122 drives the second rod end 112 to separate from the leakage electric iron core 132, and the short-circuited moving iron core 122 drives the first rod end 111 to be pushed out. The second magnetic force is used to drive the leakage current electric core 132 to approach the stationary core 17 along the first direction, so as to push the first rod end 111 out through the leakage current electric core 132, and push the leakage current indicator module 14 to the indicator position through the leakage current electric core 132.

[0050] To facilitate the explanation of the solution in this embodiment and subsequent solutions, the following is established: Figures 1 to 10 The coordinate system shown is used as a reference for the description of directionality in this embodiment and subsequent embodiments, and will not be repeated here.

[0051] In this embodiment, the stationary iron core 17 can be configured as a hollow cylindrical structure, and the inner cavity of the stationary iron core 17 can be arranged through the X-axis. The tripping rod 11 can be slidably inserted into the inner cavity of the stationary iron core 17 along the X-axis, and the first rod end 111 of the tripping rod 11 is arranged facing the moving contact 2.

[0052] The short-circuit moving iron core 122 is fixed to the middle of the trip unit push rod 11. Specifically, the short-circuit moving iron core 122 can be fixedly installed on the trip unit push rod 11 by means of snap-fit, welding, threaded connection, etc.; the short-circuit moving iron core 122 can also have a through hole structure extending along the X-axis, and the trip unit push rod 11 can be inserted into the through hole structure by interference fit to realize the fixation between the trip unit push rod 11 and the short-circuit moving iron core 122.

[0053] The leakage electric core 132 can be located on the side of the trip unit push rod 11 away from the moving contact 2, and the leakage electric core 132 abuts against the second rod end 112 of the trip unit push rod 11. The leakage electric core 132, the short-circuit moving core 122, and the stationary core 17 are arranged sequentially along the positive X-axis (i.e., the first direction).

[0054] At least a portion of the structure of the leakage current indication module 14 extends into the gap region between the short-circuit moving iron core 122 and the leakage moving iron core 132; such as Figures 8 to 10 As shown, when the leakage current electric core 132 moves along the positive X-axis (i.e., the first direction) and comes into contact with this part of the leakage current indicator module 14, the leakage current electric core 132 can directly drive the leakage current indicator module 14 to move synchronously along the positive X-axis (i.e., the first direction). In some specific embodiments, the leakage current electric core 132 and this part of the leakage current indicator module 14 can also adopt a wedge-shaped fit or be provided with a corresponding transmission structure, so as to use the movement of the leakage current electric core 132 along the first direction to drive the leakage current indicator module 14 to move in other directions different from the first direction.

[0055] Based on the above structural configuration, the operation process of the first electromagnetic drive module 12 and the second electromagnetic drive module 13 in this embodiment is as follows: The circuit breaker is in the initial state as follows Figures 2 to 4 The closed state is shown. For example... Figures 5 to 7 As shown, when a short circuit fault occurs in the circuit, the magnetic coil 121 generates a first magnetic force, which drives the short-circuit moving iron core 122 to approach the stationary iron core 17 along the positive X-axis (i.e., the first direction). Since the short-circuit moving iron core 122 is fixed on the trip unit push rod 11, the short-circuit moving iron core 122 will drive the entire trip unit push rod 11 to move together along the positive X-axis during the movement. During the movement of the trip unit push rod 11 along the positive X-axis, the second rod end 112 of the trip unit push rod 11 gradually separates from the leakage current iron core 132. At the same time, the first rod end 111 of the trip unit push rod 11 extends along the positive X-axis and pushes the moving contact 2 to complete the tripping action.

[0056] like Figures 8 to 10As shown, when a leakage fault occurs in the circuit, the leakage coil 131 generates a second magnetic force, which drives the leakage electric core 132 to approach the stationary core 17 along the positive X-axis (i.e., the first direction). During the movement of the leakage electric core 132 along the positive X-axis, it pushes the second rod end 112 of the trip unit push rod 11, thereby driving the trip unit push rod 11 as a whole to move along the positive X-axis, so that the first rod end 111 of the trip unit push rod 11 extends along the positive X-axis and pushes the moving contact 2 to complete the tripping action. At the same time, during the movement of the leakage electric core 132 along the positive X-axis, it pushes the leakage current indicator module 14, thereby driving the leakage current indicator module 14 to move to the indicator position.

[0057] Therefore, based on the specific structural configuration of the trip unit assembly 1 in this embodiment, the following technical effects can be achieved: First, by fixing the short-circuit moving iron core 122 to the trip unit push rod 11 and making the leakage current electric iron core 132 abut against the second rod end 112 of the trip unit push rod 11, the short-circuit protection function and the leakage current protection function can share the same trip unit push rod 11, while ensuring that the operation of the trip unit push rod 11 does not interfere with each other under the two fault conditions. When a short-circuit fault occurs, the trip unit push rod 11 is directly driven by the short-circuit moving iron core 122 fixed thereon; when a leakage current fault occurs, the trip unit push rod 11 is pushed from the end by the leakage current electric iron core 132. The above two driving methods are relatively independent in the motion path, avoiding the risk of operation failure that may be caused by functional coupling.

[0058] Secondly, by placing the leakage current indicator module 14 between the short-circuit moving iron core 122 and the leakage current electric iron core 132, a direct correlation is established between the triggering of the leakage current indicator module 14 and the operation of the leakage current electric iron core 132. When the leakage current electric iron core 132 moves, it will inevitably pass through and push the leakage current indicator module 14 located in front of it, thus ensuring that the leakage current indicator module 14 can be reliably triggered every time the leakage protection operates. When the short-circuit moving iron core 122 moves, it will move away from the leakage current indicator module 14, and it will cause the trip unit push rod 11 to separate from the leakage current electric iron core 132. This ensures that the movement of the short-circuit moving iron core 122 will not have a driving effect on the leakage current indicator module 14, thereby preventing the leakage current indicator module 14 from being falsely triggered when a short-circuit fault occurs.

[0059] Third, the above-mentioned structural layout makes full use of the internal space of the trip unit assembly 1, and integrates the triggering mechanism of the leakage current indication module 14 into the gap area between the short-circuit moving iron core 122 and the leakage current moving iron core 132. In this way, there is no need to set up an independent drive source for the leakage current indication module 14, which is conducive to further simplifying the structure and reducing the size of the circuit breaker.

[0060] In one embodiment, refer to Figures 1 to 10The trip unit assembly 1 also includes a trip unit frame 15, which is configured as a cylindrical structure. The trip unit top rod 11, the stationary iron core 17, the short-circuit moving iron core 122, and the leakage current electric iron core 132 are disposed in the inner cavity of the trip unit frame 15. The magnetic coil 121 is disposed on the outer periphery of the trip unit frame 15 and surrounds the short-circuit moving iron core 122, and the leakage current coil 131 is disposed on the outer periphery of the trip unit frame 15 and surrounds the leakage current electric iron core 132. The trip unit frame 15 is provided with a clearance opening 151 that communicates with the inner cavity; the leakage current indicator module 14 has an actuator 1421, which passes through the clearance opening 151 and extends inward to the space between the short-circuit moving iron core 122 and the leakage current moving iron core 132; the leakage current moving iron core 132 is used to push the actuator 1421 under the action of a second magnetic force to move the leakage current indicator module 14 to the indicator position.

[0061] In this embodiment, the main body of the trip unit frame 15 can be configured as a cylindrical structure extending along the X-axis; a flange structure 152 can be provided at the end of the cylindrical structure away from the moving contact 2, so as to form a sealing effect on one end of the inner cavity of the trip unit frame 15 through the flange structure 152. The trip unit push rod 11, stationary iron core 17, short-circuit moving iron core 122, and leakage current iron core 132 are all disposed in the inner cavity of the trip unit frame 15; as Figures 2 to 4 As shown, in the initial state before tripping, the leakage current-driven iron core 132 is located at the bottom of the inner cavity of the trip unit frame 15 and fits against the flange structure 152 to form a positioning reference in the axial direction. After the tripping operation is triggered, the short-circuit moving iron core 122 and the leakage current-driven iron core 132 can slide stably along the X-axis under the guidance of the inner cavity wall.

[0062] A magnetic coil 121 is arranged around the outer periphery of the trip unit frame 15, and the axial position of the magnetic coil 121 corresponds to the axial position of the short-circuit moving iron core 122. Similarly, a leakage current coil 131 is arranged around the outer periphery of the trip unit frame 15, and the end face of the leakage current coil 131 facing away from the moving contact 2 can abut against the flange structure 152 of the trip unit frame 15, so that the axial position of the leakage current coil 131 corresponds to the axial position of the leakage current moving iron core 132.

[0063] The upper side of the trip unit frame 15 has a clearance opening 151, which corresponds to the gap area between the short-circuit moving iron core 122 and the leakage current electric iron core 132. The leakage current indicator module 14 has an actuating part 1421 extending downward along the Y-axis. The actuating part 1421 passes through the clearance opening 151 of the trip unit frame 15 and extends to the gap area between the short-circuit moving iron core 122 and the leakage current electric iron core 132. The specific form of the actuating part 1421 can be set according to the overall structure of the leakage current indicator module 14. For example, the actuating part 1421 can be set as a rod-shaped structure or a sheet-shaped structure integrally formed on the leakage current indicator module 14, or it can be set as a transmission component attached to the leakage current indicator module 14. No limitation is made here.

[0064] When a leakage fault occurs, such as Figures 8 to 10 As shown, the leakage current electric core 132 moves along the positive X-axis under the drive of the second magnetic force; when the leakage current electric core 132 comes into contact with the actuator 1421 during the movement, the leakage current electric core 132 can drive the entire leakage current indicator module 14 to the indicator position by pushing the actuator 1421.

[0065] Based on the above structural configuration, the various functional components of the trip unit assembly 1 can be integrated into a relatively independent modular assembly, which makes it easier to install and position the circuit breaker as a whole during the assembly process, and helps to improve assembly efficiency and product consistency. On this basis, the leakage current electric core 132 can be used to drive the leakage current indication module 14 through the actuation part 1421 extending into the inner cavity of the trip unit frame 15.

[0066] In one embodiment, refer to Figures 2 to 10 The trip unit assembly 1 also includes a first elastic element 16, which is connected to the stationary iron core 17 and the short-circuit moving iron core 122. The elastic force provided by the first elastic element 16 is used to drive the short-circuit moving iron core 122 away from the stationary iron core 17 in a second direction; the second direction is opposite to the first direction.

[0067] In this embodiment, the first elastic element 16 can be a spring, a sheet, an elastic gel, etc. For example, the first elastic element 16 can be made of... Figure 3 , Figure 6 and Figure 9 Taking the spring shown as an example, one end of the first elastic element 16 is connected to the stationary iron core 17 and the other end is connected to the short-circuit moving iron core 122. In the initial state before the trip is triggered, the first elastic element 16 is in a pre-compressed state. The first elastic element 16 can provide an elastic force to the short-circuit moving iron core 122 in the opposite direction of the X-axis (i.e., the second direction), so that the second rod end 112 of the trip unit push rod 11 is firmly abutted against the leakage current iron core 132, thereby maintaining a preset interval distance between the short-circuit moving iron core 122 and the stationary iron core 17.

[0068] When a short circuit fault occurs, such as Figures 5 to 7 As shown, the first magnetic force drives the short-circuited moving iron core 122 to overcome the elastic force of the first elastic element 16 and move closer to the stationary iron core 17 along the positive X-axis, so that the first elastic element 16 is further compressed. When the short-circuit fault is cleared, the first magnetic force disappears, and the first elastic element 16 will release its elastic potential energy and drive the short-circuited moving iron core 122 to move in the opposite direction (i.e., the second direction) along the X-axis, thereby driving the trip unit push rod 11 to reset from the pushed-out state to the retracted state.

[0069] When a leakage fault occurs, such as Figures 8 to 10 As shown, the second magnetic force drives the leakage current electric core 132 to overcome the elastic force of the first elastic element 16 and move closer to the stationary core 17 along the positive X-axis, so that the first elastic element 16 is further compressed. When the leakage fault is cleared and the leakage coil 131 is de-energized, the first elastic element 16 will release its elastic potential energy and drive the short-circuit moving core 122 and the trip unit push rod 11 to move in the opposite direction (i.e., the second direction) along the X-axis, thereby driving the trip unit push rod 11 to reset from the pushed-out state to the retracted state. At the same time, the second rod end 112 of the trip unit push rod 11 pushes the leakage current electric core 132 to reset to the initial state in the opposite direction (i.e., the second direction) along the X-axis.

[0070] This embodiment, by setting the first elastic element 16, enables the trip unit top rod 11 to automatically reset after each tripping action, ensuring that the circuit breaker has the ability to reclose without requiring additional reset operation of the trip unit assembly 1, thereby improving the continuity of the trip unit assembly 1's operation and the ease of use of the circuit breaker.

[0071] In one embodiment, refer to Figures 2 to 10 The circuit breaker also includes a housing 4, and a trip unit assembly 1 is disposed in the inner cavity of the housing 4; The leakage current indication module 14 includes an indicator 141, an actuation latch 142, and a second elastic element 143; the indicator 141 is slidably fitted on the housing 4; the second elastic element 143 is connected to the housing 4 and the indicator 141, and the elastic force provided by the second elastic element 143 is used to drive the indicator 141 to extend out of the housing 4. The actuation latch 142 abuts against the indicator 141 to prevent the indicator 141 from extending out of the housing 4; the actuation latch 142 has an actuation part 1421, which is disposed between the short-circuit moving iron core 122 and the leakage electric iron core 132; the leakage electric iron core 132 is used to push the actuation part 1421 under the action of a second magnetic force to drive the actuation latch 142 to separate from the indicator 141.

[0072] In this embodiment, as Figure 3 , Figure 6 and Figure 9As shown, the indicator 141 can be configured as a slider, pin, column or other component with a highly recognizable color; the housing 4 can be provided with a groove or guide hole extending along the Y-axis, and the indicator 141 can be accommodated in the groove or guide hole and slide back and forth along the Y-axis.

[0073] The second elastic element 143 can be a spring, a sheet, an elastic colloid, etc.; the second elastic element 143 can be made of, for example, a spring, a sheet, an elastic colloid, etc. Figure 3 , Figure 6 and Figure 9 Taking the spring shown as an example, the lower end of the second elastic element 143 can be connected to the rib structure inside the outer shell 4, and the upper end of the second elastic element 143 is connected to the indicator 141.

[0074] The actuation latch 142 can be movably disposed inside the housing 4 along the X-axis by means of a corresponding limiting structure; in the initial state, part of the structure of the actuation latch 142 can abut against the vertical side wall of the indicator 141 to prevent the indicator 141 from extending upward along the Y-axis of the housing 4 under the elastic force of the second elastic member 143.

[0075] Regarding the contact method between the actuating latch 142 and the indicator 141, in practical applications, the actuating latch 142 may be provided with a latching structure 621 and a hook structure and fastened to the indicator 141 to prevent the indicator 141 from extending upward under the drive of the second elastic member 143; the actuating latch 142 and the indicator 141 may also be in surface contact so that the friction generated by the surface contact can overcome the elastic force of the second elastic member 143, thereby preventing the indicator 141 from extending upward.

[0076] The actuation latch 142 also has an actuation portion 1421 extending downward along the Y-axis, which passes through the clearance opening 151 of the trip unit frame 15 and extends to the gap area between the short-circuit moving iron core 122 and the leakage electric iron core 132.

[0077] Based on the above structural configuration, the operation of the leakage current indication module 14 in this embodiment is as follows: In the absence of a leakage fault, such as Figures 2 to 4 As shown, the actuating part 1421 of the actuating latch 142 is located between the short-circuit moving iron core 122 and the leakage electric iron core 132, and the actuating latch 142 and the indicator 141 maintain an abutting relationship, thereby overcoming the elastic force of the second elastic member 143 and constraining the indicator 141 in the initial position (i.e., the position where the indicator 141 does not extend out of the outer casing 4). At this time, the second elastic member 143 is in a pre-compressed state.

[0078] When a leakage fault occurs, such as Figures 8 to 10As shown, the leakage current electric core 132 moves along the positive X-axis (i.e., the first direction) under the drive of the second magnetic force; during the movement, the leakage current electric core 132 contacts the actuator 1421 and drives the entire actuator latch 142 to move along the positive X-axis by pushing the actuator 1421, so that the actuator latch 142 separates from the indicator 141; after losing the constraint of the actuator latch 142, the indicator 141 will slide upward along the Y-axis under the drive of the elastic force released by the second elastic member 143 until the indicator 141 extends out of the housing 4 (i.e., the indicator 141 moves to the preset indicator position); at this time, the user can observe the part of the indicator 141 extending out of the housing 4, thereby knowing that this tripping action was caused by a leakage current fault.

[0079] After the leakage fault is cleared, the user can press the indicator 141 directly or indirectly to make the indicator 141 overcome the elastic force of the second elastic element 143 and retract downward along the Y axis to the initial position, and make the actuation latch 142 abut against the indicator 141 again to prepare for the next leakage protection.

[0080] Based on the above settings, when a leakage fault occurs, the movement of the leakage current electromagnet 132 can directly trigger the actuation latch 142 to release the indicator 141, thus realizing the synchronous linkage between the leakage current protection action and the leakage current indication action. Furthermore, since the leakage current energized iron core 132 indirectly triggers the indicator 141 to pop out by pushing the actuation part 1421 of the actuation latch 142, rather than directly pushing the indicator 141 itself through the leakage current energized iron core 132, the final pop-out direction of the indicator 141 can be set independently of the moving direction of the leakage current energized iron core 132. Specifically, the sliding direction of the indicator 141 can be set according to the specific structural layout or appearance design requirements of the circuit breaker. The sliding direction of the indicator 141 can be set to be the same as, perpendicular to, or at any angle to the moving direction of the leakage current energized iron core 132. Only the structure of the actuation latch 142 and the contact fit between the actuation latch 142 and the indicator 141 need to be adjusted accordingly. Thus, the arrangement of the leakage current indicator module 14 is no longer limited by the moving direction of the leakage current energized iron core 132, which provides greater design freedom for the internal space layout of the circuit breaker.

[0081] In one embodiment, refer to Figures 2 to 10 The indicator 141 is slidably fitted onto the housing 4 along a third direction; the indicator 141 is provided with a limiting groove 1411, which extends along a second direction; the second direction is opposite to the first direction, and the third direction is perpendicular to the first and second directions; The actuation latch 142 has a latching part 1422; the latching part 1422 is engaged in the limiting groove 1411 to prevent the indicator 141 from sliding in a third direction; The leakage electric core 132 is used to push the actuator 1421 under the second magnetic force, so as to drive the latching part 1422 to disengage from the limiting groove 1411 along the first direction.

[0082] In this embodiment, as Figure 3 , Figure 6 and Figure 9 As shown, the interior of the outer casing 4 is provided with a partition rib, and the indicator 141 can be disposed above the partition rib; the second elastic member 143 is connected to the partition rib and the indicator 141 respectively, so as to provide an elastic force along the Y-axis to the indicator 141; the main body of the actuation latch 142 is disposed below the partition rib, and the actuation latch 142 can move along the X-axis by utilizing the limiting effect of the partition rib.

[0083] The limiting groove 1411 is formed on the right side wall of the indicator 141 and extends in the opposite direction (i.e., the second direction) along the X-axis. The upper part of the actuation latch 142 is provided with a latching part 1422, which includes a first structural segment 14221 and a second structural segment 14222 connected in sequence. The first structural segment 14221 extends upward along the Y-axis from the main body of the actuation latch 142 to the top of the partition rib. The second structural segment 14222 is disposed on the top of the first structural segment 14221 and extends in the opposite direction (i.e., the second direction) along the X-axis. When the second structural segment 14222 is inserted into the limiting groove 1411, the latching part 1422 can form a latching effect on the indicator 141 to prevent the indicator 141 from sliding upward along the Y-axis (i.e., sliding in the third direction).

[0084] Based on the above settings, when a leakage fault occurs, such as Figures 8 to 10 As shown, the leakage current electric core 132 moves along the positive X-axis (i.e., the first direction) under the drive of the second magnetic force; during the movement, the leakage current electric core 132 contacts the actuator 1421 and drives the entire actuator latch 142 to move along the positive X-axis by pushing the actuator 1421, so that the latch 1422 disengages from the limiting groove 1411; after losing the latching constraint of the latch 1422, the indicator 141 will slide upward along the Y-axis under the drive of the elastic force released by the second elastic member 143 until the indicator 141 extends out of the housing 4 (i.e., the indicator 141 moves to the preset indicator position); at this time, the user can observe the part of the indicator 141 extending out of the housing 4, thereby knowing that this tripping action was caused by a leakage current fault.

[0085] After the leakage fault is cleared, the user can press the indicator 141 directly or indirectly to make the indicator 141 overcome the elastic force of the second elastic member 143 and retract downward along the Y axis to the initial position, and make the buckle part 1422 re-fasten in the limiting groove 1411 to prepare for the next leakage protection.

[0086] In one embodiment, refer to Figures 2 to 10 The leakage current indication module 14 also includes a third elastic element 144, which is connected to the housing 4 and the actuation latch 142. The elastic force provided by the third elastic element 144 is used to drive the actuation latch 142 to move along the second direction.

[0087] Specifically, the third elastic element 144 can be a spring, a sheet, an elastic colloid, etc.; the third elastic element 144 can be made of, for example... Figure 3 , Figure 6 and Figure 9 Taking the spring shown as an example, the left end of the third elastic element 144 can be connected to the rib structure inside the outer shell 4, and the right end of the third elastic element 144 is connected to the actuation latch 142. The third elastic element 144 is in a pre-compressed state in the initial state. The third elastic element 144 can provide an elastic force to the actuation latch 142 in the opposite direction along the X-axis (i.e., the second direction), so that the latching part 1422 moves in the direction close to the limiting groove 1411, thereby making the latching part 1422 securely fastened in the limiting groove 1411.

[0088] Based on the above settings, when a leakage fault occurs, such as Figures 8 to 10 As shown, the leakage electric core 132 pushes the actuator 1421 during the movement, thereby causing the actuator latch 142 to overcome the elastic force of the third elastic member 144 and move along the positive X-axis (i.e., the first direction), so that the latch 1422 disengages from the limiting groove 1411, and then causes the indicator 141 to slide upward along the Y-axis and extend out of the outer shell 4.

[0089] After the leakage fault is cleared, the user can directly or indirectly press the indicator 141 to make the indicator 141 overcome the elastic force of the second elastic element 143 and retract to the initial position along the Y-axis downward. When the limiting groove 1411 of the indicator 141 moves downward along the Y-axis to be opposite to the latching part 1422, the latching part 1422 can move in the opposite direction (i.e., the second direction) along the X-axis under the elastic force of the third elastic element 144 and re-lock into the limiting groove 1411. Therefore, it is not necessary to reset the actuation latch 142 through additional operation, which further improves the continuity of the operation of the trip unit assembly 1 and the ease of use of the circuit breaker.

[0090] In one embodiment, refer to Figure 3 , Figure 6 , Figure 9 and Figure 11 The end of the latching part 1422 has a guide structure 14223, and the width of the guide structure 14223 in the third direction gradually decreases along the second direction.

[0091] In this embodiment, the guide structure 14223 may be provided at the end portion of the latching portion 1422 that is fastened to the limiting groove 1411; specifically, the guide structure 14223 may be provided as a chamfered structure, a rounded corner structure or a combination of the two, so as to form a transition portion that gradually narrows in the opposite direction (i.e., the second direction) along the X-axis at the end of the latching portion 1422.

[0092] By setting the above-mentioned guide structure 14223, when the user presses the indicator 141 downward along the Y-axis to reset the indicator 141, the smooth contact between the guide structure 14223 and the groove wall of the limiting groove 1411 can guide the buckle part 1422 to smoothly re-engage in the limiting groove 1411. This can improve the operating feel, avoid jamming problems, and reduce the wear between the buckle part 1422 and the limiting groove 1411 while realizing the reset operation of the actuation lock 142, which is conducive to extending the service life of the product.

[0093] In one embodiment, refer to Figures 2 to 10 The circuit breaker also includes a housing 4, and a trip unit assembly 1 is disposed in the inner cavity of the housing 4; The leakage current indication module 14 includes an indicator 141, an actuation latch 142, and a second elastic element 143; the indicator 141 is slidably fitted on the housing 4; the second elastic element 143 is connected to the housing 4 and the indicator 141, and the elastic force provided by the second elastic element 143 is used to drive the indicator 141 to extend out of the housing 4. The actuation latch 142 abuts against the indicator 141 to prevent the indicator 141 from extending out of the housing 4; the actuation latch 142 is used to move away from the indicator 141 under the drive of a second magnetic force.

[0094] In this embodiment, as Figure 3 , Figure 6 and Figure 9 As shown, the indicator 141 can be configured as a slider, pin, column or other component with a highly recognizable color; the housing 4 can be provided with a groove or guide hole extending along the Y-axis, and the indicator 141 can be accommodated in the groove or guide hole and slide back and forth along the Y-axis.

[0095] The second elastic element 143 can be a spring, a sheet, an elastic colloid, etc.; the second elastic element 143 can be made of, for example, a spring, a sheet, an elastic colloid, etc. Figure 3 , Figure 6 and Figure 9 Taking the spring shown as an example, the lower end of the second elastic element 143 can be connected to the rib structure inside the outer shell 4, and the upper end of the second elastic element 143 is connected to the indicator 141.

[0096] The actuation latch 142 can be movably disposed inside the housing 4 along the X-axis by means of a corresponding limiting structure; in the initial state, part of the structure of the actuation latch 142 can abut against the vertical side wall of the indicator 141 to prevent the indicator 141 from extending upward along the Y-axis of the housing 4 under the elastic force of the second elastic member 143.

[0097] Regarding the contact method between the actuating latch 142 and the indicator 141, in practical applications, the actuating latch 142 may be provided with a latching structure 621 and a hook structure and fastened to the indicator 141 to prevent the indicator 141 from extending upward under the drive of the second elastic member 143; the actuating latch 142 and the indicator 141 may also be in surface contact so that the friction generated by the surface contact can overcome the elastic force of the second elastic member 143, thereby preventing the indicator 141 from extending upward.

[0098] Based on the above structural configuration, the operation of the leakage current indication module 14 in this embodiment is as follows: In the absence of a leakage fault, such as Figures 2 to 4 As shown, the actuating part 1421 of the actuating latch 142 is located between the short-circuit moving iron core 122 and the leakage electric iron core 132, and the actuating latch 142 and the indicator 141 maintain an abutting relationship, thereby overcoming the elastic force of the second elastic member 143 and constraining the indicator 141 in the initial position (i.e., the position where the indicator 141 does not extend out of the outer casing 4). At this time, the second elastic member 143 is in a pre-compressed state.

[0099] When a leakage fault occurs, such as Figures 8 to 10 As shown, the actuation latch 142 can move along the positive X-axis under the drive of the second magnetic force generated by the second electromagnetic drive module 13, thereby separating the actuation latch 142 from the indicator 141; after losing the constraint of the actuation latch 142, the indicator 141 will slide upward along the Y-axis under the drive of the elastic force released by the second elastic member 143 until the indicator 141 extends out of the housing 4 (that is, the indicator 141 moves to the preset indication position); at this time, the user can observe the part of the indicator 141 extending out of the housing 4, thereby knowing that this tripping action was caused by a leakage fault.

[0100] After the leakage fault is cleared, the user can press the indicator 141 directly or indirectly to make the indicator 141 overcome the elastic force of the second elastic element 143 and retract downward along the Y axis to the initial position, and make the actuation latch 142 abut against the indicator 141 again to prepare for the next leakage protection.

[0101] Based on the above configuration, since the actuation latch 142 moves under the drive of the second magnetic force to indirectly trigger the indicator 141 to pop out, rather than directly driving the indicator 141 itself through the second magnetic force, the final pop-out direction of the indicator 141 can be set independently of the direction of the second magnetic force. Specifically, the sliding direction of the indicator 141 can be set according to the specific structural layout or appearance design requirements of the circuit breaker. The sliding direction of the indicator 141 can be set to be the same as, perpendicular to, or at any angle to the direction of the second magnetic force. Only the structure of the actuation latch 142 and the contact fit between the actuation latch 142 and the indicator 141 need to be adjusted accordingly. Thus, the arrangement of the leakage current indicator module 14 is no longer limited by the direction of the second magnetic force, which provides greater design freedom for the internal space layout of the circuit breaker.

[0102] In one embodiment, refer to Figures 2 to 10 The indicator 141 is slidably fitted onto the housing 4 in a third direction; the indicator 141 is provided with a limiting groove 1411, which extends in a second direction; The actuation latch 142 has a latching part 1422; the latching part 1422 is engaged in the limiting groove 1411 to prevent the indicator 141 from sliding in a third direction; The actuating latch 142 is used to move along the first direction under the drive of the second magnetic force, so as to drive the latch part 1422 to disengage from the limiting groove 1411; the first direction is opposite to the second direction, and the third direction is perpendicular to the first direction and the second direction.

[0103] In this embodiment, as Figure 3 , Figure 6 and Figure 9 As shown, the interior of the outer casing 4 is provided with a partition rib, and the indicator 141 can be disposed above the partition rib; the second elastic member 143 is connected to the partition rib and the indicator 141 respectively, so as to provide an elastic force along the Y-axis to the indicator 141; the main body of the actuation latch 142 is disposed below the partition rib, and the actuation latch 142 can move along the X-axis by utilizing the limiting effect of the partition rib.

[0104] The limiting groove 1411 is formed on the right side wall of the indicator 141 and extends in the opposite direction (i.e., the second direction) along the X-axis. The upper part of the actuation latch 142 is provided with a latching part 1422, which includes a first structural segment 14221 and a second structural segment 14222 connected in sequence. The first structural segment 14221 extends upward along the Y-axis from the main body of the actuation latch 142 to the top of the partition rib. The second structural segment 14222 is disposed on the top of the first structural segment 14221 and extends in the opposite direction (i.e., the second direction) along the X-axis. When the second structural segment 14222 is inserted into the limiting groove 1411, the latching part 1422 can form a latching effect on the indicator 141 to prevent the indicator 141 from sliding upward along the Y-axis (i.e., sliding in the third direction).

[0105] Based on the above settings, when a leakage fault occurs, such as Figures 8 to 10 As shown, the actuation latch 142 moves along the positive X-axis (i.e., the first direction) under the drive of the second magnetic force, causing the latching part 1422 to disengage from the limiting groove 1411; after losing the latching constraint of the latching part 1422, the indicator 141 will slide upward along the Y-axis under the drive of the elastic force released by the second elastic member 143 until the indicator 141 extends out of the housing 4 (i.e., the indicator 141 moves to the preset indicator position); at this time, the user can observe the part of the indicator 141 extending out of the housing 4, thereby knowing that this tripping action was caused by a leakage fault.

[0106] After the leakage fault is cleared, the user can press the indicator 141 directly or indirectly to make the indicator 141 overcome the elastic force of the second elastic member 143 and retract downward along the Y axis to the initial position, and make the buckle part 1422 re-fasten in the limiting groove 1411 to prepare for the next leakage protection.

[0107] In one embodiment, refer to Figures 2 to 10 The leakage current indication module 14 also includes a third elastic element 144, which is connected to the housing 4 and the actuation latch 142. The elastic force provided by the third elastic element 144 is used to drive the actuation latch 142 to move along the second direction.

[0108] Specifically, the third elastic element 144 can be a spring, a sheet, an elastic colloid, etc.; the third elastic element 144 can be made of, for example... Figure 3 , Figure 6 and Figure 9Taking the spring shown as an example, the left end of the third elastic element 144 can be connected to the rib structure inside the outer shell 4, and the right end of the third elastic element 144 is connected to the actuation latch 142. The third elastic element 144 is in a pre-compressed state in the initial state. The third elastic element 144 can provide an elastic force to the actuation latch 142 in the opposite direction along the X-axis (i.e., the second direction), so that the latching part 1422 moves in the direction close to the limiting groove 1411, thereby making the latching part 1422 securely fastened in the limiting groove 1411.

[0109] Based on the above settings, when a leakage fault occurs, such as Figures 8 to 10 As shown, the actuation latch 142 moves along the positive X-axis (i.e., the first direction) under the drive of the second magnetic force, overcoming the elastic force of the third elastic member 144, so that the latch 1422 disengages from the limiting groove 1411, and then the indicator 141 slides upward along the Y-axis and extends out of the outer shell 4.

[0110] After the leakage fault is cleared, the user can directly or indirectly press the indicator 141 to overcome the elastic force of the second elastic element 143 and retract it downward along the Y-axis to its initial position. When the limiting groove 1411 of the indicator 141 moves downward along the Y-axis to be opposite to the latching part 1422, the latching part 1422 can move in the opposite direction (i.e., the second direction) along the X-axis under the elastic force of the third elastic element 144 and re-engage in the limiting groove 1411. This eliminates the need for additional operation to reset the actuation latch 142, further improving the continuity of the trip unit assembly 1's operation and the ease of use of the circuit breaker. In one embodiment, refer to Figure 3 , Figure 6 , Figure 9 and Figure 11 The end of the latching part 1422 has a guide structure 14223, and the width of the guide structure 14223 in the third direction gradually decreases along the second direction.

[0111] In this embodiment, the guide structure 14223 may be provided at the end portion of the latching portion 1422 that is fastened to the limiting groove 1411; specifically, the guide structure 14223 may be provided as a chamfered structure, a rounded corner structure or a combination of the two, so as to form a transition portion that gradually narrows in the opposite direction (i.e., the second direction) along the X-axis at the end of the latching portion 1422.

[0112] By setting the above-mentioned guide structure 14223, when the user presses the indicator 141 downward along the Y-axis to reset the indicator 141, the smooth contact between the guide structure 14223 and the groove wall of the limiting groove 1411 can guide the buckle part 1422 to smoothly re-engage in the limiting groove 1411. This can improve the operating feel, avoid jamming problems, and reduce the wear between the buckle part 1422 and the limiting groove 1411 while realizing the reset operation of the actuation lock 142, which is conducive to extending the service life of the product.

[0113] In one embodiment, refer to Figures 2 to 10 The circuit breaker also includes a handle 5 and a multi-link mechanism 6. The handle 5 is connected to the moving contact 2 via the multi-link mechanism 6. During the opening process, the moving contact 2 drives the handle 5 to rotate to the opening position via the multi-link mechanism 6. During the process of the handle 5 rotating from the opening position to the closing position, the moving contact 2 is driven to close via the multi-link mechanism 6. When the trip unit push rod 11 drives the moving contact 2 to open under the second magnetic force, the leakage current indicator module 14, which moves to the indicated position, is used to prevent the handle 5 from rotating to the open position, so as to disconnect the transmission chain of the multi-link mechanism 6, thereby releasing the transmission connection between the handle 5 and the moving contact 2.

[0114] In this embodiment, the handle 5 is rotatably connected to the housing 4, and the user can perform the closing and opening operations of the circuit breaker by rotating the handle 5.

[0115] The leakage current indicator module 14 is movably mounted on the housing 4; when the leakage current indicator module 14 is moved to the indicating position, at least a portion of the structure of the leakage current indicator module 14 will be located on the rotation path of the handle 5. Specifically, the leakage current indicator module 14 can protrude from the surface of the housing 4 when it is moved to the indicating position, thereby using the portion of the leakage current indicator module 14 protruding from the housing 4 to prevent the handle 5 from rotating to the open position that is in contact with the housing 4.

[0116] The multi-link mechanism 6 is used to create a transmission action between the handle 5 and the moving contact 2. Specifically, as follows: Figure 2 and Figure 4 As shown, when the user rotates handle 5 from the open position to the closed position, the rotation of handle 5 is transmitted to the moving contact 2 through the multi-link mechanism 6, causing the moving contact 2 to move closer to the stationary contact 3, thereby realizing the closing operation of the moving contact 2; as Figure 5 and Figure 7As shown, when the user rotates the handle 5 from the closed position to the open position, the rotation of the handle 5 is transmitted to the moving contact 2 through the multi-link mechanism 6, causing the moving contact 2 to move away from the stationary contact 3, thereby realizing the opening operation of the moving contact 2. Correspondingly, when the trip unit push rod 11 pushes out and pushes the moving contact 2 to open, the moving contact 2, in the process of moving away from the stationary contact 3, will drive the handle 5 from the closed position to the open position through the multi-link mechanism 6.

[0117] The multi-link mechanism 6 includes at least one set of separable connecting pairs. Under normal conditions, the connecting pairs remain engaged, forming a transmission connection between the handle 5 and the moving contact 2. When the connecting pairs are separated, the transmission connection between the handle 5 and the moving contact 2 is cut off.

[0118] The specific structure of the multi-link mechanism 6 can be referenced from existing circuit breakers, and will not be elaborated here.

[0119] Based on the above settings, the specific linkage process of each mechanism in this embodiment is as follows: When the trip unit push rod 11, driven by the second magnetic force, actuates the moving contact 2 to open the circuit, the moving contact 2 will drive the handle 5 to rotate from the closed position via the multi-link mechanism 6, causing the handle 5 to gradually approach the open position. Simultaneously, the leakage current indicator module 14 will move to the indicator position under the drive of the second magnetic force. The leakage current indicator module 14 at the indicator position will then block the handle 5, preventing it from rotating to the open position. At this time, if... Figure 8 and Figure 10 As shown, the handle 5 remains in contact with the leakage current indicator module 14 and is in a stationary state. This causes the part of the multi-link mechanism 6 connected to the handle 5 to also be in a stationary state, while the part of the multi-link mechanism 6 connected to the moving contact 2 continues to move with the opening action of the moving contact 2. This causes the separable connecting parts in the multi-link mechanism 6, which were originally in an engaged state, to separate due to relative movement. Figure 10 As shown, when the connecting pair is separated, the transmission connection between the handle 5 and the moving contact 2 is released; at this time, even if the user rotates the handle 5 in the opposite direction to the closing position, the moving contact 2 cannot be driven to move synchronously through the multi-link mechanism 6, so the closing operation of the moving contact 2 cannot be realized.

[0120] Based on the above linkage structure, when a leakage fault occurs, the transmission chain between the handle 5 and the moving contact 2 can be cut off by the blocking effect of the leakage indicator module 14 on the handle 5. At this time, even if the user forcibly turns the handle 5 to the closed position, the handle 5 cannot drive the moving contact 2 to complete the closing operation. This can avoid the equipment damage and electric shock risk that may occur if the power is forcibly turned on before the leakage fault is eliminated, thereby improving the safety of the circuit breaker.

[0121] In one embodiment, refer to Figure 4 , Figure 7 and Figure 10 The multi-link mechanism 6 includes a first link mechanism 61 and a second link mechanism 62; one end of the first link mechanism 61 is connected to the handle 5 for transmission, and the other end of the first link mechanism 61 is provided with a jump buckle structure 611; one end of the second link mechanism 62 is connected to the moving contact 2 for transmission, and the other end of the second link mechanism 62 is provided with a buckle structure 621. The tripping structure 611 is movably attached to the latching structure 621. When the handle 5 is turned to the open position and blocked by the leakage current indicator module 14, the first linkage mechanism 61 stops moving, and the second linkage mechanism 62 continues to move with the moving contact 2, causing the latching structure 621 to separate from the tripping structure 611, thereby cutting off the transmission connection between the first linkage mechanism 61 and the second linkage mechanism 62.

[0122] In this embodiment, the snap fastener structure 611 can be configured as a hook-shaped member rotatably connected to the first linkage mechanism 61; the snap fastener structure 621 can be provided with a stepped surface or groove, which is used to form an overlapping engagement with the hook-shaped part of the snap fastener structure 611.

[0123] Under normal conditions, the hook-shaped portion of the jump-button structure 611 engages with the stepped surface or groove of the latching structure 621, keeping the jump-button structure 611 and the latching structure 621 in a engaged state. This establishes a transmission connection between the first linkage mechanism 61 and the second linkage mechanism 62, allowing the rotation of the handle 5 to be transmitted to the moving contact 2 via the first linkage mechanism 61 and the second linkage mechanism 62. When the jump-button structure 611 separates from the latching structure 621, the transmission connection between the first linkage mechanism 61 and the second linkage mechanism 62 is severed.

[0124] The specific structures of the first linkage mechanism 61 and the second linkage mechanism 62 can be referred to existing circuit breakers, and will not be elaborated here.

[0125] Based on the above structural configuration, when a leakage fault occurs and the leakage indicator module 14 moves to the indicator position, the leakage indicator module 14 prevents the handle 5 from rotating to the open position; at this time, the first linkage mechanism 61 stops moving with the handle 5, and the tripping structure 611 at the end of the first linkage mechanism 61 also stops at the corresponding position; simultaneously, the moving contact 2 continues to complete the opening action under the push of the trip unit push rod 11, and the moving contact 2 can drive the second linkage mechanism 62 and its end latching structure 621 to continue moving; as Figure 10As shown, since the first linkage mechanism 61 has stopped moving while the second linkage mechanism 62 is still moving, the jump buckle structure 611 and the snap buckle structure 621, which were originally in an overlapping state, are displaced relative to each other and separated. After the jump buckle structure 611 and the snap buckle structure 621 are separated, the transmission connection between the first linkage mechanism 61 and the second linkage mechanism 62 is cut off, and there is no longer a transmission relationship between the handle 5 and the moving contact 2.

[0126] like Figure 10 As shown, when the transmission relationship between the handle 5 and the moving contact 2 is interrupted, if the user rotates the handle 5 in the reverse direction to the closed position, the handle 5 can only drive the tripping structure 611 to rotate through the first linkage mechanism 61, but cannot further drive the latching structure 621 and the second linkage mechanism 62 to move. Therefore, the moving contact 2 cannot be driven to complete the closing operation through the second linkage mechanism 62. This avoids the potential equipment damage and electric shock risk that may result from forcibly energizing the circuit breaker before the leakage fault has been eliminated, thereby improving the safety of the circuit breaker.

[0127] In one embodiment, refer to Figure 4 , Figure 7 and Figure 10 When the handle 5 is blocked by the leakage current indicator module 14, when the handle 5 overcomes the reset pressure of the leakage current indicator module 14 and rotates to the open position, the handle 5 drives the tripping structure 611 to engage with the latching structure 621 through the first linkage mechanism 61.

[0128] In this embodiment, as Figure 10 As shown, when the leakage current indicator module 14 moves to the indicated position, the leakage current indicator module 14 can block the handle 5 based on elastic force or other overcomeable resistance. After the leakage fault is cleared, the user needs to overcome the reset pressure applied to the handle 5 by the leakage current indicator module 14 and continue to rotate the handle 5 in the direction of the open position, thereby driving the leakage current indicator module 14 back to the initial position and causing the handle 5 to continue to rotate to the open position.

[0129] As the handle 5 continues to rotate from the position blocked by the leakage current indicator module 14 to the open position, the handle 5, through the first linkage mechanism 61, drives the trip latch structure 611 to move in the direction close to the latch structure 621; at the same time, since the moving contact 2 is in the open state, the second linkage mechanism 62 and its end latch structure 621 also remain stationary in the corresponding position; when the handle 5 rotates to the open position, the first linkage mechanism 61 drives the trip latch structure 611 to move to the position corresponding to the latch structure 621, and the hook-shaped part of the trip latch structure 611 can re-engage on the stepped surface or groove of the latch structure 621. Figure 7As shown, when the tripping structure 611 and the latching structure 621 reconnect, the transmission connection between the first linkage mechanism 61 and the second linkage mechanism 62 is restored, and the transmission relationship between the handle 5 and the moving contact 2 is re-established. At this time, the user can rotate the handle 5 from the open position to the closed position, and the handle 5 can drive the moving contact 2 to complete the closing operation through the first linkage mechanism 61 and the second linkage mechanism 62, so that the circuit breaker returns to normal working condition.

[0130] Based on the above reset operation method, the user only needs to press the handle 5 to the open position to simultaneously complete the reset operation of the leakage current indicator module 14 and the re-establishment of the transmission relationship, without having to perform separate operations on the leakage current indicator module 14 and the handle 5, thereby improving the ease of use.

[0131] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A circuit breaker, characterized in that, The circuit breaker includes a trip unit assembly (1), the trip unit assembly (1) comprising: The trip unit push rod (11) is used to drive the moving contact (2) to open the circuit when it is in the pushed-out state; The first electromagnetic drive module (12) is connected to the trip unit push rod (11); The second electromagnetic drive module (13) is connected to the trip unit push rod (11); A leakage current indicator module (14) is connected to the second electromagnetic drive module (13); The first electromagnetic drive module (12) generates a first magnetic force in response to the current under short-circuit conditions. The first magnetic force is used to drive the trip unit push rod (11) to push out. The second electromagnetic drive module (13) generates a second magnetic force in response to the current in the leakage state. The second magnetic force is used to drive the trip rod (11) to push out and to drive the leakage indicator module (14) to move to the indicator position.

2. The circuit breaker according to claim 1, characterized in that, The first electromagnetic drive module (12) includes a magnetic coil (121), a short-circuited moving iron core (122), and a stationary iron core (17); the second electromagnetic drive module (13) includes a leakage coil (131), a leakage moving iron core (132), and the stationary iron core (17); The magnetic coil (121) generates the first magnetic force under short-circuit current, and the first magnetic force is used to drive the short-circuit moving iron core (122) to approach the stationary iron core (17); the short-circuit moving iron core (122) drives the trip unit push rod (11) to extend during the process of approaching the stationary iron core (17); The leakage coil (131) is energized in the leakage state and generates the second magnetic force. The second magnetic force is used to drive the leakage electric core (132) to approach the stationary core (17). As the leakage electric core (132) approaches the stationary core (17), it drives the trip unit push rod (11) to extend. As the leakage electric core (132) approaches the stationary core (17), it drives the leakage indicator module (14) to move to the indicator position.

3. The circuit breaker according to claim 2, characterized in that, The trip unit push rod (11) is slidably fitted onto the stationary iron core (17); the trip unit push rod (11) has a first rod end (111) and a second rod end (112), the first rod end (111) is used to drive the moving contact (2) to open in the pushed-out state, the leakage current electric iron core (132) abuts against the second rod end (112), the short-circuit moving iron core (122) is fixed on the trip unit push rod (11), and the short-circuit moving iron core (122) is located between the stationary iron core (17) and the leakage current electric iron core (132); the leakage current indicator module (14) is movably disposed between the short-circuit moving iron core (122) and the leakage current electric iron core (132); The first magnetic force is used to drive the short-circuited moving iron core (122) to approach the stationary iron core (17) along the first direction, so that the second rod end (112) is separated from the leakage electric iron core (132) by the short-circuited moving iron core (122), and the first rod end (111) is pushed out by the short-circuited moving iron core (122); The second magnetic force is used to drive the leakage electric core (132) to approach the stationary core (17) along the first direction, so as to push the first rod end (111) out through the leakage electric core (132) and push the leakage indicator module (14) to the indicator position through the leakage electric core (132).

4. The circuit breaker according to claim 3, characterized in that, The trip unit assembly (1) further includes a trip unit frame (15), which is configured as a cylindrical structure; the trip unit push rod (11), the stationary iron core (17), the short-circuit moving iron core (122), and the leakage current electric iron core (132) are disposed in the inner cavity of the trip unit frame (15); the magnetic coil (121) is disposed on the outer periphery of the trip unit frame (15) and surrounds the short-circuit moving iron core (122), and the leakage current coil (131) is disposed on the outer periphery of the trip unit frame (15) and surrounds the leakage current electric iron core (132); The trip unit frame (15) is provided with a clearance opening (151) communicating with the inner cavity; the leakage current indicator module (14) has an actuation part (1421), the actuation part (1421) passes through the clearance opening (151) and extends inward to the space between the short-circuit moving iron core (122) and the leakage current moving iron core (132); the leakage current moving iron core (132) is used to push the actuation part (1421) under the second magnetic force to drive the leakage current indicator module (14) to move to the indicated position.

5. The circuit breaker according to claim 3, characterized in that, The trip unit assembly (1) further includes a first elastic element (16), which is connected to the stationary iron core (17) and the short-circuit moving iron core (122). The elastic force provided by the first elastic element (16) is used to drive the short-circuit moving iron core (122) away from the stationary iron core (17) in a second direction; the second direction is opposite to the first direction.

6. The circuit breaker according to claim 3, characterized in that, The circuit breaker also includes a housing (4), and the trip unit assembly (1) is disposed in the inner cavity of the housing (4); The leakage current indication module (14) includes an indicator (141), an actuation latch (142), and a second elastic element (143); the indicator (141) is slidably fitted onto the housing (4); the second elastic element (143) is connected to the housing (4) and the indicator (141), and the elastic force provided by the second elastic element (143) is used to drive the indicator (141) to extend out of the housing (4); The actuation latch (142) abuts against the indicator (141) to prevent the indicator (141) from extending out of the housing (4); the actuation latch (142) has an actuation part (1421) disposed between the short-circuit moving iron core (122) and the leakage electric iron core (132); the leakage electric iron core (132) is used to push the actuation part (1421) under the second magnetic force to drive the actuation latch (142) to separate from the indicator (141).

7. The circuit breaker according to claim 6, characterized in that, The indicator (141) is slidably fitted onto the housing (4) along a third direction; the indicator (141) is provided with a limiting groove (1411), the limiting groove (1411) extends along a second direction; the second direction is opposite to the first direction, and the third direction is perpendicular to the first direction and the second direction; The actuation latch (142) has a latching part (1422); the latching part (1422) is engaged in the limiting groove (1411) to prevent the indicator (141) from sliding along the third direction; The leakage electric core (132) is used to push the actuation part (1421) under the second magnetic force, so as to drive the latching part (1422) to disengage from the limiting groove (1411) along the first direction.

8. The circuit breaker according to claim 7, characterized in that, The leakage current indication module (14) further includes a third elastic element (144), which is connected to the housing (4) and the actuation latch (142). The elastic force provided by the third elastic element (144) is used to drive the actuation latch (142) to move along the second direction.

9. The circuit breaker according to claim 7, characterized in that, The end of the latching part (1422) has a guide structure (14223), the width of which gradually decreases in the third direction along the second direction.

10. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a housing (4), and the trip unit assembly (1) is disposed in the inner cavity of the housing (4); The leakage current indication module (14) includes an indicator (141), an actuation latch (142), and a second elastic element (143); the indicator (141) is slidably fitted onto the housing (4); the second elastic element (143) is connected to the housing (4) and the indicator (141), and the elastic force provided by the second elastic element (143) is used to drive the indicator (141) to extend out of the housing (4); The actuation latch (142) abuts against the indicator (141) to prevent the indicator (141) from extending out of the housing (4); the actuation latch (142) is used to move away from the indicator (141) under the drive of the second magnetic force.

11. The circuit breaker according to claim 10, characterized in that, The indicator (141) is slidably fitted onto the housing (4) in a third direction; the indicator (141) is provided with a limiting groove (1411), which extends in a second direction; The actuation latch (142) has a latching part (1422); the latching part (1422) is engaged in the limiting groove (1411) to prevent the indicator (141) from sliding along the third direction; The actuation latch (142) is used to move along a first direction under the drive of the second magnetic force, so as to drive the latch (1422) to disengage from the limiting groove (1411); the first direction is opposite to the second direction, and the third direction is perpendicular to the first direction and the second direction.

12. The circuit breaker according to claim 11, characterized in that, The leakage current indication module (14) further includes a third elastic element (144), which is connected to the housing (4) and the actuation latch (142). The elastic force provided by the third elastic element (144) is used to drive the actuation latch (142) to move along the second direction.

13. The circuit breaker according to claim 11, characterized in that, The end of the latching part (1422) has a guide structure (14223), the width of which gradually decreases in the third direction along the second direction.

14. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a handle (5) and a multi-link mechanism (6). The handle (5) is connected to the moving contact (2) via the multi-link mechanism (6). During the opening process, the moving contact (2) drives the handle (5) to rotate to the open position via the multi-link mechanism (6). During the process of the handle (5) rotating from the open position to the closed position, the moving contact (2) is driven to close via the multi-link mechanism (6). When the trip unit push rod (11) drives the moving contact (2) to open under the second magnetic force, the leakage current indicator module (14) moved to the indicated position is used to block the handle (5) from rotating to the open position, so that the transmission chain of the multi-link mechanism (6) is disconnected, thereby releasing the transmission connection between the handle (5) and the moving contact (2).

15. The circuit breaker according to claim 14, characterized in that, The multi-link mechanism (6) includes a first link mechanism (61) and a second link mechanism (62); one end of the first link mechanism (61) is connected to the handle (5) in a transmission connection, and the other end of the first link mechanism (61) is provided with a jump buckle structure (611); one end of the second link mechanism (62) is connected to the moving contact (2) in a transmission connection, and the other end of the second link mechanism (62) is provided with a snap-fit ​​structure (621); The tripping structure (611) is movably attached to the latching structure (621); when the handle (5) is blocked by the leakage current indicator module (14) during the process of rotating to the open position, the first linkage mechanism (61) stops moving, and the second linkage mechanism (62) continues to move with the moving contact (2) to separate the latching structure (621) from the tripping structure (611), thereby cutting off the transmission connection between the first linkage mechanism (61) and the second linkage mechanism (62).

16. The circuit breaker according to claim 15, characterized in that, When the handle (5) is blocked by the leakage current indicator module (14), when the handle (5) overcomes the reset pressure of the leakage current indicator module (14) and rotates to the open position, the handle (5) drives the tripping structure (611) to engage with the buckle structure (621) through the first linkage mechanism (61).

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