An electrical leakage circuit breaker

Abstract

The application provides a leakage circuit breaker, relates to the technical field of switches, and is used for improving the use reliability of the leakage circuit breaker and improving the power safety. The leakage circuit breaker comprises a shell, a static contact, a dynamic contact, a first driving structure and a second driving structure, the dynamic contact has a contact position and a separation position relative to the shell, and the linkage shaft of the first driving structure moves synchronously with the dynamic contact. The linkage shaft has a first position and a second position relative to the shell, the dynamic contact is in the contact position when the linkage shaft is in the first position. The dynamic contact is in the separation position when the linkage shaft is in the second position. The driving limiting piece of the second driving structure has a driving position and a limiting position relative to the shell. The driving limiting piece allows the linkage shaft to switch between the first position and the second position when the driving limiting piece is in the driving position, the linkage shaft is in the second position when the driving limiting piece is in the limiting position, and the driving limiting piece limits the switching of the linkage shaft from the second position to the first position.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch, in particular to a residual current circuit breaker. BACKGROUND

[0002] The residual current circuit breaker generally comprises a residual current protection module and a circuit breaker body, the circuit breaker body comprises a handle, a movable contact and a static contact. When the movable contact is in contact with the static contact, the handle is in a closed position, the residual current circuit breaker is closed, and the circuit in which the residual current circuit breaker is connected is turned on. When a residual current phenomenon occurs in the circuit in which the residual current circuit breaker is connected, the operating mechanism of the residual current protection module is actuated to drive the movable contact to rotate away from the static contact, the residual current circuit breaker is opened, and the circuit in which the residual current circuit breaker is connected is disconnected, at this time, the handle is in an open position.

[0003] In the prior art, when it is necessary to close the residual current circuit breaker after the residual current is removed, the handle on the circuit breaker body can be directly operated to switch the handle from the open position to the closed position, and further, the movable contact is in contact with the static contact.

[0004] At this time, the residual current protection module can still be in an open state. That is, when the circuit breaker body is in a closed state, the residual current protection module is still in an open state.

[0005] In this case, when a residual current phenomenon occurs again, the residual current protection module cannot drive the circuit breaker body to be disconnected, and there is a safety hazard. SUMMARY

[0006] The present application provides a residual current circuit breaker, which is used to improve the use reliability of the residual current circuit breaker and improve the safety of electricity use.

[0007] In order to achieve the above object, the application provides a leakage circuit breaker, comprising a shell, a static contact, a dynamic contact, a first driving structure and a second driving structure, wherein the static contact is arranged on the shell. The dynamic contact is arranged on the shell in a rotating manner. The dynamic contact has a contact position and a disengagement position relative to the shell. When the dynamic contact is in the contact position, the dynamic contact is in contact with the static contact. When the dynamic contact is in the disengagement position, the dynamic contact is disengaged from the static contact. The dynamic contact is arranged on a driving end of the first driving structure, and the first driving structure is used to drive the dynamic contact to rotate and switch between the contact position and the disengagement position. The first driving structure has a linkage shaft, and the linkage shaft moves synchronously with the dynamic contact. The linkage shaft has a first position and a second position relative to the shell. When the linkage shaft is in the first position, the dynamic contact is in the contact position. When the linkage shaft is in the second position, the dynamic contact is in the disengagement position. The second driving structure is arranged on the shell, and the second driving structure comprises a driving limiting piece. The driving limiting piece has a driving position and a limiting position relative to the shell. When the driving limiting piece is in the driving position, the linkage shaft is allowed to switch between the first position and the second position. When there is a leakage current in a circuit in which the leakage circuit breaker is located, the driving limiting piece drives the linkage shaft to rotate and switch from the first position to the second position. When the driving limiting piece is in the limiting position, the linkage shaft is in the second position, and the driving limiting piece limits the linkage shaft to switch from the second position to the first position.

[0008] When the above technical scheme is adopted, the driving limiting piece has the driving position and the limiting position relative to the shell. When the driving limiting piece is in the driving position, and when there is a leakage current in a circuit in which the leakage circuit breaker is located, the driving limiting piece can drive the linkage shaft to rotate and switch from the first position to the second position, and further drive the dynamic contact to rotate and switch from the contact position to the disengagement position. In this way, when there is a leakage current in a circuit in which the leakage circuit breaker is located, the current in the circuit in which the leakage circuit breaker is located can be cut off in time, so as to avoid causing human body electric shock or causing electric spark or even fire and other serious consequences.

[0009] Furthermore, when there is a leakage current in a circuit in which the leakage circuit breaker is located, the linkage shaft can be driven to rotate and switch from the first position to the second position under the action of the second driving structure. That is, under the action of the second driving structure, the driving limiting piece is in the limiting position, the linkage shaft is in the second position, and the dynamic contact is switched from the contact position to the disengagement position. After that, the driving limiting piece can limit the linkage shaft to switch from the second position to the first position.

[0010] At this time, under the action of the second driving structure, the linkage shaft cannot switch from the second position to the first position. Further, the dynamic contact cannot switch from the disengagement position to the contact position. That is to say, because of the blocking and limiting of the driving limiting piece in the limiting position, even if an operator operates the first driving structure, the dynamic contact cannot be switched from the disengagement position to the contact position.

[0011] When the leakage current appears again in the circuit where the leakage circuit breaker is located, the second driving structure can be controlled, so that the driving limit piece is switched from the driving position to the limiting position. In the process of switching the driving limit piece from the driving position to the limiting position, the driving limit piece can drive the linkage shaft to rotate and switch from the first position to the second position.

[0012] The leakage circuit breaker provided by the embodiments of the present application can avoid the phenomenon that the operator directly operates the first driving structure to connect the circuit where the leakage circuit breaker is located when the leakage phenomenon occurs once. When the leakage phenomenon occurs again in the leakage circuit breaker, the second driving structure cannot drive the linkage shaft to rotate and switch from the first position to the second position. The use reliability of the leakage circuit breaker can be improved, and the electrical safety can be improved.

[0013] In a possible implementation, the leakage circuit breaker further includes a detection module and a control module. The detection module is configured to detect the leakage current of the circuit where the leakage circuit breaker is located, and generate a leakage current signal. The control module is electrically connected with the detection module and the second driving structure. The control module is configured to receive the leakage current signal, and control the second driving structure to act according to the leakage current signal.

[0014] When the above technical solution is adopted, the detection module and the control module can be provided, so that the leakage current in the circuit where the leakage circuit breaker is located can be found in time. When the leakage current is large, the circuit can be cut off in time, so as to play a protection and monitoring role, and the electrical safety can be improved.

[0015] In a possible implementation, the driving limit piece includes a driving part and a limiting part. When the linkage shaft is in the first position, the linkage shaft is in contact with the driving part. When the leakage current exists in the circuit where the leakage circuit breaker is located, the driving assembly included in the second driving structure drives the driving limit piece to switch from the driving position to the limiting position. The driving part is configured to drive the linkage shaft to switch from the first position to the second position. When the driving limit piece is in the limiting position, the limiting part is in contact with the linkage shaft in the second position. The limiting part is configured to limit the linkage shaft to switch from the second position to the first position.

[0016] When the driving position of the driving limiting piece is switched to the limiting position, the driving part drives the linkage shaft to move upward along the inclined surface, so that the linkage shaft is switched from the first position to the second position, and further, the movable contact is switched from the contact position to the disengagement position.

[0017] Furthermore, when the linkage shaft is in the second position, the linkage shaft is located above the limiting part. The limiting part can prevent the linkage shaft from being switched from the second position to the first position.

[0018] In a possible implementation, the second driving structure further includes a blocking limiting piece and a first elastic piece. The blocking limiting piece is slidingly arranged in the shell and has a limiting hole. The two ends of the first elastic piece are elastically applied to the shell and the blocking limiting piece respectively, so as to apply a force away from the linkage shaft to the blocking limiting piece.

[0019] The driving limiting piece further includes a protruding part matched with the limiting hole. When the driving limiting piece is in the driving position, the protruding part extends into the limiting hole. When the driving limiting piece is in the limiting position, the protruding part is out of the limiting hole and is limited on the wall surface of the blocking limiting piece.

[0020] The shell has a containing cavity. The driving assembly includes an electric leakage release coil, a movable core and a second elastic piece. The electric leakage release coil is arranged in the containing cavity. The movable core is axially sleeved in the electric leakage release coil, and the driving limiting piece is arranged at one end of the movable core. When there is an electric leakage current in the circuit where the electric leakage circuit breaker is located, the movable core drives the driving limiting piece to be switched from the driving position to the limiting position. The second elastic piece is arranged in the containing cavity. The two ends of the second elastic piece are elastically applied to the shell and the movable core respectively, so as to apply a force close to the linkage shaft to the movable core.

[0021] When the electric leakage circuit breaker is in the closed state, the linkage shaft is in the first position. The movable core has a force close to the linkage shaft under the action of the second elastic piece. The driving limiting piece is in the driving position. The protruding part extends into the limiting hole, and the driving part is in contact with the linkage shaft.

[0022] When the leakage occurs in the circuit where the leakage circuit breaker is located, the detection module can monitor the leakage current of the circuit where the leakage circuit breaker is located and generate a leakage current signal. The control module compares the leakage current signal with the pre-stored leakage current threshold value. When the leakage current detected by the detection module is greater than the leakage current threshold value, the leakage release coil is energized to generate a magnetic field force to drive the moving iron core to move towards the second elastic member, so that the second elastic member is further compressed. At the same time, the moving iron core drives the driving limiting member to move towards the second elastic member, so that the driving limiting member is switched from the driving position to the limiting position.

[0023] During the switching of the driving limiting member from the driving position to the limiting position, the protruding portion is out of the limiting hole, and the blocking limiting member is blocked from moving away from the linkage shaft under the action of the first elastic member. At the same time, the linkage shaft moves upward along the slope of the driving portion, driving the linkage shaft to switch from the first position to the second position.

[0024] At this time, the moving contact is switched from the contact position to the disengagement position, the circuit current of the leakage circuit breaker is disconnected, and the leakage circuit breaker is in the open state. At the same time, the leakage release coil is de-energized, the electromagnetic force disappears, and the moving iron core has a force to approach the linkage shaft under the action of the second elastic member. Further, the protruding portion of the driving limiting member has a force to approach the linkage shaft, and the protruding portion is blocked on the wall surface of the blocking limiting member, the driving limiting member is in the limiting position, and the limiting portion blocks the linkage shaft from switching from the second position to the first position,

[0025] In a possible implementation, when the driving limiting member is in the limiting position, one end of the blocking limiting member protrudes out of the shell.

[0026] When the above technical solution is adopted, the blocking limiting member partially extends out of the shell, which facilitates informing the operator that the leakage circuit breaker is tripped and disconnected due to the leakage fault, and the leakage fault needs to be investigated.

[0027] In a possible implementation, the detection module includes a zero sequence current transformer, which is used to detect the leakage current of the circuit where the leakage circuit breaker is located and generate a leakage current signal.

[0028] In a possible implementation, the first driving structure includes a handle, a connecting rod, a support frame, a lock catch assembly, and a contact support. The handle is rotationally arranged in the shell. The handle has an open position and a closed position relative to the shell. When the handle is in the open position, the moving contact is in the disengagement position. When the handle is in the closed position, the moving contact is in the contact position. One end of the connecting rod is rotationally connected to the handle. The support frame is rotationally arranged in the shell. The lock catch assembly is rotationally arranged in the support frame. The other end of the connecting rod is rotationally arranged in the lock catch assembly. The linkage shaft is arranged in the lock catch assembly in a following manner. The contact support is arranged in the support frame in a following manner, and the moving contact is arranged in the contact support in a following manner.

[0029] When the handle is rotated, one end of the connecting rod connected with the handle is rotated with the handle, and the other end of the connecting rod connected with the lock assembly is changed relative to the position of the housing, and the lock assembly is rotated relative to the housing. The linkage shaft is synchronously rotated relative to the housing. When the handle is continuously rotated, the support frame is driven to rotate relative to the housing, and the movable contact is further driven to move towards or away from the static contact, so that the movable contact is switched between the contact position and the disengagement position.

[0030] In a possible implementation, the first driving structure further includes a third elastic member arranged in the housing. Two ends of the third elastic member are elastically applied to the support frame and the contact support, respectively, to apply a torsion force to the movable contact towards the static contact.

[0031] When the above technical solution is adopted, the movable contact and the static contact are elastically contacted, and the stability of the contact between the movable contact and the static contact can be improved.

[0032] In a possible implementation, the lock assembly includes a jump buckle and a lock buckle. The jump buckle is rotationally arranged in the support frame. The other end of the connecting rod is rotationally arranged in the jump buckle. The lock buckle is rotationally arranged in the support frame. The lock buckle has a locking portion. One end of the locking portion is located on the rotation track of the jump buckle. The linkage shaft is arranged in the lock buckle in a follow-up manner.

[0033] In a possible implementation, the first driving structure further includes a rotating shaft and a fourth elastic member. The rotating shaft is arranged in the housing. The axis of the rotating shaft is collinear with the rotation axis of the support frame. Two ends of the fourth elastic member are elastically applied to the rotating shaft and the lock buckle, respectively, to apply a force to the locking portion towards the jump buckle.

[0034] When the above technical solution is adopted, the stability of the lock buckle and the jump buckle when locked can be ensured, and the firmness of the contact between the movable contact and the static contact can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A schematic view of the ground fault circuit breaker provided by the embodiment of the present application Figure 1 .

[0036] Figure 2 A schematic view of the ground fault circuit breaker provided by the embodiment of the present application Figure 2 .

[0037] Figure 3 A partial schematic view of the ground fault circuit breaker provided by the embodiment of the present application in a disconnected state Figure 1 .

[0038] Figure 4 A partial schematic view of the ground fault circuit breaker provided by the embodiment of the present application in a closed state Figure 1 .

[0039] Figure 5 Partial view of the leakage circuit breaker in the open state according to an embodiment of the present application Figure 2 .

[0040] Figure 6 Partial view of the leakage circuit breaker in the open state according to an embodiment of the present application Figure 3 .

[0041] Figure 7 Partial view of the leakage circuit breaker in the closed state according to an embodiment of the present application Figure 2 .

[0042] Figure 8 Partial view of the leakage circuit breaker in the open state according to an embodiment of the present application

[0043] Figure 9 Schematic view of the driving limiting member in an example according to an embodiment of the present application

[0044] Figure 10 Schematic view of the blocking limiting member according to an embodiment of the present application

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 1 - housing, 12 - first housing, 13 - second housing, 2 - static contact, 3 - dynamic contact, 4 - first driving structure,

[0047] 41 - linkage shaft, 42 - handle, 43 - connecting rod, 44 - support frame, 45 - lock catch assembly, 451 - lock catch, 452 - jump catch,

[0048] 46 - contact support, 47 - third elastic member, 48 - rotating shaft, 49 - fourth elastic member, 5 - second driving structure,

[0049] 51 - driving assembly, 511 - leakage tripping coil, 512 - moving iron core, 513 - second elastic member, 52 - driving limiting member,

[0050] 521 - driving part, 522 - limiting part, 523 - protruding part, 53 - blocking limiting member, 531 - limiting hole. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "including," "comprising," "having" and "with" and variations thereof in the specification and claims herein is intended to be open, and mean that the addition of further items is optional and does not exclude other items.

[0053] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those of skill in the art will understand that embodiments described herein can be combined with one another.

[0054] The positional words appearing in the following description are the directions shown in the drawings, and do not limit the specific structure of the leakage circuit breaker of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0055] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not used to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0056] In the description of the present application, unless otherwise specified, "a plurality of" means two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0057] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "linking" should be understood in a broad sense, for example, the "connection" or "linking" of mechanical structures can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection by spacer, for example, fixed connection by screws, bolts or other spacers; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] Referring to Figures 1 to 6 As shown in the drawings, the present application provides a leakage circuit breaker, comprising a shell 1, a static contact 2, a moving contact 3, a first driving structure 4 and a second driving structure 5, wherein the static contact 2 is arranged on the shell 1.

[0059] In specific implementation, the shell 1 can include adjacent first shell 12 and second shell 13, and the first shell 12 and the second shell 13 can be fixed together by bonding, welding or clamping connection and the like.

[0060] Of course, in practice, the connection mode between the first shell 12 and the second shell 13 is not limited to this.

[0061] In addition, the material and specific structure of the first shell 12 and the second shell 13 are not specifically limited here.

[0062] Among them, the static contact 2, the moving contact 3 and the first driving structure 4 are mounted on the first shell 12, as Figures 3 to 5 As shown. The second driving structure 5 is mounted on the second shell 13, as Figure 6 And Figure 7 As shown.

[0063] Specifically, the static contact 2 can be fixedly mounted in the first shell 12, and the static contact 2 can be fixedly mounted on the first shell 12 by welding, bonding or screw and the like. The structure of the static contact 2 is not specifically limited here, and is subject to the actual situation.

[0064] The moving contact 3 is rotatably arranged in the shell 1, and in practice, the moving contact 3 is rotatably arranged in the cavity of the first shell 12. The moving contact 3 can rotate relative to the shell 1, and in the process of rotating relative to the shell 1, the moving contact 3 has a contact position and a disengagement position relative to the shell 1.

[0065] When the moving contact 3 is in the contact position, the moving contact 3 contacts the static contact 2, as Figure 4 As shown, at this time, the leakage circuit breaker provided by the present application is in a closed state.

[0066] When the movable contact 3 is in the disengaged position, the movable contact 3 is disengaged from the stationary contact 2, as shown in FIG. 2. At this time, the leakage circuit breaker provided by the embodiments of the present application is in the open state. Figure 3

[0067] Please refer to FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the first driving structure 4 is installed on the first housing 12. The movable contact 3 is arranged at the driving end of the first driving structure 4, and the first driving structure 4 is used to drive the movable contact 3 to rotate and switch between the contact position and the disengaged position. Figure 3 Figure 4 The first driving structure 4 can drive the movable contact 3 to rotate relative to the housing 1. When the first driving structure 4 drives the movable contact 3 to rotate in the direction close to the stationary contact 2 until the movable contact 3 contacts the stationary contact 2, the movable contact 3 is in the contact position. When the first driving structure 4 drives the movable contact 3 to rotate in the direction away from the stationary contact 2 until the movable contact 3 is disengaged from the stationary contact 2, the movable contact 3 is in the disengaged position.

[0068] In a possible implementation, please continue to refer to FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the first driving structure 4 has a linkage shaft 41, and the linkage shaft 41 moves synchronously with the movable contact 3. When the movable contact 3 rotates relative to the housing 1, the linkage shaft 41 and the movable contact 3 rotate synchronously relative to the housing 1.

[0069] In a possible implementation, please continue to refer to FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the first driving structure 4 has a linkage shaft 41, and the linkage shaft 41 moves synchronously with the movable contact 3. When the movable contact 3 rotates relative to the housing 1, the linkage shaft 41 and the movable contact 3 rotate synchronously relative to the housing 1. Figure 3 Figure 4 During the rotation of the linkage shaft 41 relative to the housing 1, the linkage shaft 41 has a first position and a second position relative to the housing 1. As shown in FIG. 1 and FIG. 2, when the linkage shaft 41 is in the first position, the movable contact 3 is in the contact position. As shown in FIG. 3 and FIG. 4, when the linkage shaft 41 is in the second position, the movable contact 3 is in the disengaged position.

[0070] During the rotation of the linkage shaft 41 relative to the housing 1, the linkage shaft 41 has a first position and a second position relative to the housing 1. As shown in FIG. 1 and FIG. 2, when the linkage shaft 41 is in the first position, the movable contact 3 is in the contact position. As shown in FIG. 3 and FIG. 4, when the linkage shaft 41 is in the second position, the movable contact 3 is in the disengaged position. Figure 4 Figure 3 Specifically, taking the placement orientation shown in FIG. 1 and FIG. 2 as an example, during the switching of the linkage shaft 41 from the second position to the first position, i.e., during the switching of the linkage shaft 41 from the position shown in FIG. 3 to the position shown in FIG. 4, the linkage shaft 41 rotates clockwise, and the movable contact 3 rotates synchronously clockwise, and the movable contact 3 switches from the disengaged position to the contact position.

[0071] Specifically, taking the placement orientation shown in FIG. 1 and FIG. 2 as an example, during the switching of the linkage shaft 41 from the second position to the first position, i.e., during the switching of the linkage shaft 41 from the position shown in FIG. 3 to the position shown in FIG. 4, the linkage shaft 41 rotates clockwise, and the movable contact 3 rotates synchronously clockwise, and the movable contact 3 switches from the disengaged position to the contact position. Figure 3 Figure 4 Specifically, taking the placement orientation shown in FIG. 1 and FIG. 2 as an example, during the switching of the linkage shaft 41 from the second position to the first position, i.e., during the switching of the linkage shaft 41 from the position shown in FIG. 3 to the position shown in FIG. 4, the linkage shaft 41 rotates clockwise, and the movable contact 3 rotates synchronously clockwise, and the movable contact 3 switches from the disengaged position to the contact position. Figure 3 Figure 4 It can be understood that the movable contact 3 is switched between the contact position and the disengaged position under the action of the first driving structure 4. The linkage shaft 41 belongs to the first driving structure 4, and the linkage shaft 41 moves synchronously with the movable contact 3. Therefore, the movement of the linkage shaft 41 can be controlled to realize the movement control of the movable contact 3.

[0072] It can be understood that the movable contact 3 is switched between the contact position and the disengaged position under the action of the first driving structure 4. The linkage shaft 41 belongs to the first driving structure 4, and the linkage shaft 41 moves synchronously with the movable contact 3. Therefore, the movement of the linkage shaft 41 can be controlled to realize the movement control of the movable contact 3.

[0073] ​​​​​​Specifically, when the movable contact 3 is in the contact position and the linkage shaft 41 is in the first position, the linkage shaft 41 can be controlled in a manner that the linkage shaft 41 is switched from the first position to the second position, so as to switch the movable contact 3 from the contact position to the disengagement position.

[0074] The second driving structure 5 is arranged on the shell 1, and specifically, the second driving structure 5 is arranged on the second shell 13. In fact, one end of the linkage shaft 41 extends into the cavity of the second shell 13 after passing through the first shell 12, so that the second driving structure 5 is in contact with the linkage shaft 41, and the second driving structure 5 is drivingly connected with the linkage shaft 41.

[0075] It should be noted that the second driving structure 5 is drivingly connected with the linkage shaft 41, that is, the second driving structure 5 can drive the linkage shaft 41 to rotate relative to the shell 1, so that the linkage shaft 41 is switched from the first position to the second position, and further drives the movable contact 3 to switch from the contact position to the disengagement position.

[0076] In fact, the driving limiting piece 52 has a driving position and a limiting position relative to the shell 1. When the driving limiting piece 52 is in the driving position and there is a leakage current in the circuit in which the leakage circuit breaker is located, the driving limiting piece 52 can drive the linkage shaft 41 to switch from the first position to the second position, and further drive the movable contact 3 to switch from the contact position to the disengagement position. In this way, when a leakage current occurs in the circuit in which the leakage circuit breaker is located, the current in the circuit in which the leakage circuit breaker is located can be cut off in time, so as to avoid causing human body electric shock or causing electric spark or even fire and other serious consequences.

[0077] Moreover, when there is a leakage current in the circuit in which the leakage circuit breaker is located, the linkage shaft 41 can be driven to switch from the first position to the second position under the action of the second driving structure 5. That is, under the action of the second driving structure 5, the driving limiting piece 52 is in the limiting position, the linkage shaft 41 is in the second position, and the movable contact 3 is switched from the contact position to the disengagement position, and the driving limiting piece 52 can limit the linkage shaft 41 from switching from the second position to the first position.

[0078] At this time, under the limiting action of the second driving structure 5, the linkage shaft 41 cannot switch from the second position to the first position. Further, the movable contact 3 cannot switch from the disengagement position to the contact position. That is, because the driving limiting piece 52 in the limiting position is blocked and limited, even if an operator operates the first driving structure 4, the movable contact 3 cannot be switched from the disengagement position to the contact position.

[0079] Of course, in actual situation, the operator can operate the second driving structure 5, so that the driving limiting piece 52 is switched from the limiting position to the driving position. When the driving limiting piece 52 is in the driving position, the linkage shaft 41 is allowed to be switched between the first position and the second position. At this time, the operator can directly operate the first driving structure 4, so that the movable contact 3 is switched from the disengagement position to the contact position, so that the circuit current of the residual current circuit breaker is turned on. In addition, when the driving limiting piece 52 is in the driving position, the operator can also directly operate the first driving structure 4, so that the movable contact 3 is switched from the contact position to the disengagement position, without being interfered by the driving limiting piece 52.

[0080] When the circuit in which the residual current circuit breaker is located again has a leakage current, the second driving structure 5 can be controlled, so that the driving limiting piece 52 is switched from the driving position to the limiting position. In the process of switching the driving limiting piece 52 from the driving position to the limiting position, the driving limiting piece 52 can drive the linkage shaft 41 to be switched from the first position to the second position.

[0081] It can be understood that, in the embodiments provided in the present application, when the movable contact 3 is in the contact position, the linkage shaft 41 is in the first position, and the driving limiting piece 52 is in the driving position. Accordingly, when the movable contact 3 is in the disengagement position, the linkage shaft 41 is in the second position, and the driving limiting piece 52 is in the limiting position.

[0082] The residual current circuit breaker provided in the embodiments of the present application needs to control the second driving structure 5 first, so that the driving limiting piece 52 is switched from the limiting position to the driving position, and then operate the first driving structure 4 to control the movable contact 3 to be switched from the disengagement position to the contact position to turn on the current of the circuit in which the residual current circuit breaker is located, when the leakage phenomenon occurs and needs to start the residual current circuit breaker again. When a leakage phenomenon occurs once, the phenomenon that the operator directly operates the first driving structure 4 to turn on the circuit in which the residual current circuit breaker is located, and the second driving structure 5 cannot drive the linkage shaft 41 to be switched from the first position to the second position when the residual current circuit breaker has a leakage phenomenon again can be avoided. The use reliability of the residual current circuit breaker can be improved, and the safety of electricity use can be improved.

[0083] In some embodiments, the residual current circuit breaker provided in the embodiments of the present application further includes a detection module and a control module. The detection module is used to detect the leakage current of the circuit in which the residual current circuit breaker is located, and generate a leakage current signal. The control module is electrically connected with the detection module and the second driving structure 5. The control module is used to receive the leakage current signal, and control the second driving structure 5 to act according to the leakage current signal.

[0084] In specific implementation, the detection module and the control module are electrically connected, and the control module is also electrically connected with the second driving structure 5. When a leakage fault occurs in the circuit in which the leakage circuit breaker is located, the detection module can detect the leakage current and generate a leakage current signal based on the leakage current. Since the detection module is electrically connected with the control module, the detection module can transmit the leakage current signal to the control module. After receiving the leakage current signal, the control module compares the leakage current signal with a pre-stored leakage current threshold. When the leakage current detected by the detection module is greater than the leakage current threshold, the control module sends a control signal to the second driving structure 5 to control the second driving structure 5 to act, so that the driving limiting piece 52 is switched from the driving position to the limiting position. The driving limiting piece 52 can drive the linkage shaft 41 to be switched from the first position to the second position, so that the movable contact 3 is switched from the contact position to the disengagement position, and the current of the circuit in which the leakage circuit breaker is located is disconnected.

[0085] The arrangement of the detection module and the control module can timely detect the leakage current in the circuit in which the leakage circuit breaker is located, and when the leakage current is large, the circuit can be timely disconnected, thereby playing a protection and monitoring role and improving the electrical safety.

[0086] In specific implementation, the detection module can include a zero sequence current transformer, which is configured to detect the leakage current of the circuit in which the leakage circuit breaker is located and generate a leakage current signal.

[0087] As a possible implementation manner, as shown in Figures 6 to 9 The driving limiting piece 52 includes a driving part 521 and a limiting part 522. When the linkage shaft 41 is in the first position, the linkage shaft 41 is in contact with the driving part 521. When there is a leakage current in the circuit in which the leakage circuit breaker is located, the driving assembly 51 included in the second driving structure 5 drives the driving limiting piece 52 to be switched from the driving position to the limiting position, and the driving part 521 is configured to drive the linkage shaft 41 to be switched from the first position to the second position.

[0088] When the driving limiting piece 52 is in the limiting position, the limiting part 522 is in contact with the linkage shaft 41 in the second position, and the limiting part 522 is configured to limit the linkage shaft 41 to be switched from the second position to the first position, as shown in Figure 6 .

[0089] In specific implementation, as shown in Figures 6 to 9 The driving limiting piece 52 further includes a supporting part, which is fixedly installed at the driving end of the driving assembly 51. The surface of the driving part 521, which is configured to be in contact with the linkage shaft 41, is an inclined surface, and the inclined surface is inclined upward from the supporting part to the driving part 521.

[0090] As shown in Figure 7 The leakage circuit breaker is in a closed state, and the linkage shaft 41 is in the first position. At this time, the linkage shaft 41 is in contact with the driving part 521, and the linkage shaft 41 is in contact with the lower end of the inclined surface.

[0091] When the leakage phenomenon occurs, the control module controls the driving assembly 51 to drive the driving limiting piece 52 to move along the direction from the driving part 521 to the supporting part, that is, the driving assembly 51 drives the driving limiting piece 52 to move to the left, so that the driving limiting piece 52 is switched from the driving position as shown in Figure 7 to the limiting position as shown in Figure 6 During the switching of the driving limiting piece 52 from the driving position to the limiting position, the driving part 521 drives the linkage shaft 41 to move upward along the inclined surface, so that the linkage shaft 41 is switched from the first position as shown in Figure 7 and Figure 4 to the second position as shown in Figure 6 and Figure 3 Further, the movable contact 3 is switched from the contact position as shown in Figure 4 to the disengagement position as shown in Figure 3 .

[0092] Further, as shown in Figure 6 , when the linkage shaft 41 is in the second position, the linkage shaft 41 is located above the limiting part 522. The limiting part 522 can prevent the linkage shaft 41 from being switched from the second position to the first position.

[0093] In addition, it should be noted that, as shown in Figure 7 , when the driving limiting piece 52 is in the driving position, the linkage shaft 41 is allowed to be switched between the first position and the second position.

[0094] In specific implementation, the supporting part can be a plate-shaped structure, and the limiting part 522 can be a boss provided on the top of the driving part 521, of course, the actual implementation is not limited thereto.

[0095] In an example, the driving assembly 51 can be a mechanical structure capable of reciprocating motion, for example, a linear module or a driving cylinder, etc.

[0096] When the driving assembly 51 is a linear module, the track of the linear module can be mounted on the second housing 13, and the driving limiting piece 52 can be indirectly or directly mounted on the slider of the linear module. When the leakage current occurs in the circuit where the leakage circuit breaker is located, the control module controls the linear module to start, and drives the driving limiting piece 52 to move along the direction from the driving part 521 to the supporting part through the slider, so that the driving limiting piece 52 is switched from the driving position to the limiting position.

[0097] When the leakage phenomenon is investigated and the leakage circuit breaker needs to be started again, the control module can control the linear module to start, and drive the driving limiting piece 52 to move along the direction from the supporting part to the driving part 521 through the slider, so that the driving limiting piece 52 is switched from the limiting position to the driving position.

[0098] At this time, the first driving structure can be controlled to drive the movable contact 3 from the disengagement position to the contact position, thereby connecting the current of the circuit in which the leakage circuit breaker is located.

[0099] When the driving assembly 51 is a driving cylinder, the cylinder body of the driving cylinder can be mounted on the second housing 13, and the driving limiting piece 52 can be indirectly or directly mounted on the telescopic end of the driving cylinder. When leakage current occurs in the circuit in which the leakage circuit breaker is located, the control module controls the driving cylinder to start, specifically, controls the telescopic end of the driving cylinder to retract, so that the driving limiting piece 52 is switched from the driving position to the limiting position.

[0100] When the leakage phenomenon is investigated, the control module can control the driving cylinder to start, specifically, controls the telescopic end of the driving cylinder to extend, so that the driving limiting piece 52 is switched from the limiting position to the driving position.

[0101] At this time, the first driving structure can be controlled to drive the movable contact 3 from the disengagement position to the contact position, thereby connecting the current of the circuit in which the leakage circuit breaker is located.

[0102] In the embodiments provided in the present application, as shown in Figures 6 to 10 The second driving structure 5 further includes a blocking limiting piece 53 and a first elastic piece, the blocking limiting piece 53 is slidingly arranged in the housing 1, and the blocking limiting piece 53 has a limiting hole 531.

[0103] Specifically, the blocking limiting piece 53 can be slidingly arranged in the second housing 13. An installation groove can be formed on the second housing 13, the installation groove is in communication with the cavity of the second housing 13, and the first elastic piece and the blocking limiting piece 53 are arranged in the installation groove.

[0104] The first elastic piece can be a spring or the like, of course, which is only an example and is not specifically limited. The first elastic piece is in a compressed state.

[0105] It should be noted that, as shown in Figures 6 to 8 When the driving limiting piece 52 is switched between the driving position and the limiting position, the movement direction is perpendicular to the axis extension direction of the linkage shaft 41. When the blocking limiting piece 53 slides relative to the housing 1, the sliding direction of the blocking limiting piece 53 is perpendicular to the movement direction of the driving limiting piece 52 and the axis extension direction of the linkage shaft 41. That is, the sliding direction of the blocking limiting piece 53, the movement direction of the driving limiting piece 52 and the axis extension direction of the linkage shaft 41 are perpendicular to each other.

[0106] The two ends of the first elastic piece are elastically applied to the housing 1 and the blocking limiting piece 53 respectively, for applying a force away from the linkage shaft 41 to the blocking limiting piece 53.

[0107] The drive limiting member 52 also includes a protrusion 523 that mates with the limiting hole 531. When the drive limiting member 52 is in the driving position, the protrusion 523 extends into the limiting hole 531, and the driving part 521 contacts the linkage shaft 41. When the drive limiting member 52 is in the limiting position, the protrusion 523 disengages from the limiting hole 531 and abuts against and is limited on the wall surface of the blocking limiting member 53, and the limiting part 522 contacts the linkage shaft 41 in the second position.

[0108] Thus, when the drive limiting member 52 is in the drive position, the protrusion 523 extends into the limiting hole 531, causing the drive part 521 to contact the linkage shaft 41, such as... Figure 7 As shown. When the drive limiting member 52 is in the restricted position, the protrusion 523 disengages from the limiting hole 531. At this time, the blocking limiting member 53 slides away from the linkage shaft 41 under the action of the first elastic member, so as to... Figure 6 and Figure 7 Taking the indicated orientation as an example, the blocking and limiting member 53 moves upward under the action of the first elastic member. This causes the protrusion 523 to be misaligned with the limiting hole 531, and the protrusion 523 abuts against and is limited on the wall surface of the blocking and limiting member 53. The limiting part 522 contacts the linkage shaft 41 in the second position, as shown. Figure 6 As shown.

[0109] Furthermore, such as Figures 6 to 8 As shown, the housing 1 has a receiving cavity. The drive assembly 51 includes a leakage current trip coil 511, a moving iron core 512, and a second elastic member 513. The leakage current trip coil 511 is disposed within the receiving cavity, and the drive limiting member 52 is disposed at one end of the moving iron core 512. Specifically, the drive limiting member 52 is located outside the receiving cavity, and one end of the moving iron core 512 extends out of the receiving cavity. A support is fixedly installed on the end of the moving iron core 512 that extends out of the receiving cavity.

[0110] The moving iron core 512 is axially sleeved within the leakage current trip coil 511. When leakage current exists in the circuit where the leakage current circuit breaker is located, the moving iron core 512 drives the drive limiting member 52 to switch from the driving position to the limiting position. The second elastic member 513 is disposed in the receiving cavity, and its two ends elastically act on the housing 1 and the moving iron core 512 respectively, for applying a force close to the linkage shaft 41 to the moving iron core 512.

[0111] At this time, as Figure 7 As shown, when the residual current circuit breaker provided in this embodiment is in the closed state, the linkage shaft 41 is located in the first position. Under the action of the second elastic member 513, the moving iron core 512 has a force that moves closer to the linkage shaft 41, the driving limiting member 52 is in the driving position, the protrusion 523 extends into the limiting hole 531, and the driving part 521 contacts the linkage shaft 41.

[0112] When the leakage occurs in the circuit where the leakage circuit breaker is located, the detection module can detect the leakage current of the circuit where the leakage circuit breaker is located and generate a leakage current signal, and transmit the leakage current signal to the control module. The control module compares the leakage current signal with the pre-stored leakage current threshold value after receiving the leakage current signal.

[0113] When the leakage current detected by the detection module is greater than the leakage current threshold value, the leakage release coil 511 is powered on to generate a magnetic field force, which drives the moving iron core 512 to move towards the second elastic member 513, so that the second elastic member 513 is further compressed. At the same time, the moving iron core 512 drives the driving limiting member 52 to move towards the second elastic member 513, so that the driving limiting member 52 is switched from the driving position to the limiting position.

[0114] In the process of switching the driving limiting member 52 from the driving position to the limiting position, the protruding part 523 is out of the limiting hole 531, and the blocking limiting member 53 is blocked from moving away from the linkage shaft 41 under the action of the first elastic member. At the same time, the linkage shaft 41 moves upward along the slope of the driving part 521, driving the linkage shaft 41 to switch from the first position to the second position.

[0115] At this time, the moving contact 3 is switched from the contact position to the disengagement position, the current of the circuit where the leakage circuit breaker is located is disconnected, and the leakage circuit breaker is in the open state. At the same time, the leakage release coil 511 is powered off, the electromagnetic force disappears, and the moving iron core 512 has a force to move towards the linkage shaft 41 under the action of the second elastic member 513. Further, the protruding part 523 of the driving limiting member 52 has a force to move towards the linkage shaft 41, and the protruding part 523 is blocked on the wall surface of the blocking limiting member 53, so that the driving limiting member 52 is in the limiting position, and the limiting part 522 blocks the linkage shaft 41 from switching from the second position to the first position, as shown in Figure 6

[0116] After the investigation is completed, when the leakage circuit breaker needs to be started again, the blocking limiting member 53 can be pressed to further compress the first elastic member. When the limiting hole 531 is aligned with the protruding part 523, the protruding part 523 extends into the limiting hole 531, the driving limiting member 52 is in the driving position, the limiting part 522 releases the limitation of the linkage shaft 41, and the linkage shaft 41 is allowed to switch between the first position and the second position.

[0117] In this case, the first driving structure 4 can be controlled to drive the moving contact 3 to switch from the disengagement position to the contact position, so that the circuit where the leakage circuit breaker is located is connected, and the leakage circuit breaker is in the closed state.

[0118] The second elastic member 513 can be a spring or a spring, of course, which is only an example and is not limited. The second elastic member 513 is in a compressed state.

[0119] ​In some embodiments, one end of the blocking limit member 53 protrudes out of the shell 1 when the driving limit member 52 is in the limit position.

[0120] In this way, the blocking limit member 53 partially extends out of the shell 1, which is convenient for informing the operator that the leakage circuit breaker has tripped and opened the circuit due to the leakage fault, and the leakage fault needs to be investigated.

[0121] As a possible implementation, in combination with Figures 3 to 5 As shown in the drawings, the first driving structure 4 includes a handle 42, a connecting rod 43, a support frame 44, a lock catch assembly 45, and a contact support 46. The handle 42 is rotationally arranged in the shell 1. The handle 42 has an open position and a closed position relative to the shell 1. When the handle 42 is in the open position, the movable contact 3 is in the disengaged position, as shown in Figure 3 When the handle 42 is in the closed position, the movable contact 3 is in the contact position, as shown in Figure 4

[0122] One end of the connecting rod 43 is rotationally connected to the handle 42, and the other end of the connecting rod 43 is rotationally arranged in the lock catch assembly 45. In fact, the connecting rod 43 can be a U-shaped structure. A hole is formed in the handle 42 and matched with one end of the connecting rod 43. One end of the connecting rod 43 is rotationally inserted into the hole. Similarly, a hole is formed in the lock catch assembly 45 and matched with the other end of the connecting rod 43. The other end of the connecting rod 43 is rotationally inserted into the hole. When the handle 42 is rotated, the lock catch assembly 45 can be driven to rotate through the action of the connecting rod 43.

[0123] The support frame 44 is rotationally arranged in the shell 1. The lock catch assembly 45 is rotationally arranged in the support frame 44. The linkage shaft 41 is arranged in the lock catch assembly 45 in a following manner, i.e., the linkage shaft 41 moves synchronously with the movement of the lock catch assembly 45. The contact support 46 is arranged in the support frame 44 in a following manner, and the movable contact 3 is arranged in the contact support 46 in a following manner.

[0124] When the handle 42 is rotated, one end of the connecting rod 43 rotationally connected with the handle 42 is rotated with the handle 42. Further, the other end of the connecting rod 43 rotationally connected with the lock catch assembly 45 changes its position relative to the shell 1, and the lock catch assembly 45 rotates relative to the shell 1. The linkage shaft 41 rotates synchronously relative to the shell 1. When the handle 42 is continuously rotated, the support frame 44 is driven to rotate relative to the shell 1, and further, the movable contact 3 is driven to move towards or away from the static contact 2, so that the movable contact 3 is switched between the contact position and the disengaged position.

[0125] Further, as shown in Figure 5 ​As shown, the first drive structure 4 also includes a third elastic element 47, which is disposed in the housing 1. The two ends of the third elastic element 47 elastically act on the support frame 44 and the contact support 46 respectively, and are used to apply a torque to the moving contact 3 to move it toward the stationary contact 2.

[0126] This allows the moving contact 3 to make elastic contact with the stationary contact 2, which can improve the stability of the contact between the moving contact 3 and the stationary contact 2.

[0127] like Figure 3 and Figure 4 As shown, the locking assembly 45 includes a jump catch 452 and a lock 451. The jump catch 452 is rotatably mounted on the support frame 44. The other end of the connecting rod 43 is rotatably mounted on the jump catch 452. The lock 451 is rotatably mounted on the support frame 44 and has a locking part. One end of the locking part is located on the rotation trajectory of the jump catch 452. The linkage shaft 41 is rotatably mounted on the lock 451.

[0128] Also, such as Figures 3 to 5 As shown, the first drive structure 4 also includes a rotating shaft 48 and a fourth elastic element 49. The rotating shaft 48 is disposed on the housing 1, and the third elastic element 47 is sleeved on the outside of the rotating shaft 48. The axis of the rotating shaft 48 is collinear with the axis of rotation of the support frame 44, and the support frame 44 rotates relative to the housing 1 with the rotating shaft 48 as its axis. The two ends of the fourth elastic element 49 elastically act on the rotating shaft 48 and the latch 451 respectively, and are used to apply a force close to the latch 452 to the locking part.

[0129] This ensures the stability of the locking mechanism 451 and the jump lock 452 when locked, and improves the firmness of the contact between the moving contact 3 and the stationary contact 2.

[0130] In practice, when handle 42 is in the open position and the residual current circuit breaker is in the open state, it is necessary to switch the residual current circuit breaker from... Figure 3 The disconnected state shown has been switched to Figure 4 In the closed state, the handle 42 can be rotated clockwise, which drives the trip latch 452 to rotate via the connecting rod 43. After the trip latch 452 locks with the locking part, the support frame 44 can be driven to rotate clockwise relative to the housing 1. At this time, the linkage shaft 41 rotates clockwise. Specifically, the support frame 44 rotates around the rotation shaft 48. When the support frame 44 rotates, under the action of the third elastic element 47, the contact 3 is driven to support the clockwise rotation, and the moving contact 3 is driven to rotate clockwise until the handle 42 is in the closed position, the moving contact 3 is in the contact position, and the linkage shaft 41 is in the first position. At this time, the residual current circuit breaker is in the closed state.

[0131] When the leakage current appears in the circuit where the leakage circuit breaker is located, the second driving structure 5 drives the linkage shaft 41 to switch from the first position to the second position, drives the lock catch 451 to rotate counterclockwise, so that the lock catch 451 is separated from the trip catch 452, the movable contact 3 is in the separated position, and the leakage circuit breaker is in the off state.

Claims

1. An arc fault circuit interrupter, comprising: The leakage circuit breaker comprises: a housing; a static contact provided in the housing; a dynamic contact rotatably provided in the housing; the dynamic contact has a contact position and a disengagement position relative to the housing, the dynamic contact is in contact with the static contact when the dynamic contact is in the contact position, and the dynamic contact is disengaged from the static contact when the dynamic contact is in the disengagement position; a first driving structure, the dynamic contact is provided at a driving end of the first driving structure, and the first driving structure is used to drive the dynamic contact to switch between the contact position and the disengagement position; the first driving structure has a linkage shaft, the linkage shaft moves synchronously with the dynamic contact, the linkage shaft has a first position and a second position relative to the housing, the dynamic contact is in the contact position when the linkage shaft is in the first position, and the dynamic contact is in the disengagement position when the linkage shaft is in the second position; a second driving structure provided in the housing; the second driving structure comprises a driving limiting piece, the driving limiting piece has a driving position and a limiting position relative to the housing; the driving limiting piece allows the linkage shaft to switch between the first position and the second position when the driving limiting piece is in the driving position, and the driving limiting piece drives the linkage shaft to switch from the first position to the second position when there is a leakage current in a circuit in which the leakage circuit breaker is located, the linkage shaft is in the second position when the driving limiting piece is in the limiting position, and the driving limiting piece limits the linkage shaft to switch from the second position to the first position; the driving limiting piece comprises a driving part and a limiting part, the linkage shaft is in contact with the driving part when the linkage shaft is in the first position, the driving part is used to drive the linkage shaft to switch from the first position to the second position when the second driving structure comprises a driving assembly and the driving assembly drives the driving limiting piece to switch from the driving position to the limiting position when there is a leakage current in a circuit in which the leakage circuit breaker is located, the driving limiting piece further comprises a supporting part, the supporting part is fixedly installed at a driving end of the driving assembly, a surface of the driving part for contacting the linkage shaft is an inclined surface, and the inclined surface is inclined upward from the supporting part to the driving part, and the limiting part is in contact with the linkage shaft in the second position when the driving limiting piece is in the limiting position, and the limiting part is used to limit the linkage shaft to switch from the second position to the first position.

2. The ground fault circuit interrupter of claim 1, wherein, The leakage circuit breaker further comprises: a detection module, the detection module is used to detect a leakage current of a circuit in which the leakage circuit breaker is located, and generate a leakage current signal; a control module, the control module is electrically connected with the detection module and the second driving structure, the control module is used to receive the leakage current signal, and control the second driving structure to act according to the leakage current signal.

3. The leakage circuit breaker according to claim 1, wherein: The second driving structure further comprises a blocking limiting member and a first elastic member, the blocking limiting member is slidingly arranged in the shell, and the blocking limiting member has a limiting hole; the two ends of the first elastic member are elastically applied to the shell and the blocking limiting member respectively, and are used for applying an action force away from the linkage shaft to the blocking limiting member; The driving limiting member further comprises a protruding part matched with the limiting hole, when the driving limiting member is in the driving position, the protruding part extends into the limiting hole; when the driving limiting member is in the limiting position, the protruding part is out of the limiting hole and is limited on the wall surface of the blocking limiting member; The shell has a containing cavity, and the driving assembly comprises: A leakage tripping coil arranged in the containing cavity; A moving iron core axially sleeved in the leakage tripping coil; the driving limiting member is arranged at one end of the moving iron core; when there is a leakage current in the circuit where the leakage circuit breaker is located, the moving iron core drives the driving limiting member to switch from the driving position to the limiting position; A second elastic member arranged in the containing cavity; the two ends of the second elastic member are elastically applied to the shell and the moving iron core respectively, and are used for applying an action force close to the linkage shaft to the moving iron core.

4. The ground fault circuit interrupter of claim 3, wherein, When the driving limiting member is in the limiting position, one end of the blocking limiting member protrudes from the shell.

5. The ground fault circuit interrupter of claim 2, wherein, The detection module comprises a zero sequence current transformer, which is used for detecting the leakage current of the circuit where the leakage circuit breaker is located, and generating a leakage current signal.

6. The ground fault circuit interrupter of claim 1, wherein, The first driving structure comprises: A handle rotationally arranged in the shell; the handle has a disconnected position and a closed position relative to the shell, when the handle is in the disconnected position, the movable contact is in the disengaged position; when the handle is in the closed position, the movable contact is in the contact position; A connecting rod, one end of which is rotationally connected to the handle; A support frame rotationally arranged in the shell; A lock catch assembly rotationally arranged in the support frame; the other end of the connecting rod is rotationally arranged in the lock catch assembly; the linkage shaft is arranged in the lock catch assembly in a following manner; A contact support arranged in the support frame in a following manner; the movable contact is arranged in the contact support in a following manner.

7. The ground fault circuit interrupter of claim 6, wherein, The first driving structure further comprises a third elastic member arranged in the shell; the two ends of the third elastic member are elastically applied to the support frame and the contact support respectively, and are used for applying a torsion force close to the stationary contact to the movable contact.

8. The ground fault circuit interrupter of claim 6, wherein, The lock catch assembly comprises: A jump catch rotationally arranged in the support frame; the other end of the connecting rod is rotationally arranged in the jump catch; A lock catch rotationally arranged in the support frame; the lock catch has a locking part, one end of the locking part is located on the rotation track of the jump catch; the linkage shaft is arranged in the lock catch in a following manner.

9. The ground fault circuit interrupter of claim 8, wherein, The first driving structure further comprises: A rotation shaft arranged in the shell; the rotation axis of the rotation shaft is collinear with the rotation axis of the support frame; A fourth elastic member, the two ends of the fourth elastic member are elastically applied to the rotation shaft and the lock catch respectively, and are used for applying an action force close to the jump catch to the locking part.

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