Current leakage start-stop protection module and circuit breaker

Abstract

A current leakage start-stop protection module and a circuit breaker. The current leakage start-stop protection module comprises a module housing and a drive shaft slidably mounted on the module housing. An operation hole is formed in the module housing. The drive shaft is operated through the operation hole. Static conductive members and movable conductive members are provided in the module housing; when the drive shaft is pressed to move in an axial direction, the movable conductive members connected to the drive shaft move from a first position to a second position; the movable conductive members are in contact with the static conductive members at the first position, and are separated from the static conductive members at a second position; the drive shaft is rotated to drive the movable conductive members to rotate between the second position and a third position; the drive shaft is unlocked from the module housing at the second position, and is locked to the module housing at the third position; and the movable conductive members are offset from the static conductive members. In the present invention, the drive shaft is rotated to drive the movable conductive members to switch between the second position and the third position, so that the distance between the movable conductive members and the static conductive members is increased without increasing the overall axial length of the module, thereby improving the use safety.

Description

Leakage start-stop protection module and circuit breaker

[0001] The present application claims priority to Chinese Patent Application No. 202410856325.3, filed on June 28, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of low-voltage electrical apparatus, in particular to a leakage start-stop protection module and circuit breaker. BACKGROUND

[0003] The leakage start-stop protection module is commonly used in a residual current circuit breaker. The leakage start-stop protection module can be tested for insulation performance without disassembling the product and without burning. However, the existing leakage start-stop protection module is usually of a press type structure. Due to the small size of the module, the creepage distance and the small electrical gap, the leakage start-stop protection module is prone to breakdown discharge, resulting in failure of the leakage start-stop protection module. SUMMARY

[0004] The present application aims to overcome at least one of the defects of the prior art and provide a leakage start-stop protection module and circuit breaker.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The present application provides a leakage start-stop protection module, comprising a module housing and a drive shaft slidingly assembled in the module housing. The module housing is provided with an operation hole through which the drive shaft is operated. The module housing is provided with a static conductive part and a dynamic conductive part. When the drive shaft is pressed to move in the axial direction, the dynamic conductive part connected to the drive shaft moves from a first position to a second position. The dynamic conductive part is in contact with the static conductive part at the first position and is separated from the static conductive part at the second position. The drive shaft is unlocked from the module housing at the second position and is locked with the module housing at a third position. The dynamic conductive part and the static conductive part are misaligned at the third position.

[0007] Preferably, the static conductive part comprises at least one pair of contact sheets, each pair of the contact sheets being arranged on opposite sides of the drive shaft. The dynamic conductive part comprises at least one conductive spring sheet. The middle part of the conductive spring sheet is connected to the drive shaft. At the first position, the two ends of the conductive spring sheet are in contact with a pair of contact sheets, respectively. At the second position, the two ends of the conductive spring sheet are spaced apart from a pair of contact sheets, respectively. At the third position, the two ends of the conductive spring sheet are misaligned with a pair of contact sheets, respectively.

[0008] Preferably, a locking structure is arranged in the module housing, one end of the driving shaft extends out of the module housing from the operation hole for operating the driving shaft, the other end of the driving shaft moves in the module housing, the locking structure is unlocked in the second position, and the locking structure is locked in the third position.

[0009] Preferably, the locking structure is arranged between the driving shaft and the interior of the module housing, and / or the locking structure is arranged between the conductive spring and the module housing.

[0010] Preferably, the interior of the module housing is provided with a protruding matching part, in the second position, the conductive spring is located on the side of the matching part facing away from the operation hole, and rotating the driving shaft makes the conductive spring stop or separate from the side of the matching part facing away from the operation hole for locking or unlocking the driving shaft.

[0011] Preferably, the matching part is arranged in the interior of the module housing in a ring shape, and in the first position, the conductive spring is located on the side of the matching part facing the operation hole.

[0012] Preferably, the interior of the module housing is provided with a protruding matching part, and the driving shaft is provided with a protruding locking part, rotating the driving shaft makes the locking part stop or separate from the side of the matching part facing away from the operation hole for locking or unlocking the driving shaft.

[0013] Preferably, the middle part of the driving shaft is provided with a boss, the middle part of the boss is provided with a mounting groove, the boss is divided into a locking part and a mounting part by the mounting groove, the movable conductive part is assembled in the mounting groove and the middle part of the movable conductive part is connected with the mounting part, and the two ends of the movable conductive part respectively extend from the opposite sides of the mounting groove.

[0014] Preferably, the locking part includes a locking boss, the axial length of the locking boss is equal to the moving stroke of the driving shaft, and when the driving shaft is rotated to the third position, the locking boss is stopped and locked with the matching part.

[0015] Preferably, the matching part is provided with a guide groove, and the driving shaft is slidingly matched with the guide groove by pressing the driving shaft.

[0016] Preferably, the driving shaft is provided with at least one positioning part, the module housing is provided with at least one limiting part, and the positioning part and the limiting part are matched for limiting the axial moving stroke of pressing the driving shaft.

[0017] Preferably, an elastic member is arranged between the driving shaft and the module housing, the elastic member is elastically deformed after the driving shaft is pressed, and the elastic member provides a restoring force for the driving shaft to move to the first position.

[0018] Preferably, one end of the driving shaft serves as an operating part, the operating part slidingly extends out of the operation hole, and the operating part is used for pressing and rotating the driving shaft.

[0019] Preferably, at least part of the operation part protrudes along the radial direction of the driving shaft to form a limiting platform, and an elastic member is sleeved on the driving shaft between the limiting platform and the operation hole, and two ends of the elastic member are connected with the limiting platform and the module shell respectively.

[0020] Preferably, the rotation angle of the driving shaft ranges from 30° to 150°.

[0021] Preferably, the rotation angle of the driving shaft is 90°.

[0022] Preferably, the conductive elastic sheet comprises a connecting plate, the connecting plate is arranged along the axial direction perpendicular to the driving shaft as a whole, at least part of the middle part of the connecting plate is connected with the mounting part arranged on the driving shaft, and two ends of the connecting plate extend to the opposite sides of the mounting part to form elastic arms, and each elastic arm is provided with a dynamic contact part matched with the static conductive part.

[0023] Preferably, the connecting plate is fixedly attached to one side surface of the mounting part, the two ends of the connecting plate extend beyond the mounting part to form elastic arms, one dynamic contact part is formed at the end of each elastic arm, and the two dynamic contact parts are located on the same plane parallel to the connecting plate.

[0024] Preferably, the connecting plate is a straight strip-shaped plate, the connecting plate is arranged along the radial direction of the mounting part, the two ends of the connecting plate are bent to form elastic arms on the same side of the mounting part along the axial direction of the driving shaft, the ends of the elastic arms extend outward along the radial direction of the driving shaft to form two dynamic contact parts, and the dynamic contact parts are coplanar with the mounting part on the side facing the static conductive part.

[0025] Preferably, the middle part of the connecting plate is bent to form a connecting part, the connecting part is arranged in the mounting groove of the mounting part, the two ends of the connecting part extend obliquely out of the mounting groove to form elastic arms, the ends of the elastic arms are bent to form contact parts, and the contact surfaces of the two contact parts are located on the same plane.

[0026] Preferably, at least one pair of assembly parts are arranged in the module shell, each pair of locking assembly parts is symmetrically distributed on the opposite sides of the driving shaft, each assembly part is used for arranging one contact sheet of the static conductive part, and each assembly part is provided with a wiring groove corresponding to the wiring part of the contact sheet.

[0027] Preferably, the module shell comprises at least two shells assembled with each other, the joint of the two shells is provided with buckles and clamping grooves clamped with each other, and / or the joint of the two shells is provided with recesses and positioning ribs inserted with each other.

[0028] The application also provides a circuit breaker comprising a shell, a leakage protection module arranged in the shell, and a leakage start-stop protection module as described above fixedly arranged in the shell.

[0029] The electric leakage start-stop protection module and the circuit breaker of the present application, on the basis of the press driving shaft moving from the first position to the second position, switch the moving conductor between the second position and the third position by rotating the driving shaft, without increasing the overall axial length of the module, fully utilizing the internal space, further increasing the distance between the moving conductor and the static conductor, avoiding the risk of breakdown, and improving the safety in use.

[0030] In addition, in the third position, the driving shaft cooperates with the module shell, or the moving conductor cooperates with the module shell, which can lock the driving shaft, has the advantages of simple structure, small space occupation, and convenient operation.

[0031] In particular, the moving conductor moves between the first position and the second position, respectively corresponding to the side of the second cooperation part facing the operation hole and the side of the second cooperation part facing away from the operation hole, and the second cooperation part can increase the creepage distance, so that the second cooperation part can isolate the moving contact part and the static conductor.

[0032] In addition, the cooperation part is also provided with a guide groove, which cooperates with the locking part to limit the movement trajectory of the driving shaft, which is beneficial to ensure the cooperation stability of the locking part and the cooperation part.

[0033] In addition, the operation part is formed integrally with the driving shaft, which is simple in structure, convenient in transmission, and beneficial to reduce the cost.

[0034] In addition, by configuring the elastic element, pressing the elastic element can store energy for the driving shaft to provide a reset force, and at the same time, the elastic element can also provide contact pressure when the moving conductor and the static conductor are in contact, which ensures the contact stability.

[0035] In addition, when the electric leakage start-stop module is arranged in the circuit breaker, the module shell can be omitted, and the shell of the circuit breaker is formed, which is beneficial to further reduce the cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the cooperation between the electric leakage start-stop protection module and the base in one embodiment of the present application;

[0037] Figure 2 is a schematic diagram of the cooperation between the electric leakage start-stop protection module and the base in one embodiment of the present application;

[0038] Figure 3 is a schematic diagram of the structure of the electric leakage start-stop protection module in one embodiment of the present application;

[0039] Figure 4 is a schematic diagram of the structure of the electric leakage start-stop protection module in one embodiment of the present application;

[0040] Figure 5 is a schematic diagram of the structure of the electric leakage start-stop protection module in one embodiment of the present application;

[0041] Fig. 6 is an exploded view of the module housing in one embodiment of the present application;

[0042] Fig. 7 is a schematic view of the structure of the electric leakage start-stop protection module in the first embodiment of the present application in the third position;

[0043] Fig. 8 is a schematic view of the structure of the electric leakage start-stop protection module in the first embodiment of the present application in the third position;

[0044] Fig. 9 is a schematic view of the structure of the electric leakage start-stop protection module in the first embodiment of the present application in the third position;

[0045] Fig. 10 is a schematic view of the structure of the electric leakage start-stop protection module in the second embodiment of the present application in the first position;

[0046] Fig. 11 is a schematic view of the cooperation between the second housing and the static conductive member in the second embodiment of the present application;

[0047] Fig. 12 is a schematic view of the cooperation between the first housing and the static conductive member in the second embodiment of the present application;

[0048] Fig. 13 is a schematic view of the cooperation between the driving shaft, the reset member and the dynamic conductive member in the second embodiment of the present application;

[0049] Fig. 14 is a schematic view of the cooperation between the driving shaft, the reset member and the dynamic conductive member in the second embodiment of the present application;

[0050] Fig. 15 is a schematic view of the structure of the dynamic conductive member in the second embodiment of the present application;

[0051] Fig. 16 is a schematic view of the structure of the contact sheet in the second embodiment of the present application;

[0052] Reference signs:

[0053] A - electric leakage start-stop protection module, 1 - module housing, 101 - operation hole, 102 - cooperation part, 1021 - first cooperation part, 1022 - second cooperation part, 103 - accommodation cavity, 104 - wiring slot, 105 - fixing part, 106 - limiting part, 107 - guide slot, 108 - positioning rib, 109 - positioning hook, 11 - first housing, 111 - buckle, 12 - second housing, 121 - clamping groove, 2 - driving shaft, 21 - operation part, 22 - limiting platform, 23 - mounting part, 231 - mounting slot, 24 - positioning part, 25 - locking boss, 26 - locking part, 3 - dynamic conductive member, 31 - connecting part, 32 - elastic arm, 33 - dynamic contact part, 4 - static conductive member, 40 - contact sheet, 41 - wiring part, 42 - static contact part, 5 - elastic member, B - base. DETAILED DESCRIPTION

[0054] The embodiments of the leakage start-stop protection module and the circuit breaker of the present application are further illustrated in the following description with reference to the accompanying drawings. The leakage start-stop protection module and the circuit breaker of the present application are not limited to the description of the following embodiments.

[0055] The circuit breaker comprises a housing, at least one contact unit is arranged in the housing, the main line of each contact unit is connected with an external line, and the contact unit is controlled to control the on-off of the external line; a leakage protection module is further arranged in the housing, the leakage protection module is connected with the main line of the contact unit, and is used to detect the leakage state of the circuit breaker; the leakage start-stop protection module A is further arranged in the leakage protection module, and is connected between the leakage protection module and the main line, and is used to connect or disconnect the connection between the leakage protection module and the main line.

[0056] Generally, the leakage start-stop protection module A comprises a module housing 1, the module housing 1 is provided with an operation hole 101, a driving shaft 2, a static conductive part 4 and a dynamic conductive part 3 are arranged in the module housing 1, wherein the driving shaft 2 passes through the operation hole 101, the driving shaft 2 is in sliding fit with the module housing 1, the driving shaft 2 can move linearly along the axial direction of the driving shaft 2, the dynamic conductive part 3 connected with the driving shaft 2 is moved from a first position to a second position by pressing the driving shaft 2, when the dynamic conductive part 3 is located at the first position (see FIG. 8), the dynamic conductive part 3 is in contact with the static conductive part 4, and the leakage protection module is connected; when the dynamic conductive part 3 is located at the second position, the dynamic conductive part 3 is separated from the static conductive part 4, and the leakage protection module is disconnected.

[0057] The improvement of the present application is that the driving shaft 2 is rotated to drive the dynamic conductive part 3 to rotate between the second position and the third position, the driving shaft 2 is unlocked with the module housing 1 at the second position, and is locked with the module housing 1 at the third position and the dynamic conductive part 3 is misaligned with the static conductive part 4 (see FIGS. 7 and 8), so that, on the basis of pressing the driving shaft 2 to move from the first position to the second position, the dynamic conductive part 3 is switched between the second position and the third position by rotating the driving shaft 2, the internal space is fully utilized without increasing the axial length of the module as a whole, the distance between the dynamic conductive part 3 and the static conductive part 4 is further increased, the risk of breakdown is avoided, and the safety in use is improved.

[0058] Specifically, as shown in FIGS. 7-11, the static conductor 4 includes at least one pair of contact pieces 40, each pair of contact pieces 40 corresponding to one contact unit of the circuit breaker, when the static conductor 4 includes two or more pairs of contact pieces 40, the adjacent two pairs of contact pieces 40 are arranged in the axial direction of the drive shaft 2, and each pair of contact pieces 40 is arranged on the opposite side of the drive shaft 2, and the dynamic conductor 3 includes at least two conductive springs, the middle part of each conductive spring is connected to the drive shaft 2, in the first position, the two ends of each conductive spring are in contact with a pair of contact pieces 40 respectively, thereby connecting the leakage start-stop protection module A, in the second position, the two ends of each conductive spring are spaced apart from a pair of contact pieces 40 respectively, thereby disconnecting the leakage start-stop protection module A, and in the third position, the two ends of each conductive spring are misaligned with a pair of contact pieces 40 respectively, thereby further increasing the distance between each conductive spring and the contact pieces 40, and preferably, the rotation angle range of the drive shaft 2 is 30°-150°.

[0059] The leakage start-stop protection module further includes a locking structure, the locking structure is located in the interior of the module housing 1, the locking structure is located between the interior of the module housing 1 and the drive shaft 2, or the locking structure can also be arranged between the conductive spring and the module housing 1, one end of the drive shaft 2 extends out of the module housing 1 through the operation hole 101 for operating the drive shaft 2, the end of the drive shaft 2 located outside the module housing 1 can be provided with an operation part 21, the other end of the drive shaft 2 moves in the interior of the module housing 1, in the second position, the locking structure is in an unlocked state, the drive shaft 2 can move in the axial direction, in the third position, the locking structure is in a locked state, thereby limiting the movement of the drive shaft 2 in the axial direction, that is, when the drive shaft 2 rotates from the second position to the third position, the locking structure enters the locked state, thereby locking the drive shaft 2, and when the drive shaft 2 rotates from the third position to the second position, the locking structure is unlocked, so that the drive shaft 2 can be moved to the first position.

[0060] The locking structure generally includes a pair of bosses that stop each other, or a groove and a protrusion that cooperate with each other, for example, as shown in FIGS. 7-9, 11 and 12, a protruding cooperation part 102 is arranged in the interior of the module housing 1, the drive shaft 2 is rotated, the conductive spring is stopped or separated from the side of the cooperation part 102 away from the operation hole 101 for locking or unlocking the drive shaft 2, or a locking part 26 is arranged on the drive shaft 2, the drive shaft 2 is rotated, the locking part 26 is stopped or separated from the side of the cooperation part 102 away from the operation hole 101 for locking or unlocking the drive shaft 2. It should be noted that the locking in the third position means that the drive shaft 2 cannot move in the axial direction. In addition, as shown in FIGS. 1-8 and 10, one end of the drive shaft 2 serves as the operation part 21, the operation part 21 extends out of the operation hole 101 of the module housing 1 for pressing and rotating the drive shaft 2, the operation part 21 is formed integrally with the drive shaft 2, which has the advantages of simple structure, convenient transmission, and can also save production and assembly costs.

[0061] In addition, the locking structure can further include at least one anti-extraction portion, which is located at the portion of the drive shaft 2 inside the module housing 1, protrudes from the drive shaft 2 in the axial direction of the drive shaft 2, and has a protruding height greater than the sum of the diameter of the drive shaft 2 and the inner diameter of the operation hole 101, so that the anti-extraction portion is clamped from the inside of the module housing 2 to the edge of the operation hole 101, thereby limiting the drive shaft 2 from falling off the operation hole 101; of course, the anti-extraction can also be achieved by changing the outer diameter of the drive shaft 2, for example, the drive shaft 2 is an axle body with gradually changing diameter, and the outer diameter of a portion of the axle body is greater than the inner diameter of the operation hole 101, which can also achieve anti-extraction.

[0062] Further, as shown in FIGS. 1-8, 10, 13 and 14, the drive shaft 2 and the module housing 1 are further provided with an elastic member 5, both ends of the elastic member 5 are connected with the drive shaft 2 and the module housing 1 respectively, the elastic member 5 is elastically deformed after the drive shaft 2 is pressed, and provides a reset force for the drive shaft 2 to move to the first position, and at the same time, when the movable conductive member 3 and the static conductive member 4 are in contact, the drive shaft 2 can be limited to pop out, and the elastic member 5 can provide contact pressure for the movable conductive member 3 and the static conductive member 4 at this time, thereby ensuring the contact stability. In addition, the drive shaft 2 is provided with at least one positioning portion 24, and the module housing 1 is provided with at least one limiting portion 106, and the positioning portion 24 and the limiting portion 106 cooperate to limit the axial movement stroke of the drive shaft 2.

[0063] The first embodiment of the leakage start-stop protection module A is provided in combination with FIGS. 1-9.

[0064] As shown in FIGS. 7-9, the leakage start-stop protection module A includes a module housing 1, an accommodation cavity 103 is formed inside the module housing 1, the module housing 1 is provided with an operation hole 101 communicating with the inside at one end, and the other end of the module housing 1 away from the operation hole 101 is provided with a fixing portion 105 for fixing the module housing 1 inside the circuit breaker, and in FIG. 9, the fixing portion 105 is two legs provided outside the module housing 1, and each leg is fixedly connected with the shell of the circuit breaker inside through a screw.

[0065] The driving shaft 2 is in sliding fit with the module shell 1, one end of the driving shaft 2 is provided with an operation part 21, and the operation part 21 is in sliding extension from the operation hole 101 to the outside of the module shell 1; the static conductive part 4 comprises at least one pair of contact sheets 40, two pairs of contact sheets 40 are taken as an example in the embodiment, but the number of the contact sheets 40 is not limited to two pairs, and can be one pair or more than three pairs, the two pairs of contact sheets 40 are oppositely arranged on the module shell 1 along the axial direction of the driving shaft 2, and each pair of contact sheets 40 is symmetrically distributed on the opposite sides of the driving shaft 2, one end of each contact sheet 40 is provided with a static contact part 42, and the other end is provided with a wiring part 41, the wiring part 41 is used for wiring in cooperation with the wiring groove 104 provided on the module shell 1, and the dynamic conductive part 3 comprises two conductive springs, the two conductive springs are oppositely arranged at the middle part of the driving shaft 2, and each conductive spring is matched with one pair of contact sheets 40, that is, two ends of each conductive spring are provided with dynamic contact parts 33.

[0066] When the dynamic conductive part 3 is located at the first position, the dynamic contact parts 33 of the conductive springs are in contact with the static contact parts 42 of the contact sheets 40 respectively, the driving shaft 2 is moved along the axial direction by pressing the operation part 21, so that the dynamic conductive part 3 is moved from the first position to the second position, at this time, the dynamic conductive part 3 is located at the second position, the dynamic contact parts 33 of the conductive springs are oppositely arranged in the axial direction parallel to the driving shaft 2, the driving shaft 2 is rotated by rotating the operation part 21, so that the dynamic conductive part 3 can be rotated between the second position and the third position, as shown in FIGS. 7 and 8, when the dynamic conductive part 3 is located at the third position, the driving shaft 2 is locked with the module shell 1 and the dynamic conductive part 3 is oppositely arranged with the static conductive part 4, when the dynamic conductive part 3 is rotated to the second position, the driving shaft 2 is unlocked with the module shell 1, at this time, the dynamic conductive part 3 is oppositely arranged with the static conductive part 4 along the axial direction parallel to the driving shaft 2.

[0067] In the embodiment, the driving shaft 2 is rotated between the second position and the third position, the rotation angle range of the driving shaft 2 is between 30° and 150°, preferably, the rotation angle of the driving shaft 2 is 90°, at this time, the distance between the dynamic conductive part 3 and the static conductive part 4 is maximum.

[0068] In the embodiment, the elastic member 5 is arranged between the driving shaft 2 and the module housing 1, and the pressing operation part 21 causes the elastic member 5 to elastically deform, and the elastic member 5 provides the driving shaft 2 with a reset force to move to the first position. Preferably, the elastic member 5 is arranged outside the module housing 1, so as to avoid occupying too much space inside the module housing 1 and affecting the movement of other internal structures. In FIGS. 1-8, the elastic member 5 is a spring, which is sleeved outside the driving shaft 2. The operation part 21 has at least a part of the region protruding along the radial direction of the driving shaft 2 to form a limiting table 22. The elastic member 5 is sleeved outside the driving shaft 2 between the limiting table 22 and the operation hole 101. One end of the elastic member 5 is connected with the limiting table 22, and the other end is connected with the module housing 1, that is, the other end can be connected with the outside of the module housing 1 provided with the operation hole 101, or can be connected with the hole wall of the operation hole 101, or can be connected with the inside of the module housing 1 through the operation hole 101.

[0069] In the embodiment, the locking structure is arranged between the module housing 1 and the driving shaft 2 and the movable conducting member 3, that is, when the driving shaft 2 is rotated from the second position to the third position, the driving shaft 2 is locked with the module housing 1, and at the same time, the movable conducting member 3 is also locked with the module housing 1, so as to lock the driving shaft 2 at the third position, and keep the movable conducting member 3 and the static conducting member 4 in a state of a large distance, and the driving shaft 2 cannot move along the axial direction. When the driving shaft 2 is rotated from the third position to the second position, the locking part 26 is unlocked with the module housing 1, and at the same time, the movable conducting member 3 is also unlocked with the module housing 1, so that the driving shaft 2 can move along the axial direction to the first position.

[0070] It should be noted that in the embodiment, the locking structure can also be arranged only between the driving shaft 2 and the module housing 1, or when the hardness of the movable conducting member 3 is large, the movable conducting member 3 can also be locked with the module housing 1.

[0071] The module housing 1 is internally provided with a protruding matching part 102, and the driving shaft 2 is provided with a locking part 26 which protrudes outward along the radial direction of the driving shaft 26. Preferably, the locking part 26 and the movable conducting member 3 are arranged in parallel along the axis of the driving shaft 2. Of course, the locking part 26 and the movable conducting member 3 can also be slightly offset along the axial direction.

[0072] As shown in FIGS. 7-9, the fitting part 102 includes a first fitting part 1021 and a second fitting part 1022, wherein the first fitting part 1021 is located near the operating hole 101, and the second fitting part 1022 is located in the middle of the module shell 1, that is, the second fitting part 1022 is located below the first fitting part 1021 in the axial direction, and the second fitting part 1022 is provided with a guide groove 107 that is in sliding fit with the driving shaft 2, and when the driving shaft 2 moves in the axial direction, the driving shaft 2 is in sliding fit with the guide groove 107; in the first position, the locking part 26 on the driving shaft 2 is not in fit with the first fitting part 1021, and the conductive spring sheet is located on the side of the second fitting part 1022 facing the operating hole 101, in the second position, the locking part 26 is still not in fit with the first fitting part 1021, and the conductive spring sheet is located on the side of the second fitting part 1022 away from the operating hole 101, rotating the driving shaft 2 to the third position makes the locking part 26 stop against the first fitting part 1021, and the conductive spring sheet stops against the second fitting part 1022, thereby locking the driving shaft 2 to the third position, and after the driving shaft 2 is rotated from the third position to the second position, the locking part 26 is separated from the first fitting part 1021, the conductive spring sheet is separated from the second fitting part 1022, and the driving shaft 2 is unlocked, thereby enabling the driving shaft 2 in the second position to be driven to the first position.

[0073] A structure of the module shell 1 applied in the embodiment is provided in combination with FIGS. 1-7, as shown in FIGS. 3-7, the module shell 1 includes at least two shells that are assembled with each other, and the joint of the two shells is provided with buckles 111 and slots 121 that are in clamping fit with each other, and / or the joint of the two shells is provided with recesses and positioning ribs 109 that are in insertion fit with each other, thereby being assembled to form a complete module shell 1.

[0074] Specifically, the edge of one shell is provided with the slots 121 and / or the buckles 111, and the edge of the other shell is provided with the buckles 111 and / or the slots 121 in fit, and each slot 121 is in clamping fit with one buckle 111, thereby assembling the two shells together. In addition, the edges of the two shells that are assembled with each other can also be provided with the recesses and the positioning ribs 108 that are in insertion fit with each other, and preferably the recesses are open slots that can play a guiding role and further make the assembly of the two shells more firm.

[0075] In the embodiment, the module shell 1 is assembled by two shells, for the convenience of description, the module shell 1 is assembled by a first shell 11 and a second shell 12, and a containing cavity 103 is formed between the first shell 11 and the second shell 12, and the module shell 1 is provided with an operating hole 101 that is open at one end and communicates with the inside, and the operating hole 101 is formed by the butt joint of the semicircular recesses at one end of the first shell 11 and the second shell 12, and the end of the first shell 11 away from the operating hole 101 is provided with two legs, and each leg is configured with a screw for connecting with the circuit breaker.

[0076] As shown in FIG. 5 and FIG. 6, the first shell 11 is provided with a plurality of buckles 111 on the outer side of the side wall near the edge, and the second shell 12 is provided with a plurality of clamping grooves 121 on the edge, the number of the buckles 111 and the clamping grooves 121 can be set according to actual needs, and the buckles 111 and the clamping grooves 121 are preferably arranged in pairs, and each pair of buckles 111 (clamping grooves 121) is symmetrically arranged on the opposite sides of the first shell 11 (the second shell 12); the edge of the first shell 11 is provided with two grooves, the openings of the grooves face the second shell 12, and the edge of the second shell 12 is provided with a positioning rib 108 extending outward, the positioning rib 108 and the grooves are inserted with each other when the first shell 11 and the second shell 12 are assembled, and in the embodiment, the protruding length of the positioning rib 108 is less than the groove depth of the grooves, so that there is still a certain gap at the groove bottom when the first shell 11 and the second shell 12 are assembled, and the gap can correspond to the wiring portion 41 as a wiring groove 104.

[0077] In addition, the module shell 1 is also provided with a positioning hook 109 on the outside, when the leakage start-stop protection device is arranged in the circuit breaker, the positioning hook 109 can be connected with the groove arranged in the circuit breaker, so as to limit the whole in the circuit breaker.

[0078] The inside of the module shell 1 is provided with two pairs of assembly portions, one pair of assembly portions is arranged on both sides of the operation hole 101, and the other pair of assembly portions is arranged in the middle of the side wall of the module shell 1, each pair of assembly portions is symmetrically distributed on the opposite sides of the drive shaft 2, and the connecting line between the two assembly portions on the same side of the drive shaft 2 is parallel to the axial direction of the drive shaft 2, each assembly portion is provided with a wiring groove 104 connected to the outside of the module shell 1, and each assembly portion is provided with a contact piece 40.

[0079] The first matching part 1021 and the second matching part 1022 are arranged inside the module shell 1, the number of the first matching part 1021 matches the number of the locking part 26, and the number of the second matching part 1022 can be matched with the conductive elastic sheet, in the embodiment, one pair of first matching parts 1021 and two pairs of second matching parts 1022 are taken as an example, but it is not limited to one pair of first matching parts 1021 and two pairs of second matching parts 1022, that is, the first matching part 1021 and the second matching part 1022 can be one pair, two pairs or more than three pairs, when one pair of first matching parts 1021 is arranged in the module shell 1, two first matching parts 1021 are arranged on the module shell 1 close to the operation hole 101 and symmetrically distributed on the opposite sides of the driving shaft 2, when two pairs of second matching parts 1022 are arranged in the module shell 1, the two pairs of second matching parts 1022 are spaced apart in the axial direction of the driving shaft 2, each pair of second matching parts 1022 is symmetrically distributed on the opposite sides of the driving shaft 2, and each second matching part 1022 is located on the inner side wall of the module shell 1 between a pair of assembly parts, and a guide groove 107 is arranged on the side of each second matching part 1022 facing the driving shaft 2, after the first shell 11 and the second shell 12 are spliced, the first matching part 1021 and the second matching part 1022 located on the same first shell 11 (or the second shell 12) are arranged along the same axis, when the volume of the second matching part 1022 is large, a sufficient moving gap needs to be left at the joint of each pair of second matching parts 1022, that is, the width of the moving gap is greater than or equal to the width of the movable conductive part 3, and the two ends of the moving gap correspond to a pair of assembly parts respectively, so that the movable conductive part 3 can pass through the second matching part 1022 through the moving gap when moving between the first position and the second position, and in this process, the driving shaft 2 and the guide groove 107 are in sliding fit; the driving shaft 2 is rotated by 90°, so that the locking part 26 and the movable conductive part 3 are transferred from the second position to the third position, at this time, the locking part 26 abuts against the side of the first matching part 1021 away from the operation hole 101, and the movable conductive part 3 abuts against the side of the second matching part 1022 away from the operation hole 101, so that the driving shaft 2 cannot move in the axial direction, and the driving shaft 2 is rotated by 90°, so that the locking part 26 and the movable conductive part 3 are transferred from the third position to the second position, at this time, the locking part 26 is separated from the side of the first matching part 1021 away from the operation hole 101, and the movable conductive part 3 is separated from the side of the second matching part 1022 away from the operation hole 101 and enters the moving gap, under the driving of the elastic part 5, the movable conductive part 3 moves to the first position in the axial direction.

[0080] Of course, on the basis of leaving the moving gap, the second matching part 1022 can also have a certain axial length, so that the movable conductive part 3 is located in the middle position of the second matching part 1022 at the first position.

[0081] Further, the inner side wall of the module shell 1 away from the operation hole 101 is provided with a limiting portion 106, and one end of the drive shaft 2 away from the operation portion 21 is provided with a positioning portion 24. When the positioning portion 24 abuts against the limiting portion 106, the axial movement stroke of the drive shaft 2 when being pressed can be limited. The operation hole 101 and the drive shaft 2 can also be provided with other positioning structures to limit the axial movement stroke of the drive shaft 2.

[0082] It should be noted that in the present embodiment, the assembly direction and shape of the first shell 11 and the second shell 12 forming the module shell 1 are not specifically limited, and can be left-right assembly, top-bottom assembly, etc., as long as the shell structure with the accommodating cavity 103 can be achieved.

[0083] A structure of the drive shaft 2 applied in the present embodiment is provided in combination with FIGS. 7 and 8.

[0084] As shown in FIG. 7 and FIG. 8, the driving shaft 2 is a circular shaft body as a whole, one end of the driving shaft 2 is the operation part 21, in the figure, the operation part 21 is radially protruded from the one end of the driving shaft 2, the outer diameter of the operation part 21 is larger than the inner diameter of the operation hole 101, the side of the operation part 21 facing the operation hole 101 can be the limiting table 22, the elastic member 5 is sleeved on the outside of the driving shaft 2 between the limiting table 22 and the module shell 1, the elastic member 5 is a spring, pressing the operation part 21, the elastic member 5 is compressed under the cooperation of the limiting table 22 and the module shell 1, so as to provide driving force for the driving shaft 2 to move to the first position; the one end of the driving shaft 2 away from the operation part 21 is provided with the protrusion as the positioning part 24, when the positioning part 24 abuts against the limiting part 106 in the module shell 1, the movement stroke of pressing the driving shaft 2 is limited, the driving shaft 2 can be pressed to the second position; the driving shaft 2 is provided with two mounting parts 23, each mounting part 23 is a disc as a whole, the outer diameter of each mounting part 23 is less than or equal to the inner diameter of the guide groove 107, and is greater than the inner diameter of the operation hole 101, the two mounting parts 23 are arranged in the axial direction of the driving shaft 2, one of the mounting parts 23 is located in the middle of the driving shaft 2, and the other mounting part 23 is arranged at a position closer to the positioning part 24 of the driving shaft 2, when the driving shaft 2 moves in the axial direction, the circumferential side surface of the mounting part 23 is in sliding cooperation with the guide groove 107 in the axial direction, when the driving shaft 2 is rotated, the circumferential side surface of the mounting part 23 is in rolling cooperation with the guide groove 107, in the third position, each mounting part 23 cooperates with a second cooperation part 1022, the second cooperation part 1022 can increase the creepage distance, and can also isolate the moving contact part 33 and the static contact part 42; the driving shaft 2 is further provided with the locking part 26, preferably, the locking parts 26 are symmetrically distributed on opposite sides of the driving shaft 2, each locking part 26 is arranged in the same axial line of the moving contact part 33 of one of the moving conductive members 3 and is spaced apart from the moving contact part 33, in FIG. 7, the locking part 26 is a strip-shaped protrusion, the locking part 26 is located between the operation part 21 and the adjacent mounting part 23, and the locking part 26 is located in the module shell 1.

[0085] In addition, the locking part 26 of the present embodiment can also have the function of preventing falling off, that is, the sum of the protruding height of the locking part 26 and the diameter of the driving shaft 2 is greater than the inner diameter of the operation hole 101, so that the locking part 26 can be clamped from the inside of the module shell 1 and the edge of the operation hole 101, thereby preventing the driving shaft 2 from falling off the module shell 1. Of course, the anti-falling part can also be arranged additionally.

[0086] In the present embodiment, the conductive elastic sheet includes a connecting plate, the connecting plate is arranged along the direction perpendicular to the axial direction of the driving shaft 2 as a whole, at least part of the middle part of the connecting plate is connected with the mounting part 23 arranged on the driving shaft 2, the two ends of the connecting plate respectively extend to the opposite sides of the mounting part 23 to form the elastic arm 32, and each elastic arm 32 is provided with the moving contact part 33 cooperating with the static conductive member 4.

[0087] As shown in Figures 8 and 9, the conductive spring includes a strip-shaped connecting plate, which is attached and fixed to one side surface of the mounting part 23. In Figure 8, the connecting plate is fixed to the side surface of the mounting part 23 facing away from the operating hole 101. The two ends of the connecting plate extend beyond the mounting part 23 and bend to form elastic arms 32. The length of the elastic arms 32 can be adjusted according to specific circumstances. A moving contact part 33 is formed at the end of each elastic arm 32, and the two moving contact parts 33 are located on the same plane parallel to the connecting plate, which facilitates cooperation with the two contact pieces 40 in the static conductive component 4. In Figures 8 and 9, the two moving contact parts 33 are coplanar with the side of the mounting part 23 facing the operating hole 101. In Figures 8 and 9, the connecting plate is arranged radially along the mounting part 23. The two ends of the connecting plate are bent along the axial direction of the drive shaft 2 towards the same side of the mounting part 23 to form elastic arms 32. At this time, the connecting plate is a strip-shaped straight plate. The ends of the elastic arms 32 extend outward along the radial direction of the drive shaft 2 to form two moving contact parts 33. On the side facing the static conductive component 4, the moving contact part 33 is coplanar with the mounting part 23, so that the conductive spring piece is approximately inverted "V" shaped.

[0088] In this embodiment, as shown in FIG7, the contact piece 40 in the static conductive component 4 is an L-shaped plate structure. One end of the contact piece 40 serves as a static contact part 42 to cooperate with the moving contact part 33, and the other end of the contact piece 40 serves as a wiring part 41 to cooperate with the wiring groove 104 opened on the module housing 1. Correspondingly, the module housing 1 is provided with an assembly part for assembling the contact piece 40. The assembly parts are arranged in pairs and symmetrically distributed on opposite sides of the drive shaft 2. One pair of assembly parts is adjacent to the operation hole 101, and the operation hole 101 is located between the pair of assembly parts. The other pair of assembly parts is located in the middle of the side wall of the module housing 1. Each assembly part is provided with a wiring groove 104 and corresponds to the wiring part 41. The static contact part 42 is attached to one side of the assembly part to cooperate with the moving contact part 33.

[0089] A second embodiment of the leakage current start-stop protection module A is provided in conjunction with Figures 1-6 and 10-16.

[0090] As shown in FIGS. 1-6, 10-12, the leakage start-stop protection module A is similar to the first embodiment, and the leakage start-stop protection module A comprises a module housing 1, one end of the module housing 1 is provided with an operation hole 101, the other end is provided with a fixing part 105, the inside of the module housing 1 forms an accommodating cavity 103, a driving shaft 2, a static conductive part 4 and a dynamic conductive part 3 are arranged in the inside of the module housing 1, the driving shaft 2 is in sliding fit with the module housing 1, one end of the driving shaft 2 is provided with an operation part 21, and the operation part 21 extends from the operation hole 101 to the outside of the module housing 1 in sliding manner; the static conductive part 4 comprises two pairs of contact sheets 40, the two pairs of contact sheets 40 are arranged on the module housing 1 in opposite manner along the axial direction of the driving shaft 2, and each pair of contact sheets 40 is symmetrically distributed on the opposite sides of the driving shaft 2, one end of each contact sheet 40 is provided with a static contact part 42, and the other end is provided with a contact part, the wiring part 41 is used for wiring in pair with the wiring slot 104 arranged on the module housing 1, the dynamic conductive part 3 comprises at least two conductive springs, in the embodiment, the dynamic conductive part 3 comprises two conductive springs, but is not limited to only two conductive springs, and the specific number of the conductive springs is matched with the contact sheets 40 in the static conductive part 2, in the figure, the two conductive springs are arranged in the middle part of the driving shaft 2 in spaced manner, and each conductive spring is matched with a pair of contact sheets 40, that is, two ends of each conductive spring are provided with dynamic contact parts 33.

[0091] As shown in FIG. 10, when the dynamic conductive part 3 is located at the first position, the dynamic contact parts 33 of the conductive springs are in contact with the static contact parts 42 of the contact sheets 40, the operation part 21 is pressed to move the driving shaft 2 along the axial direction, so that the dynamic conductive part 3 is moved from the first position to the second position, at this time, the dynamic conductive part 3 is located at the second position, the dynamic contact parts 33 of the conductive springs are in opposite manner in the axial direction parallel to the driving shaft 2, the operation part 21 is rotated to rotate the driving shaft 2 around the shaft, so that the dynamic conductive part 3 can rotate between the second position and the third position, when the dynamic conductive part 3 is located at the third position, the driving shaft 2 is locked with the module housing 1 and the dynamic conductive part 3 is in dislocation with the static conductive part 4, when the dynamic conductive part 3 is rotated to the second position, the driving shaft 2 is unlocked with the module housing 1, at this time, the dynamic conductive part 3 is again in opposite manner along the axial direction parallel to the driving shaft 2.

[0092] In the embodiment, the elastic part 5 is arranged between the driving shaft 2 and the module housing 1, the driving shaft 2 is moved from the second position to the first position by the elastic part 5, and the assembly position and structure are referred to the first embodiment.

[0093] Different from the first embodiment, in the third position, only the driving shaft 2 and the module housing 1 are locked, that is, the middle part of the driving shaft 2 is provided with a locking part 26, when the rotating driving shaft 2 is turned from the second position to the third position, the locking part 26 cooperates with the module housing 1 to lock, thereby locking the driving shaft 2 in the third position, keeping the moving conductive part 3 and the static conductive part 4 in a state of a larger distance, at this time, the driving shaft 2 cannot move along the axial direction; when the rotating driving shaft 2 is turned from the third position to the second position, the driving shaft 2 and the module housing 1 are unlocked, so that the driving shaft 2 can move along the axial direction to the first position.

[0094] As shown in FIGS. 10-12, the module housing 1 is internally provided with a protruding cooperation part 102, preferably, the cooperation part 102 is provided with a guide groove 107 which is in sliding cooperation with the driving shaft 2, when the driving shaft 2 moves along the axial direction, the driving shaft 2 is in sliding cooperation with the guide groove 107; in the embodiment, the axial length of the cooperation part 102 is large, in order to reduce the weight of the module housing 1, the cooperation part 102 can adopt a hollow structure, when in the first position, the position of the locking part 26 corresponds to the middle part of the cooperation part 102, when in the second position, the locking part 26 is located on the side of the cooperation part 102 which is opposite to the operation hole 101, the rotating driving shaft 2 is turned to make the locking part 26 stop against the cooperation part 102 which is opposite to the operation hole 101, thereby locking the driving shaft 2 to the third position, or making the locking part 26 separate from the cooperation part 102 which is opposite to the operation hole 101, thereby unlocking the driving shaft 2, so that the driving shaft 2 which is turned to the second position can be reset to the first position.

[0095] In the embodiment, the rotating range of the driving shaft 2 is the same as the first embodiment, which is 90°, at this time, the locking part 26 corresponds to the two ends between each conductive spring piece.

[0096] In addition, the module housing 1 of the present embodiment can also be assembled, and the formation of the accommodating cavity 103, the operation hole 101, the fixing portion 105, the assembly portion, and the wiring slot 104 can refer to the first embodiment. Different from the first embodiment, two pairs of matching portions 102 are arranged on the inner side wall of the module housing 1. Similar to the first embodiment, the two pairs of matching portions 102 are examples, and the matching portion 102 can also be one pair or more than three pairs. When the matching portion 102 is more than two pairs, the adjacent two pairs of matching portions 102 are spaced relative to each other in the axial direction of the drive shaft 2. Each pair of matching portions 102 is symmetrically distributed on the opposite sides of the drive shaft 2. Each matching portion 102 is arranged on the inner side wall of the module housing 1 between a pair of assembly portions in the circumferential direction. A guide slot 107 is arranged on the side of each matching portion 102 facing the drive shaft 2. After the first housing 11 and the second housing 12 are spliced, the circumferential length of the matching portion 102 is large in the present embodiment. There is a sufficient movement gap at the joint of each pair of matching portions 102, that is, the width of the movement gap is greater than or equal to the width of the movable contact 3. The two ends of the movement gap correspond to a pair of assembly portions, respectively. Therefore, the movable contact 3 can pass through the matching portion 102 through the movement gap when moving between the first position and the second position. The drive shaft 2 is in sliding fit with the guide slot 107. The drive shaft 2 is rotated by 90°, so that the movable contact 3 is transferred from the second position to the third position. At this time, the locking portion 26 abuts against the side of the matching portion 102 away from the operation hole 101, thereby locking the drive shaft 2, so that the drive shaft 2 cannot move to the first position in the axial direction. Meanwhile, the matching portion 102 with a large circumferential length can isolate the movable contact 33 and the static contact 4. The drive shaft 2 is rotated by 90°, so that the movable contact 3 is transferred from the third position to the second position. At this time, the locking portion 26 is separated from the side of the matching portion 102 away from the operation hole 101, so that the movable contact 3 enters the movement gap. Under the driving of the elastic member 5, the movable contact 3 moves to the first position.

[0097] Further, the inner side wall of the module housing 1 away from the operation hole 101 serves as a limiting portion 106. In FIGS. 10-12, the limiting portion 106 is a protruding structure. The end of the drive shaft 2 away from the operation portion 21 is provided with a positioning portion 24. When the positioning portion 24 abuts against the limiting portion 106, the axial movement stroke of the drive shaft 2 when being pressed can be limited. Other positioning structures can also be arranged between the operation hole 101 and the drive shaft 2.

[0098] Similar to the first embodiment, the splicing direction and shape of the first housing 11 and the second housing 12 forming the module housing 1 are not limited, and can be left-right splicing, up-down splicing, etc. The housing structure with the accommodating cavity 103 can be realized.

[0099] The structure of the drive shaft 2 applied to the present embodiment is provided in combination with FIGS. 10, 13, and 14.

[0100] As shown in FIG. 10, 13 and 14, the driving shaft 2 is a circular shaft body as a whole, one end of the driving shaft 2 is the operation part 21, in the figure, the operation part 21 is radially protruded from the one end of the driving shaft 2, the outer diameter of the operation part 21 is larger than the inner diameter of the operation hole 101, the operation part 21 is further radially protruded from the one end close to the operation hole 101 to form the annular protrusion as the limiting platform 22, the elastic member 5 is sleeved on the outer side of the driving shaft 2 between the limiting platform 22 and the operation hole 101; the part of the driving shaft 2 extending into the module shell 1 is provided with two boss structures arranged in the axial direction, the middle part of each boss is provided with the recess as the mounting groove 231, the mounting groove 231 is an open groove with three open sides, the boss is divided into two parts by the mounting groove 231, the part away from the operation part 21 is the mounting part 23, when the movable contact 3 is arranged in the mounting groove 231, the middle part of the movable contact 3 is connected with the mounting part 23, the two ends of the movable contact 3 respectively extend from the opposite sides of the mounting groove 231, the part close to the operation part 21 is the locking part 26, the locking part 26 cooperates with the matching part 102 to lock or unlock the driving shaft 2.

[0101] Preferably, as shown in FIG. 10, 13 and 14, the locking part 26 includes the locking boss 25, the locking boss 25 is a strip-shaped protrusion as a whole, the axial length of the locking boss 25 is equal to the moving stroke of the driving shaft 2, when the driving shaft 2 is rotated to the third position, the locking boss 25 is stopped by the side of the matching part 102 facing away from the operation hole 101, thereby limiting the movement of the driving shaft 2 in the axial direction. In the embodiment, two locking bosses 25 are arranged on each locking part 26, the locking bosses 25 are respectively arranged on the opposite sides of the locking part 26, the locking boss 25 has a certain length in the axial direction, therefore, the locking boss 25 can also have a guiding effect, when the driving shaft 2 is linearly moved, the locking boss 25 can also be considered to have a guiding effect, the locking boss 25 is slidably matched with the guide groove 107 on the matching part 102, for realizing the guiding effect of the axial movement.

[0102] Of course, the driving shaft 2 is additionally provided with the guiding part slidably matched with the guide groove 107, or the side wall of the driving shaft 2 is directly slidably matched with the guide groove 107, which is also the same.

[0103] In addition, the one end of the driving shaft 2 away from the operation part 21 is provided with the positioning part 24, or the side of the mounting part 23 away from the operation part 21 and facing away from the operation hole 101 is the positioning part 24, for cooperating with the limiting part 106 in the module shell 1, thereby limiting the pressing stroke of the driving shaft 2.

[0104] In the embodiment, as shown in Figs. 13-15, the conductive elastic sheet of the movable conducting member 3 comprises a connecting plate, the connecting plate is arranged along the axial direction perpendicular to the driving shaft 2, at least part of the middle part of the connecting plate is connected with the mounting part 23 of the driving shaft 2, and the two ends of the connecting plate extend to the opposite sides of the mounting part 23 to form elastic arms 32, and each elastic arm 32 is provided with a movable contact part 33 matched with the static conducting member 4.

[0105] As shown in Figs. 13 and 15, the middle part of the connecting plate is bent to form a connecting part 31, so that the connecting plate is approximately V-shaped, the connecting part 31 is arranged in the mounting groove 231 of the mounting part 23, the two ends of the connecting part 31 extend to the outside of the mounting groove 231 to form the elastic arms 32, the length of the elastic arms 32 can be adjusted according to actual needs, the end of each elastic arm 32 is bent to form the movable contact part 33, and the contact surfaces of the two movable contact parts 33 are located on the same plane, which facilitates the matching with the two contact sheets 40 in the static conducting member 4, and the conductive elastic sheet of the movable conducting member 3 adopts the V-shaped connecting plate, so that the movable contact parts 33 are closer to the static conducting member 4 in the axial direction of the driving shaft 2, which is beneficial to reducing the moving stroke of the driving shaft 2 and the movable conducting member 3.

[0106] As shown in Fig. 16, the contact sheet 40 of the static conducting member 4 is plate-shaped, one end of the contact sheet 40 is provided with a static contact part 42, the other end of the contact sheet 40 is provided with a wiring part 41 and a wiring hole, the middle part of the contact sheet 40 is bent once to form an L-shaped structure, the wiring part 41 is inclined and bent towards the static contact part 42, and the end of the static contact part 42 is bent and extended in the direction away from the wiring part 41.

[0107] Further, the assembling part arranged on the module shell 1 is provided with a groove for mounting the contact sheet 40, the bent area between the static contact part 42 and the wiring part 41 is connected with the side wall of the groove, and preferably, each assembling part is further provided with a wiring groove 104 in communication with the outside of the module shell 1, the wiring groove 104 corresponds to the wiring part 41 of each contact sheet 40, which facilitates wiring.

[0108] The circuit breaker comprises a housing, at least one contact unit is arranged in the housing, the contact unit can adopt the prior art, that is, the contact unit at least comprises a pair of wiring terminals and a contact mechanism connected between the pair of wiring terminals, the contact mechanism is driven by an operating mechanism arranged in the housing to open or close the main line of each contact unit; a leakage protection module is connected to the main line of each contact unit, the leakage protection module also adopts the prior art, and the leakage protection module is connected with the leakage start-stop protection module A of the above embodiment.

[0109] Preferably, the housing comprises a base B and a cover combined with the base B, a space for assembling the contact unit, the operating mechanism, the leakage protection module and the leakage start-stop protection module A is formed between the cover and the base B, the leakage start-stop protection module A is fixedly assembled through the module housing 1, in FIG. 1 and FIG. 2, the leakage start-stop protection module A is fixed on the base B, further, the module housing 1 of the leakage start-stop protection module A can also be omitted, the module housing 1 is formed by the housing of the circuit breaker, thus, the operating hole 101 and the matching part 102 and other structures of the module housing 1 in the above embodiment are correspondingly arranged on the housing.

[0110] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0111] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as a limitation on the specific implementation of the present application. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered as falling within the protection scope of the present application.

Claims

1. A leakage current start / stop protection module, comprising a module housing (1) and a drive shaft (2) slidably mounted on the module housing (1), wherein the module housing (1) is provided with an operation hole (101) through which the drive shaft (2) is operated, and wherein a static conductive element (4) and a dynamic conductive element (3) are provided inside the module housing (1), wherein when the drive shaft (2) is pressed to move axially, the dynamic conductive element (3) connected to the drive shaft (2) moves from a first position to a second position, wherein the dynamic conductive element (3) contacts the static conductive element (4) in the first position and separates from the static conductive element (4) in the second position, characterized in that: The drive shaft (2) is rotated to drive the moving conductive element (3) to rotate between the second position and the third position. The drive shaft (2) is unlocked from the module housing (1) in the second position and locked from the module housing (1) in the third position, with the moving conductive element (3) and the stationary conductive element (4) being misaligned.

2. The leakage current start / stop protection module according to claim 1, characterized in that: The static conductive component (4) includes at least one pair of contact pieces (40), each pair of contact pieces (40) being disposed on opposite sides of the drive shaft (2). The dynamic conductive component (3) includes at least one conductive spring, the middle part of which is connected to the drive shaft (2). In the first position, both ends of the conductive spring are in contact with a pair of contact pieces (40). In the second position, both ends of the conductive spring are spaced apart from a pair of contact pieces (40). In the third position, both ends of the conductive spring are misaligned with a pair of contact pieces (40).

3. The leakage current start / stop protection module according to claim 2, characterized in that: It also includes a locking structure located inside the module housing (1), the locking structure being located between the drive shaft (2) and the interior of the module housing (1), and / or, the locking structure being located between the conductive spring and the module housing (1); One end of the drive shaft (2) extends out of the module housing (1) from the operation hole (101) for operating the drive shaft (2), and the other end of the drive shaft (2) moves inside the module housing (1). In the second position, the locking structure is unlocked, and in the third position, the locking structure is locked.

4. The leakage current start / stop protection module according to claim 3, characterized in that: The module housing (1) has a protruding mating part (102) inside. In the second position, the conductive spring is located on the side of the mating part (102) facing away from the operation hole (101). Rotating the drive shaft (2) causes the conductive spring to stop or separate from the side of the mating part (102) facing away from the operation hole (101) to lock or unlock the drive shaft (2). In the first position, the conductive spring is located on the side of the mating part (102) facing the operation hole (101).

5. The leakage current start / stop protection module according to claim 3, characterized in that: The module housing (1) has a protruding mating part (102) inside, and the drive shaft (2) has a protruding locking part (26). Rotating the drive shaft (2) causes the locking part (26) to stop or separate from the mating part (102) on the side opposite to the operating hole (101) for locking or unlocking the drive shaft (2).

6. The leakage current start / stop protection module according to claim 5, characterized in that: The drive shaft (2) has a boss in the middle, and the boss has a mounting groove (231) in the middle. The boss is divided into a locking part (26) and a mounting part (23) by the mounting groove (231). The moving conductive part (3) is assembled in the mounting groove (231) and the middle part of the moving conductive part (3) is connected to the mounting part (23). The two ends of the moving conductive part (3) extend from the opposite sides of the mounting groove (231).

7. The leakage current start / stop protection module according to claim 6, characterized in that: The locking part (26) includes a locking boss (25), the axial length of which is equal to the travel of the drive shaft (2). When the drive shaft (2) rotates to the third position, it is stopped and locked by the locking boss (25) and the mating part (102).

8. The leakage current start / stop protection module according to any one of claims 4-7, characterized in that: The mating part (102) is provided with a guide groove (107). When the drive shaft (2) is pressed, the guide groove (107) and the drive shaft (2) slide together.

9. The leakage current start / stop protection module according to claim 1, characterized in that: The drive shaft (2) is provided with at least one positioning part (24), and the module housing (1) is provided with at least one limiting part (106). The positioning part (24) and the limiting part (106) cooperate to limit the axial movement stroke of the drive shaft (2). An elastic element (5) is provided between the drive shaft (2) and the module housing (1). The elastic element (5) undergoes elastic deformation after the drive shaft (2) is pressed, and the elastic element (5) provides a restoring force for the drive shaft (2) to move to the first position.

10. The leakage current start / stop protection module according to claim 1, characterized in that: One end of the drive shaft (2) serves as an operating part (21), which extends slidably from the operating hole (101). The operating part (21) is used to press and rotate the drive shaft (2), and the rotation angle of the drive shaft (2) is in the range of 30° to 150°.

11. The leakage current start / stop protection module according to claim 10, characterized in that: At least a portion of the operating part (21) protrudes radially along the drive shaft (2) to form a limiting platform (22). An elastic element (5) is sleeved on the drive shaft (2) between the limiting platform (22) and the operating hole (101). The two ends of the elastic element (5) are respectively connected to the limiting platform (22) and the module housing (1).

12. The leakage current start / stop protection module according to claim 1, characterized in that: The conductive spring includes a connecting plate, which is arranged along an axial direction perpendicular to the drive shaft (2). At least a portion of the middle part of the connecting plate is connected to the mounting part (23) provided on the drive shaft (2). The two ends of the connecting plate extend beyond the opposite sides of the mounting part (23) to form elastic arms (32). Each elastic arm (32) is provided with a dynamic contact part (33) that cooperates with the static conductive component (4).

13. The leakage current start / stop protection module according to claim 12, characterized in that: The connecting plate is a strip-shaped straight plate. The connecting plate is attached and fixed to one side surface of the mounting part (23). The two ends of the connecting plate extend beyond the mounting part (23) and are bent along the axial direction of the drive shaft (2) toward the same side of the mounting part (23) to form elastic arms (32). A dynamic contact part (33) is formed at the end of each elastic arm (32), and the two dynamic contact parts (33) are located in the same plane parallel to the connecting plate. Alternatively, the middle part of the connecting plate is bent to form a connecting part (31), the connecting part (31) is disposed in the mounting groove (231) of the mounting part (23), and the two ends of the connecting part (31) extend obliquely to the outside of the mounting groove (231) to form elastic arms (32), the end of each elastic arm (32) is bent to form a contact part, and the contact surfaces of the two contact parts are located on the same plane.

14. The leakage current start / stop protection module according to claim 1, characterized in that: The module housing (1) includes at least two housings that are assembled together. The joint between the two housings is provided with a snap fastener (111) and a slot (121) that engage with each other, and / or the joint between the two housings is provided with a groove and a positioning rib (109) that engage with each other.

15. A circuit breaker, comprising a housing, wherein a residual current protection module is disposed within the housing, characterized in that: The housing also contains a leakage current start / stop protection module (A) as described in claims 1-14.

Images