Leakage protection plug

Abstract

The application provides an electric leakage protection plug, which comprises a shell, a plug pin and a power cord arranged to extend outwardly from the shell, an end of the plug pin in the shell is provided with a static contact, an electric leakage protection device and two pins symmetrically distributed in a second direction are arranged in the shell, one end of the pin is provided with a dynamic contact, the other end of the pin is connected with the power cord, the electric leakage protection device comprises a tripping assembly, the tripping assembly can drive the dynamic contact to move in a third direction and close or separate from the static contact during the movement, and the second direction is perpendicular to the third direction; through the above structure, the tripping assembly is used to drive the pin to move left and right to realize breaking, the contact pressure of the dynamic contact and the static contact is reduced, the probability of poor contact is reduced, and the stability and safety during use are improved.

Description

Technical Field

[0001] This invention relates to the field of plug technology, and more specifically to a leakage protection plug. Background Technology

[0002] With the continuous advancement of technology and people's increasing emphasis on life safety, more and more small household appliances are equipped with leakage protection plugs at the power input end.

[0003] Residual current protection plugs achieve the closing and separation of moving and stationary contacts by applying automatic or manual force to the trip unit. Currently, most residual current protection plugs on the market adopt the mode of separating the moving and stationary contacts vertically. The longitudinal force increases the contact pressure between the moving and stationary contacts, which increases the probability of poor contact and makes it impossible to guarantee the stability and safety of the residual current protection plug. Summary of the Invention

[0004] The purpose of this invention is to provide a leakage current protection plug to solve the above-mentioned problems.

[0005] The technical solution adopted in this invention is as follows:

[0006] A leakage current protection plug includes a housing, with prongs and a power cord extending outward from the housing. The prongs have stationary contacts at their ends within the housing. A leakage current protection device and two pins symmetrically distributed in a second direction are disposed within the housing. One end of each pin has a moving contact, and the other end of each pin is connected to the power cord. The leakage current protection device includes a tripping assembly that can drive the moving contact to move in a third direction and close or separate from the stationary contact during the movement. The second direction is perpendicular to the third direction.

[0007] As a further improved technical solution of the present invention, the tripping assembly includes a pressure plate, a first spring, and a rod arranged in sequence. The two ends of the first spring abut against the pressure plate and the rod, respectively. The rod extends along a first direction, which is perpendicular to a third direction. Two rotating arms are rotatably connected to the end of the rod away from the pressure plate. The two rotating arms are symmetrically arranged about the rod. A driving part is provided at the end of the rotating arm. The moving contact is located on the movement trajectory of the driving part. The first spring can apply force to the rod, thereby causing the rod to move in the first direction. The movement of the rod causes the two rotating arms to be in an open state and a closed state. When the rotating arm changes from the open state to the closed state, the driving part drives the moving contact to separate from or close with the stationary contact.

[0008] As a further improved technical solution of the present invention, the tripping assembly further includes a locking mechanism, the locking mechanism includes a pressure rod and a jump buckle, the rod is provided with a first slot extending in a first direction and a second slot extending in a second direction, the pressure rod can be inserted into or removed from the first slot, the first spring is sleeved outside the pressure rod, and the jump buckle can be inserted into or removed from the second slot, the first direction is perpendicular to the second direction and the third direction; The pressure rod is provided with a slot that cooperates with the jump buckle. When the jump buckle is inserted into the slot, the first spring is in a compressed state and the rotating arm is in an open state; when the jump buckle is removed from the slot, the first spring is in an extended state and the rotating arm is in a retracted state.

[0009] As a further improved technical solution of the present invention, the leakage protection device further includes a leakage detection mechanism, which is used to detect the leakage of the plug. The tripping assembly further includes an electromagnetic mechanism, which can drive the locking mechanism to move, thereby realizing the switching between the compression state and the extension state of the first spring.

[0010] As a further improved technical solution of the present invention, the jump buckle includes a driven part, a supporting part and a locking part. The electromagnetic mechanism is connected to the driven part and drives the driven part to move closer to or away from the second slot. The locking part can be inserted into or removed from the slot. The supporting part extends from the locking part towards the pressure rod and is inserted into the second slot to keep the relative height of the jump buckle and the lifting rod consistent in the second direction.

[0011] As a further improvement of the present invention, the pressure plate is provided with a through third slot, and the end of the pressure rod away from the pressure plate is provided with a pressure rod cap, and the pressure rod passes through the third slot and is inserted into the first slot. A second spring is wound around the pressure rod, and the two ends of the second spring abut against the pressure plate and the pressure rod cap, respectively.

[0012] As a further improvement of the present invention, a bracket for mounting pins is provided inside the housing. The bracket includes a coil mounting base and an electromagnetic mounting base. A positioning shaft is provided inside the coil mounting base. The leakage current detection mechanism includes a mutual inductance coil wound on the positioning shaft. A through hole is provided inside the positioning shaft. Both the positioning shaft and the through hole extend along a second direction. The pin passes through and extends out of the through hole to connect with the power line. The electromagnetic mechanism is provided inside the electromagnetic mounting base.

[0013] As a further improved technical solution of the present invention, the pin includes a first segment, a second segment and a third segment connected end to end in sequence. The first segment, the second segment and the third segment are inclined with respect to their adjacent segments. The first segment passes through the through hole and extends out of the through hole to connect with the power line. The moving contact is located at the end of the third segment away from the second segment. The bracket is provided with a first limiting structure, which is used to limit the position of the second segment and the third segment in the first direction; The bracket is provided with a third limiting structure, which is used to limit the position of the second segment and the third segment in the third direction.

[0014] As a further improved technical solution of the present invention, a cross-shaped insulating plate is provided in the through hole, and the cross-shaped insulating plate is disposed between the two first segments. The cross-shaped insulating plate is used to insulate and separate the two first segments. Both ends of the through hole are provided with a cap, which is used to seal the through hole for dust prevention. An outer insulating plate is provided on the cap, which is used to insulate and separate the two first sections extending out of the through hole.

[0015] As a further improvement of the present invention, the housing includes an upper shell and a lower shell that cooperate with each other, and the upper shell and the lower shell are welded together by ultrasonic silicone welding.

[0016] The beneficial effects of this invention are as follows: With the above structure, the tripping component drives the pin to move left and right to achieve disconnection, which reduces the contact pressure between the moving and stationary contacts, lowers the probability of poor contact, and improves the stability and safety of use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the leakage protection plug; Figure 2 This is a schematic diagram of the internal structure of a leakage current protection plug; Figure 3 This is a schematic diagram of the leakage current protection device; Figure 4 This is a top view of the residual current device (RCD). Figure 5 This is a schematic diagram of the tripping assembly; Figure 6 This is a partial structural diagram of the tripping assembly; Figure 7 This is a partial structural diagram of a leakage current protection device; Figure 8 This is a structural diagram showing the direction of the coil mounting base of the bracket; Figure 9 This is a structural schematic diagram of the electromagnetic mounting base of the bracket; Figure 10 This is a schematic diagram showing the structure of the coil mounting base of the leakage current protection device. Figure 11 This is a schematic diagram of the lower shell structure.

[0018] Wherein: 101-Upper shell, 102-Lower shell, 2-Pin, 201-Stationary contact, 3-Power cord, 4-Pin, 401-First segment, 402-Second segment, 403-Third segment, 404-Moving contact, 5-Electromagnetic mechanism, 61-Pressure plate, 611-Third slot, 612-Second spring seat, 613-Second guide surface, 62-Hanging rod, 621-First slot, 622-Second slot, 623-First spring seat, 63-First spring, 64-Rotating arm, 641-Drive part, 642-Abutment part, 65-Fixed shaft, 66-Pressure rod, 661-Slot, 662-Annular guide surface, 663-Pressure rod cap, 66 4-Rubber sleeve, 67-Jump buckle, 671-Driven part, 672-Support part, 673-Snap-in part, 681-Limiting groove, 682-First guide surface, 683-Limiting block, 69-Second spring, 7-Mutual inductance coil, 81-Coil mounting base, 82-Positioning shaft, 83-Through hole, 831-Mounting groove, 841-First limiting plate, 842-Second limiting plate, 851-First side plate, 852-Second side plate, 853-Third side plate, 86-Cap, 871-Cross insulating plate, 872-Outer insulating plate, 88-Electromagnetic mounting base, 89-Hook, 9-PCB board, 10-Bracket limiting seat, 11-Hook support. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0020] If the description of this invention involves orientation (e.g., up, down, left, right, front, back, outside, inside, etc.), then the orientations involved need to be defined. For example, "To clearly express the positions and directions described in this invention, the operator of the device is used as a reference, the end closer to the operator is the proximal end, and the end farther from the operator is the distal end." Or, the paper can be used as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, then this definition is not necessary.

[0021] A type of leakage protection plug, such as Figures 1-2As shown, the device includes a housing, with a plug 2 and a power cord 3 extending outward from the housing. A stationary contact 201 is provided at the end of the plug 2 within the housing. A leakage protection device and two symmetrically distributed pins 4 are provided within the housing. A moving contact 404 is provided at one end of each pin 4, and the other end of each pin 4 is connected to the power cord 3. The leakage protection device includes a leakage detection mechanism and a tripping assembly. The leakage detection mechanism is used to detect whether the plug has a leakage condition. The leakage detection mechanism includes a mutual inductance coil 7 and a detection wire connected to the mutual inductance coil 7. The tripping assembly can drive the moving contact 404 to perform a third-direction movement, and during the movement, it can close or separate from the stationary contact 201.

[0022] The housing includes an upper shell 101 and a lower shell 102 that cooperate with each other. The upper shell 101 and the lower shell 102 are welded together by ultrasonic silicone welding, which eliminates the need for fasteners such as screws, avoids stripping, eliminates the risk of the overall sealing being affected by screw holes, reduces the number of parts, improves the protection level of the product, and enhances the safety of use.

[0023] like Figures 3-6 As shown, the tripping assembly includes a pressure plate 61, a first spring 63, and a rod 62 arranged in sequence. The two ends of the first spring 63 abut against the pressure plate 61 and the rod 62, respectively. The rod 62 extends along a first direction, which is perpendicular to a third direction. Two rotating arms 64 are provided at the end of the rod 62 away from the pressure plate 61. A fixed shaft 65 is provided between the rotating arms 64 and the rod 62 for rotatable connection. The two rotating arms 64 are symmetrically arranged about the rod 62. A driving part 641 is provided at the end of the rotating arms 64. The moving contact 404 is located on the movement trajectory of the driving part 641. The first spring 63 can apply force to the rod 62, thereby causing the rod 62 to move in the first direction. The movement of the rod 62 causes the two rotating arms 64 to have an open state and a closed state. When the rotating arms 64 change from the open state to the closed state, the driving part 641 drives the moving contact 404 to separate or close from the stationary contact 201.

[0024] In a first embodiment of the present invention, taking the axis of the boom 62 as the dividing line, when the moving contact 404 and the stationary contact 201 located on the same side of the axis of the boom 62 are both located between the rotating arm 64 and the boom 62 on that side, and the moving contact 404 is disposed close to the rotating arm 64, then when the rotating arm 64 changes from an open state to a closed state, the moving contact 404 moves towards the stationary contact 201, causing the moving contact 404 to close with the stationary contact 201; when the rotating arm 64 changes from a closed state to an open state, the moving contact 404 moves away from the stationary contact 201, causing the moving contact 404 to separate from the stationary contact 201.

[0025] In a second embodiment of the present invention, taking the axis of the boom 62 as the dividing line, when both the moving contact 404 and the stationary contact 201 on the same side of the axis of the boom 62 are disposed away from the boom 62 relative to the rotating arm 64 on that side, and the moving contact 404 is disposed close to the rotating arm 64, then when the rotating arm 64 changes from an open state to a closed state, the moving contact 404 moves away from the stationary contact 201, causing the moving contact 404 to separate from the stationary contact 201; when the rotating arm 64 changes from a closed state to an open state, the moving contact 404 moves closer to the stationary contact 201, causing the moving contact 404 to close with the stationary contact 201.

[0026] The specific technical solution will now be described based on the second embodiment.

[0027] The tripping assembly also includes a locking mechanism for locking or unlocking the first spring 63. When the locking mechanism locks the first spring 63, the first spring 63 is in a compressed state and the rotating arm 64 is in an open state. When the locking mechanism unlocks the first spring 63, the first spring 63 is in an extended state and the rotating arm 64 is in a retracted state.

[0028] The tripping assembly also includes an electromagnetic mechanism 5, which can drive the locking mechanism to switch between the compressed state and the extended state of the first spring 63.

[0029] As an embodiment of the present invention, the locking mechanism includes a pressure rod 66 and a jump buckle 67. The lifting rod 62 is provided with a first slot 621 extending in a first direction and a second slot 622 extending in a second direction. The second direction is perpendicular to both the first direction and the third direction. The pressure rod 66 can be inserted into or removed from the first slot 621, and the jump buckle 67 can be inserted into or removed from the second slot 622. The first spring 63 is sleeved on the outside of the pressure rod 66. The pressure rod 66 is provided with a slot 661 that cooperates with the jump buckle 67. When the jump buckle 67 is inserted into the slot 661, the first spring 63 is in a compressed state; when the jump buckle 67 is removed from the slot 661, the first spring 63 is in an extended state.

[0030] like Figure 7 As shown, the jump buckle 67 includes a driven part 671, a supporting part 672, and a locking part 673. The electromagnetic mechanism 5 is connected to the driven part 671 and drives the driven part 671 to move closer to or away from the second slot 622. The locking part 673 can be inserted into or removed from the slot 661. The supporting part 672 extends from the locking part 673 toward the pressure rod 66 and is inserted into the second slot 622 to keep the jump buckle 67 and the lifting rod 62 at the same relative height in the second direction.

[0031] The lower end of the pressure rod 66 is provided with an annular guide surface 662, which facilitates the insertion of the pressure rod 66 into the first slot 621.

[0032] A first spring 63 and a first spring 63 seat 623 are provided on the rod 62. The first spring 63 is wound around the first spring 63 and the first spring 63 seat 623. The axis of the first spring 63 is parallel to the center line of the first slot 621.

[0033] like Figure 11 As shown, the tripping assembly also includes a tripping support disposed on the lower housing 102. The tripping support has a limiting groove 681 within it, allowing the boom 62 to slide in a first direction within the limiting groove 681. Simultaneously, the limiting groove 681 guides the movement of the boom 62. A limiting block 683 is disposed at the bottom of the limiting groove 681, limiting the extreme positions of the boom 62. The tripping support has a clearance groove, which allows for clearance of the movement of the rotating arm 64.

[0034] Arc-shaped first guide surfaces 682 are provided on both sides of the limiting slide groove 681. During the downward movement of the boom 62 and the rotating arm 64, the rotating arm 64 abuts against the first guide surface 682. The first guide surface 682 is used to limit the movement trajectory of the rotating arm 64 during rotation.

[0035] To improve the convenience and safety of plug use, a manual tripping option has been added to the above-mentioned automatic tripping design.

[0036] The pressure plate 61 is provided with a through third slot 611, the center line of the third slot 611 coincides with the center line of the first slot 621, and the end of the pressure rod 66 away from the pressure plate 61 is provided with a pressure rod cap 663, and the pressure rod 66 passes through the third slot 611 and is inserted into the first slot 621. A second spring 69 is wound around the pressure rod 66, and a second spring 69 seat 612 is provided on the pressure plate 61. The second spring 69 is wound around the second spring 69 seat 612. The axis of the second spring 69 is parallel to the center line of the third slot 611. The two ends of the second spring 69 abut against the pressure plate 61 and the pressure rod cap 663, respectively.

[0037] The rotating arm 64 is also provided with an abutment part 642, which is located on the side of the rotating arm 64 near the pressure plate 61. The bottom of the pressure plate 61 is provided with an arc-shaped second guide surface 613. When manually disengaged, that is, when the pressure plate 61 and the rotating arm 64 move downward together, the abutment part 642 abuts against the second guide surface 613 and moves along the second guide surface 613 during rotation. The second guide surface 613 is used to limit the movement trajectory of the abutment part 642.

[0038] The pressure rod 66 is covered with a rubber sleeve 664, which abuts against the pressure rod cap 663 and the pressure plate 61 to protect the pressure rod 66.

[0039] In the initial state, the electromagnetic mechanism 5 is in the initial position, the first spring 63 is in the compressed state, the snap-in part 673 of the snap-in buckle 67 snaps into the slot 661 so that the first spring 63 remains compressed, the boom 62 is not subject to external force, the rotating arm 64 is in the open state, and the moving contact 404 is kept closed with the stationary contact 201 under the external force of the driving part 641. In use, the automatic tripping mechanism works as follows: When the leakage detection mechanism detects a leakage, it sends a leakage signal to the control module. The control module then sends a motion signal to the electromagnetic mechanism 5. The electromagnetic mechanism 5 drives the driven part 671 to move away from the pressure rod 66. The driven part 671 exits the slot 661, the first spring 63 is unlocked and extends to apply external force to the lifting rod 62. The lifting rod 62 moves away from the pressure plate 61, and the rotating arm 64 retracts and moves away from the moving contact 404. As a result, the moving contact 404 moves away from the stationary contact 201 until the moving contact 404 separates from the stationary contact 201, and the leakage protection plug is de-energized.

[0040] The working principle of the manual trip is as follows: Press down on the pressure rod cap 663, the second spring 69 is compressed and transmits pressure to the pressure plate 61, the pressure plate 61 moves closer to the lifting rod 62, the pressure plate 61 transmits pressure to the first spring 63, the first spring 63 pushes the lifting rod 62 to move, the rotating arm 64 retracts and moves away from the moving contact 404, so that the moving contact 404 moves away from the stationary contact 201 until the moving contact 404 separates from the stationary contact 201, and the leakage protection plug is de-energized.

[0041] A bracket is provided on the lower shell 102. The bracket and the pin 4 are combined to form a modular moving contact 404 assembly. The bracket includes a coil mounting base 81. A positioning shaft 82 is provided in the coil mounting base 81. The positioning shaft 82 extends along a second direction. The mutual inductance coil 7 is wound on the positioning shaft 82. A through hole 83 is provided in the positioning shaft 82. The extension direction of the through hole 83 is consistent with the extension direction of the positioning shaft 82. One end of the pin 4 passes through and extends out of the through hole 83 and is connected to the power line 3.

[0042] The pin 4 includes a first segment 401, a second segment 402, and a third segment 403 connected end to end in sequence. The first segment 401, the second segment 402, and the third segment 403 are arranged at an angle to their adjacent segments. The first segment 401 passes through the through hole 83 and extends out of the through hole 83 to connect with the power line 3. The moving contact 404 is located at the end of the third segment 403 away from the second segment 402.

[0043] An installation groove 831 is provided in the through hole 83. The installation groove 831 is used to install the first segment 401 and limit the first segment 401.

[0044] like Figures 8-10 As shown, the bracket is provided with a first limiting structure, which is used to limit the position of the second segment 402 and the third segment 403 in a first direction. The first limiting structure includes a first limiting plate 841 and a second limiting plate 842.

[0045] The bracket is provided with a third limiting structure, which is used to limit the position of the second segment 402 and the third segment 403 in the third direction. The third limiting structure includes a first side plate 851, a second side plate 852, and a third side plate 853. The first side plate 851 and the second side plate 852 are inclinedly connected. The second segment 402 extends along the first side plate 851, and the third segment 403 extends along the second side plate 852. The third side plate 853 abuts against the third segment 403. The second side plate 852 and the third side plate 853 are distributed on both sides of the third segment 403. The moving contact 404 can perform a third-direction movement and close or separate from the stationary contact 201 during the movement.

[0046] A cross-shaped insulating plate 871 is provided in the through hole 83. The cross-shaped insulating plate 871 is disposed between the two first segments 401. The cross-shaped insulating plate 871 is used to insulate and separate the two first segments 401. The cross-shaped structure can better maintain the interval between the two first segments 401.

[0047] A cover 86 is provided at both ends of the through hole 83 along the axial direction. The cover 86 is used to seal the through hole 83 to prevent dust or other objects from falling into the through hole 83 and affecting the operation of the mutual inductance coil 7.

[0048] The end of the first segment 401 that is away from the second segment 402—that is, the end that extends out of the through hole 83 and connects to the power line 3—is the terminal. An outer insulating plate 872 is provided on the cover 86. The outer insulating plate 872 is used to insulate and separate the two terminals.

[0049] The bracket also includes an electromagnetic mounting base 88, which is disposed between the second section 402 and the third section 403. The center line of the shunt coil of the electromagnetic mechanism 5 is aligned with the center line of the through hole 83. The modular moving contact 404 assembly provides a mounting base for the leakage current detection mechanism and the electromagnetic mechanism 5 while fixing the pin 4. The integrated design greatly saves space.

[0050] The bracket also includes a hook 89 extending in a first direction. The hook 89 is used to restrict the relative position between the bracket and the external parts. In this embodiment, the control module is a PCB board 9, and the hook 89 restricts the position between the PCB board 9 and the bracket.

[0051] The bracket is made of insulating material. In addition to providing a winding reference for the mutual inductance coil 7, the positioning shaft 82 is also used to insulate and block the mutual inductance coil 7 and the pin 4.

[0052] like Figure 11 As shown, the lower shell 102 is provided with a bracket limiting seat 10 and a hook support seat 11. The bracket is disposed inside the bracket limiting seat 10, and the hook support seat 11 is used to support the hook 89.

[0053] The leakage protection plug provided by this invention, through the above-described structure, changes the conventional vertical separation of the moving and stationary contacts 201 to horizontal separation. The separation is achieved by using a rotating arm type 64 tripping assembly to drive the pin 4 to move left and right, which reduces the contact pressure of the moving and stationary contacts 201, reduces the probability of poor contact, and improves the stability and safety of use. The integrated bracket design makes full use of space, which is conducive to the installation and fixation of the pin 4 and realizes the miniaturization of the plug.

[0054] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0055] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A leakage current protection plug, characterized in that: The device includes a housing, and extends outward from the housing with a pin (2) and a power cord (3). The end of the pin (2) inside the housing is provided with a stationary contact (201). The housing is provided with a leakage protection device and two pins (4) symmetrically distributed about a second direction. One end of the pin (4) is provided with a moving contact (404), and the other end of the pin (4) is connected to the power cord (3). The leakage protection device includes a tripping assembly, which can drive the moving contact (404) to move in a third direction and close or separate from the stationary contact (201) during the movement. The second direction is perpendicular to the third direction. The tripping assembly includes a pressure plate (61), a first spring (63), and a rod (62) arranged in sequence. The two ends of the first spring (63) abut against the pressure plate (61) and the rod (62) respectively. The rod extends along a first direction, which is perpendicular to a third direction. Two rotating arms (64) are rotatably connected to the end of the rod (62) away from the pressure plate (61). The two rotating arms (64) are symmetrically arranged about the rod (62). The ends of the rotating arms (64) are provided with a drive mechanism. The moving part (641) has a moving contact (404) located on the movement trajectory of the driving part (641). The first spring (63) can apply force to the boom (62) to make the boom (62) move in the first direction. The movement of the boom (62) causes the two rotating arms (64) to be in an open state and a closed state. When the rotating arm (64) changes from the open state to the closed state, the driving part (641) drives the moving contact (404) to separate or close from the stationary contact (201). The tripping assembly also includes a locking mechanism, which includes a pressure rod (66) and a jump buckle (67). The rod (62) is provided with a first slot (621) extending in a first direction and a second slot (622) extending in a second direction. The pressure rod (66) can be inserted into or removed from the first slot (621). The first spring (63) is sleeved on the outside of the pressure rod (66). The jump buckle (67) can be inserted into or removed from the second slot (622). The first direction is perpendicular to the second direction and the third direction. The pressure rod (66) is provided with a slot (661) that cooperates with the jump buckle (67). When the jump buckle (67) is inserted into the slot (661), the first spring (63) is in a compressed state and the rotating arm (64) is in an open state. When the jump buckle (67) is removed from the slot (661), the first spring (63) is in an extended state and the rotating arm (64) is in a retracted state.

2. The leakage protection plug according to claim 1, characterized in that: The leakage protection device also includes a leakage detection mechanism, which is used to detect leakage in the plug. The tripping assembly also includes an electromagnetic mechanism (5), which can drive the locking mechanism to switch between the compressed state and the extended state of the first spring (63).

3. The leakage protection plug according to claim 2, characterized in that: The jump buckle (67) includes a driven part (671), a support part (672), and a locking part (673). The electromagnetic mechanism (5) connects to the driven part (671) and drives the driven part (671) to move closer to or away from the second slot (622). The locking part (673) can be inserted into or removed from the slot (661). The support part (672) extends from the locking part (673) toward the pressure rod (66) and is inserted into the second slot (622) to keep the jump buckle (67) and the lifting rod (62) at the same relative height in the second direction.

4. The leakage protection plug according to claim 3, characterized in that: The pressure plate (61) is provided with a through third slot (611), and the end of the pressure rod (66) away from the pressure plate (61) is provided with a pressure rod cap (663). The pressure rod (66) passes through the third slot (611) and is inserted into the first slot (621). A second spring (69) is wound around the pressure rod (66), and the two ends of the second spring (69) abut against the pressure plate (61) and the pressure rod cap (663) respectively.

5. The leakage protection plug according to claim 2, characterized in that: The housing is provided with a bracket (8) for mounting pins (4). The bracket (8) includes a coil mounting base (81) and an electromagnetic mounting base (88). A positioning shaft (82) is provided in the coil mounting base (81). The leakage detection mechanism includes a mutual inductance coil (7). The mutual inductance coil (7) is wound on the positioning shaft (82). A through hole (83) is provided in the positioning shaft (82). The positioning shaft (82) and the through hole (83) both extend along the second direction. The pins (4) pass through and extend out of the through hole (83) and are connected to the power line (3). The electromagnetic mechanism (5) is provided in the electromagnetic mounting base (88).

6. The leakage protection plug according to claim 5, characterized in that: The pin (4) includes a first segment (401), a second segment (402) and a third segment (403) connected end to end in sequence. The first segment (401), the second segment (402) and the third segment (403) are arranged at an angle to their adjacent segments. The first segment (401) passes through the through hole (83) and extends out of the through hole (83) to connect with the power line (3). The moving contact (404) is located at the end of the third segment (403) away from the second segment (402). The bracket (8) is provided with a first limiting structure, which is used to limit the position of the second segment (402) and the third segment (403) in the first direction; The bracket (8) is provided with a third limiting structure, which is used to limit the position of the second segment (402) and the third segment (403) in the third direction.

7. The leakage protection plug according to claim 6, characterized in that: A cross-shaped insulating plate (871) is provided in the through hole (83). The cross-shaped insulating plate (871) is disposed between the two first segments (401). The cross-shaped insulating plate (871) is used to insulate and separate the two first segments (401). A cover (86) is provided at both ends of the through hole (83). The cover (86) is used to seal the through hole (83) for dust prevention. An outer insulating plate (872) is provided on the cover (86). The outer insulating plate (872) is used to insulate and separate the parts of the two first segments (401) that extend out of the through hole (83).

8. The leakage protection plug according to claim 1, characterized in that: The housing includes an upper shell (101) and a lower shell (102) that cooperate with each other, and the upper shell (101) and the lower shell (102) are ultrasonically welded together with silicone.

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