Leakage protection electric plug

Abstract

The utility model provides a leakage protection electric plug. The leakage protection electric plug comprises a housing, a lifting slide block, a reset button and a tripping card. Two inserting pieces are arranged at the lower end of the shell in a spaced mode, and elastic pieces corresponding to the inserting pieces are symmetrically installed in the shell; the lifting sliding block is mounted in the shell in a lifting manner, is propped against the elastic sheet and is used for pushing the elastic sheet to be in contact with the insertion sheet so as to realize electrical conduction; the reset key is installed on the shell in a lifting mode, and a clamping head is arranged at the end, arranged in the lifting sliding block, of the reset key. The tripping clamping piece is installed on the lifting sliding block in a sliding mode in the horizontal direction. The end, inserted into the lifting sliding block, of the tripping clamping piece is provided with a clamping groove capable of being clamped with the clamping head. During earth leakage protection, the tripping clamping piece slides in the horizontal direction, the clamping groove is separated from the clamping head, the lifting sliding block descends, and then the elastic piece is separated from the insertion piece; according to the electric leakage protection plug provided by the utility model, the defects that the number of parts of the existing electric plug is large and the action of the parts is tedious are overcome.

Description

Technical Field

[0001] The utility model relates to the field of electric connectors, in particular to an electric plug for leakage protection. Background Art

[0002] At present, people connect household appliances to the mains power supply through power plugs. Most of the power plugs on the market now have the following structure: they include a shell, on which are mounted two or three exposed pins and power cable wires connected to the pins. When the appliance is produced, the power cable wire of the power plug is directly fixedly connected to the power contact on the circuit board inside the appliance to form an electrical connection. When the household appliance needs to be used, it is only necessary to insert the pins of the power plug into the socket, thereby realizing the connection between the household appliance and the mains power supply.

[0003] For the purpose of safety, people have designed electric plugs with leakage protection function. For example, patent number CN102025086B discloses a power plug with leakage protection function. When leakage protection is applied, the tripping coil is powered off, the static armature loses its magnetic force, the movable armature is released, the ejection spring is stretched to push the movable armature out, the cross arm is pushed by the passive armature to move horizontally so that the latch and the hook are released, and the reset spring drives the sliding fastener to move upward and reset. Since the latch and the hook are separated, the inclined push surface pushes the upper end of the toggle member to the upper left, so that the lower end of the toggle member presses the cross arm, and slides downward to press the movable armature under the cooperation of the inclined surface and the inclined sliding surface. The cross arm moves downward, the spring is reset, the movable contact and the static contact are separated and disconnected, and the load and the pin are disconnected, so that the power supply stops supplying power to the electrical equipment, preventing the danger of death due to electric shock, thereby protecting personal safety. In the above structure, there are many parts, and the movement of the parts is complicated during leakage protection, the manufacturing cost is high, and the use effect is poor. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The problem to be solved by the utility model is to provide an electric plug with leakage protection, so as to overcome the defects of the existing electric plug having more parts and complicated parts operation.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a leakage protection electric plug, comprising:

[0008] The housing has two inserts at a distance from each other at its lower end, and springs corresponding to the inserts are symmetrically installed inside the housing;

[0009] A lifting slider is installed in the housing in a lifting manner and is placed against the spring sheet to push the spring sheet to make it contact with the plug sheet to achieve electrical conduction;

[0010] The reset button can be installed on the housing in a liftable manner. A chuck is provided at one end of the reset button placed inside the lifting slider.

[0011] The release card is slidably installed on the lifting slider in the horizontal direction. A card slot that can be engaged with the chuck is provided at one end of the release card inserted into the lifting slider. During leakage protection, the release card slides in the horizontal direction, the card slot disengages from the chuck, the lifting slider descends, and then the elastic piece disengages from the insertion piece.

[0012] In this solution, through the cooperation of the reset button, the lifting slider and the release card, it is possible to achieve the disengagement of the elastic piece and the insertion piece during leakage protection. The overall number of components is small, the movement of the components is simple and coherent, the disconnection is reliable, and the use effect is good.

[0013] In some embodiments, the release card includes a horizontally arranged insertion wall. Insertion plates are symmetrically and spacedly arranged on the insertion wall. Slots adapted to the insertion plates are provided on the lifting slider. The card slot with an outer opening is formed between the two insertion plates. A baffle that can abut against the chuck is provided inside the card slot.

[0014] In this solution, when the chuck is engaged with the card slot, the upper part of the chuck is placed inside the card slot, and the chuck abuts against the lower part of the baffle. The clamping is firm and the limiting effect is good. And when the release card slides horizontally to one side, the disengagement of the chuck and the card slot can be achieved, which is convenient for tripping and ensures the reliability of the disconnection function.

[0015] In some embodiments, the release card further includes a connecting wall placed outside the lifting slider. The connecting wall is perpendicularly arranged with the insertion wall. Limiting plates are symmetrically and spacedly arranged on the connecting wall. A chute with an open top is formed between the two limiting plates.

[0016] In some embodiments, an electromagnet assembly installed on one side of the lifting slider is further included. The electromagnet assembly includes a release pull rod that can slide in the horizontal direction. One end of the release pull rod is drivingly connected to the release card. A first contraction part is provided at the end of the release pull rod facing the release card. The first contraction part is placed inside the chute.

[0017] In this structure, through the cooperation of the chute and the first contraction part, not only can the driving connection between the release pull rod and the release card be achieved, but also the release card can move downward together with the lifting slider, so as to facilitate lifting the lifting slider through the release card when pressing the reset button.

[0018] In some embodiments, a second contraction part is provided at the upper part of the chuck. A first inclined pushing surface is provided at the upper end of the second contraction part, and a second inclined pushing surface is provided at the lower side of the chuck. When the reset button is pressed, the card slot is separated from the chuck through the first inclined pushing surface, and the lifting slider descends. When the reset button is pressed again, the card slot is re-engaged with the chuck through the second inclined pushing surface, and the lifting slider ascends.

[0019] With this structure, by providing the cooperation of the first inclined pushing surface and the second inclined pushing surface, it is convenient for testing and resetting, and the operation is simple.

[0020] In some embodiments, a reset button spring is installed between the reset button and the lifting slider. The reset button spring is sleeved on the reset button, and the reset button spring always makes the lifting slider tend to move downward. During leakage protection, the lifting slider descends under the elastic forces of the reset button spring and the elastic sheet.

[0021] In some embodiments, the housing includes a support. The lifting slider is vertically movably installed in the support. Two elastic sheets are symmetrically arranged on both sides of the support. Push rods are symmetrically arranged at both ends of the lifting slider. The push rods extend to the outside of the support and abut against the lower ends of the elastic sheets. A reinforcing rib plate is arranged between the push rod and the lifting slider. A limiting flange is arranged at the outer end of the push rod. A limiting groove adapted to the elastic sheet is formed between the limiting flange and the reinforcing rib plate.

[0022] In some embodiments, a static contact is installed at one end of the insertion piece connecting the support. A moving contact corresponding to the static contact is installed on the elastic sheet. When the moving contact contacts the static contact, the elastic sheet is electrically connected to the insertion piece.

[0023] In some embodiments, the electromagnet assembly further includes a tripping bracket fixed in the support of the housing. The tripping pull rod is horizontally slidably installed in the tripping bracket. A tripping spring is installed between the tripping bracket and the tripping pull rod. The tripping spring always makes the tripping pull rod tend to move towards the lifting slider.

[0024] In some embodiments, the housing further includes an upper cover and a lower cover which are fixedly connected to each other. The support is fixed on the lower cover, and a PCB board is installed at the upper end of the support. A magnetic ring assembly is installed on one side of the support, and the magnetic ring assembly is connected with a cable. A test button is vertically movably installed on the upper cover. A test button spring is installed between the test button and the PCB board. A light guide column is installed between the test button and the reset button.

[0025] (III) Beneficial effects

[0026] A leakage protection electric plug provided by the utility model, through the cooperation of a lifting slider, a reset button and a tripping card. When there is a leakage protection, the tripping pull rod drives the tripping card to move away from the lifting slider, so that the chuck is separated from the card slot. At this time, under the elastic force of the reset button spring and the elastic sheet, the lifting slider and the tripping card jointly descend to a low position, so that the insertion piece and the elastic sheet are separated, realizing the disconnection between the load and the insertion piece; this leakage protection electric plug has fewer parts and low manufacturing cost; when disconnecting, the actions of the components are simple and coherent, the function is reliable, and the use effect is good, overcoming the defects of more components and cumbersome actions of existing electric plugs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0028] Figure 1 Is a three-dimensional view of a leakage protection electric plug of the present utility model;

[0029] Figure 2 Is a three-dimensional view of another perspective of a leakage protection electric plug of the present utility model;

[0030] Figure 3 Is an exploded view of a leakage protection electric plug of the present utility model;

[0031] Figure 4 Is a sectional view of a leakage protection electric plug of the present utility model when it is electrically conductive;

[0032] Figure 5 Is a sectional view of a leakage protection electric plug of the present utility model when there is a leakage protection;

[0033] Figure 6 Is a three-dimensional view of the insertion piece and the elastic sheet of a leakage protection electric plug of the present utility model when they are electrically conductive;

[0034] Figure 7 Is a three-dimensional view of the insertion piece and the elastic sheet of a leakage protection electric plug of the present utility model when they are separated;

[0035] Figure 8 Is a three-dimensional view of the connection of the reset button, the lifting slider, the tripping card, the tripping pull rod and the elastic sheet of a leakage protection electric plug of the present utility model;

[0036] Figure 9 Is a three-dimensional view of the connection of the tripping pull rod and the tripping card of a leakage protection electric plug of the present utility model;

[0037] Figure 10 Explosion diagram of the lifting slider, reset button and tripping card of a leakage protection electric plug of the present utility model;

[0038] Figure 11 Three-dimensional diagram of the connection between the reset button and the tripping card of a leakage protection electric plug of the present utility model;

[0039] Figure 12 Three-dimensional diagram of the tripping card of a leakage protection electric plug of the present utility model;

[0040] Figure 13 Three-dimensional diagram of the reset button of a leakage protection electric plug of the present utility model;

[0041] The corresponding component names of the reference numerals in the figures are: 1, housing; 11, support; 12, upper cover; 13, lower cover; 14, magnetic ring assembly; 15, cable; 2, lifting slider; 201, slot; 202, push rod; 203, reinforcing rib plate; 204, limiting flange; 205, limiting groove; 3, reset button; 31, reset button spring; 301, chuck; 302, second contraction part; 303, first inclined pushing surface; 304, second inclined pushing surface; 4, tripping card; 401, card slot; 402, inserting wall; 403, inserting plate; 404, baffle; 405, connecting wall; 406, limiting plate; 407, sliding groove; 5, electromagnet assembly; 51, tripping pull rod; 52, tripping bracket; 53, tripping spring; 511, first contraction part; 6, inserting piece; 601, static contact; 7, elastic piece; 701, moving contact; 8, PCB board; 9, test button; 91, test button spring; 10, light guide column. Specific embodiments

[0042] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] The following illustrates the implementation manners of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0044] It should be noted that the following describes various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on this application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement an apparatus and / or practice a method. Additionally, this apparatus and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0045] It should also be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of this application. Only the components related to this application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0046] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that these examples can be practiced without these specific details.

[0047] The following describes the technical solutions provided by each embodiment of this application in conjunction with the accompanying drawings.

[0048] Refer to Figures 1 to 13 , this utility model provides a leakage protection electrical plug, which includes a housing 1, a lifting slider 2, a reset button 3, and a tripping card 4.

[0049] Refer to Figure 4 and Figure 6 , two insertion pieces 6 are arranged at intervals at the lower end of the housing 1. The insertion pieces 6 are made of metal and can achieve electrical conduction. Elastic pieces 7 corresponding to the insertion pieces 6 are symmetrically installed inside the housing 1. The two elastic pieces 7 respectively correspond to the two insertion pieces 6 one by one. The elastic pieces 7 are made of metal and can achieve electrical conduction. The elastic pieces 7 have a certain elasticity. Under normal conditions, the elastic force of the elastic pieces 7 causes the elastic pieces 7 to be separated from the insertion pieces 6. The lifting slider 2 is vertically movably installed inside the housing 1, and the lifting slider 2 abuts against the elastic pieces 7, used to overcome the elastic force of the elastic pieces 7 and push the elastic pieces 7 to make the elastic pieces 7 contact the insertion pieces 6 to achieve electrical conduction; when the lifting slider 2 rises to a high position, the lifting slider 2 pushes the elastic pieces 7 to contact the insertion pieces 6 to achieve electrical conduction; when the lifting slider 2 descends to a low position, the elastic pieces 7 are separated from the insertion pieces 6, and the power supply is disconnected.

[0050] Refer to Figures 3 to 8, the reset button 3 is vertically movably mounted on the housing 1. The reset button 3 is located directly above the lifting slider 2, and the keycap of the reset button 3 is exposed outside the housing 1 for easy pressing. One end of the reset button 3 extends towards the inside of the housing 1 and is placed inside the lifting slider 2. A clamping head 301 is integrally provided at the end of the reset button 3 placed inside the lifting slider 2. The release card 4 is horizontally slidably mounted on the lifting slider 2, and one end of the release card 4 is inserted into the lifting slider 2 so that the release card 4 can descend together with the lifting slider 2. A clamping groove 401 that can be engaged with the clamping head 301 is provided at the end of the release card 4 inserted into the lifting slider 2. When the clamping head 301 engages with the clamping groove 401, the reset button 3 restricts the downward movement of the lifting slider 2 so that the lifting slider 2 is in the high position. At this time, the elastic piece 7 contacts the insertion piece 6 to achieve electrical conduction. During leakage protection, the release card 4 slides horizontally away from the lifting slider 2. At this time, the clamping groove 401 disengages from the clamping head 301, and the reset button 3 cannot restrict the downward movement of the lifting slider 2. Under the elastic forces of the reset button spring 31 and the elastic piece 7, the lifting slider 2 and the release card 4 descend, and further the elastic piece 7 disengages from the insertion piece 6, and the power supply is disconnected.

[0051] With this structure, through the cooperation of the reset button 3, the lifting slider 2 and the release card 4, it is possible to achieve the disengagement of the elastic piece 7 and the insertion piece 6 during leakage protection. The overall number of components is small, the actions of the components are simple and coherent, the disconnection is reliable, and the use effect is good.

[0052] In some embodiments, as Figures 10 to 12 shown, the release card 4 includes a horizontally arranged insertion wall 402. Insertion plates 403 are symmetrically and spacedly arranged on the insertion wall 402. Slots 201 adapted to the insertion plates 403 are provided on the lifting slider 2. The insertion plates 403 are inserted into the slots 201 and can slide in the slots 201. A clamping groove 401 with an outer opening is formed between the two insertion plates 403. A baffle 404 that can abut against the clamping head 301 is provided on the inner side of the clamping groove 401.

[0053] With this structure, when the clamping head 301 is engaged with the clamping groove 401, the upper part of the clamping head 301 is placed inside the clamping groove 401, and the clamping head 301 abuts against the lower side of the baffle 404. The clamping is firm and the limiting effect is good. And when the release card 4 slides horizontally to one side, the disengagement of the clamping head 301 and the clamping groove 401 can be achieved, which is convenient for releasing the buckle and ensures the reliability of the disconnection function.

[0054] In some embodiments, as Figure 8 , Figure 9 and Figure 12As shown, the tripping card 4 further includes a connecting wall 405 disposed outside the lifting slider 2, and the connecting wall 405 is perpendicularly arranged with the plugging wall 402. Limiting plates 406 are symmetrically and spaced on the connecting wall 405, and a chute 407 with an open top is formed between the two limiting plates 406. The leakage protection electric plug further includes an electromagnet assembly 5 installed on one side of the lifting slider 2, and the electromagnet assembly 5 is used to drive the tripping card 4 to slide horizontally. The electromagnet assembly 5 includes a tripping pull rod 51 that can slide along the horizontal direction, and one end of the tripping pull rod 51 is drivingly connected to the tripping card 4; a first contraction portion 511 is provided at the end of the tripping pull rod 51 facing the tripping card 4, and the first contraction portion 511 is placed in the chute 407.

[0055] With this structure, through the cooperation of the chute 407 and the first contraction portion 511, not only can the driving connection between the tripping pull rod 51 and the tripping card 4 be realized, but also the tripping card 4 can move downward together with the lifting slider 2, so that it is convenient to lift the lifting slider 2 through the tripping card 4 when pressing the reset button.

[0056] In some embodiments, as Figure 4 、 Figure 5 、 Figure 11 and Figure 13 shown, a second contraction portion 302 is provided on the upper part of the chuck 301, and the second contraction portion 302 is used for clamping with the card slot 401. A first inclined pushing surface 303 is provided at the upper end of the second contraction portion 302, and the first inclined pushing surface 303 is used to push the tripping card 4 during testing to disengage the card slot 401 from the chuck 301 and cut off the power supply. A second inclined pushing surface 304 is provided on the lower side of the chuck 301, and the second inclined pushing surface 304 is used to push the tripping card 4 during resetting to engage the card slot 401 with the chuck 301 and turn on the power supply. During testing, when pressing the reset button 3, the reset button 3 moves downward, and the first inclined pushing surface 303 pushes the tripping card 4 to move away from the lifting slider 2, the card slot 401 disengages from the chuck 301, and the lifting slider 2 descends; during resetting, when pressing the reset button 3 again, the reset button 3 moves downward, and the tripping card 4 is pushed to move away from the lifting slider 2 through the second inclined pushing surface 304. The chuck 301 is placed under the tripping card 4. When the reset button 3 is released, the card slot 401 is re-engaged with the chuck 301 and drives the lifting slider 2 to rise.

[0057] With this structure, by setting the cooperation of the first inclined pushing surface 303 and the second inclined pushing surface 304, it is convenient for testing and resetting, and the operation is simple.

[0058] In some embodiments, as Figure 4As shown, a reset button spring 31 is installed between the reset button 3 and the lifting slider 2. The reset button spring 31 is sleeved on the reset button 3, and the reset button spring 31 always makes the lifting slider 2 tend to move downward. During leakage protection, the lifting slider 2 descends under the elastic forces of the reset button spring 31 and the elastic sheet 7. With this structure, by setting the reset button spring 31, when the chuck 301 disengages from the release card 4, the reset button spring 31 can push the lifting slider 2 downward, ensuring reliable disconnection and the reliability of the function.

[0059] In some embodiments, such as Figure 3 , Figure 8 and Figure 10 As shown, the housing 1 includes a support 11. The lifting slider 2 is installed in the support 11 in a liftable manner. Two elastic sheets 7 are symmetrically arranged on both sides of the support 11. Push rods 202 are symmetrically arranged at both ends of the lifting slider 2. The push rods 202 extend to the outside of the support 11 and abut against the lower ends of the elastic sheets 7. A reinforcing rib plate 203 is arranged between the push rods 202 and the lifting slider 2. A limiting flange 204 is arranged at the outer end of the push rod 202. A limiting groove 205 adapted to the elastic sheet 7 is formed between the limiting flange 204 and the reinforcing rib plate 203, and the elastic sheet 7 is placed in the limiting groove 205.

[0060] With this structure, the elastic sheet 7 is limited by the limiting groove 205 to prevent the elastic sheet 7 from disengaging from the push rod 202, ensuring that when the lifting slider rises, it can push the elastic sheet 7 to contact the insertion piece 6, resulting in good use effects.

[0061] In some embodiments, such as Figure 6 and Figure 7 As shown, a static contact 601 is installed at one end of the insertion piece 6 connected to the support 11. A moving contact 701 corresponding to the static contact 601 is installed on the elastic sheet 7. When the moving contact 701 contacts the static contact 601, the elastic sheet 7 is electrically conducted with the insertion piece 6.

[0062] In some embodiments, such as Figures 3 to 5 As shown, the electromagnet assembly 5 further includes a release bracket 52 fixed in the support 11 of the housing 1. The release pull rod 51 is slidably installed in the release bracket 52 in the horizontal direction. A release spring 53 is installed between the release bracket 52 and the release pull rod 51, and the release spring 53 always makes the release pull rod 51 tend to move towards the lifting slider 2.

[0063] In some embodiments, such as Figure 3 and Figure 4As shown, the housing 1 further includes an upper cover 12 and a lower cover 13 that are fixedly connected to each other. The support 11 is fixed to the lower cover 13. A PCB board 8 is installed at the upper end of the support 11. The PCB board 8 is provided with a perforation through which the reset button 3 passes. A magnetic ring assembly 14 is installed on one side of the support 11. The magnetic ring assembly 14 is a prior art and will not be described in detail in this embodiment. The magnetic ring assembly 14 is connected to a cable 15. A test button 9 is liftably installed on the upper cover 12. A test button spring 91 is installed between the test button 9 and the PCB board 8. A light guide column 10 is installed between the test button 9 and the reset button 3. The light guide column corresponds to the lamp beads on the PCB board 8, facilitating the observation of the on / off state of the electrical connector.

[0064] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0065] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A leakage protection electric plug, characterized in that: include: The housing (1) has two inserting pieces (6) arranged at intervals at its lower end, and spring pieces (7) corresponding to the inserting pieces (6) are symmetrically installed inside the housing; A lifting slider (2) is installed in the housing (1) in a lifting manner and is placed against the spring sheet (7) to push the spring sheet (7) to make it contact with the plug sheet (6) to achieve electrical conduction; A reset button (3) is installed on the housing (1) in a liftable manner, and a clamping head (301) is provided at one end of the reset button (3) which is placed inside the lifting slider (2); A trip card (4) is slidably mounted on the lifting slider (2) in a horizontal direction, and one end of the trip card (4) inserted into the lifting slider (2) is provided with a card slot (401) that can be engaged with the card head (301); when leakage protection is performed, the trip card (4) slides in a horizontal direction, the card slot (401) is disengaged from the card head (301), the lifting slider (2) descends, and then the spring piece (7) is disengaged from the insert piece (6).

2. The leakage protection plug according to claim 1, characterized in that: The release card (4) comprises a horizontally arranged plug-in wall (402), plug-in boards (403) are symmetrically and spaced apart on the plug-in wall (402), and a slot (201) adapted to the plug-in board (403) is arranged on the lifting slide block (2); a card slot (401) with an outer opening is formed between the two plug-in boards (403), and a baffle (404) capable of abutting against the card head (301) is arranged on the inner side of the card slot (401).

3. The leakage protection plug according to claim 2, characterized in that: The release card (4) further comprises a connecting wall (405) disposed outside the lifting slider (2), wherein the connecting wall (405) and the plug-in wall (402) are arranged vertically; limiting plates (406) are symmetrically and spaced apart on the connecting wall (405), and a sliding groove (407) with an open top is formed between the two limiting plates (406).

4. The leakage protection plug according to claim 3, characterized in that: It also includes an electromagnet assembly (5) installed on one side of the lifting slider (2), the electromagnet assembly (5) includes a tripping rod (51) that can slide in a horizontal direction, one end of the tripping rod (51) is drivingly connected to the tripping card (4); the end of the tripping rod (51) facing the tripping card (4) is provided with a first contraction portion (511), and the first contraction portion (511) is placed in the slide groove (407).

5. The leakage protection plug according to claim 2, characterized in that: The upper part of the clamping head (301) is provided with a second contraction portion (302), the upper end of the second contraction portion (302) is provided with a first inclined push surface (303), and the lower side of the clamping head (301) is provided with a second inclined push surface (304); when the reset button (3) is pressed, the first inclined push surface (303) causes the clamping slot (401) to be separated from the clamping head (301), and the lifting slide block (2) is lowered; when the reset button (3) is pressed again, the second inclined push surface (304) causes the clamping slot (401) to be re-engaged with the clamping head (301), and the lifting slide block (2) is raised.

6. The leakage protection plug according to claim 1, characterized in that: A reset button spring (31) is installed between the reset button (3) and the lifting slider (2); the reset button spring (31) is sleeved on the reset button (3); the reset button spring (31) always makes the lifting slider (2) tend to move downward; when leakage protection is performed, the lifting slider (2) descends under the elastic force of the reset button spring (31) and the spring sheet (7).

7. The leakage protection plug according to claim 1, characterized in that: The shell (1) comprises a support (11), the lifting slider (2) can be lifted and installed in the support (11), and two spring sheets (7) are symmetrically arranged on both sides of the support (11); push rods (202) are symmetrically arranged at both ends of the lifting slider (2), and the push rods (202) extend to the outside of the support (11) and abut against the lower end of the spring sheet (7); a reinforcing rib (203) is arranged between the push rod (202) and the lifting slider (2), and a limiting flange (204) is arranged at the outer end of the push rod (202), and a limiting groove (205) adapted to the spring sheet (7) is formed between the limiting flange (204) and the reinforcing rib (203).

8. The leakage protection plug according to claim 7, characterized in that: A static contact (601) is installed at one end of the plug (6) connected to the support (11), and a moving contact (701) corresponding to the static contact (601) is installed on the spring sheet (7); when the moving contact (701) contacts the static contact (601), the spring sheet (7) and the plug (6) are electrically conductive.

9. The leakage protection plug according to claim 4, characterized in that: The electromagnet assembly (5) further comprises a tripping bracket (52) fixed in the support (11) of the housing (1); the tripping rod (51) is slidably installed in the tripping bracket (52) along a horizontal direction; a tripping spring (53) is installed between the tripping bracket (52) and the tripping rod (51); the tripping spring (53) always makes the tripping rod (51) tend to move toward the lifting slider (2).

10. The leakage protection plug according to claim 7, characterized in that: The housing (1) further comprises an upper cover (12) and a lower cover (13) fixed to each other, the support (11) being fixed to the lower cover (13), and a PCB board (8) being mounted on the upper end of the support (11); a magnetic ring assembly (14) being mounted on one side of the support (11), and a cable (15) being connected to the magnetic ring assembly (14); a test button (9) being mounted on the upper cover (12) in a liftable manner, and a test button spring (91) being mounted between the test button (9) and the PCB board (8); and a light guide column (10) being mounted between the test button (9) and the reset button (3).

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