A maintenance type residual current operated protective device

Abstract

The present invention discloses a maintenance type leakage protector, which relates to the technical field of leakage protectors and includes: a base, an upper cover plate, and a leakage protection device. The leakage protection device includes a reset button, a reset block, an electromagnetic driving device, and a spring piece; a power connection terminal electrically connectable to the spring piece is further provided on the base; a first reset spring is provided at the bottom of the reset button; the reset button passes through the upper cover plate and is inserted into the reset block, and the reset button can drive the reset block to move synchronously through a snap piece. Pressing down the reset button can cause the reset block to drive the spring piece to move downward and separate from the power connection terminal to cut off the power supply, and the reset button can be reset and move upward under the action of the first reset spring, which can cause the reset block to drive the spring piece to move upward and contact the power connection terminal to energize; the present invention maintains the closed state of the leakage protector by continuously supplying power to the electromagnetic driving device to suck and engage. When the leakage protector encounters power interruption, poor contact, or phase loss, the leakage protector actively separates and cuts off the power supply to eliminate potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage protectors, and in particular to a maintaining type leakage protector. Background Art

[0002] When a leakage fault occurs in a device or personal electric shock with fatal danger needs to be protected, a leakage protector can timely disconnect the main circuit, so it has been widely used; the application technology of leakage protectors is very mature. Classified by protection principle, there are voltage type and current type. Classified by mechanical structure, there are self-locking type and attracting type, and the commonly used leakage protectors are mainly of the mechanical self-locking structure type of current or voltage. The biggest feature of the mechanical self-locking structure is that when the power supply of the leakage protector in operation is interrupted, the power supply circuit is short of phase, or the line contact is poor, the mechanical self-locking structure of the leakage protector in the closed state cannot actively disconnect the closed contacts. At this time, if there is an abnormal phase loss in the power supply circuit, the ground wire is abnormally charged or leaked, the leakage protector will lose its protection function, resulting in safety accidents.

[0003] In view of the above problems, in the present invention, a self-releasing structure is designed, which adopts a coil continuous power supply suction and release mechanism. When there is a power interruption, poor contact, or phase loss, the suction and holding circuit of this structure loses voltage and cannot generate magnetic force to attract the self-releasing mechanism, resulting in the disconnection of the release circuit and the disconnection of the closed contacts, thus forming an active protection and eliminating potential safety hazards. Summary of the Invention

[0004] I. Technical Problems to be Solved

[0005] Aiming at the above-mentioned defects existing in the prior art, the present invention particularly provides a maintaining type leakage protector, which solves the problem of the complex structure existing in the existing leakage protectors, and also solves the problem that the leakage protector can only open the circuit when it is powered on in the existing leakage protectors.

[0006] II. Technical Solutions

[0007] To solve the above technical problems, the present invention provides a maintaining type leakage protector, including: a base, an upper cover plate, and a leakage protection device. The leakage protection device includes a reset button, a reset block, an electromagnetic driving device, and a spring piece; a power connection terminal electrically connectable to the spring piece is further provided on the base.

[0008] The reset block is movably installed on the upper part of the base. An extending end that can abut against the spring piece is provided on the reset block; the electromagnetic driving device is arranged on one side of the upper part of the base. The electromagnetic driving device includes a driving iron core and a buckle piece. The driving iron core extends out of the electromagnetic driving device. The driving iron core is movably clamped with the buckle piece. The electromagnetic driving device can drive the driving iron core to move so as to drive the buckle piece to move. A buckle groove for the buckle piece to insert is provided on the reset block.

[0009] A first reset spring is provided at the bottom of the reset button. The reset button passes through the upper cover plate and is inserted into the reset stopper, and the reset button can drive the reset stopper to move synchronously through the snap piece. Pressing down the reset button can cause the reset stopper to drive the elastic piece to move downward and separate from the power connection terminal to cut off the power. When the reset button resets and moves upward under the action of the first reset spring, the reset stopper can drive the elastic piece to move upward and contact the power connection terminal to energize;

[0010] The electromagnetic drive device in a continuous power-on state can continuously tighten the snap piece by the drive iron core, and make the snap piece continuously engage with the reset button. The reset button can keep the elastic piece in contact with the power connection terminal in an energized state through the reset stopper.

[0011] Among them, after the electromagnetic drive device loses power, the drive iron core no longer tightens the snap piece, the snap piece disengages from the engagement state with the reset button, and the elastic piece separates from the power connection terminal under the action of its own elastic force to cut off the power.

[0012] Among them, a bayonet that is engaged and matched with the snap piece is provided on the reset button, and an upper engagement surface and a release lower inclined surface are provided on the bayonet.

[0013] Among them, the snap piece is a bent metal piece. One end of the snap piece is provided with a U-shaped opening, and the other end of the snap piece is provided with a button opening. The U-shaped opening is used to engage with the drive iron core, and the button opening can be used for the reset button to pass through, and one edge of the button opening can be engaged and matched with the bayonet.

[0014] Among them, after the electromagnetic drive device loses power, the drive iron core no longer tightens the snap piece, and the reset button moves upward under the action of the first reset spring. During the upward movement of the reset button, the snap piece slides out along the release lower inclined surface of the reset button and disengages from the engagement state with the reset button.

[0015] Among them, the power connection terminal is a pin structure, including a neutral pin, a live pin and a ground pin. The elastic piece includes a neutral elastic piece and a live elastic piece. The neutral pin corresponds to the position of the neutral elastic piece, the live pin corresponds to the position of the live elastic piece, and the ground pin is directly connected to the ground wire; there are two extension ends, and the two extension ends are located on both sides of the reset stopper and are arranged below the neutral elastic piece and the live elastic piece, so that the neutral elastic piece and the live elastic piece can automatically move downward under the action of their own elastic forces.

[0016] Among them, the power connection terminal is a pin structure, including a neutral pin, a live pin, and a ground pin. The elastic pieces include a neutral elastic piece, a live elastic piece, and a ground elastic piece. The neutral pin corresponds to the neutral elastic piece in position, the live pin corresponds to the live elastic piece in position, and the ground pin corresponds to the ground elastic piece in position. There are three protruding ends. Two protruding ends are located on both sides of the reset block and are arranged below the neutral elastic piece and the live elastic piece, and both the neutral elastic piece and the live elastic piece can automatically move downward under their own elastic forces. The third protruding end is located at the bottom of the reset block and is arranged on the top of the ground elastic piece to control the downward movement of the ground elastic piece, and the ground elastic piece can automatically move upward under its own elastic force.

[0017] Among them, the leakage protection device further includes a pressing and guiding block, which is snap-fitted on one side of the upper part of the base. The pressing and guiding block is provided with a pressing end for pressing and fixing the pin on the base.

[0018] Among them, a sliding groove is provided at the top of the base, which can allow the reset block to be inserted into the base from top to bottom for installation, and the reset block can move up and down relative to the sliding groove.

[0019] Among them, the pins and the elastic pieces are embedded on the base.

[0020] Among them, a through hole is provided on the protruding end located at the bottom of the reset block, through which the button rod of the reset button can pass. One end of the first reset spring abuts against the base, and the other end of the first reset spring abuts against the bottom of the reset button.

[0021] Among them, a through hole is provided on the protruding end located at the bottom of the reset block and the ground elastic piece, through which the button rod of the reset button can pass. One end of the first reset spring abuts against the base, and the other end of the first reset spring abuts against the bottom of the reset button.

[0022] Among them, a second reset spring is sleeved on the upper part of the reset button. One end of the second reset spring abuts against the upper part of the upper cover plate, and the other end of the second reset spring abuts against the reset button.

[0023] III. Beneficial Effects

[0024] Compared with the prior art, a maintenance-type leakage protector provided by the present invention maintains the closed state of the leakage protector by adopting a method of continuously supplying power to the electromagnetic driving device for suction and snap connection. When the leakage protector encounters power interruption, poor contact, or phase loss, the electromagnetic driving device cannot generate magnetic force due to the loss of voltage, so that the snap connection structure between the bayonet and the snap buckle piece is no longer snapped, and then the reset button and the reset block are in a separated state where they cannot be linked, so that the leakage protector is separated and powered off, forming an active protection and eliminating potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional view of the disconnected state of the leakage protector of the present invention;

[0026] Figure 2 This is a three-dimensional view of the closed state of the leakage protector of the present invention;

[0027] Figure 3 This is an exploded view of the leakage protector of the present invention;

[0028] Figure 4 This is a three-dimensional view of the base of the present invention;

[0029] Figure 5 This is a three-dimensional view of the buckle piece of the present invention;

[0030] Figure 6 This is the structure of the reset button and the electromagnetic drive device part of the present invention Figure 1 ;

[0031] Figure 7 This is the structure of the reset button and the electromagnetic drive device part of the present invention Figure 2 ;

[0032] Figure 8 This is the structure of the reset button and the electromagnetic drive device part of the present invention Figure 3 ;

[0033] Figure 9 This is a three-dimensional view of the reset block of the present invention;

[0034] Figure 10 This is the structure diagram of Embodiment 2 of the reset button, the electromagnetic drive device and the ground wire elastic piece part of the present invention;

[0035] Figure 11 This is the structure diagram of Embodiment 1 of the reset button, the electromagnetic drive device and the ground wire elastic piece part of the present invention;

[0036] Figure 12 This is the structure diagram of Embodiment 3 of the reset button, the electromagnetic drive device and the ground wire elastic piece part of the present invention;

[0037] Figure 13 This is an exploded view of Embodiment 3 of the leakage protector;

[0038] In the figure: 1 is the tripping lower inclined plane; 2 is the base; 3 is the upper cover plate; 4 is the leakage protection device; 5 is the neutral pin; 6 is the live pin; 7 is the ground pin; 8 is the pin; 9 is the elastic piece; 10 is the reset button; 11 is the upper clamping surface; 12 is the reset stop; 13 is the pressing guide block; 14 is the electromagnetic drive device; 15 is the neutral elastic piece; 16 is the live elastic piece; 17 is the ground elastic piece; 18 is the U-shaped opening; 19 is the electrical connection contact; 20 is the bayonet; 21 is the first reset spring; 22 is the button opening; 23 is the driving iron core; 24 is the buckle piece; 25 is the button body; 26 is the buckle groove; 27 is the button rod; 28 is the sliding groove; 29 is the ground elastic piece through hole; 30 is the second reset spring; 31 is the pressing end; 32 is the extending end. Detailed implementation manners

[0039] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0040] Embodiment 1:

[0041] A maintaining type leakage protector according to an embodiment of the present invention, as Figures 1 to 9 shown, includes: a base 2, an upper cover plate 3, and a leakage protection device 4. The leakage protection device 4 includes a reset button 10, a reset stop 12, an electromagnetic drive device 14, and an elastic piece 9; a power connection end 8 electrically connectable to the elastic piece 9 is further provided on the base 2, and the power connection end 8 and the elastic piece 9 are embedded in the base 2. The upper cover plate 3 can either be a partition made of plastic or other materials that only serves to support the following first reset spring 21, or can play the same role by using a circuit board;

[0042] As Figure 3As shown, the leakage protection device 4 further includes a pressing and guiding block 13. The pressing and guiding block 13 is snap-connected to one side of the upper part of the base 2. The pressing and guiding block 13 is positioned and fixed through a corresponding snap groove provided on the base 2. The pressing and guiding block 13 is provided with a pressing end 31 for pressing and fixing the power connection end 8 on the base 2; the reset stop block 12 is movably installed in the middle position of the upper part of the base 2. Specifically, a sliding groove 28 is provided at the top of the base 2, through which the reset stop block 12 can be inserted into the base 2 from top to bottom. The reset stop block 12 can move up and down relative to the sliding groove 28. The reset stop block 12 is provided with an extending end 32 that can abut against the elastic piece 9. Specifically, the contact and separation between the elastic piece 9 and the power connection end 8 can be controlled through the extending end 32; the electromagnetic driving device 14 is arranged on the other side of the upper part of the base 2. The electromagnetic driving device 14 includes a driving iron core 23 and a snap piece 24. The driving iron core 23 extends out of the electromagnetic driving device 14. The driving iron core 23 is movably snap-connected to the snap piece 24. The electromagnetic driving device 14 can drive the driving iron core 23 to move, thereby driving the snap piece 24 to move. The electromagnetic driving device 14 specifically adopts the method of generating magnetic force by energizing an electromagnetic coil. The reset stop block 12 is provided with a snap groove 26 into which the snap piece 24 can be inserted;

[0043] As Figure 1 shown, in this embodiment, the reset button 10 includes a button body 25 and a button rod 27. A first reset spring 21 is provided at the bottom of the button rod 27; one end of the first reset spring 21 can either directly abut against the base 2 or abut against the base 2 through a spring fixing block provided at the end of the first reset spring 21. The other end of the first reset spring 21 abuts against the bottom of the reset button 10. The first reset spring 21 is positioned or limited through corresponding guiding sleeves or guiding columns and other structures; the reset button 10 passes through the upper cover plate 3 and is inserted into the reset stop block 12, and the reset button 10 can drive the reset stop block 12 to move synchronously through the snap piece 22. Specifically, the reset button 10 is provided with a bayonet 20 that is snap-connected to the snap piece 22. The bayonet 20 is provided with an upper snap surface 11 and a release lower inclined surface 1, that is, the bayonet 20 is an opening similar to a "7" shape, and the opening direction of the bayonet 20 faces away from the electromagnetic driving device 14.

[0044] Moreover, the snap piece 22 is a bent metal piece with a bending angle of about 90°. One end of the snap piece 22 is provided with a U-shaped opening 18, and the U-shaped opening 18 is vertically arranged. The other end of the snap piece 22 is provided with a button opening 22, and the button opening 22 is horizontally arranged. The U-shaped opening 18 is used to snap-connect with the driving iron core 23. The button opening 22 can be used for the reset button 10 to pass through, and one edge of the button opening 22 can be snap-connected to the bayonet 20, that is Figure 5 and Figure 7At the position A shown in the figure, it is clamped and matched with the bayonet 20; specifically, a clamping groove that matches the U-shaped opening 18 is provided at the end of the driving iron core 23. That is, when the driving iron core 23 contracts into the electromagnetic driving device 14 under the magnetic force of the electromagnetic driving device 14, that is, the distance that the driving iron core 23 extends outwards becomes shorter. At this time, when the key rod 27 at the bottom of the reset button 10 is in an appropriate position, the bayonet 20 on the key rod 27 is clamped and matched with the buckle piece 22, and under the continuous action of the electromagnetic driving device 14, the bayonet 20 on the key rod 27 and the buckle piece 22 remain in a clamped and matched state.

[0045] During the specific operation of the leakage protector in this embodiment, when the bayonet 20 and the buckle piece 22 are in a clamped and matched state, pressing down the reset button 10 can cause the reset block 12 to drive the elastic piece 9 to move downwards and separate from the power connection end 8 to cut off the power. Or rather, because the reset block 12 moves downwards, the elastic piece 9 moves downwards under the action of its own elastic force, so as to separate from the power connection end 8 to cut off the power; when the reset button 10 is no longer pressed down, the reset button 10 resets and moves upwards under the action of the first reset spring 21, which can cause the reset block 12 to drive the elastic piece 9 to move upwards and contact the power connection end 8 to energize; that is, the electromagnetic driving device 14 in a continuously powered state can continuously pull the buckle piece 22 by the driving iron core 23, and make the buckle piece 22 and the reset button 10 continuously clamped. The reset button 10 can keep the elastic piece 9 in contact with the power connection end 8 in an energized state through the reset block 12.

[0046] When the electromagnetic driving device 14 loses power, the driving iron core 23 no longer pulls the buckle piece 22, and the buckle piece 22 is disengaged from the clamping state with the reset button 10. The elastic piece 9 separates from the power connection end 8 under the action of its own elastic force to cut off the power; specifically, after the electromagnetic driving device 14 loses power, the reset button 10 moves upwards under the action of the first reset spring 21. During the upward movement of the reset button 10, the buckle piece 22 will slide out along the release inclined plane 1 of the reset button 10 and disengage from the clamping state with the reset button 10 due to the loss of the pulling force exerted on it by the driving iron core 23. That is, in this state, the key rod 27 of the reset button 10 is not in a limited state, and the reset button 10 and the reset block 12 are in a separated state where they cannot be linked. At this time, the elastic piece 9 moves downwards under the action of its own elastic force and separates from the power connection end 8 to cut off the power.

[0047] Through the above structural design in this embodiment, by using the method of continuous power supply and suction clamping of the electromagnetic driving device 14, when the leakage protector encounters power interruption, poor contact, or phase loss, the suction clamping structure of the electromagnetic driving device 14 cannot generate magnetic force due to the loss of voltage, so that the clamping structure between the bayonet 20 and the buckle piece 22 is no longer clamped. Furthermore, the reset button 10 and the reset block 12 are in a separated state where they cannot be linked, so that the leakage protector is separated and powered off to form an active protection, eliminating potential safety hazards.

[0048] Such asFigure 3 As shown, in this embodiment, the power connection terminal 8 is a pin structure, including a neutral pin 5, a live pin 6, and a ground pin 7. The elastic piece 9 includes a neutral elastic piece 15 and a live elastic piece 16, without a ground elastic piece. The neutral pin 5 corresponds to the position of the neutral elastic piece 15, the live pin 6 corresponds to the position of the live elastic piece 16, and the ground pin 7 is directly connected to the ground wire or connected to the ground wire through the circuit board; there are two extending ends 32, such as Figure 11 As shown, the two extending ends 32 are located on both sides of the reset block 12 and are arranged below the neutral elastic piece 15 and the live elastic piece 16. The neutral elastic piece 15 and the live elastic piece 16 can automatically move downward under their own elastic force. Corresponding electrical connection contacts 19 are provided on both the power connection terminal 8 and the elastic piece 9, which can be used to ensure the stable and reliable electrical connection; a through hole is provided on the extending end 32 at the bottom of the reset block 12 for the key rod 27 of the reset button 10 to pass through.

[0049] Embodiment 2:

[0050] As Figure 3 shown, compared with Embodiment 1, in this embodiment, the power connection terminal 8 is a pin structure, including a neutral pin 5, a live pin 6, and a ground pin 7. The elastic piece 9 includes a neutral elastic piece 15, a live elastic piece 16, and a ground elastic piece 17. The neutral pin 5 corresponds to the position of the neutral elastic piece 15, the live pin 6 corresponds to the position of the live elastic piece 16, and the ground pin 7 corresponds to the position of the ground elastic piece 17; there are three extending ends 32. Two extending ends 32 are located on both sides of the reset block 12 and are arranged below the neutral elastic piece 15 and the live elastic piece 16. The neutral elastic piece 15 and the live elastic piece 16 can automatically move downward under their own elastic force; the third extending end 32 is located at the bottom of the reset block 12, as Figure 10 shown, and is arranged on the top of the ground elastic piece 17 to control the downward movement of the ground elastic piece 17. The ground elastic piece 17 can automatically move upward under its own elastic force. Corresponding electrical connection contacts 19 are provided on both the power connection terminal 8 and the elastic piece 9, which can be used to ensure the stable and reliable electrical connection.

[0051] As Figure 10 shown, through holes are provided on the extending end 32 at the bottom of the reset block 12 and the ground elastic piece 17 for the key rod 27 of the reset button 10 to pass through. Specifically, a corresponding ground elastic piece through hole 29 is provided on the ground elastic piece 17. One end of the first reset spring 21 abuts against the base 2, the other end of the first reset spring 21 abuts against the bottom of the reset button 10, and the first reset spring 21 is positioned or limited through corresponding structures such as a guide sleeve or a guide post.

[0052] Embodiment 3:

[0053] In this embodiment, compared with the designs of Embodiment 1 and Embodiment 2, as Figure 13As shown, based on Embodiment 1, a second reset spring 30 is sleeved on the upper part of the reset button 10; based on Embodiment 2, as Figure 12 shown, a second reset spring 30 is sleeved on the upper part of the reset button 10. Specifically, one end of the second reset spring 30 abuts against the upper part of the upper cover plate 3, and the other end of the second reset spring 30 abuts against the reset button 10. Specifically, in this embodiment, when the electromagnetic driving device 14 changes from the normal power-on maintenance state to the power-off state, the reset button 10 moves upward under the combined action of the first reset spring 21 and the second reset spring 30. During the upward movement of the reset button 10, the snap piece 22 slides out along the release inclined surface 1 of the reset button 10 and disengages from the engaged state with the reset button 10 due to the loss of the pulling force applied by the driving iron core 23. Therefore, by adopting the technical solution of this embodiment, on the one hand, the reset elastic force acting on the reset button 10 can be increased to ensure that the reset button 10 can move in place when reset is required. At the same time, the first reset spring 21 and the second reset spring 30 can meet the requirement for the spring elastic force while reducing the requirement for the elastic force of a single spring.

[0054] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A maintenance type leakage protector, characterized in that, The maintenance type leakage protector includes: a base (2), an upper cover plate (3), and a leakage protection device (4). The leakage protection device (4) includes a reset button (10), a reset stopper (12), an electromagnetic driving device (14), and a spring piece (9); a power connection terminal (8) electrically connectable to the spring piece (9) is further provided on the base (2). The reset stopper (12) is movably installed on the upper part of the base (2). An extending end (32) that can abut against the spring piece (9) is provided on the reset stopper (12); the electromagnetic driving device (14) is arranged on one side of the upper part of the base (2). The electromagnetic driving device (14) includes a driving iron core (23) and a snap piece (24). The driving iron core (23) extends out of the electromagnetic driving device (14). The driving iron core (23) is movably clamped with the snap piece (24). The electromagnetic driving device (14) can drive the driving iron core (23) to move so as to drive the snap piece (24) to move. A snap groove (26) into which the snap piece (24) can be inserted is provided on the reset stopper (12). A first reset spring (21) is provided at the bottom of the reset button (10). The reset button (10) passes through the upper cover plate (3) and is inserted into the reset stopper (12), and the reset button (10) can drive the reset stopper (12) to move synchronously through the snap piece (24); in a state where the snap piece (24) is clamped with the reset button (10), pressing down the reset button (10) can cause the reset stopper (12) to drive the spring piece (9) to move downward and separate from the power connection terminal (8) to cut off the power. When the reset button (10) is not pressed by an external force, the reset button (10) resets and moves upward under the action of the first reset spring (21), which can cause the reset stopper (12) to drive the spring piece (9) to move upward and contact the power connection terminal (8) to energize. The electromagnetic driving device (14) in a continuous power-on state can continuously pull the driving iron core (23) on the snap piece (24), and make the snap piece (24) continuously clamped with the reset button (10). The reset button (10) can keep the spring piece (9) in contact with the power connection terminal (8) in an energized state through the reset stopper (12). A bayonet (20) that is clamped and matched with the snap piece (24) is provided on the reset button (10). An upper clamping surface (11) and a tripping lower inclined surface (1) are provided on the bayonet (20). The snap piece (24) is a bent metal sheet. A U-shaped opening (18) is provided at one end of the snap piece (24). A button opening (22) is provided at the other end of the snap piece (24). The U-shaped opening (18) is used for clamping with the driving iron core (23). The button opening (22) can be used for the reset button (10) to pass through, and one edge of the button opening (22) can be clamped and matched with the bayonet (20).

2. The maintainable leakage protector according to claim 1, wherein After the electromagnetic driving device (14) loses power, the driving iron core (23) no longer pulls the snap piece (24), and the snap piece (24) is disengaged from the latching state with the reset button (10). The elastic piece (9) separates from the power connection terminal (8) under the action of its own elastic force, and the power is cut off.

3. The maintenance type leakage protector according to claim 1, characterized in that, After the electromagnetic driving device (14) loses power, the driving iron core (23) no longer pulls the snap piece (24), and the reset button (10) moves upward under the action of the first reset spring (21). During the upward movement of the reset button (10), the snap piece (24) slides out along the unlocking inclined surface (1) of the reset button (10) and is disengaged from the latching state with the reset button (10).

4. A maintenance-type leakage protector according to claim 1, characterized in that, The power connection terminal (8) is a pin structure, including a neutral pin (5), a live pin (6), and a ground pin (7). The elastic piece (9) includes a neutral elastic piece (15) and a live elastic piece (16). The neutral pin (5) corresponds to the position of the neutral elastic piece (15), the live pin (6) corresponds to the position of the live elastic piece (16), and the ground pin (7) is directly connected to the ground wire; there are two extending ends (32), and the two extending ends (32) are located on both sides of the reset block (12) and are arranged below the neutral elastic piece (15) and the live elastic piece (16). The neutral elastic piece (15) and the live elastic piece (16) can automatically displace downward under the action of their own elastic forces.

5. A maintenance type leakage protector according to claim 1, characterized in that, The power connection terminal (8) is a pin structure, including a neutral pin (5), a live pin (6), and a ground pin (7). The elastic piece (9) includes a neutral elastic piece (15), a live elastic piece (16), and a ground elastic piece (17). The neutral pin (5) corresponds to the position of the neutral elastic piece (15), the live pin (6) corresponds to the position of the live elastic piece (16), and the ground pin (7) corresponds to the position of the ground elastic piece (17); there are three extending ends (32), two of the extending ends (32) are located on both sides of the reset block (12) and are arranged below the neutral elastic piece (15) and the live elastic piece (16). The neutral elastic piece (15) and the live elastic piece (16) can automatically displace downward under the action of their own elastic forces; the third extending end (32) is located at the bottom of the reset block (12) and is arranged at the top of the ground elastic piece (17) to control the downward movement of the ground elastic piece (17), and the ground elastic piece (17) can automatically displace upward under the action of its own elastic force.

6. The maintainable leakage protector according to claim 1, characterized in that, The leakage protection device (4) further includes a pressing guide block (13), and the pressing guide block (13) is snap-connected to one side of the upper part of the base (2). The pressing guide block (13) is provided with a pressing end (31) for pressing and fixing the power connection terminal (8) on the base (2).

7. A maintenance type leakage protector as claimed in claim 1, wherein, The top of the base (2) is provided with a sliding groove (28) that allows the reset block (12) to be inserted into the base (2) from top to bottom, and the reset block (12) can move up and down relative to the sliding groove (28).

8. The maintainable leakage protector according to claim 1, characterized in that, The power connection terminal (8) and the elastic piece (9) are embedded in the base (2).

9. The sustained leakage protector according to claim 4, characterized in that, An extension end (32) located at the bottom of the reset stopper (12) is provided with a through hole through which a key rod (27) of the reset key (10) can pass. One end of the first reset spring (21) abuts against the base (2), and the other end of the first reset spring (21) abuts against the bottom of the reset key (10).

10. A maintenance-type leakage protector according to claim 5, characterized in that, An extension end (32) located at the bottom of the reset stopper (12) and a ground wire elastic piece (17) are provided with a through hole through which a key rod (27) of the reset key (10) can pass. One end of the first reset spring (21) abuts against the base (2), and the other end of the first reset spring (21) abuts against the bottom of the reset key (10).

11. A maintenance type leakage protector according to claim 1, characterized in that, A second reset spring (30) is sleeved on the upper part of the reset key (10). One end of the second reset spring (30) abuts against the upper part of the upper cover plate (3), and the other end of the second reset spring (30) abuts against the reset key (10).

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