Reset locking structure and electric leakage protection device

Abstract

The application provides a reset locking structure and a leakage protection device, and belongs to the technical field of electric appliance switches. The reset locking structure comprises a base, the base is connected with an air switch, and a reset button is movably arranged on the base in an elastic manner. The reset locking structure further comprises a linkage rod and a tripping connecting rod. When the reset button is in a reset state, the linkage rod is matched with the reset button and located at an initial position, and the tripping connecting rod can rotate without interference, so that a handle can be operated for power-on or power-off. When the reset button is in a pop-up state, the linkage rod is matched with the reset button and located at a locking position. In the locking position, the linkage rod is locked by the reset button and cannot rotate towards the initial position. The tripping connecting rod is constrained at a power-off position and cannot rotate towards a power-on position, thereby blocking the handle from performing power-on operation. The reset locking structure and the leakage protection device can limit the handle to perform power-on operation in a leakage state, thereby improving safety performance.

Description

Technical Field

[0001] This invention relates to the field of electrical switch technology, specifically to a reset locking structure and a leakage current protection device using the reset locking structure. Background Technology

[0002] A residual current circuit breaker (RCCB) is an electrical safety device primarily used to quickly cut off the power supply and enter the open state in the event of electric shock or leakage, thereby ensuring personal safety and preventing electric shock accidents.

[0003] In practice, staff will reconnect the power after troubleshooting and resolving the problem. However, if some non-professionals are unaware of the problem during the troubleshooting process or if the problem is not thoroughly investigated before reconnecting the power, it can damage the circuit and, in severe cases, endanger personal safety. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the circuit breaker in the prior art is prone to closing under leakage current, which may cause safety hazards, and thus provide a reset locking structure.

[0005] To solve the above-mentioned technical problems, the present invention provides a reset locking structure, comprising:

[0006] Base, suitable for connection with air switch;

[0007] A reset button is flexibly and movable on the base;

[0008] A linkage rod is rotatably connected to the base. The linkage rod cooperates with the reset button for rotational locking. When the reset button is in the reset state, the linkage rod and the reset button are in the initial position. When the reset button is in the pop-up state, the linkage rod and the reset button are in the locked position. In this locked position, the linkage rod is locked by the reset button and cannot rotate toward the initial position.

[0009] A tripping linkage is rotatably connected to the base coaxially with the linkage rod. The tripping linkage is adapted to connect with a handle on the air switch used for energizing and de-energizing operations to achieve linkage between the tripping linkage and the handle. The tripping linkage and the linkage rod cooperate to provide rotational constraint. When the linkage rod is in the initial position, the tripping linkage can rotate without interference, allowing the handle to perform energizing or de-energizing operations. When the linkage rod jumps from the initial position to the locked position, the tripping linkage is driven by the linkage rod to jump from the energized position to the de-energized position. When the linkage rod is in the locked position, the tripping linkage is constrained in the de-energized position and cannot rotate towards the energized position, thereby preventing the handle from performing energizing operations.

[0010] Optionally, the reset button has a cavity for accommodating the first elastic element, and a limiting block is provided on the reset button. The base is provided with a mating block for abutting the limiting block after movement.

[0011] Optionally, the reset button has an abutment end for limiting the rotation of the linkage rod when the base is popped out.

[0012] Optionally, the linkage rod has a first limiting end for abutting the abutting end, and the abutting end of the reset button is provided with a guide surface. The root of the guide surface has a horizontal blocking surface. In the absence of leakage, when the reset button is reset, the first limiting end of the linkage rod moves along the guide surface of the reset button to the horizontal blocking surface, thereby constraining the reset button within the base.

[0013] Optionally, the linkage rod has a second limiting end for cooperating with the release link, and the free end of the release link has an overlapping surface for overlapping with the second limiting end.

[0014] Optionally, a second elastic element is connected between the linkage rod and the base, and a locking plate is provided on the linkage rod for engaging the second elastic element.

[0015] Optionally, a receiving space is provided between the card plate and the second limiting end. In the absence of leakage, the release linkage swings within the receiving space due to the linkage of the power-on and power-off action of the handle.

[0016] Optionally, the base is provided with a stop block for limiting the rotation path of the release link, and the release link is provided with an abutment surface that cooperates with the stop block.

[0017] Optionally, it also includes a drive shaft, one end of which is connected to the release linkage and the other end is fixed to the handle. A cavity is provided on the base for passing through the drive shaft and accommodating the swing of the drive shaft.

[0018] The technical solution of this invention has the following advantages:

[0019] 1. The reset locking structure provided by the present invention includes a base, a reset button elastically disposed on the base, and a linkage rod and a tripping link coaxially rotatably disposed within the base. When the reset button is in the reset state, the linkage rod and the reset button are engaged in the initial position, and the tripping link can rotate without interference, so that the handle can be powered on or off. When the reset button is in the pop-up state, the linkage rod and the reset button are engaged in the locked position. In the locked position, the linkage rod is locked by the reset button and cannot rotate toward the initial position, and the tripping link is constrained in the off position and cannot rotate toward the powered position, thereby preventing the handle from being powered on.

[0020] With the above settings, the tripping linkage and the handle are linked together, so that the tripping linkage can be limited to the linkage rod and cannot be rotated in the event of leakage, thus preventing the handle from continuing to perform the closing and power-on operation. This avoids the possibility of non-professionals accidentally closing the circuit in the event of leakage, which could lead to short circuits or other safety accidents. It also prevents the possibility of safety hazards caused by staff failing to properly inspect leakage problems and closing the circuit.

[0021] 2. The reset locking structure provided by the present invention has a cavity inside the reset button to accommodate the first elastic element, and a limiting block is provided on the reset button, and a mating block is provided on the base to abut against the limiting block after movement.

[0022] This design allows the reset button to extend outward elastically, and a limit block can be used to prevent the reset button from popping out excessively.

[0023] 3. The reset locking structure provided by the present invention has a first limiting end on the linkage rod that abuts against the abutting end, and a guide surface on the abutting end of the reset button. The root of the guide surface has a horizontal blocking surface. In the absence of leakage current, when the reset button is reset, the first limiting end of the linkage rod moves along the guide surface of the reset button to the horizontal blocking surface, thereby constraining the reset button within the base.

[0024] The guide surface facilitates the movement of the first limit end of the linkage rod during the pressing of the reset button, while the horizontal blocking surface further enhances the limiting constraint effect between the first limit end and the reset button, preventing the first limit end from detaching from the reset button. The structure is simple and easy to assemble.

[0025] 4. The reset locking structure provided by this invention has a second elastic element connected between the linkage rod and the base, and a locking plate on the linkage rod for engaging the second elastic element. This configuration allows the linkage rod to be influenced by elasticity, thereby facilitating its movement towards the horizontal blocking surface, improving the overall structural response, and enhancing the stability of the linkage rod's movement.

[0026] 5. The reset locking structure provided by this invention has a receiving space between the locking plate and the second limiting end. In the absence of leakage current, the tripping linkage swings within the receiving space due to the linkage of the handle's power-on and power-off action. The tripping linkage is confined within the receiving space, which further prevents its swing amplitude from being too large and affecting the structural stability.

[0027] 6. The reset locking structure provided by the present invention connects the handle and the release linkage shaft, and provides a cavity on the base for the shaft to swing. With this configuration, the handle and the release linkage have better linkage consistency and transmission efficiency.

[0028] 7. The reset locking structure provided by the present invention has a base with a stop block for limiting the rotation path of the release link, and a contact surface that cooperates with the stop block is constructed on the release link.

[0029] The set stop block and stop surface can further limit the rotation path of the release linkage, preventing excessive deviation due to the rotation of the linkage rod, which would affect the normal working state.

[0030] Furthermore, the present invention also provides a leakage current protection device, which includes an air switch and a reset locking structure as described above. The air switch has a handle for performing energizing and de-energizing operations, and the handle is connected to the tripping linkage of the reset locking structure. This leakage current protection device has the same beneficial effects as the aforementioned reset locking structure, and will not be described in detail here. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is an assembly diagram of the leakage current protection device described in this invention;

[0033] Figure 2 This is a schematic diagram of the internal structure of the reset locking structure and air switch assembly described in this invention;

[0034] Figure 3 This is a schematic diagram of the structure of the base described in Embodiment 1 of the present invention;

[0035] Figure 4 This is a partial structural diagram of the reset and locking structure described in Embodiment 1 of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the reset button according to Embodiment 1 of the present invention;

[0037] Figure 6 This is a schematic diagram of the linkage rod described in Embodiment 1 of the present invention;

[0038] Figure 7 This is a schematic diagram of the internal mechanism of the reset and locking structure of the present invention when leakage current is detected;

[0039] Figure 8 This is a schematic diagram of the internal mechanism of the reset and locking structure of the present invention in the absence of leakage current.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Base; 2. Reset button; 3. Linkage rod; 4. Tripping linkage rod; 5. Handle; 6. Coil trip unit; 7. Control panel; 8. Air switch;

[0042] 101. Abutment block; 201. Limiting block; 202. Abutment end; 203. Guide surface; 204. Horizontal blocking surface; 205. Slot;

[0043] 301, First limiting end; 302, Second limiting end; 303, Clamping plate; 304, Second elastic element; 305, Protrusion; 401, Drive shaft. Detailed Implementation

[0044] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] Example 1

[0049] This embodiment relates to a reset locking structure, including a base, a reset button elastically disposed on the base, and a linkage rod and a release linkage located within the base.

[0050] The linkage rod is rotatably connected to the base. The linkage rod cooperates with the reset button for rotational locking. When the reset button is in the reset state, the linkage rod and the reset button are in the initial position. When the reset button is in the pop-up state, the linkage rod and the reset button are in the locked position. In the locked position, the linkage rod is locked by the reset button and cannot rotate toward the initial position.

[0051] The tripping link and the linkage are coaxially rotatably connected to the base. The tripping link is linked to the operation of the handle, and the tripping link and the linkage work together to constrain rotation. When the linkage is in the initial position, the tripping link can rotate without interference, allowing the handle to perform energizing or de-energizing operations. When the linkage jumps from the initial position to the locked position, the tripping link is driven by the linkage to jump from the energized position to the de-energized position. When the linkage is in the locked position, the tripping link is constrained in the de-energized position and cannot rotate towards the energized position, thus preventing the handle from performing energizing operations.

[0052] Based on the above overall structural design, a specific implementation of the reset locking structure described in this embodiment is as follows: Figure 1 As shown, the base 1 can be integrally injection molded, and its housing is fitted into one side of the air switch and fixed to the air switch by screws or other fasteners. The linkage rod 3 and the tripping linkage 4 are both assembled in the space of the base 1 near the reset button 2. In addition, a test button should be provided on the base to detect whether the reset button 2 is in a normal working state. The air switch should also be provided with a handle for power-on and power-off operations. The air switch can adopt existing mature technology, which will not be specifically described in this embodiment.

[0053] Combination Figures 1 to 4 As shown, an opening for the reset button 2 is provided on the base 1. The reset button 2 is telescopically disposed within the opening of the base 1. The reset button 2 has a cavity for accommodating the first elastic element, and a limiting block 201 is provided on either side of the bottom of the reset button 2. Correspondingly, a mounting block for mounting the first elastic element and a mating block for abutting against the limiting block 201 after movement are provided on the base 1. The first elastic element is installed in the cavity via the mounting block, and the elastic movement of the reset button 2 is limited by the limiting block 201 and the mating block. With this configuration, the reset button 2 has a good elastic movement state, which is beneficial for quickly responding to the rotation of the linkage rod 3 in the event of leakage. Here, the first elastic element is preferably a compression spring, but the mounting method of the first elastic element and the mating structure of the limiting block 201 and the mating block can also adopt other forms.

[0054] Furthermore, the reset button 2 has an abutment end 202 that limits the rotation of the linkage rod 3 when the base 1 is in the pop-out state. In a preferred embodiment, this abutment end 202 faces the end of the linkage rod 3 used for limiting rotation and has an inclined chamfer, thereby facilitating better stability after contact with the linkage rod 3 and preventing relative slippage. An inclined guide surface 203 is used for transition between the reset button 2 and the abutment end 202, and a horizontal blocking surface 204 is constructed at the base of the guide surface 203 and the junction of the reset button 2 body. This guide surface 203 facilitates the sliding of the linkage rod 3 during the pressing of the reset button 2, ultimately securing it to the horizontal blocking surface 204 for a stable locking effect.

[0055] like Figures 4 to 6 As shown, a pivot shaft is provided on the base 1, and the linkage rod 3 passes through the pivot shaft to form a rotation effect. The linkage rod 3 is generally in the shape of a right triangle and has a first limiting end 301 for abutting the abutting end 202. The first limiting end 301 protrudes outward relative to the linkage rod 3 as a whole, and part of its end is set at a certain angle relative to the horizontal plane, so that it can easily abut against the chamfer on the abutting end 202 to form a limiting position. At the same time, the setting of this end can also facilitate the sliding of the guide surface 203 to the horizontal blocking surface 204 during the process of pressing the reset button 2. The limiting engagement state of the first limiting end 301 and the horizontal blocking surface 204 is the initial position of the linkage rod 3 and the reset button 2. This setting can reduce component interference and enhance the smoothness of the entire movement process.

[0056] To further enhance the cooperation between the reset button 2 and the linkage rod 3 in the initial state and prevent the linkage rod 3 from disengaging from the reset button 2 along the guide surface 203, a slot 205 is provided on the inner side of the main body of the reset button 2. The slot 205 is provided corresponding to the extension section of the first limiting end 301 on the horizontal blocking surface 204. When the first limiting end 301 abuts against the reset button 2, the end of the first limiting end 301 can extend into the slot 205, forming a cooperating locking effect with the reset button 2.

[0057] In addition, the other end of the linkage rod 3 relative to the first limiting end 301 has a second limiting end 302 for cooperating with the release link 4. The second limiting end 302 protrudes outward relative to the linkage rod 3 as a whole, and a stepped protrusion 305 is formed on the second limiting end 302. The protrusion 305 can prevent interference between the release link 4 and the unrelated parts of the second limiting end 302, thereby further facilitating the movement of the release link 4 after it abuts against the corresponding end of the release link 4. Its overall structure is simple, easy to assemble, and has a good movement effect.

[0058] In this embodiment, a second elastic element 304 is also connected between the linkage rod 3 and the base 1, and the specific structure is as follows: Figure 4As shown, the aforementioned second elastic element 304 is preferably a torsion spring. A locking plate 303 is constructed on the linkage plate between the first limiting end 301 and the second limiting end 302. Correspondingly, a fixing block is provided on the base 1. The middle part of the torsion spring passes through the pivot shaft, and its two ends respectively overlap the corresponding end faces of the locking plate 303 and the fixing block, thereby forming the elastic movement of the linkage plate. With this configuration, the linkage rod 3 is set to be affected by the elastic action, which is conducive to the further movement tendency of the linkage rod 3 towards the horizontal blocking surface 204, which is conducive to the rapid response of the overall structure and improves the movement stability of the linkage rod 3.

[0059] like Figures 2 to 4 As shown, the reset locking structure in this embodiment also includes a drive shaft 401. The tripping link 4 and the linkage rod 3 are coaxially mounted on the base 1 and have two protruding ends. One end of the drive shaft 401 is connected to the end of the tripping link 4 away from the first limiting end 301 of the linkage rod 3, and the other end is fixedly connected to the handle 5. The end of the tripping link 4 near the first limiting end 301 has a downwardly oriented overlapping surface, which is used to overlap with the protrusion 305 of the second limiting end 302 to form a mating effect. The other end of the aforementioned drive shaft 401 is connected to the handle 5 located inside the air switch through an opening on the base and is configured to be synchronously linked by the closing and opening operations of the handle 5, causing the tripping link 4 to perform a reciprocating swinging motion. In order to realize the swinging motion of the tripping link 4 under the action of the drive shaft 401, a cavity with a certain arc shape is also provided on the base 1 for passing through the shaft 401 and accommodating the swinging motion of the drive shaft 401.

[0060] Here, as a preferred embodiment, a receiving space is provided between the locking plate 303 and the second limiting end 302. In the absence of leakage, the release linkage 4 swings within this receiving space due to the linkage of the handle 5's on / off power action. This arrangement prevents the release linkage 4 from being subjected to excessive impact from the pushing action of the linkage rod 3, thus enhancing the overall stability of the structure. Further, as... Figure 2 As shown, a stop block 101 is provided on the cover plate of the base 1 corresponding to the air switch to limit the rotation path of the tripping link 4, and an abutment surface that cooperates with the stop block 101 is constructed on the tripping link 4. The stop block 101 and the abutment surface can further ensure that the rotation amplitude of the tripping link 4 is controllable, thereby improving the rotational stability of the tripping link 4.

[0061] Combination Figure 7 and Figure 8Thus, in the operation of the reset locking structure of this embodiment, the bottom of the second limiting end 302 of the linkage rod 3 is pushed upward by the circuit breaking actuator, so that the linkage rod 3 rotates counterclockwise along the pivot axis. During this process, the first limiting end 301 of the linkage rod 3 disengages from the horizontal blocking surface 204 and slides along the guide surface 203. The reset button 2 disengages from the limiting end 301 and pops out of the base 1 due to the elastic action of the compression spring, and finally forms a locked position where the first limiting end 301 and the abutment end 202 abut. The release link 4 rotates synchronously due to the push of the second limiting end 302. Due to the transmission of the transmission shaft 401, the handle 5 is driven to the de-energized position. In the locked position, the release link 4 is constrained by the top plate and the second limiting end 302 and cannot rotate back to the initial position, thereby preventing the handle 5 from performing the energized operation.

[0062] In this embodiment, the circuit breaker mechanism includes a control board 7 disposed in the base 1 and a coil trip unit 6 electrically connected to the control board 7. When leakage current is detected, the control board 7 receives the leakage current signal and sends an electrical signal to the coil trip unit 6, thereby realizing the upward pushing action of the coil trip unit 6, which in turn pushes the linkage rod 3 to drive the trip linkage rod 4 to rotate. Here, the connection and installation method of the control board 7 and the coil trip unit 6 can adopt existing mature technology, which will not be described in this embodiment.

[0063] When the reset button 2 is pressed down, the first elastic element is compressed, and the linkage rod 3 has a clockwise rotation tendency due to the elastic action of the torsion spring. This causes the first limiting end 301 to slide along the guide surface 203 to the horizontal blocking surface 204, thus forming a limiting state for the linkage rod 3 and the reset button 2. During this process, the second limiting end 302 moves downward relative to each other, increasing the accommodating space of the card plate 303 and the second limiting end 302, and giving the tripping linkage 4 a larger swing range, so that the handle 5 can be smoothly powered on.

[0064] With the above settings, the tripping linkage 4 and the handle 5 are linked together, so that the tripping linkage 4 can be limited to the linkage rod 3 and cannot be rotated in the case of leakage, thus preventing the handle 5 from continuing to perform the closing and power-on operation. This avoids the circuit short circuit or other safety accidents caused by non-professionals accidentally closing the circuit in the case of leakage, and also prevents the safety hazards caused by the staff not properly checking the leakage problem and closing the circuit.

[0065] Example 2

[0066] This embodiment specifically relates to a leakage current protection device, such as... Figure 1 and Figure 2As shown, the leakage current protection device includes an air switch and a reset locking structure as described in Embodiment 1. The air switch contains a leakage current detection device, which is electrically connected to the control board 7. When a leakage current is detected, the detection device sends a leakage current signal to the control board 7. Here, the leakage current detection device can be a readily available and mature zero-sequence current transformer; this embodiment is merely an example. Furthermore, the air switch 8 has a handle 5 for energizing and de-energizing operations. The handle 5 is connected to the tripping linkage 4 of the reset locking structure to achieve coordinated operation between the handle 5 and the tripping linkage 4.

[0067] By connecting the handle 5 and the tripping link 4 on the air switch 8 via shaft transmission, the linkage consistency between the handle 5 and the tripping link 4 can be achieved, and the transmission efficiency of the tripping link 4 and the handle 5 can be enhanced. This helps to maintain the handle 5 in the open state under leakage current conditions, thereby improving the safety performance of the leakage current protection device.

[0068] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A reset locking structure, characterized in that, include: Base (1), adapted to be connected to air switch (8); A reset button (2) is flexibly and movable on the base (1); Linkage rod (3) is rotatably connected to the base (1). The linkage rod (3) cooperates with the reset button (2) for rotational locking. When the reset button (2) is in the reset state, the linkage rod (3) cooperates with the reset button (2) to be in the initial position. When the reset button (2) is in the pop-up state, the linkage rod (3) cooperates with the reset button (2) to be in the locked position. In the locked position, the linkage rod (3) is locked by the reset button (2) and cannot rotate toward the initial position. The tripping link (4) is rotatably connected to the base (1) coaxially with the linkage rod (3). The tripping link (4) is adapted to be connected to the handle (5) on the air switch (8) for energizing and de-energizing operations to realize the linkage between the tripping link (4) and the handle (5). The tripping link (4) cooperates with the linkage rod (3) to perform rotational constraint. When the linkage rod (3) is in the initial position, the tripping link (4) can rotate without interference so that the handle (5) can perform energizing or de-energizing operations. When the linkage rod (3) jumps from the initial position to the locked position, the tripping link (4) is driven by the linkage rod (3) to jump from the energized position to the de-energized position. When the linkage rod (3) is in the locked position, the tripping link (4) is constrained in the de-energized position and cannot rotate toward the energized position, thereby blocking the handle (5) from performing energizing operations. The reset button (2) has a cavity for accommodating the first elastic element, and a limiting block (201) is provided on the reset button (2). The base (1) is provided with a mating block for abutting the limiting block (201) after movement. The reset button (2) has an abutment end (202) for limiting the rotation of the linkage rod (3) when the base (1) is popped out. The linkage rod (3) has a first limiting end (301) for abutting against the abutting end (202). The abutting end (202) of the reset button (2) is provided with a guide surface (203). The root of the guide surface (203) has a horizontal blocking surface (204). In the absence of leakage, when the reset button (2) is reset, the first limiting end (301) of the linkage rod (3) moves along the guide surface (203) of the reset button (2) to the horizontal blocking surface (204), thereby constraining the reset button (2) within the base (1). The linkage rod (3) has a second limiting end (302) for cooperating with the release linkage (4), and the free end of the release linkage (4) is provided with an overlapping surface for overlapping with the second limiting end (302); A second elastic element (304) is connected between the linkage rod (3) and the base (1), and a locking plate (303) is provided on the linkage rod (3) for locking the second elastic element (304). A receiving space is provided between the card plate (303) and the second limiting end (302). In the absence of leakage, the release linkage (4) swings within the receiving space due to the linkage of the power-on and power-off action of the handle (5).

2. The reset locking structure according to claim 1, characterized in that, The base (1) is provided with a stop block (101) for limiting the rotation path of the release link (4), and the release link (4) is provided with a contact surface that cooperates with the stop block (101).

3. The reset locking structure according to claim 1, characterized in that, It also includes a drive shaft (401), one end of which is connected to the release linkage (4) and the other end is fixed to the handle (5). A cavity is provided on the base (1) for passing through the drive shaft (401) and accommodating the swing of the drive shaft (401).

4. A leakage current protection device, characterized in that, include: An air switch (8) and a reset locking structure as described in any one of claims 1-3, wherein the air switch (8) has a handle (5) for performing power-on and power-off operations, and the handle (5) is connected to the tripping link (4) of the reset locking structure.

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