Modularized installation structure of electric leakage protection device

Abstract

The utility model discloses a modular installation structure of a leakage protection device, which comprises a shield module, a transmission mechanism, an electromagnetic mechanism and a circuit board, the transmission mechanism is installed in a first installation cavity of the shield module, and the electromagnetic mechanism is installed in a second installation cavity of the shield module. The armature push rod extends and penetrates into the first mounting cavity to be connected with the transmission part, the circuit board is fixed to the shield module through a buckle structure, the transmission mechanism, the electromagnetic mechanism, the mutual inductor module, the circuit board and the driving structure are integrated into a mounting whole through the shield module, redundant structures are reduced through integrated mounting, and the mounting efficiency is improved. Complexity of traditional split type installation is avoided, assembly difficulty is remarkably reduced, assembly efficiency is improved, the electric leakage protection device is suitable for internal layout of the electric leakage protection device with a compact space, through modular integrated design and structural optimization, installation efficiency, operation reliability and maintenance convenience are taken into account, and automatic assembly production of the electric leakage protection device is facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of leakage current protection devices, and specifically to a modular installation structure for leakage current protection devices. Background Technology

[0002] A residual current device (RCD) is an electrical device used for the power interface of household appliances and is one of the most commonly used electrical components in residential electrical design. It is closely related to people's lives. An RCD automatically cuts off the power supply when a leakage current occurs in the circuit, before the leakage current reaches a level that could harm the human body, thus protecting personal safety.

[0003] A residual current device (RCD) plug includes a housing with an inner cavity, a circuit board, a tripping device, a contact system, and pins. The tripping device includes an electromagnetic coil, an iron core, a yoke, an armature, an armature bracket, and a return spring. The contact system includes a moving contact fixed on the armature bracket and a stationary contact disposed within the housing. The circuit board is soldered to the pins, which are connected to the moving contact via a flexible connection. One end of the return spring is connected to the armature, and the other end is connected to the yoke. The armature is fixedly connected to the armature bracket, which is rotatably mounted within the housing with the iron core facing it. When energized, the electromagnetic coil attracts the armature bracket, causing the moving contact to contact the stationary contact under the action of the armature bracket. When the coil is de-energized, the return spring helps to reset the moving contact. Existing RCD plugs have complex assembly structures, numerous assembly steps, and are cumbersome to install, making it difficult to improve assembly efficiency. This hinders automated assembly production and increases production costs. To this end, technicians are currently optimizing the installation structure of the leakage current protection plug to simplify the assembly structure, achieve modular assembly of the product, and improve assembly efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problems of complex assembly structure, many assembly steps, cumbersome installation, difficulty in improving assembly efficiency, and increased production costs of the leakage protection plug in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a modular installation structure for a leakage current protection device, comprising:

[0006] The protective cover module is installed inside the housing and includes a first mounting cavity and a second mounting cavity that are spaced apart.

[0007] The transmission mechanism is installed in the first mounting cavity of the protective cover module, and includes a transmission component rotatably disposed in the first mounting cavity, and two sets of contact assemblies coaxially linked to the transmission component.

[0008] An electromagnetic mechanism is installed in the second mounting cavity of the protective cover module. It includes an armature push rod that moves linearly under the action of electromagnetic force generated by the electromagnetic mechanism. The armature push rod extends into the first mounting cavity and is connected to the transmission component. A return spring sleeved on the armature push rod is provided between the transmission component and the electromagnetic mechanism. When the armature push rod moves, it drives the transmission component to rotate.

[0009] As a preferred embodiment, the protective cover module includes a first cover with a first mounting cavity and a second cover with a second mounting cavity. The transmission mechanism is installed in the first cover, and the electromagnetic mechanism is installed in the second cover. The first cover and the second cover are fixedly connected or integrally connected.

[0010] As a preferred embodiment, the protective cover module further includes a mounting plate connected to one side of the second cover, on which a current transformer module is mounted.

[0011] As a preferred embodiment, the system further includes a circuit board fixed to the top of the protective cover module via a connecting structure. The current transformer module and the electromagnetic mechanism are respectively connected to the circuit board. The circuit board covers the transmission mechanism, the electromagnetic mechanism, and the current transformer module. The connecting structure includes multiple mounting buckles disposed on the side wall of the protective cover module and multiple mounting holes disposed on the circuit board and engaging with the mounting buckles.

[0012] As a preferred embodiment, the transmission component has two rotating shafts extending coaxially at both ends, connecting two sets of contact assemblies. The two side walls of the first cover are provided with two rotating shaft holes that are rotatably connected to the two rotating shafts. Each set of contact assemblies includes a contact support sleeved on the rotating shaft, a movable contact linked to the contact support, and a torsion spring disposed between the contact support and the transmission component. When the transmission component rotates, it compresses the torsion spring to drive the contact support to rotate.

[0013] As a preferred embodiment, the torsion spring is sleeved on the rotating shaft and has two elastic end feet that extend and connect to the transmission member and the contact support member respectively. A limiting gap is formed between the transmission member and the contact support member to accommodate the torsion spring. The contact support member and the transmission member are respectively provided with limiting protrusions that extend into the limiting gap and abut against the two elastic end feet.

[0014] As a preferred embodiment, the electromagnetic mechanism includes a coil structure that is matched and installed in the second mounting cavity, a coil cavity that extends axially along the coil structure, and a yoke disposed at one end of the coil cavity. The armature push rod is movably disposed in the coil cavity and forms an initial gap with the yoke. The distance L1 of the initial gap is greater than the distance L2 required for the yoke to attract the armature push rod by electromagnetic force. A drive structure for driving the armature push rod to move closer to the yoke is provided between the protective cover module and the housing.

[0015] As a preferred embodiment, the length extension direction of the transmission component is perpendicular to the length extension direction of the armature push rod, and the transmission component has a insertion groove in the middle, with one end of the armature push rod extending out of the coil structure connected to the insertion groove.

[0016] As a preferred embodiment, the drive structure includes a drive rod that extends vertically through the circuit board into the first mounting cavity and cooperates with the transmission component, and a compression spring disposed between the drive rod and the protective cover module. The upper end of the drive rod is provided with a button opposite to the circuit board, and the bottom of the button is provided with a set of limiting hooks that slide through the circuit board. The limiting hooks cooperate to hook against the lower side of the circuit board under the force of the compression spring.

[0017] As a preferred embodiment, the lower end of the drive rod is provided with a drive ramp, and the middle part of the transmission component is provided with a guide ramp that cooperates with the drive ramp; the circuit board is provided with a guide hole through which the drive rod can pass, and the inner wall of the cover module facing the guide ramp is provided with a guide groove extending axially along the guide hole; the drive rod passes through the guide hole and the guide groove; the compression spring is sleeved on the drive rod, and its two ends abut against the first cover and the button, respectively.

[0018] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0019] 1. In the modular installation structure of the leakage current protection device provided by this utility model, the transmission mechanism and the electromagnetic mechanism are respectively installed in the first and second mounting cavities of the protective cover module. The advantage of this design is that the electromagnetic mechanism and the transmission mechanism can be pre-assembled into a whole and calibrated (such as magnetic circuit alignment and contact stroke adjustment) within the protective cover module, eliminating performance deviations caused by accumulated errors in traditional step-by-step assembly, ensuring that the protective cover module is "plug and play" after being installed in the housing. Furthermore, the protective cover module can absorb external vibrations or mechanical shocks, providing installation protection for the electromagnetic mechanism and the transmission mechanism, enhancing installation reliability and protection, and facilitating disassembly and maintenance. If the electromagnetic mechanism or the transmission mechanism is damaged, the protective cover module can be directly removed for replacement without disassembling the internal wiring of the plug. This modular design of the leakage current protection device solves the problems of complex assembly, difficult maintenance, and low reliability of traditional leakage current protection devices through functional integration, modular installation, and systematic protection. It achieves modular assembly, reduces assembly complexity, shortens production time, and lowers costs.

[0020] 2. In the modular installation structure of the leakage current protection device provided by this utility model, the transmission mechanism, electromagnetic mechanism, current transformer module, circuit board and drive structure are integrated into a whole through the protective cover module. This integrated installation reduces redundant structure, avoids the complexity of traditional split installation, significantly reduces assembly difficulty, improves assembly efficiency, and is suitable for the internal layout of leakage current protection devices with compact space. Through modular integration design and structural optimization, this product takes into account installation efficiency, operational reliability and maintenance convenience, which is conducive to the automated assembly and production of the product. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a leakage current protection device for a utility model.

[0023] Figure 2 This is a cross-sectional structural diagram of a leakage current protection device of a utility model.

[0024] Figure 3 This is a schematic diagram of the installation structure of the transmission component and electromagnetic mechanism of the utility model.

[0025] Figure 4 This is a schematic diagram of the planar structure of the transmission component and electromagnetic mechanism of the utility model.

[0026] Figure 5 This is a structural schematic diagram of the protective cover module of the utility model;

[0027] Figure 6 This is a schematic diagram of the separate structure of the transmission component and the moving contact assembly of the utility model.

[0028] Figure Descriptions: 1. Housing; 2. Mounting Cover; 21. First Cover; 22. Second Cover; 23. First Mounting Cavity; 24. Second Mounting Cavity; 25. Mounting Plate; 26. Guide Slide; 27. Mounting Buckle; 28. Rotating Shaft Hole; 3. Transmission Mechanism; 31. Transmission Component; 311. Rotating Shaft; 312. Insertion Slot; 313. Guide Inclined Surface; 314. Limiting Protrusion; 32. Contact Support Component; 33. Moving Contact; 34. Torsion Spring Component; 35. Limiting Gap; 4. Electromagnetic Mechanism; 41. Armature Push Rod; 42. Coil Structure; 43. Yoke; 5. Return Spring; 6. Current Transformer Module; 7. Circuit Board; 8. Drive Rod; 81. Button; 82. Drive Inclined Surface; 9. Compression Spring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of this utility model, 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; they can refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] Example

[0033] This utility model provides, for example Figure 1-6 The modular installation structure of the leakage current protection device shown includes:

[0034] The protective cover module is installed inside the housing 1 and includes a first mounting cavity 23 and a second mounting cavity 24 that are spaced apart.

[0035] The transmission mechanism 3 is installed in the first mounting cavity 23 of the protective cover module. It includes a transmission component 31 rotatably disposed in the first mounting cavity 23 and two sets of contact assemblies coaxially linked to the transmission component 31.

[0036] The electromagnetic mechanism 4 is installed in the second mounting cavity 24 of the protective cover module. It includes an armature push rod 41 that moves linearly under the action of the electromagnetic force generated by the electromagnetic mechanism 4. The armature push rod 41 extends into the first mounting cavity 23 and is connected to the transmission member 31. A return spring 5 is provided between the transmission member 31 and the electromagnetic mechanism 4 and sleeved on the armature push rod 41. When the armature push rod 41 moves, it drives the transmission member 31 to rotate.

[0037] The above-described implementation method is the core technical solution of this embodiment. The transmission mechanism 3 and the electromagnetic mechanism 4 are respectively installed in the first mounting cavity 23 and the second mounting cavity 24 of the protective module. The advantage of this design is that the electromagnetic mechanism 4 and the transmission mechanism 3 can be pre-assembled into a whole and calibrated (such as magnetic circuit alignment and contact stroke adjustment) within the protective module, eliminating the performance deviation caused by accumulated errors in traditional step-by-step assembly. This ensures that the protective module is "plug and play" after being installed in the housing 1, realizing the integrated modular installation of the transmission mechanism 3 and the electromagnetic mechanism 4. Furthermore, the protective module can absorb external vibrations or mechanical shocks, providing installation protection for the electromagnetic mechanism 4 and the transmission mechanism 3, enhancing installation reliability and protection, and facilitating disassembly and maintenance. If the electromagnetic mechanism or the transmission mechanism is damaged, the protective module can be directly removed for replacement without disassembling the internal wiring of the plug. This modular design of the leakage protection device solves the problems of complex assembly, difficult maintenance, and low reliability of traditional leakage protection plugs through functional integration, modular installation, and systematic protection. It realizes modular assembly, reduces assembly complexity, shortens production time, and reduces costs.

[0038] The following is combined with Figure 3-5 The specific setup method for the protective cover module is explained in detail:

[0039] The protective cover module includes a first cover 21 with a first mounting cavity 23 and a second cover 22 with a second mounting cavity 24. The transmission mechanism 3 is installed in the first cover 21, and the electromagnetic mechanism 4 is installed in the second cover 22. The first cover 21 and the second cover 22 are fixedly connected or integrally connected. The transmission component 31 has two rotating shaft portions 311 extending coaxially at both ends, connecting two sets of contact assemblies. The side walls of the first cover 21 have two rotating shaft holes 28 that rotatably connect with the two rotating shaft portions 311, thereby allowing the transmission component 31 to be rotatably mounted on the first cover 21. The upper part of the housing 1 includes a contact support 32 sleeved on the rotating shaft 311, a moving contact 33 linked on the contact support 32, and a torsion spring 34 disposed between the contact support 32 and the transmission component 31. The housing 1 is provided with two stationary contacts opposite to the two moving contacts 33, and two pins that pass through the bottom of the housing 1 and are electrically connected to the two stationary contacts. This structure allows the two sets of contact assemblies and the transmission component 31 to be assembled into a transmission mechanism 3, and then the transmission mechanism 3 is installed as a whole on the first cover 21, realizing modular installation, which is convenient and quick to install and improves installation efficiency.

[0040] In a further preferred configuration, the torsion spring 34 is sleeved on the rotating shaft 311 and has two elastic end feet extending to connect the transmission member 31 and the contact support member 32 respectively. A limiting gap 35 is formed between the transmission member 31 and the contact support member 32 to accommodate the torsion spring 34. The contact support member 32 and the transmission member 31 are respectively provided with limiting protrusions 314 extending in the limiting gap and abutting against the two elastic end feet. This structural configuration restricts the torsion spring on the rotating shaft 311 through the physical boundary of the limiting gap, which can prevent the torsion spring from radially moving, axially shifting, or disengaging at the end, resulting in good installation stability. Furthermore, by using the two limiting protrusions 314 as force fulcrums at both ends of the torsion spring, the elastic potential energy of the torsion spring is converted into rotational torque around the rotating shaft, ensuring that the torque is transmitted between the transmission member 31 and the contact support member 32 through the torsion spring, thereby improving the contact closing / separation speed. As can be seen from the above structure, when the transmission component 31 rotates under the drive of the armature push rod 41, it compresses the torsion spring to drive the two sets of contact assemblies to rotate towards or away from the two stationary contacts, thereby realizing the contact or separation of the moving contact 33 and the stationary contact. The preload of the elastic component 34 provides the contact pressure. Compared with the traditional scheme where the moving spring relies on its own deformation, the contact pressure is more stable. Furthermore, the gradual pressure applied to the torsion spring by the contact support component 32 and the transmission component 31 eliminates the bouncing phenomenon of the traditional moving spring during high-speed collision, reduces the generation of electric arcs, reduces the risk of poor contact, and improves the performance and service life of the contact system.

[0041] Combination Figure 4-5As shown, the protective cover module also includes a mounting plate 25 connected to one side of the second cover 22. A current transformer module 6 is mounted on the mounting plate 25. The current transformer module 6 is a leakage current transformer used to detect leakage faults in the plug. When a leakage fault is detected, the power supply to the electromagnetic mechanism 4 is disconnected through the circuit board 7. The circuit board 7 is fixed to the protective cover module through a connecting structure. The current transformer module 6 and the electromagnetic mechanism 4 are respectively connected to the circuit board 7. The circuit board 7 covers the transmission mechanism 3, the electromagnetic mechanism 4, and the current transformer module 6. The connecting structure includes multiple mounting clips 27 set on the side wall of the protective cover module and multiple mounting holes set on the circuit board 7 and forming a snap-fit ​​with the multiple mounting clips 27. The snap-fit ​​structure enables quick installation and fixation between the circuit board 7 and the protective cover module. This technical solution integrates the transmission mechanism 3, electromagnetic mechanism 4, current transformer module 6, and circuit board 7 into a single installation unit through a protective cover module. This integrated installation reduces redundant structures, avoids the complexity of traditional split installation, significantly reduces assembly difficulty, and improves assembly efficiency. It is suitable for the internal layout of leakage protection devices in compact spaces. Through modular integration design and structural optimization, this product balances installation efficiency, operational reliability, and maintenance convenience, which is conducive to the automated assembly and production of the product.

[0042] The electromagnetic mechanism 4 includes a coil structure 42 installed in the second mounting cavity 24, a coil cavity extending axially along the coil structure 42, and a yoke 43 disposed at one end of the coil cavity. The armature push rod 41 is movably disposed within the coil cavity and forms an initial gap with the yoke 43. The coil structure 42 consists of a coil frame, an electromagnetic coil, and a magnetic yoke frame. The yoke 43 is connected to the magnetic yoke frame. The initial gap distance L1 is greater than the distance L2 required for the yoke 43 to electromagnetically attract the armature push rod 41. A drive structure is provided between the protective cover module and the housing 1 to drive the armature push rod 41 to move closer to the yoke 43. The length extension direction of the transmission member 31 is perpendicular to the length extension direction of the armature push rod 41. The transmission component 31 has a insertion slot 312 in the middle. One end of the armature push rod 41 that protrudes from the coil structure 42 is connected to the insertion slot 312. This structure means that the coil assembly cannot immediately engage the armature when energized. Instead, the armature push rod 41 needs to be driven by the drive structure to move closer to the yoke 43. The mechanical pre-propulsion of the drive structure shortens the effective stroke of electromagnetic engagement, so that the coil assembly does not need to directly overcome the large gap magnetic resistance. It only needs to provide the engagement force when the drive structure pushes the iron core rod to the engagement distance L2 range. This significantly reduces the instantaneous power requirement of the coil and effectively increases the movement stroke of the armature push rod. This meets the design requirement of increasing the contact opening distance. The low power requirement of this leakage protection device allows the use of a coil with fewer turns, reduces the volume of the electromagnetic mechanism 4, and facilitates the miniaturization of the overall plug.

[0043] The following is combined with Figure 1-3 The specific configuration of the drive structure is explained in detail:

[0044] The drive structure includes a drive rod 8 that extends vertically through the circuit board 7 into the first mounting cavity 23 and cooperates with the transmission component 31, and a compression spring 9 disposed between the drive rod 8 and the circuit board 7. The compression spring 9 applies an elastic force to the drive rod 8 to move upward and reset. A button 81 is provided at the upper end of the drive rod 8 that passes through the circuit board 7. The button 81 is arranged vertically opposite to the circuit board 7. The compression spring 9 is sleeved on the drive rod 8, and its two ends abut against the circuit board 7 and the button 81, respectively. A set of limiting hooks is provided at the bottom of the button 81 that passes through the circuit board 7. The limiting hooks cooperate with the lower side of the circuit board 7 under the force of the compression spring 9. The cooperation between the limiting hooks and the circuit board 7 plays a limiting installation role for the drive rod 8, thereby limiting the reset upward movement distance of the drive rod 8. When the button 81 is pressed down, the drive rod 8 is blocked by the limiting of the circuit board 7, thereby limiting the downward movement distance of the drive rod 8. This design assembles the drive structure and the protective cover module into a whole, realizing modular installation.

[0045] The working principle of this drive structure in conjunction with the electromagnetic mechanism 4 is as follows: by pressing down the drive rod 8, the transmission component 31 is rotated by a certain angle, which in turn drives the armature push rod 41 to move closer to the yoke 43, shortening the electromagnetic attraction stroke of the armature push rod 41 until the armature push rod 41 moves to the attraction distance L2 range and is attracted by the yoke 43, thereby realizing the rapid closure of the moving contact 33 and the stationary contact, and keeping the leakage protection device in the contact closed state. The advantage of this design is that even if the coil is energized, but the armature push rod 41 does not enter the attraction path L2 range, the electromagnetic mechanism 4 will keep the contact open because it cannot attract the armature push rod 41, avoiding the risk of accidental closure and meeting the mandatory disconnection safety requirements of the leakage protection device.

[0046] In a further preferred configuration, the lower end of the drive rod 8 is provided with a drive ramp 82, and the middle part of the transmission component 31 is provided with a guide ramp 313 that cooperates with the drive ramp 82; the circuit board 7 is provided with a guide hole through which the drive rod 8 can pass; the inner wall of the cover module facing the guide ramp 313 is provided with a guide groove 26 extending axially along the guide hole, and the guide groove 26 is specifically provided on the first cover body; the drive rod 8 passes through the guide hole and the guide groove 26, and the drive rod is guided by the guide hole and the guide groove. The movement of rod 8 serves as a guide, preventing the drive rod 8 from deviating from its intended direction and ensuring the accuracy and stability of the drive rod 8 in triggering the rotation of the transmission component 31. This structural design, through the cooperation of the drive inclined surface 82 and the guide inclined surface 313, converts the linear thrust of the drive rod 8 into the rotational torque of the transmission component 31, thereby applying a thrust to the armature push rod 41 near the end of the yoke 43. This inclined surface meshing design helps reduce friction, improve the reliability of the action, avoid jamming, simplify the transmission structure, and is suitable for the internal layout of leakage protection devices with compact space.

[0047] 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 protection scope of this invention.

Claims

1. A modular installation structure for a leakage current protection device, characterized in that, include: The protective cover module is installed inside the housing (1) and includes a first mounting cavity (23) and a second mounting cavity (24) spaced apart. The transmission mechanism (3) is installed in the first mounting cavity (23) of the protective cover module. It includes a transmission component (31) rotatably disposed in the first mounting cavity (23) and two sets of contact assemblies coaxially linked to the transmission component (31). An electromagnetic mechanism (4) is installed in the second mounting cavity (24) of the protective cover module. It includes an armature push rod (41) that moves linearly under the electromagnetic force generated by the electromagnetic mechanism (4). The armature push rod (41) extends into the first mounting cavity (23) and is connected to the transmission member (31). A return spring (5) sleeved on the armature push rod (41) is provided between the transmission member (31) and the electromagnetic mechanism (4). When the armature push rod (41) moves, it drives the transmission member (31) to rotate.

2. The modular installation structure of the leakage current protection device according to claim 1, characterized in that: The protective cover module includes a first cover (21) with a first mounting cavity (23) and a second cover (22) with a second mounting cavity (24). The transmission mechanism (3) is installed in the first cover (21) and the electromagnetic mechanism (4) is installed in the second cover (22). The first cover (21) and the second cover (22) are fixedly connected or integrally connected.

3. The modular installation structure of the leakage current protection device according to claim 2, characterized in that: The protective cover module also includes a mounting plate (25) connected to one side of the second cover (22), on which a current transformer module (6) is mounted.

4. The modular installation structure of the leakage current protection device according to claim 3, characterized in that: It also includes a circuit board (7) fixed to the top of the protective cover module by a connecting structure. The current transformer module (6) and the electromagnetic mechanism (4) are respectively connected to the circuit board (7). The circuit board (7) covers the transmission mechanism (3), the electromagnetic mechanism (4), and the current transformer module (6). The connecting structure includes multiple mounting buckles (27) set on the side wall of the protective cover module and multiple mounting holes set on the circuit board (7) and forming a buckle engagement with the multiple mounting buckles (27).

5. The modular installation structure of the leakage current protection device according to any one of claims 2-4, characterized in that: The transmission component (31) has two rotating shafts (311) that extend coaxially to connect two sets of contact assemblies at both ends. The two side walls of the first cover (21) are provided with two rotating shaft holes (28) that are rotatably connected to the two rotating shafts (311). Each set of contact assemblies includes a contact support (32) sleeved on the rotating shaft (311), a movable contact (33) linked on the contact support (32), and a torsion spring (34) provided between the contact support (32) and the transmission component (31). When the transmission component (31) rotates, it drives the contact support (32) to rotate by squeezing the torsion spring.

6. The modular installation structure of the leakage current protection device according to claim 5, characterized in that: The torsion spring (34) is sleeved on the rotating shaft (311) and has two elastic end feet that extend and connect the transmission member (31) and the contact support member (32) respectively. A limiting gap (35) for accommodating the torsion spring is formed between the transmission member (31) and the contact support member (32). The contact support member (32) and the transmission member (31) are respectively provided with limiting protrusions (314) that extend into the limiting gap and abut against the two elastic end feet.

7. The modular installation structure of the leakage current protection device according to claim 1, characterized in that: The electromagnetic mechanism (4) includes a coil structure (42) installed in the second mounting cavity (24), a coil cavity extending axially along the coil structure (42) and a yoke (43) at one end of the coil cavity. The armature push rod (41) is movably disposed in the coil cavity and forms an initial gap with the yoke (43). The distance L1 of the initial gap is greater than the distance L2 required for the yoke (43) to attract the armature push rod (41) by electromagnetic force. A drive structure is provided between the shield module and the housing (1) to drive the armature push rod (41) to move closer to the yoke (43).

8. The modular installation structure of the leakage current protection device according to claim 7, characterized in that: The length extension direction of the transmission component (31) is perpendicular to the length extension direction of the armature push rod (41). The transmission component (31) has a insertion groove (312) in the middle. One end of the armature push rod (41) passes through the coil structure (42) and is connected to the insertion groove (312).

9. The modular installation structure of the leakage current protection device according to claim 7, characterized in that: The drive structure includes a drive rod (8) that extends vertically through the circuit board (7) into the first mounting cavity (23) and cooperates with the transmission component (31), and a compression spring (9) disposed between the drive rod (8) and the circuit board (7). The upper end of the drive rod (8) through the circuit board (7) is provided with a button (81). The button (81) is arranged vertically opposite to the circuit board (7). The bottom of the button (81) is provided with a set of limiting hooks that pass through the circuit board (7). The limiting hooks cooperate to hook against the lower side of the circuit board (7) under the force of the compression spring (9).

10. The modular installation structure of the leakage current protection device according to claim 9, characterized in that: The lower end of the drive rod (8) is provided with a drive ramp (82), and the middle part of the transmission component (31) is provided with a guide ramp (313) that cooperates with the drive ramp (82); the circuit board (7) is provided with a guide hole through which the drive rod (8) can pass; the inner wall of the cover module facing the guide ramp (313) is provided with a guide groove (26) extending axially along the guide hole; the drive rod (8) passes through the guide hole and the guide groove (26).

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