Leakage protection device having additional function

Abstract

The present disclosure provides a leakage protection device having an additional function. The leakage protection device comprises: a shell, an input end configured to be coupled to a power supply, an output end configured to be coupled to a load end, and a core assembly arranged in the shell, wherein the input end is attached to the lower surface of the shell, the core assembly at least comprises a first printed circuit board and a second printed circuit board, the first printed circuit board and the second printed circuit board are stacked in parallel with each other, and the element surfaces of the first printed circuit board and the second printed circuit board are parallel to the lower surface of the shell; a leakage protection assembly, which at least comprises a trip coil assembly and a detection magnetic ring, so as to detect a leakage current signal of the output end; and an additional functional assembly, which is coupled to the leakage protection assembly and at least comprises one of the first printed circuit board and the second printed circuit board, so as to implement at least one load-end function, wherein a heat dissipation assembly is provided between the first printed circuit board and / or the second printed circuit board and the shell, and / or between the first printed circuit board and the second printed circuit board. By integrating the additional functional assembly and the heat dissipation assembly in the leakage protection device, on the basis of a leakage protection function, the present disclosure can implement at least some of the functions of an electric device at the load end and is conducive to heat dissipation of a heating element within a limited space, so as to prevent the local temperature of the surface of the shell from being excessively high, thereby implementing more diversified functions while ensuring the reliability of the leakage protection device, allowing the leakage protection device to be adapted to various electric devices, and providing users with richer solutions for integrating leakage protection products.

Description

Residual current protection device with additional functions Technical Field

[0001] This disclosure relates generally to the field of residual current devices, and more particularly to a residual current device with additional functions. Background Technology

[0002] With the continuous improvement of living standards and increased awareness of electrical safety, products with leakage current protection (RCD) functions are being used in increasingly wider applications. Traditional RCDs only provide leakage protection, but with changing market demands, the types of electrical equipment or loads compatible with RCDs are also increasing. As people's requirements for the reliability and functionality of RCDs grow, new functions of certain loads are placing additional functional demands on RCDs and requiring higher safety standards, especially for personal care appliances. Therefore, the market currently needs a product that can safely and reliably integrate some functions of the electrical equipment at the load end with a RCD. Summary of the Invention

[0003] Based on the above requirements, this disclosure proposes a leakage current protection device with additional functions, which meets the market's demand for additional functions and safety requirements at the load end with a reasonable structural layout and compact shape design.

[0004] Therefore, according to this disclosure, a leakage current protection device with additional functions is provided, including a housing, an input terminal for coupling to a power supply, an output terminal for coupling to a load terminal, and a mechanism assembly disposed within the housing. The input terminal is attached to the lower surface of the housing. The mechanism assembly includes at least: a first printed circuit board and a second printed circuit board, wherein the first printed circuit board and the second printed circuit board are stacked parallel to each other, and the component surfaces of the first printed circuit board and the second printed circuit board are parallel to the lower surface of the housing; a leakage current protection component, including at least a trip coil assembly and a detection magnetic ring, for detecting the leakage current signal of the output terminal; and an additional function component, coupled to the leakage current protection component and including at least one of the first printed circuit board and the second printed circuit board, to realize at least one load terminal function, wherein a heat dissipation component is provided between the first printed circuit board and / or the second printed circuit board and the housing, and / or between the first printed circuit board and the second printed circuit board.

[0005] Based on the above-described technical concept, this disclosure may further include any one or more of the following alternative forms.

[0006] In some alternative configurations, the heat dissipation assembly is arranged adjacent to the heat-generating elements on the first and / or second printed circuit boards for dissipating heat from the heat-generating elements.

[0007] In some alternative configurations, the heating elements on the first printed circuit board and the heating elements on the second printed circuit board are arranged in opposite directions and facing the inner surface of the housing.

[0008] In some alternative forms, the heat dissipation assembly includes at least one heat sink having a base wall parallel to the first or second printed circuit board and at least a pair of parallel sidewalls extending perpendicularly from the edge of the base wall, the base wall being disposed at least between the first or second printed circuit board and the inner surface of the housing, the at least a pair of sidewalls covering at least a portion of the movement assembly.

[0009] In some alternative forms, the heat sink further includes at least one pair of side walls that extend at an angle from the edges of the at least one pair of side walls or extend perpendicularly from the edges of the base wall and are connected to or spaced apart from the at least one pair of side walls, the at least one pair of side walls extending toward each other to cover at least a portion of the movement assembly.

[0010] In some alternative forms, the at least one pair of side walls are close to each other or spaced apart.

[0011] In some alternative forms, the heat dissipation assembly further includes at least one heat-conducting element, which is disposed at a position corresponding to the heat-generating element on the first printed circuit board and / or the second printed circuit board, and contacts the heat-generating element and the at least one heat dissipation element respectively to form a heat conduction path.

[0012] In some alternative forms, the leakage protection device further includes at least one insulating element disposed between the at least one heat sink and the non-heat-generating elements of the first printed circuit board and / or the second printed circuit board for isolation and insulation.

[0013] In some alternative forms, the at least one insulating element is adapted to at least a portion of the contour shape of the at least one heat sink element.

[0014] In some alternative forms, the at least one insulating element has an opening, through which the at least one thermally conductive element contacts the at least one heat dissipation element.

[0015] In some alternative forms, the opening is adapted to the shape of the at least one heat-conducting element.

[0016] In some alternative forms, the heat dissipation assembly has a first base wall parallel to the first or second printed circuit board, and at least a pair of parallel side walls extending perpendicularly from the edge of the first base wall, the first base wall being disposed between the first printed circuit board and the inner surface of the housing, the heat dissipation assembly further having a second base wall parallel to the first base wall, the second base wall being disposed between the second printed circuit board and the inner surface of the housing, the at least a pair of side walls covering at least a portion of the additional functional component.

[0017] In some alternative forms, the heat dissipation assembly includes at least a first heat dissipation element and a second heat dissipation element, wherein the first heat dissipation element includes at least the first base wall, and the second heat dissipation element includes at least the second base wall.

[0018] In some alternative forms, the first heat sink has at least a pair of first sidewalls extending perpendicularly from the edge of the first base wall and parallel to each other; the second heat sink has at least a pair of second sidewalls extending perpendicularly from the edge of the second base wall and parallel to each other.

[0019] In some alternative forms, the first heat sink and the second heat sink are connected to each other and cover at least a portion of the movement assembly.

[0020] In some alternative forms, the first heat sink and the second heat sink are fixedly connected by a snap-fit ​​structure disposed on the at least one pair of first sidewalls and the at least one pair of second sidewalls.

[0021] In some alternative forms, the at least one pair of first sidewalls of the first heat sink and the at least one pair of second sidewalls of the second heat sink partially overlap.

[0022] In some alternative forms, the first heat sink further includes at least one pair of first side walls, which extend at an angle from the edges of the at least one pair of first side walls or extend perpendicularly from the edges of the first base wall and are connected to or spaced apart from the at least one pair of first side walls, the at least one pair of first side walls extending toward each other to cover at least a portion of the additional functional component, and / or the second heat sink further includes at least one pair of second side walls, which extend at an angle from the edges of the at least one pair of second side walls or extend perpendicularly from the edges of the second base wall and are connected to or spaced apart from the at least one pair of second side walls, the at least one pair of second side walls extending toward each other to cover at least a portion of the leakage protection component.

[0023] In some alternative forms, the at least one pair of first side walls are close to each other or form a gap, and / or the at least one pair of second side walls are close to each other or form a gap.

[0024] In some alternative forms, the leakage protection device includes a first insulating member disposed between the first heat sink and the non-heat-generating element of the first printed circuit board, and a second insulating member disposed between the second heat sink and the non-heat-generating element of the second printed circuit board.

[0025] In some alternative forms, the first insulating member is adapted to at least a portion of the contour shape of the first heat sink, and / or the second insulating member is adapted to at least a portion of the contour shape of the second heat sink.

[0026] In some alternative configurations, the leakage current protection device further includes a middle layer support arranged between the leakage current protection component and the additional functional component, and the heat dissipation component is fixed to the middle layer support.

[0027] In some alternative configurations, the heat dissipation assembly and the middle support are fixedly connected by snap-fit ​​structures and / or fasteners.

[0028] In some alternative forms, the heat dissipation assembly includes a middle heat sink disposed within the middle support and close to the heat-generating elements of the first printed circuit board and / or the second printed circuit board.

[0029] In some alternative forms, the intermediate heat sink has an intermediate base wall parallel to the first or second printed circuit board, and at least one pair of intermediate sidewalls extending perpendicularly from the edge of the intermediate base wall and parallel to each other. The intermediate base wall is disposed between the first or second printed circuit board and the intermediate support, and the at least one pair of intermediate sidewalls covers at least a portion of the heat-generating elements of the first and / or second printed circuit boards.

[0030] In some alternative forms, the middle heat sink further includes at least one pair of middle side walls, which extend at an angle from the edges of the at least one pair of middle side walls or extend perpendicularly from the edges of the middle base wall and are connected to or spaced apart from the at least one pair of middle side walls, the at least one pair of middle side walls extending toward each other to cover at least a portion of the heat-generating element of the first printed circuit board or the second printed circuit board.

[0031] In some alternative forms, the at least one pair of middle-layer side walls are close to each other or spaced apart.

[0032] In some alternative forms, the leakage protection device further includes a heat-conducting element disposed between the middle heat sink and the heating element of the first printed circuit board and / or the second printed circuit board, the heat-conducting element contacting the heating element and the middle heat sink respectively to form a heat conduction path.

[0033] In some alternative configurations, the middle support is provided with cable management blocks for bending the output power cables.

[0034] In some alternative configurations, a cable baffle is also provided on the middle support, and the cable management block is disposed on the cable baffle.

[0035] In some alternative forms, the heat dissipation component is integrally formed from a plate-like part by stamping.

[0036] In some alternative forms, the leakage current protection device includes at least four independent current-carrying conductors, and the leakage current protection component detects leakage current signals on the current-carrying conductors.

[0037] In some alternative configurations, the first printed circuit board and the second printed circuit board are electrically connected via current-carrying core wires or conductive posts.

[0038] In some alternative forms, the input terminal includes at least two pins extending out of the housing, the first printed circuit board and the second printed circuit board being arranged perpendicular to the insertion direction of the pins, wherein the pins are coupled to the first printed circuit board or the second printed circuit board via current-carrying core wires.

[0039] In some alternative forms, the housing includes at least an upper housing and a lower housing, the upper housing having an output end through hole for accommodating an output power cable, and the pins being fixed to the lower housing.

[0040] In some alternative configurations, the first printed circuit board is located away from the input terminal relative to the second printed circuit board, and the heat dissipation assembly is disposed at least between the first printed circuit board and the inner surface of the upper housing; or the first printed circuit board is located closer to the input terminal relative to the second printed circuit board, and the heat dissipation assembly is disposed at least between the first printed circuit board and the inner surface of the lower housing.

[0041] In some alternative configurations, the lower housing and the upper housing are fixedly connected by fasteners.

[0042] In some alternative forms, the housing further includes a lower housing cover plate, which is fixedly connected to and covers the lower housing, and the lower housing cover plate is provided with a through hole for the prongs to extend out.

[0043] In some alternative forms, the lower housing cover is fixedly connected to the lower housing by a snap-fit ​​structure and / or fasteners and / or adhesives.

[0044] In some alternative configurations, the lower housing cover plate is fixedly connected to the lower housing by an adhesive sheet, the adhesive sheet having through holes for the prongs to extend and snap-fit ​​holes, and the lower housing cover plate having corresponding snap hooks.

[0045] In some alternative forms, the leakage protection device further includes a wire clamping assembly for securing the output power cord within the housing and configured to move only along the insertion direction of the pins.

[0046] In some alternative forms, the leakage protection device is further provided with a power cord bending buffer device, which has a snap-fit ​​protrusion that passes through the output end through hole of the housing and is fixedly engaged with the wire clamping assembly.

[0047] In some alternative forms, the wire clamping assembly includes a first wire clamping block and a second wire clamping block arranged opposite to each other along the insertion direction of the pin, wherein the first wire clamping block is provided with a first notch, the second wire clamping block is provided with a second notch, and the first notch and / or the second notch is provided with a bevel, the bevel engaging with the snap-fit ​​protrusion of the power cord bending buffer device.

[0048] In some alternative forms, the load-side functions include at least power conversion functions and / or electromagnetic compatibility filtering functions and / or switching control functions.

[0049] In some alternative configurations, the first printed circuit board is provided with at least one rectifier for converting the AC power supply connected to the input terminal into DC power supply.

[0050] In some alternative configurations, at least two of the current-carrying core wires are coupled to the rectifier.

[0051] In some alternative forms, the rectifier device includes at least a diode or a rectifier bridge.

[0052] In some alternative configurations, the surface of the rectifier device is provided with a heat-conducting element.

[0053] In some alternative forms, the leakage current protection component includes at least a detection component and a circuit breaking component, wherein the detection component detects a leakage current signal at the output terminal, and the circuit breaking component disconnects the power supply circuit in response to the leakage current signal.

[0054] In some alternative forms, the detection component includes a detection magnetic ring having an inner hole and being coupled to the first printed circuit board or the second printed circuit board, for detecting leakage current signals of a power circuit passing through the inner hole and transmitting them to the first printed circuit board or the second printed circuit board.

[0055] In some alternative forms, the circuit breaker assembly includes an input stationary contact assembly coupled to the input terminal and an output moving contact assembly passing through the inner hole of the detection magnetic ring and coupled to the output terminal, wherein the circuit breaker assembly disconnects the electrical connection between the input stationary contact assembly and the output moving contact assembly in response to the leakage current signal.

[0056] In some alternative forms, the leakage protection component includes an operating element linked to the circuit breaker component, the operating element including a reset element and a trip element, to switch the input stationary contact component and the output moving contact component between a closed state and an open state.

[0057] In some alternative forms, the operating element further includes a test element coupled to the first or second printed circuit board for generating a simulated leakage current signal.

[0058] In some alternative forms, the leakage protection device further includes a status indicator made of a light-transmitting material and disposed between the first or second printed circuit board and the housing.

[0059] This disclosure integrates additional functional components and heat dissipation components into a residual current device (RCD), enabling at least some of the functions of the load-side electrical equipment within a limited space, while also facilitating heat dissipation of heat-generating elements and preventing excessively high localized temperatures on the casing surface. This ensures the reliability of the RCD while providing more diverse functions, adapting to various electrical devices and offering users a wider range of integrated RCD solutions. Furthermore, the RCD of this disclosure has a simple structure, is easy to implement, and facilitates its widespread application. Attached Figure Description

[0060] Other features and advantages of this disclosure will be better understood through the following detailed description of alternative embodiments in conjunction with the accompanying drawings, wherein:

[0061] Figure 1 is a schematic diagram of the external appearance of a leakage current protection device according to an embodiment of the present disclosure;

[0062] Figure 2 is an exploded view of the leakage current protection device in Figure 1;

[0063] Figure 3 is an exploded view of the movement components, heat dissipation components, heat conduction components, and insulation components in Figure 2;

[0064] Figure 4 is an exploded view of the movement components, heat dissipation components, heat conduction components, and insulation components from another angle.

[0065] Figure 5 is an exploded view of the movement components in Figure 3;

[0066] Figure 6 is an exploded view of the leakage current protection component in Figure 5;

[0067] Figure 7A is a schematic diagram of the position status of each component when the leakage current protection assembly is in the off state.

[0068] Figure 7B is a schematic diagram of the position of each component when the reset button is operated (pressed) in the state shown in Figure 7A;

[0069] Figure 7C is a schematic diagram of the position of each component when the reset button is operated (released) to make the leakage current protection component close in the state shown in Figure 7B.

[0070] Figure 8 is an exploded view of a leakage current protection device according to another embodiment of the present disclosure;

[0071] Figure 9 is a schematic diagram of the assembly of the core component of the leakage current protection device in Figure 8, which includes leakage current protection components and additional functional components.

[0072] Figure 10 is an exploded view of the movement components in Figure 9;

[0073] Figure 11 is a schematic diagram of the assembly of the movement assembly, housing, and button assembly in Figure 8;

[0074] Figure 12 is a schematic diagram of the assembly of the movement components and the housing, including the upper housing, the output power line assembly, and the wire clamping assembly.

[0075] Figure 13A is a cross-sectional view of the assembly after the wire clamping assembly has snapped the output power cable assembly into the output end through hole of the housing.

[0076] Figure 13B is a schematic diagram showing the state after assembly, in which the power cord is bent into a U-shape inside the housing by the cable management block and cable baffle.

[0077] Figure 14 is a schematic diagram of the external appearance of a leakage current protection device according to another embodiment of the present disclosure;

[0078] Figure 15 is an exploded view of the leakage current protection device in Figure 14;

[0079] Figure 16 is an exploded view of the movement components, heat dissipation components, heat conduction components, and insulation components in Figure 15.

[0080] Figure 17 is an exploded view of the movement components in Figure 16;

[0081] Figure 18 is a circuit diagram of a leakage current protection device according to an embodiment of the present disclosure. Detailed Implementation

[0082] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using this disclosure, and are not intended to limit the scope of this disclosure. The descriptions of the structural positions of various components, such as up, down, top, bottom, etc., are not absolute but relative. These directional descriptions are appropriate when the various components are arranged as shown in the figures, but they change accordingly when the positions of the various components in the figures change.

[0083] In this document, the expressions “including” or similar expressions such as “contains” and “has” are open-ended and do not exclude additional unlisted elements or functions.

[0084] In this document, unless otherwise explicitly specified, terms such as "coupled," "installed," "connected," and "attached" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0085] In this article, the terms “first”, “second”, etc., are not used to specify the order or quantity, unless otherwise stated.

[0086] It has been recognized that traditional residual current devices (RCDs) only provide leakage current protection, which is relatively simple and has limited application scenarios. To meet the more diversified needs of the market, such as when products are adapted to personal care appliances like high-speed hair dryers and curling irons, it is necessary to address high-frequency electromagnetic interference or provide DC power. Furthermore, to make the load end lightweight and compact, it is necessary to incorporate, for example, an electromagnetic compatibility module or a DC power module into the RCD, thereby providing users with a safe and comfortable product experience.

[0087] Therefore, the present invention is conceived to provide a product with additional functions in response to the increasing demand for functional compatibility of existing leakage current protection devices with different electrical equipment. This product is suitable for realizing some functions of electrical equipment and has a reasonable structural layout and compact shape design.

[0088] In this document, the residual current device is exemplified by a plug, and it should be understood that no other residual current device is excluded that may be applicable to the present invention.

[0089] Referring to Figures 1 to 7C, a residual current device (RCD) according to one embodiment of the present disclosure is shown. In this embodiment, the RCD includes a housing and a mechanism assembly disposed within the housing, as well as an input terminal and an output terminal (e.g., an output power cord assembly) fixedly connected to and extending outside the housing. The housing may include, for example, an upper housing assembly 1 and a lower housing assembly 3 for supporting or fixing components within the housing. The upper housing assembly 1 may include an upper housing 10 and a button assembly (e.g., including a reset button 11, a test button 12, a status indicator 13, etc.). The side of the upper housing 10 also has an output terminal through-hole for accommodating and passing through a power cord, i.e., an output power cord assembly 14, to achieve an electrical connection with an electrical load. The lower housing assembly 3 may include a lower housing 30. It should be understood that "upper" and "lower" here refer to the orientation of the RCD in the illustrated plug form during normal use and are not intended as limitations.

[0090] In the illustrated embodiment, the input terminal of the leakage current protection device is used to couple to a power supply, and the output terminal is used to couple to a load terminal. The input terminal is attached to the lower surface of the housing and includes at least two prongs 32 extending out of the housing for insertion into a socket to draw power. The prongs 32 are fixed relative to the lower housing 30. In some embodiments, the upper housing 10 and the lower housing 30 can be assembled and fixed together using fasteners such as screws. The lower housing assembly 3 may also include a lower housing cover 34 disposed on the outside of the lower housing 30 to cover the screw holes. Depending on different needs, the lower housing cover 34 and the lower housing 30 can be assembled and fixed together by a snap-fit ​​structure and / or fasteners and / or adhesives to cover the lower housing 30. The lower housing cover 34 has corresponding through holes 342 for the prongs 32 to extend through the housing surface. In some embodiments, the lower housing cover plate 34 and the lower housing 30 can be fixedly connected by an adhesive piece 33 (e.g., double-sided adhesive). The adhesive piece 33 is provided with a through hole 332 for the prongs 32 to extend out and a snap-fit ​​hole 331. The lower housing cover plate 34 is provided with a corresponding snap hook 341 to pass through the snap-fit ​​hole 331 and snap onto the lower housing 30, thereby further achieving a stable connection.

[0091] Referring to Figures 3 to 5, the mechanism assembly 5 includes at least a first printed circuit board 520 and a second printed circuit board 510, a leakage current protection assembly 51, and an additional functional assembly 52. ​​The first and second printed circuit boards are stacked parallel to each other, and the component surfaces of the first and second printed circuit boards are parallel to the lower surface of the housing. The leakage current protection assembly 51 includes at least a trip coil assembly and a detection magnetic ring to detect leakage current signals at the output terminal. The additional functional assembly 52 is coupled to the leakage current protection assembly 51 and includes at least one of the first and second printed circuit boards, such as the illustrated first printed circuit board 520 and functional components coupled to the first printed circuit board 520, to implement at least one load-side function. Specifically, in some embodiments, the leakage current protection device may include at least four independent current-carrying core wires, and the leakage current protection assembly 51 is used to detect leakage current signals on the current-carrying core wires.

[0092] According to this disclosure, the load-side functions achievable by the additional functional component include at least power conversion (AC / DC or DC / DC conversion) and / or electromagnetic compatibility (EMC) filtering and / or switching control functions. Based on the concept of this disclosure, the additional functional component 52 can combine, combine in pairs, or select one of, for example, power conversion, EMC filtering, and switching control functions. It should be understood that the functional components are various electronic devices used to achieve, for example, AC / DC or DC / DC conversion and / or EMC filtering and / or switching control functions, including but not limited to capacitors, inductors, impedance devices, etc. Accordingly, the first printed circuit board 520 has heat-generating elements 54 such as rectifier bridges and control chips. Similarly, the second printed circuit board 510 has heat-generating elements 54 such as inductors 541 and control chips. In some embodiments, the first printed circuit board 520 is provided with at least a rectifier device for converting the AC power connected to the input terminal into DC power, for use in personal care electrical appliances, in particular. In some implementations, the rectifier includes at least a diode or a rectifier bridge, and further, at least two current-carrying core wires are coupled to the rectifier.

[0093] Advantageously, as shown in Figures 3 to 5, the first printed circuit board 520 and the second printed circuit board 510 are stacked parallel to each other, and a heat dissipation assembly 2 is provided between the first printed circuit board 520 and / or the second printed circuit board 510 and the housing, and / or between the first printed circuit board 520 and the second printed circuit board 510. Furthermore, the first printed circuit board 520 and the second printed circuit board 510 are arranged perpendicular to the insertion direction of the pin 32, wherein the pin 32 is coupled to the second printed circuit board 510 or the first printed circuit board 520 via a current-carrying core wire 31.

[0094] In this way, the leakage current protection device of this disclosure integrates additional functional components within a limited housing space with an optimized structural layout, ensuring the reliability of the leakage current protection device while providing more diversified functions. Furthermore, by incorporating a heat dissipation component, heat dissipation of the heat-generating elements on the first and second printed circuit boards is facilitated. Optimized design of the structure and arrangement of the heat dissipation component maximizes the heat dissipation surface to prevent excessively high local temperatures on the housing surface, ensuring the product's safety and reliability while maintaining its diversified functions.

[0095] Advantageously, the heat dissipation assembly is arranged adjacent to the heat-generating elements on the first and / or second printed circuit boards for heat dissipation of the heat-generating elements, which also achieves effective heat dissipation while satisfying the compact structural design. Further advantageously, the heat-generating elements 54 on the first and second printed circuit boards 520 and 510 are arranged in opposite directions and facing the inner surface of the housing, so that the heat-generating elements are close to the heat dissipation assembly to facilitate heat dissipation, while reducing the processing and assembly difficulty of the heat dissipation component.

[0096] In some embodiments, the second printed circuit board 510 may be configured for the leakage current protection component 51. The second printed circuit board is located away from the input terminal relative to the first printed circuit board 520 of the additional functional component 52; that is, the second printed circuit board 510 is arranged away from the pin 32. Accordingly, a heat dissipation component is arranged at least between the first printed circuit board 520 and the inner surface of the lower housing 30 to dissipate heat, particularly from the heat-generating elements of the first printed circuit board 520, preventing heat generated by the components used to implement the increased load-side function from affecting the normal use of the product and improving safety. Positioning the second printed circuit board 510 away from the input terminal relative to the first printed circuit board 520 facilitates the placement of the button assembly in the leakage current protection component on the upper surface of the housing. Furthermore, the leakage current protection function relies on a zero-sequence current transformer to detect the minute difference (typically in the milliampere range) between the live and neutral currents. If the second printed circuit board of the leakage current protection component 51 is close to the input terminal, it is susceptible to interference from large currents, power supply noise, and high-frequency harmonics, leading to misjudgment or decreased sensitivity. A layout further away from the input terminal reduces the impact of electromagnetic interference on the signal amplification circuit, ensuring the accuracy of leakage current detection. It also helps prevent false triggering or failure due to voltage fluctuations, thereby ensuring the reliability and response speed of the leakage current protection function under complex operating conditions. In some embodiments, the second printed circuit board 510 may also be closer to the input terminal than the first printed circuit board 520. Correspondingly, a heat dissipation component is arranged at least between the first printed circuit board 520 and the inner surface of the upper housing 10.

[0097] Figures 3 to 5 respectively illustrate an assembly diagram and an exploded diagram of the movement assembly 5, which includes a leakage protection component 51 and an additional functional component 52, and respectively illustrate a heat dissipation component of one embodiment.

[0098] In the illustrated embodiment, the leakage current protection device further includes a middle layer bracket 53, which is arranged between the leakage current protection component 51 and the additional functional component 52. Some electronic components on the leakage current protection component 51 and the additional functional component 52 can be accommodated in the middle layer bracket 53 or positioned and supported by the middle layer bracket 53. The first printed circuit board 520 and the second printed circuit board 510 can be electrically connected via current-carrying core wires 55 passing through the middle layer bracket 53. As can be seen from Figure 2, the lower housing 30 has screw holes 301 on its edge. The mounting screws 6 can pass through the screw holes 301 and the bracket screw posts 531 on the middle layer bracket 53, and are assembled and fixed with the screw holes (not shown) of the upper housing 10.

[0099] According to the concept of this disclosure, the heat dissipation assembly includes at least one heat sink having a base wall parallel to the first printed circuit board or the second printed circuit board, and at least a pair of side walls extending vertically from the edge of the base wall and parallel to each other. The base wall is at least disposed between the first printed circuit board or the second printed circuit board and the inner surface of the housing, and the at least a pair of side walls cover at least a portion of the mechanism assembly.

[0100] In the embodiments shown in Figures 2 to 5, the heat dissipation assembly 2 may include a first heat dissipation element 22 and a second heat dissipation element 21. The first heat dissipation element 22 has a first base wall 223 parallel to the first printed circuit board 520 and at least a pair of first side walls 222 extending vertically from the edge of the first base wall 223 and parallel to each other. The first base wall 223 is arranged between the inner surface of the first printed circuit board 520 and the housing (lower housing 30) to be close to the heat-generating element 54 on the first printed circuit board 520. The at least a pair of first side walls 222 cover at least a portion of the additional functional component 52 to form a heat dissipation portion. Similarly, the second heat sink 21 has a second base wall 213 parallel to the second printed circuit board 510, and at least a pair of second side walls 212 extending vertically from the edge of the second base wall 213 and parallel to each other. The second base wall 213 is arranged between the second printed circuit board 510 and the inner surface of the housing (upper housing 10) to be close to the heat-generating element 54 on the second printed circuit board 510. The at least a pair of second side walls 212 cover at least a portion of the leakage protection assembly 51 to form a heat sink.

[0101] In the illustrated embodiment, the first heat sink 22 and the second heat sink 21 can be constructed as plate-like parts, with corresponding base walls and bent side walls integrally formed by stamping. Furthermore, in the illustrated embodiment, the first heat sink 22 and the second heat sink 21 are respectively exemplary formed as generally U-shaped; depending on different needs, the heat dissipation assembly can also be constructed in other suitable forms. For example, the heat dissipation assembly may have a first base wall parallel to the first or second printed circuit board, and at least a pair of parallel side walls extending perpendicularly from the edge of the first base wall. The first base wall is disposed between the inner surface of the first printed circuit board and the housing. The heat dissipation assembly also has a second base wall parallel to the first base wall, disposed between the inner surface of the second printed circuit board and the housing. At least a pair of side walls cover at least a portion of the additional functional components. Thus, the heat dissipation assembly can be constructed to include at least a first heat sink and a second heat sink, wherein the first heat sink includes at least a first base wall, and the second heat sink includes at least a second base wall. For example, the first heat sink and the second heat sink can be constructed in a generally L-shape, or the first heat sink can be constructed in a generally U-shape and the second heat sink can be constructed in a generally flat plate shape, and so on.

[0102] Advantageously, the first heat sink 22 and the second heat sink 21 are connected to each other and cover at least a portion of the movement assembly. In some embodiments, the first heat sink 22 and the second heat sink 21 can be fixedly connected by a snap-fit ​​structure provided on at least a pair of first sidewalls 222 and at least a pair of second sidewalls 212. For example, as shown in Figures 3 and 4, the first sidewall 222 may be provided with a hook 221, and the second sidewall 212 may be provided with a corresponding slot 211, thereby facilitating the snap-fit ​​fixing of the heat sink assembly 2 after the movement assembly 5 is assembled. Advantageously, at least a pair of first sidewalls 222 of the first heat sink 22 and at least a pair of second sidewalls 212 of the second heat sink 21 partially overlap. In this way, the heat sink assembly 2 can provide sufficient heat dissipation surface within a limited housing space to facilitate heat dissipation of the heat-generating elements on the first printed circuit board 520 and the second printed circuit board 510 and prevent local overheating of the housing surface.

[0103] In some embodiments, the heat sink may further include at least a pair of side walls, which extend at an angle from the edges of the at least a pair of side walls or extend perpendicularly from the edges of the base wall and are connected to or spaced apart from the at least a pair of side walls, and the at least a pair of side walls extend toward each other to cover at least a portion of the movement assembly.

[0104] Specifically, in the illustrated embodiment, the first heat sink 22 may further include at least one pair of first side walls 225, which extend at an angle from the edges of the at least one pair of first side walls 222, and extend toward each other to cover at least a portion of the additional functional component 52. Optionally, the at least one pair of first side walls 225 may be close to each other to substantially completely cover, for example, the side of the additional functional component 52 near the input terminal, thereby achieving better heat dissipation. The pair of first side walls near the output terminal may be spaced apart from each other to facilitate wiring at the output terminal. Similarly, the second heat sink 21 may also include at least one pair of second side walls 214, which extend at an angle from the edges of the at least one pair of second side walls 211, and extend toward each other to cover at least a portion of the leakage protection component 51. Similarly, alternatively, the at least one pair of second side walls 214 may be close to each other or spaced apart.

[0105] In an additional embodiment, the heat dissipation assembly may further include at least one heat-conducting element, which is disposed at a position corresponding to the heat-generating element on the first printed circuit board and / or the second printed circuit board, and contacts the heat-generating element and at least one heat dissipation element respectively to form a heat conduction path for transferring heat between the heat-generating element and the heat dissipation element.

[0106] As shown in Figures 3 and 4, two heat-conducting elements 24 are exemplaryly shown for the heating element 54 on the first printed circuit board 520. As described above, in some embodiments, the first printed circuit board 520 is provided with at least a rectifier, and advantageously, a heat-conducting element is provided on the surface of the rectifier. Depending on the needs, the heat-conducting element 24 may be selected from, for example, mica sheets, ceramic heat-conducting elements, metal heat-conducting elements combined with an insulating layer, thermally conductive silicone, thermally conductive putty, etc.

[0107] In some embodiments, the leakage current protection device may further include at least one insulating element 4, which is disposed between the heat dissipation assembly 2 and the non-heat-generating elements and / or conductive parts of the first printed circuit board 520 and / or the second printed circuit board 510 for isolation and insulation, so as to ensure the insulation strength between the heat dissipation assembly 2 and the first printed circuit board and / or the second printed circuit board. In the embodiments shown in Figures 3 and 4, the leakage current protection device includes a first insulating element 42 disposed between the first heat dissipation assembly 22 and the non-heat-generating elements of the first printed circuit board 520, and a second insulating element 41 disposed between the second heat dissipation assembly 21 and the non-heat-generating elements of the second printed circuit board 510.

[0108] Advantageously, the first insulating member 42 is adapted to at least a portion of the contour shape of the first heat sink 22, and / or the second insulating member 41 is adapted to at least a portion of the contour shape of the second heat sink 21, to provide a compact structural design. In the case of a thermally conductive member, at least one insulating member may have an opening through which at least one thermally conductive member contacts at least one heat sink. For example, as shown in FIG. 4, the first insulating member 42 has an opening 421 corresponding to the thermally conductive member 24. Advantageously, the opening 421 is adapted to the shape of the thermally conductive member 24.

[0109] Advantageously, the heat dissipation assembly may include a middle heat sink arranged within a middle layer support and close to the heat-generating elements of the first and / or second printed circuit boards, for enhancing heat dissipation for individual heat-generating elements. As shown in FIG5, for example, a middle heat sink 23 may be provided separately for the inductor coil 541 of the leakage current protection assembly 51. Specifically, the middle heat sink 23 has a middle layer base wall 232 parallel to the second printed circuit board 510, and at least a pair of middle layer sidewalls 233 extending perpendicularly from the edge of the middle layer base wall 232 and parallel to each other. The middle layer base wall 232 is arranged between the second printed circuit board 510 and the middle layer support 53, and the at least a pair of middle layer sidewalls 233 cover at least a portion of the heat-generating element (inductor coil 541) of the second printed circuit board 510.

[0110] Optionally, the middle heat sink 23 and the middle support 53 are fixedly connected by a snap-fit ​​structure and / or fasteners. For example, the middle heat sink 23 may be provided with a snap-fit ​​hole 231, which can snap with the support hook 532 on the middle support 53 to fix it to the middle support 53. In the illustrated embodiment, a support through hole 533 may be provided on the middle support 53 at a position corresponding to the inductor coil 541. A heat-conducting element 24 may be optionally provided in the support through hole 533. The heat-conducting element 24 contacts the inductor coil 541 and the middle heat sink 23 respectively to form a heat conduction path to transfer the heat of the inductor coil 541 to the middle heat sink 23. Furthermore, the heat dissipation portion formed by the middle sidewall 233 of the middle heat sink 23 can be close to the heat dissipation portions of the first heat sink 22 and the second heat sink 21 to form an effective heat dissipation path for the entire movement assembly 5.

[0111] In some embodiments, the middle layer heat sink may also include at least one pair of middle layer sidewalls. These at least one pair of middle layer sidewalls extend at an angle from the edges of the at least one pair of middle layer sidewalls or extend perpendicularly from the edges of the middle layer base wall and are connected to or spaced apart from the at least one pair of middle layer sidewalls. The at least one pair of middle layer sidewalls extend toward each other to cover at least a portion of the heat-generating element of the first or second printed circuit board. As shown in FIG5, the middle layer heat sink 23 includes a pair of middle layer sidewalls 234 extending perpendicularly from the edge of the middle layer base wall 232 and spaced apart from the at least one pair of middle layer sidewalls 233, for covering at least a portion of the inductor coil 541, thereby achieving better heat dissipation. Optionally, the at least one pair of middle layer sidewalls may be close to each other or spaced apart; the illustrated pair of middle layer sidewalls 234 are exemplary in that they are spaced apart from each other.

[0112] Specifically, regarding the leakage current protection component 51, referring to Figures 6 to 7C, in some embodiments, the leakage current protection component 51 includes at least a detection component and a circuit breaking component. The detection component detects the leakage current signal at the output terminal, and the circuit breaking component disconnects the power supply circuit in response to the leakage current signal. It should be understood that the circuit breaking component can be any form capable of disconnecting the power supply circuit between the input and output terminals, and can also be referred to as a switching element, such as, but not limited to, contact arms that achieve switching through contacts.

[0113] In the illustrated embodiment, the detection component 511 may include a detection magnetic ring 5110, which has an inner hole and is coupled to the second printed circuit board 510. The detection magnetic ring 5110 is used to detect leakage current signals of the power circuit passing through the inner hole and transmit them to the second printed circuit board 510. The circuit breaker component may include an input stationary contact component 513 coupled to the input terminal and an output moving contact component 521 passing through the inner hole of the detection magnetic ring 5110 and coupled to the output terminal. The input stationary contact component 513 has an electrostatic contact and is coupled to the pin 32 via a current-carrying core wire 31. The output moving contact component 521 has a moving contact and passes through the inner hole of the detection component 511 and is coupled to the output power line component 14. The circuit breaker component disconnects the power connection between the input stationary contact component 513 and the output moving contact component 521 in response to a leakage current signal. The leakage protection component 51 also includes an operating element linked to the circuit breaker component. The operating element includes a reset element 514 and a tripping element 518 to switch the input stationary contact component 513 and the output moving contact component 521 between a closed state and an open state. That is, the output moving contact component 521 can be driven by the operating element to close and connect with the input stationary contact component 513 or to separate and disconnect from the input stationary contact component 513 due to its own elastic deformation and rebound force.

[0114] Referring specifically to Figure 6, the reset element 514 is constructed in the form of a reset rod. One end of the reset rod is the reset plate head end 5141, which can be adapted to the reset button 11 (Figure 2) protruding from the upper housing 10. The other end of the reset rod abuts against one end of the reset spring 519, and the other end of the reset spring 519 abuts against the middle layer bracket 53, which provides an upward rebound force to the reset element 514. In some embodiments, the operating element also includes a test element, which is coupled to the second printed circuit board 510 and is used to generate a simulated leakage current signal. As shown in Figure 2, the test element includes a test button 12. In some embodiments, the leakage current protection device may also include a status indicator 13, which is made of a light-transmitting material and arranged between the second printed circuit board 510 and the housing (upper housing 10) to allow for direct observation of the working status of the leakage current protection device from the outside of the housing.

[0115] Returning to Figure 6, in the embodiment shown, the tripping element 518 is combined with the tripping coil assembly 512. The tripping coil assembly 512 includes a hollow winding post 5121, on the outside of which a coil winding coupled to the second printed circuit board 510 is wound. A tripping core 516 is placed in the inner hole of the hollow winding post 5121. The head end of the tripping core 516 is engaged with the tripping element 518, and the tail end of the tripping core 516 abuts against one end of the core spring 515. The other end of the core spring 515 abuts against the side of the spring baffle 517. The spring baffle 517 is inserted into and fixed to the end of the inner hole of the hollow winding post 5121. The tripping element 518 comprises a tripping notch 5182, a tripping latch 5183, and a tripping lifting arm 5181. The tripping notch 5182 engages with the head end of the tripping core 516 and can move with the tripping core 516. Correspondingly, the reset element 514 has a reset latch 5142 on the side of the reset rod to engage or disengage with the tripping latch 5183. The tripping lifting arm 5181 is adapted to contact the output moving contact assembly 521 to switch the input stationary contact assembly 513 and the output moving contact assembly 521 between a closed and open state. It should be understood that the illustrated structures of the reset element 514 and the tripping element 518 are merely examples; depending on different needs, the above structures can be varied to obtain similar reset and tripping functions.

[0116] Referring to Figures 7A to 7C, in the initial state, as shown in Figure 7A, the core spring 515 is compressed and applies a restoring force to the tripping core 516. Consequently, the tripping core 516, under the elastic force of the core spring 515, causes the tripping latch 5183 to apply a holding force towards the reset member 514 to the tripping member 518, tending to engage with the reset latch 5142 of the reset member 514. When the reset button 11 is pressed, the linkage reset member 514 moves downward and compresses the reset spring 519 until the tripping latch 5183 of the tripping member 518 engages with the reset latch 5142 of the reset member 514, as shown in Figure 7B. At this time, when the reset button 11 is released, the reset component 514 will drive the trip component 518 and drive the output moving contact assembly 521 to move upward together under the action of the return force of the reset spring 519, forcing the output moving contact assembly 521 to undergo elastic deformation until the output moving contact assembly 521 and the input stationary contact assembly 513 are connected and closed, as shown in Figure 7C.

[0117] When the detection component 511 detects a leakage current signal, the trip coil component 512 responds to the control of the second printed circuit board 510, is powered on, and generates a magnetic field to drive the trip core 516 to compress the core spring 515 and pull the trip member 518. This causes the trip latch 5183 of the trip member 518 to separate from the reset latch 5142 of the reset component 514. At this time, the trip lifting arm 5181 of the trip member 518 moves downward back to its initial position under the action of the deformation and rebound force of the output moving contact component 521. The output moving contact component 521 separates from the input stationary contact component 513, as shown in Figure 7A, thereby realizing leakage protection.

[0118] Figures 8 to 13B illustrate a leakage current protection device according to another embodiment of the present disclosure, wherein components similar to those in the above embodiments are shown with the same reference numerals, and for the sake of brevity, the description of similar components will not be repeated.

[0119] In this embodiment, the heat-generating elements on the first printed circuit board 520 and the second printed circuit board 510 are arranged in the same direction. The heat sink can be a middle heat sink 23 arranged on the middle layer support 53, and for example, arranged close to the first printed circuit board 520. The middle heat sink 23 can be constructed as a generally plate-shaped part, and has a middle layer base wall 232 parallel to the first printed circuit board 520 and a pair of middle layer side walls 233 that are bent vertically in opposite directions from the edge of the middle layer base wall 232 and extend parallel to each other to form a heat dissipation portion for heat dissipating heat from the heat-generating elements on the first printed circuit board 520 and the second printed circuit board 510, respectively.

[0120] In this embodiment, the middle layer heat sink 23 and the middle layer support 53 are fixedly connected, for example, by fasteners and may include a middle layer insulator 43. The middle layer insulator 43 may be arranged between the first printed circuit board 520 and the middle layer heat sink 23, and may be fixed to the middle layer support 53 together with the middle layer heat sink 23 by fixing screws 50. In addition, the middle layer support 53 may be provided with conductive post vias 502, through which conductive posts 20 pass, and with their two ends connected to the first printed circuit board 520 and the second printed circuit board 510 respectively, to realize the electrical connection between the two circuit boards.

[0121] Depending on the specific needs, the reset button 11 and the test button 12 can be assembled with the status indicator 13 to form a button assembly 400, as shown in Figure 8. Accordingly, the upper housing 10 is provided with guide holes 102 for the reset button 11 and the test button 12 to protrude, so as to facilitate the operation of the reset component and the test component. In the case where the status indicator 13 is present, the guide holes 102 are also used to expose the status indicator 13.

[0122] According to this disclosure, the leakage current protection device may further include a wire clamping assembly 600, as shown in the embodiment of FIG8. The wire clamping assembly 600 is used to fix the output power cord inside the housing and is configured to move only along the insertion direction of the pin 32 to facilitate the assembly and fixing of the power cord. Specifically, the wire clamping assembly 600 is arranged inside the housing and adjacent to the output end through hole 101 of the housing. The output power cord assembly 14 of the leakage current protection device may also be provided with a power cord bending buffer device 720, which has a snap-fit ​​protrusion 721 that can pass through the output end through hole 101 of the housing and be fixedly engaged with the wire clamping assembly 600.

[0123] In some embodiments, the wire clamping assembly 600 may include a first wire clamping block 610 and a second wire clamping block 620 arranged opposite to each other along the insertion direction of the pins. The first wire clamping block 610 is provided with a first notch, as exemplarily shown in FIG. 13A. The second wire clamping block 620 is provided with a second notch, as exemplarily shown in FIG. 621 and 622, thereby securing the snap-fit ​​protrusion 721 between the two first notches 611 and 612 and between the two second notches 621 and 622. The first wire clamping block 610 and the second wire clamping block 620 may be fixed to each other by wire clamping screws 630, as exemplarily shown in FIG. 12, with screw holes 623 arranged on the second wire clamping block 620.

[0124] Advantageously, the first and / or second notches are provided with bevels. For example, as shown in the figure, the corresponding first notch 611 and second notch 621 are respectively provided with bevels. When the two wire clamping blocks are fastened by the wire clamping screws 630, the bevels can engage with the snap-fit ​​protrusion 721 of the power cord bending buffer device 720, and make the power cord bending buffer device 720 fit against the edge of the output end through hole 101 of the upper housing 10, further realizing the stable connection of the wire clamping assembly to the power cord. In addition, the combination of the two notches can engage with the outer sheath of the output power cord and compress and deform the outer sheath of the power cord, so that it is relatively fastened to the wire clamping assembly and the housing.

[0125] In some embodiments, a cable management block 503 may also be provided on the middle support 53 for bending the power cord. Also referring to Figures 12 to 13B, the cable management block 503 is arranged close to the output power cord assembly 14, and optionally also includes a cable baffle 504, with the cable management block 503 mounted on the cable baffle 504. In this way, the cable baffle 504 separates the internal space of the housing into a relatively independent cable storage space, which is beneficial for the positioning and protection of the power cord. When the output power cord assembly 14 is assembled and the chassis assembly 5 is installed into the upper housing 10, the output power cord inside the housing can be organized into a U-shape 710 by the cable management block 503, and then slid in and fixed in the cable storage space along with the chassis assembly 5.

[0126] Figures 14 to 17 illustrate a leakage current protection device according to another embodiment of the present disclosure. Similarly, components similar to those in the above embodiments are shown with the same reference numerals, and for the sake of brevity, descriptions of similar components will not be repeated.

[0127] In this embodiment, the pin 32 of the input terminal has a different configuration than that in the above embodiments, but it is still fixed to the lower housing 30. Due to the different configuration of the pin 32, the through holes 342 for the pin 32 to extend from the lower housing cover plate 34 and the through holes 332 for the pin 32 to extend from the adhesive sheet 33 have correspondingly different configurations. The difference from the embodiments shown in Figures 2 to 5 is that the heat dissipation assembly 2 in this embodiment includes only one heat dissipation element, namely the first heat dissipation element 22 arranged between the first printed circuit board 520 and the inner surface of the housing (lower housing 30), and the first sidewall 222 of the first heat dissipation element 22 extends to cover most of the entire body of the mechanism assembly 5, for example, to a position that is approximately parallel to the second printed circuit board 510, so as to still achieve effective heat dissipation for the entire mechanism assembly. Accordingly, in this embodiment, the first heat sink 22 can be directly fixedly connected to the middle layer bracket 53. For example, as shown in Figure 16, the middle layer bracket 53 can be provided with a hook 532, and the first heat sink 22 can be provided with a corresponding slot 224, so that the two can be fixedly connected by a snap-fit.

[0128] The working principle of the leakage current protection device according to the present disclosure is summarized below with reference to Figure 18.

[0129] Figure 18 illustrates the leakage current protection components and additional functional components in modular sections, including leakage current protection module A, electromagnetic compatibility module B, power conversion module C, and switch control module D. Under normal operating conditions, when leakage current exists at the output terminals (live wire L, neutral wire N), the trip coil assembly of leakage current protection module A receives a large current to generate a magnetic field, driving the trip element to move and disconnecting the power connection between the input and output terminals to achieve leakage current protection.

[0130] For additional functions, the electromagnetic compatibility module B can reduce electromagnetic interference (EMI) and improve electromagnetic compatibility (EMC) in the circuit through components such as capacitors and inductors. The power conversion module C can convert external AC or DC current (such as EC+) at the input terminal into a regulated or converted DC output (such as VCC) through rectifiers, voltage regulators, and other components, improving the stability of the DC output voltage. This ensures circuit safety while reducing EMC conducted interference signals, thereby reducing interference to the transformer circuit, ensuring less interference to the leakage current protection device during operation, resulting in a more accurate DC output voltage with smaller errors, and thus better leakage current protection. The switch control module D can be used to control the switching state of the circuit, allowing the circuit to be controlled by receiving external control signals (such as CTL).

[0131] Through the above-mentioned layout optimization design, the leakage current protection device disclosed herein, in addition to the leakage current protection function, also adds power conversion, electromagnetic compatibility, and switch control functions within a limited housing space, which is in line with the trend of increasingly higher integration of electrical appliances. At the same time, by providing heat dissipation components and optimizing the structure and arrangement of the heat dissipation components according to different needs, it is beneficial to heat dissipation of heat-generating components, providing users with a richer and safer and more reliable integrated solution for leakage current protection products.

[0132] It should be understood here that the embodiments shown in the figures only illustrate the optional shapes, sizes and arrangements of the various optional components of the leakage current protection device according to the present disclosure; however, they are merely illustrative and not limiting. Other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present disclosure.

[0133] The technical content and features of this disclosure have been disclosed above. However, it is understood that those skilled in the art can make various changes and improvements to the above-disclosed concept under the inventive concept of this disclosure, but all such changes and improvements fall within the protection scope of this disclosure. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of this disclosure is determined by the claims.

Claims

1. An electric leakage protection device with additional functions, comprising a housing, an input end for coupling a power source, an output end for coupling a load end, and a movement assembly arranged in the housing, the input end is attached to the lower surface of the housing, characterized in that, The movement assembly includes at least: A first printed circuit board and a second printed circuit board, wherein the first printed circuit board and the second printed circuit board are stacked parallel to each other, and the component surfaces of the first printed circuit board and the second printed circuit board are parallel to the lower surface of the housing. The leakage current protection component includes at least a trip coil assembly and a detection magnetic ring to detect the leakage current signal at the output terminal; An additional functional component, coupled to the leakage current protection component and including at least one of the first printed circuit board and the second printed circuit board, to implement at least one load-side function. A heat dissipation assembly is provided between the first printed circuit board and / or the second printed circuit board and the housing, and / or between the first printed circuit board and the second printed circuit board.

2. The ground fault protection device with additional functions according to claim 1, characterized in that, The heat dissipation component is arranged adjacent to the heat-generating elements on the first printed circuit board and / or the second printed circuit board, and is used to dissipate heat from the heat-generating elements.

3. The ground fault protection device with additional functions according to claim 2, characterized in that, The heating element on the first printed circuit board and the heating element on the second printed circuit board are arranged in opposite directions and facing the inner surface of the housing.

4. The ground fault protection device with additional functions according to claim 1, characterized in that, The heat dissipation assembly includes at least one heat sink having a base wall parallel to the first printed circuit board or the second printed circuit board, and at least a pair of side walls extending perpendicularly from the edge of the base wall and parallel to each other. The base wall is at least disposed between the first printed circuit board or the second printed circuit board and the inner surface of the housing, and the at least a pair of side walls cover at least a portion of the movement assembly.

5. The ground fault protection device with additional functions according to claim 4, characterized in that, The heat sink further includes at least one pair of side walls, which extend at an angle from the edges of the at least one pair of side walls or extend perpendicularly from the edges of the base wall and are connected to or spaced apart from the at least one pair of side walls, and the at least one pair of side walls extend toward each other to cover at least a portion of the movement assembly.

6. The ground fault protection device with additional functions according to claim 5, characterized in that, The at least one pair of side walls are close to each other or form a gap.

7. The ground fault protection device with additional functions according to claim 4, characterized in that, The heat dissipation assembly further includes at least one heat-conducting element, which is disposed at the position of the heat-generating element on the first printed circuit board and / or the second printed circuit board, and contacts the heat-generating element and the at least one heat dissipation element respectively to form a heat conduction path.

8. The ground fault protection device with additional functions according to claim 7, characterized in that, The leakage protection device further includes at least one insulating element, which is disposed between the at least one heat sink and the non-heat-generating elements of the first printed circuit board and / or the second printed circuit board for isolation and insulation.

9. The ground fault protection device with additional functions according to claim 8, characterized in that, The at least one insulating element is adapted to at least a portion of the contour shape of the at least one heat sink.

10. The ground fault protection device with additional functions of claim 8, wherein, The at least one insulating member has an opening, and the at least one heat-conducting member contacts the at least one heat-dissipating member through the opening.

11. The ground fault protection device with additional functions according to claim 10, characterized in that, The opening is adapted to the shape of the at least one heat-conducting element.

12. The ground fault protection device with additional functions according to claim 1, characterized in that, The heat dissipation assembly has a first base wall parallel to the first printed circuit board or the second printed circuit board, and at least a pair of side walls extending perpendicularly from the edge of the first base wall and parallel to each other. The first base wall is disposed between the first printed circuit board and the inner surface of the housing. The heat dissipation assembly also has a second base wall parallel to the first base wall. The second base wall is disposed between the second printed circuit board and the inner surface of the housing. The at least a pair of side walls cover at least a portion of the additional functional component.

13. The ground fault protection device with additional functions of claim 12, wherein, The heat dissipation assembly includes at least a first heat dissipation component and a second heat dissipation component. Furthermore, the first heat sink includes at least the first base wall, and the second heat sink includes at least the second base wall.

14. The leakage current protection device with additional functions according to claim 13, characterized in that, The first heat sink has at least one pair of first sidewalls that extend vertically from the edge of the first base wall and are parallel to each other; The second heat sink has at least one pair of second sidewalls that extend vertically from the edge of the second base wall and are parallel to each other.

15. The ground fault protection device with additional functions of claim 14, wherein, The first heat sink and the second heat sink are connected to each other and cover at least a portion of the movement assembly.

16. The ground fault protection device with additional functions of claim 15, wherein, The first heat sink and the second heat sink are fixedly connected by a snap-fit ​​structure disposed on the at least one pair of first sidewalls and the at least one pair of second sidewalls.

17. The ground fault protection device with additional functions of claim 14, wherein, The at least one pair of first sidewalls of the first heat sink and the at least one pair of second sidewalls of the second heat sink partially overlap.

18. The ground fault protection device with additional functions of claim 14, wherein, The first heat sink further includes at least one pair of first sidewalls, which extend at an angle from the edges of the at least one pair of first sidewalls or extend perpendicularly from the edges of the first base wall and are connected to or spaced apart from the at least one pair of first sidewalls. The at least one pair of first sidewalls extend toward each other to cover at least a portion of the additional functional component, and / or The second heat sink further includes at least one pair of second side walls, which extend at an angle from the edges of the at least one pair of second side walls or extend perpendicularly from the edges of the second base wall and are connected to or spaced apart from the at least one pair of second side walls, and the at least one pair of second side walls extend toward each other to cover at least a portion of the leakage protection assembly.

19. The ground fault protection device with additional functions of claim 18, wherein, The at least one pair of first side walls are close to each other or form a gap, and / or the at least one pair of second side walls are close to each other or form a gap.

20. The ground fault protection device with additional functions of claim 13, wherein, The leakage protection device includes a first insulating member disposed between the first heat sink and the non-heat-generating element of the first printed circuit board, and a second insulating member disposed between the second heat sink and the non-heat-generating element of the second printed circuit board.

21. The ground fault protection device with additional functions of claim 20, wherein, The first insulating member is adapted to at least a portion of the contour shape of the first heat sink, and / or the second insulating member is adapted to at least a portion of the contour shape of the second heat sink.

22. The arc fault circuit interrupter with additional functions of any of claims 1 to 21, wherein, The leakage current protection device also includes a middle layer bracket, which is arranged between the leakage current protection component and the additional functional component, and the heat dissipation component is fixed to the middle layer bracket.

23. The ground fault protection device with additional functions of claim 22, wherein, The heat dissipation component and the middle layer bracket are fixedly connected by a snap-fit ​​structure and / or fasteners.

24. The ground fault protection device with additional functions of claim 22, wherein, The heat dissipation assembly includes a middle heat dissipation component, which is arranged within the middle layer support and close to the heat-generating elements of the first printed circuit board and / or the second printed circuit board.

25. The ground fault protection device with additional functions of claim 24, wherein, The middle heat sink has a middle base wall parallel to the first printed circuit board or the second printed circuit board, and at least one pair of middle side walls extending vertically from the edge of the middle base wall and parallel to each other. The middle base wall is arranged between the first printed circuit board or the second printed circuit board and the middle support. The at least one pair of middle side walls covers at least a portion of the heat-generating elements of the first printed circuit board and / or the second printed circuit board.

26. The ground fault protection device with additional functions of claim 25, wherein, The middle heat sink further includes at least one pair of middle side walls, which extend at an angle from the edges of the at least one pair of middle side walls or extend perpendicularly from the edges of the middle base wall and are connected to or spaced apart from the at least one pair of middle side walls. The at least one pair of middle side walls extend toward each other to cover at least a portion of the heat-generating element of the first printed circuit board or the second printed circuit board.

27. The ground fault protection device with additional functions of claim 26, wherein, The at least one pair of middle-layer side walls are close to each other or form a gap.

28. The arc fault circuit interrupter with additional functions of claim 24, wherein, The leakage protection device further includes a heat-conducting component disposed between the middle heat sink and the heating element of the first printed circuit board and / or the second printed circuit board, wherein the heat-conducting component contacts the heating element and the middle heat sink respectively to form a heat conduction path.

29. The ground fault protection device with additional functions of claim 22, wherein, The middle layer support is equipped with cable management blocks for bending the output power cord.

30. The ground fault protection device with additional functions of claim 29, wherein, The middle layer support is also provided with a cable baffle, and the cable management block is disposed on the cable baffle.

31. The arc fault circuit interrupter with additional functions of any one of claims 1 to 21, wherein, The heat dissipation component is integrally formed from a plate-shaped part by stamping.

32. The arc fault detection and location device of any one of claims 1-21, wherein, The leakage current protection device includes at least four independent current-carrying core wires, and the leakage current protection component detects the leakage current signal on the current-carrying core wires.

33. The ground fault protection device with additional functions of claim 32, wherein, The first printed circuit board and the second printed circuit board are electrically connected via current-carrying core wires or conductive posts.

34. The arc fault circuit interrupter with additional functions of claim 32, wherein, The input terminal includes at least two pins extending out of the housing, the first printed circuit board and the second printed circuit board are arranged perpendicular to the insertion direction of the pins, wherein the pins are coupled to the first printed circuit board or the second printed circuit board via current-carrying core wires.

35. The arc fault circuit interrupter with additional functions of claim 34, wherein, The housing includes at least an upper housing and a lower housing. The upper housing has an output terminal through hole for accommodating the output power line, and the plug is fixed to the lower housing.

36. The arc fault circuit interrupter with additional functions of claim 35, wherein, The first printed circuit board is located away from the input terminal relative to the second printed circuit board, and the heat dissipation assembly is disposed at least between the inner surface of the first printed circuit board and the upper housing; or The first printed circuit board is closer to the input terminal than the second printed circuit board, and the heat dissipation component is arranged at least between the inner surface of the first printed circuit board and the lower housing.

37. The arc fault circuit interrupter with additional functions of claim 35, wherein, The lower housing and the upper housing are fixedly connected by fasteners.

38. The arc fault detection device with additional functionality of claim 35, wherein, The housing also includes a lower housing cover plate, which is fixedly connected to the lower housing and covers the lower housing. The lower housing cover plate is provided with a through hole for the prong to extend out.

39. The ground fault protection device with additional functions of claim 38, wherein, The lower housing cover plate is fixedly connected to the lower housing by a snap-fit ​​structure and / or fasteners and / or adhesives.

40. The arc fault circuit interrupter of claim 39, wherein the additional function is a ground fault protection function. The lower housing cover plate is fixedly connected to the lower housing by an adhesive sheet. The adhesive sheet has through holes for the prongs to extend and snap-fit ​​holes, and the lower housing cover plate has corresponding snap hooks.

41. The additional function-equipped ground fault protective device according to claim 35, wherein The leakage protection device further includes a wire clamping assembly for fixing the output power line inside the housing and configured to move only along the insertion direction of the pin.

42. The additional function-equipped ground fault protective device according to claim 40, wherein The leakage protection device is also equipped with a power cord bending buffer device, which has a snap-fit ​​protrusion that passes through the output end through hole of the housing and is fixedly engaged with the wire clamping assembly.

43. The arc fault circuit interrupter with additional functions of claim 42, wherein, The wire clamping assembly includes a first wire clamping block and a second wire clamping block arranged opposite to each other along the insertion direction of the pin. The first wire clamping block is provided with a first notch, and the second wire clamping block is provided with a second notch. The first notch and / or the second notch is provided with a bevel, and the bevel engages with the snap-fit ​​protrusion of the power cord bending buffer device.

44. The additional function-equipped ground fault interrupter device according to claim 32, wherein The load-side functions include at least power conversion functions and / or electromagnetic compatibility filtering functions and / or switching control functions.

45. The arc fault circuit interrupter with additional functionality of claim 44, wherein, The first printed circuit board is provided with at least one rectifier device for converting the AC power supply connected to the input terminal into DC power supply.

46. The arc fault detection device with additional functionality of claim 45, wherein, At least two of the current-carrying core wires are coupled to the rectifier device.

47. The arc fault circuit interrupter with additional functionality of claim 45, wherein, The rectifier device includes at least a diode or a rectifier bridge.

48. The additional function-equipped electric leakage protective device according to claim 45, wherein The surface of the rectifier is provided with a heat-conducting component.

49. The arc fault circuit interrupting device with additional functionality of any one of claims 1 to 21, wherein, The leakage current protection component includes at least a detection component and a circuit breaking component. The detection component detects the leakage current signal at the output terminal, and the circuit breaking component disconnects the power supply circuit in response to the leakage current signal.

50. The arc fault circuit interrupter with additional functionality of claim 49, wherein, The detection component includes a detection magnetic ring, which has an inner hole and is coupled to the first printed circuit board or the second printed circuit board. The detection magnetic ring is used to detect the leakage current signal of the power circuit passing through the inner hole and transmit it to the first printed circuit board or the second printed circuit board.

51. The arc fault detection device with additional functionality of claim 50, wherein, The circuit breaker assembly includes an input stationary contact assembly coupled to the input terminal and an output moving contact assembly passing through the inner hole of the detection magnetic ring and coupled to the output terminal, wherein the circuit breaker assembly disconnects the electrical connection between the input stationary contact assembly and the output moving contact assembly in response to the leakage current signal.

52. The arc fault circuit interrupter of claim 51, wherein the additional function is a ground fault protection function. The leakage protection component includes an operating element that is linked to the circuit breaking component. The operating element includes a reset element and a tripping element to switch the input stationary contact component and the output moving contact component between a closed state and an open state.

53. The arc fault circuit interrupter with additional functions of claim 52, wherein, The operating component also includes a test component, which is coupled to the first printed circuit board or the second printed circuit board and is used to generate a simulated leakage current signal.

54. The arc fault detection and location device with additional functionality of any one of claims 1 to 21, wherein, The leakage protection device also includes a status indicator, which is made of a light-transmitting material and is arranged between the first printed circuit board or the second printed circuit board and the housing.

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