Leakage protection device

Abstract

The present invention provides a leakage protection device, comprising a shell and a movement component arranged in the shell, the movement component comprising a control circuit board, and an input component, an output component and a trip component coupled to the control circuit board, the trip component comprising a trip coil component coupled to the control circuit board, the contact arm of the input component and the contact arm of the output component are fixed via the trip coil component to couple with the control circuit board; the leakage protection device also includes an indication component, the indication component includes an active identification part that cooperates with the trip component, and an indication part that penetrates to the outside of the shell, so that the indication component displays in real time the state of the trip component connecting or disconnecting the input component and the output component. The leakage protection device of the present invention can reduce the overall size of the product and allow the user to know the working state of the leakage protection device in real time, thereby ensuring the safety of the product. The leakage protection device is widely used, especially suitable for compact application environments.

Description

Technical Field

[0001] The present invention generally relates to the electrical field, and in particular to a leakage protection device. Background Art

[0002] As people's awareness of electricity safety continues to improve, the use of leakage protection devices is becoming more and more widespread. The application fields and places of use are also continuously increasing, which puts higher requirements on the research and development and manufacturing of leakage protection devices. Taking the leakage protection plug as an example, the existing leakage protection plug is relatively large in size due to the limitation of the mechanical structure. When it needs to be used with some small household appliances (such as hair dryers, dryers, etc.), it will cause the overall appearance of the product to be inconsistent, reducing the overall aesthetics of the product. In addition, due to the large size of the existing leakage protection plug, it will not be able to be used normally under some limited conditions (such as in the standard socket waterproof box in the bathroom), which will cause certain troubles to the user. In addition, due to the complex structure and large size of the existing leakage protection plug, it also makes the product difficult to manufacture and the cost is high. Therefore, it is urgent to design a small-sized leakage protection device. While considering the size reduction, it is also necessary to develop and design a new leakage protection device to meet various safety requirements, such as real-time monitoring of the working status of the leakage protection device. Summary of the invention

[0003] The purpose of the present invention is to provide a leakage protection device, to make improvements based on the above-mentioned factors to be considered, and to further improve the safety of use.

[0004] To this end, according to the present invention, there is provided a leakage protection device, comprising a shell and a movement component arranged in the shell, the movement component comprising a control circuit board, and an input component, an output component and a trip component coupled to the control circuit board, wherein the trip component comprises a trip coil component coupled to the control circuit board, and the contact arm of the input component and the contact arm of the output component are fixed by the trip coil assembly to be coupled to the control circuit board; the leakage protection device also comprises an indication component, the indication component comprises an active identification member that cooperates with the trip assembly, and an indication member that passes through the outside of the shell, so that the indication component displays in real time the state of the trip assembly connecting or disconnecting the input assembly and the output assembly.

[0005] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0006] In certain optional forms, the input component includes a pair of contact arms, each contact arm is provided with an electrostatic contact, the output component includes a pair of elastic contact arms, each elastic contact arm is provided with a moving electric contact to cooperate with the electrostatic contact, the trip assembly is provided with a tripper that causes the moving electric contact to contact or disengage with the electrostatic contact, and the movable identification member is configured to cooperate with the tripper.

[0007] In some optional forms, the movable identification member is configured to be rod-shaped, including a clamping portion clamped to the release and an identification end extending to be adjacent to the indicator member, and the identification end has a flat surface.

[0008] In certain optional forms, at least the identification end of the movable identification member has an indicating color.

[0009] In some optional forms, the indicator member is made of a transparent material and is provided with a light-guiding inclined surface corresponding to the identification end of the movable identification member.

[0010] In certain optional forms, the leakage protection device further includes a detection coil assembly coupled to the control circuit board, and the trip coil assembly is provided with a coupling structure for receiving and fixing the detection coil assembly.

[0011] In some optional forms, the detection coil assembly is provided with a hole for the connecting wire of the input assembly to pass through, so that the input assembly is coupled to the control circuit board.

[0012] In some optional forms, the housing includes a housing base and a housing cover connected to each other, the input component and the output component extend out of the housing base, and the housing cover is provided with a hole for the indication component to be embedded.

[0013] In some optional forms, the housing seat and the housing cover are connected by threaded fasteners, wherein the housing is further provided with a shielding cover to cover the exposed portion of the threaded fasteners.

[0014] The leakage protection device of the present invention can reduce the overall size of the product and enable the user to know the working status of the leakage protection device in real time by improving the structural layout and providing an indication component, thereby ensuring the safety of product use. The indication component is designed as a mechanical moving part that cooperates with the trip component, which can optimize the layout, facilitate assembly, reduce costs, and improve production and processing efficiency. The leakage protection device is widely used, especially in compact application environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features and advantages of the present invention will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar components, wherein:

[0016] Figure 1 A schematic diagram of the appearance of a leakage protection device according to an embodiment of the present invention;

[0017] Figure 2 This is an exploded schematic diagram of the leakage protection device;

[0018] Figure 3 It is a disassembled schematic diagram of the movement components in the leakage protection device;

[0019] Figure 4A It is a schematic diagram of the state of the leakage protection device when the power is turned on, showing the upward moving identification rod;

[0020] Figure 4B It is a schematic diagram of the state of the leakage protection device when the power supply is disconnected, showing the downward moving identification rod;

[0021] Figure 5A It is an exploded schematic diagram of a tripping coil assembly and a detection coil assembly in a leakage protection device;

[0022] Figure 5B It is a schematic diagram of the assembly of the tripping coil assembly and the detection coil assembly in the leakage protection device;

[0023] Figure 6 The figure is a schematic diagram of the circuit principle of a leakage protection device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary of specific ways to implement and use the present invention, and are not intended to limit the scope of the present invention. When describing the structural positions of the various components, such as up, down, top, bottom, etc., the expressions of directions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.

[0025] In this document, the terms "coupling", "connection" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "coupling" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this document can be understood according to specific circumstances.

[0026] In the illustrated embodiment, a plug is taken as an example, but it should be understood that any other leakage protection device applicable to the concept of the present invention is not excluded.

[0027] See first Figure 1The leakage protection device of the present invention comprises a housing and a core assembly disposed in the housing. The housing may comprise a housing base 1 and a housing cover 2 connected together by a plurality of fasteners or mechanical structure buckles, wherein an input assembly 5 and an output assembly 6 extend out of the housing base 1, respectively. In the illustrated embodiment, the fasteners may be threaded fasteners, such as Figure 2 21A, 21B are shown as examples in the figure. For beautification, a shielding cover 22 may also be provided to cover the exposed portion of the screw after assembly.

[0028] Combination Figure 2 and Figure 3 As shown, the movement assembly 9 includes a control circuit board 91, and the input assembly 5 and the output assembly 6 are coupled to the control circuit board 91, thereby realizing electrical connection between the input end and the output end. Figure 2 In the embodiment shown, the input assembly includes plug pins 51 and 52, which extend out of the housing seat 1 of the housing along a first direction D1, and the output assembly 6 includes an output wiring device, which extends out of the housing seat 1 of the housing along a second direction D2, and the second direction D2 is at an angle to the first direction D1. However, it is also feasible that the second direction D2 is parallel to the first direction D1, and similarly, the input assembly 5 and the output assembly 6 can also extend out of the housing cover of the housing, or extend out of the housing cover and the housing seat respectively, so that the leakage protection device can be applied to more application environments.

[0029] In the leakage protection device, the input component 5 also includes a pair of contact arms for connecting to the power supply. It should be understood that the input component can be other similar electrical coupling structures, optionally a neutral line (N) contact arm 96A and a live line (L) contact arm 96B connected to the plug pins 51 and 52 through the plug connection wires 51A and 52A, and each contact arm is provided with an electrostatic contact. Correspondingly, the output component 6 includes a pair of output moving contact arms connected to the output wiring device, optionally an N moving contact arm 97A and an L moving contact arm 97B coupled to the control circuit board 91, wherein the output connection wires 61A and 62A are coupled to the connection wire welding holes 61B and 62B on the control circuit board 91, as shown in FIG. Figure 2 As shown in , each moving contact arm is provided with a moving electric contact to cooperate with the electrostatic contact to form a switch. In the illustrated embodiment, the output assembly 6 may also include a wire card 63 connected to the housing and extending outside the housing. The output wiring device realizes the electrical connection of the leakage protection device via the wire card 63, and has waterproof performance and improves the anti-bending performance and service life of the output wiring device. It should be understood here that the output wiring device and / or the plug pin can be replaced by a wiring assembly device that the user can freely connect to the power supply end or the load end.

[0030] According to the present invention, the leakage protection device includes a tripping assembly and a detection coil assembly 95 coupled to a control circuit board 91, wherein the tripping assembly may include a tripper 98 that causes the moving electric contact to contact or disengage with the electrostatic contact, and a tripping coil (SOL) assembly 94 coupled to the control circuit board 91.

[0031] The tripper 98 is provided with tripping arms 98A and 98B for lifting the N moving contact arm 97A and the L moving contact arm 97B respectively. The pair of contact arms of the input assembly 5 and the pair of elastic contact arms of the output assembly 6 are fixed and limited via the tripping coil assembly 94 to couple with the control circuit board 91. Specifically, Figure 2 and Figure 3 As can be seen in the figure, a pair of contact arms of the input assembly 5 and a pair of elastic contact arms of the output assembly 6 are connected to the welding holes on the control circuit board 91 through the corresponding positioning holes on the trip coil assembly 94. In this way, the layout space inside the product is effectively optimized, and the parts used to install the input assembly and the output assembly are reduced, so that the overall structural size of the product can be greatly reduced.

[0032] According to the present invention, the leakage protection device includes an indicator assembly, which includes an active identification member 7 that cooperates with the release 98 and an indicator member 8 that penetrates the outside of the housing, so as to display to the user in real time whether the release assembly is connected or disconnected to the input assembly and the output assembly. In the illustrated embodiment, the active identification member 7 can be configured as a rod, including a clamping portion that is clamped to the release 98 and an identification end that can pass through the control circuit board 91 and extend to the adjacent indicator member 8, wherein the clamping portion is, for example, Figure 3 The card slot 7C shown in the figure is used to be snapped in the part 98C of the tripper 98 that does not conflict with the tripping arm that implements the lifting action, and the identification end can have a flat surface to facilitate the visual transmission of the indicator 8. In order to facilitate the prominent display, the indicator is preferably made of a transparent material and is provided with a light guiding inclined surface 81 corresponding to the identification end of the movable identification member 7, such as Figure 4A As shown, the inclined surface can be selected to be, for example, inclined at 45 degrees. At the same time, at least the identification end of the movable identification member 7 has an indicator color, for example, coated with red, so that the color of the movable identification member 7 can be clearly observed through the indicator 8 outside the housing, which is convenient for judging whether the leakage protection device is connected or disconnected from the power supply. This will be further understood in the following description.

[0033] In some embodiments, the leakage protection device further includes a reset (RESET) component and a test (TEST) component, wherein the reset component is used to control the movement component to be powered on and includes a reset button 3 disposed outside the housing, and the test component is used to simulate the leakage current test and includes a test button 4 disposed outside the housing. Figure 1 and Figure 2As can be seen in the figure, the housing cover 2 is provided with an opening for the reset button 3 and the test button 4 to protrude, and a hole is provided on the surface for the indicator 8 of the indicator assembly to be embedded. In the illustrated embodiment, the reset button 3 and the test button 4 are both configured to have a substantially circular shape and have different sizes. In some embodiments, the reset button 3 and the test button 4 may also be designed to have any other suitable shape or size. For example, one or both of the two buttons may be rectangular, square or polygonal in shape, or the two buttons may have the same size.

[0034] In some embodiments, the reset assembly may include a reset rod 92 and a reset spring 93, the reset button 3 is connected to the reset rod 92 through a limit hole on the control circuit board 91, and the reset spring 93 is connected to the other end of the reset rod 92. When the reset button 3 is pressed, the reset rod 92 is engaged with the matching structure on the release 98, and the spring force released by the reset spring 93 drives the moving electric contacts on the N moving contact arm 97A and the L moving contact arm 97B of the output assembly to connect with the electrostatic contacts on the N contact arm 96A and the L contact arm 96B of the input assembly, thereby turning on the power supply.

[0035] from Figure 3 As can be seen in the figure, the detection coil assembly 95 is provided with a hole 951, and the plug pins 51 and 52 can be coupled with the connection wire welding holes 51B and 52B on the control circuit board 91 through the plug connection wires 51A and 52A passing through the hole 951, and detect whether there is a leakage fault in the power supply passing through the plug connection wires 51A and 52A. In some embodiments, the trip coil assembly 94 can be provided with a coupling structure for receiving and fixing the detection coil assembly 95, for example Figure 3 The hook 944 is shown as an example in the figure. Accordingly, a bayonet 952 is provided on the detection coil assembly 95 to match it, so that the detection coil assembly 95 and the tripping coil assembly 94 are coupled and fixed together, as shown in FIG. Figure 5A and Figure 5B As shown. In this way, the tripping coil assembly 94 also plays the role of accommodating and fixing the detection coil assembly 95, thereby reducing the parts used to install the detection coil assembly, so that the product size is further reduced.

[0036] In some embodiments, a tripping core 941, a tripping spring 942, and a coil baffle 943 may be provided in the tripping coil assembly 94 to prevent the tripping core 941 and the tripping spring 942 from falling off. When a leakage fault occurs in the power supply, the tripping coil assembly 94 generates a magnetic field to drive the tripping core 941 to move, so as to release the engagement state between the reset rod 92 and the tripper 98, so as to cause the N moving contact arm 97A and the L moving contact arm 97B overlapped on the two tripping arms 98A and 98B of the tripper 98 to deform, and contact and close with the N contact arm 96A and the L contact arm 96B to connect the circuit, or vice versa, cause the N moving contact arm 97A and the L moving contact arm 97B to break contact with the N contact arm 96A and the L contact arm 96B to disconnect the circuit.

[0037] When the power is turned on, Figure 4A As shown, the movable identification rod 7 moves up together with the tripper 98 and approaches the indicator 8, and the color on the movable identification rod 7 is visible on the surface of the housing cover 2 through the indicator 8. Figure 4B As shown, the movable identification rod 7 moves downward along with the release 98 and leaves the indicator 8, so that the color on the movable identification rod 7 cannot be seen through the indicator 8 on the surface of the shell cover 2, thereby simply and conveniently realizing the intuitive display of the working status of the leakage protection device.

[0038] The following combination Figure 6 The working principle of the leakage protection device of the present invention is described. When there is no leakage current in L and N, pressing the reset button (RESET) can realize the power connection between the input and output ends. When the detection coil (CT) detects that there is leakage current in L and N, CT transmits the detected leakage current signal to the processor IC. If the leakage current exceeds the set value, the IC sends a signal to drive the thyristor SRC to turn on, so that the trip coil SOL generates a magnetic field, drives the trip core to move, and disconnects the power connection between the input and output ends.

[0039] It should be understood here that the embodiments shown in the figures only show the optional shapes, sizes and arrangements of the various optional components of the leakage protection device according to the present invention. However, they are only illustrative and not restrictive. Other shapes, sizes and arrangements may also be adopted without departing from the spirit and scope of the present invention.

[0040] The technical content and technical features of the present invention have been disclosed above. However, it can be understood that under the creative ideas of the present invention, those skilled in the art can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims

1. A leakage protection device, comprising a housing and a core assembly disposed in the housing, wherein the core assembly comprises a control circuit board, and an input assembly, an output assembly and a trip assembly coupled to the control circuit board, characterized in that: The trip assembly includes a trip coil assembly coupled to the control circuit board, and the contact arm of the input assembly and the contact arm of the output assembly are fixed and limited by the trip coil assembly to couple to the control circuit board; the leakage protection device also includes an indication assembly, which includes an active identification member that cooperates with the trip assembly and an indication member that penetrates to the outside of the shell, so that the indication assembly displays in real time the status of the trip assembly connecting or disconnecting the input assembly and the output assembly.

2. The leakage protection device according to claim 1, characterized in that: The input component includes a pair of contact arms, each contact arm is provided with an electrostatic contact, the output component includes a pair of elastic contact arms, each elastic contact arm is provided with a moving electric contact to cooperate with the electrostatic contact, the tripping component is provided with a tripping device that causes the moving electric contact to contact or disengage with the electrostatic contact, and the movable identification member is configured to cooperate and connect with the tripping device.

3. The leakage protection device according to claim 2, characterized in that: The movable identification member is configured to be rod-shaped, and comprises a clamping portion clamped to the releaser and an identification end extending to be adjacent to the indicator member, wherein the identification end has a flat surface.

4. The leakage protection device according to claim 3, characterized in that: At least the identification end of the movable identification member has an indicating color.

5. The leakage protection device according to claim 4, characterized in that: The indicating member is made of a transparent material and is provided with a light-guiding inclined surface corresponding to the marking end of the movable marking member.

6. The leakage protection device according to any one of claims 1 to 5, characterized in that: The leakage protection device also includes a detection coil assembly coupled to the control circuit board, and the trip coil assembly is provided with a coupling structure for receiving and fixing the detection coil assembly.

7. The leakage protection device according to claim 6, characterized in that: The detection coil component is provided with a hole for the connecting wire of the input component to pass through, so that the input component is coupled to the control circuit board.

8. The leakage protection device according to any one of claims 1 to 5, characterized in that: The housing comprises a housing seat and a housing cover which are connected to each other, the input assembly and the output assembly extend out of the housing seat, and the housing cover is provided with a hole for the indication assembly to be embedded.

9. The leakage protection device according to claim 8, characterized in that: The shell seat and the shell cover are connected by threaded fasteners, wherein the shell body is further provided with a shielding cover to cover the exposed part of the threaded fasteners.

Images