A leakage protection plug

Abstract

This utility model discloses a leakage current protection plug, including a plug bottom shell and a plug front cover fixed by screws. A leakage current protection structure and conductive terminals are disposed between the plug bottom shell and the plug front cover. The leakage current protection structure includes a bracket, a leakage current protection circuit board, conductive contacts, a coil, an iron core, a reset button, a spring, and a spring. The leakage current protection circuit board is snapped onto the top surface of the bracket, the coil is fixed to the bottom surface of the leakage current protection circuit board and connected to the circuit board, and the iron core is inserted into the coil. The reset button is disposed within the bracket, and a spring is connected between the end of the iron core and the reset button. The spring is disposed between the iron core and the inner wall of the bracket, and the conductive contacts are fixed to the side of the leakage current protection circuit board. This utility model has a reasonable structural design and a simple overall structure. During assembly, the bracket provides support and limitation, facilitating processing and maintenance, and ensuring stable and reliable operation.

Description

Technical Field

[0001] This utility model belongs to the field of plug technology, specifically relating to a leakage protection plug. Background Technology

[0002] A residual current device (RCD) is a structure used to protect electrical appliances. Conventional RCDs are standalone structures, which greatly increase the cost of use and space requirements. Based on this, patent 202221156940.6 discloses an RCD plug structure. Although it can meet the general usage needs, its overall structure is relatively complex, which greatly increases the cost of use and makes disassembly and assembly inconvenient, thus making it difficult to meet market demands and limiting its applicability. Utility Model Content

[0003] The purpose of this utility model is to provide a leakage protection plug with a reasonable structure and convenient assembly and disassembly.

[0004] The technical solution to achieve the purpose of this utility model is a leakage current protection plug, including a plug bottom shell and a plug front cover fixed by screws. A plug wire is inserted into the side of the plug bottom shell and the plug front cover. A leakage current protection structure and a conductive terminal are provided between the plug bottom shell and the plug front cover. The end of the conductive terminal is provided through the bottom wall of the plug bottom shell. The leakage current protection structure includes a bracket, a leakage current protection circuit board, a conductive contact, a coil, an iron core, a reset button, a spring, and a spring.

[0005] The leakage protection circuit board is mounted on the top surface of the bracket, the coil is fixed on the bottom surface of the leakage protection circuit board and connected to the leakage protection circuit board, and the iron core is inserted into the coil.

[0006] The reset button is located inside the bracket, and the spring is connected between the end of the iron core and the reset button. The spring is located between the iron core and the inner wall of the bracket, and the spring and the spring are located at the symmetrical ends of the iron core.

[0007] The conductive contact is fixed on the side of the leakage protection circuit board, the reset button abuts against the top surface of the middle part of the conductive contact, and the conductive contact is electrically connected to the static contact on the conductive terminal.

[0008] A further preferred embodiment is that the spring sheet includes a vertical U-shaped piece, an arc-shaped connecting piece integrally formed with the bottom end of the vertical U-shaped piece, and a transverse abutment piece integrally formed at the end of the arc-shaped connecting piece;

[0009] The end of the iron core is provided with an annular groove, which is locked into the recessed area of ​​the vertical U-shaped piece and the lateral abutment piece is locked into the reset button.

[0010] A further preferred embodiment is that the symmetrical sidewall of the reset button is integrally formed with an L-shaped abutment protrusion, and the lateral bottom surface of the L-shaped abutment protrusion abuts against the middle of the top surface of the conductive contact piece.

[0011] A further preferred embodiment is that a waterproof sealing gasket is provided at the connection between the plug bottom shell and the plug face cover.

[0012] A further preferred embodiment is that the symmetrical sidewalls of the bracket are provided with guide grooves with top openings;

[0013] The L-shaped abutment protrusion passes through the guide groove.

[0014] A further preferred embodiment is that: an installation limiting seat is provided inside the bottom shell of the plug, and the bracket is located inside the installation limiting seat and is snapped in place.

[0015] This utility model has positive effects: The structure of this utility model is reasonable. The leakage protection structure includes a bracket, a leakage protection circuit board, a conductive contact, a coil, an iron core, a reset button, a spring, and a spring. Its overall structure is simple. During assembly, the bracket provides support and limit. At the same time, each component is assembled on the bracket, which makes it easy to disassemble and assemble, which is conducive to processing and maintenance operations. It can also ensure stable and reliable use and has strong applicability. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the plug bottom shell and plug face cover when the installation limiting seat is removed;

[0019] Figure 3 This is a schematic diagram of the fully exploded structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the specific structure of the spring sheet, iron core and spring in this utility model.

[0021] Reference numerals: 1. Plug bottom shell; 2. Plug face cover; 3. Plug wire; 4. Leakage protection structure; 41. Bracket; 42. Leakage protection circuit board; 43. Conductive contact; 44. Coil; 45. Iron core; 46. Reset button; 47. Spring; 47. Vertical U-shaped piece; 471. Arc-shaped connecting piece; 472. Horizontal abutment piece; 473. Spring; 48. Conductive terminal; 5. L-shaped abutment protrusion; 6. Guide groove; 7. Waterproof sealing gasket; 8. Mounting limit seat; 9. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] See Figures 1 to 4 As shown, a leakage current protection plug includes a plug bottom shell 1 and a plug face cover 2 fixed by screws. A plug wire 3 is secured to the sides of the plug bottom shell and the plug face cover. A leakage current protection structure 4 and a conductive terminal 5 are disposed between the plug bottom shell and the plug face cover. In this embodiment, the plug bottom shell and plug face cover are conventional structures of the prior art, simply applied. The conductive terminal is a conventional double or triple terminal, and therefore not described in detail. In this embodiment, the plug wire is connected to the conductive terminal through the leakage current protection structure, which is a conventional structure, and the principle is as shown in the prior art document.

[0025] In this embodiment, the conductive terminal's pins pass through the bottom wall of the plug's bottom shell. The leakage protection structure includes a bracket 41, a leakage protection circuit board 42, a conductive contact 43, a coil 44, an iron core 45, a reset button 46, a spring 47, and a spring 48. The leakage protection circuit board is a conventional structure in the prior art, simply applied. The coil and iron core are also conventional structures in the prior art. When an external appliance leaks current, it triggers the internal switch of the leakage protection circuit board, energizing the coil. When the coil is energized, it attracts the iron core, which moves towards the end of the plug wire. When the spring reaches its maximum position, the reset button disengages from the spring, the spring bounces upward, and the conductive contact separates from the conductive end, thus disconnecting the power output. To reset, the reset button is pressed down. During the pressing process, it is again held in place by the spring, and the conductive contact contacts the conductive terminal for conductivity.

[0026] During assembly, the leakage protection circuit board is positioned on the top surface of the bracket, the coil is fixed to the bottom surface of the leakage protection circuit board and connected to it, and the iron core is inserted into the coil. The reset button is located within the bracket, and a spring is connected between the end of the iron core and the reset button. A spring is positioned between the iron core and the inner wall of the bracket, with the spring and spring positioned at symmetrical ends of the iron core. The conductive contact is fixed to the side of the leakage protection circuit board, and the reset button abuts against the top surface of the middle of the conductive contact. The conductive contact is electrically connected to the static contact on the conductive terminal. The overall structure is easy to assemble, reducing assembly difficulty and improving assembly efficiency. It is easy to disassemble and reassemble, and ensures stable and reliable operation, making it highly adaptable.

[0027] In this embodiment, the spring includes a vertical U-shaped piece 471, an arc-shaped connecting piece 472 integrally formed with the bottom end of the vertical U-shaped piece, and a transverse abutment piece 473 integrally formed at the end of the arc-shaped connecting piece. During assembly, an annular groove is provided at the end of the iron core, the annular groove is engaged in the recessed area of ​​the vertical U-shaped piece for limiting its position, and the transverse abutment piece is engaged in the reset button. This improves the ease of installation of the spring and the iron core.

[0028] The reset button described herein has an integrally formed L-shaped abutment protrusion 6 on its symmetrical sidewalls, the lateral bottom surface of which abuts against the center of the top surface of the conductive contact. A guide groove 7 with an open top is provided on the symmetrical sidewalls of the bracket; the L-shaped abutment protrusion passes through the guide groove. This structure improves the stability and effectiveness of the reset button during use, preventing tilting or displacement.

[0029] A waterproof sealing gasket 8 is provided at the connection between the plug bottom shell and the plug face cover. This improves the overall sealing and waterproof performance of the structure. An installation limiting seat 9 is provided inside the plug bottom shell, and the bracket is positioned within the installation limiting seat and locked in place. This improves the convenience and effectiveness of bracket installation.

[0030] This utility model has positive effects: The structure of this utility model is reasonable. The leakage protection structure includes a bracket, a leakage protection circuit board, a conductive contact, a coil, an iron core, a reset button, a spring, and a spring. Its overall structure is simple. During assembly, the bracket provides support and limit. At the same time, each component is assembled on the bracket, which makes it easy to disassemble and assemble, which is conducive to processing and maintenance operations. It can also ensure stable and reliable use and has strong applicability.

[0031] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0032] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A leakage current protection plug, comprising a plug base shell and a plug face cover fixed by screws, wherein a plug wire is engaged on the side of the plug base shell and the plug face cover, and a leakage current protection structure and a conductive terminal are disposed between the plug base shell and the plug face cover, wherein the lead of the conductive terminal passes through the bottom wall of the plug base shell, characterized in that: The electric leakage protection structure comprises a bracket, an electric leakage protection circuit board, a conductive contact piece, a coil, a core, a reset button, an elastic sheet and a spring; The electric leakage protection circuit board is clamped on the top surface of the bracket, the coil is fixed on the bottom surface of the electric leakage protection circuit board and connected with the electric leakage protection circuit board, and the core is inserted into the coil; The reset button is arranged in the bracket, the elastic sheet is connected between the end of the core and the reset button, the spring is arranged between the core and the inner wall of the bracket, and the elastic sheet and the spring are arranged on the symmetric ends of the core; The conductive contact piece is fixed on the side of the electric leakage protection circuit board, the reset button is abutted on the middle top surface of the conductive contact piece, and the conductive contact piece is connected with the static contact on the conductive terminal.

2. The plug of claim 1, wherein: The elastic sheet comprises a vertical U-shaped sheet, an arc-shaped connecting sheet integrally formed with the bottom end of the vertical U-shaped sheet, and a horizontal abutting sheet integrally formed on the end of the arc-shaped connecting sheet. The end of the core is provided with an annular groove, the annular groove is clamped into the recessed area of the vertical U-shaped sheet for limiting, and the horizontal abutting sheet is clamped into the reset button.

3. The plug of claim 2, wherein: The symmetric side walls of the reset button are integrally formed with L-shaped abutting protrusions, and the horizontal bottom surface of the L-shaped abutting protrusion is abutted on the middle top surface of the conductive contact piece.

4. The plug of claim 3, wherein: A waterproof sealing ring is arranged at the connection between the plug bottom shell and the plug face cover.

5. The plug of claim 3, wherein: The symmetric side walls of the bracket are provided with guide grooves with open top ends; The L-shaped abutting protrusion passes through the guide groove.

6. The plug of claim 1, wherein: A mounting limiting seat is arranged in the plug bottom shell, and the bracket is clamped and positioned in the mounting limiting seat.

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