Leakage protection socket with automatic forced tripping function

Abstract

The present invention discloses a leakage protection socket with an automatic forced tripping function, which is characterized in that: it also includes a component with an overload and leakage automatic forced tripping function; the component includes a bimetallic strip and a linkage member. The bimetallic strip is connected to the live wire in the power supply circuit of the leakage protection socket through a wire or a conductive metal sheet; the linkage member is located next to the bimetallic strip and is linked with the bimetallic strip. The linkage member also conflicts with the horizontally placed L-shaped lock in the tripping component. When the bimetallic strip is deformed, the bimetallic strip activates the L-shaped lock through the linkage member, thereby tripping the leakage protection socket and cutting off the power output.

Description

Technical Field

[0001] The invention relates to a power socket with a leakage protection function, in particular to a leakage protection socket with an automatic forced tripping function. Background Art

[0002] With the increase of electrical equipment, multiple electrical appliances are often connected to the same power strip. When multiple electrical appliances are working at the same time for a long time, we often worry whether the leakage protection socket can trip and cut off the power output when the line is overloaded? When the electrical equipment has leakage, can the leakage protection socket trip and cut off the power output? Therefore, the power sockets (also called power strips, power wiring boards) currently seen on the market all have leakage and overload protection functions.

[0003] like Figure 1 , Figure 2 As shown, a common power socket on the market includes a shell 1, a reset button 2, a test button 3, a three-hole power socket 11, and a two-hole power socket 12 arranged on the shell 1, and a power live wire conductive metal row and a power neutral wire conductive metal row (not shown in the figure) connected to the three-hole power socket and the two-hole power socket arranged in the shell.

[0004] A circuit board 7 with leakage protection function and a release assembly are arranged in the housing. The circuit board 7 is provided with an overload and leakage protection circuit and a coil for detecting leakage current and overload current. The coil is wound around the middle 61 of the coil frame 6; an iron core 66 is arranged in the coil. The release assembly includes a release 5 with a longitudinal through hole on the top surface, a lock spring 51 and a transversely placed L-shaped lock 52 with a longitudinal through hole on the top surface. The L-shaped lock 52 is inserted into the release 5, and a lock spring 51 is placed between the side wall of the lock 52 and the release 5. The release assembly is placed in the coil frame 6, and the end of the iron core 66 is facing the side wall of the L-shaped lock 52.

[0005] The coil frame 6 is arranged above the circuit board 7, and the coil protection cover 4 is arranged above the coil frame 6. The live wire moving contact piece 20L and the neutral wire moving contact piece 20N are respectively placed above the left and right sides of the release 5, and the fast trip spring 8 is respectively arranged between the live wire moving contact piece 20L, the neutral wire moving contact piece 20N and the coil protection cover 4.

[0006] The coil protection cover 4 contains a live wire input terminal 2L and a neutral wire input terminal 2N of the leakage protection socket connected to the live wire and the neutral wire of the external power supply; a live wire moving contact piece 20L and a neutral wire moving contact piece 20N connected to the live wire and the neutral wire conductive metal bar in the shell.

[0007] The reset pin 21 located below the reset button 2 and linked therewith passes through the through hole on the top surface of the release 5 and is located above the top surface of the L-shaped lock buckle 52. When the reset button 2 is pressed, the leakage protection socket functions well, the electrical equipment is in good condition without leakage, and when there is no overload, the reset pin 21 below the reset button 2 is stuck by the lower plane of the through hole on the top surface of the L-shaped lock buckle 52, the reset button 2 is reset, the power live wire input terminal 2L is connected to the live wire moving contact piece 20L, the power neutral wire input terminal 2N is connected to the neutral wire moving contact piece 20N, the power live wire conductive metal bar and the power neutral wire conductive metal bar connected to the three-hole power socket and the two-hole power socket in the housing are energized, the leakage protection socket has power output, and the electrical equipment is powered, and the electrical equipment works.

[0008] When leakage occurs in the electrical equipment or the entire power supply circuit is overloaded, the coil on the circuit board 7 detects leakage current or overload current, and the coil generates a magnetic field to attract the iron core 66 to operate; the iron core 66 pushes the lock 52 to operate, so that the reset pin 21 passing through the longitudinal through holes on the top surfaces of the lock 52 and the release 5 jumps out of the longitudinal through holes of the lock 52 and the release 5, and the reset button 2 jumps / trips, the live wire input terminal 2L of the power supply is disconnected from the live wire moving contact piece 20L, the neutral wire input terminal 2N of the power supply is disconnected from the neutral wire moving contact piece 20N, the live wire conductive metal bar and the neutral wire conductive metal bar of the power supply connected to the three-hole power socket and the two-hole power socket in the shell are not energized, the leakage protection socket cuts off the power output, cuts off the power supply to the electrical equipment, and the electrical equipment stops working.

[0009] The disadvantage of this power socket with leakage and overload protection function is that since this power socket cuts off the power output of the power socket and cuts off the power supply of the electrical equipment through the action of overload and leakage protection circuits, coils, iron cores, trip components and other devices, and then stops the electrical equipment from working to achieve the purpose of protection, once an electronic component, such as a coil for detecting leakage current or overload current or a capacitor or switch tube on the circuit board is damaged, even if other components are intact, the protection function of the leakage protection socket will fail. Summary of the invention

[0010] In view of the above reasons, the purpose of the present invention is to provide a leakage protection socket with an automatic forced tripping function. The leakage protection socket adds a structure with an overload and leakage automatic forced tripping function to the existing leakage current and overload protection structure, so that the leakage protection socket has a dual protection structure, ensuring that the leakage protection socket has leakage and overload protection functions.

[0011] To achieve the above object, the present invention adopts the following technical scheme: a leakage protection socket with automatic forced tripping function, which includes a shell, a reset button and a test button arranged on the shell; a tripping assembly arranged in the shell; the tripping assembly includes a tripper with a longitudinal through hole on the top surface, a lock spring and a transversely placed L-shaped lock with a longitudinal through hole on the top surface; a reset pin located below the reset button and linked with the reset button passes through the longitudinal through hole on the top surface of the tripper and is located above the top surface of the L-shaped lock; characterized in that:

[0012] It also includes a component with an overload and leakage automatic forced tripping function; the component includes a bimetallic strip and a linkage piece; the bimetallic strip is connected to the live wire in the power supply circuit of the leakage protection socket through a wire or a conductive metal sheet; the linkage piece is located next to the bimetallic strip and is linked to the bimetallic strip; the linkage piece also conflicts with the horizontally placed L-shaped lock in the tripping component; when the bimetallic strip is deformed, the bimetallic strip activates the L-shaped lock through the linkage piece, causing the leakage protection socket to trip and cut off the power output.

[0013] In a preferred embodiment of the present invention, the linkage member is L-shaped and is located below the bimetallic strip, and the side wall of the linkage member conflicts with the side wall of the transverse L-shaped lock in the trip assembly.

[0014] The bimetal strip is located below the test button.

[0015] In another preferred embodiment of the present invention, the linkage member is located next to the bimetallic strip; the end of the bimetallic strip is in contact with the linkage member to push the linkage member to operate; the end of the linkage member directly contacts the side wall of the top surface of the horizontal L-shaped lock to push the lock to operate.

[0016] An L-shaped elastic release piece is arranged below the test button, and the side wall of the L-shaped elastic release piece contacts the side wall of the L-shaped lock buckle to push the L-shaped lock buckle to move;

[0017] The protrusion at the bottom of the test button is stuck in the through hole on the top surface of the elastic release piece.

[0018] The advantages of the present invention are as follows: when an electronic component in the original leakage protection circuit of the leakage protection socket fails and cannot play its due protection function, the component with overload and leakage automatic forced tripping function added by the present invention is actuated to trip the leakage protection socket and cut off the power output of the leakage protection socket, thus playing a protective role. The component with overload and leakage automatic forced tripping function added by the present invention has a simple structure, sensitive action and rapid response, so that the improved leakage protection socket has a double insurance function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance of a leakage protection socket;

[0020] Figure 2 Implement leakage overload protection principle diagram for existing leakage protection sockets;

[0021] Figure 3 This is a schematic diagram of the partial decomposition structure of the embodiment 1 of the present invention with overload and leakage protection functions;

[0022] Figure 4A It is a cross-sectional view of the partial reset state of the overload and leakage protection function of embodiment 1 of the present invention;

[0023] Figure 4B This is a structural schematic diagram of the embodiment 1 of the present invention when the overload and leakage protection functions are partially reset;

[0024] Figure 5A It is a cross-sectional view of the overload state of the part with overload and leakage protection function of embodiment 1 of the present invention;

[0025] Figure 5B This is a structural schematic diagram of a part of the embodiment 1 of the present invention having overload and leakage protection functions in an overload state;

[0026] Figure 6 This is a schematic diagram of the partial decomposition structure of the overload and leakage protection function of embodiment 2 of the present invention;

[0027] Fig. 7A It is a partial cross-sectional view of the overload state of the part with overload and leakage protection function of embodiment 2 of the present invention;

[0028] Figure 7B Another partial cross-sectional view of the overload and leakage protection part of Embodiment 2 of the present invention when in an overload state;

[0029] Figure 7C This is a schematic diagram of the structure of the overload and leakage protection part of Embodiment 2 of the present invention when it is in an overload state;

[0030] Fig. 8A It is a cross-sectional view showing the positional relationship between the tripping piece and the lock catch in the reset state of the second embodiment of the present invention;

[0031] Figure 8B This is a cross-sectional view of the positional relationship between the tripping piece and the lock buckle when the release is manually forced. DETAILED DESCRIPTION

[0032] The structure and features of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that various modifications can be made to the embodiments disclosed herein, and therefore, the embodiments disclosed in the specification should not be regarded as limiting the present invention, but are merely examples of embodiments, the purpose of which is to make the features of the present invention obvious.

[0033] In order to overcome the drawback that once an electronic component in the leakage and overload protection circuit of the existing leakage protection socket is damaged while other components are intact, the protection function of the leakage protection socket is invalid, the present invention adds a component with an automatic forced tripping function for overload and leakage. The component includes a bimetallic strip and a linkage. The bimetallic strip is connected to the live wire in the power supply circuit of the leakage protection socket through a wire or a conductive metal strip. The linkage is located next to the bimetallic strip and is linked to the bimetallic strip. At the same time, the linkage also conflicts with the horizontal L-shaped lock in the tripping component; when the bimetallic strip is deformed, the bimetallic strip activates the L-shaped lock through the linkage, thereby tripping the leakage protection socket and cutting off the power output.

[0034] When electrical equipment leaks or is overloaded, the current in the power supply circuit of the leakage protection socket exceeds the rated current value, and the bimetallic strip connected in series in the power supply circuit of the leakage protection socket is deformed, causing the linkage part linked to it to move, pushing the L-shaped lock in the trip assembly to move, causing the reset pin passing through the longitudinal through hole on the top surface of the lock and the trip device to jump out of the longitudinal through hole of the lock and the trip device, and the reset button jumps / trips, the live wire input end of the power supply is disconnected from the live wire moving contact piece, the neutral wire input end of the power supply is disconnected from the neutral wire moving contact piece, the live wire conductive metal bar and the neutral wire conductive metal bar of the power supply connected to the three-hole power socket and the two-hole power socket in the shell are powered off / not energized, the leakage protection socket cuts off the power output, stops supplying power to the electrical equipment, and the electrical equipment stops working.

[0035] Figure 3 This is a schematic diagram of the partial decomposition structure of the embodiment 1 of the present invention with overload and leakage protection functions. Figure 3 As shown, the component with the function of automatic forced tripping due to overload and leakage includes a bimetallic strip 32 and a linkage member 33. The bimetallic strip 32 is connected to the live wire in the power supply circuit of the leakage protection socket through the conductive metal strip 31. The linkage member 33 is located below the bimetallic strip 32 and is linked with the bimetallic strip. In the first embodiment of the invention, the linkage member 33 is L-shaped, and its side wall conflicts with the side wall of the L-shaped lock buckle 52 placed horizontally in the tripping component.

[0036] like Figure 4A , Figure 4BAs shown, when the reset button 2 is pressed, the leakage protection socket functions well, and the electrical equipment is in good condition without leakage or overload, the reset pin 21 below the reset button 2 is caught by the through hole on the top surface of the L-shaped lock buckle 52, the reset button 2 is reset, the live wire input terminal 2L of the power supply is connected to the live wire moving contact piece 20L, the neutral wire input terminal 2N of the power supply is connected to the neutral wire moving contact piece 20N, the live wire conductive metal row and the neutral wire conductive metal row connected to the three-hole power jack and the two-hole power jack in the shell are energized, the leakage protection socket has power output, supplies power to the electrical equipment, and the electrical equipment works; at the same time, the bimetallic strip 32 is in a normal state without deformation, the linkage member 33 does not move, and the side wall of the linkage member 33 conflicts with the side wall of the horizontal L-shaped lock buckle 52.

[0037] like Figure 5A , Figure 5B As shown, when leakage occurs in the electrical equipment or overload occurs in the entire power supply circuit, the bimetallic strip 32 connected in series in the power supply circuit of the leakage protection socket is deformed. Due to the deformation of the bimetallic strip 32, the linkage member 33 is deformed and moves, pushing the side wall of the L-shaped lock buckle 52, so that the L-shaped lock buckle 52 is actuated, so that the reset pin 21 passing through the longitudinal through hole of the lock buckle 52 and the top surface of the release 5 is tripped from the longitudinal through hole of the lock buckle 52 and the release 5, the reset button 2 is tripped, the live wire input terminal 2L of the power supply is disconnected from the live wire moving contact piece 20L, the neutral wire input terminal 2N of the power supply is disconnected from the neutral wire moving contact piece 20N, the live wire conductive metal bar and the neutral wire conductive metal bar of the power supply connected to the three-hole power socket and the two-hole power socket in the shell are not energized, the leakage protection socket cuts off the power output, cuts off the power supply of the electrical equipment, and the electrical equipment stops working.

[0038] like Figure 3 , Figure 4A , Figure 5A As shown, the bimetallic strip 32 is located below the test button 3, and the protrusion at the bottom of the test button 3 is stuck in the through hole 321 on the top surface of the bimetallic strip 32. During use, the user can also press the test button 3 and observe whether the reset button 2 can trip / trip, thereby detecting whether the leakage protection socket is intact and whether it still has the leakage protection function and the overload protection function.

[0039] Figure 6 This is a schematic diagram of the partial decomposition structure of Example 2 of the present invention with overload and leakage protection functions. As shown in the figure, the component with overload automatic forced tripping function shown in Example 2 of the present invention includes a bimetallic strip 63 and a linkage member 64. The bimetallic strip 63 is connected to the live wire in the power supply circuit of the leakage protection socket through a conductive metal strip 62. The linkage member 64 is located next to the bimetallic strip 63 and is linked to the bimetallic strip 63. In Example 2 of the present invention, the end 63 of the bimetallic strip 63 is in contact with the linkage member 64, and the end 644 of the linkage member 64 directly contacts the side wall of the top surface of the horizontal L-shaped lock buckle 52.

[0040] When the reset button 2 is pressed, the leakage protection socket functions well, and the electrical equipment is in good condition without leakage or overload, the reset pin 21 below the reset button 2 is caught by the lower plane of the through hole on the top surface of the L-shaped lock buckle 52, the reset button 2 is reset, the live wire input terminal 2L of the power supply is connected to the live wire moving contact piece 20L, the neutral wire input terminal 2N of the power supply is connected to the neutral wire moving contact piece 20N, the live wire conductive metal bar and the neutral wire conductive metal bar of the power supply connected to the three-hole power jack and the two-hole power jack in the shell are energized, the leakage protection socket has power output, supplies power to the electrical equipment, and the electrical equipment works; at the same time, the bimetallic strip 63 is in a normal state without deformation, and the linkage member 64 does not move.

[0041] like Figure 6 , Figure 7A-7C As shown, when leakage occurs in the electrical equipment or the entire power supply circuit is overloaded, the bimetallic strip 63 connected in series in the power supply circuit of the leakage protection socket is deformed. Due to the deformation of the bimetallic strip 63, its end 631 pushes the linkage member 64 to move, and the end 644 of the linkage member 64 pushes the side wall of the top surface of the L-shaped lock buckle 52 to move the L-shaped lock buckle 52, thereby causing the reset pin 21 passing through the longitudinal through hole on the top surface of the lock buckle 52 and the release 5 to jump out of the longitudinal through hole of the lock buckle 52 and the release 5, and the reset button 2 jumps / trips, the live wire input terminal 2L of the power supply is disconnected from the live wire moving contact piece 20L, the neutral wire input terminal 2N of the power supply is disconnected from the neutral wire moving contact piece 20N, the live wire conductive metal bar and the neutral wire conductive metal bar of the power supply connected to the three-hole power socket and the two-hole power socket in the shell are not energized, the leakage protection socket cuts off the power output, cuts off the power supply of the electrical equipment, and the electrical equipment stops working.

[0042] like Figure 6 , Fig. 8A , Figure 8B As shown, in Embodiment 2 of the present invention, an L-shaped elastic release piece 31 is disposed below the test button 3, and the side wall of the L-shaped elastic release piece 31 contacts the side wall of the L-shaped lock buckle 52. The protrusion at the bottom of the test button 3 is stuck in the through hole on the top surface of the elastic release piece 31.

[0043] During use, the user can press the test button 3 to activate the elastic release piece 31. Due to the movement of the elastic release piece 31, its side wall pushes against the side wall of the L-shaped lock buckle 52, causing the L-shaped lock buckle 52 to move, thereby causing the reset pin 21 passing through the longitudinal through hole on the top surface of the lock buckle 52 and the release 5 to jump out of the longitudinal through hole of the lock buckle 52 and the release 5, and the reset button 2 jumps / trips, the live wire input terminal 2L of the power supply is disconnected from the live wire moving contact piece 20L, the neutral wire input terminal 2N of the power supply is disconnected from the neutral wire moving contact piece 20N, the live wire conductive metal bus and the neutral wire conductive metal bus connected to the three-hole power socket and the two-hole power socket in the shell are not energized, the leakage protection socket cuts off the power output, cuts off the power supply of the electrical equipment, the electrical equipment stops working, and checks whether the mechanical parts of the leakage protection socket are intact.

[0044] The bottom of the reset pin 21 located below the reset button 2 in the traditional leakage protection socket and linked to it is pointed. When the protection function of the leakage protection socket fails, it can still be reset, misleading consumers to continue using it. Figure 3 , Figure 6 As shown, the present invention designs the bottom of the reset pin 21 to be flat. If the protection function of the leakage protection socket fails, the reset button is pressed and the reset pin 21 will prevent the reset button from resetting.

[0045] The advantages of the present invention are as follows: when an electronic component in the original leakage protection circuit of the leakage protection socket fails and cannot play its due protection function, the component with overload and leakage automatic forced tripping function added by the present invention is actuated to trip the leakage protection socket and cut off the power output of the leakage protection socket, thus playing a protective role. The component with overload and leakage automatic forced tripping function added by the present invention has a simple structure, sensitive action and rapid response, so that the improved leakage protection socket has a double insurance function.

[0046] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A leakage protection socket with automatic forced tripping function, which includes a housing, a reset button and a test button arranged on the housing; A release assembly is arranged in the housing; the release assembly comprises a releaser with a longitudinal through hole on the top surface, a lock spring and a transversely placed L-shaped lock with a longitudinal through hole on the top surface; The reset pin located below the reset button and linked therewith passes through the longitudinal through hole on the top surface of the release and is located above the top surface of the L-shaped lock buckle; characterized in that: It also includes a component with overload and leakage automatic forced tripping function; the component includes a bimetallic sheet and a linkage piece; The bimetallic strip is connected to the live wire in the power supply circuit of the leakage protection socket through a wire or a conductive metal strip; The linkage member is located beside the bimetallic strip and is linked with the bimetallic strip; the linkage member also conflicts with the horizontally placed L-shaped lock in the trip assembly; When the bimetallic strip is deformed, the bimetallic strip activates the L-shaped lock through the linkage member, causing the leakage protection socket to trip and cut off the power output; The end of the bimetallic strip contacts the linkage member, which can push the linkage member to move; the end of the linkage member directly contacts the side wall of the top surface of the horizontal L-shaped lock buckle, which pushes the lock buckle to move.

2. The leakage protection socket with automatic forced tripping function according to claim 1 is characterized in that: The linkage member is L-shaped and is located below the bimetallic strip. The side wall of the linkage member conflicts with the side wall of the transversely placed L-shaped lock in the trip assembly.

3. The leakage protection socket with automatic forced tripping function according to claim 1 is characterized in that: The bimetal strip is located below the test button.

4. The leakage protection socket with automatic forced tripping function according to claim 1, characterized in that: An L-shaped elastic release piece is arranged below the test button, and the side wall of the L-shaped elastic release piece contacts the side wall of the L-shaped lock buckle to push the L-shaped lock buckle to move; The protrusion at the bottom of the test button is stuck in the through hole on the top surface of the elastic release piece.

5. The leakage protection socket with automatic forced tripping function according to any one of claims 1 to 3, characterized in that: The bottom of the reset pin is a plane.

Images