Residual-current circuit breaker with power-off controlled by microswitch

Abstract

The utility model relates to a residual-current circuit breaker using a microswitch to control power-off, which comprises a shell, a reset button, a tripping mechanism, a rectification circuit board and a wiring terminal are arranged in the shell, the reset button is connected with the tripping mechanism and used for driving the tripping mechanism to reset, the rectification circuit board is connected with the wiring terminal, the microswitch is arranged in the shell, and the rectification circuit board is connected with the wiring terminal. A trigger piece is arranged below the reset button, the microswitch is located below the trigger piece, and the rectification circuit board is connected with the wiring terminal through the microswitch. When the reset button is pressed down to drive the tripping mechanism to reset, the triggering piece triggers the microswitch to enable the microswitch to be closed. And when the reset button bounces, the trigger piece is separated from the microswitch, so that the microswitch is switched off. When the reset button is pressed down, the microswitch is closed to enable the rectification circuit board to be powered on, and when the reset button bounces up, the microswitch is disconnected to enable the rectification circuit board to be powered off, so that the residual-current circuit breaker disconnects an external circuit and also disconnects an internal power taking loop at the same time.

Description

Technical Field

[0001] The utility model relates to the field of leakage circuit breakers, and more specifically, to a leakage circuit breaker with power-off controlled by a micro switch. Background Art

[0002] A residual current circuit breaker is an electrical safety device used to protect people from the danger of electric shock. It determines whether there is a leakage by detecting the residual current (i.e. leakage current) in the circuit, and quickly cuts off the circuit when the residual current exceeds the set threshold to ensure personal safety. The residual current circuit breaker itself also requires power supply to work properly, but it is usually not necessary to provide a separate power supply for it. It is usually powered by internal power, that is, the residual current circuit breaker has a small rectifier built in, which can draw a small amount of current from the main circuit to power the internal circuit.

[0003] The prior art, for example, a tripping mechanism of a leakage circuit breaker with announcement number CN204857632U, includes a circuit breaker housing, a circuit breaker mechanism, a leakage current detection system, an electronic control system, an electromagnetic tripper and a tripping reset device, wherein the tripping reset device includes a reset member, a tripping connecting rod, a mounting shaft, and a reset spring, wherein the reset member is slidably connected to the circuit breaker housing through the reset spring, and the middle part of the tripping connecting rod is rotatably connected to the bottom of the reset member through the mounting shaft, and the moving iron core of the electromagnetic tripper is transmission-connected to one end of the tripping connecting rod, and a hook is also provided at one end of the tripping connecting rod for being buckled or abutted with the reset member, and the other end of the tripping connecting rod is transmission-connected to the circuit breaker mechanism. After the existing leakage circuit breaker judges the leakage and cuts off the circuit, the rectifier is still connected, so there are certain safety hazards. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model proposes a leakage circuit breaker with power off controlled by a micro switch, in which a switch component is arranged between a rectifier circuit board and a connection terminal, so as to cut off the circuit of the rectifier circuit board after power off.

[0005] The technical solution of the utility model is as follows:

[0006] A leakage circuit breaker with power-off controlled by a micro switch comprises a housing, a reset button, a tripping mechanism, a rectifier circuit board and a wiring terminal are arranged in the housing, the reset button is connected to the tripping mechanism to drive the tripping mechanism to reset, the rectifier circuit board is connected to the wiring terminal, a micro switch is arranged in the housing, a trigger is arranged below the reset button, the micro switch is located below the trigger, and the rectifier circuit board is connected to the wiring terminal through the micro switch;

[0007] When the reset button is pressed to reset the tripping mechanism, the trigger element triggers the micro switch, closing it.

[0008] When the reset button pops up, the trigger is separated from the micro switch, causing the micro switch to be disconnected.

[0009] In summary, the above technical solution has the following beneficial effects: after the traditional leakage circuit breaker is disconnected, the tripping mechanism will be disconnected to break the circuit between the two terminals, and the reset button will also pop up, but the rectifier circuit board is still connected to the two terminals for work. In this application, a micro switch is connected between the rectifier circuit board and the terminals, so that the micro switch and the reset button are linked. When the reset button is pressed, the micro switch is closed to energize the rectifier circuit board. When the reset button pops up, the micro switch is disconnected to cut off the power to the rectifier circuit board, so that the leakage circuit breaker disconnects the external circuit while also disconnecting the internal power supply circuit, making the circuit safer after a circuit failure and reducing the possibility of accidents. The principles of the tripping mechanism and the reset button in this application are all prior art, and therefore are not shown in the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of a housing of a leakage circuit breaker with a micro switch controlling power-off;

[0011] Figure 2 A schematic diagram of a reset button of a residual current circuit breaker whose power is cut off by a micro switch;

[0012] Figure 3 The present invention is a schematic diagram of a triggering component of a leakage circuit breaker whose power is cut off by a micro switch.

[0013] Reference numerals: 10, housing; 20, reset button; 21, trigger member; 211, connecting portion; 212, trigger portion; 30, rectifier circuit board; 40, connecting terminal; 50, micro switch. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0015] like Figures 1-3As shown in the figure, a leakage circuit breaker controlled by a microswitch to cut off power includes a housing 10. Inside the housing 10, there are a reset button 20, a tripping mechanism, a rectifying circuit board 30, and a terminal block 40. The reset button 20 is connected to the tripping mechanism and is used to drive the tripping mechanism to reset. The rectifying circuit board 30 is connected to the terminal block 40. A microswitch 50 is arranged inside the housing 10. A trigger 21 is arranged below the reset button 20, and the microswitch 50 is located below the trigger 21. The rectifying circuit board 30 is connected to the terminal block 40 through the microswitch 50. When the reset button 20 is pressed to drive the tripping mechanism to reset, the trigger 21 triggers the microswitch 50 to make the microswitch 50 closed. When the reset button 20 pops up, the trigger 21 is separated from the microswitch 50 to make the microswitch 50 open. After the traditional leakage circuit breaker is disconnected, the tripping mechanism will disconnect, causing an open circuit between the two terminal blocks 40, and the reset button 20 will also pop up. However, the rectifying circuit board 30 is still connected to the two terminal blocks 40 to work. In this application, a microswitch 50 is connected between the rectifying circuit board 30 and the terminal block 40, and the microswitch 50 is linked with the reset button 20. When the reset button 20 is pressed, the microswitch 50 is closed to supply power to the rectifying circuit board 30. When the reset button 20 pops up, the microswitch 50 is open to cut off the power supply to the rectifying circuit board 30. Thus, while the leakage circuit breaker disconnects the external circuit, it also disconnects the internal power supply circuit, making the circuit safer after a circuit fault and reducing the possibility of accidents. The principles of the tripping mechanism and the reset button 20 in this application are all prior art, so they are not shown in the drawings.

[0016] A plurality of pairs of terminal blocks 40 are provided. The rectifying circuit board 30 is connected in series between each pair of terminal blocks 40, and a microswitch 50 is connected between each pair of terminal blocks 40.

[0017] Two pairs of terminal blocks 40 are provided, and a microswitch 50 is connected in series between the two pairs of terminal blocks 40.

[0018] Three pairs of terminal blocks 40 are provided, and a microswitch 50 is connected in series between the three pairs of terminal blocks 40. The leakage circuit breaker can be 1P, 2P, or 3P. Therefore, the terminal block 40 can be provided with one pair, two pairs, or three pairs. The rectifying circuit board 30 can draw power from any one of the three live wires. A microswitch 50 is arranged on each live wire, which can still draw power and work when a certain live wire is disconnected, and can also disconnect the three live wires simultaneously after the leakage circuit breaker determines a leakage trip to cut off the internal power supply circuit of the rectifying circuit board 30.

[0019] Each microswitch 50 is arranged side by side below the trigger 21.

[0020] The trigger member 21 includes a connecting portion 211 and a trigger portion 212. One end of the connecting portion 211 is connected to the bottom of the reset button 20, and the other end of the connecting portion 211 is connected to the trigger portion 212. The trigger portion 212 is located above each micro switch 50. When the reset button 20 is pressed to reset the tripping mechanism, the reset button 20 triggers all the micro switches 50 through the trigger portion 212, so that all the micro switches 50 are closed. When the reset button 20 pops up, the reset button 20 drives the trigger portion 212 to separate from all the micro switches 50, so that all the micro switches 50 are disconnected. All the micro switches 50 are arranged side by side so that the resistance portion can simultaneously control the opening and closing of the micro switches 50, thereby reducing the volume of the entire leakage circuit breaker.

[0021] All micro switches 50 are normally open micro switches 50. The normally open micro switches 50 are in an open circuit state when not triggered by the triggering portion 212, and a circuit is formed when the triggering portion 212 contacts the micro switches 50.

[0022] Each pair of connection terminals 40 includes a power terminal and a load terminal, and the rectifier circuit board 30 is connected to the power terminal or the load terminal through a micro switch 50. The micro switch 50 can disconnect the circuit on the power side of the rectifier circuit board 30, or disconnect the circuit on the load side of the rectifier circuit board 30. Regardless of which side of the circuit is disconnected, it can play the role of disconnecting the internal rectifier circuit board 30 loop. The power terminal and the load terminal can be interchanged at will. In the wiring, the one connected to the live wire is the power terminal, so it is not shown in the drawings.

[0023] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A micro switch controlled power-off leakage circuit breaker, comprising a housing (10), wherein a reset button (20), a tripping mechanism, a rectifier circuit board (30) and a wiring terminal (40) are arranged in the housing (10), wherein the reset button (20) is connected to the tripping mechanism to drive the tripping mechanism to reset, and the rectifier circuit board (30) is connected to the wiring terminal (40), characterized in that: A micro switch (50) is arranged in the housing (10), a trigger member (21) is arranged below the reset button (20), the micro switch (50) is located below the trigger member (21), and the rectifier circuit board (30) is connected to the wiring terminal (40) via the micro switch (50); When the reset button (20) is pressed to reset the tripping mechanism, the trigger member (21) triggers the micro switch (50), causing the micro switch (50) to close; When the reset button (20) pops up, the trigger member (21) separates from the micro switch (50), causing the micro switch (50) to be disconnected.

2. A micro switch controlled leakage circuit breaker according to claim 1, characterized in that: The connection terminals (40) are provided in multiple pairs, the rectifier circuit board (30) is connected in series between each pair of connection terminals (40), and a micro switch (50) is connected between each pair of connection terminals (40).

3. A micro switch controlled leakage circuit breaker according to claim 2, characterized in that: Two pairs of the connection terminals (40) are provided, and a micro switch (50) is connected in series between the two pairs of the connection terminals (40).

4. A micro switch controlled leakage circuit breaker according to claim 2, characterized in that: Three pairs of connection terminals (40) are provided, and a micro switch (50) is connected in series between each of the three pairs of connection terminals (40).

5. A micro switch controlled leakage circuit breaker according to claim 2, characterized in that: Each of the micro switches (50) is arranged side by side below the trigger member (21).

6. A micro switch controlled leakage circuit breaker according to claim 5, characterized in that: The trigger member (21) comprises a connecting portion (211) and a trigger portion (212); one end of the connecting portion (211) is connected to the bottom of the reset button (20); the other end of the connecting portion (211) is connected to the trigger portion (212); and the trigger portion (212) is located above each micro switch (50); When the reset button (20) is pressed to reset the tripping mechanism, the reset button (20) triggers all micro switches (50) through the triggering part (212), so that all the micro switches (50) are closed; When the reset button (20) pops up, the reset button (20) drives the trigger part (212) to separate from all the micro switches (50), so that all the micro switches (50) are disconnected.

7. A micro switch controlled leakage circuit breaker according to claim 6, characterized in that: All of the micro switches (50) are normally open micro switches (50).

8. A micro switch controlled leakage circuit breaker according to any one of claims 2 to 7, characterized in that: Each pair of the connection terminals (40) includes a power terminal and a load terminal, and the rectifier circuit board (30) is connected to the power terminal or the load terminal via a micro switch (50).

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