Residual-current circuit breaker capable of cutting off power

Abstract

The utility model relates to a power-off residual-current circuit breaker, 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, and a switch assembly is arranged in the shell and used for driving the tripping mechanism to reset. The rectification circuit board is connected with the wiring terminal through the switch assembly. The switch assembly is located below the reset button, and an abutting piece extends out of the lower portion of the reset button. When the reset button is pressed down to drive the tripping mechanism to reset, the abutting piece abuts against the switch assembly, so that the switch assembly is closed. When the reset button bounces, the abutting piece is separated from the switch assembly, so that the switch assembly is disconnected. The switch assembly is connected between the rectification circuit board and the wiring terminal, the switch assembly is in linkage with the reset button, when the reset button is pressed down, the switch assembly is closed to enable the rectification circuit board to be powered on, and when the reset button bounces, the switch assembly is disconnected to enable the rectification circuit board to be powered off.

Description

Technical Field

[0001] The utility model relates to the field of leakage circuit breakers, and more specifically, to a leakage circuit breaker capable of cutting off power. 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 capable of powering off, in which a switch assembly is arranged between a rectifier circuit board and a connection terminal, so as to cut off the circuit of the rectifier circuit board after powering off.

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

[0006] A power-off leakage circuit breaker includes 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 switch assembly is arranged in the housing, and the rectifier circuit board is connected to the wiring terminal through the switch assembly;

[0007] The switch assembly is located below the reset button, and a resisting member extends below the reset button;

[0008] When the reset button is pressed to reset the tripping mechanism, the abutment member abuts against the switch assembly, closing the switch assembly.

[0009] When the reset button pops up, the resisting member is separated from the switch assembly, so that the switch assembly is disconnected.

[0010] To sum up, the above technical scheme has the following beneficial effects: after the traditional leakage circuit breaker is disconnected, the tripping mechanism will be disconnected, thereby breaking 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 the present application, a switch component is connected between the rectifier circuit board and the terminals, so that the switch component and the reset button are linked. When the reset button is pressed, the switch component is closed to power on the rectifier circuit board. When the reset button pops up, the switch component is disconnected to cut off the power to the rectifier circuit board, so that when the leakage circuit breaker disconnects the external circuit, the internal power supply circuit is also disconnected, making the line safer after a circuit failure and reducing the possibility of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a housing of a residual current circuit breaker capable of disconnecting power;

[0012] Figure 2 A schematic diagram of a reset button of a residual current circuit breaker capable of cutting off power;

[0013] Figure 3 A schematic diagram of a third fixing block of a residual current circuit breaker capable of disconnecting power;

[0014] Figure 4 It is a schematic diagram of a moving part of a leakage circuit breaker capable of cutting off power;

[0015] Figure 5 The present invention is a schematic diagram of a fixing part of a residual current circuit breaker capable of cutting off power.

[0016] Figure numerals: 10, housing; 11, first fixing block; 12, second fixing block; 13, third fixing block; 131, rib; 20, reset button; 30, rectifier circuit board; 40, terminal; 50, switch assembly; 51, moving part; 511, bending part; 512, engaging part; 513, elastic part; 52, fixing part; 521, ring part; 522, connecting part. DETAILED DESCRIPTION

[0017] 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.

[0018] like Figures 1-5As shown, a power-off residual current circuit breaker includes a housing 10, in which a reset button 20, a tripping mechanism, a rectifier circuit board 30 and a terminal 40 are arranged. The reset button 20 is connected to the tripping mechanism to drive the tripping mechanism to reset. The rectifier circuit board 30 is connected to the terminal 40. A switch assembly 50 is arranged in the housing 10, and the rectifier circuit board 30 is connected to the terminal 40 through the switch assembly 50; the switch assembly 50 is located below the reset button 20, and a resisting member extends from the bottom of the reset button 20; when the reset button 20 is pressed to drive the tripping mechanism to reset, the resisting member resists the switch assembly 50, so that the switch assembly 50 is closed; when the reset button 20 pops up, the resisting member is separated from the switch assembly 50, so that the switch assembly 50 is disconnected. After the traditional leakage circuit breaker is disconnected, the tripping mechanism will be disconnected to break the circuit between the two terminals 40, and the reset button 20 will also pop up, but the rectifier circuit board 30 is still connected to the two terminals 40 for operation. In this application, a switch assembly 50 is connected between the rectifier circuit board 30 and the terminals 40, so that the switch assembly 50 and the reset button 20 are linked. When the reset button 20 is pressed, the switch assembly 50 is closed to energize the rectifier circuit board 30. When the reset button 20 pops up, the switch assembly 50 is disconnected to cut off the power to the rectifier circuit board 30, 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, so they are not shown in the drawings.

[0019] The switch assembly 50 includes a moving member 51 and a fixing member 52. The first end of the moving member 51 is fixed in the housing 10, and the second end extends to the bottom of the abutment member. The fixing member 52 is fixed in the housing 10 and the bottom of the moving member 51. When the reset button 20 is pressed to reset the tripping mechanism, the abutment member abuts the second end of the moving member 51, so that the second end of the moving member 51 abuts against the fixing member 52. When the reset button 20 pops up, the abutment member separates from the second end of the moving member 51, so that the second end of the moving member 51 and the fixing member 52 are disconnected. When the moving member 51 and the fixing member 52 are connected, the rectifier circuit board 30 is open, and when the moving member 51 and the fixing member 52 are separated, the rectifier circuit board 30 is disconnected. Among them, the moving member 51 can be connected to one side of the terminal 40, and the fixing member 52 can be connected to one side of the rectifier circuit board 30. Of course, the moving member 51 can also be connected to one side of the rectifier circuit board 30, and the fixing member 52 can be connected to one side of the terminal 40. The specific adjustment can be made according to the layout in the housing 10.

[0020] Inside the housing 10, a first fixing block 11, a second fixing block 12, and a third fixing block 13 are provided; the first fixing block 11 is disposed on one side of the second fixing block 12 and forms a clamping slot with the second fixing block 12. The moving member 51 includes a bent portion 511, a clamping portion 512, and an elastic portion 513 connected in sequence. The clamping portion 512 is stuck in the clamping slot, the bent portion 511 bends towards the first fixing block 11 or the second fixing block 12, and the elastic portion 513 extends to below the abutting member; the fixing member 52 includes an annular portion 521 and a connecting portion 522. The third fixing block 13 is located below the elastic portion 513. The annular portion 521 is sleeved on the third fixing block 13, and the connecting portion 522 is disposed on one side of the annular portion 521. Specifically, the bent portion 511 and the clamping portion 512 are the first end of the moving member 51. The clamping portion 512 is clamped in the clamping slot formed by the first fixing block 11 and the second fixing block 12. After the bent portion 511 is bent, it forms a certain angle with the clamping portion 512, so that the bent portion 511 is not easily detached, and the bent portion 511 is used to connect the rectifying circuit board 30 or the connection terminal 40. The elastic portion 513 and the clamping portion 512 also form a certain angle, and the elastic portion 513 has elasticity. When not under external force, the elastic portion 513 is separated from the annular portion 521. When subjected to external force, it can elastically change the angle with the clamping portion 512, so that it can be bent down to abut against the annular portion 521. After the replacement portion is sleeved on the third fixing block 13, it can be conductive all around, which is convenient for abutting and conducting with the elastic portion 513. The connecting portion 522 is located at any position outside the annular portion 521 and is used to connect the rectifying circuit board 30 or the connection terminal 40. When the reset button 20 is pressed to drive the tripping mechanism to reset, the abutting member abuts against the bent portion 511, causing the bent portion 511 to abut against the annular portion 521; when the reset button 20 pops up, the abutting member is separated from the bent portion 511, causing the bent portion 511 to be disconnected from the annular portion 521.

[0021] The third fixing block 13 is cylindrical, and a plurality of ribs 131 are provided on the side surface of the third fixing block 13. After the annular portion 521 is sleeved on the third fixing block 13, the ribs 131 can reduce the gap between the annular portion 521 and the third fixing block 13, making the annular portion 521 fixed more firmly.

[0022] The bent portion 511 is connected to the connection terminal 40, and the connecting portion 522 is connected to the rectifying circuit board 30.

[0023] The bent portion 511 is connected to the rectifying circuit board 30, and the connecting portion 522 is connected to the connection terminal 40. Either the bent portion 511 or the connecting portion 522 can be connected to the rectifying circuit board 30, which can be adjusted according to the internal structure of the housing 10.

[0024] The terminal block 40 includes a power terminal and a load terminal. The rectifying circuit board 30 is connected to the power terminal or the load terminal through the switch assembly 50. The switch assembly 50 can disconnect the circuit on the power supply side of the rectifying circuit board 30 or the circuit on the load side of the rectifying circuit board 30. Disconnecting either side of the circuit can play a role in disconnecting the loop of the internal rectifying circuit board 30. The power terminal and the load terminal can be swapped arbitrarily. During wiring, the terminal connected to the live wire is the power terminal, so it is not shown in the drawings.

[0025] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A power-off residual current 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 switch assembly (50) is disposed in the housing (10), and the rectifier circuit board (30) is connected to the connection terminal (40) via the switch assembly (50); The switch assembly (50) is located below the reset button (20), and a resisting member extends from below the reset button (20); When the reset button (20) is pressed to reset the tripping mechanism, the abutment member abuts against the switch assembly (50), causing the switch assembly (50) to close; When the reset button (20) pops up, the resisting member is separated from the switch assembly (50), causing the switch assembly (50) to be disconnected.

2. A power-off residual current circuit breaker according to claim 1, characterized in that: The switch assembly (50) comprises a moving member (51) and a fixing member (52), wherein a first end of the moving member (51) is fixed in the housing (10), and a second end extends below the abutment member, and the fixing member (52) is fixed below the moving member (51) in the housing (10); When the reset button (20) is pressed to reset the tripping mechanism, the abutment member abuts against the second end of the moving member (51), causing the second end of the moving member (51) to abut against the fixing member (52); When the reset button (20) pops up, the resisting member is separated from the second end of the movable member (51), so that the second end of the movable member (51) and the fixing member (52) are disconnected.

3. A power-off residual current circuit breaker according to claim 2, characterized in that: A first fixing block (11), a second fixing block (12) and a third fixing block (13) are arranged in the housing (10); The first fixing block (11) is arranged on one side of the second fixing block (12) and forms a slot with the second fixing block (12); the movable member (51) comprises a bending portion (511), a clamping portion (512) and an elastic portion (513) which are connected in sequence; the clamping portion (512) is clamped in the slot; the bending portion (511) is bent toward the first fixing block (11) or the second fixing block (12); and the elastic portion (513) extends to the bottom of the abutment member; The fixing member (52) comprises a ring portion (521) and a connecting portion (522); the third fixing block (13) is located below the elastic portion (513); the ring portion (521) is sleeved on the third fixing block (13); and the connecting portion (522) is arranged on one side of the ring portion (521).

4. A power-off residual current circuit breaker according to claim 3, characterized in that: The third fixing block (13) is cylindrical, and a plurality of ribs (131) are provided on the side surface of the third fixing block (13).

5. A power-off residual current circuit breaker according to claim 3, characterized in that: The bending portion (511) is connected to the connection terminal (40), and the connecting portion (522) is connected to the rectifier circuit board (30).

6. A power-off residual current circuit breaker according to claim 3, characterized in that: The bending portion (511) is connected to the rectifier circuit board (30), and the connecting portion (522) is connected to the connecting terminal (40).

7. A power-off residual current circuit breaker according to any one of claims 1 to 6, characterized in that: The connection terminal (40) comprises 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 switch component (50).

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