CN214850442U

CN214850442U - Circuit with indication function and leakage protection plug

Info

Publication number: CN214850442U
Application number: CN202120158074.3U
Authority: CN
Inventors: 杨俊托
Original assignee: Dongguan City Tuocheng Industries Co Ltd
Current assignee: Dongguan City Tuocheng Industries Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-11-23
Anticipated expiration: 2031-01-20

Abstract

The utility model belongs to the technical field of the earth leakage protection technique and specifically relates to indicate a circuit and earth leakage protection plug with instruction function, including timing chip U2, time switch S4 and a plurality of LED lamp, time switch S4 'S first switch end is connected with timing chip U2' S input, and time switch S4 'S second switch end ground connection, the positive pole of a plurality of LED lamps is connected with timing chip U2' S output respectively, the equal ground connection of negative pole of a plurality of LED lamps. The utility model discloses an output at timing chip sets up a plurality of LED lamps in order to instruct for it is long when the user can learn regularly.

Description

Circuit with indication function and leakage protection plug

Technical Field

The utility model belongs to the technical field of the earth leakage protection technique and specifically relates to indicate a circuit and earth leakage protection plug with instruction function.

Background

In order to protect the safety of users and improve the practicability of plugs, an earth leakage protection function and a timing function are added into many plugs, but the plugs often have no indication, so that the users cannot know how long the timing time set by the users is.

Disclosure of Invention

The utility model provides a circuit with instruction function to prior art's problem for it is long when the user can know the timing of settlement.

The utility model adopts the following technical scheme: a circuit with an indication function comprises a timing chip U2, an isolating switch U3, a rectifying module D3, a switch tube Q4, a switch tube Q3, a resistor R21, a resistor R26, a resistor R16, a capacitor C11, a zero sequence transformer, a microprocessor U1, a circuit breaker X1, a timing switch S4 and a plurality of LED lamps, wherein a first switch end of the timing switch S4 is connected with an input end of the timing chip U2, a second switch end of the timing switch S4 is grounded, anodes of the LED lamps are respectively connected with an output end of the timing chip U2, cathodes of the LED lamps are grounded, an output end of the timing chip U2 is connected with a control end of the isolating switch U3, an input end of a rectifying module D3 is connected with an external alternating current power supply, a first switch end of the isolating switch U3 is connected with an output end of the rectifying module D3 through a resistor R26, a first switch end of the switch tube Q3 is connected with an output end of the rectifying module D3 through a resistor R16, the second switch end of the isolating switch U3 and the second switch end of the switch tube Q3 are grounded respectively, the output end of the rectifying module D3 is connected with the control end of the breaker X1, one end of the resistor R21 is connected with an external alternating current power supply, the first switch end of the switch tube Q4 and the control end of the switch tube Q3 are connected with the other end of the resistor R21 respectively, the second switch end of the switch tube Q4 is grounded, the capacitor C11 is connected between the first switch end and the second switch end of the switch tube Q4 in parallel, the output end of the zero sequence transformer is connected with the first input end of the microprocessor U1, and the output end of the microprocessor U1 is connected with the control end of the switch tube Q4.

Preferably, the circuit with the indication function further comprises a thyristor SCR, the second switch end of the switch tube Q3 is grounded through the thyristor SCR, and the control end of the thyristor SCR is connected with the output end of the microprocessor.

The utility model also provides a leakage protection plug with instruction function, including zero line input, live wire input, the zero line output of being connected with zero line input electricity, the live wire output of being connected with the live wire input electricity and the circuit of circuit with instruction function, the piece X1 that opens circuit is used for ordering about zero line input and zero line output and is used for ordering about the live wire input and opens circuit with the live wire output.

As preferred, the earth leakage protection plug with instruction function still includes the shell, the button spare of being connected with the casing and all set up waterproof elastic sheet, connecting terminal, elasticity reset piece, fixing base and the PCB board inside the shell, the circuit set up in the PCB board, the fixing base is connected with the PCB board, connecting terminal and fixing base sliding connection, the PCB board is equipped with the contact, the shell is equipped with and is used for supplying the button spare to stretch into the inside through-hole of shell, and waterproof elastic sheet is located between button spare and the connecting terminal, and button spare orders about connecting terminal and contact through the waterproof elastic sheet of contradicting, and elasticity resets and is used for ordering about connecting terminal and contact separation, is used for hiding the through-hole.

Preferably, the connection terminal includes a terminal connection portion, a first terminal portion bent from one end of the terminal connection portion, and a second terminal portion bent from the other end of the terminal connection portion, the contact includes a first contact portion for contacting the first terminal portion and a second contact portion for contacting the second terminal portion, and the terminal connection portion abuts against the waterproof elastic piece.

Preferably, one end of the elastic resetting piece is connected with the PCB or the fixing seat, and the other end of the elastic resetting piece is connected with the connecting terminal.

The utility model has the advantages that: through setting up a plurality of LED lamps in order to instruct at the output of timing chip for the user can learn the timing length of time.

Drawings

Fig. 1 is a circuit diagram of the present invention.

Fig. 2 is a three-dimensional structure diagram of the leakage protection plug of the present invention.

Fig. 3 is an exploded view of the earth leakage protection plug of the present invention.

Fig. 4 is an enlarged schematic view of a portion a in fig. 3.

As the icon is marked as: 1. a fixed seat; 2. a zero sequence transformer; 3. a zero line input end; 4. a live wire input end; 5. a zero line output end; 6. a live line output; 7. a housing; 71. a key member; 72. A waterproof elastic sheet; 73. an elastic reset member; 75. a through hole; 8. a connection terminal; 81. a terminal connecting portion; 82. a first terminal portion; 83. a second terminal portion; 9. a PCB board; 91. a contact; 92. a first contact portion; 93. a second contact portion; 94. an LED lamp.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, a circuit with an indication function includes a timing chip U2, a disconnecting switch U3, a rectification module D3, a switch tube Q4, a switch tube Q3, a resistor R21, a resistor R26, a resistor R16, a capacitor C11, a zero sequence transformer 2, a microprocessor U1, a breaker X1, a timing switch S4, and a plurality of LED lamps 94, wherein a first switch end of the timing switch S4 is connected to an input end of the timing chip U2, a second switch end of the timing switch S4 is grounded, anodes of the plurality of LED lamps 94 are respectively connected to an output end of the timing chip U2, cathodes of the plurality of LED lamps 94 are grounded, an output end of the timing chip U2 is connected to a control end of the disconnecting switch U3, an input end of the rectification module D3 is connected to an external ac power supply, a first switch end of the disconnecting switch U3 is connected to an output end of the rectification module D3 through a resistor R26, and a first switch end of the switch Q3 is connected to an output end of the rectification module 3, the second switch end of the isolating switch U3 and the second switch end of the switch tube Q3 are grounded respectively, the output end of the rectifying module D3 is connected with the control end of the breaker X1, one end of the resistor R21 is connected with an external alternating current power supply, the first switch end of the switch tube Q4 and the control end of the switch tube Q3 are connected with the other end of the resistor R21 respectively, the second switch end of the switch tube Q4 is grounded, the capacitor C11 is connected between the first switch end and the second switch end of the switch tube Q4 in parallel, the output end of the zero sequence transformer 2 is connected with the first input end of the microprocessor U1, and the output end of the microprocessor U1 is connected with the control end of the switch tube Q4.

The timing chip U2 sets the timing time by detecting the number of times of the timing switch S4, and indicates the set timing length by the number of times of lighting of the LED lamp 94. The timing chip U2 is specifically an electromagnet and a switch arranged in a power supply loop through detecting the breaker X1, when the two ends of the breaker X1 have pressure difference, the electromagnet is magnetic and adsorbs the switch in the power supply loop to disconnect the switch and break the power supply loop; when there is no pressure difference across the circuit breaker X1, the electromagnet is not magnetic, and the switch in the power circuit is closed, and the power circuit is made conductive. The specific working process of the circuit is as follows: the timing chip U2 outputs a turn-off signal within a predetermined time, so that the resistor R26 is not grounded and the voltage difference between two ends of the circuit breaker X1 cannot be caused; in a preset time, when the zero sequence transformer 2 does not detect the occurrence of electric leakage, the microprocessor U1 controls the switching tube Q4 to be switched on to enable the switching tube Q3 to be switched off, and at the moment, no pressure difference exists between two ends of the circuit breaking piece X1, when the zero sequence transformer 2 detects the occurrence of electric leakage, the microprocessor U1 controls the switching tube Q4 to be switched off to enable the switching tube Q3 to be switched on, and at the moment, a pressure difference exists between two ends of the circuit breaking piece X1; the timing chip U2 outputs a turn-on signal during a non-predetermined time, which causes the resistor R26 to be grounded, when a voltage difference is present across the circuit breaker X1.

As shown in fig. 1, the circuit with indication function further includes a thyristor SCR, the second switch terminal of the switch Q3 is grounded through the thyristor SCR, and the control terminal of the thyristor SCR is connected to the output terminal of the microprocessor, so that the microprocessor U1 can further control the breaker X1 through the thyristor SCR.

As shown in fig. 1, a leakage protection plug with instruction function, including zero line input 3, live wire input 4, with zero line output 5 that zero line input 3 electricity is connected, live wire output 6 and the above-mentioned circuit of being connected with live wire input 4 electricity, the piece X1 that opens circuit is used for ordering about zero line input 3 and zero line output 5 to open circuit and is used for ordering about live wire input 4 and live wire output 6 to open circuit for leakage protection plug has the function of instructing regularly for a long time.

As shown in fig. 2 to 4, the earth leakage protection plug with indication function further includes a shell 7, a button member 71 connected with the shell, and a waterproof elastic sheet 72, a connection terminal 8, an elastic reset member 73, a fixing seat 1 and a PCB 9 which are all arranged inside the shell 7, the circuit is arranged on the PCB 9, the fixing seat 1 is connected with the PCB 9, the connection terminal 8 is slidably connected with the fixing seat 1, the PCB 9 is provided with a contact 91, the shell 7 is provided with a through hole 75 for the button member 71 to extend into the shell 7, the waterproof elastic sheet 72 is arranged between the button member 71 and the connection terminal 8, the button member 71 drives the connection terminal 8 to contact with the contact 91 through the abutting waterproof elastic sheet 72, and the elastic reset member 73 is used for driving the connection terminal 8 to separate from the contact 91 and is used for covering the through hole 75. In a conventional design, a waterproof ring is provided between the key and the housing 7 to prevent water from flowing into the inside of the housing 7 from a gap between the key and the waterproof ring or a gap between the waterproof ring and the housing 7. In the above embodiment, the waterproof elastic sheet 72 has no hole and is attached to the housing 7, the waterproof elastic sheet 72 covers the through hole 75, the key member 71 drives the connecting terminal 8 to move only by abutting against the waterproof elastic sheet 72 so as to make the connecting terminal 8 abut against the contact 91 on the PCB board 9, and water is difficult to flow into the housing 7 from the joint of the connecting member and the housing 7, so that the waterproof performance of the earth-leakage protector is improved. After the connection terminal 8 contacts the terminal point on the PCB board 9, the elastic reset member 73 drives the connection terminal 8 to reset, thereby separating the connection terminal 8 from the contact 91 of the PCB board 97.

As shown in fig. 4, the connection terminal 8 includes a terminal connection portion 81, a first terminal portion 82 formed by bending one end of the terminal connection portion 81, and a second terminal portion 83 formed by bending the other end of the terminal connection portion 81, the contact 91 includes a first contact portion 92 for contacting the first terminal portion 82 and a second contact portion 93 for contacting the second terminal portion 83, and the terminal connection portion 81 abuts against the waterproof elastic piece 72. When the key member 71 is pressed, the first terminal portion 82 of the connection terminal 8 contacts the first contact portion 92 of the contact 91, and the second terminal portion 83 of the connection terminal 8 contacts the second contact portion 93 of the contact 91, whereby conduction between the first contact portion 92 and the second contact portion 93 is achieved. The terminal connecting portion 81 is adapted to abut against the waterproof elastic piece 72 and the first terminal portion 82 and the second terminal portion 83 are respectively located at both ends of the terminal connecting portion 81, thereby ensuring that both the first terminal portion 82 and the second terminal portion 83 can stably contact the contact 91 after the key member 71 is pressed.

As shown in fig. 4, one end of the elastic reset member 73 is connected to the PCB board 9 or the fixing base 1, and the other end of the elastic reset member 73 is connected to the connection terminal 8, so that the reset of the connection terminal 8 is achieved through a simple structure. The elastic restoring member 73 is embodied as a spring.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A circuit with an indication function, characterized in that: the LED lamp timing circuit comprises a timing chip U2, an isolating switch U3, a rectifying module D3, a switch tube Q4, a switch tube Q3, a resistor R21, a resistor R26, a resistor R16, a capacitor C11, a zero sequence transformer, a microprocessor U1, a circuit breaker X1, a timing switch S4 and a plurality of LED lamps, wherein a first switch end of the timing switch S4 is connected with an input end of the timing chip U2, a second switch end of the timing switch S4 is grounded, anodes of the plurality of LED lamps are respectively connected with an output end of the timing chip U2, cathodes of the plurality of LED lamps are all grounded, an output end of the timing chip U2 is connected with a control end of the isolating switch U3, an input end of the rectifying module D3 is connected with an external alternating current power supply, a first switch end of the isolating switch U3 is connected with an output end of the rectifying module D3 through a resistor R3, a second switch end of the isolating switch Q3 is respectively connected with a second switch end of the rectifying module D3, the output end of the rectifying module D3 is connected with the control end of the breaker X1, one end of the resistor R21 is connected with an external alternating current power supply, the first switch end of the switch tube Q4 and the control end of the switch tube Q3 are respectively connected with the other end of the resistor R21, the second switch end of the switch tube Q4 is grounded, the capacitor C11 is connected between the first switch end and the second switch end of the switch tube Q4 in parallel, the output end of the zero-sequence transformer is connected with the first input end of the microprocessor U1, and the output end of the microprocessor U1 is connected with the control end of the switch tube Q4.

2. A circuit with indication function according to claim 1, characterized in that: the circuit with the indication function further comprises a thyristor SCR, a second switch end of the switch tube Q3 is grounded through the thyristor SCR, and a control end of the thyristor SCR is connected with an output end of the microprocessor.

3. The utility model provides a leakage protection plug with instruction function which characterized in that: the circuit comprises a zero line input end, a live line input end, a zero line output end electrically connected with the zero line input end, a live line output end electrically connected with the live line input end and the circuit of any claim of 1-2, wherein the circuit breaking piece X1 is used for driving the zero line input end and the zero line output end to be broken and driving the live line input end and the live line output end to be broken.

4. A residual current protection plug with indication function according to claim 3, characterized in that: leakage protection plug with instruction function still includes the shell, the button spare of being connected with the casing and all sets up waterproof elastic sheet, connecting terminal, elasticity reset piece, fixing base and the PCB board inside the shell, the circuit set up in the PCB board, the fixing base is connected with the PCB board, connecting terminal and fixing base sliding connection, the PCB board is equipped with the contact, the shell is equipped with and is used for supplying button spare to stretch into the inside through-hole of shell, and waterproof elastic sheet is located between button spare and the connecting terminal, and button spare orders about connecting terminal and contact through the waterproof elastic sheet of contradicting, and elasticity resets and is used for ordering about connecting terminal and contact separation, is used for coveing the through-hole.

5. A leakage protection plug with indication function according to claim 4, characterized in that: the connecting terminal comprises a terminal connecting portion, a first terminal portion formed by bending one end of the terminal connecting portion and a second terminal portion formed by bending the other end of the terminal connecting portion, the contact comprises a first contact portion used for contacting the first terminal portion and a second contact portion used for contacting the second terminal portion, and the terminal connecting portion abuts against the waterproof elastic sheet.

6. A leakage protection plug with indication function according to claim 4, characterized in that: one end of the elastic reset piece is connected with the PCB or the fixing seat, and the other end of the elastic reset piece is connected with the connecting terminal.