CN214542647U - Socket anti-electric shock circuit and socket - Google Patents

Abstract

The utility model discloses a socket protection against electric shock circuit and socket, including control module, first detection module, first switch and second switch, wherein, control module is connected with first detection module, first switch and second switch respectively; the first detection module is connected with the first jack and the second jack of the socket to form a detection circuit; the first switch is connected between the live wire access end of the socket and the first metal elastic sheet of the first jack; and the second switch is connected between the zero line access end of the socket and the first metal elastic sheet of the second jack. By adopting the socket anti-electric shock circuit, the closed-loop control of the socket is realized, and the reliability and the safety of the socket in use and idling are guaranteed.

Description

Socket anti-electric shock circuit and socket

Technical Field

The utility model belongs to the technical field of the socket, in particular to socket protection against electric shock circuit and socket.

Background

The socket is used for distributing electric energy in a power grid, is an electrical element which is most widely used in daily life and industrial production, and is directly related to electricity utilization safety in the process of completing electric energy connection from mains supply voltage to electric equipment. After the socket is powered on, the metal elastic pieces in the jacks are in a charged state, so that a user can get an electric shock when plugging and unplugging the plug of the electric equipment because the user has water on the hand or accidentally touches the plug, and particularly when a child is in a home, the user is easy to touch the jacks of the socket by mistake due to curiosity, and serious harm is easily caused.

Therefore, how to provide an intelligent anti-electric shock socket is becoming an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a socket protection against electric shock circuit and socket has improved the security and the reliability of socket.

The utility model aims to provide a socket electric shock prevention method, which comprises the following steps,

the socket is connected with a power supply;

the control module controls the first detection module to start and judges whether a first feedback signal output by the first detection module is received within a first preset time, wherein,

when the control module receives a first feedback signal within a first preset time, the first insertion piece and the second insertion piece are respectively inserted into the first jack and the second jack within the first preset time, and the control module controls the first switch and the second switch to be switched on.

Optionally, the first preset time is a time difference between a first time taken by the first plug-in strip to be inserted into the first jack and a second time taken by the second plug-in strip to be inserted into the second jack.

Optionally, the time difference is no more than 2 seconds.

Optionally, the method further comprises the step of,

after the second switch and the second switch are conducted, the second detection module starts to work;

the second detection module detects whether the voltage between the first jack and the second jack is a preset voltage, wherein,

and if the second detection module detects the preset voltage, generating a second feedback signal and feeding the second feedback signal back to the control module.

Optionally, the method further comprises the step of,

the control module judges whether a second feedback signal fed back by the second detection module is received within a second preset time, wherein,

if the control module receives a second feedback signal fed back by the second detection module within a second preset time, the control module controls the first switch and the second switch to be kept on;

and if the control module does not receive a second feedback signal fed back by the second detection module within a second preset time, the control module controls the first switch and the second switch to be switched off.

Another object of the present invention is to provide a socket anti-electric shock circuit, which comprises a control module, a first detection module, a first switch and a second switch, wherein,

the control module is respectively connected with the first detection module, the first switch and the second switch;

the first detection module is connected with the first jack and the second jack of the socket to form a detection circuit;

the first switch is connected between the live wire access end of the socket and the first metal elastic sheet of the first jack;

and the second switch is connected between the zero line access end of the socket and the first metal elastic sheet of the second jack.

Optionally, the first detection module comprises a dual switch and a first resistor, wherein,

the double switches are arranged on two lines, one ends of the two lines are respectively connected with a first signal receiving end and a grounding end of the control module, and the other ends of the two lines are respectively connected with a first metal elastic sheet of the first jack and a first metal elastic sheet of the second jack;

one end of the first resistor is connected with the second metal elastic sheet of the first jack, and the other end of the first resistor is connected with the second metal elastic sheet of the second jack.

Optionally, a second detection module is included, wherein,

the first end of the second detection module is connected with the second metal elastic sheet of the first jack, the second end of the second detection module is connected with the second metal elastic sheet of the second jack, and the third end of the second detection module is connected with the second signal receiving end of the control module.

Optionally, the second detection module comprises an optocoupler, a photodiode, a second resistor, and a first diode, wherein,

a first end of the optocoupler is connected with one end of the second resistor, a second end of the optocoupler is connected with the anode of the photodiode, and a third end of the optocoupler is connected with a second signal receiving end of the control module;

the other end of the second resistor is connected with the cathode of the first diode;

the anode of the first diode is connected with one end of the first resistor;

and the cathode of the photodiode is connected with the other end of the first resistor.

Another object of the present invention is to provide a socket, including the above socket anti-electric shock circuit.

The utility model discloses a socket protection against electric shock method and circuit forms control circuit through control module, first detection module, first switch and second switch for whether control module can judge whether there is the inserted sheet and insert the jack of socket effectively, thereby realize the closed-loop control of socket when using, increased the reliability and the security of socket. In addition, detection module realizes monitoring the socket at normal during operation again to detection module and control module realize the dual closed-loop control to the socket together, make the socket whether at operating condition, all have the protection against electric shock function, thereby make the security and the reliability of socket higher, promote user and use experience.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of a socket electric shock protection circuit in an embodiment of the present invention;

fig. 2 is a schematic diagram of another socket electric shock protection circuit structure in an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a work flow of another socket anti-shock circuit according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention may be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The socket electric shock protection method and circuit provided by the embodiment of the present invention are described in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

The embodiment of the utility model provides an electric shock prevention method for a socket, which comprises that firstly, the socket is connected with a power supply; then, the control module controls the first detection module to start and judges whether a first feedback signal output by the first detection module is received within a first preset time, wherein when the control module receives the first feedback signal within the first preset time, a first insertion sheet and a second insertion sheet are respectively inserted into the first jack and the second jack within the first preset time, and the control module controls the first switch and the second switch to be switched on. The socket anti-electric shock method realizes closed-loop control on the socket, and guarantees the reliability and safety of the socket when the socket is idle and used.

Further, the first preset time is a time difference between a first time for the first plug-in strip to be inserted into the first jack and a second time for the second plug-in strip to be inserted into the second jack, and the time difference is not more than 2 seconds. The time that two inserting pieces of a socket are inserted into the socket jacks simultaneously or successively is within 2s, the first switch and the second switch can be switched on, so that the socket can supply power to the electrical equipment, namely the socket has a safety verification function before normal use, and whether the inserting pieces of the plug of the electrical equipment are correctly inserted is verified, so that the possibility that a user touches the socket jacks connected with commercial power to get an electric shock when plugging and unplugging the plug of the electrical equipment or carelessly is avoided, and the use safety of the socket is improved.

Furthermore, the socket electric shock prevention method further comprises the step that after the first switch and the second switch are conducted, the second detection module starts to work; the second detection module detects whether the voltage between the first jack and the second jack is a preset voltage, wherein if the second detection module detects the preset voltage, a second feedback signal is generated and fed back to the control module. Further, the control module judges whether a second feedback signal fed back by the second detection module is received within a second preset time, wherein if the control module receives the second feedback signal fed back by the second detection module within the second preset time, the control module controls the first switch and the second switch to be kept on; and if the control module does not receive a second feedback signal fed back by the second detection module within a second preset time, the control module controls the first switch and the second switch to be switched off. Thereby through the second detection module when the socket normally works, carry out real-time supervision to the socket, can avoid appearing the condition emergence of electric shock accident in the socket normal use process effectively, with the start control that control module carried out it when starting the socket forms the dual closed-loop control that uses the socket jointly for whether be in user state to socket protection against electric shock design intelligence more, the security and the reliability of socket have all obtained the guarantee.

The embodiment of the utility model also provides a socket protection against electric shock circuit that can carry out above-mentioned socket protection against electric shock method is introduced, the circuit includes control module, first detection module, second detection module, first switch and second switch, wherein, control module is connected with first detection module, second detection module, first switch and second switch respectively; the first detection module is connected with the first jack and the second jack of the socket to form a detection circuit; the first switch is connected between the live wire access end of the socket and the first metal elastic sheet of the first jack; and the second switch is connected between the zero line access end of the socket and the first metal elastic sheet of the second jack. And the first end of the second detection module is connected with the second metal elastic sheet of the first jack, the second end of the second detection module is connected with the second metal elastic sheet of the second jack, and the third end of the second detection module is connected with the second signal receiving end of the control module. Therefore, the control module, the first detection module, the second detection module, the first switch and the second switch jointly act to realize double closed-loop control on the socket, and the reliability and the safety of the use of the socket are improved.

For example, please refer to fig. 1, a schematic diagram of an anti-electric shock circuit of a socket is introduced (a first detection module is omitted), the control module includes 8 pin numbers respectively representing connection ends, where pin 1 and pin 2 are respectively connected to a live line L access end and a neutral line N access end of the socket, pin 3 is connected to a first switch S1 and a second switch S2, pin 4 is connected to a first metal elastic sheet L1 of a first jack, pin 5 is connected to a first metal elastic sheet N1 of a second jack, both pins 4 and 5 are directly connected to corresponding jacks during operation of the first detection module, and similarly, pin 6 is connected to a second metal elastic sheet L2 of the first jack, and pin 7 is connected to a second metal elastic sheet N2 of the second jack. Further, after the socket is connected with a 220V power supply, the control module is connected with a voltage through a pin 1 and a pin 2, the control module starts to work, then the control module outputs a start signal through pins 4 and 5 to enable the first detection module to be conducted, so that a path is formed between the control module and the jack, and simultaneously, preferentially, the control module outputs a first feedback signal through pins 4 and 5, and pins 6 and 7 are used for receiving the first feedback signal, namely, if a first plug-in piece J1 and a second plug-in piece J2 are respectively inserted into the first jack and the second jack within a preset time, a first metal elastic piece L1 and a second metal elastic piece L2 of the first jack are communicated, a first metal elastic piece N1 and a second metal elastic piece N2 of the second jack are communicated, a loop is formed between the pin 4 and the pin 6 of the control module, and a loop is formed between the pin 5 and the pin 7, so that the pin 6 and the pin 7 of the control module can receive the corresponding first feedback signal, the first feedback signal may be sent by the control module itself. Further preferably, a resistor is provided between pin 6 and pin 7, and the first feedback signal is a first current signal in the resistor. When the control module receives the first feedback signal, the control module controls the starting signal output of the disconnection pin 4 and the pin 5, and simultaneously the starting pin 3 controls the first switch S1 and the second switch S2 to be switched on, so that after the first switch S1 and the second switch S2 are switched on, the first metal elastic sheet and the second metal elastic sheet of the first jack and the first metal elastic sheet and the second metal elastic sheet of the second jack respectively output voltage to the first plug-in sheet J1 and the second plug-in sheet J2 in an electrified manner. Further, the second detection module detects 220V voltage between the second metal dome L2 of the first jack and the second metal dome N2 of the second jack, and generates a second feedback signal to the control module, if the detection module does not detect voltage between the second metal dome L2 of the first jack and the second metal dome N2 of the second jack, then the second feedback signal will not be fed back, and the control module will control the first switch S1 and the second switch S2 to turn off. Further, the second feedback signal may be a voltage signal between the second metal dome L2 of the first jack and the second metal dome N2 of the second jack, and if the voltage between the second metal dome L2 of the first jack and the second metal dome N2 of the second jack is not a preset voltage or does not have a voltage, no feedback is performed, that is, the control module cannot receive the voltage signal.

In this embodiment, the preset time is a time difference between a first time when the first plug-in piece J1 is inserted into the first jack and a second time when the second plug-in piece J2 is inserted into the second jack. The time difference is 0-2 seconds. Specifically, when a single blade of the first blade J1 and the second blade J2 is inserted into any one of the jacks, the control module does not activate pin 3, so that the first switch S1 and the second switch S2 remain off. When the first inserting piece J1 and the second inserting piece J2 are inserted, the time is more than 2S (seconds), the control module does not start the pin 3, and the first switch S1 and the second switch S2 are kept off. Whether the socket is in standard use is determined by the control module, so that closed-loop control is formed on the socket, and the reliability and safety of the use of the socket are improved.

In this embodiment, the socket electric shock protection circuit further includes an electric energy conversion circuit for supplying electric energy to the control module, the first detection module, the second detection module, the first switch, the second switch, and the like in the socket electric shock protection circuit.

In this embodiment, the second detection module includes an optical coupler, and the optical coupler is connected to the second metal dome of the first jack and the second metal dome of the second jack respectively. The optical coupler effectively and completely isolates the control module from the socket load, so that the safety of the socket is improved, the interference of the socket electric shock prevention circuit is reduced, and the circuit design is simplified.

For example, please refer to fig. 2, which specifically introduces a socket electric shock protection circuit, wherein the socket electric shock protection circuit includes an electric energy conversion circuit, a microcontroller U3, a first detection module, a first switch and a second switch, wherein an input end of the electric energy conversion circuit is connected to an input end of a live wire L and an input end of a neutral wire N of a socket respectively, and an output end of the electric energy conversion circuit is connected to the microcontroller U3, the first detection module, the first switch and the second switch respectively, for providing electric energy for the connection of the microcontroller U3, the first detection module, the first switch and the second switch. The electric energy conversion circuit comprises an isolation transformer, a rectifying module, a filter circuit consisting of capacitors C1-C4 and a voltage stabilizer HT7350, wherein the isolation transformer is an isolation transformer from 220V to 6V, the output end of the isolation transformer is sequentially connected with the rectifying circuit, the filter circuit consisting of capacitors C1-C4 and the voltage stabilizer HT7350, and the electric energy conversion circuit finally outputs 5V weak voltage. More specifically, the power conversion circuit is respectively connected with pin 2 of the microcontroller U3 and the negative electrodes of the switch K1 and the diode D1, and is used for supplying power to the microcontroller U3 and the detection switch circuit. The transformation circuit is integrated in the electric shock prevention circuit, so that the socket electric shock prevention circuit is more reliable. It should be noted that, in fig. 2, the capacities of the capacitors C1-C4 are exemplary labels, and capacitors with other capacities capable of completing filtering are also applicable to the present invention.

And the microcontroller U3 is of the model of STC8G1K 08. The microcontroller can realize the control of the first detection module, the first switch and the second switch, and the microcontroller is arranged in the electric shock prevention circuit of the socket, so that the intelligent control of the socket can be more effectively realized.

The first detection module comprises a double switch K1, a diode D1, a thyristor BG2 and a resistor R3, wherein one end of a line where the double switch K1 is located is connected with the resistor R1 and a U3 pin 7 of the microcontroller, and the other end of the line is connected with a first metal elastic sheet L1 of the first jack; one end of the other line where the double switch K1 is located is grounded, and the other end of the other line is connected with the first metal elastic sheet N1 of the second jack. Resistance R3's one end and the second metal shrapnel L2's of first jack are connected, and the other end is connected with the second metal shrapnel N2 of second jack to microcontroller U3 control two switches K1 are closed after, can realize having the inserted sheet to effectively insert and detect the socket. Further, double switch K1 one end is connected with the electric energy conversion circuit, the other end with thyristor BG 2's collecting electrode is connected, diode D1 is parallelly connected with double switch K1, thyristor BG 2's base with microcontroller U3's pin 8 is connected to microcontroller U3 can control double switch K1 and switch on and break off.

One end of the first switch S1 is connected with the live wire L access end of the socket, the other end of the first switch S1 is connected with the first metal elastic sheet L1 of the first jack, one end of the second switch S2 is connected with the zero wire N access end of the socket, and the other end of the second switch S2 is connected with the first metal elastic sheet N1 of the second jack. The microcontroller U3 is connected with the base of thyristor through pin 1, the collector of thyristor is connected with the positive pole of diode D3, first switch S1 and second switch S2 respectively, the negative pole of diode D3, first switch S1 and second switch S2 all still are connected with the electric energy converting circuit to can realize microcontroller U3 effectively to first switch S1 and second switch S2' S control, first switch S1 and second switch S2 can control first jack and second jack electrified or outage, have ensured the security of socket.

The socket electric shock protection circuit also comprises a second detection module, wherein the second detection module is respectively connected with the electric energy conversion circuit and the microcontroller U3, the second detection module comprises an optical coupler U1, a resistor R2, a diode D2 and a photosensitive diode LED1, wherein pin 4 of the optical coupler U1 is connected with the power conversion circuit, pin 3 of the optical coupler U1 is connected with pin 6 of the microcontroller U3, pin 1 of the optocoupler U1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the cathode of the diode D2, the anode of the diode D2 is connected to one end of the resistor R3 and the second metal dome L2 of the first jack, and a pin 2 of the optocoupler U1 is connected with the anode of the photosensitive diode LED1, and the cathode of the photosensitive diode LED1 is connected with the other end of the resistor R3 and the second metal elastic sheet N2 of the second jack respectively.

In this embodiment, the model of the optocoupler U1 may be, but is not limited to, PC 817. The double switch K1, the first switch S1 and the second switch S2 are all relays and are normally open relays. The two switches K1, the first switch S1 and the second switch S2 are all disconnected in the initial state when the socket is connected with the power supply.

In this embodiment, before the first switch, the second switch, and the dual switch are all turned off, the control module monitors whether a third feedback signal is present in the first detection module, and if the third feedback signal is present, the control module performs an alarm, and if the third feedback signal is not present, the control module controls the dual switch K1 to be turned on.

Referring to fig. 3, the working principle of the socket anti-electric shock circuit specifically includes the following steps:

firstly, after the socket is connected with a power supply, the microcontroller U3 detects whether the pin 6(IN2) receives a third feedback signal, wherein if the third feedback signal is received, because the double switch K1, the first switch S1 and the second switch S2 are not turned on at the moment, the socket is abnormal, the microcontroller U3 sends out a false alarm; if the third feedback signal is not received, the socket state is normal, and the microcontroller U3 controls the double switch K1 in the first detection module to be switched on;

then, the microcontroller U3 detects whether the pin 7(IN1) receives a signal, wherein if the signal is not received, it continues to determine whether the pin 7(IN1) receives the first feedback signal; if the first feedback signal is received, it is indicated that if the J1 plug-in sheet L and the J2 plug-in sheet N are inserted into the first jack and the second jack, and the time taken for the two plug-in sheets to be inserted into the corresponding jacks is within a first preset time, so that the microcontroller U3 controls the double switch K1 to be switched off, and after a certain delay, the microcontroller U3 controls the first switch S1 and the second switch S2 to be switched on;

finally, the second detection module starts to work, specifically, because a voltage of 220V is provided between the zero line and the live line, the photodiode LED1 is driven to emit light, so that the optocoupler U1 is turned on after being sensitized, and the microcontroller U3 can receive a second feedback signal, wherein the second feedback signal may be a current signal. If there is 220V between the neutral wire and the live wire, there will be no current signal in the circuit, and the microcontroller U3 can not receive the second feedback signal, and then the first switch S1 and the second switch S2 are controlled to be turned off. Therefore, the socket is monitored in the using process through the detection circuit, and the safety and the reliability of the socket are ensured.

IN this embodiment, the pin 7(IN1) and the pin 6(IN2) have AD (analog-to-digital) conversion functions, and can convert signals IN the first detection module and the second detection module, so that the socket can be controlled more accurately.

The embodiment of the utility model provides an in still introduce a socket, including the aforesaid socket protection against electric shock circuit.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (5)

1. A socket electric shock prevention circuit is characterized by comprising a control module, a first detection module, a first switch and a second switch, wherein,

the control module is respectively connected with the first detection module, the first switch and the second switch;

the first detection module is connected with the first jack and the second jack of the socket to form a detection circuit;

the first switch is connected between the live wire access end of the socket and the first metal elastic sheet of the first jack;

and the second switch is connected between the zero line access end of the socket and the first metal elastic sheet of the second jack.

2. The socket protection circuit of claim 1, wherein said first detection module comprises a dual switch and a first resistor, wherein,

the double switches are arranged on two lines, one ends of the two lines are respectively connected with a first signal receiving end and a grounding end of the control module, and the other ends of the two lines are respectively connected with a first metal elastic sheet of the first jack and a first metal elastic sheet of the second jack;

one end of the first resistor is connected with the second metal elastic sheet of the first jack, and the other end of the first resistor is connected with the second metal elastic sheet of the second jack.

3. The socket protection circuit of claim 2, further comprising a second detection module, wherein,

the first end of the second detection module is connected with the second metal elastic sheet of the first jack, the second end of the second detection module is connected with the second metal elastic sheet of the second jack, and the third end of the second detection module is connected with the second signal receiving end of the control module.

4. The socket protection circuit of claim 3, wherein the second detection module comprises an optocoupler, a photodiode, a second resistor, and a first diode, wherein,

a first end of the optocoupler is connected with one end of the second resistor, a second end of the optocoupler is connected with the anode of the photodiode, and a third end of the optocoupler is connected with a second signal receiving end of the control module;

the other end of the second resistor is connected with the cathode of the first diode;

the anode of the first diode is connected with one end of the first resistor;

and the cathode of the photodiode is connected with the other end of the first resistor.

5. A socket comprising the socket electric shock protection circuit according to any one of claims 1 to 4.

Images