CN214153268U - Electric shock prevention socket - Google Patents
Electric shock prevention socket Download PDFInfo
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- CN214153268U CN214153268U CN202120020906.5U CN202120020906U CN214153268U CN 214153268 U CN214153268 U CN 214153268U CN 202120020906 U CN202120020906 U CN 202120020906U CN 214153268 U CN214153268 U CN 214153268U
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Abstract
The utility model discloses a protection against electric shock socket, include: the phase line power supply control circuit comprises a first magnetic latching relay, wherein the first magnetic latching relay is used for controlling the connection or disconnection of a phase line of a power supply and a metal seat in a socket jack; the plug insertion detection circuit comprises a first switch, a second switch and a third switch, wherein the first switch is arranged on a panel of the socket, and the second switch and the third switch are arranged at the bottom of the socket; and the single chip microcomputer circuit comprises a single chip microcomputer, and the single chip microcomputer is respectively connected with the first switch, the second switch and the third switch and is used for controlling the working state of the first magnetic latching relay. The utility model discloses a set up three switch on the socket, the singlechip can effectively avoid metal object to insert the condition that the socket electrocuted according to the power supply of the closed condition control socket of three switch, greatly reduces the probability of electrocuteeing, but wide application in socket safety technical field.
Description
Technical Field
The utility model relates to a socket safety technical field especially relates to an electric shock prevention socket.
Background
In the use process of the socket, electric shock is sometimes caused by improper use. Such as by inadvertently touching the metal of the plug pins with fingers when inserting the plug connector into the receptacle, resulting in electrical shock. Or children can get an electric shock by holding conductive objects in curiosity and inserting the conductive objects into the socket holes or inserting fingers into the socket holes. At present, a plurality of sockets are additionally provided with a protective baffle in a jack to block exposed metal and reduce the electric shock probability, which is effective to the mistaken touch of children fingers, but the children still get electric shock if the children touch metal pins of a plug carelessly when the children take metal objects to insert or the plug is inserted into the socket.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the present invention provides an electric shock prevention socket.
The utility model adopts the technical proposal that:
an electric shock preventing socket comprising:
the phase line power supply control circuit comprises a first magnetic latching relay, wherein the first magnetic latching relay is used for controlling the connection or disconnection of a phase line of a power supply and a metal seat in a socket jack;
the plug insertion detection circuit comprises a first switch, a second switch and a third switch, wherein the first switch is arranged on a panel of the socket and is positioned between a live wire jack and a zero wire jack of the socket, the second switch and the third switch are arranged at the bottom of the socket, the position of the second switch corresponds to the position of the live wire jack, and the position of the third switch corresponds to the position of the zero wire jack;
and the single chip microcomputer circuit comprises a single chip microcomputer, and the single chip microcomputer is respectively connected with the first switch, the second switch and the third switch and is used for controlling the working state of the first magnetic latching relay.
Furthermore, the electric shock prevention socket also comprises a zero line power supply control circuit;
the zero line power supply control circuit comprises a second magnetic latching relay, and the second magnetic latching relay is used for controlling the connection or disconnection of the zero line of the power supply and a metal base in the socket jack.
Furthermore, the phase line power supply control circuit also comprises a first diode, a second diode, a first triode, a second triode, a first resistor and a second resistor;
the upper end pin of the S coil of the first magnetic latching relay is connected with a power supply, the lower end of the S coil is connected with the anode of the first diode, the negative electrode of the first diode is connected with a power supply, the positive electrode of the first diode is connected with the collector electrode of the second triode, the emitting electrode of the second triode is grounded, the base electrode of the second triode is connected with one end of the first resistor, the other end of the first resistor is connected with the first pin of the singlechip, the upper end pin of the R coil of the first magnetic latching relay is connected with a power supply, the lower end of the R coil is connected with the anode of the second diode, the cathode of the second diode is connected with a power supply, the anode of the second diode is connected with the collector of the first triode, the emitting electrode of the first triode is grounded, the base electrode of the first triode is connected with one end of the second resistor, and the other end of the second resistor is connected with the second pin of the single chip microcomputer.
Furthermore, the plug insertion detection circuit further comprises a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor;
one end of the first switch is grounded, the other end of the first switch is respectively connected with one end of the fifth resistor and the third pin of the single chip microcomputer, the other end of the fifth resistor is connected with the power supply, the third pin of the single chip microcomputer is connected with one end of the sixth capacitor, and the other end of the sixth capacitor is grounded;
one end of the second switch is grounded, the other end of the second switch is respectively connected with one end of the sixth resistor and a fourth pin of the single chip microcomputer, the other end of the sixth resistor is connected with a power supply, the fourth pin of the single chip microcomputer is connected with one end of the fifth capacitor, and the other end of the fifth capacitor is grounded;
one end of the third switch is grounded, the other end of the third switch is connected with one end of the seventh resistor and the fifth pin of the single chip microcomputer respectively, the other end of the seventh resistor is connected with the power supply, the fifth pin of the single chip microcomputer is connected with one end of the fourth capacitor, and the other end of the sixth capacitor is grounded.
Furthermore, the zero line power supply control circuit also comprises a third diode, a fourth diode, a third triode, a fourth triode, a third resistor and a fourth resistor;
the pin at the upper end of the S coil of the second magnetic latching relay is connected with a power supply, the lower end of the S coil is connected with the anode of a fourth diode, the negative electrode of the fourth diode is connected with a power supply, the positive electrode of the fourth diode is connected with the collector electrode of the fourth triode, the emitter of the fourth triode is grounded, the base of the fourth triode is connected with one end of the third resistor, the other end of the third resistor is connected with the sixth pin of the singlechip, the upper end pin of the R coil of the second magnetic latching relay is connected with a power supply, the lower end of the R coil is connected with the anode of the third diode, the negative electrode of the third diode is connected with a power supply, the positive electrode of the third diode is connected with the collector electrode of the third triode, and an emitting electrode of the third triode is grounded, a base electrode of the third triode is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with a seventh pin of the singlechip.
Further, the elastic member is used for clamping the pins of the plug to keep the positions of the pins unchanged.
The utility model has the advantages that: the utility model discloses a set up three switch on the socket, the singlechip can effectively avoid metal object to insert the condition that the socket electrocuted according to the power supply of the closed condition control socket of three switch, greatly reduces the probability of electrocuteeing.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an electric shock preventing socket according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a phase line power supply control circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a neutral line power supply control circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a plug insertion detection circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a single chip microcomputer circuit according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, the present embodiment provides an electric shock preventing socket, including:
the phase line power supply control circuit comprises a first magnetic latching relay RL1, wherein the first magnetic latching relay RL1 is used for controlling the connection or disconnection of a phase line of a power supply and a metal seat in a socket jack;
the plug insertion detection circuit comprises a first switch K1, a second switch K2 and a third switch K3, wherein the first switch K1 is arranged on a panel of the socket and is positioned between a live wire jack and a zero wire jack of the socket, the second switch K2 and the third switch K3 are arranged at the bottom of the socket, the position of the second switch K2 corresponds to the position of the live wire jack, and the position of the third switch K3 corresponds to the position of the zero wire jack;
the single chip microcomputer circuit comprises a single chip microcomputer, the single chip microcomputer is respectively connected with a first switch K1, a second switch K2 and a third switch K3, and the single chip microcomputer is used for controlling the working state of a first magnetic latching relay RL 1.
The electric shock preventing socket includes a two-hole socket, a three-hole socket, and other types of sockets, and the two-hole socket is shown in fig. 1, but other sockets are also applicable to the electric shock preventing socket of the present embodiment. Three switches are arranged on the electric shock prevention socket and can be realized by keys. The first switches are arranged on a panel of the socket, namely on the outer surface of a shell of the socket and between the live wire jack and the zero wire jack, and if a plurality of sockets are distributed on the shell, a plurality of first switches are arranged in a matched manner; for a two-jack socket, the first switch is disposed at the middle of the two jacks, and for a three-jack socket, the first switch is disposed at the center between the three jacks. The second switch and the third switch are arranged at the bottom of the socket in the shell, the positions of the second switch and the third switch correspond to the positions of the jacks, and when the plug is completely inserted into the socket, the two switches (namely the second switch and the third switch) at the bottom of the jacks are pressed by the plug pins to be closed together; it is noted that the number of switches may be increased appropriately for a triple-outlet or other type of outlet, for example a fourth switch may be provided for a triple-outlet.
The working principle of the electric shock prevention socket is as follows: when the plug is fully inserted into the socket, the two switches at the bottom of the jack are pressed by the plug pins to be closed together, and the switch (first switch) at the upper part of the socket is also pressed by the plug to be closed. The power supply of the socket is controlled by a singlechip and a relay. The three switches are closed at short intervals, almost simultaneously, during normal use of plug insertion. The singlechip constantly detects whether the three switches are closed, when any one of the three switches is detected to be closed, the time is delayed by a threshold time (such as 0.2 second), and then whether the other two switches are in a closed state together is judged, if so, the plug is inserted, and the power supply condition is met. If the other two switches are not closed within the threshold time, the false insertion is considered and the power supply condition is not satisfied. When the power supply condition is satisfied, the single chip microcomputer controls the relay to supply power to the zero line and the phase line of the socket. If and only if three switches are closed and must be closed simultaneously within a threshold time, power is supplied, and the probability of electric shock can be greatly reduced.
As a further optional implementation manner, the electric shock prevention socket further comprises a zero line power supply control circuit;
the zero line power supply control circuit comprises a second magnetic latching relay, and the second magnetic latching relay is used for controlling the connection or disconnection of the zero line of the power supply and a metal base in the socket jack.
The phase line power supply control circuit is used for controlling the conduction condition of a phase line (such as a live line), and when the live line is disconnected, the zero line is not electrified, so that the zero line can be set in a always-on state. However, in this embodiment, the connection and disconnection of the zero line is controlled by providing the zero line power supply control circuit, thereby realizing a double insurance.
The above circuits are described in detail below with reference to fig. 2-5.
As shown in fig. 2, the phase line power supply control circuit includes a first magnetic latching relay RL1, a first diode D1 and a second diode D2, a first transistor Q1 and a second transistor Q2, a first resistor R1 and a second resistor R2;
the upper end pin of the S coil of the first magnetic latching relay RL1 is connected with a power supply 12V, the lower end of the S coil is connected with the anode of a first diode D1, the cathode of the first diode D1 is connected with a 12V power supply, the anode of the first diode D1 is connected with the collector of a second triode Q2, the emitter of the second triode Q2 is grounded, the base of the second triode Q2 is connected with a first resistor R1, the other end of the first resistor is connected with a P1.0 pin of a single chip microcomputer, the upper end pin of the R coil of the first magnetic latching relay RL1 is connected with the power supply 12V, the lower end of the R coil is connected with the anode of a second diode D2, the cathode of a second diode D1 is connected with the 12V power supply, the anode of the second diode D2 is connected with the collector of the first triode Q1, the emitter of the first triode is grounded, the base of the first resistor R2, and the other end of the second resistor is connected with the P1.1 pin of the single chip microcomputer.
The L-1 end of a first magnetic latching relay RL1 of the phase line power supply control circuit is connected with the phase line of an external power supply, and the L-2 end is connected with a metal seat in a socket jack to supply power to the plug. The connection and disconnection of the L-1 and the L-2 are respectively controlled by the P1.0 and the P1.1 of the single chip microcomputer. For example, when three keys are detected to be closed within a threshold time and the power supply condition is met, P1.0 outputs a high-level pulse, at the moment, current flows into the base of a triode Q2 through a current-limiting resistor R1, Q2 is conducted, 12V power supply current flows into an S coil of RL1, and a relay triggers to enable L-1 and L-2 to be connected. After the P1.0 output pulse is over, L-1 and L-2 remain on. D1 plays the afterflow protection role and can protect the Q2 triode. When the power supply condition is not met, the single chip microcomputer P1.1 outputs a high-level pulse, at the moment, current flows into the base electrode of the triode Q1 through the current limiting resistor R2, the Q1 is conducted, and 12V current flows into the R coil of the RL1 magnetic latching relay, so that the L-1 and the L-2 are disconnected. The D2 diode plays a role in free-wheeling protection and can protect the transistor Q1. After P1.1 output pulse of the singlechip is finished, L-1 and L-2 of the RL1 relay keep off state. Only one pulse current is needed when the magnetic latching relay triggers, and the power consumption of the system during working can be reduced.
As shown in fig. 3, the zero line power supply control circuit comprises a second magnetic latching relay RL2, a third diode D3, a fourth diode D4, a third triode Q3, a fourth triode Q4, a third resistor R3 and a fourth resistor R4;
the upper end pin of the S coil of the second magnetic latching relay RL2 is connected with a power supply 12V, the lower end of the S coil is connected with the anode of a fourth diode D4, the cathode of the fourth diode D4 is connected with a 12V power supply, the anode of the fourth diode D4 is connected with the collector of a fourth triode Q4, the emitter of the fourth triode Q4 is grounded, the base of the fourth triode Q4 is connected with a third resistor R3, the other end of the third resistor is connected with a P1.2 pin of a single chip microcomputer, the upper end pin of the R coil of the second magnetic latching relay RL2 is connected with the power supply 12V, the lower end of the R coil is connected with the anode of the third diode D3, the cathode of the third diode D3 is connected with the 12V power supply, the anode of the third diode D3 is connected with the collector of the third triode Q3, the emitter of the third triode is grounded, the base of the fourth resistor R4, and the other end of the fourth resistor is connected with the P1.3 pin of the single chip microcomputer.
The principle of the zero line power supply control circuit is similar to that of the phase line power supply control circuit, and the description is omitted here.
As shown in fig. 4, the plug insertion detection circuit includes a first key K1 (i.e., a first switch), a second key K2 (i.e., a second switch), a third key K3 (i.e., a third switch), a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6;
the pin of one end of the first key K1 is grounded, the other end of the first key is connected with a fifth resistor R5 and a single chip microcomputer pin P0.0, the other end of the fifth resistor R5 is connected with a power supply 5V, the single chip microcomputer pin P0.0 is connected with one end pin of a sixth capacitor C6, the other end of the C6 is grounded, the pin of one end of the second key K2 is grounded, the other end of the second key is connected with a sixth resistor R6 and a single chip microcomputer pin P0.1, the other end of the sixth resistor R6 is connected with the power supply 5V, the single chip microcomputer pin P0.1 is connected with one end pin of the fifth capacitor C5, the other end pin of the C5 is grounded, the pin of one end of the third key K3 is grounded, the other end of the third key K7 is connected with a seventh resistor R7 and a single chip microcomputer pin P0.2, the other end pin of the seventh resistor R7 is connected with the power supply 5V, the single chip microcomputer pin P0.2 is connected with one end pin of the fourth capacitor C4, and the other end pin of the single chip microcomputer pin of the C4 is grounded.
The plug-in detection circuit uses three keys for detection. The key K1 (i.e., the first switch) is disposed on the panel intermediate the two receptacles of the receptacle, and the keys K2 (i.e., the second switch) and K3 (i.e., the third switch) are disposed on the bottom of the receptacle, as shown in fig. 1. When the plug is completely inserted into the socket, the plug pins press K2 and K3 tightly, and simultaneously the plug also presses a key K1 on the panel tightly, at the moment, the P0.0 pin connected with the singlechip and K1, the P0.1 pin connected with the K2 and the P0.2 pin connected with the K3 all detect low level, and the plug is completely inserted. Meanwhile, the singlechip program can judge whether the three switch closing signals are finished within a threshold time, and if so, the power supply condition is met. The metal seat in the jack has certain elasticity, and clamps the plug pins to keep the plug position unchanged. The capacitors C4, C5 and C6 play a role in filtering and removing interference.
As shown in fig. 5, fig. 5 is an electronic circuit diagram of a single chip circuit, which includes a chip U1 and other peripheral circuits, and in this embodiment, the chip U1 may be implemented by a chip with model number STC89C52 RC.
In conclusion, the electric shock preventing socket of the embodiment can not get an electric shock when being singly inserted into one jack, and can not get an electric shock when the plug is not completely inserted into two jacks. And if and only when the plug is completely inserted into the socket, the plug pins press and close the two switches at the bottom of the jack together, meanwhile, the plug presses and closes the switch on the upper end face of the socket, and the sequential closing time of the three switches is within the threshold time, the socket can supply power to the plug. The power supply of the socket is controlled by adopting a single chip microcomputer and a relay, and when the single chip microcomputer detects that the power supply condition is established, the relay is controlled to respectively supply power to the zero line and the phase line of the socket. Three switches are required to be closed within a threshold time to supply power, so that the electric shock probability can be greatly reduced.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (6)
1. An electric shock preventing socket, comprising:
the phase line power supply control circuit comprises a first magnetic latching relay, wherein the first magnetic latching relay is used for controlling the connection or disconnection of a phase line of a power supply and a metal seat in a socket jack;
the plug insertion detection circuit comprises a first switch, a second switch and a third switch, wherein the first switch is arranged on a panel of the socket and is positioned between a live wire jack and a zero wire jack of the socket, the second switch and the third switch are arranged at the bottom of the socket, the position of the second switch corresponds to the position of the live wire jack, and the position of the third switch corresponds to the position of the zero wire jack;
and the single chip microcomputer circuit comprises a single chip microcomputer, and the single chip microcomputer is respectively connected with the first switch, the second switch and the third switch and is used for controlling the working state of the first magnetic latching relay.
2. The anti-shock socket of claim 1, further comprising a neutral supply control circuit;
the zero line power supply control circuit comprises a second magnetic latching relay, and the second magnetic latching relay is used for controlling the connection or disconnection of the zero line of the power supply and a metal base in the socket jack.
3. The anti-shock socket as claimed in claim 1, wherein the phase line power supply control circuit further comprises a first diode, a second diode, a first transistor, a second transistor, a first resistor and a second resistor;
the upper end pin of the S coil of the first magnetic latching relay is connected with a power supply, the lower end of the S coil is connected with the anode of the first diode, the negative electrode of the first diode is connected with a power supply, the positive electrode of the first diode is connected with the collector electrode of the second triode, the emitting electrode of the second triode is grounded, the base electrode of the second triode is connected with one end of the first resistor, the other end of the first resistor is connected with the first pin of the singlechip, the upper end pin of the R coil of the first magnetic latching relay is connected with a power supply, the lower end of the R coil is connected with the anode of the second diode, the cathode of the second diode is connected with a power supply, the anode of the second diode is connected with the collector of the first triode, the emitting electrode of the first triode is grounded, the base electrode of the first triode is connected with one end of the second resistor, and the other end of the second resistor is connected with the second pin of the single chip microcomputer.
4. The anti-shock socket as claimed in claim 1, wherein the plug insertion detection circuit further comprises a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor;
one end of the first switch is grounded, the other end of the first switch is respectively connected with one end of the fifth resistor and the third pin of the single chip microcomputer, the other end of the fifth resistor is connected with the power supply, the third pin of the single chip microcomputer is connected with one end of the sixth capacitor, and the other end of the sixth capacitor is grounded;
one end of the second switch is grounded, the other end of the second switch is respectively connected with one end of the sixth resistor and a fourth pin of the single chip microcomputer, the other end of the sixth resistor is connected with a power supply, the fourth pin of the single chip microcomputer is connected with one end of the fifth capacitor, and the other end of the fifth capacitor is grounded;
one end of the third switch is grounded, the other end of the third switch is connected with one end of the seventh resistor and the fifth pin of the single chip microcomputer respectively, the other end of the seventh resistor is connected with the power supply, the fifth pin of the single chip microcomputer is connected with one end of the fourth capacitor, and the other end of the sixth capacitor is grounded.
5. The anti-shock socket as claimed in claim 2, wherein the neutral supply control circuit further comprises a third diode, a fourth diode, a third transistor, a fourth transistor, a third resistor, and a fourth resistor;
the pin at the upper end of the S coil of the second magnetic latching relay is connected with a power supply, the lower end of the S coil is connected with the anode of a fourth diode, the negative electrode of the fourth diode is connected with a power supply, the positive electrode of the fourth diode is connected with the collector electrode of the fourth triode, the emitter of the fourth triode is grounded, the base of the fourth triode is connected with one end of the third resistor, the other end of the third resistor is connected with the sixth pin of the singlechip, the upper end pin of the R coil of the second magnetic latching relay is connected with a power supply, the lower end of the R coil is connected with the anode of the third diode, the negative electrode of the third diode is connected with a power supply, the positive electrode of the third diode is connected with the collector electrode of the third triode, and an emitting electrode of the third triode is grounded, a base electrode of the third triode is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with a seventh pin of the singlechip.
6. The socket as claimed in claim 1, wherein the metal holder is provided with an elastic member for clamping the pins of the plug to maintain the positions of the pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120020906.5U CN214153268U (en) | 2021-01-04 | 2021-01-04 | Electric shock prevention socket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120020906.5U CN214153268U (en) | 2021-01-04 | 2021-01-04 | Electric shock prevention socket |
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| CN214153268U true CN214153268U (en) | 2021-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787144A (en) * | 2021-01-04 | 2021-05-11 | 广东交通职业技术学院 | Anti-electric-shock socket and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787144A (en) * | 2021-01-04 | 2021-05-11 | 广东交通职业技术学院 | Anti-electric-shock socket and control method |
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