CN200966042Y - Two-wire touch type electronic switch - Google Patents
Two-wire touch type electronic switch Download PDFInfo
- Publication number
- CN200966042Y CN200966042Y CN 200620118430 CN200620118430U CN200966042Y CN 200966042 Y CN200966042 Y CN 200966042Y CN 200620118430 CN200620118430 CN 200620118430 CN 200620118430 U CN200620118430 U CN 200620118430U CN 200966042 Y CN200966042 Y CN 200966042Y
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- power supply
- switch
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- state power
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Abstract
The utility model relates to a two-wire system touching-type electronic switch. A circuit board component comprises an AC-DC transform circuit, a transient current control circuit, a voltage-stabilizing and waver-filtering unit, a control unit, a drive element and an on-state power supply unit; wherein, an off-state power supply unit consists of the AC-DC transform circuit and the transient current control circuit; the off-state power supply unit and the voltage-stabilizing and waver-filtering unit assure the effective power supply under a standby status of the system and can supply sufficient working current to the control unit and the driven element in a moment when the switch is turned on and off; the on-state power supply unit and the voltage-stabilizing and waver-filtering unit provide the electrical energy for the system after the switch is turned on; the maximum value of the conduction voltage drop of the switch is smaller than or equal to 2V. The micro-power consumption of the electronic switch can be realized. The phenomenon of twinkling can not happen to the loaded luminaires and the utility model can be provided with various loads of the fluorescent lamps, the energy-saving lamps, the incandescent lamps and the ventilators, etc.
Description
Technical field
The utility model relates to a kind of touching electronic switch, and particularly a kind of two-wire system touching electronic switch is used for the switch control of the light fixture or the electrical equipment of family and public place.
Background technology
In the prior art, two-wire system (no zero line input) electronic switch other circuit except that power supply circuits are (as control circuit, driving element etc.) mostly power supply is employing method of supplying power to (OFF state method of supplying power to by the power taking in the voltage circuit of power circuit of OFF state power supply circuits when switch cuts out, its circuit is called the OFF state power supply circuits), the OFF state method of supplying power to generally adopts resistance-capacitance depressurization rectifying and wave-filtering or the filtering of transformer step-down rectifier, when switch cuts out, need keep normal stand-by operation and consume less power owing to the control circuit of switch, and at the bigger power of the instant shut-in consumption of switch open, all the more so as the driving element of switch for relay.Even control circuit and microcontroller stand-by power consumption when switch cuts out is very low, for the normal unlatching that guarantees switch needs bigger with the design of OFF state supply current, more than or equal to the maximum operating currenbt of switch, otherwise rapid decline of the instantaneous voltage of switch open makes control circuit can not continue operate as normal.Therefore, still have bigger standby current to flow through switch when switch cuts out, scintillation can take place in light fixture when load is electricity-saving lamp and fluorescent lamp.In order not make the light fixture flicker, Resistor-Capacitor Unit in parallel is as the method for coad connector at the load two ends in the employing that has, and this has just increased installation difficulty, makes electronic switch be difficult to promote.
Summary of the invention
The purpose of this utility model is to provide a kind of electronic switch of low speed paper tape reader static power disspation, when cutting out, switch have only faint electric current to flow through load, when the instantaneous elder generation of switch open provides bigger operating current to make switch open to control unit and driving element by control unit control OFF state power supply unit, change the ON state power supply state afterwards over to; Control unit controls OFF state power supply unit enters big current work state in advance when switch cuts out, replenish switch rapidly and close the power of Instantaneous Control unit and driving element consumption, make the voltage at power filtering capacitor two ends maintain rated value, solved the problem of load light fixture flicker effectively, workload-adaptability is strong, can be with fluorescent lamp, electricity-saving lamp, incandescent lamp, and various loads such as ventilating fan.
The technical solution of the utility model is: a kind of two-wire system touching electronic switch is characterized in that: the circuit board assemblies of installing in switch case comprises AC-DC translation circuit, transient current control circuit, voltage stabilizing and filter unit, control unit, driving element and ON state power supply unit.Wherein AC-DC translation circuit, transient current control circuit are formed the OFF state power supply unit.AC-DC translation circuit output links to each other with driving element with the transient current control circuit; The output OUT2 of ON state power supply unit links to each other with transient current control circuit, voltage stabilizing and filter unit, and provides electric energy for system stability work jointly; The input IN1 of ON state power supply unit and linking to each other of each unit, output OUT1 links to each other with the AC-DC translation circuit publicly.
The utility model compared with prior art has the following advantages:
As long as control unit guarantees to have enough low quiescent dissipation, just can make the quiescent current control of switch enter the dormancy standby to keep switching system by the transient current control circuit to bottom line, again can be at the instantaneous operating current of abundance that provides of switch open to control unit and driving element, switch is accurately opened, solved the problem of load light fixture flicker, and without the installation load Resistor-Capacitor Unit, can make things convenient for and directly replace regular tap, be fit to various light fixtures and use, make applying of two lines system electronic switch become possibility.
Description of drawings
Accompanying drawing is a circuit theory schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to accompanying drawing, switching circuit comprises AC-DC translation circuit, transient current control circuit, voltage stabilizing and filter unit, control unit, driving element and overload protecting circuit, ON state power supply unit.Wherein AC-DC translation circuit, transient current control circuit are formed the OFF state power supply unit.The AC-DC translation circuit adopts full bridge rectifier, driving element adopts field effect transistor, comprise a d type flip flop chip and a touch key-press in the control unit, one end of touch key-press with link to each other publicly, the other end links to each other as the triggering signal input pin of the control port of control unit and d type flip flop chip and the Current Control input port Ctrl of transient current control circuit, touch low level signal and deliver to the transient current control circuit, control it and produce big operating current and be control unit and driving element power supply by the voltage regulation filtering unit by the Ctrl end.The transient current control circuit loses voltage and quits work behind the switch open, and be system's power supply by the ON state power supply unit by the voltage regulation filtering unit this moment.
The transient current control circuit comprises R1～R4, field effect transistor Q1 and Q2, capacitor C 1, diode D1; The positive pole of diode D1 is as the input IN of transient current control circuit, and negative pole is connected with the drain electrode of field effect transistor Q1 and the end of R1; The source electrode of field effect transistor Q1 is connected with the end of R3, and the end of the other end of R3 and R4 is connected to form the output OUT of transient current control circuit.The grid of field effect transistor Q1 is connected with R2, and the other end of R2 is connected with the drain electrode of the other end of R1 and field effect transistor Q2; The grid of field effect transistor Q2 is connected with the end of the other end of R4 and C1, and as the Current Control input port Ctrl of transient current control circuit; The source electrode of field effect transistor Q2 is connected to form public ground with the other end of C1 and is connected with the direct current of each unit of switch publicly.
When switch is in closed condition, L, the N two ends add the moment of 220V alternating voltage, Q2 ends, Q1 is by resistance R 1, R2 obtains higher grid voltage and is in abundant conducting state, there is big electric current to flow through the source electrode of Q1, deliver to the voltage regulation filtering unit through current-limiting resistor voltage divider R3, electric capacity in the voltage regulation filtering unit has played the effect of store electrical energy simultaneously, make system obtain operating voltage VCC through voltage regulation filtering, the grid of Q2 obtains voltage and conducting through R4 when the OUT of transient current control circuit port voltage raises, the grid voltage of Q1 decreases and is in low conducting state, the ON state power supply unit obtains operating current and a part is wherein fed back to the voltage regulation filtering unit, because the quiescent dissipation of control unit is extremely low, Q1 is in that system enough keeps operating voltage at rated value under the low conducting state, at this moment, the current input terminal mouth of the triggering signal input pin of d type flip flop chip and transient current control circuit is a high level.
Deliver to the current input terminal mouth Ctrl of transient current control circuit when touching low level signal, be input to the grid of Q2, Q2 ends, Q1 obtains higher grid voltage and fully conducting by R1, R2, the transient current control circuit provides bigger operating current to control unit and driving element instantaneous through the voltage regulation filtering unit, trigger control driving component by control unit makes switch open again, changes the ON state power supply state over to.OFF state power supply circuits lost voltage and quit work this moment, and the triggering signal input pin of d type flip flop chip and the current input terminal mouth Ctrl of transient current control circuit obtain high level through pull-up resistor R4.
Switch is under opening, deliver to the current input terminal mouth Ctrl of transient current control circuit when touching low level signal, d type flip flop upset control driving component off switch, the course of work of transient current is instantaneous identical with the unlatching switch, the big electric current that produces is used for replenishing switch and closes the power and the switch of Instantaneous Control unit and driving element consumption and close the instantaneous stored electric energy of voltage regulation filtering unit capacitor that consumes by being opened to, make the voltage at two ends, voltage regulation filtering unit maintain rated value, guaranteed that control unit enters the dormancy holding state.
ON state power supply unit circuit comprises that R5, R6, field effect transistor Q3, diode D2, diode D3, transient voltage suppress diode D4, capacitor C 2, voltage checking chip U1.The negative pole of the positive pole of D2, the drain electrode of Q3, D4 and the direct current of each unit of switch are connected the input port IN1 as the ON state power supply unit publicly; The end of the negative pole of D2, the positive pole of D3, R5 and R6, the positive pole of C2 link to each other with 1 pin of voltage checking chip U1 and form common port Vin; The other end of R5, the grid of Q3 link to each other with 2 pin of U1; The negative pole of 3 pin of the source electrode of Q3, the positive pole of D4, U1, the other end of R6, C2 links to each other as an output OUT1 of ON state power supply unit; The negative pole of D3 is as another output OUT2 of ON state power supply unit.
The OFF state power supply circuits lose voltage and quit work behind the switch open, this moment, the ON state power supply unit was system's power supply by the voltage regulation filtering unit, load current enters the ON state power supply unit by AC-DC converter unit and driving element through input port IN1, this moment, Q3 ended, C2 charges rapidly, the ON state power supply unit has electric current to flow into the power that the voltage regulation filtering unit has replenished control unit and driving element consumption after the Vin terminal voltage makes the D3 conducting, makes system voltage maintain rated value.The Vin terminal voltage continues to raise when reaching the input threshold values of voltage checking chip, and the output of U1 obtains high level by R5, and the grid of Q3 links to each other with the output of U1, and the grid of Q3 obtains high level and makes D, the conducting of the S utmost point, and load current flows through Q3, and D2 ends.The Vin terminal voltage begins to descend, and C2 is in discharge condition, and ON state power supply unit electric current flows into the voltage regulation filtering unit through D3, and system voltage maintains rated value.The Vin terminal voltage continues to reduce, and when voltage was lower than the input threshold values of U1, the U1 output low level was ended Q3, and C2 restarts charging.So the switch system voltage under opening that makes repeatedly that does not stop maintains rated value.The ON state power supply unit is identical in switch open its operation principle when closing, and just flows through the size of current difference of this unit.
Claims (3)
1, a kind of two-wire system touching electronic switch comprises ON state power supply unit, OFF state power supply unit and voltage regulation filtering unit, and control unit is characterized in that: the OFF state power supply unit also comprises the transient current control circuit.
2, switch according to claim 1 is characterized in that: the transient current control circuit comprises R1～R4, field effect transistor Q1 and Q2, capacitor C 1, diode D1;
The positive pole of diode D1 is as the input IN of transient current control circuit, and negative pole is connected with the drain electrode of field effect transistor Q1 and the end of R1;
The source electrode of field effect transistor Q1 is connected with the end of R3, and the end of the other end of R3 and R4 is connected to form the output OUT of transient current control circuit;
The grid of field effect transistor Q1 is connected with R2, and the other end of R2 is connected with the drain electrode of the other end of R1 and field effect transistor Q2;
The grid of field effect transistor Q2 is connected with the end of the other end of R4 and C1, and as the Current Control input port Ctrl of transient current control circuit;
The source electrode of field effect transistor Q2 is connected to form public ground with the other end of C1 and is connected with the direct current of each unit of switch publicly.
3, switch according to claim 1 is characterized in that: ON state power supply unit input port IN1 with link to each other publicly, output port OUT1 links to each other with the AC-DC translation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620118430 CN200966042Y (en) | 2006-06-08 | 2006-06-08 | Two-wire touch type electronic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620118430 CN200966042Y (en) | 2006-06-08 | 2006-06-08 | Two-wire touch type electronic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200966042Y true CN200966042Y (en) | 2007-10-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620118430 Expired - Fee Related CN200966042Y (en) | 2006-06-08 | 2006-06-08 | Two-wire touch type electronic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200966042Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951248A (en) * | 2009-10-27 | 2011-01-19 | 陈涛 | Electronic switch |
| CN104767511A (en) * | 2015-05-04 | 2015-07-08 | 宁波永贵佳明测控技术有限公司 | Two-wire system magnetic switch circuit |
| CN107658646A (en) * | 2016-07-24 | 2018-02-02 | 郭振华 | A kind of multifunctional safe intelligent switch socket |
| CN107844078A (en) * | 2017-11-02 | 2018-03-27 | 北京众清科技有限公司 | Single live wire power getting circuit and electricity-fetching method |
| CN113067570A (en) * | 2021-03-31 | 2021-07-02 | 樊娜 | Electronic wall switch applied to alternating current power supply system |
-
2006
- 2006-06-08 CN CN 200620118430 patent/CN200966042Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951248A (en) * | 2009-10-27 | 2011-01-19 | 陈涛 | Electronic switch |
| CN104767511A (en) * | 2015-05-04 | 2015-07-08 | 宁波永贵佳明测控技术有限公司 | Two-wire system magnetic switch circuit |
| CN104767511B (en) * | 2015-05-04 | 2018-01-02 | 宁波佳明测控技术有限公司 | A kind of two-wire system magnetic switch circuit |
| CN107658646A (en) * | 2016-07-24 | 2018-02-02 | 郭振华 | A kind of multifunctional safe intelligent switch socket |
| CN107844078A (en) * | 2017-11-02 | 2018-03-27 | 北京众清科技有限公司 | Single live wire power getting circuit and electricity-fetching method |
| CN113067570A (en) * | 2021-03-31 | 2021-07-02 | 樊娜 | Electronic wall switch applied to alternating current power supply system |
| CN113067570B (en) * | 2021-03-31 | 2023-07-07 | 樊娜 | Electronic wall switch applied to alternating current power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |