CN2689597Y

CN2689597Y - Sanitary non-contact switch for power supply

Info

Publication number: CN2689597Y
Application number: CN 02232774
Authority: CN
Inventors: 陈有毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-22
Filing date: 2002-04-22
Publication date: 2005-03-30
Anticipated expiration: 2012-04-22

Abstract

The utility model provides a sanitary non-contact power supply switch for commercial power, utilizing the infrared emission and reflection to receive the sensing signal, and is used for the lighting power supply of the non-contact open and close commercial power. The utility model relates to to composed of an intermittent infrared emission circuit with modulation, an receiving circuit with frequency-select amplification, a modulating detection circuit, a bistable execution circuit, a power switch, and a power supply circuit of the self working power supply. The switch panel is arranged with a visible luminous indicating lamp displaying the self operating state and promoting the operation, and an explanation of the operation. The infrared emission is in a scanning mode which is helpful to reduce the static power consumption and the false action of the switch. The utility model relates to characterized in the two stable states sensing open and sensing close, belonging to the two-wire system switch connected in series with a load and non-connected with a zero-line. The significance of the utility model lies in that prevent the cross propagation of pathogenic organism initiated via the public lighting switch. When using, the user can open and close the lighting lamp or other household appliances by putting the hand in front of the switch with a distance about 5 centimeters for a while.

Description

Exempt to contact health mains supply switch

Technical field:

The utility model relates to electricity field, is that a kind of human body that is used for exempts to contact the switch that opens and closes the civil power mains lighting supply.

Background of invention:

As everyone knows, the infrared switch of prior art or other inductive switches all are not suitable for the common city's electrical light switches of replacement.General these switches do not adopt the form of contacting mutually with load, are three-way connections, and the inside that all is installed in some electric equipment products usually does automatic control switch, and the lighting switch that its design circuit all is not suitable for doing common wall embeded formula uses.Though some is that the two wires connects for the design of the lighting switch that existing wall embeded formula is installed, substantially all being that induction is automatic starts, the monostable switch of time delayed turn-off, and " bistable state " mains switch existence of closing is not opened/is controlled in control.Present city's electrical light switches all is the mechanical type mains switch of operating of contacts, do not see be useful on that the control that replaces this " bistable state " opens/control pass formula mechanical switch exempt to contact the automatic lighting switch of electronics, and to replace mechanical switch used in everyday fully, must there be a kind of brand-new control to open/control the electronic automatic switch of pass form.

We know in occasions such as hospital, hotel, station, public toilets, and the mains switch of illumination and other electrical equipment is that people inevitably need be with the device of the normal contact of hand channel.Mains switch not only has been sticky with a large amount of harmful bacterias because often touch and has played pathophorous effect, and because touched by hand repeatly, have many dirts that are difficult to wiping above, seem rather indecency, not only be repugnant to the eye, also make some people that like very much cleaning dare not or be reluctant to contact it, the result is frequent here light yellow altar lamp, has caused the waste of many energy in vain.

Summary of the invention:

In order to solve this ubiquitous problem, here we announce a new technical solution---exempt to contact health mains supply switch.Such circuit design does not have in Chinese patent in the past, does not more have actual product and comes out.

The utility model be utilize that the principle of infrared reflection makes exempt to contact automatic switch, in distance switch 3-6CM scope if shelter once, the on off state of power supply just overturns one time, if shelter is motionless, on off state does not just overturn.Like this as long as whenever wave an assistant before switch, switch is just opened by opening to become closure or become by closure, has avoided hand and the direct of switch to contact.

The beneficial effects of the utility model are switching mains lighting supplies of exempting to contact in some public places.Its meaning is to prevent to intersect bacterium that contact brought and the propagation of other pathogeny microbes, cuts off this communication channel.This is for the such place that might become propagating source of hospital particularly, public place, and the switch that is extensive use of this health has very large practical value.

The utility model is and the size of standard machinery formula body of wall mains switch and the very approximate mains supply switch of installation form, outward appearance is almost the same with the common power switch with structure and method of attachment, can replace the common power switch with it very easily, be installed in the mains switch groove.It is contacted with illuminating lamp mutually with the duplicate use two linear formulas of common power switch, just connects according to standard electrical equipment installation specification, and it also needs to connect a zero line in addition unlike other automatic control switch device and the form that becomes three-way connection.Need the mains switch of three-way connection to finish in construction, will be again under the situation of electrical equipment wiring moulding in wire casing the unusual difficulty of threading, and the mains switch of two wires form does not just have such troublesome problem, can be easy to replace as the common power switch.

Description of drawings:

Circuit theory diagrams of the present utility model are seen accompanying drawing 1.

Execution mode:

Solution of the present utility model is: switch panel has a pair of infrared/receiving tube and a visible light luminous indicating lamp.The emission of infraluminescence pipe is through the pulsed infrared light of ovennodulation, when in the certain distance object of stopping being arranged, be reflected, infrared receiving tube can receive the pulsed infrared light that reflects, become behind the transducing that signal pulse amplifies through frequency selective amplifier and subsequent conditioning circuit is handled, thereby make bistable circuit take place to overturn driving power switch opens or close.The utility model is a very thoughtful practical plan, and many careful considerations are arranged, and as it the operating state of light-emitting diode indicator cock is arranged simultaneously, and can indicate the switch position in the dark, is convenient to the user and seeks.On the panel of switch, directly mark the operation instruction of product, be convenient to not use the people of this product can grasp its using method rapidly, anyone can not produced misunderstandings to method of operation with literal.Internal circuit has also carried out special Design Treatment, after switch was finished switch state, infrared emission had " refractory period " TM, also was that its postpones emission and transducing signal, stay a time to allow operator's hand leave, in order to avoid beating of duplicating of switch.

Circuit shown in the accompanying drawing 1 is made up of following several sections: the infrared emission circuit of 1. intermittently being with modulation, 2. the receiving circuit that has frequency-selecting to amplify, 3. modulate detecting circuit and bistable executive circuit, 4. the power supply circuits of power switch and self working power are formed.

Operation principle of the present utility model is such:

Radiating circuit output infrared light intermittently, when meeting objects in front and stopping, infrared light can be received circuit by the light reflection and receive, and after amplifying through selective frequency amplifier circuit bistable circuit is overturn, and can allow power load open or close by executive circuit.

Infrared emission part is made up of IC1 (can with a NE556 or two NE555).IC1a produces the impulse wave control IC 1b that is interrupted, and IC1b is the multivibrator that produces modulating wave, and output current is given infrared transmitting tube.The hunting of frequency cycle that generally can set IC1a is 0.2-2 between second, and the frequency of oscillation of IC1b is between 100-100Kz.Infrared transmitting tube and common luminous tube polyphone, common luminous tube plays indicative function.Receiving circuit is made up of IC2, and IC2A, IC2B are two stage amplifers.The resonance amplifier of being made up of amplifier IC2A will amplify with signal frequently with infrared emission, form voltage comparator circuit through the back one-level by amplifier IC2B and export high level.The high level of amplifier IC2B output through D4 and C6 detection after the temporary transient IC1a that suppressed of feedback on the one hand, make the emission oscillating circuit suspend output, the bistable circuit of being made up of IC3 is overturn, allow the actuating of relay, can open and close the load light fixture.R9 and C6 have determined refractory period delay time TM.

Circuit after the bistable circuit of being made up of IC3 is an executive circuit, and it is relay drive circuit and relay power switch.

Self working power of this circuit is made up of the voltage stabilizing circuit of formations such as capacitance decompression (C8), voltage stabilizing didoe DW2 and controllable silicon SCR.When relay adhesive, loaded work piece, guarantee self not dead electricity by as shown in Figure 1 voltage stabilizing didoe/ghyristor circuit.As seen from Figure 1, relay not during adhesive a half-wave of alternating current provide power supply support through C8, D5, R12 to entire circuit, alternating current half-wave strides across C8, directly provides power supply support through D5, R12 to entire circuit during the relay adhesive.Voltage stabilizing didoe DW2 plays the pressure limiting effect, and when the alternating current of this half-wave was edged up conducting voltage above DW2 by zero phase voltage, the SCR conducting was so most of electric current is by this circuit institute bypass.The conduction value of DW2 is chosen as 12-16V, can provide enough operating voltages for this circuit.

Because radiating circuit is intermittently exported, so to be discovery the place ahead of scanning property have or not stops object for it.Sweep to and stop behind the object because the delay time TM of delay circuit decision is arranged, so it has a refractory period.By the time this refractory period TM just does rescan later again.

The utility model has following characteristics:

1, radiating circuit adopts two utmost point oscillating circuits, and the back level is controlled by prime, and infrared transmitting tube output infrared light intermittently is approximately per second 0.5-4 time, and the unobstructed object in scanning the place ahead is areflexia then.If obstacle exists, infrared light is reflected and causes that then receiving circuit produces output and executive circuit work.Receiving circuit has the output back directly to drive executive circuit work on the one hand, and the work of the inhibition radiating circuit of time-delay on the one hand makes the scanning emission that a refractory period TM be arranged.TM phase length is decided by R9, C6, can be selected between 1～5 second.Can clearly observe scan period and refractory period demonstration by the luminous indication that is arranged on the visible light luminous tube on the panel.The infrared emission intermittent scanning helps to reduce quiescent dissipation, has refractory period to help to reduce misoperation or switch beating repeatedly.

The emission oscillating circuit can be multivibrator, time-base circuit or other oscillator that multivibrator, common door circuit and the schmidt door circuit of discrete component composition formed.The resting period of scanning can be at 0.25-2 between second.

2, radiating circuit is subjected to the modulation of certain frequency, and receiving circuit has and launches with resonance amplifier circuit frequently, and it transmits and receives frequency can be between 100～100KHz.The phenomenon that this can effectively be avoided light to disturb makes its reliable operation.

3, the utility model and power load single line are connected in the civil power loop, when load switch is opened the load energising, controllable silicon voltage stabilizing circuit (compositions such as DW2, SCR, R14, R15, D5) is as shown in Figure 1 arranged, this is the circuit of a composite power supply, provides self working power by capacitor C 8 step-downs or resistance step-down (C8 can replace with a high-power resistance), polyphone zener diode DW1 voltage stabilizing circuit when power switch is in off-state; When being in on-state, power switch have the controllable silicon voltage stabilizing circuit (DW2, SCR, R14, R15, D5 etc.) at turn on delay angle that self working power is provided in addition.This circuit plays the turn on delay angle provides working power for this circuit self effect.The annexation of the self powered supply circuit of it and entire circuit: relay coil is connected to the positive terminal of DW2 and SCR by R12, D5.When relay contact closure, the decompression capacitor (dropping resistor of C8 or resistance drop volt circuit) of relay power switch contact short capacity voltage dropping circuit.

It can be to be exclusively used in the two-way trigger tube that controllable silicon triggers that constant voltage in the ghyristor circuit at this turn on delay angle triggers element, also can be common voltage stabilizing didoe.Its conducting voltage can be chosen between 12～36V.The circuit part of this composite power supply also can adopt a plurality of rectifier diodes or high-power voltage-stabiliser tube to replace controllable silicon voltage stabilizing circuit (DW2, SCR, R14, R15, D5 etc.) and be connected in series with and raise current potential in the loop, supplies self working power of circuit with this.It can replace the ghyristor circuit at this turn on delay angle.

The switch element of this circuit can be that bidirectional triode thyristor also can be a solid-state relay as shown in Figure 1.For providing the ghyristor circuit and the load switch at the turn on delay angle of working power, this circuit self is connected in series with in the loop.This ghyristor circuit both can use bidirectional triode thyristor, also can use one-way SCR.

4, the utility model is identical on physical dimension with the manual boat form toggle switch of common family expenses in structure in the middle of the practical application and outward appearance, can directly replace installation.It can easily be built in the mains switch groove of standard.It and regular tap are distinguished to some extent is manually not remove key and replace infraluminescence pipe and photoelectric receiving tube on its panel.The luminous tube that sends visible light can play the effect of operating state prompting.The prompting that it is done comprises: (1) scanning frequency and cycle; (2) refractory period TM.

Claims

1, a kind ofly exempts to contact health mains supply switch, be a kind of controlled opening of bistable state of utilizing infrared emission and reception technique and making/control close near switch, be used to the switching civil power mains lighting supply exempting to contact, be characterised in that its formation has with the lower part: the 1. infrared emission circuit that modulation is arranged of output intermittently; 2. the receiving circuit that has frequency-selecting to amplify; 3. modulate detecting circuit and bistable state executive circuit; 4. power termination switch and self working power power supply circuits.

2, switch as claimed in claim 1, it is characterized in that radiating circuit is the infrared emission circuit of intermittently exporting that modulation is arranged, two utmost point non-steady-state oscillation circuits before and after adopting, the back level is controlled by prime, decision scan period vibration period of the preceding utmost point, back utmost point vibration period decision modulating frequency, drive infrared transmitting tube output infrared light intermittently, two oscillating circuits of radiating circuit can be that time-base integrated circuit also can be the multivibrator that discrete component is formed, multivibrator or other multivibrators that common door circuit and schmidt door circuit are formed, the resting period of prime scanning can be at 0.25-2 between second, the level vibration is subjected to the pulse modulation of prime behind the radiating circuit, himself tranmitting frequency is between 100～100KHz, the intermittence of radiating circuit also is subjected to the FEEDBACK CONTROL of receiving circuit, the output of radiating circuit also drives a visible light luminous tube and infrared transmitting tube polyphone except that driving infrared transmitting tube, the cycle and the refractory period TM that can clearly be observed sweep hold-off by the luminous indication that is arranged on the visible light luminous tube on the switch panel show, the output of IC1A links to each other by D3 with the reset terminal of IC1B, the positive pole of D3 connects the output of IC1A, and the negative pole of D3 connects the reset terminal end of IC1B; The reset terminal of IC1A is connected by the negative pole of the D4 of D2 and infrared receiving unit, the positive pole of C6.The output of IC1B connects infrared transmitting tube L1 and visible light luminous tube L2. by a current-limiting resistance.

3, switch as claimed in claim 1 is characterized in that receiving circuit has and launch the resonance amplifier circuit of same frequency.The modulating frequency of its resonance amplifier circuit and radiating circuit is with frequently.It can be the amplifier resonance amplifier, also can be discrete component resonance amplifier and gate circuit resonance amplifier, and level has the detecting circuit output of can delaying time, output a period of time of the inhibition radiating circuit that can feed back behind the receiving circuit.Time-delay output time TM is between 1～5 second.The positive pole of D1 connects the output of IC2B, and the negative pole of D4 connects R9, C6, and links to each other with the input end of clock of IC3, and the positive level of D2 links to each other, and the negative level of D2 connects the reset terminal of IC1A and the anode of oscillating capacitance C1.

4, switch as claimed in claim 1, it is characterized in that executive circuit is made of a bistable circuit IC3, what this bistable circuit can be that common door circuit and schmidt door circuit form also can be the bistable circuit of time-base circuit or discrete component, the input end of clock of IC3 is connected with the negative terminal of D4, and the output of IC3 links to each other with the base stage that relay drives triode N1 by RH.

5, switch as claimed in claim 1, it is characterized in that power switch is a relay, self entire circuit and power termination polyphone, it adopts the circuit of composite power supply, provides self working power by capacitance decompression or resistance step-down, the zener diode voltage stabilizing circuit of contacting when power switch is in off-state; When being in on-state, power switch have the ghyristor circuit at individual turn on delay angle that self working power is provided in addition, the annexation of the self powered supply circuit of it and entire circuit is, relay coil passes through R12, D5 is connected to DW2, the positive terminal of SCR, when relay contact closure, the relay power switch contact short capacitor C 8 two ends-decompression capacitor of reduction voltage circuit or the resistance of resistance drop volt circuit-their connected mode is: the two ends of decompression capacitor C8 link to each other with normally opened contact with the moving contact of relay respectively, the end of C8 connects SCR, and pass through DW2, R14 is connected to the trigger electrode of controllable silicon SCR, the positive pole of D5 connects SCR, one of DW2 and relay contact, the negative pole of D5 is connected to the positive power source terminal of entire circuit by R12, and C8 also can be replaced by a high voltage bearing dropping resistor.

6, device as claimed in claim 1 is characterized in that switch has the luminous indication of visible light emitting diode (VLED).