CN103729979A - Switch warning indicator - Google Patents
Switch warning indicator Download PDFInfo
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- CN103729979A CN103729979A CN201210392302.9A CN201210392302A CN103729979A CN 103729979 A CN103729979 A CN 103729979A CN 201210392302 A CN201210392302 A CN 201210392302A CN 103729979 A CN103729979 A CN 103729979A
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- switch
- light emitting
- emitting diode
- open
- warning device
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Abstract
The invention discloses a switch warning indicator which comprises a power source, a switch, a resistance transducer, a signal amplifier, a loudspeaker and a light emitting diode. The switch warning indicator is characterized in that the switch is connected with the power source through a resistor, the two ends of the switch are connected with the resistance transducer in parallel, and the resistance transducer is connected with the light emitting diode and the loudspeaker in parallel through the signal amplifier. The switch warning indicator achieves the function of reminding a user to turn off a device, and accidents caused by negligence of people, for example, the user forgets to turn off the device and mistakenly turns on the device can be effectively reduced. The switch warning indicator has the advantages of being simple in structure, low in cost and convenient to use.
Description
Technical field
The present invention relates to a kind of open-close warning device, particularly one and make alarming device sounding or light signal, remind user's open-close warning device.
Background technology
Its certain duty of much industry or commercial device, (as: open by mistake, close by mistake or forget to hold, forget and close) all can make troubles and worry to user, even causes the generation of mishap.As: forgetting turns off the tap causes waste water resource, forgets that the power supply that closes electrical appliance causes wasting electric weight, or even causes the serious consequence that burns out electrical appliance.Often, because of user's inadvertent, breed big mistakes.Therefore need a kind of open-close warning device, be used for reminding user to turn off device, find in time error, take precautions against in possible trouble.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of open-close warning device that can remind user to turn off device.
For achieving the above object, the present invention is achieved through the following technical solutions:
Open-close warning device, comprises power supply, switch, electric resistance sensor, signal amplifier, loudspeaker and light emitting diode, and switch is connected with power supply after resistance, a two ends electric resistance sensor in parallel of switch; Described electric resistance sensor is in parallel with light emitting diode, loudspeaker after signal amplifier.
In such scheme, described signal amplifier is comprised of two NPN type triodes, wherein the base stage of first triode and one end of electric resistance sensor are connected, its collector is connected with positive source, its emitter is divided into two branch roads after connecting: wherein a branch road is got back to power cathode after resistance, and another branch road is connected with the base stage of second triode; The collector of second triode is connected with the negative pole of light emitting diode, ground connection after its emitter is connected with power cathode.This signal amplifier structure is simple, stable performance, enlargement factor are good, has met the required function of this scheme, and simple, save element.
In such scheme, in order to prevent that light emitting diode from being punctured by electric current, ensure that circuit is safer, stable, the positive terminal of described light emitting diode is also connected with a protective resistance.
In such scheme, for reducing costs, realize its switching function, described switch is preferably mechanical switch simultaneously.
The invention has the beneficial effects as follows:
Open-close warning device of the present invention utilizes switch and electric resistance sensor to gather alarm signal, then by signal amplifier, signal is delivered to direct current loudspeaker and light emitting diode, thereby realizes warning.Can remind user to turn off device, effectively reduce the accident causing because the artificial carelessness such as forgetting to close, open by mistake.Have simple in structure, cost is low.This device can be contained on relevant device, power autonomous, has that volume is little, a power saving, remarkable advantage easy to maintenance.Its application is both convenient produces, lives, and the security that has been significantly increased, has promotional value.
Accompanying drawing explanation
Fig. 1 is open-close warning device circuit theory diagrams of the present invention.
Fig. 2 is open-close warning device principle of work block scheme of the present invention.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, illustrated embodiment is only for explaining the present invention, the scope being not intended to limit the present invention.
As shown in Figure 1, open-close warning device, comprises power supply E, K switch, electric resistance sensor Rp, signal amplifier, loudspeaker L and light emitting diode VD, and K switch is connected with power supply E after resistance R 1, a two ends electric resistance sensor Rp in parallel of K switch; Described electric resistance sensor Rp is in parallel with light emitting diode VD, loudspeaker L after signal amplifier.In the present embodiment, described signal amplifier is comprised of two NPN type triodes.Wherein the base stage of first triode Q1 and one end of electric resistance sensor Rp are connected, its collector is connected with positive source, its emitter is divided into two branch roads after connecting: wherein a branch road is got back to power cathode after resistance R 2, and another branch road is connected with the base stage of second triode Q2; The collector of second triode Q2 is connected with the negative pole of light emitting diode VD, ground connection after its emitter is connected with power supply E negative pole.The positive terminal of described light emitting diode VD is also connected with a protective resistance R4.Described K switch is mechanical switch.
The principle of work of open-close warning device: it is warning circuit that this device utilizes switch and electric resistance sensor (Rp), switch and transducing signal are provided, by warning circuit, be the alarm signal that alarming device (signal amplifier, loudspeaker, pilot lamp) provides relatively high power again, make alarming device sounding or light signal, remind user to note.
This device can be widely used on the control device of various industry and civilian installation.Now as an example of civil running water tap example, further introduce its application: this device volume is little, can directly be loaded in water tap body.Open-close warning device is when working with water swivel, and trigger switch can be realized water swivel start or stop sensing.Resistance sensor can be realized water swivel fault (as leaking) sensing.
Claims (4)
1. open-close warning device, comprise power supply (E), switch (K), electric resistance sensor (Rp), signal amplifier, loudspeaker (L) and light emitting diode (VD), it is characterized in that: switch (K) is connected with power supply (E) after resistance (R1) two ends electric resistance sensors in parallel (Rp) of switch (K); (L) is in parallel with light emitting diode (VD), loudspeaker after signal amplifier for described electric resistance sensor (Rp).
2. open-close warning device according to claim 1, it is characterized in that: described signal amplifier is comprised of two NPN type triodes, wherein the base stage of first triode (Q1) is connected with one end of electric resistance sensor (Rp), its collector is connected with positive source, its emitter is divided into two branch roads after connecting: wherein a branch road is got back to power cathode after resistance (R2), and another branch road is connected with the base stage of second triode (Q2); The collector of second triode (Q2) is connected with the negative pole of light emitting diode (VD), ground connection after its emitter is connected with power supply (E) negative pole.
3. open-close warning device according to claim 1, is characterized in that: the positive terminal of described light emitting diode (VD) is also connected with a protective resistance (R4).
4. open-close warning device according to claim 1, is characterized in that: described switch (K) is mechanical switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210392302.9A CN103729979A (en) | 2012-10-16 | 2012-10-16 | Switch warning indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210392302.9A CN103729979A (en) | 2012-10-16 | 2012-10-16 | Switch warning indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103729979A true CN103729979A (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210392302.9A Pending CN103729979A (en) | 2012-10-16 | 2012-10-16 | Switch warning indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103729979A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0249321A (en) * | 1988-08-10 | 1990-02-19 | Mitsubishi Electric Corp | Switch device |
| CN2108969U (en) * | 1991-12-18 | 1992-07-01 | 魏红斌 | Multifunctional alarm |
| CN101041332A (en) * | 2006-03-21 | 2007-09-26 | 林学春 | Method and device for detecting and alarming of noxious gas inside automobile |
| CN201838149U (en) * | 2010-11-18 | 2011-05-18 | 夏庆国 | Quilt kicking and bed wetting alarm device for infant |
| CN102269041A (en) * | 2011-08-26 | 2011-12-07 | 龚文资 | Alarm circuit for poor heat radiation of automobile engine water tank |
| CN102523671A (en) * | 2011-12-28 | 2012-06-27 | 苏州天华超净科技股份有限公司 | Discharging balance adjustment device |
-
2012
- 2012-10-16 CN CN201210392302.9A patent/CN103729979A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0249321A (en) * | 1988-08-10 | 1990-02-19 | Mitsubishi Electric Corp | Switch device |
| CN2108969U (en) * | 1991-12-18 | 1992-07-01 | 魏红斌 | Multifunctional alarm |
| CN101041332A (en) * | 2006-03-21 | 2007-09-26 | 林学春 | Method and device for detecting and alarming of noxious gas inside automobile |
| CN201838149U (en) * | 2010-11-18 | 2011-05-18 | 夏庆国 | Quilt kicking and bed wetting alarm device for infant |
| CN102269041A (en) * | 2011-08-26 | 2011-12-07 | 龚文资 | Alarm circuit for poor heat radiation of automobile engine water tank |
| CN102523671A (en) * | 2011-12-28 | 2012-06-27 | 苏州天华超净科技股份有限公司 | Discharging balance adjustment device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140416 |