CN202084153U - Key-reminding electronic doorkeeper - Google Patents
Key-reminding electronic doorkeeper Download PDFInfo
- Publication number
- CN202084153U CN202084153U CN2011201464077U CN201120146407U CN202084153U CN 202084153 U CN202084153 U CN 202084153U CN 2011201464077 U CN2011201464077 U CN 2011201464077U CN 201120146407 U CN201120146407 U CN 201120146407U CN 202084153 U CN202084153 U CN 202084153U
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- Prior art keywords
- key
- signal
- circuit
- reminding
- people
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a key-reminding electronic doorkeeper. People often forget to bring door keys when getting out, keys are locked in rooms alone, or keys are often left in key holes when people get into the rooms and close doors, and as a result, great inconvenience is brought to the daily lives of people. The key-reminding electronic doorkeeper comprises a pressure switch (2) mounted on a doorframe (1), the pressure switch is connected with a signal receiver (3), the signal receiver is connected with a signal transmitter (4) via radio communication, and the signal transmitter is mounted on the keys. The key-reminding electronic doorkeeper is used for reminding people that the key is forgotten to take.
Description
Technical field:
The utility model relates to a kind of key and reminds the electronics entrance guard.
Background technology:
Go out and be not with the door key, key is locked in the room, or the thing that key passes into silence in lockhole of entering house of closing the door happens occasionally, and brings constant greatly for our daily life.
Summary of the invention:
The purpose of this utility model is that the problem at above-mentioned existence provides a kind of key to remind the electronics entrance guard, but whether the intelligent decision owner carries key into and out of door the time, do not find that key then carries out voice reminder.
Above-mentioned purpose realizes by following technical scheme:
Key is reminded the electronics entrance guard, its composition comprises: be installed in the pressure switch on the doorframe, described pressure switch connects signal receiving device, and described signal receiving device connects sender unit by radio communication, and described sender unit is installed on the key.
Beneficial effect:
1. the power supply of the utility model receiving trap is by the pressure switch control that is installed on the doorframe, when door is opened, be after receiving trap opens, (the signal transmission interval of radiating circuit) if in the given time, as when not receiving the ultrasonic signal that emitter sends, drive the work of sound warning circuit, remind the inlet/outlet personnel not carry key with sound and pilot lamp.This circuit is only done the key monitoring in just to the effective coverage when opening door.Key all is considered as invalid test zone outdoors or leave certain distance or avoid certain angle.Receiving trap has certain angle shielding, and emitter has the strong and weak adjustment of the signal of certain limit.Guarantee the accurate of information warning.
2. in this device transmits the dutycycle control certain hour that adopts 555 multi-resonant circuits, send burst pulse, make radiating circuit intermittent transmission signal, play province's electro ultrafiltration.
3. adopt Sheffer stroke gate to do the delay unit circuit, the high-frequency signal that crystal oscillator SAW is produced obtains the time-delay of certain hour, i.e. the effective width of the high-frequency signal of broadening crystal oscillator generation is in order to adapt to our launch requirements.
4. Men open and close two states controlled pressure switch, the work of decision receiving circuit and stopping.Door is closed when need not to monitor, and circuit quits work.
5. receiving circuit adopts two computing amplifying signals, and the signal that receives is handled.Do the time delays controlling alarm with 555 timing circuits.In order to cooperate the time delays of radiating circuit.Can guarantee when the effective delay that transmits, not report to the police.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
Accompanying drawing 2 is circuit diagrams of radiating circuit of the present utility model.
Accompanying drawing 3 is circuit diagrams of receiving circuit of the present utility model.
Embodiment:
Embodiment 1:
As shown in Figure 1: key is reminded the electronics entrance guard, its composition comprises: be installed in the pressure switch 2 on the doorframe 1, described pressure switch connects signal receiving device 3, described signal receiving device connects sender unit 4 by radio communication, and described sender unit is installed on the key.
Principle of work:
As shown in Figure 2, signal transmission circuit of the present utility model: IC1 is 555 timing circuits of core, forms multi-resonant oscillating circuit with capacitor C 1, C2, produces the burst pulse low level signal.As the spacing pulse signal that transmits, this low level signal is through Sheffer stroke gate D1 upset high level signal, as the carrier wave of emission high-frequency signal.Crystal oscillator SAW is under the effect of Sheffer stroke gate delay circuit D2, D3, produce the high-frequency pulse signal of certain time-delay, again under the effect of power amplification triode VT1, produce the pulse signal of certain frequency and power, under the effect of the higher-order of oscillation radiating circuit that Technitron VT2 and L1, C4, C5 form, launch certain hour high-frequency pulse signal at interval.
As shown in Figure 3, signal receiving circuit of the present utility model is made up of 5 part element circuits:
Antenna ANT, telefault L1, capacitor C 1 and Technitron VT1 receive, the amplifying high frequency signal circuit;
Triode VT2 capacitor C 5, C6, C7 and inductance L 2, L3 have formed frequency selection circuit.Carrier signal with receiving modulates low frequency signal; The signal that modulates is sent into dual operational amplifier IC1(LM358) and peripheral cell amplification, the shaping circuit formed.When the carrier signal that receives, when being high level during the low frequency pulse signal that modulates, luminotron VD1 is luminous.By IC2(555) form delay circuit for core parts, when the door pressure switch was closed, this receiving trap was in monitoring state.When in delay time, receiving the signal of radiating circuit emission, delay circuit zero clearing, 3 pin output noble potential.Otherwise 3 pin output electronegative potential is reported to the police.Triode VD4, luminotron VD2 and hummer BL constitute warning circuit, and the base stage of VT4 is reported to the police during for electronegative potential.
Claims (1)
1. a key is reminded the electronics entrance guard, it is characterized in that: its composition comprises: be installed in the pressure switch on the doorframe, described pressure switch connects signal receiving device, described signal receiving device connects sender unit by radio communication, and described sender unit is installed on the key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201464077U CN202084153U (en) | 2011-05-10 | 2011-05-10 | Key-reminding electronic doorkeeper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201464077U CN202084153U (en) | 2011-05-10 | 2011-05-10 | Key-reminding electronic doorkeeper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202084153U true CN202084153U (en) | 2011-12-21 |
Family
ID=45344776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201464077U Expired - Fee Related CN202084153U (en) | 2011-05-10 | 2011-05-10 | Key-reminding electronic doorkeeper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202084153U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217553A (en) * | 2014-05-04 | 2014-12-17 | 姚心怡 | Key alarming device |
| CN104329906A (en) * | 2014-11-21 | 2015-02-04 | 合肥美的电冰箱有限公司 | Door closing reminding device and refrigerator |
| CN107610428A (en) * | 2017-09-25 | 2018-01-19 | 南京律智诚专利技术开发有限公司 | Key with alarm based on radio communication technology |
| WO2018113651A1 (en) * | 2016-12-21 | 2018-06-28 | 深圳威畅通科技有限公司 | Reminding system for forgetting prevention |
-
2011
- 2011-05-10 CN CN2011201464077U patent/CN202084153U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217553A (en) * | 2014-05-04 | 2014-12-17 | 姚心怡 | Key alarming device |
| CN104329906A (en) * | 2014-11-21 | 2015-02-04 | 合肥美的电冰箱有限公司 | Door closing reminding device and refrigerator |
| WO2018113651A1 (en) * | 2016-12-21 | 2018-06-28 | 深圳威畅通科技有限公司 | Reminding system for forgetting prevention |
| CN107610428A (en) * | 2017-09-25 | 2018-01-19 | 南京律智诚专利技术开发有限公司 | Key with alarm based on radio communication technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20120510 |