CN2134683Y - Vision distance alarm - Google Patents
Vision distance alarm Download PDFInfo
- Publication number
- CN2134683Y CN2134683Y CN 92220308 CN92220308U CN2134683Y CN 2134683 Y CN2134683 Y CN 2134683Y CN 92220308 CN92220308 CN 92220308 CN 92220308 U CN92220308 U CN 92220308U CN 2134683 Y CN2134683 Y CN 2134683Y
- Authority
- CN
- China
- Prior art keywords
- sighting distance
- warning device
- infrared
- distance warning
- receiver
- Prior art date
- 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
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The utility model relates to a vision distance alarm, which comprises a case body with a hole and a ribbon-shaped fixer, wherein, the case body is provided with power supply, an emitter, a receiver, and a signal output device. When used, the utility model is worn on the wrist or the finger of a person, making the loophole of the vision distance alarm align to the face of the person, and when the vision distance is too short, the vision distance alarm can send out alarm signals with red light.
Description
The utility model relates to a kind of sighting distance warning device.
In the prior art, vision protection device generally is made up of power supply, transmitter, receiver and signal output device, and transmitter, receiver are installed on respectively on separately the support or bearing, and use occasion is limited, is not easy to carry.And sound when reporting to the police, influence other people.
The purpose of this utility model is to provide a kind of volume little, is easy to carry the sighting distance warning device that the unrestricted student's reading and writing of use occasion are used.
For achieving the above object, the utility model adopts following proposal: power supply, transmitter, receiver and signal output device place on same housing with holes 2, the housing 2 band stabilizer 1 are housed.This device can be made into watch style or finger ring type, can be worn on the wrist during use, on the finger or be placed on the penholder.Housing 2 with holes is made by plastics or metal material, and light hole 3,4,5 is arranged on it.Band stabilizer 1 is made by metal or nonmetallic materials.Power supply adopts minicell.Transmitter belongs to infrared transmitter, is formed, can be sent infrared light by free-running multivibrator, amplifier and light emitting diode.Receiver is made up of the photosensitive triode of infrared ray, frequency-selective circuit, rectifier and amplifier.The light that infrared transmitter is sent runs into people face back reflection and returns, and,, select the pulse signal identical with the free-running multivibrator oscillation frequency by frequency-selective circuit by the photosensitive triode reception of infrared ray, through the rectifier half-wave rectification, signal is amplified again by amplifier.Signal output device is made up of triode and light emitting diode, and when sighting distance during less than 33 centimetres, the amplifier amplifying signal of infrared transmitter is enough to make the triode conducting, and light emitting diode just has electric current to pass through and luminous, and the reminds people sighting distance is too little.
The utility model has been compared following advantage with existing vision protection device:
1, installation, easy to carry, use occasion is unrestricted.To place same housing to form as a whole because of its each ingredient, and volume is little, and band stabilizer is arranged, and can be worn on wrist, the finger or be placed on the penholder.
2, owing to be luminous warning, can carry, use at any time, not influence other people.
Content of the present utility model is further described with the following Examples.
Fig. 1 is the outside drawing of embodiment.
Fig. 2 is the electronic circuitry among the embodiment.
As shown in Figure 1 and Figure 2, the sighting distance warning device among the embodiment has band stabilizer 1, housing with holes 2, infrared hole 3, infrared receiving aperture 4 and VISIBLE LIGHT EMISSION hole 5.During use; the sighting distance warning device is worn on the wrist; and make three holes on the housing aim at face; (books are to the distance of eyes when sighting distance; be approximately equal to the distance of warning device to eyes) during less than 33 centimetres; ruddiness is appeared in VISIBLE LIGHT EMISSION hole 5, reminds reading and writing person to increase sighting distance, to reach the purpose of protection eyes.
Electronic circuit in the present embodiment is by power supply E(button cell), infrared transmitter, infrared receiver and signal output device four parts form.Its principle is resistance R
1, R
2, R
3, R
4, capacitor C
1, C
2With triode BG
1, BG
2Constitute free-running multivibrator together, produce oscillator signal according to certain frequency of operation, through triode BG
3Amplify rear drive infrared light-emitting diode D
1Send infrared light (invisible modulated infrared), its range and infrared light-emitting diode D
1Emissive power be directly proportional, and by variable resistor R
5Modulation.When the infrared ray that the infrared ray light emitting diode is launched, will reflect when running into people face and by the photosensitive triode BG of infrared ray
4Receive, through triode BG
5And resistance R
7The amplifying return circuit of forming amplifies, by capacitor C
3, variable resistor R
6The loop frequency-selecting of forming is selected and infrared light-emitting diode D
1The pulse signal that the signal frequency of launching is identical is again through resistance R
8Current limliting, through resistance R
9, triode BG
6The amplifying return circuit of forming amplifies, and passes through capacitor C
4Coupling, diode D
2After the half-wave rectification, make by resistance R
10, triode BG
7The loop obtain positive bias and conducting.Conducting is after capacitor C
5To triode BG
8Base current is provided, it is satisfied rapidly close conducting, light emitting diode D
3Electric current is arranged by sending visible light, remind the person of writing, reader to increase sighting distance.
The utility model electronic circuit can be made a plurality of little integrated circuit, and further reduced volume can be made finger ring type again and be worn on the thumb or be placed on the penholder.
Claims (6)
1, a kind of sighting distance warning device comprises power supply, transmitter, receiver and signal output device, it is characterized in that power supply, transmitter, receiver and signal output device all place a housing 2, connects band stabilizer 1 on the housing 2.
2, sighting distance warning device according to claim 1 is characterized in that power supply adopts minicell.
3, sighting distance warning device according to claim 1 is characterized in that transmitter is made up of free-running multivibrator, amplifier and light emitting diode, can send infrared light.
4, sighting distance warning device according to claim 1 is characterized in that receiver is made up of the photosensitive triode of infrared ray, frequency-selective circuit, rectifier and amplifier, can receive infrared light.
5, sighting distance warning device according to claim 1 is characterized in that signal output device is made up of triode and light emitting diode.
6, sighting distance warning device according to claim 1 is characterized in that housing 2 has infrared hole 3, infrared receiving aperture 4 and VISIBLE LIGHT EMISSION hole 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220308 CN2134683Y (en) | 1992-09-21 | 1992-09-21 | Vision distance alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220308 CN2134683Y (en) | 1992-09-21 | 1992-09-21 | Vision distance alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2134683Y true CN2134683Y (en) | 1993-05-26 |
Family
ID=33767361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92220308 Expired - Fee Related CN2134683Y (en) | 1992-09-21 | 1992-09-21 | Vision distance alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2134683Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104063998A (en) * | 2014-07-09 | 2014-09-24 | 广东小天才科技有限公司 | Device for assisting user in writing and sitting posture warning method |
| CN105575070A (en) * | 2015-06-25 | 2016-05-11 | 宇龙计算机通信科技(深圳)有限公司 | Sitting posture adjustment prompting method and wearable device |
-
1992
- 1992-09-21 CN CN 92220308 patent/CN2134683Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104063998A (en) * | 2014-07-09 | 2014-09-24 | 广东小天才科技有限公司 | Device for assisting user in writing and sitting posture warning method |
| CN104063998B (en) * | 2014-07-09 | 2017-03-22 | 广东小天才科技有限公司 | Device for assisting user in writing and sitting posture warning method |
| CN105575070A (en) * | 2015-06-25 | 2016-05-11 | 宇龙计算机通信科技(深圳)有限公司 | Sitting posture adjustment prompting method and wearable device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE37531E1 (en) | System for identifying object locations | |
| US6573833B1 (en) | Acoustic finding system | |
| US4507653A (en) | Electronic sound detecting unit for locating missing articles | |
| US5939981A (en) | Item locator with attachable receiver/transmitter | |
| US4476469A (en) | Means for assisting in locating an object | |
| US6459376B2 (en) | Radio frequency identification devices, remote communication devices, wireless communication systems, and methods of indicating operation | |
| US4075621A (en) | Hand held communication aid for the dumb | |
| US10546484B2 (en) | Personal safety device | |
| US6011466A (en) | Sealed golf ball with remotely activated audible sound generator powered by an electromagnetically rechargeable battery | |
| TWI630587B (en) | Watch with help function | |
| CN2134683Y (en) | Vision distance alarm | |
| CN108765898A (en) | The anti-lost positioning devices of mini based on bluetooth 4.0 | |
| WO2004049603A1 (en) | Information support system | |
| US6701094B1 (en) | Battery-powered IR transmitter having constant power output | |
| US5389915A (en) | Child separation alarm with safety pin actuation means | |
| CN204634116U (en) | With the intelligent desk lamp of social functions | |
| AU3108784A (en) | Electronic sound detecting unit for locating missing articles | |
| RU112601U1 (en) | ELECTRONIC ICON | |
| CN2105268U (en) | Signal feedback sight protector | |
| CN217216536U (en) | Low-power consumption dual-mode wireless control device | |
| CN210986489U (en) | Multipurpose multifunctional strip L ED lamp | |
| CN214480768U (en) | Mobile phone protection shell with photosensitive element | |
| GB2334940A (en) | Badge with visual or audio display actuated electrically | |
| KR200382128Y1 (en) | Remote radiating sound telephone | |
| JP3038786U (en) | Jewelry with an incoming call notification function |
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 |