CN202128079U - Anti-myopia seat - Google Patents
Anti-myopia seat Download PDFInfo
- Publication number
- CN202128079U CN202128079U CN201120229477U CN201120229477U CN202128079U CN 202128079 U CN202128079 U CN 202128079U CN 201120229477 U CN201120229477 U CN 201120229477U CN 201120229477 U CN201120229477 U CN 201120229477U CN 202128079 U CN202128079 U CN 202128079U
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- China
- Prior art keywords
- seat
- circuit
- power switch
- warning
- warning circuit
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Abstract
An anti-myopia seat belongs to the field of articles for students and comprises a seat, a power source, a power switch, a light operated circuit and a warning circuit. The power source, the power switch, the light operated circuit and the warning circuit are connected through wires, the power source, the light operated circuit and the warning circuit are mounted in a plastic box and fixed on a backrest of the seat, and the power switch is mounted below a seat cushion of the seat. A self-restoring normally on contact microswitch serves as the power switch. When a student sits on the seat, the power switch can be pressed and turned on. A photosensitive resistor of the light operated circuit can be blocked by a back of a student sitting correctly and leaning back so that the warning circuit is disabled, and when the student sits incorrectly and bends forward to make the back leave the photoresistor, the light operated circuit is switched on to power and enable the warning circuit to send out loud warning voice reminding students. The anti-myopia seat is suitable for families, schools and the like, simple in structure and convenient in use, and has fine application prospect.
Description
Technical field
The utility model relates to the apparatus that prevents myopia of student, thereby especially can send a kind of myopia prevention seat that chimes of doom is reminded according to the sitting posture of student correctness.
Background technology
At present, knownly prevent near-sighted seat, complex structure uses inconvenience, can not accomplish effectively to prevent near-sighted warning reminding.
The utility model content
The purpose of the utility model is to overcome to have now to prevent near-sighted seat, and complex structure uses inconvenience, can not accomplish effectively to prevent near-sighted warning reminding, provides a kind of simple in structure, easy to use, can effectively accomplish to prevent a kind of myopia prevention seat of near-sighted warning reminding.
The purpose of the utility model is achieved in that
A kind of myopia prevention seat; Comprise seat; It is characterized in that constituting by power supply, power switch, light-operated circuit and warning circuit; Connect through lead between power supply, power switch, light-operated circuit and the warning circuit, power supply, light-operated circuit and warning circuit are installed in the plastic casing and are fixed on the backrest, and power switch is installed under the cushion of seat.
Described power switch is from resetting the normally opened contact microswitch.
Described light-operated circuit is made up of photo resistance and NPN triode, connects through lead therebetween, when photo resistance is installed in the plastic casing, should be exposed at its sensitive surface outside the plastic casing.
Described warning circuit is made up of warning integrated circuit, PNP triode, loudspeaker and electrochemical capacitor, connects through lead therebetween.
The utility model utilization, will be pushed down power switch and make it to open when the student is sitting on the seat from resetting the normally opened contact microswitch as power switch; When sitting posture is correct; The back leans on the photo resistance that will cover light-operated circuit that warning circuit is not worked backward; When abnormal sitting posture really turns forward the back when leaving photo resistance, light-operated circuit will conducting and to warning circuit power supply makes it to send loud alarm sound and reminds the student.Be applicable to family, school etc.The utility model is simple in structure, and is easy to use, so have good application prospect.
Description of drawings
Fig. 1 is the utility model structured flowchart; Fig. 2 is the circuit diagram of the utility model.
The specific embodiment
Shown in Fig. 1; A kind of myopia prevention seat; Comprise seat, constitute, connect through lead between power supply, power switch, light-operated circuit and the warning circuit by power supply, power switch, light-operated circuit and warning circuit; Power supply, light-operated circuit and warning circuit are installed in the plastic casing and are fixed on the backrest, and power switch is installed under the cushion of seat.Power switch is from resetting the normally opened contact microswitch.Light-operated circuit is made up of photo resistance and NPN triode, connects through lead therebetween, when photo resistance is installed in the plastic casing, should be exposed at its sensitive surface outside the plastic casing.Warning circuit is made up of warning integrated circuit, PNP triode, loudspeaker and electrochemical capacitor, connects through lead therebetween.
As shown in Figure 2, G is a power supply; SB is a power switch; Form light-operated circuit by photo resistance RL and NPN triode VT1; Form warning circuit by warning integrated circuit A, PNP triode VT2, loudspeaker B and electrochemical capacitor C.When using the utility model to be sitting on the seat, will push down and be positioned at the SB under the Chain cushion and make it to open; When sitting posture was correct, the back is leaned on backward will cover RL, and RL is high resistance, and VT1 is in cut-off state, and warning circuit is not worked; When abnormal sitting posture really turns forward the back when leaving RL, light impinges upon on the RL, and RL resistance descends rapidly, and VT1 promptly gets into conducting state, does so warning circuit gets the electrician; Warning circuit gets the electrician and makes back A from its 2nd pin output audio signal, sends loud alarm sound through VT2 power amplification rear drive B and reminds the user; When adjusting sitting posture, after the back covered RL, warning circuit can dead electricity quit work again.The effect of C is the interchange internal resistance when eliminating the light-operated circuit conducting, in order to avoid influence the work of warning circuit.
In Fig. 2, G adopts three joint No.5 cells, and voltage is 4.5V; SB is small-sized from resetting the normally opened contact microswitch; RL is the photo resistance of MG45 type, and the VT1 model is 9013; A is a LC170 type warning integrated circuit, and the VT2 model is 9012, and B is the small-bore coil-moving speaker of model 8 Ω, 0.25W, and the model of C is 10V/47UF.
Claims (1)
1. myopia prevention seat; Comprise seat; It is characterized in that constituting by power supply, power switch, light-operated circuit and warning circuit; Connect through lead between power supply, power switch, light-operated circuit and the warning circuit, power supply, light-operated circuit and warning circuit are installed in the plastic casing and are fixed on the backrest, and power switch is installed under the cushion of seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120229477U CN202128079U (en) | 2011-07-01 | 2011-07-01 | Anti-myopia seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120229477U CN202128079U (en) | 2011-07-01 | 2011-07-01 | Anti-myopia seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202128079U true CN202128079U (en) | 2012-02-01 |
Family
ID=45516867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120229477U Expired - Fee Related CN202128079U (en) | 2011-07-01 | 2011-07-01 | Anti-myopia seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202128079U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105902008A (en) * | 2016-05-03 | 2016-08-31 | 浙江大学城市学院 | Anti-myopia sitting posture correcting cushion and control method |
-
2011
- 2011-07-01 CN CN201120229477U patent/CN202128079U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105902008A (en) * | 2016-05-03 | 2016-08-31 | 浙江大学城市学院 | Anti-myopia sitting posture correcting cushion and control method |
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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: 20120201 Termination date: 20130701 |