CN2551101Y

CN2551101Y - School desk capable of preventing myopia

Info

Publication number: CN2551101Y
Application number: CN 02238652
Authority: CN
Inventors: 曹鸣昊; 韩鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-12
Filing date: 2002-06-12
Publication date: 2003-05-21
Anticipated expiration: 2012-06-12

Abstract

The utility model relates to a myopia prevention desk, belonging to the teaching instrument field, which is provided with a visible light alarm circuit, an infrared light emission and receiving circuit, and a time limit circuit; therefore, the utility model has the advantages of sending out light and sound signals, so as to draw students attention as well as regularly remind students of having a rest due to lacking of light and not standard sitting posture of students.

Description

Desk for preventing myopia

The utility model relates to a kind of desk for preventing myopia, belongs to the realia field.

Long insufficient light, excessive eye is the main causes that cause acquired myopia near books, a lot of children have and take off the custom of seeing written word on desk, and more so, eyes are very easily tired during insufficient light, of a specified duration might form hypometropia, even influences the backbone normal development, causes hunchback.

The utility model is on common desk, and easy warning, timing device are set, when academic environment insufficient light or excessive eye during near books, warning device can send sound and light signal, the warning children's attention, and can remind children to suspend and see written word, few thing is had a rest.

High back was low before the utility model was achieved in that the desk desktop, and about 1/3rd width in front are levels, the downward-sloping 10-20 degree of back 1/3rd width.Respectively there is a vertical sandwich plate at two ends, the desktop left and right sides, and the inboard suitable position of two sandwich plates is respectively opened an aperture, and two apertures are relative, and infrared light power valve and receiving tube are set respectively in the hole.A visible light photoresistance and light emitting diode and hummer are set in desk desktop horizontal component appropriate location.The Infrared emission receives warning circuit plate and visible light light control alarm circuit board and timing circuit plate and is arranged in the desk, and requires to electrically connect according to circuit design with infrared light power valve, receiving tube, photoresistance, light emitting diode, hummer and power supply respectively.Under normal circumstances, photoresistance is subjected to enough irradiate light, and light-operated warning horn is failure to actuate; The infrared luminous energy that the infraluminescence pipe sends is received by infrared receiving tube, and the infrared light warning horn also is failure to actuate.When insufficient light, the photoresistance resistance increases, light-operated warning horn action, hummer sounding.When children's health excessively leans forward, stopped the infrared light of infrared transmitting tube directive infrared receiving tube, the action of infrared light warning horn, light emitting diode is bright.Prescribe a time limit when timer is set when seeing that written word arrives, the hummer sounding reminds the student that few thing is had a rest.Because flat retreading before the desk desktop not only can make direction of visual lines and textbook keep than wide-angle, and limit books too away from student's health, and student's upper body needn't too be leaned forward, and is unlikely to oppress chest.Above-mentioned visible light control warning horn, infrared light warning horn and timer have the simple and easy circuit of multiple maturation available, and this paper repeats no more.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the desk for preventing myopia front elevation.

Fig. 2 is the desk for preventing myopia sectional side view.

Among the figure: 1 desk desktop horizontal component, 2, desk desktop sloping portion, 3, vertical sandwich plate, 4, the infrared light power valve, 5, the infrared light receiving tube, 6, visible light photoresistance, 7, light emitting diode, 8, hummer, 9, alarm and timing circuit plate, 10, the vertical inboard aperture of sandwich plate, 11, the time set knob.

Figure mid-infrared light power valve (4) is installed in the inboard aperture of right vertically sandwich plate, and infrared light receiving tube (5) is installed in the inboard aperture of the vertical sandwich plate in a left side, and two apertures are relative, the infrared luminous energy direct irradiation infrared receiving tube (5) that infrared transmitting tube (4) sends.Visible light photoresistance (6) is installed in desk desktop horizontal component stage casing and gives prominence to outside desktop.When infrared light is hindered shelves, when the infrared light receiving tube loses illumination, the infrared alarm action, light emitting diode (7) is bright.When the deepening of external environment condition light, photoresistance (6) resistance increases, light-operated circuit for alarming work, hummer sounding.When beginning to learn, regulate time set knob (11) and can limit the daily schedule.

Claims

A kind of desk for preventing myopia is characterized in that:

Flat retreading before a, the desk desktop, respectively there is a vertical sandwich plate at two ends, the desk desktop left and right sides, and respectively there is an aperture two sandwich plate inboards, and two holes are relative;

In b, the inboard aperture of right sandwich plate an infrared transmitting tube is arranged, in the inboard aperture of left sandwich plate an infrared receiving tube is arranged;

There is a photoresistance c, desk desktop horizontal component middle part, a light emitting diode, and a hummer, a time set knob, photoresistance is given prominence to outside desktop.