CN2347483Y

CN2347483Y - Myopia-preventing desk and chair

Info

Publication number: CN2347483Y
Application number: CN 98208256
Authority: CN
Inventors: 黄占书
Original assignee: Individual
Current assignee: Huang Zhanshu
Priority date: 1998-09-18
Filing date: 1998-09-18
Publication date: 1999-11-10
Anticipated expiration: 2008-09-18

Abstract

The utility model relates to a myopia-preventing desk and chair. Both sides of a desktop away from the desktop by a definite height are respectively provided with an Infrared emitter and a receiver. The front edge of a desk is provided with a contact switch with a definite width. The contact switch is electrically connected with a control circuit. Legs of the desk are provided with a magnetic switch. The switching-on and the switching-off of the magnetic switch are controlled by the permanent magnet which is installed on the legs of a chair. The utility model has the advantage that the myopia-preventing desk and chair can be used for monitoring the sitting postures of a user. When the user appears incorrect sitting postures, the myopia-preventing desk and chair can alarm in time for reminding the user to maintain the best sitting posture and viewing distance.

Description

Pre-myopia prevention tables and chairs

The utility model relates to the tables and chairs with health care, refers in particular to a kind of tables and chairs with pre-myopia prevention function.

Current society enters the information age, scientific and technical develop rapidly, and people need constantly study in order to adapt to society better, the picked-up more knowledge.Yet in, the bathomorphic incidence of disease is more and more higher among the student of primary school, not only makes teacher and head of a family's uneasiness, and various circles of society also are very worried, at present also desirable without comparison way radical cure myopia is so pre-myopia prevention is more and more paid attention to by people.And the crux of pre-myopia prevention is the posture that control is write, read a book, but children's control is relatively poor, on often notice only being concentrated on reading, writing, and the sitting posture that unconsciously makes oneself produces gradually and departs from, normally point out in school by teacher, seeing by the head of a family at home, but still having a large amount of leaks, therefore be necessary chair and desk for pupils is improved.

The purpose of this utility model provides a kind of tables and chairs of pre-myopia prevention, and it can monitor that when incorrect sitting posture appearred in the user, it can be reported to the police in time, reminded the user to correct posture, kept best sitting posture and sighting distance to user's sitting posture.

The purpose of this utility model is achieved in that

A kind of pre-myopia prevention tables and chairs, include desk, chair, power supply, control circuit, alarm, it is characterized in that: the side at desktop is provided with a RF transmitter near the desktop forward position and from the position of desktop certain altitude, the position corresponding with above-mentioned RF transmitter at the opposite side of desktop is equipped with an infrared receiver, and this RF transmitter is electrically connected with power supply; This infrared receiver is electrically connected with control circuit, and to control circuit transmission signal, its signal transitive relation is when the infrared ray receiver does not receive infrared ray, and the signal that infrared receiver passes to control circuit will make control circuit start alarm equipment alarm;

Be provided with a switch that touches with certain width in the desk forward position, this touches switch and is connected electrically on the control circuit, and its electrical connection is: when switch was touched in the object contact, control circuit just started alarm equipment alarm;

On table leg, be provided with a magnetic switch, the open and close of this magnetic switch are controlled by a permanent magnet, this magnetic switch also is connected electrically on the control circuit, its electrical connection is: when permanent magnet during away from magnetic switch, control circuit just starts alarm equipment alarm, and above-mentioned permanent magnet is installed on the chair legs and is corresponding with the magnetic switch on the above-mentioned table leg.

The utility model is compared with existing tables and chairs following actively useful effect:

1, with the height of RF transmitter and receiver control user head, reading, when writing when the user is on the low side, block infrared ray, when infrared receiver can not receive infrared ray, alarm will be reported to the police, the prompting user should come back.

2, the desk forward position is provided with and touches switch, is reading a book, when writing, when user's chest leans forward, is running into and touch switch, and alarm will be reported to the police, and reminds the user to answer straight and upright back.

3, if user's chair is far from desk, so when bowing appears in the user or lean forward situation, may not block infrared ray, do not contact yet and touch switch, the utility model also is provided with magnetic switch for this reason, and will control the permanent magnet that this magnetic switch opens and close and be installed on the chair, in case chair is away from desk, alarm will be reported to the police, this design has been arranged, and user's buttocks position just is fixed, and adds above-mentioned RF transmitter, receiver and the mating reaction of touching switch, just can in time remind the user to keep coming back and the straight and upright correct sitting posture of back, be particularly suitable for being in the students in middle and primary schools in physical and mental development stage and use.

Now in conjunction with the accompanying drawings the utility model is described in further detail as follows with preferred embodiment:

Fig. 1 is an embodiment of the utility model desk;

Fig. 2 is another embodiment of the utility model desk;

Fig. 3 is the another embodiment of the utility model desk;

Fig. 4 is an embodiment again of the utility model desk;

Fig. 5 is the structural representation of the utility model chair;

Fig. 6 is a schematic block circuit diagram of the present utility model:

Fig. 7 is an embodiment of circuit shown in Figure 6.

See also Fig. 1, pre-myopia prevention tables and chairs of the present utility model, respectively be provided with a riser 2 in the desktop both sides of desk 1, near the desktop forward position and be provided with an infrared ray from the position of desktop certain altitude and send out device 3, an infrared receiver 4 is installed on the riser 2 of the opposite side of the desktop position corresponding with above-mentioned RF transmitter on the riser 2 wherein; See also Fig. 2, RF transmitter 3 and receiver 4 can also be installed on the L shaped bar 5: see also Fig. 3, this L shaped bar 5 can be made lift, at ordinary times time spent not, this L shaped bar 5 can be placed the desktop both sides, during use, L shaped bar 5 is risen; See also Fig. 4, RF transmitter 3 and receiver 4 can also be installed on the bar 6 that sways.See also Fig. 6, this RF transmitter is electrically connected with power supply; This infrared receiver is electrically connected with control circuit, transmits signal to control circuit, and its signal transitive relation is when the infrared ray receiver does not receive infrared ray, and the signal that infrared receiver passes to control circuit will make control circuit start alarm equipment alarm; Height with RF transmitter and receiver control user head, work as user's infrared ray that blocks on the low side in reading, when writing, when infrared receiver can not receive infrared ray, alarm will be reported to the police, remind the user to come back, keep the distance of eyes and books suitable.

See also Fig. 1, Fig. 2, Fig. 3, Fig. 4, be provided with in the forward position of desk 1 one have a certain width touch switch 7, this touches switch 7 and also is connected electrically on the control circuit, and its annexation is: when switch 7 was touched in the object contact, control circuit just started alarm equipment alarm; In reading, when writing, when leaning forward to run into, user's chest touches switch, and alarm will be reported to the police, and reminds the user should straight and upright back.

On the leg of desk 1, be provided with a magnetic switch 8, the open and close of this magnetic switch 8 are by a permanent magnet 9 controls, this magnetic switch 8 also is connected electrically on the control circuit, its annexation is when permanent magnet 9 during away from magnetic switch 8, control circuit just starts alarm equipment alarm, and above-mentioned permanent magnet 9 is installed on the leg of chair 10 and is corresponding with magnetic switch 8 positions on the leg of above-mentioned desk 1.This is because if chair is far from desk, when the user bows or leans forward so, may not block infrared ray, do not contact yet and touch switch, the utility model is provided with magnetic switch 8 for this reason, and will control the permanent magnet 9 that this magnetic switch 8 opens and close and be installed on the chair 10, in case chair 10 is away from desk, alarm will be reported to the police, this design has been arranged, and user's buttocks position just has been fixed, and adds above-mentioned RF transmitter 3, receiver 4 and the mating reaction of touching switch 7, just can in time remind the user to keep coming back and the straight and upright correct sitting posture of back, be particularly suitable for being in the students in middle and primary schools in physical and mental development stage and use.

The physical circuit of finishing circuit function shown in Figure 6 is a lot, now only lift an example, as Fig. 7, form the infrared emission circuit with triode BG1, BG2 and infrared emission tube D1 in the circuit, constitute infrared receiving circuit by incorporate infrared receiving terminal FPS-4091, switch is touched in the K1 representative, and K2 represents magnetic switch, BG3 constitutes control circuit by triode, constitutes alarm by LED.When one of K switch 1, K2 connect or FPS-4091 when not receiving infrared ray, the base potential of triode BG3 will raise, and makes the BG3 conducting, thereby makes the LED conducting, and LED is luminous, and expression user sitting posture is incorrect, should correct.Fig. 7 has only provided the simplest a kind of embodiment of the utility model circuit, the circuit of finishing circuit function shown in Figure 6 is a lot, all belong to prior art, all can be used in the utility model as long as conform to the physical circuit of the block diagram function of Fig. 6, so the utility model is no longer given unnecessary details other physical circuit.In order to adapt to the user of different heights, desk of the present utility model can be made height-adjustable, a kind of embodiment as shown in Figure 1, on each leg of desk 1, have screw hole 11, screw hole 13 on the engage 12, with bolt hole 11 and 13 is placed, just can obtain the desk of differing heights, chair 10 shown in Figure 5 also can use the same method and to make adjustment height, screw is also opened in open screw hole 14 on two legs of chair 10 on chair seat 15, the height of chair seat 15 just can be regulated, the utility model all is suitable for concerning the user of different height like this, therefore uses general enclosing extensively.And needn't be because of the growth at age concerning same student, the variation of height, and change tables and chairs, saved spending.

Claims

1. pre-myopia prevention tables and chairs, include desk, chair, power supply, control circuit, alarm, it is characterized in that: the side at desktop is provided with a RF transmitter near the desktop forward position and from the position of desktop certain altitude, the position corresponding with above-mentioned RF transmitter at the opposite side of desktop is equipped with an infrared receiver, and this RF transmitter is electrically connected with power supply; This infrared receiver is electrically connected with control circuit, and to control circuit transmission signal, its signal transitive relation is when the infrared ray receiver does not receive infrared ray, and the signal that infrared receiver passes to control circuit will make control circuit start alarm equipment alarm;