CN2031767U

CN2031767U - Folding writing rack

Info

Publication number: CN2031767U
Application number: CN 88204866
Authority: CN
Inventors: 吕国江
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-03-23
Filing date: 1988-03-23
Publication date: 1989-02-01

Abstract

The utility model discloses a folding writing rack, which is used as a subsidiary tool for learning and writing and can solve the defects that the inclined degrees of a horizontal desktop and a desktop are insufficient to indirectly damage the eyesight caused by the near viewing; the height of a student does not match with that of the desktop. The utility model matches with the desktop for use. By adjusting and controlling the plane angle and distance between the eye sight line and the height of a book, the utility model conforms to the photology, physiology condition, and range of vision and fixes the pages of the book. The folding writing rack can improve vision conditions, relieve the eye fatigue and physical fatigue, naturally form correct writing gesture, and prevent myopia. The folding writing rack has the advantages of easy use, convenient carryover, and low cost and is in the form of clamp after folding.

Description

Folding writing rack

The utility model relates to the desk that the study aid is write in a kind of conduct, especially the desk that is used with the desk of flat desktop and desktop gradient deficiency.

At present, domesticly generally produce and use plane or little inclined-plane desk.When primary and secondary students learn, eyes exceed desk generally at 180 millimeters to 350 millimeter.When books keep flat on the table also apart from eye one chi, and sight line forms intersecting angle (hereinafter to be referred as angle) between about 30 °～70 °.When angle during, be difficult to see clearly bookish word less than 15 °; During less than 60 °, the bloated sense of acid just appears in the eyes short time.The student always moves books apart from 5～7 cun places of eyes to unconsciously in order to see bookish word clearly.5 cun of indivedual less thaies are in the hope of obtaining greater than 70 ° of angle near 90 °.To satisfy the visual condition requirement.Especially pupil's health is little, desk is high, has just formed the closely condition and the custom of study from the entrance beginning, all can not change with preach and pressure.

When angle was too small, the each several part of each word did not wait apart from eye distance, after imaging on the retina, the font distortion and the local virtual image occurred.Cause that simultaneously the apparent distance is near excessively, eye's lens, ciliary muscle must be done limit adjusting to heavens, cause ciliary spasm, lose the long sight regulative mechanism.In the course of time, ellipse garden pathology appears in eyeball, forms myopia.The desktop of plane or inclined-plane deficiency can not satisfy optics, the physiological conditions of vision, can not all mate with student's height, is the current principal element that causes the myopia of student eye.

Task of the present utility model provides the auxiliary writing implement that desk a kind of and plane and desktop gradient deficiency is used.It can be adjusted the angle control apparent distance and reach zone of reasonableness, solves student's height and desk height mismatch problem, impels the student to form correct writing posture naturally, suitably reduces eyes and physical fatigue, prevents myopia.

For solving above-mentioned task, the solution that the utility model adopts is: set up an aid of being made up of clipboard, book brace, book clamp, limiting plate and position-limited rack that can fold on the table and finish.This clipboard and book brace are in order to fixedly books and page, conveniently read-write; This position-limited rack can stretch, adjust to the user under chin with high, the control apparent distance remains on about 1 chi; Be the file formula after this desk is folding.

Collapsible desk of the present utility model, volume is little in light weight, and the school bag of can packing into is folding easy to be easy to carry, does not hinder sight line between teacher and student, can normally bring into play and write speciality, prevent myopia, and classroom and family are dual-purpose, and material and cost of manufacture are low.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the utility model right view.

Fig. 2 is a stereogram of the present utility model.

In the utility model right view shown in Figure 1, position-limited rack (1) and mounting (2) are that two joints are telescopic injection molded, through the push-and-pull change length of can stretching, and keep height according to the frictional force of contact-making surface, make it with the user under chin with high, the control head reaches with the relative position of clipboard (12) to be controlled the apparent distance and remains on about 1 chi.Stand (2) is connected for the metal snap-fastener with limiting plate (5), can take off be placed on it the place.Adjust the angle that accommodation zone (6) and bracelet (7) change support (8), the angle that can change clipboard (12) and desktop is selected between 15 °～60 °, is optimum range between 20 °～45 ° generally.Support (8) is connected with clipboard (12) by dibit support positioning sleeve (11), and two groups of positioning sleeves in front and back and the sewing of the clipboard back side are fixing, can choose one wantonly, in the hope of obtain the clipboard angle than wide adjusting range with short support.Clipboard (12) left side is in the hinge connection with book brace (13).Book brace (13) middle part, the back side and support plate (9) are in the hinge connection, regulate rope (10) and connect the collar of sewing on support plate and book brace, adjust the angle that the length of regulating rope has changed support plate simultaneously, the left side that makes book brace is a little more than the right side, and adapt with the angle of clipboard (12), book brace (13) is gone up the elasticity book clamp (14) of riveted joint with metallic plate, spring, processing and fabricating, in order to fixing books page.Limiting plate (5) back side and location-plate (3) are in the hinge connection, and both can be parallel to each other and stick together to add external force, to reduce the volume after folding.After the relieving, location-plate (3) is connected a side with soft band (4) sagging naturally by gravity, behind the opening angle, is stuck in the relative position of a limit with fixing whole desk and desktop, avoids stressed displacement backward.Clipboard (12) limiting plate (5) is divided into hinge with middle interconnecting piece and is connected, and folding back three is the file formula, and remainder all is folded in the folder.Location-plate (3) limiting plate (5) clipboard (12) book brace (13) support plate (9) is stickup of hardboard surface or sewing oil-varnished cambric, and the connection system between adopts being flexible coupling of oil-varnished cambric stickup or sewing mutually.

Certainly, also can decorate and protection with Polypropylence Sheet at the cardboard outer surface, connect with plastic heat sealing technology according to above-mentioned principle.Also can use other sheet material to adopt other to be connected process implementing the utility model with incrustation and protective materials.

Claims

1, the desk of study aid is write in a kind of conduct, and it is characterized in that: it is made up of clipboard (12), book brace (13), limiting plate (5) and position-limited rack (1), and the clipboard left side is in the hinge connection with book brace; Clipboard front side, limiting plate rear side all are in the hinge connection with between the two the position that links to each other, and the clipboard back side is mounted with dibit support positioning sleeve (11), support (8), accommodation zone (6) and bracelet (7); Book brace left side flexible book clamp (14), the back side is mounted with support plate (9) and regulates rope (10), and the limiting plate front side is mounted with position-limited rack (1) and there are location-plate (3) and soft band (4) in stand (2), the back side, limiting plate front side.

2,, it is characterized in that position-limited rack (1), stand (2) are that binodal is telescopic by the described desk of claim 1; Stand is connected for the metal snap-fastener with limiting plate (5).