CN102145621A - Clean-free unreflective blackboard - Google Patents

Abstract

The invention discloses a clean-free unreflective blackboard which is characterized by comprising black writing cloths, two scrolls, two lining plates, a felted cloth, a chalk dust box and a motor, wherein two ends of the black writing cloths are jointed together to form a cylinder which is tightly sleeved between the upper scroll and the lower scroll; one ends of the scrolls are connected with the motor; the lining plates are respectively installed at the backs of the black writing cloths for supporting a writing surface and a cleaning surface respectively; the felted cloth is jointed with the cleaning surface; and a strip-shaped chalk dust box is installed at the lower end of the felted cloths. When the blackboard is used, the clean-free and unreflective effects can be achieved, and chalk dust flying in the air is avoided, so that the writing on the blackboard can be seen cleanly at reflective angles.

Description

A kind of not reflective blackboard of wiping of exempting from

Technical field

The invention belongs to the educational outfit technical field, particularly a kind of not reflective blackboard of wiping of exempting from.

Background technology

Normal blackboard has reflective when certain angle is seen writing on the blackboard, and chalk dust is existed everywhere when erasing the board, to teacher with to be sitting in front-seat students' union influential.

Summary of the invention

The present invention seeks to provides a kind of not reflective blackboard of exempting to wipe at the defective that prior art exists.

The present invention adopts following technical scheme for achieving the above object:

A kind of exempting from wiped not reflective blackboard, it is characterized in that: comprise black writing cloth, two spools, two blocks of liner plates, felt-cloth, chalk dust box and motor; Described black writing cloth two ends are bonded together, and form cylinder, tighten to be enclosed between described two spools up and down, and spool one end is connected with described motor; The described black writing cloth back side respectively is equipped with a liner plate, supports writing surface and scouring face respectively, and described felt-cloth engages with scouring face, and described felt-cloth lower end is equipped with strip chalk dust box.

Use the blackboard of inventing to reach and exempt to wipe and opaque effect, avoided chalk dust to fly upward over the sky, make all angles can both see writing on the blackboard clearly.

Description of drawings

Fig. 1 is the invention schematic diagram

1, black writing cloth 2, spool 3, liner plate 4, felt-cloth 5, chalk dust box 6, motor

The specific embodiment

As shown in Figure 1, a kind of exempting from wiped not reflective blackboard, comprises 2, two blocks of liner plates 3 of 1, two spool of black writing cloth, felt-cloth 4, chalk dust box 5 and motor 6; Described black writing cloth 1 two ends are bonded together, and form cylinder, tighten to be enclosed between described two spools 2 up and down, and spool 2 one ends are connected with described motor 6; Described black writing cloth 1 back side respectively is equipped with a liner plate 3, supports writing surface and scouring face respectively, and described felt-cloth 4 engages with scouring face, and described felt-cloth 4 lower ends are equipped with strip chalk dust box 5.

On black writing cloth writing surface, write during use,, therefore can both see writing on the blackboard clearly in all angles because black writing cloth surface is diffuse reflection.When writing on the blackboard has been expired need wipe the time, start motor, the driven by motor spool rotates, black writing cloth is followed spool simultaneously and is rotated, write the part black writing cloth and the felt-cloth relative motion friction that is positioned at scouring face of word, the writing of writing is wiped, when black writing cloth turns to writing surface once more, can be carried out writing on the blackboard again.The chalk dust box can be collected the chalk dust that falls when wiping writing, regularly cleaning.Carry out at the back of blackboard owing to wipe the process of writing, so just avoided chalk dust to fly upward everywhere.

Claims (1)

1. exempt to wipe not reflective blackboard for one kind, it is characterized in that: comprise black writing cloth (1), two spools (2), two blocks of liner plates (3), felt-cloth (4), chalk dust box (5) and motor (6); Described black writing cloth (1) two ends are bonded together, and form cylinder, tighten to be enclosed within describedly up and down between two spools (2), and spool (2) one ends are connected with described motor (6); Described black writing cloth (1) back side respectively is equipped with a liner plate (3), supports writing surface and scouring face respectively, and described felt-cloth (4) engages with scouring face, and described felt-cloth (4) lower end is equipped with strip chalk dust box (5).