CN201291695Y

CN201291695Y - Dustless eraser

Info

Publication number: CN201291695Y
Application number: CNU2008203027608U
Authority: CN
Inventors: 张少士
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-13
Filing date: 2008-11-13
Publication date: 2009-08-19
Anticipated expiration: 2018-11-13

Abstract

The utility model relates to an auxiliary teaching appliance, namely a dustless blackboard eraser. The dustless blackboard eraser comprises an eraser plate body, and eraser rollers are oppositely inlayed on the eraser surface of the eraser plate body in a compartmental manner; a ratchet mechanism which rotates in a unidirectional manner is arranged at the upper end of each eraser roller, and the two eraser rollers reversely rotate; and a dust-collecting box is connected on the eraser plate body corresponding to the lower ends of the two eraser rollers. When a blackboard is cleaned from right to left by the blackboard eraser, the eraser roller at the left side rotates without cleaning dust, and the eraser roller at the right side cleans dust; at the moment, the eraser roller at the left side exerts the function of closing; therefore, chalk dust is controlled in a plate box and falls into the dust-collecting box under the plate box. When the blackboard is cleaned from left to right, the working principle is similar to the above. The dustless blackboard eraser is beneficial for the health of teachers and students without changing the traditional using habits. The dustless blackboard eraser has the characteristics of reasonable design, simple structure, convenient utilization, good durability, low price and easy popularization.

Description

Ashless blackboard eraser

Technical field

The utility model relates to a kind of teaching appurtenance, promptly ashless blackboard eraser.

Background technology

In prior art, traditional blackboard is to be used for a kind of apparatus of the letter written with chalk that wiping writes on the blackboard, and is the teaching aid that present middle and primary schools generally use.Present employed blackboard eraser is to be bonded at simple and easy blackboard eraser on the wiping board body by felt, and this blackboard eraser chalk dust when erasing the board can fly everywhere, so promptly the healthy of teacher is worked the mischief, and again classroom environment is polluted.Although improved blackboard eraser is of a great variety, structure is different, and structure is unreasonable.

The utility model content

The purpose of this utility model is to provide a kind of ashless blackboard eraser rational in infrastructure at above-mentioned deficiency.

The technical solution of the utility model is: ashless blackboard eraser, comprise the wiping board body, and on wiping board body wiping face, stud with relative wiping roller at interval; Each wipes the ratchet mechanism that the roller upper end all is equipped with one-directional rotation, wipes the roller switched in opposite for two; Be connected with on the wiping board body of corresponding two wiping roller lower ends and receive grey box.With board-like wiping face, be designed to take turns roll-type and wipe face, there are two to wipe roller in the blackboard eraser, wipe roller and stud with ratchet restriction direction of rotation, one anti-one just, wiping roller with these two is installed in the wiping board body board wiper box, when blackboard eraser erased the board from right to left, wherein roller (preceding wiping roller) rotation was wiped in the left side, does not wipe ash, what wipe ash is that roller (not rotating) is wiped on the right side, at this moment the left side is wiped roller and is played sealing process, and chalk dust is bound in the plate box like this, and falls into following receipts ash box (ash collecting box), when erasing the board from left to right, operation principle is the same.This blackboard eraser is light to be suitable for, and most of chalk dust is collected in to be received in the grey box, and then reaches ashless.Ashless promptly is chalk dust to be strapped in the enclosure and with it collect in the ash collecting box, and it is arbitrarily descended slowly and lightly, and concentrates at last and outwells.It is to use for convenient local wiping writing that a little blackboard eraser, purpose are arranged in the upper end of wiping board body.

The utility model has the advantages that: 1, do not change traditional use habit, solved the problem that teacher, student eat chalk dust for many years, it is healthy to help Faculty and Students.2, reasonable in design, simple in structure, easy to use, durable, low price helps promoting the use of.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Description of drawings

Fig. 1 is the utility model structure diagram.

Fig. 2 is Fig. 1 left side TV structure sketch.

Fig. 3 is that blackboard wiping is wiped the motion schematic diagram to the right.

Fig. 4 is that blackboard wiping is wiped the motion schematic diagram left.

The specific embodiment

Referring to Fig. 1,2, ashless blackboard eraser comprises wiping board body 1 (plastic box body), studs with

relative wiping roller

2,3 at interval on the wiping board body 1 wiping face; Each wipes the ratchet mechanism that roller 2,3 upper ends all are equipped with one-directional rotation, realizes that a direction rotates, and

wipes roller

2,3 switched in opposite for two, commentaries on classics in two rollers when maintenance erases the board, and another does not change.Be connected with on the wiping board body 1 of corresponding two

wiping roller

2,3 lower ends and receive grey box 4, receive grey box 4 and peg graft, conveniently pour out chalk dust with wiping board body 1.

Wiping board body 1 upper end wipes 5 with a platelet, convenient local wiping writing.Each is wiped in

roller

2,3 and the platelet wiping 5 and is stained with felt.

Referring to Fig. 3, when direction erases the board from left to right, to wipe roller 2 and rotate, wiping roller 3 is motionless, and wiping roller 3 is wiped ash, wipes roller 3 preceding chalk dusts and can fall in the grey box 4 of receipts.

Referring to Fig. 4, when direction erases the board from right to left, to wipe roller 3 and rotate, wiping roller 2 is motionless, and wiping roller 2 is wiped ash, wipes roller 2 preceding chalk dusts and can fall in the grey box 4 of receipts.

Claims

1. an ashless blackboard eraser comprises wiping board body (1), it is characterized in that studding with on wiping board body (1) the wiping face relative wiping roller (2,3) at interval; Each wipes the ratchet mechanism that roller (2,3) upper end all is equipped with one-directional rotation, wipes roller (2,3) switched in opposite for two; Be connected with on the wiping board body (1) of corresponding two wiping roller (2,3) lower ends and receive grey box (4).

2. according to the described ashless blackboard eraser of claim 1, it is characterized in that wiping board body (1) upper end is with a little blackboard eraser (5).