CN2185687Y - Wet type blackboard eraser - Google Patents

Abstract

The utility model relates to a new wet type blackboard eraser. The utility model is characterized in that the utility model is composed of a base plate 4 with a closing plug 5 and a sponge block 1 on the upper end of a liquid chamber 2 with a liquor expelling hole 3. When liquid is injected in the liquid chamber 2, the liquid seeps from the liquor expelling hole 3 and dips in the sponge block 1, and then the utility model can be used. The utility model has the advantages that when the utility model is used for erasing a blackboard, the utility model is equivalent to erasing by a wet method without flying dust and can enhance the depth of the color of the blackboard. The utility model has the advantages of simple structure, convenience and high durability.

Description

Wet type blackboard eraser

The utility model relates to teaching aid, the wet type blackboard eraser that special wet method erases the board.

Existing blackboard eraser, as the bristle formula when erasing the board, chalk powder flies upward, contaminated environment, and easily in the suction body, influence healthy.Other has the dust-collecting type blackboard eraser, though solved the problem of dust, wipes clean blackboard, still leaves the writing of former chalk, writes toward blackboard on again, the unclear phenomenon that has just that the handwriting is blurred, and the time one is grown, and can influence student's eyesight, and dust-sucking eraser damages easily.

The purpose of this utility model is in order to overcome the deficiency of above-mentioned dry type blackboard eraser, a kind of novel wet type blackboard eraser to be provided.

The purpose of this utility model is achieved in that in the upper end that has liquid chamber fixing on the base plate of sealing-plug a sponge piece, and the last plane of liquid chamber has a fluid hole at least.Liquid injects behind the liquid chamber to ooze out from fluid hole and is dipped into the sponge piece, can use.

The utility model has the advantages that, when erasing the board, be equivalent to wet method and clean do not have dust from flying, can strengthen the color depth of blackboard, it is very clear that each colored crayon is write.And have simple in structurely, cost is low, anti-use, free of contamination characteristics.

Description of drawings:

Accompanying drawing one is that master of the present utility model looks cutaway view.

Accompanying drawing two is vertical views of accompanying drawing one.

Each sequence number in the accompanying drawings is: 1 sponge piece, 2 liquid chambers, 3 fluid holes, 4 base plates, 5 sealing-plugs.

Below the contrast accompanying drawing is described in further detail embodiment of the present utility model.This blackboard eraser is by sponge piece 1, liquid chamber 2, and the fluid hole 3 on the liquid chamber, base plate 4, sealing-plug 5 constitutes.The upper end of the liquid chamber 2 on the base plate 4 that has sealing-plug 5 is sponge pieces 1, and the last plane of liquid chamber has a fluid hole 3 at least.The diameter of fluid hole preferably can make liquid ooze out, and does not form drip.After injecting liquid to liquid chamber 2, sealing-plug 5 is blocked up, liquid just can ooze out from fluid hole 3, is dipped in the sponge piece 1, can use.When time spent not, preferably with the sponge piece 1 on the blackboard eraser towards placement.For avoiding liquid to pass through 1 volatilization of sponge piece, can also be at the seal cover of outer surface configuration or the cover of sponge piece.

The liquid of this blackboard eraser preferably uses special liquid, to increase its serviceability.Ordinary tap water also can be used, but the effect after wiping is undesirable, and winter low temperature is noted antifreeze.

Claims (1)

1, a kind of novel wet type blackboard eraser is characterized in that there is sponge piece 1 upper end of a base plate that has a sealing-plug 54 and the liquid chamber with fluid hole 32 on it.

Images