CN2389074Y - Low presure dust-removing eraser for blackboard - Google Patents

Abstract

The utility model relates to a low-pressure dust-removing blackboard eraser. By using the characteristic that airflow flows towards low pressure positions and drives dust to concentrate towards a low pressure area, the utility model provides a dust-removing blackboard eraser provided with a flexible air bag and one-way valves. An eraser board is provided with a hole; a blackboard eraser seat comprises the flexible air bag, a dust containing chamber, a dust filter chamber and a one-way piston, wherein, an only-out one-way valve is arranged in the flexible air bag, a cavity of the flexible air bag is communicated with the dust filter chamber by an only-in one-way valve; the dust containing chamber and the dust filter chamber are separated by a filter plate; the eraser board is embedded in the blackboard eraser seat. The utility model can be used for cleaning blackboards, stone boards, etc.

Description

The low pressure Dust-removing blackboard eraser

The utility model relates to a kind of Dust-removing blackboard eraser.

ZL97211346.0 discloses a kind of " blackboard eraser of replaceable hairbrush ", constitute by blackboard eraser seat, hairbrush, its blackboard eraser seat inside is cavity, and the dividing plate that vertically is arranged on wherein is divided into different zones, have slotted hole in each regional upper and lower surface symmetry, slotted hole one end broad, one end is narrower, the pressure roller parallel with dividing plate passes an end of slotted hole broad, respectively there is an annular groove at the two ends of pressure roller, the size of the pressure roller diameter of groove and the narrower end of slotted hole adapts, and hairbrush is arranged on pressure roller and between the dividing plate of slotted hole broad one end.Because have the gap between the hairbrush of blackboard eraser and the hairbrush, then the dust that is brushed down can enter in the cavity of blackboard eraser seat by these gaps.From this as can be seen dust collection manner of above narration is after the cavity that utilizes two hairbrush and blackboard eraser seat to form is sealed by blackboard, dust is brushed into control of dust cavity, after so each wiping is intact, if untimelyly topple over dust, next time, dust will come out from dust storage chamber when erasing the board, and equally also can cause a part to pollute, to topple over once if wiped all at every turn, will bring many inconveniences.

At the problems referred to above, the utility model can address the above problem effectively by a kind of control of dust blackboard eraser is provided.

For achieving the above object, the technical scheme that the utility model adopted is: the Dust-removing blackboard eraser that is made of blackboard eraser seat and wiping board, have hole on the wiping board, be used to into dirt, the blackboard eraser seat comprises soft air bag, holds dirt chamber, dust chamber and one-way piston, and wherein soft air bag inside has and only goes out check valve, and the cavity of soft air bag can hold check valve and the dust chamber that gas enters soft air bag by one and communicate, separate with a filter plate between appearance dirt chamber and the dust chamber, wiping board embeds in the blackboard eraser seat.When object moves in air in principle, can near object, form negative pressure, near the negative pressuren zone of surrounding air object flowed, driving dust assembles to object, enter appearance dirt chamber by the hole on the wiping board, depress soft air bag simultaneously, make blackboard eraser seat internal negative pressure increase, thereby increase absorption affinity, improve dust removing effects dust.

Owing to adopted technique scheme, the utlity model has stronger dust adsorption capacity, can shorten dust flotation time and floating radius effectively, reduce dust density, reduce air-borne dust and pollute.Meet the requirement of people to environmental protection and health care.

Below in conjunction with accompanying drawing the utility model being done one describes in detail:

Fig. 1 is the structural representation of blackboard eraser seat;

Fig. 2 is the structural representation of wiping board;

Fig. 3 is the structural representation of another kind of wiping board.

As shown in Figure 1, the low pressure Dust-removing blackboard eraser is made of blackboard eraser seat 1 and wiping board 2; Wiping board 2 has hole 3 as can be seen from Fig. 2, Fig. 3, is used to into dirt; Blackboard eraser seat 1 comprises soft air bag 4, holds dirt chamber 5, dust chamber 6 and one-way piston 7,8, wherein soft air bag 4 inside have and only go out check valve 7, the cavity of soft air bag 4 can hold check valve 8 and the dust chamber 6 that gas enters soft air bag by one and communicate, separate with a filter plate 9 between appearance dirt chamber 5 and the dust chamber 6, wiping board 2 embeds in the blackboard eraser seats 1.

Hold blackboard eraser during use and make dust chamber upwards, appearance dirt chamber is downward, and soft air bag is aimed in the centre of the palm, and according to wiping amount size, the frequency of the soft air bag of decision extruding is pushed once soft air bag, and the low pressure air-flow can be kept 10 seconds, can carry out effectively wiping among a small circle; The soft air bag of uninterrupted extruding can carry out continuous effective wiping on a large scale in 10 seconds.Wait to hold that the dust of dirt chamber is long-pending opens the clear dirt in dedusting hole that holds the dirt chamber during to 1/3 capacity (being equivalent to finish 9 square metres of writing on the blackboard wiping amounts), use then.

Claims (1)

1, low pressure Dust-removing blackboard eraser, comprise blackboard eraser seat and wiping board, it is characterized in that: have hole on the wiping board, the blackboard eraser seat comprises soft air bag, holds dirt chamber, dust chamber and one-way piston, wherein soft air bag inside has and only goes out check valve, soft air bag cavity only advances check valve by one and communicates with dust chamber, holds between dirt chamber and the dust chamber and separates with a filter plate, and wiping board embeds in the blackboard eraser seat.

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