CN2659704Y - Dust-proof eraser - Google Patents

Abstract

The utility model discloses a dust removal blackboard eraser which consists of a housing, an electric motor, a fan fixed on the shaft of the electric motor, a dust collection bag, and a felt type eraser. The utility model is characterized in that the fan is a turbofan; the centre of the fan aims at the upper part of the dust collection bag; the blackboard eraser is fixed on the skirt base below the lower part of the housing via a dismountable structure; a current channel is arranged between the blackboard eraser and the four sides inside the skirt base; and a power switch and mains connections are arranged on the housing. The utility model uses the stabilized voltage supply with sufficient electric quantity and high electrical motor power. The prototype experiment shows that the utility model can inhaler dust produced from erasing the blackboard into the dust collection bag completely, thereby having good dust suction effect.

Description

Dust-removing blackboard eraser

Technical field

The utility model relates to electric blackboard eraser

Background technology

The school of our each age level still gives lessons based on blackboard and chalk in teaching process at present.The blackboard eraser of existing use can't be handled break flour, when erasing the board, break flour dances in the air, the people who erases the board, hand and clothes all speckle with or the upward dust that falls, also to suck simultaneously and spread in airborne dust, teacher and student place oneself in the midst of in the environment of dust pollution all day, to healthy generation harmful effect.Domestic and international for this reason many R﹠D institutions and individual carry out the trial of a lot of novel blackboard erasers, and tens blackboard eraser patent applications have been arranged simultaneously.These patent applications can be divided into two classes according to operation principle, and the one, electrostatic precipitation formula blackboard eraser, the 2nd, ash-collecting blackboard eraser.For electrostatic dust-removing blackboard eraser, the electrode characteristic of break flour and the difference of moisture content all directly influence the electrode pick-up performance, and its voltage configuration relation is difficult to grasp.Simultaneously the high voltage during electrostatic precipitation is difficult to apply to student's personal safety big problem just; The principle of ash-collecting blackboard eraser is that motor-driven fan produces negative pressure, utilizes supplemental air flow to carry break flour secretly, carries out break flour by dust arrester and collects and handle.Its power source can adopt two kinds of battery and voltage-stabilized power supplies, limited and the structural configuration two aspect reasons owing to the capacitance of dry cell, power is obviously not enough, and dust removing effects is very poor: source of stable pressure is feasible as power source, but the reasonable coupling of motor and fan is a key of success.Therefore, because a variety of causes, aforesaid two class blackboard erasers do not drop into commercial operations even to this day yet, and use is not seen by school yet.

Summary of the invention

It is power source with the voltage-stabilized power supply that the purpose of this utility model is to provide a kind of, the dust-removing blackboard eraser of good dedusting effect.As shown in drawings, the utility model comprises housing 4, motor 1, is fixed on fan 2, dust bag 3, felt formula blackboard eraser 6 on the motor shaft, there is steam vent the housing top, transversely arrange motor, fan, dust bag successively along housing, fan of the present utility model is wheeled fan, the top of the intermediate alignment dust bag of fan, blackboard eraser is fixed on the skirt base 8 of lower part of frame by demountable structure, blackboard eraser and skirt base have gas channel 9 between inboard four limits, and power switch 7 and power connection 6 are arranged on housing.Behind power connection, the rotation of driven by motor fan produces negative pressure in the blackboard eraser housing, replenishes air the break flour that blackboard eraser produces is sucked in the dust bag by gas channel, and pure air is discharged by fan.The utility model adopts voltage-stabilized power supply, the electric weight abundance, and power of motor is bigger, shows through prototype test: this machine break flour when erasing the board all is inhaled in the dust bag, and pick-up performance is good.Only need clear up a dust bag and just can reuse every day.Compare with ordinary blackboard eraser, the break flour amount of blackboard groove obviously reduces, and the staff that erases the board, clothes all do not have break flour to be stained with, and does not also have the dust that suspends simultaneously in the air.Improve classroom environment greatly, be of value to academics and students's health.

Description of drawings

Fig. 1 is the utility model front view;

Fig. 2 is the utility model vertical view;

Fig. 3 is wheeled fan front view;

Fig. 4 is wheeled fan left view.

The specific embodiment

Housing adopts ABS plastic to make, and is long 152 millimeters, wide 62 millimeters, high 71 millimeters.Power of motor 20W, wheeled fan is made by ABS plastic, and 50 millimeters of diameters are wide 11 millimeters, uniform 12 blades on the wheeled fan.The flexible clamp in wiping board two ends makes wiping board be fixed on skirt base inboard, is convenient to the dismounting of blackboard eraser simultaneously.Gas channel between blackboard eraser and the skirt base inboard is loose 3 millimeters.Power line adopts spiral, is convenient to stretch and retraction, and power connection adopts the quartzy joint design on the telephone set.

Claims (1)

1, dust-removing blackboard eraser, comprise housing, motor, be fixed on fan, dust bag, felt formula blackboard eraser on the motor shaft, there is steam vent the housing top, transversely arrange motor, fan, dust bag successively along housing, it is characterized in that fan is wheeled fan, the top of the intermediate alignment dust bag of fan, blackboard eraser is fixed on the skirt base of lower part of frame by demountable structure, blackboard eraser and skirt base have gas channel between inboard four limits, and power switch and power connection are arranged on housing.

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