CN2243399Y - Dustless chalk eraser - Google Patents

Abstract

The utility model discloses a dustless chalk eraser. The middle part of a hexahedral erasing box cavity with an opening on one side is fixed with strip-shaped erasing materials in vertical arrangement. The lower part of the erasing box is provided with a dust collecting cavity, and both lateral faces of the upper part of the erasing box are respectively provided with an air inlet. A V-shaped guide plate which guides the intake air to move downward is arranged in the erasing box at the position corresponding to the air inlets, so that the air flow entering from the air inlets brings the chalk dust erased off by the erasing materials to the dust collecting cavity. With the dust collecting rate of more than 90 percent, the utility model can eliminate the phenomenon that chalk dust flies at the time of erasing blackboards, and has simple structure and no need for additional energy source.

Description

Dust-free chalk is wiped

The utility model relates to a kind of device of wiping chalk trace on the blackboard.

Present widely used chalkboard eraser be on flat board directly fixing brown felt etc. wipe material, it had not both had dust collect plant, was not easy to again change wipe material, chalk dust flies upward during use, both contaminated environment is damaged operating personnel's health again easily.For this reason, application such as No. 89205663.0, Chinese patent has proposed a kind of improved plan: the dust catcher wiping material and miniature cocurrent electromotor and drive is installed in hexahedron is wiped box, will be wiped the chalk dust of expecting under the wiping and be collected in the dust-collecting cavity.But the complex structure of this dust suction chalkboard eraser, battery consumption is fast, the use cost height, effect also may not be certain.

Task of the present utility model be to provide a kind of simple in structure, do not need additional source of energy, pick-up performance dust-free chalk is preferably wiped.

Task of the present utility model is achieved in that wiping the bar shaped that the middle part setting is longitudinally arranged in the box at six shape cavitys of an opening of five face closures wipes feed collet, wipe and clip equal with opening surface or slightly outstanding bar shaped wiping material on the feed collet, dust-collecting cavity is arranged at the bottom of wiping box, the two sides, top of wiping box respectively have an air inlet, wipe in the box place relative with two air inlets and are fixed with one and guide air inlet into descending guide plate.

When being adjacent to chalkboard eraser of the present utility model that left and right sides reciprocally swinging is wiped chalk trace on upright blackboard, air can enter to wipe in the box and by guide plate from the air inlet of wiping box top automatically and guide downwards, wipe in the suspension chalk dust of blackboard is brought the dust-collecting cavity of wiping the box bottom into thereby quilt is wiped material, and those oarse-grained chalk dusts can directly fall in the dust-collecting cavity owing to deadweight.Owing to wipe five face closures of box, only be adjacent to an opening of blackboard, thereby wiped chalk dust down and can't be flown out outside the wiping box, dust collection efficiency reaches more than 90%, eliminated the phenomenon of dust from flying, realized cleaning of environment, and simple in structure, need not the effect that additional source of energy can reach automatic dust collection.

Be elaborated below in conjunction with embodiment and accompanying drawing.

Fig. 1 is a front view of the present utility model, and Fig. 2 is the cutaway view along A-A.

With reference to accompanying drawing, six shape cavitys are wiped the forward, central part opening of boxes 1, are provided with the bar shaped elasticity of longitudinally arranging in this chamber, place and wipe feed collet 2, wherein accompany the wiping material 3 that material such as brown felt is made, change wipe expect very convenient.Dust-collecting cavity 4 is formed naturally at the bottom of wiping box 1, at the place, two sides, top of wiping box an air inlet 5 is arranged respectively, there is the slope guide plate 6 of a V-arrangement in the place relative with air inlet 5 in the box chamber of wiping box top, it can will guide into descending from air inlet 5 leaked-in airs, flow through the space of wiping between the material 3, through dust-collecting cavity, thus the chalk dust that will be wiped under the material wiping is brought in the dust-collecting cavity.

Fit to such an extent that closely do not cause chalk dust to wipe the box outside in order to prevent opening surface and the blackboard of wiping box 1 from draining between opening surface and the blackboard, also being provided with one at the place, dust-collecting cavity 4 upper edges of wiping box 1 opening surface can be around the Antileaking plate 7 of horizontal axle center rotation, the upper edge of this Antileaking plate is parallel with opening surface and slightly exceed plane of the opening, dust-collecting cavity is stretched in its lower edge, introduces in the dust-collecting cavity from the chalk dust that opening surface and seriticker slit source are walked so that will attempt.Antileaking plate 7 can be pulled outside commentaries on classics with torsion spring 8, makes its upper edge can be adjacent to blackboard surface, also can be by the position in axle center suitably be set, thus make the Antileaking plate upper edge be adjacent to blackboard surface by the torsional interaction of its center of gravity.

Also can be in the back of dust-collecting cavity along oblique dividing plate 9 of crosswise fixed, and make it and dust-collecting cavity bottom surface that certain clearance 10 be arranged, and on the wiping box backboard behind the dividing plate 9, make venthole 11, enter and the air of wiping material 3 and dust-collecting cavity 4 of flowing through is discharged smoothly from venthole 11 from air inlet 5 so that allow.Because there is certain distance the position of venthole 11 apart from the dust-collecting cavity bottom surface, thereby air can not taken dust out of.

The bottom surface of dust-collecting cavity 4 also can be made into the form of opening, inserts in this opening with U-shaped shrouding 12 then the bottom surface is sealed.This helps from wiping the box bottom chalk dust in the dust-collecting cavity being drawn off.

Claims (4)

1, a kind of dust-free chalk is wiped, the middle part of wiping in the box (1) at six shape cavitys of an opening longitudinally is fixed with bar shaped wiping feed collet (2), accompany in the folder and wipe material (3), dust-collecting cavity (4) is arranged at the bottom of wiping box (1), it is characterized in that respectively there is an air inlet (5) two sides, top of wiping box (1), wipe in the box (1) place relative and be fixed with one and guide air inlet into descending V-arrangement guide plate (5) with two air inlets (5).

2, wipe by the described dust-free chalk of claim 1, it is characterized in that: also have at the opening surface place of wiping box (1) dust-collecting cavity (4) one can be around transverse minor axis rotation and its upper edge parallel with opening surface and exceed the Antileaking plate (7) of plane of the opening.

3, wipe by claim 1 or 2 described dust-free chalks, it is characterized in that: the dividing plate (7) of a lower edge and dust-collecting cavity (3) bottom surface gapped (10) is also arranged along crosswise fixed in the dust-collecting cavity (4) of wiping box (1), have venthole (8) on the backboard of dust-collecting cavity (4).

4, wipe by the described dust-free chalk of claim 3, it is characterized in that: dust-collecting cavity (3) bottom surface is opening also, inserts in the opening with U-shaped shrouding (12) bottom surface is sealed.

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