CN2133465Y

CN2133465Y - Dust-catched eraser

Info

Publication number: CN2133465Y
Application number: CN 92218041
Authority: CN
Inventors: 王永章
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-06
Filing date: 1992-06-06
Publication date: 1993-05-19
Anticipated expiration: 2002-06-06

Abstract

The utility model discloses a dust-caught blackboard eraser. When the dust-caught blackboard eraser is horizontally moved, the rubbing effect of a retaining ring which is arranged on a driving shaft and made of rubbery materials respectively drives the driving shaft to rotate, two pairs of angle gears drive a dust emission ring and a fan blade to rotate, and negative pressure formed by the rotation of the fan blade achieves a dust suction effect. The dust emission ring has the function that chalk dust brushed by a chalk brush is all the time lift up for many times and a dust cover ensures the chalk dust not to scatter. The utility model thoroughly avoids infringement phenomena from chalk dust to human body and has the advantages of simple structure and convenient process.

Description

Dust-catched eraser

The utility model relates to a kind of blackboard eraser that chalk dust effectively can be adsorbed and reclaims.

At present, on educational front, the important form that numerous teachers impart knowledge and educate people is utilized the blackboard writing on the blackboard exactly, because being still to utilize, China have dust to write chalk, so the teacher is when writing on the blackboard, from blackboard wipe fallen chalk dust except that fly upward fall, quite a few absorbs in teacher's body and health is produced bigger infringement, also once occur some in the art and inhaled dust eraser, mainly be to utilize the adsorbent equipment that a band air cavity function is set in the blackboard eraser, finger was mediated the air cavity modification that is produced when utilization erased the board, and formed local decompression, was expected to reach pick-up performance.Yet because air cavity modification amount can not be excessive in the said mechanism, the negative pressure appearance that is produced is also very faint, so pick-up performance can not be desirable.

The purpose of this utility model be to provide a kind of can along with dust dust fall amount especially along with wipe moving frequently and adjusted in concert dust suction effect, and effectively absorb the ash-collecting blackboard eraser of wiping dust.

The technical solution of the utility model is to realize like this, a kind of driving wheel that rotates around mandrel is set, drive sprocket axle is provided with an annular boss to both sides, boss external diameter edge is furnished with the locating ring of being made by rubber or other equivalent materials, two top ends of driving wheel are provided with a pair of with the modulus bevel gear, by driving wheel top ends Bevel Gear Transmission, it is moving to drive the transhipment of airborne dust loopback, makes the fallen dust of wiping be in the state of flying upward all the time under its effect.Have that two groups of felts or other equivalent materials are made and its natural working face is higher than whitewashing of locating ring working face in the both sides of driving wheel fixture, be provided with one group of groove at drive sprocket axle to the middle part, a side is provided with one group and bores tooth with modulus in the groove, driving wheel rotates by the moving mandrel of this group awl cingulum, the mandrel other end then fixedly is equipped with one group of fan leaf, this group fan leaf rotates with driving wheel in a dust chamber, thereby produce certain negative pressure, the dust that the airborne dust ring is constantly kicked up is adsorbed to indoor, in case indoor dust amasss very then the rotatable bonnet that is connected in the blackboard eraser housing of opening, remove dust.The bonnet center is provided with 100-140 order/cm ²Guard, principal security fan operate as normal for unlikely the leaking of dust that prevent to kick up raises, has soft plastic material or other equivalent materials to make and natural working face is higher than the dust cover that whitewashes the nature working face in blackboard eraser housing front end face press fit arrangement.

Compared with prior art, the utlity model has following advantage: thoroughly having changed in the past, the blackboard eraser dust from flying forms the human body infestation, because the utility model is to adhere to the motion of frictional force drive fan leaf by the moving process driving wheel locating ring of blackboard eraser wiping to form the negative pressure dust suction, so, it is big more to wipe momentum, pick-up performance is obvious more, and simple in structure, processes easy.

Accompanying drawing 1, Fig. 2 are that the generalized section of an embodiment and A are to schematic diagram.Below in conjunction with the embodiment accompanying drawing the utility model is described in further detail.

Support driving wheels 3 by major axis 2 on the blackboard eraser housing 1, driving wheel 3 axial both sides are respectively equipped with annular boss 4, annular boss 4 cylindricals edge is furnished with by rubber or other equivalent materials making locating ring 5, what driving wheel 3 front and back sidepieces were respectively equipped with that two groups of felts or other equivalent materials make whitewashes 6, the dust cover 7 that housing 1 front end face press fit arrangement has soft plastic material or other equivalent materials to make, when the operator according to oppress dust cover 7 like a cork with external force and whitewash the distortion of 6 face heights and and the working face of locating ring 5 directly press and touch blackboard and do the plane and wipe when moving, produce big rubbing action by locating ring 5 and seriticker, driving wheel 3 is rotated, drive with this and to lay respectively at wheel shaft another group bevel gear 9 break-ins of a side in the bevel-gear sett 8 of both side ends and wheel central slot on driving wheel 3 and rotate, making airborne dust ring 10 and fan mandrel 11 drive the fan leaf 13 that is positioned at dust chamber 12 rotates under the power effect that passes over, produce the good result that negative pressure reaches dust suction, have 100-140 order/cm ²The bonnet 15 of guard 14 had both guaranteed fan leaf 13 operate as normal, was convenient to again the too much dust of accumulation is removed, and the utility model other all members except that clear and definite construction material are all made of ABS plastic and other equivalent materials.

Claims

1, a kind of ash-collecting blackboard eraser, by blackboard eraser housing 1, driving wheel 3, airborne dust ring 10, wheel brush 6, dust cover 7, fan leaf 13, dust chamber 12 and bonnet 15 are formed, and it is characterized in that:

(1) driving wheel 3 is bearing on the blackboard eraser housing 1 by major axis 2, and driving shaft 3 axial both sides are provided with annular boss 4, and annular boss 4 cylindricals edge is furnished with locating ring 5; Driving wheel 3 axial both side ends are provided with bevel-gear sett 8, and with airborne dust ring 10 engaged transmission; Driving wheel 3 middle parts are provided with groove, and a side is provided with bevel-gear sett 9 in the groove, and with fan mandrel 11 engaged transmission;

(2) driving wheel 3 front and back sidepieces are respectively equipped with two groups and whitewash 6;

(3) blackboard eraser housing 1 front end face press fit arrangement has dust cover 7;

(4) fan leaf 13 is positioned at dust chamber 12;

(5) blackboard eraser housing 1 rear end face is provided with bonnet 15, and device has guard 14 on the bonnet 15;

2, according to the described ash-collecting blackboard eraser of claim 1, it is characterized in that: whitewash 6 by felt or the making of other equivalent materials, and natural working face is higher than the working face of locating ring 5;

3, according to the described ash-collecting blackboard eraser of claim 1, it is characterized in that: dust cover 7 is made by soft plastic material or other equivalent materials, and its natural working face is higher than and whitewashes 6 natural working faces;

4, according to the described ash-collecting blackboard eraser of claim 1, it is characterized in that: the guard 14 of device on the bonnet 15 is 100-140 order/cm ²

5, according to the described ash-collecting blackboard eraser of claim 1, it is characterized in that: annular boss 4 cylindricals edge is joined locating ring 5, is made by rubber or other equivalent materials;

6, according to the described ash-collecting blackboard eraser of claim 1, it is characterized in that: all members are except that the structure manufacture material that has explicitly called for, and other are all made of ABS plastic and other equivalent materials.