CN2345371Y

CN2345371Y - Automatic dust-absorption eraser

Info

Publication number: CN2345371Y
Application number: CN 98227907
Authority: CN
Inventors: 李树喜; 刘昔风
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-23
Filing date: 1998-09-23
Publication date: 1999-10-27
Anticipated expiration: 2008-09-23

Abstract

The utility model discloses an automatic dust-absorption blackboard eraser which is composed of an erasing strip made of flexible materials, an erasing board box for fixing the erasing strip, an exhaust blower, a power supply, a dust depositing box and a filtering air outlet, wherein the exhaust blower and the power supply are fixed in the erasing board box, the filtering air outlet is positioned on the side wall of the erasing board box, the erasing strip is arranged next to an air inlet of the exhaust blower, and the dust depositing box is positioned in front of the filtering air outlet. The automatic dust-absorption blackboard eraser of the utility model can erase chalk marks on a blackboard and can simultaneously absorb the erased chalk dust into the erasing board box in time so that the utility model has the function of preventing the chalk dust from polluting environment, is favorable for ensuring the physical and the mental health of teachers and students and is suitable for being popularized and applied in wide primary and secondary schools using chalks in teaching.

Description

Automatic dust-absorption eraser

The utility model relates to a kind of blackboard cleaning device, and especially a kind of blackboard eraser belongs to the teaching aid technical field.

Chalk is the main writing implement of classroom instruction for a long time.Along with rapid economic development, though the minority school of China developed regions has adopted dustless teaching writing instrument, even has realized audio-visual education programmeization, most schools, the middle and primary schools in especially vast rural area still from not the chalk teaching.Existing blackboard eraser usually by soft wiping face and fixedly the wiping board box of wiping face form.The problem that in use has dust polluting environment is all the time brought harm for the healthy of numerous teachers and students, even is caused occupational disease.

The purpose of this utility model is: the problem that exists in using at above-mentioned existing blackboard eraser proposes a kind ofly can avoid the automatic dust-absorption eraser of dust polluting environment when cleaning off a blackboard.

In order to achieve the above object, automatic dust-absorption eraser of the present utility model comprises wiping bar and the fixing wiping board box of wiping bar that soft material is made, also comprise air exhauster, power supply, dust deposited case and filter out the air port, described air exhauster and power supply are fixed in the wiping board box, filter out the air port and be positioned at wiping board box sidewall, described wiping bar is installed near the air exhauster air inlet, before described dust deposited case is positioned at and filters out the air port.

When using automatic dust-absorption eraser, wipe bar and can wipe chalk trace on the blackboard as the wiping face of ordinary blackboard eraser, power supply in the wiping board box drives air exhauster and produces negative pressure simultaneously, in time be drawn onto in the wiping board box wiping the chalk dust that falls, and be filtered at the air outlet place and hold back, accumulate in the dust deposited case, thereby avoid dust from flying.This shows that automatic dust-absorption eraser of the present utility model has the function that prevents dust polluting environment, help guaranteeing teachers and students' physical and mental health, be adapted at using the vast middle and primary schools of chalk teaching to promote the use.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is Figure 1A-A profile.

Fig. 3 is a schematic perspective view of wiping bar among Fig. 1.

Automatic dust-absorption eraser among Fig. 1 and Fig. 2 is mainly by wiping bar 3, wiping board box 1, air exhauster, power supply 8, dust deposited case 4, filtering out air port 7 and form, micro machine 5 rear ends of air exhauster are fixed in the wiping board box by holder 6, front end is installed the centrifugal wing wheel 2 of injection molded, power supply 8 is No. 5 batteries of two joints, be fixed on the right back portion of wiping board box 1, filtering out air port 7 is positioned on the right side wall of wiping board box 1, wipe bar 3 and be installed in air exhauster air inlet front, before dust deposited case 4 was positioned at and filters out air port 7, there was the cover plate 9 that can open and close its underpart.In addition, the installation position of wiping bar 3 is dovetail shaped as shown in Figure 3, can be inserted in the wiping board box 1 associated dovetail groove.

The volume and the ordinary blackboard eraser of this automatic dust-absorption eraser are similar, during use, connect battery, micro machine 5 drives centrifugal wing wheel 2, makes air exhauster produce negative pressure, wipes as the wiping face of ordinary blackboard eraser on the blackboard in the chalk trace wiping bar 3 like this, in time be drawn onto in the wiping board box 1 wiping the chalk dust that falls, and be filtered at air outlet 7 places and hold back, accumulate in the dust deposited case 4, thereby avoid dust from flying.A period of time to be used, when accumulated powder is more in the dust deposited case 4, open cover plate 9, clean out dust and just can continue to use, very convenient.In addition, have the dovetail structure, so an easy disassembling, thereby bring convenience for the cleaning of air exhauster and the replacing of wiping after bar 3 self weares and teares owing to wipe bar 3.In a word, the automatic dust-absorption eraser of present embodiment have structure small and exquisite, use freely, clear up remarkable advantage easily.

Claims

1. automatic dust-absorption eraser, comprise wiping bar and the fixing wiping board box of wiping bar that soft material is made, it is characterized in that: also comprise air exhauster, power supply, dust deposited case and filter out the air port, described air exhauster and power supply are fixed in the wiping board box, filter out the air port and be positioned at wiping board box sidewall, described wiping bar is installed near the air exhauster air inlet, before described dust deposited case is positioned at and filters out the air port.

2. automatic dust-absorption eraser according to claim 1 is characterized in that: the cover plate that can open and close is arranged at the bottom of described dust deposited case.

3. automatic dust-absorption eraser according to claim 1 is characterized in that: the installation position of described wiping bar is dovetail shaped, can be inserted in the associated dovetail groove of wiping board box.