CN2312134Y

CN2312134Y - Dust-suction type blackboard eraser

Info

Publication number: CN2312134Y
Application number: CN 97242782
Authority: CN
Inventors: 黄启慧; 刘佩文
Original assignee: Yingtong Applied Tech Research Inst Shanghai Jiaotong Univ
Current assignee: Yingtong Applied Tech Research Inst Shanghai Jiaotong Univ
Priority date: 1997-12-01
Filing date: 1997-12-01
Publication date: 1999-03-31
Anticipated expiration: 2007-12-01

Abstract

The utility model relates to a dust-suction type blackboard eraser for classroom teaching. The utility model is composed of an eraser seat and an eraser board. A supporting seat is arranged on the eraser seat, the bottom face of the eraser board is provided with a corresponding supporting pin, the supporting seat is directly connected with the supporting pin or is connected with the supporting pin by a height adjusting mechanism, and the blackboard eraser seat is caused to be integrated with the eraser board. The face of the eraser board is provided with a groove and a strip-shaped felt strip which are arranged alternately, the space of the lower part of the eraser seat is used as a dust containing box, and one side of the dust containing box is provided with an openable back cover. Most erased chalk dust can be sucked in the dust containing box along the groove while the utility model is in use, and thus flying dust is effectively prevented. The utility model has the advantages of simple structure, low manufacture cost and long service life.

Description

The dust-absorbing blackboard eraser

The utility model relates to a kind of dust-absorbing blackboard eraser, and is used for classroom instruction, belongs to eraser technical field in the culture and education office appliance.

Now used blackboard eraser is to become with the monoblock felt on the classroom, removes during use the part chalk dust is inhaled in the felt, and most chalk dusts all fly upward in air, pollute the classroom air, endanger teachers and students' health.Once had the electric blackboard eraser of similar dust catcher function to emerge, but because complex structure, cost height, effect is also not obvious, is not adopted widely and pay close attention to.Reduce chalk dust to the pollution of environment and to the harm of human body, being that educational circles are long-term urgently wishes to solve and unsolved problem.

The purpose of this utility model be at the existing existing defective of blackboard eraser and people to the technical need of blackboard eraser, provide a kind of simple in structure, it is effective to inhale ash; the novel blackboard eraser of long service life; make it in use, can reduce the chalk dust that flies upward in the classroom, the protection people's is healthy.

For realizing such goal of the invention, the dust-absorbing blackboard eraser concrete structure of inventor's design is as follows: blackboard eraser is formed by wiping seat and wiping board two parts, be equipped with supporting base on the blackboard eraser seat, there is corresponding fulcrum post the wiping board bottom surface, supporting base can directly be connected or be connected by governor motion with fulcrum post, makes blackboard eraser seat and wiping board synthetic whole.Supporting base can adopt 3, is triangularly arranged on the wiping seat, and certainly, the quantity of supporting base and fulcrum post also can be one or two, as long as can make blackboard eraser seat and firmly safe lumping together of wiping board.Be spaced some grooves and bar shaped felt rug on the wiping board, wiped the bottom of seat and leave the space, an openable bonnet has been housed in a side of ash box as ash box.In use, the bar shaped felt rug on the wiping board is cleaned the letter written with chalk on the blackboard, and the chalk dust under wiping sucks in the ash box along groove, opens bonnet, the chalk dust in the promptly pourable ash box.Suck chalk dust in the felt rug for a part, beat gently again in the blackboard eraser seat of also the wiping board upset can being packed into, enter ash box again after making chalk dust fall into the blackboard eraser seat.Bar shaped felt rug and groove number on the wiping board face are the amount doesn't matter, generally are advisable with 3 felt rugs and 4 grooves.

Wiping board of the present utility model adopts groove and bar shaped felt rug to be spaced structure, and most chalk dusts are sucked in the box, effectively prevents dust from flying; Owing to be not to rely on felt rug to inhale ash, therefore can select compactness height, felt rug that wearability is good for use, increase the service life; Felt rug after simultaneously the utility model also can will wear and tear by governor motion raises, and makes blackboard eraser can continue use, from and can improve the utilization rate of blackboard eraser greatly; Because what the utility model adopted is to wipe seat and two independent structures of wiping board, when the felt rug of blackboard eraser can not use because of wearing and tearing, become a complete blackboard eraser again as long as change wiping board, therefore, its use cost is well below existing blackboard eraser.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a front schematic view of the present utility model.

Fig. 2 is the side schematic view after the utility model is cut open from positive centre.

In Fig. 1, the front of blackboard wiping board has been spaced 3 felt rugs 3 and 4 grooves 4, and ash box 5 is in the bottom of blackboard eraser.

In Fig. 2 as seen, the dust-absorbing blackboard eraser is formed by wiping seat 1 and wiping board 2, wiping 3 supporting bases 7 that have been triangularly arranged on the seat 1, there are corresponding 3 fulcrum posts 9 corresponding supporting base 7 positions on wiping board 2, adopt adjustment screw 8 as height adjustment mechanism, the internal thread engagement of the external screw thread of adjustment screw 8 and supporting base 7, the fulcrum post 9 on the wiping board 2 inserts the endoporus of adjustment screw 8, will wipe seat 1 and wiping board 2 thus and be linked to be a complete blackboard eraser.If change the screw-in depth of adjustment screw 8, can regulate the height that bar shaped felt rug 3 leaves blackboard eraser seat 1 plane.The space of wiping seat 1 bottom is as ash box 5, and there is a bonnet 6 at its back side, can open and pour out chalk dust.Bar shaped felt rug 3 on 2 of the wiping boards exceeds the ash box 5 of wiping seat 1 bottom, uses so that wipe ash.

The utility model in use, ash box 5 is in following position, when the blackboard eraser move left and right, bar shaped felt rug 3 is cleaned blackboard, chalk dust under wiping sucks in the ash box 5 along groove 4, because bar shaped felt rug 3 adopts the tight type felt rug, felt rug is difficult for inhaling ash, and the dust stratification amount is much smaller than the blackboard eraser of present use.For the dust stratification in the bar shaped felt rug 3, on the blackboard eraser seat 1 of wiping board 2 upset can being packed into and rap, the dust stratification in the bar shaped felt rug 3 just falls into the ash box 5 of blackboard eraser seat 1 bottom, opens bonnet 6 and chalk dust can be outwelled with complete.

In an embodiment of the present utility model, there are 3 felt rugs 3 and 4 grooves 4 to be spaced on 2 of the wiping boards, wiping 3 supporting bases 7 that have been triangularly arranged on the seat 1, on corresponding position, wiping board 2 bottom surfaces, 3 fulcrum posts 9 are arranged, height adjustment mechanism adopts adjustment screw 8, supporting base 7 links to each other by adjustment screw 8 with fulcrum post 9, and the lower space of wiping seat 1 is an ash box 5, and there is a bonnet 6 at its back.

When the utility model used, the chalk dust overwhelming majority under wiping can suck in the ash box along groove, has reduced the dust that flies upward in the air effectively, owing to can select the compactness felt rug for use, was difficult for inhaling ash, made blackboard eraser keep cleaner; Because the felt rug wearability is good, the back that also can raise by the felt rug of governor motion wearing and tearing continues to use the service life of having improved blackboard eraser greatly again.The utility model is simple in structure, and low cost of manufacture is convenient to promote the use of.

Claims

1, a kind of dust-absorbing blackboard eraser, form by wiping seat (1) and wiping board (2) two parts, it is characterized in that wiping on the seat (1) and be equipped with supporting base (7), there is corresponding fulcrum post (9) wiping board (2) bottom surface, supporting base (7) links to each other with fulcrum post (9) to make and wipes seat (1) and the synthetic integral body of wiping board (2), with every arranging bar shaped felt rug (3) and groove (4), ash box (5) is arranged at a bottom of wiping (1) on wiping board (2) face, in a side of ash box (5) an openable bonnet (6) is housed.

2, a kind of as the said dust-absorbing blackboard eraser of claim 1, it is characterized in that spaced bar shaped felt rug (3) is 3 on wiping board (2) face, groove (4) is 4.

3, a kind of as the said dust-absorbing blackboard eraser of claim 1, it is characterized in that supporting base (7) is connected with fulcrum post (9) by adjustment screw (8), the internal thread engagement of the external screw thread of adjustment screw (8) and supporting base (7), fulcrum post (9) inserts the endoporus of adjustment screw (8).