CN2108633U - Eraser with collecting dust function - Google Patents
Eraser with collecting dust function Download PDFInfo
- Publication number
- CN2108633U CN2108633U CN 91210086 CN91210086U CN2108633U CN 2108633 U CN2108633 U CN 2108633U CN 91210086 CN91210086 CN 91210086 CN 91210086 U CN91210086 U CN 91210086U CN 2108633 U CN2108633 U CN 2108633U
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- China
- Prior art keywords
- dust
- wiping
- blackboard eraser
- collection function
- dust collection
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a blackboard eraser with a collecting dust function, which relates to a simple and sanitary teaching article, comprising a roller-shaped erasing body which is used for erasing chalk writings, a friction wheel which is used for driving the erasing body to rotate, a variable-speed driving mechanism, a casing body and a front cover, wherein, the casing body and the front cover are used for supporting, positioning and providing an erasing body chamber, a driving chamber, a dust collecting bin and a dust scraping piece. The erasing body material continuously erases writings; the erasing body carries the writing chalk dust to divert into the casing body; the erasing and the collecting processes of the chalk dust on the erasing body are simultaneously carried out. The utility model fundamentally solves the problems that chalk dust is piled up and scattered on the front side of an ordinary blackboard eraser and an erased board surface has floating dust.
Description
But the utility model is a kind of blackboard eraser of automatic dust collection, and does not need electric energy or other energy, belongs to the realia of simple and easy health.
Existing blackboard eraser does not have dust arrester mostly, and dust disperses during use, influences the health of Faculty and Students.Existing electric dust absorption blackboard eraser, then because big, deal weight of volume, complex structure, cost height, reason such as fragile, and be not easy to popularization.
This is novel to have overcome the above-mentioned shortcoming of existing blackboard eraser, provide that a kind of to wipe performance good, the dust catching efficiency height, and the light durable instrument that wipes, its wipe and control of dust process are carried out simultaneously, fundamentally solved the problem that floating dust is arranged on the blackboard surface that common blackboard eraser front side dust piles up, is scattered, nuzzles up, made to wipe performance and improve.It has solved the worries that teacher's dirt dyes whole body effectively, has solved the classroom problem of dust pollution for a long time.Its use is equally convenient with common blackboard eraser, and simple in structure, and is with low cost, is convenient to produce, and therefore is fit to all kinds of schools and popularizes.
This novel basic thought of invention is directly to utilize in the blackboard wiping process hand to brandish the merit that blackboard eraser is done, to wipe body and contact blackboard wiping writing continuously, wiping body carries dust and leaves blackboard, wipe the process of the removing and the collection of dust on the body, carry out simultaneously, provide manually wiping of a kind of mechanical type, dust collect plant.It comprises: (1) wipes body it is for adhering to the round-shaped body that wipes of abrasion resistant fibrous felt, flannelette or other materials of dust by the surface; (2) friction driving mechanisms it be by the surface for bigger coefficient of friction to be arranged with blackboard surface, have the friction pulley that the material of bigger elastic deformation rigidity constitutes; (3) variable transmission mechanism it be by wiping the body centre rotational axis, friction pulley centre rotational axis, and realize that the gear pair of between centers speed change or other transmission systems constitute; (4) be used for supporting, locate and provide and wipe body chamber Transmission Room, the housing and the protecgulum of dust compartment and dedusting part.In the wiping process, friction pulley is pure rolling on blackboard, wipes body by variable transmission mechanism driven roller shape and rotates around the axle center of its translation.Slide with the relative blackboard of body of wiping of blackboard contact position, wipe writing; Because the roller shape is wiped body around the rotation from axle, wipe the body material and contact blackboard removing writing continuously simultaneously, carry the writing dust and transfer in the housing, and, the dust of wiping on the body is fallen clearly, make under the gravity effect, fall into following dust compartment by the dedusting part of putting.
Below further analyze that the utility model moves in wiping process, the relation between the stressed and friction horsepower.
If the frictional force that normal each roller shape of wiping is wiped between body and blackboard surface is F, the coefficient of sliding friction of wiping between body and the blackboard surface is f1, confficient of static friction between friction pulley and blackboard surface is f2, the gearratio of variable transmission mechanism is i, the speed of brandishing blackboard eraser is v, it is R that the roller shape is wiped the body radius, ignores the friction loss at axle system and dust blowing part place, then has when friction pulley and roller shape are wiped the body direction of rotation:
It is v * i * R that the roller shape is wiped body rotational angular velocity relative and its axle center;
With the wiping speed of wiping body of blackboard contact position be v+v * i;
The side force that hand is added on the blackboard eraser is F+F * i;
The normal pressure perpendicular to the blackboard surface direction that hand is added on the blackboard eraser is F/f1+F * i/f2;
The friction horsepower of blackboard eraser is (F+F * i) * v=F * v+F * i * v;
Wherein F * i * v wipes the body friction horsepower for what the existence owing to friction pulley increased.
The friction horsepower of frictional force on the friction pulley and increase is all in direct ratio with gearratio i as can be seen.The roller shape is wiped body and is not rotated basically when i=0, is equivalent to common blackboard eraser wiping, and friction pulley does not need frictional force; When i ≠ 0, the friction pulley place needs stiction F*i come the driven roller shape to wipe body to rotate, to finish wiping writing and dust from wiping the removing on the body, also increased wiping power simultaneously.When variable transmission mechanism was one-level gear pair or halved belt transmission (wheel rope mechanism), the roller shape was wiped body and friction pulley direction of rotation, and by changing gear ratio or pulley diameters ratio, can obtain different gearratio i.
When variable transmission mechanism is normally band transmission, wipe body and friction pulley rotates in the same way, as long as gearratio i ≠ 1, then the roller shape is wiped not pure rolling on blackboard of body, wipe body with speed (1-i) * v wiping writing, at this moment the required stiction of friction pulley still is F * i, but the side force of frictional work and hand is reduced to F * (1-i) * v and (1-i) * F respectively.
Friction pulley provides enough frictional force F * i, key is confficient of static friction f2 and the normal pressure between it and blackboard surface, so the friction pulley surface will have the material of bigger coefficient of friction to constitute with blackboard surface with rubber etc., the normal pressure above the friction pulley is then by the control friction pulley and the roller shape is wiped the poor of body radius and the factors such as material thickness, compression rigidity that wipe solve.
The roller shape is wiped the rotation direction of body and gearratio i and has been determined the driven roller shape to wipe body to rotate the side force of needed friction pulley stiction, hand and the size of wiping power.According to friction pulley and wipe the coefficient of friction between body and the blackboard surface and hold firmly custom different of blackboard eraser, can select different gearratios for use.
Compare with ordinary blackboard eraser, because the area that contacts simultaneously with blackboard significantly reduces, the use of this novel blackboard eraser needs less side force and normal pressure, use more light, because the rotation that the roller shape is wiped body, the dustless body material blackboard wiping writing continuously of wiping also makes the speed of wiping and effectively wipes power to increase simultaneously, improves wiping word effect.Because the blackboard eraser side and and blackboard surface between not there being dust to pile up, do not have floating dust on the blackboard surface that nuzzles up.
Now in conjunction with this novel a kind of scheme of Figure of description 1 explanation.Figure of description 1 is the shaft side decomposition figure of this novel a kind of design.Wherein (1) is protecgulum; (2) be that the roller shape is wiped body; (3) be driven gear; (4) be driving gear; (5) be friction pulley; (6) be housing; (7) be the dedusting part; (8) be portable plate; (9) be dust compartment; (10) be the dust compartment shoot door.
In wiping process, friction pulley (5) and roller shape are wiped body (2), and all some exposes protecgulum, contact with the blackboard compression, compare with the soft body material of wiping, owing between friction pulley (5) and the blackboard very high coefficient of friction and normal pressure are arranged, friction pulley (5) is made pure rolling on the plate face, and come the driven roller shape to wipe body (2) by gear pair (3) (4) and rotate, wipe the process of word in other words, be equivalent to the word retrography is wiped on the outer surface of body (2) to the roller shape, to wipe body absorption saturated thereby do not have, dust is piled up and is wiped the body front side, it is aerial to be scattered, with the problem that floating dust is arranged on the blackboard surface.
The body of wiping that carries chalk writing turns in protecgulum (1) and the housing (6) continuously, by dedusting parts (7) such as built-in hairbrush bar or elasticity gussets the writing dust is fallen clearly, falls into dust compartment (9) through unidirectional portable plate (8) under the gravity effect.Unidirectional portable plate (8) be located at dedusting part (7) below, during wiping, under the effect of gravity, open certain angle, can fall into dust compartment (9) for dust.The horizontal side of blackboard eraser or be not intended to put upside down when using, portable plate is closed, dust can not flow backwards, dust compartment open the door (10) be located on the protecgulum, can make things convenient for deashing.
Two rollers of drive are strong respectively wipes body for two friction pulleys up and down, can guarantee that friction pulley can have different rotating speeds up and down when the wiping arching trajectory, and power train can not interfere with each other yet.
Adopt hermetically-sealed construction, protecgulum and housing will be wiped body and wrap, and only open two rectangular windows at protecgulum, make expose wipe body and the plate face compresses the wiping writing.Then can accomplish complete control of dust as be stained with the sealing of rubber bar on window four limits.
Protecgulum (1), housing (6), gear pair (4) (3) and friction pulley (5) are injection molded; The roller shape is wiped body (2) and is made of garden wooden stick or the thick woollen blanket tube of the about 5mm of plastic tube overcoat; It is that diameter is that the reinforcing bar of 4mm is cut into that the roller shape is wiped body (2) and driven gear shaft, the roller shape is wiped body and driven gear is fixed on it by the interference tight fit.
Dedusting part (7) is additional hairbrush bar, also can be directly outpour on housing thin, elasticity gusset preferably.
Portable plate (8) is that the part of dust compartment (9) upper spacer connects with dividing plate by rubber strip, makes portable plate open certain angle under the gravity effect, can close by rubber strip elasticity when the blackboard eraser traverse again.
Obviously, Fig. 1 is not that this uses novel unique feasible embodiment.The roller shape is wiped body can be for one or more, and variable transmission mechanism can be band transmission (wheel rope drive) or other the type of belt drive of having considered the tensioning measure: the position of dust compartment can housing below; Portable plate can replace with the dust path of wiping the complications between body chamber and dust compartment, and dust slipped into path by inertia during the mistake of brandishing blackboard eraser became, and can adverse current when blackboard eraser is inverted; Gear, friction pulley and housing, protecgulum etc. also can adopt other the material that easily wipes Yi Qingchen such as flannelette.
Claims (8)
1, a kind of blackboard eraser with dust collection function is characterized in that it comprises: (1) is used for the garden roller shape of wiping chalk writing and wipes body; (2) be used to drive the friction pulley of wiping the body rotation; (3) variable transmission mechanism; (4) be used to support, locate and housing and the protecgulum of wiping body chamber, Transmission Room, dust compartment and dedusting part be provided.
2, according to claims 1 described blackboard eraser with dust collection function, it is characterized in that the surface that wipes that garden roller shape wipes body is by having certain thickness and flexible flannelette, the high-abrasive material that tapetum fibrosum or other easily wipe Yi Qingchen constitutes.
3,, it is characterized in that the friction pulley surface is to be made of the material that rubber or other and blackboard surface have high friction coefficient and have certain elastic deformation rigidity according to claims 1 described blackboard eraser with dust collection function.
4,, it is characterized in that its variable transmission mechanism is that gear pair or other are any regular script material with the blackboard surface contact position is both rotated around its axle center, again the mechanism of blackboard surface translation relatively according to claims 1 described blackboard eraser with dust collection function.
5, according to claims 1 described blackboard eraser with dust collection function, it is characterized in that each roller shape wipe body only by the friction pulley of upside or downside one side, by one group of transmission mechanism drive.
6, according to claims 1 described blackboard eraser with dust collection function, it is characterized in that housing and protecgulum and on dividing plate constituted Transmission Room, wiped the body chamber, dust compartment with for wiping the window that body and friction pulley contact with blackboard surface.
7, according to claims 1 described blackboard eraser with dust collection function, it is characterized in that the dedusting part is the perpendicular hairbrush bar of putting, its length is suitable with the length of wiping body, bristle with wipe that body is vertical to be contacted.
8, according to claims 1 described blackboard eraser with dust collection function, it is characterized in that tortuous dust path being set wiping between body chamber and the dust compartment, it is converse by being difficult for to make the easy backup plate of dust wipe the inertia of brandishing, or the unidirectional movable doorboard that can open certain angle under the gravity effect is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210086 CN2108633U (en) | 1991-01-24 | 1991-01-24 | Eraser with collecting dust function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91210086 CN2108633U (en) | 1991-01-24 | 1991-01-24 | Eraser with collecting dust function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2108633U true CN2108633U (en) | 1992-07-01 |
Family
ID=4918926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91210086 Granted CN2108633U (en) | 1991-01-24 | 1991-01-24 | Eraser with collecting dust function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2108633U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984933A (en) * | 2017-12-23 | 2018-05-04 | 王昊辰 | A kind of application method of portable environmental-protection blackboard eraser |
| CN108045135A (en) * | 2017-12-23 | 2018-05-18 | 王昊辰 | A kind of portable environmental-protection blackboard eraser |
| CN115986581A (en) * | 2023-03-03 | 2023-04-18 | 国网安徽省电力有限公司马鞍山供电公司 | Power distribution cabinet for power equipment |
-
1991
- 1991-01-24 CN CN 91210086 patent/CN2108633U/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984933A (en) * | 2017-12-23 | 2018-05-04 | 王昊辰 | A kind of application method of portable environmental-protection blackboard eraser |
| CN108045135A (en) * | 2017-12-23 | 2018-05-18 | 王昊辰 | A kind of portable environmental-protection blackboard eraser |
| CN115986581A (en) * | 2023-03-03 | 2023-04-18 | 国网安徽省电力有限公司马鞍山供电公司 | Power distribution cabinet for power equipment |
| CN115986581B (en) * | 2023-03-03 | 2023-09-22 | 国网安徽省电力有限公司马鞍山供电公司 | Power distribution cabinet for power equipment |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |