CN2565638Y

CN2565638Y - Rolling dustless blackboard eraser

Info

Publication number: CN2565638Y
Application number: CN 02222669
Authority: CN
Inventors: 李书菊; 夏麒彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-22
Filing date: 2002-05-22
Publication date: 2003-08-13
Anticipated expiration: 2012-05-22

Abstract

The utility model relates to a blackboard eraser which is used for erasing chalk writing on blackboards. The blackboard eraser is mainly composed of a plurality of rotary-shaft assembles, a blackboard-eraser box, longitudinal bristle rows, a hair-brush board, a through hole, a dust collection box, etc. The rotary-shaft assemble is composed of a roll wheel, felt barrels and rotary shafts. The felt barrel is formed by that a plurality of felt rings are stacked on the rotary shaft. The diameter of the felt barrel is larger than that of the roll wheel. Clearance is kept between two adjacent felt barrels. The rotary-shaft assembles are fixed on the blackboard-eraser box through an upper bearing cover and a lower bearing cover, and can rotate in shaft holes. The hair-brush board is provided with longitudinal bristle rows of which the number is the same as the number of the rotary-shaft assembles. Vertical space is kept among rows. The wall surface of the blackboard-eraser box under the longitudinal bristle rows is provided with a plurality of slot holes. The slot holes are communicated with the dust collection box. The blackboard eraser can improve erasing effect, and eliminates the defects of dust nuisance and air pollution when common blackboard erasers are used.

Description

The roller dust-free black board eraser

Technical field

The utility model relates to the blackboard eraser that is used to wipe the blackboard chalk writing.

Background technology

Blackboard eraser commonly used at present has two kinds on brush type and felt type, all uses the sliding friction principle to wipe the blackboard chalk writing.These two kinds of blackboard erasers, though simple in structure, cheap, in use all there are dust pollution, unhealthful defective.

Because of bristles are difficult for the absorption dust, the hairbrush blackboard eraser is difficult to the wiping effect that reaches desirable, and because the elasticity of bristles also can make chalk dust fill the air everywhere; Felt is also limited to the suction-operated of dust, when felt blackboard eraser surface ratio is clean, has wiping effect preferably, but it is not long during this period of time, also just equal the time that the blackboard writing of 1～2 square metre of area of wiping is spent, after one deck chalk dust has been adsorbed on its surface, continue to come blackboard wiping with it, so not only can not clean off a blackboard, can make on the contrary that chalk dust flies upward everywhere, contaminated air, infringement health.

Summary of the invention

The purpose of this utility model is to provide the roller dust-free black board eraser, and this blackboard eraser can improve wiping effect, can eliminate dust from flying, air-polluting defective when using the blackboard eraser use always again.

In order to reach above technical purpose, the utility model provides following technical scheme.

The roller dust-free black board eraser, mainly by several rotating shaft combinations, board wiper box, the vertical row of mane, brush plate, through hole, compositions such as dust collection box, described rotating shaft combination is by roller, the felt tube, rotating shaft is formed, described felt tube is by many felt circles folded mutually forming in rotating shaft, its diameter is greater than the diameter of roller, leave the gap between two adjacent felt tubes, described rotating shaft combination is by last, lower ball cover is fixed on the board wiper box, and can in axis hole, rotate, the vertical row of row's number mane identical with the rotating shaft combined number is arranged on the described brush plate, leave vertical space between row and row, have some slotted eyes on the board wiper box wall thereunder, described slotted eye and dust collection box connect.

Do not allow to rotate between roller in the rotating shaft combination and felt tube and the rotating shaft, and they are fixed into an integral body vertically with nut, packing ring etc., described felt tube is by round outside but spuare inside felt circle folded mutually forming in rotating shaft of many " ancient money " shape, and roller can be made with the hard rubber material.By the bearing cap and the screw of two ends separable type, the rotating shaft combination is installed on the board wiper box, and can rotate in axis hole, at the lower ball cover place thrust plate is installed also.Each blackboard eraser can have 2～4 such rotating shaft combinations.Simultaneously, the diameter of felt tube is bigger 2～4 millimeters than the diameter of roller, 1 mm clearance of having an appointment between two adjacent felt tubes.The distribution of mane is discontinuous on the brush plate, but line up several vertical rows discontinuously, its row's number is identical with the rotating shaft combined number, leave enough vertical spaces between row and row, this is the vertical channel that dust falls, correspondingly, have some slotted eyes and dust collection box and connect on the board wiper box wall below the vertical channel, dust hole thus falls into the collection box.

Mane vertical row keep in touch on total length with felt barrel mast face bus, the dust that it in time adsorbs on the scrubbing brush fuds fuddled felt barrel mast face.Install one and adjust pad between board wiper box and brush plate, the distance between vertical row of mane and felt tube can be adjusted pad by increase and decrease and adjust within the specific limits.

The dust collection box can be a transparent plastic casing, is installed in the below of board wiper box, and and board wiper box between be removably connecting of drawer type, when observing when collecting box and being full of, it can be unloaded dust easily from board wiper box by dust.

During use, hold board wiper box, make the dust collection box, make the felt tube be close to the blackboard surface, vertically exert pressure, on left and right direction, drive blackboard eraser and move reciprocatingly to blackboard down.

When our hand takes blackboard eraser when blackboard is vertically exerted pressure, because felt tube quality is than rubber roll softness, and its diameter is bigger, so make the felt tube that deformation radially take place.But because of the support and the restriction of two rubber roll, this radial deformation is controlled in again in reasonable, the limited scope, and the felt tube is unlikely to be pressed too flatly and can roll.

When our hand took the blackboard eraser left and right directions reciprocating, rubber roll was serving as the role of friction pulley and driving wheel, and under the frictional force effect, they will make pure rolling on the blackboard vertical plane, and the felt tube in the middle part of driving also rolls on the blackboard surface.But because the radial deformation of felt tube, their rolling no longer is a pure rolling, but a kind of " trackslipping ", the i.e. motion of " changeing not only but also sliding ".Blackboard eraser can be wiped the chalk writing on blackboard surface by means of this motion.

Because felt materials has suction-operated preferably, it can be adsorbed on the dust of wiping on the felt cylinder in time, and the felt tube that has adsorbed dust is rotated further, and has just entered board wiper box inside.When the felt socket joint touched the vertical row of mane, mane alignment gesture just cleaned the dust that adsorbs on the felt tube get off in time, and by the vertical channel of dust whereabouts and the perforation slotted eye on the wall of box below, fell in the dust collection box.

The felt tube gyrates, and said process just constantly repeats and circulation.

The beneficial effect that the utlity model has is apparent.Because the process of cleaning, brush fuds fuddled felt tube absorption dust, be to carry out in the board wiper box inside of sealing, so can not occur that chalk dust flies upward, air-polluting problem everywhere, adsorbed by the felt tube in blackboard one side owing to chalk dust again, when the felt tube goes to the vertical row of mane one side, chalk dust by mane row cleaning, so the absorption-cleaning course of dust carries out with intersection at any time, can make blackboard eraser keep wiping effect preferably at once all the time.

Description of drawings

Fig. 1 is a longitudinal sectional view of the present utility model

Fig. 2 is that the cutaway view along axis is made up in the rotating shaft in the utility model

Fig. 3 is the schematic diagram of felt circle in Fig. 2 rotating shaft combination

Fig. 4 is a transverse sectional view of the present utility model.

Specific embodiments

Referring to Fig. 1, Fig. 2, Fig. 3, the roller dust-free black board eraser, mainly by several rotating shaft combinations 1, board wiper box 3, the vertical row 4 of mane, brush plate 6, through hole 8, dust collection box 9 compositions such as grade, described rotating shaft combination 1 is by roller 11, felt tube 13, rotating shaft 14 is formed, described felt tube 13 is by many felt circles 7 folded mutually forming in rotating shaft, its diameter is bigger 2～4 millimeters than the diameter of roller, leave about 1 mm clearance between two adjacent felt tubes, described roller 11, felt tube 13 and rotating shaft 14 are by nut 10, packing ring 12 grades are fixed to an integral body vertically, described rotating shaft combination 1 is by last, lower ball cover 2,2 ' is fixed on the board wiper box 3, and can in axis hole, rotate, locate to be equipped with thrust plate 15 at lower ball cover 2 ', the vertical row 4 of row's number mane suitable with the rotating shaft combined number is arranged on the described brush plate 6, leave vertical space between row and row, have some slotted eyes 8 on the board wiper box wall thereunder, described slotted eye 8 connects with dust collection box 9.

Mane vertical row keep in touch on total length with felt barrel mast face bus, and distance between the two can be adjusted pad 5 by increase and decrease and adjust within the specific limits.

Referring to Fig. 4, this roller dust-free black board eraser has 2～4 rotating shaft combinations 1, and the distribution of mane is discontinuous on brush plate 6, but line up several vertical rows discontinuously, its row's number equates with the rotating shaft number of combinations, leaves enough vertical spaces between row and row, and this is the vertical channel that dust falls.

Claims

1 roller dust-free black board eraser, mainly by several rotating shaft combinations (1), board wiper box (3), the vertical row of mane (4), brush plate (6), through hole (8), dust collection box compositions such as (9), described rotating shaft combination (1) is by roller (11), felt tube (13), rotating shaft (14) is formed, described felt tube (13) is by a large amount of felt circles (7) folded mutually forming in rotating shaft, its diameter is greater than the diameter of roller, leave the gap between two adjacent felt tubes, described rotating shaft combination (1) is by last, lower ball cover (2,2 ') be fixed on the board wiper box (3), and can in axis hole, rotate, row's number mane vertical row (4) suitable with the rotating shaft combined number arranged on the described brush plate (6), leave vertical space between row and row, have some slotted eyes (8) on the board wiper box wall thereunder, described slotted eye (8) connects with dust collection box (9).

2 blackboard erasers as claimed in claim 1 is characterized in that, 2～4 rotating shaft combinations are arranged on each blackboard eraser.

3 blackboard erasers as claimed in claim 1 is characterized in that, the diameter of described felt tube is bigger 2～4 millimeters than the diameter of roller, 1 mm clearance of having an appointment between two adjacent felt tubes.

4 blackboard erasers as claimed in claim 1 is characterized in that, described rotating shaft combination (1) locates to be equipped with thrust plate (15) at lower ball cover (2 ').

5 blackboard erasers as claimed in claim 1 is characterized in that, have one to adjust pad (5) between board wiper box (3) and brush plate (6).

6 as claim 1,2,3,4 or 5 described blackboard erasers, it is characterized in that, and be removably connecting of drawer type between dust collection box (9) and the board wiper box (3).