CN201068045Y - Car type dust-free blackboard eraser - Google Patents

Abstract

The utility model relates to a limousine type dust free blackboard eraser. A common blackboard eraser (11) is put into a bottomless blackboard eraser box (1) in the middle of a plastic casing body which has a left dust sucking structure and a right dust sucking structure, during the wiping, a friction wheel (18) which makes contact with the blackboard rotates under the effect of the frictional force, through the accelerating of the middle driving, a sucking fan (29) is driven to rotate in a high speed to generate the suction force, additionally combined with the relative flowing of the air and the accelerating effect of a flare opening designed on the casing body, the dust is rapidly sucked into a dust box, during the wiping leftwards, the right dust sucking structure works, and the dust is sucked into the right dust box; during the wiping rightwards, the left dust sucking structure works, and the dust is sucked into the left dust box (the picture shows the state during the left wiping). The switch of the working of the left and right dust sucking structure is automatically achieved through depending on a cone-shaped friction wheel (24) which is installed on a sucking fan axis (26) to slip horizontally under the inertia function. The channel which sucks the dust is blocked through a soft open-close piece (28) to prevent the dust from escaping.

Description

The car type dust-free black board eraser

Technical field:

The utility model relates to teaching aid, especially a kind of dust-free black board eraser.

Background technology:

Ordinary blackboard eraser is when erasing the board, and dust from flying had both polluted environment; more teacher, student's health is brought significant threat, bring potential crisis, chalk also is disposable; also brought waste, the overall situation that this and advocating environment protection, pursuit health, attention are saved is incompatible with.And the electrification that present dust absorption blackboard eraser has drives, and wastes energy, and the structure that has is too simple, weak effect, and what have is too complicated, is not easy to promote.

Summary of the invention:

The purpose of this utility model provides a kind of car type dust-free black board eraser, in order to overcome the above-mentioned defective of existing in prior technology effectively.The utility model is ordinary blackboard eraser is put into plastic casing with dust absorbing structure and to realize, it is by blackboard eraser, housing, dust absorbing structure is formed, its main points are: no end blackboard eraser box (1) is in the centre of plastic casing, part is the carriage (13) that the pit of shock mount (14) is arranged around it, push down a terminal adjustment screw (8) that contacts with blackboard eraser (11) plank upper surface is arranged in the screwed hole on the blackboard eraser lid of blackboard eraser (11) plank upper surface, two cover dust absorbing structures in the dust box of housing both sides are symmetrically arranged along the blackboard eraser center, the annexation of right dust absorbing structure is: friction pulley (18) and awl friction pulley (21) are fixed on the friction wheel axle (19) by interference fit, the left end that sucks fan axle (26) is installed suction fan (29), right-hand member is along feather key (25) left and right sides slippage and awl friction pulley (24) between small structure (27) and awl friction pulley (21), friction wheel axle (19) and suck fan axle (26) respectively with dust room (17) on aperture (20) and (27) formation matched in clearance, be enclosed within on the suction fan axle (26) at soft material folding sheet (28) sky between horn mouth structure (16) and the small structure (27), horn mouth structure (16) forms horn mouth on every side in snag (15), and screwdriver (12) is contained in the screwdriver box (6).The utility model advantage: 1. structure is light and handy: this product can adopt plastics, rubber to make, and simple in structure, easy to manufacture, cost is low.2. inhalation rate height: inhale the formula structure about employing, action matches when wiping, and sucking fan, to suck direction consistent with wind direction, sucks and adopt the horn mouth structure between fan and snag, uses the air flow property principle, makes the air flow faster, improved inhalation rate greatly.3. general rate height: directly existing blackboard eraser being put into shell can use.4. environmental protection and economy: the artificial drive, not electrification.5. easy to use: using method and ordinary blackboard eraser are as good as.6. the life-span is permanent: by regulating, can use the snag wearing and tearing totally, more renew blackboard eraser and continue to use.

Description of drawings:

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

Fig. 2 is an A-A cutaway view of the present utility model

Fig. 3 is B-B cutaway view of the present utility model (wiping when moving left)

Fig. 4 is a left view of the present utility model

Each several part sequence number and title: 1. blackboard eraser box, 2. handle, 3. dust box, 4. dust box switch, 5. pit, 6. screwdriver box, 7. screwdriver box switch, 8. adjustment screw, 9. blackboard eraser box switch, 10. dust box switch, 11. blackboard erasers, 12. screwdrivers, 13. carriage, 14. springs, 15. snags, 16. the horn mouth structure, 17. dust room, 18. friction pulleys, 19. friction wheel axle, 20. small structures, 21. awl friction pulleys, 22. filtering window, 23. filter sponge, 24. awl friction pulleys, 25. feather key, 26. suck fan axle, 27. small structures, 28. soft material folding sheet, 29. suck fan.

The specific embodiment:

Accompanying drawing has provided specific embodiment of the utility model: according to Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, open blackboard eraser box switch (9), ordinary blackboard eraser (11) is placed in the no end blackboard eraser box (1) of plastic casing, part supports by four springs (14) on the carriage (13) around its plank lower surface, blackboard eraser box switch (9) closes, 4 millimeters of housings are stretched out in snag (15), in the screwed hole of adjustment screw (8) on the blackboard eraser lid, its end contacts with ordinary blackboard eraser (11) plank upper surface.Carriage (13) and horn mouth structure (16) form horn mouth, and inner edges is apart from (15) 6 millimeters of snags.Grasp handle (2), be placed on the blackboard, applying a suitable pressure wipes moving left fast, slippage awl friction pulley (24) in the right dust absorbing structure moves to right under effect of inertia and abuts against on the awl friction pulley (21), soft material folding sheet (28) is opened under the effect of inertia and gas shock, the friction pulley (18) that exposes 2 millimeters of plastic casings with the friction of blackboard under rotate, drive friction wheel axle (19), awl friction pulley (21) rotates, make awl friction pulley (24) quicken to rotate by frictional force, drive again and suck fan axle (26), sucking fan (29) rotates, produce suction, adding the air that produces when quick wiping is moved flows and bell-mouthed acceleration relatively fast, three are combined into one, dust is sucked fast, stay in the dust room (17) by the filtration of filtering sponge (23), and this moment, the slippage awl friction pulley in the left dust absorbing structure also moved to right under action of inertia, two awl friction pulleys are disengaged, drive path is cut off, soft material folding sheet is also blocked suction passage under action of inertia, prevents the dust effusion that the left side is inhaled into.Just in time opposite when wiping to the right with said process.Open dust box switch (4), (10), can pour out dust.Along with the wearing and tearing of snag (15), screw the extension elongation that adjustment screw (8) is regulated snag (15) with screwdriver (12).

Claims (4)

1. car type dust-free black board eraser, by blackboard eraser, housing, dust absorbing structure is formed, it is characterized in that: no end blackboard eraser box (1) is in the centre of plastic casing, part is the carriage (13) that the pit of shock mount (14) is arranged around it, push down a terminal adjustment screw (8) that contacts with blackboard eraser (11) plank upper surface is arranged in the screwed hole on the blackboard eraser lid of blackboard eraser (11) plank upper surface, two cover dust absorbing structures in the dust box of housing both sides are symmetrically arranged along the blackboard eraser center, the annexation of right dust absorbing structure is: friction pulley (18) and awl friction pulley (21) are fixed on the friction wheel axle (19) by interference fit, the left end that sucks fan axle (26) is installed suction fan (29), right-hand member is along feather key (25) left and right sides slippage and awl friction pulley (24) between small structure (27) and awl friction pulley (21), friction wheel axle (19) and suck fan axle (26) respectively with dust room (17) on aperture (20) and (27) formation matched in clearance, be enclosed within on the suction fan axle (26) at soft material folding sheet (28) sky between horn mouth structure (16) and the small structure (27), horn mouth structure (16) forms horn mouth on every side in snag (15), and screwdriver (12) is contained in the screwdriver box (6).

2. car type blackboard eraser according to claim 1 is characterized in that said blackboard eraser box (1) is gone to the bottom and is hollow that blackboard eraser (11) is put into wherein, and 4 millimeters of housings are exposed in snag (15).

3. car type blackboard eraser according to claim 1 is characterized in that said friction pulley (18) exposes 2 millimeters of housings.

4. car type blackboard eraser according to claim 1 is characterized in that said horn mouth inward flange is apart from (15) 6 millimeters of snags.

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