CN201105583Y

CN201105583Y - Roller dust-free blackboard eraser

Info

Publication number: CN201105583Y
Application number: CNU2007201999352U
Authority: CN
Inventors: 王建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-05
Filing date: 2007-12-05
Publication date: 2008-08-27
Anticipated expiration: 2017-12-05

Abstract

The utility model relates to a rolling type dust-free blackboard, comprising a frame, an annular flexible blackboard surface, an upper support roll, a lower support roll, a support bottom plate, a brush roll, and so on. What is different is that the support bottom plate supporting the flexible blackboard surface adopts an arcuate structure, the middle of which projects outwards, two tight rolls are arranged and clamped between the two surfaces of the flexible blackboard surface, the surface of the brush roll is provided with detachable strip-shaped felts along the axial direction, the brush roll is entirely in a detachable style, the ends of the identical sides of the support rolls and the brush roll are provided with a chain wheel which can carry out unilateral transmission, and a handle is arranged on a chain and can pull the chain. By adopting the arcuate support bottom plate, the flexible blackboard surface is attached well with the support bottom plate and is not likely to move during writing; by using the detachable brush roll, the surface of the brush roll, which is full of chalk dust after erasing for a plurality of times, can be conveniently cleaned; with the adoption of the detachable strip-shaped felts, a single detachable strip-shaped felt can be replaced alone when damaged, thus reducing use cost.

Description

The roller dust-free blackboard

Affiliated technical field

The utility model relates to a kind of teaching aid, especially a kind of roller dust-free blackboard.

Background technology

At present, the employed blackboard overwhelming majority is traditional Glass blackboard in teaching.Dust from flying during wiping has a strong impact on the health of Faculty and Students.For many years, the scheme of many kinds of dust-free blackboards has appearred in succession, comprising some roller dust-free blackboards.But not enough because of existing on the structure, use inconvenience, so do not popularized.The subject matter that existing roller dust-free blackboard exists comprises: flexible board face and base plate card close bad, and string is moving easily when writing; Brush roll is easy to clean not, and repeatedly the brush roll surface contains full chalk dust after the wiping, wipes unclean when wiping again.

Summary of the invention

For solving the above problems, the utility model provides a kind of roller dust-free blackboard, adopts curved plate and flexible board face tensioning apparatus, and flexible board face and base plate card close firmly, and it is moving to be difficult for string when writing; Brush roll adopts the bar shaped felt, and chalk dust is difficult for overworking, and brush roll can dismantle cleaning, therefore, can guarantee effective wiping.

The technical scheme that the utility model technical solution problem is adopted is: invent a kind of roller dust-free blackboard, the roller dust-free blackboard also is by framework, annular flexible board face, and the upper support roller, the lower support roller supports base plate, compositions such as brush roll.Different is, the support base plate of supporting flexible plate face adopts middle arcuate structure to outer process, on the flexible board face of support base backboard face one side, be provided with two idler rollers that are clipped in flexible board face two sides, be provided with tensioning spring between two idler rollers, be respectively equipped with brush roll and following brush roll at the back side of supporting base plate, brush roll is pressed on the flexible board face, brush roll constitutes by cylinder with at the detachable bar shaped felt that periphery is arranged vertically, one end of brush roll is provided with the axial compressive force spring, the other end and driving wheel are done active the connection, the same side end of backing roll and brush roll be provided with can unidirectional transmission sprocket wheel, the upper support roller, lower support roller, last brush roll, the sprocket wheel of following brush roll is connected by a chain, is provided with the handle of pulling chain on chain.

Beneficial effect

The beneficial effects of the utility model are that owing to adopt arc support base plate, flexible board face and support base plate card get togather, and are difficult for string when writing and move; Adopt detachable brush roll, be convenient to cleaning when the brush roll surface contains full chalk dust after wiping repeatedly; Adopt detachable bar shaped felt, when indivedual bar shaped felts damage, change separately, thereby reduce use cost.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the back front view of present embodiment, Fig. 2 is the left view of present embodiment, Fig. 3 is the profile of present embodiment, Fig. 4 is the B place enlarged drawing of present embodiment front view, Fig. 5 is the C place enlarged drawing of present embodiment left view, Fig. 6 is the D place enlarged drawing of present embodiment front view, and Fig. 7 is the E place enlarged drawing of present embodiment front view;

1 flexible board face among the figure, 2 fixed tensioning rollers, 3 chain handles, 4 tensioning springs, 5 eccentric wheels, 6 frames, 7 brush rolls, 8 chains, 9 brush roll sprocket wheels, 10 backing roll sprocket wheels, 11 backing rolls, 12 brush roll springs, 13 backboards, 14 support base plate, 15 movable idler rollers, 16 ash-pits.

The specific embodiment

Flexible board face (1), fixed tensioning roller (2), chain handle (3), tensioning spring (4), eccentric wheel (5), frame (6), brush roll (7), chain (8), brush roll sprocket wheel (9), backing roll sprocket wheel (10), backing roll (11), brush roll spring (12), backboard (13), support base plate (14), movable idler roller (15), ash-pit (16).

As shown in Figure 1, with deciding idler roller (2), on, following two brush rolls (7), on, following two backing rolls (11) are installed on the frame (6) by bearing, movable idler roller (15) is installed in the arc chute of frame (6) by bearing, annular flexible board face (1) is enclosed within as the mode of Fig. 3, on following two backing rolls (11), its front covers to be supported on the base plate (14), on, following two brush rolls (7) are pressed in the back of flexible board face (1), fixed tensioning roller (2) and movable idler roller (15) are clamped flexible board face (1), under the effect of tensioning spring (4), flexible board face (1) is strained as shown in Figure 4 and Figure 5, when needs dismounting brush rolls (7), can depress the handle of eccentric wheel (5) and push movable idler roller (15) to front, thereby loosen flexible board face (1), eccentric wheel (5) can be realized self-locking, and the handle that lifts eccentric wheel (5) when needing tensioning gets final product.One end of brush roll (7) has square hole, as shown in Figure 6 with brush roll sprocket wheel (9) axle on square cotter cooperate, the other end of brush roll (7) has the coil component spring hole, use brush roll spring (12) to be supported on the brushroll axle as shown in Figure 7, horizontal mobile brush roll (7) compression brush roll spring (12) during dismounting, the square hole of brush roll (7) one ends is withdrawed from from the square cotter on brush roll sprocket wheel (9) axle, the end that outward-dipping brush roll (7) will be equipped with brush roll spring (12) is again pulled up, press opposite operation in tandem during installation, it is demountable that brush roll (7) is gone up bar shaped felt foot, so that but wall scroll is changed when damaging, chain (8) hangs on brush roll sprocket wheel (9) and the backing roll sprocket wheel (10) as shown in Figure 2, all sprocket wheels all are provided with ratchet mechanism, can only unidirectional transmission, sprocket wheel can drive corresponding through-drive when upwards spurring chain handle (3), and the front of flexible board face (1) moves up, sprocket wheel idle running when moving down chain handle (3), flexible board face (1) is motionless.When the front of flexible board face (1) moved up, it was mobile to face down thereafter, and to close the moving direction at place opposite with flexible board face (1) direction with flexible board face (1) card under chain drives for brush roll this moment (7), thereby flexible board face (1) is carried out wiping.Chalk dust falls into ash-pit (16) with the rotation of brush roll (7), and the rear side of frame (6) is coated with backboard (13) chalk dust and can fly out, thereby can protect the healthy of Faculty and Students.

Claims

A kind of roller dust-free blackboard, the roller dust-free blackboard also is by framework, annular flexible board face, the upper support roller, the lower support roller, support base plate, compositions such as brush roll, it is characterized in that: the support base plate of supporting flexible plate face adopts middle arcuate structure to outer process, on the flexible board face of support base backboard face one side, be provided with two idler rollers that are clipped in flexible board face two sides, be provided with tensioning spring between two idler rollers, be respectively equipped with brush roll and following brush roll at the back side of supporting base plate, brush roll is pressed on the flexible board face, brush roll constitutes by cylinder with at the detachable bar shaped felt that periphery is arranged vertically, and an end of brush roll is provided with the axial compressive force spring, and the other end and driving wheel are done active the connection, the same side end of backing roll and brush roll be provided with can unidirectional transmission sprocket wheel, the upper support roller, lower support roller, last brush roll, the sprocket wheel of following brush roll is connected by a chain, is provided with the handle of pulling chain on chain.