CN201264445Y

CN201264445Y - Negative-pressure dust-less blackboard

Info

Publication number: CN201264445Y
Application number: CNU200820173004XU
Authority: CN
Inventors: 范晓晨
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-10
Filing date: 2008-10-10
Publication date: 2009-07-01
Anticipated expiration: 2018-10-10

Abstract

The utility model relates to a negative pressure dustless blackboard which belongs to teaching aids. The utility model is characterized in that sucking holes which are ranged in lines are regularly distributed on the surface of a blackboard body; chalk dust can pass through the sucking holes, and the line space of the sucking holes is the height of a normal letter written with chalks; the back side of the blackboard body is connected with a funnel-shaped collecting bucket; each edge of the big end of the collecting bucket is correspondingly fixed on the edges of the blackboard body; the small end is connected with a sucking tube; the sucking tube is communicated with the outdoor, and is connected with an outdoor blast blower; and a power switch of the blast blower is arranged indoors. During blackboard cleaning, the power supply of the blast blower is switched off, and a negative pressure region is formed on the blackboard surface under the action of the blast blower. Chalk dust enters the sucking tube through the sucking holes under the action of negative pressure, and then, the chalk dust is discharged to the outdoor by the blast blower, so the dust is effectively reduced. In addition, the sucking holes which are ranged in lines can be used as transverse lines for blackboard writing. Because of the reference of the transverse lines when people write words on blackboards, the writing is tidy and beautiful.

Description

Negative-pressure dust-less blackboard

Technical field

The utility model relates to a kind of teaching aid, specifically a kind of negative-pressure dust-less blackboard.

Background technology

Now the teacher overwhelming majority that teaches will use blackboard, chalk dust all can fly around when erasing the board at every turn, not only pollute the environment in the classroom, but also influence that can be bad to teacher and classmates' healthy generation, in addition, present blackboard surface does not have object of reference, and easy sideslip when writing influences the overall appearance of writing on the blackboard.

The utility model content

The purpose of this utility model is to provide a kind of negative-pressure dust-less blackboard, and this blackboard can either less effectively dust, sideslip in the time of can preventing to write in the above again.

The technical scheme in the invention for solving the technical problem is: a kind of negative-pressure dust-less blackboard, comprise the blackboard body, it is characterized in that, described blackboard body surface is distributed with the suction hole of embarking on journey and arranging by rule, the size in described suction hole is passed through for holding chalk dust, line space is the height of normal letter written with chalk, the back side of blackboard body links to each other with a funnelform collection bucket, the big end of collection bucket is consistent with blackboard body size shape, each limit is fixed on the edge of blackboard body accordingly, the small end of collection bucket links to each other with suction pipe, and suction pipe leads to and outdoorly is positioned at outdoor air blast and links to each other with one, and the power switch of air blast is located at indoor.

The beneficial effects of the utility model are: blackboard surface can form a negative pressuren zone under the effect of air blast, and chalk dust enters suction pipe by inhaling the hole under the effect of negative pressure, is discharged to outdoorly again by air blast, can effectively reduce dust; In addition, the suction hole of the arrangement of embarking on journey can also have horizontal line to do reference neat appearance more when writing on blackboard as the horizontal line of writing on the blackboard.

Description of drawings

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

Fig. 2 is a rearview of the present utility model;

Fig. 3 is a vertical view of the present utility model.

Among the figure: 1 blackboard body, 2 inhale hole, 3 suction pipes, 4 air blasts, 5 collection buckets.

The specific embodiment

As shown in Figure 1.A kind of negative-pressure dust-less blackboard, comprise blackboard body 1, described blackboard body 1 surface is distributed with the suction hole 2 of embarking on journey and arranging by rule, the size in described suction hole 2 is passed through for holding chalk dust, line space is the height of normal letter written with chalk, as Fig. 2, Fig. 3, the back side of blackboard body 1 links to each other with a funnelform collection bucket 5, the big end of collection bucket 5 is consistent with blackboard body 1 size shape, each limit is fixed on the edge of blackboard body 1 accordingly, the small end of collection bucket 5 links to each other with suction pipe 4, and suction pipe 4 leads to and outdoorly is positioned at outdoor air blast 4 and links to each other with one, and the power switch of air blast 4 is located at indoor.

When erasing the board, power switch closure with air blast 4, at this moment air blast 4 begins to be discharged to outdoor from indoor extracting air, as Fig. 1, Fig. 2, shown in Figure 3, the blackboard surface will form a negative pressuren zone under the effect of air blast 4, chalk dust can be under the effect of negative pressure be sucked into suction pipe 3 by inhaling hole 2 through collection bucket 5, and then is discharged to outdoorly by air blast 4, has so just effectively reduced the dust in the classroom.In addition, the suction hole 2 of arranging of embarking on journey can be used as the reference horizontal line of writing on the blackboard, has had horizontal line to do reference when writing on blackboard, and just writing not can sideslip, makes writing on the blackboard neat appearance more.

Claims

1, a kind of negative-pressure dust-less blackboard, comprise the blackboard body, it is characterized in that, described blackboard body surface is distributed with the suction hole of embarking on journey and arranging by rule, the size in described suction hole is passed through for holding chalk dust, line space is the height of normal letter written with chalk, the back side of blackboard body links to each other with a funnelform collection bucket, the big end of collection bucket is consistent with blackboard body size shape, each limit is fixed on the edge of blackboard body accordingly, the small end of collection bucket links to each other with suction pipe, and suction pipe leads to and outdoorly is positioned at outdoor air blast and links to each other with one, and the power switch of air blast is located at indoor.