CN101367309A - Negative-pressure dust-less blackboard - Google Patents
Negative-pressure dust-less blackboard Download PDFInfo
- Publication number
- CN101367309A CN101367309A CNA2008101403678A CN200810140367A CN101367309A CN 101367309 A CN101367309 A CN 101367309A CN A2008101403678 A CNA2008101403678 A CN A2008101403678A CN 200810140367 A CN200810140367 A CN 200810140367A CN 101367309 A CN101367309 A CN 101367309A
- Authority
- CN
- China
- Prior art keywords
- blackboard
- negative
- dust
- fan
- blackboard body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention relates to a negative-pressure dust-free blackboard, which belongs to a teaching appliance. The negative-pressure dust-free blackboard comprises a blackboard body, and is characterized in that suction holes which are arranged in rows are regularly distributed on the surface of the blackboard body; the size of the suction holes is designed for chalk dust to pass through; the row pitch is the height of a normal letter written with chalk; the reverse side of the blackboard body is connected with a funnel-shaped collecting hopper; edges of a large end of the collecting hopper are correspondingly fixed on edges of the blackboard body and a small end of the connecting hopper is connected with a suction pipe; the suction pipe is communicated with the outside of a classroom and connected with a fan which is positioned on the outside of the classroom; and a power switch of the fan is arranged inside the classroom. During the process of cleaning the blackboard, the power switch of the fan is turned on; a negative-pressure area is formed on the surface of the blackboard under the action of the fan; and the chalk dust enters into the suction pipe through the suction holes under the action of the negative pressure and is exhausted to the outside of the classroom by the fan, thereby the dust can be effectively reduced. Moreover, the suction holes which are arranged in the rows can also be taken as transverse lines of writing on the blackboard, thus the writing on the blackboard can be more sequentially and beautiful with the transverse lines as reference when people write on the blackboard.
Description
Technical field
The present invention 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.
Summary of the invention
The object of the present invention is to provide a kind of negative-pressure dust-less blackboard, this blackboard can either less effectively dust, sideslip in the time of can preventing to write in the above again.
The present invention solves the technical scheme that its technical problem takes: 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 invention has the beneficial effects as follows: 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 invention;
Fig. 2 is a rearview of the present invention;
Fig. 3 is a vertical view of the present invention.
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)
1. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101403678A CN101367309A (en) | 2008-10-10 | 2008-10-10 | Negative-pressure dust-less blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101403678A CN101367309A (en) | 2008-10-10 | 2008-10-10 | Negative-pressure dust-less blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101367309A true CN101367309A (en) | 2009-02-18 |
Family
ID=40411361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101403678A Pending CN101367309A (en) | 2008-10-10 | 2008-10-10 | Negative-pressure dust-less blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101367309A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742624A (en) * | 2015-04-13 | 2015-07-01 | 石昌远 | Dust-free blackboard eraser |
| CN105922794A (en) * | 2016-05-25 | 2016-09-07 | 张子祺 | Dust absorption blackboard |
| CN107150532A (en) * | 2017-07-10 | 2017-09-12 | 无锡市南长实验中学 | A kind of blackboard of pupil's automated cleaning |
| WO2019229279A1 (en) * | 2018-06-01 | 2019-12-05 | Universidad De Valladolid | System for improving air quality around a blackboard via localised extraction of contaminated air |
| CN113620481A (en) * | 2021-10-14 | 2021-11-09 | 江苏江昕轮胎有限公司 | Circulating water system's optimization structure in rubber tire production |
-
2008
- 2008-10-10 CN CNA2008101403678A patent/CN101367309A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742624A (en) * | 2015-04-13 | 2015-07-01 | 石昌远 | Dust-free blackboard eraser |
| CN105922794A (en) * | 2016-05-25 | 2016-09-07 | 张子祺 | Dust absorption blackboard |
| CN107150532A (en) * | 2017-07-10 | 2017-09-12 | 无锡市南长实验中学 | A kind of blackboard of pupil's automated cleaning |
| WO2019229279A1 (en) * | 2018-06-01 | 2019-12-05 | Universidad De Valladolid | System for improving air quality around a blackboard via localised extraction of contaminated air |
| CN113620481A (en) * | 2021-10-14 | 2021-11-09 | 江苏江昕轮胎有限公司 | Circulating water system's optimization structure in rubber tire production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101367309A (en) | Negative-pressure dust-less blackboard | |
| CN201922757U (en) | Automatic dust-collecting blackboard | |
| CN201264445Y (en) | Negative-pressure dust-less blackboard | |
| CN205112786U (en) | Multifunctional blackboard eraser | |
| CN204398650U (en) | A kind of blackboard with groove for collecting chalk dust | |
| CN203995303U (en) | With the dustproof blackboard of blackboard eraser | |
| CN206186630U (en) | No dust blackboard and blackboard eraser of forming a complete set with it | |
| CN203391535U (en) | Blackboard for preventing dust from flying | |
| CN205705888U (en) | The greyish black blackboard eraser of chargeable suction | |
| CN206170963U (en) | Novel dust free blackboard suitable for teaching of english specialty is used | |
| CN201552925U (en) | Dust collecting blackboard eraser without rope | |
| CN206277843U (en) | A kind of blackboard eraser collected and recycle chalk dust | |
| CN203126302U (en) | Dust-removing eraser | |
| CN206049128U (en) | A kind of blackboard of convenient use | |
| CN103264600A (en) | Dust collecting blackboard eraser | |
| CN2871230Y (en) | Dust-collecting blackboard | |
| CN202389064U (en) | Dust-collection chalk eraser | |
| CN201685626U (en) | Blackboard chalk tray collector | |
| CN202123862U (en) | Water spray blackboard eraser | |
| CN201872493U (en) | Dust collection blackboard eraser | |
| CN201970738U (en) | Automatic dust suction blackboard eraser | |
| CN201021030Y (en) | Dust-absorbing blackboard eraser | |
| CN2785874Y (en) | Magnetic dust-eliminating blackboard | |
| CN201061969Y (en) | Dust-free chalk eraser | |
| CN108068505A (en) | Automatic dust-free blackboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090218 |