CN2299721Y - Circulating erasion-free dustless blackboard - Google Patents
Circulating erasion-free dustless blackboard Download PDFInfo
- Publication number
- CN2299721Y CN2299721Y CN 97224443 CN97224443U CN2299721Y CN 2299721 Y CN2299721 Y CN 2299721Y CN 97224443 CN97224443 CN 97224443 CN 97224443 U CN97224443 U CN 97224443U CN 2299721 Y CN2299721 Y CN 2299721Y
- Authority
- CN
- China
- Prior art keywords
- circulating
- exempting
- endless belt
- free blackboard
- dust
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a circulating erasion-free dustless blackboard. A driving roller is driven by a motor arranged on a machine frame via a speed changer, the driving roller and a driven roller are sheathed with annular belts, and fiber mats respectively fixed on hinged back faces of the upper part and the lower part of the machine frame are attached to the face of the annular belt; both ends of the annular belt are sealed by baffle plates with sealing protecting edges, and the baffle plates are arranged on both sides of the machine frame. The motor drives the driving roller to cause the annular belt to move when the utility model is used. Chalk words on the face of the annular belt are cleanly erased by the fiber mats when the face of the annular belt written with chalk words passes through an upper protecting plate and a lower protecting plate. Chalk words are automatically erased by mechanization, chalk dust is not leaked, the body health of teachers is protected, and labor intensity is reduced.
Description
The utility model relates to a kind of teaching aid, the particularly circulating erasing dust-free blackboard of exempting from.
At present, generally all adopt the teaching of traditional blackboard chalk in school, serve as a teacher when wiping the letter written with chalk of the writing on the blackboard on the blackboard with blackboard eraser, can suck many chalk dusts, labour intensity is big, takes a lot of work, and is time-consuming; The big problem of chalk dust that produces when solving the letter written with chalk on erasing the board, invent dust absorption blackboard eraser, can siphon away most of chalk dust, but in the process that erases the board, also had the part chalk dust not siphon away, still can endanger the healthy of teacher, and need manually erase the board.
The purpose of this utility model is to provide a kind of circulating erasing dust-free blackboard of exempting from, and can replace manually wiping automatically the letter written with chalk on the blackboard, and chalk dust can outwards not revealed, and the protection teacher's is healthy, reduces labor intensity.
The utility model is achieved in that a kind of circulating erasing dust-free blackboard of exempting from, the motor of installing on frame drives drive roll by speed change gear, suit the endless belt on drive roll and driven cylinder, back at the endless belt working face is provided with supporting arrangement, linking the side respectively in the above and below of frame is the upper guard board and the following backplate of arc, on the back side on the upper and lower backplate top, the back side of the bottom of upper guard board, fixing fiber mat respectively, the fiber mat of upper guard board is fitted on the upper end face of endless belt, the fiber mat of following backplate is fitted on the rear surface of endless belt by fixture, the frame both sides to have the plate washer that seals safe edge sealed at both ends with the endless belt.
When the utility model uses, start the motor drives drive roll and rotate, make the endless belt motion, when the planar annular of writing full letter written with chalk passes through upper guard board or following backplate, the fiber mat that promptly is fixed thereon is wiped clean the letter written with chalk on the annular zone face, wipes the chalk dust that gets off and is collected and siphons away.
Fig. 1 is a structural representation of the present utility model, and Fig. 2 uses up the utility model A of baffle plate to side view.Below in conjunction with accompanying drawing the utility model is further described, a kind of circulating erasing dust-free blackboard of exempting from, go up the motor of installing (7) in frame (1) and drive drive roll (9) by speed change gear (8), speed change gear (8) can be a speed changer, also can pass through belt train speed change, endless belt (3) at drive roll (9) and the last suit of driven cylinder (6), endless belt (3) is a rubber strip, the back of (3) working face is provided with supporting arrangement (12) in the endless belt, supporting arrangement (12) can be an idler pulley, it also can be supporting splint, linking upper guard board that the side is an arc (2) and following backplate (5) respectively in the above and below of frame (1), on the back side on the upper and lower backplate in the back side (5) top of the bottom of upper guard board (2), fixing fiber mat (11) respectively, fiber (11) can be a felt, it also can be the fiber layer of cloth, the fiber mat (11) of the bottom of upper guard board (2) is fitted on the upper end face of endless belt (3), the fiber mat (11) of following backplate (5) is fitted on the rear surface of endless belt (3) by fixture (13), fixture (13) can be a pin, it also can be snap close, frame (1) both sides to have the baffle plate (4) that seals safe edge sealed at both ends with endless belt (3), frame (1) shell is provided with air suction opening (10), behind the external dust catcher, can siphon away immediately wiping the chalk dust that gets off.
Claims (7)
1, a kind of circulating erasing dust-free blackboard of exempting from, it is characterized in that going up the motor of installing (7) in frame (1) drives drive roll (9) by deceleration device (8), go up suit at the driven cylinder of drive roll (9) (6) and endless belt (3), the back of (3) working face is provided with supporting arrangement (12) in the endless belt, linking upper guard board that the side is an arc (2) and following backplate (5) respectively in the above and below of frame (1), on the back side on the upper and lower backplate in the back side (5) top of the bottom of upper guard board (2), fixing fiber mat (11) respectively, the fiber mat (11) of upper guard board (2) is fitted on the upper end face of endless belt (3), the fiber mat (11) of following backplate (5) is fitted on the rear surface of endless belt (3) by fixture (13), frame (1) both sides to have the plate washer (4) that seals safe edge sealed at both ends with endless belt (3).
2, the circulating erasing dust-free blackboard of exempting from according to claim 1 is characterized in that speed change gear (8) can be a speed changer, also can be belt train speed change.
3, the circulating erasing dust-free blackboard of exempting from according to claim 1 is characterized in that endless belt (3) is rubber strip.
4, the circulating erasing dust-free blackboard of exempting from according to claim 1 is characterized in that fiber mat (11) can be a felt, also can be the fiber layer of cloth.
5, the circulating erasing dust-free blackboard of exempting from according to claim 1 is characterized in that wanting frame (1) shell to be provided with air suction opening (10).
6, the circulating erasing dust-free blackboard of exempting from according to claim 1 is characterized in that fixture (13) can be a pin, also can be the pin button.
7, the circulating erasing dust-free blackboard of exempting from according to claim 1 is characterized in that supporting arrangement (12) can be an idler pulley, also can be the rest supporting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97224443 CN2299721Y (en) | 1997-08-13 | 1997-08-13 | Circulating erasion-free dustless blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97224443 CN2299721Y (en) | 1997-08-13 | 1997-08-13 | Circulating erasion-free dustless blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2299721Y true CN2299721Y (en) | 1998-12-09 |
Family
ID=33938792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97224443 Expired - Fee Related CN2299721Y (en) | 1997-08-13 | 1997-08-13 | Circulating erasion-free dustless blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2299721Y (en) |
-
1997
- 1997-08-13 CN CN 97224443 patent/CN2299721Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |