CN2518699Y - Blackboard - Google Patents
Blackboard Download PDFInfo
- Publication number
- CN2518699Y CN2518699Y CN 02209936 CN02209936U CN2518699Y CN 2518699 Y CN2518699 Y CN 2518699Y CN 02209936 CN02209936 CN 02209936 CN 02209936 U CN02209936 U CN 02209936U CN 2518699 Y CN2518699 Y CN 2518699Y
- Authority
- CN
- China
- Prior art keywords
- blackboard
- triangular prism
- utility
- model
- face
- 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 blackboard, belonging to the technical field of the cultural articles of the articles for daily use, with the technical proposal being that the faces of an equilateral triangular prism form the face of the blackboard, and the axles of the triangular prism are provided with rotary shafts which are arranged on a frame in a row. Hereby, the basic proposal of the utility model is fulfilled. The utility model has the advantage that the revolving of the triangular prism can change partial or whole face of the blackboard for three times, which reduces twice erasing of the blackboard and overcomes the defects of the prior blackboard which needs frequent erasing.
Description
Technical field
The utility model belongs to the cultural goods technical field in daily.
Background technology
The classroom front end is the view picture plate face of painting and constituting with plank, glass plate or metallic plate for the blackboard that the personnel that give lessons use at present, the literal that the personnel that give lessons write in the above with chalk, because the breadth of existing blackboard generally can not be write the content that will tell about, in teaching, want blackboard wiping for several times, increased the personnel's that give lessons labour intensity, taken hours of instruction, and contaminated environment, harm teacher and student's health.
Summary of the invention
The objective of the invention is to design a kind of blackboard of turning increase breadth quantity, reduce the wiping number of times, overcome existing blackboard above shortcomings.
The technical solution of the utility model is the plate face that is connected into the view picture blackboard with the cylinder of one group of regular triangular prism.On the axis of each triangular prism turning cylinder is housed.Turning cylinder is installed on the framework side by side.Below promptly finish basic scheme of the present utility model.
Use good effect of the present invention to be owing to rotate triangular prism, can make view picture or local blackboard surface conversion three times, make this blackboard, will make its area increase by three times by size before, generally speaking, in teaching without wiping.Not only overcome the shortcoming that frequent wiper cord comes in teaching, but also can be in advance writing the interior figure of perhaps drawing that will say on each face, turning-over changed while explaining, played the effect of projecting apparatus to a certain extent.
For making things convenient for the rotation of the utility model triangular prism, can turn-knob be installed in the turning cylinder end that each regular triangular prism stretches out outside the frame, hand-held this turn-knob rotates triangular prism.
In addition,, influence the smooth of whole plate face, can between triangular prism end and framework, damping fin or alignment pin be installed for preventing the slight stressed deflection of triangular prism in this blackboard.
To above scheme again one improvement be when needs blackboard horizontal direction extends, be out of shape for preventing the long of triangular prism, quality of fit descends, and can be made into by the synthetic disjunctor framework of several frameworks, forms the form that horizontal direction is joined by number former faces.
Last improves and is to above scheme, for making the one group triangular prism while Rotation With Changing face of formation with the former face, the gear of the unidirectional drive chain-wheel mechanism of identical similar bicycle rear can be installed on each triangular axis of a cylinder, use a toothed rack, mesh whole gears, promote the chi bar, both can realize triangular prism while Rotation With Changing face on the same group, available again turn-knob is upset triangular prism wherein separately, the local writing surface of conversion.
Making material of the present utility model can be timber, plastics and metal.
Description of drawings
Fig. 1 is the whole front elevation of the utility model
Fig. 2 is the triangular prism Rankine-Hugoniot relations figure in the utility model
Embodiment
Make regular triangular prism 1 with engineering plastics, the length that is of a size of triangular prism is 1000mm, and crest line is that the summit radius of gyration of cross section is 50mm, and the surface is with reference to the treatment process of existing blackboard, pack into and bonding prismatic turning cylinder 2 in the boring of prismatic two ends, the turning cylinder of present embodiment is made with metal.Diameter of axle 10mm.With the metallic plate welding and the frame 3 that frames up, frame width is as the criterion with the prismatic number that need use, stretch out outside the framework end of prismatic turning cylinder, and turn-knob 4 is installed thereon, the detent mechanism of regular triangular prism is that the end at prism bores a blind hole, the compression spring of packing into earlier, reinstalling a steel ball that can slide in the hole or outer end is the pin of sphere, three pits are got in the relevant position on framework.The cylinder of each triangular prism constitutes three smooth plate faces when making alignment pin enter pit.
Above-mentioned each member assembling finishes, and can obtain the utility model product, during use when simultaneously writing when full, reverse turn-knob overturn all or part of plate face again running hand write.
Claims (2)
1, a kind of blackboard, the plate face that it is characterized in that blackboard are connected mutually by the cylinder of one group of regular triangular prism (1) and form, and adorn turning cylinder (2) on each regular triangular prism axis, and turning cylinder (2) is installed on the framework (3) side by side.
2,, it is characterized in that there is turn-knob (4) end that regular triangular prism turning cylinder (2) stretches out framework (3) according to the blackboard of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02209936 CN2518699Y (en) | 2002-01-25 | 2002-01-25 | Blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02209936 CN2518699Y (en) | 2002-01-25 | 2002-01-25 | Blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2518699Y true CN2518699Y (en) | 2002-10-30 |
Family
ID=33690242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02209936 Expired - Fee Related CN2518699Y (en) | 2002-01-25 | 2002-01-25 | Blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2518699Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862952A (en) * | 2014-02-21 | 2014-06-18 | 湖北工业大学 | Triangular prism blackboard capable of overturning and translating |
| CN104070890A (en) * | 2014-07-10 | 2014-10-01 | 苏州工业职业技术学院 | White board with three sides capable of being turned |
| CN104494335A (en) * | 2014-12-19 | 2015-04-08 | 吉林大学 | Turnover type blackboard |
-
2002
- 2002-01-25 CN CN 02209936 patent/CN2518699Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862952A (en) * | 2014-02-21 | 2014-06-18 | 湖北工业大学 | Triangular prism blackboard capable of overturning and translating |
| CN103862952B (en) * | 2014-02-21 | 2015-11-18 | 湖北工业大学 | A kind of turning triangular prism blackboard with translation |
| CN104070890A (en) * | 2014-07-10 | 2014-10-01 | 苏州工业职业技术学院 | White board with three sides capable of being turned |
| CN104494335A (en) * | 2014-12-19 | 2015-04-08 | 吉林大学 | Turnover type blackboard |
| CN104494335B (en) * | 2014-12-19 | 2016-04-13 | 吉林大学 | Turnover blackboard |
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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 |