CN201291683Y - Novel compasses special for blackboard - Google Patents
Novel compasses special for blackboard Download PDFInfo
- Publication number
- CN201291683Y CN201291683Y CNU2008201923343U CN200820192334U CN201291683Y CN 201291683 Y CN201291683 Y CN 201291683Y CN U2008201923343 U CNU2008201923343 U CN U2008201923343U CN 200820192334 U CN200820192334 U CN 200820192334U CN 201291683 Y CN201291683 Y CN 201291683Y
- Authority
- CN
- China
- Prior art keywords
- fixed
- blackboard
- compass
- novel
- rotating shaft
- 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 an educational affiliation, in particular to a novel compass specially used on blackboards. The novel compass comprises a graduated pole and a chalk sleeve; the novel compass is characterized in that: one end of the graduated pole is connected with a rotating shaft, a suction disc is fixed at the bottom part of the rotating shaft, a sliding sleeve is sheathed on the graduated pole, and the chalk sleeve is fixed on the sliding sleeve. The novel compass has the advantages of simple structure and convenient usage; when being used, the compass can be fixed on the blackboard by the suction disc and the graduation is adjusted and is used for drawing, thereby effectively solving the problems that the existing compass can not be fixed and has inaccurate drawing.
Description
Technical field
The utility model relates to a kind of teaching aid, specifically a kind of new type blackboard special compasses.
Background technology
Compasses are a kind of very common teaching aids.Existing teaching splayed configuration compasses, just that general compasses system is big, but do not consider that blackboard is a straight plane of heavily fortified point, feasible rotation is got up very inconvenient, and syringe needle also difficulty be fixed on the blackboard fragile again blackboard, come again because radius of circle is to measure before mapping, and compasses itself can be loosening when mapping, makes mapping accurate inadequately, so be necessary to invent a kind of novel bow compass that is applicable to blackboard.
Summary of the invention
The purpose of this utility model is at the defective of existing educational compasses, and a kind of new type blackboard special compasses is provided, and it has solved and make circle inconvenience, coarse problem on blackboard.
The technical solution of the utility model is such full pattern: it comprises a scale bar and chalk sleeve, it is characterized in that: an end of scale bar is connected with rotating shaft, and the bottom of rotating shaft is fixed with sucker, is with sliding sleeve on the scale bar, is fixed with chalk sleeve on the sliding sleeve.
Advantage of the present utility model: simple in structure, easy to operate, only need during use to be fixed on the blackboard with sucker, mix up scale, can map, efficiently solve and can't fix, coarse problem of mapping.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in Figure 1, the utility model comprises a scale bar 1 and chalk sleeve 5, and an end of scale bar 1 is connected with rotating shaft 2, and the bottom of rotating shaft 2 is fixed with sucker 3, is with sliding sleeve 4 on the scale bar 1, and sliding sleeve 4 can move freely, and is fixed with chalk sleeve 5 on the sliding sleeve 4.
When the utility model uses, be fixed on the blackboard with sucker, also sliding sleeve radius of circle that adjustment is done slidably just compasses can not occur and slide on blackboard, the situation that compass shaft becomes flexible.
Claims (1)
1, a kind of new type blackboard special compasses, it comprises a scale bar and chalk sleeve, it is characterized in that: an end of scale bar is connected with rotating shaft, and the bottom of rotating shaft is fixed with sucker, is with sliding sleeve on the scale bar, is fixed with chalk sleeve on the sliding sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201923343U CN201291683Y (en) | 2008-11-12 | 2008-11-12 | Novel compasses special for blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201923343U CN201291683Y (en) | 2008-11-12 | 2008-11-12 | Novel compasses special for blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201291683Y true CN201291683Y (en) | 2009-08-19 |
Family
ID=41005145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201923343U Expired - Fee Related CN201291683Y (en) | 2008-11-12 | 2008-11-12 | Novel compasses special for blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201291683Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
-
2008
- 2008-11-12 CN CNU2008201923343U patent/CN201291683Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110816128A (en) * | 2019-11-20 | 2020-02-21 | 韩登利 | Special drawing device of higher mathematics |
| CN110816128B (en) * | 2019-11-20 | 2023-08-04 | 莱芜职业技术学院 | Drawing device special for higher mathematics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20101112 |