CN201009594Y - Compasses for blackboard - Google Patents
Compasses for blackboard Download PDFInfo
- Publication number
- CN201009594Y CN201009594Y CNU2007200189926U CN200720018992U CN201009594Y CN 201009594 Y CN201009594 Y CN 201009594Y CN U2007200189926 U CNU2007200189926 U CN U2007200189926U CN 200720018992 U CN200720018992 U CN 200720018992U CN 201009594 Y CN201009594 Y CN 201009594Y
- Authority
- CN
- China
- Prior art keywords
- compasses
- blackboard
- locating shaft
- arm
- fixed
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a teaching appliance, which comprises a locating axis and a compass arm which can rotate around the locating axis, and the compass arm is provided with a sheath for a chalk which is slip, one end of the locating axis is fixed with an acetabula, and the other end of the locating axis is fixed with a magnet block. The utility model has simple structure, and can be located on blackboards of different properties respectively by the acetabula and the magnet block at the two ends of the locating axis, and has good locating effect, so as to make drawing more standard and bring convenience to teaching.
Description
Technical field
The utility model relates to a kind of teaching aid, relates in particular to a kind of blackboard compasses.
Background technology
Compasses are very important drawing appliance in teaching, the compasses of general teaching usefulness all comprise angle and movable pin, movable pin can rotate around angle, on the movable pin chalk is installed, existing angle generally all is the draw point shape, this compasses are more convenient at the paper upper drawing circle, but the compasses of this teaching usefulness are at glass, wooden, plastics, skid easily on the blackboard of cement character or the magnetite character blackboard, the center of circle can't well be located, and can also destroy the blackboard material, on the blackboard of teaching, use wearing and tearing blackboard easily, because the location is inaccurate, the compasses that the teacher uses all are difficult to the standard with diagram plots, bring very big difficulty to teaching.
The utility model content
Technical problem to be solved in the utility model provides a kind of simple in structure, is convenient to the blackboard compasses of locating on the various material blackboard.
For solving the problems of the technologies described above, the technical solution of the utility model is: the blackboard compasses, comprise locating shaft and the compasses arm that can rotate around described locating shaft, described compasses arm is provided with slidably chalk sleeve, one end of described locating shaft is fixed with sucker, and the other end of described locating shaft is fixed with magnet piece.
As a kind of improvement, described compasses arm is provided with scale.
Owing to adopted technique scheme, the blackboard compasses comprise locating shaft and the compasses arm that can rotate around described locating shaft, and described compasses arm is provided with slidably chalk sleeve, one end of described locating shaft is fixed with sucker, and the other end of described locating shaft is fixed with magnet piece.The utility model is relatively simple for structure, can on the blackboard of various material, use, as adopting sucker on the blackboards such as glass, plastics, cement, make its center of circle positioning stablity, and on magnetic blackboard, can use magnet piece, it is adsorbed on the blackboard, locate also relatively good, the teacher is more convenient in teaching, draws the circle standard of comparison, has improved efficiency of teaching.
Description of drawings
Accompanying drawing is the structural representation of the utility model embodiment.
The specific embodiment
As shown in the figure, the blackboard compasses comprise locating shaft 1 and the compasses arm 2 that can rotate around described locating shaft 1, and described compasses arm 2 is provided with slidably chalk sleeve 3, one end of described locating shaft 1 is fixed with sucker 4, and the other end of described locating shaft 1 is fixed with magnet piece 5.Described compasses arm 2 is provided with scale 6, is provided with chalk sleeve locking device 7 between described chalk sleeve 3 and the described compasses arm 2.
In use, can select with which end according to the material of blackboard be positioning end, if be magnetic, can adopt magnet piece 5 as the center of circle, location, to put into chalk in the chalk sleeve on the compasses arm 23, because compasses arm 2 is provided with scale 6, can be slid on the needed scale 6 by slip chalk sleeve 3, it be clamped, then by rotation compasses arm 2 circle that radius do not wait that draws by chalk sleeve locking device 7, simply, convenient, and because compasses arm 2 is provided with scale 6, also can be used as ruler and use, and if be glass, character such as cement, can it firmly be inhaled on blackboard by an end of band sucker 4, also make things convenient for the location in the center of circle.
The utility model is relatively simple for structure, can locate on blackboard of different nature respectively by the sucker 4 and the magnet piece 5 at locating shaft 1 two ends, and good positioning effect has been brought convenience to teaching.
Claims (3)
1. blackboard compasses, comprise locating shaft (1) and the compasses arm (2) that can rotate around described locating shaft (1), described compasses arm (2) is provided with slidably chalk sleeve (3), it is characterized in that: an end of described locating shaft (1) is fixed with sucker (4), and the other end of described locating shaft (1) is fixed with magnet piece (5).
2. blackboard compasses as claimed in claim 1 is characterized in that: described compasses arm (2) is provided with scale (6).
3. blackboard compasses as claimed in claim 1 is characterized in that: be provided with chalk sleeve locking device (7) between described chalk sleeve (3) and the described compasses arm (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200189926U CN201009594Y (en) | 2007-03-03 | 2007-03-03 | Compasses for blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200189926U CN201009594Y (en) | 2007-03-03 | 2007-03-03 | Compasses for blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201009594Y true CN201009594Y (en) | 2008-01-23 |
Family
ID=39044530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200189926U Expired - Fee Related CN201009594Y (en) | 2007-03-03 | 2007-03-03 | Compasses for blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201009594Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922503A (en) * | 2012-10-12 | 2013-02-13 | 新兴铸管股份有限公司 | Cantilever type circular arc marking device |
| CN104742606A (en) * | 2015-03-17 | 2015-07-01 | 张懿孜 | Multi-functional combined ruler |
| CN105774332A (en) * | 2016-05-13 | 2016-07-20 | 安庆师范学院 | Novel multifunctional teaching compasses |
-
2007
- 2007-03-03 CN CNU2007200189926U patent/CN201009594Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922503A (en) * | 2012-10-12 | 2013-02-13 | 新兴铸管股份有限公司 | Cantilever type circular arc marking device |
| CN104742606A (en) * | 2015-03-17 | 2015-07-01 | 张懿孜 | Multi-functional combined ruler |
| CN105774332A (en) * | 2016-05-13 | 2016-07-20 | 安庆师范学院 | Novel multifunctional teaching compasses |
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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: 20080123 |