CN202557095U - Telescopic portable teaching compasses - Google Patents
Telescopic portable teaching compasses Download PDFInfo
- Publication number
- CN202557095U CN202557095U CN2011205481137U CN201120548113U CN202557095U CN 202557095 U CN202557095 U CN 202557095U CN 2011205481137 U CN2011205481137 U CN 2011205481137U CN 201120548113 U CN201120548113 U CN 201120548113U CN 202557095 U CN202557095 U CN 202557095U
- Authority
- CN
- China
- Prior art keywords
- dwang
- sliding support
- sucker
- compasses
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses telescopic portable teaching compasses, comprising a sucker, a rotating shaft arranged on the back of the sucker, a turning rod fixed on the rotating shaft, a sliding support arranged on the turning rod, and a chalk sleeve arranged on the sliding support. The teaching compasses having the aforementioned structure do not shift places or cause harm to a blackboard.
Description
Technical field
The utility model relates to educational compasses.
Background technology
Now, teacher is to adopt traditional compasses at the blackboard upper drawing circle at school the time.Its shortcoming is: for centering, the centering pin of compasses can stay hole on blackboard, therefore, can damage blackboard, in addition, is drawing bowlder, and the centering pin of compasses moves easily, therefore, comes difficulty and trouble can for the picture round belt.
Summary of the invention
The purpose of the utility model provides and a kind ofly can not be shifted, and does not damage the scalable portable educational compasses of blackboard.
For achieving the above object, the technical scheme of the utility model is: scalable portable educational compasses, comprise sucker, and the back side of sucker is provided with rotating shaft, is fixed with dwang on the rotating shaft, and dwang is provided with sliding support, and sliding support is provided with chalk sleeve.
The beneficial effect of the utility model is: because compasses are to be adsorbed on the blackboard through sucker, therefore, be not easy to occur the phenomenon of compasses displacement, the phenomenon of blackboard also can not occur damaging; Because sliding support is slidably on dwang, therefore, can draw is being the circle of radius with interior all size with dwang length; Owing to be provided with chalk sleeve, therefore, be convenient to the clamping chalk.
Description of drawings
Fig. 1 is the structure chart of the utility model.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is further elaborated.
As shown in Figure 1, scalable portable educational compasses comprises sucker 1, rotating shaft 2, dwang 3, sliding support 4, chalk sleeve 5 and vinyl cover 6.Rotating shaft 2 is installed on the sucker 1, and when sucker 1 fixedly the time, rotating shaft 2 is free to rotation; One end of dwang 3 is connected on the rotating shaft 2, and the other end is a free end, and the upper end of dwang 3 is provided with vinyl cover; Sliding support 4 is enclosed within on the dwang 3, and can on dwang 3, slide; Chalk sleeve 5 dismountable being located on the sliding support 4 are used for the clamping chalk.Described sliding support 4 is provided with the fixed screw (not shown), on dwang 3, is provided with scale.
In use, unclamp fixed screw earlier, according to the size of circle; Sliding support 4 is moved on the corresponding scale, and then, screw is locked; Prevent that sliding support 4 from sliding on dwang 3, then, with the chalk clamping to chalk sleeve 5; Then, sucker 1 is adsorbed on the blackboard, rotation dwang 3 can the picture circle.
This structure because compasses are to be adsorbed on the blackboard through sucker, therefore, is not easy to occur the phenomenon of compasses displacement, the phenomenon of blackboard also can not occur damaging; Because sliding support is slidably on dwang, therefore, can draw is being the circle of radius with interior all size with dwang length; Owing to be provided with chalk sleeve, therefore, be convenient to the clamping chalk; Owing to be provided with scale, therefore, under the situation that does not need other measurers, can confirm radius of a circle accurately.
Claims (4)
1. scalable portable educational compasses is characterized in that: comprise sucker, the back side of sucker is provided with rotating shaft, is fixed with dwang on the rotating shaft, and dwang is provided with sliding support, and sliding support is provided with chalk sleeve.
2. scalable portable educational compasses according to claim 1, it is characterized in that: sliding support is provided with fixed screw.
3. scalable portable educational compasses according to claim 1, it is characterized in that: the upper end of dwang is provided with vinyl cover.
4. scalable portable educational compasses according to claim 1, it is characterized in that: dwang is provided with scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205481137U CN202557095U (en) | 2011-12-26 | 2011-12-26 | Telescopic portable teaching compasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205481137U CN202557095U (en) | 2011-12-26 | 2011-12-26 | Telescopic portable teaching compasses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202557095U true CN202557095U (en) | 2012-11-28 |
Family
ID=47206789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205481137U Expired - Fee Related CN202557095U (en) | 2011-12-26 | 2011-12-26 | Telescopic portable teaching compasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202557095U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950324A (en) * | 2014-04-30 | 2014-07-30 | 电子科技大学 | Portable four-degree-of-freedom teaching compass |
| CN108973453A (en) * | 2018-06-29 | 2018-12-11 | 王小兰 | A kind of compasses and its application method for blackboard upper drawing circle |
-
2011
- 2011-12-26 CN CN2011205481137U patent/CN202557095U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950324A (en) * | 2014-04-30 | 2014-07-30 | 电子科技大学 | Portable four-degree-of-freedom teaching compass |
| CN108973453A (en) * | 2018-06-29 | 2018-12-11 | 王小兰 | A kind of compasses and its application method for blackboard upper drawing circle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20141226 |
|
| EXPY | Termination of patent right or utility model |