CN202528688U - Novel compasses for blackboard - Google Patents
Novel compasses for blackboard Download PDFInfo
- Publication number
- CN202528688U CN202528688U CN2012201769563U CN201220176956U CN202528688U CN 202528688 U CN202528688 U CN 202528688U CN 2012201769563 U CN2012201769563 U CN 2012201769563U CN 201220176956 U CN201220176956 U CN 201220176956U CN 202528688 U CN202528688 U CN 202528688U
- Authority
- CN
- China
- Prior art keywords
- blackboard
- ruler
- compasses
- chalk
- slide block
- 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 relates to novel compasses for a blackboard. The novel compasses for the blackboard comprise a straight ruler with scale, wherein a chalk mounting device is arranged on the straight ruler in a sliding mode; a spherical universal joint is arranged at one end of the straight ruler; and the spherical universal joint is connected with a suction disc. Based on the spherical universal joint, the straight ruler can rotate randomly; based on the suction disc, the novel compasses can be fixed on the blackboard; the round is drawn quickly by adjusting the position of the chalk mounting device according to the size of the round to be drawn; and the novel compasses are simple and convenient to use.
Description
Technical field
The utility model relates to a kind of teaching aid, relates to a kind of blackboard specifically and uses compasses.
Background technology
The present compasses of teaching usefulness, use pretty troublesome, bad fixingly slide easily on blackboard, teacher operates harder, and the circle of drawing is not a standard very.
The utility model content
The problem that the utility model will solve is to above problem, provides a kind of and can draw round new type blackboard fast and use compasses.
For addressing the above problem; The technical scheme that the utility model adopted is: new type blackboard is used compasses, comprises the ruler of being with scale, is slidingly fitted with the chalk erecting device on the said ruler; One end of said ruler is provided with universal ball joint, and said universal ball joint is connected with sucker.
As a kind of improvement, said chalk erecting device comprises the slide block that is slidingly mounted on the said ruler, and said slide block is provided with the chalk geometrical clamp near an end of blackboard, and the center of said slide block indicates index line.
The utility model is taked above technical scheme; Have the following advantages: new type blackboard is used compasses, comprises the ruler of being with scale, is slidingly fitted with the chalk erecting device on the said ruler; One end of said ruler is provided with universal ball joint, and said universal ball joint is connected with sucker; Being provided with of universal ball joint can let ruler arbitrarily rotate, and being provided with of sucker can let the utility model be fixed on the blackboard, according to the size of the circle of required picture, regulates the position of chalk erecting device, draws circle and get final product, and it is quick to draw circle, and uses simple and convenient.
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Description of drawings
Accompanying drawing is the structural representation of the utility model embodiment.
Among the figure: the 1-ruler; 2-chalk erecting device; The 21-slide block; 22-chalk geometrical clamp; The 23-index line; The 3-universal ball joint; The 4-sucker.
The specific embodiment
Embodiment: new type blackboard is used compasses, comprises the ruler 1 of being with scale, is slidingly fitted with chalk erecting device 2 on the said ruler 1, and an end of said ruler 1 is provided with universal ball joint 3, and said universal ball joint 3 is connected with sucker 4; Said chalk erecting device 2 comprises the slide block 21 that is slidingly mounted on the said ruler 1, and said slide block 21 is provided with chalk geometrical clamp 22 near an end of blackboard, and the center of said slide block 21 indicates index line 23.Being provided with of universal ball joint 3 can let ruler 1 arbitrarily rotate; Being provided with of sucker 4 can let the utility model be fixed on the blackboard, according to the size of the circle of required picture, regulates the position of chalk erecting device 2; With the scale on the index line 23 aligning rulers 1 of slide block 21; Draw circle and get final product, draw circle fast, and use simple and convenient.
Claims (2)
1. new type blackboard is used compasses, comprises the ruler of being with scale, is slidingly fitted with the chalk erecting device on the said ruler, it is characterized in that: an end of said ruler is provided with universal ball joint, and said universal ball joint is connected with sucker.
2. new type blackboard as claimed in claim 1 is used compasses, it is characterized in that: said chalk erecting device comprises the slide block that is slidingly mounted on the said ruler, and said slide block is provided with the chalk geometrical clamp near an end of blackboard, and the center of said slide block indicates index line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201769563U CN202528688U (en) | 2012-04-18 | 2012-04-18 | Novel compasses for blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201769563U CN202528688U (en) | 2012-04-18 | 2012-04-18 | Novel compasses for blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202528688U true CN202528688U (en) | 2012-11-14 |
Family
ID=47129891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201769563U Expired - Fee Related CN202528688U (en) | 2012-04-18 | 2012-04-18 | Novel compasses for blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202528688U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106626906A (en) * | 2016-12-30 | 2017-05-10 | 徐书晗 | Multi-fixed-point compass assembly for teaching |
-
2012
- 2012-04-18 CN CN2012201769563U patent/CN202528688U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106626906A (en) * | 2016-12-30 | 2017-05-10 | 徐书晗 | Multi-fixed-point compass assembly for teaching |
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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: 20121114 Termination date: 20130418 |