CN202413134U - Circle drawing machine for math teaching - Google Patents
Circle drawing machine for math teaching Download PDFInfo
- Publication number
- CN202413134U CN202413134U CN2012200386075U CN201220038607U CN202413134U CN 202413134 U CN202413134 U CN 202413134U CN 2012200386075 U CN2012200386075 U CN 2012200386075U CN 201220038607 U CN201220038607 U CN 201220038607U CN 202413134 U CN202413134 U CN 202413134U
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- CN
- China
- Prior art keywords
- circle
- rod
- drawing machine
- sliding ring
- positioning
- 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 discloses a circle drawing machine for math teaching. The circle drawing machine comprises a positioning rod, wherein a suction disk is arranged at the lower end of the positioning rod; a bearing is arranged at the upper end of the positioning rod; a measurement rod perpendicular to the positioning rod is arranged on one side of the bearing; a scale line is formed on the measurement rod; a sliding ring is sleeved on the measurement rod; an operation rod parallel to the positioning rod is arranged at the lower end of the sliding ring; a positioning screw is arranged at the upper end of the sliding ring; and a chalk sleeve is arranged at the lower end of the operation rod. The circle drawing machine has the outstanding advantage of simple structure; when the circle drawing machine is used, the suction disk is fixed at the circle center of a circle to be drawn; the sliding ring slides to a proper position on the measurement rod according to the radius of the circle to be drawn and the scale line on the measurement rod and is fixed by the positioning screw at the upper end; and therefore, a teacher can hold the sliding ring and rotate the sliding ring around the positioning rod to draw a circle. The circle drawing machine is convenient to use; the positioning rod is firm in fixation; the radius of the circle to be drawn can be controlled accurately; and the teaching quality is greatly improved.
Description
Technical field:
The utility model relates to draws circular device, and particularly a kind of mathematical education is used cyclograph.
Background technology:
At present; Math teacher often need use common compasses at the blackboard upper drawing circle usually in teaching process, because the iron pin on the compasses leg is fixing insecure on smooth plate face; Usually skid, misplace; Wayward, and can't control the circular radius of drawing accurately, use very inconvenient.
Summary of the invention:
The purpose of the utility model is to overcome the shortcoming that exists in the prior art, and the mathematical education that provides the circular radius of a kind of simple in structure, easy to use, fixation and drafting accurately to control is used cyclograph.
To achieve these goals, the utility model provides a kind of mathematical education to use cyclograph, comprises backstay; The lower end of said backstay is provided with sucker; The upper end of said backstay is provided with bearing, and a side of said bearing is provided with the measuring stick vertical with said backstay, and said measuring stick is provided with graduation mark; Be socketed with slip ring on the said measuring stick; The lower end of said slip ring is provided with the action bars parallel with said backstay, and the upper end of said slip ring is provided with dog screw, and the lower end of said action bars is provided with the chalk sleeve.
The outstanding advantage of the utility model is: simple in structure, during use, sucker is fixed to the circle centre position that circle will be drawn by institute; Draw circular radius and the graduation mark on the measuring stick then as required, slip ring is slided moves to the suitable position of measuring stick, utilizes the dog screw of upper end to fix; Can hold slip ring and rotate around backstay, draw the circle that will draw, easy to use; The backstay fixation; And the radius of the circle that will draw can control accurately, improve the quality of teaching greatly, teaching efficiency obviously is superior to existing compasses.
Description of drawings:
Fig. 1 is the overall structure front view of the utility model embodiment.
The specific embodiment:
Design agents mechanism comprised sucker 1, backstay 2, bearing 3, measuring stick 4, graduation mark 5, slip ring 6, dog screw 7, action bars 8 and chalk sleeve 9 when the embodiment of the utility model implemented.Wherein, the lower end of backstay 2 is provided with sucker 1, and the upper end of backstay 2 is provided with bearing 3; One side of bearing 3 is provided with the measuring stick 4 vertical with backstay 2; Measuring stick 4 is provided with graduation mark 5, is socketed with slip ring 6 on the measuring stick 4, and the lower end of slip ring 6 is provided with the action bars 8 parallel with backstay 2; The upper end of slip ring 6 is provided with dog screw 7, and the lower end of action bars 8 is provided with chalk sleeve 9.
Claims (1)
1. a mathematical education is used cyclograph, it is characterized in that, comprises backstay; The lower end of said backstay is provided with sucker; The upper end of said backstay is provided with bearing, and a side of said bearing is provided with the measuring stick vertical with said backstay, and said measuring stick is provided with graduation mark; Be socketed with slip ring on the said measuring stick; The lower end of said slip ring is provided with the action bars parallel with said backstay, and the upper end of said slip ring is provided with dog screw, and the lower end of said action bars is provided with the chalk sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200386075U CN202413134U (en) | 2012-01-29 | 2012-01-29 | Circle drawing machine for math teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200386075U CN202413134U (en) | 2012-01-29 | 2012-01-29 | Circle drawing machine for math teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202413134U true CN202413134U (en) | 2012-09-05 |
Family
ID=46737922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200386075U Expired - Fee Related CN202413134U (en) | 2012-01-29 | 2012-01-29 | Circle drawing machine for math teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202413134U (en) |
-
2012
- 2012-01-29 CN CN2012200386075U patent/CN202413134U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20130129 |