CN204066515U - Polygon demonstration realia - Google Patents
Polygon demonstration realia Download PDFInfo
- Publication number
- CN204066515U CN204066515U CN201420533450.2U CN201420533450U CN204066515U CN 204066515 U CN204066515 U CN 204066515U CN 201420533450 U CN201420533450 U CN 201420533450U CN 204066515 U CN204066515 U CN 204066515U
- Authority
- CN
- China
- Prior art keywords
- rubber grommet
- sleeve pipe
- endoporus
- polygon
- sleeve
- 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
Links
Abstract
A kind of polygon demonstration realia, comprise rubber grommet, rubber grommet is one section of annular enclosed pipe, pressurized air is filled with in rubber grommet, in the tube outer diameter of rubber grommet, cover has three to four sleeve pipes, the endoporus of sleeve pipe and the external diameter of rubber grommet are that clearance fit is connected, and the endoporus of sleeve pipe is the turnover of multiple angles, and the outer cylinder surface of rubber grommet is coated with equidistant scale.Sleeve pipe is that two halves docking forms, the endoporus of sleeve pipe is respectively 120 °, 90 °, 60 °, 45 ° knuckles, be enclosed within rubber grommet by three to four sleeve combination of different angles to be combined into difform polygon, be convenient to classmates and understand rectangle, trapezoidal, right-angle triangle, common leg-of-mutton concept intuitively, difform area formula etc. is understood by the contrast of scale, contribute to the understanding of classmates for polygon basic knowledge point, favourablely to promote the use of.
Description
Technical field
The utility model relates to teaching apparatus for primary school maths field, specifically a kind of polygon demonstration realia.
Background technology
Inside primary school mathematics class about rectangle and trapezoidal between relation, relation between right-angle triangle and common triangle, shape conversion such as between them, relation between area, it is the elusive problem of students, what main problem was books are drawn is each figure placed respectively, and rectangle can not be represented intuitively how to be changed to trapezoidal, how their straight flange and height are changed, classmates can not produce deep impression in brain, thus can not understand basic knowledge point better.
Utility model content
The purpose of this utility model is to provide a kind of polygon demonstration realia, demonstrates the shape conversion between different polygon more intuitively.
The technical solution of the utility model is: this polygon demonstration realia comprises rubber grommet, rubber grommet is one section of annular enclosed pipe, pressurized air is filled with in rubber grommet, in the tube outer diameter of rubber grommet, cover has three to four sleeve pipes, the endoporus of sleeve pipe and the external diameter of rubber grommet are that clearance fit is connected, the endoporus of sleeve pipe is the turnover of multiple angles, and the outer cylinder surface of rubber grommet is coated with equidistant scale.
Sleeve pipe is that two halves docking forms, and the endoporus of sleeve pipe is respectively 120 °, 90 °, 60 °, 45 ° knuckles, is enclosed within rubber grommet by three to four sleeve combination of different angles to be combined into difform polygon.
The utility model passes through in rubber grommet, be socketed different angles, the sliding sleeve of varying number can form difform polygon, be convenient to classmates and understand rectangle, trapezoidal, right-angle triangle, common leg-of-mutton concept intuitively, difform area formula etc. is understood by the contrast of scale, contribute to the understanding of classmates for polygon basic knowledge point, favourablely to promote the use of.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is another kind of structural representation of the present utility model.
Fig. 3 is the third structural representation of the present utility model.
Embodiment
Shown in Fig. 1 composition graphs 2 ~ 3, this polygon demonstration realia comprises rubber grommet 1, rubber grommet 1 is one section of annular enclosed pipe, pressurized air is filled with in rubber grommet 1, the intensity that pressurized air makes rubber grommet 1 keep certain, on the external diameter of rubber grommet 1, cover has three to four sleeve pipes 2, endoporus and the external diameter of rubber grommet 1 of sleeve pipe 2 are that clearance fit is connected, the endoporus of sleeve pipe 2 is for being 120 °, 90 °, 60 °, the turnover of 45 ° of knuckles, sleeve pipe 2 is docked by two halves and forms, be convenient to install and remove in rubber grommet 1, at rubber grommet 1 place of sleeve pipe 2 process, rubber grommet 1 is transferred, form polygon, the outer cylinder surface of rubber grommet 1 is coated with equidistant scale 3, scale 3 contribute to intuitivism apprehension conversion polygonal time, how polygonal limit changes and Changing Pattern.Figure shown in Fig. 1 is socketed in by the sleeve pipe 2 of 4 90 ° of knuckles situation rubber grommet 1 being formed rectangle; Figure shown in Fig. 2 is socketed in by the sleeve pipe 2 of sleeve pipe 2 and 1 60 ° of knuckle of sleeve pipe 2,1 120 ° of knuckle of 2 90 ° of knuckles situation rubber grommet 1 being formed right-angled trapezium; Figure shown in Fig. 3 is socketed in by the sleeve pipe 2 of sleeve pipe 2 and 1 60 ° of knuckle of sleeve pipe 2,1 30 ° of knuckle of 1 90 ° of knuckle situation rubber grommet 1 being formed right-angle triangle.The sleeve pipe 2 of varying number, different endoporus knuckle is socketed in rubber grommet 1 and forms difform polygon, will not enumerate.
Claims (2)
1. a polygon demonstration realia, comprise rubber grommet (1), it is characterized in that: rubber grommet (1) is one section of annular enclosed pipe, rubber grommet is filled with pressurized air in (1), on the external diameter of rubber grommet (1), cover has three to four sleeve pipes (2), the endoporus of sleeve pipe (2) is that clearance fit is connected with the external diameter of rubber grommet (1), and the endoporus of sleeve pipe (2) is the turnover of multiple angles, the outer cylinder surface of rubber grommet (1) is coated with equidistant scale (3).
2. polygon demonstration realia according to claim 1, is characterized in that: sleeve pipe (2) forms for two halves dock, and the endoporus of sleeve pipe is respectively 120 °, 90 °, 60 °, 45 ° knuckles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533450.2U CN204066515U (en) | 2014-09-17 | 2014-09-17 | Polygon demonstration realia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533450.2U CN204066515U (en) | 2014-09-17 | 2014-09-17 | Polygon demonstration realia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204066515U true CN204066515U (en) | 2014-12-31 |
Family
ID=52207975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420533450.2U Expired - Fee Related CN204066515U (en) | 2014-09-17 | 2014-09-17 | Polygon demonstration realia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204066515U (en) |
-
2014
- 2014-09-17 CN CN201420533450.2U patent/CN204066515U/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 |
Granted publication date: 20141231 Termination date: 20190917 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |