CN202373207U - Triangle demonstration aid - Google Patents
Triangle demonstration aid Download PDFInfo
- Publication number
- CN202373207U CN202373207U CN2011205552927U CN201120555292U CN202373207U CN 202373207 U CN202373207 U CN 202373207U CN 2011205552927 U CN2011205552927 U CN 2011205552927U CN 201120555292 U CN201120555292 U CN 201120555292U CN 202373207 U CN202373207 U CN 202373207U
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- CN
- China
- Prior art keywords
- bar
- triangle
- model
- utility
- rod member
- 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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- Electrically Operated Instructional Devices (AREA)
Abstract
The utility model relates to a triangle demonstration aid, which comprises three side bars, wherein each side bar comprises a first bar and a second bar, the middle of the first bar is provided with a slide way, one end of the second bar is mounted in the slide way through a bolt, the first bar and the second bar are provided with scales, and the side bars are articulated with one another through pin shafts. The lengths of the three side bars of the triangle demonstration aid can be adjusted, so that the size and the shape of a formed triangle can be changed according to needs, teaching demonstration is visual, and the teaching effect is good.
Description
Technical field
The utility model relates to a kind of mathematics teaching aid, is specifically related to a kind of triangle demonstration instrument for teaching.
Background technology
Have many in the current mathematical education about leg-of-mutton knowledge; Like leg-of-mutton size, shape, area, three frontier juncture systems etc.; But saying that most dependence of class hour is drawn or oral account is described; Because there is not to change at any time the triangle demonstration teaching aid of size, shape, so directly perceived, teaching efficiency is bad.
The utility model content
The purpose of the utility model is to above-mentioned deficiency, and a kind of triangle demonstration teaching aid is provided, and can change size, shape as required.
The purpose of the utility model realizes through following technological means: comprise three side rods that are hinged by bearing pin; Side rod is made up of two rod members that have scale mark; Wherein in the middle of a rod member chute is arranged, another rod member one end is installed in the chute through screw.
Compared with prior art the utlity model has following tangible advantage: three side rod length can be regulated; Therefore the leg-of-mutton size that is constituted; Shape can change as required, directly reads the leg-of-mutton length of side from the scale mark on each limit, and demonstrating visual, teaching efficiency are good.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Among the figure, 1-rod member one, 2-chute, 3-screw, 4-scale mark, 5-rod member two, 6-bearing pin.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is done further to describe in detail:
Triangle demonstration teaching aid as shown in Figure 1; Comprise three side rods that are made up of rod member 1 and rod member 25, in the middle of the rod member 1 chute 2 is arranged, an end of rod member 25 is installed in the chute 2 through screw 3; Rod member 1 and rod member 25 are provided with scale mark 4, and be hinged through bearing pin 6 between the side rod.
In a word, the utility model provides a kind of demonstrating visual, triangle demonstration teaching aid that teaching efficiency is good.The above; Be merely a part of embodiment of the utility model; The protection domain of the utility model is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.
Claims (1)
1. triangle demonstration teaching aid; Comprise three side rods that are hinged by bearing pin; It is characterized in that: said side rod is made up of two rod members that have scale mark, in the middle of the said rod member chute is arranged, and said rod member one end of another is installed in the said chute through screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205552927U CN202373207U (en) | 2011-12-23 | 2011-12-23 | Triangle demonstration aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205552927U CN202373207U (en) | 2011-12-23 | 2011-12-23 | Triangle demonstration aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202373207U true CN202373207U (en) | 2012-08-08 |
Family
ID=46596902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205552927U Expired - Fee Related CN202373207U (en) | 2011-12-23 | 2011-12-23 | Triangle demonstration aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202373207U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499263A (en) * | 2013-09-29 | 2014-01-08 | 扬州大洋造船有限公司 | Positioning survey tool for bulk cargo ship folding hole longitudinal |
| CN105810051A (en) * | 2016-05-24 | 2016-07-27 | 段贤清 | Triangular prism, triangular prismoid and triangular pyramid dynamic teaching aid |
| CN106023731A (en) * | 2016-07-21 | 2016-10-12 | 安徽省宿州市第二中学 | Teaching aid for rotation demonstration of rotating body |
-
2011
- 2011-12-23 CN CN2011205552927U patent/CN202373207U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499263A (en) * | 2013-09-29 | 2014-01-08 | 扬州大洋造船有限公司 | Positioning survey tool for bulk cargo ship folding hole longitudinal |
| CN105810051A (en) * | 2016-05-24 | 2016-07-27 | 段贤清 | Triangular prism, triangular prismoid and triangular pyramid dynamic teaching aid |
| CN105810051B (en) * | 2016-05-24 | 2019-01-08 | 段贤清 | A kind of triangular prism triangular platform triangular pyramid dynamic teaching aid |
| CN106023731A (en) * | 2016-07-21 | 2016-10-12 | 安徽省宿州市第二中学 | Teaching aid for rotation demonstration of rotating body |
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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: 20120808 Termination date: 20121223 |