CN203165288U - Trigonometric function demo disc - Google Patents
Trigonometric function demo disc Download PDFInfo
- Publication number
- CN203165288U CN203165288U CN 201220486095 CN201220486095U CN203165288U CN 203165288 U CN203165288 U CN 203165288U CN 201220486095 CN201220486095 CN 201220486095 CN 201220486095 U CN201220486095 U CN 201220486095U CN 203165288 U CN203165288 U CN 203165288U
- Authority
- CN
- China
- Prior art keywords
- trigonometric function
- line
- line segment
- point
- segment bar
- 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 provides a box body. A rectangular coordinate system is arranged on the front. An original point O is fixed with a line OP (1). A point P is fixed with a line PA (2) which shifts with the movement of the line OP (1). By rotating a knob S (3) at the lower left of the box body, the line OP (1) rotates around the original point O and the line PA (2) moves. A driving shaft (4) and a driven shaft (6) are respectively at the positions of the knob (3) and the original point (O) in the box body, and the two shafts are connected through a transmission belt (5). By using the trigonometric function demo disc, the trigonometric function conditions of angles formed by the line OP (1) and the X axis in each quadrant can be visually explained, which deepens the impression of students and improves the teaching effect.
Description
Technical field:
The utility model relates to a kind of teaching aid, particularly a kind of middle school mathematics teaching aid-trigonometric function demonstration board.
Background technology:
Still do not have the trigonometric function teaching demonstration device in the market, when imparting knowledge to students this content, teacher can only draw at blackboard and explain that the student is beyond affordability.Use the utility model can demonstrate the each several part content of trigonometric function visual in imagely, brought convenience to teaching.
The utility model content:
The purpose of this utility model is in order to design a kind of middle school mathematics teaching aid simple in structure, easy to use-trigonometric function demonstration board.The purpose of this utility model is to realize according to following mode.The utility model is a casing.There is a coordinate system in its front, and the line segment bar OP (1) of 10 unit lengths is installed at initial point O place, and a line segment bar PA (2) that 10 unit lengths are also arranged that moves with line segment bar OP (1) motion is installed at P point place again.There is a knob (3) lower left of casing.Rotation knob (3), line segment bar OP (1) just rotates around the O point.Line segment bar PA (2) is also mobile thereupon.Knob (3) and initial point (O) must be answered respectively in casing main drive shaft (4) and driven shaft (5), connects with driving-belt (6) between the diaxon.Utilize its line segment bar OP (1) and X-axis trigonometric function situation at the angle that each quadrant is formed of can explaining visual in imagely.
Description of drawings:
Fig. 1 is the Facad structure synoptic diagram of trigonometric function demonstration board, wherein 1. line segment bar OP, 2. line segment bar PA, 3. knobs.
Fig. 2 is wherein 4. main drive shafts, 5. driven shaft, 6. driving-belt of trigonometric function demonstration board back side transmission structures synoptic diagram.
Embodiment:
As shown in drawings.The utility model is a casing, and there is a rectangular coordinate system in its front, is fixing the line segment bar OP (1) of 10 unit lengths at initial point O place.Fixing one again that move with line segment bar OP (1) motion also is the line segment bar PA (2) of 10 unit lengths at P point place.There is a knob (3) lower left of casing.Rotation knob (3), the line segment bar OP initial point O that just having mercy on rotates, and line segment bar PA (2) is also mobile thereupon.S point and O point present position have main drive shaft (4) and driven shaft (5) respectively in casing, connected by driving-belt between the diaxon.Utilize its line segment OP (1) and X-axis trigonometric function situation at the angle that each quadrant is formed of can explaining visual in imagely.
Claims (2)
1. the trigonometric function demonstration board comprises a casing, there is a rectangular coordinate system in the front that it is characterized in that it, initial point O place at coordinate system, the line segment bar OP (1) of 10 unit lengths is installed, O point, P point are two end points of line segment bar OP, the line segment bar PA (2) of 10 unit lengths is also installed at the place at another end points P of line segment bar OP point, and there is knob (3) lower left of casing.
2. the described trigonometric function demonstration board of claim 1 is characterized in that in initial point (O), knob (3) and the casing between corresponding respectively main drive shaft (4) and the driven shaft (5) driving-belt (6) connection being arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220486095 CN203165288U (en) | 2012-09-12 | 2012-09-12 | Trigonometric function demo disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220486095 CN203165288U (en) | 2012-09-12 | 2012-09-12 | Trigonometric function demo disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203165288U true CN203165288U (en) | 2013-08-28 |
Family
ID=49026455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220486095 Expired - Fee Related CN203165288U (en) | 2012-09-12 | 2012-09-12 | Trigonometric function demo disc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203165288U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730043A (en) * | 2013-11-29 | 2014-04-16 | 周维保 | Rectangular plane coordinate system presentation device |
| CN104794962A (en) * | 2015-04-06 | 2015-07-22 | 邬苏婷 | Apparatus for teaching demonstration of the angle |
-
2012
- 2012-09-12 CN CN 201220486095 patent/CN203165288U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730043A (en) * | 2013-11-29 | 2014-04-16 | 周维保 | Rectangular plane coordinate system presentation device |
| CN104794962A (en) * | 2015-04-06 | 2015-07-22 | 邬苏婷 | Apparatus for teaching demonstration of the angle |
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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: 20130828 Termination date: 20140912 |
|
| EXPY | Termination of patent right or utility model |