CN201845463U - Novel variable instrument - Google Patents
Novel variable instrument Download PDFInfo
- Publication number
- CN201845463U CN201845463U CN2010205170538U CN201020517053U CN201845463U CN 201845463 U CN201845463 U CN 201845463U CN 2010205170538 U CN2010205170538 U CN 2010205170538U CN 201020517053 U CN201020517053 U CN 201020517053U CN 201845463 U CN201845463 U CN 201845463U
- Authority
- CN
- China
- Prior art keywords
- full circle
- shaped hole
- long strip
- utility
- variable instrument
- 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 discloses a variable instrument which belongs to the field of a mathematics teaching aid and comprises a full circle angle gauge. The periphery of the full circle angle gauge is provided with angle scale lines, the center of the full circle angle gauge is connected with a straight ruler by a rotating shaft, a long strip-shaped hole is arranged in the middle of the straight ruler, length scale lines are arranged at the two edges of the long strip-shaped hole, and the rotating shaft can move along the long strip-shaped hole. The variable instrument has simple structure, is convenient to use and can be combined into various geometric figures at will for teaching demonstration.
Description
Technical field
The utility model relates to the mathematics teaching aid field, especially a kind of changeable instrument.
Background technology
In present mathematical education, the teacher often needs different teaching aids to demonstrate, because teaching aid quantity is too many, preserve and put and all need a lot of spaces, and carry also inconvenient, so the teacher is difficult to demonstrate to the student one by one, influences the student like this to geometric understanding, and then influences quality of instruction.
The utility model content
Technical assignment of the present utility model is that the deficiency at above-mentioned technology provides a kind of and can combination in any demonstrate various geometric changeable instrument.
The purpose of this utility model is achieved by following proposal: a kind of changeable instrument, the full circle protractor that comprises peripheral band angle index line, full circle protractor center is connected by the ruler of rotation axis with middle belt length cylindrical void, and there is the length scale mark on the strip hole both sides, and rotation axis can move along strip hole.
The beneficial effects of the utility model: simple in structure, easy to use, but the synthetic multiple geometric figure of random set carries out teaching demonstration.
Description of drawings
Accompanying drawing 1 is the utility model structural representation.
Fig. 2, Fig. 3, Fig. 4 demonstrate geometric user mode figure for the utility model combines.
Embodiment
Do following detailed description below in conjunction with 1 pair of the utility model of accompanying drawing: a kind of changeable instrument, the full circle protractor 1 that comprises peripheral band angle index line 3, full circle protractor center is connected with the ruler 4 of middle belt length cylindrical void 5 by rotation axis 2, there is length scale mark 6 on the strip hole both sides, and rotation axis can move along strip hole.
Claims (1)
1. novel changeable instrument, comprise that periphery has the full circle protractor of angle index line, is characterized in that: full circle protractor center is connected by the ruler of rotation axis with middle belt length cylindrical void, and there is the length scale on the strip hole both sides, and rotation axis can move along strip hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205170538U CN201845463U (en) | 2010-08-25 | 2010-08-25 | Novel variable instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205170538U CN201845463U (en) | 2010-08-25 | 2010-08-25 | Novel variable instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201845463U true CN201845463U (en) | 2011-05-25 |
Family
ID=44040348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205170538U Expired - Fee Related CN201845463U (en) | 2010-08-25 | 2010-08-25 | Novel variable instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201845463U (en) |
-
2010
- 2010-08-25 CN CN2010205170538U patent/CN201845463U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20110825 |