CN203026006U - Trigonometric function measuring instrument - Google Patents
Trigonometric function measuring instrument Download PDFInfo
- Publication number
- CN203026006U CN203026006U CN 201320046340 CN201320046340U CN203026006U CN 203026006 U CN203026006 U CN 203026006U CN 201320046340 CN201320046340 CN 201320046340 CN 201320046340 U CN201320046340 U CN 201320046340U CN 203026006 U CN203026006 U CN 203026006U
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- China
- Prior art keywords
- scale
- trigonometric function
- measuring instrument
- graphometer
- staff
- 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.)
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Abstract
The utility model relates to a trigonometric function measuring instrument which comprises a graphometer, a fixed scale staff, a rotational scale staff and a moving scale staff, and as well as a clamping groove formed in the lower edge of the fixed scale staff, and a clamping shaft arranged at the top end of the moving scale staff. The trigonometric function measuring instrument not only has the functions of a conventional graphometer and a scale staff, and in particular can measure a trigonometric function of any acute angle simply and conveniently, so that the dependency on a trigonometric function chart in mathematical teaching and learning activities is greatly lowered. The trigonometric function measuring instrument is simple in structure, low in cost, simple and convenient to operate, and the use in daily teaching and learning of the mathematical trigonometric function in junior high schools is fulfilled.
Description
Technical field
The utility model relates to a kind of student and measures stationery, relates in particular to a kind of trigonometric function instrument for measuring and calculating.
Background technology
At present, in the teaching and Students ' Learning practical activity of the relevant trigonometric function of middle school mathematics, except indivedual special angles, often to look into trigonometric function value by table of trigonometric function or scientific calculator for any acute angle trigonometric function value problem, utilize existing teaching aid and student stationery conveniently to obtain, cause very big inconvenience for the daily study practical activity of student.
The utility model content
Technical problem to be solved in the utility model be to provide a kind of make simple, cost is lower, easy and simple to handle, the trigonometric function instrument for measuring and calculating that can effectively calculate the trigonometric function value of any acute angle.
For addressing the above problem, trigonometric function instrument for measuring and calculating described in the utility model is characterized in that:
This trigonometric function instrument for measuring and calculating comprises graphometer, is located at described fixedly graduated scale and rotating scale scale on described graphometer.
This trigonometric function instrument for measuring and calculating is provided with the shift scale scale.
Described fixedly graduated scale lower limb is provided with described draw-in groove, and described shift scale scale top is provided with described axis.
The utility model compared with prior art has the following advantages:
1, because graphometer described in the utility model is provided with described fixedly graduated scale and rotating scale scale, by described rotating scale scale rotating freely within the specific limits, form required any acute angle with described fixedly graduated scale is convenient on described graphometer.
2, owing to being provided with described shift scale scale in the utility model, can consisting of three limits of a certain right-angle triangle in acute angle to be measured place with described fixedly graduated scale and rotating scale scale, and demonstrate the size on three limits, thereby obtain its trigonometric function value.Especially utilize the mobility of shift scale scale, when asking trigonometric function value, with correspondence ask than both sides in the size on denominator limit be adjusted into round values, with the convenient evaluation that calculates.
3, due to described in the utility model fixedly the graduated scale lower limb be provided with described draw-in groove, described shift scale scale top is provided with described axis, can strengthen the stability of its use, guarantee that described shift scale scale is vertical with described fixedly graduated scale all the time in moving process.
4, the utility model making is simple, cost is lower, easy and simple to handle, can not only be used in combination the trigonometric function value of calculating easily any acute angle, can use as graphometer and graduated scale separately again.
Description of drawings
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
In figure: 1-graphometer 2-is graduated scale 3-rotating scale scale 4-shift scale scale 5-draw-in groove fixedly
The 6-axis
Fig. 2 is for measuring the explanation schematic diagram of 60 ° of cosine of an angle values.
Embodiment
As shown in Figure 1, the trigonometric function instrument for measuring and calculating, this instrument for measuring and calculating comprises graphometer 1, fixedly graduated scale 2, rotating scale scale 3; Shift scale scale 4; Draw-in groove 5 and axis 6.
Wherein, rotating scale scale 3 is in rotation, and its 0 scale aligns with fixing 0 scale of graduated scale 2 all the time, and its scale edge aligns with corresponding angle scale mark on graphometer 1.
Shift scale scale 4 in movement, the axis on its top and fixedly the draw-in groove of graduated scale 2 lower limbs coincide, remaining with fixedly graduated scale 2 is vertical, and its 0 scale all the time with the fixing scale justified margin of graduated scale 2.
Implementation example is asked 60 ° of cosine of an angle values (as Fig. 2)
(1) rotation rotating scale scale makes its scale edge align with 60 ° of angle index lines on graphometer.
(2) axis on shift scale scale top is inserted in the draw-in groove of fixing graduated scale lower limb, along the mobile scale of draw-in groove, 5cm scale mark top on shift scale scale label edge and rotating scale scale is overlapped, then the registration of the scale edge correspondence of reading the shift scale scale on fixing graduated scale is 2.5cm.
(3) adjacent side/hypotenuse of cos60 °=60 °=2.5cm/5cm=0.500.
Claims (3)
1. trigonometric function instrument for measuring and calculating, it is characterized in that: this trigonometric function instrument for measuring and calculating comprises graphometer (1), is located at fixedly graduated scale (2) and rotating scale scale (3) on described graphometer (1), shift scale scale (4).
2. trigonometric function instrument for measuring and calculating as claimed in claim 1, it is characterized in that: described fixedly graduated scale (2) lower limb is provided with draw-in groove (5).
3. trigonometric function instrument for measuring and calculating as claimed in claim 1 is characterized in that: described shift scale scale (4) top is provided with axis (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320046340 CN203026006U (en) | 2013-01-25 | 2013-01-25 | Trigonometric function measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320046340 CN203026006U (en) | 2013-01-25 | 2013-01-25 | Trigonometric function measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026006U true CN203026006U (en) | 2013-06-26 |
Family
ID=48649972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320046340 Expired - Fee Related CN203026006U (en) | 2013-01-25 | 2013-01-25 | Trigonometric function measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203026006U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945769A (en) * | 2019-03-15 | 2019-06-28 | 袁野 | A kind of positive and negative Trigonometrid function board |
-
2013
- 2013-01-25 CN CN 201320046340 patent/CN203026006U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945769A (en) * | 2019-03-15 | 2019-06-28 | 袁野 | A kind of positive and negative Trigonometrid function board |
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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: 20130626 Termination date: 20140125 |