CN204576904U - Acute angle trigonometric function monotonicity demonstrator - Google Patents
Acute angle trigonometric function monotonicity demonstrator Download PDFInfo
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- CN204576904U CN204576904U CN201520272214.4U CN201520272214U CN204576904U CN 204576904 U CN204576904 U CN 204576904U CN 201520272214 U CN201520272214 U CN 201520272214U CN 204576904 U CN204576904 U CN 204576904U
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- bracing wire
- swingle
- fixed bar
- axle
- vertical member
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Abstract
The utility model relates to a kind of acute angle trigonometric function monotonicity demonstrator, the center of quarter circular arc part is installed with fixed bar, turning axle is movably installed with at the link position of vertical member and horizontal element, turning axle is set with swingle, described fixed bar is installed with fixed bar bracing wire axle, fixed bar bracing wire axle is connected with fixed bar bracing wire, the bottom of fixed bar bracing wire is provided with fixed bar cord switch, described swingle is installed with swingle bracing wire axle, swingle bracing wire axle is connected with swingle bracing wire, the bottom of swingle bracing wire is provided with swingle cord switch, in use, can be directly perceived, objective, that cleans reflects acute angle trigonometric function monotonicity, student is helped to understand study same mutually, improve speed and the efficiency of student's understanding, improve quality of instruction.
Description
Technical field
The utility model relates to a kind of teaching aid, is specifically related to a kind of mathematics teaching aid, particularly a kind of acute angle trigonometric function monotonicity demonstrator.
Background technology
Teaching aid is that being sci-tech mass media completely, is indispensable equipment in teenager's scientific and technological activities by the material object propagated for the purpose of science and technology, education people.Teaching aid in scientific and technological activities has object visual and duplicate teaching aid.Specifically have from natural sample or sample: as the biological sample in education of science and technology activity, mineral sample, fossil, rock and rare animal sample etc.Also have Counterfeit Item and the model of sample: some sample is very precious, should not propagate, so people have made various Counterfeit Item and model, in order to propagate scientific and technical information everywhere.The model etc. that and for example mannikin, boat, sea, Che Sanmo are used.Teaching aid can also be divided into demonstration with and practice with two kinds.The feature of teaching aid and the effect in scientific and technological activities mainly contain following several: intuitive, practicality, have researching value, typicalness, need language medium, word medium coordinates.
Traditional mathematics teaching aid does not have the special apparatus for demonstrating for acute angle trigonometric function monotonicity, and student, between the learning period, can not understand acute angle trigonometric function intuitively accurately, causes puzzlement during Students ' Learning, reduces the efficiency of study.
Therefore, provide a kind of structure simple, easy to operate, visualization is high, good looking appearance, the acute angle trigonometric function monotonicity demonstrator that demonstrability is strong, has market outlook widely.
Summary of the invention
For the deficiencies in the prior art, the utility model provides the acute angle trigonometric function monotonicity demonstrator that a kind of structure is simple, easy to operate, visualization is high, good looking appearance, demonstrability are strong.
The technical solution of the utility model is achieved in that a kind of acute angle trigonometric function monotonicity demonstrator, comprise vertical member, horizontal element connected vertically with vertical member, be connected to the quarter circular arc part between vertical member and horizontal element, the center of described quarter circular arc part is installed with fixed bar, turning axle is movably installed with at the link position of vertical member and horizontal element, turning axle is set with swingle, described fixed bar is installed with fixed bar bracing wire axle, fixed bar bracing wire axle is connected with fixed bar bracing wire, the bottom of fixed bar bracing wire is provided with fixed bar cord switch, described swingle is installed with swingle bracing wire axle, swingle bracing wire axle is connected with swingle bracing wire, the bottom of swingle bracing wire is provided with swingle cord switch.
Described vertical member is equal with the length of horizontal element, and vertical member and horizontal element are strip rod-like structure, and the length of vertical member and horizontal element is all not less than the radius of quarter circular arc part.
Described swingle is the rod-like structure can doing 360 degree of rotary motions around turning axle, and swingle bracing wire axle is equal to the distance in the quarter circular arc part center of circle with fixed bar bracing wire axle to the distance in the quarter circular arc part center of circle.
Described fixed bar bracing wire is equal with the length of swingle bracing wire, and described fixed bar and quarter circular arc part are structure as a whole.
The utility model has following good effect: first, this product structure is simple, the center of quarter circular arc part is installed with fixed bar, turning axle is movably installed with at the link position of vertical member and horizontal element, turning axle is set with swingle, described fixed bar is installed with fixed bar bracing wire axle, fixed bar bracing wire axle is connected with fixed bar bracing wire, the bottom of fixed bar bracing wire is provided with fixed bar cord switch, described swingle is installed with swingle bracing wire axle, swingle bracing wire axle is connected with swingle bracing wire, the bottom of swingle bracing wire is provided with swingle cord switch, in use, can be directly perceived, objective, that cleans reflects acute angle trigonometric function monotonicity, student is helped to understand study same mutually, improve speed and the efficiency of student's understanding, improve quality of instruction, secondly, it is unified that each accessory produces installation specification, installs and uses flexible, be standard fitting, enhance intuitive during demonstration, further helps student to understand relevant knowledge.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is one of the utility model using state structural representation.
Fig. 3 is the utility model using state structural representation two.
Embodiment
As Fig. 1, 2, shown in 3, a kind of acute angle trigonometric function monotonicity demonstrator, comprise vertical member 1, horizontal element 2 connected vertically with vertical member 1, be connected to the quarter circular arc part 3 between vertical member 1 and horizontal element 2, the center of described quarter circular arc part 3 is installed with fixed bar 4, turning axle 6 is movably installed with at the link position of vertical member 1 and horizontal element 2, turning axle 6 is set with swingle 5, described fixed bar 4 is installed with fixed bar bracing wire axle 7, fixed bar bracing wire axle 7 is connected with fixed bar bracing wire 9, the bottom of fixed bar bracing wire 9 is provided with fixed bar cord switch 11, described swingle 5 is installed with swingle bracing wire axle 8, swingle bracing wire axle 8 is connected with swingle bracing wire 10, the bottom of swingle bracing wire 10 is provided with swingle cord switch 12.
Described vertical member 1 is equal with the length of horizontal element 2, and vertical member 1 and horizontal element 2 are strip rod-like structure, and the length of vertical member 1 and horizontal element 2 is all not less than the radius of quarter circular arc part 3.Described swingle 5 is the rod-like structure can doing 360 degree of rotary motions around turning axle 6, and the distance in swingle bracing wire axle 8 to quarter circular arc part 3 center of circle is equal with the distance in fixed bar bracing wire axle 7 to quarter circular arc part 3 center of circle.Described fixed bar bracing wire 9 is equal with the length of swingle bracing wire 10, and described fixed bar 4 is structure as a whole with quarter circular arc part 3.
Use four, be flat on by demonstrator on blackboard, horizontal element 2 is horizontal, doubles as x positive axis, make vertical member 1 upward, double as y positive axis, rotating rotary rods 5 can obviously be found out, is decreased to β at β
1process in, its variation tendency obviously shows as to the right, downwards, that is acute angles beta is decreased to β
1time, x increases, and y reduces, and quarter circular arc part 3 radius is constant all the time, thus basis directly perceived, is easy to guiding student and understands and draw following results:
When acute angle reduces, sinusoidal
, cosine
, tangent
; When acute angle increases, conclusion is contrary.
This product makes relevant teaching more directly perceived, is more conducive to understand; The study initiative of energy mobilizing students, causes learning interest and thinking, is beneficial to student's internalization knowledge; Be skillfully constructed, reasonable in design; Draw materials easily, cheap, economical environment-protective, is imbued with innovation.Its superiority is mainly: present x, y in triangle definition with the form of object colour terms and, with the variation tendency of angle change, so as to checking or the increase and decrease of inferring three angle value, thus realize the visualize of relevant teaching, have demonstration and display function preferably.
Claims (4)
1. an acute angle trigonometric function monotonicity demonstrator, comprise vertical member (1), with vertical member (1) horizontal element connected vertically (2), be connected to the quarter circular arc part (3) between vertical member (1) and horizontal element (2), it is characterized in that: the center of described quarter circular arc part (3) is installed with fixed bar (4), turning axle (6) is movably installed with at the link position of vertical member (1) and horizontal element (2), turning axle (6) is set with swingle (5), described fixed bar (4) is installed with fixed bar bracing wire axle (7), fixed bar bracing wire axle (7) is connected with fixed bar bracing wire (9), the bottom of fixed bar bracing wire (9) is provided with fixed bar cord switch (11), described swingle (5) is installed with swingle bracing wire axle (8), swingle bracing wire axle (8) is connected with swingle bracing wire (10), the bottom of swingle bracing wire (10) is provided with swingle cord switch (12).
2. acute angle trigonometric function monotonicity demonstrator according to claim 1, it is characterized in that: described vertical member (1) is equal with the length of horizontal element (2), vertical member (1) and horizontal element (2) are strip rod-like structure, further, the length of vertical member (1) and horizontal element (2) is all not less than the radius of quarter circular arc part (3).
3. acute angle trigonometric function monotonicity demonstrator according to claim 1, it is characterized in that: described swingle (5) is the rod-like structure can doing 360 degree of rotary motions around turning axle (6), and swingle bracing wire axle (8) is equal to the distance in quarter circular arc part (3) center of circle with fixed bar bracing wire axle (7) to the distance in quarter circular arc part (3) center of circle.
4. acute angle trigonometric function monotonicity demonstrator according to claim 1, is characterized in that: described fixed bar bracing wire (9) is equal with the length of swingle bracing wire (10), and described fixed bar (4) and quarter circular arc part (3) are structure as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520272214.4U CN204576904U (en) | 2015-04-30 | 2015-04-30 | Acute angle trigonometric function monotonicity demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520272214.4U CN204576904U (en) | 2015-04-30 | 2015-04-30 | Acute angle trigonometric function monotonicity demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204576904U true CN204576904U (en) | 2015-08-19 |
Family
ID=53869508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520272214.4U Expired - Fee Related CN204576904U (en) | 2015-04-30 | 2015-04-30 | Acute angle trigonometric function monotonicity demonstrator |
Country Status (1)
| Country | Link |
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| CN (1) | CN204576904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110517563A (en) * | 2019-08-14 | 2019-11-29 | 武汉光驰教育科技股份有限公司 | Interactive trigonometric function instructional device and method |
-
2015
- 2015-04-30 CN CN201520272214.4U patent/CN204576904U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110517563A (en) * | 2019-08-14 | 2019-11-29 | 武汉光驰教育科技股份有限公司 | Interactive trigonometric function instructional device and method |
| CN110517563B (en) * | 2019-08-14 | 2021-07-27 | 武汉光驰教育科技股份有限公司 | Interactive trigonometric function teaching device and method |
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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: 20150819 Termination date: 20160430 |