CN204348172U - Mathematical probabilities demonstration teaching aid - Google Patents
Mathematical probabilities demonstration teaching aid Download PDFInfo
- Publication number
- CN204348172U CN204348172U CN201520014409.9U CN201520014409U CN204348172U CN 204348172 U CN204348172 U CN 204348172U CN 201520014409 U CN201520014409 U CN 201520014409U CN 204348172 U CN204348172 U CN 204348172U
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- CN
- China
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- bung
- ladle body
- piston rod
- piston
- web joint
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- Expired - Fee Related
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Abstract
A kind of mathematical probabilities demonstration teaching aid, belong to educational aid field, solve to throw away in coin experimentation in demonstration at present and extremely expend muscle power, the problem of also losing time, it comprises framework, ladle body, iron coin, bung, piston rod, flat thin magnet, web joint, spring and limit rope, described framework at least comprises top board, base plate and column, is fixedly connected with between top board and base plate by the column of more than; Base plate is provided with a ladle body, in ladle body, is provided with one piece of iron coin; The upper end of ladle body, with bung shutoff, bung arranges multiple piston hole; A piston rod is provided with in each piston hole, flat thin magnet is provided with in the lower end of every root piston rod, the upper end of all piston rods is fixedly connected with by one piece of web joint, and web joint is connected with the top board of framework by spring, is connected between web joint with bung by the limit rope of more than.The utility model is for demonstrating Probability Experiments.
Description
Technical field
The utility model belongs to educational aid field, is specifically related to a kind of mathematical probabilities demonstration teaching aid.
Background technology
Probability is the concept of the rule definition that people occur according to random occurrence; be difficult to be understood by classmates and convince; so need to coordinate simple probability lecture experiment result to help classmates to understand; the probability lecture experiment the most often done throws away coin experiment exactly, and through repeatedly throwing away coin, the one side probability upwards obtaining coin is 1/2nd; repeatedly coin to be picked up in presentation process at present and throw again; coin is comparatively far away through what often can roll after landing, and extremely expends muscle power, also loses time.
Summary of the invention
The purpose of this utility model extremely expends muscle power, the problem of also losing time to solve to throw away in coin experimentation in demonstration at present, and provide a kind of mathematical probabilities demonstration teaching aid, its technical scheme is as follows:
A kind of mathematical probabilities demonstration teaching aid, it comprises framework, ladle body, iron coin, bung, piston rod, flat thin magnet, web joint, spring and limit rope, described framework at least comprises top board, base plate and column, is fixedly connected with between top board and base plate by the column of more than, base plate is provided with a ladle body, and ladle body adopts transparent material, is provided with one piece of iron coin in ladle body, and the surface of iron coin is provided with the mark such as color or pattern to distinguish pros and cons, the upper end of ladle body is with bung shutoff, the thickness of bung is greater than the diameter of iron coin, bung arranges multiple piston hole, the diameter of piston hole is less than the diameter of iron coin, be greater than 1/2nd of iron coin diameter, the distance in adjacent pistons hole is less than the diameter of iron coin, is less than the diameter of iron coin near the piston hole at bung edge and the distance at bung edge, a piston rod is provided with in each piston hole, the length of piston rod is more than or equal to the overall height of ladle body and bung, gap is left between piston rod and piston hole, ensure that piston rod easily slides in piston hole, flat thin magnet is provided with in the lower end of every root piston rod, the upper end of all piston rods is fixedly connected with by one piece of web joint, web joint is connected with the top board of framework by spring, be connected by the limit rope of more than between web joint with bung, limit rope is when straight condition, the lower surface of piston rod is positioned at piston hole and the coboundary of close piston hole.
The beneficial effects of the utility model are: during pressure piston rod, iron coin can pick up by flat thin magnet, spring can mention piston rod automatically, iron coin stops by piston hole lower limb, again at the bottom of dropping to barrel, repeatedly can demonstrate very easily and throw away coin experiment, do not need effort to pick up coin, can also experimental period be saved.
accompanying drawing illustrates:
Fig. 1 is the new structural representation of this practicality;
Fig. 2 is decomposing schematic representation of the present utility model.
embodiment:
See figures.1.and.2, a kind of mathematical probabilities demonstration teaching aid, it comprises framework 1, ladle body 2, iron coin 3, bung 4, piston rod 5, flat thin magnet 6, web joint 7, spring 8 and limit rope 9, described framework 1 at least comprises top board 1-1, base plate 1-2 and column 1-3, and the column 1-3 by more than between top board 1-1 and base plate 1-2 is fixedly connected with, base plate 1-2 is provided with a ladle body 2, and ladle body 2 adopts transparent material, is provided with one piece of iron coin 3 in ladle body 2, and the surface of iron coin 3 is provided with the mark such as color or pattern to distinguish pros and cons, the upper end of ladle body 2 is with bung 4 shutoff, the thickness of bung 4 is greater than the diameter of iron coin 3, bung 4 arranges multiple piston hole 4-1, the diameter of piston hole 4-1 is less than the diameter of iron coin 3, be greater than 1/2nd of iron coin 3 diameter, the distance of adjacent pistons hole 4-1 is less than the diameter of iron coin 3, is less than the diameter of iron coin 3 near the piston hole 4-1 at bung 4 edge and the distance at bung 4 edge, a piston rod 5 is provided with in each piston hole 4-1, the length of piston rod 5 is more than or equal to the overall height of ladle body 2 and bung 4, gap is left between piston rod 5 and piston hole 4-1, ensure that piston rod 5 easily slides in piston hole 4-1, flat thin magnet 6 is provided with in the lower end of every root piston rod 5, the upper end of all piston rods 5 is fixedly connected with by one piece of web joint 7, web joint 7 is connected with the top board 1-1 of framework 1 by spring 8, limit rope 9 by more than one between web joint 7 with bung 4 is connected, limit rope 9 is when straight condition, the lower surface of piston rod 5 is positioned at piston hole 4-1 and the coboundary of close piston hole 4-1.
Claims (3)
1. a mathematical probabilities demonstration teaching aid, it is characterized in that it comprises framework (1), ladle body (2), iron coin (3), bung (4), piston rod (5), flat thin magnet (6), web joint (7), spring (8) and limit rope (9), described framework (1) comprises top board (1-1), base plate (1-2) and column (1-3), and the column (1-3) by more than between top board (1-1) and base plate (1-2) is fixedly connected with, base plate (1-2) is provided with a ladle body (2), and ladle body (2) adopts transparent material, and in ladle body (2), be provided with one piece of iron coin (3), the surface of iron coin (3) is provided with mark, the upper end of ladle body (2) is with bung (4) shutoff, bung (4) arranges multiple piston hole (4-1), the diameter of piston hole (4-1) is less than the diameter of iron coin (3), be greater than 1/2nd of iron coin (3) diameter, the distance in adjacent pistons hole (4-1) is less than the diameter of iron coin (3), is less than the diameter of iron coin (3) near the piston hole (4-1) at bung (4) edge and the distance at bung (4) edge, a piston rod (5) is provided with in each piston hole (4-1), the length of piston rod (5) is more than or equal to the overall height of ladle body (2) and bung (4), gap is left between piston rod (5) and piston hole (4-1), flat thin magnet (6) is provided with in the lower end of every root piston rod (5), the upper end of all piston rods (5) is fixedly connected with by one piece of web joint (7), web joint (7) is connected with the top board (1-1) of framework (1) by spring (8), limit rope (9) by more than one between web joint (7) with bung (4) is connected.
2. a kind of mathematical probabilities demonstration teaching aid as claimed in claim 1, is characterized in that the thickness of bung (4) is greater than the diameter of iron coin (3).
3. a kind of mathematical probabilities demonstration teaching aid as claimed in claim 1, it is characterized in that limit rope (9) is when straight condition, the lower surface of piston rod (5) is positioned at piston hole (4-1) and the coboundary of close piston hole (4-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520014409.9U CN204348172U (en) | 2015-01-09 | 2015-01-09 | Mathematical probabilities demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520014409.9U CN204348172U (en) | 2015-01-09 | 2015-01-09 | Mathematical probabilities demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204348172U true CN204348172U (en) | 2015-05-20 |
Family
ID=53231427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520014409.9U Expired - Fee Related CN204348172U (en) | 2015-01-09 | 2015-01-09 | Mathematical probabilities demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204348172U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551347A (en) * | 2016-01-21 | 2016-05-04 | 殷俊峰 | Probability learning device for intelligent mathematics teaching |
| CN106409071A (en) * | 2016-09-19 | 2017-02-15 | 安徽理工大学 | Mathematical probability operation device for coin-toss experiment and control system of the mathematical probability operation device |
-
2015
- 2015-01-09 CN CN201520014409.9U patent/CN204348172U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551347A (en) * | 2016-01-21 | 2016-05-04 | 殷俊峰 | Probability learning device for intelligent mathematics teaching |
| CN105551347B (en) * | 2016-01-21 | 2019-02-05 | 临沂大学 | A kind of intelligent mathematical teaching probability learning device |
| CN106409071A (en) * | 2016-09-19 | 2017-02-15 | 安徽理工大学 | Mathematical probability operation device for coin-toss experiment and control system of the mathematical probability operation device |
| CN106409071B (en) * | 2016-09-19 | 2018-09-25 | 安徽理工大学 | One kind throwing coin experiment mathematical probabilities arithmetic facility and its control system |
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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: 20150520 Termination date: 20160109 |