CN209691180U - A kind of student instruction demonstration device for probability - Google Patents
A kind of student instruction demonstration device for probability Download PDFInfo
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- CN209691180U CN209691180U CN201920099540.8U CN201920099540U CN209691180U CN 209691180 U CN209691180 U CN 209691180U CN 201920099540 U CN201920099540 U CN 201920099540U CN 209691180 U CN209691180 U CN 209691180U
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- ball
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- storing box
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Abstract
The utility model discloses a kind of student instruction demonstration device for probabilities, including demonstration box, the demonstration box bottom end is equipped with ball-storing box, stirring rod is installed inside the ball-storing box, ball-storing box inner wall bottom end two sides are mounted on guide plate, the demonstration box interior side is equipped with high-pressure air pipe, the high-pressure air pipe side is socketed with branch gas bottom tube, the ball-storing box bottom end offers ball mouth, the ball mouth side is equipped with pull rod by sliding slot, the utility model is scientific and reasonable for structure, it is safe and convenient to use, it is provided with stirring rod and guide plate, it ensure that each demonstration ball falls the identical of probability, substantially increase the accuracy of probability Demonstrator Trials, it is provided with high-pressure air pipe and recovery tube, apparatus for demonstrating is set to meet the demand of different probability test, it is convenient for intuitively changing the probabilistic knowledge being abstracted simultaneously, the study for reducing student is difficult Degree, is provided with pull rod and sliding slot, realizes freely controlling to valve, ensure that Demonstrator Trials smoothly carry out.
Description
Technical field
The utility model relates to teaching equipment technical field, specially a kind of student instruction demonstration device for probability.
Background technique
Teaching demonstration is teacher in teaching, shows student to see in kind or audio-visual aids, or the reality of presenting a demonstration property
It tests, the method that perceptual knowledge is used to illustrate and confirm taught knowledge is obtained by actual observation, wherein in mathematical education,
Probability is always an abstract and elusive concept, and probability is measurement a possibility that chance event occurs, generally
A possibility that being occurred with one event of a real number representation between 0 to 1 size, probability is objective demonstration, rather than subjectivity is tested
Card, but existing Probability Teaching apparatus for demonstrating when in use exist it cannot be guaranteed that different colours demonstration ball mixing uniformity and
Randomness, part demonstrate ball and are easy to fix in ball-storing box bottom end two sides, influence the accuracy of probability Demonstrator Trials and be not able to satisfy
The demand of different probability test, the poor problem of apparatus for demonstrating property easy to use, so we are to these situations, it is above-mentioned to avoid
Technical problem, it is necessory to provide a kind of student instruction demonstration device for probability to overcome the defect in the prior art.
Utility model content
The purpose of this utility model is to provide a kind of student instruction demonstration device for probabilities, to solve above-mentioned background technique
In existing Probability Teaching apparatus for demonstrating exist when in use it cannot be guaranteed that the uniformity of different colours demonstration ball mixing and random
Property, part demonstrates ball and is easy to fix in ball-storing box bottom end two sides, influences the accuracy of probability Demonstrator Trials and be not able to satisfy difference
The demand of probabilistic experiment, the poor problem of apparatus for demonstrating property easy to use.
To achieve the above object, the utility model provides the following technical solutions: a kind of student instruction demonstration device for probability,
Including demonstration box, the demonstration box top is equipped with ball-storing box by fixture nut, and the ball-storing box top is hinged with capping, institute
It states capping inside and bearing block is installed, the bearing block top is equipped with motor, and side is hinged with transparent outside the demonstration box
Window, the demonstration box inner tip are equipped with pipe of losing by fixture nut, and the tube bottom end of losing uniformly is socketed with counting cylinder,
Side is socketed with recovery tube outside the pipe of losing, and the tube top end of losing is equipped with air pump, the motor by fixture nut
Bottom end is equipped with shaft, and the shaft two sides pass through cutting ferrule and are connected with stirring rod, and ball-storing box inner wall side offers slotting
Mouthful, ball-storing box inner bottom two sides are welded with guide plate, and the ball-storing box bottom end offers ball mouth, the ball mouth
Inside is equipped with valve, and the air pump bottom end is socketed with high-pressure air pipe, and the high-pressure air pipe side is equipped with branch gas bottom tube, described
The output end of the uniform alternating current of the input terminal of motor and air pump is electrically connected.
Preferably, the guide plate and the angle of horizontal direction are 40 degree, and guide groove is offered inside guide plate.
Preferably, the demonstration box side is equipped with handle by fixture nut, and Anti-slip cover is socketed with outside handle.
Preferably, the valve side offers sliding slot, and side is connected with pull rod by briquetting outside the valve, described
It is fixedly connected between briquetting and sliding slot inner wall by compressed spring.
Preferably, the length of the valve is equal to the diameter of ball mouth.
Preferably, the demonstration box bottom end is equipped with support leg by fixture nut, and support leg bottom end is socketed with rubber
Cushion block.
The prior art is compared, the beneficial effects of the utility model are: the utility model is scientific and reasonable for structure, uses secure side
Just:
1, it is provided with motor, stirring rod, guide plate and ball mouth, drives stirring rod to drill ball-storing box inside by motor
Show that ball is sufficiently stirred, ensure that the uniformity and randomness of different colours demonstration ball mixing, and cooperates guide plate that will demonstrate
Ball is flowed out by ball mouth, is avoided part demonstration ball from fixing in ball-storing box bottom end two sides, be ensure that each demonstration ball is fallen generally
Rate it is identical, to substantially increase the accuracy of probability Demonstrator Trials.
2, it is provided with air pump, high-pressure air pipe, branch gas bottom tube and recovery tube, when needing the demonstration ball that will fall off to be returned every time
It receives, when continuing to be placed on inside ball-storing box, opening air pump will be drilled by the compressed gas inside high-pressure air pipe and branch gas bottom tube
Show ball by counting cylinder bottom end by losing pipe and recovery tube is placed again into ball-storing box, so that apparatus for demonstrating be made to meet not
With the demand of probabilistic experiment, the convenience that device uses is improved, while convenient for intuitively changing the probabilistic knowledge being abstracted, reducing
Raw learning difficulty improves the learning efficiency of student.
3, it is provided with pull rod, sliding slot, briquetting and compressed spring, pulls pull rod, through pull rod band movable valve inside sliding slot
It is slided, ball mouth is opened, demonstration ball is fallen, and is squeezed by briquetting compressed spring, when needs are to out
When ball mouth is blocked, releasing lever blocks ball mouth by the reset of compressed spring, to realize to valve
It freely controls, ensure that Demonstrator Trials smoothly carry out.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic diagram of internal structure of the utility model ball-storing box；
Fig. 3 is that the utility model is lost the mounting structure schematic diagram of pipe；
Fig. 4 is the mounting structure schematic diagram of the utility model valve；
Figure label: 1, demonstration box；2, ball-storing box；3, it covers；4, bearing block；5, motor；6, transparency window；7, it loses pipe；
8, cylinder is counted；9, recovery tube；10, air pump；11, shaft；12, stirring rod；13, socket；14, guide plate；15, valve；16, go out ball
Mouthful；17, high-pressure air pipe；18, branch gas bottom tube；19, pull rod；20, sliding slot；21, briquetting；22, compressed spring.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment, based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-4 is please referred to, the utility model provides a kind of technical solution, a kind of student instruction demonstration device for probability, packet
Demonstration box 1 is included, the frictional force between demonstration box 1 and desktop is increased by the rubber cushion blocks of support leg bottom end, avoids demonstration box 1
Sliding occurs when in use to fall, improves fastness of the demonstration box 1 when putting, 1 bottom end of demonstration box is pacified by fixture nut
Equipped with support leg, and support leg bottom end is socketed with rubber cushion blocks, is carried convenient for teacher to demonstration box 1 by handle, simultaneously
Friction between handle and the palm of the hand is increased by Anti-slip cover, avoids demonstration box 1 from falling in carrying process, is damaged,
1 side of demonstration box is equipped with handle by fixture nut, and Anti-slip cover is socketed with outside handle, and 1 top of demonstration box passes through fixation
Nut is equipped with ball-storing box 2, and 2 top of ball-storing box is hinged with capping 3, and bearing block 4,4 top of bearing block peace are equipped with inside capping 3
Equipped with motor 5,5 model ZGB37RG12 of motor, 1 outside side of demonstration box is hinged with transparency window 6, and 1 inner tip of demonstration box is logical
It crosses fixture nut and pipe 7 of losing is installed, 7 bottom end of pipe of losing, which is uniformly socketed with, counts cylinder 8, and 7 outside side of pipe of losing is socketed with back
Closed tube 9,7 top of pipe of losing are equipped with air pump 10,10 model ZQ320-01PM of air pump, 5 bottom end of motor peace by fixture nut
Equipped with shaft 11,11 two sides of shaft pass through cutting ferrule and are connected with stirring rod 12, and 2 inner wall side of ball-storing box offers socket 13.
2 inner bottom two sides of ball-storing box are welded with guide plate 14, can be to storage by the guide groove inside guide plate 14
Demonstration ball inside ball case 2 is oriented to, and is avoided part demonstration ball from fixing in 2 two sides bottom end of ball-storing box, is influenced device probability and drill
The angle of the accuracy shown, guide plate 14 and horizontal direction is 40 degree, and guide groove, ball-storing box are offered inside guide plate 14
2 bottom ends offer ball mouth 16, and valve 15 is equipped with inside ball mouth 16, carry out in time for the ease of valve 15 to ball mouth 16
It blocks, demonstration ball is avoided to continue to be flowed out by ball mouth 16, probability demonstration is interfered, meet apparatus for demonstrating to different probability reality
The demand tested, the length of valve 15 are equal to the diameter of ball mouth 16, and 10 bottom end of air pump is socketed with high-pressure air pipe 17, high-pressure air pipe 17
Side is equipped with branch gas bottom tube 18, and the output end of the uniform alternating current of the input terminal of motor 5 and air pump 10 is electrically connected.
15 side of valve offers sliding slot 20, and 15 outside side of valve is connected with pull rod 19 by briquetting 21, briquetting 21 with
It is fixedly connected between 20 inner wall of sliding slot by compressed spring 22.
The working principle and process for using of the utility model: in the process using a kind of student instruction demonstration device for probability
In, firstly, opening capping 3, demonstration ball is placed on inside ball-storing box 2, after covering capping 3, when carrying out probabilistic experiment demonstration,
Motor 5 is opened, drives stirring rod 12 to rotate by shaft 11, the demonstration ball inside ball-storing box 2 is sufficiently stirred, ensure that
Different colours demonstrate the uniformity and randomness of ball mixing, pull valve 15 by pull rod 19, and cooperate guide plate 14 that will demonstrate
Ball is flowed out by ball mouth 16, is avoided part demonstration ball from fixing in 2 bottom end two sides of ball-storing box, be ensure that each demonstration ball is fallen
Probability it is identical, to substantially increase the accuracy of probability Demonstrator Trials, demonstration ball enters to pipe 7 of losing by ball mouth 16
Inside, and flow into count inside cylinder 8 at random, student is by the quantity to demonstration ball inside counting cylinder 8, to each color ball
Probability is counted, and when needing the demonstration ball that will fall off to be recycled every time, when continuing to be placed on 2 inside of ball-storing box, opens gas
Demonstration ball is passed through pipe of losing by 8 bottom end of counting cylinder by the compressed gas inside high-pressure air pipe 17 and branch gas bottom tube 18 by pump 10
7 and recovery tube 9 be placed again into ball-storing box 2, thus make apparatus for demonstrating meet different probability test demand, improve dress
Set the convenience used.
Finally, releasing lever 19 pushes briquetting 21 by compressed spring 22 when needing to block ball mouth 16,
Valve 15 is resetted, ball mouth 16 is blocked, to realize freely controlling to valve 15, ensure that Demonstrator Trials are flat
Steady progress.
Finally, it should be noted that being not limited to this reality the foregoing is merely the preferred embodiment of the utility model
With novel, although the utility model is described in detail with reference to the foregoing embodiments, come for those skilled in the art
Say, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic into
Row equivalent replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, should all
It is included within the scope of protection of this utility model.
Claims (6)
1. a kind of student instruction demonstration device for probability, including demonstration box (1), it is characterised in that: demonstration box (1) top is logical
It crosses fixture nut to be equipped with ball-storing box (2), ball-storing box (2) top is hinged with capping (3), installation inside the capping (3)
Have bearing block (4), bearing block (4) top is equipped with motor (5), and the external side of the demonstration box (1) is hinged with transparency window
(6), demonstration box (1) inner tip is equipped with pipe of losing (7) by fixture nut, and pipe of losing (7) bottom end uniformly covers
It is connected to and counts cylinder (8), the external side of the pipe of losing (7) is socketed with recovery tube (9), and pipe of losing (7) top passes through fixation
Nut is equipped with air pump (10), and motor (5) bottom end is equipped with shaft (11), and shaft (11) two sides are connected by cutting ferrule
It is connected to stirring rod (12), ball-storing box (2) the inner wall side offers socket (13), ball-storing box (2) the inner bottom two sides
It is welded with guide plate (14), ball-storing box (2) bottom end offers ball mouth (16), is equipped with inside the ball mouth (16)
Valve (15), air pump (10) bottom end are socketed with high-pressure air pipe (17), and high-pressure air pipe (17) side is equipped with branch gas bottom
It manages (18), the output end of the uniform alternating current of input terminal of the motor (5) and air pump (10) is electrically connected.
2. a kind of student instruction demonstration device for probability according to claim 1, it is characterised in that: the guide plate (14)
Angle with horizontal direction is 40 degree, and offers guide groove inside guide plate (14).
3. a kind of student instruction demonstration device for probability according to claim 1, it is characterised in that: the demonstration box (1)
Side is equipped with handle by fixture nut, and Anti-slip cover is socketed with outside handle.
4. a kind of student instruction demonstration device for probability according to claim 1, it is characterised in that: the valve (15) one
Side offers sliding slot (20), and the external side of the valve (15) is connected with pull rod (19) by briquetting (21), the briquetting (21)
It is fixedly connected between sliding slot (20) inner wall by compressed spring (22).
5. a kind of student instruction demonstration device for probability according to claim 1, it is characterised in that: the valve (15)
Length is equal to the diameter of ball mouth (16).
6. a kind of student instruction demonstration device for probability according to claim 1, it is characterised in that: the demonstration box (1)
Bottom end is equipped with support leg by fixture nut, and support leg bottom end is socketed with rubber cushion blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920099540.8U CN209691180U (en) | 2019-01-22 | 2019-01-22 | A kind of student instruction demonstration device for probability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920099540.8U CN209691180U (en) | 2019-01-22 | 2019-01-22 | A kind of student instruction demonstration device for probability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209691180U true CN209691180U (en) | 2019-11-26 |
Family
ID=68599610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920099540.8U Expired - Fee Related CN209691180U (en) | 2019-01-22 | 2019-01-22 | A kind of student instruction demonstration device for probability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209691180U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111145617A (en) * | 2020-01-18 | 2020-05-12 | 西安文理学院 | Mathematical probability demonstration device |
| CN112185217A (en) * | 2020-09-30 | 2021-01-05 | 郑州航空工业管理学院 | Probability calculation demonstration equipment for mathematical education |
| CN112634714A (en) * | 2020-12-28 | 2021-04-09 | 山东交通学院 | Higher mathematics probability presentation device |
| CN113436510A (en) * | 2021-07-08 | 2021-09-24 | 长春电子科技学院 | Mathematical interactive teaching method |
-
2019
- 2019-01-22 CN CN201920099540.8U patent/CN209691180U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111145617A (en) * | 2020-01-18 | 2020-05-12 | 西安文理学院 | Mathematical probability demonstration device |
| CN112185217A (en) * | 2020-09-30 | 2021-01-05 | 郑州航空工业管理学院 | Probability calculation demonstration equipment for mathematical education |
| CN112634714A (en) * | 2020-12-28 | 2021-04-09 | 山东交通学院 | Higher mathematics probability presentation device |
| CN113436510A (en) * | 2021-07-08 | 2021-09-24 | 长春电子科技学院 | Mathematical interactive teaching method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191126 Termination date: 20210122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |