CN212966686U - Probability normal distribution demonstration device - Google Patents
Probability normal distribution demonstration device Download PDFInfo
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- CN212966686U CN212966686U CN202021852097.6U CN202021852097U CN212966686U CN 212966686 U CN212966686 U CN 212966686U CN 202021852097 U CN202021852097 U CN 202021852097U CN 212966686 U CN212966686 U CN 212966686U
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Abstract
The utility model discloses a probability normal distribution demonstration device, which comprises a support frame and a demonstration board, wherein the support frame consists of four support legs, the inner sides of the hinged parts of the support legs are provided with rotary regulators, and the shells of the rotary regulators are fixed on the support frame; the demonstration board is arranged between the two groups of supporting legs and consists of a front board, a demonstration layer and a rear board, the demonstration layer is arranged between the front board and the rear board, a ball storage box is arranged at the upper part of the demonstration layer, a plurality of demonstration balls are arranged in the ball storage box, a demonstration groove is arranged at the lower side of the ball storage box, a movable resisting pin is arranged between the ball storage box and the demonstration groove, a plurality of ball stopping columns which are uniformly distributed in a crossed mode are arranged in the demonstration groove, a plurality of ball receiving grooves are arranged at the lower side of the demonstration groove, a gravity sensing device is arranged at the bottom of each ball receiving groove, and a display screen is electrically connected to the lower side of the; the utility model discloses simple structure can return to the demonstration ball is automatic, can present the bobble distribution data automatically, convenient to use.
Description
Technical Field
The utility model relates to a teaching aid technical field, in particular to probability normal distribution presentation device.
Background
The normal distribution related content is taught in the courses of probability, statistics and the like in higher education. In the teaching of probability, the concept understanding of random variables is difficult, and the understanding of normal distribution of the random variables is particularly important. In the traditional teaching, normal distribution is mainly taught through methods such as a display formula and a curve graph, the teaching process is boring and difficult to understand, and the teaching effect is poor. Normal density distribution demonstration instrument among the prior art adopts the bobble to demonstrate mostly, the bobble is in a certain ball receiving pipe that finally falls into its below through collision many times, through direct-viewing observation, the global distribution that can discover the bobble is normal curve distribution, can let the student feel the normal distribution of random variable directly perceived through this kind of demonstration instrument, but the distribution condition of bobble can only be observed to this kind of mode, can't convert it into data, further carry out the analysis, if the mode of manual work checking number is too troublesome, therefore we provide a probability normal distribution demonstration device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a probability normal distribution presentation device, simple structure can with the automatic playback of demonstration ball, can present the bobble distribution data automatically, convenient to use.
In order to achieve the above object, the utility model provides a following technical scheme: a probability normal distribution demonstration device comprises a support frame and a demonstration board, wherein the support frame is composed of four support legs, every two support legs are in a group and are mutually hinged together, and the lower parts of the same group of support legs are provided with folding support rods; the inner side of the hinged part of each group of supporting legs is provided with a rotary adjuster, the shell of the rotary adjuster is fixed on the supporting frame, the inner wall of the shell is provided with two grooves, a fixed shaft is inserted into the shell, a spring groove is formed in the fixed shaft, a spring is arranged in the spring groove, and the tail end of the spring is connected with a lug; be provided with the demonstration board of installing on fixed axle between two sets of supporting legs, the demonstration board comprises front bezel, demonstration layer and back plate, the demonstration layer sets up between front bezel and back plate, demonstration layer upper portion is provided with stores up the ball box, be provided with a plurality of demonstration ball in the storage ball box, it has the demonstration groove to store up ball box downside intercommunication, it is provided with the offset loose pin to store up between ball box and the demonstration groove, be provided with a plurality of alternately evenly distributed's fender ball post in the demonstration groove, demonstration groove downside sets up and connects the ball groove with a plurality of, every connects the ball groove bottom all to be provided with a gravity sensing device, gravity sensing device downside electric connection has the display screen.
Preferably, the front plate is made of a transparent acrylic material.
Preferably, the rear plate is made of transparent acrylic material.
Preferably, the rear plate is made of an opaque white plate.
Preferably, the demonstration balls are the same in size and weight and are made of PVC materials.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model is provided with a rotary regulator, the demonstration board can be freely turned over up and down, when the ball storage box is on, the blocking movable pin is opened, the demonstration balls fall into the demonstration groove, finally fall into the ball receiving groove through the ball blocking column, the probability distribution condition can be observed through the number of the demonstration balls falling into different demonstration grooves, and the demonstration ball receiving groove is very visual; the weight data of the demonstration balls in each ball receiving groove can be presented through the gravity sensing device and the display screen at the bottom of the demonstration groove, and the data can be used for analysis and calculation, so that students can conveniently understand a normal distribution formula, and teaching is facilitated; after one-time demonstration is completed, the demonstration board can be turned over to enable the demonstration balls to fall into the ball storage box, then the movable pin is closed, and then the demonstration board is turned over, so that the next demonstration can be performed, and the demonstration ball box is simple and convenient to use; when the back board of the demonstration board is a white board, the demonstration board can be used for writing and is convenient for teaching; the utility model discloses inner structure adopts closed, makes the demonstration ball can not lose.
Drawings
Fig. 1 is a schematic front structural view of the present invention.
Fig. 2 is a schematic side view of the present invention.
Fig. 3 is a schematic structural view of the rotary adjuster of the present invention.
In the figure: 1. the support frame, 101, the supporting leg, 2, the demonstration board, 3, store up the ball box, 4, the demonstration ball, 5, keep out the removable pin, 6, the demonstration groove, 7, the bumping post, 8, the ball groove that connects, 9, gravity sensing device, 10, the display screen, 11, the front bezel, 12, the back plate, 13, the demonstration layer, 14, the rotary adjuster, 15, folding vaulting pole, 16, the shell, 17, the recess, 18, the fixed axle, 19, the spring groove, 20, the spring, 21, the lug.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the embodiment provides a probability normal distribution demonstration apparatus, which includes a support frame 1 and a demonstration board 2, wherein the support frame 1 is composed of four support legs 101, each two of the support legs 101 are in a group and hinged together, and the lower parts of the same group of support legs 101 are provided with folding support rods 15; the inner side of the hinged part of each group of supporting legs 101 is provided with a rotary regulator 14, a shell 16 of the rotary regulator 14 is fixed on the supporting frame 1, the inner wall of the shell 16 is provided with two grooves 17, a fixed shaft 18 is inserted into the shell 16, a spring groove 19 is formed in the fixed shaft 18, a spring 20 is arranged in the spring groove 19, and the tail end of the spring 20 is connected with a lug 21; be provided with between two sets of supporting legs 101 and install demonstration board 2 on fixed axle 18, demonstration board 2 comprises front bezel 11, demonstration layer 13 and back plate 12, demonstration layer 13 sets up between front bezel 11 and back plate 12, demonstration layer 13 upper portion is provided with stores up ball box 3, it is provided with a plurality of demonstration ball 4 in the ball box 3 to store up, it has demonstration groove 6 to store up 3 downside intercommunications of ball box, it keeps out removable pin 5 to be provided with between ball box 3 and the demonstration groove 6 to store up, be provided with a plurality of alternately evenly distributed's ball blocking post 7 in the demonstration groove 6, demonstration groove 6 downside sets up and connects ball groove 8 with a plurality of, every connects ball groove 8 bottom all to be provided with a gravity sensing device 9, gravity sensing device 9 downside electric connection has display screen 10.
In order to observe the falling condition of the demonstration ball 5 and the normal distribution condition of the demonstration ball falling into the ball receiving groove 8 conveniently, in the embodiment, the front plate 11 is made of transparent acrylic material.
In order to increase the utility model discloses a functional diversity, the teacher of being convenient for uses, in this embodiment, the material of back plate 12 is opaque blank.
In order to make the gravity sensing device 9 present the distribution of the demonstration balls 4 in each ball receiving groove 8, in the present embodiment, the demonstration balls 4 have the same size and weight, and are made of PVC material.
The utility model discloses a theory of operation: before use, whether all demonstration balls 4 are in the ball storage box 3 is checked, if the demonstration balls are not in the ball storage box 3 or are not completely in the ball storage box 3, the resisting movable pin 5 is opened, the demonstration plate 2 is rotated to enable the ball storage box 3 to be located below, the demonstration balls 4 all fall into the ball storage box 3, the resisting movable pin 5 is closed, then the ball storage box 3 is rotated to the upper side, the resisting movable pin 5 is opened, the demonstration balls 4 fall into the demonstration groove 6, and finally fall into the ball receiving groove 8 through the ball blocking column 7, so that probability distribution conditions can be observed through the number of the demonstration balls 4 falling into different ball receiving grooves 8, and the demonstration ball receiving device is very visual; the weight data of the demonstration ball 4 in each ball receiving groove 8 can be presented through the gravity sensing device 9 and the display screen 10 at the bottom of the demonstration groove 4, and the demonstration ball can be used for analysis and calculation, so that students can conveniently understand a normal distribution formula and can conveniently teach; after one-time demonstration is completed, the demonstration board 2 can be turned over, so that the demonstration balls 6 fall into the ball storage box 3, then the stop loose pins 5 are closed, and then the demonstration board 2 is turned over, so that the next demonstration can be performed, and the demonstration device is simple and convenient to use; the utility model is provided with the rotary regulator 14, so that the demonstration board 2 can be ensured to be vertical in the falling process of the demonstration ball 4, and the factors influencing the falling position of the demonstration ball 4 are reduced; when the back plate 12 is a white plate, the writing board can be used for writing, and is convenient for teaching; when the rear plate 12 is a transparent acrylic plate, the falling distribution condition of the demonstration balls 4 can be observed on two sides, so that the use is convenient; the internal structure of the utility model adopts a closed type, so that the demonstration ball 4 can not be lost; after the use is finished, the support frame 1 can be folded by utilizing the folding support rod 15, and the storage is convenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a probability normal distribution presentation device, includes support frame and demonstration board, its characterized in that: the support frame consists of four support legs, each two support legs are in a group and are mutually hinged together, and the lower parts of the same group of support legs are provided with folding support rods; the inner side of the hinged part of each group of supporting legs is provided with a rotary adjuster, the shell of the rotary adjuster is fixed on the supporting frame, the inner wall of the shell is provided with two grooves, a fixed shaft is inserted into the shell, a spring groove is formed in the fixed shaft, a spring is arranged in the spring groove, and the tail end of the spring is connected with a lug; be provided with the demonstration board of installing on fixed axle between two sets of supporting legs, the demonstration board comprises front bezel, demonstration layer and back plate, the demonstration layer sets up between front bezel and back plate, demonstration layer upper portion is provided with stores up the ball box, be provided with a plurality of demonstration ball in the storage ball box, it has the demonstration groove to store up ball box downside intercommunication, it is provided with the offset loose pin to store up between ball box and the demonstration groove, be provided with a plurality of alternately evenly distributed's fender ball post in the demonstration groove, demonstration groove downside sets up and connects the ball groove with a plurality of, every connects the ball groove bottom all to be provided with a gravity sensing device, gravity sensing device downside electric connection has the display screen.
2. The apparatus for demonstrating probabilistically normal distribution according to claim 1, wherein: the front plate is made of transparent acrylic material.
3. The apparatus for demonstrating probabilistically normal distribution according to claim 2, wherein: the back plate is made of transparent acrylic material.
4. The apparatus for demonstrating probabilistically normal distribution according to claim 2, wherein: the rear plate is made of an opaque white plate.
5. The apparatus for demonstrating probabilistically normal distribution according to claim 1, wherein: the demonstration balls are the same in size and weight and are made of PVC materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021852097.6U CN212966686U (en) | 2020-08-31 | 2020-08-31 | Probability normal distribution demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021852097.6U CN212966686U (en) | 2020-08-31 | 2020-08-31 | Probability normal distribution demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212966686U true CN212966686U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021852097.6U Expired - Fee Related CN212966686U (en) | 2020-08-31 | 2020-08-31 | Probability normal distribution demonstration device |
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| Country | Link |
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| CN (1) | CN212966686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689764A (en) * | 2021-08-25 | 2021-11-23 | 安徽理工大学 | College mathematics probability distribution demonstrates teaching aid |
-
2020
- 2020-08-31 CN CN202021852097.6U patent/CN212966686U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689764A (en) * | 2021-08-25 | 2021-11-23 | 安徽理工大学 | College mathematics probability distribution demonstrates teaching aid |
| CN113689764B (en) * | 2021-08-25 | 2023-01-31 | 安徽理工大学 | University's mathematics probability distribution demonstrates teaching aid |
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| 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: 20210413 Termination date: 20210831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |