CN113205732A

CN113205732A - Probability model teaching aid for mathematical education

Info

Publication number: CN113205732A
Application number: CN202110487984.0A
Authority: CN
Inventors: 任丹丹; 刘金秋; 李亚玲
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-08-03

Abstract

The invention belongs to the technical field of teaching aids, and particularly relates to a probability model teaching aid for mathematical teaching, which comprises a shell, a fixed seat and a partition plate, wherein the middle part of the fixed seat is fixedly connected with the partition plate; the side walls at two sides of the fixed plate and the partition plates are separated by uniformly arranged side plates to form a plurality of cavities, slide plates in inclined design are connected in the cavities in a sliding manner, and a first elastic piece is fixedly connected between the lower surface of each slide plate and the bottom of the fixed seat; through holes which are uniformly distributed are formed in the side wall of the fixed seat; sealing plates are connected to the outer surfaces of the two sides of the fixed seat in a sliding mode, movable plates are hinged to the upper ends of the inner walls of the left side and the right side of the shell, a third elastic piece is fixedly connected between one end of each movable plate and the inner wall of the upper end of the shell, and a pull rope is arranged at the other end of each movable plate; the structure of the invention can realize the continuous casting of the coins, throw out a plurality of coins at one time, increase the number of experiments, reduce the operation time of the experiments, facilitate the execution of a large number of repeated experiments, and improve the efficiency of the experiments and the accuracy of the statistical results of the experiments.

Description

Probability model teaching aid for mathematical education

Technical Field

The invention belongs to the technical field of teaching aids, and particularly relates to a probability model teaching aid for mathematical teaching.

Background

Probability, also called probability, chance rate, probability (probability) or likelihood, is the basic concept of probability theory. Probability is a measure of the likelihood of a random event occurring and generally represents the magnitude of the likelihood of an event occurring in a real number between 0 and 1. The closer to 1, the more likely the event is to occur; the closer to 0, the less likely the event is to occur, which is an objective demonstration, not subjective verification.

In high-class mathematics of universities, teachers giving lessons often perform practical probability demonstration experiments to enable students to learn knowledge in the aspect of probability more intuitively, wherein the most common experiment is coin throwing experiments, namely, the probability that the front face and the back face of a coin face upwards is counted to be half. At present, in the experiment process, a teacher is required to throw out coins for multiple times, counting is carried out beside another person, and due to the fact that the number of times of experiments is large, a large amount of manpower and time are required to be consumed, and the experiment efficiency is low.

Some technical schemes related to probability model teaching aids also appear in the prior art, for example, a Chinese patent with the application number of CN201610833221.6 discloses a mechanical coin throwing device for mathematical probability, which comprises a coin throwing main body and a coin storing main body; the coin storing body is positioned at the upper left part of the coin throwing body; the coin throwing main body comprises a coin throwing cylinder, a coin throwing spring and an ejection plate; the coin throwing cylinder is integrally a hollow cylinder and comprises a base plate, a straight cylinder and a bent cylinder, and the coin storing main body comprises a coin storing shell, a push plate and a push motor. The coin ejecting device can automatically push the coins to the designated ejecting position, and then the coins are ejected continuously manually by people without taking the coins continuously by people; however, the device can throw one coin at a time, so that the experimental efficiency is low, and a large number of repeated experiments are inconvenient to carry out; and the casting angle and the casting force of the coin can not be changed, so that the experimental data has unicity, and the feasibility of the experimental data is reduced.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that in the experiment process, because the number of times of experiments is large, a large amount of manpower and time are consumed when a coin is thrown, the experiment efficiency is low, the throwing angle and the throwing force of the coin are not changed, so that the experiment data has singleness, and the feasibility of the experiment data is reduced, the invention provides a probability model teaching aid for mathematical teaching.

The technical scheme adopted by the invention for solving the technical problems is as follows: the probability model teaching aid for mathematical teaching comprises a shell, a fixed seat and a partition plate, wherein the shell is designed in a cubic structure, the middle part of the upper end of the shell is fixedly connected with the fixed seat with a U-shaped vertical section, and the middle part of the fixed seat is fixedly connected with the partition plate; the upper ends of the side walls of the partition plate and the fixed seat penetrate through the design of the shell, the upper end of one side surface of the partition plate, which is opposite to the side wall of the fixed seat, is provided with a groove, a cover plate is connected in the groove in a sliding manner, and the cover plate is positioned above the shell; the side walls at two sides of the fixed plate and the partition plates are separated by uniformly arranged side plates to form a plurality of cavities, slide plates in inclined design are connected in the cavities in a sliding manner, and a first elastic piece is fixedly connected between the lower surface of each slide plate and the bottom of the fixed seat; through holes are uniformly distributed on the side wall of the fixed seat, the through holes and the cavities are arranged in a one-to-one correspondence manner, the through holes are positioned above the sliding plate, and the through holes are designed in an inclined manner; sealing plates are connected to the outer surfaces of the two sides of the fixing seat in a sliding mode and used for sealing the through holes, limiting plates are arranged below the sealing plates, and second elastic pieces which are uniformly arranged are fixedly connected between the sealing plates and the limiting plates; the upper ends of the inner walls of the left side and the right side of the shell are hinged with movable plates, a third elastic piece is fixedly connected between one end of each movable plate and the inner wall of the upper end of the shell, and a pull rope is arranged at the other end of each movable plate; a sliding plate is connected in the shell below the fixed seat in a sliding manner, one end of the pull rope is fixedly connected with the sliding plate, and an electric telescopic rod is fixedly connected between the lower surface of the sliding plate and the inner wall of the bottom of the shell;

when the coin stacking device works, a batch of coins are stacked above the sliding plate, the coins downwards extrude the first elastic piece to be in a compressed state, the uppermost coins of the sliding plate are controlled to be in the positions of the through holes, one ends of the coins obliquely fall into the through holes, at the moment, the coins cannot fall off due to the fact that the through holes are sealed by the sealing plate, and meanwhile, the cover plate is slid to enable the cover plate to seal the space above the coins, so that interference of external factors is reduced; controlling the electric telescopic rod to move, when the electric telescopic rod drives the sliding plate to move downwards quickly, pulling the movable plate to rotate towards the direction close to the sealing plate by the pull rope until one end of the movable plate is contacted with the sealing plate and drives the sealing plate to move downwards, the sealing plate moves downwards to open the through hole, the uppermost batch of coins fall from the through hole to one end of the movable plate under the action of gravity, meanwhile, controlling the electric telescopic rod to drive the sliding plate to move upwards quickly, the movable plate rotates to return to the initial position under the action of the pulling force of a third elastic piece, the movable plate drives the coins to move when rotating to enable the movable plate to return to the initial position, the coins are thrown out of the upper end of the shell, meanwhile, the sealing plate and the sliding plate move upwards under the elastic action of the second elastic piece and the first elastic piece, when the sliding plate moves upwards, the uppermost coins are enabled to enter the through hole, and the sealing plate moves upwards to seal the through hole; repetitive motion drives the fly leaf through electric telescopic handle motion and rotates to make slide top coin drop to the fly leaf in succession, realize throwing in succession of coin, and through the setting of curb plate and cavity, make the fly leaf throw out many pieces of coins for the last time, thereby effectively increase experiment quantity, reduce experiment operating time, be convenient for going on of a large amount of repeated experiments, improve the accuracy of experimental efficiency and experimental statistics result.

Preferably, a placing groove is formed in the upper end of the partition plate, an air bag is arranged in the placing groove, a pressing plate is connected above the air bag in a sliding manner, the upper surface of the pressing plate is fixedly connected with a spring on the inner wall of the placing groove, the lower surface of the pressing plate is fixedly connected with an elastic rope, and one end of the elastic rope penetrates through the air bag and the partition plate to be fixedly connected with the upper surface of the sliding plate; guide grooves are uniformly distributed on two sides of the placing groove, obliquely designed ejector rods are arranged in the guide grooves, the inclination directions of the ejector rods and the through holes are consistent, the ejector rods are made of elastic rubber materials, cavities are formed in the ejector rods, and the cavities are communicated with the interior of the air bag; during operation, electric telescopic handle drives the sliding plate and moves down, and the fly leaf rotates and makes the through-hole open, and the sliding plate moves down simultaneously and moves down through elastic cord pulling pressure plate and move down, and the clamp plate moves down during the extrusion gasbag internal gas gets into the inside cavity of ejector pin to make the ejector pin inflation extend, the ejector pin outwards extends the back extrusion coin and moves down, thereby the coin drops to the speed of dropping on the fly leaf from the through-hole with higher speed, prevents to have the coin card to block in through-hole department, influences the normal operating of device.

Preferably, a stop block is arranged on the upper surface of one end, opposite to the fixed seat, of the movable plate, a pressure sensor is arranged on the side surface, opposite to the fixed seat, of the stop block, and the pressure sensor is electrically connected with a control system for driving the electric telescopic rod to move; during operation, electric telescopic handle motion drives the fly leaf and rotates and make the through-hole open, and the coin drops back and dog and pressure sensor contact on the fly leaf from the through-hole, and pressure sensor senses and controls electric telescopic handle drive the sliding plate and shift up rapidly behind the coin to effectively improve the sensitivity of device, guarantee the harmony of quality motion.

Preferably, the lower surface of one end of the movable plate, which is opposite to the fixed seat, is fixedly connected with fixed blocks which are uniformly arranged, the fixed blocks are rotatably connected with the same rotating shaft, one end of the rotating shaft is fixedly connected with a clamping block, one side of the movable plate is provided with a clamping groove, the clamping block is arranged corresponding to the clamping groove, and one end of the pull rope is fixedly connected with the rotating shaft; when the clamping device works, the clamping block and the rotating shaft are pulled outwards to enable the clamping block to leave the clamping groove, meanwhile, the rotating shaft is rotated to enable the pull rope to be wound on the rotating shaft, so that the length of the pull rope can be adjusted, and after the length of the pull rope is adjusted, the clamping block is aligned to the clamping groove, and the clamping block and the rotating shaft are pushed to enable the clamping block to be clamped into the clamping groove to be fixed; the angle that locates when can change fly leaf initial condition through adjustment stay cord length, simultaneous control electric telescopic handle telescopic motion's at every turn time is the same to can adjust the throwing angle and the dynamics of throwing of coin, be convenient for set up the experiment contrast group, the test difference throws the angle and throws the experimental result under the dynamics, richenes experimental data, improves the credibility of experimental result.

Preferably, the two sides of the shell are provided with the collecting boxes, and the inner wall of the bottom of each collecting box is provided with a sponge layer; the during operation is collected the box through setting up and is collected the arrangement to the coin that casts, prevents that the coin from rolling to farther place, sets up the sponge layer simultaneously and effectively weakens the noise that the coin bumps the production with ground when dropping.

Preferably, an installation groove with an L-shaped section is formed in the side wall of the collection box, which is far away from the electric telescopic rod, a clamping frame in a J-shaped design is connected in the installation groove in a sliding mode, and a fourth elastic piece is fixedly connected between the clamping frame and the inner wall of the installation groove; the side walls of two sides of the shell are provided with accommodating grooves, the accommodating grooves are arranged corresponding to the collecting box, connecting grooves with L-shaped sections are arranged above the accommodating grooves, and the connecting grooves are arranged corresponding to the card frame; during operation, can put into the casing bottom collecting the box through accomodating the groove, be convenient for collect accomodating of box and deposit, and when mounting groove and spread groove are aligned, stir the card frame upwards, card frame upper end gets into the spread groove, and the fourth elastic component is in compression state, and the box is collected to the direction pulling of keeping away from electric telescopic handle simultaneously and card frame makes card frame upper end card go into inside the spread groove to can collect the box and fix.

The invention has the following beneficial effects:

1. according to the probability model teaching aid for mathematical teaching, the fixed seat, the movable plate, the sliding plate and the electric telescopic rod are arranged, the movable plate is driven to rotate through the movement of the electric telescopic rod, so that coins above the sliding plate continuously drop onto the movable plate, the coins are continuously cast, and a plurality of coins are cast by the movable plate at the last time through the arrangement of the side plates and the cavity, so that the experiment quantity is effectively increased, the experiment operation time is shortened, a large number of repeated experiments are facilitated, and the experiment efficiency and the accuracy of the experiment statistical result are improved.

2. According to the probability model teaching aid for mathematical teaching, the air bag, the pressing plate and the ejector rod are arranged, when the sliding plate moves downwards, the pressing plate is pulled to move downwards through the elastic rope, the pressing plate moves downwards to extrude gas in the air bag to enter a cavity in the ejector rod, so that the ejector rod expands and extends, the ejector rod extrudes coins to move downwards after extending outwards, the falling speed of the coins from the through hole to the movable plate is accelerated, and the coins are prevented from being clamped in the through hole to influence the normal operation of the device.

3. According to the probability model teaching aid for mathematical teaching, the fixed block, the rotating shaft, the clamping block and the clamping groove are arranged, the clamping block and the rotating shaft are pulled outwards to enable the clamping block to be separated from the clamping groove, meanwhile, the rotating shaft is rotated to enable the pull rope to be wound on the rotating shaft to adjust the length of the pull rope, and after the length of the pull rope is adjusted, the clamping block is aligned to the clamping groove and pushes the clamping block and the rotating shaft to enable the clamping block to be clamped into the clamping groove to be fixed; the angle that locates when can change fly leaf initial condition through adjustment stay cord length, simultaneous control electric telescopic handle telescopic motion's at every turn time is the same to can adjust the throwing angle and the dynamics of throwing of coin, be convenient for set up the experiment contrast group, the test difference throws the angle and throws the experimental result under the dynamics, richenes experimental data, improves the credibility of experimental result.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the electric telescopic rod moving downward according to the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at B;

FIG. 6 is an enlarged view of a portion of FIG. 3 at C;

in the figure: the device comprises a shell 1, a movable plate 11, a third elastic element 12, a pull rope 13, a sliding plate 14, an electric telescopic rod 15, a stop 16, a pressure sensor 17, a containing groove 18, a connecting groove 19, a fixed seat 2, a groove 21, a cover plate 22, a side plate 23, a sliding plate 24, a first elastic element 25, a through hole 26, a sealing plate 27, a limiting plate 28, a second elastic element 29, a partition plate 3, a placing groove 31, an air bag 32, a pressing plate 33, an elastic rope 34, a guide groove 35, a mandril 36, a cavity 37, a spring 38, a fixed block 4, a rotating shaft 41, a clamping block 42, a clamping groove 43, a collecting box 5, a mounting groove 51, a clamping frame 52 and a fourth elastic element 53.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, the probabilistic model teaching aid for mathematical education according to the present invention comprises a shell 1, a fixing base 2, and a spacer 3, wherein the shell 1 is designed in a cubic structure, the fixing base 2 having a u-shaped vertical cross-section is fixedly connected to the middle of the upper end of the shell 1, and the spacer 3 is fixedly connected to the middle of the fixing base 2; the upper ends of the side walls of the partition board 3 and the fixed seat 2 penetrate through the shell 1, the upper end of the side surface of one side of the partition board 3 opposite to the side wall of the fixed seat 2 is provided with a groove 21, a cover plate 22 is connected in the groove 21 in a sliding mode, and the cover plate 22 is located above the shell 1; a plurality of cavities are formed between the side walls at the two sides of the fixed plate and the partition plates 3 by virtue of the side plates 23 which are uniformly arranged, slide plates 24 which are designed to be inclined are connected in each cavity in a sliding manner, and a first elastic piece 25 is fixedly connected between the lower surface of each slide plate 24 and the bottom of the fixed seat 2; through holes 26 are uniformly arranged on the side wall of the fixed seat 2, the through holes 26 are arranged in one-to-one correspondence with the cavities, the through holes 26 are positioned above the sliding plate 24, and the through holes 26 are designed in an inclined manner; sealing plates 27 are connected to the outer surfaces of two sides of the fixed seat 2 in a sliding manner, the sealing plates 27 are used for sealing the through holes 26, a limiting plate 28 is arranged below the sealing plates 27, and second elastic pieces 29 which are uniformly arranged are fixedly connected between the sealing plates 27 and the limiting plate 28; the upper ends of the inner walls of the left side and the right side of the shell 1 are hinged with movable plates 11, a third elastic element 12 is fixedly connected between one end of each movable plate 11 and the inner wall of the upper end of the shell 1, and a pull rope 13 is arranged at the other end of each movable plate; a sliding plate 14 is connected to the position below the fixed seat 2 in the shell 1 in a sliding manner, one end of the pull rope 13 is fixedly connected with the sliding plate 14, and an electric telescopic rod 15 is fixedly connected between the lower surface of the sliding plate 14 and the inner wall of the bottom of the shell 1;

when the coin stacking device works, a batch of coins are stacked above the sliding plate 24, the coins downwards extrude the first elastic piece 25 to be in a compressed state, the uppermost coins of the sliding plate 24 are controlled to be in the positions of the through holes 26, one ends of the coins obliquely fall into the through holes 26, at the moment, the coins cannot fall off due to the fact that the sealing plate 27 seals the through holes 26, and meanwhile, the cover plate 22 is slid to enable the cover plate 22 to seal the space above the coins, so that interference of external factors is reduced; the electric telescopic rod 15 is controlled to move, when the electric telescopic rod 15 drives the sliding plate 14 to move downwards rapidly, the pulling rope 13 pulls the movable plate 11 to rotate towards the direction close to the sealing plate 27 until one end of the movable plate 11 contacts with the sealing plate 27 and drives the sealing plate 27 to move downwards, the sealing plate 27 moves downwards to open the through hole 26, the uppermost coin falls from the through hole 26 to one end of the movable plate 11 under the action of gravity, meanwhile, the electric telescopic rod 15 drives the sliding plate 14 to move up rapidly, the movable plate 11 rotates to return to the initial position under the pulling force of the third elastic member 12, the movable plate 11 rotates to drive the movement of the coins so that the coins are thrown out of the upper end of the housing 1 when the movable plate 11 returns to the initial position, meanwhile, the sealing plate 27 and the sliding plate 24 move upwards under the elastic action of the second elastic member 29 and the first elastic member 25, when the sliding plate 24 moves upwards, the uppermost coin moves upwards to enter the through hole 26, and the sealing plate 27 moves upwards to seal the through hole 26; repetitive motion drives fly leaf 11 through electric telescopic handle 15 motion and rotates to make slide 24 top coins drop to fly leaf 11 in succession, realize throwing in succession of coin, and through the setting of curb plate 23 and cavity, make fly leaf 11 throw out many pieces of coins last time, thereby effectively increase experimental quantity, reduce experiment operating time, be convenient for go on of a large amount of repeated experiments, improve the accuracy of experimental efficiency and experimental statistics result.

As an embodiment of the invention, a placing groove 31 is formed at the upper end of the partition plate 3, an air bag 32 is arranged in the placing groove 31, a pressing plate 33 is connected above the air bag 32 in a sliding manner, a spring 38 is fixedly connected to the upper surface of the pressing plate 33 and the inner wall of the placing groove 31, an elastic rope 34 is fixedly connected to the lower surface of the pressing plate 33, and one end of the elastic rope 34 penetrates through the air bag 32 and the partition plate 3 to be fixedly connected with the upper surface of the sliding plate 14; guide grooves 35 are uniformly distributed on two sides of the placing groove 31, ejector rods 36 which are designed in an inclined mode are arranged in the guide grooves 35, the inclination directions of the ejector rods 36 and the through holes 26 are consistent, the ejector rods 36 are made of elastic rubber materials, cavities 37 are formed in the ejector rods 36, and the cavities 37 are communicated with the inside of the air bag 32; during operation, electric telescopic handle 15 drives sliding plate 14 and moves down, fly leaf 11 rotates and makes through-hole 26 open, sliding plate 14 moves down simultaneously and moves down through elastic rope 34 pulling clamp plate 33, during the inside cavity 37 of extrusion gasbag 32 entering ejector pin 36 when clamp plate 33 moves down, thereby make ejector pin 36 inflation extend, ejector pin 36 extrudees the coin after outwards extending and moves down, thereby the coin drops to the speed of dropping on fly leaf 11 from through-hole 26 with higher speed, prevent that there is the coin card in through-hole 26 department, influence the normal operating of device.

As an embodiment of the present invention, a stopper 16 is disposed on an upper surface of one end of the movable plate 11 opposite to the fixed seat 2, a pressure sensor 17 is disposed on a side surface of the stopper 16 opposite to the fixed seat 2, and the pressure sensor 17 is electrically connected to a control system for driving the electric telescopic rod 15 to move; during operation, electric telescopic handle 15 moves and drives fly leaf 11 and rotate and make through-hole 26 open, and the coin drops on fly leaf 11 from through-hole 26 back and contact with dog 16 and pressure sensor 17, and pressure sensor 17 senses the coin and then controls electric telescopic handle 15 and drive sliding plate 14 and shift up rapidly to effectively improve the sensitivity of device, guarantee the harmony of quality motion.

As an embodiment of the present invention, the lower surface of one end of the movable plate 11, which is opposite to the fixed seat 2, is fixedly connected with fixed blocks 4 which are uniformly arranged, the fixed blocks 4 are rotatably connected with a same rotating shaft 41, one end of the rotating shaft 41 is fixedly connected with a clamping block 42, one side of the movable plate 11 is provided with a clamping groove 43, the clamping block 42 is arranged corresponding to the clamping groove 43, and one end of the pull rope 13 is fixedly connected with the rotating shaft 41; when the device works, the fixture block 42 and the rotating shaft 41 are pulled outwards to enable the fixture block 42 to leave the clamping groove 43, meanwhile, the rotating shaft 41 is rotated to enable the pull rope 13 to be wound on the rotating shaft 41, the length of the pull rope 13 can be adjusted, after the length of the pull rope 13 is adjusted, the fixture block 42 is aligned to the clamping groove 43, and the fixture block 42 and the rotating shaft 41 are pushed to enable the fixture block 42 to be clamped into the clamping groove 43 for fixation; through the angle that locates when adjusting 13 length of stay cord can change fly leaf 11 initial condition, the time of 15 telescopic motion at every turn of simultaneous control electric telescopic handle is the same to can adjust the throwing angle and the dynamics of throwing of coin, be convenient for set up the experiment contrast group, the test difference throws the angle and throws the experimental result under the dynamics, richenes experimental data, improves the credibility of experimental result.

As an embodiment of the invention, two sides of the shell 1 are provided with the collecting boxes 5, and the inner walls of the bottoms of the collecting boxes 5 are provided with sponge layers; during operation collects box 5 through the setting and collects the arrangement to the coin that casts, prevents that the coin from rolling to farther place, sets up the sponge layer simultaneously and effectively weakens the noise that the coin bumps with ground when dropping and produces.

As an embodiment of the invention, an installation groove 51 with an L-shaped cross section is formed in a side wall of the collection box 5 on one side away from the electric telescopic rod 15, a clip frame 52 with a ']' shape is slidably connected in the installation groove 51, and a fourth elastic member 53 is fixedly connected between the clip frame 52 and the inner wall of the installation groove 51; the side walls of two sides of the shell 1 are provided with accommodating grooves 18, the accommodating grooves 18 are arranged corresponding to the collecting box 5, connecting grooves 19 with L-shaped sections are arranged above the accommodating grooves 18, and the connecting grooves 19 are arranged corresponding to the clamping frames 52; during operation, can put into casing 1 bottom with collecting box 5 through accomodating groove 18, be convenient for collect accomodating of box 5 and deposit, and when mounting groove 51 and spread groove 19 were aimed at, stir card frame 52 upwards, card frame 52 upper end gets into spread groove 19, and fourth elastic component 53 is in compression state, and the direction pulling that keeps away from electric telescopic handle 15 simultaneously collects box 5 and card frame 52 and makes card frame 52 upper end card go into inside the fixed box 5 that can collect of spread groove 19.

The specific working process of the invention is as follows:

when the coin stacking device works, a batch of coins are stacked above the sliding plate 24, the coins downwards extrude the first elastic piece 25 to be in a compressed state, the uppermost coins of the sliding plate 24 are controlled to be in the positions of the through holes 26, one ends of the coins obliquely fall into the through holes 26, at the moment, the coins cannot fall off due to the fact that the sealing plate 27 seals the through holes 26, and meanwhile, the cover plate 22 is slid to enable the cover plate 22 to seal the space above the coins, so that interference of external factors is reduced; the electric telescopic rod 15 is controlled to move, when the electric telescopic rod 15 drives the sliding plate 14 to move downwards rapidly, the pulling rope 13 pulls the movable plate 11 to rotate towards the direction close to the sealing plate 27 until one end of the movable plate 11 contacts with the sealing plate 27 and drives the sealing plate 27 to move downwards, the sealing plate 27 moves downwards to open the through hole 26, the uppermost coin falls from the through hole 26 to one end of the movable plate 11 under the action of gravity, meanwhile, the electric telescopic rod 15 drives the sliding plate 14 to move up rapidly, the movable plate 11 rotates to return to the initial position under the pulling force of the third elastic member 12, the movable plate 11 rotates to drive the movement of the coins so that the coins are thrown out of the upper end of the housing 1 when the movable plate 11 returns to the initial position, meanwhile, the sealing plate 27 and the sliding plate 24 move upwards under the elastic action of the second elastic member 29 and the first elastic member 25, when the sliding plate 24 moves upwards, the uppermost coin moves upwards to enter the through hole 26, and the sealing plate 27 moves upwards to seal the through hole 26; the movable plate 11 is driven to rotate through the movement of the electric telescopic rod 15, so that coins above the sliding plate 24 continuously drop onto the movable plate 11, the continuous casting of the coins is achieved, and the movable plate 11 is enabled to cast a plurality of coins at the last time through the arrangement of the side plates 23 and the cavities, so that the number of experiments is effectively increased, the operation time of the experiments is reduced, a large number of repeated experiments are facilitated, and the experiment efficiency and the accuracy of the statistical result of the experiments are improved;

meanwhile, the sliding plate 14 moves downwards to pull the pressing plate 33 to move downwards through the elastic rope 34, when the pressing plate 33 moves downwards, the air in the air bag 32 is extruded into the cavity 37 inside the ejector rod 36, so that the ejector rod 36 expands and extends, and the ejector rod 36 extrudes the coins to move downwards after extending outwards, so that the falling speed of the coins from the through hole 26 to the movable plate 11 is accelerated, and the coins are prevented from being clamped at the through hole 26 to influence the normal operation of the device; the stopper 16 and the pressure sensor 17 are arranged at the same time, the coins fall onto the movable plate 11 from the through holes 26 and then contact with the stopper 16 and the pressure sensor 17, and the pressure sensor 17 controls the electric telescopic rod 15 to drive the sliding plate 14 to move upwards quickly after sensing the coins, so that the sensitivity of the device is effectively improved, and the coordination of mass motion is ensured;

simultaneously, the fixture block 42 and the rotating shaft 41 are pulled outwards to enable the fixture block 42 to leave the clamping groove 43, the rotating shaft 41 is rotated to enable the pull rope 13 to be wound on the rotating shaft 41, the length of the pull rope 13 can be adjusted, after the length of the pull rope 13 is adjusted, the fixture block 42 is aligned to the clamping groove 43, and the fixture block 42 and the rotating shaft 41 are pushed to enable the fixture block 42 to be clamped into the clamping groove 43 for fixing; the angle of the movable plate 11 in the initial state can be changed by adjusting the length of the stay cord 13, and the time of each telescopic motion of the electric telescopic rod 15 is controlled to be the same, so that the throwing angle and throwing force of the coin can be adjusted, an experiment comparison group can be conveniently set, experimental results under different throwing angles and throwing forces can be tested, experimental data can be enriched, and the credibility of the experimental results can be improved; meanwhile, the collection box 5 is arranged to collect and arrange the thrown coins, so that the coins are prevented from rolling to a farther place, and the sponge layer is arranged to effectively weaken the noise generated by collision between the dropped coins and the ground; and will collect box 5 and put into casing 1 bottom through accomodating groove 18, be convenient for collect accomodating of box 5 and deposit, when mounting groove 51 and connecting groove 19 were aimed at, upwards stir card frame 52, card frame 52 upper end gets into connecting groove 19, and fourth elastic component 53 is in compression state, and the direction pulling that keeps away from electric telescopic handle 15 simultaneously collects box 5 and card frame 52 and makes inside the card frame 52 upper end go into connecting groove 19 and fix can collect box 5.

The partition plate 3 is formed by splicing a plurality of plates, the middle parts of which are provided with empty grooves and the two sides of which are provided with guide grooves 35, so that the plurality of plates are spliced to form the complete partition plate 3 and the placing groove 31, and the pressing plate 33, the spring 38, the air bag 32 and the ejector rod 36 are arranged during the splicing of the plates.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a probability model teaching aid for mathematical education which characterized in that: the U-shaped fixing base is fixedly connected to the middle of the upper end of the shell (1), and the partition plate (3) is fixedly connected to the middle of the fixing base (2); the upper ends of the side walls of the partition plate (3) and the fixed seat (2) penetrate through the shell (1), the upper end of the side surface of one side of the partition plate (3) opposite to the side wall of the fixed seat (2) is provided with a groove (21), a cover plate (22) is connected in the groove (21) in a sliding mode, and the cover plate (22) is located above the shell (1); the side walls at two sides of the fixed plate and the partition plates (3) are separated by side plates (23) which are uniformly arranged to form a plurality of cavities, slide plates (24) which are obliquely connected are slidably connected in the cavities, and first elastic pieces (25) are fixedly connected between the lower surfaces of the slide plates (24) and the bottoms of the fixed seats (2); through holes (26) which are uniformly distributed are formed in the side wall of the fixed seat (2), the through holes (26) and the chambers are arranged in a one-to-one correspondence manner, the through holes (26) are positioned above the sliding plate (24), and the through holes (26) are designed in an inclined manner; sealing plates (27) are connected to the outer surfaces of two sides of the fixing seat (2) in a sliding mode, the sealing plates (27) are used for sealing the through holes (26), a limiting plate (28) is arranged below the sealing plates (27), and second elastic pieces (29) which are uniformly arranged are fixedly connected between the sealing plates (27) and the limiting plate (28); the upper ends of the inner walls of the left side and the right side of the shell (1) are hinged with movable plates (11), a third elastic piece (12) is fixedly connected between one end of each movable plate (11) and the inner wall of the upper end of the shell (1), and a pull rope (13) is arranged at the other end of each movable plate; a sliding plate (14) is connected to the position, below the fixed seat (2), in the shell (1) in a sliding mode, one end of the pull rope (13) is fixedly connected with the sliding plate (14), and an electric telescopic rod (15) is fixedly connected between the lower surface of the sliding plate (14) and the inner wall of the bottom of the shell (1).

2. The probabilistic model teaching aid for mathematical education of claim 1, wherein: a placing groove (31) is formed in the upper end of the partition plate (3), an air bag (32) is arranged in the placing groove (31), a pressing plate (33) is connected above the air bag (32) in a sliding mode, a spring (38) is fixedly connected to the upper surface of the pressing plate (33) and the inner wall of the placing groove (31), an elastic rope (34) is fixedly connected to the lower surface of the pressing plate (33), and one end of the elastic rope (34) penetrates through the air bag (32) and the partition plate (3) to be fixedly connected with the upper surface of the sliding plate (14); evenly distributed's guide slot (35) are seted up to standing groove (31) both sides, all be equipped with ejector pin (36) of slope design in guide slot (35), ejector pin (36) are unanimous with through-hole (26) incline direction, ejector pin (36) are made for elastic rubber material, cavity (37) have been seted up to ejector pin (36) inside, cavity (37) all communicate with gasbag (32) inside.

3. The probabilistic model teaching aid for mathematical education of claim 1, wherein: the movable plate (11) is provided with a stop block (16) relative to the upper surface of one end of the fixed seat (2), the stop block (16) is provided with a pressure sensor (17) relative to the side face of one side of the fixed seat (2), and the pressure sensor (17) is electrically connected with a control system for driving the electric telescopic rod (15) to move.

4. The probabilistic model teaching aid for mathematical education of claim 1, wherein: fly leaf (11) have linked firmly fixed block (4) of evenly arranging for the one end lower surface of fixing base (2), fixed block (4) internal rotation is connected with same axis of rotation (41), axis of rotation (41) one end has linked firmly fixture block (42), draw-in groove (43) have been seted up to fly leaf (11) one side, fixture block (42) correspond the setting with draw-in groove (43), stay cord (13) one end links firmly with axis of rotation (41).

5. The probabilistic model teaching aid for mathematical education of claim 1, wherein: the collecting box is characterized in that collecting boxes (5) are arranged on two sides of the shell (1), and sponge layers are arranged on the inner walls of the bottoms of the collecting boxes (5).

6. The probabilistic model teaching aid for mathematical education of claim 5, wherein: a mounting groove (51) with an L-shaped section is formed in the side wall of the collecting box (5) far away from the electric telescopic rod (15), a clip frame (52) in an L-shaped design is connected in the mounting groove (51) in a sliding manner, and a fourth elastic piece (53) is fixedly connected between the clip frame (52) and the inner wall of the mounting groove (51); casing (1) both sides lateral wall has been seted up on the lateral wall and has been accomodate groove (18), it corresponds the setting with collection box (5) to accomodate groove (18), it is equipped with spread groove (19) that the cross-section is "L" shape design to accomodate groove (18) top, spread groove (19) correspond the setting with card frame (52).