CN210722036U

CN210722036U - Probability demonstration teaching aid for college mathematics

Info

Publication number: CN210722036U
Application number: CN201922020931.9U
Authority: CN
Inventors: 赵岚; 刘淑芬
Original assignee: Institute Of Technology East China Jiao Tong University
Current assignee: Institute Of Technology East China Jiao Tong University
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-06-09
Anticipated expiration: 2029-11-21

Abstract

The utility model relates to a teaching demonstration teaching aid field specifically discloses a probability demonstration teaching aid for college mathematics, needs to consume a large amount of manpowers to current probability demonstration teaching aid, and demonstration efficiency is lower, need consume a large amount of time statistics demonstration results moreover, the poor problem of practicality, the following scheme of present proposition, it includes the base, the top of base all is fixed with the bracing piece all around, is fixed with the demonstration case between the top of bracing piece, and a plurality of play ball holes have been seted up to the bottom of demonstration case, and the bottom of going out the ball hole all is fixed with collection ball pipe, and the below of collection ball pipe is provided with the diaphragm that the slip cover was equipped with on the bracing piece, and the below of diaphragm is provided with a plurality of cover respectively and locates the coupling spring on the bracing. The utility model relates to a novelty, the structure is ingenious, and easy operation both made things convenient for the discharge demonstration ball, be convenient for again record and make statistics of the demonstration result, can control goal hole intermittent type nature continuous goal simultaneously, can effectively practice thrift the manual work, is favorable to improving demonstration efficiency.

Description

Probability demonstration teaching aid for college mathematics

Technical Field

The utility model relates to a teaching demonstration teaching aid technical field especially relates to a probability demonstration teaching aid for college mathematics.

Background

University mathematics, also commonly called calculus, learns mainly derivatives, integrals, functions and approximate limits as the name implies, and of course, there are many connections among them, and learning is best by contrast. In the tradition teaching process, mostly the simple dependence theory of teacher explains and explains, the student is difficult to master relevant knowledge, therefore need probability presentation device to assist the teaching, but present probability presentation teaching aid is mostly through using one piece of coin to throw, carry out simple statistics behind the number of times that the rethread record positive and negative takes place, need consume a large amount of manpowers, the demonstration efficiency is lower, and need consume a large amount of time statistics demonstration results, the practicality is poor, therefore need we to design a probability demonstration teaching aid for college mathematics, solve these problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of probability demonstration teaching aid for college mathematics has solved current probability demonstration teaching aid and need consume a large amount of manpowers, and demonstration efficiency is lower, need consume a large amount of time statistics demonstration results moreover, the poor problem of practicality.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

probability demonstration teaching aid for college mathematics, the on-line screen storage device comprises a base, the top of base all is fixed with the bracing piece all around, be fixed with the demonstration case between the top of bracing piece, a plurality of ball holes have been seted up to the bottom of demonstration case, the bottom in ball hole all is fixed with ball collecting tube, ball collecting tube's below is provided with the slide sleeve and is equipped with the diaphragm on the bracing piece, the below of diaphragm is provided with a plurality of connecting spring that overlap respectively on locating the bracing piece, servo motor is installed to the top right-hand member of demonstration case, servo motor's output shaft extends to the inside of demonstration case and the transmission is connected with the cam, the top right-hand member of demonstration case is fixed with the fixed plate, ball inlet has been seted up at the top middle part of demonstration case, ball inlet's bottom sliding connection has the baffle, the right-hand member of baffle is fixed with two guide bars, the right-hand member of.

Preferably, the upper end and the lower end of the connecting spring are respectively fixedly connected with the transverse plate and the base, the transverse plate is provided with four sliding holes, and the supporting rod is respectively connected with the inner walls of the sliding holes in a sliding manner.

Preferably, the ball collecting pipes are made of transparent hard materials and are located among the four support rods.

Preferably, the demonstration box is of a cavity structure, the fixing plate is located between the baffle and the connecting plate, and the connecting plate is located between the fixing plate and the cam.

Preferably, the left end and the right end of the reset spring are respectively and fixedly connected with the fixed plate and the connecting plate, two guide holes are formed in the fixed plate, and the two guide rods are respectively and slidably connected with the inner walls of the two guide holes.

Preferably, a storage hopper is fixed to the top of the ball inlet, and the size of the baffle is larger than that of the ball inlet.

The utility model has the advantages that:

1. the servo motor controls the cam to rotate, so that the guide rod drives the baffle to be stably close to or far away from the goal hole under the elastic action of the return spring, and intermittent continuous goal of the goal hole can be controlled;

2. through drawing the pine diaphragm, under connecting spring's elastic action for the diaphragm is steadily close to or keeps away from ball collecting tube, and the demonstration ball of conveniently discharging because ball collecting tube is made by transparent hard material, conveniently records and makes statistics of the demonstration result.

The utility model relates to a novelty, the structure is ingenious, and easy operation both made things convenient for the discharge demonstration ball, be convenient for again take notes and statistics of demonstration result, can control goal hole intermittent type nature continuous goal simultaneously, can effectively practice thrift the manual work, is favorable to improving demonstration efficiency, suitable popularization.

Drawings

Figure 1 is the utility model provides a probability demonstration teaching aid for university's mathematics front view.

Figure 2 is the utility model provides a probability demonstration teaching aid for university's mathematics plan view.

In the figure: the device comprises a base 1, a support rod 2, a demonstration box 3, a ball outlet 4, a ball collecting tube 5, a transverse plate 6, a connecting spring 7, a servo motor 8, a cam 9, a fixing plate 10, a ball inlet 11, a baffle 12, a guide rod 13, a connecting plate 14, a return spring 15 and a storage hopper 16.

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.

Referring to fig. 1-2, a probability demonstration teaching aid for college mathematics comprises a base 1, wherein support rods 2 are fixed on the periphery of the top of the base 1, a demonstration box 3 is fixed between the top ends of the support rods 2, a plurality of ball outlet holes 4 are formed in the bottom of the demonstration box 3, ball collecting pipes 5 are fixed at the bottom ends of the ball outlet holes 4, a transverse plate 6 on the support rods 2 is slidably sleeved below the ball collecting pipes 5, a plurality of connecting springs 7 respectively sleeved on the support rods 2 are arranged below the transverse plate 6, a servo motor 8 is installed at the right end of the top of the demonstration box 3, an output shaft of the servo motor 8 extends into the demonstration box 3 and is in transmission connection with a cam 9, a fixed plate 10 is fixed at the right end of the top of the demonstration box 3, a ball inlet hole 11 is formed in the middle part of the top of the demonstration box 3, a baffle plate 12 is slidably connected to the bottom of the, the right end of the guide rod 13 penetrates through the fixing plate 10 and is fixed with a connecting plate 14, and two return springs 15 respectively sleeved on the guide rod 13 are arranged between the connecting plate 14 and the fixing plate 10.

In this embodiment, the demonstration box 3 is a cavity structure, the fixing plate 10 is located between the baffle 12 and the connecting plate 14, the connecting plate 14 is located between the fixing plate 10 and the cam 9, the left and right ends of the return spring 15 are respectively fixedly connected with the fixing plate 10 and the connecting plate 14, two guide holes are formed on the fixing plate 10, two guide rods 13 are respectively slidably connected with the inner walls of the two guide holes, a storage hopper 16 is fixed on the top of the ball inlet hole 11, the size of the baffle 12 is larger than that of the ball inlet hole 11, the servo motor 8 is electrically connected with a power supply through a wire, the servo motor 8 can be powered and controlled to be switched on and off by switching on the power supply, when in use, an operator controls the cam 9 to rotate by starting the servo motor 8, when the protruding part of the cam 9 contacts with the right end of the connecting plate 14, the guide rods 13 drive the baffle 12 to move steadily, the baffle 12 is positioned right below the ball inlet hole 11, and the baffle 12 blocks the ball inlet hole 11 at the moment because the size of the baffle 12 is larger than that of the ball inlet hole 11; when the convex part of the cam 9 is far away from the connecting plate 14, under the elastic action of the return spring 15, the guide rod 13 drives the baffle plate 12 to be steadily far away from the goal hole 11, so that the demonstration ball in the storage hopper 16 enters the demonstration box 3 through the goal hole 11, and intermittent continuous goal of the goal hole 11 can be controlled.

In the embodiment, the upper end and the lower end of the connecting spring 7 are respectively fixedly connected with the transverse plate 6 and the base 1, the transverse plate 6 is provided with four sliding holes, the supporting rods 2 are respectively connected with the inner walls of the sliding holes in a sliding manner, the ball collecting tubes 5 are all made of transparent hard materials, the ball collecting tubes 5 are all positioned between the four supporting rods 2, when the demonstration box is used, demonstration balls in the demonstration box 3 randomly enter the ball collecting tubes 5 through the ball outlet holes 4, the transverse plate 6 is stably descended under the limiting action of the supporting rods 2 by pulling the transverse plate 6 after the demonstration is finished, the connecting spring 7 is in a compression state at the moment, when the distance between the top of the transverse plate 6 and the bottom end of the ball collecting tube 5 is larger than the diameter of the demonstration balls, the demonstration balls can be discharged from between the ball collecting tubes 5 and the transverse plate 6, after the demonstration balls in the ball collecting tube 5 are all discharged, the transverse plate 6 is loosened, and under the elastic action of the connecting spring 7, the transverse plate 6 is stably lifted, so that the ball collecting tube 5 is blocked by the top of the transverse plate 6, and the demonstration balls can be prevented from being discharged out of the ball collecting tube 5.

The utility model discloses in, the fixed mode between the part is in screw fixation or welded fastening. When the device is used, an operator controls the cam to rotate through the servo motor, under the elastic action of the return spring, the guide rod drives the baffle to be stably close to or far away from the goal hole, and intermittent continuous goal of the goal hole can be controlled; through drawing the pine diaphragm, under connecting spring's elastic action for the diaphragm is steadily close to or keeps away from ball collecting tube, and the demonstration ball of conveniently discharging because ball collecting tube is made by transparent hard material, conveniently records and makes statistics of the demonstration result. The utility model relates to a novelty, the structure is ingenious, and easy operation both made things convenient for the discharge demonstration ball, be convenient for again take notes and statistics of demonstration result, can control goal hole intermittent type nature continuous goal simultaneously, can effectively practice thrift the manual work, is favorable to improving demonstration efficiency, suitable popularization.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. Probability demonstration teaching aid for college mathematics, which comprises a base (1) and is characterized in that supporting rods (2) are fixed on the periphery of the top of the base (1), a demonstration box (3) is fixed between the tops of the supporting rods (2), a plurality of ball outlet holes (4) are formed in the bottom of the demonstration box (3), ball collecting pipes (5) are fixed at the bottoms of the ball outlet holes (4), a transverse plate (6) on the supporting rods (2) is slidably sleeved below the ball collecting pipes (5), a plurality of connecting springs (7) respectively sleeved on the supporting rods (2) are arranged below the transverse plate (6), a servo motor (8) is installed at the right end of the top of the demonstration box (3), an output shaft of the servo motor (8) extends into the demonstration box (3) and is connected with a cam (9) in a transmission manner, a fixing plate (10) is fixed at the right end of the top of the demonstration box (3), a ball inlet hole (11) is formed in the middle of the top, the bottom of the ball inlet hole (11) is connected with a baffle (12) in a sliding mode, the right end of the baffle (12) is fixed with two guide rods (13), the right end of each guide rod (13) penetrates through the fixing plate (10) and is fixed with a connecting plate (14), and two reset springs (15) which are respectively sleeved on the guide rods (13) are arranged between the connecting plates (14) and the fixing plates (10).

2. The probability demonstration teaching aid for college mathematics as claimed in claim 1, wherein the upper end and the lower end of the connecting spring (7) are respectively fixedly connected with the transverse plate (6) and the base (1), the transverse plate (6) is provided with four sliding holes, and the support rod (2) is respectively connected with the inner walls of the sliding holes in a sliding manner.

3. A university mathematics probability demonstration teaching aid according to claim 1, characterized in that the ball collecting pipes (5) are made of transparent hard material, and the ball collecting pipes (5) are arranged among the four support rods (2).

4. A university mathematics probability demonstration teaching aid according to claim 1, characterized in that the demonstration box (3) is a cavity structure, the fixing plate (10) is located between the baffle (12) and the connecting plate (14), and the connecting plate (14) is located between the fixing plate (10) and the cam (9).

5. The probability demonstration teaching aid for college mathematics as claimed in claim 1, wherein the left end and the right end of the return spring (15) are respectively and fixedly connected with the fixing plate (10) and the connecting plate (14), the fixing plate (10) is provided with two guide holes, and the two guide rods (13) are respectively and slidably connected with the inner walls of the two guide holes.

6. A university mathematics probability demonstration teaching aid according to claim 1, wherein a storage hopper (16) is fixed on the top of the goal hole (11), and the size of the baffle (12) is larger than that of the goal hole (11).