CN211062295U

CN211062295U - Probability theory mathematics presentation device

Info

Publication number: CN211062295U
Application number: CN201922212403.3U
Authority: CN
Inventors: 张程
Original assignee: Institute Of Technology East China Jiao Tong University
Current assignee: Institute Of Technology East China Jiao Tong University
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-07-21
Anticipated expiration: 2029-12-11

Abstract

The utility model relates to the technical field of teaching aids, in particular to a probability theory mathematics demonstration device, which comprises a base, wherein the top of the base is fixedly connected with a fixed plate positioned at the center of the base, the front side of the fixed plate is provided with a demonstration groove, a stop lever is fixedly connected in the demonstration groove, a groove is correspondingly arranged at the bottom of the base and the position of the demonstration groove, a baffle is fixedly connected below the stop lever in the demonstration groove, the bottom of the groove is provided with a square groove, a baffle is connected in the square groove and close to the position of the groove, a rotating shaft is connected on the baffle and at the left side of the fixed plate, a spring is fixedly connected at the bottom of the baffle and at the right side of the fixed plate, and the problem that the small balls for demonstration can fall into the lattices at the bottom of the Golgin plate after the use of the present Golgin plate is solved by arranging the, at the moment, the problem that the demonstrator is difficult to take out the small ball is solved.

Description

Probability theory mathematics presentation device

Technical Field

The utility model relates to a teaching aid technical field specifically is a probability theory mathematics presentation device.

Background

Probability, also called probability, chance rate, probability (probability) or probability, is a measure of the probability of occurrence of random events, and in high mathematics of universities, teacher in lecture often uses Golgin board to demonstrate in order to make students learn the knowledge of probability more intuitively.

At present, after the Golgin board is used, small balls for demonstration can fall into a grid at the bottom of the Golgin board, and at the moment, if a demonstrator wants to take out the small balls, the demonstrator is difficult, so a probability theory mathematics demonstration device is needed to improve the problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a probability theory mathematics presentation device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a probability theory mathematics demonstration device comprises a base, wherein a fixed plate is fixedly connected with the top of the base and positioned in the center of the base, a demonstration groove is formed in the front of the fixed plate, a stop lever is fixedly connected in the demonstration groove, a groove is correspondingly formed in the bottom of the base and the position of the demonstration groove, a partition plate is fixedly connected in the demonstration groove and positioned below the stop lever, a square groove is formed in the bottom of the groove, a baffle is connected in the square groove and positioned close to the groove, a rotating shaft is connected to the baffle and positioned on the left side of the fixed plate, a spring is fixedly connected to the bottom of the baffle and positioned on the right side of the fixed plate, a discharge groove is formed in the right side of the square groove and positioned below the baffle, a round groove is formed in the top of the square groove and positioned right above the spring, a push rod is connected in the round groove, and limit blocks are fixedly connected, the top of push rod just is located the top fixedly connected with plectane of base, the demonstration inslot just is located the positive fixedly connected with protection casing of baffle, the top of base just is located the left side of fixed plate and is provided with the storage box, be provided with the lid on the storage box.

Preferably, the base and the fixed plate are made of aluminum alloy, and the storage box is made of bonded neodymium iron boron.

Preferably, the stop lever is provided with a plurality of stop levers, and the distance between the adjacent stop levers is matched with the diameter of the ball for demonstration.

Preferably, the baffle is provided with a plurality of and the length of push rod and square groove bottom to the distance looks adaptation of base bottom.

Preferably, the baffle is connected with the square groove, the push rod is connected with the circular groove in a sliding mode, and the baffle is connected with the rotating shaft in a rotating mode.

Preferably, the protection casing is made by transparent ya keli glass and spring and square groove, pivot and square groove, shelves pole and protection casing and baffle and the connected mode of protection casing are fixed connection.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, through setting up the baffle, the push rod, a spring, the plectane, when the bobble falls on the base, press the push rod, the push rod can promote the baffle and rotate downwards, the baffle no longer blocks the recess, the bobble in the recess can be followed the baffle and slided down, and fall into the outer storage box of base through the blown down tank, operating personnel can be comparatively convenient take out the bobble, solved present Golgi board and after using, the bobble of demonstration usefulness can fall in the check of Golgi board bottom, the demonstration personnel if want to take out comparatively difficult problem with the bobble this moment.

2. The utility model discloses in, through setting up the storage box of making by bonding neodymium iron boron materials, bonding neodymium iron boron materials has certain magnetism, and the storage box of making by bonding neodymium iron boron materials can adsorb on the base, makes things convenient for device's removal.

3. The utility model discloses in, through setting up the storage box, the lid, the bobble of experiments is stored in the storage box, prevents that the bobble of experiments usefulness from losing.

Drawings

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is a front sectional view of the circular plate of the present invention when pressed;

FIG. 3 is an enlarged view of the point A of FIG. 1 according to the present invention;

fig. 4 is a side sectional view of the present invention.

In the figure: 1-base, 2-fixing plate, 3-demonstration groove, 4-blocking rod, 5-groove, 6-clapboard, 7-square groove, 8-baffle, 9-rotating shaft, 10-spring, 11-discharging groove, 12-round groove, 13-push rod, 14-limiting block, 15-round plate, 16-protective cover, 17-storage box and 18-box cover.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution:

a probability theory mathematics demonstration device comprises a base 1, a fixed plate 2 is fixedly connected to the top of the base 1 and is positioned at the center of the base 1, the base 1 and the fixed plate 2 are made of aluminum alloy, a storage box 17 is made of bonded neodymium iron boron material, the aluminum alloy is good in corrosion resistance, firm and durable, the service lives of the base 1 and the fixed plate 2 are long, the storage box 17 made of the bonded neodymium iron boron material can be adsorbed on the base 1, the device is convenient to move, a demonstration groove 3 is formed in the front of the fixed plate 2, a blocking rod 4 is fixedly connected in the demonstration groove 3, the blocking rod 4 is provided with a plurality of blocking rods 4, the distance between the adjacent blocking rods 4 is matched with the diameter of a small ball for demonstration, a groove 5 is correspondingly formed in the bottom of the base 1 and the position of the demonstration groove 3, a partition plate 6 is fixedly connected below the blocking rod 4 in the demonstration groove 3, the partition plate 6 is provided with a plurality of push rods 13, and the, the bottom of the groove 5 is provided with a square groove 7, a baffle plate 8 is connected in the square groove 7 and close to the groove 5, a rotating shaft 9 is connected on the baffle plate 8 and positioned at the left side of the fixed plate 2, a spring 10 is fixedly connected at the bottom of the baffle plate 8 and positioned at the right side of the fixed plate 2, a discharging groove 11 is formed at the right side of the square groove 7 and positioned below the baffle plate 8, a round groove 12 is formed at the top of the square groove 7 and positioned right above the spring 10, a push rod 13 is connected in the round groove 12, the baffle plate 8 and the square groove 7 are connected in a sliding mode, the baffle plate 8 and the round groove 12 are connected in a rotating mode, limit blocks 14 are fixedly connected at two sides of the push rod 13 and positioned in the square groove 7, a circular plate 15 is fixedly connected at the top end of the push rod 13 and positioned above the base 1, a protective cover 16 is fixedly connected at the front of the partition plate 6 in the demonstration groove 3, the, the rotating shaft 9 and the square groove 7, the blocking rod 4 and the protective cover 16, and the partition plate 6 and the protective cover 16 are all fixedly connected, a storage box 17 is arranged at the top of the base 1 and on the left side of the fixed plate 2, and a box cover 18 is arranged on the storage box 17.

The utility model discloses work flow: when the demonstration device is used, the box cover 18 is taken down from the storage box 17, the storage box 17 is placed below the discharging groove 11, the small balls are put into the demonstration groove 3 from the top, and in the process of descending the small balls downwards, the small balls roll downwards leftwards or rightwards after encountering the stop lever 4 with the probability of 1/2, and then encounter the stop lever 4 of the next layer, and continue to run downwards until the small balls roll between the partition plates 6 below, the distribution of the small balls stacked between the partition plates 6 is close to normal distribution, after the demonstration is completed, an operator presses the circular plate 15, the circular plate 15 pushes the baffle plate 8 to rotate downwards around the rotating shaft 9 through the push rod 13, the baffle plate 8 rotating downwards does not block the groove 5 any more, the small balls in the groove 5 fall downwards onto the baffle plate 8, slide rightwards along the inclined baffle plate 8, finally fall into the storage box 17 through the discharging groove 11, after all the small balls fall into the storage box 17, the pressing plate 15 is loosened, the spring 10 pushes, the baffle plate 8 pushes the push rod 13 to move upwards, the baffle plate 8 returns to the original position, the box cover 18 is covered, and the storage box 17 is placed on the base 1.

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

1. A probability theory mathematics presentation device, includes base (1), its characterized in that: the demonstration device is characterized in that a fixed plate (2) is fixedly connected to the top of the base (1) and located at the center of the base (1), a demonstration groove (3) is formed in the front of the fixed plate (2), a stop lever (4) is fixedly connected to the inside of the demonstration groove (3), a groove (5) is correspondingly formed in the bottom of the base (1) and in the position of the demonstration groove (3), a partition plate (6) is fixedly connected to the inside of the demonstration groove (3) and below the stop lever (4), a square groove (7) is formed in the bottom of the groove (5), a baffle (8) is connected to the inside of the square groove (7) and in the position close to the groove (5), a rotating shaft (9) is connected to the baffle (8) and located on the left side of the fixed plate (2), a spring (10) is fixedly connected to the bottom of the baffle (8) and located on the right side of the fixed plate (2), a discharge groove (11) is formed in, the top of square groove (7) just is located spring (10) and has seted up circular slot (12) directly over, circular slot (12) in-connection has push rod (13), the both sides of push rod (13) just are located fixedly connected with stopper (14) in square groove (7), the top of push rod (13) just is located top fixedly connected with plectane (15) of base (1), just be located positive fixedly connected with protection casing (16) of baffle (6) in demonstration groove (3), the top of base (1) just is located the left side of fixed plate (2) and is provided with storage case (17), be provided with lid (18) on storage case (17).

2. A probability theory mathematics presentation device as claimed in claim 1, wherein: the base (1) and the fixed plate (2) are made of aluminum alloy, and the storage box (17) is made of bonded neodymium iron boron materials.

3. A probability theory mathematics presentation device as claimed in claim 1, wherein: the gear rods (4) are provided with a plurality of gear rods, and the distance between every two adjacent gear rods (4) is matched with the diameter of the small ball for demonstration.

4. A probability theory mathematics presentation device as claimed in claim 1, wherein: the partition plate (6) is provided with a plurality of push rods (13), and the length of each push rod is matched with the distance from the bottom of the square groove (7) to the bottom of the base (1).

5. A probability theory mathematics presentation device as claimed in claim 1, wherein: baffle (8) and square groove (7), push rod (13) and round groove (12) the connected mode be sliding connection and baffle (8) are connected for rotating with the connected mode of pivot (9).

6. A probability theory mathematics presentation device as claimed in claim 1, wherein: the protection casing (16) are made by transparent acrylic glass and spring (10) and square groove (7), pivot (9) and square groove (7), shelves pole (4) and protection casing (16) and baffle (6) are fixed connection with the connected mode of protection casing (16).