CN210627606U

CN210627606U - Higher mathematics probability teaching aid

Info

Publication number: CN210627606U
Application number: CN201921699355.9U
Authority: CN
Inventors: 梁靓
Original assignee: Zibo Vocational Institute
Current assignee: Zibo Vocational Institute
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-05-26
Anticipated expiration: 2029-10-09

Abstract

The utility model discloses a higher mathematics probability teaching aid, wherein, a rotary cavity is arranged in a shell, ejection cavities are arranged at two sides of the rotary cavity, and a display cavity is arranged between the ejection cavities and the side wall of the shell; the dice fall into the ejection cavity after being rotated, and are ejected to the display cavity to observe the number of the display points. The utility model discloses can realize launching the dice random placement, use manpower sparingly, the variable that every dice bounced is even, makes the dice fall into the probability of show chamber back each point up and tends to the same, the meaning to student's demonstration probability that can be better.

Description

Higher mathematics probability teaching aid

Technical Field

The utility model relates to an advanced mathematics probability teaching aid belongs to mathematics teaching aid field.

Background

In higher mathematics, probability is a difficult knowledge point to understand. The teacher who gives lessons generally demonstrates through the mode of throwing coin or dice, when throwing the dice, it is equal to count the probability that the six points of dice are up, need statistics person hand dice and throw to the air, then wait that the dice falls on the ground, repeat above-mentioned action many times. In this way, it takes much time for the statistic person, and it is time-consuming and labor-consuming.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose provides an advanced mathematics probability teaching aid in order to solve the shortcoming that prior art exists.

In order to solve the problems, the utility model provides a higher mathematics probability teaching aid, wherein, a rotating cavity is arranged in a shell, ejection cavities are arranged at two sides of the rotating cavity, and a display cavity is arranged between the ejection cavities and the side wall of the shell;

a motor is arranged at the bottom in the rotating cavity, a support is connected to a rotating shaft of the motor, a tray is arranged on the support, a funnel is arranged above the tray, and the gap between the bottom of the funnel and the tray is larger than the diameter of the dice;

two sides of the funnel are respectively fixed at the upper end of the partition plate between the ejection cavity and the rotating cavity; a channel is arranged on a partition plate between the rotating cavity and the ejection cavity, the bottom of the channel is horizontal to the upper plane of the tray and can accommodate dice to pass through, and an ejection device is arranged at the bottom of the ejection cavity;

an inclined plane is arranged above the ejection cavity, the lower end of the inclined plane is positioned on the partition plate, and the higher end of the inclined plane is positioned at the top of the display cavity.

The ejection device comprises an ejection plate, a spring is arranged between the ejection plate and the bottom of the ejection cavity, one end of the ejection rope is connected to the bottom of the ejection plate, and the other end of the ejection rope penetrates through the spring and is led out of the shell from a through hole in the bottom of the ejection cavity.

The tray is provided with uniformly arranged bulges, and the dice, after being rotated by centrifugal force, roll over and fall into the ejection cavity after touching the bulges.

The side walls of the display cavity and the ejection cavity are made of transparent materials, so that the number of the dice can be observed conveniently.

Dice is thrown away from the funnel, falls on the tray center, and the tray is rotatory under the drive of motor, and dice receives centrifugal force to launching the chamber direction upset, falls into behind the passageway and launches the chamber, is bounced by ejection device, and the show chamber is fallen into in the roll-over after contacting the inclined plane, and the user is counted through the transparent lateral wall in show chamber observation dice.

The utility model discloses beneficial effect:

the utility model discloses can realize that the dice falls at random in launching the chamber, use manpower sparingly, conveniently observe, when needs further experiment, can be through launching rope compression spring, by student oneself bounce every dice, increase experiment enjoyment, rotatory chamber and launch the setting up of chamber and make the number of dice change more random, make the dice fall into the probability of each point up behind the show chamber and tend to the same, the meaning to student demonstration probability that can be better.

Drawings

Fig. 1 is a schematic structural view of the present invention;

wherein: 1. a housing; 2. a motor; 3. a rotating shaft; 4. a support; 5. a tray; 6. a protrusion; 7. a funnel; 8. a partition plate; 9. a bevel; 10. ejecting a rope; 11. a channel; 12. a baffle plate; 13. ejecting a plate; 14. a spring.

Detailed Description

Example 1:

referring to the attached drawings of the specification, the utility model provides a higher mathematics probability teaching aid, wherein, a rotary cavity is arranged in a shell 1, ejection cavities are arranged at two sides of the rotary cavity, and a display cavity is arranged between the ejection cavity and the side wall of the shell 1;

a motor 2 is arranged at the bottom in the rotating cavity, a support 4 is connected to a rotating shaft 3 of the motor 2, a tray 5 is arranged on the support 4, a funnel 7 is arranged above the tray 5, and a gap between the bottom of the funnel 7 and the tray 5 is larger than the diameter of the dice;

two sides of the funnel 7 are respectively fixed at the upper end of the partition plate 8 between the ejection cavity and the rotating cavity; a channel 11 is arranged on a partition plate 8 between the rotating cavity and the ejection cavity, the bottom of the channel 11 is horizontal to the upper plane of the tray 5 and can accommodate dice to pass through, and an ejection device is arranged at the bottom of the ejection cavity;

an inclined plane 9 is arranged above the ejection cavity, the lower end of the inclined plane 9 is positioned on the partition plate 8, and the higher end of the inclined plane 9 is positioned at the top of the display cavity.

The ejection device comprises an ejection plate 13, a spring 14 is arranged between the ejection plate 13 and the bottom of the ejection cavity, one end of an ejection rope 10 is connected to the bottom of the ejection plate 13, and the other end of the ejection rope penetrates through the spring and is led out of the shell from a through hole in the bottom of the ejection cavity.

The tray 5 is provided with evenly arranged bulges 6.

The side walls of the display cavity and the ejection cavity are made of transparent materials. The display chamber and the ejection chamber are separated by a baffle 12.

During the use, open the top cap, throw into funnel 7 with a plurality of dices, motor 2 rotates and drives tray 5 rotation, and the dice falls into tray 5, receives centrifugal force to tray 5 epitaxial motion, touches behind arch 6, and the dice upset falls into through passageway 11 and launches the chamber bottom and launch on board 13, and the observer can observe the dice drop point through the transparent chamber of launching.

When further experiments are needed, or when experimental pleasure needs to be added to students, the ejection ropes 10 can be used for pulling the springs 14 and then loosening the ejection plates 13 to quickly rebound, the dice are ejected, the dice touch the inclined planes 9 after being ejected, the dice fall into the display cavity after being overturned, and the number of the dice can be observed by an observer from the glass side walls of the display cavity. After the display chamber is full, the bottom cover can be opened to take the dice out for use again.

The diameter of the ejection cavity is slightly larger than that of the dice, so that the dice cannot fall back to the ejection cavity or only slightly fall back after being ejected.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The higher mathematics probability teaching aid is characterized in that a shell (1) is internally provided with a rotating cavity, two sides of the rotating cavity are provided with ejection cavities, and a display cavity is arranged between the ejection cavities and the side wall of the shell (1);

a motor (2) is arranged at the bottom in the rotating cavity, a support (4) is connected to a rotating shaft (3) of the motor (2), a tray (5) is arranged on the support (4), a funnel (7) is arranged above the tray (5), and a gap between the bottom of the funnel (7) and the tray (5) is larger than the diameter of the dice;

two sides of the funnel (7) are respectively fixed at the upper end of a partition plate (8) between the ejection cavity and the rotating cavity; a channel (11) is arranged on a partition plate (8) between the rotating cavity and the ejection cavity, the bottom of the channel (11) is horizontal to the upper plane of the tray (5) and can accommodate dice to pass through, and an ejection device is arranged at the bottom of the ejection cavity;

an inclined plane (9) is arranged above the ejection cavity, the lower end of the inclined plane (9) is positioned on the partition plate (8), and the higher end of the inclined plane (9) is positioned at the top of the display cavity.

2. The higher mathematics probability teaching aid as claimed in claim 1, characterized in that said ejection means includes an ejection plate (13), a spring (14) is provided between said ejection plate (13) and the bottom of the ejection chamber, one end of the ejection rope (10) is connected to the bottom of the ejection plate (13), and the other end is led out of the casing through a through hole at the bottom of the ejection chamber through the spring.

3. An advanced math probability teaching aid according to claim 1, wherein the tray (5) is provided with evenly arranged protrusions (6).

4. The apparatus for higher mathematics probability teaching of claim 1, wherein the side walls of the display chamber and the ejection chamber are made of transparent materials.