CN210691753U

CN210691753U - Mathematics teaching probability presentation device

Info

Publication number: CN210691753U
Application number: CN201921773834.0U
Authority: CN
Inventors: 左世凯; 楚斌
Original assignee: Henan Vocational College of Applied Technology
Current assignee: Henan Vocational College of Applied Technology
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-06-05
Anticipated expiration: 2029-10-21

Abstract

A mathematical teaching probability demonstration device effectively solves the problem that the existing mathematical probability teaching demonstration tool is inconvenient to use; the rotary shaft is characterized by comprising a horizontally placed fixed plate, wherein a vertical axial rotary groove with an upward opening is formed in the fixed plate, a rotary shaft is coaxially and rotatably connected in the rotary groove, a plurality of separation grooves which are uniformly distributed along the circumferential direction of the rotary shaft and are in the vertical direction are formed in the outer edge surface of the rotary shaft, a separation plate is detachably connected in each separation groove, the lower end surface of each separation plate is in contact with the bottom surface of the rotary groove, and the rotary groove is divided into a plurality of accommodating cavities by the plurality of separation plates; can once use a plurality of bobbles to demonstrate, further deepen student's understanding, the apron of transparent material is convenient for observe the demonstration result, and statistics is convenient, has alleviateed mr's teaching burden, and this simple structure, convenient operation conceives the novelty, and the practicality is strong.

Description

Mathematics teaching probability presentation device

Technical Field

The utility model relates to a teaching aid apparatus technical field, concretely relates to mathematics teaching probability presentation device.

Background

Mathematics is always a very important subject, and in probability teaching, a teacher can demonstrate through some teaching props to improve the understanding of students to probability.

However, general probability demonstration only depends on a teacher to throw dice, randomly draw black balls and white balls in a classroom, and the like, because the classroom time is limited, the teacher needs a long time to verify the consistency of the result and the theory if performing perfect actual demonstration, and statistics is difficult to perform, and the process is complicated and inconvenient to use.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned condition, for overcoming prior art's defect, the utility model aims at providing a mathematics teaching probability presentation device, the effectual current problem of mathematics probability teaching presentation aid awkward of having solved.

The technical scheme of its solution is, the utility model discloses a fixed plate that the level was placed, the ascending rotation groove of axial and opening about having seted up on the fixed plate, the coaxial rotation in the rotation inslot is connected with the pivot, sets up a plurality of separation grooves along its circumferencial direction equipartition and upper and lower direction on the pivot outer fringe face, and every is divided the inslot and all dismantles and is connected with the division board, and terminal surface all with the bottom surface contact of rotation groove under every division board, a plurality of division boards will rotate the groove and separate for a plurality of chambeies that hold.

Compared with the prior art, the beneficial effects of the utility model are that: set up the division board and can dismantle, will rotate the groove and separate for the chamber that holds of different proportions, be convenient for to the demonstration of different probabilities, the motor drives a plurality of division boards through the pivot and rotates at the uniform velocity, improves the accuracy of probability demonstration, can once use a plurality of bobbles to demonstrate, further deepens student's understanding, and the demonstration result is convenient for observe by the apron of transparent material, and the statistics is convenient, has alleviateed mr's teaching burden, this simple structure, convenient operation conceives the novelty, and the practicality is strong.

Drawings

Fig. 1 is an isometric view of the present invention.

Figure 2 is the utility model discloses a dissect right side and look the axonometric drawing.

Fig. 3 is the utility model discloses a dissect axonometric view.

Fig. 4 is an enlarged view of a in fig. 2 according to the present invention.

Fig. 5 is an enlarged view of B in fig. 3 according to the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

By figure 1 to 5 and give, including the fixed plate 1 that the level was placed, axial and the ascending rotation groove 2 of opening about having seted up on the fixed plate 1, it is connected with pivot 3 to rotate the coaxial rotation in the groove 2, set up a plurality of along its circumferencial direction equipartition and the separating groove 4 of direction from top to bottom on the 3 outer fringe faces of pivot, all dismantle in every separating groove 4 and be connected with division board 5, every division board 5 lower extreme face all with the contact of 2 bottom surfaces in rotation groove, a plurality of division boards 5 will rotate groove 2 and separate for a plurality of chambeies that hold.

In order to enable the rotating shaft 3 to rotate, the lower end of the fixing plate 1 is provided with a fixing box 6 with an upward opening, a motor 7 coaxial with the rotating shaft 3 is arranged in the fixing box 6, and the lower end of the rotating shaft 3 penetrates through the fixing plate 1 and is fixedly connected with the output end of the motor 7.

In order to prevent the small balls in the accommodating cavity from flying outwards, a cover plate 8 positioned on the upper side of the rotating groove 2 is coaxially and threadedly connected in the rotating groove, and the lower surface of the cover plate 8 can be in contact with the upper end surface of the rotating shaft 3.

In order to make the small ball enter the containing cavity, the cover plate 8 is provided with a ball inlet hole 9 which is positioned at the rear side and is communicated up and down, and the ball inlet hole 9 is communicated with the rotating groove 2.

In order to facilitate the small balls to enter the ball inlet hole 9, the upper end of the ball inlet hole 9 is coaxially provided with a ball inlet pipe 10, and the upper end of the ball inlet pipe 10 is provided with a funnel 11.

In order to increase the stability of the device, the lower surface of the fixed box 6 is provided with a suction cup 12 with a downward opening.

The utility model discloses when using, take out this device, anticlockwise rotation inlet tube 10, inlet tube 10 drives 8 anticlockwise rotations of apron, will lap 8 and pull down in rotating groove 2, insert corresponding side partition groove 4 with division board 5 respectively as required, will rotate groove 2 partition, if: the rotating groove 2 needs to be divided into four equal parts, and the four partition plates 5 are respectively inserted into the corresponding partition grooves 4, so that the rotating groove 2 is divided into four containing cavities equally;

placing the cover plate 8 into the rotating groove 2, rotating the ball inlet pipe 10 clockwise, driving the cover plate 8 to rotate clockwise by the ball inlet pipe 10, stopping rotating the ball inlet pipe 10 when the lower surface of the cover plate 8 is contacted with the upper end surface of the partition plate 5, and fixing the cover plate 8 in the rotating groove 2;

starting a motor 7, rotating the motor 7 clockwise, driving a rotating shaft 3 to rotate clockwise by the motor 7, driving a plurality of partition plates 5 to rotate clockwise by the rotating shaft 3, sequentially communicating a plurality of accommodating cavities with ball inlet holes 9, sequentially placing a plurality of small balls into a funnel 11 when the rotating speed of the rotating plate is stable, and respectively entering different accommodating cavities through ball inlet pipes 10 and the ball inlet holes 9;

when all the small balls enter the containing cavities, the motor 7 is turned off, and the probability can be calculated according to the number of the containing cavities and the number of the small balls in each containing cavity;

and after observation is finished, the ball inlet pipe 10 is rotated clockwise, the cover plate 8 is taken out from the rotating groove 2, the small ball is taken out from the containing cavity, the partition plate 5 is replaced as required, and the operation is repeated to perform new probability demonstration.

The utility model discloses well apron 8 and inlet tube 10 adopt transparent material to make, are convenient for observe the experimental result.

Claims

1. The utility model provides a mathematics teaching probability presentation device, including fixed plate (1) that the level was placed, a serial communication port, axial and the ascending rotation groove of opening (2) about having seted up on fixed plate (1), it is connected with pivot (3) to rotate coaxial rotation in groove (2), set up a plurality of partition groove (4) along its circumferencial direction equipartition and upper and lower direction on pivot (3) the outer fringe face, it is connected with division board (5) all to dismantle in every partition groove (4), terminal surface all contacts with rotation groove (2) bottom surface under every division board (5), a plurality of division boards (5) will rotate groove (2) and separate for a plurality of chambeies that hold.

2. The probability demonstration device for mathematics teaching as claimed in claim 1, wherein the lower end of the fixed plate (1) is provided with a fixed box (6) with an upward opening, a motor (7) coaxial with the rotating shaft (3) is arranged in the fixed box (6), and the lower end of the rotating shaft (3) penetrates through the fixed plate (1) and is fixedly connected with the output end of the motor (7).

3. The probability demonstrator for mathematical education as claimed in claim 1, wherein said rotation slot (2) is coaxially screwed with a cover plate (8) on its upper side, and the lower surface of the cover plate (8) can contact with the upper end surface of the rotation shaft (3).

4. The probability demonstration device for mathematics teaching as claimed in claim 3, wherein said cover plate (8) is equipped with a ball inlet hole (9) which is located at the rear side and is through up and down, and the ball inlet hole (9) is communicated with the rotation groove (2).

5. The mathematics teaching probability demonstration device according to claim 4, characterized in that the upper end of the ball inlet hole (9) is coaxially provided with a ball inlet pipe (10), and the upper end of the ball inlet pipe (10) is provided with a funnel (11).

6. The mathematics teaching probability demonstration device according to claim 2, characterized in that the lower surface of the fixed box (6) is provided with a suction cup (12) with a downward opening.