CN219695910U

CN219695910U - Mathematical probability presentation device

Info

Publication number: CN219695910U
Application number: CN202320494537.2U
Authority: CN
Inventors: 胡海棠
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-09-15
Anticipated expiration: 2033-03-15

Abstract

The utility model discloses a mathematical probability demonstration device which comprises a base, wherein a rotary table is arranged on the surface of the base, a pointer is arranged on the surface of the base, a reinforcing rod is fixedly connected to the inner wall of the rotary table, the other end of the reinforcing rod is fixedly connected with a fixed column, a plurality of sector plates are arranged in the rotary table, a top cover is arranged at the top of the rotary table, a motor is arranged in the base, an output shaft of the motor is fixedly connected with the fixed column, a fixed box is arranged on one side of the rotary table, and three vertical rollers are hinged to one side of the fixed box. According to the utility model, the sector plate, the front clamping block and the rear clamping block are arranged, the surface color of the sector plate is changed by extracting the turnover sector plate, so that the size of each color block on the surface of the rotary table is adjusted to adapt to various demonstration scenes, the rotary table is driven to rotate by the motor, the rolling sleeve is driven by the push rod to abut against the rotary table, so that the rotary table is decelerated, the single demonstration time is shortened, and the duration of the motor and the rolling sleeve acting on the rotary table is random, so that the probability demonstration accuracy is improved.

Description

Mathematical probability presentation device

Technical Field

The utility model relates to the technical field of teaching, in particular to a mathematical probability demonstration device.

Background

In the teaching field at ordinary times, various kinds of teaching directions need to be used for demonstration, wherein a probability demonstration device is needed for probability demonstration. At present, a probability presentation device is commonly used, a plurality of fan-shaped areas are distributed on the turntable, pointers are arranged in the middle of the turntable, the pointers and the turntable can rotate relatively, the sizes of the probabilities of statistical presentation can not be changed through rotating the pointers and the positions of the pointers on the turntable, but the sizes of the fan-shaped areas on the turntable can not be adjusted, the probabilities of the areas can not be adjusted, the randomness of the turntable in the rotating process is often greatly influenced by users, and the randomness of presentation result data can not be ensured.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a mathematical probability demonstration device.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model relates to a mathematical probability demonstration device which comprises a base, wherein a rotary table is arranged on the surface of the base, a pointer is arranged on the surface of the base, a reinforcing rod is fixedly connected to the inner wall of the rotary table, the other end of the reinforcing rod is fixedly connected with a fixing column, a plurality of sector plates are arranged inside the rotary table, a top cover is arranged at the top of the rotary table, a motor is arranged inside the base, an output shaft of the motor is fixedly connected with the fixing column, a fixing box is arranged on one side of the rotary table, three vertical rollers are hinged to one side of the fixing box, a sliding groove is formed in the surface of the base, a convex block is arranged on the surface of the sliding groove, and the surface of the convex block is fixedly connected with the fixing box.

As a preferable technical scheme of the utility model, the surface of the base and the bottom end of the rotary table are provided with ball grooves, and a plurality of balls are arranged in the ball grooves.

As a preferable technical scheme of the utility model, sixteen equal-sized sector plates are arranged in the rotary table, and different color coatings are arranged on two sides of the surface of each sector plate.

As a preferable technical scheme of the utility model, a front clamping block is arranged on one side of the sector plate, a rear clamping block is fixedly connected to the other side of the sector plate, the front clamping blocks are all inserted into the fixing columns, the rear clamping blocks are propped against the rotary table, fixing holes are formed in two sides of the surface of the rear clamping block, inserted bars are arranged in the fixing holes, and the top ends of the inserted bars are fixedly connected with the edge of the top cover.

As a preferable technical scheme of the utility model, the surface of the top cover is provided with transparent glass, the center of the transparent glass is provided with a fixing bolt, and the surface of the fixing column is provided with a screw hole.

As a preferable technical scheme of the utility model, the bottom end of the pointer is provided with threads, and the bottom end of the pointer is in threaded connection with the base.

As a preferable technical scheme of the utility model, one side of the fixed box is fixedly connected with a push rod and two telescopic rods, the bottom ends of the telescopic rods are fixedly connected with a base, and springs are arranged inside the telescopic rods.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the sector plate, the front clamping block and the rear clamping block are arranged, the surface color of the sector plate is changed by extracting the turnover sector plate, so that the size of each color block on the surface of the rotary table is adjusted to adapt to various demonstration scenes, the rotary table is driven to rotate by the motor, the rolling sleeve is driven by the push rod to abut against the rotary table, so that the rotary table is decelerated, the single demonstration time is shortened, and the duration of the motor and the rolling sleeve acting on the rotary table is random, so that the probability demonstration accuracy is improved.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a schematic view of the top cover rotary table of the present utility model;

FIG. 4 is a schematic view of the sector plate construction of the present utility model;

FIG. 5 is a front cross-sectional view of the present utility model;

FIG. 6 is a schematic view of the telescopic rod structure of the present utility model;

in the figure: 1. a base; 2. a rotary table; 3. a ball; 4. a reinforcing rod; 5. a sector plate; 6. a front clamping block; 7. a rear clamping block; 8. fixing the column; 9. a motor; 10. a top cover; 11. a rod; 12. a fixing hole; 13. a fixing bolt; 14. a screw hole; 15. a pointer; 16. a rolling sleeve; 17. a fixed box; 18. a telescopic rod; 19. a push rod; 20. a male block; 21. and a sliding groove.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Wherein like reference numerals refer to like elements throughout.

Example 1

As shown in fig. 1-6, the utility model provides a mathematical probability demonstration device, which comprises a base 1, wherein a rotary table 2 is arranged on the surface of the base 1, a pointer 15 is arranged on the surface of the base 1, a reinforcing rod 4 is fixedly connected to the inner wall of the rotary table 2, the other end of the reinforcing rod 4 is fixedly connected with a fixed column 8, a plurality of sector plates 5 are arranged inside the rotary table 2, a top cover 10 is arranged at the top of the rotary table 2, a motor 9 is arranged inside the base 1, an output shaft of the motor 9 is fixedly connected with the fixed column 8, a fixed box 17 is arranged on one side of the rotary table 2, three vertical rollers 16 are hinged to one side of the fixed box 17, a chute 21 is formed on the surface of the base 1, a convex block 20 is arranged on the surface of the chute 21, and the surface of the convex block 20 is fixedly connected with the fixed box 17.

Furthermore, the surface of the base 1 and the bottom end of the rotary table 2 are provided with ball grooves, and a plurality of balls 3 are arranged in the ball grooves; the output shaft of the motor 9 drives the fixed column 8 to rotate, and the rotary table 2 rotates along the direction of the ball groove under the action of the balls 3.

Sixteen equal-sized sector plates 5 are arranged in the rotary table 2, and different color coatings are arranged on two sides of the surface of each sector plate 5; the sector plate 5 with specific color is pulled out of the rotary table 2 and turned over, so that the size of the color block on the surface of the rotary table 2 is changed, and the increase and decrease adjustment is realized to adapt to various probability scenes.

A front clamping block 6 is arranged on one side of the sector plate 5, a rear clamping block 7 is fixedly connected to the other side of the sector plate 5, the front clamping blocks 6 are inserted into the fixing columns 8, the rear clamping blocks 7 are propped against the rotary table 2, fixing holes 12 are formed in two sides of the surface of the rear clamping blocks 7, inserting rods 11 are arranged in the fixing holes 12, and the top ends of the inserting rods 11 are fixedly connected with the edge of the top cover 10; the sector plate 5 is preliminarily fixed by inserting the front clamping block 6 and the rear clamping block 7 into the fixing column 8 and the rotary table 2 respectively, and both ends of the sector plate 5 are fixed in the rotary table 2 under the restriction of the front clamping block 6 and the rear clamping block 7 respectively by inserting the inserting rod 11 into the fixing holes 12 respectively.

The surface of the top cover 10 is provided with transparent glass, the center of the transparent glass is provided with a fixing bolt 13, and the surface of the fixing column 8 is provided with a screw hole 14; the top cover 10 is fixed with the rotary table 2 by adjusting the fixing bolts 13, and the position relation between the pointer 15 and the sector plate 5 can be observed by transparent glass.

The bottom end of the pointer 15 is provided with threads, and the bottom end of the pointer 15 is in threaded connection with the base 1; the pointer 15 is arranged with the top cover 10 in a staggered manner.

One side of the fixed box 17 is fixedly connected with a push rod 19 and two telescopic rods 18, the bottom ends of the telescopic rods 18 are fixedly connected with the base 1, and springs are arranged inside the telescopic rods 18; the fixed box 17 is driven to move to one side of the rotary table 2 by pushing the push rod 19, the spring inside the telescopic rod 18 stretches, and after the push rod 19 is loosened, the spring in an internal extension state of the telescopic rod 18 rebounds, and the fixed box 17 is driven to be far away from the rotary table 2 under the action of the spring.

Specifically, before the demonstration by using the device, the sector plates 5 in the rotary table 2 can be extracted according to the demonstration probability event, the fixing bolts 13 are unscrewed to enable the top cover 10 to be extracted from the rotary table 2, the inserting rods 11 are separated from the rear clamping blocks 7, the sector plates 5 are extracted and turned through the rear clamping blocks 7 to change the positions and the number of the color areas on the surface of the rotary table 2, the turntable probability demonstration device can carry out multi-situation demonstration by turning over to increase or decrease the sector plates 5 with different colors, then the inserting rods 11 are reinserted into the fixing holes 12, two ends of the sector plates 5 are respectively fixed in the rotary table 2 under the limitation of the front clamping blocks 6 and the rear clamping blocks 7, so as to prevent the sector plates 5 from being thrown out of the rotary table 2 in the process of following the rotation of the rotary table 2, and after the top cover 10 is placed on the surface of the rotary table 2, the bottom ends of the pointers 15 are rotationally inserted into the base 1; after the probability model to be demonstrated is regulated, through starting motor 9, motor 9 output shaft drives fixed column 8 rotation, revolving stage 2 rotates along ball groove direction under ball 3 effect, close motor 9 in three to five seconds after revolving stage 2 rotates, make revolving stage 2 continue to rotate under inertia, then drive fixed box 17 to remove to revolving stage 2 one side through pushing push rod 19, telescopic link 18 inside spring stretches, make three roller 16 offset with revolving stage 2 edge and back fixture block 7 one side, reduce speed to revolving stage 2, make revolving stage 2 can stop more soon, loosen push rod 19 after revolving stage 2 obviously slows down, the spring rebound of telescopic link 18 inside extension state drives fixed box 17 and keeps away from revolving stage 2, record the colour that pointer 15 points after the revolving stage stops rotating, then the repeated operation.

In summary, the utility model changes the surface color of the sector plate 5 by arranging the sector plate 5, the front clamping block 6 and the rear clamping block 7, and adjusts the size of each color block on the surface of the rotary table 2 by extracting and turning the sector plate 5, so as to adapt to various demonstration scenes, and drives the rotary table 2 to rotate by arranging the motor 9, and drives the roller sleeve 16 to abut against the rotary table 2 by the push rod 19, so as to reduce the speed of the rotary table 2, shorten the single demonstration time, and ensure that the duration of the motor 9 and the roller sleeve 16 acting on the rotary table 2 is random, so as to improve the probability demonstration accuracy.

Finally, it should be noted that: the above is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that the present utility model is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a mathematical probability presentation device, includes base (1), a serial communication port, base (1) surface is provided with revolving stage (2), base (1) surface is provided with pointer (15), revolving stage (2) inner wall sets up fixedly connected with stiffener (4), stiffener (4) other end fixed connection fixed column (8), revolving stage (2) inside is provided with a plurality of sector plates (5), revolving stage (2) top is provided with top cap (10), base (1) inside is provided with motor (9), motor (9) output shaft fixed connection fixed column (8), revolving stage (2) one side is provided with fixed box (17), fixed box (17) one side is provided with articulates there are three vertical roller sleeve (16), spout (21) have been seted up on base (1) surface, spout (21) surface is provided with convex piece (20), convex piece (20) fixed connection fixed box (17).

2. The mathematical probability demonstration device according to claim 1, wherein the surface of the base (1) and the bottom end of the rotary table (2) are provided with ball grooves, and a plurality of balls (3) are arranged in the ball grooves.

3. A mathematical probability demonstration device according to claim 1, characterized in that sixteen equally large sector plates (5) are arranged in the rotary table (2), and the two sides of the surface of the sector plates (5) are provided with different color coatings.

4. The mathematical probability demonstration device according to claim 1, wherein a front clamping block (6) is arranged on one side of the sector plate (5), a rear clamping block (7) is fixedly connected to the other side of the sector plate (5), the front clamping blocks (6) are all inserted into the fixing columns (8), the rear clamping blocks (7) are abutted against the rotary table (2), fixing holes (12) are formed in two sides of the surface of the rear clamping blocks (7), inserting rods (11) are arranged in the fixing holes (12), and the top ends of the inserting rods (11) are fixedly connected with the edges of the top cover (10).

5. The mathematical probability demonstration device according to claim 1, wherein the surface of the top cover (10) is provided with transparent glass, a fixing bolt (13) is arranged at the center of the transparent glass, and screw holes (14) are formed in the surface of the fixing column (8).

6. A mathematical probability demonstration apparatus according to claim 1, characterized in that the bottom end of the pointer (15) is provided with threads, and the bottom end of the pointer (15) is in threaded connection with the base (1).

7. The mathematical probability demonstration device according to claim 1, wherein a push rod (19) and two telescopic rods (18) are fixedly connected to one side of the fixed box (17), the bottom ends of the telescopic rods (18) are fixedly connected with the base (1), and springs are arranged inside the telescopic rods (18).