Probability statistics device for applied mathematics

Abstract

The utility model discloses a probability statistics device for applied mathematics, which relates to the technical field of education and comprises a device body, a first demonstration mechanism is arranged at one position of the upper end of the device body, and a second demonstration mechanism is arranged at the other position of the upper end of the device body. Through cooperation of the second demonstration mechanism, the statistics tank, the feeding port, the cover, the lifting block, the observation glass, the movable plate, the pull groove, the motor, the stirring shaft, the stirring rod and the demonstration ball, the random probability is demonstrated through the second demonstration mechanism, the stirring shaft is driven to rotate through the motor, the stirring rod is driven to rotate to stir the demonstration ball, and the demonstration effect is improved. A user takes random demonstration balls for many times to count the probability of taking different demonstration balls, the demonstration balls can be prevented from flying out of the statistical tank during stirring through the arrangement of a cover, other personnel can conveniently observe the internal condition of the statistical tank through the arrangement of observation glass, and the observation glass can be shielded through the arrangement of a movable plate.

Description

Technical Field

[0001] The utility model relates to the technical field of education, in particular to a probability statistics device of applied mathematics. Background Art

[0002] Probability, also known as likelihood, reflects the likelihood of a random event occurring, that is, an event that may or may not occur under the same conditions. Probability statistics is an important research topic in advanced applied mathematics. For example, through probability statistics, the proportion of random inspections of goods can be calculated, thereby deriving a more accurate yield rate.

[0003] Patent publication number CN210627604U discloses a probability and statistics device for applied mathematics, including a rotating barrel, three support legs fixedly installed on the bottom of the rotating barrel, a connecting plate connected between the support legs, a storage box provided at the upper end of the connecting plate, and a rotating shaft provided at the inner center position of the rotating barrel.

[0004] In order to solve the problem that the existing device is entirely operated by manpower and has low efficiency, the existing technology adopts a method of setting up a rotating barrel through mechanical transmission. However, the demonstration effect of the statistical device is relatively simple, which leads to a simple teaching effect and affects students' learning efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a probability statistics device based on applied mathematics to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A probability statistics device for applied mathematics comprises a device body, wherein a first demonstration mechanism is provided at one location on the upper end of the device body, and a second demonstration mechanism is provided at another location on the upper end of the device body.

[0008] The second demonstration mechanism includes a statistical tank, the bottom end of which is fixedly connected to the device body, the top end of which is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a stirring shaft, the bottom end of the stirring shaft is fixedly connected to a stirring rod, and a demonstration ball is movably connected inside the statistical tank.

[0009] A further improvement of the technical solution of the present invention is that: the top of the statistical tank is fixedly connected with a feeding port, the top of the feeding port is movably connected with a cover, and the top of the cover is fixedly connected with a lifting block.

[0010] A further improvement of the technical solution of the present utility model is that: an observation glass is fixedly connected to the surface of the statistical tank, a movable plate is movably connected to another part of the surface of the statistical tank, and a groove is provided on the surface of the movable plate.

[0011] A further improvement of the technical solution of the present utility model is that: the device body includes a counterweight block, the bottom end of the device body is fixedly connected to a support leg, a storage cavity is provided on the surface of the device body, and a plug-in column is provided inside the storage cavity. The plug-in column is fixedly connected to the device body, and the counterweight block is plugged into the plug-in column.

[0012] A further improvement of the technical solution of the present utility model is that: the first demonstration mechanism includes a mounting seat, a connecting tube, and a demonstration vehicle; the bottom end of the mounting seat is fixedly connected to the device main body; a slide is provided on the surface of the mounting seat; a buffer pad is fixedly connected to one end of the mounting seat; the demonstration vehicle is movably connected to the mounting seat; and the outer diameter of the demonstration vehicle matches the inner diameter of the slide.

[0013] A further improvement of the technical solution of the present utility model is that: the bottom end of the demonstration vehicle is fixedly connected to a moving wheel, the top end of the demonstration vehicle is fixedly connected to a plug column, the upper end of the mounting seat is fixedly connected to a connecting frame, and the bottom end top rod of the connecting frame is connected to a flexible rod.

[0014] A further improvement of the technical solution of the present utility model is that: the connecting tube includes a spring, the connecting tube is fixedly connected to the mounting seat, a slide groove is provided at one place on the surface of the connecting tube, a scale is provided at another place on the surface of the connecting tube, a pull rod is movably connected inside the connecting tube, the top end of the pull rod is fixedly connected to a top block, the bottom end of the top block is fixedly connected to a slider, the bottom end of the pull rod is fixedly connected to a hand-held ball, the spring is provided inside the connecting tube and wraps the pull rod, the top end of the spring is fixedly connected to the top block, and the bottom end of the spring is fixedly connected to the connecting tube.

[0015] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0016] 1. The utility model provides a probability statistics device for applied mathematics, which adopts a second demonstration mechanism, a statistical tank, a feeding port, a lid, a lifting block, an observation glass, a movable plate, a trough, a motor, a stirring shaft, a stirring rod, and a demonstration ball. The random probability is demonstrated by the second demonstration mechanism, and the stirring shaft is driven by the motor to rotate, which drives the stirring rod to rotate to stir the demonstration ball. The user picks up random demonstration balls multiple times to calculate the probability of picking up different demonstration balls. The setting of the lid can prevent the demonstration ball from flying out of the statistical tank during stirring. The setting of the observation glass facilitates other personnel to observe the internal condition of the statistical tank, and the setting of the movable plate can cover the observation glass.

[0017] 2. The utility model provides a probability statistics device of applied mathematics, which adopts the cooperation of the device body, supporting legs, storage cavity, first plug-in column and counterweight block. The counterweight block is stored in the storage cavity, and the weight of the demonstration vehicle is increased by the counterweight block to enhance the demonstration effect. The installation of the counterweight block is convenient through the setting of the plug-in column.

[0018] 3. The utility model provides a probability statistics device for applied mathematics, which adopts the cooperation of a first demonstration mechanism, a mounting seat, a slide, a buffer pad, a demonstration vehicle, a moving wheel, a connecting tube, a slide groove, a scale, a pull rod, a top block, a slider, a hand-held ball, a connecting frame, a flexible rod, and a spring. The top block is pulled and released by the hand-held ball, and the top block is pushed forward by the reaction force of the spring to observe the forward distance of the demonstration vehicle and whether the demonstration vehicle can pass through the obstacle blocked by the flexible rod. The provision of the buffer pad can reduce the impact force of the demonstration vehicle hitting the edge of the mounting seat to prevent damage to the demonstration vehicle. The provision of the slider and the scale can observe the force with which the top block is pushed out by the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the first demonstration mechanism structure of the present utility model;

[0021] Figure 3 This is a schematic diagram of the second demonstration mechanism structure of the present utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the statistical tank of the present utility model;

[0023] Figure 5 This is a schematic diagram of the connecting tube structure of the present utility model.

[0024] In the figure: 1. Device body; 11. Support leg; 12. Storage chamber; 13. Insert column; 14. Counterweight; 2. First demonstration mechanism; 21. Mounting seat; 22. Slide; 23. Buffer pad; 24. Demonstration vehicle; 25. Moving wheel; 26. Connecting cylinder; 27. Slide groove; 28. Scale; 29. ​​Pull rod; 210. Top block; 211. Slider; 212. Hand-held ball; 213. Connecting frame; 214. Flexible rod; 215. Spring; 3. Second demonstration mechanism; 31. Statistical tank; 32. Feed port; 33. Cover; 34. Lifting block; 35. Observation glass; 36. Movable plate; 37. Pull groove; 38. Motor; 39. Agitator shaft; 310. Agitator rod; 311. Demonstration ball. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the embodiments:

[0026] Example 1

[0027] like Figure 1-5 As shown, the utility model provides a probability statistics device for applied mathematics, including a device body 1, a first demonstration mechanism 2 is provided at one end of the upper end of the device body 1, a second demonstration mechanism 3 is provided at another end of the upper end of the device body 1, the second demonstration mechanism 3 includes a statistical tank 31, the bottom end of the statistical tank 31 is fixedly connected to the device body 1, the top of the statistical tank 31 is fixedly connected to a motor 38, the output shaft of the motor 38 is fixedly connected to a stirring shaft 39, the bottom end of the stirring shaft 39 is fixedly connected to a stirring rod 310, the interior of the statistical tank 31 is movably connected to a demonstration ball 311, the top of the statistical tank 31 is fixedly connected to a feeding port 32, the top of the feeding port 32 is movably connected to a lid 33, the top of the lid 33 is fixedly connected to a lifting block 34, the surface of the statistical tank 31 is fixedly connected to an observation glass 35, the surface of the statistical tank 31 is movably connected to a movable plate 36 at another point, and the surface of the movable plate 36 is provided with a groove 37.

[0028] In this embodiment, the random probability is demonstrated by the second demonstration mechanism 3. The motor 38 drives the stirring shaft 39 to rotate, which drives the stirring rod 310 to rotate to stir the demonstration ball 311. The user takes the random demonstration ball 311 multiple times to calculate the probability of taking different demonstration balls 311. The setting of the lid 33 can prevent the demonstration ball 311 from flying out of the statistical tank 31 during stirring. The setting of the observation glass 35 makes it convenient for other people to observe the internal conditions of the statistical tank 31. The setting of the movable plate 36 can block the observation glass 35.

[0029] Example 2

[0030] like Figure 1-5 As shown, based on Example 1, the utility model provides a technical solution: preferably, the device body 1 includes a counterweight block 14, the bottom end of the device body 1 is fixedly connected to the support leg 11, the surface of the device body 1 is provided with a storage cavity 12, and the interior of the storage cavity 12 is provided with a plug column 13, the plug column 13 is fixedly connected to the device body 1, and the counterweight block 14 is plugged into the plug column 13.

[0031] In this embodiment, the storage cavity 12 accommodates and stores the counterweight 14 , and the counterweight 14 is used to increase the weight of the demonstration vehicle 24 to enhance the demonstration effect. The arrangement of the insertion column 13 facilitates the installation of the counterweight 14 .

[0032] Example 3

[0033] like Figure 1-5As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the first demonstration mechanism 2 includes a mounting seat 21, a connecting tube 26, and a demonstration vehicle 24. The bottom end of the mounting seat 21 is fixedly connected to the device body 1, and a slide 22 is provided on the surface of the mounting seat 21. One end of the mounting seat 21 is fixedly connected to a buffer pad 23. The demonstration vehicle 24 is movably connected to the mounting seat 21. The outer diameter of the demonstration vehicle 24 and the inner diameter of the slide 22 match each other. The bottom end of the demonstration vehicle 24 is fixedly connected to a moving wheel 25, the top end of the demonstration vehicle 24 is fixedly connected to a plug column 13, and the upper end of the mounting seat 21 is fixedly connected to a connecting frame 213. The connecting frame 213 The bottom end of the top rod is connected to a flexible rod 214, the connecting tube 26 includes a spring 215, the connecting tube 26 is fixedly connected to the mounting seat 21, a slide groove 27 is provided at one place on the surface of the connecting tube 26, and a scale 28 is provided at another place on the surface of the connecting tube 26. The inside of the connecting tube 26 is movably connected with a pull rod 29, the top of the pull rod 29 is fixedly connected to a top block 210, the bottom end of the top block 210 is fixedly connected to a slider 211, and the bottom end of the pull rod 29 is fixedly connected to a hand-held ball 212. The spring 215 is provided inside the connecting tube 26 and wraps the pull rod 29. The top of the spring 215 is fixedly connected to the top block 210, and the bottom end of the spring 215 is fixedly connected to the connecting tube 26.

[0034] In this embodiment, conditional probability, that is, the probability of an event occurring under different conditions, is demonstrated by the first demonstration mechanism 2 (that is, whether the demonstration vehicle 24 can pass through the obstruction of the flexible rod 214 when pushed by different forces). By holding the ball 212 and pulling the top block 210 and releasing it, the top block 210 is pushed forward by the reaction force of the spring 215 to observe the forward distance of the demonstration vehicle 24 and whether the demonstration vehicle 24 can pass through the obstruction of the flexible rod 214 as an obstacle. The provision of the buffer pad 23 can reduce the impact force of the demonstration vehicle 24 hitting the edge of the mounting seat 21, thereby preventing the demonstration vehicle 24 from being damaged. The provision of the slider 211 and the scale 28 can observe the force with which the top block 210 is pushed out by the spring 215.

[0035] The following is a detailed description of the working principle of the probability and statistics device of applied mathematics.

[0036] like Figure 1-5As shown, when the statistical device is in use, the conditional probability, that is, the probability of an event occurring under different conditions, is demonstrated through the first demonstration mechanism 2 (that is, whether the demonstration vehicle 24 can pass through the obstruction of the flexible rod 214 under different forces of propulsion). By holding the ball 212 and pulling the top block 210 and releasing it, the top block 210 is pushed forward by the reaction force of the spring 215 to observe the forward distance of the demonstration vehicle 24 and whether the demonstration vehicle 24 can pass through the obstruction of the flexible rod 214. The setting of the buffer pad 23 can reduce the impact force of the demonstration vehicle 24 hitting the edge of the mounting seat 21, thereby preventing the demonstration vehicle 24 from being damaged. The setting of the slider 211 and the scale 28 can be used to observe the force with which the top block 210 is pushed out by the spring 215, and the random probability is demonstrated through the second demonstration mechanism 3. The motor 38 drives the stirring shaft 39 to rotate, driving the stirring rod 310 to rotate to stir the demonstration ball 311. The user picks up random demonstration balls 311 multiple times to calculate the probability of picking up different demonstration balls 311. The setting of the lid 33 can prevent the demonstration ball 311 from flying out of the statistical jar 31 during stirring. The setting of the observation glass 35 makes it convenient for other personnel to observe the internal condition of the statistical jar 31, and the setting of the movable plate 36 can block the observation glass 35.

[0037] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A probability and statistics device for applied mathematics, comprising a device body (1), characterized in that: A first demonstration mechanism (2) is provided at one location on the upper end of the device body (1), and a second demonstration mechanism (3) is provided at another location on the upper end of the device body (1); The second demonstration mechanism (3) comprises a statistical tank (31), the bottom end of the statistical tank (31) is fixedly connected to the device body (1), the top end of the statistical tank (31) is fixedly connected to a motor (38), the output shaft of the motor (38) is fixedly connected to a stirring shaft (39), the bottom end of the stirring shaft (39) is fixedly connected to a stirring rod (310), and the interior of the statistical tank (31) is movably connected to a demonstration ball (311).

2. A probability and statistics device for applied mathematics according to claim 1, characterized in that: The top of the statistical tank (31) is fixedly connected to a feed port (32), the top of the feed port (32) is movably connected to a cover (33), and the top of the cover (33) is fixedly connected to a lifting block (34).

3. A probability and statistics device for applied mathematics according to claim 1, characterized in that: An observation glass (35) is fixedly connected to the surface of the statistical tank (31), and a movable plate (36) is movably connected to another part of the surface of the statistical tank (31), and a groove (37) is provided on the surface of the movable plate (36).

4. The probability and statistics device for applied mathematics according to claim 1, characterized in that: The device body (1) includes a counterweight (14), the bottom end of the device body (1) is fixedly connected to a support leg (11), a storage cavity (12) is provided on the surface of the device body (1), an insertion column (13) is provided inside the storage cavity (12), the insertion column (13) is fixedly connected to the device body (1), and the counterweight (14) is plugged into the insertion column (13).

5. The probability and statistics device for applied mathematics according to claim 1, characterized in that: The first demonstration mechanism (2) comprises a mounting seat (21), a connecting tube (26), and a demonstration vehicle (24); the bottom end of the mounting seat (21) is fixedly connected to the device body (1); a slideway (22) is provided on the surface of the mounting seat (21); one end of the mounting seat (21) is fixedly connected to a buffer pad (23); the demonstration vehicle (24) is movably connected to the mounting seat (21); and the outer diameter of the demonstration vehicle (24) matches the inner diameter of the slideway (22).

6. A probability and statistics device for applied mathematics according to claim 5, characterized in that: The bottom end of the demonstration vehicle (24) is fixedly connected to a moving wheel (25), the top end of the demonstration vehicle (24) is fixedly connected to a plug post (13), the upper end of the mounting seat (21) is fixedly connected to a connecting frame (213), and the bottom end top rod of the connecting frame (213) is connected to a flexible rod (214).

7. A probability and statistics device for applied mathematics according to claim 5, characterized in that: The connecting tube (26) includes a spring (215), the connecting tube (26) is fixedly connected to the mounting seat (21), a slide groove (27) is provided at one place on the surface of the connecting tube (26), a scale (28) is provided at another place on the surface of the connecting tube (26), the interior of the connecting tube (26) is movably connected to a pull rod (29), the top end of the pull rod (29) is fixedly connected to a top block (210), the bottom end of the top block (210) is fixedly connected to a slider (211), the bottom end of the pull rod (29) is fixedly connected to a hand-held ball (212), the spring (215) is provided inside the connecting tube (26) and wraps the pull rod (29), the top end of the spring (215) is fixedly connected to the top block (210), and the bottom end of the spring (215) is fixedly connected to the connecting tube (26).

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