Probability demonstration device

Abstract

The utility model provides a probability demonstration device, which relates to the technical field of probability demonstration tools for mathematics teaching and comprises a demonstration box base, a demonstration box body is arranged above the demonstration box base, and a driving motor is mounted on the rear portion of the upper surface of the demonstration box base through screws. According to the teaching appliance for probability demonstration, the demonstration box body can be controlled to automatically and rapidly shake through cooperation of the driving motor and the driving rotating shaft, so that the probability demonstration can be carried out conveniently, and the probability demonstration can be carried out conveniently. The sphere inside the demonstration box body quickly moves, randomly enters the upper end opening of the sphere conveying cylinder and enters the probability demonstration channel through the sphere conveying cylinder for temporary storage, manual shaking of the box body is replaced, and the problems that when a traditional demonstration box body is used, shaking of the box body needs a large amount of physical power, a teacher feels tired, and the teaching efficiency is high are solved. And the emotion and physical strength of the teacher are not kept stable for teaching.

Description

Technical Field

[0001] The utility model relates to the technical field of probability demonstration tools for mathematics teaching, in particular to a probability demonstration device. Background Art

[0002] Probability theory is a branch of mathematics that mainly studies random events, random variables and random processes. Primary school curriculum includes an introductory course on probability. In order to enable students to learn and understand probability more intuitively, teachers often use turntables, colored balls, drawing lots and dice to assist in the teaching of probability. Among them, colored balls and cardboard boxes are the most commonly used teaching props, which can better show the probability of colored balls falling.

[0003] In the existing cardboard box and colored ball demonstration teaching equipment, the teacher puts colored balls of different colors and different numbers into the box, and shakes the box to make the colored balls inside the box fall out randomly, and then observes the probability of colored balls of different colors falling out. When the colored balls fall, the balls are easy to roll to the ground, and the users need to pick them up, which affects the learning atmosphere. In addition, shaking the box requires a lot of physical strength, which makes the teacher feel tired, which is not conducive to keeping the teacher's emotions and physical strength stable for teaching. Utility Model Content

[0004] The disclosed embodiment relates to a probability demonstration device to solve the problem that in the existing cardboard box and colored ball demonstration teaching equipment, the teacher puts colored balls of different colors and different numbers into a box and shakes the box to make the colored balls inside the box fall out randomly, and then observes the probability of the colored balls of different colors falling out; when the colored balls fall, the balls easily roll to the ground, and the users need to pick them up, which affects the learning atmosphere; and shaking the box requires a lot of physical strength, which makes the teacher feel tired, which is not conducive to maintaining the teacher's emotional and physical stability for teaching.

[0005] According to a first aspect of the present disclosure, a probability demonstration device is provided, specifically comprising: a demonstration box base, a demonstration box body is arranged above the demonstration box base, a driving motor is installed on the rear of the upper surface of the demonstration box base by screws, and it is characterized in that the rotating shaft of the driving motor is fixedly connected to the driving shaft by a coupling, and the driving shaft is rotatably connected to the top of the demonstration box base by a bearing, a probability display channel is provided at the bottom of the demonstration box body, a lifting plug plate is provided at the right end of the probability display channel, and the lifting plug plate is slidably connected to the right surface of the demonstration box body, and an "L"-shaped separation storage rack is fixedly connected inside the demonstration box body.

[0006] In at least some embodiments, a multi-guide rod is vertically welded at each of the four top corners of the upper surface of the demonstration box base, a guide rod tension spring is sleeved on the multi-guide rod, and the lower end of the guide rod tension spring is fixedly connected to the upper surface of the demonstration box base.

[0007] In at least some embodiments, an eccentric push pin is installed on the driving shaft by interference fit, the axis of the eccentric push pin is parallel to the axis of the driving shaft and the difference is 15-25mm, and the eccentric push pin is slidably connected to the lower surface of the probability display channel.

[0008] In at least some embodiments, the demonstration box is a transparent plastic box with a rectangular structure, and the lower edges of the front surface and the rear surface of the demonstration box are respectively fixedly connected with an outer guide plate outside the box, and a longitudinal guide hole is longitudinally opened on the outer guide plate outside the box, and the longitudinal guide hole is slidably connected to the multi-guide rod.

[0009] In at least some embodiments, a circular ball outlet is provided on the left bottom side of the demonstration box, a ball conveying cylinder is fixedly connected above the ball outlet, and the ball conveying cylinder is a cylindrical structure. A ball inlet is provided on the right top side of the demonstration box.

[0010] In at least some embodiments, a rotating blocking plate is tightly hinged on the left edge of the ball entrance, the rotating blocking plate covers the ball entrance, and a blocking plate guide rail is fixedly connected to the right surface of the demonstration box, and the cross-section of the blocking plate guide rail is an "L"-shaped structure.

[0011] In at least some embodiments, the probability display channel is made of transparent plastic material, the probability display channel is located below the sphere outlet, a channel outlet is opened at the right end of the probability display channel, a magnetic block with a magnet structure is fixedly connected to the bottom of the channel outlet, and the magnetic block is magnetically connected to the lifting block plate made of iron material.

[0012] The utility model provides a probability demonstration device, which has the following beneficial effects:

[0013] In the probability demonstration teaching device of the utility model, the demonstration box can be controlled to automatically and quickly shake through the cooperation of the driving motor and the driving shaft, so that the balls inside the demonstration box can move quickly and randomly enter the upper opening of the ball conveying tube, and enter the probability display channel through the ball conveying tube for temporary storage, thereby replacing the manual shaking of the box and solving the problem that the traditional demonstration box needs a lot of physical strength to shake the box when in use, which makes the teacher feel tired and is not conducive to maintaining the teacher's emotional and physical stability for teaching.

[0014] In addition, in the present application, the randomly drawn colored balls are stored through the probability display channel, which can prevent the colored balls from falling to the ground and rolling around. There is no need for users to pick them up, thus avoiding interference with the teaching environment. At the same time, the colored balls inside the probability display channel can be taken out and collected through the opening at the right end of the probability display channel.

[0015] In addition, a separate storage rack is provided inside the demonstration box, through which the colored balls that do not participate in the probability demonstration are stored, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0017] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] In the attached picture:

[0019] Figure 1 A schematic diagram showing the overall structure of the present application;

[0020] Figure 2 A schematic diagram showing the structure of the interior of the demonstration box of this application is shown;

[0021] Figure 3 A schematic diagram of the structure of the separation storage rack of the present application is shown;

[0022] Figure 4 A schematic diagram of the structure of the base of the demonstration box of the present application is shown;

[0023] Figure 5 The schematic diagram of the structure of the demonstration box of this application is shown;

[0024] Figure 6 A schematic diagram of the structure of the present application in a decomposed state is shown.

[0025] Reference numerals list

[0026] 1. Demonstration box base; 101. Longitudinal guide rod; 102. Guide rod tension spring; 2. Drive motor; 3. Drive swivel; 301. Eccentric push column; 4. Demonstration box; 401. External guide plate of the box; 402. Longitudinal guide hole; 403. Ball outlet; 404. Ball conveying cylinder; 405. Ball inlet; 406. Rotating plugging plate; 407. Plug plate guide rail; 5. Probability display channel; 501. Channel outlet; 502. Magnetic block; 6. Separation storage rack; 7. Lifting plugging plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1: Please refer to Figures 1 to 6 :

[0029] The utility model proposes a probability demonstration device, comprising: a demonstration box base 1, a demonstration box body 4 is arranged above the demonstration box base 1, a driving motor 2 is installed at the rear of the upper surface of the demonstration box base 1 by screws, characterized in that the rotating shaft of the driving motor 2 is fixedly connected with a driving swivel 3 by a coupling, the driving swivel 3 is rotatably connected to the upper part of the demonstration box base 1 by a bearing, a probability display channel 5 is arranged at the bottom of the demonstration box body 4, a lifting plugging plate 7 is arranged at the right end of the probability display channel 5, the lifting plugging plate 7 is slidably connected to the right surface of the demonstration box body 4, a separation storage rack 6 with an "L"-shaped structure is fixedly connected inside the demonstration box body 4, four top corners of the upper surface of the demonstration box base 1 are respectively vertically welded with a self-guide rod 101, a guide rod tension spring 102 is sleeved on the self-guide rod 101, the lower end of the guide rod tension spring 102 is fixedly connected to the upper surface of the demonstration box base 1, and a downward pulling force is always applied to the demonstration box body 4 through the guide rod tension spring 102, so that the demonstration box body 4 can be reset.

[0030] In the disclosed embodiment, an eccentric push column 301 is installed on the driving shaft 3 through an interference fit, the axis of the eccentric push column 301 is parallel to the axis of the driving shaft 3 and the difference is 15-25mm, the eccentric push column 301 is slidably connected to the lower surface of the probability display channel 5, the demonstration box 4 is a transparent plastic box with a rectangular structure, and the lower edges of the front and rear surfaces of the demonstration box 4 are respectively fixedly connected with an outer guide plate 401 outside the box, and a longitudinal guide hole 402 is longitudinally penetrated on the outer guide plate 401 of the box, and the longitudinal guide hole 402 is connected to the self Multiple guide rods 101 are slidably connected; the driving motor 2 drives the driving shaft 3 to rotate. Under normal circumstances, the demonstration box 4 is always pushed downward by the tension of the guide rod tension spring 102, so that the lower surface of the probability display channel 5 is always in close contact with the outer surface of the eccentric push column 301. When the driving shaft 3 rotates a full circle, the eccentric push column 301 is driven to rotate. Due to the eccentric wheel structure of the eccentric push column 301, the eccentric push column 301 pushes the demonstration box 4 to jump once during the process of a full circle rotation, causing the colored balls inside the demonstration box 4 to jump.

[0031] In the disclosed embodiment, a circular ball outlet 403 is provided on the left side of the bottom of the demonstration box 4, and a ball conveying cylinder 404 is fixedly connected above the ball outlet 403. The ball conveying cylinder 404 is a cylindrical structure, and a colored ball inlet 405 is provided on the right side of the upper side of the demonstration box 4. When the colored balls bounce inside the demonstration box 4, there is a certain probability that they can enter through the upper end opening of the ball conveying cylinder 404, and pass through the ball conveying cylinder 404 through the ball outlet 403 to enter the probability display channel 5 for storage, thereby realizing the random outflow of the colored balls.

[0032] In the disclosed embodiment, a rotating blocking plate 406 is tightly hinged on the left edge of the ball inlet 405, and the rotating blocking plate 406 covers the ball inlet 405. A blocking plate guide rail 407 is fixedly connected to the right surface of the demonstration box 4. The cross-section of the blocking plate guide rail 407 is an "L"-shaped structure. The lifting blocking plate 7 is slidably connected inside the blocking plate guide rail 407 to play a guiding role. The colored balls inside the demonstration box 4 and the separation storage rack 6 can be stored and taken through the ball inlet 405, and the opening and sealing of the ball inlet 405 are controlled by rotating the blocking plate 406.

[0033] Embodiment 2, on the basis of embodiment 1, the probability display channel 5 is made of transparent plastic material, the probability display channel 5 is located below the ball outlet 403, a channel outlet 501 is opened at the right end of the probability display channel 5, a magnetic block 502 with a magnetic structure is fixedly connected to the bottom of the channel outlet 501, the magnetic block 502 is magnetically connected to the lifting plug 7 made of iron material, so as to strengthen the fixing effect of the lifting plug 7, and an inclined structure is provided at the bottom of the probability display channel 5, so that the colored balls can roll to the right for concentration.

[0034] The working principle of this embodiment is as follows: first, place the demonstration box base 1 on the desktop, take out the required number and color of colored balls from the separation storage rack 6, and put them into the demonstration box 4, then buckle the rotating blocking plate 406, turn on the driving motor 2, and drive the driving shaft 3 to rotate through the driving motor 2. When the driving shaft 3 rotates a full circle, the eccentric push column 301 is driven to rotate. Due to the eccentric wheel structure of the eccentric push column 301, the eccentric push column 301 pushes the demonstration box 4 to jump once during the full rotation of one circle, and is quickly pulled down and reset under the action of the guide rod tension spring 102, so that the colored balls inside the demonstration box 4 jump. When the colored balls jump inside the demonstration box 4, there is a certain probability that they can enter through the upper end opening of the ball conveying cylinder 404, and pass through the ball conveying cylinder 404 through the ball outlet 403 to enter the probability display channel 5 for storage, thereby realizing the random outflow of colored balls, observing the proportion of colored balls with different proportions, and calculating the probability.

Claims

1. A probability demonstration device, comprising: A demonstration box base, a demonstration box body is arranged above the demonstration box base, a driving motor is installed on the rear of the upper surface of the demonstration box base by screws, characterized in that the rotating shaft of the driving motor is fixedly connected to the driving swivel through a coupling, and the driving swivel is rotatably connected to the top of the demonstration box base through a bearing, a probability display channel is arranged at the bottom of the demonstration box body, a lifting plug plate is arranged at the right end of the probability display channel, and the lifting plug plate is slidably connected to the right surface of the demonstration box body, and an "L"-shaped separation storage rack is fixedly connected inside the demonstration box body.

2. A probability demonstration device according to claim 1, characterized in that: A self-guide rod is vertically welded at four top corners of the upper surface of the demonstration box base, and a guide rod tension spring is sleeved on the self-guide rod. The lower end of the guide rod tension spring is fixedly connected to the upper surface of the demonstration box base.

3. A probability demonstration device according to claim 1, characterized in that: An eccentric push column is installed on the driving shaft through interference fit, the axis of the eccentric push column is parallel to the axis of the driving shaft and the difference is 15-25mm, and the eccentric push column is slidably connected to the lower surface of the probability display channel.

4. A probability demonstration device according to claim 2, characterized in that: The demonstration box is a transparent plastic box with a rectangular structure. The lower edges of the front surface and the rear surface of the demonstration box are respectively fixedly connected with an outer guide plate of the box. The outer guide plate of the box is provided with a longitudinal guide hole running through it longitudinally, and the longitudinal guide hole is slidably connected with the multi-guide rod.

5. A probability demonstration device according to claim 1, characterized in that: A ball outlet with a circular structure is provided on the left bottom of the demonstration box, a ball conveying cylinder with a cylindrical structure is fixedly connected above the ball outlet, and a colored ball inlet is provided on the right top of the demonstration box.

6. A probability demonstration device according to claim 5, characterized in that: A rotating blocking plate is tightly hinged on the left edge of the ball insertion port, and the rotating blocking plate covers the ball insertion port. A blocking plate guide rail is fixedly connected to the right surface of the demonstration box, and the cross-section of the blocking plate guide rail is an "L"-shaped structure.

7. A probability demonstration device according to claim 5, characterized in that: The probability display channel is made of transparent plastic material, the probability display channel is located below the sphere outlet, a channel outlet is opened at the right end of the probability display channel, a magnetic block with a magnet structure is fixedly connected to the bottom of the channel outlet, and the magnetic block is magnetically connected to the lifting block plate made of iron material.

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