Mathematical probability demonstration teaching aid

Abstract

The utility model discloses a mathematical probability demonstration teaching aid, which comprises a box body, one side of the box body is horizontally and fixedly connected with a plurality of placing racks, one end of each placing rack is provided with a placing port, one end of each placing rack far away from the placing port is provided with a slope, one side of the box body is provided with a ball inlet at a position corresponding to the slope, and the ball inlet is provided with a ball outlet at a position corresponding to the ball inlet. A groove is formed in one side of each placement frame, sliding assemblies are arranged at the two ends of each placement frame, each sliding assembly comprises a sliding block, the sliding blocks are in sliding clamping connection with the corresponding grooves, an insertion plate is inserted in the centers of the sliding blocks in a penetrating mode, a box cover is clamped to the top of the box body, and a rotating shaft is rotationally connected to the center of the inner side of the box cover; the bottom end of the rotating shaft is fixedly connected with a plurality of fixing rods. According to the utility model, through the arrangement of the placing rack, the open groove, the sliding assembly, the ball inlet, the box cover, the rotating shaft, the fixing rod and the rubber pad, time and labor are saved, uniform distribution is realized, and the teaching demonstration efficiency is improved.

Description

Technical Field

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

[0002] Probability is a mathematical concept used to describe the likelihood of a random event. In the specific problem of touching balls, probability can be obtained by calculating the ratio of the number of outcomes of a specific event to the number of all possible outcomes. For example, if there are 4 balls in a box, including 1 red ball, 1 green ball, and 2 white balls, the probability of touching a white ball each time after touching the ball twice in a row can be calculated by listing all possible outcomes. Probability demonstration teaching aids can help students understand complex and abstract mathematical concepts.

[0003] The Chinese patent with patent publication number CN214312285U discloses a probability demonstration teaching aid for teaching advanced mathematics, including a containing box, a slide groove is provided on one side of the containing box, a slider is slidably connected to the inner cavity of the slide groove, one end of the slider is fixedly connected to a rack, one side of the rack is meshed with a gear, one side of the gear is fixedly connected to a connecting shaft, the connecting shaft is rotatably connected to the inner cavity of the containing box, and the outer end of the connecting shaft is fixedly connected to a mixing plate, one end of the button is fixedly connected to a rotating rod, the rotating rod is rotatably connected to the inner cavity of the containing box, and the outer end of the containing box is hinged with a baffle, through the connecting shaft and the mixing plate, the rack drives the gear to rotate, the gear drives the connecting shaft to rotate, and then the connecting shaft drives the mixing plate to rotate, so that the mixing plate drives the black and white balls in the inner cavity of the containing box to stir and mix, thereby improving the randomness of the event, and through the rotating rod, the rotating rod rotates once and leaks a ball, which is convenient for statistics of probability events.

[0004] The existing mathematical probability demonstration teaching aids have the problems of small balls of various colors being mixed and stored together. When a certain number of small balls of different colors need to be added to the box, it takes a lot of time to count and divide the balls, and the operation is inconvenient. In order to overcome these disadvantages, the utility model provides a mathematical probability demonstration teaching aid. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and provides a mathematical probability demonstration teaching aid.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mathematical probability demonstration teaching aid, including a box body, one side of the box body is horizontally fixedly connected to a plurality of placement racks, one end of the placement rack is provided with a placement opening, the end of the placement rack away from the placement opening is provided with a slope, one side of the box body is provided with a goal opening at a position corresponding to the slope, one side of the placement rack is provided with a slot, one end of the slot is located on the side of the slope and is fixedly connected with a block, both ends of the placement rack are provided with sliding components, the sliding components include sliders, the sliders are slidably engaged with the corresponding slots, a plug plate is inserted through the center of the slider, a box cover is provided on the top of the box body, a rotating shaft is rotatably connected to the inner center of the box cover, and a plurality of fixing rods are fixedly connected to the bottom end of the rotating shaft.

[0007] Furthermore, the outer top of the slider is fixedly connected with a fixing plate, one end of the fixing plate is penetrated by a fixing bolt, the top of the plug plate is provided with a screw hole at a position corresponding to the fixing bolt, and the fixing bolt is threadedly connected with the corresponding screw hole.

[0008] Furthermore, a handle is fixedly connected to one end of the outer side of the plug board.

[0009] Furthermore, a handle is rotatably connected to the top side of the box cover at a position corresponding to the rotating shaft, and one end of the rotating shaft passes through the box cover and is fixedly connected to the handle.

[0010] Furthermore, a rubber pad is arranged around the inner bottom of the box body.

[0011] Furthermore, a ball-touching opening is provided on one side of the box.

[0012] Beneficial effects of the utility model:

[0013] When the utility model is used, the mathematical probability demonstration teaching aid has the following advantages:

[0014] 1. In this scheme, a placement rack, a slot, a sliding assembly, a slope, a goal hole, a block, a slider, an insert plate, a handle, a fixing plate, and a fixing bolt are provided. Through the placement hole, balls of different colors can be placed in the corresponding placement racks respectively, and the arrangement is orderly, so that a certain number of balls of different colors can be added to the box for a ball-touching test according to the demonstration needs. The sliding assembly is used to block the placement hole and the goal hole respectively. When it is necessary to put the ball back into the placement rack or add balls to the box, the corresponding fixing bolts are unscrewed, and the insert plate is pulled out by the handle. The ball can be put back into the corresponding placement rack through the placement hole, or added to the box through the corresponding slope and the goal hole. The slider can slide left and right along the slot to facilitate pushing the ball, and then the insert plate is reset. The insert plate can be fixed by screwing the fixing bolt into the screw hole again. The operation is orderly, and it is convenient to count the balls when adding balls, which saves time and effort, and improves the efficiency of teaching demonstration.

[0015] 2. In this scheme, a box cover, a rotating shaft, a fixed rod, a turning handle, and a rubber pad are provided. The turning handle drives the rotating shaft to rotate, so that the fixed rod disperses and mixes the small balls in the box to avoid uneven distribution. At the same time, the rubber pad in the box has a certain elasticity, which can buffer the collision between the ball and the side wall of the box, and can bounce the ball back to avoid getting stuck in a corner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 : Schematic diagram of the overall structure of the utility model;

[0018] Figure 2 : Another perspective structural schematic diagram of the utility model;

[0019] Figure 3 :The utility model Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 : Schematic diagram of the sliding assembly structure of the utility model;

[0021] Figure 5 : A side view of the utility model;

[0022] Figure 6 : A schematic cross-sectional view of the box body of the utility model;

[0023] Figure 7 : A schematic diagram of the back structure of the utility model.

[0024] The reference numerals are as follows:

[0025] 1. Box body; 2. Box cover; 3. Storage rack; 4. Slot; 5. Sliding assembly; 6. Slope; 7. Ball entrance; 8. Stopper; 9. Slider; 10. Insert plate; 11. Handle; 12. Fixing plate; 13. Fixing bolt; 14. Rotating shaft; 15. Fixing rod; 16. Turning handle; 17. Rubber pad; 18. Ball touch port. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.

[0027] like Figure 1-7 As shown, it relates to a mathematical probability demonstration teaching aid, including a box body 1, a plurality of placement racks 3 are horizontally fixedly connected to one side of the box body 1, a placement opening is opened at one end of the placement racks 3, and a slope 6 is arranged at the end of the placement racks 3 away from the placement opening, a goal opening 7 is opened at a position corresponding to the slope 6 on one side of the box body 1, a slot 4 is opened on one side of the placement racks 3, and a stopper 8 is fixedly connected to one end of the slot 4 located on one side of the slope 6, and sliding components 5 are arranged at both ends of the placement racks 3, and the sliding components 5 include sliders 9, and the sliders 9 are slidably engaged with the corresponding slots 4, and a plug plate 10 is inserted through the center of the slider 9, and a box cover 2 is clamped on the top of the box body 1, and a rotating shaft 14 is rotatably connected to the inner center of the box cover 2, and a plurality of fixing rods 15 are fixedly connected to the bottom end of the rotating shaft 14.

[0028] like Figure 1-7 As shown, the block 8 is used to limit the sliding assembly 5 near the goal entrance 7, the outer top end of the slider 9 is fixedly connected with a fixing plate 12, one end of the fixing plate 12 is penetrated by a fixing bolt 13, the top of the plug plate 10 is provided with a screw hole at a position corresponding to the fixing bolt 13, the fixing bolt 13 is threadedly connected with the corresponding screw hole, and the outer end of the plug plate 10 is fixedly connected with a pull handle 11, unscrew the corresponding fixing bolt 13, pull out the plug plate 10 through the pull handle 11, and screw the fixing bolt 13 into the screw hole to fix the plug plate 10.

[0029] like Figure 1-7As shown, the top side of the box cover 2 is located at a position corresponding to the rotating shaft 14 and is rotatably connected to a handle 16. One end of the rotating shaft 14 passes through the box cover 2 and is fixedly connected to the handle 16. The handle 16 is rotated to drive the rotating shaft 14 to rotate. The fixed rod 15 disperses and mixes the small balls in the box body 1 to avoid uneven distribution. Rubber pads 17 are arranged around the inner bottom of the box body 1. The rubber pads 17 have a certain elasticity and can cushion the collision between the ball and the side wall of the box body 1, and can bounce the ball back to avoid getting stuck in a corner. A ball touching opening 18 is opened on one side of the box body 1 to facilitate touching the ball.

[0030] Working principle: when in use, balls of different colors can be placed in corresponding placement racks 3 through the placement openings and arranged in order. A certain number of balls of different colors can be added to box 1 for a ball-touching test according to demonstration needs. The sliding assembly 5 close to the placement opening is used to block the placement opening, and the sliding assembly 5 close to the goal opening 7 is used to block the goal opening 7. When it is necessary to put the ball back into the placement rack 3 or add a ball to box 1, unscrew the corresponding fixing bolt 13, and pull out the plug plate 10 through the pull handle 11, and the ball can be put back into the corresponding placement rack 3 through the placement opening, or added to box 1 through the corresponding slope 6 and goal opening 7, and in The slider 9 can slide left and right along the slot 4 to facilitate pushing the ball, and then the plug plate 10 is reset, and the fixing bolt 13 is screwed into the screw hole again to fix it. When all the balls are added, the handle 16 is turned to drive the shaft 14 to rotate, and the fixing rod 15 disperses and mixes the small balls in the box 1 to avoid uneven distribution. At the same time, the rubber pad 17 in the box 1 has a certain elasticity, which can buffer the collision between the ball and the side wall of the box 1, and can bounce the ball back to avoid getting stuck in a corner. Finally, the ball touching test can be carried out through the ball touching port 18. During the test, balls can be continuously added. After the test, the balls are put back to the placement rack 3 in an orderly manner.

[0031] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A mathematical probability demonstration teaching aid, comprising a box (1), characterized in that: A plurality of placement racks (3) are horizontally fixedly connected to one side of the box body (1), a placement opening is provided at one end of each placement rack (3), a slope (6) is provided at one end of each placement rack (3) away from the placement opening, a ball opening (7) is provided at a position corresponding to the slope (6) on one side of each placement rack (3), a slot (4) is provided on one side of each placement rack (3), a stopper (8) is fixedly connected to one end of each slot (4) located on one side of the slope (6), a sliding assembly (5) is provided at both ends of each placement rack (3), the sliding assembly (5) comprises a slider (9), the slider (9) is slidably engaged with the corresponding slot (4), a plug plate (10) is inserted through the center of each slider (9), a box cover (2) is clamped on the top of the box body (1), a rotating shaft (14) is rotatably connected to the inner center of the box cover (2), and a plurality of fixing rods (15) are fixedly connected to the bottom end of the rotating shaft (14).

2. A mathematical probability demonstration teaching aid according to claim 1, characterized in that: The outer top end of the slider (9) is fixedly connected to a fixing plate (12), one end of the fixing plate (12) is penetrated by a fixing bolt (13), the top end of the plug plate (10) is provided with a screw hole at a position corresponding to the fixing bolt (13), and the fixing bolt (13) is threadedly connected to the corresponding screw hole.

3. A mathematical probability demonstration teaching aid according to claim 1, characterized in that: One end of the outside of the plug board (10) is fixedly connected with a pull handle (11).

4. A mathematical probability demonstration teaching aid according to claim 1, characterized in that: The top side of the box cover (2) is rotatably connected to a handle (16) at a position corresponding to the rotating shaft (14), and one end of the rotating shaft (14) passes through the box cover (2) and is fixedly connected to the handle (16).

5. A mathematical probability demonstration teaching aid according to claim 1, characterized in that: The inner bottom of the box body (1) is surrounded by a rubber pad (17).

6. A mathematical probability demonstration teaching aid according to claim 1, characterized in that: A ball-touching opening (18) is provided on one side of the box body (1).

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