CN113223380A

CN113223380A - Mathematics probability learning device

Info

Publication number: CN113223380A
Application number: CN202110552346.2A
Authority: CN
Inventors: 帅鲲; 郑雅匀; 王艳华; 伍冬梅
Original assignee: Chengdu College of University of Electronic Science and Technology of China
Current assignee: Chengdu College of University of Electronic Science and Technology of China
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-08-06

Abstract

The invention discloses a mathematical probability learning device which comprises a random stirring device, wherein the random stirring device is connected with a fastening shaft, a magnetic correction rod and a through hole roller are arranged on the fastening shaft, positive and negative magnetic poles are arranged at two ends of the magnetic correction rod, a magnetic correction disc is arranged at the outer side of the magnetic correction rod, an inner bag is arranged in the through hole roller, the inner bag is a hollow thin-wall cylinder, the lower end of the inner bag is provided with a bottom plate, the bottom plate is a middle raised table board, an inner hole is formed in the bottom plate, the through hole roller is a hollow thin-wall cylinder, the bottom of the through hole roller is provided with an annular bottom edge, and the annular bottom edge is provided with a plurality of outer holes. According to the invention, by arranging the random poking device and the magnetic force correcting device, any outer hole is connected with the inner hole to release the small balls with random numbers, the influence of external environment, force and angle applied by an experimenter and other poking habits is hardly caused, the independence and randomness of events are achieved, and the experimental result is ensured. The device has compact structure, convenient carrying, simple operation and convenient demonstration.

Description

Mathematics probability learning device

Technical Field

The invention belongs to the field of mathematics probability demonstration tools, and particularly relates to a mathematics probability learning device.

Background

Probability, also called probability, chance rate and probability, is the basic concept of mathematical probability theory, and is a real number between 0 and 1, which is a measure of the probability of a random event occurring. Probability can describe the intrinsic mechanism and regularity in a complex system, and is used in disciplines such as mathematics, statistics, physics, artificial intelligence, computer science, philosophy, and the like. In the teaching of mathematics, probability presentation device often can be used for strengthening the student and to the understanding of probability, but current probability presentation device, the structure is comparatively single, can only carry out the probability demonstration of simplex mode, and the operation is inconvenient, and its randomness receives the operation mode influence, and the individual produces the influence deviation to the randomness of experiment great, is unfavorable for promoting student's learning efficiency and mr's teaching efficiency. Therefore, in view of the above situation, it is necessary to develop a portable probability demonstration device for mathematical education to overcome the shortcomings in the current practical application.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention aims to provide a mathematical probability learning device, which comprises a random toggling device, wherein the random toggling device is connected with a fastening shaft, the fastening shaft is provided with a magnetic force correcting rod and a through hole drum, both ends of the magnetic force correcting rod are provided with positive and negative magnetic poles, a magnetic force correcting disc is arranged outside the magnetic force correcting rod, an inner bag is arranged in the through hole drum, the inner bag is a hollow thin-walled cylinder, the lower end of the inner bag is provided with a bottom plate, the bottom plate is a table top with a raised middle part, the bottom plate is provided with a plurality of inner holes, the through hole drum is a hollow thin-walled cylinder, the bottom of the through hole drum is provided with an annular bottom edge, and the annular bottom edge is provided with a plurality of outer holes.

Furthermore, the random poking device comprises a poking sheet and a driven gear, the poking sheet is provided with an incomplete gear, a reset spring and a pin hole, the upper end of the shell is provided with a pin, the pin is connected with the pin hole, and the pin is connected with the reset spring; the random poking device also comprises a ratchet wheel component, wherein the pawl end of the ratchet wheel component is arranged on the fastening shaft; the ratchet end of the ratchet wheel component is tightly connected with the driven gear, and the driven gear is meshed with the incomplete gear.

Further, the random dialing device is provided with an inertia assembly, and the inertia assembly is mounted on the fastening shaft.

Furthermore, the upper end of the outer hole is provided with an inserting piece groove, and an inserting piece is arranged in the inserting piece groove.

Furthermore, an annular inclined table is arranged below the through hole roller, and a cavity is formed between the annular inclined table and the bottom of the through hole roller.

Furthermore, a ball outlet is formed in one side of the lower end of the annular inclined table.

Furthermore, the magnetic force correction disc is an even number of regular polygon frame bodies, and positive magnetic poles and negative magnetic poles are arranged at the edge of the magnetic force correction disc and are distributed at intervals.

The invention has the beneficial effects that: the random poking device and the magnetic force correcting device are arranged, so that any outer hole is connected with the inner hole to release small balls with random numbers, the small balls are hardly influenced by external environments, force, angles and other poking habits imposed by experimenters, independence and randomness of events are achieved, and experimental results are guaranteed. The device has compact structure, convenient carrying, simple operation and convenient demonstration.

Drawings

FIG. 1 is an isometric cross-sectional view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is an enlarged view of a portion of the hole communication in the present invention;

FIG. 4 is a block diagram of the random dialing mechanism;

FIG. 5 is a schematic view before magnetic force correction;

FIG. 6 is a schematic view after magnetic force correction;

in the figure: 1-toggle device, 101-toggle piece, 104-driven gear, 1011-incomplete gear, 1012-reset spring, 1013-pin hole, 1014-pin, 106-ratchet wheel component, 105-fastening shaft, 102-mounting component, 103-inertia component, 2-magnetic force correcting rod, 4-through hole roller, 6-shell, 3-magnetic force correcting disk, 301-positive magnetic pole, 302-negative magnetic pole, 5-inner bag, 501-inner hole, 601-annular inclined table, 6011-cavity, 402-annular bottom edge, 401-outer hole, 4011-insert groove, 701-insert and 502-bottom plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "front", "rear", "left", "right", "bottom", "side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present embodiments.

In the description of the embodiments of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

The invention is further described with reference to the following figures and specific embodiments.

As shown in fig. 1 to 5, a mathematical probability learning device includes a random shifting device 1, the random shifting device 1 is connected with a fastening shaft 105, the fastening shaft 105 is provided with a magnetic force correction rod 2 and a through hole roller 4, both ends of the magnetic force correction rod 2 are provided with positive and negative magnetic poles, the outer side of the magnetic force correction rod 2 is provided with a magnetic force correction disc 3, the through hole roller 4 is internally provided with an inner bag 5, the inner bag 5 is a hollow thin-wall cylinder, the lower end of the inner bag 5 is provided with a bottom plate 502, the bottom plate 502 is a table top with a raised middle, the bottom plate 502 is provided with a plurality of inner holes 501, the through hole roller 4 is a hollow thin-wall cylinder, the bottom of the through hole roller 4 is provided. The device is further provided with a housing 6, on which housing 6 basic structures are arranged, such as threaded holes, cavities and brackets, which are not described in detail here.

As shown in fig. 4, the random dialing device 1 is provided with a dialing piece 101 and a driven gear 104, the dialing piece 101 is provided with an incomplete gear 1011, a return spring 1012 and a pin hole 1013, the upper end of the housing 6 is provided with a pin 1014, the pin 1014 is connected with the pin hole 1013, and the pin 1014 is connected with the return spring 1012; the random dialing device 1 further comprises a ratchet assembly 106, wherein the pawl end of the ratchet assembly 106 is arranged on the fastening shaft 105; the ratchet end of the ratchet assembly 106 is tightly connected with the driven gear 104, and the driven gear 104 is meshed with the incomplete gear 1011. Meanwhile, the random poking device 1 is provided with an inertia assembly 103, the middle of the inertia assembly 103 is provided with a mounting plate with a mounting hole, two ends of the mounting plate are of swing arm structures, the tail end of the swing arm is provided with a counterweight discus, and the whole inertia assembly 103 is fastened with the fastening shaft 105 through the mounting hole in the middle of the mounting plate. Inertia subassembly can make the whole rotation that fastening shaft 105, magnetic force correction pole 2 and through-hole cylinder 4 are constituteed have bigger angular momentum, increases the number of rotations, and the randomness that the outer hole 401 stops the region when the guarantee whole rotation stops.

As shown in fig. 1 to 5, the magnetic force correction disk 3 is an even regular polygon frame, and positive magnetic poles 301 and negative magnetic poles 302 are arranged at the edge of the magnetic force correction disk 3 and are distributed at intervals. Because the positive pole and the negative pole are distributed at intervals, the positive pole of the magnetic force correcting rod 2 stays in the area between the positive pole and the negative pole, and the positive pole on the magnetic force correcting rod 2 deflects to the negative pole on the magnetic force correcting disc 3 due to the magnetic force effect; similarly, the negative pole of the magnetic force correcting rod 2 will stay in the area between the opposite positive and negative poles, and due to the magnetic effect, the negative pole on the magnetic force correcting rod 2 will deflect towards the positive pole on the magnetic force correcting disc 3, forming a balance, so that the magnetic force correcting rod 2 will be opposite to two opposite sides of the polygon of the magnetic force correcting disc 3, and at the same time, the outer hole 401 at the bottom of the through hole roller 4 fastened with the magnetic force correcting rod 2 will also be aligned with the inner hole 501. The number of the outer holes 401 and the inner holes 501 should be the same as the number of the polygonal sides of the magnetic force correction disk 3, and the axis of the magnetic force correction rod 2 should be arranged to coincide with the line connecting the centers of two opposite outer holes 401 on the bottom side.

As shown in fig. 3-6, the upper end of the outer hole 401 is provided with a plug slot 4011, and a plug 701 is arranged in the plug slot 4011. An annular inclined platform 601 is arranged below the through hole roller 4, and a cavity 6011 is formed between the annular inclined platform 601 and the bottom of the through hole roller 4. A ball outlet 602 is arranged at one side of the lower end of the annular sloping platform 601. Before the experiment, the inserting pieces 701 are taken out or added according to the requirements such as the number of balls to be output and the intervals among the numbers of the balls, after the rotation is finished, when the inner holes and the outer holes are aligned, the small balls at the positions of the through holes of the inserting pieces 701 to be taken out fall out from the through holes and roll out along the inclined table 601 through the ball output port 602. One practical random experiment that the apparatus can now perform is provided: set up 10 bobbles in the inner bag, the serial number is 0-9, magnetic force revise dish 3 is positive 10 edges shape, now for insertion piece groove 4011 installation 9 inserted sheets 701, only leave an open outer hole, press the plectrum, rotate whole rotation, the outer hole 401 of no inserted sheet stops the position between 4 and 6 numbered balls, after top magnetic force revise pole 2 revises the position, no inserted sheet outer hole 401 deflects and aligns No. 6 ball place holes, fall out No. 6 balls, repeated experiment and statistics result can acquire the probability that each numbered ball rolled out.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.

Claims

1. A mathematical probability learning apparatus, characterized in that: including random toggle device (1), random toggle device (1) is connected with fastening shaft (105), is provided with magnetic force correction pole (2) and through-hole cylinder (4) on fastening shaft (105), and magnetic force correction pole (2) both ends are provided with the positive and negative magnetic pole, and magnetic force correction pole (2) outside is provided with magnetic force correction dish (3), is provided with interior bag (5) in through-hole cylinder (4), interior bag (5) are hollow thin wall section of thick bamboo, and interior bag (5) lower extreme has bottom plate (502), and bottom plate (502) are middle bellied mesa, are provided with a plurality of holes (501) on bottom plate (502), through-hole cylinder (4) are hollow thin wall section of thick bamboo, and through-hole cylinder (4) bottom is provided with annular base (402), and annular base (402) are provided with a plurality of outer holes (401).

2. The mathematical probability learning apparatus of claim 1, wherein: the random toggle device (1) is provided with a toggle piece (101) and a driven gear (104), the toggle piece (101) is provided with an incomplete gear (1011), a return spring (1012) and a pin hole (1013), the upper end of the shell (6) is provided with a pin (1014), the pin (1014) is connected with the pin hole (1013), and the pin (1014) is connected with the return spring (1012); the random toggle device (1) further comprises a ratchet wheel assembly (106), and the pawl end of the ratchet wheel assembly (106) is installed on the fastening shaft (105); the ratchet end of the ratchet assembly (106) is tightly connected with the driven gear (104), and the driven gear (104) is meshed with the incomplete gear (1011).

3. The mathematical probability learning apparatus of claim 2, wherein: the random toggle device (1) is provided with an inertia assembly (103), and the inertia assembly (103) is mounted on a fastening shaft (105).

4. The mathematical probability learning apparatus of claim 1, wherein: the upper end of the outer hole (401) is provided with an inserting piece groove (4011), and an inserting piece (701) is arranged in the inserting piece groove (4011).

5. The mathematical probability learning apparatus of claim 1, wherein: an annular inclined table (601) is arranged below the through hole roller (4), and a cavity (6011) is formed between the annular inclined table (601) and the bottom of the through hole roller (4).

6. The mathematical probability learning apparatus of claim 5, wherein: the lower end of the annular sloping table (601) is provided with a ball outlet (602).

7. The mathematical probability learning apparatus of claim 1, wherein: the magnetic force correction disc (3) is an even number regular polygon frame body, and positive magnetic poles (301) and negative magnetic poles (302) which are distributed at intervals are arranged on the edge of the magnetic force correction disc (3).