CN211087663U

CN211087663U - Mathematics teaching is with portable probability presentation device

Info

Publication number: CN211087663U
Application number: CN201922243831.2U
Authority: CN
Inventors: 杨德志
Original assignee: Eastern Liaoning University
Current assignee: Eastern Liaoning University
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-07-24
Anticipated expiration: 2029-12-12

Abstract

The utility model relates to a teaching presentation device technical field just discloses a mathematics teaching is with portable probability presentation device, which comprises a shell, the inside upside of casing transversely is equipped with the cylinder, the inside of cylinder is provided with a plurality of spheroids, a plurality of evenly distributed's play ball hole is seted up to the section of thick bamboo wall of cylinder, the inside of cylinder transversely is equipped with first pivot, the perforation that is used for first pivot to pass is all offered to the both sides center department of cylinder, the both ends of first pivot are all rotated through inside wall about first antifriction bearing and casing and are connected and the right-hand member runs through to the outside of casing, the shaft wall of first pivot just is located the fixed puddler that is equipped with a plurality of evenly distributed in the inside of cylinder, the fixed pipe that is equipped with in left side of cylinder. The utility model discloses portable, and can make the even stirring of the spheroid of cylinder inside get up, guaranteed spheroidal randomness.

Description

Mathematics teaching is with portable probability presentation device

Technical Field

The utility model relates to a teaching presentation device technical field especially relates to a mathematical education is with portable probability demonstration 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 the disciplines of mathematics, statistics, physics, artificial intelligence, computer science, philosophy, and the like, and the concept of probability is also often applied in life, such as risk assessment and trading in financial markets.

In the teaching of mathematics, probability presentation device often will be used for strengthening the student to the understanding of probability, but the stirring nature of the inside experimental spheroid of current probability presentation device is relatively poor, influences experimental spheroid's randomness easily to influence the randomness of mathematics probability demonstration.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art that probability presentation device is inside experimental spheroidal stirring nature relatively poor, influence experimental spheroidal randomness easily to influence the problem of the randomness of mathematics probability demonstration, and the portable probability presentation device is used in mathematical education that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a portable probability demonstration device for mathematical education comprises a shell, wherein a roller is transversely arranged on the upper side inside the shell, a plurality of balls are arranged inside the roller, a plurality of ball outlet holes which are uniformly distributed are formed in the wall of the roller, a first rotating shaft is transversely arranged inside the roller, through holes for the first rotating shaft to pass through are formed in the centers of two sides of the roller, two ends of the first rotating shaft are rotatably connected with the left inner side wall and the right inner side wall of the shell through first rolling bearings, the right end of the first rotating shaft penetrates through the outer part of the shell, a plurality of uniformly distributed stirring rods are fixedly arranged on the shaft wall of the first rotating shaft and positioned inside the roller, a fixed pipe is fixedly arranged on the left side of the roller, one end, far away from the roller, of the fixed pipe is rotatably connected with the left inner side wall of the shell through a second rolling bearing, an inner gear ring is fixedly arranged on the right side wall of the roller, and a first gear is fixedly arranged on, a second gear is meshed between the first gear and the inner gear ring together, a second rotating shaft is fixedly arranged on the inner wall of the second gear, the other end of the second rotating shaft is rotatably connected with the right inner side wall of the shell through a third rolling bearing, a ball receiving box is arranged on the inner wall of the bottom of the shell, and jacking mechanisms are arranged on the inner side wall of the shell and on two sides of the ball receiving box.

Preferably, two partition plates are fixedly arranged inside the ball receiving box and divide the inside of the ball receiving box into three areas.

Preferably, the tight mechanism in top includes sleeve, ejector pin, spring and kicking block, the sleeve is fixed to be set up on the inside wall of casing, the ejector pin slides and sets up in telescopic inside, the spring is fixed to be set up between the right-hand member of telescopic inside wall and ejector pin, the left end of ejector pin extend to telescopic outside and with kicking block fixed connection, the kicking block offsets with the lateral wall that connects the ball box and sets up.

Preferably, a rocking handle is fixedly arranged at one end of the first rotating shaft, which is positioned outside the shell.

Preferably, a U-shaped handle is fixedly arranged at the top of the shell.

Preferably, an opening is formed in the front side wall of the shell, and a shell cover is hinged to the opening.

Compared with the prior art, the utility model provides a mathematics teaching is with portable probability demonstration device possesses following beneficial effect:

1. this portable probability demonstration device is used in mathematical education, through setting up at the inside first pivot of casing, the puddler, fixed pipe, the ring gear, first gear, second gear and second pivot, can make epaxial stirring leaf of first pivot and cylinder rotatory towards opposite direction, thereby can make the even stirring of spheroid of cylinder inside get up, spheroidal randomness has been guaranteed, through setting up the box that connects in the casing bottom, can collect the spheroid that drops from the different ball hole insides of cylinder, thereby be convenient for observe mathematical probability.

2. This mathematical education is with portable probability presentation device through the U type handle that sets up at the casing top, and convenient to use person carries, through setting up sleeve, ejector pin, spring and kicking block in connecing ball box both sides, can will connect the inside of ball box top tightly at the casing.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses portable, and can make the even stirring of the spheroid of cylinder inside get up, guaranteed spheroidal randomness.

Drawings

Fig. 1 is a schematic structural view of a portable probability teaching demonstration device for mathematical education according to the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an overall view of the portable probability teaching demonstration device for mathematical education provided by the utility model;

fig. 4 is a schematic structural view of the connection between the sleeve and the jack in fig. 1.

In the figure: the device comprises a shell 1, a roller 2, a sphere 3, a first rotating shaft 4, a stirring rod 5, a fixing pipe 6, an annular gear 7, a first gear 8, a second gear 9, a second rotating shaft 10, a ball receiving box 11, a sleeve 12, a push rod 13, a spring 14, a push block 15, a partition plate 16, a ball outlet hole 17, a rocking handle 18, a U-shaped handle 19 and a shell cover 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-4, a portable probability demonstration device for mathematical education, comprising a shell 1, a roller 2 transversely arranged on the upper side of the interior of the shell 1, a plurality of balls 3 arranged in the roller 2, a plurality of ball outlet holes 17 uniformly distributed on the wall of the roller 2, a first rotating shaft 4 transversely arranged in the roller 2, through holes for the first rotating shaft 4 to pass through, arranged at the center of the two sides of the roller 2, two ends of the first rotating shaft 4 rotatably connected with the left and right inner side walls of the shell 1 through the first rolling bearing and the right end penetrating to the exterior of the shell 1, a rocking handle 18 fixedly arranged at one end of the first rotating shaft 4 located at the exterior of the shell 1, a plurality of uniformly distributed stirring rods 5 fixedly arranged on the shaft wall of the first rotating shaft 4 and located at the interior of the roller 2, a fixed pipe 6 fixedly arranged at the left side of the roller 2, one end of the fixed pipe 6 far away from the roller 2 rotatably connected with the left inner side wall of, the right side wall of cylinder 2 is fixed and is equipped with ring gear 7, the shaft wall of first pivot 4 just is located the inside fixed first gear 8 that is equipped with of ring gear 7, it has second gear 9 to mesh jointly between first gear 8 and the ring gear 7, the inner wall of second gear 9 is fixed and is equipped with second pivot 10, the other end of second pivot 10 passes through third antifriction bearing and is connected with the right side inner wall rotation of casing 1, the bottom inner wall of casing 1 is equipped with connects ball box 11, the inside wall of casing 1 just is located the both sides that connect ball box 11 and all is equipped with the tight mechanism in top.

Two clapboards 16 are fixedly arranged inside the ball receiving box 11 and divide the inside of the ball receiving box 11 into three areas, and when the ball body 3 falls out of the ball outlet hole 17, the ball body can fall into different areas inside the ball receiving box 11, so that the demonstration of mathematical probability is completed.

The tight mechanism in top includes sleeve 12, ejector pin 13, spring 14 and kicking block 15, sleeve 12 is fixed to be set up on the inside wall of casing 1, ejector pin 13 slides and sets up in the inside of sleeve 12, spring 14 is fixed to be set up between the inside wall of sleeve 12 and the right-hand member of ejector pin 13, the left end of ejector pin 13 extend to the outside of sleeve 12 and with kicking block 15 fixed connection, kicking block 15 sets up with the lateral wall counterbalance that connects ball box 11, can will connect the inside of ball box top tightly at the casing.

The top of the shell 1 is fixedly provided with a U-shaped handle 19, which is convenient for a user to carry.

The front side wall of the shell 1 is provided with an opening, and the opening is hinged with a shell cover 20, so that the operation of a user is convenient.

The utility model discloses in, during the use, user's hand rotates rocking handle 18 and makes first pivot 4 rotatory, first pivot 4 can drive a plurality of stirring leaves 5 rotatory and stir the mixture to the spheroid of cylinder 2 inside, meanwhile first gear 8 on the first pivot 4 can drive second gear 9 rotatory, second gear 9 can drive ring gear 7 rotatory, thereby can make cylinder 2 and first pivot 4's direction of rotation opposite rotation, and then can make 3 abundant mixings of the inside spheroid of cylinder 2, spheroid 3's randomness has been guaranteed, can fall in the inside different region of ball box 11 when spheroid 3 falls out from going out the ball hole 17, and then accomplished the demonstration of mathematics probability.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A portable probability demonstration device for mathematical teaching comprises a shell (1) and is characterized in that a roller (2) is transversely arranged on the upper side of the interior of the shell (1), a plurality of balls (3) are arranged in the roller (2), a plurality of ball outlet holes (17) which are uniformly distributed are formed in the wall of the roller (2), a first rotating shaft (4) is transversely arranged in the roller (2), through holes for the first rotating shaft (4) to pass through are formed in the centers of the two sides of the roller (2), the two ends of the first rotating shaft (4) are rotatably connected with the left inner side wall and the right inner side wall of the shell (1) through first rolling bearings, a plurality of uniformly distributed stirring rods (5) are fixedly arranged on the shaft wall of the first rotating shaft (4) and located in the roller (2), a fixing pipe (6) is fixedly arranged on the left side of the roller (2), the fixed pipe (6) is far away from one end of the roller (2) and is rotationally connected with the left inner side wall of the shell (1) through a second rolling bearing, an inner gear ring (7) is fixedly arranged on the right side wall of the roller (2), a first gear (8) is fixedly arranged on the shaft wall of the first rotating shaft (4) and located inside the inner gear ring (7), a second gear (9) is meshed between the first gear (8) and the inner gear ring (7) together, a second rotating shaft (10) is fixedly arranged on the inner wall of the second gear (9), the other end of the second rotating shaft (10) is rotationally connected with the right inner side wall of the shell (1) through a third rolling bearing, a ball receiving box (11) is arranged on the inner wall of the bottom of the shell (1), and jacking mechanisms are arranged on two sides of the inner side wall of the shell (1) and located on the ball receiving box (11).

2. The portable probability theory demonstration device for mathematics teaching as claimed in claim 1, wherein two partitions (16) are fixedly arranged inside the ball receiving box (11) and divide the inside of the ball receiving box (11) into three areas.

3. The portable probability science demonstration device for mathematical education as claimed in claim 1, wherein the tightening mechanism comprises a sleeve (12), a push rod (13), a spring (14) and a top block (15), the sleeve (12) is fixedly arranged on the inner side wall of the shell (1), the push rod (13) is slidably arranged inside the sleeve (12), the spring (14) is fixedly arranged between the inner side wall of the sleeve (12) and the right end of the push rod (13), the left end of the push rod (13) extends to the outside of the sleeve (12) and is fixedly connected with the top block (15), and the top block (15) is abutted to the side wall of the ball receiving box (11).

4. The portable probability teaching demonstration device for mathematics teaching as claimed in claim 1, wherein a rocking handle (18) is fixedly arranged at one end of the first rotating shaft (4) which is positioned outside the shell (1).

5. The portable probability teaching demonstration device for mathematics teaching as claimed in claim 1, wherein the top of said case (1) is fixed with a U-shaped handle (19).

6. The portable probability teaching demonstration device for mathematics teaching as claimed in claim 1, wherein the front side wall of said case (1) is provided with an opening, and the opening is hinged with a case cover (20).