CN108320626A - A kind of portable mathematical probabilities demonstration device - Google Patents
A kind of portable mathematical probabilities demonstration device Download PDFInfo
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- CN108320626A CN108320626A CN201810316648.8A CN201810316648A CN108320626A CN 108320626 A CN108320626 A CN 108320626A CN 201810316648 A CN201810316648 A CN 201810316648A CN 108320626 A CN108320626 A CN 108320626A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
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Abstract
A kind of portable mathematical probabilities demonstration device,Including bottom plate,Motor is set on bottom plate,Motor connects bull stick,Bull stick is connect with rotating cylinder,Hollow ball is set in rotating cylinder,Placement plate is arranged in the top of rotating cylinder,Through-hole is opened up at the top of rotating cylinder,Vertical tube is set in placement plate,The upper setting exhaust fan of vertical tube,Tally is arranged in the top of placement plate,The horizontal fixed plate of tally rear setting,Display board is set in fixed plate,Groove is set on front side of display board,The bottom of groove opens up cloth bar groove,Cloth is set in cloth bar groove,Cloth is fixedly connected with mobile bar,Mobile bar is located in groove,On the side wall of groove both sides sliding slot is opened up with mobile bar corresponding position,The both ends of mobile bar can be moved up and down along corresponding sliding slot,One end of the top center position connection stay cord of mobile bar,Vertically arranged rope groove is opened up at the top of groove,Drawstring can pass through rope groove,The other end of drawstring can be located at the top of display board.It is of the invention can it is convenient it is lively explain probability with block diagram, explained convenient for teacher.
Description
Technical field
The invention belongs to art of mathematics, specifically a kind of portable mathematical probabilities demonstration device.
Background technology
Probability is the important knowwhy of art of mathematics, and current through being shown to probability frequently with block diagram and table
It states, generally use multimedia is come to the method with histogram graph representation probability in teaching process at present, but due to many schools
Educational resource is limited can not to install multimedia, and more difficulty is explained in teaching process so as to cause teacher.
Invention content
The present invention provides a kind of portable mathematical probabilities demonstration device, to solve defect in the prior art.
The present invention is achieved by the following technical programs：
Motor, institute is arranged in the top surface middle position of a kind of portable mathematical probabilities demonstration device, including bottom plate, the bottom plate
The bottom for the bull stick that the output axis connection for the motor stated is vertically arranged, the top of the bull stick and the lower center position of rotating cylinder
It is fixedly connected, the hollow ball of nine lightweights of setting in the rotating cylinder, reference numerals 1 to 9 successively on the hollow ball are described
Rotating cylinder top setting inverse u shape placement plate, the bottom corresponding position of the bottom plate and placement plate opens up the first slot,
The bottom of the placement plate can enter in the first slot, and the top center position of the rotating cylinder opens up through-hole, and described is logical
The diameter in hole is more than the diameter of hollow ball, and transparent vertical tube is arranged in the corresponding position of the placement plate and through-hole, and described is perpendicular
Exhaust fan is arranged in the top of pipe, and the internal diameter of the vertical tube is more than the diameter of hollow ball, the top setting meter of the placement plate
One piece of first support plate being vertically arranged, the bottom of the placement plate is respectively arranged in the two bottom sides of number plate, the tally
The second slot is opened up with the corresponding position of the first support plate, first support plate bottom and the second slot are mating, institute
It is divided into nine count blocks on the tally stated, nine count blocks is divided on the tally, the count block records successively
The occurrence number of 1-9 hollow balls is marked, the horizontal fixed plate of tally rear setting, the fixed plate bottom end is higher than
The top of tally, two bottom sides one piece of second support plate being vertically arranged of each setting of the fixed plate, described second
The bottom of support plate and the corresponding position of the second support plate open up third slot, and display board is arranged in the fixed plate, described
Display board on front side of nine grooves are set, the first graduation mark is arranged in the side of the groove, and the bottom of the groove opens up
Cloth is arranged in the cloth bar groove for cloth bar groove, and one end of the cloth is fixedly connected with cloth bar groove, the cloth it is another
One end is fixedly connected with mobile bar, and the mobile bar is located in groove, corresponding with mobile bar on the groove both sides side wall
Position opens up sliding slot, and the both ends of the mobile bar can be moved up and down along corresponding sliding slot, the center of top of the mobile bar
One end of position connection stay cord opens up vertically arranged rope groove at the top of the groove, and the drawstring can pass through drawstring
Slot, the other end of the drawstring can be located at the top of display board.
A kind of portable mathematical probabilities demonstration device as described above, the circle of display board rear side setting metal material
Fixed link, nine damping bearings of upper setting of the fixed link, each damping shaft is arranged in disk, the turntable center
One end of connection partition rod is held, the length of the partition rod is identical as the radius of disk, and nine bands are arranged on the disk
The second graduation mark is arranged in the periphery of magnetic plectane, the disk.
Flap, the fixation is arranged in the fixed plate in a kind of portable mathematical probabilities demonstration device as described above
The middle position setting of plate opens up turn trough, and shaft is arranged in the turn trough, and shaft lower rotation low with turn trough is connect,
The shaft is fixedly connected with the lower center position of flap, and the display board is mounted on flap.
Several be vertically arranged is arranged in a kind of portable mathematical probabilities demonstration device as described above, the bottom of the rotating cylinder
The bottom of telescopic rod, the telescopic rod is installed by universal wheel.
A kind of portable mathematical probabilities demonstration device as described above, the front and rear sides respectively setting one at the top of the rope groove
Block riser, the riser described in front side open up circular hole, are arranged pull rod in the circular hole, described one end be located at two risers it
Between, pressing plate is installed in the one end of the pull rod between two risers, and plate is held in the other end installation of the pull rod, described
Spring is arranged in the periphery of pull rod, and one end of the spring is fixedly connected with plate is held, the other end of the spring and front side
Riser be fixedly connected.
Limiting plate is arranged in the upper end of a kind of portable mathematical probabilities demonstration device as described above, the drawstring, described
Limiting plate can not pass through rope groove.
It is an advantage of the invention that：It is of the invention can it is convenient it is lively explain probability with block diagram, not only teacher is convenient for explain, but also just
Understand in student.Drum rotation is driven by motor when the present invention uses, to fully shake the hollow ball in rotating cylinder, then
The wind turbine of big wind-force starts extracts a hollow ball by through-hole and vertical tube out, while can easily be seen by transparent vertical tube
Number onto the hollow ball of extraction, then wind turbine close hollow ball and returned in rotating cylinder by vertical tube and through-hole, repeat above-mentioned behaviour
Make, often extract a hollow ball out and record in the corresponding count block of its tally once, thus convenient by corresponding hollow ball
Occurrence number is easily recorded, the motor stalls after the counting by certain time, according to what is recorded on tally
The number that the hollow ball of 1-9 occurs is marked to pull the drawstring of corresponding groove, to drive movable plate and cloth upward
It is mobile, the height of cloth in respective slot can be easily determined by the first graduation mark, replaced by cloth each in block diagram
The probability that hollow ball occurs, it is easy to operate, it is easy to use；Nine cloth colors are different simultaneously, so as to what is be more clear
It is demonstrated；Placement plate and bottom plate are mating simultaneously, and the first support plate and placement plate are mating, the second support plate and placement
Plate is mating, the present invention can be split into several parts when not in use convenient for placing, and be conveniently replaceable damage component, conveniently made
User uses.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the first structure schematic diagram of the present invention；
Fig. 2 is the second structural schematic diagram of the present invention；
Fig. 3 is the third structural schematic diagram of the present invention；
Fig. 4 is the partial enlarged view in the portions I of Fig. 2；
Fig. 5 is the partial enlarged view in the portions II of Fig. 3；
Fig. 6 is the partial enlarged view in the portions III of Fig. 3；
Fig. 7 is the partial enlarged view in the portions IV of Fig. 3；
Fig. 8 is the partial enlarged view in the portions V of Fig. 3；
Fig. 9 is the enlarged drawing of the A direction views of Fig. 5.
Reference numeral：1, bottom plate；2, motor；3, bull stick；4, rotating cylinder；5, hollow ball；6, placement plate；7, the first slot；8、
Through-hole；9, vertical tube；10, exhaust fan；11, tally；12, the first support plate；13, the second slot；14, fixed plate；15, second
Fagging；16, third slot；17, display board；18, groove；19, cloth bar groove；20, cloth；21, mobile bar；22, sliding slot；23, it draws
Rope；24, rope groove；25, the first graduation mark；26, disk；27, fixed link；28, damping bearing；29, partition rod；30, plectane；
31, flap；32, turn trough；33, shaft；34, telescopic rod；35, universal wheel；36, riser；37, circular hole；38, pull rod；39, pressing plate；
40, plate is held；41, spring；42, limiting plate；43, the second graduation mark.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Motor is arranged in the top surface middle position of a kind of portable mathematical probabilities demonstration device, including bottom plate 1, the bottom plate 1
2, the bottom for the bull stick 3 that the output axis connection of the motor 2 is vertically arranged, the bottom at the top and rotating cylinder 4 of the bull stick 3
Middle position is fixedly connected, the hollow ball 5 of nine lightweights of setting in the rotating cylinder 4, reference numerals successively on the hollow ball 5
Word 1 to 9, the placement plate 6 of the top setting inverse u shape of the rotating cylinder 4, the bottom plate 1 position corresponding with the bottom of placement plate 6
It sets and opens up the first slot 7, the bottom of the placement plate 6 can enter in the first slot 7, the center of top position of the rotating cylinder 4
It sets and opens up through-hole 8, the diameter of the through-hole 8 is more than the diameter of hollow ball 5, the corresponding position of the placement plate 6 and through-hole 8
Transparent vertical tube 9 is set, and exhaust fan 10 is arranged in the top of the vertical tube 9, and the internal diameter of the vertical tube 9 is more than hollow ball 5
Tally 11 is arranged in the top of diameter, the placement plate 6, and respectively one piece of setting is set the two bottom sides of the tally 11 vertically
The first support plate 12 set, the bottom of the placement plate 6 and the corresponding position of the first support plate 12 open up the second slot 13, institute
12 bottom of the first support plate and the second slot 13 stated are mating, and nine count blocks are divided on the tally 11, described
Tally 11 on be divided into nine count blocks, the occurrence number of count block recording mark 1-9 hollow balls 5 successively is described
The horizontal fixed plate 14 of 11 rear of tally setting, 14 bottom end of fixed plate is higher than the top of tally 11, described
Each one piece of second support plate 15 being vertically arranged of setting of the two bottom sides of fixed plate 14, the bottom of second support plate 15 with
The corresponding position of second support plate 15 opens up third slot 16, and display board 17, the displaying is arranged in the fixed plate 14
Nine grooves 18 are arranged in 17 front side of plate, and the first graduation mark 25, the bottom of the groove 18 is arranged in the side of the groove 18
Cloth bar groove 19 is opened up, cloth 20 is set in the cloth bar groove 19, one end of the cloth 20 is fixedly connected with cloth bar groove 19,
The other end of the cloth 20 is fixedly connected with mobile bar 21, and the mobile bar 21 is located in groove 18, the groove
Sliding slot 22 is opened up on 18 both sides side walls with 21 corresponding position of mobile bar, the both ends of the mobile bar 21 can be along corresponding sliding slot 22
It moves up and down, the top of one end of the top center position connection stay cord 23 of the mobile bar 21, the groove 18 opens up
Vertically arranged rope groove 24, the drawstring 23 can pass through rope groove 24, the other end of the drawstring 23 that can be located at displaying
The top of plate 17.Rotating cylinder 4 is driven to rotate by motor when the present invention uses, to which the hollow ball 5 in rotating cylinder 4 fully be shaken,
Then the wind turbine 10 of big wind-force starts extracts a hollow ball 5 by through-hole 8 out with vertical tube 9, while passing through transparent 9 energy of vertical tube
Enough numbers easily seen on the hollow ball 5 of extraction, then the closing hollow ball 5 of wind turbine 10 is returned to by vertical tube 9 and through-hole 8 turns
In cylinder 4, aforesaid operations are repeated, a hollow ball 5 is often extracted out and is recorded in its 11 corresponding count block of tally once, to just
Victory is easily recorded the occurrence number of corresponding hollow ball 5, and motor 2 stops turning after the counting by certain time
Dynamic, the number occurred according to the hollow ball 5 of the label 1-9 recorded on tally 11 is to pull the drawstring of corresponding groove 18
25, to drive movable plate 21 and cloth 20 to move up, respective slot 18 can easily be determined by the first graduation mark 25
The height of interior cloth 20 replaces the probability that each hollow ball 5 occurs in block diagram by cloth, easy to operate, easy to use；Together
When nine 20 colors of cloth it is different, so as to what is be more clear demonstrate；Placement plate 6 and bottom plate 1 are mating simultaneously,
First support plate 12 and placement plate 6 are mating, and the second support plate 15 and placement plate 6 are mating, when not in use can be by this
Invention splits into several parts convenient for placing, and is conveniently replaceable damage component, user-friendly.
Specifically, due to also being demonstrated probability using cake chart in usual teaching material, teacher is in no multimedia
It is more laborious when explanation, in order to overcome the above problem, the disk of the 17 rear side setting metal material of display board described in the present embodiment
26, the turntable center is arranged fixed link 27, nine damping bearings 28 of upper setting of the fixed link 27, each described
Damping bearing 28 connects one end of partition rod 29, the length of the partition rod 29 circle identical as the radius of disk 26, described
Nine magnetic plectanes 30 are set on disk 26, and the second graduation mark 43 is arranged in the periphery of the disk 26.(due to usual teaching material
In also probability is demonstrated using cake chart, teacher is more laborious when no multimedia is explained, in order to overcome above-mentioned ask
Topic) by rotating partition rod 29 can disk 26 be easily divided into nine regions, while milling the second graduation mark 43 can be convenient
The number occurred according to the hollow ball 5 of the label 1-9 recorded on tally 11 marks off corresponding region, while passing through damping
Bearing 28 effectively avoids partition rod 29 from rotating when being moved to designated position, it is ensured that the present invention normally demonstrates, in order to just
In differentiating each region, one block of plectane 30 is placed in corresponding region, digital 1-9 is indicated successively on plectane 30, in order to apparent
Demonstration, different colors can be set on nine plectanes 30, be convenient for student viewing.
Specifically, being to need mobile a whole set of dress due to being converted back and forth in block diagram apparatus for demonstrating and cake chart apparatus for demonstrating
It sets, than easy to operation, in order to overcome the above problem, flap 31, the fixation is set in the fixed plate 14 described in the present embodiment
The middle position setting of plate 14 opens up turn trough 32, shaft 33 is arranged in the turn trough 32, the shaft 33 is low with turn trough 32
Lower rotation connects, and the shaft 33 is fixedly connected with the lower center position of flap 31, and the display board 17 is mounted on
On flap 31.It can easily be converted back and forth in block diagram apparatus for demonstrating and cake chart apparatus for demonstrating by rotating flap 31, side
Just teacher uses.
Further, due to rotating cylinder 4, stability is poor in rotation process, in order to overcome the above problem, the present embodiment institute
Several telescopic rods 34 being vertically arranged are arranged in the bottom for the rotating cylinder 4 stated, and universal wheel 35 is installed in the bottom of the telescopic rod 34.It is logical
Stability of the rotating cylinder 4 in rotation process can effectively be increased by crossing telescopic rod 34 and everything wheel 35, it is ensured that normal use of the present invention.
Further, due to drawstring 23 when being drawn to designated position can not convenient fixation, be not convenient to use, in order to gram
The above problem is taken, one piece of riser 36 is respectively arranged in the front and rear sides at 24 top of rope groove described in the present embodiment, perpendicular described in front side
Plate 36 opens up circular hole 37, pull rod 28 is arranged in the circular hole, the 38 described one end is between two risers 36, the drawing
Pressing plate 39 is installed in the one end of bar 38 between two risers 36, and plate 40 is held in the other end installation of the pull rod 38, described
Spring 41 is arranged in the periphery of pull rod 38, and one end of the spring 41 is fixedly connected with holding plate 40, the spring 41 it is another
One end is fixedly connected with the riser 36 of front side.Lead to pull when drawstring 23 is drawn to designated position and holds the drive shifting of pull rod 38 of plate 40
It is dynamic, to drive briquetting to move, between drawstring 23 is put into two risers 36, unclamps and hold plate 40, pull rod 38 is acted in spring 41
Lower reset facilitates teacher to use to push down drawstring 23 with dynamic pressure plate 39.
Further, since the end of drawstring 23 is easily fallen into rope groove 24, inconvenience uses, in order to overcome above-mentioned ask
It inscribes, limiting plate 42 is arranged in the upper end of the drawstring 24 described in the present embodiment, and the limiting plate 42 can not pass through rope groove 24.Pass through
Limiting plate 42 can effectively avoid the end of drawstring 23 from falling into rope groove 24, it is ensured that normal use of the present invention.
Embodiment
Motor is arranged in the top surface middle position of a kind of portable mathematical probabilities demonstration device, including bottom plate 1, the bottom plate 1
2, the bottom for the bull stick 3 that the output axis connection of the motor 2 is vertically arranged, the bottom at the top and rotating cylinder 4 of the bull stick 3
Middle position is fixedly connected, and several telescopic rods 34 being vertically arranged are arranged in the bottom of the rotating cylinder 4, the telescopic rod 34
Universal wheel 35 is installed in bottom, the hollow ball 5 of nine lightweights of setting in the rotating cylinder 4, reference numerals successively on the hollow ball 5
Word 1 to 9, the placement plate 6 of the top setting inverse u shape of the rotating cylinder 4, the bottom plate 1 position corresponding with the bottom of placement plate 6
It sets and opens up the first slot 7, the bottom of the placement plate 6 can enter in the first slot 7, the center of top position of the rotating cylinder 4
It sets and opens up through-hole 8, the diameter of the through-hole 8 is more than the diameter of hollow ball 5, the corresponding position of the placement plate 6 and through-hole 8
Transparent vertical tube 9 is set, and exhaust fan 10 is arranged in the top of the vertical tube 9, and the internal diameter of the vertical tube 9 is more than hollow ball 5
Tally 11 is arranged in the top of diameter, the placement plate 6, and respectively one piece of setting is set the two bottom sides of the tally 11 vertically
The first support plate 12 set, the bottom of the placement plate 6 and the corresponding position of the first support plate 12 open up the second slot 13, institute
12 bottom of the first support plate and the second slot 13 stated are mating, and nine count blocks are divided on the tally 11, described
Tally 11 on be divided into nine count blocks, the occurrence number of count block recording mark 1-9 hollow balls 5 successively is described
The horizontal fixed plate 14 of 11 rear of tally setting, flap 31 is set in the fixed plate 14, the fixed plate 14
Middle position setting opens up turn trough 32, and shaft 33 is arranged in the turn trough 32, and the shaft 33 bottom low with turn trough 32 turns
Dynamic connection, the shaft 33 are fixedly connected with the lower center position of flap 31, and the display board 17 is mounted on flap 31
On, 14 bottom end of fixed plate is higher than the top of tally 11, and respectively one piece of setting is perpendicular for the two bottom sides of the fixed plate 14
The second support plate 15 being directly arranged, the bottom of second support plate 15 open up third with the corresponding position of the second support plate 15
Display board 17 is arranged in the fixed plate 14, flap 31, the fixed plate 14 is arranged in the fixed plate 14 for slot 16
Middle position setting open up turn trough 32, shaft 33, the shaft 33 bottom low with turn trough 32 are set in the turn trough 32
Rotation connection, the shaft 33 are fixedly connected with the lower center position of flap 31, and the display board 17 is mounted on flap
On 31, nine grooves 18 are arranged in 17 front side of display board, and the first graduation mark 25 is arranged in the side of the groove 18, described
The bottom of groove 18 open up cloth bar groove 19, cloth 20, one end of the cloth 20 and cloth are set in the cloth bar groove 19
Bar groove 19 is fixedly connected, and the other end of the cloth 20 is fixedly connected with mobile bar 21, and the mobile bar 21 is located at groove
In 18, sliding slot 22, the both ends of the mobile bar 21 are opened up with 21 corresponding position of mobile bar on the 18 both sides side wall of groove
It can be moved up and down along corresponding sliding slot 22, one end of the top center position connection stay cord 23 of the mobile bar 21 is described
The top of groove 18 opens up vertically arranged rope groove 24, and the drawstring 23 can pass through rope groove 24, the drawstring 23
The other end can be located at the top of display board 17, and one piece of riser 36, front side is respectively arranged in the front and rear sides at 24 top of rope groove
The riser 36 opens up circular hole 37, and pull rod 28 is arranged in the circular hole, the 38 described one end between two risers 36,
Pressing plate 39 is installed in the one end of the pull rod 38 between two risers 36, and plate is held in the other end installation of the pull rod 38
40, spring 41 is arranged in the periphery of the pull rod 38, and one end of the spring 41 is fixedly connected with plate 40 is held, the bullet
The other end of spring 41 is fixedly connected with the riser 36 of front side, and limiting plate 42,42 nothing of limiting plate is arranged in the upper end of drawstring 24
Method is fixed by rope groove 24, the disk 26 of the 17 rear side setting metal material of display board, turntable center setting
Bar 27, nine damping bearings 28 of upper setting of the fixed link 27, each damping bearing 28 connect partition rod 29
The length of one end, the partition rod 29 is identical as the radius of disk 26, and nine magnetic circles are arranged on the disk 26
The second graduation mark 43 is arranged in the periphery of plate 30, the disk 26.
Finally it should be noted that：In description of the invention, it is to be understood that term " top ", " bottom ", " one end ",
" other end ", " top ", " bottom end ", "upper", "lower", "left", "right", " side ", "inner", " middle part ", " center ", " both ends " etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, do not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and
Operation, therefore be not considered as limiting the invention.In the present invention unless specifically defined or limited otherwise, term " peace
The terms such as dress ", " setting ", " connection ", " fixation ", " rotation connection " shall be understood in a broad sense, for example, can be fixedly connected,
Can be detachably connected, or it is integral；It can be mechanical connection, also can be electrical connection；Can be connected directly, also can
Indirectly connected through an intermediary, can be the interaction relationship of connection or two elements inside two elements, unless separately
There is specific restriction, for the ordinary skill in the art, can understand above-mentioned term in this hair as the case may be
Concrete meaning in bright.The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to aforementioned
Invention is explained in detail for embodiment, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned
Technical solution recorded in each embodiment is modified or equivalent replacement of some of the technical features；And these are repaiied
Change or replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of portable mathematical probabilities demonstration device, it is characterised in that：Including bottom plate (1), the top surface center of the bottom plate (1)
Motor (2), the bottom for the bull stick (3) that the output axis connection of the motor (2) is vertically arranged, the bull stick is arranged in position
(3) top is fixedly connected with the lower center position of rotating cylinder (4), the hollow ball of nine lightweights of setting in the rotating cylinder (4)
(5), the placement plate of inverse u shape is arranged in reference numerals 1 to 9, the top of the rotating cylinder (4) successively on the hollow ball (5)
(6), the bottom plate (1) and the bottom corresponding position of placement plate (6) open up the first slot (7), the bottom of the placement plate (6)
Portion can enter in the first slot (7), and the top center position of the rotating cylinder (4) opens up through-hole (8), the through-hole (8)
Diameter is more than the diameter of hollow ball (5), and transparent vertical tube (9) is arranged in the placement plate (6) and the corresponding position of through-hole (8),
The top setting exhaust fan (10) of the vertical tube (9), the internal diameter of the vertical tube (9) is more than the diameter of hollow ball (5), described
Placement plate (6) top setting tally (11), respectively one piece of setting is vertically arranged for the two bottom sides of the tally (11)
The first support plate (12), the bottom of the placement plate (6) and the corresponding position of the first support plate (12) open up the second slot
(13), the first support plate (12) bottom and the second slot (13) are mating, are divided into nine on the tally (11)
A count block, the horizontal fixed plate (14) of the tally (11) rear setting, the fixed plate (14) bottom end is higher than meter
One piece of second support plate (15) being vertically arranged respectively is arranged in the two bottom sides on the top of number plate (11), the fixed plate (14),
The bottom of second support plate (15) opens up third slot (16) with the corresponding position of the second support plate (15), and described consolidates
Display board (17) is set on fixed board (14), nine grooves (18), the groove (18) are set on front side of the display board (17)
Side be arranged the first graduation mark (25), the bottom of the groove (18) opens up cloth bar groove (19), the cloth bar groove (19)
One end of interior setting cloth (20), the cloth (20) is fixedly connected with cloth bar groove (19), the cloth (20) it is another
End is fixedly connected with mobile bar (21), and the mobile bar (21) is located in groove (18), groove (18) both sides side wall
Upper and mobile bar (21) corresponding position opens up sliding slot (22), and the both ends of the mobile bar (21) can be along corresponding sliding slot (22)
Lower movement, one end of the top center position connection stay cord (23) of the mobile bar (21), the top of the groove (18)
Open up vertically arranged rope groove (24), the drawstring (23) can pass through rope groove (24), the drawstring (23) it is another
End can be located at the top of display board (17).
2. a kind of portable mathematical probabilities demonstration device according to claim 1, it is characterised in that：The display board (17)
Rear side be arranged metal material disk (26), the turntable center be arranged fixed link (27), the fixed link (27) it is upper
Nine damping bearings (28), one end of each damping bearing (28) connection partition rod (29), the partition rod are set
(29) length is identical as the radius of disk (26), and nine magnetic plectanes (30) are arranged on the disk (26), described
Disk (26) periphery be arranged the second graduation mark (43).
3. a kind of portable mathematical probabilities demonstration device according to claim 2, it is characterised in that：The fixed plate (14)
The middle position setting of upper setting flap (31), the fixed plate (14) opens up turn trough (32), is set in the turn trough (32)
Shaft (33) is set, the shaft (33) lower rotation low with turn trough (32) is connect, the shaft (33) and flap (31)
Lower center position is fixedly connected, and the display board (17) is mounted on flap (31).
4. a kind of portable mathematical probabilities demonstration device according to claim 1, it is characterised in that：The rotating cylinder (4)
Several telescopic rods (34) being vertically arranged, the bottom installation universal wheel (35) of the telescopic rod (34) is arranged in bottom.
5. a kind of portable mathematical probabilities demonstration device according to claim 1, it is characterised in that：The rope groove (24)
The each one piece of riser (36) of setting in the front and rear sides at top, the riser (36) described in front side open up circular hole (37), in the circular hole
Pull rod (28) is set, and between two risers (36), the pull rod (38) is located at two risers (36) for the one end of (38)
Between one end installation pressing plate (39), the pull rod (38) the other end installation hold plate (40), the pull rod (38)
Spring (41) is arranged in periphery, and one end of the spring (41) is fixedly connected with holding plate (40), the spring (41) it is another
One end is fixedly connected with the riser (36) of front side.
6. a kind of portable mathematical probabilities demonstration device according to claim 1, it is characterised in that：The drawstring (24)
Limiting plate (42) is arranged in upper end, and the limiting plate (42) can not pass through rope groove (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810316648.8A CN108320626A (en) | 2018-04-10 | 2018-04-10 | A kind of portable mathematical probabilities demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110148316A (en) * | 2019-07-01 | 2019-08-20 | 淮阴师范学院 | A kind of Mathematical probability statistics principle degree of fitting apparatus for demonstrating |
| CN110533995A (en) * | 2019-09-03 | 2019-12-03 | 盐城师范学院 | A kind of applied mathematics probability statistics compiling device |
| CN111833696A (en) * | 2020-07-31 | 2020-10-27 | 河南工业职业技术学院 | Interactive learning device of english teaching |
| CN112258940A (en) * | 2020-11-23 | 2021-01-22 | 江西农业大学 | Linear analysis display device for economic management |
| CN113763781A (en) * | 2021-09-16 | 2021-12-07 | 山东旅游职业学院 | Interactive device for English teaching and use method thereof |
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| CN113763781A (en) * | 2021-09-16 | 2021-12-07 | 山东旅游职业学院 | Interactive device for English teaching and use method thereof |
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Application publication date: 20180724 |