CN113593370A - Teaching equipment for guiding children to correctly learn - Google Patents
Teaching equipment for guiding children to correctly learn Download PDFInfo
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- CN113593370A CN113593370A CN202110867321.1A CN202110867321A CN113593370A CN 113593370 A CN113593370 A CN 113593370A CN 202110867321 A CN202110867321 A CN 202110867321A CN 113593370 A CN113593370 A CN 113593370A
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- 241001310793 Podium Species 0.000 claims description 51
- 238000003466 welding Methods 0.000 claims description 21
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 14
- 230000033001 locomotion Effects 0.000 abstract description 11
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 14
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 14
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008451 emotion Effects 0.000 description 1
- 230000036630 mental development Effects 0.000 description 1
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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
- G09B19/00—Teaching not covered by other main groups of this subclass
- G09B19/02—Counting; Calculating
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B19/00—Reading-desks; Lecterns; Pulpits, i.e. free-standing
- A47B19/10—Reading-desks; Lecterns; Pulpits, i.e. free-standing characterised by association with auxiliary devices, e.g. paper clamps, line indicators
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Abstract
The invention provides teaching equipment for guiding children to learn correctly, and relates to the technical field of teaching equipment. A teaching device for guiding children to learn correctly comprises a rotating assembly, wherein a digital gear is arranged inside the rotating assembly. This a teaching equipment for guiding children's correct study, every turn knob algorithm gear can rotate the quarter, and the pull rod makes a round trip to draw once, and digital gear rotates one tenth to the effect that the high digital display of device accuracy is accurate has been reached. The student pulls the pull rod back and forth for many times, and needs to use certain strength, thereby achieving the effect of driving the interesting movement of the children and improving the comprehensive development of the body and mind of the children. The rotary knob of the teacher is rotated, and the students on the left side and the right side of the platform pull the pull rod back and forth for a plurality of times, so that a simple arithmetic question is formed inside the three square holes on the front side of the platform, and the effects of being convenient for arousing the interest of children, improving the attention of the children and effectively guiding the children to learn correctly are achieved.
Description
Technical Field
The invention relates to the technical field of teaching equipment, in particular to teaching equipment for guiding children to learn correctly.
Background
The teaching equipment refers to teaching or scientific research instruments and equipment used in teaching and scientific research units. The existing teaching mode is relatively old, so that children cannot be interested in learning mathematics, often have dispersed attention and listen to the teaching carelessly, and even can have aversive and conflicting emotions to the mathematics, so that the teaching quality is seriously influenced, the teaching work and the mathematics score of the children are not facilitated, the children are good at moving, the exercise opportunity is lacked in a classroom, the opportunity that the children do small actions in the classroom is greatly improved, and the children are not facilitated to concentrate on learning.
In order to solve the problems, the teaching equipment for guiding the children to learn correctly is provided, and has the advantages of being convenient for attracting the interests of the children, improving the attention of the children, effectively guiding the children to learn correctly, driving interesting motions of the children, improving the comprehensive physical and mental development of the children and the like.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a teaching equipment for guiding children correct study, includes runner assembly, runner assembly's inside is provided with digital gear, the left positive meshing of digital gear is connected with second drive gear, second drive gear's left side welding has first carousel, the top transmission of first carousel is connected with the belt, the internal transmission of belt bottom is connected with the second carousel, the chute has been seted up to the inside of second carousel, the inside fixedly connected with supporting spring of chute, one side fixedly connected with movable block of chute is kept away from to supporting spring, the right side joint of movable block has the ratchet.
Still including taking exercise the subassembly, the inside of taking exercise the subassembly is provided with the pull rod, the right side welding of pull rod has the horizontal pole, the right side welding of horizontal pole has the slider, the outer wall sliding connection of slider has the spout, the left side fixedly connected with compression spring of spout, the top welding of horizontal pole has the push rod, the top sliding connection of push rod has the ring channel, the outer wall of ring channel is provided with the cylinder.
Still include the podium, the quad slit has been seted up in the front of podium, the top of podium is provided with the knob, the bottom welding of knob has first drive gear, first drive gear's back meshing is connected with the algorithm gear, the inside bottom of podium is provided with the exercise subassembly, the inside of podium is provided with rotating assembly.
Preferably, the right side of the ratchet wheel is fixedly connected with the left side of the cylinder.
Preferably, the left side riveting of movable block is in the inside of chute, and the left side of movable block and the inside left side joint of chute, the inside riveting of second carousel has and is no less than four movable blocks.
Preferably, the left side and the right side of the inside of podium all are provided with digital gear, digital gear's the even number that is provided with 0 to 9 in front, and the number at its positive top just in the inside of quad slit, the diameter of second drive gear is one fifth of digital gear diameter.
Preferably, the surface of the cylinder is provided with an annular groove, and the annular groove is of an end-to-end annular structure.
Preferably, one side of the compression spring, which is far away from the sliding groove, is fixedly connected to the outer wall of the cross rod.
Preferably, the left and right sides of podium all is provided with the pull rod, the front of podium is even is provided with three quad slit.
Preferably, the diameter of the first driving gear is one fourth of the diameter of the algorithm gear, four operation symbols of addition, subtraction, multiplication and division are uniformly arranged on the front face of the algorithm gear, and the operation symbol on the top of the front face of the algorithm gear is just positioned inside the square hole in the middle position of the front face of the platform.
Compared with the prior art, the invention provides teaching equipment for guiding children to learn correctly, which has the following beneficial effects:
1. this a teaching equipment for guiding children correct study, through knob and first drive gear, the algorithm gear, the knob, the quad slit, the pull rod, digital gear's cooperation is used, rotatory knob, first drive gear drives algorithm gear at this moment and rotates, the round knob algorithm gear of every rotation can rotate the quarter, add and subtract this moment and multiply and divide four operation symbols can appear in the inside of the positive intermediate position quad slit of podium respectively, the pull rod makes a round trip to stimulate once, digital gear rotates ten times, the positive figure of digital gear can be in the inside of quad slit all the time this moment, thereby the accurate effect of device accuracy high digital display has been reached.
2. This a teaching equipment for guiding children correct study uses through pull rod and horizontal pole, compression spring's cooperation, and the student makes a round trip to stimulate the pull rod many times, and compression spring's elasticity needs to be overcome in the motion of horizontal pole this moment, and the student needs to use certain strength this moment to reached and driven children's taste motion and improved the effect that children's body and mind developed comprehensively.
3. This a teaching equipment for guiding children correct study uses through the cooperation of knob and pull rod, podium, quad slit, and the rotatory knob of teacher for the podium left and right sides student makes a round trip to stimulate the pull rod many times for the inside simple arithmetic problem of forming one of the positive three quad slit of podium improves student and teacher interdynamic, thereby has reached and is convenient for arouse children interest, improve children's attention, effectively guides the effect that children correctly study.
Drawings
FIG. 1 is a schematic front view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the structure A of FIG. 1 according to the present invention;
FIG. 3 is a schematic cross-sectional view of the platform structure of the present invention;
FIG. 4 is a front view of the digital gear structure of the present invention;
FIG. 5 is a right-view diagram of a second turntable structure according to the present invention.
In the figure: 1. a platform; 2. a square hole; 3. a knob; 4. a first drive gear; 5. an algorithm gear; 6. an exercise assembly; 7. a rotating assembly; 61. a pull rod; 62. a cross bar; 63. a slider; 64. a chute; 65. a compression spring; 66. a push rod; 67. an annular groove; 68. a cylinder; 71. a digital gear; 72. a second drive gear; 73. a first turntable; 74. a belt; 75. a second turntable; 76. a chute; 77. a support spring; 78. a movable block; 79. and (4) ratchet wheels.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
An embodiment of the teaching apparatus for guiding a child to learn correctly is as follows:
the first embodiment is as follows:
referring to fig. 1-5, a teaching device for guiding children to learn correctly comprises a rotating assembly 7, a digital gear 71 is arranged inside the rotating assembly 7, the digital gears 71 are arranged on the left side and the right side inside a platform 1, the numbers 0 to 9 are uniformly arranged on the front surface of the digital gear 71, the numbers on the top of the front surface of the digital gear are just inside a square hole 2, the diameter of a second driving gear 72 is one fifth of the diameter of the digital gear 71, a second driving gear 72 is meshed and connected with the front surface on the left side of the digital gear 71, a first rotating disc 73 is welded on the left side of the second driving gear 72, a belt 74 is in transmission connection with the top of the first rotating disc 73, a second rotating disc 75 is in transmission connection with the bottom of the belt 74, a chute 76 is arranged inside the second rotating disc 75, a supporting spring 77 is fixedly connected inside the chute 76, a movable block 78 is fixedly connected on one side of the supporting spring 77 far away from the chute 76, the left side of the movable block 78 is riveted inside the inclined groove 76, the left side of the movable block 78 is clamped with the left side inside the inclined groove 76, at least four movable blocks 78 are riveted inside the second rotary disc 75, a ratchet 79 is clamped on the right side of the movable block 78, and the right side of the ratchet 79 is fixedly connected with the left side of the column 68.
Still include podium 1, quad slit 2 has been seted up in the front of podium 1, the front of podium 1 is even is provided with three quad slit 2, the top of podium 1 is provided with knob 3, the bottom welding of knob 3 has first drive gear 4, first drive gear 4's back meshing is connected with algorithm gear 5, first drive gear 4's diameter is the fourth of algorithm gear 5 diameter, algorithm gear 5's positive even addition and subtraction is provided with multiplies and divides four operation symbols, and the operation symbol at its positive top just in time is located the inside of the positive intermediate position quad slit 2 of podium 1, the inside bottom of podium 1 is provided with tempers subassembly 6, the inside of podium 1 is provided with runner assembly 7.
Example two:
please refer to fig. 3-4, a teaching device for guiding children to learn correctly, including exercising assembly 6, the inside of exercising assembly 6 is provided with pull rod 61, the left and right sides of podium 1 all is provided with pull rod 61, the right side welding of pull rod 61 has horizontal pole 62, the right side welding of horizontal pole 62 has slider 63, the outer wall sliding connection of slider 63 has spout 64, the left side fixedly connected with compression spring 65 of spout 64, one side fixed connection that compression spring 65 kept away from spout 64 is at the outer wall of horizontal pole 62, the top welding of horizontal pole 62 has push rod 66, the top sliding connection of push rod 66 has ring channel 67, ring channel 67 has been seted up on the surface of cylinder 68, and ring channel 67 is an end to end ring structure, the outer wall of ring channel 67 is provided with cylinder 68.
Still include podium 1, quad slit 2 has been seted up in the front of podium 1, the front of podium 1 is even is provided with three quad slit 2, the top of podium 1 is provided with knob 3, the bottom welding of knob 3 has first drive gear 4, first drive gear 4's back meshing is connected with algorithm gear 5, first drive gear 4's diameter is the fourth of algorithm gear 5 diameter, algorithm gear 5's positive even addition and subtraction is provided with multiplies and divides four operation symbols, and the operation symbol at its positive top just in time is located the inside of the positive intermediate position quad slit 2 of podium 1, the inside bottom of podium 1 is provided with tempers subassembly 6, the inside of podium 1 is provided with runner assembly 7.
The student makes a round trip to pull rod 61 many times, and the elasticity of compression spring 65 needs to be overcome in the motion of horizontal pole 62 this moment, and the student needs to use certain strength this moment to reach the effect that drives children's taste motion and improve children's body and mind comprehensive development.
The rotary knob 3 of teacher makes a round trip to stimulate pull rod 61 many times about 1 left and right sides student of podium for the inside simple arithmetic problem of forming one of 2 positive three quad slit of podium, it is interactive with the teacher to improve student, thereby has reached and is convenient for arouse children interest, improve children's attention, effectively guides the effect that children correctly studied.
Example three:
referring to fig. 1-5, a teaching device for guiding children to learn correctly comprises a rotating assembly 7, a digital gear 71 is arranged inside the rotating assembly 7, the digital gears 71 are arranged on the left side and the right side inside a platform 1, the numbers 0 to 9 are uniformly arranged on the front surface of the digital gear 71, the numbers on the top of the front surface of the digital gear are just inside a square hole 2, the diameter of a second driving gear 72 is one fifth of the diameter of the digital gear 71, a second driving gear 72 is meshed and connected with the front surface on the left side of the digital gear 71, a first rotating disc 73 is welded on the left side of the second driving gear 72, a belt 74 is in transmission connection with the top of the first rotating disc 73, a second rotating disc 75 is in transmission connection with the bottom of the belt 74, a chute 76 is arranged inside the second rotating disc 75, a supporting spring 77 is fixedly connected inside the chute 76, a movable block 78 is fixedly connected on one side of the supporting spring 77 far away from the chute 76, the left side of the movable block 78 is riveted inside the inclined groove 76, the left side of the movable block 78 is clamped with the left side inside the inclined groove 76, at least four movable blocks 78 are riveted inside the second rotary disc 75, a ratchet 79 is clamped on the right side of the movable block 78, and the right side of the ratchet 79 is fixedly connected with the left side of the column 68.
Still including taking exercise subassembly 6, the inside of taking exercise subassembly 6 is provided with pull rod 61, the left and right sides of podium 1 all is provided with pull rod 61, the right side welding of pull rod 61 has horizontal pole 62, the right side welding of horizontal pole 62 has slider 63, the outer wall sliding connection of slider 63 has spout 64, the left side fixedly connected with compression spring 65 of spout 64, one side fixed connection that spout 64 was kept away from to compression spring 65 is at the outer wall of horizontal pole 62, the top welding of horizontal pole 62 has push rod 66, the top sliding connection of push rod 66 has ring channel 67, ring channel 67 has been seted up on cylinder 68's surface, and ring channel 67 is an end to end's annular structure, the outer wall of ring channel 67 is provided with cylinder 68.
Still include podium 1, quad slit 2 has been seted up in the front of podium 1, the front of podium 1 is even is provided with three quad slit 2, the top of podium 1 is provided with knob 3, the bottom welding of knob 3 has first drive gear 4, first drive gear 4's back meshing is connected with algorithm gear 5, first drive gear 4's diameter is the fourth of algorithm gear 5 diameter, algorithm gear 5's positive even addition and subtraction is provided with multiplies and divides four operation symbols, and the operation symbol at its positive top just in time is located the inside of the positive intermediate position quad slit 2 of podium 1, the inside bottom of podium 1 is provided with tempers subassembly 6, the inside of podium 1 is provided with runner assembly 7.
The student makes a round trip to pull rod 61 many times, and the elasticity of compression spring 65 needs to be overcome in the motion of horizontal pole 62 this moment, and the student needs to use certain strength this moment to reach the effect that drives children's taste motion and improve children's body and mind comprehensive development.
The rotary knob 3 of teacher makes a round trip to stimulate pull rod 61 many times about 1 left and right sides student of podium for the inside simple arithmetic problem of forming one of 2 positive three quad slit of podium, it is interactive with the teacher to improve student, thereby has reached and is convenient for arouse children interest, improve children's attention, effectively guides the effect that children correctly studied.
Detailed description referring to fig. 1, in use, two students are respectively positioned at the left and right sides of the platform 1, and at the time, the two students respectively pull the pull rod 61 for multiple times, and simultaneously, the teacher rotates the knob 3.
Referring to fig. 3 in detail, when the teacher rotates the knob 3, because the first driving gear 4 is welded on the bottom of the knob 3, so that the first driving gear 4 can rotate at the moment, and because the back of the first driving gear 4 is meshed with the algorithm gear 5, so that the algorithm gear 5 can also rotate at this time, and because the diameter of the first driving gear 4 is one fourth of the diameter of the algorithm gear 5, therefore, when the teacher rotates the knob 3 for one circle, the algorithm gear 5 will rotate by one fourth, and because the front of the algorithm gear 5 is uniformly provided with four operation symbols for addition, subtraction, multiplication and division, and the operation symbol on the top of the front surface is just positioned inside the square hole 2 in the middle of the front surface of the platform 1, therefore, the four operation symbols of addition, subtraction, multiplication and division can be respectively arranged in the square hole 2 at the middle position of the front surface of the platform 1, and students in the classroom can see the operation symbols in the square hole 2 at the middle position of the front surface of the platform 1.
When the left side student made a round trip to stimulate pull rod 61 many times, because the right side welding of pull rod 61 has horizontal pole 62, so horizontal pole 62 also can move left this moment, again because the left side fixedly connected with compression spring 65 of spout 64, one side fixed connection that spout 64 was kept away from to compression spring 65 is at the outer wall of horizontal pole 62, so compression spring 65's elasticity need be overcome in horizontal pole 62's the motion this moment, the student need use certain strength this moment, thereby reached the effect that drives children's taste motion and improve children's body and mind comprehensive development.
Because the right side of horizontal pole 62 has welded slider 63 again, the outer wall sliding connection of slider 63 has spout 64, so slider 63 can slide in the inside of spout 64 left and right this moment, and because the top welding of horizontal pole 62 has push rod 66, so push rod 66 also can periodic side to side movement this moment, because the top sliding connection of push rod 66 has ring channel 67 again, ring channel 67 has been seted up on the surface of cylinder 68, and ring channel 67 is an end to end's annular structure, so cylinder 68 can periodically make a round trip to rotate the semicircle this moment.
As shown in detail in fig. 5, the right side of the ratchet wheel 79 is fixedly connected with the left side of the cylinder 68, so that the ratchet wheel 79 can periodically rotate for a half turn, the second rotary plate 75 is provided with an inclined groove 76, the inclined groove 76 is fixedly connected with a supporting spring 77, one side of the supporting spring 77, which is far away from the inclined groove 76, is fixedly connected with a movable block 78, the left side of the movable block 78 is riveted inside the inclined groove 76, the left side of the movable block 78 is clamped with the left side of the inclined groove 76, the second rotary plate 75 is riveted with at least four movable blocks 78, and the ratchet wheel 79 is clamped on the right side of the movable block 78, so that the second rotary plate 75 can intermittently rotate for a half turn, and when the pull rod 61 is pulled once left and right, the second rotary plate 75 rotates for a half turn.
Because the top of the first rotating disc 73 is connected with the belt 74 in a transmission manner, and the inner part of the bottom of the belt 74 is connected with the second rotating disc 75 in a transmission manner, at this time, the second rotating disc 75 can also intermittently rotate for a half circle, because the front surface of the left side of the digital gear 71 is connected with the second driving gear 72 in a meshing manner, and the left side of the second driving gear 72 is welded with the first rotating disc 73, at this time, the digital gear 71 can also intermittently rotate, because the diameter of the second driving gear 72 is one fifth of the diameter of the digital gear 71, at this time, when the first rotating disc 73 rotates for a half circle, the digital gear 71 rotates for one tenth, namely, the pull rod 61 is pulled back and forth once, the digital gear 71 rotates for one tenth, and because the front surface of the digital gear 71 is uniformly provided with numbers from 0 to 9, and the number at the top of the front surface is just positioned inside the square hole 2, at this time, the number at the front surface of the digital gear 71 is always positioned inside the square hole 2, the device accuracy is high, the unclear problem of digital display can not appear, and when the student on podium 1 right side pulled the pull rod 61 on the same reason, digital gear 71 on right side also can rotate, and podium 1 positive three quad slit 2 inside can form a simple arithmetic problem this moment to reached be convenient for arouse children interest, improve children's attention, effectively guide the effect that children correctly learned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. Teaching equipment for guiding correct learning of children, comprising a rotating assembly (7), characterized in that: the inside of runner assembly (7) is provided with digital gear (71), the left front meshing of digital gear (71) is connected with second drive gear (72), the left side welding of second drive gear (72) has first carousel (73), the top transmission of first carousel (73) is connected with belt (74), the internal transmission of belt (74) bottom is connected with second carousel (75), chute (76) have been seted up to the inside of second carousel (75), the inside fixedly connected with supporting spring (77) of chute (76), one side fixedly connected with movable block (78) of chute (76) are kept away from to supporting spring (77), the right side joint of movable block (78) has ratchet (79).
2. An educational apparatus for guiding proper learning of a child in accordance with claim 1, wherein: still including taking exercise subassembly (6), the inside of taking exercise subassembly (6) is provided with pull rod (61), the right side welding of pull rod (61) has horizontal pole (62), the right side welding of horizontal pole (62) has slider (63), the outer wall sliding connection of slider (63) has spout (64), the left side fixedly connected with compression spring (65) of spout (64), the top welding of horizontal pole (62) has push rod (66), the top sliding connection of push rod (66) has ring channel (67), the outer wall of ring channel (67) is provided with cylinder (68).
3. An educational apparatus for guiding proper learning of a child in accordance with claim 1, wherein: still include podium (1), quad slit (2) have been seted up in the front of podium (1), the top of podium (1) is provided with knob (3), the bottom welding of knob (3) has first drive gear (4), the back meshing of first drive gear (4) is connected with algorithm gear (5), the inside bottom of podium (1) is provided with tempers subassembly (6), the inside of podium (1) is provided with runner assembly (7).
4. An educational apparatus for guiding proper learning of a child according to claim 2, wherein: the right side of the ratchet wheel (79) is fixedly connected with the left side of the column (68).
5. An educational apparatus for guiding proper learning of a child in accordance with claim 1, wherein: the left side riveting of movable block (78) is in the inside of chute (76), and the left side of movable block (78) and the inside left side joint of chute (76), the inside riveting of second carousel (75) is no less than four movable blocks (78).
6. An educational device for guiding proper learning of a child according to claim 1 or 3, wherein: the left and right sides of podium (1) inside all is provided with digital gear (71), the positive even number that is provided with 0 to 9 of digital gear (71), and the number at its positive top is just in the inside of quad slit (2), the diameter of second drive gear (72) is one fifth of digital gear (71) diameter.
7. An educational apparatus for guiding proper learning of a child according to claim 2, wherein: the surface of the cylinder (68) is provided with an annular groove (67), and the annular groove (67) is of an end-to-end annular structure.
8. An educational apparatus for guiding proper learning of a child according to claim 2, wherein: one side of the compression spring (65) far away from the sliding groove (64) is fixedly connected to the outer wall of the cross rod (62).
9. A teaching device for guiding proper learning of children according to claim 3, wherein: the left and right sides of podium (1) all is provided with pull rod (61), the front of podium (1) is even is provided with three quad slit (2).
10. A teaching device for guiding proper learning of children according to claim 3, wherein: the diameter of the first driving gear (4) is one fourth of the diameter of the algorithm gear (5), the four operation symbols of addition, subtraction, multiplication and division are uniformly arranged on the front surface of the algorithm gear (5), and the operation symbol on the top of the front surface of the algorithm gear is just positioned in the square hole (2) in the middle of the front surface of the platform (1).
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| CN202110867321.1A CN113593370A (en) | 2021-07-30 | 2021-07-30 | Teaching equipment for guiding children to correctly learn |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115311859A (en) * | 2022-08-06 | 2022-11-08 | 河南省科学院地理研究所 | Display device for urban road vehicle congestion condition |
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| CN108877412A (en) * | 2018-06-28 | 2018-11-23 | 沈金秀 | A kind of primary multiplication of mathematical education is set a question device |
| CN209879876U (en) * | 2019-04-22 | 2019-12-31 | 陆天龙 | Infant mathematics teaching board |
| CN110803458A (en) * | 2019-11-20 | 2020-02-18 | 新昌县韵母电子有限公司 | Square material intelligent counter |
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| CN212570058U (en) * | 2020-07-15 | 2021-02-19 | 吕秀芹 | Digital character wheel teaching device for primary school mathematics |
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| CN115311859A (en) * | 2022-08-06 | 2022-11-08 | 河南省科学院地理研究所 | Display device for urban road vehicle congestion condition |
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Application publication date: 20211102 |