CN113733785A

CN113733785A - Circle drawing teaching board convenient for changing diameter and circle center for mathematical teaching

Info

Publication number: CN113733785A
Application number: CN202111213359.3A
Authority: CN
Inventors: 蒋俊杰; 高德军; 陈黎明
Original assignee: Jiaqiao Town Middle School Taoyuan County
Current assignee: Jiaqiao Town Middle School Taoyuan County
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2021-12-03

Abstract

The invention discloses a circle drawing teaching board convenient for changing the diameter and the circle center for mathematical teaching, which comprises a supporting leg, a fixed rod, a supplement board and a plane board, wherein a clamping shaft is arranged on the inner side of the supporting leg, the fixed rod is positioned on the rear side of a writing board and penetrates through the inside of a sliding block, the supplement board is positioned on the left side of a clamping column, a connecting shaft is arranged in the middle of a volute spring, an outlet is formed in the outer side surface of an adjuster, a chalk groove is connected to the bottom of a connecting rope, and the plane board and the clamping column are symmetrically arranged about the central vertical line of a sleeve. This mathematics teaching is with drawing circle teaching board convenient to change diameter and centre of a circle, scroll spring, connecting axle, carousel and the use of connecting the rope make operating personnel when drawing circularly, the rope is connected in the pulling to the scale mark on observation connection rope surface, thereby learn the circular shape diameter of drawing, will connect the rope again and fix, use the regulator as the axle center, rotatory chalk groove, just draw circularly.

Description

Circle drawing teaching board convenient for changing diameter and circle center for mathematical teaching

Technical Field

The invention relates to the technical field of mathematical teaching, in particular to a circle drawing teaching board convenient for changing the diameter and the circle center for mathematical teaching.

Background

Mathematics is a subject for researching the concepts of quantity, structure, change, space, information and the like, and is one of the most important subjects in China, in the teaching of the mathematics, geometric figures are often needed to be used, and the geometric figures need to be drawn, a circle is the most important one of the geometric figures, and in the drawing of the circle, the circle is often difficult, so that the circle drawing teaching board convenient for changing the diameter and the circle center for the teaching of the mathematics becomes more important.

In current teaching board, can only be single write the teaching content, the performance is comparatively single, can't provide corresponding help when mr need draw circularly to lead to self practicality relatively poor, be unfavorable for large-scale use.

Disclosure of Invention

The invention aims to provide a circle drawing teaching board convenient for changing the diameter and the circle center for mathematical teaching, and aims to solve the problems that the prior teaching board can only write teaching contents singly, has single performance, cannot provide corresponding help when a teacher needs to draw a circle, and is not beneficial to large-scale use.

In order to achieve the purpose, the invention provides the following technical scheme that the circle drawing teaching board convenient for changing the diameter and the circle center for mathematical teaching comprises a supporting leg, a fixed rod, a supplement board and a panel, wherein a clamping shaft is arranged on the inner side of the supporting leg, a fixed frame is arranged at the top of the supporting leg, a writing board is connected to the middle upper part of the fixed frame, an opening is formed in the middle of the writing board, the fixed rod is positioned on the rear side of the writing board and penetrates through the inside of a sliding block, the sliding block is connected with a clamping column through a sleeve, the supplement board is positioned on the left side of the clamping column, an adjuster is arranged on the left side of the supplement board, a volute spiral spring is connected to the lower side of the inside of the adjuster, a connecting shaft is arranged in the middle of the volute spiral spring and penetrates through the inside of a rotary disc, a connecting rope is arranged on the upper part of the rotary disc, an outlet is formed in the outer side surface of the adjuster, and the outside of export is connected with the cardboard, the bottom of connecting the rope is connected with the chalk groove, the plane board is the symmetry setting with the card post about telescopic central vertical line.

Preferably, the clamping column and the writing board form a rotating structure through the sleeve, the clamping column and the fixing rod form a sliding structure through the sliding block, and the cross section of the clamping column is the same as that of the opening.

Preferably, the middle part of carousel and connection rope interconnect, and connect the rope and pass through the carousel and constitute the pull structure.

Compared with the prior art, the invention has the beneficial effects that: the circle drawing teaching board for the mathematics teaching is convenient for changing the diameter and the circle center,

1. the supporting legs, the clamping shafts and the fixing frame are used, so that an operator can adjust the position of the writing board of the device according to the height of the operator, the operator can use the device more conveniently, students can observe the written content conveniently, and the practicability of the device is improved;

2. the fixed rod, the sliding block and the sleeve are used, so that an operator can draw a circle according to the requirement of the operator, whether the regulator is used is selected, and when the regulator is not used, the clamp column or the plane plate can be rotated through rotation of the sleeve, so that the clamp column or the plane plate can be connected with the opening hole, and the working efficiency of the device is improved;

3. the use of scroll spring, connecting axle, carousel and connection rope makes operating personnel when drawing circularly, puts into the inside in chalk groove with the chalk, and later the pulling is connected the rope to the scale mark on observing the connection rope surface, thereby learn the circular shape diameter of drawing, will connect the rope again and fix, use the regulator as the axle center, rotatory chalk groove, just draw circularly.

Drawings

FIG. 1 is a schematic diagram of a right-view structure of the present invention in partial section;

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

fig. 3 is a schematic view of the internal structure of the regulator of the present invention.

In the figure: 1. supporting legs; 2. clamping a shaft; 3. a fixed mount; 4. a writing board; 5. opening a hole; 6. fixing the rod; 7. a slider; 8. a sleeve; 9. clamping the column; 10. a supplement board; 11. a regulator; 12. a volute spiral spring; 13. a connecting shaft; 14. a turntable; 15. connecting ropes; 16. an outlet; 17. clamping a plate; 18. a chalk groove; 19. a flat plate.

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.

Referring to fig. 1-3, the present invention provides a technical solution: a circle drawing teaching board convenient for changing the diameter and the circle center for mathematical teaching comprises a supporting leg 1, a clamping shaft 2, a fixing frame 3, a writing board 4, an opening 5, a fixing rod 6, a sliding block 7, a sleeve 8, a clamping column 9, a supplement board 10, an adjuster 11, a volute spiral spring 12, a connecting shaft 13, a rotary disc 14, a connecting rope 15, an outlet 16, a clamping board 17, a chalk groove 18 and a flat panel 19, wherein the clamping shaft 2 is installed on the inner side of the supporting leg 1, the fixing frame 3 is arranged at the top of the supporting leg 1, the writing board 4 is connected with the middle upper part of the fixing frame 3, the opening 5 is formed in the middle of the writing board 4, the fixing rod 6 is located at the rear side of the writing board 4, the fixing rod 6 penetrates through the inside of the sliding block 7, the sliding block 7 is mutually connected with the clamping column 9 through the sleeve 8, the clamping column 9 forms a rotating structure with the writing board 4 through the sliding block 7 and the fixing rod 6, the section shape of the clamping column 9 is the same as that of the opening 5, so that an operator can select whether to use the regulator 11 according to the requirement of the operator, and the regulator 11 can be retracted to the inner side of the writing board 4 when not in use, so as to avoid influencing the use of the writing board 4, the supplementing board 10 is positioned at the left side of the clamping column 9, the regulator 11 is installed at the left side of the supplementing board 10, a scroll spring 12 is connected to the lower side of the inside of the regulator 11, a connecting shaft 13 is installed at the middle part of the scroll spring 12, the connecting shaft 13 penetrates through the inside of the rotating disc 14, a connecting rope 15 is arranged at the upper part of the rotating disc 14, the middle part of the rotating disc 14 is connected with the connecting rope 15, the connecting rope 15 forms a drawing structure through the rotating disc 14, so that the device can adjust the distance between the chalk groove 18 and the regulator 11 by drawing the connecting rope 15, and make the circular diameter of drawing adjust, improved the device's practicality, export 16 has been seted up on the outside surface of regulator 11, and the outside of export 16 is connected with cardboard 17, and the bottom of connecting rope 15 is connected with chalk groove 18, and flat panel 19 is the symmetry setting with card post 9 about the central vertical line of sleeve 8.

The working principle is as follows: when the circle drawing teaching board convenient for changing the diameter and the circle center for mathematical education is used, firstly, whether the device is intact or not is determined, then the device can be normally used, the device is placed at a proper position, then, the height of the supporting leg 1 is adjusted according to the clamping shaft 2, so that the writing board 4 can be suitable for the height of a teacher, then, when a circle needs to be drawn, the sleeve 8 is rotated, the adjuster 11 faces the direction of the writing board 4, as shown in figure 1, the sliding block 7 slides towards the left side, so that the supplementary board 10 is driven to slide towards the left side, then the supplementary board 10 enters the inside of the opening 5, when the left side surface of the supplementary board 10 and the left side surface of the writing board 4 are in the same plane, the sliding block 7 is fixed through the fixing screw on the outer side of the sliding block 7, so that the supplementary board 10 is fixed, and then, chalk is placed in the chalk groove 18, the chalk groove 18 is pulled, so that the connecting rope 15 is pulled, the length of the connecting rope 15 is longer and longer, the connecting rope 15 drives the rotary disc 14 to rotate, the rotary disc 14 rotates to drive the lower scroll spring 12 to slowly tighten, the length of the connecting rope 15 is observed through the scale marks on the surface of the connecting rope 15, when the ideal length is reached, the clamping plate 17 rotates to press the clamping plate 17 to be covered on the outer side of the outlet 16, the clamping plate 17 is fixed through the button screws on the outer side of the clamping plate 17, the connecting rope 15 can be fixed, then the connecting rope 15 is straightened, the chalk groove 18 rotates, the supplementary plate 10 is rotated, the phenomenon that the connecting rope 15 is wound is avoided, the round shape is drawn, the clamping plate 17 is opened, the connecting rope 15 is retracted into the regulator 11 under the action of the scroll spring 12, and the next use of an operator is facilitated, when it is not necessary to draw a circle, the slider 7 is slid outward, and then the sleeve 8 is rotated so that the flat plate 19 faces the writing board 4, and then the flat plate 19 is placed inside the opening 5 according to the same procedure so that the operator can write on the outer surface of the writing board 4, which is not described in detail in this specification, but is known to those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a mathematics teaching is with drawing circle teaching board convenient to change diameter and centre of a circle, includes supporting leg (1), dead lever (6), supplementary board (10) and planum board (19), its characterized in that: the multifunctional writing board is characterized in that a clamping shaft (2) is installed on the inner side of the supporting leg (1), a fixing frame (3) is arranged at the top of the supporting leg (1), a writing board (4) is connected to the middle upper portion of the fixing frame (3), a hole (5) is formed in the middle of the writing board (4), the fixing rod (6) is located on the rear side of the writing board (4), the fixing rod (6) penetrates through the inside of the sliding block (7), the sliding block (7) is connected with the clamping column (9) through a sleeve (8), the supplementing plate (10) is located on the left side of the clamping column (9), an adjuster (11) is installed on the left side of the supplementing plate (10), a volute spiral spring (12) is connected to the lower side of the adjuster (11), a connecting shaft (13) is installed in the middle of the volute spiral spring (12), the connecting shaft (13) penetrates through the inside of the rotary table (14), and a connecting rope (15) is arranged on the upper portion of the rotary table (14), export (16) have been seted up to the outside surface of regulator (11), and the outside of export (16) is connected with cardboard (17), the bottom of connecting rope (15) is connected with chalk groove (18), plane board (19) are the symmetry setting with card post (9) about the central perpendicular line of sleeve (8).

2. A circle drawing teaching board convenient for changing the diameter and the center of a circle for mathematical education as claimed in claim 1, wherein: the clamping column (9) and the writing board (4) form a rotating structure through the sleeve (8), the clamping column (9) and the fixing rod (6) form a sliding structure through the sliding block (7), and the section shape of the clamping column (9) is the same as that of the opening (5).

3. A circle drawing teaching board convenient for changing the diameter and the center of a circle for mathematical education as claimed in claim 1, wherein: the middle part of carousel (14) and connection rope (15) interconnect, and connect rope (15) and pass through carousel (14) and constitute the pull structure.