Portable drawing auxiliary device for mathematics teaching

Abstract

The invention discloses a portable drawing auxiliary device for mathematics teaching, and relates to the field of teaching drawing, the portable drawing auxiliary device comprises a drawing board, an extension board is arranged on the right side of the drawing board, identification lines are arranged on the front side of the drawing board and the front side of the extension board, the drawing size is identified, a movable cylinder penetrates through the left end of the drawing board, and the movable cylinder is arranged on the right side of the drawing board. The drawing board is provided with a movable cylinder, the movable cylinder is rotatably connected with the drawing board, an adsorption cavity is formed in the rear side of the movable cylinder, an adsorption control mechanism is arranged on the front side of the adsorption cavity, the movable cylinder is adsorbed to a drawing surface, sliding grooves are formed in the drawing board and the extension board, and the sliding groove in the extension board is communicated with the sliding groove in the drawing board. According to the portable drawing auxiliary device for mathematics teaching, circle drawing can be achieved through rotation of the drawing board around the movable cylinder, the drawing board can also be directly used as a ruler for line segment drawing, two drawing modes can be achieved through one tool, multiple tools do not need to be carried, and using is more flexible and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of teaching drawing, in particular to a portable drawing auxiliary device for mathematics teaching. Background Art

[0002] In mathematics teaching, for problems such as geometry, auxiliary drawing is generally used for explanation. When drawing figures, drawing can be done with the help of drawing auxiliary devices. However, when drawing figures, different tools are needed for drawing straight lines and circles with current drawing auxiliary devices. When drawing circles, it is inconvenient to install chalk and brushes, and the tool stability is poor during drawing. In response to the problem of drawing, prior art 1 (application number CN202023112626.1, a Chinese patent published on September 14, 2021) is a drawing auxiliary device for mathematics teaching, which solves the problem that the existing compass in the prior art needs to be inserted with chalk or a paintbrush during use, but the existing clamping parts have poor clamping effect, and the chalk or paintbrush is easy to fall off during use, which is troublesome to use and wastes teaching time; prior art 2 (application number CN202020345207.3, published on December 1, 2020) is an auxiliary drawing teaching aid for mathematics teaching, including: a compass head, the compass head is fixedly connected to a compass neck, The bottom of the compass head is threadedly fixed to the top of the compass neck, a rotating shaft is fixed inside the compass neck, the rotating shaft is rotatably connected to a positioning foot, the rotating shaft is located on the positioning foot and is movably connected to a drawing foot, one end of the positioning foot is movably mounted on the rotating shaft, the other end of the positioning foot is fixedly connected to a steel needle pin, one end of the drawing foot is movably mounted on the rotating shaft, and a pin clamp device is fixedly mounted on the outer side of the other end of the drawing foot; the pin clamp device also includes a sleeve, and arc plates are symmetrically arranged inside the sleeve. The present invention is an auxiliary drawing teaching aid for mathematics teaching, which is simple and convenient to use, has a simple structure, and can quickly expand the inner diameter of the clamp to allow a brush or chalk to be placed in it; When current drawing devices draw a circle, the drawing fulcrum slides and fits on the smooth drawing surface. The center point of the circle is prone to slip during the drawing process, which affects the drawing effect. In addition, different drawing tools are required to draw circles and line segments, resulting in the need to carry more tools for drawing, which reduces its overall ease of use. Summary of the invention

[0003] The purpose of the present invention is to provide a portable drawing auxiliary device for mathematics teaching, so as to solve the problem proposed in the above background technology that the drawing fulcrum of the current drawing device slides and fits on the smooth drawing surface, the center point of the circle is easy to slip during the drawing process, and different drawing tools are needed to draw circles and line segments, resulting in the need to carry more tools for drawing.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable drawing auxiliary device for mathematics teaching, comprising a drawing board, an extension board is arranged on the right side of the drawing board, and marking lines are arranged on the front side of the drawing board and the front side of the extension board to mark the drawing size, a movable cylinder is passed through the left end of the drawing board, and the movable cylinder and the drawing board are rotatably connected, and an adsorption cavity is arranged on the rear side of the movable cylinder, and an adsorption control mechanism is arranged on the front side of the adsorption cavity to adsorb the movable cylinder on the drawing surface, and a slide groove is arranged inside the drawing board and the extension board, and the slide groove in the extension board and the slide groove in the drawing board are connected to each other. The slide grooves are connected to each other, and a slider is arranged inside the slide groove. A left-right sliding structure is formed between the slider and the slide groove, and a through hole is opened in the middle of the slider, through which positioning is provided for drawing lines. A fixed block is fixed on the right side of the slider, and a sliding limit mechanism is arranged inside the fixed block to limit the sliding of the slider in the slide groove. A rotating connection mechanism is arranged between the extension plate and the drawing board. The extension plate can be rotated to a position parallel to the drawing board through the rotating connection mechanism, and the extension plate can be folded up. A positioning mechanism is arranged on the outside of the extension plate to position the extension plate before and after rotation to keep it stable.

[0005] To further optimize the technical solution, the surface of the movable cylinder is evenly installed with first balls, and the surface of the movable cylinder is fixed with a baffle, and the baffle is located at the front and rear sides of the drawing board to provide positioning for the movable cylinder.

[0006] To further optimize the technical solution, a rubber pad is fixed to the rear side of the movable cylinder, and the rubber pad is designed in a circular ring structure, and the interior of the rubber pad and the adsorption chamber are connected to each other.

[0007] To further optimize the technical solution, auxiliary blocks are fixed to the right rear of the drawing board and the right rear of the extension board, and a second ball bearing is installed on the rear side of the auxiliary block, and the rear side of the auxiliary block is flush with the rear side of the movable cylinder.

[0008] To further optimize the technical solution, the adsorption control mechanism includes a movable plug, a control rod and a first spring; A movable plug is arranged inside the adsorption chamber and between the adsorption chambers to form a forward and backward sliding structure; A control rod is fixed to the front side of the movable plug, and the front end of the control rod penetrates the front side surface of the movable cylinder; The first spring is arranged on the outer side of the control rod, and the rear end of the first spring is connected to the movable cylinder to provide a forward thrust for the control rod.

[0009] To further optimize the technical solution, the sliding limit mechanism includes a limit block, a second spring, a top block, a third spring and a push rod; The limit block is arranged inside the fixed block and between the fixed blocks to form an up and down sliding structure; A second spring is arranged on the outer side of the limit block to provide a thrust for the limit block to move inwards; The top block is arranged at the inner end of the limit block, and the surface of the top block is designed to be inclined, and a left-right sliding structure is formed between the top block and the fixed block; A third spring is arranged on the left side of the top block to provide a right thrust for the top block, and the elastic force of the third spring is greater than the elastic force of the second spring; A push rod is fixed on the right side of the top block, and the right end of the push rod penetrates the right side of the fixed block to control the movement of the top block.

[0010] To further optimize the technical solution, the side cross-section of the slider is designed to be an "H"-shaped structure, and third balls are provided on both the upper and lower sides of the slider to assist the sliding of the slider.

[0011] To further optimize the technical solution, the rotary connection mechanism includes a connection block, a movable shaft and a support frame; A connecting block is fixed on the front side of the extension plate; A movable shaft, fixed to the front side of the connecting block; The support frame is fixed on the front side of the drawing board, and a rotation connection is formed between the movable shaft and the support frame.

[0012] To further optimize the technical solution, the positioning mechanism includes a first adsorption magnet and a second adsorption magnet; The first adsorption magnets are respectively arranged on the right side of the drawing board and the left side of the extension board, and the first adsorption magnets on the drawing board and the first adsorption magnets on the extension board attract each other; The second adsorption magnets are respectively arranged below the extension board and below the drawing board, and the two groups of second adsorption magnets attract each other when facing each other.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The drawing board can be rotated around the movable cylinder to draw a circle, and the drawing board can also be used as a ruler to draw line segments. One tool can realize two drawing methods, without carrying multiple tools, and the use is more flexible and convenient; The movement of the movable plug in the movable cylinder can generate an adsorption force in the adsorption chamber, so that the movable cylinder can be adsorbed on the drawing surface, such as a blackboard, so that the center of the drawing board can remain stable when the drawing board is rotated later, thereby ensuring the stability of circular drawing; Chalk or other drawing tools can be placed through the opening in the slider, and then the drawing board can be moved to draw. The chalk can be directly plugged in and out for easy operation, and the slider can slide in the slide groove to adjust the diameter of the drawing circle; The drawing size of the drawing can be lengthened by setting the extension board, and the extension board can be rotated to the side of the drawing board for storage, so that the overall length of the device is shortened, making it convenient to carry and store the device; The extension plate can be rotated and stored through the movable shaft, and the mutual attraction effect of the first adsorption magnet and the second adsorption magnet can position the extension plate when it is rotated out and stored, so that the device can maintain its own stability when it is carried or used. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the folding structure of the extension board of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the movable cylinder of the present invention; Figure 5 It is a schematic diagram of the side section structure of the movable cylinder of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the slider of the present invention; Figure 7 This is a schematic diagram of the main cross-sectional structure of the fixing block of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the support frame of the present invention.

[0015] In the figure: 1. drawing board; 2. extension board; 3. marking line; 4. movable cylinder; 5. baffle; 6. first ball; 7. rubber pad; 8. adsorption chamber; 9. movable plug; 10. control rod; 11. first spring; 12. auxiliary block; 13. second ball; 14. slider; 15. through port; 16. slide groove; 17. fixed block; 18. limit block; 19. second spring; 20. top block; 21. third spring; 22. push rod; 23. third ball; 24. connecting block; 25. movable shaft; 26. support frame; 27. first adsorption magnet; 28. second adsorption magnet. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 8 , the present invention provides the following technical solutions: a portable drawing auxiliary device for mathematics teaching, comprising a drawing board 1; Example 1

[0018] The invention provides a technical solution, which discloses that an extension plate 2 is arranged on the right side of a drawing board 1, and marking lines 3 are arranged on the front sides of the drawing board 1 and the extension plate 2 to mark the drawing size, a movable cylinder 4 is passed through the left end of the drawing board 1, and the movable cylinder 4 and the drawing board 1 are rotatably connected, and an adsorption chamber 8 is opened on the rear side of the movable cylinder 4, and an adsorption control mechanism is arranged on the front side of the adsorption chamber 8 to adsorb the movable cylinder 4 on the drawing surface, and a slide groove 16 is opened inside the drawing board 1 and the extension plate 2, and the slide groove 16 in the extension plate 2 and the slide groove 16 in the drawing board 1 are connected to each other, and the inside of the slide groove 16 A slider 14 is provided, and a left-right sliding structure is formed between the slider 14 and the slide groove 16, and a through hole 15 is opened in the middle of the slider 14, through which a position is provided for drawing lines, a fixed block 17 is fixed on the right side of the slider 14, and a sliding limit mechanism is provided inside the fixed block 17 to limit the sliding of the slider 14 in the slide groove 16, a rotating connection mechanism is provided between the extension board 2 and the drawing board 1, and the extension board 2 can be rotated to a position parallel to the drawing board 1 through the rotating connection mechanism, and the extension board 2 is folded, and a positioning mechanism is provided on the outer side of the extension board 2 to position the extension board 2 before and after the rotation to keep it stable; When in use, the adsorption control mechanism can be used to make the adsorption chamber 8 generate an adsorption force, so that the movable cylinder 4 is adsorbed on the drawing surface, providing one end positioning for the drawing board 1. At this time, the drawing board 1 can be held by hand to draw a straight line directly on the drawing board 1. If a circle needs to be drawn, the chalk or drawing pen can be inserted into the through opening 15 to make it contact with the drawing surface, and then the drawing board 1 is rotated to make the chalk rotate around the movable cylinder 4 to achieve the drawing of the circle, and the slider 14 can be moved in the slide groove 16 to adjust the diameter of the drawn circle so as to draw different sizes. Example 2

[0019] On the basis of the first embodiment, the present invention discloses that the surface of the movable cylinder 4 is evenly installed with the first ball 6, and the surface of the movable cylinder 4 is fixed with a baffle 5, and the baffle 5 is located at the front and rear sides of the drawing board 1 to provide positioning for the movable cylinder 4, a rubber pad 7 is fixed to the rear side of the movable cylinder 4, and the rubber pad 7 is designed in a circular ring structure, and the interior of the rubber pad 7 and the adsorption chamber 8 are connected to each other, an auxiliary block 12 is fixed to the right rear side of the drawing board 1 and the right rear side of the extension plate 2, and a second ball 13 is installed on the rear side of the auxiliary block 12, and the rear side of the auxiliary block 12 is flush with the rear side of the movable cylinder 4, the adsorption control mechanism includes a movable plug 9, a control rod 10 and a first spring 11, the movable plug 9 is arranged inside the adsorption chamber 8 and between the adsorption chamber 8 to form a front and rear sliding structure, the control rod 10 is fixed to the front side of the movable plug 9, and the front end of the control rod 10 passes through the front surface of the movable cylinder 4, the first spring 11 is arranged on the outside of the control rod 10, and the rear end of the first spring 11 is aligned with the movable cylinder 4 The control rod 10 is connected to provide a forward thrust, and the sliding limit mechanism includes a limit block 18, a second spring 19, a top block 20, a third spring 21 and a push rod 22. The limit block 18 is arranged inside and between the fixed block 17 to form an up and down sliding structure. The second spring 19 is arranged on the outside of the limit block 18 to provide a thrust for the limit block 18 to move inward. The top block 20 is arranged at the inner end of the limit block 18, and the surface of the top block 20 is designed in an inclined structure, and the top block 21 is provided with a plurality of springs 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 111, 112, 113 A left-right sliding structure is formed between the top block 20 and the fixed block 17. The third spring 21 is arranged on the left side of the top block 20 to provide a right thrust for the top block 20, and the elastic force of the third spring 21 is greater than the elastic force of the second spring 19. The push rod 22 is fixed on the right side of the top block 20, and the right end of the push rod 22 passes through the right side of the fixed block 17 to control the movement of the top block 20. The side view cross section of the slider 14 is designed in an "H" shape, and the upper and lower sides of the slider 14 are provided with third balls 23 to assist the sliding of the slider 14. When the movable cylinder 4 is adsorbed, the control rod 10 can be pressed to push the movable plug 9 to move backward, and then the rubber pad 7 on the rear side of the movable cylinder 4 is fitted with the drawing surface, and the control rod 10 is released. The first spring 11 will push the control rod 10 to move forward, so that the control rod 10 drives the movable plug 9 to move, and the movable plug 9 moves in the adsorption chamber 8 to generate an adsorption force in the adsorption chamber 8, so that the movable cylinder 4 is adsorbed and positioned, and then the drawing board 1 can be rotated for use. When the position of the slider 14 needs to be adjusted, the push rod 22 can be pressed to push the push rod 22 to move the movable cylinder 4. The movable top block 20 moves to release the squeezing of the top block 20 on the limit block 18, and the second spring 19 pushes the limit block 18 to move, releasing the contact between the limit block 18 and the inner wall of the slide groove 16, so that the slider 14 becomes slidable, and then the slider 14 can be moved to adjust the drawing size. After the adjustment is completed, the push rod 22 is released, and the top block 20 moves again under the action of the third spring 21 to squeeze the limit block 18, so that the limit block 18 contacts the inner wall of the slide groove 16, and the sliding of the slider 14 is limited, so that it remains stable during subsequent drawing. Example 3

[0020] On the basis of the first embodiment, a rotary connection mechanism is disclosed, which includes a connection block 24, a movable shaft 25 and a support frame 26. The connection block 24 is fixed to the front side of the extension plate 2, the movable shaft 25 is fixed to the front side of the connection block 24, and the support frame 26 is fixed to the front side of the drawing board 1. The movable shaft 25 and the support frame 26 form a rotary connection. The positioning mechanism includes a first adsorption magnet 27 and a second adsorption magnet 28. The first adsorption magnet 27 is respectively arranged on the right side of the drawing board 1 and the left side of the extension plate 2, and the first adsorption magnet 27 on the drawing board 1 and the first adsorption magnet 27 on the extension plate 2 attract each other. The second adsorption magnet 28 is respectively arranged below the extension plate 2 and below the drawing board 1, and the two groups of second adsorption magnets 28 attract each other when facing each other. The extension board 2 can be spliced ​​with the drawing board 1 according to the needs of use to extend the overall length of the drawing board 1. It can also be folded and stored when it is not needed, which is convenient for carrying and storing the device. When it is necessary to connect the long board 2 for use, the extension board 2 can be rotated so that it can be rotated around the center of the movable shaft 25 through the connecting block 24 and the movable shaft 25, and the extension board 2 and the drawing board 1 are placed opposite each other. At the same time, the first adsorption magnets 27 on the drawing board 1 and the extension board 2 attract each other, providing a positioning effect for the connection of the long board 2. After the extension board 2 is rotated and stored, the second adsorption magnets 28 on the drawing board 1 and the extension board 2 attract each other to provide positioning for them.

[0021] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable drawing auxiliary device for mathematics teaching, comprising a drawing board (1); Features: An extension plate (2) is arranged on the right side of the drawing board (1), and marking lines (3) are arranged on the front sides of the drawing board (1) and the extension plate (2) for marking the drawing size. A movable cylinder (4) is passed through the left end of the drawing board (1), and the movable cylinder (4) and the drawing board (1) are rotatably connected. An adsorption chamber (8) is arranged on the rear side of the movable cylinder (4), and an adsorption control mechanism is arranged on the front side of the adsorption chamber (8) for adsorbing the movable cylinder (4) on the drawing surface. A slide groove (16) is arranged inside the drawing board (1) and the extension plate (2), and the slide groove (16) in the extension plate (2) and the slide groove (16) in the drawing board (1) are arranged in communication with each other, and a slide groove (16) is arranged inside the slide groove (16). A block (14) is provided, wherein a left-right sliding structure is formed between the slider (14) and the slide groove (16), and a through hole (15) is provided in the middle of the slider (14), and a position is provided for drawing lines through the through hole (15). A fixed block (17) is fixed on the right side of the slider (14), and a sliding limit mechanism is provided inside the fixed block (17) to limit the sliding of the slider (14) in the slide groove (16). A rotating connection mechanism is provided between the extension plate (2) and the drawing board (1), and the extension plate (2) can be rotated to a position parallel to the drawing board (1) through the rotating connection mechanism, and the extension plate (2) is folded. A positioning mechanism is provided on the outer side of the extension plate (2) to position the extension plate (2) before and after rotation to keep it stable.

2. A portable drawing auxiliary device for mathematics teaching according to claim 1, characterized in that: The surface of the movable cylinder (4) is evenly mounted with first rolling balls (6), and a baffle (5) is fixed to the surface of the movable cylinder (4), and the baffle (5) is located at the front and rear sides of the drawing board (1) to provide positioning for the movable cylinder (4).

3. A portable drawing auxiliary device for mathematics teaching according to claim 1, characterized in that: A rubber pad (7) is fixed to the rear side of the movable cylinder (4), and the rubber pad (7) is designed to be annular in structure, and the interior of the rubber pad (7) and the adsorption chamber (8) are connected to each other.

4. A portable drawing auxiliary device for mathematics teaching according to claim 1, characterized in that: An auxiliary block (12) is fixed to the right rear of the drawing board (1) and the right rear of the extension board (2), and a second ball bearing (13) is installed on the rear side of the auxiliary block (12), and the rear side of the auxiliary block (12) is flush with the rear side of the movable cylinder (4).

5. A portable drawing auxiliary device for mathematics teaching according to claim 1, characterized in that: The adsorption control mechanism comprises a movable plug (9), a control rod (10) and a first spring (11); A movable plug (9) is arranged inside the adsorption chamber (8) and between the adsorption chamber (8) to form a forward and backward sliding structure; A control rod (10) is fixed to the front side of the movable plug (9), and the front end of the control rod (10) penetrates the front side surface of the movable cylinder (4); The first spring (11) is arranged outside the control rod (10), and the rear end of the first spring (11) is connected to the movable cylinder (4) to provide a forward thrust for the control rod (10).

6. A portable drawing auxiliary device for mathematics teaching according to claim 1, characterized in that: The sliding limit mechanism comprises a limit block (18), a second spring (19), a top block (20), a third spring (21) and a push rod (22); A limit block (18) is arranged inside the fixed block (17) and between the fixed blocks (17) to form an up-and-down sliding structure; A second spring (19) is arranged on the outer side of the limit block (18) to provide a thrust for the limit block (18) to move inward; A top block (20) is arranged at the inner end of the limit block (18), and the surface of the top block (20) is designed to be inclined, and a left-right sliding structure is formed between the top block (20) and the fixed block (17); A third spring (21) is arranged on the left side of the top block (20) to provide a right thrust for the top block (20), and the elastic force of the third spring (21) is greater than the elastic force of the second spring (19); The push rod (22) is fixed on the right side of the top block (20), and the right end of the push rod (22) passes through the right side of the fixed block (17) to control the movement of the top block (20).

7. A portable drawing auxiliary device for mathematics teaching according to claim 1 or 6, characterized in that: The side cross-section of the slider (14) is designed to be an "H"-shaped structure, and third balls (23) are provided on both upper and lower sides of the slider (14) to assist the sliding of the slider (14).

8. A portable drawing auxiliary device for mathematics teaching according to claim 1, characterized in that: The rotary connection mechanism comprises a connection block (24), a movable shaft (25) and a support frame (26); A connecting block (24) is fixed to the front side of the extension plate (2); A movable shaft (25) fixed to the front side of the connecting block (24); The support frame (26) is fixed to the front side of the drawing board (1), and a rotation connection is formed between the movable shaft (25) and the support frame (26).

9. A portable drawing auxiliary device for mathematics teaching according to claim 8, characterized in that: The positioning mechanism comprises a first adsorption magnet (27) and a second adsorption magnet (28); The first adsorption magnets (27) are respectively arranged on the right side of the drawing board (1) and the left side of the extension board (2), and the first adsorption magnets (27) on the drawing board (1) and the first adsorption magnets (27) on the extension board (2) attract each other; The second adsorption magnets (28) are respectively arranged below the extension plate (2) and below the drawing board (1), and the two groups of second adsorption magnets (28) attract each other when facing each other.

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