Portable outdoor drawing device

Abstract

The invention relates to a portable outdoor drawing device which comprises a base, a telescopic rod assembly is inserted into the base, a supporting disc is inserted into the end, away from the base, of the telescopic rod assembly, a drawing board is placed on the supporting disc, the telescopic rod assembly is used for adjusting the height of the supporting disc, and a longitudinal flattening assembly is arranged on one side of the drawing board. The longitudinal flattening assembly is used for longitudinally flattening one side of the drawing paper and pressing the drawing paper at the same time, the transverse flattening assembly is arranged on the other side, away from the longitudinal flattening assembly, of the drawing board, and the transverse flattening assembly is used for transversely flattening the drawing paper and pressing the drawing paper at the same time. One end of the drawing paper is flattened while the drawing paper is pressed and fixed by the longitudinal flattening assembly, the other end of the drawing paper is pulled in the direction away from the longitudinal flattening assembly while the drawing paper is pressed and fixed by the transverse flattening assembly, the drawing paper is flattened, the drawing board is arranged on the supporting disc, and the supporting disc can rotate so that the orientation of the drawing board can be conveniently adjusted.

Description

Technical Field

[0001] The present application relates to an outdoor painting device, and particularly to a portable outdoor painting device. Background Art

[0002] When painting outdoors, various devices usually need to be carried, which is not portable, difficult to set up, and troublesome to operate. When fixing the drawing paper now, in order to avoid leaving a vibration space between the drawing paper and the drawing board, which affects painting, it is necessary to smooth it by hand and then use a pressing device to press it, which is time-consuming and laborious.

[0003] Chinese Patent CN115071326B discloses a multifunctional support device for art design. By means of a telescopic support assembly, the height of the storage box is adjusted. By means of a telescopic universal wheel assembly, it is convenient to move the support device. By means of a flipping assembly, the drawing board is adjusted to a suitable angle. By providing a clamping assembly and a flattening assembly, it is convenient to fix the drawing paper on the drawing board. The lower L-shaped slide rod and the upper L-shaped slide rod simultaneously flatten the drawing paper to the upper and lower sides, making the surface of the drawing paper smoother.

[0004] However, when using this device, the direction of the drawing board cannot be flexibly adjusted. After changing the viewing angle, when changing the standing position and adjusting the orientation of the drawing board, the entire support device needs to be moved, and it is inevitable to re-level the support device. When fixing the drawing paper to the drawing board, the clamping fixation and flattening are operated separately, which increases the steps, is time-consuming and laborious, and it is inconvenient to flatten the drawing paper after clamping and fixing. Summary of the Invention

[0005] In view of the above-mentioned prior art, the present application aims to provide a portable outdoor painting device. The support disk of the drawing board is designed as a rotatable structure, which is convenient to adjust the orientation of the drawing board without moving the entire painting device and then performing a leveling operation. A longitudinal flattening assembly is installed on the drawing board to longitudinally flatten and press one side of the drawing paper simultaneously. A transverse flattening assembly is installed on the other side of the drawing board away from the longitudinal flattening assembly to flatten and press the other end of the drawing paper simultaneously, simplifying the steps of fixing and flattening the drawing paper.

[0006] To achieve the above object, the technical solution of the embodiment of the present invention is realized as follows:

[0007] A portable outdoor painting device includes a base. A telescopic rod assembly is inserted into the base. One end of the telescopic rod assembly away from the base is inserted with a support disk. A drawing board is placed on the support disk. The telescopic rod assembly is used to adjust the height of the support disk. A longitudinal flattening assembly is arranged on one side of the drawing board, and the longitudinal flattening assembly is used to longitudinally flatten and press one side of the drawing paper simultaneously. A transverse flattening assembly is arranged on the other side of the drawing board away from the longitudinal flattening assembly, and the transverse flattening assembly is used to horizontally flatten and press the drawing paper and press the drawing paper simultaneously.

[0008] Further, the longitudinal flattening assembly includes a pressing mechanism and a flattening mechanism. The pressing mechanism includes two first support plates which are fixedly connected to the edge of the drawing board. A first cross plate is provided at the top of the first support plate. The first cross plate is parallel to the plane where the drawing board is located. A fixed pressing plate is provided between the first cross plate and the drawing board. The fixed pressing plate is arranged along the longitudinal direction of the drawing board. A first driving bolt is rotatably connected to the top of the fixed pressing plate. The first driving bolt penetrates through the first cross plate and is threadedly connected to the first cross plate. A first limiting rod is fixedly connected to the top of the fixed pressing plate. The first limiting rod penetrates through the first cross plate and is slidably connected to the first cross plate. The flattening mechanism is arranged at both ends of the fixed pressing plate. The flattening mechanism includes a fixed rod which is rotatably connected to the fixed pressing plate. An elastic telescopic rod is provided between the fixed rod and the fixed pressing plate. Both ends of the elastic telescopic rod are respectively rotatably connected to the fixed rod and the fixed pressing plate. A flattening member is provided at one end of the fixed rod close to the drawing board.

[0009] Further, a hole groove is provided at the bottom of the fixed pressing plate. A sliding rod is slidably connected in the hole groove. A spring is arranged in the hole groove. Both ends of the spring are respectively fixedly connected to the fixed pressing plate and the sliding rod. A sliding pressing plate is fixedly connected to the end of the sliding rod away from the spring. The sliding pressing plate can be completely retracted into the hole groove.

[0010] Further, the flattening member is a cylindrical roller. The axial direction of the roller is parallel to the plane where the drawing board is located.

[0011] Further, the flattening member is a thin plate. The thin plate is rotatably connected to the fixed rod. The axial direction of the rotation axis of the thin plate is parallel to the plane where the drawing board is located. Both ends of the thin plate are arc-shaped.

[0012] Further, the transverse flattening assembly includes a downward pressing mechanism and a rotating and pulling mechanism. The downward pressing mechanism includes two second support plates which are fixedly connected to the edge of the drawing board. A second cross plate is provided at the top of the second support plate. A second driving bolt is rotatably connected to the top of the second cross plate. A third cross plate is provided above the second cross plate. The second driving bolt penetrates through the third cross plate and is threadedly connected to the third cross plate. A second limiting rod is fixedly connected to the lower part of the third cross plate. The second limiting rod penetrates through the second cross plate and is slidably connected to the second cross plate. A rotating shaft is rotatably connected to the end of the second limiting rod away from the third cross plate. A pressing roller is sleeved on the rotating shaft. The rotating and pulling mechanism includes a gear. A through groove is formed in the second support plate. The width of the through groove is the same as the diameter of the rotating shaft. The end of the rotating shaft penetrates through the through groove and is slidably connected in the through groove. The gear is installed at the end of the rotating shaft. A rack is fixedly installed on the outside of the second support plate. The gear is meshed with the rack to drive the descending rotating shaft to rotate to flatten the drawing paper.

[0013] Further, a one-way bearing is connected to the end of the rotating shaft. The inner ring of the one-way bearing is fixedly connected to the rotating shaft. The outer ring of the one-way bearing is fixedly connected to the gear.

[0014] Further, the support plate includes a support platform. A turntable is embedded in the bottom of the support platform. The turntable is rotatably connected to the support platform. A groove is provided at the center of the turntable. The telescopic rod assembly is inserted into the groove. A fastening bolt is provided on the side surface of the support platform to lock the rotation of the support platform. A clamping block and a clamping groove are provided on the top of the support platform. The clamping block is used to clamp the drawing board. An adjusting rod is rotatably connected to the surface of the drawing board close to the support platform. The clamping groove is used to clamp the adjusting rod.

[0015] Further, a plurality of placement grooves are provided on the base. The placement grooves are used to place the telescopic rod assembly and the support plate. Leveling components are provided at the four corners on the outside of the base. Each leveling component includes a nut. The nut is fixedly connected to the base. A screw rod is threadedly connected to the nut. One end of the screw rod close to the ground is fixedly connected to a backing plate.

[0016] The beneficial effects of the present invention are as follows: A longitudinal flattening component and a transverse flattening component are provided on the drawing board. One side of the drawing paper is placed under the longitudinal flattening component to achieve longitudinal flattening and simultaneous pressing of one end of the drawing paper. The other end of the drawing paper is placed under the transverse flattening component to horizontally tighten and flatten the drawing paper while pressing it, simplifying the operation steps.

[0017] A one-way bearing is provided on the transverse flattening component. When the pressing roller presses the drawing paper, if the drawing paper fails to be flattened in one go and the operation is repeated, the pressing roller will not reversely friction and pull the drawing paper to cause the drawing paper to be wrinkled again. The pressing roller will only pull and flatten the drawing paper in one direction.

[0018] The support plate of the drawing board is set to a rotatable structure, which can conveniently rotate and adjust the orientation of the drawing board without moving the entire painting device for leveling operation, saving time and effort. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of a portable outdoor painting device of the present invention;

[0020] Figure 2 is a schematic diagram of the longitudinal flattening component of a portable outdoor painting device of the present invention;

[0021] Figure 3 is a side view of the longitudinal flattening component of a portable outdoor painting device of the present invention;

[0022] Figure 4 is a cross-sectional view of the fixed pressing plate of a portable outdoor painting device of the present invention;

[0023] Figure 5 is a schematic diagram of the first flattening member of a portable outdoor painting device of the present invention;

[0024] Figure 6 is a schematic diagram of the second flattening member of a portable outdoor painting device of the present invention;

[0025] Figure 7 Schematic diagram of the horizontal pressing and flattening component of a portable outdoor painting device according to the present invention;

[0026] Figure 8 Side view of the horizontal pressing and flattening component of a portable outdoor painting device according to the present invention;

[0027] Figure 9 Bottom view of the support plate of a portable outdoor painting device according to the present invention;

[0028] Figure 10 Schematic diagram of the support plate of a portable outdoor painting device according to the present invention;

[0029] Figure 11 Schematic diagram of the base of a portable outdoor painting device according to the present invention;

[0030] Figure 12 Schematic diagram of the leveling component of a portable outdoor painting device according to the present invention.

[0031] Explanation of the reference numerals in the attached drawings: 1. Base; 2. Telescopic rod assembly; 3. Support plate; 4. Drawing board; 5. Vertical pressing and flattening component; 6. Horizontal pressing and flattening component; 7. Fixed pressing plate; 8. First limiting rod; 9. First driving bolt; 10. Fixed rod; 11. Flattening member; 12. Elastic telescopic rod; 13. First support plate; 14. First cross plate; 15. Second support plate; 16. Second cross plate; 17. Third cross plate; 18. Second limiting rod; 19. Second driving bolt; 20. Pressing roller; 21. Rack; 22. Gear; 23. Rotating shaft; 24. One-way bearing; 25. Through groove; 26. Adjusting rod; 27. Block; 28. Slot; 29. Turntable; 30. Support platform; 31. Groove; 32. Tightening bolt; 33. Placing groove; 34. Leveling component; 35. Nut; 36. Screw rod; 37. Pad; 38. Sliding pressing plate; 39. Hole groove; 40. Spring; 41. Slide bar. Detailed implementation manners

[0032] The technical solution of the present invention will be further elaborated in detail below in conjunction with the drawings in the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. In the following description, the expression "some embodiments" describes a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0033] With reference to the attached Figures 1 to 12, the present invention provides a portable outdoor painting device, which includes a base 1. An expansion rod assembly 2 is inserted on the base 1. One end of the expansion rod assembly 2 away from the base 1 is plugged with a support plate 3. A drawing board 4 is placed on the support plate 3. The expansion rod assembly 2 is used to adjust the height of the support plate 3. A longitudinal flattening assembly 5 is arranged on one side of the drawing board 4. The longitudinal flattening assembly 5 is used to longitudinally flatten one side of the drawing paper and simultaneously press the drawing paper. A transverse flattening assembly 6 is arranged on the other side of the drawing board 4 away from the longitudinal flattening assembly 5. The transverse flattening assembly 6 is used to transversely flatten the drawing paper and simultaneously press the drawing paper. The expansion rod assembly 2 is plugged on the base 1, which is convenient for adjusting the height of the support plate 3. The drawing board 4 is placed on the support plate 3, so as to adjust the height of the drawing board 4. The longitudinal flattening assembly 5 is arranged on the left side of the drawing board 4. One end of the drawing paper is placed under the longitudinal flattening assembly 5, so as to simultaneously flatten and press the drawing paper longitudinally. The other end of the drawing paper is placed under the transverse flattening assembly 6, and the drawing paper is pulled in the direction away from the longitudinal flattening assembly 5 and simultaneously pressed and fixed, which simplifies the operation steps.

[0034] Preferably, the longitudinal flattening assembly 5 includes a pressing mechanism and a flattening mechanism. The pressing mechanism includes two first support plates 13, the first support plates 13 are fixedly connected to the edge of the drawing board 4, a first cross plate 14 is arranged on the top of the first support plate 13, the first cross plate 14 is parallel to the plane where the drawing board 4 is located, a fixed pressing plate 7 is arranged between the first cross plate 14 and the drawing board 4, the fixed pressing plate 7 is arranged longitudinally along the drawing board 4, a first driving bolt 9 is rotatably connected to the top of the fixed pressing plate 7, the first driving bolt 9 penetrates through the first cross plate 14 and is threadedly connected to the first cross plate 14, a first limiting rod 8 is fixedly connected to the top of the fixed pressing plate 7, the first limiting rod 8 penetrates through the first cross plate 14 and is slidably connected to the first cross plate 14. The flattening mechanism is arranged at both ends of the fixed pressing plate 7. The flattening mechanism includes a fixed rod 10, the fixed rod 10 is rotatably connected to the fixed pressing plate 7, an elastic telescopic rod 12 is arranged between the fixed rod 10 and the fixed pressing plate 7, both ends of the elastic telescopic rod 12 are respectively rotatably connected to the fixed rod 10 and the fixed pressing plate 7, and a flattening member 11 is arranged at one end of the fixed rod 10 close to the drawing board 4. During use, one end of the drawing paper is placed under the fixed pressing plate 7, the first driving bolt 9 is rotated, the first driving bolt 9 is threadedly connected to the first cross plate 14, so that the first driving bolt 9 pushes the fixed pressing plate 7 to move downward, and the first limiting rod 8 enables the fixed pressing plate 7 to move downward without rotation. The flattening members 11 are arranged at both ends of the fixed pressing plate 7, and the elevation of the flattening members 11 is smaller than the bottom elevation of the fixed pressing plate 7. The flattening members 11 at both ends first contact the drawing paper. During the downward movement of the fixed pressing plate 7, the fixed rod 10 rotates upward, the flattening members 11 rotate upward and move away from the fixed pressing plate 7, and the flattening members 11 at both ends pull and flatten the drawing paper toward both ends. The fixed pressing plate 7 continues to descend, and finally the bottom of the fixed pressing plate 7 presses the flattened drawing paper against the drawing board. An elastic telescopic rod 12 is arranged between the fixed pressing plate 7 and the fixed rod 10 to increase the downward pressure of the flattening member 11, improve the friction between the flattening member 11 and the drawing paper, and improve the flattening effect. At the same time, when the fixed pressing plate 7 moves upward, the fixed rod 10 returns to its original position under the action of the elastic telescopic rod 12, and the flattening member 11 returns to its original position. By the first driving bolt 9, the flattening and pressing fixation of one end of the drawing paper are synchronously realized, which saves time and effort and has a good effect.

[0035] Preferably, a hole groove 39 is provided at the bottom of the fixed pressing plate 7. A sliding rod 41 is slidably connected in the hole groove 39. A spring 40 is arranged in the hole groove 39. Two ends of the spring 40 are fixedly connected to the fixed pressing plate 7 and the sliding rod 41 respectively. One end of the sliding rod 41 away from the spring 40 is fixedly connected to a sliding pressing plate 38. The sliding pressing plate 38 can be completely retracted into the hole groove 39. When the fixed pressing plate 7 moves downward, the sliding pressing plate 38 first contacts and presses the drawing paper, preventing the drawing paper from deviating from the center of the drawing board 4 due to the stretching member 11 pulling the drawing paper to both sides. During the continuous downward movement of the fixed pressing plate 7, the sliding pressing plate 38 compresses the spring 40 upward until the sliding pressing plate 38 completely enters the hole groove 39. Finally, the bottom surface of the sliding pressing plate 38 is parallel to the bottom surface of the fixed pressing plate 7, and the pressure on the drawing paper is consistent, preventing indentations from being generated on the drawing paper and improving the fixing effect of the drawing paper.

[0036] Preferably, the stretching member 11 is a cylindrical roller. The axial direction of the roller is parallel to the plane where the drawing board 4 is located. When the two rollers move away from each other, they squeeze and flatten the drawing paper. In a better solution, the roller is rotatably connected to the end of the fixed rod 10. A ratchet and pawl structure is arranged between the roller and the fixed rod 10. When the roller moves in the direction away from the fixed pressing plate 7, the pawl is locked and the roller does not rotate. The roller frictions and flattens the drawing paper to achieve the purpose of flattening and pressing the drawing paper. When the fixed pressing plate 7 rises to take out the drawing paper, the roller moves toward the fixed pressing plate 7 under the action of the elastic telescopic rod 12. At this time, the roller can rotate flexibly, reducing the friction between the roller and the drawing paper and preventing the two rollers from squeezing the drawing paper toward the middle to generate creases.

[0037] Preferably, the stretching member 11 is a thin plate. The thin plate is rotatably connected to the fixed rod 10. The axial direction of the rotation axis of the thin plate is parallel to the plane where the drawing board 4 is located. Both ends of the thin plate are arc-shaped. The pressing of the thin plate on the drawing paper is a surface. When the thin plate frictions the drawing paper and pulls it flat to both ends, the flatness is higher, the friction force on the drawing paper is greater, and it is easier to traction and flatten the drawing paper. The thin plate can always maintain effective contact with the ground and the drawing paper as the fixed rod 10 rotates. Both ends of the thin plate in the moving direction are arc-shaped, effectively avoiding scratching the drawing paper with sharp angles.

[0038] Preferably, the horizontal flattening assembly 6 includes a downward pressing mechanism and a rotating and pulling mechanism. The downward pressing mechanism includes two second support plates 15, which are fixedly connected to the edge of the drawing board 4. The top of the second support plate 15 is provided with a second horizontal plate 16. The top of the second horizontal plate 16 is rotatably connected with a second driving bolt 19. Above the second horizontal plate 16 is provided a third horizontal plate 17. The second driving bolt 19 passes through the third horizontal plate 17 and is threadedly connected to the third horizontal plate 17. The lower part of the third horizontal plate 17 is fixedly connected with a second limiting rod 18. The second limiting rod 18 passes through the second horizontal plate 16 and is slidably connected to the second horizontal plate 16. The end of the second limiting rod 18 away from the third horizontal plate 17 is rotatably connected with a rotating shaft 23. A pressing roller 20 is sleeved on the rotating shaft 23. The rotating and pulling mechanism includes a gear 22. A through groove 25 is formed in the second support plate 15. The width of the through groove 25 is the same as the diameter of the rotating shaft 23. The end of the rotating shaft 23 passes through the through groove 25 and is slidably connected in the through groove 25. The gear 22 is installed at the end of the rotating shaft 23. A rack 21 is fixedly installed on the outside of the second support plate 15. The gear 22 is meshed with the rack 21 to drive the descending rotating shaft 23 to rotate to flatten the drawing paper. When in use, one end of the drawing paper has been longitudinally flattened and pressed by the longitudinal flattening assembly 5. The other end of the drawing paper is placed under the horizontal flattening assembly 6. Rotate the second driving bolt 19. The second driving bolt 19 is rotatably connected to the second horizontal plate 16, and the height of the second driving bolt 19 does not change. The second driving bolt 19 is threadedly connected to the third horizontal plate 17, so that the third horizontal plate 17 descends. The second limiting rod 18 connected to the third horizontal plate 17 moves downward. The end of the second limiting rod 18 away from the third horizontal plate 17 is rotatably connected to the rotating shaft 23, so that the end of the rotating shaft 23 moves downward in the through groove 25. A gear 22 is connected to the end of the rotating shaft 23. When the rotating shaft 23 moves downward, the gear 22 moves along the rack 21, causing the rotating shaft 23 to rotate. The pressing roller 20 is sleeved on the rotating shaft 23, and the pressing roller 20 also rotates. During the downward movement of the pressing roller 20, the pressing roller 20 rotates counterclockwise. The bottom of the pressing roller 20 contacts the drawing paper, and the frictional force pulls and flattens the drawing paper in the direction away from the longitudinal flattening assembly 5. The surface of the pressing roller 20 is covered with a rubber layer. During the process of the pressing roller 20 pressing the drawing paper, the frictional force continuously pulls the drawing paper until it is flattened. While pressing the drawing paper, the drawing paper is flattened, so as not to waste time during the process of pressing and flattening the drawing paper and then pressing it again.

[0039] Preferably, a one-way bearing 24 is connected to the end of the rotating shaft 23. The inner ring of the one-way bearing 24 is fixedly connected to the rotating shaft 23, and the outer ring of the one-way bearing 24 is fixedly connected to the gear 22. When the rotating shaft 23 moves downward, the gear 22 moves along the rack 21. At this time, the one-way bearing 24 is locked, and the rotation generated by the gear 22 is transmitted to the rotating shaft 23, so that during the process of the pressure roller 20 pressing down on the drawing paper, the pressure roller 20 rotates to pull and flatten the drawing paper. When the rotating shaft 23 moves upward, the gear 22 moves upward along the rack 21. At this time, the one-way bearing 24 can rotate smoothly, and the rotation of the gear 22 cannot be transmitted to the rotating shaft 23. The rotating shaft 23 only moves upward without reverse rotation, and the pressure roller 20 does not rotate during the upward movement, so that when the horizontal flattening assembly 6 is loosened to take out the drawing paper, the pressure roller 20 will not reverse and push the drawing paper to generate wrinkles. At the same time, when the drawing paper fails to be flattened at one time, the second driving bolt 19 is rotated in the reverse direction and then rotated in the forward direction, so that the pressure roller 20 directly rises and then rotates downward to press and flatten the drawing paper, effectively preventing wrinkles from being generated when taking out the drawing paper, and the pressure roller 20 can be lifted and lowered multiple times until the drawing paper is flattened.

[0040] Preferably, the support disk 3 includes a support platform 30. A turntable 29 is embedded at the bottom of the support platform 30. The turntable 29 is rotatably connected to the support platform 30. A groove 31 is provided at the center of the turntable 29. The telescopic rod assembly 2 is inserted into the groove 31. A fastening bolt 32 is provided on the side surface of the support platform 30 to lock the rotation of the support platform 30. A clamping block 27 and a clamping groove 28 are provided at the top of the support platform 30. The clamping block 27 is used to clamp the drawing board 4. One side surface of the drawing board 4 close to the support platform 30 is rotatably connected to an adjusting rod 26. The clamping groove 28 is used to clamp the adjusting rod 26. During use, the telescopic rod assembly 2 is inserted into the groove 31. The drawing board 4 is placed on the support platform 30. By rotating the support platform 30, the orientation of the drawing board 4 can be adjusted arbitrarily, and then it is locked and fixed by the fastening bolt 32 on the side surface of the support platform 30. One side edge of the drawing board is stuck at the clamping block 27, and the adjusting rod 26 on the back of the drawing board 4 adjusts the pitching angle of the drawing board 4. The adjusting rod 26 is stuck in the clamping groove 28 for fixation.

[0041] Preferably, a plurality of placement grooves 33 are provided on the base 1. The placement grooves 33 are used to place the telescopic rod assembly 2 and the support disk 3. Leveling assemblies 34 are provided at the four corners on the outside of the base 1. The leveling assembly 34 includes a nut 35. The nut 35 is fixedly connected to the base 1. A screw rod 36 is threadedly connected inside the nut 35. One end of the screw rod 36 close to the ground is fixedly connected to a backing plate 37. After removing the telescopic rod assembly 2 and putting it into the placement groove 33 on the base 1 together with the support disk 3, and then placing the drawing board 4 on it, the whole painting device can be conveniently collected. At the same time, when on an uneven ground, the four leveling assemblies 34 are adjusted and distributed, and the screw rod 36 is rotated so that the backing plate 37 contacts the ground, which is convenient for leveling the whole painting device.

[0042] Working principle: Turn on the painting device and level it using the leveling component 34 to keep the base 1 horizontal. Assemble and insert the telescopic rod component 2 onto the base 1, insert the turntable 29 onto the telescopic rod component 2, place the drawing board 4 on the support platform 30, adjust the orientation of the drawing board 4 by rotating the support platform 30, and adjust the pitch angle of the drawing board 4 using the adjusting rod 26 on the back of the drawing board 4. After adjustment, place one side of the drawing paper under the fixed pressing plate 7 and rotate the first driving bolt 9 to drive the fixed pressing plate 7 to move towards the drawing board 4. During the downward movement of the fixed pressing plate 7, the flattening parts 11 at both ends of the fixed pressing plate 7 first press on the drawing paper. As the fixed pressing plate 7 continues to move downward, the two flattening parts 11 move away from each other, and the friction force pulls the two ends of one side of the drawing paper away from each other until it is flattened and finally pressed and fixed by the fixed pressing plate 7. The two ends of one side of the drawing paper are pressed and fixed by the flattening parts 11. Place the other side of the drawing paper under the pressing roller 20 and rotate the second driving bolt 19 to drive the rotating shaft 23 to move downward along the through groove 25. The gear 22 on the rotating shaft 23 moves along the rack 21, causing the rotating shaft 23 to rotate on its own. During the downward pressing process of the rotating shaft 23, the pressing roller 20 presses on the drawing paper, and the rotation of the pressing roller 20 generates friction with the drawing paper. The friction force pulls the drawing paper in the direction away from the longitudinal flattening component 5, causing the drawing paper to be flattened horizontally and pressed. Since the longitudinal flattening component 5 has already made one side of the drawing paper flat, a line where the pressing roller 20 contacts the drawing paper, the friction force of the pressing roller 20 pulls the drawing paper to the other side and fixes it, causing the entire drawing paper to be flattened and pressed.

[0043] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A portable outdoor painting device, comprising a base (1), a telescopic rod assembly (2) being inserted on the base (1), a support plate (3) being inserted at one end of the telescopic rod assembly (2) away from the base (1), a drawing board (4) being placed on the support plate (3), characterized in that: The telescopic rod assembly (2) is used to adjust the height of the support plate (3); a longitudinal flattening assembly (5) is provided on one side of the drawing board (4); the longitudinal flattening assembly (5) is used to longitudinally flatten one side of the drawing paper and simultaneously press the drawing paper tightly; a transverse flattening assembly (6) is provided on the other side of the drawing board (4) away from the longitudinal flattening assembly (5); the transverse flattening assembly (6) is used to transversely flatten the drawing paper and simultaneously press the drawing paper tightly.

2. A portable outdoor painting device according to claim 1, characterized in that: The longitudinal flattening assembly (5) comprises a clamping mechanism and a flattening mechanism, wherein the clamping mechanism comprises two first support plates (13), wherein the first support plates (13) are fixedly connected to the edge of the drawing board (4), wherein a first transverse plate (14) is arranged on the top of the first support plate (13), wherein the first transverse plate (14) is parallel to the plane where the drawing board (4) is located, wherein a fixed pressure plate (7) is arranged between the first transverse plate (14) and the drawing board (4), wherein the fixed pressure plate (7) is arranged along the longitudinal direction of the drawing board (4), wherein the top of the fixed pressure plate (7) is rotatably connected to a first driving bolt (9), wherein the first driving bolt (9) passes through the first transverse plate (14) and is engaged with the first transverse plate (14). 14) is threadedly connected, the top of the fixed pressure plate (7) is fixedly connected with a first limiting rod (8), the first limiting rod (8) passes through the first cross plate (14) and is slidably connected to the first cross plate (14), the flattening mechanism is arranged at both ends of the fixed pressure plate (7), the flattening mechanism includes a fixed rod (10), the fixed rod (10) is rotatably connected to the fixed pressure plate (7), an elastic telescopic rod (12) is arranged between the fixed rod (10) and the fixed pressure plate (7), the two ends of the elastic telescopic rod (12) are respectively rotatably connected to the fixed rod (10) and the fixed pressure plate (7), and a flattening member (11) is provided at one end of the fixed rod (10) close to the drawing board (4).

3. A portable outdoor painting device according to claim 2, characterized in that: A hole groove (39) is provided at the bottom of the fixed pressure plate (7), a slide rod (41) is slidably connected in the hole groove (39), a spring (40) is provided in the hole groove (39), two ends of the spring (40) are respectively fixedly connected to the fixed pressure plate (7) and the slide rod (41), one end of the slide rod (41) away from the spring (40) is fixedly connected to the sliding pressure plate (38), and the sliding pressure plate (38) can be completely retracted into the hole groove (39).

4. A portable outdoor painting device according to claim 2, characterized in that: The flattening member (11) is a cylindrical roller, and the axis direction of the roller is parallel to the plane where the drawing board (4) is located.

5. A portable outdoor painting device according to claim 2, characterized in that: The flattening member (11) is a thin plate, which is rotatably connected to the fixing rod (10), the axis direction of the rotation axis of the thin plate is parallel to the plane where the drawing board (4) is located, and the two ends of the thin plate are in arc shape.

6. The portable outdoor painting device according to claim 1, characterized in that: The horizontal pressing assembly (6) comprises a pressing mechanism and a rotating and pulling mechanism, wherein the pressing mechanism comprises two second support plates (15), wherein the second support plate (15) is fixedly connected to the edge of the drawing board (4), a second horizontal plate (16) is arranged at the top of the second support plate (15), a second driving bolt (19) is rotatably connected to the top of the second horizontal plate (16), a third horizontal plate (17) is arranged above the second horizontal plate (16), the second driving bolt (19) passes through the third horizontal plate (17) and is threadedly connected to the third horizontal plate (17), a second limiting rod (18) is fixedly connected to the lower part of the third horizontal plate (17), the second limiting rod (18) passes through the second horizontal plate (16) and is threadedly connected to the second horizontal plate (17), 6) sliding connection, the end of the second limit rod (18) away from the third horizontal plate (17) is rotatably connected to a rotating shaft (23), a pressure roller (20) is sleeved on the rotating shaft (23), the rotating and pulling mechanism includes a gear (22), a through groove (25) is opened on the second support plate (15), the width of the through groove (25) is consistent with the diameter of the rotating shaft (23), the end of the rotating shaft (23) passes through the through groove (25) and is slidably connected in the through groove (25), the gear (22) is installed at the end of the rotating shaft (23), and a rack (21) is fixedly installed on the outer side of the second support plate (15), and the gear (22) is meshed with the rack (21) to drive the descending rotating shaft (23) to rotate to flatten the drawing paper.

7. A portable outdoor painting device according to claim 6, characterized in that: The end of the rotating shaft (23) is connected to a one-way bearing (24), the inner ring of the one-way bearing (24) is fixedly connected to the rotating shaft (23), and the outer ring of the one-way bearing (24) is fixedly connected to the gear (22).

8. The portable outdoor painting device according to claim 1, characterized in that: The support plate (3) comprises a support platform (30), a turntable (29) is embedded in the bottom of the support platform (30), the turntable (29) is rotatably connected to the support platform (30), a groove (31) is provided at the center of the turntable (29), the telescopic rod assembly (2) is inserted into the groove (31), a fastening bolt (32) is provided on the side of the support platform (30) to lock the rotation of the support platform (30), a clamping block (27) and a clamping groove (28) are provided on the top of the support platform (30), the clamping block (27) is used to clamp the drawing board (4), and an adjusting rod (26) is rotatably connected to the surface of one side of the drawing board (4) close to the support platform (30), and the clamping groove (28) is used to clamp the adjusting rod (26).

9. The portable outdoor painting device according to claim 1, characterized in that: The base (1) is provided with a plurality of placement grooves (33), the placement grooves (33) being used to place the telescopic rod assembly (2) and the support plate (3), and the four corners on the outer side of the base (1) are provided with leveling assemblies (34), the leveling assemblies (34) comprising a nut (35), the nut (35) being fixedly connected to the base (1), the nut (35) being internally threadedly connected to a screw rod (36), and the end of the screw rod (36) close to the ground being fixedly connected to a pad (37).

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