Portable drawing support

Abstract

The invention relates to the technical field of drawing tools, in particular to a portable drawing support which comprises two supporting beams, a guide rail is rotatably arranged between one ends of the two supporting beams, an n-shaped frame is rotatably connected between the bottoms of the two supporting beams, and plug pin assemblies are movably connected between the two ends of the n-shaped frame and the supporting beams at the corresponding positions in an inserted mode. A clamp is arranged on the outer side of the guide rail in a sliding mode and comprises a movable plate connected with the guide rail in a sliding mode, and a ruler plate is installed on the bottom face of the movable plate in a sliding mode. According to the drawing clamp, the bottom of paper and the bottom of the base plate are pressed and fixed between the two supporting beams together through the guide rails, and the reeds are clamped to the top of the base plate through the buckle pieces so that the whole clamp can move to different areas of the surface of the paper to further press and fix the paper and the base plate to the drawing support; the ruler plates moved to different positions can assist a user in drawing straight lines or oblique lines in different areas of paper, and the diversity of the overall functions of the drawing support is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drawing tools, and specifically to a portable drawing support. Background Art

[0002] As an essential auxiliary tool for designers to draw, a drawing support not only provides a stable working platform for designers, but also improves the drawing efficiency and comfort through its adjustable height and angle. Generally, a drawing board, a watercolor board, a backlight copy table and other drawing pads are equipped on the drawing support. The pads need to be clamped and fixed on the support by clamps. The papers such as drawing papers and drafting papers laid on the pads also need to be clamped and fixed on the pads by clamps to prevent the papers from shifting during the drawing process and affecting the drawing.

[0003] Currently, the clamps for fixing pads and the clamps for fixing papers on most drawing supports are not universal, resulting in multiple different types and functions of clamps on the drawing support, increasing the manufacturing cost of the drawing support and also affecting the convenient carrying of the drawing support by designers. Moreover, a ruler is used to draw lines in different directions during the drawing process, and the clamps on most drawing supports are not conducive to assisting in drawing lines while performing the clamping and fixing function. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable drawing support to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A portable drawing support, comprising:

[0007] Support beams, two in number, and a guide rail is rotatably connected between the two support beams;

[0008] A U-shaped frame, rotatably connected to the two support beams, and a pin assembly is movably inserted between the two ends of the U-shaped frame and the corresponding support beams;

[0009] Clamps, arranged outside the guide rail, the clamps include a movable plate slidably connected to the guide rail, a ruler plate is slidably installed on the bottom surface of the movable plate, two movable rulers are hinged to one side of the ruler plate, a reed is slidably installed on the top of the ruler plate, two buckle pieces are rotated at one end of the reed, and a roller is rotatably connected to the bottom surface of the reed;

[0010] Drawing pads, arranged on the tops of the two support beams, the guide rail is movably abutted against the bottom of the drawing pads, and the ruler plate is movably pressed against the surface of the drawing pads;

[0011] A receiving box, arranged at one end of the guide rail, for receiving eraser crumbs during drawing.

[0012] Furthermore, a V-shaped frame is fixedly arranged inside the receiving box, a connecting shaft is rotatably inserted in the middle of the V-shaped frame, and the connecting shaft is inserted and fixed with the guide rail.

[0013] Furthermore, a third stud is fixedly arranged at the bottom of the scale plate, the third stud is rotatably inserted with the movable plate, and a collar is screwed at one end of the third stud.

[0014] Furthermore, the buckle piece is rotatably connected with the reed piece through a rotating shaft, and a torsion spring is sleeved between the rotating shaft and the reed piece.

[0015] Furthermore, two limit posts which are both slidably inserted with the reed piece are fixedly arranged at the top of the scale plate, and a second stud is screwed between the scale plate and the reed piece.

[0016] Furthermore, the plug pin assembly comprises a connecting rod, a first pin shaft and a second pin shaft are respectively fixed at two ends of the connecting rod, a first pin hole which is movably inserted with the first pin shaft is formed in the outer side of the support beam, a plurality of second pin holes are formed at both ends of the U-shaped frame, and the second pin shaft is selectively inserted into the corresponding second pin hole.

[0017] Furthermore, scale marks are arranged on the outer sides of the scale plate and the movable scale.

[0018] Furthermore, an L-shaped block is arranged in a butting manner at one end of the support beam, and a first stud is screwed between the L-shaped block and the support beam.

[0019] Furthermore, a support seat is fixedly arranged at the bottom of the support beam, a support shaft is fixedly arranged at the top of the support seat, and connecting blocks which are respectively rotatably connected with the corresponding support shafts are fixedly arranged at both ends of the guide rail.

[0020] Furthermore, a notch is formed in the outer side of the guide rail, and a brush is fixedly arranged on the bottom surface of the movable plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. A guide rail is rotatably connected between the bottoms of two support beams. Inside the guide rail, a clamp composed of a movable plate, a scale plate, and a reed is rotatably connected. First, rotate the guide rail around the support axis towards the backing plate so that the guide rail is pressed against the outer bottom of the backing plate. Then, rotate the clamp towards the backing plate, and use the buckle to abut against the outer top of the backing plate so that the scale plate is pressed against the surface of the backing plate, thereby realizing the fixation of the backing plate pressed on the top of the support beam by the clamp. Before fixing the backing plate, paper can be laid on the surface of the backing plate, so that the clamp presses and fixes the paper on the surface of the backing plate while pressing and fixing the backing plate, which is beneficial to improving the diversity of the functions of the clamp. Moreover, the movable plate on the clamp can slide along the guide rail, so that the scale plate on the clamp can move to different areas of the paper to press and fix the paper. The guide rail is always pressed against the bottom of the paper, which is beneficial to improving the firmness of the drawing paper fixed on the backing plate.

[0023] 2. One end of the scale plate is movably installed on the movable plate, and the other end of the scale plate is movably installed on the reed. In the initial state, the scale plate on the clamp does not contact the paper outside the backing plate, which is convenient for moving the scale plate to different positions on the surface of the paper along the guide rail. Then, press the scale plate by hand, and under the action of the elastic deformation of the reed, the scale plate can contact the paper, which is convenient for the user to draw vertical lines along the edge of the scale plate in different areas on the surface of the paper. By rotating and unfolding the two movable scales outside the scale plate, the movable scales are convenient for the user to draw horizontal lines or oblique lines along the edges of the movable scales in different areas on the surface of the paper. By rotating the buckle to the bottom surface of the reed and then rotating on the movable plate with the stud three as the axis, it is convenient for the scale plate to draw longer oblique lines with different inclination angles obliquely on the paper surface. At the same time, the moving scale plate drives the two movable scales that can be rotated and adjusted in position to rotate synchronously, and it is also convenient for the shorter movable scale to move to different positions to draw short lines with different slopes, thereby realizing that different types of lines can be drawn by using the clamp while the paper is restricted by the clamp.

[0024] 3. By arranging one end of the backing plate close to the guide rail on the ground, the pin shaft two on the plug-in component can be inserted into the pin holes two at different positions on the U-shaped frame, realizing the adjustment of the inclination angle of the two support beams supporting the backing plate. The inclination angle range of the backing plate is between 0 degrees and 45 degrees, which is convenient for adjusting the inclination angle of the drawing bracket to the inclination angle suitable for engineering drawing for engineering drawing. Referring to Figure 5 , the drawing bracket can be inverted so that one end of the backing plate close to the guide rail is arranged at the top. Similarly, by moving the insertion position of the pin shaft two, the position of the backing plate can be adjusted in the range between 45 degrees and 80 degrees, which is convenient for adjusting the inclination angle of the drawing bracket to the inclination angle suitable for art sketching for sketching drawing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0026] Figure 2 is the schematic diagram of the overall structure of the present invention Figure 2 ;

[0027] Figure 3 is the schematic diagram of the structure of the movable ruler in the unfolded state of the present invention;

[0028] Figure 4 is the schematic diagram of the structure of the combination state of two backing plates in the present invention;

[0029] Figure 5 is the schematic diagram of the inverted state structure of the backing plate in the present invention;

[0030] Figure 6 is the schematic diagram of the support beam, C-shaped frame, and fixture structure in the present invention;

[0031] Figure 7 is the present invention Figure 6 partial enlarged structure schematic diagram at position B in;

[0032] Figure 8 is the present invention Figure 6 partial enlarged structure schematic diagram at position C in;

[0033] Figure 9 is the present invention Figure 1 partial enlarged structure schematic diagram at position A in;

[0034] Figure 10 is the schematic diagram of the structure of fixing the convex block at the bottom of the connection block in the present invention Figure 1 ;

[0035] Figure 11 is the schematic diagram of the structure of fixing the convex block at the bottom of the connection block in the present invention Figure 2 .

[0036] In the figure: 100, support beam; 110, guide rail; 111, connection block; 1111, convex block; 120, L-shaped block; 121, stud one; 130, support seat; 131, support shaft; 200, C-shaped frame; 210, pin assembly; 211, connecting rod; 212, pin one; 213, pin two; 300, fixture; 310, movable plate; 311, moving column; 312, brush; 320, ruler plate; 321, movable ruler; 322, limit post; 323, stud two; 324, stud three; 325, collar; 330, reed; 331, buckle; 332, roller; 333, limit groove one; 400, backing plate; 500, receiving box; 510, V-shaped frame; 511, connecting shaft. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1. Please refer to Figure 1 - Figure 9 , in the embodiment of the present invention, a portable drawing bracket includes two support beams 100. A guide rail 110 is rotatably connected between the two support beams 100. A U-shaped frame 200 is rotatably connected between the bottoms of the two support beams 100. Plug-in components 210 are movably inserted between the two ends of the U-shaped frame 200 and the support beams 100 at the corresponding positions. The plug-in components 210 are used to limit the position of the U-shaped frame 200. A clamp 300 is slidably arranged on the outer side of the guide rail 110. The clamp 300 includes a movable plate 310 slidably connected to the guide rail 110. A scale plate 320 is slidably mounted on the bottom surface of the movable plate 310. Two movable scales 321 are hinged to one side of the scale plate 320. A reed 330 is slidably mounted on the top of the scale plate 320. Two buckle pieces 331 are rotated at one end of the reed 330. A roller 332 is rotatably connected to the bottom surface of the reed 330. A cushion plate 400 is placed between the tops of the two support beams 100. The guide rail 110 is movably abutted against the bottom of the cushion plate 400. The scale plate 320 is movably pressed against the surface of the cushion plate 400. A receiving box 500 for receiving eraser debris is arranged at one end of the guide rail 110.

[0039] Specifically, by rotating a guide rail 110 between the two support beams 100, the movable plate 310 rotates and slides inside the guide rail 110. The scale plate 320 is slidably mounted on the top of the movable plate 310. The top of the scale plate 320 is flexibly clamped and fixed on the top of the cushion plate 400 through the reed 330. Thus, the guide rail 110 can press and fix the bottom of the paper and the bottom of the cushion plate 400 together between the two support beams 100. The reed 330 uses the buckle pieces 331 to clamp on the top of the cushion plate 400, enabling the entire clamp 300 to move to different areas on the paper surface to further press and fix the paper and the cushion plate 400 on the drawing bracket. The scale plate 320 moved to different positions can assist the user in drawing straight lines or oblique lines in different areas of the paper. Thus, the clamp 300 composed of the movable plate 310, the scale plate 320, and the reed 330 can not only press and fix the cushion plate and the paper simultaneously, but also assist the user in drawing different types of lines, which is beneficial to improving the diversity of the overall function of the drawing bracket.

[0040] As Figure 2As shown, in this embodiment, an L-shaped block 120 is arranged against one end of the support beam 100. A first stud 121 is screwed between the L-shaped block 120 and the support beam 100. A second limiting groove is formed through the outside of the L-shaped block 120. The first stud 121 passes through the second limiting groove and is screwed into the inside of the support beam 100, so that the L-shaped block 120 can limit and fix the top of the backing plate 400 to the top of the support beam 100.

[0041] In this embodiment, for backing plates 400 with different width dimensions, the position of the L-shaped block 120 can be moved along the support beam 100, so that the end of the L-shaped block 120 can abut against the outside of the top edge of the backing plate 400. Then, the first stud 121 is tightened so that the hand-held part on the first stud 121 can fix the L-shaped block 120 and the support beam 100 together, and further limit and fix the top of the backing plate 400 to the top of the support beam 100.

[0042] As Figure 8 and Figure 9 shown, in this embodiment, a support base 130 is fixed to the bottom of the support beam 100. A support shaft 131 is fixed to the top of the support base 130. Connecting blocks 111 respectively rotatably connected to the corresponding support shafts 131 are fixed to both ends of the guide rail 110. The rotation of the connecting blocks 111 around the support shafts 131 can make the guide rail 110 rotate to the surface of the backing plate 400, realizing the pre-limiting and fixing of the bottom of the backing plate 400 during the installation of the fixture 300. In the initial state, when the backing plate 400 is placed between the two inclined support beams 100, the support base 130 can block the bottom of the backing plate 400 to prevent the backing plate 400 from sliding down along the support beam 100 before installation.

[0043] As Figure 8 shown, in this embodiment, a columnar sliding groove is formed inside the guide rail 110. The moving column 311 slides inside the columnar sliding groove, so that the movable plate 310 can move along the guide rail 110 to different positions, making the fixture 300 move to different positions on the paper surface to fix the paper, and also facilitating the fixture 300 to move to different areas on the paper surface for the user to draw different types of lines.

[0044] As Figure 5 and Figure 8 shown, in this embodiment, a third stud 324 is fixed to the bottom of the scale plate 320. The third stud 324 is rotatably inserted into the movable plate 310. A collar 325 is screwed onto one end of the third stud 324. The collar 325 is screwed to the top of the third stud 324 to prevent the scale plate 320 from separating from the movable plate 310.

[0045] In this embodiment, referring to Figure 7The stud two 323 can be rotated so that the scale plate 320 can move away from the reed 330, reducing the distance between the scale plate 320 and the backing plate 400. This enables the scale plate 320 to easily press onto the paper on the surface of the backing plate 400 when the scale plate 320 is pressed, facilitating the user to draw straight or oblique lines on the paper with the help of the scale plate 320.

[0046] As Figure 3 and Figure 7 shown, in this embodiment, an L-shaped shaft is fixed to the bottom surface of the reed 330, and the L-shaped shaft is rotatably connected to the roller 332. During the movement of the scale plate 320 with the reed 330 along the backing plate 400, the roller 332 rolls on the top of the backing plate 400, facilitating the flexible adjustment of the position of the scale plate 320. A rotating shaft is inserted and fixed inside the buckle 331, and one end of the rotating shaft is rotatably inserted inside the reed 330. A torsion spring is sleeved between the rotating shaft and the reed 330. When the buckle 331 is not unfolded, the elastic force of the torsion spring can drive the buckle 331 to rotate and be received on the bottom surface of the reed 330. When the buckle 331 needs to be snapped onto the outside of the backing plate 400, the buckle 331 is unfolded outward by hand, enabling the buckle 331 to abut against the outside of the spacer 400.

[0047] In this embodiment, the reed 330 itself has elasticity. When the scale plate 320 is pressed forcefully, the reed 330 can slightly deform towards the backing plate 400 to allow the scale plate 320 to press onto the surface of the backing plate 400. After the hand releases the scale plate 320, the restoring elastic force of the reed 330 can make the scale plate 320 return to a position where it does not contact the backing plate 400.

[0048] As Figure 7 shown, in this embodiment, two limit posts 322 that are both slidably inserted into the reed 330 are fixed to the top of the scale plate 320. A stud two 323 is screwed between the scale plate 320 and the reed 330. A plurality of first limit slots 333 are formed through the outside of the reed 330, and both the limit posts 322 and the stud two 323 penetrate the first limit slots 333.

[0049] In this embodiment, the limit posts 322 can enable the scale plate 320 to flexibly adjust its position along the reed 330, allowing the buckle 331 on the reed 330 to be snapped onto the outside of backing plates 400 with different widths. The first limit slots 333 can also allow the limit posts 322 and the stud two 323 to move on the reed 330, facilitating the scale plate 320 to easily press onto the surface of the backing plate 400 when the scale plate 320 is pressed.

[0050] As Figure 4As shown, in this embodiment, two drawing brackets with the same slope of support forming can be combined together. When combining, the first pin shaft 212 is inserted into the first pin holes between two adjacent support beams 100, and the second pin shaft 213 is inserted into the second pin holes of two C-shaped frames 200, so as to firmly combine and fix two cushion plates 400 together, facilitating the user to lay a long piece of paper on the combined drawing bracket for drawing, which is beneficial to expanding the application range of the present application.

[0051] As Figure 2 shown, in this embodiment, the pin assembly 210 includes a connecting rod 211. The two ends of the connecting rod 211 are respectively fixed with a first pin shaft 212 and a second pin shaft 213. A first pin hole for movably inserting the first pin shaft 212 is formed on the outer side of the support beam 100. A plurality of second pin holes are formed at both ends of the C-shaped frame 200, and the second pin shaft 213 is selectively inserted into the corresponding second pin holes.

[0052] In this embodiment, the first pin shaft 212 is always rotatably inserted into the support beam 100, and the second pin shaft 213 can be inserted into the second pin holes at different positions according to needs, so as to adjust the support inclination angle of the C-shaped frame 200, facilitating the support of the cushion plate 400 on the ground or the desktop for drawing at different inclination angles.

[0053] In this embodiment, when it is necessary to fold and store the drawing bracket for convenient carrying, the pin assemblies 210 at both ends of the C-shaped frame 200 are pulled out, and then the C-shaped frame 200 is rotated towards one end of the two support beams 100, so that the C-shaped frame 200 is rotated and stored at the end of the support beam 100, thereby realizing the storage of the drawing bracket, effectively reducing the space occupied by the drawing bracket, and at the same time facilitating the user to carry the drawing bracket.

[0054] As Figure 3 shown, in this embodiment, scale marks are provided on the outer sides of the scale plate 320 and the movable scale 321, and the scale marks facilitate the user to draw lines of appropriate lengths when drawing lines.

[0055] Embodiment 2, on the basis of Embodiment 1, in order to synchronously clean the eraser crumbs on the paper surface during the drawing process with the aid of the clamp 300.

[0056] As Figure 1 、 Figure 8 and Figure 9 shown, in this embodiment, a notch is formed on the outer side of the guide rail 110. A brush 312 is fixed to the bottom surface of the movable plate 310. A V-shaped frame 510 is fixed inside the receiving box 500. A connecting shaft 511 is rotatably inserted in the middle of the V-shaped frame 510, and the connecting shaft 511 is inserted and fixed to the guide rail 110.

[0057] In this embodiment, when the movable plate 310 is rotated towards the backing plate 400, the brush 312 on the bottom surface of the movable plate 310 abuts against the front side of the intersection position between the guide rail 110 and the backing plate 400. During the movement of the moving fixture 300, the movable plate 310 will drive the brush 312 to slide at the intersection position between the backing plate 400 and the guide rail 110, so that the brush 312 can sweep the rubber chips converging between the guide rail 110 and the backing plate 400 from the backing plate 400 towards the end of the guide rail 110. A receiving box 500 can be installed at both ends or one end of the guide rail 110, so that the swept rubber chips can be collected inside the receiving box 500.

[0058] In this embodiment, the receiving box 500 is rotatably connected to the connecting shaft 511 through a V-shaped frame 510, and the connecting shaft 511 is inserted and fixed inside the jack reserved at the end of the guide rail 110. When the entire drawing bracket is tilted at different drawing angles, the receiving box 500 can rotate to the vertically balanced position under its own gravity, so that the receiving box 500 can be vertically arranged at the end of the guide rail 110 after the drawing bracket is adjusted at different tilt angles, and further make the opening of the receiving box 500 always face upwards, which is convenient for receiving the rubber chips cleaned along the guide rail 110.

[0059] Embodiment 3, on the basis of Embodiment 1, in order to make the connecting block 111 stably support the backing plate 400 by using the lever principle while using the fixture 300 to automatically press the paper on the surface of the backing plate 400.

[0060] As Figure 10 and Figure 11 shown, in this embodiment, a convex block 1111 is fixed on the outer side of the bottom of the connecting block 111. When the connecting block 111 rotates the guide rail 110 to the bottom surface of the backing plate 400, the bottom of the guide rail 110 can automatically press against the bottom edge of the paper, realizing the initial state of clamping and fixing the paper, and realizing using the convex block 1111 on the outer side of the connecting block 111 as the lever support point to make the connecting block 111 firmly press the guide rail 110 on the paper surface of the backing plate 400. At the same time, the convex block 1111 is rotatably arranged at one end of the support beam 100, and the convex block 1111 can stably support the entire inclined drawing bracket.

[0061] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0062] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A portable drawing stand, characterized in that: Including: There are two support beams (100), and a guide rail (110) is rotatably connected between the two support beams (100); A C-shaped frame (200) is rotatably connected to the two support beams (100), and a pin assembly (210) is movably inserted between the two ends of the C-shaped frame (200) and the support beams (100) at corresponding positions; A fixture (300) is arranged outside the guide rail (110). The fixture (300) includes a movable plate (310) slidably connected to the guide rail (110). A scale plate (320) is slidably mounted on the bottom surface of the movable plate (310). Two movable scales (321) are hinged to one side of the scale plate (320). A reed (330) is slidably mounted on the top of the scale plate (320). Two buckle pieces (331) are rotated at one end of the reed (330). A roller (332) is rotatably connected to the bottom surface of the reed (330); A backing plate (400) is arranged on the tops of the two support beams (100). The guide rail (110) is movably abutted against the bottom of the backing plate (400), and the scale plate (320) is movably pressed against the surface of the backing plate (400); A receiving box (500) is arranged at one end of the guide rail (110) for receiving eraser debris in drawing.

2. The portable drawing stand according to claim 1, characterized in that: A V-shaped frame (510) is fixed inside the receiving box (500). A connecting shaft (511) is rotatably inserted in the middle of the V-shaped frame (510), and the connecting shaft (511) is inserted and fixed to the guide rail (110).

3. The portable drawing stand according to claim 1, characterized in that: A third stud (324) is fixed to the bottom of the scale plate (320). The third stud (324) is rotatably inserted into the movable plate (310), and a collar (325) is screwed onto one end of the third stud (324).

4. The portable drawing stand according to claim 1, characterized in that: The buckle piece (331) is rotatably connected to the reed (330) through a rotating shaft, and a torsion spring is sleeved between the rotating shaft and the reed (330).

5. The portable drawing stand according to claim 1, characterized in that: Two limit posts (322) that are both slidably inserted into the reed (330) are fixed to the top of the scale plate (320), and a second stud (323) is screwed between the scale plate (320) and the reed (330).

6. The portable drawing stand according to claim 1, characterized in that: The pin assembly (210) includes a connecting rod (211). A first pin (212) and a second pin (213) are respectively fixed to both ends of the connecting rod (211). A first pin hole for movably inserting the first pin (212) is formed on the outside of the support beam (100). A plurality of second pin holes are formed at both ends of the C-shaped frame (200), and the second pin (213) is selectively inserted into the second pin hole at the corresponding position.

7. The portable drawing stand according to claim 1, characterized in that: Scale marks are provided on the outer sides of the scale plate (320) and the movable scale (321).

8. The portable drawing stand according to claim 1, characterized in that: An L-shaped block (120) is arranged close to one end of the support beam (100), and a first stud (121) is screwed between the L-shaped block (120) and the support beam (100).

9. The portable drawing stand according to claim 8, characterized in that: A support base (130) is fixed to the bottom of the support beam (100). A support shaft (131) is fixed to the top of the support base (130). Connecting blocks (111) respectively rotatably connected to the corresponding support shafts (131) are fixed to both ends of the guide rail (110).

10. The portable drawing stand according to claim 9, characterized in that: A notch is provided on the outer side of the guide rail (110), and a brush (312) is fixed on the bottom surface of the movable plate (310).

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