Economical drawing device

Abstract

The invention discloses an economic drawing device, and relates to the technical field of economic drawing devices.The economic drawing device comprises a mounting rack, a rotating rod is rotatably mounted on the inner wall of the mounting rack, a connecting frame is fixed to the outer wall of the rotating rod, a fixing sleeve is fixed to the inner side of the mounting rack, and a spring is fixed to the outer wall of the rotating rod; the side, away from the rotating rod, of the clockwork spring is fixed to the inner wall of the fixing sleeve, a connecting base is fixedly installed at the bottom of the mounting frame, a sliding block is slidably installed on the inner wall of the connecting frame, and a rotating column is rotatably installed at the bottom of the sliding block. According to the economic drawing device, when a fan-shaped statistical chart needs to be drawn, a clamping block and a clamping hole are matched, a sliding block is limited, so that a chalk block in a placing frame is fixed, a suction cup is adsorbed to a drawing board, and a mounting frame is rotated, so that a connecting frame and the chalk block can be driven to rotate; and fan-shaped drawing can be carried out.

Description

Technical Field

[0001] The invention relates to the technical field of economical drawing devices, in particular to an economical drawing device. Background Art

[0002] Economics is a discipline that studies the various economic activities and corresponding economic relations of human society at various stages of development, as well as the laws of their operation and development. When teaching economics, in order to analyze economic trends and quantitative trends, it is often necessary to draw two-dimensional graphs for analysis. The graphs are mainly bar graphs and fan graphs, which can express the teaching content more intuitively. Therefore, drawing is needed in the process of teaching economics.

[0003] The patent publication number is CN216268391U, which is a graphic drawing device for economics. The device includes a mounting frame and a mounting shell. The mounting shell is clamped in the mounting frame and connected to the mounting frame through a connecting shaft. A fixed shell is arranged in the mounting shell, and a chalk block is arranged in the fixed shell. A mounting ring is provided at the bottom of the mounting frame. A connecting disk is clamped in the mounting ring. A dial is arranged at the bottom of the connecting disk. The outer circumference of the dial is provided with a scale line. The bottom of the mounting frame is provided with an identification line. A suction cup is arranged at the bottom of the scale. A fixing component is arranged at one end of the mounting frame. When in use, the suction cup is adsorbed on the drawing board for simple fixing, so that one side of the chalk block contacts the drawing board. The handle is held with one hand to prevent the device from being displaced during drawing. The pie chart can be drawn by rotating the mounting shell. The pie chart can be accurately drawn by the cooperation of the identification line and the scale, so that the drawing of the pie chart is more efficient and accurate.

[0004] However, the above-mentioned drawing device can only draw a single pie chart when drawing. When a bar chart needs to be drawn, other tools need to be replaced to draw the bar chart, which makes it inconvenient to switch back and forth. When the staff carries it, they need to carry two sets of tools, which brings inconvenience to the staff. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an economical drawing device to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an economical drawing device, comprising a mounting frame, a rotating rod is rotatably mounted on the inner wall of the mounting frame, a connecting frame is fixed to the outer wall of the rotating rod, a fixing sleeve is fixed to the inner side of the mounting frame, a spring is fixed to the outer wall of the rotating rod, a side of the spring away from the rotating rod is fixed to the inner wall of the fixing sleeve, a connecting seat is fixedly mounted on the bottom of the mounting frame, a slider is slidably mounted on the inner wall of the connecting frame, a rotating column is rotatably mounted on the bottom of the slider, a mounting frame is fixed to the bottom of the rotating column, a moving plate is slidably mounted on the inner wall of the mounting frame, and the bottom of the moving plate A squeezing spring is fixed to the bottom of the squeezing spring, a placing frame is fixed to the bottom of the squeezing spring, a chalk block is attached to the inner wall of the placing frame, a clamping plate is slidably installed on the inner wall of the placing frame, a bolt is rotatably installed on the side wall of the clamping plate, the bolt passes through the placing frame and is threadedly connected at the penetration point, the mounting frame is provided with an adjustment component for convenient drawing, and a stabilizing component for stably supporting the mounting frame is provided on the mounting frame. When drawing work is required, the chalk block is placed in the placing frame and the bolt is rotated to drive the clamping plate to move, and the chalk block can be clamped by the clamping plate, so that the chalk block is fixed in the placing frame.

[0007] Among them, the adjustment component includes an L-shaped transmission block, a limit rod, a limit hole, a return spring, a connecting spring, a clamping block and a clamping hole; the L-shaped transmission block is slidably installed on the top of the slider, and the side wall of the L-shaped transmission block is fixed with a return spring, and the side of the return spring away from the L-shaped transmission block is fixed to the inner side of the slider, and the outer wall of the rotating column is provided with a limit hole, and the limit rod is fixed on the inner side of the L-shaped transmission block, and the outer wall of the limit rod is fitted with the inner wall of the limit hole, and the limit rod extends into the limit hole to limit the rotating column and fix the installation frame.

[0008] According to the above technical solution, a clamping block is slidably installed on the inner wall of the slider, one side of the clamping block is attached to the inner side of the connecting frame, a connecting spring is fixed to the other side of the clamping block, and the side of the connecting spring away from the clamping block is fixed to the inner wall of the slider, and a clamping hole is provided on the outer wall of the connecting frame. When the clamping block extends into the clamping hole provided on the outer wall of the connecting frame, the placement frame can be fixed.

[0009] According to the above technical solution, a threaded rod is rotatably installed on the inner side of the installation frame, and a threaded sleeve is threadedly connected to the outer wall of the threaded rod. The side of the threaded sleeve away from the threaded rod is fixed to the side wall of the movable plate. By rotating the threaded rod, the threaded sleeve can be moved on the threaded rod, so that the threaded sleeve can drive the movable plate to move and adjust the position of the chalk block.

[0010] According to the above technical solution, an L-shaped stopper is slidably installed on the side wall of the mounting frame, a transmission spring is fixed to the bottom of the L-shaped stopper, and the bottom of the transmission spring is fixed to the top of the mounting frame. By setting the L-shaped stopper, the connection frame can be limited so that the connection frame can be stored in the mounting frame.

[0011] According to the above technical solution, the stabilizing component includes a rotating disk, a suction cup, a circular disk, a through hole, an insert rod, an L-shaped transmission rod, a hinged rod, a semicircular ring, a connecting rod, a return spring and a piston plate; the rotating disk is rotatably installed at the bottom of the connecting seat, and a suction cup is fixed to the bottom of the rotating disk. By setting the suction cup, it can be stably adsorbed on the drawing board.

[0012] According to the above technical solution, the inner wall of the connecting seat is slidably connected to a piston plate, a connecting rod is fixed to the top of the piston plate, a semicircular ring is fixed to the top of the connecting rod, a return spring is fixed to the bottom of the semicircular ring, and the bottom of the return spring is fixed to the top of the connecting seat. By setting the return spring, the semicircular ring can be reset.

[0013] According to the above technical solution, an L-shaped transmission rod passes through the middle of the mounting frame and is slidably connected at the penetration point. A hinged rod is hinged at the bottom of the L-shaped transmission rod, and one end of the hinged rod away from the L-shaped transmission rod is hinged to the outer wall of the semicircular ring.

[0014] According to the above technical solution, a disc is slidably mounted on the outer wall of the connecting seat, and an insertion rod is fixed on the outer wall of the rotating disk.

[0015] The present invention provides an economical drawing device having the following beneficial effects:

[0016] (1) According to the present invention, when it is necessary to draw a sector chart, the slider is limited by the cooperation of the card block and the card hole, so that the chalk block in the placement frame is fixed, and the suction cup is adsorbed on the drawing board and the mounting frame is rotated, so that the connecting frame and the chalk block can be driven to rotate, so that sector drawing can be carried out; when it is necessary to draw a bar chart, the two sets of L-shaped transmission blocks are pushed to move the limit rod out of the limit hole, so as to release the limit on the rotating column, rotate the rotating column, and rotate the mounting frame. When the mounting frame is rotated to a vertical state with the connecting frame, the L-shaped transmission block is loosened to allow the limit rod to extend into the limit hole to fix the rotating column and the mounting frame, so that the slider is moved in the connecting frame to carry out the bar drawing operation, so that both sector and bar graphics can be drawn, which is convenient for the staff to operate and improves practicality.

[0017] (2) The present invention can reverse the threaded rod so that the threaded rod drives the threaded sleeve to move downward, and the threaded sleeve drives the movable plate to move downward, so that the movable plate drives the extrusion spring to move downward, and drives the placement frame to move downward, so that the chalk block can be moved out of the installation frame, which is convenient for the use of the chalk block, prevents the chalk block from being worn out and broken during use, and prevents the chalk from coming into close contact with the drawing board when drawing.

[0018] (3) According to the present invention, when the connecting frame is unfolded to use the device, the connecting frame will not squeeze the L-shaped transmission rod, and through the cooperation of the hinge rod, the semicircular ring, the connecting rod and the return spring, the connecting rod can drive the piston plate to move upward, so that the piston plate can suck out the air in the suction cup, so that after the air inside the suction cup is sucked out, negative pressure is formed, and the external atmospheric pressure presses the suction cup tightly against the surface of the drawing board, generating suction, so that the mounting frame is more stably fixed on the drawing board, preventing the mounting frame from falling when drawing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure of A;

[0022] Figure 4 It is a partial structural schematic diagram of the present invention;

[0023] Figure 5 For the present invention Figure 4 A large schematic diagram of the B structure;

[0024] Figure 6 It is a schematic diagram of the local structure of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the C structure;

[0026] Figure 8 It is a schematic diagram of the structure of the connection frame part of the present invention;

[0027] Fig. 9 It is a schematic diagram of a partial cross-sectional structure of the mounting frame of the present invention;

[0028] Fig.10 It is a schematic diagram of the structure of the mounting frame of the present invention;

[0029] Fig.11 It is a schematic diagram of the cross-sectional structure of the mounting frame of the present invention.

[0030] In the figure: 1, mounting frame; 2, rotating rod; 3, connecting frame; 4, fixing sleeve; 5, clockwork; 6, slider; 7, rotating column; 8, mounting frame; 9, moving plate; 10, extrusion spring; 11, placing frame; 12, chalk block; 13, pressing plate; 14, bolt; 15, threaded rod; 16, threaded sleeve; 17, L-shaped block; 18, transmission spring; 191, L-shaped transmission block; 192, return spring; 193, limiting hole; 194, limiting rod; 195, connecting spring; 196, clamping block; 197, clamping hole; 20, connecting seat; 211, rotating disk; 212, suction cup; 213, disc; 214, through hole; 215, plug rod; 216, L-shaped transmission rod; 217, semicircular ring; 218, hinged rod; 219, connecting rod; 220, return spring; 221, piston plate. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-Figure 11An embodiment of the present invention is: an economical drawing device, comprising a mounting frame 1, a rotating rod 2 is rotatably mounted on the inner wall of the mounting frame 1, a connecting frame 3 is fixed to the outer wall of the rotating rod 2, a fixing sleeve 4 is fixed to the inner side of the mounting frame 1, a spring 5 is fixed to the outer wall of the rotating rod 2, and the side of the spring 5 away from the rotating rod 2 is fixed to the inner wall of the fixing sleeve 4, a connecting seat 20 is fixedly mounted on the bottom of the mounting frame 1, a slider 6 is slidably mounted on the inner wall of the connecting frame 3, and the slider 6 can slide left and right on the inner wall of the connecting frame 3, a rotating column 7 is rotatably mounted on the bottom of the slider 6, a mounting frame 8 is fixed to the bottom of the rotating column 7, a moving plate 9 is slidably mounted on the inner wall of the mounting frame 8, and the moving plate 9 can slide on the inner wall of the mounting frame 8 The inner wall moves up and down, and an extrusion spring 10 is fixed at the bottom of the moving plate 9. A placement frame 11 is fixed at the bottom of the extrusion spring 10. The placement frame 11 is slidably installed on the inner wall of the installation frame 8 and can slide up and down. A chalk block 12 is attached to the inner wall of the placement frame 11. A clamping plate 13 is slidably installed on the inner wall of the placement frame 11. Bolts 14 are rotatably installed on the side wall of the clamping plate 13. The bolts 14 penetrate the placement frame 11 and are threadedly connected at the penetration. When the chalk block 12 needs to be installed, the chalk block 12 can be placed in the placement frame 11 so that the chalk block 12 fits the inner wall of the placement frame 11. The clamping plate 13 can be driven to move toward the chalk block 12 by rotating the bolts 14 forward. The chalk block 12 can be pressed and fixed by the clamping plate 13, and the mounting frame 8 is provided with an adjustment component for convenient drawing; wherein the adjustment component comprises an L-shaped transmission block 191, a limiting rod 194, a limiting hole 193, a return spring 192, a connecting spring 195, a clamping block 196 and a clamping hole 197; the L-shaped transmission block 191 is slidably mounted on the top of the slider 6, a return spring 192 is fixed to the side wall of the L-shaped transmission block 191, and the side of the return spring 192 away from the L-shaped transmission block 191 is fixed to the inner side of the slider 6, a limiting hole 193 is provided on the outer wall of the rotating column 7, a limiting rod 194 is fixed to the inner side of the L-shaped transmission block 191, and the outer wall of the limiting rod 194 and the limiting hole 193 are connected. The inner wall of the slider 6 is fitted with a block 196, and the inner wall of the slider 6 is slidably installed with a block 196. One side of the block 196 is fitted with the inner side of the connecting frame 3, and a connecting spring 195 is fixed to the other side of the block 196. The side of the connecting spring 195 away from the block 196 is fixed to the inner wall of the slider 6. A card hole 197 is provided on the outer wall of the connecting frame 3. A threaded rod 15 is rotatably installed on the inner side of the mounting frame 8. The outer wall of the threaded rod 15 is threadedly connected with a threaded sleeve 16, and the side of the threaded sleeve 16 away from the threaded rod 15 is fixed to the side wall of the movable plate 9. An L-shaped stopper 17 is slidably installed on the side wall of the mounting frame 1, and a transmission spring 18 is fixed to the bottom of the L-shaped stopper 17, and the bottom of the transmission spring 18 is fixed to the top of the mounting frame 1.

[0033] When it is necessary to draw a sector chart, the slider 6 is limited by the cooperation of the clamping block 196 and the clamping hole 197, so that the chalk block 12 in the placement frame 11 is fixed, and the suction cup 212 is adsorbed on the drawing board and the mounting frame 1 is rotated, so that the connecting frame 3 and the chalk block 12 can be driven to rotate, so that sector drawing can be carried out; when it is necessary to draw a bar chart, the two sets of L-shaped transmission blocks 191 are pushed to move the limiting rod 194 out of the limiting hole 193, so as to release the limit on the rotating column 7, rotate the rotating column 7, and rotate the mounting frame 8. When the mounting frame 8 is rotated to a vertical state with the connecting frame 3, the L-shaped transmission block 191 is loosened, so that the limiting rod 194 extends into the limiting hole 193, and the rotating column 7 and the mounting frame 8 are fixed, so that the slider 6 is moved in the connecting frame 3, and the bar drawing operation can be carried out, so that it is convenient to draw both sector and bar graphics, which is convenient for the staff to operate and improves the practicality.

[0034] By reversing the threaded rod 15, the threaded rod 15 can drive the threaded sleeve 16 to move downward, and the threaded sleeve 16 can drive the movable plate 9 to move downward, so that the movable plate 9 drives the extrusion spring 10 to move downward, and drives the placement frame 11 to move downward, so that the chalk block 12 can be moved out of the installation frame 8, which is convenient for the use of the chalk block 12, prevents the chalk block 12 from being worn out and broken during use, and prevents the chalk from coming into close contact with the drawing board when drawing.

[0035] When the present embodiment is working: when the device needs to be used, the chalk block 12 is first placed in the placement frame 11, and the bolt 14 is rotated to drive the clamping plate 13 to move, and the chalk block 12 can be clamped and fixed by the clamping plate 13. After the chalk block 12 is installed, the suction cup 212 is adsorbed on the drawing board, and the slider 6 is moved to align the block 196 with the clamping hole 197. Because the connecting spring 195 is in a compressed state, the connecting spring 195 can drive the clamping block 196 to extend into the clamping hole 197, so that the slider 6 can be fixed, and the connecting frame 3 is driven to move by rotating the mounting frame 1. The connecting frame 3 drives the chalk block 12 to move on the pressing plate 13, and the pressing plate 13 drives the chalk block 12 to rotate on the drawing board to draw a sector chart. If a bar chart needs to be drawn, the two sets of L-shaped transmission blocks 191 are pulled away from each other to stretch the reset spring 192, so that the L-shaped transmission block 191 can drive the limit rod 194 to move out of the limit hole 193, thereby releasing the limit on the rotating column 7. By rotating the rotating column 7, the rotating column 7 drives the installation frame 8 to rotate. When the installation frame 8 is rotated to a vertical state with the connecting frame 3, the L-shaped transmission block 191 is released because the reset spring 192 is in a stretched state. Thereby, the L-shaped transmission block 191 can drive the limiting rod 194 to extend into the limiting hole 193, so that the rotating column 7 can be fixed, so that the connection frame 3 is horizontally adsorbed on the drawing board through the suction cup 212, and the slider 6 is moved in the connection frame 3. If the block 196 is in the hole 197, when the slider 6 is moved in the connection frame 3, the arc surface of the block 196 will be squeezed against the inner wall of the hole 197, so that the block 196 will be subjected to the squeezing force, so that the block 196 moves into the slider 6, the connecting spring 195 is compressed, so that the block 196 is against the inner wall of the connection frame 3, and the slider 6 is moved in the connection frame 3. 6 is moved, so that a bar graph is drawn by the chalk block 12. When the chalk block 12 is severely worn or broken during use, the threaded rod 15 is reversed, so that the threaded rod 15 drives the threaded sleeve 16 to move downward, so that the threaded sleeve 16 can drive the moving plate 9 to move downward. When the moving plate 9 moves downward, the extrusion spring 10 can be driven to move downward. When the extrusion spring 10 moves downward, the placement frame 11 can be driven to move downward, so that the chalk block 12 can move outside the installation frame 8, so that the chalk block 12 can be in close contact with the drawing board when drawing, and through the cooperation of the extrusion spring 10, the chalk block 12 can always be against the outer wall of the drawing board.

[0036] See also Figure 1-Figure 11On the basis of the above embodiment, in another embodiment of the present invention, a stabilizing component for stably supporting the mounting frame 1 is provided on the mounting frame 1, and the stabilizing component includes a rotating disk 211, a suction cup 212, a disc 213, a through hole 214, an insertion rod 215, an L-shaped transmission rod 216, a hinge rod 218, a semicircular ring 217, a connecting rod 219, a return spring 220 and a piston plate 221; the rotating disk 211 is rotatably mounted on the bottom of the connecting seat 20, the suction cup 212 is fixed to the bottom of the rotating disk 211, the inner wall of the connecting seat 20 is slidably connected to the piston plate 221, and the top of the piston plate 221 is fixed to the connecting rod 21 9. The connecting rod 219 passes through the top of the connecting seat 20 and is slidably connected at the penetration point. A semicircular ring 217 is fixed on the top of the connecting rod 219, and a return spring 220 is fixed on the bottom of the semicircular ring 217. The bottom of the return spring 220 is fixed to the top of the connecting seat 20. An L-shaped transmission rod 216 passes through the middle of the mounting frame 1 and is slidably connected at the penetration point. A hinged rod 218 is hinged at the bottom of the L-shaped transmission rod 216, and one end of the hinged rod 218 away from the L-shaped transmission rod 216 is hinged to the outer wall of the semicircular ring 217. A disc 213 is slidably installed on the outer wall of the connecting seat 20, and an insertion rod 215 is fixed to the outer wall of the rotating disk 211.

[0037] When the connecting frame 3 is unfolded to use the equipment, the connecting frame 3 will not squeeze the L-shaped transmission rod 216, and through the cooperation of the hinge rod 218, the semicircular ring 217, the connecting rod 219 and the return spring 220, the connecting rod 219 can drive the piston plate 221 to move upward, so that the piston plate 221 can suck out the air in the suction cup 212, so that after the air inside the suction cup 212 is sucked out, negative pressure is formed, and the external atmospheric pressure presses the suction cup 212 tightly against the surface of the drawing board, generating suction, so that the mounting frame 1 is more stably fixed on the drawing board, preventing the mounting frame 1 from falling when drawing.

[0038] When drawing a bar chart, the disc 213 can be moved so that the through hole 214 on the disc 213 is placed on the insertion rod 215, thereby fixing the disc 213. When drawing the bar chart, the disc 213 cannot rotate, so the connecting seat 20 cannot rotate either, to prevent the mounting frame 1 from driving the connecting frame 3 to rotate when drawing the bar chart, which would cause the bars of the bar chart to bend and affect viewing.

[0039] When the present embodiment is working: when the suction cup 212 is adsorbed on the drawing board, the L-shaped stopper 17 is moved to release the blocking limit of the connecting frame 3. Since the spring 5 is in a contracted state, the spring 5 can drive the rotating rod 2 to rotate, so that the connecting frame 3 is away from the mounting frame 1. When the connecting frame 3 is away from the mounting frame 1, since the connecting frame 3 does not squeeze the L-shaped transmission rod 216, the return spring 220 is in a compressed state, so that the return spring 220 can drive the connecting rod 219 to move upward. Thereby, the piston plate 221 is driven to move upward. When the piston plate 221 moves upward, the air in the suction cup 212 can be sucked out through the piston plate 221, so that the suction cup 212 is stably adsorbed on the drawing board. When the device is not in use, the connecting frame 3 is rotated toward the mounting frame 1. When the connecting frame 3 is rotated to the end, the inclined surface of the L-shaped stopper 17 is squeezed. When the inclined surface of the L-shaped stopper 17 is subjected to the squeezing force, the L-shaped stopper 17 is moved away from the suction cup 212, driving the transmission spring 18 to stretch. When the frame 3 moves to the inside of the mounting frame 1, because the L-shaped stopper 17 is not subjected to the extrusion force, the transmission spring 18 is in a stretched state, so that the transmission spring 18 can drive the L-shaped stopper 17 to reset, so that the L-shaped stopper 17 blocks the connection frame 3, so that the connection frame 3 is fixed in the mounting frame 1, and when the connection frame 3 moves into the mounting frame 1, the connection frame 3 will squeeze the L-shaped transmission rod 216, so that the L-shaped transmission rod 216 moves out of the mounting frame 1, so that the L-shaped transmission rod 216 can press the hinge rod 218. The articulated rod 218 is squeezed to rotate at the hinge, so that the articulated rod 218 can squeeze the semicircular ring 217 to approach the connecting seat 20, compressing the return spring 220, and when the semicircular ring 217 moves, the connecting rod 219 can drive the piston plate 221 to move in the connecting seat 20, so that the piston plate 221 can inject the air in the connecting seat 20 into the suction cup 212. The injected air makes the air pressure inside and outside the suction cup 212 tend to balance, and the suction cup 212 is no longer pressed by the external atmospheric pressure, and the adsorption effect is released.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An economical plotting device, comprising a mounting frame (1), characterized in that: A rotating rod (2) is rotatably mounted on the inner wall of the mounting frame (1), a connecting frame (3) is fixed on the outer wall of the rotating rod (2), a fixing sleeve (4) is fixed on the inner side of the mounting frame (1), a spring (5) is fixed on the outer wall of the rotating rod (2), a side of the spring (5) away from the rotating rod (2) is fixed to the inner wall of the fixing sleeve (4), a connecting seat (20) is fixedly mounted on the bottom of the mounting frame (1), a slider (6) is slidably mounted on the inner wall of the connecting frame (3), a rotating column (7) is rotatably mounted on the bottom of the slider (6), a mounting frame (8) is fixed on the bottom of the rotating column (7), and the mounting frame (8) A movable plate (9) is slidably mounted on the inner wall of the movable plate (9), a pressing spring (10) is fixed at the bottom of the movable plate (9), a placement frame (11) is fixed at the bottom of the pressing spring (10), a chalk block (12) is attached to the inner wall of the placement frame (11), a clamping plate (13) is slidably mounted on the inner wall of the placement frame (11), a bolt (14) is rotatably mounted on the side wall of the clamping plate (13), the bolt (14) passes through the placement frame (11) and is threadedly connected at the penetration point, the installation frame (8) is provided with an adjustment component for facilitating drawing, and a stabilizing component for stably supporting the installation frame (1) is provided on the installation frame (1); The adjustment component comprises an L-shaped transmission block (191), a limiting rod (194), a limiting hole (193), a return spring (192), a connecting spring (195), a clamping block (196) and a clamping hole (197); the L-shaped transmission block (191) is slidably mounted on the top of the slider (6); a return spring (192) is fixed to the side wall of the L-shaped transmission block (191); a side of the return spring (192) away from the L-shaped transmission block (191) is fixed to the inner side of the slider (6); an outer wall of the rotating column (7) is provided with a limiting hole (193); a limiting rod (194) is fixed to the inner side of the L-shaped transmission block (191); and the outer wall of the limiting rod (194) is in contact with the inner wall of the limiting hole (193).

2. An economical plotting device according to claim 1, characterized in that: A clamping block (196) is slidably mounted on the inner wall of the slider (6); one side of the clamping block (196) is in contact with the inner side of the connection frame (3); a connection spring (195) is fixed to the other side of the clamping block (196); a side of the connection spring (195) away from the clamping block (196) is fixed to the inner wall of the slider (6); and a clamping hole (197) is provided on the outer wall of the connection frame (3).

3. An economical plotting device according to claim 1, characterized in that: A threaded rod (15) is rotatably mounted on the inner side of the mounting frame (8), a threaded sleeve (16) is threadedly connected to the outer wall of the threaded rod (15), and the side of the threaded sleeve (16) away from the threaded rod (15) is fixed to the side wall of the movable plate (9).

4. An economical plotting device according to claim 1, characterized in that: An L-shaped stopper (17) is slidably mounted on the side wall of the mounting frame (1), a transmission spring (18) is fixed to the bottom of the L-shaped stopper (17), and the bottom of the transmission spring (18) is fixed to the top of the mounting frame (1).

5. An economical plotting device according to claim 1, characterized in that: The stabilizing assembly comprises a rotating disk (211), a suction cup (212), a circular disk (213), a through hole (214), an insertion rod (215), an L-shaped transmission rod (216), a hinge rod (218), a semicircular ring (217), a connecting rod (219), a return spring (220) and a piston plate (221); the rotating disk (211) is rotatably mounted on the bottom of the connecting seat (20), and the suction cup (212) is fixed to the bottom of the rotating disk (211).

6. An economical plotting device according to claim 5, characterized in that: The inner wall of the connecting seat (20) is slidably connected to a piston plate (221), a connecting rod (219) is fixed to the top of the piston plate (221), a semicircular ring (217) is fixed to the top of the connecting rod (219), a return spring (220) is fixed to the bottom of the semicircular ring (217), and the bottom of the return spring (220) is fixed to the top of the connecting seat (20).

7. An economical plotting device according to claim 6, characterized in that: An L-shaped transmission rod (216) passes through the middle of the mounting frame (1), and the penetration point is slidably connected. A hinge rod (218) is hinged at the bottom of the L-shaped transmission rod (216), and one end of the hinge rod (218) away from the L-shaped transmission rod (216) is hinged to the outer wall of the semicircular ring (217).

8. An economical plotting device according to claim 7, characterized in that: A circular disc (213) is slidably mounted on the outer wall of the connecting seat (20), and an inserting rod (215) is fixed on the outer wall of the rotating disc (211).

Images