A surveying and mapping device for on-site inspection based on territorial spatial planning

Abstract

The present invention relates to the technical field of surveying and mapping supports, and in particular to a surveying and mapping device for field investigation based on national land space planning, comprising a stand, the lower surface of which is rotatably connected with three support legs, the upper surface of which is fixedly mounted with a surveying instrument, a slider is slidably inserted into the lower port of the support leg, an hourglass-shaped groove is provided on the inner side of the slider, a swing rod is rotatably penetrated on the inner side of the hourglass-shaped groove, a corner block is fixedly connected to the lower end of the swing rod, a groove is provided on the upper end surface of the swing rod, and a moving handle is movably connected to the inner side of the groove through an elastic mechanism. The present invention allows the corner block that swings back and forth to push away the grass layer to ensure that it can be inserted into the ground, and the grass layer will not be pressed after insertion, which can effectively avoid the problem of unstable arrangement caused by the grass layer bouncing up, and also has a protective function to prevent the sharp corner block from stabbing the user.

Description

Technical Field

[0001] The present invention relates to the technical field of surveying and mapping brackets, and particularly relates to a surveying and mapping device for on-site investigation based on territorial spatial planning. Background Art

[0002] The main purpose of on-site investigation of territorial spatial planning is to comprehensively understand and evaluate the current situation, implementation effect and existing problems of territorial spatial planning in the planning area. Through on-site investigation, first-hand information can be obtained, providing a scientific basis for planning compilation, approval and management. At the same time, it also helps to promote the implementation and supervision of the planning. Territorial planning surveying and mapping is a comprehensive task that involves the measurement, surveying and mapping of territorial space, aiming to obtain information on the geometry, shape, position, size, distribution and attributes of the earth's surface and its appendages. During the surveying and mapping process, the ground conditions at the surveying and mapping points are relatively complex.

[0003] When arranging the tripod and the surveying instrument on the ground with a thick grass layer, it is rather inconvenient. Due to the thick grass layer, when the bottom of the tripod is inserted into the ground, the root parts of the grass in the grass layer are easily inserted into the ground together. After that, the roots have a tendency to recover, which will cause the bottom of the tripod to be lifted, resulting in problems such as unstable arrangement and easy skewing, thus affecting the normal operation of the surveying instrument and greatly reducing the surveying accuracy.

[0004] In addition, in order to ensure stability when the tripod of the surveying instrument is inserted into the ground, the lower end is sharpened, which is likely to cause accidental injury problems during handling, especially when moving in the wild. The user is prone to standing unsteadily, and the exposed sharp part is likely to pose a danger. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the background art, and to propose a surveying and mapping device for on-site investigation based on territorial spatial planning.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: A surveying and mapping device for on-site investigation based on territorial spatial planning, including a frame base. The lower surface of the frame base is rotatably connected with three support legs. The upper surface of the frame base is fixedly installed with a surveying instrument. A slider is slidably inserted into the lower port of the support leg. An hourglass-shaped groove is formed inside the slider. A swing rod is rotatably penetrated through the inside of the hourglass-shaped groove. The lower end of the swing rod is fixedly connected with an angle block. A groove is formed on the upper end surface of the swing rod. A moving handle is movably connected to the inside of the groove through an elastic mechanism. Sliding openings are respectively formed on the mutually remote sides of the three support legs and near the lower ends. The moving handle passes through the sliding opening and is fixedly connected with a pedal. An arc-shaped frame is inserted through the edge of the pedal by a locking mechanism. Two convex blocks respectively extend from the two corners of the pedal close to the support leg. Abuttment mechanisms for contacting the surface of the support leg are respectively arranged on the mutually close sides of the two convex blocks;

[0007] The pedal is pressed by the foot, the moving handle moves outward and rotates downward relative to the swing rod, and then the abutting mechanism no longer contacts the support leg;

[0008] After the arc-shaped frame slides upward relative to the pedal, when the foot presses on the upper surface of the pedal, it is prevented from detaching;

[0009] After the arc-shaped frame slides downward relative to the pedal, the lower end of the angle block is located inside the arc-shaped frame.

[0010] Preferably, the upper end of the support leg is fixedly connected with a rotating block, the upper end of the rotating block is rotatably embedded in the lower surface of the frame seat, a connecting bolt is rotatably penetrated through the side surface of the frame seat corresponding to each rotating block, a connecting nut is threadedly sleeved at one end of the connecting bolt, and the connecting bolt is fixedly penetrated through the inside of the rotating block.

[0011] Preferably, rotating shafts are respectively fixedly connected to the two side surfaces of the swing rod and corresponding to the inside of the hourglass-shaped groove, and the rotating shafts are rotatably embedded in the inner wall of the hourglass-shaped groove.

[0012] Preferably, the elastic mechanism includes a sliding shaft fixedly connected to one end of the moving handle, side grooves are respectively opened on the two side walls of the groove, both ends of the sliding shaft are respectively slidably clamped inside the side grooves, a limiting block is slidably clamped inside the side grooves, the limiting block is in sliding contact with the surface of the sliding shaft, a compression spring is fixedly connected to one side of the limiting block away from the limiting block, and one end of the compression spring is fixed to the inner wall of the side groove.

[0013] Preferably, the locking mechanism includes two guide grooves opened on the edge of the pedal, a dial is arranged at the end of the pedal through a pulling mechanism, two insertion rods are fixedly connected to one side surface of the dial, the insertion rods slide through the pedal and extend to the inside of the guide grooves, both sides of the arc-shaped frame respectively slide through the inside of the guide grooves, limiting holes are respectively opened on the outer surface of the arc-shaped frame near the upper and lower ends, and each insertion rod slides and inserts into the inside of one of the limiting holes.

[0014] Preferably, the pulling mechanism includes a fixed cylinder fixedly connected to the lower surface of the pedal, a sliding column is slidably inserted into one side of the fixed cylinder, one end of the sliding column is fixedly connected to the surface of the dial, the other end of the sliding column is fixedly connected to a limiting disk, the limiting disk is in sliding contact with the inner wall of the fixed cylinder, a return spring is sleeved on the outer surface of the sliding column, and the return spring is located inside the fixed cylinder.

[0015] Preferably, a trapezoidal bayonet is opened at the upper end of the arc-shaped frame, the trapezoidal bayonet is sleeved on the outer surface of the support leg, and smooth parts are respectively arranged at the two lower ends of the arc-shaped frame.

[0016] Preferably, the abutment mechanism includes an L-shaped block arranged at the end of the protrusion, a T-shaped column is fixedly connected to the inner side of the L-shaped block, the T-shaped column slides through the side surface of the protrusion, a pressure spring is sleeved on the outer surface of the T-shaped column, and the pressure spring is located between the inner wall of the L-shaped block and the side surface of the protrusion, the L-shaped block is provided with an inclined guide surface near the corner of the bracket leg, a friction plate is fixedly connected to the corner of the outer surface of the bracket leg, and one side of the L-shaped block is in contact with the friction plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the invention, the user's feet move back and forth to step on the pedal to drive the swing rod to swing back and forth around the rotation axis. The swinging corner block pushes the grass layer away to ensure that it can be inserted into the ground, and the grass layer will not be pressed after insertion, which can effectively avoid the problem of unstable layout caused by the grass layer bouncing up;

[0019] 2. After the corner block is pressed down and inserted into the ground, the foot is released and then lifted up to hook up the arc frame to move the pedal upward. Under the action of the compression spring, the limit block pushes the sliding shaft to reset and move. Under the guidance of the inclined guide surface, the L-shaped blocks on both sides are smoothly clamped on the two sides of the bracket leg. With the action of the friction plate and the elastic force of the pressure spring, a large friction force is generated between the friction plate and the L-shaped block to ensure that the pedal is stably limited, that is, the corner block, the swing rod and other structures are positioned to form a stable support on the ground; at the same time, during the lifting process, the trapezoidal bayonet will be correspondingly sleeved on the surface of the bracket leg, further improving the stability of the pedal. The positioning can be completed by lifting the pedal, thereby maintaining the stability of the corner block and convenient operation.

[0020] 3. When the present invention is folded up for transportation, the dial plate is pulled to make the insertion rod disengage from the inner side of the limiting hole, and then the arc frame is pressed down so that the lower end of the arc frame is sleeved on the outer periphery of the lower end of the corner block to play a protective role. Then, the user lets go and, under the action of the reset spring, the limit plate is pushed to reset the sliding column. After the insertion rod is inserted into another limiting hole, the arc frame is kept stably positioned. Therefore, the arc frame has a protective function to prevent the sharp corner block from injuring the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a surveying and mapping device for field investigation based on national land space planning according to the present invention;

[0022] Figure 2 The present invention is a surveying and mapping device for field investigation based on national land space planning Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic diagram of the lower end of the support leg of a surveying and mapping device for field investigation based on national land space planning according to the present invention;

[0024] Figure 4 This is a partial cross-sectional view of the support leg of a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention;

[0025] Figure 5 For a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention Figure 4 Enlarged view at position B in;

[0026] Figure 6 This is a cross-sectional view at the slider of a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention;

[0027] Figure 7 For a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention Figure 6 Enlarged view at position C in;

[0028] Figure 8 This is a schematic diagram of the sliding port of a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention;

[0029] Figure 9 This is a schematic diagram of the pedal of a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention;

[0030] Figure 10 This is a state diagram of the support leg during storage of a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention;

[0031] Figure 11 This is a state diagram of the support leg during stepping on of a surveying and mapping device for on-site inspection based on national territorial space planning of the present invention.

[0032] 1. Bracket leg; 2. Bracket base; 3. Surveying instrument; 4. Rotating block; 5. Connecting bolt; 6. Connecting nut; 7. Slider; 8. Hourglass-shaped groove; 9. Swing rod; 10. Rotating shaft; 11. Groove; 12. Moving handle; 13. Sliding shaft; 14. Side groove; 15. Limiting block; 16. Compression spring; 17. Pedal; 18. Arc-shaped bracket; 19. Trapezoidal bayonet; 20. Limiting hole; 21. Smooth part; 22. Guide groove; 23. Insert rod; 24. Dial plate; 25. Fixed cylinder; 26. Sliding column; 27. Return spring; 28. Limiting disc; 29. Convex block; 30. L-shaped block; 31. Inclined guide surface; 32. T-shaped column; 33. Pressing spring; 34. Sliding port; 35. Angle block; 36. Friction plate. Detailed implementation manners

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and other obvious variations can be conceived by those skilled in the art.

[0034] As Figures 1-11 shown, a surveying and mapping device for on-site inspection based on territorial spatial planning includes a pedestal 2. Three support legs 1 are rotatably connected to the lower surface of the pedestal 2. A surveying instrument 3 is fixedly installed on the upper surface of the pedestal 2. A slider 7 is slidably inserted into the lower port of the support leg 1. An hourglass-shaped groove 8 is formed inside the slider 7. A swing rod 9 rotatably penetrates through the inside of the hourglass-shaped groove 8. A corner block 35 is fixedly connected to the lower end of the swing rod 9. A groove 11 is formed on the upper end surface of the swing rod 9. A moving handle 12 is movably connected to the inside of the groove 11 through an elastic mechanism. Slide openings 34 are respectively formed on the mutually remote sides of the three support legs 1 and near the lower ends. The moving handle 12 passes through the slide openings 34 and is fixedly connected to a pedal 17. An arc-shaped frame 18 is inserted into the pedal 17 through a locking mechanism at the edge of the pedal 17. Two protrusions 29 respectively extend from two corners of the pedal 17 close to the support leg 1. An abutting mechanism for contacting the surface of the support leg 1 is respectively arranged on the mutually close sides of the two protrusions 29;

[0035] The length of the moving handle 12 is designed to meet the following conditions: when the pedal 17 is pressed by the user's foot, the moving handle 12 moves outward and rotates downward relative to the swing rod 9, and then the abutting mechanism no longer contacts the support leg 1;

[0036] After the arc-shaped frame 18 slides upward relative to the pedal 17, the state is as Figure 3 shown. At this time, when the user's foot presses on the upper surface of the pedal 17, it can prevent detachment;

[0037] When the arc-shaped frame 18 slides downward relative to the pedal 17, the lower end of the corner block 35 is located inside the arc-shaped frame 18, and the state is as Figure 10 shown. At this time, the lower end of the corner block 35 is protected to prevent stabbing the user.

[0038] As Figure 1 、 Figure 2 shown, a rotating block 4 is fixedly connected to the upper end of the support leg 1. The upper end of the rotating block 4 is rotatably embedded in the lower surface of the pedestal 2. A connecting bolt 5 rotatably penetrates through the side surface of the pedestal 2 corresponding to each rotating block 4. A connecting nut 6 is threadedly sleeved at one end of the connecting bolt 5, and the connecting bolt 5 fixedly passes through the inside of the rotating block 4. By loosening the connecting nut 6, the support leg 1 can be rotated relative to the pedestal 2. By tightening the connecting nut 6, the stability of the support leg 1 can be ensured, and the three support legs 1 can be adjusted respectively according to the inclination degree of the ground to ensure that the surveying instrument 3 remains horizontal.

[0039] As Figure 6 shown, rotating shafts 10 are respectively fixedly connected to the two side surfaces of the swing rod 9 and corresponding to the inside of the hourglass-shaped groove 8. The rotating shafts 10 are rotatably embedded in the inner wall of the hourglass-shaped groove 8. The design of the hourglass-shaped groove 8 can limit the swing amplitude of the swing rod 9.

[0040] AsFigure 4 , Figure 5 , Figure 6 , Figure 7 As shown in Figure 4 , Figure 5 , Figure 6 , and Figure 7 , the elastic mechanism includes a sliding shaft 13 fixedly connected to one end of the moving handle 12. Side grooves 14 are respectively formed on both side walls of the groove 11. Both ends of the sliding shaft 13 are respectively slidably inserted into the inner sides of the side grooves 14. A limiting block 15 is slidably inserted into the inner side of the side groove 14. The limiting block 15 is in sliding contact with the surface of the sliding shaft 13. A compression spring 16 is fixedly connected to the side of the limiting block 15 away from the limiting block 15, and one end of the compression spring 16 is fixed to the inner wall of the side groove 14. This design enables the moving handle 12 to move and rotate relative to the upper end of the swing rod 9. Obviously, the inner height of the groove 11 should not be too high to prevent the moving handle 12 from rotating too much downward, thus avoiding the problem of the edge of the pedal 17 hitting the support leg 1.

[0041] As Figure 9 , Figure 10 shown in Figure 9 and Figure 10 , the locking mechanism includes two guide grooves 22 formed on the edge of the pedal 17. A dial 24 is arranged at the end of the pedal 17 through a pulling mechanism. Two insertion rods 23 are fixedly connected to one side surface of the dial 24. The insertion rods 23 slide through the pedal 17 and extend into the inner sides of the guide grooves 22. Both sides of the arc-shaped frame 18 respectively slide through the inner sides of the guide grooves 22. Positioning holes 20 are respectively formed on the outer surface of the arc-shaped frame 18 near the upper and lower ends. Each insertion rod 23 is slidably inserted into the inner side of one of the positioning holes 20. Positioning of the arc-shaped frame 18 at two positions is achieved.

[0042] The pulling mechanism includes a fixed cylinder 25 fixedly connected to the lower surface of the pedal 17. A sliding column 26 is slidably inserted into one side of the fixed cylinder 25. One end of the sliding column 26 is fixedly connected to the surface of the dial 24. The other end of the sliding column 26 is fixedly connected to a limiting disc 28. The limiting disc 28 is in sliding contact with the inner wall of the fixed cylinder 25. A return spring 27 is sleeved on the outer surface of the sliding column 26, and the return spring 27 is located inside the fixed cylinder 25. When the dial 24 is pulled, the return spring 27 will be compressed. After releasing the hand, under the elastic force of the return spring 27, the insertion rod 23 and the dial 24 will move back to their original positions.

[0043] As Figure 10 shown in Figure 10 , a trapezoidal bayonet 19 is formed at the upper end of the arc-shaped frame 18. The trapezoidal bayonet 19 is sleeved on the outer surface of the support leg 1. Smooth portions 21 are respectively arranged at the two lower ends of the arc-shaped frame 18 to play a protective role and prevent scratching problems caused by sharp ends. The design of the trapezoidal bayonet 19 enables it to be more smooth when stuck on the surface of the support leg 1, avoiding the problem of being difficult to be stuck.

[0044] As Figure 5 , Figure 6As shown, the abutment mechanism includes an L-shaped block 30 disposed at the end of the protrusion 29, a T-shaped column 32 is fixedly connected to the inner side of the L-shaped block 30, the T-shaped column 32 slides through the side surface of the protrusion 29, a compression spring 33 is sleeved on the outer surface of the T-shaped column 32, and the compression spring 33 is located between the inner wall of the L-shaped block 30 and the side surface of the protrusion 29, and an inclined guide surface 31 is provided at the corner of the L-shaped block 30 near the bracket leg 1, and a friction plate 36 is fixedly connected to the corner of the outer surface of the bracket leg 1, and one side of the L-shaped block 30 is in contact with the friction plate 36. The size design of the L-shaped block 30 needs to meet the following requirements: after the pedal 17 is pressed by the foot, the moving handle 12 moves outward and rotates downward relative to the swing rod 9, and the L-shaped block 30 will not contact the surface of the bracket leg 1.

[0045] During use, the three bracket legs 1 are rotated to a suitable angle relative to the bracket base 2 and then placed on the ground. Then, holding one of the bracket legs 1, the user bends slightly and presses the foot on the surface of the pedal 17. The pedal 17 is pressed by the foot, and the moving handle 12 moves outward and rotates downward relative to the swing rod 9. During this process, the sliding shaft 13 slides relatively along the inner side of the side groove 14, pushing the limiting block 15 and squeezing the compression spring 16. At the same time, the sliding shaft 13 also rotates relatively in the side groove 14 to ensure that the outward movement and downward rotation of the moving handle 12 will not be interfered with. Subsequently, the L-shaped block 30 is separated from the bracket leg 1, and the trapezoidal bayonet 19 at the upper end of the arc frame 18 is also synchronously separated from the bracket leg 1. At this time, the state is as follows: Figure 11 As shown, the user's feet move back and forth, so that the pedal 17 drives the swing rod 9 to swing back and forth around the rotating shaft 10. The swinging corner block 35 pushes the grass layer aside to ensure that it can be inserted into the ground, and the grass layer will not be pressed after insertion, which can effectively avoid the problem of unstable layout caused by the grass layer bouncing up.

[0046] When the corner block 35 is pressed down and inserted into the ground, the foot is released and then lifted up to hook the arc frame 18 and move the pedal board 17 upward. Under the action of the compression spring 16, the limit block 15 pushes the sliding shaft 13 to reset and move. Under the guidance of the inclined guide surface 31, the L-shaped blocks 30 on both sides are smoothly clamped on the two sides of the bracket leg 1. With the action of the friction plate 36 and the elastic force of the pressure spring 33, a large friction force is generated between the friction plate 36 and the L-shaped block 30, ensuring that the pedal board 17 is stably limited, that is, the corner block 35, the swing rod 9 and other structures are positioned to form a stable support on the ground; at the same time, during the lifting process, the trapezoidal bayonet 19 will be correspondingly sleeved on the surface of the bracket leg 1, further improving the stability of the pedal board 17.

[0047] When the whole is retracted and carried, pull the dial plate 24 so that the insertion rod 23 is separated from the inner side of the limit hole 20, and then press down the arc-shaped frame 18 so that the lower end of the arc-shaped frame 18 is sleeved on the periphery of the lower end of the angle block 35 to play a protective role. Then release the hand. Under the action of the return spring 27, push the limit disk 28 so that the sliding column 26 is reset. After the insertion rod 23 is inserted into another limit hole 20, the stable positioning of the arc-shaped frame 18 is maintained. At this time, as Figure 10 shown. Therefore, it has a protection function to prevent the sharp angle block 35 from stabbing the user.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A surveying and mapping device for field investigation based on national land space planning, comprising a stand (2), wherein the lower surface of the stand (2) is rotatably connected to three support legs (1), characterized in that: A surveying instrument (3) is fixedly mounted on the upper surface of the frame seat (2); a slider (7) is slidably inserted into the lower end of the support leg (1); an hourglass-shaped groove (8) is provided on the inner side of the slider (7); a swing rod (9) is rotatably penetrated through the inner side of the hourglass-shaped groove (8); a corner block (35) is fixedly connected to the lower end of the swing rod (9); a groove (11) is provided on the upper end surface of the swing rod (9); a moving handle (12) is movably connected to the inner side of the groove (11) via an elastic mechanism; A sliding opening (34) is respectively provided on one side of the three support legs (1) away from each other and near the lower end; the movable handle (12) passes through the sliding opening (34) and is fixedly connected to a pedal (17); an arc frame (18) is inserted into the edge of the pedal (17) through a locking mechanism; two corners of the pedal (17) near the support legs (1) are respectively extended with protrusions (29); and abutment mechanisms for contacting the surface of the support legs (1) are respectively provided on one side of the two protrusions (29) near each other; The pedal (17) is pressed by the foot, so that the movable handle (12) moves outward and rotates downward relative to the swing rod (9), and the abutment mechanism no longer contacts the bracket leg (1); After the arc-shaped frame (18) slides upward relative to the pedal (17), the foot is pressed against the upper surface of the pedal (17) to prevent it from falling off; After the arc-shaped frame (18) slides down relative to the pedal (17), the lower end of the corner block (35) is located on the inner side of the arc-shaped frame (18).

2. A surveying and mapping device for field investigation based on national land space planning according to claim 1, characterized in that: The upper end of the support leg (1) is fixedly connected to the rotating block (4), and the upper end of the rotating block (4) is rotatably embedded in the lower surface of the frame seat (2). The frame seat (2) has a connecting bolt (5) rotatably penetrated at the side surface corresponding to each rotating block (4), and one end of the connecting bolt (5) is threadedly sleeved with a connecting nut (6), and the connecting bolt (5) is fixedly passed through the inner side of the rotating block (4).

3. A surveying and mapping device for field investigation based on national land space planning according to claim 1, characterized in that: Rotating shafts (10) are respectively fixedly connected to the two side surfaces of the swing rod (9) and the inner sides of the corresponding hourglass-shaped grooves (8), and the rotating shafts (10) are rotatably embedded in the inner wall of the hourglass-shaped grooves (8).

4. The surveying and mapping device for field investigation based on national land space planning according to claim 1, characterized in that: The elastic mechanism comprises a sliding shaft (13) fixedly connected to one end of the moving handle (12); side grooves (14) are respectively provided on the two side walls of the groove (11); the two ends of the sliding shaft (13) are respectively slidably inserted into the inner sides of the side grooves (14); a limiting block (15) is slidably inserted into the inner sides of the side grooves (14); the limiting block (15) is in sliding contact with the surface of the sliding shaft (13); a compression spring (16) is fixedly connected to a side of the limiting block (15) away from the limiting block (15); and one end of the compression spring (16) is fixed to the inner wall of the side groove (14).

5. The surveying and mapping device for field investigation based on national land space planning according to claim 1, characterized in that: The locking mechanism comprises two guide grooves (22) formed at the edge of the pedal (17); a shift plate (24) is provided at the end of the pedal (17) via a pulling mechanism; two insertion rods (23) are fixedly connected to a surface of one side of the shift plate (24); the insertion rods (23) slide through the pedal (17) and extend to the inner side of the guide groove (22); the two sides of the arc frame (18) slide through the inner side of the guide groove (22); the outer surface of the arc frame (18) and near the upper and lower ends are respectively provided with limiting holes (20); each of the insertion rods (23) slides and is inserted into the inner side of one of the limiting holes (20).

6. The surveying and mapping device for field investigation based on national land space planning according to claim 5, characterized in that: The pulling mechanism comprises a fixed cylinder (25) fixedly connected to the lower surface of the pedal (17), a sliding column (26) is slidably inserted into one side of the fixed cylinder (25), one end of the sliding column (26) is fixedly connected to the surface of the shift plate (24), and the other end of the sliding column (26) is fixedly connected to a limit plate (28), the limit plate (28) is in sliding contact with the inner wall of the fixed cylinder (25), and a return spring (27) is sleeved on the outer surface of the sliding column (26), and the return spring (27) is located on the inner side of the fixed cylinder (25).

7. The surveying and mapping device for field investigation based on national land space planning according to claim 1, characterized in that: The upper end of the arc frame (18) is provided with a trapezoidal bayonet (19), the trapezoidal bayonet (19) is sleeved on the outer surface of the bracket leg (1), and smooth portions (21) are respectively provided at the two lower ends of the arc frame (18).

8. The surveying and mapping device for field investigation based on national land space planning according to claim 1, characterized in that: The abutting mechanism comprises an L-shaped block (30) arranged at the end of the protrusion (29); a T-shaped column (32) is fixedly connected to the inner side of the L-shaped block (30); the T-shaped column (32) slides through the side surface of the protrusion (29); a pressure spring (33) is sleeved on the outer surface of the T-shaped column (32); and the pressure spring (33) is located between the inner wall of the L-shaped block (30) and the side surface of the protrusion (29); an inclined guide surface (31) is provided at a corner of the L-shaped block (30) close to the bracket leg (1); a friction plate (36) is fixedly connected to the corner of the outer surface of the bracket leg (1); and one side of the L-shaped block (30) is in contact with the friction plate (36).

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