Vertical surveying instrument for geographic survey

Abstract

The invention discloses a vertical surveying instrument for geographic survey, and relates to the technical field of surveying instruments, and the vertical surveying instrument is characterized in that a surveying instrument body is placed on the upper surface of a placement seat, an auxiliary shaft rod is fixedly connected to the center of the lower surface of the placement seat, and supporting legs are arranged on the sides of the lower surface of the placement seat; a fixing frame is fixedly connected to the lower surface of the placing base, the upper ends of the supporting legs are rotationally connected to the inner side of the fixing frame, and a sliding disc is slidably connected to the outer side of the auxiliary shaft rod. According to the vertical surveying instrument for geographic survey, the three sets of supporting legs are arranged below the placement seat, the device can be supported and placed through rotating unfolding of the supporting legs, meanwhile, when the supporting legs are rotationally unfolded, auxiliary clamping can be synchronously conducted on the surveying instrument body through a moving mechanism arranged between the interiors of the upper ends of the supporting legs and the fixing frame, and therefore the surveying instrument is convenient to use. Therefore, the placement stability of the surveying instrument body is improved, and the surveying instrument body is further protected.

Description

Technical Field

[0001] The invention relates to the technical field of surveying instruments, in particular to a vertical surveying instrument for geographical surveying. Background Art

[0002] The vertical surveyor is the main instrument for photogrammetry mapping, usually used for relative orientation, absolute orientation, cross-section scanning, printing orthophotos, and mapping contours. According to the scope of use, it can be divided into instruments specially matched with ground stereo photography theodolites and all-purpose instruments for both aerial survey and ground photography. The vertical surveyor is based on the geometric reversal of the photography process. Two metal space guide rods are used on the instrument to simulate the corresponding projection light rotating around the projection center to establish a geometric model similar to the photographed area. It has a wide range of applications in many fields.

[0003] In order to overcome the above-mentioned defects, prior art 1 (publication number: CN113775874A, Chinese patent with publication date of 2021-12-10) is a kind of geographic surveying and mapping vertical surveying instrument that is easy to fix, relating to the technical field of geographic surveying and mapping devices, a supporting threaded sleeve is arranged on the wall on the side panels on the left and right sides away from the surveying and mapping device, and the supporting threaded rod is inserted into the supporting threaded sleeve through a threaded connection, and the hanging rod is fixedly arranged on the closed end side wall of the supporting threaded sleeve, and the open end of the hanging ring is rotated on the supporting threaded rod through a rotating shaft to extend out of one end of the supporting threaded sleeve, and the movable end of the hanging ring is movably sleeved on the hanging rod; it adopts a large number of clamping structures, which makes it convenient to clamp the surveying and mapping device on the fixed table, facilitates the fixed installation of the surveying and mapping device, and at the same time, a limiting structure is arranged on the clamping structure to ensure the stability of the device during use.

[0004] There is also prior art 2 (publication number: CN222047299U, Chinese patent with publication date of 2024-11-22) a vertical surveying instrument, relating to the technical field of vertical surveying instruments, including a surveying instrument, a disc base is provided at the bottom of the surveying instrument, three fixed bases are fixedly installed at the bottom of the disc base, first support columns are rotatably installed inside the three fixed bases, second support columns are rotatably installed at the bottom of the three first support columns, rotating grooves are provided at the bottom of the three second support columns, connecting rods are rotatably installed inside the three rotating grooves, and the vertical surveying instrument, by releasing the limit on the connecting column, pulls the auxiliary block outward, separates the circular slider from one end of the connecting rod, and at this time, rotates the rotating block, exchanges the support foot with the roller, so that the roller is at the bottom, and when the staff carries the surveying instrument to the next surveying point, the use of rollers will make the movement more convenient and reduce physical exertion.

[0005] Although the existing technologies 1 and 2 can be used for surveying and mapping operations, they still cannot assist in fixing the surveying instrument during surveying and mapping placement. The placement stability of the device is poor and it is easy to tip over, thereby damaging the surveying instrument, which has certain limitations.

[0006] Therefore, we propose a vertical surveying instrument for geographical surveying in order to solve the above-mentioned problems. Summary of the invention

[0007] The purpose of the present invention is to provide a vertical surveying instrument for geographic surveying, so as to solve the problem raised by the above-mentioned background technology that the surveying instrument in the current market cannot be auxiliary fixed, the placement stability of the device is poor, and it is easy to tip over, thereby damaging the surveying instrument, and there are certain limitations.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vertical surveying instrument for geographical measurement, comprising a placement seat, a surveying instrument body is placed on the upper surface of the placement seat, an auxiliary shaft rod is fixedly connected at the center of the lower surface of the placement seat, and supporting legs are arranged on the sides of the lower surface of the placement seat; a fixed frame is fixedly connected to the lower surface of the placement seat, the upper ends of the supporting legs are rotatably connected to the inner side of the fixed frame, and a moving mechanism that can assist in clamping the surveying instrument body is arranged between the upper ends of the supporting legs and the fixed frame, a sliding disk is slidably connected to the outer side of the auxiliary shaft rod, an auxiliary plate is arranged on the outer side of the auxiliary shaft rod, and an adjustment mechanism that can drive the auxiliary plate to assist in supporting the device is arranged between the lower side of the sliding disk and the outer side of the auxiliary shaft rod.

[0009] Preferably, the moving mechanism includes a gear, which is fixedly connected to the inner side of the upper end of the supporting leg, a toothed plate is provided on the inner side of the fixed frame, and a clamping block is fixedly connected to the upper end of the toothed plate, and a rubber pad is fixedly connected to the inner side of the clamping block.

[0010] Preferably, a slide groove is provided on the inner side of the fixing frame, and a sliding block is nested and connected inside the slide groove, and the sliding block is fixedly connected to the side of the tooth plate.

[0011] Preferably, the toothed plate and the gear are meshed with each other, and the toothed plate drives the slider and the slide groove through the gear to form a sliding structure, the clamping block and the surveying instrument body are located at the same horizontal position, and the clamping block is arranged in an arc-shaped structure.

[0012] Preferably, the adjusting mechanism includes a connecting rotating rod, the upper end of the connecting rotating rod is hinged on the lower surface of the sliding plate, and the lower end of the connecting rotating rod is hinged on the inner side of the supporting leg, the auxiliary shaft is fixedly connected with a fixed plate, and the upper side of the fixed plate is fixedly connected with an air supply airbag, and the lower side of the fixed plate is fixedly connected with a fixed plate, and a connecting pipe is connected through the fixed plate and the air supply airbag, the lower side of the auxiliary shaft is slidably connected with a moving frame, and the side of the moving frame is fixedly connected with a rotating shaft, and the outer side of the rotating shaft is nested with an auxiliary plate, and a torsion spring is fixedly connected between the side of the auxiliary plate and the moving frame, and the lower end of the expansion airbag is fixedly connected to the upper surface of the moving frame.

[0013] Preferably, the connecting rotating rod forms a rotating structure with the sliding plate through the supporting legs, and the sliding plate forms a sliding structure with the connecting rotating rod and the auxiliary shaft rod, and the sliding plate, the fixed plate and the movable frame are arranged in sequence from top to bottom.

[0014] Preferably, the movable frame forms a rotating structure through an inflatable airbag and an auxiliary shaft rod, the lower end of the auxiliary plate is arranged in an arc-shaped structure, and the auxiliary plate forms an elastic structure with the movable frame through a torsion spring.

[0015] Preferably, the side of the fixed plate is provided with an outward protrusion, and the upper surface of the protrusion of the fixed plate is fixedly connected to a threaded sleeve, and the internal thread of the threaded sleeve is connected to a threaded rod, the upper end of the threaded rod is nested and connected to the placement seat, and the upper end of the threaded rod is fixedly connected to an extrusion plate, and the side of the placement seat is fixedly connected to a dust cleaning airbag.

[0016] Preferably, an air jet is provided above the cleaning air bag, and the cleaning air bag is located directly below the lens position of the surveying instrument body, the threaded rod forms a rotating structure with the placement seat through a threaded sleeve, the extrusion plate is located on the front side of the cleaning air bag, and the cleaning air bag and the extrusion plate are located at the same horizontal position.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) Three groups of supporting legs are arranged under the placement seat. The device can be supported and placed by rotating and unfolding the supporting legs. At the same time, when the supporting legs are rotating and unfolding, a moving mechanism can be arranged between the upper end of the supporting legs and the fixed frame to assist in clamping the surveying instrument body, thereby improving the stability of the placement of the surveying instrument body and further protecting the surveying instrument body. When the support legs rotate and unfold, the gears arranged inside the upper ends of the support legs will rotate synchronously, and the gears can drive the toothed plate meshing with the support legs to move. When the toothed plate moves, the clamping block can be synchronously driven to move, so that the clamping block clamps the bottom of the surveying instrument body. A rubber pad is arranged on the inner side of the clamping block, and the friction between the clamping block and the bottom of the surveying instrument body can be further increased through the rubber pad, thereby improving the clamping effect of the clamping block on the surveying instrument body. When the tooth plate moves under the meshing action of the tooth plate, the tooth plate will synchronously drive the slider to slide along the inside of the slide groove, and the slide groove can limit the slider, thereby further improving the stability of the tooth plate movement.

[0018] (2) When the supporting legs rotate and unfold, they will synchronously drive the connecting rod to rotate at an angle, and drive the sliding plate to slide downward along the auxiliary shaft rod through the connecting rod. At this time, the sliding plate will squeeze the air supply bag, so that the gas inside the air supply bag enters the expansion bag through the connecting pipe, causing the expansion bag to expand. When the expansion bag expands, it will synchronously push the moving frame downward. At this time, the moving frame will drive the auxiliary plate to move downward synchronously, and the lower end of the auxiliary plate will contact and squeeze the ground. The auxiliary plate will reverse synchronously when it conflicts with the ground due to the inclined setting of the lower side, thereby increasing the contact area between the device and the ground, making the device more stable. (3) When the sliding plate moves downward, it will synchronously drive the threaded sleeve to move downward. The downward movement of the threaded sleeve will cause the threaded rod to rotate under the action of the threaded connection. At this time, the threaded rod will synchronously drive the extrusion plate to rotate. The rotating extrusion plate can squeeze the cleaning air bag, so that the gas inside the cleaning air bag can be ejected outward, cleaning the lens part of the surveying instrument body, reducing dust adhesion to the outside of the lens of the surveying instrument body and affecting subsequent measurement operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of a placement seat of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the tooth plate of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting rotating rod of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the auxiliary plate of the present invention; Figure 7 This is a schematic diagram of a three-dimensional cross-sectional structure of the air supply airbag of the present invention; Figure 8It is a schematic diagram of the three-dimensional structure of the threaded sleeve of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the extruded plate of the present invention.

[0020] In the figure: 1. placement seat; 2. support leg; 3. surveying instrument body; 4. fixed frame; 5. gear; 6. tooth plate; 7. clamping block; 8. rubber pad; 9. slider; 10. slide groove; 11. connecting rotating rod; 12. sliding plate; 13. fixed plate; 14. air supply airbag; 15. expansion airbag; 16. connecting pipe; 17. auxiliary shaft rod; 18. threaded sleeve; 19. threaded rod; 20. dust cleaning airbag; 21. extrusion plate; 22. moving frame; 23. rotating shaft; 24. auxiliary plate; 25. torsion spring. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1: Figure 1-Figure 5 The technical solution shown in the figure, the present invention provides the following technical solution: a vertical surveying instrument for geographical measurement, disclosing a moving mechanism, through which the surveying instrument body 3 can be assisted to be clamped: a placement seat 1, the surveying instrument body 3 is placed on the upper surface of the placement seat 1, and an auxiliary shaft rod 17 is fixedly connected at the center of the lower surface of the placement seat 1, and a support leg 2 is arranged on the side of the lower surface of the placement seat 1, and a fixed frame 4 is fixedly connected to the lower surface of the placement seat 1, the upper end of the support leg 2 is rotatably connected to the inner side of the fixed frame 4, and a moving mechanism that can assist to clamp the surveying instrument body 3 is arranged between the upper end of the support leg 2 and the fixed frame 4 The moving mechanism includes a gear 5, which is fixedly connected to the inner side of the upper end of the supporting leg 2. A tooth plate 6 is provided on the inner side of the fixed frame 4, and a clamping block 7 is fixedly connected to the upper end of the tooth plate 6, and a rubber pad 8 is fixedly connected to the inner side of the clamping block 7. A slide groove 10 is provided on the inner side of the fixed frame 4, and a slider 9 is nested and connected inside the slide groove 10, and the slider 9 is fixedly connected to the side of the tooth plate 6. The tooth plate 6 and the gear 5 are meshed with each other, and the tooth plate 6 drives the slider 9 and the slide groove 10 through the gear 5 to form a sliding structure. The clamping block 7 and the surveying instrument body 3 are located at the same horizontal position, and the clamping block 7 is arranged in an arc-shaped structure.

[0023] Three groups of supporting legs 2 are arranged below the placement seat 1. The device can be supported and placed by rotating and unfolding the supporting legs 2. At the same time, when the supporting legs 2 are rotated and unfolded, the moving mechanism can be synchronously arranged between the upper end of the supporting legs 2 and the fixed frame 4 to assist in clamping the surveying instrument body 3, thereby improving the stability of the placement of the surveying instrument body 3 and further protecting the surveying instrument body 3; when the supporting legs 2 are rotated and unfolded, the gears 5 arranged inside the upper ends of the supporting legs 2 will rotate synchronously, and at this time, the gears 5 can drive the toothed plate 6 meshing with the toothed plate 6 to move. When the toothed plate 6 is in a During the movement, the clamping block 7 can be synchronously driven to move, so that the clamping block 7 clamps the bottom of the surveying instrument body 3. A rubber pad 8 is provided on the inner side of the clamping block 7. The rubber pad 8 can further increase the friction between the clamping block 7 and the bottom of the surveying instrument body 3, thereby improving the clamping effect of the clamping block 7 on the surveying instrument body 3; when the tooth plate 6 moves under the meshing action of the tooth plate 6, the tooth plate 6 will synchronously drive the slider 9 to slide along the inside of the slide groove 10, and the slider 9 can be limited by the slide groove 10, thereby further improving the stability of the movement of the tooth plate 6.

[0024] Embodiment 2: Figure 1 , Figure 5 , Figure 6 and Figure 7The technical scheme shown in the figure, the present invention provides the following technical scheme: a vertical surveying instrument for geographical measurement, discloses an adjustment mechanism, through which the auxiliary plate 24 can be driven to assist in supporting the device: the outer side of the auxiliary shaft rod 17 is slidably connected with a sliding disk 12, and the outer side of the auxiliary shaft rod 17 is provided with an auxiliary plate 24, and an adjustment mechanism that can drive the auxiliary plate 24 to assist in supporting the device is provided between the lower side of the sliding disk 12 and the outer side of the auxiliary shaft rod 17, the adjustment mechanism includes a connecting rotating rod 11, the upper end of the connecting rotating rod 11 is hinged to the lower surface of the sliding disk 12, and the lower end of the connecting rotating rod 11 is hinged to the inner side of the supporting leg 2, a fixed plate 13 is fixedly connected to the auxiliary shaft rod 17, and an air supply airbag 14 is fixedly connected to the upper side of the fixed plate 13, and a fixed plate 13 is fixedly connected to the lower side of the fixed plate 13, and at the same time, the fixed plate 13 and the air supply airbag 14 are fixedly connected. A connecting pipe 16 is connected through the airbags 14, a moving frame 22 is slidably connected to the lower side of the auxiliary shaft 17, and a rotating shaft 23 is fixedly connected to the side of the moving frame 22, and an auxiliary plate 24 is nested and connected to the outer side of the rotating shaft 23, and a torsion spring 25 is fixedly connected between the side of the auxiliary plate 24 and the moving frame 22, the lower end of the inflatable airbag 15 is fixedly connected to the upper surface of the moving frame 22, the connecting rotating rod 11 and the sliding plate 12 form a rotating structure through the supporting leg 2, and the sliding plate 12 forms a sliding structure through the connecting rotating rod 11 and the auxiliary shaft 17, the sliding plate 12, the fixed plate 13 and the moving frame 22 are arranged in sequence from top to bottom, the moving frame 22 forms a rotating structure with the auxiliary shaft 17 through the inflatable airbag 15, the lower end of the auxiliary plate 24 is arranged in an arc structure, and the auxiliary plate 24 forms an elastic structure with the moving frame 22 through the torsion spring 25.

[0025] When the supporting leg 2 rotates and unfolds, it will synchronously drive the connecting rotating rod 11 to rotate at an angle, and drive the sliding plate 12 to slide downward along the auxiliary shaft 17 through the connecting rotating rod 11. At this time, the sliding plate 12 will squeeze the air supply airbag 14, so that the internal gas of the air supply airbag 14 enters the interior of the expansion airbag 15 through the connecting tube 16, causing the expansion airbag 15 to expand. When the expansion airbag 15 expands, it will synchronously push the moving frame 22 to move downward. At this time, the moving frame 22 will drive the auxiliary plate 24 to move downward synchronously, and the lower end of the auxiliary plate 24 is in contact and squeezed with the ground. The auxiliary plate 24 is set in an inclined shape at the bottom, and when it conflicts with the ground, it will reverse synchronously, thereby increasing the contact area between the device and the ground, making the device more stable.

[0026] Embodiment 3: Figure 8 and Fig. 9The technical scheme shown in the invention provides the following technical scheme: a vertical surveying instrument for geographical measurement, disclosing a cleaning airbag 20, through which dust attached to the lens of the surveying instrument body 3 can be cleaned: an outward protrusion is provided on the side of the fixed plate 13, and a threaded sleeve 18 is fixedly connected to the upper surface of the protruding portion of the fixed plate 13, and a threaded rod 19 is connected to the internal thread of the threaded sleeve 18, the upper end of the threaded rod 19 is nested and connected to the placement seat 1, and an extrusion plate 21 is fixedly connected to the upper end of the threaded rod 19, a cleaning airbag 20 is fixedly connected to the side of the placement seat 1, an air jet is provided above the cleaning airbag 20, and the cleaning airbag 20 is located directly below the position of the lens of the surveying instrument body 3, the threaded rod 19 forms a rotating structure with the placement seat 1 through the threaded sleeve 18, the extrusion plate 21 is located in front of the cleaning airbag 20, and the cleaning airbag 20 and the extrusion plate 21 are located at the same horizontal position.

[0027] When the sliding plate 12 moves downward, it will synchronously drive the threaded sleeve 18 to move downward. The downward movement of the threaded sleeve 18 will cause the threaded rod 19 to rotate under the action of the threaded connection. At this time, the threaded rod 19 will synchronously drive the extrusion plate 21 to rotate. The rotating extrusion plate 21 can squeeze the cleaning airbag 20, so that the gas inside the cleaning airbag 20 can be ejected outward, and the lens part of the surveying instrument body 3 is cleaned to reduce dust adhesion to the outside of the lens of the surveying instrument body 3, which affects the subsequent measurement operations.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical surveying instrument for geographic surveying, comprising a placement seat (1), a surveying instrument body (3) is placed on the upper surface of the placement seat (1), an auxiliary shaft (17) is fixedly connected at the center of the lower surface of the placement seat (1), and a support leg (2) is arranged on the side of the lower surface of the placement seat (1); characterized in that: The lower surface of the placement seat (1) is fixedly connected to a fixed frame (4), the upper end of the support leg (2) is rotatably connected to the inner side of the fixed frame (4), and a moving mechanism capable of assisting in clamping the surveying instrument body (3) is provided between the inner side of the upper end of the support leg (2) and the fixed frame (4), the outer side of the auxiliary shaft rod (17) is slidably connected to a sliding disk (12), the outer side of the auxiliary shaft rod (17) is provided with an auxiliary plate (24), and an adjustment mechanism capable of driving the auxiliary plate (24) to assist in supporting the device is provided between the lower side of the sliding disk (12) and the outer side of the auxiliary shaft rod (17).

2. A vertical surveying instrument for geographic surveying according to claim 1, characterized in that: The moving mechanism comprises a gear (5), the gear (5) being fixedly connected to the inner side of the upper end of the supporting leg (2), a toothed plate (6) being provided on the inner side of the fixing frame (4), a clamping block (7) being fixedly connected to the upper end of the toothed plate (6), and a rubber pad (8) being fixedly connected to the inner side of the clamping block (7).

3. A vertical surveying instrument for geographic surveying according to claim 2, characterized in that: A slide groove (10) is provided on the inner side of the fixed frame (4), and a slide block (9) is nested and connected inside the slide groove (10), and the slide block (9) is fixedly connected to the side of the tooth plate (6).

4. A vertical surveying instrument for geographic surveying according to claim 3, characterized in that: The toothed plate (6) and the gear (5) are meshed with each other, and the toothed plate (6) drives the slider (9) and the slide groove (10) through the gear (5) to form a sliding structure, and the clamping block (7) and the surveying instrument body (3) are located at the same horizontal position, and the clamping block (7) is arranged in an arc-shaped structure.

5. A vertical surveying instrument for geographic surveying according to claim 1, characterized in that: The adjustment mechanism comprises a connecting rod (11), the upper end of the connecting rod (11) is hinged to the lower surface of the sliding plate (12), and the lower end of the connecting rod (11) is hinged to the inner side of the supporting leg (2), the auxiliary shaft (17) is fixedly connected to a fixing plate (13), the upper side of the fixing plate (13) is fixedly connected to an air supply airbag (14), and the lower side of the fixing plate (13) is fixedly connected to a fixing plate (13), and the fixing plate (13) and the air supply airbag are fixedly connected. A connecting pipe (16) is connected through the auxiliary shaft (17), a movable frame (22) is slidably connected to the lower side of the auxiliary shaft (17), a rotating shaft (23) is fixedly connected to the side of the movable frame (22), and an auxiliary plate (24) is nested and connected to the outer side of the rotating shaft (23), and a torsion spring (25) is fixedly connected between the side of the auxiliary plate (24) and the movable frame (22), and the lower end of the expansion airbag (15) is fixedly connected to the upper surface of the movable frame (22).

6. A vertical surveying instrument for geographic surveying according to claim 5, characterized in that: The connecting rotating rod (11) forms a rotating structure with the sliding plate (12) through the supporting legs (2), and the sliding plate (12) forms a sliding structure with the connecting rotating rod (11) and the auxiliary shaft rod (17). The sliding plate (12), the fixed plate (13) and the movable frame (22) are arranged in order from top to bottom.

7. A vertical surveying instrument for geographic surveying according to claim 6, characterized in that: The movable frame (22) forms a rotating structure through the expansion airbag (15) and the auxiliary shaft rod (17); the lower end of the auxiliary plate (24) is arranged in an arc-shaped structure, and the auxiliary plate (24) forms an elastic structure with the movable frame (22) through the torsion spring (25).

8. The vertical surveying instrument for geographic surveying according to claim 5, characterized in that: The side of the fixed plate (13) is provided with an outward protrusion, and the upper surface of the protrusion of the fixed plate (13) is fixedly connected to a threaded sleeve (18), and the internal thread of the threaded sleeve (18) is connected to a threaded rod (19), the upper end of the threaded rod (19) is nested and connected to the placement seat (1), and the upper end of the threaded rod (19) is fixedly connected to an extrusion plate (21), and the side of the placement seat (1) is fixedly connected to a dust cleaning airbag (20).

9. A vertical surveying instrument for geographic surveying according to claim 8, characterized in that: An air jet is provided above the cleaning air bag (20), and the cleaning air bag (20) is located directly below the lens position of the surveying instrument body (3). The threaded rod (19) forms a rotating structure with the placement seat (1) through the threaded sleeve (18). The extrusion plate (21) is located in front of the cleaning air bag (20), and the cleaning air bag (20) and the extrusion plate (21) are located at the same horizontal position.

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