A variable height observation rod

Abstract

This utility model belongs to the field of observation pole technology, and particularly relates to a variable height observation pole. It addresses the problem that existing observation poles have a fixed height, cannot be flexibly adjusted, and are difficult to position optimally in different terrains, affecting data accuracy and failing to meet the needs of observation targets at different heights. The proposed solution is a variable height observation pole, comprising a main support pole and a secondary support pole slidably connected within the main support pole. The advantages of this utility model are: the observation pole, through the sliding connection of the main and secondary poles and adjustment handles, allows for flexible height adjustment without tools; the guiding structure ensures accuracy; the prism orientation can be flexibly adjusted using positioning sleeves; it is reliably fixed; the multi-support point design with accessories adapts to various terrains, ensuring stability and data accuracy.

Description

Technical Field

[0001] This utility model relates to an observation pole, specifically a variable height observation pole, and belongs to the field of observation pole technology. Background Technology

[0002] Trigonometric leveling is a method for determining the elevation difference between two control points by observing the horizontal distance and zenith distance (or elevation angle) between them. It is a simple method with minimal limitations imposed by terrain conditions, and is a fundamental method for determining the elevation of geodetic control points. Generally, an instrument (theodolite or total station) is set up at the station, and the instrument height is measured; an observation target (pole or prism) is placed at the target point, and the target height is measured. Currently, trigonometric leveling is mainly applicable to fourth-order and lower leveling surveys, primarily using surveying robots for observation. However, during observation, because the observation pole only has one prism, the observed data cannot be verified, making accuracy difficult to guarantee. Furthermore, due to limitations in observation conditions, the observed data cannot be verified and calibrated, further compromising observation accuracy.

[0003] In the prior art, such as the novel observation rod for building inspection disclosed in announcement number CN216846285U, there are advantages such as preventing the observation rod from tilting, and allowing the tilt of the support plate to be adjusted by installing the nut body at different positions on the threaded rod, so that the support plate is level with the ground and prevents the support plate from causing the observation rod to tilt. However, the above-mentioned prior art has the following shortcomings: When the above-mentioned observation rod is used, the height of the observation rod is fixed and cannot be flexibly adjusted according to actual needs. This brings many inconveniences in practical applications. For example, under different terrain conditions, the observation rod of fixed height may not be able to enable the observation equipment to reach the optimal observation position, thus affecting the accuracy of the observation data. It is also difficult to meet the observation requirements when facing observation targets of different heights. Summary of the Invention

[0004] The purpose of this invention is to provide a variable-height observation rod to solve the problems of existing devices with fixed observation rod heights that cannot be flexibly adjusted, making it difficult to achieve the optimal position of the equipment in different terrains, affecting data accuracy, and failing to meet the needs of observation targets at different heights.

[0005] The present invention achieves the above objectives through the following technical solution: a variable height observation rod, comprising a main support rod and a secondary support rod slidably connected within the main support rod. An adjustment groove is provided on one side surface of the main support rod. Two fixing plates are symmetrically fixedly installed on the outer surface of the main support rod at the opening of the adjustment groove. An adjustment handle is slidably connected between the two fixing plates. The adjustment handle is connected to one end of the secondary support rod slidably connected within the main support rod.

[0006] Positioning sleeves are fixedly installed on the outer surfaces of one end of the main support rod and the secondary support rod, and rotating sleeves are slidably connected to the outer surfaces of the two positioning sleeves. A fixed support rod is fixedly installed on the outer surface of the rotating sleeve. A U-shaped frame is connected to one end of the fixed support rod through a nut, and a prism is installed inside the U-shaped frame.

[0007] As a further embodiment of this utility model: a fixing rod is fixedly installed on the surface of the adjusting handle, and two guide blocks are slidably connected to the surface of the fixing rod. A wedge block is fixedly installed on the surface of each of the two guide blocks. A spring is sleeved on the outer surface of the fixing rod between the two guide blocks. Wedge grooves that are adapted to the wedge blocks are equidistantly opened on the opposite sides of the two fixing plates.

[0008] As a further embodiment of this utility model: the inner wall of the main support rod is integrally formed with a guide strip, and the outer surface of the secondary support rod is provided with a guide groove that matches the guide strip. The secondary support rod is slidably connected to the main support rod through the guide strip and the guide groove.

[0009] As a further improvement of this utility model: a plug-in rod is fixedly installed at one end of the fixed support rod near the U-shaped frame, and a positioning hole adapted to the plug-in rod is opened on the bottom surface of the U-shaped frame.

[0010] As a further improvement of this utility model: reset buttons are fixedly installed on the surfaces of both wedges. Pressing both reset buttons at the same time can cause the wedges to slide out of the wedge grooves and release the restriction on the support rod.

[0011] As a further embodiment of this utility model: the two positioning sleeves are provided with the same connecting telescopic rod on their outer sides, and the two ends of the connecting telescopic rod are respectively fixedly connected to the two rotating sleeves. The outer surface of the lower rotating sleeve is threaded with a positioning bolt, one end of which penetrates the rotating sleeve and abuts against the outer surface of the lower positioning sleeve.

[0012] As a further embodiment of this utility model: a fixing ring is fixedly installed on the outer surface of the main support rod, and hinge rods are evenly distributed and hinged on the outer surface of the fixing ring. A sleeve rod is slidably connected to the outer surface of the hinge rod, and a support plate is fixedly installed at one end of the sleeve rod. Anchor nails are provided on the surface of the support plate, and through holes adapted to the anchor nails are opened on the surface of the support plate.

[0013] As a further improvement of this utility model: a clip is fixedly installed on the bottom surface of the support plate, and a prefabricated fixing plate is provided below the support plate. The surface of the prefabricated fixing plate is provided with a groove that matches the clip.

[0014] As a further improvement of this utility model, a horizontal block is fixedly installed on the outer surface of the positioning sleeve located below.

[0015] As a further embodiment of this utility model: a fixing plate 1 is fixedly installed on the outer surface of the hinge rod, a fixing plate 2 is fixedly installed on the outer surface of the sleeve rod, and an adjusting screw is threadedly connected to the outer surface of the fixing plate 1, with one end of the adjusting screw rotatably connected to the surface of the fixing plate 2.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes a combination of structures including a main support rod, a secondary support rod, a positioning sleeve, a rotating sleeve, a horizontal block, a positioning hole, a wedge groove, a wedge block, a reset button, a hinge rod, a sleeve rod, and anchor pins to control the interaction between the sliding rod and the U-shaped locking head. The observation rod achieves flexible height adjustment through the sliding connection between the main support rod and the secondary support rod, along with an adjusting handle. During adjustment, simply pressing the reset button releases the limit switch, and pushing the adjusting handle raises or lowers the secondary support rod. Releasing the button causes the wedge block to engage with the wedge groove under spring pressure, completing the fixation. The entire process requires no tools, is simple and labor-saving, and significantly improves height adjustment efficiency. Simultaneously, the cooperation between the guide strip and the guide groove ensures stable sliding of the secondary support rod along a straight line, preventing deviation and ensuring accurate height adjustment. This allows for rapid adaptation to the height requirements of different observation scenarios.

[0018] With the help of positioning sleeves and rotating sleeves, the prism can flexibly adjust the observation azimuth. When the rotating sleeve rotates, it drives the fixed support rod and the prism to rotate synchronously. The connecting telescopic rod ensures that the two rotating sleeves move synchronously and avoids azimuth deviation. After the azimuth is adjusted to the right position, tightening the positioning bolts can fix the rotating sleeve through friction, ensuring that the prism azimuth remains stable. The cooperation between the plug rod and the positioning hole enhances the connection between the U-shaped frame and the fixed support rod, preventing loosening during azimuth adjustment. This makes the observation azimuth adjustment both flexible and reliable, and can meet the needs of observing targets in different directions.

[0019] The fixed ring outside the main support rod is hinged to a ring of evenly distributed hinged rods, which, together with the sleeve rod and support plate, form multiple support points, significantly improving the overall stability of the observation rod. The sliding connection between the hinged rod and the sleeve rod, as well as the setting of the adjusting screw, can precisely adjust the support radius and height to adapt to different terrains. The support plate increases the contact area, and the anchor nails can fix it to the ground. The prefabricated fixing plate with the cooperation of the clip and the slot can distribute the pressure and further enhance stability. The leveling block allows the operator to quickly calibrate the level, ensuring the accuracy of the observation data, so that the observation rod can work stably in various complex terrains. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 In this utility model Figure 1 A schematic diagram of the side view structure;

[0022] Figure 3 This is a schematic diagram of the structure of the fixing strip and the connecting telescopic rod in this utility model;

[0023] Figure 4 This is a schematic diagram of the adjusting groove, fixing plate, and wedge groove structure in this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the U-shaped frame, fixed support rod and horizontal block in this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the insertion rod and positioning hole in this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the fixing ring, sleeve rod, and hinge rod in this utility model;

[0027] Figure 8 In this utility model Figure 4 Enlarged structural diagram at point A in the diagram;

[0028] Figure 9 In this utility model Figure 4 Enlarged schematic diagram of the structure at point B in the diagram;

[0029] Figure 10 In this utility model Figure 7 Enlarged schematic diagram of the structure at point C;

[0030] Figure 11 In this utility model Figure 7 An enlarged schematic diagram of the structure at point D in the diagram.

[0031] In the diagram: 1. Main support rod; 2. Secondary support rod; 3. Positioning sleeve; 4. Rotating sleeve; 5. Positioning bolt; 6. Connecting telescopic rod; 7. Horizontal block; 9. Fixed support rod; 10. U-shaped frame; 11. Prism; 12. Insert rod; 13. Positioning hole; 14. Guide strip; 15. Guide groove; 16. Fixed strip; 17. Wedge groove; 18. Adjusting handle; 19. Fixed rod; 20. Spring; 21. Guide block; 22. Wedge block; 23. Reset button; 24. Fixed ring; 25. Hinge rod; 26. Sleeve rod; 27. Support plate; 28. Anchor nail; 29. ​​Prefabricated fixed plate; 30. Adjusting screw; 31. Fixed plate one; 32. Fixed plate two; 33. Clip; 34. Clip groove; 35. Adjusting groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] like Figures 1 to 11 As shown, a variable height observation rod includes a main support rod 1 and a secondary support rod 2 slidably connected within the main support rod 1. An adjustment groove 35 is provided on one side surface of the main support rod 1. Two fixing plates 16 are symmetrically fixedly installed on the outer surface of the main support rod 1 at the opening of the adjustment groove 35. An adjustment handle 18 is slidably connected between the two fixing plates 16. The adjustment handle 18 is connected to one end of the secondary support rod 2 slidably connected within the main support rod 1.

[0035] Positioning sleeves 3 are fixedly installed on the outer surfaces of one end of the main support rod 1 and the secondary support rod 2, respectively. Rotating sleeves 4 are slidably connected to the outer surfaces of the two positioning sleeves 3. Fixed support rods 9 are fixedly installed on the outer surfaces of the rotating sleeves 4. A U-shaped frame 10 is connected to one end of the fixed support rod 9 through a nut. A prism 11 is installed inside the U-shaped frame 10.

[0036] The main support rod 1 and the secondary support rod 2 are connected by a sliding connection, allowing for flexible height adjustment of the observation rod. This enables rapid changes in the height of the observation equipment to suit different observation needs and scenarios, significantly improving the applicability of the observation rod. An adjustment groove 35 is formed on one side of the main support rod 1, and fixed plates 16 are symmetrically installed at the opening of the groove 35. An adjustment handle 18 is slidably connected between the fixed plates 16, and simultaneously connected to the secondary support rod 2. This structural design provides a stable operating component and guide path for the raising and lowering of the secondary support rod 2. Operators can easily adjust the height of the secondary support rod by operating the adjustment handle 18. The sliding of the support rod 2 is easily controlled, making the height adjustment operation simpler and less strenuous. The outer surface of the support rod 1 and the support rod 2 is equipped with a positioning sleeve 3. The outer surface of the positioning sleeve 3 is slidably connected to the rotating sleeve 4. The rotating sleeve 4 is equipped with a fixed support rod 9. The fixed support rod 9 is connected to the U-shaped frame 10 and the prism 11 is installed through a nut. This structure allows the two prisms 11 to rotate synchronously in the circumferential direction by manually rotating the rotating sleeve 4. That is, the prisms 11 can rotate flexibly, which is convenient for adjusting the observation position to adapt to the observation target in different directions. The nut connection method also facilitates the installation, disassembly and maintenance of the U-shaped frame 10 and the prisms 11.

[0037] Furthermore, a fixing rod 19 is fixedly installed on the surface of the adjusting handle 18. Two guide blocks 21 are slidably connected to the surface of the fixing rod 19. A wedge block 22 is fixedly installed on the surface of each of the two guide blocks 21. A spring 20 is sleeved on the outer surface of the fixing rod 19 and located between the two guide blocks 21. Wedge grooves 17 that are adapted to the wedge blocks 22 are equidistantly opened on the opposite surfaces of the two fixing strips 16.

[0038] The spring force of the spring 20 is used to make the wedge block 22 engage with the wedge groove 17, which can quickly position and fix the support rod 2, ensuring that the support rod 2 remains stable after being adjusted to the required height, avoiding changes in height due to accidental contact, etc. At the same time, the structure is simple, easy to operate, and the fixing effect is reliable.

[0039] Furthermore, the inner wall of the main support rod 1 is integrally formed with a guide strip 14, and the outer surface of the secondary support rod 2 is provided with a guide groove 15 that matches the guide strip 14. The secondary support rod 2 is slidably connected to the main support rod 1 through the guide strip 14 and the guide groove 15.

[0040] The guide strip 14 on the inner wall of the main support rod 1 and the guide groove 15 on the outer surface of the secondary support rod 2 cooperate with each other, playing a good guiding role during the sliding process of the secondary support rod 2. This effectively prevents the secondary support rod 2 from deviating, tilting or rotating during lifting and lowering, ensuring that the secondary support rod 2 always slides stably along a straight line, thus guaranteeing the stability of the overall structure of the observation rod and the accuracy of height adjustment.

[0041] Furthermore, a plug-in rod 12 is fixedly installed at one end of the fixed support rod 9 near the U-shaped frame 10, and a positioning hole 13 adapted to the plug-in rod 12 is opened on the bottom surface of the U-shaped frame 10.

[0042] The plug-in rod 12 on the fixed support rod 9 cooperates with the positioning hole 13 on the bottom surface of the U-shaped frame 10, which plays a positioning role when the U-shaped frame 10 is connected to the fixed support rod 9, so that the two can be quickly aligned and installed, improving installation efficiency. At the same time, this plug-in structure enhances the firmness of the connection between the U-shaped frame 10 and the fixed support rod 9, and can effectively prevent the U-shaped frame 10 from loosening or shaking when adjusting the orientation of the prism 11 or when subjected to external force, thus ensuring the stability of the prism 11 during operation.

[0043] Furthermore, reset buttons 23 are fixedly installed on the surfaces of both wedges 22. Pressing both reset buttons 23 at the same time will cause the wedges 22 to slide out of the wedge grooves 17, thereby releasing the restriction on the support rod 2.

[0044] By simultaneously pressing the reset button 23, the wedge block 22 can slide out of the wedge groove 17, releasing the restriction on the support rod 2. This design makes the unlocking operation of the support rod 2 simple and convenient. It only requires pressing the two reset buttons 23 at the same time by hand, without the need for other tools, which greatly improves the efficiency of height adjustment and makes it convenient for operators to quickly adjust the height.

[0045] Furthermore, the two positioning sleeves 3 are provided with the same connecting telescopic rod 6 on their outer sides. The two ends of the connecting telescopic rod 6 are respectively fixedly connected to the two rotating sleeves 4. The outer surface of the lower rotating sleeve 4 is threaded with a positioning bolt 5. One end of the positioning bolt 5 passes through the rotating sleeve 4 and abuts against the outer surface of the lower positioning sleeve 3.

[0046] Two telescopic rods 6 are connected to the outer sides of the two positioning sleeves 3, and their two ends are fixedly connected to the rotating sleeves 4. This ensures that the two rotating sleeves 4 rotate synchronously, so that the circumferential orientation adjustment of the fixed support rod 9 and the prism 11 is consistent, avoiding orientation deviation and ensuring the accuracy of observation. After the circumferential orientation adjustment of the prism 11 is completed, the positioning bolts 5 located on the lower rotating sleeve 4 are tightened to make them abut against the positioning sleeve 3. The rotating sleeve 4 is fixed by friction, thereby stabilizing the orientation of the prism 11. The fixing method is simple and effective, and can reliably keep the observation orientation of the prism 11 unchanged. Moreover, the distance between the two prisms 11 can be adjusted by the telescopic rods 6, so as to adapt to different observation distances and observation heights.

[0047] Example 2

[0048] Improvements based on Example 1:

[0049] Furthermore, a fixing ring 24 is fixedly installed on the outer surface of the main support rod 1. The outer surface of the fixing ring 24 is evenly connected with hinge rods 25 in a ring shape. A sleeve rod 26 is slidably connected to the outer surface of the hinge rod 25. A support plate 27 is fixedly installed at one end of the sleeve rod 26. Anchor nails 28 are provided on the surface of the support plate 27. Through holes adapted to the anchor nails 28 are opened on the surface of the support plate 27.

[0050] A support plate 27 with anchor nails 28 is installed at one end of the sleeve rod 26. This structure forms multiple support points, which can greatly enhance the overall stability of the observation rod and prevent the observation rod from tipping over. The sliding connection between the hinge rod 25 and the sleeve rod 26 can adjust the support radius and length to adapt to the support needs of different terrains. The support plate 27 increases the contact area with the ground, and the anchor nails 28 can fix the support plate 27 to the ground, further improving the stability of the observation rod under various ground conditions.

[0051] Furthermore, a retaining strip 33 is fixedly installed on the bottom surface of the support plate 27, and a prefabricated fixing plate 29 is provided below the support plate 27. The surface of the prefabricated fixing plate 29 is provided with a slot 34 that is compatible with the retaining strip 33.

[0052] The locking strip 33 on the bottom surface of the support plate 27 cooperates with the locking groove 34 on the surface of the prefabricated fixing plate 29 to achieve quick positioning and connection between the support plate 27 and the prefabricated fixing plate 29. This allows the prefabricated fixing plate 29 to stably assist in supporting the observation rod. Especially when the ground is uneven or soft, the prefabricated fixing plate 29 can distribute pressure and improve the support effect. At the same time, the locking structure is easy to install and disassemble, and is convenient to carry and transport.

[0053] Furthermore, a horizontal block 7 is fixedly installed on the outer surface of the positioning sleeve 3 located below.

[0054] A level block 7 is installed on the outer surface of the lower positioning sleeve 3, which can intuitively show whether the observation rod is in a horizontal state. This provides operators with a convenient horizontal calibration reference, ensuring that the observation rod remains horizontal during installation and use, avoiding deviations in observation data due to the tilt of the observation rod, and ensuring the accuracy of the observation results.

[0055] Furthermore, a fixing plate 31 is fixedly installed on the outer surface of the hinge rod 25, and a fixing plate 32 is fixedly installed on the outer surface of the sleeve rod 26. An adjusting screw 30 is threadedly connected to the outer surface of the fixing plate 31, and one end of the adjusting screw 30 is rotatably connected to the surface of the fixing plate 32.

[0056] The first fixing plate 31 on the hinge rod 25 and the second fixing plate 32 on the sleeve rod 26 are connected by the adjusting screw 30. Rotating the adjusting screw 30 can precisely adjust the extension length of the sleeve rod 26 on the hinge rod 25, thereby precisely adjusting the position and height of the support plate 27. This adjustment method is simple and highly accurate, and can adapt to the fine adjustment needs of different terrains, further enhancing the stability of the observation rod and the convenience of level calibration.

[0057] Working principle:

[0058] When it is necessary to change the overall height of the observation rod, the operator simultaneously presses the two reset buttons 23. This action will cause the two guide blocks 21 to move closer to each other on the fixed rod 19, so that the spring 20 sleeved on the outer surface of the fixed rod 19 and located between the two guide blocks 21 is compressed. As the guide blocks 21 move, the wedge block 22 fixed on the surface of the guide block 21 slides out from the wedge groove 17 opened on the opposite side of the fixed strip plate 16, thereby releasing the limitation on the support rod 2.

[0059] At this time, the operator can push the adjusting handle 18 to slide it between the two fixed strips 16 and in the adjusting groove 35 on one side of the main support rod 1. Since the adjusting handle 18 is connected to the end of the secondary support rod 2 located inside the main support rod 1, the sliding of the adjusting handle 18 will drive the secondary support rod 2 to slide inside the main support rod 1. During the sliding of the secondary support rod 2, the guide strip 14 on the inner wall of the main support rod 1 and the guide groove 15 on the outer surface of the secondary support rod 2 cooperate with each other to play a guiding and limiting role, ensuring that the secondary support rod 2 rises and falls stably and avoids deviation or shaking.

[0060] After the observation rod height is adjusted to the desired position, the operator releases the reset button 23. Under the elastic force of the spring 20, the two guide blocks 21 move away from each other, and the wedge block 22 re-engages into the corresponding wedge groove 17, fixing the support rod 2 in the current position, thus completing the height adjustment;

[0061] To adapt to different observation orientation requirements, the orientation of prism 11 can be adjusted. The operator rotates the rotating sleeve 4 so that it slides on the outer surface of the positioning sleeve 3. Since the fixed support rod 9 is fixedly installed on the outer surface of the rotating sleeve 4, and the U-shaped frame 10 is connected to one end of the fixed support rod 9 by a nut, and the prism 11 is installed in the U-shaped frame 10, the rotation of the rotating sleeve 4 will drive the fixed support rod 9, the U-shaped frame 10 and the prism 11 to rotate synchronously, so as to adjust the orientation of the prism 11.

[0062] A plug-in rod 12 is fixedly installed at one end of the fixed support rod 9 near the U-shaped frame 10. The bottom surface of the U-shaped frame 10 is provided with a positioning hole 13 that matches the plug-in rod 12. The cooperation between the plug-in rod 12 and the positioning hole 13 can enhance the stability of the connection between the U-shaped frame 10 and the fixed support rod 9 and prevent the U-shaped frame 10 from becoming loose during the orientation adjustment process.

[0063] After the prism 11 is adjusted to the appropriate position, the operator tightens the positioning bolt 5 on the outer surface of the lower rotating sleeve 4, so that one end of the positioning bolt 5 passes through the rotating sleeve 4 and abuts against the outer surface of the lower positioning sleeve 3. The rotating sleeve 4 is fixed in the current position by friction, thereby fixing the prism 11. The two ends of the connecting telescopic rod 6 on the outer side of the two positioning sleeves 3 are fixedly connected to the two rotating sleeves 4 respectively. During the rotation of the rotating sleeve 4, the connecting telescopic rod 6 will extend and retract accordingly to ensure that the two rotating sleeves 4 move synchronously and ensure the consistency of the prism 11 orientation adjustment.

[0064] When the support position of the support plate 27 needs to be adjusted to adapt to different terrains, the operator rotates the adjusting screw 30. Since the adjusting screw 30 is threadedly connected to the fixing plate 31 on the outer surface of the hinge rod 25, and one end of it is rotatably connected to the fixing plate 32 on the outer surface of the sleeve rod 26, rotating the adjusting screw 30 will change the position of the fixing plate 32 relative to the fixing plate 31, thereby causing the sleeve rod 26 to slide on the hinge rod 25, changing the extension length of the sleeve rod 26, and realizing the adjustment of the support position of the support plate 27.

[0065] The clips 33 on the bottom of the support plate 27 can be inserted into the slots 34 on the surface of the prefabricated fixing plate 29 to achieve quick positioning and connection between the support plate 27 and the prefabricated fixing plate 29. Alternatively, the anchor nails 28 can be driven into the ground through the through holes on the surface of the support plate 27 to further enhance the connection strength between the support plate 27 and the ground. Through the coordinated support of multiple support plates 27, the observation rod can be kept stable under various terrain conditions to avoid tilting or shaking.

[0066] The horizontal block 7 located on the outer surface of the lower positioning sleeve 3 is used to visually display the horizontal status of the observation rod. The operator can determine whether the observation rod is horizontal by observing the position of the bubble in the horizontal block 7. When the horizontal block 7 indicates that the observation rod is not horizontal, the operator rotates the adjusting screw 30 on the corresponding hinge rod 25 according to the direction of the bubble offset. By adjusting the adjusting screw 30, the extension length of the sleeve rod 26 on the hinge rod 25 is adjusted, thereby changing the height of the support plate 27 corresponding to the support leg. During the adjustment process, the position of the bubble in the horizontal block 7 is continuously observed until the bubble is in the center position of the horizontal block 7, indicating that the observation rod has been adjusted to a horizontal state. Through the cooperation of the horizontal block 7 and the adjusting screw 30, the horizontal calibration of the observation rod can be achieved quickly and accurately, ensuring the accuracy of the observation work.

[0067] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0068] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A variable height observation post, characterized by: The system includes a main support rod (1) and a secondary support rod (2) slidably connected within the main support rod (1). An adjustment groove (35) is provided on one side surface of the main support rod (1). Two fixing plates (16) are symmetrically fixed on the outer surface of the main support rod (1) at the opening of the adjustment groove (35). An adjustment handle (18) is slidably connected between the two fixing plates (16). The adjustment handle (18) is connected to one end of the secondary support rod (2) slidably connected within the main support rod (1). Positioning sleeves (3) are fixedly installed on the outer surfaces of one end of the main support rod (1) and the secondary support rod (2), respectively. Rotating sleeves (4) are slidably connected to the outer surfaces of the two positioning sleeves (3). A fixed support rod (9) is fixedly installed on the outer surface of the rotating sleeve (4). A U-shaped frame (10) is connected to one end of the fixed support rod (9) through a nut. A prism (11) is installed inside the U-shaped frame (10).

2. The variable height control arm of claim 1, wherein: A fixing rod (19) is fixedly installed on the surface of the adjusting handle (18). Two guide blocks (21) are slidably connected to the surface of the fixing rod (19). A wedge block (22) is fixedly installed on the surface of each of the two guide blocks (21). A spring (20) is sleeved on the outer surface of the fixing rod (19) between the two guide blocks (21). Wedge grooves (17) that are adapted to the wedge blocks (22) are equidistantly opened on the opposite sides of the two fixing plates (16).

3. The variable height control arm of claim 1, wherein: The inner wall of the main support rod (1) is integrally formed with a guide strip (14), and the outer surface of the secondary support rod (2) is provided with a guide groove (15) that matches the guide strip (14). The secondary support rod (2) is slidably connected to the main support rod (1) through the guide strip (14) and the guide groove (15).

4. The variable height control arm of claim 1, wherein: The fixed support rod (9) is fixedly installed with a plug rod (12) at one end near the U-shaped frame (10), and the bottom surface of the U-shaped frame (10) is provided with a positioning hole (13) that matches the plug rod (12).

5. The variable height observation rod according to claim 2, characterized in that: Both wedges (22) are fixedly equipped with reset buttons (23). Pressing the two reset buttons (23) at the same time will cause the wedges (22) to slide out of the wedge groove (17) and release the restriction on the support rod (2).

6. The variable height observation rod according to claim 1, characterized in that: The two positioning sleeves (3) are provided with the same connecting telescopic rod (6) on their outer sides. The two ends of the connecting telescopic rod (6) are fixedly connected to the two rotating sleeves (4) respectively. The outer surface of the lower rotating sleeve (4) is threaded with a positioning bolt (5). One end of the positioning bolt (5) passes through the rotating sleeve (4) and abuts against the outer surface of the lower positioning sleeve (3).

7. The variable height observation rod according to claim 1, characterized in that: A fixing ring (24) is fixedly installed on the outer surface of the main support rod (1). A hinge rod (25) is evenly hinged on the outer surface of the fixing ring (24). A sleeve rod (26) is slidably connected to the outer surface of the hinge rod (25). A support plate (27) is fixedly installed at one end of the sleeve rod (26). An anchor nail (28) is provided on the surface of the support plate (27). A through hole adapted to the anchor nail (28) is opened on the surface of the support plate (27).

8. The variable height observation rod according to claim 7, characterized in that: The bottom surface of the support plate (27) is fixedly installed with a clip (33), and a prefabricated fixing plate (29) is provided below the support plate (27). The surface of the prefabricated fixing plate (29) is provided with a slot (34) that matches the clip (33).

9. The variable height observation rod according to claim 1, characterized in that: A horizontal block (7) is fixedly installed on the outer surface of the positioning sleeve (3) located below.

10. The variable height observation rod according to claim 7, characterized in that: A fixing plate 1 (31) is fixedly installed on the outer surface of the hinge rod (25), and a fixing plate 2 (32) is fixedly installed on the outer surface of the sleeve rod (26). An adjusting screw (30) is threadedly connected to the outer surface of the fixing plate 1 (31), and one end of the adjusting screw (30) is rotatably connected to the surface of the fixing plate 2 (32).

Images