Multi-stage adjusting type engineering distance measuring device

Abstract

The utility model discloses a multi-stage adjusting type engineering distance measuring device, and relates to the technical field of distance measuring. A pointer is rotatably mounted on one side of the distance measuring wheel, a mechanical digital display dial plate is rotatably mounted on the other side of the distance measuring wheel, a rectangular plate is fixedly mounted at the bottom of the mechanical digital display dial plate, a sleeve is fixedly mounted at the top of the rectangular plate, a rectangular rod is inserted into the top of the sleeve, and a plurality of fixing holes are symmetrically formed in the outer side of the sleeve. A connecting assembly is arranged in the rectangular rod, the fixing hole is matched with the connecting assembly for use, a rectangular movable groove is formed in the side, close to the top, of the rectangular rod, round mounting holes are formed in the two sides, close to the top, of the rectangular rod, a U-shaped base is movably mounted at the top of the rectangular rod through an adjusting assembly, and an arc-shaped supporting plate is fixedly mounted at the top of the U-shaped base; the adjusting assembly is installed at the top of the rectangular rod and connected with the U-shaped base, and angle adjustment and locking between the U-shaped base and the rectangular rod are integrally achieved.

Description

Technical Field

[0001] This utility model relates to the field of distance measurement technology, specifically to a multi-level adjustable engineering distance measuring device. Background Technology

[0002] With the continuous expansion of engineering scale and the diversification of construction environment, higher requirements are placed on the practicality, adaptability and ease of operation of distance measuring devices. Various distance measuring tools are also being continuously optimized to meet the needs of complex engineering scenarios.

[0003] Traditional handheld distance measuring methods require operators to hold the device continuously to push the distance measuring wheel to roll. The weight of the distance measuring wheel and the resistance generated by the rolling of the ground are entirely borne by the wrist and palm. Prolonged operation will cause the wrist muscles to be constantly tense and blood circulation to be obstructed, which can easily lead to soreness and even tremors. At the same time, when handheld, the wrist is prone to up-and-down swaying and left-and-right deviation due to fatigue or ground bumps, which will cause the distance measuring wheel to have unstable contact with the ground. This will not only further aggravate operator fatigue, but may also affect the accuracy of the measurement data, making it difficult to meet the needs of long-distance, high-precision measurement in mechanical engineering. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a multi-level adjustable engineering distance measuring device, which has the advantages of multi-dimensional flexible adjustment, reduced wrist fatigue, and improved measurement accuracy, thereby solving the problems of operational fatigue and reduced measurement accuracy caused by traditional handheld distance measuring methods.

[0005] To achieve the above objectives, this utility model employs the following technical solution: a multi-level adjustable engineering distance measuring device, comprising a distance measuring wheel, a pointer rotatably mounted on one side of the distance measuring wheel, a mechanical digital display dial rotatably mounted on the other side of the distance measuring wheel, a rectangular plate fixedly mounted at the bottom of the mechanical digital display dial, a sleeve fixedly mounted at the top of the rectangular plate, a rectangular rod inserted at the top of the sleeve, several fixing holes symmetrically opened on the outer side of the sleeve, a connecting component provided inside the rectangular rod, the fixing holes cooperating with the connecting component, a rectangular movable groove opened on the side of the rectangular rod near the top, circular mounting holes opened on both sides of the rectangular rod near the top, a U-shaped base movably mounted on the top of the rectangular rod through an adjusting component, and an arc-shaped support plate fixedly mounted on the top of the U-shaped base.

[0006] As a preferred embodiment of this utility model, the adjustment component includes a mounting rod, which is fixedly installed inside a circular mounting hole. The mounting rod passes through both sides of the U-shaped base. A first handle is fixedly installed on the outer side of the mounting rod. The first handle is located inside a rectangular movable groove. Several adjustment grooves are symmetrically opened on one side of the U-shaped base.

[0007] As a preferred embodiment of the present invention, the adjustment component further includes a first mounting groove, which is formed at one end of the mounting rod, and a second mounting groove is formed at the other end of the mounting rod, wherein the first mounting groove and the second mounting groove are connected.

[0008] As a preferred embodiment of the present invention, the adjustment assembly further includes a pressing rod, which is movably installed inside the first mounting groove. A movable block is fixedly installed at the other end of the pressing rod. The movable block is movably installed inside the second mounting groove. A first spring is fixedly installed at one end of the movable block near the pressing rod, and the other end of the first spring is fixedly installed to one side of the second mounting groove.

[0009] As a preferred embodiment of the present invention, the adjustment assembly further includes a connecting block, which is fixedly installed at the other end of the movable block. A locking rod is fixedly installed on the side of the connecting block near the adjustment groove, and the locking rod is used in conjunction with the adjustment groove.

[0010] As a preferred embodiment of this utility model, the connecting component includes a circular mounting groove, which is located at the bottom of a rectangular rod. A rectangular hole is provided on one side of the rectangular rod, and the rectangular hole is connected to the circular mounting groove. Two movable holes are symmetrically provided inside the circular mounting groove, and the positions of the movable holes correspond to the positions of the fixed holes.

[0011] As a preferred embodiment of this utility model, the connecting assembly further includes a push rod, which is movably installed inside a circular mounting groove. A second spring is fixedly installed on the top of the push rod, and the other end of the second spring is fixedly installed to the inner top surface of the circular mounting groove. A lever is fixedly installed on the outer side of the push rod, and the lever passes through a rectangular hole. A fixing block is movably installed inside the movable hole, and the fixing block cooperates with the fixing hole.

[0012] As a preferred embodiment of this utility model, the bottom of the push rod is tapered, the end of the fixing block near the bottom of the push rod is tapered, four elastic clips are symmetrically fixedly installed on both sides of the arc-shaped support plate, a second handle is fixedly installed inside the arc-shaped support plate, two limiting grooves are symmetrically opened on the inner side of the second mounting groove, two limiting blocks are symmetrically fixedly installed on the outer side of the movable block, and the limiting blocks are movably sleeved inside the limiting grooves.

[0013] The beneficial effects of this utility model are as follows:

[0014] This utility model achieves multi-dimensional flexible adjustment through the coordinated design of the connecting component and the adjusting component. In the height direction, the rectangular rod and the sleeve nesting structure, together with the spring-driven fixing block, are controlled by the lever to engage with the fixing hole, achieving rapid stepless adjustment. In the angle direction, the pressing rod drives the locking rod to disengage from the adjusting groove, allowing the U-shaped base to be freely rotated to the desired tilt angle. After releasing, the spring resets and locks, adapting to different heights and operating postures.

[0015] The arm support system, consisting of an arc-shaped support plate and elastic clips, transforms the single-point force of traditional handheld operation into a large-area support for the arm. Combined with the second grip, it forms a stable operating area, significantly reducing wrist fatigue. The design of the tapered push rod and the inclined surface of the fixing block makes height locking more reliable, while the elastic clips ensure a stable fit for the arm, reducing the impact of shaking on measurement accuracy. It is especially suitable for long-distance engineering measurement scenarios. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a multi-stage adjustable engineering distance measuring device according to this utility model;

[0017] Figure 2 This is a schematic diagram of the mechanical digital display dial structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the sleeve structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the rectangular rod of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the rectangular rod of this utility model;

[0021] Figure 6 This is a schematic diagram of the U-shaped base structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the first grip structure of this utility model;

[0023] Figure 8 This is a schematic diagram of the adjusting groove structure of this utility model;

[0024] Figure 9 This is a schematic diagram of the mounting rod structure of this utility model;

[0025] Figure 10 This is a schematic diagram of the cross-sectional structure of the mounting rod of this utility model.

[0026] Reference numerals: 1. Measuring wheel; 2. Pointer; 3. Mechanical digital display dial; 4. Rectangular plate; 5. Sleeve; 501. Rectangular hole; 6. Rectangular rod; 7. U-shaped base; 8. Arc-shaped support plate; 9. Circular mounting slot; 10. Second spring; 11. Push rod; 1101. Toggle rod; 12. Movable hole; 13. Fixing block; 14. Fixing hole; 15. Rectangular movable slot; 16. Mounting rod; 17. First grip; 18. Adjustment slot; 19. First mounting slot; 20. Second mounting slot; 21. Pressing rod; 22. Movable block; 23. First spring; 24. Connecting block; 25. Locking rod. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0028] Figures 1-10 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 - Appendix Figure 10 The present invention will be further described below.

[0029] A multi-stage adjustable engineering distance measuring device includes a distance measuring wheel 1, a pointer 2 rotatably mounted on one side of the distance measuring wheel 1, a mechanical digital display dial 3 rotatably mounted on the other side of the distance measuring wheel 1, a rectangular plate 4 fixedly mounted on the bottom of the mechanical digital display dial 3, a sleeve 5 fixedly mounted on the top of the rectangular plate 4, a rectangular rod 6 inserted into the top of the sleeve 5, several fixing holes 14 symmetrically opened on the outer side of the sleeve 5, a connecting component is provided inside the rectangular rod 6, the fixing holes 14 are used in conjunction with the connecting component, a rectangular movable groove 15 is opened on the side of the rectangular rod 6 near the top, and circular mounting holes are opened on both sides of the rectangular rod 6 near the top. A U-shaped base 7 is movably mounted on the top of the rectangular rod 6 through an adjustment component, and an arc-shaped support plate 8 is fixedly mounted on the top of the U-shaped base 7.

[0030] In this implementation scheme, the measuring wheel 1 is set as the core measuring component, which is existing technology. When the pushing device makes the measuring wheel 1 roll on the ground, the internal counting device records the distance corresponding to the circumference of the wheel for each rotation of the measuring wheel 1. By accumulating the number of rotations and combining the circumference data of the wheel, the total distance moved by the device can be calculated. The pointer 2 is mounted on one side of the measuring wheel 1, also based on existing technology. During the measurement process, the pointer 2 can intuitively indicate the distance measuring status, understand the rotation of the measuring wheel 1, and assist in judging the measurement accuracy. The mechanical digital display dial 3 is existing technology. Its working principle is to receive the rotation information of the measuring wheel 1. When the measuring wheel 1 rotates... The internal mechanical transmission or sensing device transmits rotation information to the mechanical digital display dial 3. The signal processing unit inside the dial converts and calculates this information, and finally displays the measured distance value accurately in digital form on the display area of ​​the dial. The rectangular plate 4 serves as a connector and support. The sleeve 5 is fixedly installed on the top of the rectangular plate 4, and a rectangular rod 6 is inserted into its top to form a telescopic base structure, providing a framework for adjusting the overall height of the device. The rectangular rod 6 is inserted into the top of the sleeve 5 and can extend and retract relative to the sleeve 5 to adjust the height of the device. The fixing hole 14 is used in conjunction with the connecting component to fix the relative position of the rectangular rod 6 and the sleeve 5 through the engagement relationship with the connecting component. The structure is positioned to ensure stability after height adjustment, preventing the device from wobbling during use due to height changes. The connecting component is located inside the rectangular rod 6 and mates with the fixing hole 14, enabling overall height adjustment and locking between the rectangular rod 6 and the sleeve 5. The rectangular movable groove 15 is located on the side of the rectangular rod 6 near the top, providing installation and movement space for the first grip 17 in the adjustment component, while limiting the range of motion of the first grip 17 to avoid affecting the angle adjustment of the U-shaped base 7. Circular mounting holes are located on both sides of the rectangular rod 6 near the top for fixing the mounting rod 16 in the adjustment component. The adjustment component is installed on the top of the rectangular rod 6 and mates with the U-shaped base 5. The base 7 connects to the rectangular rod 6, allowing for angle adjustment and locking. The U-shaped base 7 connects the rectangular rod 6 and the arc-shaped support plate 8, and its angle can be adjusted by the adjustment components to provide stable support for the arc-shaped support plate 8. This ensures that the arc-shaped support plate 8 can be adjusted to a suitable angle as needed, providing a comfortable support position for the operator's arm. The arc-shaped support plate 8 conforms to the shape of the arm, providing support for the operator's arm. This transforms the single-point force on the hand in traditional handheld rangefinders into a large-area force distribution on the arm, effectively reducing wrist fatigue, improving operational stability, ensuring smooth movement of the device during measurement, and improving measurement accuracy.

[0031] Specifically, the adjustment assembly includes a mounting rod 16, which is fixedly installed inside a circular mounting hole. The mounting rod 16 passes through both sides of the U-shaped base 7. A first handle 17 is fixedly installed on the outside of the mounting rod 16. The first handle 17 is located inside a rectangular movable groove 15. Several adjustment grooves 18 are symmetrically opened on one side of the U-shaped base 7.

[0032] In this embodiment, the mounting rod 16 is fixedly installed in the circular mounting hole and passes through both sides of the U-shaped base 7, serving as the rotation axis for adjusting the angle of the U-shaped base 7. This provides support and guidance for the rotation of the U-shaped base 7 and provides a mounting base for the first grip 17. The U-shaped base 7 is connected to the rectangular rod 6 through the mounting rod 16 and can rotate around the mounting rod 16 under the action of the adjustment component, thereby driving the arc-shaped support plate 8 to adjust its angle. This provides support for the arc-shaped support plate 8 and transmits the angle adjustment action. The first grip 17 is fixedly installed on the outside of the mounting rod 16 and is located in the rectangular movable groove 15, allowing the operator to hold it to push the device to move. At the same time, its position design does not affect the angle adjustment of the U-shaped base 7. The adjustment grooves 18 are symmetrically opened on one side of the U-shaped base 7 and are used in conjunction with the locking rod 25 in the adjustment component. By locking the locking rod 25 into different adjustment grooves 18, the U-shaped base 7 can be fixed at different angle positions.

[0033] Specifically, the adjustment assembly also includes a first mounting groove 19, which is formed at one end of the mounting rod 16, and a second mounting groove 20 is formed at the other end of the mounting rod 16. The first mounting groove 19 and the second mounting groove 20 are connected.

[0034] In this embodiment, a first mounting groove 19 is provided at one end of the mounting rod 16 to provide mounting space for related components such as the pressing rod 21 in the adjustment assembly. A second mounting groove 20 is provided at the other end of the mounting rod 16 and is connected to the first mounting groove 19 to provide accommodating space for the movable block 22, the first spring 23, and others.

[0035] Specifically, the adjustment assembly also includes a pressing rod 21, which is movably installed inside the first mounting groove 19. A movable block 22 is fixedly installed at the other end of the pressing rod 21. The movable block 22 is movably installed inside the second mounting groove 20. A first spring 23 is fixedly installed at one end of the movable block 22 near the pressing rod 21. The other end of the first spring 23 is fixedly installed to one side of the second mounting groove 20.

[0036] In this embodiment, a pressing rod 21 is movably installed in the first mounting groove 19. By manually pressing its end, the operator can move the movable block 22 in the second mounting groove 20, triggering the unlocking action. The movable block 22 is fixedly installed at the other end of the pressing rod 21 and movably installed in the second mounting groove 20, serving as a force transmission mechanism. It transmits the pressing force of the pressing rod 21 to the connecting block 24 and the locking rod 25. At the same time, it achieves reset under the action of the first spring 23. One end of the first spring 23 is fixed to the end of the movable block 22 near the pressing rod 21, and the other end is fixed to one side of the second mounting groove 20. Normally, it is in a naturally extended state, providing reset force for the movable block 22. When the pressing rod 21 is pressed, the first spring 23 is stretched. When the pressing rod 21 is released, the spring contracts and pulls the movable block 22 and the pressing rod 21 to reset, realizing the re-engagement of the locking rod 25 with the adjusting groove 18 and completing the angle locking.

[0037] Specifically, the adjustment assembly also includes a connecting block 24, which is fixedly installed at the other end of the movable block 22. A locking rod 25 is fixedly installed on the side of the connecting block 24 near the adjustment groove 18, and the locking rod 25 is used in conjunction with the adjustment groove 18.

[0038] In this embodiment, a connecting block 24 is fixedly installed at the other end of the movable block 22, which serves to connect the movable block 22 and the locking rod 25, transmitting the movement of the movable block 22 to the locking rod 25, so that the locking rod 25 can move synchronously with the movement of the movable block 22. The locking rod 25 is fixedly installed on the side of the connecting block 24 near the adjustment groove 18, and works in conjunction with the adjustment groove 18 on the U-shaped base 7. It is the core execution component for angle locking. When the locking rod 25 is engaged in the adjustment groove 18, the angle of the U-shaped base 7 is fixed. When the locking rod 25 is disengaged from the adjustment groove 18, the U-shaped base 7 can rotate freely to adjust the angle.

[0039] Specifically, the connecting component includes a circular mounting groove 9, which is located at the bottom of a rectangular rod 6. A rectangular hole 501 is provided on one side of the rectangular rod 6, and the rectangular hole 501 is connected to the circular mounting groove 9. Two movable holes 12 are symmetrically provided inside the circular mounting groove 9, and the positions of the movable holes 12 correspond to the positions of the fixed holes 14.

[0040] In this embodiment, a circular mounting groove 9 is provided to provide installation space for the push rod 11, the second spring 10, and other components in the connecting assembly. A rectangular hole 501 is opened on one side of the rectangular rod 6 and is connected to the circular mounting groove 9, providing a through and movable channel for the lever 1101. This allows the operator to control the movement of the push rod 11 by moving the lever 1101 within the rectangular hole 501, thereby achieving height adjustment unlocking and locking. Movable holes 12 are symmetrically opened inside the circular mounting groove 9, corresponding to the fixed holes 14, and are used to accommodate the fixed block 13 and restrict its movement direction, ensuring that the fixed block 13 can accurately enter and exit the fixed hole 14, thus achieving stable locking between the rectangular rod 6 and the sleeve 5.

[0041] Specifically, the connecting assembly also includes a push rod 11, which is movably installed inside the circular mounting groove 9. A second spring 10 is fixedly installed on the top of the push rod 11, and the other end of the second spring 10 is fixedly installed on the inner top surface of the circular mounting groove 9. A lever 1101 is fixedly installed on the outer side of the push rod 11, and the lever 1101 passes through the rectangular hole 501. A fixing block 13 is movably installed inside the movable hole 12, and the fixing block 13 is used in conjunction with the fixing hole 14.

[0042] In this embodiment, the push rod 11 is movably installed in the circular mounting groove 9. By moving itself, it pushes the fixed block 13 to move, controlling its engagement with the fixed hole 14, thereby achieving unlocking or locking. One end of the second spring 10 is fixed to the top of the push rod 11, and the other end is fixed to the top surface inside the circular mounting groove 9. Normally, it provides a pushing force to the push rod 11. When the push rod 11 is moved by the lever 1101, the spring is compressed. After the lever 1101 is released, the spring rebounds and pushes the push rod 11 back to its original position, so that the fixed block 13 is re-engaged into the fixed hole 14 to complete the locking. The lever 1101 is fixed to the outside of the push rod 11 and passes through the rectangular hole 501. The operator can manually move the lever 1101 to move the push rod 11, thereby controlling the engagement state of the fixed block 13 and the fixed hole 14. The fixed block 13 is movably installed in the movable hole 12 and engages with the fixed hole 14. It is the actuator for height locking. When engaged in the fixed hole 14, it fixes the relative position of the rectangular rod 6 and the sleeve 5. When disengaged, it allows both to extend and retract to adjust their height.

[0043] Specifically, the bottom of the push rod 11 is tapered, the end of the fixing block 13 near the bottom of the push rod 11 is tapered, four elastic clips are symmetrically fixed on both sides of the arc-shaped support plate 8, a second handle is fixedly installed inside the arc-shaped support plate 8, two limiting grooves are symmetrically opened on the inner side of the second mounting groove 20, and two limiting blocks are symmetrically fixed on the outer side of the movable block 22, with the limiting blocks movably fitted inside the limiting grooves.

[0044] In this embodiment, by setting the bottom of the push rod 11 to be tapered, which cooperates with the tapered end of the fixed block 13, the inclined surface contact characteristic is utilized to push the fixed block 13 more smoothly along the movable hole 12 and into and out of the fixed hole 14 when the push rod 11 moves up and down, reducing jamming during the adjustment process and improving the flexibility and reliability of height adjustment. The four elastic clips symmetrically installed on both sides of the arc-shaped support plate 8 can clamp the operator's arm through their own elastic deformation, enhancing the fit and stability between the arm and the support plate. The internal second grip provides a gripping point for the hand, which cooperates with the elastic clips to form a double fixation, improving the overall stability during operation and reducing shaking. The two limiting grooves symmetrically opened on the inner side of the second mounting groove 20 provide a moving track for the limiting block of the movable block 22, restricting the movement direction of the movable block 22 and ensuring that it can only slide smoothly along the axial direction of the groove, avoiding the movable block 22 from deviating during movement, and ensuring the accuracy of the cooperation between the locking rod 25 and the adjustment groove 18.

[0045] In summary: When using this utility model, the height is first adjusted to suit the operator's height. By manually moving the lever 1101, the push rod 11 moves upward within the circular mounting groove 9. At this time, the second spring 10 is compressed, simultaneously pulling the rectangular rod 6 upward, causing the fixing block 13 to disengage from the fixing hole 14 on the sleeve 5. Then, the extension length of the rectangular rod 6 within the sleeve 5 is manually adjusted to a suitable height. After releasing the lever 1101, the second spring 10 rebounds, pushing the push rod 11 downward to reset, and the fixing block 13 disengages from the fixing hole 14 on the sleeve 5. 3. Under the push of the conical surface of the push rod 11, it moves outward along the movable hole 12 and engages with the corresponding fixed hole 14, completing the height fixation. When performing short-distance distance measurement, the first handle 17 in the rectangular movable slot 15 can be manually rotated out, and the distance measurement operation can be performed by holding the first handle 17. If performing long-distance distance measurement, the first handle 17 is manually rotated back into the rectangular movable slot 15. Then, according to the operation posture requirements, the pressing rod 21 is manually pressed to move it in the first mounting slot 19 and drive the movable block 22 in... Sliding within the second mounting groove 20, the first spring 23 is stretched, and the limiting block on the outer side of the movable block 22 moves synchronously along the limiting groove on the inner side of the second mounting groove 20. The movable block 22 drives the locking rod 25 to disengage from the adjustment groove 18 on the U-shaped base 7 via the connecting block 24. Then, the U-shaped base 7 is manually rotated to rotate around the mounting rod 16 to a suitable angle. The pressing rod 21 is released, and the first spring 23 retracts, pulling the movable block 22 and the pressing rod 21 back to their original positions. The locking rod 25 is then re-engaged into the corresponding adjustment groove under the action of the connecting block 24. 18. After the angle is fixed, the operator places his arm into the arc-shaped support plate 8. The elastic clips on both sides of the arc-shaped support plate 8 clamp the arm through elastic deformation. At the same time, the operator holds the second handle inside the arc-shaped support plate 8 and pushes the device to make the measuring wheel 1 roll on the ground. When the measuring wheel 1 rotates, the mechanical digital display dial 3 receives the rotation information of the measuring wheel 1 through the internal mechanical transmission or sensing device. After the signal processing unit converts and calculates the information, the measured distance is displayed digitally on the dial, thereby achieving efficient and accurate long-distance measurement.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A multi-stage adjustable engineering distance measuring device, characterized in that, The device includes a measuring wheel (1), a pointer (2) is rotatably mounted on one side of the measuring wheel (1), a mechanical digital display dial (3) is rotatably mounted on the other side of the measuring wheel (1), a rectangular plate (4) is fixedly mounted on the bottom of the mechanical digital display dial (3), a sleeve (5) is fixedly mounted on the top of the rectangular plate (4), a rectangular rod (6) is inserted into the top of the sleeve (5), several fixing holes (14) are symmetrically opened on the outer side of the sleeve (5), a connecting component is provided inside the rectangular rod (6), the fixing holes (14) are used in conjunction with the connecting component, a rectangular movable groove (15) is opened on the side of the rectangular rod (6) near the top, and circular mounting holes are opened on both sides of the rectangular rod (6) near the top. A U-shaped base (7) is movably mounted on the top of the rectangular rod (6) through an adjustment component, and an arc-shaped support plate (8) is fixedly mounted on the top of the U-shaped base (7).

2. The multi-stage adjustable engineering distance measuring device according to claim 1, characterized in that, The adjustment assembly includes a mounting rod (16), which is fixedly installed inside a circular mounting hole. The mounting rod (16) passes through both sides of the U-shaped base (7). A first handle (17) is fixedly installed on the outside of the mounting rod (16). The first handle (17) is located inside a rectangular movable groove (15). Several adjustment grooves (18) are symmetrically opened on one side of the U-shaped base (7).

3. The multi-stage adjustable engineering distance measuring device according to claim 2, characterized in that, The adjustment assembly also includes a first mounting groove (19), which is located at one end of the mounting rod (16), and a second mounting groove (20) is located at the other end of the mounting rod (16). The first mounting groove (19) and the second mounting groove (20) are connected.

4. The multi-stage adjustable engineering distance measuring device according to claim 3, characterized in that, The adjustment assembly also includes a pressing rod (21), which is movably installed inside the first mounting groove (19). A movable block (22) is fixedly installed at the other end of the pressing rod (21). The movable block (22) is movably installed inside the second mounting groove (20). A first spring (23) is fixedly installed at one end of the movable block (22) near the pressing rod (21). The other end of the first spring (23) is fixedly installed to one side of the second mounting groove (20).

5. A multi-stage adjustable engineering distance measuring device according to claim 4, characterized in that, The adjustment assembly also includes a connecting block (24), which is fixedly installed at the other end of the movable block (22). A locking rod (25) is fixedly installed on the side of the connecting block (24) near the adjustment groove (18), and the locking rod (25) is used in conjunction with the adjustment groove (18).

6. The multi-stage adjustable engineering distance measuring device according to claim 4, characterized in that, The connecting component includes a circular mounting groove (9) which is located at the bottom of a rectangular rod (6). A rectangular hole (501) is provided on one side of the rectangular rod (6). The rectangular hole (501) is connected to the circular mounting groove (9). Two movable holes (12) are symmetrically provided on the inner side of the circular mounting groove (9). The positions of the movable holes (12) correspond to the positions of the fixed holes (14).

7. A multi-stage adjustable engineering distance measuring device according to claim 6, characterized in that, The connecting assembly also includes a push rod (11), which is movably installed inside the circular mounting groove (9). A second spring (10) is fixedly installed on the top of the push rod (11), and the other end of the second spring (10) is fixedly installed on the inner top surface of the circular mounting groove (9). A lever (1101) is fixedly installed on the outer side of the push rod (11), and the lever (1101) passes through the rectangular hole (501). A fixing block (13) is movably installed inside the movable hole (12), and the fixing block (13) cooperates with the fixing hole (14).

8. A multi-stage adjustable engineering distance measuring device according to claim 7, characterized in that, The bottom of the push rod (11) is tapered, and the end of the fixed block (13) near the bottom of the push rod (11) is tapered. Four elastic clips are symmetrically fixed on both sides of the arc-shaped support plate (8). A second handle is fixedly installed inside the arc-shaped support plate (8). Two limiting grooves are symmetrically opened on the inner side of the second mounting groove (20). Two limiting blocks are symmetrically fixed on the outer side of the movable block (22). The limiting blocks are movably sleeved inside the limiting groove.

Images