Long-distance laser ranging device for building

Abstract

The invention belongs to the technical field of measurement, and particularly relates to a long-distance laser distance measuring device for buildings, which comprises a shell, a connecting shaft, a rotating ring, a rotating plate, a laser distance measuring instrument, a magnet and the like, and is characterized in that one end of the connecting shaft is fixedly connected to the central position of one side of the shell, and the rotating ring is rotatably arranged at the other end of the connecting shaft; the rotating plate is rotationally arranged on the outer ring of the rotating ring, the laser range finder is installed on one side of the rotating plate, and the other side of the shell is fixedly connected with two magnets which are vertically distributed up and down. By arranging the rotating ring, the rotating plate, the laser range finder and the display screen, automation and high precision of the measurement process are achieved, the laser range finder can be automatically leveled under cooperation of the rotating ring and the rotating plate, it is ensured that the measurement datum can still be kept stable at different installation angles, and the display screen displays measurement data in real time, so that workers can conveniently and rapidly read the measurement data; the structure is reasonable in design, easy and convenient to operate and high in measurement precision, and the working efficiency and reliability of vertical rod distance measurement in steel structure construction are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of measurement, and particularly relates to a long-distance laser ranging device for construction. Background Art

[0002] With the rapid development of the modern construction industry, steel structures are widely used in various industrial factories, high-rise buildings, and large-span space structures due to their high strength, short construction period, and strong plasticity. During the construction process of steel structures, it is usually necessary to weld vertical rods between two horizontal rods to construct a stable and reliable load-bearing framework. Before such welding operations, it is necessary to accurately measure the distance between the lower vertical rod and the upper vertical rod to ensure that the verticality and geometric dimensions of the overall structure meet the design requirements.

[0003] However, the currently commonly used traditional ranging methods mainly rely on manual measurement using a straightedge or a tape measure. This measurement method has low efficiency. The operator needs to repeatedly move and adjust the measuring tool, with a large workload. Moreover, manual operation is extremely vulnerable to subjective and environmental factors. For example, reading errors during measurement and inaccurate placement of the measuring tool may all lead to deviations in the measurement results, making it difficult to meet the requirements of high-precision measurement in modern steel structure buildings.

[0004] Therefore, there is a particular need for a long-distance laser ranging device for construction to solve the above problems. Summary of the Invention

[0005] In order to overcome the disadvantages of the traditional ranging method, such as low efficiency, large workload, being easily affected by subjective and environmental factors, resulting in measurement deviations, and being difficult to meet the requirements of high-precision measurement, the present invention provides a long-distance laser ranging device for construction.

[0006] The present invention is achieved through the following technical means: A long-distance laser ranging device for construction includes a housing, a connecting shaft, a rotating ring, a rotating plate, a laser rangefinder, a magnet, a display screen, a connecting plate, and a return spring. One end of the connecting shaft is fixedly connected to the center position on one side of the housing. The rotating ring is rotatably arranged at the other end of the connecting shaft. The rotating plate is rotatably arranged at the outer ring of the rotating ring. The laser rangefinder is installed on one side of the rotating plate. Two vertically distributed magnets are fixedly connected to the other side of the housing. The side surface of each magnet is flush with the side surface of the other side of the housing. The display screen is slidably arranged on the upper part of the housing and is electrically connected to the laser rangefinder. The connecting plate is fixedly connected to the inner upper region of the housing and is directly opposite to the lower part of the display screen. The return spring is fixedly connected between the display screen and the connecting plate.

[0007] In addition, it is particularly preferred that it further includes a moving block, pinch rollers, a moving rod, a straight rack, a gear, a transmission rack, a pulling block, a return spring and a magnet. Two moving rods distributed vertically are slidably arranged inside the housing. One end of each moving rod passes through the housing and is fixedly connected to a moving block. Two pinch rollers vertically distributed in the up-and-down direction are rotatably arranged on each moving block. A straight rack is fixedly connected to one side of the two moving rods close to each other. The gear is rotatably arranged at the central position inside the housing and is horizontally centered with the connecting shaft. The two straight racks are symmetrically distributed, located on the upper and lower sides of the gear respectively, and are both in meshing with the gear, and the tooth directions of the two straight racks are opposite. The transmission rack is slidably arranged on one side inside the housing and extends outside the housing. One end of its extended section is fixedly connected to a pulling block. The return spring is arranged in the lower inner area of the housing, and its two ends are respectively rotatably connected to the housing and the transmission rack. The magnet is fixedly connected to the pulling block in an embedded form, and one side surface of it is flush with one side surface of the pulling block.

[0008] In addition, it is particularly preferred that it further includes a rotating rod and a push rod. The rotating rod is rotatably arranged between the housing and the display screen. The push rod is fixedly connected to the other end of the transmission rack, and its cylindrical surface is in contact with the inclined surface of the rotating rod, forming a linkage mechanism.

[0009] In addition, it is particularly preferred that it further includes a threaded rod and a reaction spring. The threaded rod is threadedly arranged at the middle position of the housing and completely penetrates the thickness of the housing, forming a threaded fit with the gear and a sliding fit with the connecting shaft at the same time. The reaction spring is sleeved on one end of the threaded rod, and its two ends are respectively fixedly connected to the connecting shaft and the threaded rod.

[0010] In addition, it is particularly preferred that it further includes a moving frame, a clamping block and a return spring. The moving frame is slidably arranged on one side of the lower part of the housing, and its rear part extends inside the housing. The clamping block is slidably arranged on the moving frame and is located inside the housing. The return spring is fixedly connected between the moving frame and the clamping block. A plurality of card slots are vertically arranged in a line on one side of the transmission rack. The protruding part of the clamping block is adapted to the shape of the card slot and is in clamping fit with the first card slot counted from the bottom up, and the protruding part of the clamping block is in a semi-circular structure.

[0011] In addition, it is particularly preferred that it further includes a spirit level. The spirit level is fixedly connected to the upper part of one side of the rotating plate.

[0012] In addition, it is particularly preferred that it further includes a cleaning block. The cleaning block is fixedly connected to the top of the housing and is located at the upper left of the display screen. The screen surface of the display screen intersects with one side surface of the cleaning block in the vertical plane.

[0013] In addition, it is particularly preferred that it further includes a limiting rod. A limiting rod is fixedly connected to the lower part of one side of each moving block. One end of the limiting rod close to the laser rangefinder is in clamping fit with the rotating plate.

[0014] In addition, it is particularly preferred that a rubber ring is sleeved on the column surface of each clamping rod.

[0015] In addition, it is particularly preferred that both the magnet and the magnetic stone are made of permanent magnet materials.

[0016] Beneficial effects:

[0017] 1. By setting the rotating ring, rotating plate, laser rangefinder and display screen, the automation and high precision of the measurement process are realized. The laser rangefinder can be automatically leveled under the cooperation of the rotating ring and the rotating plate to ensure the stability of the measurement reference at different installation angles. The display screen real-time displays the measurement data, which is convenient for the staff to quickly read. The structure is reasonably designed, easy to operate, has high measurement accuracy, and effectively improves the work efficiency and reliability of measuring the vertical rod spacing in steel structure construction.

[0018] 2. Through the coordinated action of the moving block, clamping rod, moving rod, straight rack, gear, transmission rack, pulling block and return spring, the quick clamping and release of the vertical rod are realized, so that the whole device is not easy to shake or fall off during the measurement process, and the reliability and safety of the measurement are improved.

[0019] 3. Through the linkage mechanism composed of the rotating rod and the push rod, the linear motion of the transmission rack is converted into the lifting action of the display screen, realizing the automatic pop-up and recovery functions of driving the display screen. This not only improves the automation degree of human-computer interaction, but also effectively reduces the exposed area of the display screen, reducing the damage risk caused by the external environment or accidental touch.

[0020] 4. Through the cooperation structure of the threaded rod and the reaction spring, the automatic reset and position locking of the transmission system are realized. After the measurement is completed, the reaction spring releases the elastic potential energy, pushes the threaded rod to reset, drives the gear to rotate in the reverse direction, and then drives the relevant components to return to the initial state, ensuring the accurate return of the relevant components, reducing manual intervention, and improving the reuse rate of the device.

[0021] 5. Through the limit locking mechanism composed of the moving frame, clamping block and return spring, the multi-stage positioning control of the transmission rack is realized. The clamping block can be clamped into different card slots on the transmission rack under the action of the return spring to form a phased lock, effectively preventing the accidental sliding of the transmission rack during the measurement process and ensuring the stability during the measurement process. Brief description of the drawings

[0022] Figure 1 It is the usage state diagram of the present invention.

[0023] Figure 2 It is the three-dimensional structure schematic diagram of the connecting shaft, rotating ring, rotating plate and other components of the present invention.

[0024] Figure 3 It is the partial cross-sectional view of the housing component of the present invention.

[0025] Figure 4 This is the front elevation plan view of components such as the laser rangefinder, level, and moving block of the present invention.

[0026] Figure 5 This is the three-dimensional structure schematic diagram of components such as the magnet, magnetic stone, and threaded plate of the present invention.

[0027] Figure 6 This is the three-dimensional structure schematic diagram of components such as the connecting shaft and moving rod of the present invention.

[0028] Figure 7 This is the three-dimensional structure schematic diagram of components such as the straight rack, gear, and transmission rack of the present invention.

[0029] Figure 8 This is the left elevation plan view of components such as the return spring, rotating rod, and push rod of the present invention.

[0030] Figure 9 This is the partial cross-sectional view of the connecting shaft component of the present invention.

[0031] Figure 10 This is the three-dimensional structure schematic diagram of components such as the display screen and cleaning block of the present invention.

[0032] Figure 11 This is the three-dimensional structure schematic diagram of components such as the moving block, clamping rod, moving rod, and limiting rod of the present invention.

[0033] Figure 12 This is the three-dimensional structure schematic diagram of components such as the moving frame, clamping block, and return spring of the present invention.

[0034] In the figure: 1, steel structure; 101, cross bar; 102, vertical bar; 2, housing; 3, connecting shaft; 4, rotating ring; 5, rotating plate; 6, level; 7, laser rangefinder; 8, moving block; 81, clamping rod; 82, moving rod; 83, straight rack; 84, gear; 85, transmission rack; 86, pulling block; 87, return spring; 9, magnet; 91, magnetic stone; 10, display screen; 1001, cleaning block; 1002, connecting plate; 1003, return spring; 1004, rotating rod; 1005, push rod; 11, threaded rod; 111, reaction spring; 12, moving frame; 121, clamping block; 122, return spring; 123, clamping groove; 13, limiting rod. Detailed implementation manners

[0035] Example: A long-distance laser ranging device for construction, such as Figures 1-10As shown, it includes a housing 2, a connecting shaft 3, a rotating ring 4, a rotating plate 5, a level 6, a laser rangefinder 7, magnets 91, a display screen 10, a cleaning block 1001, a connecting plate 1002, and a return spring 1003. The right end of the connecting shaft 3 is adhesively bonded to the center position on the left side of the housing 2. The rotating ring 4 is rotatably arranged at the left end of the connecting shaft 3. The rotating plate 5 is rotatably arranged at the outer ring of the rotating ring 4. The laser rangefinder 7 is bolted to the left side of the rotating plate 5. The level 6 is adhesively bonded to the upper front side of the rotating plate 5, which can assist the operator in judging whether the laser rangefinder 7 is in a horizontal state and improve the measurement accuracy. Two vertically distributed magnets 91 are adhesively bonded to the right side of the housing 2. The right side surface of each magnet 91 is flush with the right side surface of the housing 2, and the magnet 91 is made of a permanent magnet material, such as: neodymium iron boron magnet or rubber magnet sheet. The display screen 10 is slidably arranged on the upper part of the housing 2 and is electrically connected to the laser rangefinder 7, which can display the measurement data in real time. The cleaning block 1001 is adhesively bonded to the position on the left side of the top of the housing 2 and is located above the left of the display screen 10. The left-facing screen surface of the display screen 10 intersects with the right side surface of the cleaning block 1001 in the vertical plane, so that when the display screen 10 slides upward, the cleaning block 1001 can fully contact the screen surface of the display screen 10 to achieve the automatic wiping function. The connecting plate 1002 is adhesively bonded to the inner upper area of the housing 2 and is directly opposite to the lower part of the display screen 10. The upper and lower ends of the return spring 1003 are respectively adhesively bonded to the display screen 10 and the connecting plate 1002, providing a reset force for the display screen 10.

[0036] As Figures 2-9 and Figure 11As shown in the figure, it also includes a moving block 8, clamping rods 81, moving rods 82, straight racks 83, gears 84, transmission racks 85, pulling blocks 86, return springs 87 and magnets 9. Two moving rods 82 distributed vertically are slidably arranged inside the housing 2. The outer end of each moving rod 82 passes through the housing 2 and is bonded with a moving block 8. Two clamping rods 81 distributed vertically in the up-down direction are rotatably arranged on each moving block 8. A rubber ring is sleeved on the column surface of each clamping rod 81. The rubber ring is made of a material with a high friction coefficient, wear resistance and certain elasticity, such as silicone rubber or nitrile rubber, which can effectively increase the friction force between the clamping rod 81 and the vertical rod 102, prevent sliding during the clamping process, and can play a buffering and protecting role to avoid damaging the surface of the structure to be measured. A straight rack 83 is bonded to one side of the two moving rods 82 close to each other. The gear 84 is rotatably arranged at the central position inside the housing 2 and is horizontally centered with the connecting shaft 3. The two straight racks 83 are symmetrically distributed, located on the upper and lower sides of the gear 84 respectively, and are both in meshing with the gear 84, and the tooth shapes of the two straight racks 83 are opposite. For example, the upper straight rack 83 adopts a right-handed tooth shape, and the lower straight rack 83 adopts a left-handed tooth shape. In this way, when the gear 84 rotates clockwise, the two straight racks 83 can move outwards synchronously. On the contrary, when the gear 84 rotates counterclockwise, the two straight racks 83 move inwards synchronously, so as to realize symmetric linkage control. The transmission rack 85 is slidably arranged on the front side inside the housing 2 and extends outside the housing 2. The lower end of its extended section is bonded with a pulling block 86. The return spring 87 is arranged in the lower inner area of the housing 2, and its upper and lower ends are respectively rotationally connected with the housing 2 and the transmission rack 85, providing a return acting force for the transmission rack 85 to automatically return to its original position after the operation is completed. The magnet 9 is bonded to the right part of the pulling block 86 in an embedded form, and its right side surface is flush with the right side surface of the pulling block 86. The magnet 9 is made of a permanent magnet material.

[0037] As Figure 7 and Figure 8 As shown in the figure, it also includes a rotating rod 1004 and a push rod 1005. The rotating rod 1004 is rotatably arranged between the housing 2 and the display screen 10. The push rod 1005 is bonded to the upper end of the transmission rack 85, and its column surface is in contact with the inclined surface of the rotating rod 1004 to form a linkage mechanism. When the transmission rack 85 moves downward, the push rod 1005 can push the rotating rod 1004 to rotate clockwise, driving the display screen 10 to rise.

[0038] As Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9As shown in the figure, it further includes a threaded rod 11 and a reaction spring 111. The threaded rod 11 is threadedly arranged at the middle position of the outer shell 2 and completely penetrates through the thickness of the outer shell 2, forming a threaded fit with the gear 84 and at the same time slidingly fitting with the connecting shaft 3. The reaction spring 111 is sleeved on the left end of the threaded rod 11, and its left and right ends are respectively fixedly connected to the connecting shaft 3 and the threaded rod 11, providing a reset force for the threaded rod 11.

[0039] As Figure 7 , Figure 8 and Figure 12 As shown in the figure, it further includes a moving frame 12, a clamping block 121 and a return spring 122. The moving frame 12 is slidably arranged on the front side of the lower part of the outer shell 2, and its rear part extends into the inner part of the outer shell 2. The clamping block 121 is slidably arranged on the moving frame 12 and is located inside the outer shell 2. The return spring 122 is bonded between the moving frame 12 and the clamping block 121, providing a reset force for the clamping block 121. A plurality of card slots 123 are vertically arranged in a straight line on the front side of the transmission rack 85. The protruding part of the clamping block 121 is adapted to the shape of the card slot 123 and is clamped with the first card slot 123 counted from bottom to top. Moreover, the protruding part of the clamping block 121 has a semi-circular structure and can be smoothly unclamped from the card slot 123 under an external force.

[0040] As Figure 11 As shown in the figure, it further includes a limiting rod 13. A limiting rod 13 is bonded to the lower left side of each moving block 8. The inner end of the limiting rod 13 close to the laser rangefinder 7 is clamped with the rotating plate 5, so that the rotating plate 5 is fixed on the outer shell 2, preventing the rotating plate 5 from shaking when carrying the device.

[0041] In the initial state, the two moving blocks 8 maintain the minimum distance, the limiting rod 13 is clamped with the rotating plate 5, and the laser rangefinder 7 is fixed at a specific position. At this time, the display screen 10 is received into the inner part of the outer shell 2, the clamping block 121 is clamped with the first card slot 123 counted from bottom to top, and the whole device is in a standby state, ready to enter the measurement operation; When it is necessary to use this device to measure the distance between the vertical rods 102, the staff first aligns the outer shell 2 with the left side surface of the second vertical rod 102 counted from left to right, and then squeezes the pulling block 86 and pulls the transmission rack 85 downward. In this process, the return spring 87 is stretched, accumulating an elastic potential energy that promotes the reset of the transmission rack 85. At the same time, the front side surface of the transmission rack 85 pushes the clamping block 121 forward, causing it to overcome the elastic force of the return spring 122 and disengage from the current card slot 123, and the return spring 122 is compressed accordingly; When the transmission rack 85 moves downward, it meshes positively with the gear 84. Driven by the transmission rack 85, the gear 84 rotates clockwise and meshes positively with the two spur racks 83, driving the two spur racks 83 to drive the two moving rods 82 to move outward. The two moving blocks 8 move outward with the two moving rods 82, thereby adjusting the spacing between the four clamping rods 81. At the same time, the two limit rods 13 move outward with the two moving blocks 8, disengaging from the clamping state with the rotating plate 5, and releasing the rotational freedom of the laser rangefinder 7. While the gear 84 rotates clockwise, the threaded rod 11 is driven to move to the left. During the movement, the left end of the threaded rod 11 extends from the connecting shaft 3, compressing the reaction spring 111, and the right end slides into the housing 2, so that the right side of the housing 2 is flat. When the distance between the two moving blocks 8 is greater than the width of the second vertical rod 102, the right side of the housing 2 is quickly attached to the left side of the second vertical rod 102. After the attachment, the two magnets 91 are tightly attached to the second vertical rod 102, preliminarily fixing the housing 2. When the transmission rack 85 moves downward, it drives the push rod 1005 to move downward. The push rod 1005 moves along the inclined surface of the rotating rod 1004, generating a squeezing force on the rotating rod 1004, causing the rotating rod 1004 to rotate clockwise. When the rotating rod 1004 rotates, the display screen 10 is pushed to pop out of the housing 2. At this time, the return spring 1003 is stretched and stored to prepare for the subsequent reset of the display screen 10. Then, the transmission rack 85 is pushed upward, and the return spring 87 is restored to its original state. When the transmission rack 85 moves upward, it meshes with the gear 84 in the opposite direction. Under the drive of the transmission rack 85, the gear 84 rotates counterclockwise and meshes with the two spur racks 83 in the opposite direction, driving the two spur racks 83 to drive the two moving rods 82 to move inward, and the two moving blocks 8 move inward together with the two moving rods 82 until the four clamping rods 81 contact and clamp the second vertical rod 102, further firmly fixing the housing 2. When the transmission rack 85 stops being pushed, the magnet 9 is tightly adsorbed on the second vertical rod 102, fixing the transmission rack 85 to prevent it from moving without external force. At the same time, the return spring 122 is restored to its original state, pushing the card block 121 to move backward and snap into the corresponding card slot 123, fixing the transmission rack 85 again to ensure the stability of the transmission rack 85. After the housing 2 is fixed on the second vertical rod 102, if the second vertical rod 102 is offset in the longitudinal direction, the rotating ring 4 swings clockwise or counterclockwise under the gravity of itself, the rotating plate 5 and the laser rangefinder 7 until the rotating ring 4, the rotating plate 5 and the laser rangefinder 7 are in a horizontal vertical state as a whole; If the second vertical rod 102 is offset in the lateral direction, the rotating plate 5 swings left and right under the gravity of itself and the laser rangefinder 7 until it reaches a horizontal vertical state, thereby ensuring that the laser rangefinder 7 remains horizontal under different offset conditions and improving the measurement accuracy. At the same time, by observing the level 6, it is intuitively checked whether the laser rangefinder 7 is in a horizontal state. If it is not horizontal, the position of the second vertical rod can be adjusted; When it is confirmed that the laser rangefinder 7 is in a horizontal state, the laser rangefinder 7 is started, and the laser rangefinder 7 emits a laser beam to the first vertical pole 102. After internal photoelectric conversion and signal processing, the distance between the second vertical pole 102 and the first vertical pole 102 is measured, and the measurement data is transmitted to the display screen 10. The display screen 10 displays the measurement results in real time, which is convenient for the staff to read; After the measurement is completed, the transmission rack 85 is pulled downward again, causing the two moving blocks 8 to drive the four clamping rods 81 to move outward, loosening the clamping of the second vertical rod 102, and finally pulling the housing 2 off from the second vertical rod 102. At this time, the reaction spring 111 returns to its original state and releases the elastic potential energy, pushing the threaded rod 11 to move rightward and return to its initial position. During the movement, the threaded rod 11 drives the gear 84 to rotate counterclockwise, and the gear 84 further drives the two moving rods 82 to drive the two moving blocks 8 to move inward to their initial positions, causing the two limit rods 13 to move inward and re-engage with the rotating plate 5 to fix the laser rangefinder 7. At the same time, the gear 84 drives the transmission rack 85 to move upward and return to its initial position. When the transmission rack 85 is reset, the reset spring 87 returns to its original state, and together, causes the transmission rack 85 to return to its initial position. When the transmission rack 85 moves upward, it drives the push rod 1005 to move upward, so that the push rod 1005 stops squeezing the rotating rod 1004. At this time, the return spring 1003 returns to its original state, pulling the display screen 10 back into the housing 2. At this point, the measurement between the two vertical rods 102 is completed. If it is necessary to measure the distance between the third vertical rod 102 and the second vertical rod 102, repeat the above steps.

Claims

1. A long-distance laser ranging device for construction, characterized in that, It includes a housing (2), a connecting shaft (3), a rotating ring (4), a rotating plate (5), a laser rangefinder (7), a magnet (91), a display screen (10), a connecting plate (1002) and a return spring (1003). One end of the connecting shaft (3) is fixedly connected to the central position on one side of the housing (2). The rotating ring (4) is rotatably arranged at the other end of the connecting shaft (3). The rotating plate (5) is rotatably arranged at the outer ring of the rotating ring (4). The laser rangefinder (7) is installed on one side of the rotating plate (5). Two magnets (91) vertically distributed up and down are fixedly connected to the other side of the housing (2). One side surface of each magnet (91) is flush with the other side surface of the housing (2). The display screen (10) is slidably arranged on the upper part of the housing (2) and is electrically connected to the laser rangefinder (7). The connecting plate (1002) is fixedly connected to the inner upper region of the housing (2) and is opposite to the lower part of the display screen (10). The return spring (1003) is fixedly connected between the display screen (10) and the connecting plate (1002).

2. The long-distance laser ranging device for construction according to claim 1, characterized in that, It also includes a moving block (8), pinch rollers (81), a moving rod (82), a straight rack (83), a gear (84), a transmission rack (85), a pulling block (86), a return spring (87) and a magnet (9). Two moving rods (82) distributed up and down are slidably arranged inside the housing (2). One end of each moving rod (82) passes through the housing (2) and is fixedly connected to a moving block (8). Two pinch rollers (81) vertically distributed in the up and down direction are rotatably arranged on each moving block (8). A straight rack (83) is fixedly connected to one side of the two moving rods (82) close to each other. The gear (84) is rotatably arranged at the central position inside the housing (2) and is horizontally centered with the connecting shaft (3). The two straight racks (83) are symmetrically distributed, located on the upper and lower sides of the gear (84) respectively, and are both in a meshing state with the gear (84), and the tooth shapes of the two straight racks (83) are opposite. The transmission rack (85) is slidably arranged on one side inside the housing (2) and extends outside the housing (2). One end of its extended section is fixedly connected to a pulling block (86). The return spring (87) is arranged in the inner lower region of the housing (2), and its two ends are respectively rotatably connected to the housing (2) and the transmission rack (85). The magnet (9) is fixedly connected to the pulling block (86) in an embedded form, and one side surface of it is flush with one side surface of the pulling block (86).

3. The long-distance laser ranging device for construction according to claim 2, characterized in that, It also includes a rotating rod (1004) and a push rod (1005). The rotating rod (1004) is rotatably arranged between the housing (2) and the display screen (10). The push rod (1005) is fixedly connected to the other end of the transmission rack (85), and its cylindrical surface contacts the inclined surface of the rotating rod (1004) to form a linkage mechanism.

4. The long-distance laser ranging device for construction according to claim 3, characterized in that, It further includes a threaded rod (11) and a reaction spring (111). The threaded rod (11) is threadedly arranged at the middle position of the outer shell (2) and completely penetrates through the thickness of the outer shell (2), forming a threaded fit with the gear (84), and at the same time, it is slidably fitted with the connecting shaft (3). The reaction spring (111) is sleeved on one end of the threaded rod (11), and its two ends are fixedly connected to the connecting shaft (3) and the threaded rod (11) respectively.

5. The long-distance laser ranging device for construction according to claim 4, characterized in that, It further includes a moving frame (12), a clamping block (121) and a return spring (122). The moving frame (12) is slidably arranged on one side of the lower part of the outer shell (2), and its rear part extends into the interior of the outer shell (2). The clamping block (121) is slidably arranged on the moving frame (12) and is located inside the outer shell (2). The return spring (122) is fixedly connected between the moving frame (12) and the clamping block (121). A plurality of card slots (123) are vertically arranged in a line on one side of the transmission rack (85). The protruding part of the clamping block (121) is adapted to the shape of the card slot (123) and is in clamping fit with the first card slot (123) counted from bottom to top, and the protruding part of the clamping block (121) is in a semi-circular structure.

6. The long-distance laser ranging device for construction according to claim 5, characterized in that, It further includes a spirit level (6), and the spirit level (6) is fixedly connected to one side of the upper part of the rotating plate (5).

7. The long-distance laser ranging device for construction according to claim 6, characterized in that, It further includes a cleaning block (1001), and the cleaning block (1001) is fixedly connected to the top end of the outer shell (2) and is located at the upper left of the display screen (10). The screen surface of the display screen (10) intersects with one side surface of the cleaning block (1001) in the vertical plane.

8. The long-distance laser ranging device for construction according to claim 7, characterized in that It further includes a limiting rod (13). One limiting rod (13) is fixedly connected to one side of the lower part of each moving block (8), and the end of the limiting rod (13) close to the laser rangefinder (7) forms a clamping fit with the rotating plate (5).

9. The long-distance laser ranging device for construction according to claim 8, wherein A rubber ring is sleeved on the cylindrical surface of each clamping rod (81).

10. A long-distance laser ranging device for construction according to claim 9, characterized in that, Both the magnet (9) and the magnetic stone (91) are made of permanent magnet materials.

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