Laser distance measuring device for distance measurement based on height

Abstract

The invention belongs to the technical field of laser distance measurement, and discloses a height-based distance measurement laser distance measurement device, which comprises a laser distance measurement module body, a fixed plate connected to the laser distance measurement module body, a sliding opening formed in the inner side of the fixed plate, and a sliding cleaning assembly arranged on the inner side of the fixed plate, the cleaning device is used for cleaning the laser emission window / receiving window of the laser ranging module body. By integrating the sliding cleaning assembly, the adjusting assembly and the reset cleaning assembly, a cleaning system which achieves automatic cleaning and does not need manual intervention is achieved, a traditional manual ladder climbing cleaning mode is thoroughly replaced, potential safety hazards such as falling and collision during high-place operation are avoided, the manual round-trip time is saved, the cleaning response is fast, and the cleaning efficiency is improved. Cleaning can be automatically completed in the intermittent working period of the height distance measuring equipment, it is ensured that a laser transmitting window / receiving window of the laser distance measuring module body is continuously clean, and high-frequency use scenes such as medical examination and intelligent height scales are adapted.

Description

Technical Field

[0001] This invention belongs to the field of laser ranging technology, specifically a laser ranging device for measuring height. Background Technology

[0002] Currently, existing laser ranging modules are widely used in industrial inspection, medical height measurement, smart home and other fields. Their core function is to calculate distance by emitting laser and receiving reflected signals. They have the characteristics of high precision and fast response. In medical scenarios, they are vertically installed on physical examination instruments to realize the measurement of adult standing height. In industrial scenarios, they are integrated into AGV carts or logistics shelves to monitor the height of goods in real time. In consumer scenarios, they are embedded in smart access control or height and weight scales to provide basic measurement functions.

[0003] Existing laser ranging modules are fixedly installed at high locations. When dust, oil, or other contaminants adhere to the surface of the laser emitting / receiving window, dust particles absorb or scatter the laser light, leading to optical path attenuation and signal noise. Since the laser ranging modules do not integrate automatic cleaning functions, manual cleaning of the high-mounted laser ranging modules is carried out by climbing ladders. Relying on manual external cleaning and maintenance to ensure the cleanliness of the optical window poses safety hazards and is inefficient, making it difficult to quickly remove the attached dust and oil. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a laser ranging device for height measurement, including a laser ranging module body, a fixing plate connected to the laser ranging module body, and a sliding opening on the inner side of the fixing plate, and further including...

[0005] A sliding cleaning component is disposed on the inner side of the fixed plate and is used to clean the laser emitting window / receiving window of the laser ranging module body;

[0006] The sliding cleaning component includes a sliding block, and a fixed rod is movably connected inside the sliding block. A cleaning cloth is provided on the fixed rod. After the fixed rod is wetted by the wetting component, it can easily soften the dust and dirt attached to the laser emitting window / receiving window of the laser ranging module body, making it easy to clean.

[0007] An adjustment component, disposed inside the sliding port, is used to drive the sliding cleaning component;

[0008] The reset cleaning component is located inside the sliding port and is used to perform secondary cleaning of the laser emitting / receiving window of the laser ranging module body after the sliding cleaning component has been cleaned, scraping off stubborn stains.

[0009] Preferably, the wetting component includes a water-storing soft sleeve, which is fitted onto a fixed rod to store water. The water inlet on the soft sleeve is sealed by a plug. The surface of the soft sleeve has a water outlet, and a slow-wetting cloth is attached to the surface of the soft sleeve by Velcro to reduce the water flow rate from the outlet, allowing water to slowly wet the cleaning cloth.

[0010] Preferably, the water-storing sleeve has a damping ring internally connected to it, and the damping ring is sleeved on the fixing rod.

[0011] Preferably, the adjustment component includes a storage opening at the top of the sliding opening for storing parts. A drive gear is connected to the fixing rod, and a toothed plate is connected inside the storage opening. The drive gear meshes with the toothed plate to drive the fixing rod and the cleaning cloth on the water-retaining soft sleeve to rotate, squeeze, and scrape the laser emission / receiving window of the laser ranging module body for cleaning. The drive gear is driven to move inside the storage opening by a drive component.

[0012] Preferably, the driving component includes a driving rod, which is movably connected to the inner side of the fixed plate. Both ends of the driving rod extend into the interior of the storage opening and are connected to a winding reel. A pull belt is connected to the winding reel. A free-spinning sleeve is fitted on the surface of the fixed rod. The other side of the pull belt is wrapped around the free-spinning sleeve to drive the fixed rod to move. A micro motor is fixedly installed on the right side of the laser ranging module body, and the micro motor is connected to the inner side of the driving rod.

[0013] Preferably, a guide ring is connected to the inner side of the take-up reel to guide the pull belt falling into the take-up reel and stack them sequentially in the take-up reel for winding.

[0014] Preferably, the reset cleaning assembly includes a reset spring piece connected to a sliding block, and a silicone scraper is connected to the cleaning cloth for secondary scraping of the laser emitting / receiving window of the laser ranging module body after the cleaning cloth has been cleaned, effectively cleaning stubborn stains on it.

[0015] Preferably, a limiting rod is internally connected to the sliding port, and both the sliding block and the reset spring are slidably connected to the limiting rod.

[0016] Preferably, a protective baffle is connected to the fixing plate, and the protective baffle is located outside the cleaning cloth to protect it.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This invention integrates a sliding cleaning component, an adjustment component, and a reset cleaning component to achieve an automatic cleaning system that requires no manual intervention. It completely replaces the traditional manual ladder-climbing cleaning method, avoiding safety hazards such as falls and collisions from heights, saving manual travel time, and providing a fast cleaning response. It can automatically complete cleaning during the working intervals of height measuring devices, ensuring that the laser emission / receiving window of the laser ranging module is continuously clean. It is suitable for high-frequency usage scenarios such as medical examinations and smart height scales.

[0019] Furthermore, the sliding cleaning component and the wetting component work together for cleaning. The water-storing sleeve can pre-store cleaning water, and the seal with a plug ensures long-term water storage without frequent refilling. The slow-soaking cloth is removable and replaceable via Velcro, which can precisely control the water flow rate from the outlet, allowing the water to slowly soak the cleaning cloth and preventing water from leaving residue or seeping into the module and damaging electronic components. It also keeps the cleaning cloth moist, effectively softening dust, oil, and other contaminants. The fixed rod moves the cleaning cloth to wipe the window, while the damping ring enhances the connection strength between the fixed rod and the rotating water-storing sleeve. This allows the water-storing sleeve to be rolled by the fixed rod for cleaning during use. During the rolling process, it applies a pushing force to the cleaning cloth, mimicking a wiping motion to powerfully remove dirt from the laser emitting / receiving window of the laser ranging module. When the rotational force is too great, the damping ring can rotate on the surface of the fixed rod, allowing the cleaning cloth to move normally while the water-storing sleeve continues to apply pressure to the cleaning cloth, ensuring that the cleaning action is not affected during movement.

[0020] Furthermore, the reset spring automatically pushes the sliding block back to its initial position after cleaning, eliminating the need for an additional drive mechanism, simplifying the structure and reducing energy consumption. During the reset process, the silicone scraper can remove stubborn stains and residual water stains from the surface of the laser emission / reception window of the laser ranging module, forming a closed-loop cleaning process of wetting and softening, wiping, and secondary scraping, preventing residual contaminants from affecting laser reflection and reception. The protective baffle effectively blocks external dust and prevents the cleaning components from being damaged by external impacts. The limit rod provides precise guidance for the sliding block and reset spring, ensuring smooth and orderly cleaning and avoiding window wear or incomplete cleaning caused by misalignment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A;

[0024] Figure 4 This is an exploded three-dimensional schematic diagram of the wetting component of the present invention;

[0025] Figure 5 This is an exploded three-dimensional schematic diagram of the adjusting component of the present invention;

[0026] Figure 6 This is a three-dimensional cross-sectional structural diagram of the idler sleeve of the present invention.

[0027] In the diagram: 1. Laser ranging module body; 2. Fixing plate; 3. Sliding port; 4. Sliding cleaning assembly; 41. Sliding block; 42. Fixing rod; 43. Cleaning cloth; 44. Wetting assembly; 441. Water storage sleeve; 442. Water outlet; 443. Slow-soaking cloth; 5. Adjustment assembly; 51. Storage port; 52. Drive gear; 53. Tooth plate; 54. Drive component; 541. Drive rod; 542. Rewinding reel; 543. Pull belt; 544. Idle sleeve; 545. Micro motor; 6. Reset cleaning assembly; 61. Reset spring; 62. Silicone scraper; 7. Damping ring; 8. Guide ring; 9. Limiting rod; 10. Protective baffle. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 6 As shown, the present invention provides a laser ranging device for height measurement, including a laser ranging module body 1. The laser ranging module body 1 is characterized by having a fixing plate 2 connected to it, and a sliding opening 3 formed on the inner side of the fixing plate 2. It also includes...

[0030] The sliding cleaning component 4 is located inside the fixed plate 2 and is used to clean the laser emission window / receive window of the laser ranging module body 1.

[0031] The sliding cleaning component 4 includes a sliding block 41, and a fixed rod 42 is movably connected inside the sliding block 41. A cleaning cloth 43 is provided on the fixed rod 42. After the fixed rod 42 is wetted by the wetting component 44, it can easily soften the dust and dirt attached to the laser emission window / receive window of the laser ranging module body 1, making it easy to clean.

[0032] Adjustment component 5 is located inside the sliding port 3 and is used to drive the sliding cleaning component 4;

[0033] The reset cleaning component 6 is located inside the sliding port 3 and is used to perform secondary cleaning of the laser emission / receiving window of the laser ranging module body 1 after the sliding cleaning component 4 has been cleaned, scraping off stubborn stains.

[0034] Specifically, the laser ranging module body 1 is a YC01-S1 laser ranging module based on DTOF technology. It is fixed to the height measurement device at a high position through two mounting holes, and the terminal wiring is connected to the power supply. It communicates with the main control unit of the device through the TTL serial port. After power-on, it automatically starts 5Hz continuous measurement, emits 940nm laser and receives reflected signals, calculates the vertical distance between the module and the top of the subject's head, and transmits data in real time for height conversion. This laser ranging module is an existing mature product, so it will not be described in detail here. The sliding block 41 provides a stable mounting and moving carrier for the fixed rod 42, so that it can move smoothly along the sliding port 3 of the fixed plate 2, ensuring that the cleaning cloth 43 can fully cover the entire surface of the laser emission window / receive window and avoid cleaning dead corners. The fixed rod 42 is movably connected to the sliding block 41, providing a structural basis for the subsequent rotation cleaning action. With the flexible material of the cleaning cloth 43, it can not only avoid direct friction damage to the light-transmitting coating of the optical window, but also enhance the cleaning effect through close contact, replacing the randomness and instability of manual wiping.

[0035] like Figures 1 to 4 As shown, the wetting component 44 includes a water-storing soft sleeve 441, which is fitted onto the fixed rod 42 to store water. The water inlet on the soft sleeve 441 is sealed by a plug. The surface of the soft sleeve 441 has a water outlet 442. The surface of the soft sleeve 441 is attached with a slow-wetting cloth 443 by Velcro to reduce the water flow rate of the water outlet 442, so that the water flows out slowly to wet the cleaning cloth 43.

[0036] Specifically, the water-storing sleeve 441 is made of silicone. Sleeving it onto the fixing rod 42 does not affect the rotation and movement of the fixing rod 42, while also enabling long-term storage of clean water. Combined with a plug to seal the water inlet, it effectively prevents water leakage, reduces maintenance costs associated with frequent water replenishment, and meets the long-term stable operation requirements of the height and distance measuring device. The combination design of the water outlet 442 and the chronically soaked cloth 443, made of polyurethane fiber fabric, forms natural capillary channels through its extremely fine fiber pore structure, effectively reducing water flow speed and achieving slow, uniform water output. This prevents water from flowing too quickly, leaving water stains on the optical window that could affect laser reflection and reception, or seeping into the module and damaging electronic components. The Velcro connection allows the chronically soaked cloth 443 to be detachable and replaceable, facilitating cleaning of aging cloths or replacement with cloths of different materials, ensuring long-term stable wetting effects and solving the problem of uneven clean water supply.

[0037] like Figures 1 to 4As shown, a damping ring 7 is connected inside the water storage sleeve 441, and the damping ring 7 is sleeved on the fixed rod 42.

[0038] Specifically, the inner wall of the damping ring 7 and the outer surface of the fixing rod 42 have the same spline structure. This structure can significantly increase the contact friction between the two. As a buffer connection structure between the water-retaining soft sleeve 441 and the fixing rod 42, it enhances the connection stability of the two and ensures that the water-retaining soft sleeve 441 can be driven to roll synchronously when the fixing rod 42 rotates. This causes the cleaning cloth 43 to roll and press while moving in a straight line, mimicking the pressure of manual wiping and greatly improving the peeling effect on stubborn stains. On the other hand, when the rotation force exceeds the preset threshold, the contact friction of the spline structure cannot restrain the fixing rod 42. The damping ring 7 can rotate relative to the fixing rod 42, that is, the fixing rod 42 rotates freely inside the damping ring 7. This avoids the cleaning cloth 43 from excessively squeezing the optical window and causing wear to the light-transmitting coating due to excessive force. At the same time, it ensures the continuous pressure of the water-retaining soft sleeve 441 on the cleaning cloth 43, which not only strengthens the cleaning force but also effectively protects the optical window from damage.

[0039] like Figures 2 to 5 As shown, the adjustment component 5 includes a storage opening 51, which is located on top of the sliding opening 3 for storing parts. A drive gear 52 is connected to the fixing rod 42. A toothed plate 53 is connected inside the storage opening 51. The drive gear 52 meshes with the toothed plate 53 to drive the fixing rod 42 and the cleaning cloth 43 on the water-holding soft sleeve 441 to rotate, squeeze and scrape the laser emission window / receive window of the laser ranging module body 1 for cleaning, thereby increasing the cleaning power to remove dirt. The drive gear 52 is driven to move inside the storage opening 51 by the drive component 54.

[0040] Specifically, the storage opening 51 is located at the top of the sliding opening 3, providing a closed installation space for transmission components such as the toothed plate 53 and the winding reel 542. This prevents the components from being exposed to dust or damaged by external impacts, improving aesthetics and durability. The meshing design of the drive gear 52 and the toothed plate 53 cleverly transforms the linear movement of the sliding block 41 into the rotational power of the fixed rod 42. This allows the cleaning cloth 43 to simultaneously perform a composite cleaning action of linear movement for full coverage and rotational squeezing and scraping. Compared to wiping in one direction, this can more thoroughly remove adhesive stains from the surface of the optical window, significantly improving the thoroughness of cleaning. This transmission structure does not require an additional rotational drive source. Through the linkage of linear movement and rotation, it simplifies the structural design, reduces energy consumption, and ensures uniform and controllable cleaning force, solving the problems of uneven cleaning force and incomplete cleaning range in traditional manual cleaning.

[0041] like Figures 2 to 6As shown, the driving component 54 includes a driving rod 541, which is movably connected to the inner side of the fixed plate 2. Both ends of the driving rod 541 extend into the interior of the storage opening 51 and are connected to a winding reel 542. A pull belt 543 is connected to the winding reel 542. A free-spinning sleeve 544 is fitted on the surface of the fixed rod 42. The other side of the pull belt 543 is wrapped around the free-spinning sleeve 544 to drive the fixed rod 42 to move. A micro motor 545 is fixedly installed on the right side of the laser ranging module body 1. The micro motor 545 is connected to the inner side of the driving rod 541.

[0042] Specifically, the drive rod 541 is movably connected to the inside of the fixed plate 2, providing a stable mounting and rotation carrier for the take-up reel 542 and ensuring the stability of power transmission. The take-up reel 542 cooperates with the pull belt 543 to convert the rotational power of the micro motor 545 into the linear traction force of the sliding block 41. The take-up reel 542 synchronously takes up and releases the pull belt 543, ensuring that the sliding block 41 moves smoothly along the limit rod 9, so as to achieve uniform coverage and cleaning of the optical window by the cleaning cloth 43. The design of the idle sleeve 544 cleverly solves the problem of motion interference between the rotation of the fixed rod 42 and the take-up and release of the pull belt 543, ensuring that the rotation of the fixed rod 42 does not affect the transmission of the pull belt 543 and avoids entanglement and jamming.

[0043] like Figures 2 to 5 As shown, a guide ring 8 is connected to the inner side of the take-up reel 542, which is used to guide the pull belt 543 that falls into the take-up reel 542 and stack them sequentially in the take-up reel 542 for winding.

[0044] Specifically, the guide ring 8 adopts an annular inclined structure and is fixed inside the take-up reel 542. It can accurately guide and limit the pull belt 543 during the winding process, so that the pull belt 543 is stacked orderly on the take-up reel 542 along the circumference of the guide ring 8. This avoids the pull belt 543 from tangling, knotting or increased transmission resistance caused by winding misalignment, and ensures stable and reliable power transmission of the adjustment component 5. At the same time, orderly winding can reduce the wear of the pull belt 543, extend its service life, avoid the interruption of cleaning action due to transmission failure, ensure the long-term stable operation of the automatic cleaning function, and improve the reliability and durability of the device.

[0045] like Figures 2 to 5 As shown, the reset cleaning component 6 includes a reset spring 61, which is connected to the sliding block 41 for continuously pushing the sliding block 41 to reset after movement. A silicone scraper 62 is connected to the cleaning cloth 43 for secondary scraping of the laser emission window / receiver window of the laser ranging module body 1 after cleaning by the cleaning cloth 43, effectively cleaning stubborn stains on it.

[0046] Specifically, the reset spring 61 is fixed on the sliding block 41. After cleaning, without the need for an additional drive mechanism, the sliding block 41 can be pushed back to its initial position along the limit rod 9 by its own elastic restoring force. This simplifies the device structure, reduces energy consumption, and enables the automatic reset of the cleaning components, preparing them for the next cleaning. The silicone scraper 62 is fixed on the cleaning cloth 43. It is soft yet has a certain degree of hardness. During the reset process, it can closely adhere to the surface of the optical window and scrape off stubborn stains and residual water stains that were not completely removed by the cleaning cloth 43. This forms a closed-loop cleaning process of wetting and softening, compound wiping, and secondary scraping, which completely eliminates the residue of contaminants and ensures that the optical path is unobstructed. At the same time, the silicone scraper 62 makes gentle contact with the optical window and will not cause scratches, solving the technical pain point that water stains and stubborn stains remain after traditional cleaning, affecting the measurement accuracy.

[0047] like Figures 2 to 5 As shown, the sliding port 3 is internally connected to a limiting rod 9. The sliding block 41 and the reset spring 61 are both slidably connected to the limiting rod 9. The limiting rod 9 serves to limit the reset spring 61 and the sliding block 41, so that they are stably placed inside the sliding port 3 for application.

[0048] Specifically, the limiting rod 9 is fixed inside the sliding opening 3, providing a precise guide trajectory for the movement of the sliding block 41 and the extension and retraction of the reset spring 61. This ensures that the sliding block 41 always moves in a direction parallel to the optical window, preventing the cleaning cloth 43 from failing to cover the entire window area due to offset, or causing damage to the light-transmitting coating due to excessive pressure on the window. At the same time, the limiting rod 9 limits the reset spring 61, restricting its deformation direction and ensuring that the elastic force can be accurately applied to the sliding block 41, achieving stable and rapid reset. In addition, the limiting rod 9 can also enhance the connection stability between the sliding block 41 and the sliding opening 3, preventing the sliding block 41 from shaking or getting stuck during the cleaning process, and ensuring that the cleaning action is smooth and orderly.

[0049] like Figures 1 to 4 As shown, a protective baffle 10 is connected to the fixed plate 2. The protective baffle 10 is located outside the cleaning cloth 43 to protect it from dust contamination.

[0050] Specifically, the protective baffle 10 is fixed on the fixed plate 2 and located outside the cleaning cloth 43, forming a protective space. On the one hand, it can effectively prevent external dust and debris from falling directly onto the cleaning cloth 43 and the optical window surface, reducing the cleaning frequency, extending the service life of the cleaning cloth 43, and reducing maintenance costs. On the other hand, it can prevent the cleaning components from being damaged by external impacts or scratches when not in operation, ensuring the structural integrity of the cleaning mechanism. At the same time, the design of the protective baffle 10 does not affect the movement and rotation of the cleaning cloth 43 during the cleaning process. While protecting the components, it does not interfere with the realization of the cleaning function, further optimizing the durability and practicality of the device, and adapting to the usage scenarios where height and distance measuring devices are exposed to the environment for a long time.

[0051] The working process of the technical solution provided by this invention is as follows:

[0052] When the laser ranging module body 1 is fixed at a height on the height measuring device and is performing height ranging normally, if the laser emitting / receiving window experiences a decrease in backlight intensity due to dust or oil, an automatic cleaning process is triggered: After the micro motor 545 is started by the controller, the drive rod 541 drives the winding reel 542 to wind up the pull belt 543, pulling the fixed rod 42 to move, and the sliding block 41 moves smoothly along the limit rod 9. At the same time, the drive gear 52 meshes with the toothed plate 53, causing the fixed rod 42 to rotate through the spline-shaped damping ring 7 and the water-retaining soft sleeve 441. The water-retaining soft sleeve 441 slowly wets the cleaning cotton cloth 43 through the polyurethane fiber chronically soaked cloth 443, causing the cleaning cotton cloth 43 to move in a straight line. Simultaneously, rolling pressure is applied to wet and soften the laser emitting / receiving window of the laser ranging module body 1 and perform composite wiping. After cleaning to the end of the sliding port 3, the micro motor 545 stops, the reset spring 61 pushes the sliding block 41 to reset, and simultaneously drives the silicone scraper 62 to scrape away stubborn stains a second time. Finally, the sliding cleaning component 4 returns to its initial position, and the protective baffle 10 re-protects the cleaning components. This process does not require manual ladder operation. Through the cooperation of various components, the automatic closed-loop cleaning of the laser window is achieved, which not only avoids the safety hazards of cleaning at heights and improves cleaning efficiency, but also ensures that the window is clean to maintain the module's measurement accuracy of ±3mm, which is suitable for the long-term stable high-frequency use requirements of height ranging equipment.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser ranging device for height measurement, comprising a laser ranging module body (1), characterized in that, A fixing plate (2) is connected to the main body (1) of the laser ranging module. A sliding opening (3) is provided on the inner side of the fixing plate (2). The sliding cleaning component (4) is disposed on the inner side of the fixed plate (2) and is used to clean the laser emitting window / receiving window of the laser ranging module body (1); The sliding cleaning component (4) includes a sliding block (41), and a fixed rod (42) is movably connected inside the sliding block (41). A cleaning cloth (43) is provided on the fixed rod (42). After the fixed rod (42) wets the cleaning cloth (43) through the wetting component (44), it can easily soften the dust and dirt attached to the laser emission window / receiver window of the laser ranging module body (1) for easy cleaning. Adjustment component (5), which is disposed inside the sliding port (3) and is used to drive the sliding cleaning component (4); The reset cleaning component (6) is located inside the sliding port (3) and is used to perform secondary cleaning of the laser emission window / receiver window of the laser ranging module body (1) after the sliding cleaning component (4) has been cleaned, scraping off stubborn stains.

2. The laser rangefinder device for height measurement according to claim 1, characterized in that: The wetting component (44) includes a water-storing soft sleeve (441), which is fitted onto the fixed rod (42) to store water. The water inlet on the soft sleeve (441) is sealed with a plug. The surface of the soft sleeve (441) has a water outlet (442). The surface of the soft sleeve (441) is attached with a slow-wetting cloth (443) by Velcro to reduce the water flow rate of the water outlet (442) so that the water flows out slowly to wet the cleaning cloth (43).

3. The laser rangefinder device for height measurement according to claim 2, characterized in that: The water-storing soft sleeve (441) is internally connected to a damping ring (7), which is sleeved on the fixing rod (42).

4. The laser rangefinder device for height measurement according to claim 1, characterized in that: The adjustment component (5) includes a storage opening (51), which is located at the top of the sliding opening (3) for storing parts. A drive gear (52) is connected to the fixing rod (42). A toothed plate (53) is connected inside the storage opening (51). The drive gear (52) meshes with the toothed plate (53) to drive the fixing rod (42) and the cleaning cloth (43) on the water-retaining soft sleeve (441) to rotate, squeeze, and scrape the laser emission window / receiver window of the laser ranging module body (1) for cleaning. The drive gear (52) is driven to move inside the storage opening (51) by the drive component (54).

5. A laser rangefinder device for height measurement according to claim 4, characterized in that: The driving component (54) includes a driving rod (541), which is movably connected to the inside of the fixed plate (2). Both ends of the driving rod (541) extend into the inside of the storage opening (51) and are connected to a winding reel (542). A pull belt (543) is connected to the winding reel (542). A free-spinning sleeve (544) is fitted on the surface of the fixed rod (42). The other side of the pull belt (543) is wrapped around the free-spinning sleeve (544) to drive the fixed rod (42) to move. A micro motor (545) is fixedly installed on the right side of the laser ranging module body (1). The micro motor (545) is connected to the inside of the driving rod (541).

6. A laser rangefinder for height measurement according to claim 5, characterized in that: The inner side of the take-up reel (542) is connected to a guide ring (8), which is used to guide the pull belt (543) falling into the take-up reel (542) and stack them in the take-up reel (542) for winding.

7. A laser rangefinder device for height measurement according to claim 1, characterized in that: The reset cleaning component (6) includes a reset spring (61), which is connected to a sliding block (41). A silicone scraper (62) is connected to the cleaning cloth (43) for secondary scraping of the laser emission window / receiver window of the laser ranging module body (1) after the cleaning cloth (43) has been cleaned, effectively cleaning stubborn stains on it.

8. A laser rangefinder for height measurement according to claim 7, characterized in that: The sliding port (3) is internally connected to a limiting rod (9), and the sliding block (41) and the reset spring (61) are both slidably connected to the limiting rod (9).

9. A laser rangefinder device for height measurement according to claim 1, characterized in that: A protective baffle (10) is connected to the fixing plate (2), and the protective baffle (10) is located outside the cleaning cloth (43) to protect it.

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