A ranging device for real estate surveying

Abstract

The utility model discloses a kind of ranging device for real estate surveying and mapping, belong to surveying and mapping equipment technical field;Including: support platform;Laser range finder, set in the support platform;Protective cover, set in the support platform, the laser range finder is located in the protective cover;Laser penetration hole, open in the front of the protective cover, the laser ray emitted by the laser range finder just passes through the laser penetration hole.Laser range finder for ranging is provided with protective cover, for isolating laser range finder and dust in construction environment and other easy to adhere to contaminant, meanwhile, the protective cover will not affect the normal emission and acceptance of laser range finder laser, will not hinder ranging normal progress;Solved the laser range finder in complex environment easy to adhere to dust, cause to affect laser range finder internal component normal work and laser source probe place accumulated dust affect laser source normal emission and reflection problem.

Description

Technical Field

[0001] This utility model belongs to the field of surveying equipment technology, specifically relating to a distance measuring device for real estate surveying. Background Technology

[0002] In real estate surveying, accurate distance measurement is an important surveying method to obtain accurate information about real estate and ensure clear property rights; for some real estate buildings with a long service life, monitoring the distance between walls is also an important basis for judging whether the main structure of the building has settled and deformed. The main methods for measuring distances between buildings include total stations, laser rangefinders, and rangefinder vehicles equipped with rangefinders. Among these, the most flexible and accurate method for measuring distances between buildings is the laser rangefinder. Laser rangefinders calculate distances using the time difference of laser reflection, so the successful transmission and return of the laser in unobstructed conditions is crucial for accurate distance measurement. However, when measuring distances between unfinished buildings or buildings on construction sites, there may be a lot of dust in the surrounding environment. This dust can adhere to the laser rangefinder and may even enter the laser rangefinder through gaps, affecting the normal operation of the components inside the laser rangefinder. In addition, dust may accumulate at the laser source probe, affecting the transmission and reception of the laser ranging signal. Some large dust particles may also cause wear and scratches to the laser source probe. Summary of the Invention

[0003] This utility model provides a ranging device for real estate surveying. A protective cover is provided for the laser rangefinder used for ranging to isolate the laser rangefinder from dust and other easily adhering pollutants in the construction environment. At the same time, the protective cover does not affect the normal emission and reception of the laser of the laser rangefinder, and does not hinder the normal ranging operation. It solves the problem that the laser rangefinder is prone to dust adhesion in complex environments, which affects the normal operation of the internal components of the laser rangefinder and the accumulation of dust at the laser source probe affects the normal emission and reflection of the laser source.

[0004] To achieve the above-mentioned technical objectives, this utility model is implemented through the following technical solution: A distance measuring device for real estate surveying, comprising: supporting platform; A laser rangefinder is mounted on the support platform; A protective cover is provided on the support platform, and the laser rangefinder is located inside the protective cover; A laser penetration hole is provided on the front of the protective cover, through which the laser beam emitted by the laser rangefinder passes.

[0005] Preferably, the front of the protective cover is an open structure, and a protective cover plate insertion groove is formed inside the upper edge of the open structure of the protective cover. Sliding grooves are formed on both sides of the protective cover plate insertion groove. The first end of the sliding groove extends out of the protective cover plate insertion groove, and a circular groove is formed in the extended part, which communicates with the sliding groove. The protective cover plate is movably installed in the groove, and an embedded post is provided on each side of the second end near the protective cover plate. The embedded post is movably installed in the sliding groove. The protective cover has a laser penetration hole; when the protective cover is flipped over to completely cover the front of the protective cover, the laser beam emitted by the laser rangefinder can just pass through the laser penetration hole.

[0006] Preferably, a magnetic piece is provided on each of the left and right sides of the front of the protective cover; a magnetic metal piece is provided at each contact position between the protective cover and the left and right sides of the front of the protective cover.

[0007] Preferably, a slide rail is provided on each of the left and right sides of the support platform; sliding side frames are provided on the lower edges of the left and right sides of the protective cover corresponding to the slide rails, and the sliding side frames are movably mounted on the slide rails; The protective cover can slide relative to the support platform by cooperating with the slide rail and the sliding side frame.

[0008] Preferably, a U-shaped notch is formed on the front of the support platform; The front of the laser rangefinder is aligned with the bottom surface of the "U"-shaped notch. The bottom surface of the laser rangefinder is not connected to the surface of the support platform, and the front surface of the laser rangefinder is connected to the bottom surface of the "U"-shaped notch through a hinged joint.

[0009] Preferably, a baffle plate insertion groove is provided on the bottom surface of the "U"-shaped notch, and the baffle plate is movably installed in the insertion groove as a pull-out baffle plate.

[0010] Preferably, a level sensor and two sets of level indicator lights are provided on either the left or right side of the protective cover; The level sensor is communicatively connected to the input of the microprocessor, and the output of the microprocessor is communicatively connected to the two sets of level indicator lights.

[0011] Preferably, a telescopic rod is centrally mounted on the lower surface of the support platform via a detachable structure; The detachable structure includes: A threaded groove is centrally located on the lower surface of the support platform; A threaded rod is provided at the upper end of the telescopic rod; The threaded rod is installed in the threaded groove through a threaded fit, realizing a detachable connection between the telescopic rod and the support platform.

[0012] Preferably, the protective cover has detachable universal suction cups on its back and top surfaces; The universal joint suction cup includes: The ball shaft groove has an internal spherical hollow groove structure; The ball shaft is movably disposed within a spherical hollow groove structure inside the ball shaft groove; The upper suction cup rod has a first end set on the surface of the ball shaft and a second end set with an upper suction cup; A hollow channel is formed inside the upper suction cup column, and the opening end of the hollow channel is formed inside the upper suction cup; The lower suction cup rod has a first end located on the bottom surface of the ball joint groove and a lower suction cup located at the second end. A hollow channel is formed inside the lower suction cup column rod, and the opening end of the hollow channel is formed inside the lower suction cup; The negative pressure suction end is respectively set on the upper suction cup column and the lower suction cup column, and the negative pressure suction end is connected to the hollow channel inside the upper suction cup column and the lower suction cup column.

[0013] Preferably, a ring of built-in slots is formed around the laser source probe on the front of the laser rangefinder; The built-in slot has a detachable built-in plug, and the first end of the probe-type laser channel is centrally located on the front of the built-in plug. The probe-type laser channel communicates with the interior of the built-in plug; The built-in plug is inserted into the built-in slot, and the laser beam emitted by the laser source probe can pass through the probe-type laser channel.

[0014] The beneficial effects of this utility model are: A distance measuring device for real estate surveying includes a laser rangefinder mounted on a support platform. A protective cover is installed on the support platform, and the laser rangefinder is placed inside the protective cover. A laser penetration hole is provided on the protective cover so that the laser beam emitted by the laser rangefinder can pass through the laser penetration hole. The protective cover can shield against dust and other pollutants in the measurement environment, preventing dust from seeping into the laser rangefinder and affecting the operation of the internal components, or from accumulating at the laser source probe and affecting the emission and reflection of the laser beam. The bottom of the support platform is equipped with a detachable telescopic rod, which makes it convenient to take measurements in some deep or high places that are inaccessible to operators. The protective cover is equipped with a level sensor and two sets of level indicator lights on the side. For some uneven walls with bumps and inclinations, directly attaching the device to the wall will result in the device being tilted as well, leading to inaccurate measurement results. Therefore, the level sensor is used to monitor the placement of the device, making it easier to adjust the device to a horizontal position. At the same time, the level sensor can also indirectly indicate whether the wall surface is flat. The laser rangefinder has a detachable probe-type laser channel around its laser source probe. The laser beam can pass through this probe-type laser channel. For some slit channels where the depth is not convenient to adjust the device to make the laser beam just align with the slit, the probe-type laser channel can be directly inserted into the slit. In this case, the laser beam will definitely pass through the probe-type laser channel and be located in the slit for measurement, preventing the laser beam from being blocked. A universal suction cup can be detachably installed on the top or back of the protective cover. The universal suction cup can be used to attach the device to the wall or ceiling, and the device can be adjusted to the optimal measurement position. The device can be attached and fixed to achieve stable measurement without human intervention, and can be used to monitor long-term data on building aging conditions such as wall settlement. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the protective cover of this utility model, which completely covers the front of the protective cover after the protective cover is flipped up, with the laser rangefinder located inside the protective cover. Figure 3 This is a schematic diagram showing the structural relationship between the protective cover and the protective shield of this utility model; Figure 4 This is a schematic diagram of the detachable connection structure between the bottom surface of the support platform and the telescopic rod of this utility model; Figure 5 This is a schematic diagram of the universal joint suction cup structure of this utility model; Figure 6 This is a schematic diagram of the built-in slots around the laser source probe and the built-in plugs on the probe-type laser channel of this utility model. Figure 7 This is a schematic diagram of the structure of the probe-type laser channel of this utility model set on a laser rangefinder; In the attached diagram, the structural names represented by each number are as follows: 1-Support platform, 101-Slide rail, 102-Pull-out shield, 103-Shield slot, 104-Threaded groove, 2-Laser rangefinder, 201-Laser source probe, 202-Built-in slot, 3-Protective cover, 301-Protective cover plate, 3011-Laser penetration hole, 3012-Embedded column, 302-Protective cover slot, 3021-Sliding groove, 3022-Circular groove, 30 3-Magnetic suction plate, 304-Sliding side frame, 4-Level sensor, 401-Level indicator light, 5-Telescopic rod, 501-Threaded rod, 6-Universal suction cup, 601-Upper suction cup, 602-Lower suction cup, 603-Ball shaft groove, 604-Ball shaft, 605-Upper suction cup column rod, 606-Lower suction cup column rod, 607-Negative pressure suction end, 7-Probe-type laser channel, 701-Built-in plug. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1 A distance measuring device for real estate surveying, such as Figure 1 As shown, it includes: a support platform 1, a laser rangefinder 2 mounted on the support platform 1, and a laser source probe 201 mounted on the front of the laser rangefinder 2. The laser rangefinder 2 is an existing ranging product, and those skilled in the art know its structure and working principle, so it will not be described in detail here. A protective cover 3 is installed on the support platform 1, and the laser rangefinder 2 is installed inside the protective cover 3. The protective cover 3 protects the laser rangefinder 2. When used in a bare house or a house under construction, the protective cover 3 can isolate dust and other pollutants, preventing dust from adhering to the laser rangefinder 2 or even entering the laser rangefinder 2 and adhering to the integrated components, causing physical wear and electrical interference to the components. Blockage inside the components can also affect heat dissipation. The laser rangefinder 2 relies on the reflection of laser rays after encountering obstacles to measure distance. Therefore, the unobstructed emission and reflection of laser rays are very important for the accuracy of the measurement results. Since the protective cover 3 completely covers the laser rangefinder 2, in order to ensure that the laser rays emitted by the laser rangefinder 2 can be successfully emitted and then successfully reflected back, a laser penetration hole 3011 is opened on the front of the protective cover 3. The laser rays emitted by the laser source probe 201 of the laser rangefinder 2 can just pass through the laser penetration hole 3011. During measurement, simply attach the back of the support platform 1 to the wall or ground. The distance between the laser source probe 201 and the back of the support platform 1 is fixed. The laser rangefinder 2 emits a laser beam, which passes through the laser penetration hole 3011, and is reflected after reaching the target obstacle. The final distance is displayed on the laser rangefinder 2. In a preferred embodiment, when the device is not in use, or in a clean and ideal environment, the complete enclosure of the protective cover 3 is not conducive to the heat dissipation of the laser rangefinder 2; therefore, as Figure 2 as well as Figure 3 As shown, the front of the protective cover 3 is set as an open structure. A protective cover plate insertion groove 302 is opened inside the upper edge of the open structure. Sliding grooves 3021 are opened on both sides of the protective cover plate insertion groove 302. The first end of the sliding groove 3021 extends out of the protective cover plate insertion groove 302. A circular groove 3022 is opened in the extended part. The circular groove 3022 communicates with the sliding groove 3021. A removable protective cover 301 is inserted into a groove 302. An embedded post 3012 is located on each side of the second end of the protective cover 301. When the protective cover 301 is in the groove 302, the embedded post 3012 is movably positioned within a sliding groove 3021. The protective cover 301 can be freely pushed and pulled horizontally. After the protective cover 301 is fully pulled out, the embedded post 3012 enters the circular groove 3022, allowing the protective cover 301 to be rotated 90°. At this point, the protective cover 301 completely covers the open structure on the front of the protective cover 3, protecting the laser rangefinder 2 inside. A laser penetration hole 3011 is provided on the protective cover plate 301; when the protective cover plate 301 is flipped over to completely cover the front of the protective cover 3, the laser beam emitted by the laser rangefinder 2 can just pass through the laser penetration hole 3011.

[0019] In a preferred embodiment, to ensure the protective cover 301 is fixed in place and to prevent the protective cover 301 from shaking and affecting the laser beam's exit from the laser penetration hole 3011, such as... Figure 3 As shown, a magnetic absorbing piece 303 is provided on each of the left and right sides of the front of the protective cover 3, and a magnetic metal piece is provided at each contact position between the protective cover 301 and the left and right sides of the front of the protective cover 3. When the protective cover 301 is flipped over to cover the front of the protective cover 3, the magnetic absorbing piece 303 and the magnetic metal piece are attracted to each other, so that the protective cover 301 is fixed. The fixed protective cover 301 will not shake, and the position of the laser penetration hole 3011 on it is fixed, ensuring that the laser can pass smoothly out from the laser penetration hole 3011.

[0020] When it is necessary to open the front of the protective cover 3, simply rotate the protective cover 301 90° and then push the protective cover 301 into the protective cover insertion groove 302.

[0021] Example 2 Based on Embodiment 1, in Embodiment 1, the front of the protective cover 3 is set as an open structure, and a protective cover 301 is set on the open structure. The opening and closing of the protective cover 301 can achieve the complete closure or front opening of the protective cover 3. However, in any case, the laser rangefinder 2 is always located inside the protective cover 3 and cannot be completely exposed. When using it in a clean environment or when the laser rangefinder 2 needs to be repaired such as battery replacement, the shielding of the protective cover 3 is not required. Therefore, in this embodiment, the protective cover 3 is configured to slide and move on the support platform 1, and its position can be moved from directly above the laser rangefinder 2 to away from the laser rangefinder 2; like Figure 1 As shown, a slide rail 101 is provided on each of the left and right sides of the support platform 1; a sliding side frame 304 is provided on the lower edge of the left and right sides of the protective cover 3 corresponding to the slide rail 101, and the sliding side frame 304 is movably mounted on the slide rail 101; the sliding movement of the protective cover 3 relative to the support platform 1 can be realized through the cooperation of the slide rail 101 and the sliding side frame 304.

[0022] like Figure 3 As shown, a U-shaped notch is formed on the front of the support platform 1; the front of the laser rangefinder 2 is aligned with the bottom surface of the U-shaped notch. The bottom surface of the laser rangefinder 2 is not connected to the surface of the support platform 1. The front surface of the laser rangefinder 2 is connected to the bottom surface of the "U"-shaped notch through a hinge. The hinge connection structure allows the laser rangefinder 2 to be rotated 90°. In some special scenarios, the entire device needs to be placed against the top for measurement. In this case, the laser rangefinder 2 is rotated 90° and the top surface of the protective cover 3 is placed against the top for measurement. like Figure 3 As shown, a magnetic absorbing piece 303 is also set on the front of the support platform 1 on both sides of the "U" shaped notch. The protective cover 3 is moved to the top of the laser rangefinder 2. After the protective cover plate 301 is pulled out and rotated 90°, the front of the protective cover 3 is exposed and covered. At this time, the lower edge of the protective cover plate 301 is flush with the lower edge of the support platform 1. At the contact position between the protective cover plate 301 and the front of the support platform 1, a magnetic metal piece is also set on the corresponding magnetic absorbing piece. The magnetic absorbing piece and the magnetic metal piece can be used to fix the lower edge of the protective cover plate 301 by magnetic attraction. After the protective cover 301 covers the open front structure of the protective cover 3, the notch and slot are not yet covered; for example Figure 3 As shown, a baffle plate insertion groove 103 is opened on the bottom surface of the "U"-shaped notch groove, and a pull-out baffle plate 102 is movably installed in the baffle plate insertion groove 103. After the pull-out baffle plate 102 is pulled out, it covers the "U"-shaped notch groove to prevent dust from entering the protective cover 3 from the "U"-shaped notch groove.

[0023] Example 3 Based on Embodiment 1 or Embodiment 2, in the above two embodiments, during measurement, the back of the support platform 1 is attached to the wall surface or the top surface of the protective cover 3 is attached to the ceiling or floor surface. When the wall surface is uneven or tilted, if the device is directly attached to the wall surface, the entire device will also be tilted, which cannot reflect the true distance between the two walls, and the measurement results will have significant errors. Figure 1 As shown, a level sensor 4 and a level indicator light 401 are installed on either the left or right side of the protective cover 3. The level sensor 4 is connected to the input terminal of the microprocessor, and the level indicator light 401 is connected to the output terminal of the microprocessor. Two sets of level indicator lights 401 are provided, which can indicate green light and red light respectively. Green light indicates that the current device is in a level state, and red light indicates that the current device is out of level. After the device is attached to the wall, if the green light is on, it indicates that the wall is relatively flat and the device is level. If the red light is on, it indicates that the wall may be uneven. In this case, the device needs to be adjusted until the green light is on, so that the device is level. By monitoring the level, the placement of the device can be adjusted in time to reduce the error of the measurement results.

[0024] Example 4 like Figure 1 As shown, universal suction cups 6 are installed on the top and back of the protective cover 3. The device can be attached to the wall or ceiling by means of the universal suction cups 6. Stable measurement without human intervention can be achieved by fixed attachment. It can be used to monitor long-term data on building aging such as wall settlement. like Figure 5 As shown, the universal joint suction cup 6 includes: a ball joint groove 603, with a spherical hollow groove structure inside the ball joint groove 603; a ball joint 604 is movably arranged inside the spherical hollow groove structure, and the ball joint 604 can rotate arbitrarily within the ball joint groove 603; the space between the ball joint 604 and the ball joint groove 603 is filled with damping oil, which is a highly stable silicone oil with an adjustable viscosity coefficient; an upper suction cup rod 605 is arranged above the ball joint 604, with one end of the upper suction cup rod 605 disposed on the surface of the ball joint 604 and the second end connected to the upper suction cup 601; a hollow channel is formed inside the upper suction cup rod 605, and the opening end of the hollow channel is formed inside the upper suction cup 601; A lower suction cup rod 606 is installed below the ball joint groove 603. The first end of the lower suction cup rod 606 is connected to the bottom surface of the ball joint groove 603, and the second end is connected to the lower suction cup 602. A hollow channel is opened inside the lower suction cup rod 606, and the opening end of the hollow channel is opened inside the lower suction cup 602. Negative pressure suction ends 607 are provided on both the upper suction cup rod 605 and the lower suction cup rod 606. The negative pressure suction ends 607 are connected to the hollow channels inside the upper suction cup rod 605 and the lower suction cup rod 606. The upper suction cup 601 is attached to the wall, floor or ceiling, and the lower suction cup 602 is attached to the top or back of the protective cover 3. The internal air is extracted by the negative pressure suction ends 607, so that negative pressure is formed inside the suction cup, and the suction cup is stably attached. Since the ball shaft 604 can rotate freely within the ball shaft groove 603, and there is a damping effect between the ball shaft 604 and the ball shaft groove 603, after adsorption, it is adjusted to the optimal distance measuring position by the ball shaft adjustment device and kept in this fixed position.

[0025] Example 5 For locations that are inaccessible to operators, such as deep or high places, where it is inconvenient to carry and place the equipment; such as Figure 1 As shown, a telescopic rod 5 is detachably installed below the support platform 1; as Figure 4 As shown, the detachable connection structure is configured as follows: a threaded groove 104 is provided in the center of the bottom surface of the support platform 1, and a threaded rod 501 is provided at the top of the telescopic rod 5. The threaded rod 501 is provided in the threaded groove 104 through threaded engagement, so as to realize the detachable connection between the telescopic rod 5 and the bottom surface of the support platform 1. When it is necessary to measure a location that is inconvenient to reach, simply extend the telescopic rod 5 and carry the device to the location to be measured by holding the telescopic rod 5.

[0026] Example 6 For measuring the depth of a narrow gap in a building, it is not convenient to directly adjust the device to make the laser beam exactly align with the gap. Because the gap is narrow, it is difficult to observe the position of the laser beam. When the device is offset, the laser beam will be blocked and cannot pass through the gap smoothly for distance measurement. like Figure 6 as well as Figure 7 As shown, a ring of built-in slots 202 is opened around the laser source probe 201 on the front of the laser rangefinder 2. A built-in plug 701 is detachably installed in the built-in slots 202. The first end of the probe-type laser channel 7 is set in the center of the front of the built-in plug 701. The probe-type laser channel 7 communicates with the inside of the built-in plug 701. When the built-in plug 701 is inserted into the built-in slots 202, the laser beam emitted by the laser source probe 201 can just pass through the probe-type laser channel 7. like Figure 7The diagram shows the state of the probe-type laser channel 7 installed on the laser rangefinder 2. For measuring the slit depth, the probe-type laser channel 7 can be directly inserted into the slit. The laser beam is emitted from the probe-type laser channel 7, and after reaching the obstacle, it is reflected back to measure the slit depth. The probe-type laser channel 7 is directly inserted into the slit, which can ensure that the laser beam is transmitted within the slit and prevent the laser beam from being blocked.

Claims

1. A distance measuring device for real estate surveying, comprising: supporting platform; A laser rangefinder is mounted on the support platform; Its characteristic is that it further includes: A protective cover is provided on the support platform, and the laser rangefinder is located inside the protective cover; A laser penetration hole is provided on the front of the protective cover, through which the laser beam emitted by the laser rangefinder passes.

2. A range finder for use in surveying real property as defined in claim 1, wherein The protective cover has an open front structure. A protective cover plate insertion groove is opened inside the upper edge of the open structure of the protective cover. Sliding grooves are opened on both sides of the protective cover plate insertion groove. The first end of the sliding groove extends out of the protective cover plate insertion groove. A circular groove is opened in the extended part, and the circular groove communicates with the sliding groove. The protective cover plate is movably installed in the groove, and an embedded post is provided on each side of the second end near the protective cover plate. The embedded post is movably installed in the sliding groove. The protective cover has a laser penetration hole; after the protective cover is flipped over to completely cover the front of the protective cover, the laser beam emitted by the laser rangefinder can just pass through the laser penetration hole.

3. A range finder for use in surveying real property as defined in claim 2 wherein, A magnetic piece is provided on each of the left and right sides of the front of the protective cover; a magnetic metal piece is provided at each of the contact positions between the protective cover and the left and right sides of the front of the protective cover.

4. The range finder of claim 1, wherein A slide rail is provided on each of the left and right sides of the support platform; a sliding side frame is provided on the lower left and right sides of the protective cover corresponding to the slide rail, and the sliding side frame is movably mounted on the slide rail.

5. A distance measuring device for real estate surveying according to claim 1, characterized in that, A U-shaped notch is provided on the front of the support platform; The front of the laser rangefinder is aligned with the bottom surface of the "U"-shaped notch. The bottom surface of the laser rangefinder is not connected to the surface of the support platform, and the front surface of the laser rangefinder is connected to the bottom surface of the "U"-shaped notch through a hinged joint.

6. A range finder for use in surveying real property as defined in claim 5, wherein The bottom surface of the "U"-shaped notch has a baffle plate insertion slot, and the baffle plate is movably installed in the slot as a pull-out baffle plate.

7. The range finder of claim 1, wherein: A level sensor and two sets of level indicator lights are installed on either the left or right side of the protective cover. The level sensor is communicatively connected to the input of the microprocessor, and the output of the microprocessor is communicatively connected to the two sets of level indicator lights.

8. The range finder of claim 1, wherein: The bottom surface of the support platform is equipped with a telescopic rod centered through a detachable structure; The detachable structure includes: A threaded groove is centrally located on the lower surface of the support platform; A threaded rod is provided at the upper end of the telescopic rod; The threaded rod is set in the threaded groove through a threaded engagement.

9. The range finder of claim 1, wherein, The protective cover has detachable universal suction cups on its back and top surfaces; The universal joint suction cup includes: The ball shaft groove has an internal spherical hollow groove structure; The ball shaft is movably disposed within a spherical hollow groove structure inside the ball shaft groove; The upper suction cup rod has a first end set on the surface of the ball shaft and a second end set with an upper suction cup; A hollow channel is formed inside the upper suction cup column, and the opening end of the hollow channel is formed inside the upper suction cup; The lower suction cup rod has a first end located on the bottom surface of the ball joint groove and a lower suction cup located at the second end. A hollow channel is formed inside the lower suction cup column rod, and the opening end of the hollow channel is formed inside the lower suction cup; The negative pressure suction end is respectively set on the upper suction cup column and the lower suction cup column, and the negative pressure suction end is connected to the hollow channel inside the upper suction cup column and the lower suction cup column.

10. The range finder of claim 1, wherein, The laser rangefinder has a built-in slot around the laser source probe on the front. The built-in slot has a detachable built-in plug, and the first end of the probe-type laser channel is centrally located on the front of the built-in plug. The probe-type laser channel communicates with the interior of the built-in plug; The built-in plug is inserted into the built-in slot, and the laser beam emitted by the laser source probe can pass through the probe-type laser channel.

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