Handheld laser range finder

Abstract

The invention relates to the technical field of laser range finders, in particular to a handheld laser range finder. The handheld laser range finder comprises a shell, a gradienter, a key set, a laser transmitter, a protection plate, a display screen and the like, the gradienter is installed on the top of the shell, the key set is installed on the right side of the lower portion of the shell, a controller is installed on the lower portion of the shell, and the display screen used for displaying data is installed on the front side of the upper portion of the shell. The right side of the upper part in the housing is provided with a laser emitter, and the right side of the laser emitter is connected with a protection plate. The protection plate is arranged to protect the laser transmitter, the soft cover covers the protection plate, the surface of the protection plate can be prevented from being stained with dust and scratched, in the using process, the pushing block is pressed, the wiping strip can drive the soft cover to be folded outwards, the wiping strip can also wipe and clean the surface of the protection plate, it is guaranteed that laser is accurately emitted, and operation is easy and fast.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser range finders, in particular to a handheld laser range finder. BACKGROUND

[0002] The handheld laser range finder is an instrument for accurately measuring the distance of a target by using laser. When the laser range finder works, a very thin laser beam is shot at the target, the laser beam reflected by the target is received by a photoelectric element, and a timer measures the time from the emission to the reception of the laser beam, so that the distance from the observer to the target is calculated.

[0003] The patent No. CN215415886U discloses a handheld laser range finder, which comprises a range finder body, a re-measuring mechanism, a laser emitter, a connector, a storage battery and a re-measuring switch.

[0004] The above-mentioned patent has the following disadvantages: when the laser range finder is used, the surface of the laser emitter lens is easy to be scratched and stained with dust, which affects the emission and reception of the laser and ultimately affects the accuracy of the measurement data. Moreover, after the surface of the laser emitter is stained with dust, manual operation is needed for cleaning, which is troublesome. SUMMARY

[0005] In order to overcome the above-mentioned shortcomings, the application provides a handheld laser range finder.

[0006] The technical solution is as follows: A handheld laser rangefinder includes a housing, a level, a button assembly, a laser emitter, a protective plate, a display screen, a rubber block, and protective components. The level is mounted on the top of the housing. A button assembly, consisting of multiple buttons, is mounted on the lower right side of the housing for controlling the device. A controller is mounted on the lower part of the housing. A display screen for displaying data is mounted on the upper front side of the housing. The laser emitter is mounted on the upper right side inside the housing. A protective plate is connected to the right side of the laser emitter; the protective plate has a transparent center, allowing the laser to pass through. A rubber block for cushioning is adhesively attached to the upper right side wall of the housing near the laser emitter. The display screen, laser emitter, and level are all electrically connected to the controller. Protective components are provided inside the housing, including a push block, a moving frame, and a compression spring. The system includes a spring, support rod, push rod, connecting frame, hinge rod, wiping strip, and soft cover. A push block is slidably connected to the upper left side of the inner shell. A movable frame is slidably connected to the upper left side of the inner shell, and the movable frame is connected to the push block. A compression spring connects the push block to the inside of the outer shell. A support rod is fixed in the middle of the upper part of the inner shell, and a push rod is rotatably connected to the support rod. The lower side of the push rod is slidably and rotatably connected to the right side of the movable frame. A connecting frame is slidably connected to the laser emitter, and the connecting frame is slidably and rotatably connected to the upper side of the push rod. Hinges are symmetrically and rotatably connected to both sides of the right side of the connecting frame. Wiping strips are symmetrically slidably connected to the protective plate. Soft covers are connected between the two wiping strips and the inner wall of the laser emitter, and the soft covers cover the protective plate. The upper and lower ends of the two wiping strips are rotatably connected to adjacent hinge rods.

[0007] As a further preferred option, moving the connecting frame to the left can pull the hinge rod to rotate, and the hinge rod can pull the two wiping strips to move outward to wipe the surface of the protective plate.

[0008] As a further preferred embodiment, it also includes connecting columns, support blocks, wedge blocks, moving rods, sleeves, tension springs, elastic sleeves, return springs, marker pens, and silicone layers. Connecting columns are symmetrically connected to the upper part of the outer shell, and support blocks are symmetrically fixed to the upper left side of the inner part of the outer shell. Wedge blocks are symmetrically connected to the moving frame. Moving rods are slidably connected to both support blocks. When the wedge blocks move to the right, they will contact the moving rods. Sleeves are slidably connected inside both connecting columns. Both sleeves are connected to the adjacent moving rods. Tension springs are connected between the inside of both sleeves and the adjacent support blocks. Both sleeves have conical grooves. Elastic sleeves are slidably connected inside the conical grooves. Return springs are connected between the inside of both elastic sleeves and the corresponding sleeves. Marker pens are snapped into the elastic sleeves. Silicone layers are glued to the outside of both sleeves.

[0009] As a further preferred option, the elastic sleeve clamps the marker pen due to the compression of the conical groove, and the silicone layer has a groove in the middle, through which the marker pen can be extended and removed.

[0010] As a further preferred embodiment, it also includes a support base, a locking rod, a guide block, a spring, and a baffle. A support base is fixed on the left side of the wedge block on the movable frame. A locking rod is rotatably connected to each support base. There is damping between the locking rod and the support base. A limit groove is symmetrically opened on the left side of the movable frame. A guide block is fixed in the limit groove. A spring is connected to the lower left side of each of the two guide blocks. Both locking rods slide in engagement with the adjacent limit grooves. A baffle for blocking the locking rod is connected to the upper left side of each of the two limit grooves.

[0011] As a further preferred option, the moving frame moves to the right with the guide block and the spring, and the lever will actuate the spring, causing the lever to move past the spring and along the edge of the guide block.

[0012] As a further preferred embodiment, it also includes a dial, a rotating disk, a gravity rod, and an indicator rod. A rotating disk is rotatably connected to each of the two connecting columns, and a dial is fixed to the outside of each of the two connecting columns. A gravity rod is connected to each of the rotating disks, and an indicator rod is fixed to the upper side of each gravity rod. The outer shell is tilted, and the gravity rod will remain vertical under the action of gravity. The indicator rod can indicate the scale on the dial.

[0013] As a further preferred embodiment, it also includes a buffer ring and a buffer spring, with the buffer ring slidably connected to the laser emitter and a buffer spring connecting the buffer ring to the interior of the laser emitter.

[0014] The present invention has the following advantages: 1. A protective plate is set to protect the laser emitter, and a soft cover covers the protective plate, which can prevent dust and scratches from sticking to the surface of the protective plate. When in use, pressing the push block can make the wiping strip fold outward with the soft cover. The wiping strip can also wipe and clean the surface of the protective plate, ensuring accurate laser emission. The operation is simple and fast. 2. Set up a marker pen. When performing laser ranging, press the push block to push out the marker pen, which will then mark the wall, making it easier for staff to record the precise location of two target points and avoid forgetting them. 3. The locking lever and guide block work together to lock the movable frame after the soft cover is pulled open, keeping the soft cover in the open state, so that there is no need to repeatedly open and close it during use; 4. The gravity bar and scale are designed so that when measuring the distance between two points at an angle, the outer casing is tilted while the gravity bar remains vertical. The tilt angle can be determined by pointing the indicator rod to the scale on the scale, which is convenient for recording. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a partial cross-sectional view of the present invention.

[0017] Figure 3This is a three-dimensional structural diagram of the moving frame, push rod, connecting frame, and other components of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the connecting frame, flexible cover, and protective plate of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the buffer ring, buffer spring, and protective plate components of the present invention.

[0020] Figure 6 This is a three-dimensional structural diagram of the connecting frame, hinge rod, and protective plate of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the soft cover, wiping strip, and hinge rod components of the present invention.

[0022] Figure 8 This is a three-dimensional structural diagram of the connecting column, support block, and pushing block of the present invention.

[0023] Figure 9 This is a three-dimensional structural diagram of the wedge block, moving rod, and sleeve components of the present invention.

[0024] Figure 10 This is a schematic diagram of the structure of the sleeve, marking pen, and silicone layer of the present invention.

[0025] Figure 11 This is a schematic diagram of the structure of the elastic sleeve, wedge block, and support block of the present invention.

[0026] Figure 12 This is a schematic diagram of the structure of the tension spring, elastic sleeve, and marking pen components of the present invention.

[0027] Figure 13 This is a schematic diagram of the structure of the sleeve, elastic sleeve, and marking pen components of the present invention.

[0028] Figure 14 This is a three-dimensional structural diagram of the support base, clamping rod, and movable frame of the present invention.

[0029] Figure 15 This is a structural schematic diagram of the support base, clamping rod, and guide block of the present invention.

[0030] Figure 16 This is a three-dimensional structural diagram of the scale, rotating disk, and gravity rod components of the present invention.

[0031] Figure 17 For the present invention Figure 16 Enlarged view of point A in the middle.

[0032] Wherein: 1-Outer shell, 101-Level indicator, 102-Button assembly, 103-Laser emitter, 104-Protective plate, 105-Display screen, 106-Rubber block, 107-Controller, 201-Push block, 202-Moving frame, 203-Compression spring, 204-Support rod, 205-Push rod, 206-Connecting frame, 207-Hinge rod, 208-Wiping strip, 209-Soft cover, 301-Connecting column, 302-Support block, 303-Wedge block 304-Moving rod, 305-Sleeve, 306-Tension spring, 307-Conical groove, 308-Elastic sleeve, 309-Reset spring, 3010-Marker pen, 3011-Silicone layer, 401-Support base, 402-Clamping rod, 403-Limiting groove, 404-Guide block, 405-Spring, 406-Baffle, 501-Digital dial, 502-Rotating disk, 503-Gravity rod, 504-Indicator rod, 601-Buffer ring, 602-Buffer spring. Detailed Implementation

[0033] The present invention will be further described below with reference to specific embodiments. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0034] Example 1: A handheld laser rangefinder, such as Figures 1-7As shown, the device includes a housing 1, a level 101, a button assembly 102, a laser emitter 103, a protective plate 104, a display screen 105, a rubber block 106, and protective components. The level 101 is mounted on the top of the housing 1. The button assembly 102, consisting of multiple buttons, is mounted on the lower right side of the housing 1 for controlling the device. A controller 107 is mounted on the lower part of the housing 1. A display screen 105 for displaying data is mounted on the upper front side of the housing 1. The laser emitter 103 is mounted on the upper right side inside the housing 1, and the protective plate 104 is connected to the right side of the laser emitter 103. 04. The protective plate 104 has a transparent center, allowing the laser to be emitted through it. A rubber block 106 for cushioning is glued to the upper right side wall of the outer casing 1 near the laser emitter 103. The display screen 105, laser emitter 103, and level 101 are all electrically connected to the controller 107. The outer casing 1 contains a protective assembly, including a push block 201, a moving frame 202, a compression spring 203, a support rod 204, a push rod 205, a connecting frame 206, a hinge rod 207, a wiping strip 208, and a soft cover 209. The outer casing 1 contains... A push block 201 is slidably connected to the upper left side of the outer casing 1. A movable frame 202 is slidably connected to the upper left side of the outer casing 1. The movable frame 202 is connected to the push block 201. A compression spring 203 connects the push block 201 to the inside of the outer casing 1. A support rod 204 is fixed in the middle of the upper part of the outer casing 1. A push rod 205 is rotatably connected to the support rod 204. The lower side of the push rod 205 is slidably and rotatably connected to the right side of the movable frame 202. A connecting frame 206 is slidably connected to the laser emitter 103. The connecting frame 206 is slidably and rotatably connected to the upper side of the push rod 205. The connecting frame 206 has hinge rods 207 symmetrically rotated on both the front and rear sides of the right side. Wiping strips 208 are symmetrically slidably connected to the protective plate 104. Soft covers 209 are connected between the two wiping strips 208 and the inner wall of the laser emitter 103. The soft covers 209 cover the protective plate 104. The upper and lower ends of the two wiping strips 208 are rotatably connected to the adjacent hinge rods 207. When the connecting frame 206 moves to the left, it can pull the hinge rods 207 to rotate. The hinge rods 207 pull the two wiping strips 208 to move outward to wipe the surface of the protective plate 104.

[0035] When using this device to measure the distance between two target points, the operator holds the outer casing 1, aligns the laser emitter 103 with the target wall, and checks the level 101 to determine if the outer casing 1 is tilted, ensuring the laser is emitted in a straight line. Then, the operator presses the corresponding button on the button group 102 to turn on the device. Next, the operator presses the push block 201, causing it to push the moving frame 202 to move to the right, compressing the spring 203. The movement of the moving frame 202 to the right pushes the push rod 205 to rotate, which in turn pulls the connecting frame 206 to the left, thus connecting... The connecting frame 206 pulls the hinge rod 207 to rotate and move outward. The hinge rod 207 then pulls the two wiping strips 208 to move away from each other while still attached to the protective plate 104. The wiping strips 208 wipe the surface of the protective plate 104. The movement of the wiping strips 208 also pushes the two flexible covers 209 to move and fold outward, so that the flexible covers 209 no longer block the protective plate 104. The operator activates the laser emitter 103, and the laser on the laser emitter 103 can then be emitted through the protective plate 104 onto the wall. After the laser is reflected by the wall, it is received by this device. The laser emitter 103 will then... The controller 107 records the round-trip time of the laser and calculates the distance between the device and the wall. The data is transmitted to the display screen 105 via the controller 107 and displayed for the operator to view. After the distance measurement is completed, the operator releases the push block 201. The push block 201 moves to the left under the reset action of the compression spring 203, which in turn moves the moving frame 202 to the left. The moving frame 202 pulls the push rod 205 to rotate, causing the push rod 205 to move the connecting frame 206 to the right. The connecting frame 206 then pushes the hinge rod 20... 7. Reverse rotation causes the hinge rod 207 to push the two wiping strips 208 closer together and reset. The wiping strips 208 pull the two soft covers 209 inward to unfold, so that the soft covers 209 block the protective plate 104, which can prevent the surface of the protective plate 104 from being scratched or dusty. The protective plate 104 can protect the laser emitter head 103, prevent the laser emitter 103 from being damaged, and improve the service life of the device. When using this device, the surface of the protective plate 104 can be cleaned by wiping strips 208 to ensure that the laser beam can be clearly emitted and received, and improve the accuracy of data.

[0036] Example 2: Based on Example 1, such as Figures 8-13As shown, it also includes connecting posts 301, support blocks 302, wedge blocks 303, moving rods 304, sleeves 305, tension springs 306, elastic sleeves 308, return springs 309, markers 3010, and silicone layers 3011. Connecting posts 301 are symmetrically connected to the upper part of the outer shell 1. Support blocks 302 are symmetrically fixed to the upper left side of the inner part of the outer shell 1. Wedge blocks 303 are symmetrically connected to the moving frame 202. Moving rods 304 are slidably connected to both support blocks 302. Moving wedge blocks 303 to the right will push the two moving rods 304 to move outward. Sleeves 305 are slidably connected inside both connecting posts 301. Both sleeves 305 are connected to adjacent moving rods 304. Both sleeves 305 are connected to adjacent support blocks 302 with tension springs 306. Both sleeves 305 have conical grooves 307. Elastic sleeves 308 are slidably connected in the conical grooves 307. Both elastic sleeves 308 are connected to the corresponding sleeves 305 with return springs 309. Marking pens 3010 are snapped into the elastic sleeves 308. The elastic sleeves 308 clamp the marking pens 3010 due to the compression of the conical grooves 307. Both sleeves 305 have silicone layers 3011 glued to their outer sides. The silicone layers 3011 have a groove in the middle, through which the marking pens 3010 can be extended and removed.

[0037] When measuring the distance between two targets, hold the device by hand, bring the outer casing 1 close to the adjacent wall, align the laser emitter 103 with the measurement point on the opposite side, and press the push block 201 to move the moving frame 202 to the right. The moving frame 202 moves the wedge block 303 to the right, which in turn pushes the moving rod 304 to move outward. The moving rod 304 then pushes the sleeve 305 to move outward, stretching the tension spring 306. The sleeve 305 then moves the elastic sleeve 308 and the marker pen 3010 outward. The marker pen 3010 extends through the slot on the silicone layer 3011, thus opening the silicone layer 3011. The marker pen 3010 then contacts the side wall and marks a mark on the side wall. After the device has measured the distance, the operator releases the push block 201. The push block 201 moves the moving frame 202 to the left, which in turn moves the wedge block 303 to the left and resets it. The wedge block 303 no longer blocks the moving rod 304, and the sleeve 305, under the reset action of the tension spring 306, moves the moving rod 304 and the elastic... The sleeve 308 and the marker pen 3010 move inward to reset, causing the marker pen 3010 to retract into the connecting post 301. This design allows the marker pen 3010 to automatically mark the wall, facilitating accurate location of target points by staff later. To replace the marker pen 3010, repeat the above steps to push the push block 201, pushing the marker pen 3010 out. Then, the staff can pull the marker pen 3010 out of the slot. As the marker pen 3010 is pulled out, it will move the elastic sleeve 308 outward, causing the return spring 3010 to retract. 9. Compression: As the shape of the conical groove 307 expands outwards, the elastic sleeve 308 moves outwards and is no longer subjected to compressive force due to its own elasticity. Thus, the marker pen 3010 is released and can be easily removed. The elastic sleeve 308 will then move inwards to reset under the reset action of the return spring 309. When installing the marker pen 3010, insert the marker pen 3010 into the elastic sleeve 308. The elastic sleeve 308 will deform due to the compression of the conical groove 307, clamping the marker pen 3010, thus completing the assembly.

[0038] like Figures 14-15As shown, it also includes a support base 401, a locking rod 402, a guide block 404, a spring 405, and a baffle 406. Support bases 401 are fixed on the movable frame 202 at positions to the left of the wedge block 303. Locking rods 402 are rotatably connected to each support base 401. There is damping between the locking rods 402 and the support bases 401. Limiting grooves 403 are symmetrically opened on the left side of the movable frame 202, and guide blocks 404 are fixed within the limiting grooves 403. The two guide blocks... A spring 405 is connected to the lower left side of block 404. Both locking rods 402 slide in cooperation with the adjacent limiting grooves 403. The moving frame 202 moves to the right with the guide block 404 and the spring 405. The locking rod 402 will push the spring 405, so that the locking rod 402 moves past the spring 405 along the edge of the guide block 404 and is then locked by the guide block 404. A baffle 406 for blocking the locking rod 402 is connected to the upper left side of both limiting grooves 403.

[0039] During laser ranging, pressing the push block 201 moves the moving frame 202 to the right, causing the wiping strip 208 to move outward to wipe the protective plate 104, and causing the soft cover 209 to fold outward and open to facilitate laser emission. As the moving frame 202 moves to the right, it also moves the guide block 404, the baffle 406, and the spring 405 to the right. The locking rod 402 moves along the bottom edge of the limiting groove 403. When it contacts the spring 405, the spring 405 is squeezed upward and deformed, thus passing the locking rod 402. 02. After the locking lever 402 moves to its limit, the operator releases the push block 201. The push block 201 and the moving frame 202 will move slightly to the left to reset. Due to the obstruction of the spring 405, the locking lever 402 will be pushed to rotate upward along the edge of the guide block 404, and then approach the baffle 406 and be locked by the guide block 404. The locking lever 402 is locked on the concave surface formed by the guide block 404, and the push block 201 cannot continue to move to reset. The soft cover 209 will remain folded and retracted, preventing the protective plate 104 from... The device is covered, thus automatically fixing the movable frame 202 and the push block 201. This allows for convenient long-term use of the device without repeatedly pressing the push block 201. After use, pressing the push block 201 moves the movable frame 202 to the right, causing the locking rod 402 to contact the baffle 406. This increases the damping, increasing the friction between the locking rod 402 and the support base 401, allowing the locking rod 402 to move onto the baffle 406. The baffle 406 moves with the movable frame 202, ensuring the locking rod 402 is flush against the baffle 406. 06. Move to the upper edge of guide block 404 and move along the upper edge of guide block 404. The locking rod 402 is no longer locked on guide block 404. At this time, the staff releases push block 201 again, so that push block 201 and moving frame 202 move to the left to reset. Soft cover 209 will move inward and unfold, thus blocking protective plate 104. The movement of moving frame 202 to the left will cause locking rod 402 to move and reset to the initial position along the gap between limiting groove 403 and upper wall of guide block 404.

[0040] like Figures 16-17 As shown, it also includes a dial 501, a rotating disk 502, a gravity rod 503, and an indicator rod 504. The rotating disk 502 is rotatably connected to both connecting posts 301. The dial 501 is fixed to the outside of both connecting posts 301. The gravity rod 503 is connected to both rotating disks 502. The indicator rod 504 is fixed to the upper side of the gravity rod 503. When the outer shell 1 is tilted, the gravity rod 503 will remain vertical under the action of gravity, causing the rotating disk 502 to rotate. The indicator rod 504 is attached to the top surface of the dial 501 and can indicate the scale on the dial 501.

[0041] When using this device, if it is necessary to measure the distance between two targets at an angle in a room, the staff holds the device, tilts it upward, and aligns the laser emitter 103 with the target point. The gravity rod 503 will be kept vertical downward under the action of gravity. The rotating disk 502 rotates along the connecting column 301, while the scale 501 remains stationary. The indicator rod 504 on the gravity rod 503 will point to the scale on the scale 501. By checking the scale, the angle of inclination of the outer shell 1 can be determined, which is convenient for the staff to record data.

[0042] like Figure 1 , Figure 4 and Figure 5 As shown, it also includes a buffer ring 601 and a buffer spring 602. The buffer ring 601 is slidably connected to the laser emitter 103, and the buffer spring 602 is connected between the buffer ring 601 and the inside of the laser emitter 103.

[0043] The buffer ring 601 is located on the outside of the laser emitter 103. If the device falls to the ground, the buffer ring 601 and the buffer spring 602 work together to cushion the impact. The rubber block 106 on the outer shell 1 can also be used for cushioning, preventing the laser emitter 103 from being damaged by direct contact with the ground and improving the service life of the laser emitter 103.

[0044] The technical principles of the embodiments of the present invention have been described above with reference to specific examples. These descriptions are merely for explaining the principles of the embodiments of the present invention and should not be construed as limiting the scope of protection of the embodiments of the present invention in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the embodiments of the present invention.

Claims

1. A handheld laser rangefinder, comprising a housing (1), a level (101), a button assembly (102), a laser emitter (103), and a display screen (105), wherein the level (101) is mounted on the top of the housing (1), the button assembly (102) is mounted on the lower right side of the housing (1), a controller (107) is mounted on the lower part of the housing (1), the display screen (105) is mounted on the upper front side of the housing (1), and the laser emitter (103) is mounted on the upper right side inside the housing (1), characterized in that: It also includes a protective plate (104), a rubber block (106), and protective components. The protective plate (104) is connected to the right side of the laser emitter (103). The middle of the protective plate (104) is made of transparent material, and the laser will be emitted through the protective plate (104). A rubber block (106) is glued to the upper right side wall of the outer casing (1) near the laser emitter (103). The display screen (105), the laser emitter (103), and the level (101) are all connected to the controller (107). The outer shell (1) is connected to the outer shell (1), and the protective components include a push block (201), a movable frame (202), a compression spring (203), a support rod (204), a push rod (205), a connecting frame (206), a hinge rod (207), a wiping strip (208), and a soft cover (209). The push block (201) is slidably connected to the upper left side of the outer shell (1), and the movable frame (202) is slidably connected to the upper left side of the outer shell (1). 02) Connected to the push block (201), the push block (201) is connected to the inside of the outer shell (1) by a compression spring (203), a support rod (204) is fixed in the middle of the upper part of the outer shell (1), a push rod (205) is rotatably connected to the support rod (204), the lower side of the push rod (205) is slidably and rotatably connected to the right side of the moving frame (202), a connecting frame (206) is slidably connected to the laser emitter (103), and the connecting frame (206) is connected to the push rod (205) The upper side is connected in a sliding and rotating manner. The right side of the connecting frame (206) is symmetrically connected to the hinge rod (207) in a rotating manner. The protective plate (104) is symmetrically connected to the wiping strip (208). The two wiping strips (208) are connected to the inner wall of the laser emitter (103) with a soft cover (209). The soft cover (209) covers the protective plate (104). The upper and lower ends of the two wiping strips (208) are rotatably connected to the adjacent hinge rod (207).

2. The handheld laser rangefinder as described in claim 1, characterized in that: The connecting frame (206) can move to the left to pull the hinge rod (207) to rotate, and the hinge rod (207) can pull the two wiping strips (208) to move outward to wipe the surface of the protective plate (104).

3. The handheld laser rangefinder as described in claim 1, characterized in that: It also includes a connecting column (301), a support block (302), a wedge block (303), a moving rod (304), a sleeve (305), a tension spring (306), an elastic sleeve (308), a return spring (309), a marker pen (3010), and a silicone layer (3011). The connecting column (301) is symmetrically connected to the upper part of the outer shell (1). The support block (302) is symmetrically fixed to the upper left side of the inner part of the outer shell (1). The wedge block (303) is symmetrically connected to the moving frame (202). The moving rod (304) is slidably connected to both support blocks (302). When the wedge block (303) moves to the right, it will contact the moving rod (304). Both connecting columns (301) are slidably connected to sleeves (305), both sleeves (305) are connected to adjacent moving rods (304), both sleeves (305) are connected to adjacent support blocks (302) with tension springs (306), both sleeves (305) are opened with conical grooves (307), both conical grooves (307) are slidably connected to elastic sleeves (308), both elastic sleeves (308) are connected to the interior of the corresponding sleeves (305) with reset springs (309), both elastic sleeves (308) are snapped into the interior of the elastic sleeves (308), and both sleeves (305) are glued with silicone layers (3011) on the outside.

4. A handheld laser rangefinder as described in claim 3, characterized in that: The elastic sleeve (308) clamps the marker pen (3010) due to the compression of the conical groove (307). The silicone layer (3011) has a groove in the middle, through which the marker pen (3010) can be extended and removed.

5. A handheld laser rangefinder as described in claim 3, characterized in that: It also includes a support base (401), a locking rod (402), a guide block (404), a spring (405), and a baffle (406). The moving frame (202) is fixed with a support base (401) on the left side of the wedge block (303). The locking rod (402) is rotatably connected to the support base (401). There is damping between the locking rod (402) and the support base (401). The left side of the moving frame (202) has symmetrical limit grooves (403). The guide block (404) is fixed in the limit groove (403). The lower left side of the two guide blocks (404) is connected with a spring (405). The two locking rods (402) slide with the adjacent limit grooves (403). The upper left side of the two limit grooves (403) is connected with a baffle (406) for blocking the locking rod (402).

6. A handheld laser rangefinder as described in claim 5, characterized in that: The moving frame (202) moves to the right with the guide block (404) and the spring (405). The lever (402) will push the spring (405) so that the lever (402) moves past the spring (405) along the edge of the guide block (404).

7. A handheld laser rangefinder as described in claim 5, characterized in that: It also includes a dial (501), a rotating disk (502), a gravity rod (503) and an indicator rod (504). The rotating disk (502) is rotatably connected to both connecting columns (301). The dial (501) is fixed to the outside of both connecting columns (301). The gravity rod (503) is connected to both rotating disks (502). The indicator rod (504) is fixed to the upper side of the gravity rod (503). The outer shell (1) is tilted. The gravity rod (503) will remain vertical under the action of gravity. The indicator rod (504) can indicate the scale on the dial (501).

8. A handheld laser rangefinder as described in claim 1, characterized in that: It also includes a buffer ring (601) and a buffer spring (602). The buffer ring (601) is slidably connected to the laser emitter (103), and the buffer spring (602) is connected between the buffer ring (601) and the inside of the laser emitter (103).

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