A rangefinder lens with laser focus and lens assembly

Abstract

The present invention relates to the field of lens technology, and in particular, provides a laser focusing rangefinder lens and lens assembly. The laser focusing rangefinder lens comprises a lens tube, a standard lens is installed at the front end of the lens tube, the inner surface of the standard lens is located in the lens tube, the outer surface of the standard lens is exposed outside the front end of the lens tube, a focusing lens group is installed at the rear end of the lens tube, and the lenses on the focusing lens group and the lenses on the standard lens are in the same straight line; a third lens seat connected to the first lens seat and sleeved on the outer periphery of the second lens adjustment seat; the rear end of the lens tube is inserted into the focusing lens group, and a buffer mechanism is provided between the lens tube and the focusing lens group; the buffer mechanism is provided with a cleaning assembly, and the shaft ring reacts to the lens tube, which is transmitted from the lens tube to the standard lens to reduce the impact force on the standard lens, so that the standard lens is protected and prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of lenses, and in particular to a laser focusing and ranging lens and a lens assembly. Background Art

[0002] Focusing mainly involves adjusting the distance between the shooting lens and the image sensing component. When the lens is focused, the lens barrel is rotated, and the distance between the lens and the image or the lens group is controlled by the extension and contraction of the lens barrel. Therefore, in most cases, the lens barrels are sleeved together and driven by gears and other structures. The lens in the automation equipment is driven by a micro motor to drive the gears to rotate, and the gears drive the lens barrel to adjust back and forth. For example, the lens used in a sweeping robot cannot be manually operated during distance measurement and adjustment, and is usually equipped with a distance sensor for automatic control.

[0003] A Chinese patent with application number 201920218521.2 discloses a lens assembly with laser focus and ranging that can be finely adjusted, including a base, a sleeve installed on the base, the sleeve is equipped with a lens barrel, two mounting holes are provided on the base, and laser sensors are provided in the mounting holes. The laser sensor can detect the distance between the photographed object and the photographing equipment, and the number of rotations and the extension range of the lens barrel body can be quickly determined according to the size of the distance.

[0004] A Chinese patent with application number 202410605445.6 discloses an integrated lens installed on a sweeping robot, including a standard lens, a color filter is provided in the standard lens, an image processing module back cover is provided at the rear end of the standard lens, and an image processing PCB board is provided in the image processing module back cover. By rotating a rotating ring, two latch rods that were previously in an uninstalled state can be connected to the sweeping robot body and the front cover plate under the action of two springs, so that the standard lens, the front cover plate and the sweeping robot body can be easily installed.

[0005] In summary, the patent improves the performance by installing a laser sensor on the lens, and by setting a disassembly structure, the lens can be well applied to the device, which is convenient for disassembly and combination with the device. However, when it is applied to the device and used for shooting, firstly, a protective function cannot be set on the outside of the device to protect the lens; secondly, when the lens is applied to automated equipment, once it collides with a third-party object, it will cause damage to the lens; thirdly, dust is easily formed on the inner surface of the outermost lens, which is not easy to clean without disassembly. Summary of the invention

[0006] In order to solve the above problem and protect the lens when the device is used, the present invention provides the following technical solutions:

[0007] A laser focusing rangefinder lens, comprising a lens tube, a standard lens is installed at the front end of the lens tube, the inner surface of the standard lens is located in the lens tube, the outer surface of the standard lens is exposed outside the front end of the lens tube, a focusing lens group is installed at the rear end of the lens tube, and the lenses on the focusing lens group and the lenses on the standard lens are in the same straight line; both sides of the standard lens are provided with laser sensors; the focusing lens group comprises a first lens seat sleeved on the rear end of the lens tube, a second lens adjustment seat sleeved on the rear end of the first lens seat, and a third lens adjustment seat connected to the first lens seat and sleeved on the outer periphery of the second lens adjustment seat The lens seat; the rear end of the lens tube is inserted into the focusing lens group, and a buffer mechanism is provided between the lens tube and the focusing lens group; the buffer mechanism is provided with a cleaning assembly; the buffer mechanism includes a buffer seat installed between the lens tube and the first lens seat, and the cleaning assembly includes an air cavity and a cleaning tube formed in the buffer seat, the air inlet end of the cleaning tube is connected to the buffer seat and communicates with the air cavity, the air outlet end of the cleaning tube is connected to the lens tube, and the air outlet direction of the cleaning tube faces the inner surface of the standard lens; a plurality of discharge holes are provided at the bottom of the front end of the lens tube, and the discharge holes are close to the standard lens.

[0008] Furthermore, the first lens mount and the second lens mount are mounted with lens units that are in the same straight line as the standard lens, and the second lens adjustment mount can be on the first lens mount to adjust the distance relative to the first lens mount and the third lens mount.

[0009] Furthermore, a reducing seat is provided at the front end of the first lens seat, and the diameter of the reducing seat is larger than the diameter of the first lens seat, so that a reducing cavity surrounding the periphery of the rear end of the lens tube is formed in the reducing seat, and the buffer seat is located in the reducing cavity, and an axial ring is provided on the outer circular surface of the rear end of the lens tube, and the rear end of the axial ring is pressed against the front end of the buffer seat, and the rear end of the buffer seat is pressed against the rear end of the reducing cavity, and the buffer seat is a corrugated air bag.

[0010] Furthermore, an oblique hole is provided on the lens tube and the pipeline, the oblique hole is close to the standard lens, the oblique hole is inclined toward the direction of the standard lens, the air outlet of the cleaning tube is located in the oblique hole, a cutout is provided on the air outlet of the cleaning tube, the cutout faces the front inclined surface of the oblique hole, the cleaning tube is bent backwards, and the cleaning tube is a flexible tube;

[0011] When the mirror tube moves backward with the inclined hole, the cleaning tube is driven by the inclined hole to continue to bend backward, and the incision is deflected from the inclined hole into the mirror tube.

[0012] Furthermore, a stepped portion is provided at the rear end of the mirror tube, the rear end of the mirror tube is inserted into the first lens seat, the first lens seat is filled with a spring, the front end of the spring is sleeved on the stepped portion, and the rear end is pressed against the rear end of the inner cavity of the first lens seat.

[0013] The present invention also provides a lens assembly, which is suitable for the laser focusing and ranging lens as described above, comprising a front connecting cover and a rear connecting cover installed at the rear end of the front connecting cover, a front through hole communicating front and back is opened in the middle of the front connecting cover, a rear through hole communicating front and back is opened in the middle of the rear connecting cover, the mirror tube is located in the front connecting cover and the rear connecting cover, and the front and rear ends of the mirror tube are passed through the front through hole and the rear through hole; a shielding cover is provided at the rear end of the front connecting cover, the front end of the shaft ring is limited to the rear side of the shielding cover, and the rear end of the shaft ring is connected to the buffer seat.

[0014] Furthermore, the reducer seat at the front end of the first lens seat is fixed in the rear connecting cover, and the rear end of the cleaning tube passes through the rear connecting cover.

[0015] Furthermore, the front end of the lens tube is exposed outside the front of the front connecting cover, and the standard lens follows the front end of the lens tube and is exposed outside the front of the front connecting cover.

[0016] Furthermore, the front face of the front connecting cover is a curved surface.

[0017] Furthermore, mounting holes are provided on both sides of the front connection cover, and the two laser sensors are respectively mounted in the two mounting holes.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Leave the standard lens outside to increase the camera range. The standard lens is the first lens unit. Once it is hit by external force, the impact force causes the standard lens to move backwards, and the standard lens pushes the lens tube backwards, and the lens tube pushes the shaft ring backwards, and the shaft ring pushes the buffer seat to be compressed and shortened. The elastic force provided by the compression of the buffer seat reacts to the shaft ring, and the shaft ring reacts to the lens tube, and is transmitted to the standard lens by the lens tube to reduce the impact force on the standard lens, so that the standard lens is protected and prevented from being damaged.

[0020] 2. The function of compressing the buffer seat by impacting the outside of the standard lens is also applied to the cleaning component. Since the cleaning component is the air cavity in the buffer seat and the cleaning tube connected to the buffer seat, when dust is attached to the inner surface of the standard lens, the user can press the outside of the standard lens to move the standard lens backward, and the standard lens pushes the lens tube backward, and the lens tube pushes the shaft ring backward, and the shaft ring pushes the buffer seat to compress and shorten. When the buffer seat is compressed, the volume of the air cavity becomes smaller, and the gas in the air cavity is discharged outward through the cleaning tube. Since the air outlet end of the cleaning tube is close to the back of the standard lens, the discharged gas blows to the back of the standard lens, causing the dust attached to the back to fall downward into the discharge hole, and finally discharged outward from the discharge hole. The operating principle of this cleaning component is consistent with the operating principle of the buffer mechanism. The setting of the two functions and the operation do not require the addition of too many additional components, and it is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a laser focusing and ranging lens provided in an embodiment of the present invention;

[0022] Figure 2 A laser focusing ranging lens provided in an embodiment of the present invention comprises Figure 1 The schematic diagram after the section is drawn;

[0023] Figure 3 A schematic diagram of a lens assembly provided in an embodiment of the present invention being applied to a lens;

[0024] Figure 4 A lens assembly provided in an embodiment of the present invention is applied to a lens by Figure 3 A schematic diagram from another perspective;

[0025] Figure 5 A lens assembly provided in an embodiment of the present invention is applied to a lens by Figure 4 The schematic diagram after the section is drawn;

[0026] Figure 6 An exploded schematic diagram of a lens assembly provided in an embodiment of the present invention being applied to a lens.

[0027] In the figure: 1. lens tube; 2. standard lens; 3. focusing lens group; 4. first lens seat; 5. second lens adjustment seat; 6. third lens seat; 7. buffer seat; 8. air cavity; 9. cleaning tube; 10. laser sensor; 11. lens unit; 12. diameter reducing seat; 13. diameter reducing cavity; 14. shaft ring; 15. oblique hole; 16. incision; 17. stepped portion; 18. front connecting cover; 19. rear connecting cover; 20. front through hole; 21. rear through hole; 22. mounting hole; 23. discharge hole; 24. spring; 25. shielding cover. DETAILED DESCRIPTION

[0028] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0029] In one embodiment, Figure 1-Figure 6 As shown: This embodiment provides a laser focusing distance measuring lens including a lens tube 1, a standard lens 2 is installed at the front end of the lens tube 1, the inner surface of the standard lens 2 is located inside the lens tube 1, and the outer surface of the standard lens 2 is exposed outside the front end of the lens tube 1, and a focusing lens group 3 is installed at the rear end of the lens tube 1, and the lenses on the focusing lens group 3 and the lenses on the standard lens 2 are in the same straight line;

[0030] The standard lens 2 is provided with laser sensors 10 on both sides; the laser sensors 10 can be purchased directly from the market. The laser sensors 10 use laser technology to measure the distance and feed back the signal to the lens device. The electronic control system in the lens device automatically controls the lens unit in the focusing lens group 3 to automatically adjust the focus. This technology is disclosed in the prior art (in the Chinese patent of 201920218521.2), and the present invention will not repeat it.

[0031] The focusing lens group 3 includes a first lens seat 4 mounted on the rear end of the lens tube 1, a second lens adjustment seat 5 mounted on the rear end of the first lens seat 4, and a third lens seat 6 connected to the first lens seat 4 and mounted on the outer periphery of the second lens adjustment seat 5; the first lens seat 4 and the second lens adjustment seat 5 are equipped with a lens unit 11 that is in the same straight line as the standard lens 2, and the second lens adjustment seat 5 can be on the first lens seat 4, The distance is adjusted relative to the first lens seat 4 and the third lens seat 6.

[0032] In addition, a reducing seat 12 is provided at the front end of the first lens seat 4, and the diameter of the reducing seat 12 is larger than the diameter of the first lens seat 4, so that a reducing cavity 13 surrounding the outer periphery of the rear end of the lens tube 1 is formed in the reducing seat 12, and the buffer seat 7 is located in the reducing cavity 13. A collar 14 is provided on the outer circumferential surface of the rear end of the lens tube 1, and the rear end of the collar 14 is pressed against the front end of the buffer seat 7, and the rear end of the buffer seat 7 is pressed against the rear end of the reducing cavity 13. The buffer seat 7 is a corrugated air bag.

[0033] The present invention inserts the rear end of the mirror tube 1 into the focusing lens group 3, and a buffer mechanism is provided between the mirror tube 1 and the focusing lens group 3; the buffer mechanism is provided with a cleaning assembly; specifically, the rear end of the mirror tube 1 is inserted into the first lens seat 4 of the first section, the buffer mechanism includes a buffer seat 7 installed between the mirror tube 1 and the first lens seat 4, the cleaning assembly includes an air cavity 8 and a cleaning tube 9 formed in the buffer seat 7, the air inlet end of the cleaning tube 9 is connected to the buffer seat 7 and communicates with the air cavity 8, the air outlet end of the cleaning tube 9 is connected to the mirror tube 1, and the air outlet direction of the cleaning tube 9 faces the inner surface of the standard lens 2; a plurality of discharge holes 23 are provided at the bottom of the front end of the mirror tube 1, and the discharge holes 23 are close to the standard lens 2. That is, the present invention has a buffer and cleaning function for the standard lens 2. The main body is embodied in the following usage principle: when the lens is installed in a third-party device for use (such as when the lens with application number 202410605445.6 is installed in a sweeping robot for use), the standard lens 2 is exposed outside to increase the camera range. The standard lens 2 is the first lens unit 11. Once it is hit by external force, the impact force causes the standard lens 2 to move backward (toward the device), and the standard lens 2 pushes the mirror tube 1 to move backward, and the mirror tube 1 pushes the shaft ring 14 to move backward, and the shaft ring 14 pushes the buffer seat 7 to be compressed and shortened. The elastic force provided by the compression of the buffer seat 7 reacts to the shaft ring 14, and the shaft ring 14 reacts to the mirror tube 1, and is transmitted from the mirror tube 1 to the standard lens 2 to reduce the impact force on the standard lens 2, so that the standard lens 2 is protected and prevented from being damaged.

[0034] In addition, the function of compressing the buffer seat 7 by impacting the outside of the standard lens 2 is also applied to the cleaning component. Since the cleaning component is the air cavity 8 in the buffer seat 7 and the cleaning tube 9 connected to the buffer seat 7, when dust is attached to the inner surface of the standard lens 2, the user can press the outside of the standard lens 2 to move the standard lens 2 backward, and the standard lens 2 pushes the lens tube 1 backward, and the lens tube 1 pushes the shaft ring 14 backward, and the shaft ring 14 pushes the buffer seat 7 to be compressed and shortened. When the buffer seat 7 is compressed, the volume of the air cavity 8 becomes smaller, and the gas in the air cavity 8 is discharged outward through the cleaning tube 9. Since the air outlet end of the cleaning tube 9 is close to the back (inner surface) of the standard lens 2, the discharged gas blows to the back of the standard lens 2, so that the dust attached to the back falls downward into the discharge hole 23, and is finally discharged outward from the discharge hole 23. The operating principle of this cleaning component is consistent with the operating principle of the buffer mechanism. The setting of the two functions and the operation do not require additional excessive other components, and the practicality is strong.

[0035] like Figure 2As shown, an inclined hole 15 is provided on the mirror tube 1 and the pipeline, the inclined hole 15 is close to the standard lens 2, and the inclined hole 15 is inclined in the direction of the standard lens 2. The air outlet of the cleaning tube 9 is located in the inclined hole 15, and a cutout 16 is provided on the air outlet of the cleaning tube 9, the cutout 16 faces the front inclined surface of the inclined hole 15, and the cleaning tube 9 bends backward. The cleaning tube 9 is a flexible tube; when the mirror tube 1 is pushed backward with the inclined hole 15, the inclined hole 15 will bend backward with the cleaning tube 9, and when the cleaning tube 9 bends backward, one end of the cutout 16 turns from the inclined hole 15 into the mirror tube 1, and at the same time, the cutout 16 is just aligned with the inner surface of the standard lens 2, and at the same time, the rear end of the mirror tube 1 just squeezes the buffer seat 7 to compress and shorten it, and exhausts forward through the cleaning tube 9, and blows the ejected gas to the inner surface of the standard lens 2, so that the dust on the inner surface falls downward. When the pressure on the front of the standard lens 2 disappears, the buffer seat 7 returns to its original state and pushes the rear end of the lens tube 1 to move the lens tube 1 forward and reset, bringing the cutout 16 forward and forcing the end of the cleaning tube 9 with the cutout 16 to turn into the cutout 16 for storage. At this time, either the impact condition disappears or the cleaning work is completed. The cutout 16 is automatically stored in the inclined hole 15 to prevent each lens unit 11 from being blocked when shooting.

[0036] like Figure 2 As shown, the rear end of the mirror tube 1 is provided with a stepped portion 17, the rear end of the mirror tube 1 is inserted into the first lens seat 4, the first lens seat 4 is filled with a spring 24, the front end of the spring 24 is sleeved on the stepped portion 17, and the rear end is pressed against the rear end of the inner cavity of the first lens seat 4. The front end of the spring 24 is positioned on the stepped portion 17, and when the rear end of the mirror tube 1 squeezes the spring 24, the spring 24 is prevented from being deflected.

[0037] like Figures 3 to 6 As shown, the present invention also provides a lens assembly, which is suitable for the above-mentioned laser focusing and ranging lens, comprising a front connecting cover 18 and a rear connecting cover 19 installed at the rear end of the front connecting cover 18, a front through hole 20 communicating with each other in the middle of the front connecting cover 18, a rear through hole 21 communicating with each other in the middle of the rear connecting cover 19, a lens tube 1 is located in the front connecting cover 18 and the rear connecting cover 19, and the front and rear ends of the lens tube 1 are passed through the front through hole 20 and the rear through hole 21; when the lens is actually used, it is fixed to the service equipment through the front connecting cover 18, the rear connecting cover 19 is fixed to the rear end of the front connecting cover 18 to be fixed together with the reducer 12 at the front end of the first lens seat 4, and finally the rear connecting cover 19 is fixed to the equipment, and the assembled lens assembly is fixed to the equipment through the rear connecting cover 19 and the front connecting cover 18. The lens tube 1 slides in the through holes (front through hole 20 and rear through hole 21) of the front connecting cover 18 and the rear connecting cover 19. The front end of the lens tube 1 is exposed outside the front of the front connecting cover 18 to increase the shooting range.

[0038] The rear end of the front connecting cover 18 is provided with a shielding cover 25, the front end of the collar 14 is limited to the rear side of the shielding cover 25, and the rear end of the collar 14 is connected to the buffer seat 7. Since the collar 14 is a structure on the mirror tube 1, the mirror tube 1 can be prevented from falling forward.

[0039] In another embodiment, the front of the front connection cover 18 is an arc surface. When the lens is assembled on the sweeping robot through the front connection cover 18, its outer surface coincides with the contour surface of the sweeping robot on the same arc surface, and the internal components are placed inside the robot. Of course, the front connection cover 18 can also be other shapes. When assembled on other equipment for use, the outer surface is consistent with the outer contour of the equipment, saving space.

[0040] Furthermore, mounting holes 22 are formed on both sides of the front connection cover 18 , and the two laser sensors 10 are respectively mounted in the two mounting holes 22 .

[0041] It is worth noting that the present invention does not improve the adjustment principle of the focusing lens group 3. For example, the power for adjusting the direction of the second lens adjustment seat 5 relative to the first lens seat 4 is a micro motor or a micro electric cylinder, etc. The specific distance adjustment principle can be referred to the camera lens or video camera, as well as the camera lens on the drone, etc.

[0042] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0043] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser focusing and ranging lens, characterized in that: The invention comprises a mirror tube (1), a standard lens (2) is installed at the front end of the mirror tube (1), the inner surface of the standard lens (2) is located inside the mirror tube (1), the outer surface of the standard lens (2) is exposed outside the front end of the mirror tube (1), and a focusing lens group (3) is installed at the rear end of the mirror tube (1), the lens on the focusing lens group (3) and the lens on the standard lens (2) are in the same straight line; laser sensors (10) are provided on both sides of the standard lens (2); the focusing lens group (3) comprises a first lens seat (4) sleeved on the rear end of the mirror tube (1), a second lens adjustment seat (5) sleeved on the rear end of the first lens seat (4), and a third lens seat (6) connected to the first lens seat (4) and sleeved on the outer periphery of the second lens adjustment seat (5); the The rear end of the lens tube (1) is inserted into the focusing lens group (3), and a buffer mechanism is provided between the lens tube (1) and the focusing lens group (3); the buffer mechanism is provided with a cleaning assembly; the buffer mechanism comprises a buffer seat (7) installed between the lens tube (1) and the first lens seat (4), the cleaning assembly comprises an air cavity (8) and a cleaning tube (9) formed in the buffer seat (7), the air inlet end of the cleaning tube (9) is connected to the buffer seat (7) and communicates with the air cavity (8), the air outlet end of the cleaning tube (9) is connected to the lens tube (1), and the air outlet direction of the cleaning tube (9) faces the inner surface of the standard lens (2); a plurality of discharge holes (23) are provided at the bottom of the front end of the lens tube (1), and the discharge holes (23) are close to the standard lens (2); A diameter-changing seat (12) is provided at the front end of the first lens seat (4), the diameter of the diameter-changing seat (12) being larger than the diameter of the first lens seat (4), so that a diameter-changing cavity (13) surrounding the outer periphery of the rear end of the lens tube (1) is formed in the diameter-changing seat (12), the buffer seat (7) is located in the diameter-changing cavity (13), a shaft ring (14) is provided on the outer circumferential surface of the rear end of the lens tube (1), the rear end of the shaft ring (14) is pressed against the front end of the buffer seat (7), and the rear end of the buffer seat (7) is pressed against the rear end of the diameter-changing cavity (13), and the buffer seat (7) is a corrugated air bag; The mirror tube (1) and the pipeline are provided with an inclined hole (15), the inclined hole (15) being close to the standard lens (2), the inclined hole (15) being inclined in the direction of the standard lens (2), the air outlet of the cleaning tube (9) being located in the inclined hole (15), the air outlet of the cleaning tube (9) being provided with a cutout (16), the cutout (16) facing the front inclined surface of the inclined hole (15), the cleaning tube (9) being bent backwards, and the cleaning tube (9) being a flexible tube; when the mirror tube (1) moves backwards with the inclined hole (15), the cleaning tube (9) is driven by the inclined hole (15) to continue to bend backwards, and the cutout (16) is deflected from the inclined hole (15) into the mirror tube (1).

2. The laser focusing and ranging lens according to claim 1, characterized in that: The first lens seat (4) and the second lens adjustment seat (5) are mounted with a lens unit (11) which is in the same straight line as the standard lens (2); the second lens adjustment seat (5) is capable of adjusting the distance on the first lens seat (4) relative to the first lens seat (4) and the third lens seat (6).

3. The laser focusing and ranging lens according to claim 2, characterized in that: The rear end of the mirror tube (1) is provided with a stepped portion (17), the rear end of the mirror tube (1) is inserted into the first lens seat (4), the first lens seat (4) is filled with a spring (24), the front end of the spring (24) is sleeved on the stepped portion (17), and the rear end is pressed against the rear end of the inner cavity of the first lens seat (4).

4. A lens assembly, which is suitable for the laser focusing and ranging lens as claimed in claim 3, characterized in that: The invention comprises a front connecting cover (18) and a rear connecting cover (19) mounted at the rear end of the front connecting cover (18); a front through hole (20) communicating front and rear is opened in the middle of the front connecting cover (18); a rear through hole (21) communicating front and rear is opened in the middle of the rear connecting cover (19); the mirror tube (1) is located in the front connecting cover (18) and the rear connecting cover (19); the front and rear ends of the mirror tube (1) pass through the front through hole (20) and the rear through hole (21); the reducing seat (12) at the front end of the first lens seat (4) is fixed in the rear connecting cover (19); the rear end of the cleaning tube (9) passes through the rear connecting cover (19); a shielding cover (25) is provided at the rear end of the front connecting cover (18); the front end of the shaft ring (14) is limited to the rear side of the shielding cover (25), and the rear end of the shaft ring (14) is connected to the buffer seat (7).

5. The lens assembly according to claim 4, characterized in that: The front end of the mirror tube (1) is exposed outside the front connection cover (18), and the standard lens (2) follows the front end of the mirror tube (1) and is exposed outside the front connection cover (18).

6. The lens assembly according to claim 5, characterized in that: The front face of the front connection cover (18) is a curved surface.

7. The lens assembly according to claim 6, characterized in that: Mounting holes (22) are provided on both sides of the front connection cover (18), and the two laser sensors (10) are respectively mounted in the two mounting holes (22).

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