laser

Abstract

The present disclosure provides a laser comprising a laser body, a laser cover, an optical lens outer frame and a first sealing ring. The laser body comprises a lens exposed to the laser body. The laser cover at least partially covers the laser body. The laser cover has a first lens hole. The optical lens outer frame is in a cylindrical structure penetrating along an axial direction. A first end of the optical lens outer frame is connected to the laser body and circumferentially surrounds the lens, and a second end of the optical lens outer frame is connected to the first lens hole. The first sealing ring is arranged between an end face of the first end of the optical lens outer frame and the laser body. The present disclosure prevents dust, rainwater and other impurities from the outside from entering the inside of the laser through the optical lens outer frame, thereby affecting the service life of the precise electronic components inside the laser, by arranging the first sealing ring between the end face of the first end of the optical lens outer frame and the laser body.

Description

Technical Field

[0001] This disclosure relates to the field of mechanical technology, and more specifically, to a laser. Background Technology

[0002] As an important tool in modern industry and scientific research, laser equipment faces stringent requirements for structural reliability in outdoor applications. Taking laser alignment equipment as an example, its core function relies on the coordinated operation of precision optical components and electronic control modules. The equipment typically adopts a split-type cabin design to house the optical lens, laser emitter, and supporting sensing units. Among these, the interface between the optical lens area exposed to the external environment and the cabin becomes a critical node in the sealing system. The sealing effect of this area directly affects the stability of the equipment under complex conditions such as rain and dust.

[0003] In outdoor operating environments, equipment must constantly confront the challenge of liquid penetration. Current technologies generally employ a flexible first sealing ring to form a physical barrier against liquid. However, in practical applications, it has been found that some equipment still experiences interface penetration under continuous rain or high humidity conditions. Liquid water seeps into the interior of the chamber through gaps, causing malfunctions such as fogging on lens surfaces and short circuits on circuit boards. In severe cases, it can lead to optical system misalignment or permanent damage to electronic components. Therefore, a systematic study of the failure mechanisms of existing sealing structures is urgently needed in engineering practice. Utility Model Content

[0004] This disclosure aims to solve the problem of liquid leakage in laser equipment operating outdoors, even with a first sealing ring installed.

[0005] This disclosure provides a laser. The laser includes a laser body, a laser housing, an optical lens frame, and a first sealing ring. The laser body includes a lens exposed within the laser body. The laser housing at least partially covers the laser body. The laser housing has a first lens aperture. The optical lens frame has an axially extending cylindrical structure. A first end of the optical lens frame is connected to the laser body and circumferentially surrounds the lens, and a second end of the optical lens frame is connected to the first lens aperture. The first sealing ring is disposed between the end face of the first end of the optical lens frame and the laser body.

[0006] This disclosure provides a first sealing ring between the end face of the first end of the optical lens frame and the laser body to prevent external impurities such as dust and rainwater from entering the laser through the optical lens frame and affecting the service life of the precision electronic components inside the laser.

[0007] In one exemplary embodiment, the inner surface of the optical lens frame and the surface of the lens define a lens region, and the first sealing ring is at least partially exposed in the lens region.

[0008] This disclosure exposes the first sealing ring to the lens area, placing it at the outermost edge of the gap between the laser body and the optical lens frame, allowing the sealing interface to directly contact the external environment. This design, by reconfiguring the spatial layout of the first sealing ring, reduces or even eliminates liquid retention cavities prone to water accumulation in the gap between the laser body and the optical lens frame. When corrosive liquids intrude along the gap, they first contact the first sealing ring and are directly blocked, preventing moisture retention within the gap. Simultaneously, this exposed layout allows operators to directly observe the surface condition of the first sealing ring, facilitating the removal of surface moisture through routine maintenance. This significantly reduces the time the seal is exposed to corrosive media, improving laser reliability and extending its service life.

[0009] In one exemplary embodiment, the end face of the first end of the optical lens frame has a groove configured to receive a first sealing ring.

[0010] A groove structure is designed at the first end of the outer frame of the optical lens to provide precise positioning and stable deformation space for the first sealing ring. After the first sealing ring is embedded in the groove, the sidewall of the groove constrains the first sealing ring, ensuring that it will not shift or twist when the equipment vibrates or the temperature changes.

[0011] In one exemplary embodiment, after the first sealing ring is compressed, the end face of the first sealing ring facing the laser body in the axial direction extends beyond the groove.

[0012] If insufficient thread preload or prolonged vibration during assembly causes axial displacement between the optical lens frame and the laser body, increasing the distance between them, the pressure on the first sealing ring in the groove along the pressure direction gradually decreases, reducing the actual contact pressure at the sealing interface. Within a certain range, the dynamic compensation of the first sealing ring's dimension along the pressure direction can still achieve the desired sealing effect. However, due to the dimensional limitations of the groove sidewalls, i.e., the groove depth, the dynamic compensation range for some first sealing rings along the pressure direction to achieve the desired sealing effect is relatively small.

[0013] This disclosure designs the axial end face of the first sealing ring in the compressed state to extend beyond the groove opening plane. This maximizes the dynamic compensation range of the first sealing ring to ensure the sealing effect is satisfactory before the optical lens outer frame contacts the laser body.

[0014] In an exemplary embodiment, the first sealing ring has a rectangular cross-section, and the groove has a rectangular cross-section.

[0015] When the first sealing ring is compressed, it is prone to popping out of the groove if the equipment is subjected to vibration or temperature changes. This is because the circular first sealing ring expands outwards under pressure. This disclosure sets the cross-section of the first sealing ring and the groove to rectangular shape. The mutually perpendicular planes of the rectangles prevent the first sealing ring from exiting the groove along its cross-section when it expands outwards under pressure. Furthermore, the rectangular cross-section of the first sealing ring has a significant angle between its planes compared to the circular cross-section, which also provides a condition for the first sealing ring to remain stable in the groove.

[0016] In an exemplary embodiment, the radial dimension of the first sealing ring is greater than the radial width of the groove. The wider radial dimension allows the first sealing ring to be interference-fitted with the groove, further securing the first sealing ring firmly within the groove.

[0017] In an exemplary embodiment, the radial dimension T of the first sealing ring and the radial width W of the groove satisfy the relationship: T = 1.1W to 1.3W. When the T / W ratio is less than 1.1, gap displacement may occur between the first sealing ring and the sidewall of the groove when the equipment experiences vibration or temperature changes, forming a capillary seepage channel. If the T / W ratio exceeds 1.3, the first sealing ring will be difficult to assemble, affecting installation efficiency.

[0018] In an exemplary embodiment, the laser further includes a connecting plate fixed to the laser body. The connecting plate has a second lens hole and is disposed on the laser. The second lens hole surrounds the lens in the circumferential direction. The sidewall of the second lens hole is provided with an internal thread. The outer frame of the optical lens is provided with an external thread at the first end that is adapted to the internal thread of the second lens hole.

[0019] The connecting plate allows the outer frame of the optical lens to be fixed to the laser body.

[0020] In one exemplary embodiment, the outer surface of the optical lens frame is cylindrical in the axial direction. That is, the outer surface of the second end of the optical lens frame is also cylindrical.

[0021] In practical applications, the outer frame of an optical lens often becomes loose from the connecting plate due to various reasons such as vibration and thermal expansion and contraction, affecting the sealing effect. In such cases, manual tightening is required. A common method is to provide a rotating drive feature with a surface structure on the outer surface of the optical lens frame that offers high friction. However, users are highly susceptible to accidental rotation of the optical lens frame due to accidental contact during equipment debugging or cleaning and maintenance. Therefore, to prevent accidental rotation of the optical lens frame, this disclosure designs the entire outer surface of the optical lens frame as a cylindrical surface, increasing the difficulty of rotation and reducing the risk of accidental rotation due to accidental contact.

[0022] In one exemplary embodiment, the optical lens frame has at least two holes on its end face at the second end, the holes being adapted to receive an external fastening fixture inserted to rotate the optical lens frame. When the outer surface of the optical lens frame is configured as a cylindrical surface to prevent unintended rotation, rotation of the optical lens frame is achieved by inserting an external fixture into the holes on the end face at the second end of the optical lens frame.

[0023] In one exemplary embodiment, a laser housing cover is connected to the outer surface of the optical lens frame near its second end. An annular protrusion is provided on the surface of the optical lens frame near its second end, surrounding the optical lens frame. A second sealing ring is provided between the laser housing cover and the annular protrusion. By providing an annular protrusion on the surface of the second end, an axial clamping force is provided to the second sealing ring disposed between the annular protrusion and the laser housing cover, thereby achieving a better sealing effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure, and not all of them.

[0025] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements (components or components).

[0026] It should be understood that the accompanying drawings are only schematic, and the dimensions and scale of the elements (components or parts) in the drawings are not necessarily precise.

[0027] Figure 1 An exploded structural diagram of the laser provided in this disclosure is shown.

[0028] Figure 2 It shows Figure 1 A schematic diagram of the cross-section of the laser shown.

[0029] Figure 3 for Figure 2 A magnified view of region A in the middle.

[0030] Figure 4 A schematic diagram of the structure of an optical lens frame according to an embodiment of the present disclosure is shown.

[0031] Figure 5 It shows Figure 1 A cross-sectional schematic diagram of the outer frame of the optical lens is shown.

[0032] Figure 6 A schematic diagram of the structure of an optical lens frame according to another embodiment of the present disclosure is shown.

[0033] Figure 7A partial cross-sectional schematic diagram of a laser according to an embodiment of the present disclosure is shown.

[0034] Figure 8 A partial cross-sectional schematic diagram of a laser according to another embodiment of the present disclosure is shown.

[0035] Figure 9 A partial assembly schematic diagram of a laser according to an embodiment of the present disclosure is shown.

[0036] Figure 10 It shows Figure 9 The diagram shows a cross-sectional view and a partially enlarged view of the laser after assembly.

[0037] Figure 11 An assembly diagram of an optical lens frame and fastening fixture according to an embodiment of the present disclosure is shown.

[0038] Figure 12 A partial structural schematic diagram of a laser according to an embodiment is shown.

[0039] Figure 13 It shows Figure 12 The diagram shows a cross-sectional view of the laser.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10: Laser;

[0042] 11: Laser body; 112: Lens; 113: Housing;

[0043] 12: Laser housing cover; 121: First lens hole; 122: Inner surface of laser housing cover;

[0044] 13: Optical lens frame; 131: First end of optical lens frame; 1311: End face of the first end of optical lens frame; 132: Second end of optical lens frame; 133: Outer surface of optical lens frame; 134: Inner surface of optical lens frame; 135: Groove; 136: Annular protrusion; 137: Insertion hole.

[0045] 14: First sealing ring; 141: First end face of the first sealing ring;

[0046] 15: Connecting plate; 152: Second lens hole;

[0047] 16: Second sealing ring;

[0048] 20: Laser housing;

[0049] 30: Lens area;

[0050] 40: External fastening fixtures. Detailed Implementation

[0051] The technical solutions of the embodiments of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them.

[0052] like Figures 1-2 As shown, this disclosure provides a laser 10, which includes a laser body 11, a laser housing 12, an optical lens frame 13, and multiple electronic units (not shown). The laser body 11 includes a lens 112 and a housing 113, with the lens 112 exposed at the front end of the housing 113. The laser body 11 is disposed inside the laser housing 12, and the relative positions of the laser body 11 and the laser housing 12 are fixed by a support rod. The optical lens frame 13 extends along the axial direction and has a hollow cylindrical structure. The optical lens frame 13 has a first end 131 and a second end 132 along the axial direction, with the first end 131 connected to the laser body 11. Specifically, it is connected to the housing 113 of the laser body 11. The first end 131 of the optical lens frame surrounds the lens 112 circumferentially. The laser light emitted by the lens can be emitted from the second end 132 of the optical lens frame. The second end 132 of the optical lens frame is connected to the laser housing 12. The laser housing 12 has a first lens hole 121, which is coaxially aligned with the optical lens frame. Specifically, the second end 132 of the optical lens frame is connected to the first lens hole 121. The laser body 11, the inner surface 122 of the laser housing, and the outer surface 133 of the optical lens frame 13 together define the laser housing 20, which is used to house multiple electronic units.

[0053] like Figure 3 As shown, the laser 10 also includes a first sealing ring 14, which is disposed between the end face 1311 of the first end of the optical lens frame and the laser body 11, and is partially exposed in the lens region 30. This ring is used to prevent moisture from seeping into the laser housing 20 from the lens region 30, thus affecting the lifespan of the precision electronic components inside the laser.

[0054] In one exemplary embodiment, see continue to see Figures 1-2 The inner surface 134 of the optical lens frame 13 and the surface of the lens 112 define the lens region 30, and the first sealing ring 14 is at least partially exposed in the lens region 30.

[0055] The applicant found corrosion on the first sealing ring in multiple lasers that had experienced sealing failure. Considering the lasers' usage scenarios, such as exposure to acid rain, it can be confirmed that the corrosion was caused by the first sealing ring. Analysis showed that during the process of corrosive liquid penetrating from the lens area into the laser housing, the liquid entered through the gap between the lens frame and the laser housing, was blocked by the first sealing ring, and was eventually trapped in the gap. This portion of corrosive liquid then began to corrode the first sealing ring over a long period of time.

[0056] As mentioned above, another decisive factor in sealing effectiveness lies in the layout of the sealing structure, specifically whether there is a gap on the circumferential side of the first sealing ring that blocks moisture, allowing liquid to remain. Traditionally, the first sealing ring is placed inside the gap. While this achieves direct protection of the internal space of the chamber through elastic deformation, this layout objectively creates a semi-enclosed liquid retention chamber between the first sealing ring and the external environment. When the equipment is exposed to rain or high humidity, liquid water or moisture can infiltrate along the gap between the lens frame and the chamber, forming a localized water accumulation area within the liquid retention chamber. Because this area lacks an active drainage channel and is located on the inner circumference of the first sealing ring, the residual moisture cannot evaporate naturally or be manually removed, creating a continuously wetting environment in contact with the sealing material. Prolonged immersion of the first sealing ring in a humid environment causes aging reactions such as swelling and hydrolysis on the surface of its polymer material, leading to a decrease in the pre-tightening force of the sealing interface and ultimately causing sealing failure.

[0057] To address this issue, this disclosure exposes the first sealing ring to the lens area, positioning it at the outermost edge of the gap between the laser body and the optical lens frame, allowing the sealing interface to directly contact the external environment. This design, by reconfiguring the spatial layout of the first sealing ring, reduces or even eliminates areas prone to water accumulation in the gap between the laser body and the optical lens frame. When corrosive liquids intrude along the gap, they first contact the first sealing ring and are directly blocked, preventing moisture retention within the gap. Simultaneously, this exposed layout allows operators to directly observe the surface condition of the first sealing ring, facilitating the removal of surface moisture through routine maintenance. This significantly reduces the time the ring is exposed to corrosive media, improving laser reliability and extending its service life.

[0058] In one exemplary embodiment, a first end of the optical lens frame has a groove configured to receive a first sealing ring.

[0059] like Figures 4-5 As shown, the groove 135 is annular and formed on the end face of the first end of the optical lens frame. The radial dimension of the opening of the groove 135 is greater than or equal to the radial dimension of the bottom of the groove 135, so as to facilitate the assembly of the first sealing ring therein.

[0060] Exemplarily, in other embodiments, such as Figure 6 As shown, the bottom of the groove 135 is exposed on the side to the inner surface 132 of the optical lens frame. Furthermore, the side of the bottom of the groove 135 near the inner surface 132 of the optical lens frame is closer to the first end 131 of the optical lens frame than the side near the outer surface 133 of the optical lens frame, in order to prevent the first sealing ring from moving toward the inner surface of the optical lens frame when under pressure, thus firmly confining the first sealing ring within the groove.

[0061] A groove structure is designed at the first end of the outer frame of the optical lens to provide precise positioning and stable deformation space for the first sealing ring. After the first sealing ring is embedded in the groove, the sidewall of the groove constrains the first sealing ring, ensuring that it will not shift or twist when the equipment vibrates or the temperature changes.

[0062] In one exemplary embodiment, after the first sealing ring is compressed, the end face of the first sealing ring facing the laser body extends beyond the groove.

[0063] like Figures 7-8 The diagram illustrates the relationship between the first sealing ring and the groove in the compressed state. The first sealing ring 14 is located within the groove 135. The axially facing end face of the first sealing ring 14 towards the laser body 11 is the first end face 141 of the first sealing ring, which faces the laser body 11. The first end face 141 of the first sealing ring extends beyond the opening of the groove 135, that is, it extends beyond the first end face 1311 of the optical lens frame. The gap width between the optical lens frame 13 and the laser body 11 is the height of the first end face 141 of the first sealing ring extending beyond the opening of the groove 135.

[0064] If insufficient thread preload or prolonged vibration during assembly causes axial displacement between the optical lens frame and the laser body, increasing the distance between them, the pressure on the first sealing ring in the groove along the pressure direction gradually decreases, reducing the actual contact pressure at the sealing interface. Within a certain range, the dynamic compensation of the first sealing ring's dimension along the pressure direction can still achieve the desired sealing effect. However, due to the dimensional limitations of the groove sidewalls, i.e., the groove depth, the dynamic compensation range for some first sealing rings along the pressure direction to achieve the desired sealing effect is relatively small.

[0065] This disclosure designs the axial end face of the first sealing ring in the compressed state to extend beyond the groove opening plane. This maximizes the dynamic compensation range of the first sealing ring to ensure the sealing effect is satisfactory before the optical lens outer frame contacts the laser body.

[0066] In an exemplary embodiment, the first sealing ring has a rectangular cross-section, and the groove has a rectangular cross-section.

[0067] When the first sealing ring is compressed, it is prone to popping out of the groove if the equipment is subjected to vibration or temperature changes. This is because the circular first sealing ring expands outwards under pressure. This disclosure sets the cross-section of the first sealing ring and the groove to rectangular shape. The mutually perpendicular planes of the rectangles prevent the first sealing ring from exiting the groove along its cross-section when it expands outwards under pressure. Furthermore, the rectangular cross-section of the first sealing ring has a significant angle between its planes compared to the circular cross-section, which also provides a condition for the first sealing ring to remain stable in the groove.

[0068] In an exemplary embodiment, the radial dimension of the first sealing ring is greater than the radial width of the groove. The wider radial dimension allows the first sealing ring to be interference-fitted with the groove, further securing the first sealing ring firmly within the groove.

[0069] Preferably, the radial dimension T of the first sealing ring and the radial width W of the groove satisfy the relationship: T = 1.1W ~ 1.3W. When the T / W ratio is less than 1.1, gap displacement may occur between the first sealing ring and the sidewall of the groove when the equipment experiences vibration or temperature changes, forming capillary seepage channels. If the T / W ratio exceeds 1.3, assembly difficulties arise, affecting installation efficiency.

[0070] In an exemplary embodiment, the laser further includes a connecting plate fixed to the laser body. The connecting plate has a second lens hole and is disposed on the laser. The second lens hole surrounds the lens in the circumferential direction. The sidewall of the second lens hole is provided with an internal thread. The outer frame of the optical lens is provided with an external thread at the first end that is adapted to the internal thread of the second lens hole.

[0071] like Figures 9-10 As shown, one axial end face of the connecting plate 15 rests on the laser body 11. The connecting plate 15 has a second lens hole 152. The second lens hole 152 axially extends through the connecting plate 15. The second lens hole 152 surrounds the lens 112 in the circumferential direction. The second lens hole 152 has a cylindrical inner surface. The optical lens frame 13 is connected to the connecting plate 15 by an external thread on the outer surface of the first end 131 of the optical lens frame and an internal thread on the side wall (inner surface) of the second lens hole 152, thereby fixing it to the laser body 11. As the thread engagement between the optical lens frame 13 and the connecting plate 15 increases, the pressure on the first sealing ring 14 located between the optical lens frame and the laser body increases.

[0072] In one exemplary embodiment, see continue to see Figure 9 Along the axial direction, the outer surface of the optical lens frame 13 is cylindrical. That is to say, the outer surface of the second end 132 of the optical lens frame is also cylindrical.

[0073] In practical applications, the outer frame of an optical lens often becomes loose from the connecting plate due to various reasons such as vibration and thermal expansion and contraction, affecting the sealing effect. In such cases, manual tightening is required. A common method is to provide a rotating drive feature with a surface structure on the outer surface of the optical lens frame that offers high friction. However, users are highly susceptible to accidental rotation of the optical lens frame due to accidental contact during equipment debugging or cleaning and maintenance. Therefore, to prevent accidental rotation of the optical lens frame, this disclosure designs the entire outer surface of the optical lens frame as a cylindrical surface, increasing the difficulty of rotation and reducing the risk of accidental rotation due to accidental contact.

[0074] In one exemplary embodiment, such as Figure 11 As shown, the end face of the second end 132 of the optical lens frame has at least two insertion holes 137, which are adapted to receive external fastening fixtures 40 for rotating the optical lens frame 13. The insertion holes are blind holes.

[0075] In order to prevent unexpected rotation, the outer surface of the optical lens frame is set as a cylindrical surface. The rotation of the optical lens frame is achieved by setting at least two insertion holes on the end face of the second end of the optical lens frame and inserting an external tool into the insertion holes.

[0076] In one exemplary embodiment, the laser housing cover is connected to the outer surface of the optical lens frame near the second end, and an annular protrusion is provided on the outer surface of the end face of the optical lens frame near the second end, the annular protrusion surrounds the optical lens frame, and a second sealing ring is provided between the laser housing cover and the annular protrusion.

[0077] like Figures 12-13 As shown, the second end 132 of the optical lens outer frame extends from the first lens hole 121 of the laser housing 12 and beyond the surface of the laser housing 12. An annular protrusion 136 is formed on the outer surface of the optical lens outer frame 13, circumferentially surrounding the optical lens outer frame. A gap exists between the end face of the annular protrusion 136 facing the laser housing 12 and the surface of the laser housing 12. A second sealing ring 16 is disposed in this gap, and its axial dimension is 1.1 to 1.3 times the gap. The two axial end faces of the second sealing ring 16 are respectively in close contact with the axial end face of the annular protrusion 136 and the surface of the laser housing 12. The annular protrusion applies a clamping force to the second sealing ring through a threaded connection between the optical lens outer frame and the connecting plate, ensuring the seal of the gap between the optical lens outer frame and the laser housing.

[0078] A better sealing effect is achieved by providing an annular protrusion on the surface of the second end to provide axial clamping force to the second sealing ring disposed between the annular protrusion and the laser housing cover.

[0079] It should be understood that the term "comprising" and its variations as used in this disclosure are open-ended, meaning "including but not limited to". The term "one embodiment" means "at least one embodiment", and the term "another embodiment" means "at least one additional embodiment".

[0080] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium. Similarly, "abutment" can refer to a direct abutment or an indirect abutment through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0081] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A laser, characterized in that, include, A laser body, including a lens, the lens being exposed within the laser body; A laser housing cover, covering the laser body, the laser housing cover having a first lens hole; An optical lens frame is a cylindrical structure that runs through the axis. The first end of the optical lens frame is connected to the laser body and surrounds the lens in the circumferential direction. The second end of the optical lens frame is connected to the first lens aperture. as well as The first sealing ring is disposed between the end face of the first end of the outer frame of the optical lens and the laser body.

2. The laser according to claim 1, characterized in that, The inner surface of the optical lens frame and the surface of the lens define a lens area, and the first sealing ring is at least partially exposed in the lens area.

3. The laser according to claim 1, characterized in that, The first end of the optical lens frame has a groove configured to receive the first sealing ring.

4. The laser according to claim 3, characterized in that, After the first sealing ring is compressed, the end face of the first sealing ring facing the laser body in the axial direction extends beyond the groove.

5. The laser according to claim 4, characterized in that, The first sealing ring has a rectangular cross-section, and the groove has a rectangular cross-section.

6. The laser according to claim 3, characterized in that, The radial dimension of the first sealing ring is greater than the radial width of the groove.

7. The laser according to claim 6, characterized in that, The radial dimension T of the first sealing ring and the radial width W of the groove satisfy the following relationship: T = 1.1W ~ 1.3W.

8. The laser according to claim 1, characterized in that, It also includes a connecting plate fixed to the laser body, the connecting plate having a second lens hole that surrounds the lens in the circumferential direction, the sidewall of the second lens hole having an internal thread, and the outer surface of the optical lens frame having an external thread that matches the internal thread on the outer surface of the first end of the optical lens frame.

9. The laser according to claim 8, characterized in that, Along the axial direction, the outer surface of the optical lens frame is cylindrical in shape.

10. The laser according to claim 9, characterized in that, The optical lens frame has at least two insertion holes on the end face of the second end, the insertion holes being adapted to receive external fastening fixtures for rotating the optical lens frame.

11. The laser according to claim 1, characterized in that, The laser housing cover is connected to the outer surface of the end face near the second end of the optical lens frame. An annular protrusion is provided on the surface of the optical lens frame near the second end. The annular protrusion surrounds the optical lens frame. A second sealing ring is provided between the laser housing cover and the annular protrusion.

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