Infrared sighting telescope with self-adapting protection structure

Abstract

The application relates to the technical field of infrared sighting scopes, and particularly discloses an infrared sighting scope with a self-adaptive protection structure, which comprises a mirror body, an eyepiece cover and a main buffering structure installed on the eyepiece cover, the eyepiece cover is installed on the mirror body, the eyepiece cover is sequentially provided with an eye-approaching section, a deformation section and a buffering section along the length direction of the eyepiece cover, the main buffering structure comprises a closed annular buffering cavity formed in the buffering section and a buffering medium filled in the buffering cavity, the buffering section can be radially expanded during pressure, and the simultaneously arranged buffering medium can improve equivalent stiffness under the action of a high strain rate, so that impact response type support and energy absorption are realized. The application can significantly reduce the impact load transmitted to the eyes, avoid damage caused by rigid contact, and realize the effect of giving consideration to use comfort and protection.

Description

Technical Field

[0001] This application relates to the field of infrared aiming technology, and in particular to an infrared aiming scope with an adaptive protection structure. Background Technology

[0002] Infrared sights, as optoelectronic devices based on infrared imaging principles for target detection and aiming, are widely used in scenarios such as nighttime operations, low-light environment observation, and target identification under complex weather conditions. In practical use, operators typically need to place their eye close to the eyepiece area to obtain clear imaging information, thereby completing aiming and observation tasks. To improve observation comfort and reduce the interference of stray light on image quality, infrared sights generally have an eyepiece hood structure at the eyepiece end to create a relatively enclosed observation space, while also enhancing the human-machine interface.

[0003] As the application environment of equipment expands from relatively stable observation scenarios to complex conditions such as field mobility and rapid deployment, higher requirements are placed on the safety and protective performance of the eyepiece area. Existing infrared sights typically use eyepiece covers made of silicone rubber, thermoplastic elastomer (TPE), or soft polyurethane in a single molded piece. Their structure is usually a hollow cylindrical shape with one end flared, and they are fixed to the eyepiece housing via snap-fit, sleeve, or threaded connections. Functionally, these eyepiece covers rely on the material's flexible deformation properties to create a certain degree of coverage when conforming to the user's eye socket area, thereby blocking stray light from entering the eyepiece and improving wearing comfort.

[0004] Based on the aforementioned existing technical solutions, it can be seen that while the eyepiece cover can provide a certain degree of comfort and light-blocking effect under normal static contact, its protective capability is significantly insufficient under dynamic or sudden conditions. Specifically, when an infrared sight is accidentally dropped, collided, or subjected to external impact during use, the impact load will be directly transmitted to the eyepiece end along the sight's structure. Since the eyepiece cover relies solely on material elasticity for cushioning, its limited deformation is insufficient to effectively dissipate the impact energy, resulting in the remaining impact force acting on the user's eye area, thus posing a risk of orbital contusion or even more serious injury. Summary of the Invention

[0005] This application provides an infrared sight with an adaptive protection structure. When subjected to a sudden impact, the protective structure set on the eyepiece frame can form a buffer isolation layer of a certain thickness between the eyepiece frame and the user's eye socket, thereby effectively extending the impact path and absorbing the impact energy, significantly reducing the impact load transmitted to the eye, and avoiding damage caused by rigid contact.

[0006] This application provides an infrared sight with an adaptive protection structure, which adopts the following technical solution: An infrared sight with an adaptive protection structure includes a sight body, wherein an objective lens end and an eyepiece end are respectively disposed on the sight body, and an eyepiece frame is disposed on the eyepiece end; An eyepiece cover is fitted onto the eyepiece frame. The eyepiece cover has an eye-fitting section, a deformable section, and a buffer section arranged sequentially along its length. The end of the eye-fitting section opposite to the deformable section is shaped like a flared mouth. The buffer section is provided with an active buffer structure. The active buffer structure is triggered when the infrared sight is subjected to an external impact and undergoes relative displacement toward the user's eye, thereby forming a buffer isolation layer of a certain thickness between the eye-fitting section and the sight body to prevent the eyepiece frame from making rigid contact with the user's eye socket. The active buffer structure includes a closed annular buffer cavity formed in the buffer section and a buffer medium filled in the buffer cavity. The buffer section will expand radially during the compression process, and the buffer medium will increase the equivalent stiffness under high strain rate, thereby realizing impact-responsive support and energy absorption.

[0007] By adopting the above technical solution, and by setting a segmented structure of eye-fitting section, deformation section and buffer section on the eyepiece cover, and constructing a closed annular buffer cavity in the buffer section and filling it with a buffer medium with high strain rate response characteristics, the eyepiece cover maintains good flexible fit performance under normal use. When subjected to sudden impact, the radial expansion of the buffer section and the stiffening response of the buffer medium can form a buffer isolation layer of a certain thickness between the eyepiece frame and the user's eye socket. This effectively prolongs the impact path and absorbs impact energy, significantly reduces the impact load transmitted to the eye, avoids damage caused by rigid contact, and achieves an adaptive protection effect that balances comfort and protection.

[0008] Optionally, the active buffer structure further includes a guide piece fixedly embedded in the buffer section. The wall thickness of the buffer section is greater than the wall thickness of the eye-attaching section. The guide piece is set as an arc-shaped piece, and the length direction of the guide piece is parallel to the axial direction of the buffer section. Multiple guide pieces are arranged circumferentially on the buffer section. The multiple guide pieces are evenly and symmetrically distributed on both sides of the buffer cavity. When the guide piece bends under axial pressure, the guide piece can drive the buffer section to deform outward in the radial direction, thereby increasing the contact area of ​​the force and dispersing the impact load originally concentrated on the eyepiece frame to a larger area around the eye socket, thereby significantly reducing the local contact pressure.

[0009] By adopting the above technical solution, by setting an axially arranged arc-shaped guide plate in the buffer section and making multiple guide plates evenly and symmetrically distributed in the circumferential direction, when subjected to axial impact load, the guide plate can bend and deform and drive the buffer section to expand outward in the radial direction, thereby diffusing the impact load originally concentrated in the local area of ​​the eyepiece frame to the periphery of the eye socket, significantly increasing the force contact area and reducing the local contact pressure, effectively avoiding damage to the eye caused by local high stress concentration; Meanwhile, since the guide plate is arranged axially and its bending deformation depends on a certain amplitude of axial compressive load, under normal wearing conditions, the eyepiece mainly bears the fitting and squeezing force of low strain and small load. At this time, the guide plate will not undergo significant bending deformation, thus not driving the buffer section to generate radial expansion, thereby avoiding premature triggering of the active buffer structure and allowing the eyepiece to maintain good flexible fitting performance and usage comfort. Only under sudden impact or high strain rate load will the guide plate bend effectively and trigger the buffer response, thereby realizing adaptive switching between normal use state and impact protection state, improving the pertinence and reliability of structural response.

[0010] Optionally, the buffer cavity is provided with a separator, the buffer medium is disposed in the separator, the buffer medium is configured as a shear-thickening gel, the separator is configured as an annular separator, and four sets of separators are disposed in the buffer cavity. The four sets of separators are respectively located at four equal divisions of the buffer cavity circumferentially. When the guide plate drives the buffer section to deform radially outward, the four sets of separators generate relative displacement between each other and apply shear force to the shear-thickening gel, thereby buffering the impact load.

[0011] By adopting the above technical solution, multiple compartments are set in the buffer cavity to encapsulate the buffer medium in sections. Compared with the structure that fills the buffer medium entirely in the buffer cavity, this effectively constrains the spatial distribution of the buffer medium during compression and radial expansion deformation of the buffer section, preventing it from flowing and accumulating or becoming empty in local areas. This ensures that an effective buffer medium is continuously present throughout the entire deformation area, improving the coverage and stability of the buffer response. At the same time, the compartments cooperate with the structural deformation driven by the guide plate during the deformation of the buffer section, causing controlled relative displacement between the compartments. This applies a stable shearing force to the internal shear-thickening gel, achieving impact energy dissipation while helping to maintain the relative stability of the overall structure of the buffer section. This avoids local collapse or uncontrolled deformation caused by disordered flow of the medium, thereby further improving the reliability and consistency of the impact protection process.

[0012] Optionally, the buffer section is provided with a guide ring and an abutment ring. The guide ring and the abutment ring are coaxially fixedly embedded in the buffer section. The guide ring is located at one end of the buffer section near the deformable section, and the abutment ring is located at the other end of the buffer section. One end of the guide piece abuts against the guide ring, and the other end of the guide piece abuts against the abutment ring.

[0013] By adopting the above technical solution, the guide ring and the abutment ring are set to support and limit the two ends of the guide plate, so that the guide plate can bend and deform in a predetermined direction during the compression process, thereby ensuring the stability and consistency of the radial expansion process of the buffer section, avoiding structural instability or local abnormal deformation, improving the controllability and repeatability of the impact response process, and further enhancing the reliability of the overall protective structure.

[0014] Optionally, an annular guide groove is formed on the inner wall of the buffer cavity. Two sets of guide grooves are provided, and the two sets of guide grooves are symmetrically arranged on the inner walls of the two sides in the height direction of the buffer cavity.

[0015] By employing the above technical solution, symmetrical annular guide grooves are formed on the inner walls of both sides of the buffer cavity along its height direction. When the guide piece is subjected to axial pressure and bends away from the buffer cavity, it can form a stable guiding fit with the guide grooves. This further transforms the bending deformation of the guide piece into a radial pushing effect on the buffer section wall, causing a more complete and controllable radial expansion in the area corresponding to the buffer cavity within the buffer section. Therefore, on the one hand, the buffer isolation thickness formed by the buffer section under impact is increased, preventing rigid contact between the eyepiece frame and the user's eye socket; on the other hand, the directional stability of the outward expansion deformation of the buffer section is improved, preventing only local collapse or disordered compression of the buffer section, thereby enhancing the impact response reliability and protective effect of the active buffer structure.

[0016] Optionally, the deformable section is configured as a corrugated tube structure with alternating peaks and valleys, with the inner diameter of the end of the deformable section near the buffer section set as d1, and the inner diameter of the end of the deformable section near the eye patch section set as d2, where d1 > d2.

[0017] By adopting the above technical solution, and by setting the deformable section as a corrugated pipe structure with alternating peaks and valleys, the eye section and the deformable section can undergo controllable compression when subjected to axial impact, thereby absorbing part of the impact energy and providing a primary buffer stroke. At the same time, the inner diameter of the deformable section near the buffer section is set to be larger than the inner diameter of the end near the eye section, so that the eye section and the deformable section can form a more stable force transition to the buffer section side after compression. This ensures that the impact load is concentrated and reliably applied to the end of the buffer section, thereby stably triggering the radial outward deformation of the buffer section and the shear thickening response of the buffer medium, avoiding the problem of insufficient triggering of the active buffer structure due to skewed compression deformation or unstable force position.

[0018] Optionally, the buffer section has a through-hole groove at one end away from the deformable section, and a snap-fit ​​part is fixed on the inner wall of one side of the insertion groove. The eyepiece frame has a snap-fit ​​groove, and the insertion part is fixed on the outer wall of one side of the snap-fit ​​groove. The insertion part is inserted into the insertion groove, and the snap-fit ​​part is snap-fitted into the snap-fit ​​groove.

[0019] By adopting the above technical solution and setting a composite connection structure that combines plug-in and snap-fit, the eyepiece cover can be reliably fixed to the eyepiece frame. While ensuring convenient installation, it improves the stability and anti-detachment ability of the connection structure under impact load, avoids structural loosening or failure during sudden impact, and thus ensures that the protective structure can continue to function.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting an axially arranged arc-shaped guide plate in the buffer section, under normal wearing conditions, the eyepiece mainly bears the low strain and small load of the fitting and squeezing force. At this time, the guide plate will not undergo significant bending deformation, thus preventing the buffer section from expanding radially. This avoids premature triggering of the active buffer structure, allowing the eyepiece to maintain good flexible fitting performance and usage comfort. When subjected to axial impact load, the guide plate can bend and deform, driving the buffer section to expand outward in the radial direction. This diffuses the impact load, which was originally concentrated in a local area of ​​the eyepiece frame, to the periphery of the eye socket, significantly increasing the contact area and reducing the local contact pressure. This effectively avoids damage to the eye caused by local high stress concentration, thereby achieving adaptive switching between normal use and impact protection states, and improving the targetedness and reliability of the structural response. 2. By setting multiple compartments within the buffer cavity to encapsulate the buffer medium in sections, the spatial distribution of the buffer medium is effectively constrained during compression and radial expansion deformation of the buffer section. This ensures that an effective buffer medium continuously participates in the entire deformation area, improving the coverage and stability of the buffer response. Simultaneously, the compartments cooperate with the structural deformation driven by the guide plate during the deformation of the buffer section, resulting in controlled relative displacement between the compartments. This applies a stable shearing force to the internal shear-thickening gel, achieving impact energy dissipation while helping to maintain the relative stability of the overall structural morphology of the buffer section. This avoids local collapse or uncontrolled deformation caused by disordered medium flow, thereby further improving the reliability and consistency of the impact protection process. 3. By setting the deformable section as a corrugated structure with alternating peaks and valleys, the eye section and the deformable section can undergo controlled compression when subjected to axial impact, thereby absorbing part of the impact energy and providing a primary buffer stroke. At the same time, the inner diameter of the deformable section near the buffer section is set to be larger than that of the end near the eye section, so that the eye section and the deformable section can form a more stable force transition to the buffer section side after compression. This ensures that the impact load is concentrated and reliably applied to the end of the buffer section, thereby stably triggering the radial outward deformation of the buffer section and the shear thickening response of the buffer medium, avoiding the problem of insufficient triggering of the active buffer structure due to skewed compression deformation or unstable force position. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the infrared aiming scope in the embodiments of this application.

[0022] Figure 2 This is a partial cross-sectional schematic diagram of the infrared aiming scope in an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of a half-section of the eyepiece cover in an embodiment of this application.

[0024] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0025] Figure 5 This is a schematic diagram of the structure of the eyepiece cover in the radial expansion state in an embodiment of this application.

[0026] Reference numerals: 1. Lens body; 11. Objective lens end; 12. Eyepiece end; 13. Eyepiece frame; 131. Snap-fit ​​groove; 132. Insertion part; 2. Eyepiece cover; 21. Eye contact section; 22. Deformation section; 23. Buffer section; 231. Insertion groove; 232. Snap-fit ​​part; 3. Active buffer structure; 31. Buffer cavity; 311. Guiding groove; 32. Buffer medium; 33. Guide plate; 34. Divider; 35. Guide ring; 36. Abutment ring. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail below.

[0028] This application discloses an infrared sight with an adaptive protection structure.

[0029] Reference Figure 1 and Figure 2 An infrared sight with an adaptive protection structure includes a scope body 1, an eyepiece cover 2, and an active buffer structure 3. The scope body 1 is provided with an objective lens end 11 and an eyepiece end 12. The eyepiece cover 2 is installed on the eyepiece end 12, and the active buffer structure 3 is installed on the eyepiece cover 2. The scope body 1 is used to enable nighttime operations, low-light environment observation, and target identification under complex weather conditions. The eyepiece cover 2 is used to provide a certain covering effect when it fits against the user's eye socket area, thereby blocking external stray light from entering the eyepiece and improving wearing comfort. The active buffer structure 3 is triggered when the infrared sight is subjected to external impact and moves relative to the user's eye, thereby forming a buffer isolation layer of a certain thickness between the eye-fitting section 21 and the scope body 1 to prevent the eyepiece frame 13 from directly contacting the user's eye socket and avoiding eye contusions caused by external impact.

[0030] Reference Figure 1 In this embodiment, the mirror body 1 includes a housing, an optical receiving module, an infrared detection module, a signal processing module, a display module, and a power supply. These components are all integrated within the housing, forming a unified structure. The housing has an objective lens end 11 and an eyepiece end 12. The optical receiving module includes an objective lens assembly and a focusing assembly. The objective lens assembly is mounted on the objective lens end 11 and includes at least one lens unit made of infrared-transmitting material. These lens units are arranged sequentially along the optical axis to form a lens group. The focusing assembly is mounted on the eyepiece end 12 and is used to move the objective lens assembly along the optical axis to adjust the imaging focal length.

[0031] The infrared detection module is located on one side of the objective lens assembly. The infrared detection module is used to convert infrared radiation signals into electrical signals. The signal processing module is used to amplify, convert analog to digital and process the signal output by the infrared detection module. The signal processing module is electrically connected to the infrared detection module and the display module. The power supply is used to provide power to the lens body 1.

[0032] The bottom of the housing is provided with a connector. The infrared sight 1 is mounted on the external support structure through the connector. The connector is set as a guide rail snap-fit ​​structure and is fixed on the external support structure with bolts.

[0033] Reference Figure 2 and Figure 3 In this embodiment, an eyepiece frame 13 is fixedly mounted on the eyepiece end 12 of the lens body 1, and an eyepiece cover 2 is fitted onto the eyepiece frame 13. The eyepiece cover 2 is made of weather-resistant elastic material. In this embodiment, the weather-resistant elastic material can be silicone rubber, TPE, or polyurethane. The eyepiece cover 2 has an eye-fitting section 21, a deformation section 22, and a buffer section 23 arranged sequentially along its length. Both the eye-fitting section 21 and the buffer section 23 are cylindrical, and the wall thickness of the buffer section 23 is greater than the wall thickness at the eye-fitting section. One end of the eye-fitting section 21 is fixedly connected to one end of the deformation section 22. The end of the eye-fitting section 21 facing away from the deformation section 22 is flared, and the end of the deformation section 22 facing away from the eye-fitting section 21 is fixedly connected to one end of the buffer section 23.

[0034] The deformable section 22 is configured as a corrugated tube structure with alternating peaks and valleys. The inner diameter of the end of the deformable section 22 near the buffer section 23 is set as d1, and the inner diameter of the end of the deformable section 22 near the eye-fitting section 21 is set as d2, where d1 > d2.

[0035] A insertion groove 231 is provided through one end of the buffer section 23 away from the deformation section 22. A snap-fit ​​part 232 is fixed on the side of the insertion groove 231 away from the eyepiece frame 13. The snap-fit ​​part 232 is located on the inner wall of the buffer section 23. A snap-fit ​​groove 131 is provided on the eyepiece frame 13. A insertion groove 132 is fixed on one side of the snap-fit ​​groove 131. The eyepiece cover 2 is sleeved on the eyepiece frame 13. The insertion groove 132 is inserted into the insertion groove 231 and the snap-fit ​​part 232 is snapped into the snap-fit ​​groove 131.

[0036] In addition, a retaining ring is fitted on the eyepiece frame 13. The retaining ring is threadedly connected to the eyepiece frame 13 and is used to fix the eyepiece cover 2 on the eyepiece frame 13.

[0037] Reference Figure 3 , Figure 4 and Figure 5In this embodiment, an active buffer structure 3 is provided on the buffer section 23. The active buffer structure 3 includes a closed annular buffer cavity 31 formed in the buffer section 23, a buffer medium 32 filled in the annular buffer cavity 31, a guide plate 33 embedded in the buffer section 23, a guide ring 35 and an abutment ring 36 respectively fixedly embedded at both ends of the buffer section 23, and a partition sac 34 fixed on the inner wall of the buffer cavity 31. In the initial state, the buffer cavity 31 is set as a cylindrical annular cavity, and the buffer medium 32 is placed in the buffer cavity 31. The buffer medium 32 is a shear-thickening gel. The shear-thickening gel mentioned in this embodiment refers to a non-Newtonian fluid material whose internal structure rearranges under the condition of increased shear rate when subjected to external force, thereby exhibiting a significant increase in apparent viscosity with increasing shear rate. Such materials exhibit low viscosity or soft flow state at low speed or in a static state, but can transform into a high viscosity or even a near-solid state in a short time when subjected to rapid impact or high shear.

[0038] Based on the above characteristics, the shear-thickening gel can maintain good flexibility under low-speed contact or small deformation conditions, without affecting the fit and comfort of the eyepiece cover 2 body; while under transient impact, due to the rapid increase in local shear rate, its viscosity rises rapidly, thereby forming a transient high-damping support in the buffer cavity 31, which is beneficial for absorbing impact energy and limiting the rapid compression of the buffer section 23. The shear-thickening gel can be selected from existing shear-thickening material systems, such as a suspension system formed by dispersing solid particles in a liquid medium, or a polymer gel system formed by modification treatment. Those skilled in the art can make conventional selections based on the operating temperature range, stability requirements, and sealing conditions.

[0039] The guide plate 33, guide ring 35 and abutment ring 36 are all fixedly embedded in the buffer section 23. The guide ring 35 is located at one end of the buffer section 23 near the deformable section 22, and the abutment ring 36 is located at one end of the buffer section 23 away from the deformable section 22. The guide ring 35 and abutment ring 36 are coaxially arranged with the buffer section 23. The guide plate 33 is located between the guide ring 35 and the abutment ring 36. One end of the guide plate 33 abuts against the guide ring 35, and the other end of the guide plate 33 abuts against the abutment ring 36.

[0040] The guide plate 33 is designed as an arc-shaped thin sheet, made of elastic metal material or reinforced engineering plastic, with a thickness of 0.3 to 1.5 mm, to ensure both flexibility and sufficient force transmission capacity. The guide plate 33 is arranged parallel to the length direction of the buffer section 23, and an annular guide groove 311 is formed at the middle position of the buffer section 23 along its own length direction. The guide groove 311 is located on the inner wall of the buffer cavity 31.

[0041] Multiple guide pieces 33 are arranged circumferentially on the buffer section 23. The multiple guide pieces 33 are evenly and symmetrically arranged on both sides of the buffer cavity 31. In the embodiment, six guide pieces 33 are arranged circumferentially on the buffer section 23.

[0042] The septal bladder 34 is fixed on the inner wall of the buffer cavity 31. The septal bladder 34 is configured as an annular bladder. The septal bladder 34 is made of a fiber woven substrate and has a polyurethane sealing coating on its surface. Shear thickening gel is injected into the septal bladder 34. There are four sets of septal bladders in the buffer cavity 31. The four sets of septal bladders are located at four equal parts of the circumference of the buffer cavity. The four sets of septal bladders 34 can be close to each other or far away from each other.

[0043] More specifically, in the initial state, the buffer section 23 is cylindrical. When the infrared sight in this technical solution is accidentally dropped, collided, or subjected to external impact during use, the impact load will be directly transmitted along the structure of the sight body 1 to the eyepiece end 12. The eye-attaching section 21 and the deformable section 22 on the eyepiece cover 2 will be compressed in sequence, and then most of the impact force will act on the buffer section 23 along the axial direction of the eyepiece cover 2. At this time, since the buffer section 23 is embedded with a guide plate 33 and the guide plate 33 is set as an arc-shaped plate, When the guide plate 33 is subjected to force, since the arc plate has an initial curvature in its own width direction, when a load is applied along the length direction, its deformation in the direction of decreasing curvature is mainly achieved by bending, which requires less energy; while the deformation in the direction of increasing curvature is accompanied by in-plane tension in the middle surface of the plate, and the strain energy increases significantly, thus showing obvious directional stiffness differences, causing the structure to deform preferentially in the direction of decreasing curvature. In this embodiment, multiple sets of guide plates 33 are symmetrically arranged on both sides of the buffer cavity 31. Once the buffer section 23 is subjected to an impact load, the guide plates 33 change and bend in a direction away from the buffer cavity 31. When the guide plates 33 are bent under force, they cooperate with the induction grooves 311 on the inner wall of the buffer cavity 31, thereby converting the bending deformation of the guide plates 33 into a radial pushing force on the wall of the buffer section 23, causing the area on the entire buffer section 23 where the buffer cavity 31 is opened to expand radially. At the same time, the four sets of septa 34 set in the buffer cavity 31 are far apart from each other. As the continuous impact load is input to the buffer section 23, the two sets of septa 34 adjacent to each other along the axial direction of the buffer section 23 gradually come into contact and squeeze each other. The shear thickening gel set in the septa 34 increases rapidly due to the rapid increase in local shear rate, and its viscosity rises rapidly, thereby forming an instantaneous high-damping support in the buffer cavity 31. This achieves rapid absorption of impact energy and limits the further rapid compression of the buffer section 23, preventing the user's eye socket from making hard contact with the eyepiece frame 13.

[0044] In addition, the guide plate 33 forces a portion of the buffer section 23 to expand radially, forming a buffer isolation layer between the user's eye socket and the eyepiece frame 13. This not only effectively absorbs the impact load but also effectively increases the contact area of ​​the force acting on the user's eye socket, dispersing the impact load to a wider area around the eye socket rather than concentrating it on the narrow ring at the edge of the eyepiece frame 13, thereby reducing local pressure and minimizing the risk of eye socket contusion.

[0045] The implementation principle of the infrared sight with adaptive protection structure in this application embodiment is as follows: Under normal use, the eyepiece cover 2 is in a low strain working range. The eye-fitting section 21 relies on the compliant deformation of the elastic material to fit the eye socket. The corrugated structure of the deformation section 22 provides axial elastic compensation, so that the eyepiece cover 2 can adapt to the fitting needs of different users. At the same time, the shear thickening gel in the buffer section 23 is in a low viscosity flow state and does not significantly affect the comfort of use.

[0046] When the infrared sight is dropped or subjected to an external impact and the impact load is transmitted along the axial direction of the sight body 1 to the eyepiece end 12, the eye-attached section 21 and the deformation section 22 first undergo compression deformation to achieve primary buffering. Subsequently, the impact force is further applied to the buffer section 23. The arc-shaped guide plate 33 embedded in the buffer section 23 preferentially bends and deforms in the direction of decreasing curvature under the action of axial load. Under the constraint and guidance of the guide groove 311, the axial compression deformation is converted into radial expansion deformation, thereby driving the local area of ​​the buffer section 23 to bulge outward, so that the impact path that was originally concentrated along the axial direction is redistributed into a radially dispersed path.

[0047] At the same time, the partition 34 set in the buffer cavity 31 undergoes relative displacement and compression under the coupling effect of radial expansion and axial compression. The shear thickening gel filled inside undergoes a sudden change in rheological properties due to the rapid increase in local shear rate, quickly changing from a low viscosity state to a high viscosity or even a near-solid state. This forms an instantaneous high-damping support structure in the buffer cavity 31, which rapidly absorbs and dissipates the impact energy and effectively suppresses further compression deformation of the buffer section 23.

[0048] Under the synergistic effect of the aforementioned structure-induced and material-response mechanisms, on the one hand, a buffer layer of a certain thickness is formed between the eyepiece frame 13 and the user's eye socket through radial expansion, preventing rigid contact between the two; on the other hand, by increasing the force-bearing contact area, the impact load originally concentrated at the edge of the eyepiece frame 13 is dispersed to a larger area around the eye socket, thereby significantly reducing local contact pressure. Ultimately, this achieves a transformation from "single elastic buffer" to "multi-level deformation + high damping energy dissipation + force redistribution," significantly improving eye protection under sudden impact conditions while ensuring daily use comfort. The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. An infrared sight with an adaptive protection structure, characterized in that, include: The mirror body (1) is provided with an objective lens end (11) and an eyepiece end (12), and an eyepiece frame (13) is provided on the eyepiece end (12). Eyepiece cover (2), the eyepiece cover (2) is fitted on the eyepiece frame (13), the eyepiece cover (2) is provided with an eye-fitting section (21), a deformable section (22) and a buffer section (23) in sequence along its own length direction, the end of the eye-fitting section (21) away from the deformable section (22) is set in a trumpet shape, the buffer section (23) is provided with an active buffer structure (3), the active buffer structure (3) is used to be triggered when the infrared sight is subjected to external impact and relative displacement occurs towards the user's eye, thereby forming a buffer isolation layer with a certain thickness between the eye-fitting section (21) and the sight body (1) to prevent the eyepiece frame (13) from making rigid contact with the user's eye socket; The active buffer structure (3) includes a closed annular buffer cavity (31) opened in the buffer section (23) and a buffer medium (32) filled in the buffer cavity (31). The buffer section (23) will expand radially during the compression process. At the same time, the buffer medium (32) will increase the equivalent stiffness under the action of high strain rate, thereby realizing impact-responsive support and energy absorption. The active buffer structure (3) also includes a guide piece (33) fixedly embedded on the buffer section (23). The wall thickness of the buffer section (23) is greater than the wall thickness of the eye-attachment section (21). The guide piece (33) is set as an arc-shaped piece. The length direction of the guide piece (33) is parallel to the axial direction of the buffer section (23). Multiple guide pieces (33) are arranged circumferentially on the buffer section (23). Multiple guide pieces (33) are evenly and symmetrically arranged on both sides of the buffer cavity (31). When the guide piece (33) bends under axial pressure, the guide piece (33) can drive the buffer section (23) to expand outward in the radial direction, thereby increasing the contact area of ​​the force and dispersing the impact load originally concentrated on the eyepiece frame (13) to a larger area of ​​the eye socket periphery, thereby significantly reducing the local contact pressure. The buffer cavity (31) is provided with a separator (34), the buffer medium (32) is provided in the separator (34), the buffer medium (32) is provided with a shear thickening gel, the separator (34) is provided with an annular capsule, and four sets of separators (34) are provided in the buffer cavity (31). The four sets of separators (34) are located at four equal parts of the circumference of the buffer cavity (31). When the guide plate (33) drives the buffer section (23) to expand outward along the radial direction, the four sets of separators (34) generate relative displacement between each other and apply shear force to the shear thickening gel, thereby buffering the impact load.

2. An infrared sight with an adaptive protection structure according to claim 1, characterized in that: The buffer section (23) is provided with a guide ring (35) and an abutment ring (36). The guide ring (35) and the abutment ring (36) are coaxially fixedly embedded on the buffer section (23). The guide ring (35) is located at one end of the buffer section (23) near the deformable section (22), and the abutment ring (36) is located at the other end of the buffer section (23). One end of the guide piece (33) abuts against the guide ring (35), and the other end of the guide piece (33) abuts against the abutment ring (36).

3. An infrared sight with an adaptive protection structure according to claim 2, characterized in that: The inner wall of the buffer cavity (31) is provided with an annular guide groove (311). Two sets of guide grooves (311) are provided, and the two sets of guide grooves (311) are symmetrically arranged on the inner walls of the two sides in the height direction of the buffer cavity (31).

4. An infrared sight with an adaptive protection structure according to claim 3, characterized in that: The deformable section (22) is configured as a corrugated tube structure with alternating peaks and valleys. The inner diameter of the end of the deformable section (22) near the buffer section (23) is set as d1, and the inner diameter of the end of the deformable section (22) near the eye patch section (21) is set as d2, where d1 > d2.

5. An infrared sight with an adaptive protection structure according to claim 4, characterized in that: The buffer section (23) is provided with a insertion groove (231) at one end away from the deformation section (22). A snap-fit ​​part (232) is fixed on the inner wall of one side of the insertion groove (231). A snap-fit ​​groove (131) is provided on the eyepiece frame (13). An insertion groove (132) is fixed on the outer wall of one side of the snap-fit ​​groove (131). The insertion groove (132) is inserted into the insertion groove (231). The snap-fit ​​part (232) and the snap-fit ​​groove (131) are snap-fitted together.

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