Gasket and lens assembly

Abstract

This application relates to the field of lens technology and discloses a sealing gasket and a lens assembly. The lens assembly includes a lens barrel, a lens element, and a locking ring. The sealing gasket includes: a sealing body having opposing first and second surfaces along the axial direction of the lens barrel; and multiple elastic protrusions disposed on the second surface and spaced apart circumferentially along the lens barrel. The first surface is used to connect with the locking ring, and the multiple elastic protrusions are all used to elastically press against the lens element; or, the first surface is used to connect with the lens element, and the multiple elastic protrusions are all used to elastically reduce pressure on the locking ring. The sealing gasket in this application, including the sealing body and multiple elastic protrusions, can reduce the friction between the sealing gasket and the lens element or locking ring through the spaced elastic protrusions, preventing the sealing gasket from causing the lens element to rotate during the locking ring's insertion into the lens barrel, thus avoiding impact on the image quality of the lens assembly.

Description

Technical Field

[0001] This application relates to the field of lens technology, and more particularly to a sealing gasket and lens assembly. Background Technology

[0002] Currently, automotive lenses have increasingly higher requirements for image quality, and temperature drift caused by extreme weather conditions can greatly affect the image sharpness of the lens. Therefore, many automotive lenses incorporate elastic sealing gaskets inside to compensate for the effects of temperature drift through their elastic deformation.

[0003] During the installation of the sealing gasket, the lens must first be installed in the lens barrel, then the sealing gasket is placed on the supporting surface of the lens, and then the locking ring is screwed into the lens barrel, pressing against the sealing gasket. However, during the screwing of the locking ring, the elastic sealing gasket is easily rotated by friction, resulting in curling or flipping, which affects the normal function of the sealing gasket.

[0004] In the existing technology, the sealing gasket and the locking ring are fixed together by applying adhesive to solve the problem of the sealing gasket curling or flipping. However, when the locking ring is screwed into the lens barrel, the friction caused by the locking force will be completely transferred to the lens. The sealing gasket will cause the lens to rotate, which will seriously affect the image quality of the lens. Utility Model Content

[0005] This application discloses a sealing gasket that can reduce the friction between the sealing gasket and the lens, making the friction less than the static friction between the sealing gasket and the lens, or reduce the friction between the sealing gasket and the locking ring, making the friction less than the static friction between the sealing gasket and the locking ring, thereby preventing the sealing gasket from causing the lens to rotate during the process of the locking ring being screwed into the lens barrel, which would affect the image quality of the lens.

[0006] To achieve the above objectives, according to a first aspect disclosed in this application, a sealing gasket is provided for use in a lens assembly, the lens assembly including a lens barrel, a lens element, and a locking ring, the sealing gasket including: a sealing body having opposing first and second surfaces along the axial direction of the lens barrel;

[0007] Multiple elastic protrusions are disposed on the second surface and are spaced apart along the circumference of the lens barrel;

[0008] Wherein, the first surface is used to connect with the locking ring, and the plurality of elastic protrusions are all used to elastically press against the lens; or...

[0009] The first surface is used to connect with the lens, and the plurality of elastic protrusions are used to elastically reduce pressure on the locking ring.

[0010] In this way, multiple elastic protrusions arranged at intervals contact the lens. The elastic protrusions are spaced apart, and there is a gap between two adjacent elastic protrusions. This provides more deformation space for the elastic protrusions, making them easier to deform. This allows the sealing gasket to make full use of the elastic force generated by the deformation to counteract the locking force of the locking ring. In this way, the friction between the sealing gasket and the lens or locking ring can be effectively reduced. This prevents the sealing gasket from causing the lens to rotate during the process of the locking ring being screwed into the lens barrel, which would cause the installation angle of the lens to change and thus seriously affect the imaging quality of the lens assembly.

[0011] As an optional implementation, the plurality of elastic protrusions are all strip-shaped structures and extend radially along the lens barrel.

[0012] In this way, the strip structure allows the elastic protrusion to have a certain length, enabling it to effectively and elastically press against the lens, improving the stability of elastic pressure. When subjected to force, the radially extending strip elastic protrusion can more evenly transmit the elastic force to the lens, making the elastic pressure on the lens more uniform and stable. This helps to stabilize the lens in the lens assembly, allowing the sealing gasket to play a good role in sealing, elastic shock absorption, and elastic supplementation for the lens.

[0013] As an optional implementation, the distance from the top of each of the elastic protrusions away from the sealing body to the second surface is the same.

[0014] In this way, the uniform height of each elastic protrusion ensures that the width of the sealing gasket is consistent throughout the lens barrel axial direction. This allows the sealing gasket to exert a uniform elastic pressure on the lens. During gasket installation, the elastic force applied to the lens by each elastic protrusion is more uniform and consistent, avoiding uneven force on the lens caused by inconsistent protrusion heights. This improves the installation accuracy and stability of the lens, ensuring the image quality of the lens assembly. It also provides stable sealing performance. The uniform height of the elastic protrusions ensures a uniform sealing contact between the sealing gasket and the lens, enhancing sealing reliability and effectively preventing problems such as incomplete or excessive sealing caused by individual elastic protrusions being too high or too low, thus improving the overall sealing performance of the lens assembly. Furthermore, it facilitates assembly and adjustment. During assembly, elastic protrusions of the same height are easier to match and contact with the lens, reducing assembly difficulties or the need for additional adjustments that may arise from differences in elastic protrusion height. This improves assembly efficiency and convenience, and reduces production costs. It also helps improve the manufacturing precision and quality stability of the sealing gasket.

[0015] As an optional implementation, each of the elastic protrusions is inclined circumferentially along the lens barrel away from the top of the sealing body, and the direction of inclination is opposite to the screwing direction when the locking ring is installed.

[0016] Thus, the tilting direction of the elastic protrusion allows it to fit more tightly against the lens surface when in contact with the lens, increasing the contact area and improving the sealing effect. Furthermore, when the locking ring is screwed in, the tilted structure of the elastic protrusion can further deform under the pressure of the locking ring, enhancing the sealing performance with the lens and making the seal more reliable. It can also further reduce the impact on the lens. Because the tilting direction of the elastic protrusion is opposite to the screwing direction of the locking ring, the rotational force generated when the locking ring is screwed in is converted into axial pressure on the lens through the tilted surface of the elastic protrusion, rather than a tangential rotational force. This reduces the friction between the elastic protrusion and the lens, thereby reducing the rotational force generated on the lens when the locking ring is screwed in, preventing the lens from shifting or changing its angle due to rotational force, thus protecting the lens mounting accuracy and ensuring the image quality of the lens assembly. Furthermore, the tilted elastic protrusions offer excellent adaptability. This tilted design allows the protrusions to better adapt to the shape and position of the lens when subjected to the pressure of the locking ring being screwed in. Even in cases of slight lens misalignment, the tilted elastic protrusions can compensate through their own elastic deformation, ensuring a tight seal and pressure resistance. Simultaneously, the tilted elastic protrusions provide a guiding effect around the lens barrel, facilitating the positioning and alignment of the sealing gasket during installation, thus improving the convenience and accuracy of assembly.

[0017] As an optional implementation, the elastic protrusion has a third surface and a fourth surface opposite each other along the circumference of the lens barrel, and the fourth surface and the third surface are arranged sequentially along the screwing direction when the locking ring is installed, and the included angle θ between the third surface and the second surface is in the range of 60° to 90°.

[0018] Thus, the design of θ within the range of 60° to 90° enables the elastic protrusion to have better mechanical properties when subjected to force, and can reduce excessive deformation or damage to the elastic protrusion while ensuring the elastic compressive effect.

[0019] As an alternative implementation, the second surface is provided with a groove extending radially along the lens barrel between each pair of adjacent elastic protrusions.

[0020] In this way, each elastic protrusion can deform more freely when subjected to pressure, avoiding uneven elastic force caused by mutual compression between the elastic protrusions. This provides a more uniform elastic force and facilitates the deformation of the elastic protrusions in the circumferential direction of the lens barrel. It further reduces the friction between the sealing gasket and the lens or locking ring, preventing the sealing gasket from rotating the lens during the process of the locking ring being screwed into the lens barrel, which would cause the lens mounting angle to change and thus seriously affect the imaging quality of the lens assembly.

[0021] As an optional implementation, the groove wall is cylindrical, and the groove wall is tangent to the adjacent elastic protrusion along the circumferential side of the lens barrel; or,

[0022] The groove wall is a polygonal prism, and the groove wall and the adjacent elastic protrusion are on the same plane along the circumferential side of the lens barrel. This ensures that when the elastic protrusion deforms under stress, the stress between the elastic protrusion and the sealing body can be evenly distributed, avoiding stress concentration and thus improving the service life and reliability of the sealing gasket.

[0023] In this way, the groove wall and the side of the adjacent elastic protrusion along the circumferential direction of the lens barrel are on the same plane, so that when the elastic protrusion is deformed by force, the stress between the elastic protrusion and the sealing body can be evenly distributed, avoiding stress concentration, thereby improving the service life and reliability of the sealing gasket.

[0024] As an optional implementation, the elastic protrusions are evenly distributed across the entire second surface; or,

[0025] Each of the elastic protrusions is divided into multiple groups, and each group of elastic protrusions is evenly arranged on the entire second surface, and each group of elastic protrusions has multiple elastic protrusions evenly arranged.

[0026] In this way, the evenly distributed elastic protrusions ensure that the elastic force on the lens is uniform and consistent, avoiding uneven force on the lens caused by uneven distribution of elastic protrusions. This improves the installation accuracy and stability of the lens, ensuring the imaging quality of the lens assembly. The grouping of various elastic protrusions simplifies mold design and processing technology to a certain extent, making the production process more efficient. Especially for sealing gaskets with complex shapes, the grouping arrangement can reduce production difficulty, improve production efficiency, and increase product quality consistency.

[0027] As an optional implementation, each of the elastic protrusions has a smooth, arc-shaped convex surface at its top away from the second surface.

[0028] Thus, the design of the curved, convex surface gives the elastic protrusion better mechanical properties under stress, ensuring its elastic pressure-resistant effect while reducing excessive deformation or damage. Furthermore, the smooth, curved surface effectively reduces stress concentration. When the elastic protrusion contacts the lens, the curved surface disperses pressure, preventing damage to the lens or sealing gasket due to excessive localized pressure, thereby extending its service life.

[0029] As an optional implementation, the first surface is provided with an adhesive layer for bonding the sealing body and the locking ring.

[0030] Thus, the adhesive layer can be an adhesive sheet, and the material of the adhesive sheet can be EAA (Ethylene Acrylic Acid Adhesive Sheet), TPE (Thermoplastic Elastomer Adhesive Sheet), etc. In the prior art, when the sealing gasket is attached to the locking ring, a dispensing process is usually used. However, in the embodiments of this application, the adhesive layer can directly bond the sealing gasket to the locking ring, thereby eliminating the dispensing and curing process and improving lens assembly efficiency. Moreover, the adhesive layer can fill the tiny gaps between the sealing body and the locking ring, further enhancing the sealing effect and preventing dust, moisture, and other impurities from entering the lens assembly.

[0031] As an optional implementation, the length H of the elastic protrusion along the axial direction of the lens barrel is 0.25 to 0.75 times the length D of the entire sealing gasket.

[0032] In this way, the elastic protrusion can have a certain length, reducing the friction between it and the lens, but without affecting the overall sealing and elasticity of the gasket.

[0033] According to an embodiment of the second aspect of this application, a lens assembly is provided, including the aforementioned sealing gasket.

[0034] Compared with the prior art, the beneficial effects of this application are:

[0035] The sealing gasket provided in this application embodiment contacts the lens through a plurality of spaced elastic protrusions. Because the elastic protrusions are spaced apart, there is a gap between two adjacent elastic protrusions, which can provide more deformation space for the elastic protrusions, making it easier for the elastic protrusions to deform. This allows the sealing gasket to make full use of the elastic force generated by the deformation to counteract the locking force of the locking ring, thereby effectively reducing the friction between the sealing gasket and the lens or locking ring. This prevents the sealing gasket from causing the lens to rotate during the process of the locking ring being screwed into the lens barrel, which would cause the installation angle of the lens to change and thus seriously affect the imaging quality of the lens assembly. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the lens assembly disclosed in an embodiment of this application;

[0038] Figure 2The embodiments disclosed in this application Figure 1 Enlarged structural diagram at point A;

[0039] Figure 3 This is a front view of the sealing gasket disclosed in the embodiments of this application;

[0040] Figure 4 This is a side view of the sealing gasket disclosed in an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the structure of a portion of the sealing gasket and a portion of the lens disclosed in an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of another part of the sealing gasket and part of the lens disclosed in the embodiments of this application;

[0043] Figure 7 This is a schematic diagram of the structure of another part of the sealing gasket and part of the lens disclosed in the embodiments of this application;

[0044] Figure 8 This is a schematic diagram of the structure of another sealing gasket disclosed in an embodiment of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100-Sealing gasket; 11-Sealing body; 111-First surface; 112-Second surface; 12-Elastic protrusion; 121-Third surface; 122-Fourth surface; 123-Arc-shaped convex surface; 13-Groove; 200-Eye tube; 300-Lens; 400-Locking ring; 500-Filter; a-Axial direction of the eye tube; b-Circumferential direction of the eye tube; c-Radial direction of the eye tube; L-Auxiliary line. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] In this application, the terms "upper," "lower," "top," "bottom," "inner," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0049] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0050] Furthermore, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0051] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0052] Automotive lenses are optical lenses installed on vehicles, mainly including automotive camera lenses and automotive optical lenses. They are widely used in autonomous driving, vehicle networking, and automotive electronic rearview mirrors, and are an indispensable part of modern automobiles.

[0053] Currently, automotive lenses have increasingly higher requirements for image quality, and temperature drift caused by extreme weather conditions can greatly affect the image sharpness of the lens. Therefore, many automotive lenses incorporate elastic gaskets inside. When the lens shifts due to thermal expansion and contraction, the elastic gasket pushes the lens back to its original position, using its elastic deformation to compensate for the effects of temperature drift.

[0054] However, during the installation of the sealing gasket, the lens must first be installed in the lens barrel, then the sealing gasket is placed on the supporting surface of the lens, and finally the locking ring is screwed into the lens barrel, pressing against the sealing gasket. However, during the screwing-in process, the elastic sealing gasket is prone to rotation due to friction, resulting in curling or flipping, affecting its normal function and preventing it from sealing properly and elastically pushing the lens. To prevent the sealing gasket from shifting, it can be fixed to the locking ring with adhesive beforehand, thus resolving the curling or flipping issue.

[0055] However, as optical lenses, lens elements require high installation precision, especially since some elements are assembled into the lens barrel at specific angles to ensure optimal optical performance. While using adhesive to integrate the locking ring and sealing gasket solves the problem of gasket curling, it also transfers the friction caused by the locking force when the locking ring is screwed into the lens barrel entirely to the lens element. This causes the lens element to rotate, severely impacting the lens's image quality.

[0056] Based on this, embodiments of this application provide a sealing gasket that can reduce the friction between the sealing gasket and the lens, making the friction less than the static friction between the sealing gasket and the lens, or reduce the friction between the sealing gasket and the locking ring, making the friction less than the static friction between the sealing gasket and the locking ring, thereby preventing the locking ring from rotating the lens during the process of screwing into the lens barrel, which would affect the imaging quality of the lens assembly.

[0057] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0058] Please see Figure 1 and Figure 3 , Figure 1 This is a schematic diagram of the lens assembly disclosed in an embodiment of this application. Figure 3 This is a schematic diagram of the structure of the sealing gasket 100 disclosed in an embodiment of this application. This application discloses a sealing gasket 100 applied to a lens assembly, which includes a lens barrel 200, a lens element 300, and a locking ring 400. The sealing gasket 100 includes a sealing body 11 and a plurality of elastic protrusions 12. The sealing body 11 has opposing first surfaces 111 and second surfaces 112 along the axial direction of the lens barrel. The plurality of elastic protrusions 12 are disposed on the second surface 112 and arranged at intervals along the circumferential direction b of the lens barrel 200. The first surface 111 is used to connect with the locking ring 400, and the plurality of elastic protrusions 12 are all used to elastically press against the lens element 300; or, the first surface 111 is used to connect with the lens element 300, and the plurality of elastic protrusions 12 are all used to elastically press against the locking ring 400.

[0059] Specifically, the lens assembly may include a locking ring 400, a sealing gasket 100, a lens element 300, and a filter 500. The lens element 300, sealing gasket 100, locking ring 400, and filter 500 may be sequentially arranged in the lens barrel 200 along the axial direction a. The filter 500 is installed on the side of the locking ring 400 facing away from the lens element 300, and may be embedded in the locking ring 400. The sealing gasket 100 may be installed on the side of the locking ring 400 near the lens element 300, and may be connected to the first surface 111 of the sealing body 11 with the locking ring 400, specifically by adhesive bonding. The locking ring 400 is screwed onto the inner wall of the lens barrel 200, and the screwing direction of the locking ring 400 may be clockwise or counterclockwise, without limitation. During the process of the locking ring 400 being rotated into the lens barrel 200, the sealing gasket 100 is attached to the locking ring 400 and will rotate together with the locking ring 400. This can prevent the sealing gasket 100 from shifting during the process of the locking ring 400 rotating and pressing the sealing gasket 100 and the lens 300, which would cause the sealing gasket 100 to curl or bend.

[0060] The sealing gasket 100 is positioned between the lens element 300 and the locking ring 400, serving to seal, buffer, absorb shock, and provide elastic compensation. The sealing gasket 100 prevents dust, moisture, oil, and other impurities from entering the lens, protecting the lens element 300 and avoiding image quality degradation and lens malfunctions caused by impurities adhering to or corroding it. This extends the lens's lifespan and ensures its stability and reliability in various environments. During lens installation and use, it may be affected by external forces such as vibration and impact. The elasticity of the sealing gasket 100 buffers and absorbs shocks, reducing the impact of external forces on the lens assembly, protecting components such as the lens element 300 from damage, and maintaining the integrity of the lens's optical performance and mechanical structure. Furthermore, with temperature changes, components such as the lens element 300 in the lens assembly undergo thermal expansion and contraction, leading to positional shifts and temperature drift. The elasticity of the sealing gasket 100 compensates for this displacement, pushing the lens element 300 back to its original position, mitigating the impact of temperature drift on image sharpness, and ensuring the stability of the lens's image quality.

[0061] The sealing gasket 100 can be annular, and its shape is adapted to the locking ring 400 so that the sealing gasket 100 can perform a sealing function while avoiding obstruction of the lens 300. The shape of the sealing gasket 100 does not have to be strictly annular; it can have cuts at its edge to provide positioning or other functions, as long as it can adhere to the locking ring 400 and perform a sealing function.

[0062] The sealing gasket 100 can be made of materials such as silicone rubber, nitrile rubber or fluororubber, so that the sealing gasket 100 can have good elasticity and temperature resistance, maintain stable performance over a wide temperature range, and ensure sealing, dustproof and waterproof.

[0063] The sealing body 11 and the elastic protrusions 12 can be integrally injection molded, or the end face of the sealing gasket 100 can be grooved to form multiple elastic protrusions 12 and a sealing body 11 without grooves. This can integrate the elastic protrusions 12 with the sealing body 11, ensuring the connection strength between the elastic protrusions 12 and the sealing body 11 and improving the service life of the entire sealing gasket 100.

[0064] There are multiple elastic protrusions 12, all of which are disposed on the second surface 112 of the sealing body 11 and are spaced apart along the circumferential direction b of the lens barrel 200. The spaced elastic protrusions 12 create gaps between them. When the locking ring 400 and the sealing gasket 100 are installed, the locking ring 400 drives the sealing gasket 100 to rotate and press against the lens 300. During the process of rotating and pressing against the lens 300, each elastic protrusion 12 can undergo a certain deformation through the gaps between them, reducing the friction between the sealing gasket 100 and the lens 300 or the locking ring. The friction between the locking ring 400 and the lens barrel 200 prevents the lens 300 from being rotated by the sealing gasket 100 during the rotational installation process, thus avoiding a change in the original installation angle of the lens 300. As an optical lens, the lens 300 has high requirements for installation precision. In particular, some lenses 300 are assembled into the lens barrel 200 at a specific angle to ensure optimal optical performance. This prevents the friction caused by the locking force when the locking ring 400 is screwed into the lens barrel 200 from being completely transferred to the lens 300, thus avoiding rotation of the lens 300 and preventing the installation operation from affecting the image quality of the lens.

[0065] It is worth noting that the sealing gasket 100 can be made by bonding the first surface 111 to the locking ring 400, and then having the elastic protrusion 12 abutting against the lens 300. The elastic protrusion 12 reduces the friction between the sealing gasket 100 and the lens 300 or the locking ring 400, making the friction less than the static friction between the sealing gasket 100 and the lens 300. This prevents the sealing gasket 100 from causing the lens 300 to rotate during the process of the locking ring 400 being screwed into the lens barrel 200, thus affecting the image quality of the lens. Alternatively, the first surface 111 can be bonded to the lens 300, and the elastic protrusion abutting against the locking ring 400. The elastic protrusion 12 reduces the friction between the sealing gasket 100 and the locking ring 400, making the friction less than the static friction between the sealing gasket 100 and the locking ring 400. This prevents the sealing gasket 100 from causing the lens 300 to rotate during the process of the locking ring 400 being screwed into the lens barrel 200, thus affecting the image quality of the lens.

[0066] According to the embodiment of this utility model, the sealing gasket 100 contacts the lens 300 through a plurality of spaced elastic protrusions 12. Since the elastic protrusions 12 are spaced apart, there is a gap between two adjacent elastic protrusions 12, which can provide more deformation space for the elastic protrusions 12, making it easier for the elastic protrusions 12 to deform. This allows the sealing gasket 100 to make full use of the elastic force generated by the deformation to counteract the locking force of the locking ring 400, thereby effectively reducing the friction between the sealing gasket 100 and the lens 300 or the locking ring 400. This prevents the sealing gasket 100 from causing the lens 300 to rotate during the process of the locking ring 400 being screwed into the lens barrel 200, which would cause the installation angle of the lens 300 to change, thus seriously affecting the imaging quality of the lens assembly.

[0067] Combination Figure 3 and Figure 4 , Figure 4 This is a schematic diagram of the sealing gasket 100 from another angle, as disclosed in an embodiment of this application. In some embodiments, the plurality of elastic protrusions 12 are all strip-shaped structures and extend radially c along the lens barrel 200.

[0068] Specifically, during the rotation of the sealing gasket 100 with the locking ring 400, a frictional force extending circumferentially along the lens 300 is generated between the sealing gasket 100 and the lens 300. While the elastic protrusions 12 are spaced apart circumferentially, they also extend radially along the lens barrel 200, forming a gap extending radially along the lens barrel 200 between every two adjacent elastic protrusions 12. Through the gap extending radially along the lens barrel 200, each elastic protrusion 12 can be provided with deformation space circumferentially along the lens barrel 200, thereby effectively reducing the frictional force between the sealing gasket 100 and the lens 300 or the locking ring 400. This prevents the sealing gasket 100 from causing the lens 300 to rotate during the process of the locking ring 400 being screwed into the lens barrel 200, which would cause the installation angle of the lens 300 to change and thus seriously affect the imaging quality of the lens assembly. Furthermore, the strip structure allows the elastic protrusion 12 to have a certain length, enabling the elastic protrusion 12 to effectively elastically press against the lens 300, improving the stability of elastic pressing. When subjected to force, the strip-shaped elastic protrusion 12 extending radially c along the lens barrel 200 can more evenly transmit the elastic force to the lens 300, making the elastic pressing force on the lens 300 more uniform and stable. This helps to stabilize the lens 300 in the lens assembly, allowing the sealing gasket 100 to play a good role in sealing, elastic shock absorption, and elastic supplementation for the lens 300.

[0069] Combination Figure 4 In some embodiments, the distance from the top of each elastic protrusion 12 away from the sealing body 11 to the second surface 112 is the same.

[0070] Specifically, the distance from the top of the elastic protrusion 12 facing away from the sealing body 11 to the second surface 112 is the height of the elastic protrusion 12. Since all elastic protrusions 12 have the same height, the width of the sealing gasket 100 is the same throughout the axial direction of the lens barrel 200. This allows the sealing gasket 100 to exert a uniform elastic pressure on the lens 300. When installing the sealing gasket 100, the elastic force applied to the lens 300 by each elastic protrusion 12 is more uniform, avoiding uneven force on the lens 300 caused by inconsistent heights of the elastic protrusions 12. This improves the installation accuracy and stability of the lens 300, ensuring the imaging quality of the lens assembly. It also provides stable sealing performance. The uniform height of the elastic protrusions 12 ensures a uniform sealing contact between the sealing gasket 100 and the lens 300, enhancing the reliability of the seal and effectively preventing problems such as inadequate or excessive sealing caused by individual elastic protrusions 12 being too high or too low, thus improving the overall sealing performance of the lens assembly. Furthermore, it facilitates assembly and adjustment. During assembly, the elastic protrusions 12 of the same height are more likely to match and contact the lens 300, reducing assembly difficulties or the need for additional adjustments that may arise due to differences in the height of the elastic protrusions 12. This improves assembly efficiency and convenience, and reduces production costs. It also helps to improve the manufacturing precision and quality stability of the sealing gasket 100.

[0071] Combination Figure 5 , Figure 5 This is a schematic diagram of the mating structure between a sealing gasket and a lens as disclosed in an embodiment of this application. In some embodiments, each elastic protrusion 12 is inclined along the circumferential direction b of the lens barrel 200 away from the top of the sealing body 11, and the direction of inclination is opposite to the screwing direction of the locking ring 400 during installation.

[0072] Specifically, the elastic protrusions 12 are inclined, meaning that the elastic protrusions 12 are inclined relative to the second surface 112, rather than perpendicular to it. The direction of the inclination of the elastic protrusions 12 is the direction in which the top of the elastic protrusions 12 is offset relative to the bottom of the elastic protrusions 12. The elastic protrusions 12 are arranged at intervals along the circumference b of the lens barrel 200, such that the top of each elastic protrusion 12 is offset clockwise relative to the bottom of the elastic protrusions 12 along the circumference b of the lens barrel 200. In other words, the inclination direction of the elastic protrusions 12 is clockwise, which allows the top of each elastic protrusion 12 to be offset relative to the bottom of the elastic protrusions 12 in a clockwise direction. The bottom of the elastic protrusion 12 is offset counterclockwise along the circumferential direction b of the lens barrel 200, that is, the tilt direction of the elastic protrusion 12 is counterclockwise. When the locking ring 400 is installed, it can be rotated clockwise or counterclockwise. The tilt direction of the elastic protrusion 12 is opposite to the rotation direction of the locking ring 400 during installation. That is, when the locking ring 400 is rotated clockwise, the tilt direction of the elastic protrusion 12 is counterclockwise along the axial direction a of the lens barrel 200. When the locking ring 400 is rotated counterclockwise, the tilt direction of the elastic protrusion 12 is clockwise along the axial direction a of the lens barrel 200.

[0073] The tilting direction of the elastic protrusion 12 allows it to fit more tightly against the surface of the lens 300 when in contact with it, increasing the contact area and improving the sealing effect. Furthermore, when the locking ring 400 is screwed in, the tilted structure of the elastic protrusion 12 can further deform under the pressure of the locking ring 400, enhancing the sealing performance with the lens 300 and making the seal more reliable. It also further reduces the impact on the lens 300. Because the tilting direction of the elastic protrusion 12 is opposite to the screwing direction of the locking ring 400, the rotational force generated when the locking ring 400 is screwed in is converted into axial pressure on the lens 300 through the tilted surface of the elastic protrusion 12, rather than a tangential rotational force. This reduces the friction between the elastic protrusion 12 and the lens 300, thereby reducing the rotational force generated on the lens 300 when the locking ring 400 is screwed in. This prevents the lens 300 from shifting or changing its angle due to rotational force, thus protecting the installation accuracy of the lens 300 and ensuring the imaging quality of the lens assembly. Furthermore, the tilted elastic protrusion 12 has excellent adaptability. This tilted design allows the elastic protrusion 12 to better adapt to the shape and position of the lens 300 when subjected to the pressure of the locking ring 400 being screwed in. Even if there is a slight displacement of the lens 300, the tilted elastic protrusion 12 can compensate through its own elastic deformation, ensuring sealing and pressure resistance. At the same time, the tilted elastic protrusion 12 provides a certain guiding effect in the circumferential direction of the lens barrel 200, which is beneficial to the positioning and alignment of the sealing gasket 100 during installation, improving the convenience and accuracy of assembly.

[0074] Combination Figure 5In some embodiments, the elastic protrusion 12 has a third surface 121 and a fourth surface 122 opposite to each other along the circumferential direction of the lens barrel 200, and the fourth surface 122 and the third surface 121 are arranged sequentially along the screwing direction when the locking ring 400 is installed, and the included angle θ between the third surface 121 and the second surface 112 is in the range of 60° to 90°.

[0075] Specifically, when the elastic protrusion 12 is inclined along the circumferential direction b of the lens barrel 200, the third surface 121 is closer to the second surface 112 than the fourth surface 122. At this time, the third surface 121 and the second surface 112 form an acute angle θ, such that the included angle θ is as follows: Figure 5 As shown, the fourth surface 122 forms an obtuse angle β with the second surface 112, while the third surface 121 and the fourth surface 122 are positioned opposite each other. When the tilt angle of the third surface 121 changes, the tilt angle of the fourth surface 122 also changes accordingly. When the included angle θ between the third surface 121 and the second surface 112 is set to a range of 60° < θ < 90°, the horizontal component of the force exerted by the elastic protrusion 12 on the lens 300 will be smaller. This can further reduce the friction between the sealing gasket 100 and the lens 300 or the locking ring 400, preventing the sealing gasket 100 from rotating the lens 300 during the process of the locking ring 400 being screwed into the lens barrel 200, which would cause the installation angle of the lens 300 to change, thus seriously affecting the imaging quality of the lens assembly. Moreover, this angle range design gives the elastic protrusion 12 better mechanical properties when subjected to force, ensuring the elastic pressure resistance while reducing excessive deformation or damage to the elastic protrusion 12.

[0076] As shown in the table below, the frictional force f in the table is the frictional force between the sealing gasket 100 and the lens 300 when the elastic protrusion 12 contacts the lens 300 and a pressure of 0.2N is applied to the sealing body 11 from the direction of the sealing body 11 toward the lens 300. The simulation structure without the elastic protrusion 12 is: the existing annular sealing gasket is directly placed on the lens surface. As can be seen from the table, the frictional force f is the largest when the sealing gasket does not have the elastic protrusion 12 proposed in the embodiments of this application, which is 0.11N. When the sealing gasket has the elastic protrusion 12 and the angle θ between the third surface 121 and the second surface 112 is 80°, the frictional force f is the smallest, approaching 0N.

[0077]

[0078] Combination Figure 5 , Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the grooved mating structure of a sealing gasket with a lens, as disclosed in some embodiments of this application. Figure 7This is a schematic diagram of the mating structure of a grooved sealing gasket with a lens, as disclosed in another embodiment of this application. In some embodiments, the second surface 112 is provided with a groove 13 extending radially c along the lens barrel 200 between each pair of adjacent elastic protrusions 12.

[0079] Specifically, Figure 6 The dotted line in the diagram is the auxiliary line L, representing the second surface 112. The opening of the groove 13 is located on the second surface 112. The groove 13 is positioned between the two elastic protrusions 12, allowing the elastic protrusions 12 to have a certain degree of independence. Under pressure, each elastic protrusion 12 can deform more freely, avoiding uneven elastic force caused by mutual compression between the elastic protrusions 12. This provides a more uniform elastic force and facilitates the deformation of the elastic protrusions 12 in the circumferential direction b of the lens barrel 200. It further reduces the friction between the sealing gasket 100 and the lens 300 or the locking ring 400, preventing the sealing gasket 100 from rotating the lens 300 during the screwing of the locking ring 400 into the lens barrel 200, which would cause a change in the installation angle of the lens 300 and seriously affect the imaging quality of the lens assembly. Moreover, this angle range design gives the elastic protrusions 12 better mechanical properties under force, ensuring the elastic pressure resistance while reducing excessive deformation or damage to the elastic protrusions 12.

[0080] Combination Figure 6 In some embodiments, the groove wall of the groove 13 is cylindrical, and the groove wall of the groove 13 is tangent to the side surface of the adjacent elastic protrusion 12 along the circumferential direction of the lens barrel 200; or,

[0081] Combination Figure 7 The groove wall of the groove 13 is a polygonal prism, and the groove wall of the groove 13 and the side surface of the adjacent elastic protrusion 12 along the circumferential direction of the lens barrel 200 are on the same plane.

[0082] Specifically, the groove wall of groove 13 can be a cylindrical surface, that is, the cross-section of groove 13 is an arc shape. Groove 13 is tangent to the side walls of the two adjacent elastic protrusions 12. The groove wall of groove 13 can be a polygonal prism, such as... Figure 5 As shown, the cross-section of the groove 13 is polygonal, and the groove wall of the groove 13 and the side of the adjacent elastic protrusion 12 along the circumferential direction of the lens barrel 200 are on the same plane. This allows the stress between the elastic protrusion 12 and the sealing body 11 to be evenly distributed when the elastic protrusion 12 is deformed by force, avoiding stress concentration, thereby improving the service life and reliability of the sealing gasket 100.

[0083] Combination Figure 3 In some embodiments, the elastic protrusions 12 are evenly distributed over the entire second surface 112; or,

[0084] Combination Figure 8 , Figure 8 This is a schematic diagram of another sealing gasket disclosed in an embodiment of this application. Each elastic protrusion 12 is divided into multiple groups, and each group of elastic protrusions 12 is evenly arranged on the entire second surface 112, and each group of elastic protrusions 12 has multiple elastic protrusions 12 evenly arranged.

[0085] Specifically, the elastic protrusions 12 are arranged at intervals along the circumference b of the lens barrel 200, and can be evenly distributed on the entire second surface 112. The evenly distributed elastic protrusions 12 can ensure that the elastic force on the lens 300 is uniform and consistent, avoiding uneven force on the lens 300 caused by uneven distribution of elastic protrusions 12, thereby improving the installation accuracy and stability of the lens 300 and ensuring the imaging quality of the lens assembly. Alternatively, the elastic protrusions 12 can be divided into multiple groups, with multiple elastic protrusions 12 in each group. The elastic protrusions 12 in each group are separated by a first distance, and the individual elastic protrusions 12 in each group can be separated by a second distance, where the first distance is greater than the second distance. The group arrangement simplifies the mold design and processing technology to a certain extent, making the production process more efficient. Especially for the sealing gasket 100 with complex shapes, the group arrangement can reduce the production difficulty, improve production efficiency and product quality consistency.

[0086] Combination Figure 5 In some embodiments, each elastic protrusion 12 has a smooth, arc-shaped convex surface 123 on its top away from the second surface 112.

[0087] Specifically, the smooth, curved convex surface 123 prevents the elastic protrusion 12 from scratching the lens 300. It also further reduces friction between the sealing gasket 100 and the lens 300 or locking ring 400, preventing the sealing gasket 100 from rotating the lens 300 during the locking ring 400's insertion into the lens barrel 200. This prevents changes in the lens 300's mounting angle, which could severely affect the image quality of the lens assembly. Furthermore, the curved convex surface 123 provides better mechanical properties for the elastic protrusion 12 under stress, ensuring effective elastic resistance while minimizing excessive deformation or damage. The smooth, curved surface also effectively reduces stress concentration. When the elastic protrusion 12 contacts the lens 300, the curved surface disperses pressure, preventing damage to the lens 300 or sealing gasket 100 due to excessive localized pressure, thus extending its service life.

[0088] In some embodiments, the first surface 111 is provided with an adhesive layer for bonding the sealing body 11 and the locking ring 400.

[0089] Specifically, the adhesive layer can be an adhesive sheet, and the material of the adhesive sheet can be EAA (Ethylene Acrylic Acid Adhesive Sheet), TPE (Thermoplastic Elastomer Adhesive Sheet), etc. In the prior art, when the sealing gasket 100 is attached to the locking ring 400, a dispensing process is usually used. However, in this embodiment, the adhesive layer can directly bond the sealing gasket 100 to the locking ring 400, thereby eliminating the dispensing and curing process and improving lens assembly efficiency. Moreover, the adhesive layer can fill the tiny gaps between the sealing body 11 and the locking ring 400, further enhancing the sealing effect and preventing dust, moisture, and other impurities from entering the lens assembly.

[0090] Combination Figure 4 In some embodiments, along the axial direction a of the lens barrel, the length H of the elastic protrusion 12 is 0.25 to 0.75 times the length D of the entire sealing gasket.

[0091] Specifically, such as Figure 4 As shown, the length D of the sealing gasket can also be said to be the thickness of the entire sealing gasket. The length H of the elastic protrusion 12 is the dimension length along the axial direction a of the lens barrel. The value range of H is 0.25 to 0.75D, which can give the elastic protrusion 12 a certain length, reduce the friction between it and the lens 300, but will not affect the sealing and elasticity of the overall sealing gasket.

[0092] In some embodiments, the elastic protrusion 12 of the sealing gasket 100 presses against the lens 300 with an elastic force ranging from 0.5N to 1N.

[0093] Specifically, in this embodiment, after the sealing gasket 100 is provided with the sealing body 11 and the elastic protrusion 12, the width of the sealing gasket 100 along the axial direction a of the lens barrel 200 remains unchanged, the pressure of the locking ring 400 on the sealing gasket 100, and the pressure of the sealing gasket 100 on the lens 300 remain unchanged. The elastic force range of 0.5N to 1N ensures that the elastic protrusion 12 provides sufficient resistance to the lens 300, keeping the lens 300 in a stable position within the lens assembly and preventing displacement or shaking of the lens 300 due to external forces (such as vibration, impact, etc.). The elastic force within this range can effectively counteract the displacement of the lens 300 caused by thermal expansion and contraction during temperature changes, ensuring that the lens 300 is always in the optimal working position and improving the imaging quality of the lens assembly. In addition, the elastic force range of 0.5N to 1N is moderate, providing sufficient resistance without applying excessive pressure to the lens 300, avoiding deformation or damage to the lens 300 due to uneven stress caused by excessive elastic force. It also ensures a tight contact between the elastic protrusion 12 and the lens 300, forming a good seal and preventing dust, moisture, and other impurities from entering the lens assembly. Moreover, this elastic range ensures that the elastic protrusion 12 maintains good elasticity during long-term use and will not fail prematurely due to excessive or insufficient elasticity, thereby extending the service life of the sealing gasket 100.

[0094] Please see Figure 1 and Figure 2 , Figure 2 The embodiments disclosed in this application Figure 1 A magnified structural diagram at point A. This application discloses a lens assembly, including the aforementioned sealing gasket 100.

[0095] Specifically, the lens assembly may include a locking ring 400, a sealing gasket 100, a lens element 300, and a filter 500. The lens element 300, sealing gasket 100, locking ring 400, and filter 500 may be sequentially arranged in the lens barrel 200 along the axial direction a. The filter 500 is installed on the side of the locking ring 400 facing away from the lens element 300, and may be embedded in the locking ring 400. The sealing gasket 100 may be installed on the side of the locking ring 400 near the lens element 300. The first surface 111 of the sealing body 11 may be connected to the locking ring 400, specifically by adhesive bonding. The locking ring 400 is screwed onto the inner wall of the lens barrel 200. During the process of screwing the locking ring 400 into the lens barrel 200, the sealing gasket 100, which is attached to the locking ring 400, will rotate together with the locking ring 400. Moreover, in this embodiment, the sealing gasket 100 contacts and presses against the lens 300 through multiple elastic protrusions 12, so that the sealing gasket 100 can play the role of sealing and pressing the lens 300, while avoiding the generation of large friction between the sealing gasket 100 and the lens 300 during the rotation installation process. This prevents the friction caused by the locking force when the locking ring 400 is screwed into the lens barrel 200 from being completely transferred to the lens 300, causing the sealing gasket 100 to drive the lens 300 to rotate. This avoids the installation operation of the sealing gasket 100 and the locking ring 400 from affecting the angle setting of the lens 300 and affecting the imaging quality of the lens assembly.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A seal gasket applied to a lens assembly, the lens assembly comprising a lens barrel (200), a lens (300) and a locking ring (400), characterized in that, The sealing gasket includes: A sealing body (11) having opposing first surfaces (111) and second surfaces (112) along the axial direction (a) of the lens barrel; Multiple elastic protrusions (12) are disposed on the second surface (112) and are spaced apart along the circumferential (b) direction of the lens barrel (200); Wherein, the first surface (111) is used to connect with the locking ring (400), and the plurality of elastic protrusions (12) are all used to elastically press against the lens (300); or, The first surface (111) is used to connect with the lens (300), and the plurality of elastic protrusions (12) are used to elastically depress the locking ring (400).

2. The sealing gasket according to claim 1, characterized in that, The plurality of elastic protrusions (12) are all strip-shaped structures and extend radially (c) along the lens barrel (200).

3. The sealing gasket according to claim 1, characterized in that, The distance from the top of each of the elastic protrusions (12) facing away from the sealing body (11) to the second surface (112) is the same.

4. The sealing gasket according to claim 1, characterized in that, Each of the elastic protrusions (12) is inclined along the circumferential direction (b) of the lens barrel (200) away from the top of the sealing body (11), and the direction of inclination is opposite to the screwing direction of the locking ring (400) during installation; The elastic protrusion (12) intersects the third surface (121) along the circumferential direction (b) of the lens barrel (200), and the angle θ between the third surface (121) and the second surface (112) ranges from 60° to 90°.

5. The sealing gasket according to claim 1, characterized in that, The second surface (112) is provided with a groove (13) extending radially (c) along the lens barrel (200) between each two adjacent elastic protrusions (12); Wherein, the groove wall of the groove (13) is cylindrical, and the groove wall of the groove (13) is tangent to the adjacent elastic protrusion (12) along the circumferential side of the lens barrel (200); or, The groove wall of the groove (13) is a polygonal prism, and the groove wall of the groove (13) and the side surface of the adjacent elastic protrusion (12) along the circumferential direction of the lens barrel (200) are on the same plane.

6. The sealing gasket according to claim 1, characterized in that, Each of the elastic protrusions (12) is evenly distributed over the entire second surface (112); or, Each of the elastic protrusions (12) is divided into multiple groups, and each group of elastic protrusions (12) is evenly arranged on the entire second surface (112), and each group of elastic protrusions (12) is evenly arranged with multiple elastic protrusions (12).

7. The sealing gasket according to claim 1, characterized in that, Each of the elastic protrusions (12) has a smooth arc-shaped convex surface (123) at the top away from the second surface (112).

8. The sealing gasket according to claim 1, characterized in that, The first surface (111) is provided with an adhesive layer for bonding the sealing body (11) and the locking ring (400).

9. The sealing gasket according to claim 1, characterized in that, Along the axial direction (a) of the lens barrel, the length H of the elastic protrusion (12) is 0.25 to 0.75 times the length D of the entire sealing gasket.

10. A lens assembly, characterized by, include: The sealing gasket (100) as described in any one of claims 1-9.

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