Lens barrel, lens assembly, camera module, and terminal device

Abstract

The present application relates to the technical field of photography, and in particular to a lens barrel, a lens assembly, a camera module, and a terminal device. The lens barrel comprises an inner wall and an outer wall, and the inner wall is used for mounting a lens group. The inner wall comprises at least one first annular mounting surface, and the first annular mounting surface is used for mounting a trimmed lens in the lens group. Each first annular mounting surface comprises a plurality of first curved surfaces and a plurality of first flat surfaces which are alternately connected around the optical axis of the lens group, and each first curved surface is used for abutting against the corner arc of the trimmed lens in the circumferential direction. The outer wall comprises at least one first surface, and the first surface comprises a plurality of second curved surfaces and a plurality of second flat surfaces which are alternately connected around the optical axis of lenses. Along the direction perpendicular to the optical axis of the lens group, the projection of any first annular mounting surface on the outer wall of the lens barrel is located on the first surface, such that a trimmed inner wall is matched with a trimmed outer wall, so that the lens barrel has more uniform shrinkage in manufacturing and the roundness of the lens barrel is ensured.

Description

Lens barrel, lens assembly, camera module and terminal equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on December 18, 2023, with application number 202311744878.1, titled "Lens barrel, lens assembly, camera module and terminal device", the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on June 14, 2024, with application number 202410777396.4, titled "Lens barrel, lens assembly, camera module and terminal device", and the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on December 2, 2024, with application number 202411761096.3, titled "Lens barrel, lens assembly, camera module and terminal device", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of camera technology, and in particular to a lens barrel, a lens assembly, a camera module and a terminal device. Background Art

[0004] As camera modules in terminal devices pursue high image quality and high resolution, the optical structure of the camera module lens has become more complex, and its size has also increased, which in turn limits the trend of lightweight terminal devices. Based on this, the prior art proposes a trimmed lens structure, that is, a circular lens combined with a trimmed polygonal lens barrel, to reduce the size and weight of the camera module. During the manufacturing process of this camera module, the trimmed polygonal lens barrel and the circular lens are manufactured through an injection molding process. During the injection molding process, the lens barrel and lens shrink unevenly, which can easily lead to significant variations in the curvature of the inner arc of the lens barrel and the outer arc of the lens. This leads to excessive lens assembly stress, resulting in large structural tolerances, and also relatively large coaxial errors between different lenses. Summary of the Invention

[0005] The present application provides a lens barrel, a lens assembly, a camera module and a terminal device, wherein the lens barrel reduces the volume of the lens while ensuring the assembly coaxiality of the lens barrel when assembling a trimmed lens.

[0006] In a first aspect, the present application provides a lens barrel that can be used in a camera module. The lens barrel includes an inner wall and an outer wall, and the inner wall is used to mount a lens group. The inner wall includes at least one first annular mounting surface, and the first annular mounting surface is used to mount a trimmed lens in the lens group. Each first annular mounting surface includes a plurality of first curved surfaces and a plurality of first cut surfaces alternately connected in the direction of the optical axis of the lens group, and each first curved surface is used to circumferentially abut the corner arc of the trimmed lens. The distance between any one of the first curved surfaces and the optical axis of the lens group is not less than the distance between any one of the first cut surfaces and the optical axis. The outer wall includes at least one first surface, and the first surface includes a plurality of second curved surfaces and a plurality of second cut surfaces alternately connected in the direction of the optical axis of the lens. The distance between any one of the second curved surfaces and the optical axis of the lens group is not less than the distance between any one of the second cut surfaces and the optical axis of the lens group. Along the direction perpendicular to the optical axis of the lens group, the projection of any first annular mounting surface on the outer wall of the lens barrel is located on the first surface, the first arc surface corresponds to the second arc surface, and the first tangent surface corresponds to the second tangent surface, so that the inner wall of the cut edge and the outer wall of the cut edge are matched, so that the lens barrel has more uniform shrinkage during manufacturing and the roundness of the lens barrel is ensured.

[0007] The lens barrel is designed with a trimmed inner wall structure to accommodate trimmed lenses, and a trimmed outer wall structure that matches the trimmed inner wall structure. This reduces the barrel's volume while ensuring the required roundness during manufacturing. When the lens assembly is assembled into the barrel, the coaxiality between the multiple lenses is guaranteed, and the assembly stress between the lenses and the barrel is reduced, ensuring the reliability of the lens assembly.

[0008] In one possible implementation, the first curved surface includes a first protrusion convex toward the optical axis of the lens assembly. Each first protrusion has a first abutment portion for abutting against the vertex arc of the trimmed lens. Along a direction perpendicular to the optical axis of the lens, each first abutment portion is equidistant from the optical axis to ensure coaxiality of the trimmed lens after mounting on the first annular mounting surface.

[0009] In one possible implementation, the inner wall further includes at least one second annular mounting surface, located on a side of the at least one first annular mounting surface closer to the object side. The second annular mounting surfaces are used for circumferentially mounting the circular lenses in the lens assembly, with each second annular mounting surface being rotationally symmetric about the optical axis of the lens. The outer wall includes a second surface rotationally symmetric along the optical axis of the lens assembly, with the projection of the at least one second annular mounting surface onto the outer wall of the lens barrel being located on the first surface in a direction perpendicular to the optical axis of the lens.

[0010] In one possible implementation, each second annular mounting surface includes three second protrusions, each having a second abutment portion for abutting the outer circumference of the circular lens. Each second abutment portion is equidistant from the optical axis in a direction perpendicular to the lens' optical axis. When the circular lens is mounted on the second annular mounting surface, the three second protrusions abut against the circumferential edges of the circular lens, securing the circular circumference. The three second protrusions can also ensure coaxiality between the mounted circular lens and the optical axis.

[0011] In one possible implementation, along a direction perpendicular to the optical axis of the lens group, the central axis of at least one of the second protrusions is collinear with the central axis of one of the first cut surfaces, thereby facilitating the manufacture of the lens barrel.

[0012] The first abutting portion and the trimmed lens are in point contact or surface contact; and / or the second abutting portion and the circular lens are in point contact or surface contact.

[0013] In one possible implementation, the inner wall includes a first bearing surface. The first bearing surface is located at an end of the inner wall near the object side along the optical axis of the lens assembly. The first bearing surface is configured to axially abut against a first lens of the lens assembly near the object side, thereby limiting the position of the end surface of the lens assembly facing the object side along the optical axis.

[0014] In one possible implementation, the inner wall includes a second bearing surface. Along the optical axis of the lens assembly, the second bearing surface is located on the image-side side of the first bearing surface. The second bearing surface is configured to axially abut the object-facing surface of a lens in the lens assembly. The second bearing surface can limit the object-facing end surfaces of a portion of the lenses along the optical axis.

[0015] In one possible implementation, along the optical axis of the lens group, the inner wall includes an end section located at the object-side end of the lens barrel, and the end section is arranged at intervals from the first section; along the radial direction of the lens barrel, the distance between each end section and the second section ranges from 0.2 mm to 2 mm, which can ensure the strength of the lens barrel while making the outer surface of the lens barrel have a smaller size.

[0016] In a second aspect, the present application provides a lens assembly, which includes a lens group and any one of the lens barrels provided in the first aspect. The lens group includes at least one trimmed lens, and each trimmed lens is correspondingly assembled on a first annular mounting surface. Between the mutually matching trimmed lens and the first annular mounting surface, the trimmed lens includes a plurality of corner arcs, and the plurality of corner arcs abut against a plurality of first arc surfaces of the first annular mounting surface in a one-to-one correspondence. The first arc surfaces of the first annular mounting surface can achieve circumferential fixation of the trimmed lens. The trimmed lens barrel and the trimmed lens included in the lens assembly can reduce the volume of the lens assembly while ensuring the assembly coaxiality of the lens barrel when assembling the trimmed lens.

[0017] In one possible implementation, the inner wall of the lens barrel further includes at least one second annular mounting surface, the at least one second annular mounting surface being located on a side of the at least one first annular mounting surface closer to the object side. The lens assembly includes at least one circular lens, each circular lens being mounted on a corresponding first annular mounting surface.

[0018] In one possible implementation, the shape of the trimmed lens does not match the shape of the circular lens, and the surface of the trimmed lens adjacent to the at least one circular lens facing the object side abuts against the inner wall of the lens barrel to ensure installation stability.

[0019] In one possible implementation, each edge-cut lens is an injection-molded body, and an injection-molding gate of each edge-cut lens is located at a circumferential edge of the edge-cut lens.

[0020] In one possible implementation, the injection molding gate of at least one trimmed lens is located at one of the corner arcs; along the circumference of the trimmed lens, the circumferential size of the injection molding gate is smaller than the circumferential size of the corner arc to ensure that when the gate structure at the injection molding gate position is cut off, it does not affect the assembly of the corner arc of the trimmed lens and the first annular mounting surface of the lens barrel.

[0021] In one possible implementation, at least one corner arc of at least one trimmed lens includes a side cut surface. Along the circumference of the trimmed lens, the circumferential dimension of the side cut surface is smaller than the circumferential dimension of the corner arc, thereby not affecting the assembly of the corner arc of the trimmed lens with the first annular mounting surface of the lens barrel. The addition of the side cut surface increases the number of facets of the trimmed lens, potentially further optimizing the size of the lens barrel.

[0022] In one possible implementation, along the circumference of the trimmed lens, the corner arc includes a first sub-arc surface and a second sub-arc surface, with the first sub-arc surface and the second sub-arc surface respectively located on either side of the side cut surface. The first sub-arc surface and the second sub-arc surface can increase the cut surface, which is conducive to further reducing the size of the lens barrel.

[0023] In one possible implementation, the lens assembly includes a first pressure ring for securing to the inner wall of the lens barrel. Along the optical axis of the lens assembly, the first pressure ring is secured to the inner wall of the lens barrel and abuts against the image-facing surface of the trimmed lens assembly. The first pressure ring can positionally secure the lens assembly on the image-facing surface of the lens assembly.

[0024] Along the optical axis of the lens assembly, the first pressure ring is provided with multiple reinforcements on the side facing the trimmed lens assembly, each corresponding to one of the multiple first curved surfaces. The first pressure ring includes an arched portion located between any two adjacent reinforcements, with the arched portion convex toward the object side. When the lens assembly is impacted or shaken, the force exerted by the lens barrel on the first pressure ring is absorbed by the deformation of the arched portion. This deformation, in turn, acts as a pre-tightening and securing mechanism for the trimmed lens through the reinforcements, protecting the trimmed lens from impact or shaking.

[0025] In one possible implementation, the inner wall of the lens barrel includes a first bearing surface. Along the optical axis of the lens assembly, the object-facing surface of a first lens in the lens assembly, which is closest to the object side, abuts against the first bearing surface. The first bearing surface can limit and secure the lens assembly at the object-facing surface of the lens assembly.

[0026] In one possible implementation, the inner wall of the lens barrel includes a second bearing surface, and the second bearing surface is located between the first bearing surface and the first pressure ring. The lens group includes a second pressure ring for being fixed to the inner wall of the lens barrel, and the second pressure ring is located between the first bearing surface and the second bearing surface. Along the optical axis direction of the lens group, the lens group includes a first lens group and a second lens, and the first lens group is located on the side of the second lens group facing the object side. The surface of the first lens group facing the object side abuts against the first bearing surface, and the surface of the first lens group facing the image side abuts against the second pressure ring. The first bearing surface and the second pressure ring can limit and fix the first lens group along the optical axis. The surface of the second lens group facing the object side abuts against the second bearing surface, and the surface of the second lens group facing the image side abuts against the first pressure ring. The first pressure ring and the second bearing surface can limit and fix the second lens group along the optical axis.

[0027] In one possible implementation, the first lens group includes multiple lenses, with any two adjacent lenses abutting along the optical axis of the lens group; and / or the second lens group includes multiple lenses, with any two adjacent lenses abutting along the optical axis of the lens group. This arrangement reduces contact between the lenses and the lens barrel, which helps improve the coaxiality between the multiple lenses.

[0028] In one possible implementation, the first pressure ring is secured to the inner wall of the lens assembly via a first connector, and the second pressure ring is secured to the inner wall of the lens assembly via a second connector. At least one of the first connector and the second connector is an adhesive, a screw, a bolt, or a weld. This combination of the lens assembly and lens barrel provides greater stability and reliability, and also improves the optical performance of the lens assembly.

[0029] In one possible implementation, each trimmed lens includes an optical lens portion and an edge portion surrounding the optical lens portion; along the radial direction of the trimmed lens, the distance between the edge of the optical lens portion and the optical axis of the lens group is greater than 0.8 times the distance between the trimmed edge of the trimmed lens and the optical axis of the lens group, so that the trimmed lens can perform a good light adjustment function.

[0030] In one possible implementation, along the radial direction of the trimmed lens, the distance between the optical trim and the edge of the optical lens portion is greater than 0.03 mm, thereby ensuring the dimensional accuracy of the optical lens portion of the trimmed lens.

[0031] In one possible implementation, the inner wall of the lens barrel also includes at least one circular third annular mounting surface, with any one of the third annular mounting surfaces located on the object-side of at least one first annular mounting surface. The lens group includes at least one quasi-circular lens, each of which has a circumferential edge including at least three lens protrusions, each having an arcuate surface for abutting the third annular mounting surface. Along the radial direction of the lens barrel, the radius of the arcuate surface of each lens protrusion is equal. When the quasi-circular lens is mounted on the third annular mounting surface, the arcuate surface of each lens protrusion abuts the third annular mounting surface. The position of the quasi-circular lens squeezed by the third annular mounting surface is controllable, thereby controlling the deformation of the lens. Designing the structure and distribution of the lens protrusions can improve the optical performance of the quasi-circular lens.

[0032] In one possible implementation, along the circumference of the quasi-circular lens, the central angle of any lens protrusion ranges from 10° to 60°.

[0033] Along the circumference of the quasi-circular lens, the central angles corresponding to the at least three lens protrusions range from 30° to 180°.

[0034] In a third aspect, the present application provides a camera module comprising an image sensor and the lens assembly provided in the second aspect above, wherein the image sensor is disposed on the image side of the trimmed lens assembly. Light from the object side can pass through the lens assembly and be projected onto the image sensor to form an image. Due to the small size of the lens assembly, the camera module can be easily miniaturized.

[0035] In a fourth aspect, the present application provides a terminal device comprising a housing and a camera module as provided in the third aspect, the camera module being mounted in the housing. The terminal device may be a common mobile terminal such as a mobile phone, tablet computer, or laptop, or a camera terminal for use in vehicles, security, and other fields. The camera module can be miniaturized, making the terminal device more portable and facilitating a more rational layout of components within the terminal device housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

[0037] FIG2a is a schematic structural diagram of a camera module provided in an embodiment of the present application;

[0038] FIG2 b is a schematic structural diagram of a camera module provided in an embodiment of the present application;

[0039] FIG3a is a schematic structural diagram of a trimmed lens in a lens assembly provided by an embodiment of the present application;

[0040] FIG3 b is a schematic structural diagram of a trimmed lens in a lens assembly provided by an embodiment of the present application;

[0041] FIG3 c is a simplified structural diagram of a trimmed lens in a lens assembly provided by an embodiment of the present application;

[0042] FIG4a is a schematic diagram of the cooperation state of a lens barrel and a lens group of a lens assembly provided by an embodiment of the present application;

[0043] FIG4 b is a schematic diagram of the coordination state of a lens barrel and a lens group of a lens assembly provided by an embodiment of the present application;

[0044] FIG5a is a schematic structural diagram of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0045] FIG5 b is a perspective view of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0046] FIG5 c is a perspective view of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0047] FIG6 a is a schematic structural diagram of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0048] FIG6 b is an enlarged view of the details at M1 in FIG6 a ;

[0049] FIG7 a is a schematic diagram of the cooperation between a lens barrel and a trimmed lens of a lens assembly provided by an embodiment of the present application;

[0050] FIG7 b is an enlarged view of the details at M2 in FIG7 a ;

[0051] FIG8a is a schematic structural diagram of a first annular mounting surface of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0052] FIG8 b is a schematic structural diagram of a first annular mounting surface of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0053] FIG8c is a schematic structural diagram of a first annular mounting surface of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0054] FIG9 a is an exploded view of a lens assembly provided in an embodiment of the present application;

[0055] FIG9 b is a schematic cross-sectional view of a lens assembly according to an embodiment of the present application;

[0056] FIG9c is a schematic cross-sectional view of a lens assembly according to an embodiment of the present application;

[0057] FIG9 d is a schematic diagram of a partial cross-sectional structure of a lens assembly provided in an embodiment of the present application;

[0058] FIG10a is a schematic structural diagram of a first pressure ring of a lens assembly provided in an embodiment of the present application;

[0059] FIG10 b is a schematic cross-sectional view of a first pressure ring of a lens assembly provided in an embodiment of the present application;

[0060] FIG10c is a simplified diagram of the cooperation between the first pressure ring and the trimmed lens of a lens assembly provided by an embodiment of the present application;

[0061] FIG11a is a schematic diagram of the cooperation between a lens barrel and a lens group of a lens assembly provided by an embodiment of the present application;

[0062] FIG11 b is a schematic diagram of the cooperation between the lens barrel and the lens group of a lens assembly provided by an embodiment of the present application;

[0063] FIG12a is a schematic structural diagram of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0064] FIG12 b is a perspective view of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0065] FIG12c is a perspective view of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0066] FIG13a is a schematic structural diagram of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0067] FIG13b is an enlarged view of the details at N1 in FIG13a;

[0068] FIG14a is a schematic diagram of the cooperation between a lens barrel and a circular lens of a lens assembly provided by an embodiment of the present application;

[0069] FIG14b is an enlarged view of the details at N2 in FIG14a;

[0070] FIG15a is a schematic structural diagram of a second annular mounting surface of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0071] FIG15 b is a schematic structural diagram of a second annular mounting surface of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0072] FIG15c is a schematic structural diagram of a second annular mounting surface of a lens barrel of a lens assembly provided in an embodiment of the present application;

[0073] FIG16a is an exploded view of a lens assembly provided in an embodiment of the present application;

[0074] FIG16 b is a schematic cross-sectional view of a lens assembly according to an embodiment of the present application;

[0075] FIG16c is a schematic cross-sectional view of a lens assembly according to an embodiment of the present application;

[0076] FIG17 is a schematic diagram of a partial cross-sectional structure of a lens assembly provided in an embodiment of the present application;

[0077] FIG18a is a schematic structural diagram of a trimmed lens of a lens assembly provided in an embodiment of the present application;

[0078] FIG18b is a schematic structural diagram of a trimmed lens of a lens assembly provided in an embodiment of the present application;

[0079] FIG19 is a schematic structural diagram of a trimmed lens of a lens assembly provided in an embodiment of the present application;

[0080] FIG20 a is a schematic structural diagram of a quasi-circular lens of a lens assembly provided in an embodiment of the present application;

[0081] FIG20 b is a schematic structural diagram of a quasi-circular lens of a lens assembly provided in an embodiment of the present application;

[0082] FIG21 is a schematic diagram showing the cooperation between a lens barrel and a quasi-circular lens of a lens assembly provided in an embodiment of the present application.

[0083] Reference numerals: 100 - camera module; 200 - housing; 10 - lens assembly; 20 - image sensor; 30 - camera motor; 1 - lens barrel; 11 - inner wall; 111 - first annular mounting surface; 1111 - first arc surface; 1112 - first tangent surface; 112 - second annular mounting surface; 1131 - first supporting surface; 1132 - second supporting surface; 114 - third annular mounting surface; 12 - outer wall; 121 - first annular surface; 1211 - second arc surface; 1212 - second tangent surface; 122-second annular surface; 2-lens group; 21-trimmed lens; 2101-optical lens portion; 2102-edge portion; 211-arc segment; 2110-side section; 2111-first sub-arc surface; 2112-second sub-arc surface; 212-straight line segment; 22-circular lens; 231-first pressure ring; 2311-arc portion; 2312-bow portion; 232-second pressure ring; 24-compensating aperture; 251-first connecting piece; 252-second connecting piece; 26-quasi-circular lens. DETAILED DESCRIPTION

[0084] Camera functionality is a fundamental feature of current terminal devices. To achieve high image quality and high resolution, camera modules have become increasingly complex, and this increased structural complexity increases the size of the camera module. To address the conflict between the increased size of the camera module and the miniaturization and portability of terminal devices, the camera module's lens barrel can be trimmed to reduce its size. However, the trimmed lens barrel, when combined with the round lens, can lead to uneven injection shrinkage during the manufacturing process, resulting in large assembly tolerances between the lens barrel and the lens, and poor coaxiality between the different lenses.

[0085] Based on this, an embodiment of the present application provides a lens barrel, a lens assembly, a camera module and a terminal device. The lens barrel adopts a trimmed design to match the trimmed lens, which can reduce the volume of the lens while ensuring the assembly coaxiality of the lens barrel when assembling the trimmed lens.

[0086] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0087] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0088] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0089] The terminal device provided in the embodiment of the present application can be a common mobile terminal such as a mobile phone, a tablet computer or a notebook, or a camera terminal in the fields of vehicle-mounted, security, etc. As shown in Figure 1, Figure 1 shows a structural schematic diagram of a mobile phone, which includes a shell 200 and a device arranged in the shell 200. Among them, the above-mentioned device includes a camera module 100. During specific assembly, the camera module 100 is fixed in the shell 200, and the shell 200 is provided with an opening that cooperates with the camera module 100 so that the lens of the camera module 100 is exposed. The camera module 100 has a smaller size, which makes the terminal device more portable and is also conducive to the rationalization of the device layout in the shell of the terminal device.

[0090] Figure 2a illustrates the structure of a camera module 100, which includes a lens assembly 10 and an image sensor 20. The lens assembly 10 is disposed on the object side of the image sensor 20. As shown in Figure 2a, the lens assembly 10 includes a lens barrel 1 and a lens group 2. The lens group 2 is assembled to the lens barrel 1 and forms a channel for light to pass through. The channel is parallel to the optical axis Q of the lens group 2. Light from the object side passes through the lens assembly 10 and is projected onto the image sensor 20 to form an image. The image sensor 20 includes the image sensor body, as well as other external components and supporting structures.

[0091] FIG2 b illustrates the structure of another camera module 100. The difference from the structure shown in FIG2 b is that the camera module 100 further includes a camera motor 30. The fixed end of the camera motor 30 is fixed relative to the image sensor 20, and the lens assembly 10 is fixed to the movable end of the camera motor 30. The drive motor 30 can drive the lens assembly 10 toward or away from the image sensor 20 to meet the needs of focused imaging.

[0092] 2a and 2b , the lens barrel 1 in the lens assembly 10 provided in the embodiment of the present application is a trimmed lens barrel, the outer peripheral surface of which has a planar cut surface, so that the lens barrel 1 has a smaller size on the surface perpendicular to the optical axis Q direction of the lens group 2.

[0093] The lens assembly 2 provided in the embodiment of the present application includes at least one trimmed lens 21 as shown in FIG. 3 a . The trimmed lens 21 has an arc segment 211 and a straight segment 212 in the circumference thereof. The straight segment 212 is the trimmed edge of the trimmed lens 21 .

[0094] As shown in Figure 3b, each trimmed lens 21 includes an optical lens portion 2101 and an edge portion 2102 surrounding the optical lens portion 2101. The optical lens portion 2101 is the effective area for the trimmed lens 21 to perform its optical function. For ease of understanding, the optical lens portion 2101 and the edge portion 2102 are separated by a reference circle C. The shaded area within the reference circle C is the optical lens portion 2101, which is also the main optical function effective area of ​​the trimmed lens 21. This gray area can also be referred to as the optical trimming aperture of the trimmed lens 21. Along the radial direction of the lens assembly 2, the radius of the optical lens portion 2101, i.e., the distance h1 between the edge of the optical lens portion 2101 and the optical axis of the lens assembly 2, is greater than 0.8 times the distance h2 between the trimmed edge of the trimmed lens 21 and the optical axis of the lens assembly 2, enabling the trimmed lens 21 to perform an excellent light regulation function. Furthermore, the difference between h2 and h1 is h3, which can be considered the distance between the optical lens portion 2101 and the trimmed edge of the trimmed lens 21. This distance can be considered the structural margin or structural extension of the optical lens portion 2101. h3 is greater than 0.03 mm, ensuring the dimensional accuracy of the optical lens portion 2101. This structural design can ensure good optical performance and structural strength of the trimmed lens 21.

[0095] The simplified structure of the trimmed lens 21 shown in Figure 3c is that the trimmed lens 21 can be formed by trimming a circular lens. The dotted line shows the original circular lens. The trimmed lens 21 can be obtained by uniformly cutting the circular lens multiple times in the circumference, and the original arc-shaped edge of the circular lens is between the two cut edges. Exemplarily, the trimmed lens 21 includes four arc segments 211 and a straight line segment 212. The four straight line segments 212 are evenly distributed around the central axis of the trimmed lens 21. The distance between each straight line segment 212 and the central axis of the trimmed lens 21 is equal, and each line segment is symmetrical about its own central axis. Figures 4a and 4b are diagrams of the lens assembly 10 provided in an embodiment of the present application. As shown in Figures 4a and 4b, the lens assembly 10 includes a lens barrel 1 and a lens group 2. The lens group 2 includes at least one trimmed lens 21 similar to that shown in Figure 3a. Exemplarily, the multiple lenses in the lens group 2 are arranged in sequence along the optical axis Q and can be fixed to the lens barrel 1. The plurality of lenses include a plurality of trimmed lenses 21, and the straight line segments 212 of each trimmed lens 21 are parallel to each other. The lens barrel 1 has a cavity that runs through the optical axis Q of the lens group 2, and the cavity can be used to install the lens group 2. It can be considered that the lens barrel 1 is a cylindrical structure surrounding the optical axis Q, and the two ends of the lens barrel 1 along the optical axis Q are open. The lens barrel 1 has an inner wall 11 and an outer wall 12. The inner wall 11 is the cavity wall of the lens barrel 1, and the outer wall 12 is the outer surface of the lens barrel 1. When the lens group 2 is mounted on the inner wall 11, the circumferential surfaces of the lenses in the lens group 2 cooperate with the inner wall 11.

[0096] As shown in Figure 4a, the outer wall 12 of the lens barrel 1 includes at least one first annular surface 121, one of which is shown schematically with shading. The first annular surface 121 includes multiple second curved surfaces 1211 and multiple second tangent surfaces 1212, which are alternately connected around the optical axis Q. The distance between any second curved surface 1211 and the optical axis Q of the lens assembly 2 is no less than the distance between any second tangent surface 1212 and the optical axis Q of the lens assembly 2. This results in the outer wall 12 of the lens barrel 1 having a trimmed-edge structure, reducing the size of the lens barrel 1 in a direction perpendicular to the optical axis Q. When the lens assembly 2 is mated with the lens barrel 1, the second tangent surface 1212 is parallel to the straight line segment 212 of the trimmed lens 21. In Figure 4a, the radial dimensions of the multiple lenses in the lens assembly 2 tend to increase from the object side to the image side. Accordingly, the radial dimensions of the outer wall 12 of the lens barrel 1 also tend to change in a manner that matches that of the lens assembly 2, minimizing the volume of the lens barrel 1.

[0097] Continuing with reference to FIG4 b , the inner wall 11 includes at least one first annular mounting surface 111, which is in the form of a ring extending in the direction of the optical axis Q. The shaded portion of FIG4 a illustrates one of the first annular mounting surfaces 111. Specifically, when the inner wall 11 includes a plurality of first annular mounting surfaces 111, the plurality of first annular mounting surfaces 111 are sequentially arranged along the direction of the optical axis Q. Each first annular mounting surface 111 can be used to mount a trimmed lens 21 in the lens assembly 2. It should be understood that the lens assembly 2 includes at least one trimmed lens 21, and the lens assembly 2 may also include lenses of other shapes, and the inner wall 11 of the lens barrel 1 may be provided with a corresponding mounting structure adapted to the other lens.

[0098] Figure 5a is a schematic structural diagram of the lens barrel 1, and the interior of the lens barrel 1 can be observed from the side of the lens barrel 1 facing the image side. As shown in Figure 5a, multiple first annular mounting surfaces 111 are arranged in sequence along the optical axis Q. Each first annular mounting surface 111 includes multiple first curved surfaces 1111 and multiple first tangent surfaces 1112. The multiple first curved surfaces 1111 and the multiple first tangent surfaces 1112 are alternately connected around the optical axis Q. Based on the overall structure of the lens barrel 1, it can be considered that the first curved surface 1111 is connected between two first tangent surfaces 1112, and the position of the first curved surface 1111 corresponds to the corner of the lens barrel 1. The distance between any one of the first curved surfaces 1111 and the optical axis Q of the lens assembly 2 is not less than the distance between any one of the first tangent surfaces 1112 and the optical axis Q. Along the direction perpendicular to the optical axis Q of the lens group 2, the projection of any first annular mounting surface 111 on the outer wall 12 of the lens barrel 1 is located on the first annular surface 121, the first curved surface 1111 and the second curved surface 1211 correspond to each other along the radial direction of the lens barrel 1, and the first tangent surface 1112 and the second tangent surface 1212 correspond to each other along the radial direction of the lens barrel 1, so that the first annular mounting surface 111 and the first annular surface 121 of the lens barrel 1 can be adapted in shape, so that the wall thickness of the lens barrel 1 remains similar. When manufacturing the lens barrel 1, the inner wall 11 and the outer wall 12 of the lens barrel 1 can maintain similar shrinkage rates, which is conducive to ensuring the roundness of the first annular mounting surface 111 of the lens barrel 1. In particular, along the direction of the optical axis Q, the inner wall 11 of the lens barrel 1 includes an end tangent surface 1113 spaced apart from the first tangent surface 1112, and the end tangent surface 1113 is located at the end of the inner wall 11 of the lens barrel 1 close to the image side. Along the radial direction of the lens barrel 1, the orthographic projection of the end section 1113 on the outer wall 12 of the lens barrel 1 at least partially overlaps with the second section 1212, and the distance D between the end section 1113 and the second section 1212 ranges from 0.2 mm to 2 mm, so as to reduce the outer diameter of the lens barrel 1 as much as possible while ensuring the structural strength of the lens barrel 1.

[0099] Exemplarily, a first annular mounting surface 111 includes four first curved surfaces 1111 and four first cut surfaces 1112, for cooperating with the installation of the aforementioned four-cut edged lens 21. Specifically, between each set of mutually corresponding first annular mounting surfaces 111 and the cut edged lens 21, the first curved surface 1111 is used to circumferentially cooperate with the corner arc of the cut edged lens 21, that is, the arc segment 211 of the cut edged lens 21, and the first curved surface 1111 and the arc segment 211 can achieve an interference fit. When the cut edged lens 21 is mounted on the first annular mounting surface 111, the arc segment 211 of the cut edged lens 21 and the first curved surface 1111 of the first annular mounting surface 111 are installed by interference fit, thereby reducing the contact area between the cut edged lens 21 and the lens barrel 1, and reducing the assembly fitting stress between the lens barrel 1 and the cut edged lens 21. Furthermore, by ensuring that the first annular mounting surface 111 precisely mates with the arc segments 211 of the trimmed lens 21, the manufacturing difficulty of the lens barrel 1 can be reduced, and the roundness of the first annular mounting surface 111 and the trimmed lens 21 can be easily ensured. The coaxiality of the multiple lenses of the lens assembly 2 can also be ensured after assembly. The four first arc surfaces 1111 used to mate with the four-cut trimmed lens 21 can improve the assembly stability of the trimmed lens 21. When the trimmed lens 21 is mounted on one of the first annular mounting surfaces 111 of the lens barrel 1, the distance between the first cut surface 1112 of the first annular mounting surface 111 and the optical axis Q along the radial direction of the lens barrel 1 is greater than or equal to the distance between the straight segment 212 of the trimmed lens 21 and the optical axis Q.

[0100] As shown in Figure 5a, the inner wall 11 of the lens barrel 1 further includes a first bearing surface 1131 and a second bearing surface 1132. The first bearing surface 1131 is located at the end of the inner wall 11 closest to the object side. It is used to axially abut the first lens of the lens assembly 2 closest to the object side. Here, the first bearing surface 1131 is annular and is used to abut the first trimmed lens 21 closest to the object side along the optical axis Q. The second bearing surface 1132 is located between the two first annular mounting surfaces 111. This second bearing surface 1132 is used to axially abut the surface of one of the lenses in the lens assembly 2 facing the object side.

[0101] Continuing with Figure 5a , each first curved surface 1111 includes a first protrusion v1 convex toward the optical axis Q of the lens assembly 2. Each first protrusion v1 has a vertex arc for abutting the trimmed lens 21. Specifically, the first protrusion v1 is configured to abut the arc segment 211 of the trimmed lens 21. The first protrusion v1 further reduces the contact area between the first annular mounting surface 111 and the trimmed lens 21. For ease of illustration, the surface of the first protrusion v1 facing the optical axis Q is shaded in Figure 5a .

[0102] Figures 5b and 5c are perspective structural diagrams of the lens barrel 1 from different angles, with the lines of the outer wall 12 of the lens barrel 1 being indicated by solid lines, and the lines of the inner wall 11 of the lens barrel 1 being indicated by dotted lines. As shown in Figure 5b, along the optical axis Q, the outer wall 12 of the lens barrel 1 includes a plurality of first annular surfaces 121. The different first annular surfaces 121 have different radial dimensions perpendicular to the optical axis Q, thereby forming a stepped surface on the outer wall 12 of the lens 1. Each first annular surface 121 includes four second curved surfaces 1211 and four second tangent surfaces 1212. The four second curved surfaces 1211 and the four second tangent surfaces 1212 are connected in an alternating manner to form an annular surface. A second tangent surface 1212 is connected between any two adjacent second curved surfaces 1211, and a second curved surface 121 is connected between any two adjacent second tangent surfaces 1212. On the inner wall 11 of the lens barrel 1, multiple first annular mounting surfaces 111 are arranged sequentially along the optical axis Q. In a direction perpendicular to the optical axis Q, the projection of each first annular mounting surface 111 on the outer wall 12 falls on the first annular surface 121, achieving a fit between the trimmed inner wall and the trimmed outer wall. In one embodiment, the first bearing surface 1131 is located on the object-facing side of the first first annular mounting surface 111 at the top, and the second bearing surface 1132 is located between the two lowest first annular mounting surfaces 111.

[0103] 5 c , the first arc surface 1111 of each first annular mounting surface 111 corresponds to the second arc surface 1211 of the first annular surface 121 , and the first tangent surface 1112 of the first annular mounting surface 111 corresponds to the second tangent surface 1212 of the first annular surface 121 .

[0104] As shown in Figure 6a, the structure of the lens barrel 1 is observed from the end of the lens barrel 1 closest to the image side along the direction of the optical axis Q. Figure 6b is an enlarged view of the details at point M1 in Figure 6a. Referring to Figures 6a and 6b together, taking one of the first annular mounting surfaces 111 as an example, the dotted line represents the circle within which the first curved surface 1111 is located. A first protrusion v1 protrudes toward the center of the lens barrel 1 in a direction perpendicular to the optical axis Q. The first protrusion v1 and the first curved surface 1111 are integrally formed. Along the radial direction of the lens barrel 1, the maximum distance between the first protrusion v1 and the circle within which the first curved surface 1111 is located is h1. When the trimming lens 21 is mounted on this first annular mounting surface 111, the first protrusion v1 abuts against the curved segment 211 of the trimming lens 21. For ease of understanding, the portion of the first protrusion v1 that abuts the curved segment 211 is considered the first abutting portion, and the contact between this first abutting portion and the curved segment 211 of the trimming lens 21 can be either surface contact or point contact.

[0105] Figure 7a shows a schematic cross-sectional view of the structure of one of the first annular mounting surfaces 111 matingly mounted with a trimmed lens 21. Figure 7b is an enlarged view of a detail at point M2 in Figure 7a. As shown in Figure 7a, the second curved surface 1211 of the outer wall 12 of the lens barrel 1 corresponds to the first curved surface 1111 of the inner wall 11 along the radial direction of the lens barrel 1, and the second tangential surface 1212 corresponds to the first tangential surface 1112. The first curved surface 1111 of the first annular mounting surface 111 is designed to abut against the arc segment 211 of the trimmed lens 21, achieving circumferential fit between the trimmed lens 21 and the lens barrel 1. A gap exists between the first tangential surface 1112 and the straight segment 212 of the trimmed lens 21. As shown in Figure 7b, the first tangential surface 1112 is provided with a first protrusion v1, which projects toward the trimmed lens 21 and abuts against the arc segment 211 of the trimmed lens 21. The location where the first protrusion v1 abuts against the arc segment 211 can be considered the first abutment portion. For the entire first annular mounting surface 111, with the optical axis Q of the lens assembly 2 as a reference, the distance between each first abutment portion and the optical axis Q is comparable. This ensures that after the arc segment 211 of the trimmed lens 21 abuts the first abutment portion, the center of the trimmed lens 21 coincides with the optical axis Q, ensuring coaxiality. The plurality of first protrusions v1 provide circumferential positioning for the trimmed lens 21, facilitating molding and re-molding of the lens barrel 1, improving production efficiency, and reducing production costs.

[0106] In the above embodiment, the surface of the first protrusion v1 that contacts the edge-cut lens 21 is a plane parallel to the optical axis Q, and thus the first abutting portion and the arc segment 211 of the edge-cut lens 211 form a point contact. The first protrusion v1 may also have other shapes, such as a triangular protrusion as shown in FIG8 a , a square protrusion as shown in FIG8 b , or a curved protrusion as shown in FIG8 c .

[0107] The inner wall 11 of the lens barrel 1 of the lens assembly 10 provided in the embodiment of the present application includes a plurality of first annular mounting surfaces 111, and each first annular mounting surface 111 is used to mount a trimmed lens 21. Figure 9a shows an exploded view of the lens assembly 10, and the lens group 2 correspondingly includes at least one trimmed lens 21, and the shape of each trimmed lens 21 is similar to the trimmed lens 21 structure shown in Figure 3a, and both have an arc segment 211 and a straight line segment 212. In the example of Figure 9a, the lens group 2 includes a plurality of trimmed lenses 21, and the arrangement position relationship of the plurality of trimmed lenses 21 is the overlapping position relationship of the plurality of trimmed lenses 21 after installation. The lens group 2 also includes a first pressure ring 231, which is fixed to the lens barrel 1 and can limit the position of at least one trimmed lens 21 along the direction of the optical axis Q on the side of the lens group 2 close to the image side. In addition, the lens assembly 2 may further include a second pressure ring 232, which is fixed to the lens barrel 1 and is capable of limiting the position of at least one trimmed lens 21 near the object side along the optical axis Q. At least one trimmed lens 21 is arranged between the first pressure ring 231 and the second pressure ring 232. The lens assembly 2 may further include at least one compensation diaphragm 24. When assembling the lens assembly 2 and the lens barrel 1, different specifications and quantities of compensation diaphragms 24 may be selected based on the specifications of different trimmed lenses 21, thereby adjusting the spacing between two adjacent trimmed lenses 21 in the plurality of trimmed lenses 21. The number of second pressure rings 232 may also be multiple. By using the multiple pressure rings of the first pressure ring 231 and at least one second pressure ring 232 to cooperate with the inner wall of the lens barrel 1 to group and limit the lens assembly 2, the reliability of the lens assembly 10 can be improved.

[0108] The cross-sectional structure of the lens assembly 10 can be seen in Figures 9b and 9c. With reference to a first annular mounting surface 111, the cross-section shown in Figure 9b passes through two opposing first curved surfaces 1111, while the cross-section shown in Figure 9c passes through two opposing first tangential surfaces 1112. As shown in Figures 9b and 9c together, the lens assembly 2 exemplarily includes eight trimmed lenses 21, each of which is affixed to a first annular mounting surface 111 of the lens 1. Specifically, the trimmed lenses 21 abut against the first curved surface 1111 of the first annular mounting surface 1111. The first protrusion v1 on the first curved surface 1111 is not shown. A gap exists between the trimmed lenses 21 and the first tangential surface 1112 of the first annular mounting surface 111. The second bearing surface 1132 is located between the first bearing surface 1131 and the first pressure ring 231, and the second pressure ring 232 is located between the first bearing surface 1131 and the second bearing surface 1132. The first supporting surface 1131 and the second pressure ring 232 can limit and fix the seven edge-cutting lenses 21 close to the object side along the optical axis Q direction, and the second supporting surface 1132 and the first pressure ring 231 can limit and fix the one edge-cutting lens 21 close to the image side along the optical axis Q direction.

[0109] From the object side to the image side, that is, from top to bottom in Figures 9b and 9c, the eight trimming lenses 21 are respectively trimming lens 21a, trimming lens 21b, trimming lens 21c, trimming lens 21d, trimming lens 21e, trimming lens 21f, trimming lens 21g, and trimming lens 21h. Trimming lenses 21a, 21b, 21c, 21d, 21e, 21f, and 21g form a group, designated as the first lens group. The side of trimming lens 21a facing the object side abuts against the first supporting surface 1131 of lens barrel 1, while the side of trimming lens 21g facing the image side is secured by a second pressure ring 232. Second pressure ring 232 has a circumferential interference fit with inner wall 11, and the surface of second pressure ring 232 facing the object side presses against trimming lens 21g. For the first lens group consisting of the trimmed lens 21b, the trimmed lens 21c, the trimmed lens 21d, the trimmed lens 21e, the trimmed lens 21f, and the trimmed lens 21g, each trimmed lens 21 is circumferentially fixed by the first arc surface 1111 of the first annular mounting surface 111, the first trimmed lens 21a facing the object side is axially abutted against the first bearing surface 1131 of the lens barrel 1 along the optical axis Q, and the first trimmed lens 21g facing the image side is fixed by the second pressure ring 232, that is, the entire first lens group can be limited and fixed by the first bearing surface 1131 and the second pressure ring 232 along the optical axis Q. Between any two adjacent trimmed lenses 21 in the first lens group, the one closer to the image side axially abuts against the one closer to the object side to achieve axial assembly, thereby reducing the contact surface between the lens and the lens barrel 1 and facilitating the coaxiality between the multiple lenses. At least one compensating aperture 24 is disposed between the first pressure ring 231 and the trimmed lens 21g. Each compensating aperture 24 is specifically located between two adjacent lenses and is used to adjust the distance between the two adjacent lenses along the optical axis. The trimmed lens 21h can be considered as the second lens group, and its surface near the object side along the optical axis Q can abut against the second bearing surface 1132. Alternatively, at least one compensating aperture 24 can be further disposed between the trimmed lens 21h and the second bearing surface 1132. The first pressure ring 231 has an interference fit with the inner wall 11 of the lens barrel 1 and abuts against the image-facing surface of the trimmed lens 21h, axially securing the trimmed lens 21h. The compensating aperture 24 can be used to adjust the axial distance between the lenses. It should be understood that the second lens group may also include multiple trimmed lenses 21. When the second lens group includes multiple trimmed lenses 21, any two trimmed lenses 21 abut against each other, and the entire second lens group can be fixed along the optical axis Q by the second bearing surface 1132 and the first pressure ring 231.

[0110] In some embodiments, based on the lens assembly 10 shown in FIG9 c , as shown in the partial structural cross-section of the lens assembly 10 in FIG9 d , the first pressing ring 231 can be fixed to the inner wall of the lens barrel 1 via a first connecting member 251, and the second pressing ring 232 can be fixed to the inner wall of the lens barrel 1 via a second connecting member 252. It can be considered that the multiple circular lenses 22 included in the lens group 2 can be fixed relative to the lens barrel 1 via the second pressing ring 232 in conjunction with the second connecting member 252, and the single trimmed lens 21 included in the lens group 2 can be fixed relative to the lens barrel 1 via the first pressing ring 231 in conjunction with the first connecting member 251. Here, the first connecting member 251 and the second connecting member 252 are exemplified based on the final structure. The first connecting member 251 can be an adhesive, a bolt, a screw, a solder, etc., and the second connecting member 252 can also be an adhesive, a bolt, a screw, a solder, etc. Taking the first connecting member 251 and the second connecting member 252 as an adhesive as an example, when assembling the lens assembly 10, after assembling the plurality of circular lenses 22, the second pressure ring 232 is fixed to the inner wall of the lens barrel 1 through a dispensing process, and then the trimmed lens 21 is assembled, and the first pressure ring 231 is fixed to the inner wall of the lens barrel 1 through a dispensing process. The structure after the glue of the two dispensings is cured is the first connecting member 251 and the second connecting member 252. Through the two dispensings, the combination of the lens group 2 and the lens barrel 1 has better stability and reliability, and is also conducive to improving the optical performance of the lens group 2.

[0111] Figure 10a illustrates the structure of the first pressure ring 231. The shape of the first pressure ring 231 matches the shape of the trimmed lens 21. As shown in Figure 10a, the first pressure ring 231 includes multiple curved portions 2311 and multiple arched portions 2312. The multiple curved portions 2311 and the multiple arched portions 2312 are alternately connected to form the annular first pressure ring 231. For the multiple trimmed lenses 21 of the lens assembly 2, the first pressure ring 231 is located on the image side of the multiple trimmed lenses 21 and limits and secures at least one trimmed lens 21 along the optical axis Q. When the first pressure ring 231 is secured to the inner wall 11 of the lens barrel 1, the curved portions 2311 form an interference fit with the corners of the inner wall 11, and the arched portions 2312 of the curved portions 2311 form an interference fit with the flat surface of the inner wall 11. Taking one of the first annular mounting surfaces 1111 of the inner wall 11 as a reference, the corner of the inner wall 11 represents the location of the first curved surface 1111 of the first annular mounting surface 111, and the planar portion of the inner wall 11 represents the location of the first tangent surface 1112 of the first annular mounting surface 111. It should be noted that the arcuate portion 2311 protrudes toward the trimmed lens 21 to form a reinforcement portion. The arcuate portion 2311 includes a pressure surface t for contacting the arc segment 211 of the trimmed lens 21. The arched portion 2312 connecting the two arcuate portions 2311 is concave and arched toward the side away from the trimmed lens 21. When compressed and deformed, the arched portion 2312 can provide thrust to the arcuate portion 2311. Along the circumference of the first pressure ring 231, the length of the arched portion 2312 is greater than the length of the arched portion 2311. The longer the arched portion 2312, the greater the compression deformation, and the greater the thrust provided to the arcuate portion 2311.

[0112] Referring to the schematic cross-sectional structure diagram of the first pressure ring 231 shown in FIG10b , the cross-section passes through two opposing arcuate portions 2311. As shown in FIG10b , each arcuate portion 2312 and the arcuate portions 2311 at both ends of the arcuate portion 2312 form an overall arcuate structure. The pressing surface t of the arcuate portion 2311 is used to secure the arc segment 211 of the trimmed lens 21, and the arcuate portion 2312 bulges toward the side away from the trimmed lens 21.

[0113] Figure 10c illustrates a simplified structural diagram of the first pressing ring 231 mating with a trimmed lens 21. As shown in Figure 10c, when the first pressing ring 231 forms a circumferential interference fit with the inner wall of the lens barrel 1 and the pressing surface t of the arcuate portion 2311 presses against the trimmed lens 21, the first pressing ring 231 is squeezed circumferentially by the lens barrel 1, causing the arcuate portion 2312 to deform toward the side away from the trimmed lens 21 as indicated by the solid arrow. The deformed arcuate portion 2312 is shown by the dashed line. The deformation of the arcuate portion 2312 exerts a force on the arcuate portions 2311 at both ends of the arcuate portion 2312, causing the arcuate portion 2311 to tend toward the trimmed lens 21 as indicated by the dashed arrows. This, in turn, acts as a pre-tightening and pressing force on the trimmed lens 21 via the pressing surface t. When the lens assembly 10 is hit or shaken, the force of the lens barrel 1 on the first pressure ring 231 can be absorbed by the deformation of the arched portion 2312, and the deformation of the arched portion 2312 will pre-tighten and fix the trimmed lens 21 through the pressure surface t of the arc portion 2311, further protecting the trimmed lens 21 from the impact or shaking.

[0114] The embodiment of the present application also provides a lens assembly 10 as shown in Figures 11a and 11b. The lens assembly 10 includes a lens group 2 and a lens barrel 1. The difference from the above embodiment is that the lens group 2 in the lens assembly 10 includes at least one circular lens 22 and at least one trimmed lens 21. Correspondingly, the inner wall 11 of the lens barrel 1 includes at least one first annular mounting surface 111 and at least one second annular mounting surface 112. The multiple second annular mounting surfaces 112 are located on the side of the first annular mounting surface 111 close to the object side. Each first annular mounting surface 111 is used to correspondingly assemble a trimmed lens 21. The structure and matching method of the trimmed lens 21 and the first annular mounting surface 111 are similar to those in the above embodiment and will not be repeated here.

[0115] As shown in FIG11 a , the outer wall 12 of the lens barrel 1 includes at least one first annular surface 121 and at least one second annular surface 122, with one first annular surface 121 being exemplarily shown with shaded portions. The first annular surface 121 includes a plurality of second curved surfaces 1211 and a plurality of second tangent surfaces 1212, which are alternately connected around the optical axis Q. The first annular surface 121 is similar in shape to the first annular surface 121 in the above-described embodiment and will not be described in detail herein. The second annular surface 122 is rotationally symmetrical around the optical axis Q.

[0116] Exemplarily, the inner wall 11 of the lens barrel 1 includes a first annular mounting surface 111 and multiple second annular mounting surfaces 112. In FIG. 11 b , the first annular mounting surface 111 and one of the second annular mounting surfaces 112 are shown shaded. The second annular mounting surfaces 112 are used to circumferentially mount the circular lenses 22 in the lens assembly 2. Each second annular mounting surface 112 is rotationally symmetric about the direction of the optical axis Q. Specifically, when the inner wall 11 includes multiple second annular mounting surfaces 112, the multiple second annular mounting surfaces 112 are arranged sequentially along the direction of the optical axis Q. Each second annular mounting surface 112 can be used to mount one of the circular lenses 22 in the lens assembly 2.

[0117] Figure 12a is a schematic structural diagram of the lens barrel 1, allowing the interior of the lens barrel 1 to be observed from the side of the lens barrel 1 facing the image side. As shown in Figure 12a, the inner wall 11 of the lens barrel 1 includes a first annular mounting surface 111 and multiple second annular mounting surfaces 112. The first annular mounting surface 111 is located on the side of the lens barrel 1 near the image side, and the multiple second annular mounting surfaces 112 are located on the side of the lens barrel 1 near the object side. Each first annular mounting surface 111 includes multiple first curved surfaces 1111 and first tangent surfaces 1112. The multiple first curved surfaces 1111 and the multiple first tangent surfaces 1112 are alternately connected around the optical axis Q. The distance between any point on the first curved surface 1111 and the optical axis Q of the lens assembly 2 is not less than the distance between any point on the first tangent surface 1112 and the optical axis Q. Along the direction perpendicular to the optical axis Q of the lens group 2, the projection of any first annular mounting surface 111 on the outer wall 12 of the lens barrel 1 is located on the first annular surface 121, the first curved surface 1111 and the second curved surface 1211 correspond to each other, and the first tangent surface 1112 and the second tangent surface 1212 correspond to each other, so that the first annular mounting surface 111 and the first annular surface 121 of the lens barrel 1 can be adapted in shape, so that the wall thickness of the lens barrel 1 remains similar. When manufacturing the lens barrel 1, the inner wall 11 and the outer wall 12 of the lens barrel 1 can maintain a similar shrinkage rate, which is conducive to ensuring the roundness of the first annular mounting surface 111 of the lens barrel 1.

[0118] As shown in Figure 12a, the inner wall 11 of the lens barrel 1 also includes a first bearing surface 1131 and a second bearing surface 1132. The first bearing surface 1131 is located at the end of the inner wall 11 near the object side. The first bearing surface 1131 is used to axially abut the first lens of the lens assembly 2 near the object side. Here, the first bearing surface 1131 is annular and is used to abut the first circular lens 22 near the object side along the optical axis Q. The second bearing surface 1132 is located between the adjacent first annular mounting surface 111 and the second annular mounting surface 112. This second bearing surface 1132 is used to axially abut the surface of the trimmed lens 21 in the lens assembly 2 facing the object side.

[0119] Continuing with reference to FIG12a , in each first annular mounting surface 111, the first arc surface 1111 includes a first protrusion v1 convex toward the optical axis Q of the lens group 2. Each first protrusion v1 has a vertex arc for abutting the trimmed lens 21, that is, the first protrusion v1 is used to abut the arc segment 211 of the trimmed lens 21. The structure of the first annular mounting surface 111 and the trimmed lens 21 has been described in detail in the above embodiments and will not be repeated here. Each second annular mounting surface 112 includes at least three second protrusions v2, each of which is used to assemble and fix the circular lens 22 along the circumference of the circular lens 22. For example, the number of second protrusions v2 can be 3. In the field of geometry, three points can locate a certain circle. Therefore, the three second protrusions v2 can determine the second annular mounting surface 112, and thus can determine the circular lens 22 that matches the second annular mounting surface 112. When the circular lens 22 is mounted on the second annular mounting surface 112, the circumferential edge of the circular lens 22 is circumferentially matched with the plurality of second protrusions v2 of the second annular mounting surface 112 to achieve installation, reducing the contact area between the circular lens 22 and the lens barrel 1, and reducing the assembly and matching stress of the lens barrel 1 and the circular lens 22. In addition, as long as the second annular mounting surface 112 ensures that the second protrusions v2 and the arc segment 211 of the circular lens 22 can be accurately matched, the manufacturing difficulty of the lens barrel 1 can be reduced, and the roundness matching degree of the second annular mounting surface 112 and the circular lens 22 can be easily ensured. After the multiple lenses of the lens assembly 2 are assembled, the coaxiality can also be ensured. For ease of understanding, the surface of the first protrusion v1 facing the optical axis Q and the surface of the second protrusion v2 facing the optical axis Q are shown with shading in Figure 12a.

[0120] Figures 12b and 12c are perspective structural diagrams of the lens barrel 1 from different angles, with the lines of the outer wall 12 of the lens barrel 1 indicated by solid lines, and the lines of the inner wall 11 of the lens barrel 1 indicated by dotted lines. As shown in Figure 12b, along the optical axis Q, the lens barrel 1 is divided into a W1 segment and a W2 segment, with the W1 segment being closer to the object side and the W2 segment being closer to the image side. In the outer wall 12 of the lens barrel 1, a first annular surface 121 is located in the W1 segment, and a second annular surface 122 is located in the W2 segment, with a step surface formed between the W1 and W2 segments. In a direction perpendicular to the optical axis Q, the radial dimension of the W1 segment is greater than that of the W2 segment. In the inner wall 11 of the lens barrel 1, a first annular mounting surface 111 is located in the W1 segment, and a second annular mounting surface 112 is located partially in the W1 segment and partially in the W2 segment. That is to say, along the direction perpendicular to the optical axis Q, the projection of the first annular mounting surface 111 on the outer wall 12 falls on the first annular surface 121, realizing the matching of the cut edge inner wall and the cut edge outer wall. The projection of part of the second annular mounting surface 112 on the outer wall 12 falls on the second annular surface 122, realizing the matching of the circular inner wall and the circular outer wall. The projection of part of the second annular mounting surface 112 on the outer wall 12 falls on the first annular surface 121, realizing the matching of the circular inner wall and the cut edge inner wall. Among them, the first bearing surface 1131 is located on the side of the first second annular mounting surface 112 at the top facing the object side, and the second bearing surface 1132 is located between the adjacent first annular mounting surface 111 and the second annular mounting surface 112.

[0121] Continuing with FIG. 12 c , each second annular mounting surface 112 is illustratively provided with three second protrusions v2, and the second protrusions v2 of the plurality of second annular mounting surfaces 112 correspond sequentially along the direction of the optical axis Q. The first arcuate surface 1111 of the first annular mounting surface 111 corresponds to the second arcuate surface 1211 of the first annular surface 121, and the first tangent surface 1112 of the first annular mounting surface 111 corresponds to the second tangent surface 1212 of the first annular surface 121.

[0122] As shown in Figure 13a, the structure of the lens barrel 1 is observed from the end of the lens barrel 1 closest to the image side along the direction of the optical axis Q. Figure 13b is an enlarged view of the detail at point N1 in Figure 13a. Referring to both Figures 13a and 13b, the dotted line at the first annular mounting surface 111 represents the circle containing the first curved surface 1111. The first protrusion v1 protrudes toward the center of the lens barrel 1 in a direction perpendicular to the optical axis Q. The first protrusion v1 and the first curved surface 1111 are integrally formed. Along the radial direction of the lens barrel 1, the maximum distance between the first protrusion v1 and the circle containing the first curved surface 1111 is h1. When the trimming lens 21 is mounted on the first annular mounting surface 111, the first protrusion v1 abuts the curved segment 211 of the trimming lens 21. For ease of understanding, the portion of the first protrusion v1 that abuts the curved segment 211 is the first abutting portion, and the contact between the first abutting portion and the curved segment 211 of the trimming lens 21 can be either surface contact or point contact. The dotted line at the second annular mounting surface 112 is the circle where the second annular mounting surface 112 is located. The second protrusion v2 protrudes toward the center of the lens barrel 1 in a direction perpendicular to the optical axis Q. The second protrusion v2 and the second annular mounting surface 112 have an integrated structure. Along the radial direction of the lens barrel 1, the maximum distance between the second protrusion v2 and the circle where the second annular mounting surface 112 is located is h2. When the circular lens 22 is mounted on the second annular mounting surface 112, the second protrusion v2 abuts against the circular lens 22. For ease of understanding, it can be considered that the part where the second protrusion v2 abuts against the circular lens 22 is the second abutting portion, which can be surface contact or point contact between the second abutting portion and the circular lens 22. In the direction perpendicular to the optical axis Q, the distance between each second abutting portion and the optical axis Q is equal, ensuring that the three second protrusions v2 can locate a circle with the center of a circle on the optical axis Q.

[0123] In the example of Figure 13a, the three second protrusions v2 are evenly distributed around the optical axis Q, forming an equilateral triangle between the three second protrusions v2. The three dotted lines respectively indicate the positions of the central axes of the three second protrusions v2. The surface of one of the second protrusions v2 facing the center of the lens barrel 1 is parallel to one of the first tangent surfaces 1112. The central axis of the second protrusion v2 is collinear with the central axis of the first tangent surface 1112. The central axis is the dotted line indicated by the arrow. The second protrusion v2 is axisymmetric about this central axis, and the first tangent surface 1112 is also axisymmetric about this central axis. During the manufacture of the lens barrel 1, the second protrusion v2 and the first tangent surface 1112 can be used as a reference datum for manufacturing, reducing production difficulty.

[0124] Figure 14a shows a schematic cross-sectional view of the structure of a second annular mounting surface 112 matingly mounted with a circular lens 22. Figure 14b is an enlarged view of a detail at position N2 in Figure 14a. The cross-section shown in Figure 14a is a combination of the outer wall of the cut surface and the circular inner wall. Part of the second annular mounting surface 112 circumferentially abuts the circular lens 22, achieving circumferential fit between the circular lens 22 and the lens barrel 1. A gap exists between the second annular mounting surface 112 and the circular lens 22. As shown in Figure 14b, the second protrusion v2 projects toward and abuts the circular lens 22. The location where the second protrusion v2 abuts the circular lens 22 can be considered the second abutment portion. For the entire second annular mounting surface 112, with reference to the optical axis Q of the lens assembly 2, the distance between each second abutment portion and the optical axis Q is comparable. This ensures that after the circular lens 22 abuts the second abutment portion, the center of the circular lens 22 coincides with the optical axis Q, thus ensuring coaxiality.

[0125] In the above embodiment, the surface of the second protrusion v2 that contacts the circular lens 22 is a plane parallel to the optical axis Q, so point contact is achieved between the second abutting portion and the circular lens 22. The second protrusion v2 may also have other shapes. Taking the combination of a circular inner wall and a circular outer wall as an example, the second protrusion v2 may also be a triangular protrusion as shown in FIG15a, a square protrusion as shown in FIG15b, or a curved protrusion as shown in FIG15c.

[0126] The inner wall 11 of the lens barrel 1 of the lens assembly 10 provided in the embodiment of the present application includes a first annular mounting surface 111 and multiple second annular mounting surfaces 112. The first annular mounting surface 111 is used to mount a trimmed lens 21, and each second annular mounting surface 112 is used to mount a circular lens 22. Figure 16a shows an exploded view of the lens assembly 10. The multiple lenses included in the lens group 2 are a trimmed lens 21 and multiple circular lenses 22. The shape of the trimmed lens 21 is similar to the trimmed lens 21 shown in Figure 3a, and both have an arc segment 211 and a straight line segment 212. The arrangement position relationship of the multiple lenses of the lens group 2 is the overlapping position relationship of the multiple circular lenses 22 and the trimmed lens 21 after installation shown in Figure 16a. The lens assembly 2 further includes a first pressing ring 231 and a second pressing ring 232. The first pressing ring 231 is fixed to the lens barrel 1 and is capable of limiting the position of the trimming lens 21 on the image side of the lens assembly 2 along the optical axis Q. The second pressing ring 232 is fixed to the lens barrel 1 and is capable of limiting the position of the circular lenses 22 on the image side of the plurality of circular lenses 22 along the optical axis Q. The lens assembly 2 may further include at least one compensating aperture 24 for adjusting the spacing between two adjacent lenses in the plurality of lenses.

[0127] The cross-sectional structure of the lens assembly 10 can be seen with reference to Figures 16b and 16c. The cross-sectional view shown in Figure 16b passes through two opposing second tangential surfaces 1212, and the cross-sectional view shown in Figure 16c passes through two opposing second curved surfaces 1211. For example, the lens assembly 2 includes seven circular lenses 22 and one trimmed lens 21. The circumferential edge of the trimmed lens 21 is fixed to the first annular mounting surface 111 of the lens barrel 1, and the circumferential edge of each circular lens 22 is fixed to a second annular mounting surface 112 of the lens barrel 1. Specifically, the abutment and fixation of the trimmed lens 21 with the first curved surface 1111 of the first annular mounting surface 111 has been described in detail in the above embodiment and will not be repeated here. The second bearing surface 1132 is located between the first bearing surface 1131 and the first pressure ring 231, and the second pressure ring 232 is located between the first bearing surface 1131 and the second bearing surface 1132. Seven circular lenses 22 can be fixed in position along the optical axis Q between the first supporting surface 1131 and the second pressing ring 232 , and one trimmed lens 21 can be fixed in position along the optical axis Q between the second supporting surface 1132 and the first pressing ring 231 .

[0128] Along the direction from the object side to the image side, that is, from top to bottom in Figure 16b and Figure 16c, the seven circular lenses 22 are respectively circular lens 22a, circular lens 22b, circular lens 22c, circular lens 22d, circular lens 22e, circular lens 22f, and circular lens 22g. The side of circular lens 22a toward the object side abuts against the first bearing surface 1131 of lens barrel 1, and the side of circular lens 22g toward the image side is fixed by a second pressing ring 232. The second pressing ring 232 has a circumferential interference fit with the inner wall 11, and the surface of the second pressing ring 232 toward the object side presses circular lens 22g. For the seven circular lenses 22, these seven circular lenses 22 can be regarded as the first lens group. Each circular lens 22 is circumferentially fixed by a second annular mounting surface 112. The first circular lens 22a facing the object side axially abuts against the first bearing surface 1131 of the lens barrel 1 along the optical axis Q, while the first circular lens 22g facing the image side is fixed by a second pressure ring 232. This means that the entire first lens group can be fixed along the optical axis Q by the first bearing surface 1131 and the second pressure ring 232. Between any two adjacent circular lenses 22 in the first lens group, the one closest to the image side axially abuts against the one closest to the object side, achieving axial assembly. This reduces the contact surface between the circular lenses 22 and the lens barrel 1 and helps ensure coaxiality among the multiple circular lenses 22. At least one compensating aperture 24 is disposed between the first pressure ring 231 and the circular lens 22g. The trimmed lens 21 can be considered as the second lens group, and the surface closest to the object side along the optical axis Q can abut against the second bearing surface 1132. Alternatively, at least one compensating aperture 24 can also be disposed between the trimmed lens 21 and the second bearing surface 1132. The first pressure ring 231 is interference-fitted with the inner wall 11 of the lens barrel 1 and abuts the surface of the trimmed lens 21 facing the image side, thereby fixing the trimmed lens 21 axially. The compensation aperture 24 can be used to adjust the axial distance between the lenses. The assembly of the first pressure ring 231 and the trimmed lens 21 can be shown in Figures 10a to 10c, which will not be described here. It should be understood that the second lens group can also include multiple trimmed lenses 21. When the second lens group includes multiple trimmed lenses 21, any two trimmed lenses 21 abut against each other, and the entire second lens group can be fixed along the optical axis Q by the second bearing surface 1132 and the first pressure ring 231.

[0129] In some embodiments, based on the lens assembly 10 shown in FIG16 b , as shown in FIG17 , which is a partial structural cross-section of the lens assembly 10, the first pressing ring 231 can be fixed to the inner wall of the lens barrel 1 via a first connecting member 251, and the second pressing ring 232 can be fixed to the inner wall of the lens barrel 1 via a second connecting member 252. It can be considered that the multiple circular lenses 22 included in the lens group 2 can be fixed relative to the lens barrel 1 via the second pressing ring 232 in conjunction with the second connecting member 252, and the single trimmed lens 21 included in the lens group 2 can be fixed relative to the lens barrel 1 via the first pressing ring 231 in conjunction with the first connecting member 251. Here, the first connecting member 251 and the second connecting member 252 are exemplified based on the final structure. The first connecting member 251 can be an adhesive, a bolt, a screw, a solder, etc., and the second connecting member 252 can also be an adhesive, a bolt, a screw, a solder, etc. Taking the first connecting member 251 and the second connecting member 252 as an adhesive as an example, when assembling the lens assembly 10, after assembling the plurality of circular lenses 22, the second pressure ring 232 is fixed to the inner wall of the lens barrel 1 through a dispensing process, and then the trimmed lens 21 is assembled, and the first pressure ring 231 is fixed to the inner wall of the lens barrel 1 through a dispensing process. The structure after the glue of the two dispensings is cured is the first connecting member 251 and the second connecting member 252. Through the two dispensings, the combination of the lens group 2 and the lens barrel 1 has better stability and reliability, and is also conducive to improving the optical performance of the lens group 2.

[0130] In some embodiments, the trimmed lens 21 is an injection molded body, which can be obtained by an injection molding process. During the injection molding process, the liquid material of the trimmed lens 21 is injected into a set mold, and the solid raw material for forming the trimmed lens 21 is obtained after the liquid cools and solidifies. The raw material also has a structure formed by the material remaining at the gate position during injection molding. The structure of the gate residue needs to be removed before the trimmed lens 21 can be obtained. The gate of the trimmed lens 21 in the embodiment of the present application during injection molding can be located at the arc segment 211 or at the straight segment 212. In other words, the injection molding gate of the trimmed lens 21 is located at the circumferential edge of the trimmed lens 21. Figure 18a illustrates a trimmed lens 21 with a gate K located at the straight segment 212, and Figure 18b illustrates a trimmed lens 21 with a gate K located at the arc segment 212. It should be understood that after the trimmed lens 21 is cast and manufactured, the material residue at the gate K needs to be removed, so the position of the gate K of the trimmed lens 21 during injection molding is shown here with a dotted line.

[0131] Possibly, when the injection gate of the trimmed lens 21 is located at one of the corner arcs, that is, when the injection gate is located at the arc segment 211, along the circumference of the trimmed lens 21, the circumferential dimension of the injection gate is smaller than the circumferential dimension of the arc segment 211. When the gate structure formed by the injection gate is cut off after the injection molding is completed, the arc segment 211 at least retains a portion of its arc shape.

[0132] As shown in FIG19 , a trimmed lens 21 includes at least one corner arc of the trimmed lens 21, which includes a side cutting surface 2110. That is, the arc segment 211 includes a cutting surface 2110. Along the circumference of the trimmed lens 21, the circumferential dimension of the side cutting surface 2110 is smaller than the circumferential dimension of the corner arc, ensuring that the arc segment 211 can mate with the first annular mounting surface 111 of the lens barrel 1. In some embodiments, the corner arc includes a first sub-arc surface 2111 and a second sub-arc surface 2112, which are respectively located on either side of the side cutting surface 2110. In this case, the number of trimmed edges of the trimmed lens 21 is increased, and further adjustment of the lens barrel 1 is possible, potentially further reducing the size of the lens barrel 1.

[0133] In some embodiments, the lens assembly 2 may further include at least one quasi-circular lens 26. The structure of the quasi-circular lens 26 may be shown in Figures 20a and 20b. As shown in Figures 20a and 20b, the circumferential edge of the quasi-circular lens 26 includes at least three lens protrusions v3, each of which is configured to abut against the inner wall of the lens barrel 1, thereby mounting the quasi-circular lens 26 on a circular inner wall of the lens barrel 1.

[0134] Specifically, the outer peripheral surface of the three lens protrusions v3 is a curved surface, and each lens protrusion v3 is used to contact the curved surface of the inner wall of the lens barrel 1. In the traditional assembly method of a circular lens on the inner wall of a circular lens barrel, the radial dimension fluctuation range of the outer periphery of the circular lens is 1-2μ. When the circular lens is assembled on the inner wall of a circular lens barrel, the contact position between the outer peripheral surface of the circular lens and the inner wall of the lens barrel is uncertain, and the squeezing position of the circular lens by the inner wall of the lens barrel through the contact position is uncertain, resulting in unpredictable changes in the surface shape of the circular lens caused by squeezing, which will have an adverse effect on the optical performance of the circular lens. In the quasi-circular lens 26 provided in the embodiment of the present application, the height h of the lens protrusion v3 protruding from the edge of the quasi-circular lens 26 is in the range of 10-50μm, which is much larger than the radial dimension fluctuation range of the outer peripheral surface of the circular lens. When the quasi-circular lens 26 is assembled onto the circular inner wall of the lens barrel 1, the quasi-circular lens 26 is abutted and secured with the circular inner wall of the lens barrel 1 by means of a plurality of lens protrusions v3, with the arcuate contact position of each lens protrusion v3 with the circular inner wall of the lens barrel 1 being controllable. By adjusting the shape and distribution range of the at least three lens protrusions v3, the deformation of the quasi-circular lens 26 caused by the inner wall of the lens barrel 1 can be controlled, which helps the surface shape of the quasi-circular lens 26 within its effective optical range to approach a rotationally symmetrical shape, thereby improving the optical performance of the quasi-circular lens 26.

[0135] Exemplarily, the quasi-circular lens 26 shown in Figure 20a can be formed by designing a notch p on a base circle shown by a dotted line, and a lens protrusion v3 is formed between any two notches p. The arc surface of the outer peripheral surface of each lens protrusion v3 is located on the base circle shown by the dotted line. The radius of the arc surface of each lens protrusion v3 is the same, and each lens protrusion v3 can be assembled on a circular inner wall of the lens barrel 1 in a manner of arc surface contact.

[0136] The central angle α corresponding to any lens protrusion v3 ranges from 10° to 60°. The specific angles of the central angle α corresponding to different lens protrusions v3 may be different.

[0137] For example, the quasi-circular lens 26 has three lens protrusions v3 spaced apart along the circumference of the lens. The central angle α corresponding to each lens protrusion v3 ranges from 10° to 60°. The central angle corresponding to the arc between the positions where the three lens protrusions v3 abut the inner wall 11 is greater than 180°. The specific central angle α corresponding to different lens protrusions v3 can vary.

[0138] Figure 20b shows five lens protrusions v3. Along the circumference of this type of circular lens, the sum of the central angles α corresponding to all lens protrusions v3 ranges from 30° to 180°.

[0139] Corresponding to the quasi-circular lens 26, and in conjunction with the cross-sectional schematic diagram of the lens barrel 1 and the quasi-circular lens 26 shown in Figure 21, the inner wall 11 of the lens barrel 1 includes at least one circular third annular mounting surface 114. Each lens protrusion v3 of the quasi-circular lens 16 abuts against the third annular mounting surface 114, and the contact surface between each lens protrusion v3 and the third annular mounting surface 114 is an arcuate surface. The radial direction of the lens group 2 is perpendicular to the optical axis of the lens group 2, and the radial direction of the lens group 2 is also the radial direction of the quasi-circular lens 26.

[0140] Taking the structure of the lens barrel 1 shown in Figures 12a to 12c as a reference, when the inner wall of the lens barrel 1 includes at least one third annular mounting surface 114 shown in Figure 21, any third annular mounting surface 114 can be located on the side of the at least one first annular mounting surface 111 close to the object side, and the arrangement of the third annular mounting surface 114 and the second annular mounting surface 112 along the optical axis direction is not limited to ensure that the first lens of the lens assembly close to the object side is the trimmed lens 2.

[0141] In summary, the lens barrel 1 provided by the embodiment of the present application is designed with a trimmed inner wall structure to cooperate with the installation of the trimmed lens 21, and is designed with a trimmed outer wall structure that cooperates with the trimmed inner wall structure. While reducing the volume of the lens barrel 1, the roundness requirement of the lens barrel 1 in manufacturing can be guaranteed. When the lens group 2 is assembled in the lens barrel 1, the coaxiality between the multiple lenses can be guaranteed, and the assembly stress between the lens and the lens barrel 1 can be reduced, thereby ensuring the reliability of the lens assembly 10. The lens assembly 10 with this lens barrel 1 has a smaller size at one end on the image side to achieve miniaturization. The lens assembly 10 can be applied in a small terminal device, so as not to occupy a larger space of the terminal device, which is beneficial to a more reasonable layout of the components in the terminal device and also helps the terminal device provide portability.

[0142] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A lens barrel, characterized in that: The lens barrel comprises: an inner wall and an outer wall, wherein the inner wall is used for mounting a lens group; The inner wall comprises at least one first annular mounting surface, each of which is used to mount a trimmed lens in the lens group; each of the first annular mounting surfaces comprises a plurality of first arc surfaces and a plurality of first cut surfaces alternately connected around the optical axis direction of the lens group, each of the first arc surfaces is used to circumferentially match the corner arc of the trimmed lens; the distance between any point of the first arc surface and the optical axis of the lens group is not less than the distance between any point of the first cut surface and the optical axis; The outer wall comprises at least one first surface, the first surface comprises a plurality of second curved surfaces and a plurality of second cut surfaces alternately connected in a direction surrounding the optical axis of the lens; the distance between any point of the second curved surface and the optical axis of the lens group is not less than the distance between any point of the second cut surface and the optical axis of the lens group; Along the direction perpendicular to the optical axis of the lens group, the projection of any one of the first annular mounting surfaces on the outer wall of the lens barrel is located on the first surface, the first arc surface corresponds to the second arc surface, and the first tangent surface corresponds to the second tangent surface.

2. The lens barrel according to claim 1, characterized in that: The first arc surface includes a first protrusion convex toward the optical axis of the lens group, and each of the first protrusions has a first abutment portion for abutting against the vertex arc of the trimmed lens; along a direction perpendicular to the optical axis of the lens, the distance between each first abutment portion and the optical axis is equal.

3. The lens barrel according to claim 2, characterized in that: The inner wall further comprises at least one second annular mounting surface, and the at least one second annular mounting surface is located on a side of the at least one first annular mounting surface close to the object side; the second annular mounting surface is used for circumferentially mounting the circular lens in the lens group, and each of the second annular mounting surfaces is rotationally symmetrical around the optical axis direction of the lens; The outer wall comprises a second surface which is rotationally symmetrical along the optical axis direction of the lens group, and a projection of at least one of the second annular mounting surfaces on the outer wall of the lens barrel is located on the first surface along a direction perpendicular to the optical axis of the lens.

4. The lens barrel according to claim 3, characterized in that: Each of the second annular mounting surfaces includes three second protrusions, each of which has a second abutting portion for abutting against the outer peripheral surface of the circular lens; along a direction perpendicular to the optical axis of the lens, the distance between each of the second abutting portions and the optical axis is equal.

5. The lens barrel according to claim 4, characterized in that: Along a direction perpendicular to the optical axis of the lens group, a central axis of at least one of the second protrusions is collinear with a central axis of one of the first cut surfaces.

6. The lens barrel according to claim 4 or 5, characterized in that: The first abutting portion is in point contact or surface contact with the trimmed lens; and / or the second abutting portion is in point contact or surface contact with the circular lens.

7. The lens barrel according to any one of claims 1 to 6, characterized in that: The inner wall comprises a first bearing surface; Along the optical axis direction of the lens, the first bearing surface is located at an end of the inner wall close to the object side, and the first bearing surface is used to axially abut against the first lens of the lens group close to the object side.

8. The lens barrel according to claim 7, characterized in that: The inner wall includes a second bearing surface; Along the optical axis direction of the lens, the second bearing surface is located on a side of the first bearing surface close to the image side, and the second bearing surface is used to axially abut against a surface of a lens in the lens group facing the object side.

9. The lens barrel according to any one of claims 1 to 8, characterized in that: Along the optical axis direction of the lens group, the inner wall includes an end section surface located at the end of the lens barrel close to the object side, and the end section surface is arranged at an interval with the first section surface; Along the radial direction of the lens barrel, the distance between each end section and the second section ranges from 0.2 mm to 2 mm.

10. A lens assembly, characterized in that: include: A lens assembly and a lens barrel as claimed in any one of claims 1 to 9; The lens group includes at least one edge-cut lens, and each edge-cut lens is correspondingly mounted on one of the first annular mounting surfaces; Each of the trimmed lenses includes a plurality of corner arcs, and the plurality of corner arcs abut against the plurality of first arc surfaces of the corresponding first annular mounting surface one by one.

11. The lens assembly according to claim 10, wherein: The inner wall of the lens barrel further comprises at least one second annular mounting surface, and the at least one second annular mounting surface is located on a side of the at least one first annular mounting surface close to the object side; The lens group includes at least one circular lens, and each of the circular lenses is correspondingly mounted on one of the second annular mounting surfaces.

12. The lens assembly according to claim 11, wherein: A surface of the trimming lens adjacent to the at least one circular lens facing the object side abuts against an inner wall of the lens barrel.

13. The lens assembly according to any one of claims 10 to 12, characterized in that: Each of the trimmed lenses is an injection-molded body, and an injection-molding gate of each of the trimmed lenses is located at a circumferential edge of the trimmed lens.

14. The lens assembly according to claim 13, wherein: The injection gate of at least one of the trimmed lenses is located at one of the corner arcs; Along the circumference of the trimmed lens, the circumferential dimension of the injection gate is smaller than the circumferential dimension of the corner arc.

15. The lens assembly according to any one of claims 10 to 14, characterized in that: At least one of the corner arcs of at least one of the trimmed lenses includes a side cut surface; Along the circumference of the trimmed lens, the circumferential dimension of the side cut surface is smaller than the circumferential dimension of the corner arc.

16. The lens assembly according to claim 15, wherein: Along the circumference of the trimmed lens, the corner arc includes a first sub-arc surface and a second sub-arc surface, and the first sub-arc surface and the second sub-arc surface are respectively located on both sides of the side cut surface.

17. The lens assembly according to any one of claims 10 to 16, characterized in that: The lens assembly further comprises a first pressing ring for fixing to the inner wall of the lens barrel; Along the optical axis direction of the lens group, the first pressing ring is fixed to the inner wall of the lens barrel and abuts against the surface of the trimming lens group close to the image side.

18. The lens assembly according to claim 17, wherein: Along the optical axis direction of the lens group, a plurality of reinforcing parts are provided on a side of the first pressure ring facing the edge cutting lens group, and the plurality of reinforcing parts correspond to the plurality of first arc surfaces one by one; The first pressing ring has an arcuate segment located between any two adjacent reinforcing portions, and the arcuate segment protrudes toward the object side.

19. The lens assembly according to claim 17 or 18, characterized in that: The inner wall of the lens barrel includes a first bearing surface; Along the optical axis direction of the lens group, a surface of the first lens in the lens group close to the object side facing the object side abuts against the first bearing surface.

20. The lens assembly according to claim 19, wherein: The inner wall of the lens barrel comprises a second bearing surface, and the second bearing surface is located between the first bearing surface and the first pressure ring; The lens assembly comprises a second pressing ring for fixing to the inner wall of the lens barrel, wherein the second pressing ring is located between the first bearing surface and the second bearing surface; Along the optical axis direction of the lens group, the lens group includes a first lens group and a second lens, and the first lens group is located on a side of the second lens group facing the object side; The surface of the first lens group facing the object side abuts against the first supporting surface, and the surface of the first lens group facing the image side abuts against the second pressure ring; the surface of the second lens group facing the object side abuts against the second supporting surface, and the surface of the second lens group facing the image side abuts against the first pressure ring.

21. The lens assembly according to claim 20, wherein: The first lens group includes a plurality of lenses, and any two adjacent lenses are in contact with each other along the optical axis direction of the lens group; And / or, the second lens group includes a plurality of lenses, and any two adjacent lenses are in contact with each other along the optical axis direction of the lens group.

22. The lens assembly according to claim 20 or 21, characterized in that: The first pressing ring is fixed to the inner wall of the lens via a first connecting member, and the second pressing ring is fixed to the inner wall of the lens via a second connecting member.

23. The lens assembly of claim 22, wherein: At least one of the first connecting member and the second connecting member is an adhesive, a screw, a bolt or a welding material.

24. The lens assembly according to any one of claims 10 to 23, characterized in that: Each of the trimmed lenses comprises an optical lens portion and an edge portion surrounding the optical lens portion; Along the radial direction of the trimmed lens, the distance between the edge of the optical lens portion and the optical axis of the lens group is greater than 0.8 times the distance between the trimmed edge of the trimmed lens and the optical axis of the lens group.

25. The lens assembly of claim 24, wherein: Along the radial direction of the edge-cut lens, the distance between the optical edge and the edge of the optical lens portion is greater than 0.03 mm.

26. The lens assembly according to any one of claims 10 to 25, characterized in that: The inner wall of the lens barrel further comprises at least one circular third annular mounting surface, and any one of the third annular mounting surfaces is located on a side of the at least one first annular mounting surface close to the object side; The lens group includes at least one quasi-circular lens, and the circumferential edge of each of the quasi-circular lenses includes at least three lens protrusions, each of the lens protrusions has an arc surface for abutting the third annular mounting surface; along the radial direction of the lens barrel, the radius of the arc surface of each lens protrusion is the same.

27. The lens assembly of claim 26, wherein: Along the circumference of the quasi-circular lens, the central angle of any lens protrusion ranges from 10° to 60°.

28. The lens assembly of claim 27, wherein: Along the circumference of the quasi-circular lens, the sum of the central angles of the lens protrusions of the at least three lens protrusions has an angle range of 30°-180°.

29. A camera module, characterized in that: It comprises an image sensor and a lens assembly as described in any one of claims 10-28, wherein the image sensor is arranged on a side of the trimming lens group close to the image side.

30. A terminal device, characterized in that: It comprises a shell and a camera module as described in claim 29, wherein the camera module is installed on the shell.

Images