Lens assembly and electronic equipment

Abstract

The utility model provides a lens assembly and electronic equipment, and relates to the field of imaging technology, and the lens assembly comprises a mounting cylinder and a lens. The mounting cylinder extends along a first direction, the lens is arranged in the mounting cylinder, and the lens is in clearance fit with the inner surface of the mounting cylinder; a mounting part and at least one positioning structure are formed on the inner surface of the mounting cylinder, and the at least one positioning structure is arranged on the mounting part; the lens comprises a lens main body and at least one limiting structure which are connected, the lens main body is arranged in the mounting part, and each limiting structure is in accommodating fit with one positioning structure. The possibility of mutual contact between the lens main body and the side wall of the mounting part can be reduced, the possibility of extrusion deformation of the lens main body is reduced, and the imaging definition of the lens is improved.

Description

[0001] This application claims priority to the Chinese patent application No. 202323402758.1, filed on December 13, 2023, and entitled “Lens assembly and electronic device”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of imaging technology, and in particular to a lens assembly and an electronic device. BACKGROUND

[0003] With the continuous progress of image technology, the application range of optical lenses is becoming more and more extensive, such as smart projection headlamps. The smart projection headlamps can realize high-resolution projection while illuminating, which not only can assist driving and facilitate human-vehicle interaction, but also can enhance the sense of technology and ritual, catering to market demand.

[0004] Currently, in order to pursue low cost and high quality, as many glass-plastic hybrid solutions as possible are used in headlamp lens design. Among them, the plastic lens mostly uses materials with high transmittance such as PMMA, and the lens barrel mostly uses materials with high temperature resistance and good strength such as BMC and PPS.

[0005] The lens under the combination of these materials generally has an expansion coefficient that is only 1 / 4 to 1 / 2 of that of the plastic lens. At high temperatures, the expansion amount of the lens is greater than that of the lens barrel. Under the conventional fit clearance, the plastic lens is squeezed to produce large deformation, and cannot couple light according to the designed light path, resulting in blurred imaging. This situation is more obvious in large-aperture lens solutions, and the squeezing deformation is larger and more troublesome.

[0006] Past solutions have increased the fit clearance between the lens barrel and the lens to prevent squeezing deformation, but the lens assembly is sensitive to eccentricity under large clearance, which can affect the resolution. Alternatively, some lenses may adopt a lens-wrapped lens design, but this solution has the risk of lens breakage due to lens contraction being greater than the lens barrel at low temperatures, and the lens is exposed and not aesthetically pleasing, and is prone to produce stray light and other problems. The outer diameter of the conventional solution lens and the inner diameter of the lens barrel are not uniform, and the lens is not uniformly stressed and deformed when squeezed at high temperatures. Practical new type content

[0007] The lens assembly and the electronic device provided by the embodiments of the present application solve the problem that the lens is prone to squeezing deformation when the ambient temperature of the lens assembly increases, thereby affecting the imaging clarity of the lens.

[0008] The lens assembly provided by the embodiments of the present application comprises a mounting barrel and a lens.

[0009] The mounting cylinder extends along a first direction, the lens is arranged in the mounting cylinder, and the lens is in clearance fit with an inner surface of the mounting cylinder; the inner surface of the mounting cylinder is formed with a mounting portion and at least one positioning structure, and the at least one positioning structure is arranged in the mounting portion;

[0010] The lens comprises a lens body and at least one limiting structure connected to each other, the lens body is arranged in the mounting portion, and each limiting structure is in accommodation fit with one positioning structure.

[0011] By adopting the technical scheme, the lens is arranged to comprise a lens body and a limiting structure, and the inner surface of the lens barrel is formed with a mounting portion and a positioning structure, so that when the lens body is arranged in the mounting portion, the lens can be relatively fixed in the mounting portion by the cooperation between the limiting structure and the positioning structure;

[0012] When the ambient temperature of the lens assembly increases, the lens body and the limiting structure are heated and expanded, the gap between the lens body and the side wall of the mounting portion is reduced, and the gap between the limiting structure and the corresponding positioning structure is reduced, so that the limiting structure is in close abutment with the positioning structure, thereby reducing the possibility of mutual contact between the lens body and the side wall of the mounting portion, reducing the possibility of extrusion deformation of the lens body, and improving the imaging clarity of the lens.

[0013] The embodiment of the application also provides an electronic device comprising the lens assembly according to any one of the preceding lens assemblies.

[0014] Since the electronic device comprises the lens assembly according to any one of the preceding lens assemblies, the electronic device has the advantages of the lens assembly according to any one of the preceding lens assemblies, and specific details can be referred to the related description above, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0016] Figure 1 A structural schematic diagram of the lens assembly provided by the embodiment of the application is shown in the figure;

[0017] Figure 2 A structural schematic diagram of the lens assembly provided by the embodiment of the application is shown in the figure;

[0018] Figure 3 A structural schematic diagram of the lens assembly provided by the embodiment of the application is shown in the figure;

[0019] Figure 4 A structural schematic diagram of the lens assembly provided by the embodiment of the application is shown in the figure; Figure 2 A partial structural enlarged schematic diagram of the lens assembly is shown in the figure;

[0020] Figure 5 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2. Figure 3 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0021] Figure 6 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0022] Figure 7 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0023] Figure 8 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0024] Figure 9 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0025] Figure 10 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0026] Figure 11 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0027] Figure 12 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0028] Figure 13 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0029] Figure 14 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0030] Figure 15 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0031] Figure 16 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0032] Figure 17 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0033] Figure 18 A partial structure enlarged schematic view of the lens assembly provided by the embodiment of the present application is shown in FIG. 2.

[0034] Figure 19Another embodiment of the lens assembly provided by the present application has a first constraint part and a second constraint part.

[0035] Figure 20 A size diagram of the lens assembly provided by the present application is shown in the following.

[0036] Figure 21 A force simulation diagram of the lens assembly provided by the present application is shown in the following.

[0037] Figure 22 A resolution effect diagram of the lens assembly provided by the present application is shown in the following.

[0038] Explanation of reference signs:

[0039] 100, mounting barrel;

[0040] 110, mounting part; 111, positioning structure; 120, second constraint part;

[0041] 200, lens;

[0042] 210, lens body; 211, arc-shaped part; 212, planar part; 220, limiting structure; 221, first abutting surface; 222, second abutting surface; 230, first constraint part;

[0043] 300, first gap;

[0044] 400, second gap;

[0045] 500, functional element;

[0046] 600, third gap.

[0047] The above drawings have shown the specific embodiments of the present application, which will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] The lens assembly includes a mounting barrel and a lens, and the lens is installed inside the mounting barrel to fix the lens by the mounting barrel; for example, the inner wall of the mounting barrel can be formed with a mounting part to accommodate the lens by the mounting part; however, when the ambient temperature of the lens assembly rises, the lens and the mounting barrel are prone to thermal expansion, and because the expansion coefficients of the lens and the mounting barrel are different, the deformation amount of the lens is usually greater than that of the mounting barrel, so that the lens is in close contact with the side wall of the mounting part of the mounting barrel, and even the lens is prone to extrusion deformation, thereby affecting the imaging clarity of the lens.

[0049] To solve the above technical problems, the embodiment of the present application provides a lens assembly and an electronic device, the lens assembly sets the lens as including a lens body and a limiting structure, and forms a mounting portion and a positioning structure on the inner surface of the lens, when the lens body is installed in the mounting portion, a first gap is formed between the lens body and the side wall of the mounting portion, and a second gap is formed between the limiting structure and the corresponding positioning structure, so that the lens can be relatively fixed in the mounting portion by the cooperation of the limiting structure and the positioning structure.

[0050] When the ambient temperature of the lens assembly increases, the lens body and the limiting structure are heated and expanded, the first gap between the lens body and the side wall of the mounting portion is reduced, and the second gap between the limiting structure and the corresponding positioning structure is reduced, since the width of the second gap is smaller than the width of the first gap, the limiting structure first tightly abuts against the positioning structure, thereby reducing the possibility of mutual contact of the lens body and the side wall of the mounting portion, reducing the possibility of extrusion deformation of the lens body of the lens, and improving the imaging clarity of the lens.

[0051] Hereinafter, exemplary embodiments will be described in detail with examples shown in the accompanying drawings. In the following description, same numbers in different drawings represent same or similar elements unless otherwise expressed. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0052] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0053] With reference to Figure 1 The embodiment of the present application provides a lens assembly, which comprises a mounting barrel 100 and a lens 200, the mounting barrel 100 can extend along a first direction (i.e. the x direction in the figure), the inner surface of the mounting barrel 100 forms a mounting portion 110 and at least one positioning structure 111, the mounting portion 110 is used for installing the lens 200, and the positioning structure 111 is arranged on the mounting portion 110, and the positioning structure 111 can extend along a second direction (i.e. the y direction in the figure). The first direction can be arranged perpendicularly to the second direction, or the first direction can form an included angle with the second direction, and the included angle is greater than 0 degrees.

[0054] The first direction can be arranged parallel to the axial direction of the lens 200 and the mounting barrel 100, and the first direction can be arranged perpendicularly to the second direction, i.e. the second direction can be perpendicular to the axial direction of the lens 200 and the mounting barrel 100.

[0055] Reference Figure 2 and Figure 3 For example, the lens 200 may include a lens body 210 and at least one limiting structure 220 connected to each other. The lens body 210 is disposed in the mounting portion 110, and a first gap 300 is formed between the lens body 210 and the side wall of the mounting portion 110. Each limiting structure 220 is connected to a positioning structure 111, and a second gap 400 is formed between the limiting structure 220 and the corresponding positioning structure 111. The width of the second gap 400 is smaller than the width of the first gap 300.

[0056] Reference Figure 2 and Figure 5 It is easy to understand that in the cooperating positioning structure 111 and limiting structure 220, the positioning structure 111 can be set as a concave positioning structure 111, and the limiting structure 220 can be set as a convex limiting structure 220, so that the convex limiting structure 220 can be inserted into the concave positioning structure 111, so that the lens body 210 is relatively fixed in the mounting part 110 of the mounting cylinder 100 through the concave positioning structure 111 and the convex limiting structure 220.

[0057] Or, refer to Figure 3 and Figure 5 In the matching positioning structure 111 and limiting structure 220, the positioning structure 111 can be configured as a convex positioning structure 111, and the limiting structure 220 can be configured as a concave limiting structure 220, so that the convex positioning structure 111 can be inserted into the concave limiting structure 220, so that the lens body 210 is relatively fixed in the mounting part 110 of the mounting cylinder 100 through the convex positioning structure 111 and the concave limiting structure 220, thereby realizing the fixation of the lens 200 and the mounting cylinder 100.

[0058] In some possible implementations, the lens body 210 can be configured as a concave lens body 210 or a planar lens body 210. The lens body 210 can also be configured as a convex lens body 210, and the lens body 210 can protrude toward the end of the mounting cylinder 100, that is, the protruding surface of the lens body 210 can be away from the functional element 500 inside the mounting cylinder 100; or, the lens body 210 can also protrude toward the inside of the mounting cylinder 100, that is, the protruding surface of the lens body 210 can be toward the functional element 500 inside the mounting cylinder 100, so that the functional element 500 located inside the mounting cylinder 100 can obtain a larger imaging angle through the convex lens body 210.

[0059] For example, the material of the lens 200 can be plastic or glass, etc. In a plane perpendicular to the first direction, the lens body 210 can be a square lens body 210 or a round lens body 210. Alternatively, the shape of the lens body 210 can be adjusted according to the size and installation position of the mounting cylinder 100.

[0060] In the mating mounting cylinder 100 and lens 200, the number of positioning structures 111 and the number of limiting structures 220 can be set to multiple. Multiple limiting structures 220 and multiple positioning structures 111 are set in a one-to-one correspondence so that the limiting structure 220 can be used in conjunction with the corresponding positioning structure 111 to achieve the limiting between the lens 200 and the mounting cylinder 100.

[0061] It should be noted that the number of positioning structures 111 and the number of limiting structures 220 can be adjusted according to the shape of the limiting structures 220 and the lens body 210, as well as the size of the limiting structures 220 and the lens body 210; and, the more positioning structures 111 and the more limiting structures 220 there are, the more stable the connection between the lens 200 and the mounting cylinder 100, and the less likely the lens 200 is to rotate around the central axis within the mounting cylinder 100.

[0062] Reference Figures 6-10 For example, the lens body 210 may include at least one arcuate portion 211 and at least one planar portion 212 connected to each other. For instance, the lens body 210 may include two arcuate portions 211 and two planar portions 212, wherein the two arcuate portions 211 and the two planar portions 212 may be arranged alternately in sequence, each arcuate portion 211 is connected to two planar portions 212, each planar portion 212 is connected to two arcuate portions 211, the two planar portions 212 are arranged in parallel opposite directions, the two arcuate portions 211 are arranged opposite to each other, and both arcuate portions 211 protrude in a direction away from each other.

[0063] The central axes of the two arc-shaped portions 211 can be set to coincide, and the central axis of the arc-shaped portion 211 can extend along the first direction. The distance between the central axis of the arc-shaped portion 211 and the central axis of the mounting cylinder 100 can be less than or equal to 0.4 mm, so as to improve the coaxiality between the lens body 210 and the mounting cylinder 100.

[0064] By configuring the lens body 210 to include two arc-shaped portions 211 and two flat portions 212 arranged alternately, the flat portions 212 and arc-shaped portions 211 can play a certain positioning and limiting role for the lens 200, making the installation of the lens 200 more convenient and reducing the possibility of the lens 200 rotating around the central axis of the mounting cylinder 100.

[0065] For example, at least a portion of the limiting structure 220 may be provided on the arc-shaped portion 211, and / or at least a portion of the limiting structure 220 may be provided on the planar portion 212, and the second direction may be parallel to the radial direction of the arc-shaped portion 211, that is, the extension direction of the limiting structure 220 may be parallel to the radial direction of the arc-shaped portion 211, so as to reduce the possibility of the lens body 210 rotating around the central axis in the mounting portion 110 by cooperating with the limiting structure 220 and the positioning structure 111.

[0066] Reference Figures 6-8 When the number of limiting structures 220 is set to multiple, the first part of the limiting structure 220 can be set in one of the arc-shaped portions 211, and the second part of the limiting structure 220 can be set in another arc-shaped portion 211; the number of the first parts of the limiting structure 220 can be equal to the number of the second parts of the limiting structure 220, and the first parts and the second parts of the limiting structure 220 can be centrally symmetrical with respect to the central axis of the arc-shaped portion 211.

[0067] Or, refer to Figure 9 The first part and the second part of the limiting structure 220 can also be symmetrically arranged with respect to the central axis of the planar part 212 to improve the stability of the connection between the lens body 210 and the mounting cylinder 100.

[0068] For example, the number of the first part of the limiting structure 220 and the number of the second part of the limiting structure 220 are both set to one or two. When the number of the first part of the limiting structure 220 and the number of the second part of the limiting structure 220 are both set to two, in the first part of the limiting structure 220, the two limiting structures 220 can be arranged in a direction perpendicular to the plane portion 212, and in the second part of the limiting structure 220, the two limiting structures 220 can be arranged in a direction perpendicular to the plane portion 212.

[0069] It is easy to understand that when the lens body 210 of the lens 200 is located in the mounting part 110, the lens body 210 can rotate around the central axis of the arc part 211 within the mounting part 110 because the central axes of the two arc parts 211 are set to coincide. This causes the lens body 210 of the lens 200 to shift, affecting the stability of the connection between the lens and the mounting tube 100.

[0070] By setting the second direction parallel to the radial direction of the arc-shaped portion 211, the limiting structure 220 can cooperate with the corresponding positioning structure 111, thereby the limiting structure 220 plays a certain radial positioning role for the lens body 210, reducing the possibility of the lens body 210 rotating around the central axis of the arc-shaped portion 211 within the mounting portion 110, and making the connection between the lens and the mounting tube 100 more stable.

[0071] Alternatively, in the first and second parts of the limiting structure 220, the second direction can also be arranged parallel to the plane 212, that is, both the first and second parts of the limiting structure 220 can be arranged parallel to the plane 212, and the first and second parts of the limiting structure 220 can be arranged symmetrically with respect to the central axis of the plane 212 to improve the stability of the connection between the lens body 210 and the mounting cylinder 100.

[0072] For example, the plurality of limiting structures 220 may further include a third portion, which may be disposed on one of the planar portions 212, or the third portion of the limiting structure 220 may be evenly disposed on two planar portions 212.

[0073] For example, the number of third parts of the limiting structure 220 can be set to one or more. When the number of third parts of the limiting structure 220 is set to one, the third part of the limiting structure 220 can be set on one of the planar parts 212. When the number of third parts of the limiting structure 220 is set to multiple, all the third parts of the limiting structure 220 can be set on one of the planar parts 212, or the third parts of the limiting structure 220 can be evenly set on two planar parts 212.

[0074] By adopting the above technical solution, when the lens 200 is installed in the mounting cylinder 100, the lens body 210 of the lens 200 can be placed in the mounting part 110, so that multiple limiting structures 220 can be correspondingly set in the corresponding positioning structures 111. Thus, the multiple limiting structures 220 and multiple positioning structures 111 play a certain positioning role in the installation process of the lens 200, making the installation process of the lens 200 more convenient.

[0075] Furthermore, by connecting multiple limiting structures 220 to the lens body 210 of the lens 200, when the lens body 210 is installed in the mounting part 110, the limiting structures 220 can cooperate with the corresponding positioning structures 111, thereby reducing the possibility of the lens body 210 of the lens 200 rotating around the first direction in the mounting part 110, making the connection between the lens body 210 of the lens 200 and the mounting cylinder 100 more stable.

[0076] Reference Figures 12-15 In some possible implementations, the width X of the first gap 300 satisfies the following formula:

[0077] X=(CTE1-CTE2)×D1×ΔT≥0.002mm;

[0078] Wherein, CTE1 is the coefficient of thermal expansion of lens 200, CTE2 is the coefficient of thermal expansion of mounting tube 100, D1 is the outer diameter of lens 200, and ΔT is the temperature difference between the operating temperature and the initial temperature of the lens assembly.

[0079] The dimension of the first gap of 300 can satisfy the following formula:

[0080] 0.008 ≥ X / D1 ≥ 0.0004;

[0081] Where X is the width of the first gap 300, and D1 is the outer diameter of the lens 200.

[0082] It should be noted that when the first gap 300 exceeds the maximum range, the mating gap between the lens 200 and the mounting cylinder 100 is too large, which may lead to risks such as dust entering the lens 200, light leakage, and shaking during assembly. At the same time, at low temperatures, the expansion difference between the lens 200 and the mounting cylinder 100 is too large, and the tensile force on the adhesive is too great, which may cause the adhesive to crack, or even cause the adhesive to tear the lens 200 or the mounting cylinder 100.

[0083] When the first gap 300 is lower than the minimum range, it will cause the gap between the lens 200 and the mounting cylinder 100 to be too small. Under high temperature, the expansion difference between the lens 200 and the mounting cylinder 100 will be too large. The lens 200 will be subjected to too much extrusion force from the mounting cylinder 100, resulting in serious changes in the surface shape of the lens 200, and even the risk of the lens 200 or the mounting cylinder 100 breaking.

[0084] The dimensions of the first gap, 300, can satisfy the following formula:

[0085] 0.008≥X / D1=(CTE1-CTE2)×ΔT≥0.0004;

[0086] Wherein, CTE1 is the coefficient of thermal expansion of lens 200, CTE2 is the coefficient of thermal expansion of mounting tube 100, D1 is the outer diameter of lens 200, and ΔT is the temperature difference between the operating temperature and the initial temperature of the lens assembly.

[0087] In the cooperating positioning structure 111 and limiting structure 220, the width of the first gap 300 is greater than or equal to 0.002 mm and less than or equal to 0.8 mm. For example, the width of the first gap 300 can be set to one of 0.002 mm, 0.02 mm, 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm and 0.25 mm. The width of the first gap 300 can be adjusted according to the size of the lens body 210. This application embodiment does not further limit this.

[0088] And / or, the width of the second gap 400 is less than or equal to 0.2 mm. For example, the width of the second gap 400 can be set to one of 0.001 mm, 0.01 mm, 0.03 mm, 0.08 mm, 0.12 mm, 0.15 mm and 0.2 mm. Furthermore, the width of the second gap 400 can be adjusted according to the width of the first gap 300 and the expansion coefficient of the lens body 210 and the limiting structure 220 to reduce the possibility of the lens body 210 contacting and being squeezed with the side wall of the mounting portion 110.

[0089] The dimension of the second gap 400 can satisfy the following formula:

[0090] 0.08≥A / W1=(CTE1-CTE2)×ΔT≥0

[0091] Where A is the width of the second gap 400, W1 is the width of the convex limiting structure 220, CTE1 is the thermal expansion coefficient of the lens 200, CTE2 is the thermal expansion coefficient of the mounting cylinder 100, and ΔT is the temperature difference between the lens assembly's operating temperature and its initial temperature.

[0092] If the second gap 400 is too large, it will cause the lens 200 to be too eccentric and the resolution of the lens 200 to be poor. If the second gap 400 is too small, the expansion difference between the convex limiting structure 220 and the concave positioning structure 111 will be too large at high or low temperatures. The convex limiting structure 220 will be subjected to too much compressive force from the concave positioning structure 111, which will cause stress concentration in the convex limiting structure 220 and risk of breakage.

[0093] The second gap 400 compensates for the expansion difference between the convex limiting structure 220 and the concave positioning structure 111 under high temperature, so that it is not squeezed at high and low temperatures and will not break, thus avoiding stray light or reduced resolution of the lens 200.

[0094] It should be noted that the width of the second gap 400 is smaller than the width of the first gap 300. When the width of the first gap 300 is set to 0.002 mm, the width of the second gap 400 can be set to 0.001 mm accordingly; when the width of the second gap 400 is set to 0.2 mm, the width of the first gap 300 can be set to 0.25 mm accordingly, so that the width of the second gap 400 is smaller than the width of the first gap 300.

[0095] By adopting the above technical solution, compared with the lens assembly being in a normal temperature environment, when the ambient temperature of the lens assembly rises, the lens body 210 and the limiting structure 220 expand due to heat. The first gap 300 between the lens body 210 and the side wall of the mounting part 110 decreases, and the second gap 400 between the limiting structure 220 and the corresponding positioning structure 111 decreases. Since the width of the second gap 400 is smaller than the width of the first gap 300, the limiting structure 220 can first tightly abut against the positioning structure 111, thereby reducing the possibility of the lens body 210 and the side wall of the mounting part 110 coming into contact with each other, reducing the possibility of the lens body 210 being squeezed and deformed, and improving the imaging clarity of the lens 200.

[0096] It should be noted that when the ambient temperature of the lens assembly increases, the first gap 300 between the lens body 210 and the side wall of the mounting part 110 decreases. The first gap 300 can be set to be greater than or equal to 0 to reduce the possibility of the lens body 210 and the side wall of the mounting part 110 coming into contact with each other. The size of the first gap 300 can be determined according to the ambient temperature and the coefficient of thermal expansion of the lens body 210. This application embodiment does not impose further limitations on this.

[0097] The size of the second gap 400 can be set to the width of the minimum gap between the limiting structure 220 and the corresponding positioning structure 111. When the gap between the limiting structure 220 and the corresponding positioning structure 111 is uneven, the width of the second gap 400 is less than the width of the first gap 300, and the width of a portion of the gap between the limiting structure 220 and the corresponding positioning structure 111 can be greater than or equal to the width of the first gap 300. That is, when the ambient temperature of the lens assembly rises, the limiting structure 220 and the corresponding positioning structure 111 can abut tightly, thereby fixing the lens 200 relatively in the mounting part 110.

[0098] For example, the positional tolerance between the mounting part 110 and the positioning structure 111 can be set to be greater than or equal to -0.2 mm and less than or equal to 0.2 mm; and / or, the positional tolerance between the limiting structure 220 and the lens body 210 can be set to be greater than or equal to -0.2 mm and less than or equal to 0.2 mm.

[0099] For example, the positional tolerance between the mounting part 110 and the positioning structure 111 can be set to one of -0.2 mm, -0.1 mm, 0, 0.1 mm and 0.2 mm, and the positional tolerance between the limiting structure 220 and the lens body 210 can be set to one of -0.2 mm, -0.1 mm, 0, 0.1 mm and 0.2 mm, so as to improve the positional accuracy of the connection between the lens 200 and the mounting cylinder 100 and ensure that the width of the second gap 400 is smaller than the width of the first gap 300.

[0100] For example, the eccentric configuration of the main body 210 is: P = A + B + C; where P is the eccentricity of the main body 200; A is the gap between the main body 200 and the side wall of the mounting part 110; B is the positional degree between the center of the limiting structure 220 and the center of the main body 210; and C is the positional degree between the center of the limiting structure 220 and the mounting cylinder 100.

[0101] In some possible implementations, in the cooperating positioning structure 111 and limiting structure 220, the positioning structure 111 can be configured as a concave positioning structure 111, and the limiting structure 220 can be configured as a convex limiting structure 220.

[0102] For example, at least part of the limiting structure 220 can be set as a rectangular limiting structure 220, and at least part of the positioning structure 111 can be set as a rectangular positioning structure 111, with the rectangular positioning structure 111 and the rectangular limiting structure 220 being set in a one-to-one correspondence.

[0103] Reference Figures 12-15 For example, in the rectangular limiting structure 220, the rectangular limiting structure 220 has two first abutting surfaces 221 and one second abutting surface 222. The two first abutting surfaces 221 can be arranged in parallel opposite to each other. The first abutting surfaces 221 extend along the second direction. The side of the two first abutting surfaces 221 that is away from the outer surface of the lens body 210 is connected by the second abutting surface 222. The second abutting surface 222 can be perpendicular to the second direction.

[0104] Between the matching rectangular limiting structure 220 and rectangular positioning structure 111, the gap between the first abutting surface 221 and the rectangular positioning structure 111 can form a second gap 400, the width of the second gap 400 can be less than or equal to the gap width between the second abutting surface 222 and the rectangular positioning structure 111.

[0105] It is easy to understand that when the lens body 210 of the lens 200 rotates in the mounting part 110 around the first direction, the first contact surface 221 of the rectangular limiting structure 220 can contact the side wall of the rectangular positioning structure 111, so that the rectangular limiting structure 220 can cooperate with the rectangular positioning structure 111 to reduce the possibility of the lens body 210 of the lens 200 moving.

[0106] Furthermore, the width of the second gap 400 can be less than or equal to the width of the gap between the second abutment surface 222 and the rectangular positioning structure 111. When the ambient temperature of the lens assembly rises, the lens body 210 and the rectangular limiting structure 220 expand due to heat. The first abutment surface 221 of the rectangular limiting structure 220 can first contact the side wall of the rectangular positioning structure 111. By setting the gap between the first abutment surface 221 and the rectangular positioning structure 111 as the second gap 400, the possibility of compression between the first abutment surface 221 and the rectangular positioning structure 111 can be reduced, thus reducing the possibility of breakage or even detachment between the rectangular limiting structure 220 and the lens body 210.

[0107] It should be noted that, referring to Figure 11 The width of the second gap 400 is set as the distance between the first abutment surface 221 of the rectangular limiting structure 220 and the side wall of the rectangular positioning structure 111. When the lens body 210 of the lens 200 rotates in the mounting part 110 around the first direction, one of the first abutment surfaces 221 of the rectangular limiting structure 220 contacts the side wall of the rectangular positioning structure 111. The distance between the other first abutment surface 221 of the rectangular limiting structure 220 and the side wall of the rectangular positioning structure 111 should be equal to twice the second gap 400 to ensure the stability of the connection between the lens 200 and the mounting cylinder 100.

[0108] It should be noted that between the matching rectangular limiting structure 220 and rectangular positioning structure 111, the rectangular limiting structure 220 and rectangular positioning structure 111 can play a radial positioning role for the lens 200, so as to reduce the possibility of the lens 200 rotating around the rotation axis in the mounting part 110 and increase the stability of the lens 200 in the mounting part 110.

[0109] For example, the lens body 210 includes two arc-shaped portions 211 and two flat portions 212, wherein the two arc-shaped portions 211 and the two flat portions 212 are alternately arranged in sequence; the number of rectangular limiting structures 220 and the number of rectangular positioning structures 111 can both be set to at least three. When the number of rectangular limiting structures 220 is set to three, two rectangular limiting structures 220 can be respectively arranged on two arc-shaped portions 211, and the other rectangular limiting structure 220 can be arranged on one of the flat portions 212, so as to improve the stability of the lens 200 through multiple limiting structures 220.

[0110] In some possible implementations, in the cooperating positioning structure 111 and limiting structure 220, at least part of the limiting structure 220 can be configured as a trapezoidal limiting structure 220, which has two first abutting surfaces 221 and one second abutting surface 222. The positioning structure 111 can be correspondingly configured as a trapezoidal positioning structure 111, and the trapezoidal positioning structure 111 and the trapezoidal limiting structure 220 are configured in a one-to-one correspondence.

[0111] For example, the two first abutting surfaces 221 can be symmetrically arranged relative to the second direction. The two first abutting surfaces 221 approach each other along the direction away from the outer surface of the lens body 210. The side of the two first abutting surfaces 221 away from the outer surface of the lens body 210 is connected by a second abutting surface 222, which is perpendicular to the second direction.

[0112] Between the matching trapezoidal limiting structure 220 and trapezoidal positioning structure 111, the gap between the first abutting surface 221 of the trapezoidal limiting structure 220 and the trapezoidal positioning structure 111 forms a second gap 400, the width of the second gap 400 being less than or equal to the width of the gap between the second abutting surface 222 of the trapezoidal limiting structure 220 and the trapezoidal positioning structure 111.

[0113] It is easy to understand that when the lens body 210 of the lens 200 rotates in the mounting part 110 around the first direction, the first contact surface 221 of the trapezoidal limiting structure 220 can contact the side wall of the trapezoidal positioning structure 111, so that the trapezoidal limiting structure 220 can cooperate with the trapezoidal positioning structure 111 to reduce the possibility of movement of the lens body 210 of the lens 200.

[0114] Furthermore, the width of the second gap 400 can be less than or equal to the width of the gap between the second abutment surface 222 and the trapezoidal positioning structure 111. When the ambient temperature of the lens assembly rises, the lens body 210 and the trapezoidal limiting structure 220 expand due to heat. The first abutment surface 221 of the trapezoidal limiting structure 220 can first contact the side wall of the trapezoidal positioning structure 111. By setting the gap between the first abutment surface 221 and the trapezoidal positioning structure 111 as the second gap 400, the possibility of compression between the first abutment surface 221 and the trapezoidal positioning structure 111, which could lead to breakage or even detachment between the trapezoidal limiting structure 220 and the lens body 210, can be reduced.

[0115] It should be noted that the width of the second gap 400 is set as the distance between the first contact surface 221 of the trapezoidal limiting structure 220 and the side wall of the trapezoidal positioning structure 111. When the lens body 210 of the lens 200 rotates in the mounting part 110 around the first direction, one of the first contact surfaces 221 of the trapezoidal limiting structure 220 contacts the side wall of the trapezoidal positioning structure 111, and the distance between the other first contact surface 221 of the trapezoidal limiting structure 220 and the side wall of the trapezoidal positioning structure 111 should be equal to twice the second gap 400, so as to ensure the stability of the connection between the lens 200 and the mounting cylinder 100.

[0116] In the trapezoidal limiting structure 220, the first abutting surface 221 is set as an arc-shaped surface or a plane; and / or, the second abutting surface 222 is set as an arc-shaped surface or a plane. This application embodiment does not impose further restrictions on this, as long as the stability of the connection between the trapezoidal limiting structure 220 and the trapezoidal positioning structure 111 can be guaranteed.

[0117] It is easy to understand that among the multiple limiting structures 220, some limiting structures 220 can be set as rectangular limiting structures 220, and some limiting structures 220 can be set as trapezoidal limiting structures 220; correspondingly, among the multiple positioning structures 111, some positioning structures 111 can be set as rectangular positioning structures 111, and some positioning structures 111 can be set as trapezoidal positioning structures 111. The rectangular positioning structures 111 and the rectangular limiting structures 220 are set in a one-to-one correspondence, and the trapezoidal positioning structures 111 and the trapezoidal limiting structures 220 are set in a one-to-one correspondence.

[0118] Furthermore, the lens body 210 includes two arc-shaped portions 211 and two flat portions 212, wherein the two arc-shaped portions 211 and the two flat portions 212 are alternately arranged in sequence; the limiting structure 220 is set as a trapezoidal limiting structure 220, and the positioning structure 111 is correspondingly set as a trapezoidal positioning structure 111. The number of trapezoidal limiting structures 220 and the number of trapezoidal positioning structures 111 can both be set to at least two. When the number of trapezoidal limiting structures 220 is set to two, the two trapezoidal limiting structures 220 can be respectively set on the two arc-shaped portions 211, or the two trapezoidal limiting structures 220 can be respectively set on the two flat portions 212.

[0119] It is worth mentioning that the two second contact surfaces 222 of the trapezoidal limiting structure 220 form an included angle, so that the two second contact surfaces 222 cooperate to limit the movement of the trapezoidal limiting structure 220 in multiple directions. Thus, the limiting of the lens body 210 can be achieved by using only two trapezoidal limiting structures 220.

[0120] It is easy to understand that the limiting structure 220 and the positioning structure 111 can also be set to other shapes such as arc, pentagon and ellipse, so that the limiting structure 220 can closely abut against the corresponding positioning structure 111. Furthermore, when the limiting structure 220 is set to a pentagon or other polygon, the limiting structure 220 can contact the corresponding positioning structure 111 from multiple angles, thereby reducing the possibility of the lens 200 moving within the mounting portion 110.

[0121] In some possible implementations, the extension direction of the limiting structure 220 may pass through the center of the main body 210; the number of limiting structures 220 is set to three, the number of the first part of the limiting structure 220 is set to one, the number of the second part of the limiting structure 220 is set to one, the number of the third part of the limiting structure 220 is set to one, and the extension direction of the first part of the limiting structure 220 is perpendicular to the extension direction of the third part of the limiting structure 220.

[0122] Alternatively, the extension direction of the limiting structure 220 passes through the center of the main body 210. The number of limiting structures 220 can also be set to two, with one limiting structure 220 located in the arc-shaped part 211 and the other limiting structure 220 located in the planar part 212, and the center line of one limiting structure 220 being perpendicular to the center line of the other limiting structure 220.

[0123] Alternatively, the third part of the limiting structure 220 extends through the center of the main body 210, the extension direction of the first part of the limiting structure 220 is on the same straight line as the extension direction of the second part of the limiting structure 220, and the extension direction of the first part of the limiting structure 220 is perpendicular to the extension direction of the third part of the limiting structure 220.

[0124] The limiting structure 220 is rectangular or U-shaped, and all limiting structures 220 have the same shape; the number of limiting structures 220 is three. Alternatively, the limiting structure 220 is rectangular or U-shaped, and at least one limiting structure 220 has a different shape than the other limiting structures 220; the number of limiting structures 220 is three. Alternatively, the limiting structure 220 is rectangular or cylindrical, and at least one limiting structure 220 has a different shape than the other limiting structures 220; the number of limiting structures 220 is three.

[0125] The limiting structure 220 is configured to be arc-shaped or trapezoidal, and the number of limiting structures 220 is set to two. Alternatively, at least one limiting structure 220 is configured to be arc-shaped or trapezoidal, and the number of limiting structures 220 is set to two. Alternatively, the limiting structure 220 is configured to be arc-shaped or polygonal, and the shape of at least one limiting structure 220 is different from the shapes of the other limiting structures 220, and the number of limiting structures 220 is set to two.

[0126] In some possible implementations, in the first direction, the thickness of the convex limiting structure 220 can be greater than or equal to 0.1 mm and less than or equal to 10 mm; in the second direction, the length of the convex limiting structure 220 can be greater than or equal to 0.1 mm and less than or equal to 5 mm; in the direction perpendicular to the first and second directions, the minimum width of the convex limiting structure 220 is greater than or equal to 0.1 mm and less than or equal to 10 mm.

[0127] For example, the thickness, length and width of the convex limiting structure 220 can be adjusted according to the actual situation. For example, the thickness, length and width of the convex limiting structure 220 can be limited according to the size of the lens body 210 and the connection method of the convex limiting structure 220 and the concave positioning structure 111.

[0128] The dimensions of the convex limiting structure 220 can satisfy the following formula:

[0129] H×L=K[(W1×CTE1×△T+W1)-(W2×CTE2×△T+W2)] / [σ2]≥0.01mm 2 ;

[0130] Wherein, K is the elastic coefficient of the convex limiting structure, σ2 is the theoretical compressive stress of the convex limiting structure, L is the length of the convex limiting structure 220, H is the thickness of the convex limiting structure 220, CTE1 is the thermal expansion coefficient of the lens 200, CTE2 is the thermal expansion coefficient of the mounting cylinder 100, W1 is the width of the convex limiting structure 200, W2 is the depth of the concave positioning structure 111, and ΔT is the temperature difference between the lens assembly's operating temperature and its initial temperature.

[0131] In some possible implementations, in the first direction, the thickness of the convex positioning structure 111 can be greater than or equal to 0.1 mm and less than or equal to 10 mm; in the second direction, the length of the convex positioning structure 111 can be greater than or equal to 0.1 mm and less than or equal to 5 mm; in the direction perpendicular to the first and second directions, the minimum width of the convex positioning structure 111 is greater than or equal to 0.1 mm and less than or equal to 10 mm.

[0132] For example, the thickness, length and width of the convex positioning structure 111 can be adjusted according to the actual situation. For example, the thickness, length and width of the convex positioning structure 111 can be limited according to the size of the lens body 210 and the connection method of the convex positioning structure 111 and the concave limiting structure 220.

[0133] The dimensions of the convex positioning structure 111 can satisfy the following formula:

[0134] H×L=K[(W1×CTE1×△T+W1)-(W2×CTE2×△T+W2)] / [σ2]≥0.01mm 2 ;

[0135] Wherein, K is the elastic coefficient of the convex limiting structure, σ2 is the theoretical compressive stress of the convex positioning structure 111, L is the length of the convex positioning structure 111, H is the thickness of the convex positioning structure 111, CTE1 is the thermal expansion coefficient of the lens 200, CTE2 is the thermal expansion coefficient of the mounting cylinder 100, W1 is the width of the convex positioning structure 111, W2 is the depth of the concave limiting structure 220, and ΔT is the temperature difference between the lens assembly's operating temperature and its initial temperature.

[0136] In some possible implementations, the dimensions of the convex limiting structure 220 can satisfy the following formula:

[0137] E / D3 ≥ 0.0004;

[0138] Where E is the gap between the end face of the convex limiting structure 220 and the concave positioning structure 111 in the second direction, and D3 is the distance between the end face of the convex limiting structure 220 and the center of the lens body 210.

[0139] When the gap E between the end face of the convex limiting structure 220 and the concave positioning structure 111 is lower than the minimum range, it will cause the gap between the lens 200 and the mounting cylinder 100 to be too small. Under high and low temperatures, the expansion difference between the convex limiting structure 220 and the concave positioning structure 111 will be too large, and the edge of the convex limiting structure 220 will be squeezed, resulting in stress concentration and cracking.

[0140] The gap E between the end face of the convex limiting structure 220 and the concave positioning structure 111 has no upper limit. It is even possible to open up the concave positioning structure 111, so that the gap E between the end face of the convex limiting structure 220 and the concave positioning structure 111 approaches infinity.

[0141] By controlling the gap E between the end face of the convex limiting structure 220 and the concave positioning structure 111, the convex limiting structure 220 can be prevented from being squeezed by the concave positioning structure 111 under high and low temperatures, thus ensuring the reliability of the convex limiting structure 220.

[0142] By compensating for the expansion difference between the convex limiting structure 220 and the concave positioning structure 111 under high temperature with a large gap, the convex limiting structure 220 is not squeezed under high and low temperatures and will not break, thus avoiding stray light or reduced resolution in the lens 200.

[0143] The dimensions of the convex limiting structure 220 can satisfy the following formula:

[0144] 0.25≥d1 / D1≥0.01;

[0145] 0.25≥d2 / D1≥0.01;

[0146] Wherein, d1 is the distance between the outer edge of the convex limiting structure 220 and the central axis of the lens body 210, d2 is the distance between the inner edge of the convex limiting structure 220 and the central axis of the lens body 210, and D1 is the outer diameter of the lens body 210.

[0147] The outer edge of the convex limiting structure 220 is the edge of the convex limiting structure 220 that is far away from the central axis of the lens body 210, and the inner edge of the convex limiting structure 220 is the edge of the convex limiting structure 220 that is close to the central axis of the lens body 210.

[0148] If d1 and d2 exceed the maximum range, the accuracy of the convex limiting structure 220 and the concave positioning structure 111 will be relatively poor, and the gap A between the convex limiting structure 220 and the concave positioning structure 111 will increase, resulting in a large eccentricity of the lens 200 and poor resolution of the lens 200.

[0149] If d1 and d2 are below the minimum range, the strength difference of the convex limiting structure 220 will cause it to break under high and low temperatures due to the expansion difference.

[0150] By compensating for the expansion difference between the mounting cylinder and the lens 200 under high temperature with a large gap, the plastic lens 200 is not squeezed under high temperature, its surface shape is stable, and the eccentricity of the lens 200 is relatively small, resulting in good resolution of the lens 200 under high temperature.

[0151] By controlling the distance d1 between the outer edge of the convex limiting structure 220 and the central axis of the lens body 210 and the distance d2 between the inner edge of the convex limiting structure 2220 and the central axis of the lens body 210, it is possible to ensure that the lens 200 is not squeezed at high temperatures and to limit the eccentricity of the lens 200.

[0152] Furthermore, when the convex limiting structure 220 is engaged with the corresponding concave positioning structure 111, a point bearing can be formed between the convex limiting structure 220 and the concave positioning structure 111, thereby reducing the friction between the convex limiting structure 220 and the concave positioning structure 111, reducing the possibility of jamming between the convex limiting structure 220 and the concave positioning structure 111, and making the disassembly and assembly process between the convex limiting structure 220 and the concave positioning structure 111 more convenient.

[0153] When installing the lens 200 into the mounting cylinder 100, an adhesive layer can be applied to the bottom surface and side wall of the mounting part 110 first, and then the lens body 210 of the lens 200 can be placed in the mounting part 110 so that the lens body 210 of the lens 200 can come into contact with the adhesive layer, thereby fixing the lens body 210 of the lens 200 to the mounting cylinder 100.

[0154] The shape of the limiting structure 220 is set to one of the following: arc, polygon, U-shape, double arc, cylinder and ellipse. When the shape of the limiting structure 220 is set to a polygon, the shape of the limiting structure 220 can be set to a rectangle or trapezoid, etc. The embodiments of this application do not impose further restrictions on this.

[0155] For example, refer to Figure 16 and Figure 17 The shape of the limiting structure 220 can be set to U-shape, and the positioning structure 111 can be set to U-shape accordingly.

[0156] It should be noted that among the multiple limiting structures 220, the shape of some limiting structures 220 can be different from that of the remaining limiting structures 220. For example, some limiting structures 220 can be set as rectangular limiting structures 220, and the remaining limiting structures 220 can be set as trapezoidal limiting structures 220. This allows the limiting structures 220 of different shapes to limit the lens 200 at different angles, thereby further improving the fixing effect of the limiting structures 200 on the lens body 210 of the lens 200.

[0157] The following settings assume an ambient temperature of 95 degrees Celsius, an assembly temperature of 25 degrees Celsius, and a temperature difference of 75 degrees Celsius between the ambient and assembly temperatures. The mounting cylinder 100 is made of Bulk Molding Compound (BMC), has a diameter of 58 mm, and a coefficient of thermal expansion of 2.5 × 10⁻⁶. -5 / ℃; and taking a lens 200 with a diameter of 52 mm as an example, the material of the lens 200 is polymethyl methacrylate (PMMA), and the coefficient of thermal expansion of the lens 200 is 8×10. -5 The design process of lens 200 is described using / ℃ as an example.

[0158] In a plane perpendicular to the first direction, the expansion amount of lens 200 is G1 = 0.2912 mm, the expansion amount of mounting cylinder 100 is G2 = 0.1015 mm, and the difference between the expansion amounts of lens 200 and mounting cylinder 100 is G1 - G2 = 0.1897 mm. Therefore, when the first gap 300 is greater than 0.1897 mm, when the ambient temperature rises to 95 degrees Celsius, lens 200 will not contact the inner wall of mounting cylinder 100, thereby reducing the possibility of lens 200 being squeezed and deformed.

[0159] It is easy to understand that the expansion of the lens 200 is positively correlated with the diameter of the lens 200, so that the larger the size of the lens 200, the greater the expansion of the lens 200 under the condition of increased temperature. The embodiments of this application are suitable for using large-size lenses 200 and increasing the width of the first gap 300 to reduce the possibility of mutual compression between the lens 200 and the inner wall of the mounting part 110.

[0160] For example, the parameters of the lens 200 and the mounting tube 100 can be referred to in the table below.

[0161] D1 X d1 d2 A W1 E Example 1 52 0.0208 0.52 0.52 0 3 0.022 Example 2 52 0.208 1.56 1.56 0.02 3 0.22 Example 3 52 0.416 13 13 0.24 3 5.5

[0162] Table 1

[0163]

[0164]

[0165] Table 2

[0166] Wherein, d1 is the distance between the outer edge of the convex limiting structure 220 and the central axis of the lens body 210, d2 is the distance between the inner edge of the convex limiting structure 220 and the central axis of the lens body 210, and D1 is the outer diameter of the lens 200.

[0167] W1 is the width of the convex limiting structure 200, E is the gap between the end face of the convex limiting structure 220 and the concave positioning structure 111 in the second direction; A is the width of the second gap 400, and X is the width of the first gap.

[0168] Reference Figure 21 and Figure 22 ,in, Figure 21 This is a schematic diagram of the force simulation of the lens assembly provided in the embodiments of this application; Figure 22 This is a diagram illustrating the resolving power of the lens assembly provided in this embodiment. As shown, when the parameters of the lens 200 and the mounting cylinder 100 satisfy the above-mentioned relationship, the limiting structure 200 effectively fixes the lens body 210, resulting in a good imaging effect for the lens body 210.

[0169] In some possible embodiments, the lens 200 is further provided with a first constraint portion 230, and the mounting cylinder 100 is provided with a second constraint portion 120, the first constraint portion 230 and the second constraint portion 120 cooperating; in the first constraint portion 230 and the second constraint portion 120, one of the first constraint portion 230 and the second constraint portion 120 can be provided as a convex constraint portion, and the other of the first constraint portion 230 and the second constraint portion 120 can be provided as a concave constraint portion, with the convex constraint portion inserted into the concave constraint portion.

[0170] For example, the first constraint portion 230 is configured as a convex constraint portion, and the second constraint portion 120 is configured as a concave constraint portion; or, the first constraint portion 230 is configured as a concave constraint portion, and the second constraint portion 120 is configured as a convex constraint portion. The first constraint portion 230 and the second constraint portion 120 cooperate to achieve at least part of the effect of the limiting structure 220 and the positioning structure 111, as detailed above. The embodiments of this application will not be repeated here.

[0171] For example, a third gap 600 is provided between the first constraint part 230 and the second constraint part 120. The width of the third gap 600 is greater than the width of the first gap 300 and the width of the second gap 400. Through the mutual cooperation of the first constraint part 230 and the second constraint part 120, the tilt of the lens 200 in the first direction is reduced, and the eccentricity of the lens 200 in the plane parallel to the second direction is reduced, so that the installation of the lens 200 is more stable.

[0172] The dimension of the third gap 600 can satisfy the following formula:

[0173] E / D3 ≥ 0.0004;

[0174] Where E is the gap between the end face of the first constraint part 230 and the second constraint part 120 in the second direction, and D3 is the distance between the end face of the first constraint part 230 and the center of the lens body 210.

[0175] Furthermore, during the installation of the lens 200, the first constraint part 230 and the second constraint part 120 cooperate to provide initial positioning and guidance for the lens 200, making the installation process of the lens 200 more convenient.

[0176] Reference Figure 18 and Figure 19 , among which, Figure 18 In the lens assembly, the lens 200 includes a main body 210, a limiting structure 220, and a first constraint part 120. The limiting structure 220 is configured as a convex limiting structure 220, and the first constraint part 230 is configured as a convex constraint part. The limiting structure 220 and the first constraint part 120 are arranged opposite to each other. The width of the third gap 600 is greater than the width of the first gap 300 and the width of the second gap 400. The limiting structure 220 is configured as a double arc limiting structure 220, and the first constraint part 120 is configured as a double arc constraint part, thereby reducing the tilt of the lens 200 in the first direction and reducing the eccentricity of the lens 200 in the plane parallel to the second direction.

[0177] exist Figure 19In the lens assembly, the lens 200 includes a main body 210, a limiting structure 220, and a first constraint part 120. The limiting structure 220 is a concave limiting structure 220, and the first constraint part 230 is a concave constraint part. The limiting structure 220 and the first constraint part 120 are arranged opposite to each other. The width of the third gap 600 is greater than the width of the first gap 300 and the width of the second gap 400. The limiting structure 220 is a rectangular limiting structure 220, and the first constraint part 120 is a double arc-shaped constraint part. By tangentially engaging the first constraint part 230 and the second constraint part 120, the tilt of the lens 200 in the first direction is reduced, and the eccentricity of the lens 200 in the plane parallel to the second direction is reduced.

[0178] In summary, by configuring the lens 200 to include a lens body 210 and a limiting structure 220, and forming a mounting portion 110 and a positioning structure 111 on the inner surface of the lens, when the lens body 210 is installed in the mounting portion 110, a first gap 300 is formed between the lens body 210 and the side wall of the mounting portion 110, and a second gap 400 is formed between the limiting structure 220 and the corresponding positioning structure 111, so that the lens 200 can be relatively fixed in the mounting portion 110 by the cooperation of the limiting structure 220 and the positioning structure 111.

[0179] When the ambient temperature of the lens assembly rises, the lens body 210 and the limiting structure 220 expand due to heat. The first gap 300 between the lens body 210 and the side wall of the mounting part 110 decreases, and the second gap 400 between the limiting structure 220 and the corresponding positioning structure 111 decreases. Since the width of the second gap 400 is smaller than the width of the first gap 300, the limiting structure 220 first comes into close contact with the positioning structure 111, thereby reducing the possibility of the lens body 210 and the side wall of the mounting part 110 coming into contact with each other, reducing the possibility of the lens body 210 being squeezed and deformed, and improving the imaging clarity of the lens 200.

[0180] This application also provides an electronic device including the lens assembly described in any of the above embodiments. Since the electronic device includes the lens assembly described in any of the above embodiments, the advantages of this electronic device including the lens assembly described in any of the above embodiments are specifically described above and will not be repeated here.

[0181] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0182] In the description of this utility model, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0183] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0184] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lens assembly, characterized in that, Includes mounting tube and lens; The mounting cylinder extends along a first direction, and the lens is disposed inside the mounting cylinder, with the lens and the inner surface of the mounting cylinder having a clearance fit; the inner surface of the mounting cylinder has a mounting portion and at least one positioning structure, and the at least one positioning structure is disposed in the mounting portion; The lens includes a lens body connected to each other and at least one limiting structure. The lens body is disposed in the mounting part, and each of the limiting structures is accommodated and cooperated with a positioning structure.

2. The lens assembly according to claim 1, characterized in that, A first gap is formed between the lens body and the side wall of the mounting part.

3. The lens assembly according to claim 2, characterized in that, A second gap is formed between the limiting structure and the corresponding positioning structure.

4. The lens assembly according to claim 2, characterized in that, The width X of the first gap satisfies the following formula: X=(CTE1-CTE2)×D1×ΔT≥0.002mm; Where CTE1 is the thermal expansion coefficient of the lens, CTE2 is the thermal expansion coefficient of the mounting tube, D1 is the outer diameter of the lens, and ΔT is the temperature difference between the operating temperature and the initial temperature of the lens assembly.

5. The lens assembly according to claim 1, characterized in that, The lens body includes at least one arcuate portion and at least one planar portion connected to each other; At least a portion of the limiting structure is disposed on the arc-shaped portion, and / or at least a portion of the limiting structure is disposed on the planar portion.

6. The lens assembly according to claim 5, characterized in that, The number of the arc-shaped portion and the number of the planar portion are both set to two; The two arc-shaped portions and the two flat portions are arranged alternately in sequence. The two flat portions are arranged in parallel and opposite directions, and the two arc-shaped portions are arranged opposite to each other. Both arc-shaped portions protrude in a direction away from each other.

7. The lens assembly according to claim 5, characterized in that, The central axes of the two arc-shaped portions are aligned, the central axes of the arc-shaped portions extend along the first direction, and the distance between the central axis of the arc-shaped portions and the central axis of the mounting cylinder is less than or equal to 0.4 mm. The positioning structure extends along a second direction, which is parallel to the radial direction of the arcuate portion; The number of limiting structures is set to multiple, with a first part of the limiting structure disposed in one of the arc-shaped portions and a second part of the limiting structure disposed in another arc-shaped portion; the first part and the second part of the limiting structure are symmetrically arranged with respect to the central axis of the arc-shaped portion.

8. The lens assembly according to claim 7, characterized in that, The third part of the limiting structure is disposed on one of the planar portions, or the third part of the limiting structure is evenly disposed on two of the planar portions.

9. The lens assembly according to claim 3, characterized in that, The positioning structure extends along the second direction; At least a portion of the limiting structure is configured as a convex limiting structure, and at least a portion of the positioning structure is configured as a concave positioning structure, wherein the convex limiting structure is at least partially inserted into the corresponding concave positioning structure; In the first direction, the thickness H of the convex limiting structure is greater than or equal to 0.1 mm and less than or equal to 10 mm; in the second direction, the length L of the convex limiting structure is greater than or equal to 0.1 mm and less than or equal to 5 mm; in the direction perpendicular to the first and second directions, the minimum value of the width W1 of the convex limiting structure is greater than or equal to 0.1 mm and less than or equal to 10 mm.

10. The lens assembly according to claim 9, characterized in that, The dimensions of the convex limiting structure satisfy the following formula: H×L=K[ ( W1×CTE1×△T +W1)- (W2 ×CTE2×△T +W2) ] / [σ2]≥0.01mm 2 ; Wherein, K is the elastic coefficient of the convex limiting structure, L is the length of the convex limiting structure, H is the thickness of the convex limiting structure, CTE1 is the thermal expansion coefficient of the lens, CTE2 is the thermal expansion coefficient of the mounting cylinder, W1 is the width of the convex limiting structure, W2 is the depth of the concave positioning structure, ΔT is the temperature difference between the lens assembly's operating temperature and its initial temperature, and σ2 is the theoretical compressive stress of the convex limiting structure.

11. The lens assembly according to claim 9, characterized in that, The size of the first gap satisfies the following formula: 0.008 ≥ X / D1 ≥ 0.0004; Where X is the width of the first gap, and D1 is the outer diameter of the lens body.

12. The lens assembly according to claim 9, characterized in that, In the second direction, the end face of the convex limiting structure and the concave positioning structure are provided with a gap.

13. The lens assembly according to claim 9, characterized in that, The dimensions of the convex limiting structure satisfy the following formula: E / D3 ≥ 0.0004; Where E is the gap between the end face of the convex limiting structure and the concave positioning structure in the second direction, and D3 is the distance between the end face of the convex limiting structure and the center of the lens body.

14. The lens assembly according to claim 9, characterized in that, The dimensions of the convex limiting structure satisfy the following formula: 0.25≥d1 / D1≥0.01; 0.25≥d2 / D1≥0.01; Wherein, d1 is the distance between the outer edge of the convex limiting structure and the central axis of the lens body, d2 is the distance between the inner edge of the convex limiting structure and the central axis of the lens body, and D1 is the outer diameter of the lens body.

15. The lens assembly according to claim 10, characterized in that, The size of the second gap satisfies the following formula: 0.08≥A / W1≥0; Where A is the width of the second gap, and W1 is the width of the convex limiting structure.

16. The lens assembly according to claim 3, characterized in that, The width of the first gap is greater than or equal to 0.002 mm and less than or equal to 0.8 mm, and / or the width of the second gap is less than or equal to 0.2 mm.

17. The lens assembly according to claim 1, characterized in that, The positional tolerance between the mounting part and the positioning structure is greater than or equal to -0.2 mm and less than or equal to 0.2 mm. And / or, the positional tolerance between the limiting structure and the lens body is greater than or equal to -0.2 mm and less than or equal to 0.2 mm.

18. The lens assembly according to claim 2, characterized in that, At least a portion of the limiting structure is configured as a concave limiting structure, and at least a portion of the positioning structure is configured as a convex positioning structure, wherein the convex positioning structure is at least partially inserted into the corresponding concave limiting structure.

19. The lens assembly according to claim 18, characterized in that, The dimensions of the convex positioning structure satisfy the following formula: H×L=K[ ( W1×CTE1×△T +W1)- (W2 ×CTE2×△T +W2) ] / [σ2]≥0.01mm 2 ; Wherein, K is the elastic coefficient of the convex positioning structure, L is the length of the convex positioning structure, H is the thickness of the convex positioning structure, CTE1 is the thermal expansion coefficient of the lens, CTE2 is the thermal expansion coefficient of the mounting cylinder, W1 is the width of the convex positioning structure, W2 is the depth of the concave limiting structure, ΔT is the temperature difference between the lens assembly's operating temperature and its initial temperature, and σ2 is the theoretical compressive stress of the convex positioning structure.

20. The lens assembly according to claim 1, characterized in that, At least a portion of the limiting structure is configured with a shape that is one of the following: arc, polygon, U-shape, double arc, cylindrical and elliptical.

21. The lens assembly according to claim 1, characterized in that, The number of the limiting structures is set to three, and the three limiting structures have the same shape, which is either rectangular or U-shaped; or... The number of limiting structures is set to three, and the shape of at least one of the limiting structures is different from the shapes of the other limiting structures; the shape of the limiting structure is set to rectangular or U-shaped; or... The number of the limiting structures is set to two, and at least one of the limiting structures is set to an arc shape or a trapezoidal shape; or... The number of limiting structures is set to two, and the two limiting structures have different shapes. The shape of the limiting structure is set to arc or polygon.

22. The lens assembly according to claim 3, characterized in that, The positioning structure extends along the second direction; At least part of the limiting structure is configured as a rectangular limiting structure, the rectangular limiting structure having two first abutting surfaces and one second abutting surface; The two first abutting surfaces are arranged in parallel opposite directions, the first abutting surfaces extend along the second direction, and the two first abutting surfaces on the side away from the outer surface of the lens body are connected by the second abutting surface, the second abutting surface being perpendicular to the second direction; The gap between the first abutting surface and the positioning structure forms the second gap, and the width of the second gap is less than or equal to the width of the gap between the second abutting surface and the positioning structure.

23. The lens assembly according to claim 4, characterized in that, Each of the aforementioned limiting structures is configured as a rectangular limiting structure, and the number of the rectangular limiting structures is greater than or equal to three.

24. The lens assembly according to claim 3, characterized in that, The positioning structure extends along the second direction; At least a portion of the limiting structure is configured as a trapezoidal limiting structure, the trapezoidal limiting structure having two first abutting surfaces and one second abutting surface; The two first abutting surfaces are symmetrically arranged with respect to the second direction. The two first abutting surfaces approach each other along the direction away from the outer surface of the lens body. The side of the two first abutting surfaces away from the outer surface of the lens body is connected by the second abutting surface. The second abutting surface is perpendicular to the second direction. The gap between the first abutting surface and the positioning structure forms the second gap, and the width of the second gap is less than or equal to the width of the gap between the second abutting surface and the positioning structure.

25. The lens assembly according to claim 22 or 24, characterized in that, The first abutting surface is set as an arc-shaped surface or a plane; and / or, the second abutting surface is set as an arc-shaped surface or a plane.

26. The lens assembly according to claim 1, characterized in that, The number of the limiting structures is greater than or equal to two.

27. The lens assembly according to claim 8, characterized in that, The extension direction of the limiting structure passes through the center of the main body; The number of limiting structures is set to three, the number of the first part of the limiting structure is set to one, the number of the second part of the limiting structure is set to one, and the number of the third part of the limiting structure is set to one.

28. The lens assembly according to claim 7, characterized in that, The extension direction of the limiting structure passes through the center of the main body; The number of limiting structures is set to two, one of which is located in the arc-shaped part and the other is located in the planar part, with the center line of one limiting structure perpendicular to the center line of the other limiting structure.

29. The lens assembly according to claim 8, characterized in that, The third part of the limiting structure extends through the center of the main body; The extension direction of the first part of the limiting structure is on the same straight line as the extension direction of the second part of the limiting structure, and the extension direction of the first part of the limiting structure is perpendicular to the extension direction of the third part of the limiting structure.

30. The lens assembly according to claim 1, characterized in that, The limiting structure is set to a rectangular or cylindrical shape, at least one of the limiting structures has a different shape from the other limiting structures, and the number of the limiting structures is set to three.

31. The lens assembly according to claim 1, characterized in that, The eccentric configuration of the main body is: P = A + B + C; Wherein, P is the eccentricity of the main body; A is the gap between the main body and the side wall of the mounting part; B is the positional degree between the center of the limiting structure and the center of the main body; and C is the positional degree between the center of the limiting structure and the mounting cylinder.

32. An electronic device, characterized in that, Includes the lens assembly as described in any one of claims 1-31.

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