Imaging lens

Abstract

The present invention provides an imaging lens. The imaging lens comprises: a lens barrel; at least two lenses arranged axially along the lens barrel, the lens barrel having an object-side surface having multiple first snap-fit ​​structures, and the image-side surface having a second snap-fit ​​structure that snaps into engagement with the first snap-fit ​​structures, the first snap-fit ​​structures and the second snap-fit ​​structures being arranged in a one-to-one correspondence; and at least one spacer disposed within the lens barrel and between the two lenses, the spacer having multiple through-holes through which the first snap-fit ​​structure or the second snap-fit ​​structure passes. The present invention solves the problem in prior art imaging lenses of not being able to balance MTF performance with stray light.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an imaging lens. Background Art

[0002] With the rise of full-screen smartphones, global mobile phone manufacturers are placing increasingly high demands on the imaging quality of their products. Camera lenses are developing towards a combination of smaller size, larger image area, and higher pixel count, while also placing increasing demands on lens MTF (Modulation Transfer Function) performance and stray light.

[0003] The lens with the lenses snapped together greatly improves the MTF performance and yield of the lens. However, the snapping of the lenses causes stray light to pass through the snapping parts, causing serious stray light, which in turn affects the imaging quality of the lens.

[0004] In other words, the imaging lens in the prior art has the problem that the MTF performance cannot take into account both the stray light and the image quality. Summary of the Invention

[0005] The main purpose of the present invention is to provide an imaging lens to solve the problem in the prior art that the MTF performance of the imaging lens cannot be balanced with the stray light.

[0006] To achieve the above-mentioned objectives, according to one aspect of the present invention, there is provided an imaging lens, comprising: a lens barrel; at least two lenses, the lenses being spaced apart along the axial direction of the lens barrel, the object-side surface of the optical mechanism area of ​​at least one lens having a plurality of first snap-fitting structures, and the image-side surface of the optical mechanism area of ​​at least another lens having a second snap-fitting structure snapping with the first snap-fitting structure, the first snap-fitting structure and the second snap-fitting structure being arranged in a one-to-one correspondence; and at least one spacer, the spacer being arranged within the lens barrel and between the two lenses, the spacer having a plurality of through holes, through which the first snap-fitting structure or the second snap-fitting structure passes.

[0007] Furthermore, the lens near the image side end of the lens barrel is the image side lens, and the object side surface of the image side lens has a first snap-fit ​​structure; the lens near the object side end of the lens barrel is the object side lens, and the image side surface of the object side lens has a second snap-fit ​​structure; the lens located between the image side lens and the object side lens is the middle lens, the object side surface of the middle lens has the first snap-fit ​​structure, and the image side surface of the middle lens has a second snap-fit ​​structure.

[0008] Furthermore, the projection of the first buckling structure of the middle lens toward the image side is misaligned with the second buckling structure.

[0009] Furthermore, the first buckling structure is a boss, and the second buckling structure is a groove; or the first buckling structure is a groove, and the second buckling structure is a boss.

[0010] Furthermore, the cross-sectional area of ​​the boss in the direction parallel to the lens tends to decrease in the direction away from the lens, and the groove is in a flared shape.

[0011] Furthermore, the side wall of the boss away from the center of the lens serves as the fastening surface of the lens, the fastening surface is tilted relative to the central axis of the boss, and the inclination angle m1 of the fastening surface is greater than or equal to 15 degrees and less than or equal to 20 degrees.

[0012] Furthermore, the side wall of the boss away from the center of the lens serves as a lens draft surface of the lens, the lens draft surface is inclined relative to the central axis of the boss, and the inclination angle m2 of the lens draft surface is greater than 30 degrees.

[0013] Furthermore, the width of the platform of the boss is greater than or equal to 0.01 mm and less than or equal to 0.2 mm.

[0014] Furthermore, the lens and the lens barrel have an interference fit, and the interference fit amount between the lens and the lens barrel is greater than or equal to 1 micron and less than or equal to 3 microns; and / or the lens and the spacer are spaced apart, and the interval m between the lens and the spacer is greater than or equal to 0.003 mm and less than or equal to 0.01 mm.

[0015] Furthermore, the first snap-fitting structure and the second snap-fitting structure have an interference fit, and the interference fit amount between the first snap-fitting structure and the second snap-fitting structure is greater than or equal to 1 micron and less than or equal to 3 microns; and / or the first snap-fitting structure and the second snap-fitting structure overlap, and the overlapping width b between the first snap-fitting structure and the second snap-fitting structure is greater than or equal to 0.04 mm and less than or equal to 0.15 mm.

[0016] Applying the technical solution of the present invention, an imaging lens includes a lens barrel, at least two lenses and at least one spacer, the lenses are arranged at intervals along the axial direction of the lens barrel, the object side surface of the optical mechanism area of ​​at least one lens has multiple first snap-fit ​​structures, and the image side surface of the optical mechanism area of ​​at least another lens has a second snap-fit ​​structure that snaps with the first snap-fit ​​structure, and the first snap-fit ​​structure and the second snap-fit ​​structure are arranged in a one-to-one correspondence; the spacer is arranged in the lens barrel and between the two lenses, and the spacer has multiple through holes, and the first snap-fit ​​structure or the second snap-fit ​​structure passes through the through holes.

[0017] By providing a first snap-fit ​​structure and a second snap-fit ​​structure on the lens, the first snap-fit ​​structure and the second snap-fit ​​structure can be stably snapped together, thereby enabling two adjacent lenses to be stably connected, avoiding the situation where the lenses are installed misaligned, and at the same time greatly improving the MTF performance of the imaging lens and the production yield of the imaging lens. By providing a through hole on the spacer, the first snap-fit ​​structure or the second snap-fit ​​structure can pass through the through hole and snap-fit ​​with the second snap-fit ​​structure or the first snap-fit ​​structure. Since the first snap-fit ​​structure and the second snap-fit ​​structure are located within the through hole, the spacer can block the gap at the snap-fit ​​point between the first snap-fit ​​structure and the second snap-fit ​​structure, reducing the amount of stray light entering the optically effective area, thereby ensuring the imaging quality of the imaging lens and reducing the generation of stray light while ensuring good MTF performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 A schematic diagram showing the overall structure of an imaging lens according to a first embodiment of the present invention is shown; and

[0020] Figure 2 Shown Figure 1 Enlarged view of point P in the middle;

[0021] Figure 3 Shown Figure 1 Middle CC view;

[0022] Figure 4 Shown Figure 1 Middle DD view;

[0023] Figure 5 Shown Figure 1 Middle EE view;

[0024] Figure 6 Shown Figure 1 Middle FF view;

[0025] Figure 7 Shown Figure 1 An angled view of the lens on the object side;

[0026] Figure 8 Shown Figure 1 Another angle view of the lens on the object side;

[0027] Figure 9 Shown Figure 8 Middle AA view;

[0028] Figure 10Shown Figure 8 Enlarged view of point G in the middle;

[0029] Figure 11 Shown Figure 1 An angled view of the middle lens;

[0030] Figure 12 Shown Figure 1 Another angle of view of the middle lens;

[0031] Figure 13 Shown Figure 12 Enlarged view of point H in the middle;

[0032] Figure 14 Shown Figure 12 Middle BB view;

[0033] Figure 15 Shown Figure 1 Another angle of view of the middle lens;

[0034] Figure 16 Shown Figure 1 Schematic diagram of the overall structure of the septum;

[0035] Figure 17 FIG2 shows a schematic diagram of the overall structure of an imaging lens according to a second embodiment of the present invention;

[0036] Figure 18 Shown Figure 17 Middle RR view;

[0037] Figure 19 Shown Figure 17 Middle SS view;

[0038] Figure 20 Shown Figure 17 Middle TT view;

[0039] Figure 21 Shown Figure 17 Schematic diagram of an angle of the object side lens;

[0040] Figure 22 Shown Figure 17 Schematic diagram of another angle of the object side lens;

[0041] Figure 23 Shown Figure 17 Schematic diagram of an angle of the middle lens;

[0042] Figure 24 Shown Figure 17 Schematic diagram of another angle of the middle lens;

[0043] Figure 25Shown Figure 17 Schematic diagram of another angle of the middle lens;

[0044] Figure 26 Shown Figure 17 Schematic diagram of the overall structure of the septum;

[0045] Figure 27 FIG2 shows a schematic diagram of the overall structure of an imaging lens according to a third embodiment of the present invention;

[0046] Figure 28 Shown Figure 27 Middle JJ view;

[0047] Figure 29 Shown Figure 27 Middle KK view;

[0048] Figure 30 Shown Figure 27 Middle MM view;

[0049] Figure 31 Shown Figure 27 An angled view of the lens on the object side;

[0050] Figure 32 Shown Figure 27 Another angle view of the lens on the object side;

[0051] Figure 33 Shown Figure 32 Middle LL view;

[0052] Figure 34 Shown Figure 27 An angled view of the middle lens;

[0053] Figure 35 Shown Figure 27 Another angle of view of the middle lens;

[0054] Figure 36 Shown Figure 35 Center UU view;

[0055] Figure 37 Shown Figure 27 Another angle of view of the middle lens;

[0056] Figure 38 Shown Figure 27 Schematic diagram of the overall structure of the septum.

[0057] The above drawings include the following reference numerals:

[0058] 10. Lens barrel; 20. Lens; 22. First fastening structure; 21. Second fastening structure; 23. Object-side lens; 24. Intermediate lens; 25. Image-side lens; 30. Spacer; 31. Through hole; 40. Fastening surface; 50. Lens draft surface; 60. Table top. DETAILED DESCRIPTION

[0059] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0060] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0061] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0062] In order to solve the problem in the prior art that the MTF performance of an imaging lens cannot be balanced with the stray light, the present invention provides an imaging lens.

[0063] like Figures 1 to 38 As shown, the imaging lens includes a lens barrel 10, at least two lenses 20 and at least one spacer 30. The lenses 20 are arranged at intervals along the axial direction of the lens barrel 10. The object side surface of the optical mechanism area of ​​at least one lens 20 has a plurality of first snap-fit ​​structures 22, and the image side surface of the optical mechanism area of ​​at least another lens 20 has a second snap-fit ​​structure 21 that snaps into the first snap-fit ​​structure 22. The first snap-fit ​​structure 22 and the second snap-fit ​​structure 21 are arranged in a one-to-one correspondence; the spacer 30 is arranged in the lens barrel 10, and the spacer 30 is arranged between the two lenses 20. The spacer 30 has a plurality of through holes 31, and the first snap-fit ​​structure 22 or the second snap-fit ​​structure 21 passes through the through holes 31.

[0064] By providing the first snap-fit ​​structure 22 and the second snap-fit ​​structure 21 on the lens 20, the first snap-fit ​​structure 22 and the second snap-fit ​​structure 21 can be stably snapped together, thereby ensuring a stable connection between two adjacent lenses 20, avoiding misalignment of the lenses 20, and significantly improving the MTF performance of the imaging lens and the production yield of the imaging lens. By providing a through hole 31 on the spacer 30, the first snap-fit ​​structure 22 or the second snap-fit ​​structure 21 can pass through the through hole 31 and snap-fit ​​with the second snap-fit ​​structure 21 or the first snap-fit ​​structure 22. Because the first snap-fit ​​structure 22 and the second snap-fit ​​structure 21 are located within the through hole 31, the spacer 30 can block the gap between the first snap-fit ​​structure 22 and the second snap-fit ​​structure 21, reducing the amount of stray light entering the optically effective area, thereby ensuring the imaging quality of the imaging lens and reducing the generation of stray light while ensuring good MTF performance.

[0065] The lens element 20 closest to the image side of the lens barrel 10 is the image side lens element 25. The object side surface of the image side lens element 25 has a first snap-fit ​​structure 22. The lens element 20 closest to the object side of the lens barrel 10 is the object side lens element 23. The image side surface of the object side lens element 23 has a second snap-fit ​​structure 21. The lens element 20 located between the image side lens element 25 and the object side lens element 23 is the intermediate lens element 24. The object side surface of the intermediate lens element 24 has a first snap-fit ​​structure 22, and the image side surface of the intermediate lens element 24 has a second snap-fit ​​structure 21. This arrangement ensures that each lens element 20 in the imaging lens is snap-fitted with its adjacent lens element 20, ensuring the stability of the arrangement of the lens elements 20 in the lens barrel 10 and significantly improving MTF performance.

[0066] Specifically, the projection of the first snap-fit ​​structure 22 of the middle lens 24 toward the image side is offset from the second snap-fit ​​structure 21. This arrangement prevents the snap-fitting portions of the two adjacent lens groups 20 from overlapping, preventing light from passing through the snap-fitting portions of the lenses 20. This reduces stray light and significantly improves the imaging quality of the lens.

[0067] It should be noted that there will be two groups of adjacent lenses 20 when the three lenses 20 are arranged in sequence. At this time, the two groups of fastening parts between the three lenses 20 are not on the same horizontal plane to ensure that light does not pass through the fastening parts, thereby greatly reducing the generation of stray light.

[0068] Optionally, the first fastening structure 22 is a boss and the second fastening structure 21 is a groove; or the first fastening structure 22 is a groove and the second fastening structure 21 is a boss. The combination of the boss and the groove ensures that the first fastening structure 22 and the second fastening structure 21 can be tightly fastened together. The combination of the boss and the groove can also reduce the passage of light through the fastening parts, thereby reducing the generation of stray light and improving the imaging quality of the imaging lens.

[0069] like Figure 10 As shown, the cross-sectional area of ​​the boss parallel to the lens 20 decreases as it moves away from the lens 20, while the groove expands. This arrangement facilitates the production of the boss and groove, as well as their engagement, making it easier to assemble the imaging lens.

[0070] like Figure 10 As shown, the sidewall of the boss, away from the center of the lens 20, serves as the engaging surface 40 of the lens 20. Engaging surface 40 is tilted relative to the central axis of the boss, and the tilt angle m1 of engaging surface 40 is greater than or equal to 15 degrees and less than or equal to 20 degrees. The tilted engaging surface 40 prevents scratches during assembly, facilitates assembly, and effectively improves the MTF performance and yield of the imaging lens.

[0071] like Figure 10 As shown, the sidewall of the boss, distal from the center of the lens 20, serves as a draft surface 50 for the lens 20. The draft surface 50 is tilted relative to the central axis of the boss, and the inclination angle m2 of the draft surface 50 is greater than 30 degrees. This facilitates removal of the lens 20 from the mold. Setting the inclination angle m2 of the draft surface 50 greater than 30 degrees facilitates rapid demolding of the lens 20 while also preventing scratches on the lens 20.

[0072] Optionally, the width of the table 60 of the boss is greater than or equal to 0.01 mm and less than or equal to 0.2 mm. The table 60 of the boss rests against the bottom of the groove to ensure that the boss and the groove can be stably buckled together and that the lens 20 does not shake. If the width of the table 60 is less than 0.01 mm, the supporting area of ​​the boss and the groove is too small, which can easily cause unstable support of two adjacent lenses 20. If the width of the table 60 is greater than 0.2 mm, the supporting area of ​​the boss and the groove is too large, and the space occupied by the boss and the groove is too large, which is not conducive to the miniaturization of the imaging lens. Limiting the width of the table 60 to within the range of 0.01 mm to 0.2 mm allows the boss and the groove to rest stably against each other without occupying too much space in the lens 20, which is conducive to the miniaturization of the imaging lens.

[0073] Specifically, the lens 20 has an interference fit with the gear position of the lens barrel 10, and the interference fit amount between the lens 20 and the gear position of the lens barrel 10 is greater than or equal to 1 micron and less than or equal to 3 microns. The interference fit between the lens 20 and the gear position of the lens barrel 10 can ensure that the lens 20 can be stably placed in the lens barrel 10 and ensure that the lens 20 operates stably. If the interference fit amount between the lens 20 and the gear position of the lens barrel 10 is less than 1 micron, the lens 20 is easily separated from the gear position of the lens barrel 10, making the assembly of the lens 20 unstable. If the interference fit amount between the lens 20 and the gear position of the lens barrel 10 is greater than 3 microns, the contact between the lens 20 and the gear position of the lens barrel 10 is too tight, making it difficult for the lens 20 to be assembled into the lens barrel 10. Limiting the interference fit amount between the lens 20 and the gear position of the lens barrel 10 to a range of 1 micron to 3 microns makes it easy to assemble the lens 20 onto the lens barrel 10 while ensuring the stability of the assembly between the lens 20 and the lens barrel 10.

[0074] Specifically, the lens 20 and the spacer 30 are spaced apart, and the distance m between the lens 20 and the spacer 30 is greater than or equal to 0.003 mm and less than or equal to 0.01 mm. The spacer 30 can be spaced apart to effectively prevent the spacer 30 from being deformed by baking and generating stray light.

[0075] Specifically, the first fastening structure 22 and the second fastening structure 21 have an interference fit, and the interference fit between the first fastening structure 22 and the second fastening structure 21 is greater than or equal to 1 micron and less than or equal to 3 microns. If the interference fit between the first fastening structure 22 and the second fastening structure 21 is less than 1 micron, the first fastening structure 22 and the second fastening structure 21 are not tightly fastened, making it easy for the first fastening structure 22 to separate from the second fastening structure 21. If the interference fit between the first fastening structure 22 and the second fastening structure 21 is greater than 3 microns, the contact between the first fastening structure 22 and the second fastening structure 21 is too tight, making it difficult for the first fastening structure 22 to engage with the second fastening structure 21. Limiting the interference fit between the first fastening structure 22 and the second fastening structure 21 to a range of 1 micron to 3 microns allows the first fastening structure 22 and the second fastening structure 21 to easily engage while ensuring that they are not easily separated, thereby increasing the stability of the fastening between the first fastening structure 22 and the second fastening structure 21.

[0076] Optionally, the first buckling structure 22 overlaps the second buckling structure 21, and the overlap width b between the first buckling structure 22 and the second buckling structure 21 is greater than or equal to 0.04 mm and less than or equal to 0.15 mm. This arrangement can ensure a tight buckling between the first buckling structure 22 and the second buckling structure 21.

[0077] Example 1

[0078] exist Figures 1 to 16In the illustrated embodiment, the lens 20 has two first snap-fit ​​structures 22, the image-side surface of the intermediate lens 24 has a second snap-fit ​​structure 21, and the object-side surface of the intermediate lens 24 has a first snap-fit ​​structure 22. In this embodiment, the interference fit between the lens elements 20 is 3 microns. The spacing between the lens elements 20 and the spacer 30 is 5 microns.

[0079] Optionally, the difference between the curvature of the through hole 31 and the curvature of the first fastening structure 22 is 3 degrees. This ensures that the first fastening structure 22 or the second fastening structure 21 passes through the through hole 31 and effectively reduces the amount of light passing through the gap between the first fastening structure 22 or the second fastening structure 21 and the through hole 31, thereby reducing the generation of stray light.

[0080] In this embodiment, the curvature of the first buckling structure 22 is 90 degrees, and the curvature of the through hole 31 of the spacer 30 is 93 degrees, which can ensure that the first buckling structure 22 or the second buckling structure 21 passes through the through hole 31.

[0081] Example 2

[0082] The difference from the first embodiment is that the number of first buckling structures 22 on the lens 20 is different.

[0083] exist Figures 17 to 26 In the illustrated embodiment, the lens 20 has three first snap-fit ​​structures 22, the image-side surface of the intermediate lens 24 has three second snap-fit ​​structures 21, and the object-side surface of the intermediate lens 24 has three first snap-fit ​​structures 22. In this embodiment, the interference fit between the lens elements 20 is 3 microns. The spacing between the lens elements 20 and the spacer 30 is 5 microns.

[0084] In this embodiment, the curvature of the first buckling structure 22 is 60 degrees, and the curvature of the through hole 31 of the spacer 30 is 63 degrees, which can ensure that the first buckling structure 22 or the second buckling structure 21 passes through the through hole 31.

[0085] Example 3

[0086] The difference from the first embodiment is that the number of first buckling structures 22 on the lens 20 is different.

[0087] exist Figures 27 to 38 In the illustrated embodiment, the lens 20 has four first engaging structures 22, the image-side surface of the intermediate lens 24 has four second engaging structures 21, and the object-side surface of the intermediate lens 24 has four first engaging structures 22. In this embodiment, the interference fit between the lens elements 20 is 3 microns. The spacing between the lens elements 20 and the spacer 30 is 5 microns.

[0088] In this embodiment, the curvature of the first buckling structure 22 is 45 degrees, and the curvature of the through hole 31 of the spacer 30 is 48 degrees, which can ensure that the first buckling structure 22 or the second buckling structure 21 passes through the through hole 31.

[0089] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0090] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0091] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0092] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An imaging lens, characterized in that: include: Lens barrel (10); At least two lenses (20), the lenses (20) being arranged at intervals along the axial direction of the lens barrel (10), the object side surface of the optical mechanism area of ​​at least one of the lenses (20) having a plurality of first buckling structures (22), and the image side surface of the optical mechanism area of ​​at least another of the lenses (20) having a second buckling structure (21) buckled with the first buckling structure (22), the first buckling structure (22) and the second buckling structure (21) being arranged in a one-to-one correspondence; at least one spacer (30), the spacer (30) being arranged in the lens barrel (10) and between the two lenses (20), the spacer (30) having a plurality of through holes (31), the first buckling structure (22) or the second buckling structure (21) passing through the through holes (31); The difference between the curvature of the through hole (31) and the curvature of the first buckling structure (22) is 3 degrees, and the spacer (30) is capable of covering the gap at the buckling point between the first buckling structure (22) and the second buckling structure (21); The first buckling structure (22) and the second buckling structure (21) are overlapped, and a width b of the overlap between the first buckling structure (22) and the second buckling structure (21) is greater than or equal to 0.04 mm and less than or equal to 0.15 mm.

2. The imaging lens according to claim 1, wherein: The lens (20) in the lens (20) that is close to the image side end of the lens barrel (10) is an image side lens (25), and the object side surface of the image side lens (25) has the first buckling structure (22); The lens (20) in the lens (20) that is close to the object side end of the lens barrel (10) is the object side lens (23), and the image side surface of the object side lens (23) has the second buckling structure (21); The lens (20) located between the image side lens (25) and the object side lens (23) in the lens (20) is an intermediate lens (24), the object side surface of the intermediate lens (24) has the first buckling structure (22), and the image side surface of the intermediate lens (24) has the second buckling structure (21).

3. The imaging lens according to claim 2, wherein: The projection of the first buckling structure (22) of the intermediate lens (24) onto the image side is misaligned with the second buckling structure (21).

4. The imaging lens according to claim 1, wherein: The first buckling structure (22) is a boss, and the second buckling structure (21) is a groove; or The first buckling structure (22) is a groove, and the second buckling structure (21) is a boss.

5. The imaging lens according to claim 4, wherein: The cross-sectional area of ​​the boss in a direction parallel to the lens (20) tends to decrease in a direction away from the lens (20), and the groove is in a flared shape.

6. The imaging lens according to claim 5, wherein: A side wall of the boss close to the center of the lens (20) serves as a buckling surface (40) of the lens (20), the buckling surface (40) is tilted relative to the central axis of the boss, and an inclination angle m1 of the buckling surface (40) is greater than or equal to 15 degrees and less than or equal to 20 degrees.

7. The imaging lens according to claim 5, wherein: The side wall of the boss away from the center of the lens (20) serves as a lens draft surface (50) of the lens (20), the lens draft surface (50) is tilted relative to the central axis of the boss, and the inclination angle m2 of the lens draft surface (50) is greater than 30 degrees.

8. The imaging lens according to claim 5, wherein: The width of the platform (60) of the boss is greater than or equal to 0.01 mm and less than or equal to 0.2 mm.

9. The imaging lens according to any one of claims 1 to 8, wherein: The lens (20) and the lens barrel (10) have an interference fit at the gear position, and the interference fit amount between the lens (20) and the lens barrel (10) is greater than or equal to 1 micron and less than or equal to 3 microns; and / or The lens (20) and the spacer (30) are spaced apart, and the interval m between the lens (20) and the spacer (30) is greater than or equal to 0.003 mm and less than or equal to 0.01 mm.

10. The imaging lens according to any one of claims 1 to 8, wherein: The first buckling structure (22) and the second buckling structure (21) are interference-fitted, and the interference fit amount between the first buckling structure (22) and the second buckling structure (21) is greater than or equal to 1 micron and less than or equal to 3 microns.

Images