Imaging lens

Abstract

The utility model provides an imaging lens. The imaging lens includes a lens barrel and a plurality of lenses disposed in the lens barrel, the plurality of lenses including a first lens at an end portion of an object side, among the plurality of lenses, a center thickness of the first lens on an optical axis of the imaging lens being maximum; the first lens is composed of an effective part, a connecting part and an edge mechanism part, the effective part, the connecting part and the edge mechanism part are sequentially connected from the center to the edge of the first lens, the edge mechanism part is provided with a bearing surface, the bearing surface is located on the side, facing a shot object, of the edge mechanism part, and the bearing surface abuts against the lens barrel; the object side end of the lens barrel is provided with a head structure, and the object side outer diameter D of the head structure and the entrance pupil diameter EPD of the imaging lens meet the condition that (D-EPD) / 2 is larger than or equal to 0.19 mm and smaller than or equal to 0.35 mm. According to the utility model, the problem that an imaging lens in the prior art is difficult to consider both a large entrance pupil and a small head is solved.

Description

Technical Field

[0001] This utility model relates to the field of imaging equipment technology, and more specifically, to an imaging lens. Background Technology

[0002] In the current development trend of smartphone cameras, the design of the front-facing camera has received particular attention, aiming to meet the shooting needs of selfie enthusiasts. To accommodate the increasing selfie functions, the design of the imaging lens has gradually moved towards a smaller head. However, this design has certain limitations, especially in terms of the requirements for the primary lens.

[0003] In traditional small-head imaging lenses, the first lens usually adopts a conventional or irregular structure. Imaging lenses with a conventional structure have a small entrance pupil, which can easily lead to insufficient image brightness and make it difficult to match shooting requirements; while irregular structures increase the difficulty of molding and are not conducive to manufacturing.

[0004] In other words, existing imaging lenses have the problem of simultaneously accommodating a large entrance pupil and a small head. Utility Model Content

[0005] The main objective of this invention is to provide an imaging lens that solves the problem that existing imaging lenses cannot simultaneously accommodate a large entrance pupil and a small head.

[0006] To achieve the above objectives, this utility model provides an imaging lens, including a lens barrel and multiple lenses disposed within the lens barrel. The multiple lenses include a first lens located at the object-side end. Among the multiple lenses, the first lens has the largest center thickness on the optical axis of the imaging lens. The first lens consists of an effective part, a connecting part, and an edge mechanism part, which are sequentially connected from the center to the edge of the first lens. The edge mechanism part has a bearing surface located on the side of the edge mechanism part facing the object being photographed, and the bearing surface abuts against the lens barrel. The object-side end of the lens barrel has a head structure, and the object-side outer diameter D of the head structure satisfies the following condition with the entrance pupil diameter EPD of the imaging lens: 0.19mm ≤ (D-EPD) / 2 ≤ 0.35mm.

[0007] Furthermore, the head structure has an object-side end face and an extension surface. The object-side end face is perpendicular to the optical axis and is positioned closer to the object being photographed relative to the extension surface. The end of the object-side end face that is closer to the optical axis is connected to the end of the extension surface that is farther from the optical axis. The projection position of the end of the extension surface that is farther from the optical axis on the optical axis is positioned closer to the object being photographed relative to the projection position of the end of the extension surface that is closer to the optical axis on the optical axis. The end of the extension surface that is closer to the optical axis is the entrance pupil position of the imaging lens.

[0008] Furthermore, the effective part has an object-side effective diameter surface and an object-side connecting slope. The object-side effective diameter surface is located on the optical axis. The outer peripheral end of the object-side effective diameter surface is connected to the object-side end of the object-side connecting slope. The distance from the object-side connecting slope to the optical axis gradually increases from the object-side end to the image-side end.

[0009] Furthermore, the projection of the object-side end face onto the bearing surface partially coincides with the bearing surface, and the line connecting the overlapping area of ​​the object-side end face to the overlapping area of ​​the bearing surface along the optical axis is located in the structure of the lens barrel.

[0010] Furthermore, the distance SAGJ11 between the intersection of the object-side surface of the first lens and the optical axis and the bearing surface on the optical axis satisfies the following condition: 0.65. <SAGJ11 / ct1<0.88。

[0011] Furthermore, the outer diameter D of the head structure on the object side, the minimum diameter D01 of the bearing surface, and the length H of the head structure on the optical axis satisfy the following condition: 0.10 < (D - D01) / H < 0.50.

[0012] Furthermore, the length H of the head structure on the optical axis satisfies the following relationship with the minimum thickness d of the lens barrel: 0.24 ≤ d / H ≤ 0.48; and / or, the sum of the radial lengths of the connecting part and the radial lengths of the edge mechanism part, h, satisfies the following relationship with the maximum thickness TS of the connecting part: 1.40. <h / TS<1.75。

[0013] Furthermore, the lens tube also has a shoulder structure that connects to the head structure. The outer side of the head structure and the outer side of the shoulder structure are connected by a rounded corner surface, and the radius R of the rounded corner surface is greater than or equal to 0.05 mm and less than or equal to 0.20 mm.

[0014] Furthermore, the lens tube also has a shoulder structure connected to the head structure. The outer side of the shoulder structure has an inclined surface, and the angle B between the inclined surface and the optical axis satisfies: 60°≤B≤80°.

[0015] Furthermore, the angle A between the outer surface of the head structure and the optical axis satisfies: 2°≤A≤8°; and / or, the effective part has an object-side effective diameter surface and an object-side connecting slope, the outer peripheral end of the object-side effective diameter surface is connected to the object-side end of the object-side connecting slope, the angle a between the object-side connecting slope and the optical axis satisfies: 10°≤a≤15°, and the minimum distance ct0 between the object-side connecting slope and the lens barrel satisfies: 0.005mm≤ct0≤0.030mm.

[0016] According to the technical solution of this utility model, the imaging lens includes a lens barrel and multiple lenses disposed in the lens barrel. The multiple lenses include a first lens located at the object-side end. Among the multiple lenses, the first lens has the largest center thickness on the optical axis of the imaging lens. The first lens is composed of an effective part, a connecting part, and an edge mechanism part. The effective part, the connecting part, and the edge mechanism part are connected sequentially from the center to the edge of the first lens. The edge mechanism part has a bearing surface located on the side of the edge mechanism part facing the object being photographed, and the bearing surface abuts against the lens barrel. The object-side end of the lens barrel has a head structure. The object-side outer diameter D of the head structure and the entrance pupil diameter EPD of the imaging lens satisfy the following: 0.19mm≤(D-EPD) / 2≤0.35mm.

[0017] By setting the center thickness of the first lens to be the maximum along the optical axis of the imaging lens, the structure of the first lens is rationally optimized. This allows the center thickness of the first lens to match the large entrance pupil, ensuring that the first lens can receive light at large angles and thus guaranteeing sufficient light intake, which is beneficial for improving image brightness. By setting the object-side bearing surface of the edge mechanism to abut against the lens barrel, the lens barrel can provide more stable axial support for the first lens, reducing the movement or tilting of the first lens during assembly or use, ensuring the assembly stability between the first lens and the lens barrel, and thus improving the structural stability of the entire imaging lens. The direct bearing between the edge mechanism and the lens barrel can disperse the pressure on the first lens during assembly, preventing deformation or stress concentration due to excessive local force, which is beneficial for maintaining good optical characteristics of the imaging lens. At the same time, this makes the overall imaging lens more compact. By constraining 0.19mm≤(D-EPD) / 2≤0.35mm, the size of the object-side outer diameter of the head structure is controlled, avoiding an excessively large outer diameter. This is beneficial for achieving a minimum screen opening during application, ensuring the screen ratio of the mobile phone in which the imaging lens is used. At the same time, while meeting the requirements of the ultra-small head design, the entrance pupil diameter of the optical lens is ensured to be large enough, so that the imaging lens can capture more detailed information of the scene and ensure image brightness. Attached Figure Description

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

[0019] Figure 1 A partial structural schematic diagram of the imaging lens of an optional embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 The dimension annotation diagram of the imaging lens in the diagram;

[0021] Figure 3A schematic diagram of the assembly of the imaging lens according to an optional embodiment of the present invention is shown;

[0022] Figure 4 A partial structural schematic diagram of the imaging lens of an optional embodiment of the present invention is shown;

[0023] Figure 5 A partial structural schematic diagram of the imaging lens of Embodiment 1 of this utility model is shown;

[0024] Figure 6 A partial structural schematic diagram of the imaging lens of Embodiment 2 of this utility model is shown;

[0025] Figure 7 A partial structural schematic diagram of the imaging lens of Embodiment 3 of this utility model is shown;

[0026] Figure 8 A partial structural schematic diagram of the imaging lens of Embodiment 4 of this utility model is shown;

[0027] Figure 9 A partial structural schematic diagram of the imaging lens of Embodiment 5 of this utility model is shown;

[0028] Figure 10 A partial structural schematic diagram of the imaging lens of Embodiment Six of this utility model is shown;

[0029] Figure 11 A partial structural schematic diagram of the imaging lens of Embodiment Seven of this utility model is shown.

[0030] The above figures include the following reference numerals:

[0031] 1. Lens tube; 11. Head structure; 12. Rounded corner surface; 13. Shoulder structure; 131. Inclined surface; 14. Object-side end face; 15. Extension surface; 2. First lens; 21. Effective part; 211. Object-side effective diameter surface; 212. Object-side connecting inclined surface; 22. Connecting part; 23. Edge mechanism part; 231. Supporting surface; 3. Optical axis. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] 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 one of ordinary skill in the art to which this application pertains.

[0034] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0035] In this application, the object side refers to the side of the imaging lens facing the object being photographed (not shown in the figure), and the image side refers to the side of the imaging lens facing the imaging plane (not shown in the figure). hereinafter, the object side of a lens refers to the surface of the lens facing the object being photographed (not shown in the figure), and the image side of a lens refers to the surface of the lens facing the imaging plane (not shown in the figure). Figure 1 , Figure 2 as well as Figures 5 to 11 In the diagram shown, the left side is the object side and the right side is the image side.

[0036] To address the problem that existing imaging lenses cannot simultaneously accommodate both a large entrance pupil and a small head, this invention provides an imaging lens.

[0037] like Figures 1 to 11 As shown, the imaging lens includes a lens barrel 1 and multiple lenses disposed within the lens barrel 1, including a first lens 2 located at the object-side end. Among the multiple lenses, the first lens 2 has the largest center thickness on the optical axis 3 of the imaging lens. The first lens 2 consists of an effective part 21, a connecting part 22, and an edge mechanism part 23, which are sequentially connected from the center to the edge of the first lens 2. The edge mechanism part 23 has a bearing surface 231, which is located on the side of the edge mechanism part 23 facing the object being photographed, and the bearing surface 231 abuts against the lens barrel 1. The object-side end of the lens barrel 1 has a head structure 11, and the object-side outer diameter D of the head structure 11 satisfies the following condition with the entrance pupil diameter EPD of the imaging lens: 0.19mm ≤ (D-EPD) / 2 ≤ 0.35mm.

[0038] By setting the center thickness of the first lens 2 to be the maximum on the optical axis 3 of the imaging lens, the structure of the first lens 2 is rationally optimized, allowing its center thickness to match the large entrance pupil. This ensures that the first lens 2 can receive large-angle light, thereby guaranteeing sufficient light intake and improving image brightness. By setting the object-side bearing surface 231 of the edge mechanism 23 to abut against the lens barrel 1, the lens barrel 1 provides more stable axial support for the first lens 2, reducing movement or tilting of the first lens 2 during assembly or use. This ensures the assembly stability between the first lens 2 and the lens barrel 1, thus improving the overall structural stability of the imaging lens. The direct abutment between the edge mechanism 23 and the lens barrel 1 disperses the pressure on the first lens 2 during assembly, preventing deformation or stress concentration due to excessive localized force. This helps the imaging lens maintain good optical characteristics and also makes the overall imaging lens more compact. By constraining the outer diameter of the head structure 11 to 0.19mm ≤ (D-EPD) / 2 ≤ 0.35mm, the size of the object-side outer diameter is controlled, avoiding excessively large outer diameters. This facilitates achieving a minimum screen opening during application, ensuring the screen-to-body ratio of the mobile phone to which the imaging lens is used. Simultaneously, while meeting the requirements of an ultra-small head design, the entrance pupil diameter of the optical lens is ensured to be sufficiently large, thereby guaranteeing that the imaging lens can capture more detailed information of the scene and ensure image brightness.

[0039] It should be noted that the focus of this application is not on the number of lenses, therefore this application does not limit the number of lenses. Multiple lenses can specifically be two lenses, three lenses or more lenses, which can be set according to the actual situation.

[0040] It should also be noted that the aforementioned plurality of lenses includes a first lens 2 located at the object-side end, specifically referring to the lens closest to the object being photographed among the plurality of lenses as the first lens 2. The object-side end of the lens barrel 1 specifically refers to the end of the lens barrel 1 facing the object being photographed. The effective portion 21 specifically refers to the part of the first lens 2 used for light transmission and participation in imaging, typically the optically effective area of ​​the lens. The edge mechanism portion 23 is the outer peripheral portion of the first lens 2, which is a non-optically effective area and does not participate in imaging; it is typically used for support with adjacent lenses, spacers, or the lens barrel 1. The connecting portion 22 is used for transitioning and connecting the effective portion 21 and the edge mechanism portion 23, and does not participate in imaging.

[0041] like Figures 1 to 4As shown, the head structure 11 has an object-side end face 14 and an extension surface 15. The object-side end face 14 is perpendicular to the optical axis 3 and is positioned closer to the object being photographed than the extension surface 15. The end of the object-side end face 14 closest to the optical axis 3 is connected to the end of the extension surface 15 furthest from the optical axis 3. The projection position of the end of the extension surface 15 furthest from the optical axis 3 on the optical axis 3 is closer to the object being photographed than the projection position of the end of the extension surface 15 closest to the optical axis 3 on the optical axis 3. The end of the extension surface 15 furthest from the object-side end face 14 extends towards the direction closest to the optical axis 3 and bends inward toward the lens barrel 1. This arrangement ensures the strength of the head structure 11 while maintaining a small head size, thereby avoiding the risk of deformation of the head structure 11 under pressure.

[0042] It should be noted that the aforementioned object-side end face 14 specifically refers to the end face of the head structure 11 facing the object being photographed.

[0043] like Figure 1 As shown, the effective portion 21 has an object-side effective diameter surface 211 and an object-side connecting slope 212. The object-side effective diameter surface 211 is located on the optical axis 3 and protrudes towards the object side. The outer peripheral end of the object-side effective diameter surface 211 is connected to the object-side end of the object-side connecting slope 212. The distance from the object-side connecting slope 212 to the optical axis 3 gradually increases from the object-side end to the image-side end. That is, the object-side connecting slope 212 is inclined to the optical axis 3, and its two sides are connected to the surface of the object-side effective diameter surface 211 and the surface of the connecting portion 22 or the surface of the edge mechanism portion 23, respectively. This configuration optimizes the structure of the first lens 2. The object-side connecting slope 212 can match the structural requirements of a large center thickness, optimizes the overall shape of the first lens 2, and helps to improve the forming reliability of the first lens 2.

[0044] It should be noted that the aforementioned object-side effective diameter surface 211 and object-side connecting inclined surface 212 are both located on the side surface of the effective part 21 facing the object being photographed.

[0045] like Figure 2 As shown, the angle α between the object-side connecting inclined surface 212 and the optical axis 3 satisfies: 10°≤a≤15°. By reasonably constraining the angle α, the processing feasibility of the first lens 2 can be ensured. If the angle is too large or too small, the forming yield of the first lens 2 will be low.

[0046] like Figure 3 and Figure 4As shown, the above-mentioned bearing surface 231 is actually the part where the object side surface of the edge mechanism part 23 contacts and bears against the lens barrel 1. The projection of the object side end surface 14 on the bearing surface 231 partially coincides with the bearing surface 231, and the connection line of the coincidence area of the object side end surface 14 to the coincidence area of the bearing surface 231 along the optical axis 3 is located in the structure of the lens barrel 1. That is to say, the projection parts of the object side end surface 14 and the bearing surface 231 on each other partially coincide, and the connection line of the coincidence area of the object side end surface 14 to the coincidence area of the bearing surface 231 along the optical axis 3 is Figure 4 the two dashed lines in . Specifically, these two dashed lines are respectively the connection line of one end of the coincidence area of the object side end surface 14 to one end of the coincidence area of the bearing surface 231 along the optical axis 3, and the connection line of the other end of the coincidence area of the object side end surface 14 to the other end of the coincidence area of the bearing surface 231 along the optical axis 3. These two dashed lines are arranged in parallel and are inside the structure of the lens barrel 1. This is beneficial to ensuring the mutual stable support between the first lens 2 and the lens barrel 1 and ensuring the assembly stability of the first lens 2 in the axial direction.

[0047] As Figure 2 shown, the distance SAGJ11 on the optical axis 3 between the intersection point of the object side surface of the first lens 2 and the optical axis 3 and the bearing surface 231 and the central thickness ct1 of the first lens 2 on the optical axis 3 satisfy: 0.65 < SAGJ11 / ct1 < 0.88. Reasonably controlling the value range of this expression can ensure that the edge mechanism part 23 of the first lens 2 is arranged closer to its image side surface than its object side surface. By offsetting the edge mechanism part 23 towards the image side, it is beneficial to reduce the outer diameter of the first lens 2, and then reduce the head size of the imaging lens. And compared with the conventional small-head imaging lens, the effective diameter area of the first lens 2 can be maximally expanded, which is beneficial to increasing the light input amount and improving the imaging illumination.

[0048] Specifically, the object side outer diameter D of the head structure 11, the minimum diameter D01 of the bearing surface 231 and the length H of the head structure 11 on the optical axis 3 satisfy: 0.10 < (D - D01) / H < 0.50. Controlling the range of this expression can ensure that during the assembly process of the imaging lens, there is no situation of bearing misalignment in the force on the contact surface between the bearing surface 231 of the first lens 2 and the lens barrel 1. If the value of this expression is lower than 0.10, it means that the length of the head structure 11 on the optical axis 3 is too large or the bearing coincidence dimension is too small, then during the assembly process, the lens barrel 1 may not be able to withstand the assembly pressure and deform, affecting the yield rate of the assembly process of the imaging lens.

[0049] Specifically, the length H of the head structure 11 on the optical axis 3 and the minimum thickness d of the lens barrel 1 satisfy: 0.24 ≤ d / H ≤ 0.48. Controlling this expression is to ensure the processing feasibility of the lens barrel 1 and the reliability of the imaging lens. If the value of d / H is lower than 0.24, it may occur that the wall thickness of the lens barrel 1 is too small to form a problem that is difficult to process, or the lens barrel 1 is deformed during reliability tests such as high temperature and high humidity and drop collisions, resulting in the performance failure of the imaging lens. If the value of d / H is greater than 0.48, it is not conducive to the design of the ultra-small head of the imaging lens.

[0050] Specifically, the sum h of the radial lengths of the connecting part 22 and the edge mechanism part 23 and the maximum thickness TS of the connecting part 22 satisfy: 1.40 < h / TS < 1.75. During the lens injection molding process, when demolding, the entire lens is pulled out of the mold by the feeding handle at the outer diameter of the lens. According to the lever principle, the longer the force arm, the greater the bending moment generated by the same force, and the easier the object is to break. Therefore, controlling this expression to be less than the upper limit value is to avoid the situation where the connecting part 22 cannot withstand the bending moment and breaks due to excessive pulling force. Controlling this expression to be greater than the lower limit value is to avoid the situation where h is too small and affects the bearing stability of the second lens; this is also to control the thickness of the connecting part 22. The thickness of the connecting part 22 is positively correlated with the central thickness of the first lens 2. If the central thickness of the first lens 2 is too large, it will affect the overall performance and illuminance of the imaging lens.

[0051] As Figure 2 shown, the lens barrel 1 also has a shoulder structure 13 connected to the head structure 11. The outer side surface of the head structure 11 and the outer side surface of the shoulder structure 13 are connected by a fillet surface 12 in a transitional manner. The fillet radius R of the fillet surface 12 is greater than or equal to 0.05 mm and less than or equal to 0.20 mm. Such a setting can ensure the molding yield rate of the lens barrel 1 during the demolding process, and at the same time avoid problems such as pulling and fracture caused by too small fillet radius, improve the molding yield rate and reliability of the imaging lens, and even under high-intensity demolding pressure, the lens barrel 1 can maintain a stable structure.

[0052] Specifically, the outer side of the shoulder structure 13 has an inclined surface 131. The inclined surface 131 is inclined with respect to the optical axis 3, and the angle B between the inclined surface 131 and the optical axis 3 satisfies: 60° ≤ B ≤ 80°. Such a setting can ensure the molding yield rate of the lens barrel 1 under the condition of the minimum outer shape. If B is too small, quality problems such as pulling and fracture are likely to occur during the demolding process of the lens barrel 1; if B is too large, it is difficult to meet the original design intention of the small head, resulting in the lens barrel 1 occupying a large assembly space and being unfavorable for the position planning of other structures.

[0053] Specifically, the angle A between the outer surface of the head structure 11 and the optical axis 3 satisfies: 2°≤A≤8°. Angle A is actually the demolding angle, which helps to ensure the molding yield of the lens barrel 1 under the condition of minimum size. If A is too small, quality problems such as tearing and breakage are likely to occur during the demolding process of the lens barrel 1; if A is too large, it is difficult to meet the original design intention of small head, so that the lens barrel 1 occupies a large assembly space, which is not conducive to the position planning of other structures.

[0054] Specifically, the object-side connecting inclined surface 212 is spaced apart from the lens barrel 1, and the minimum distance ct0 between the object-side connecting inclined surface 212 and the lens barrel 1 satisfies: 0.005mm≤ct0≤0.030mm. This arrangement can avoid multiple points of contact affecting the assembly coaxiality of the lens barrel 1 and the first lens 2, thereby ensuring the assembly accuracy of the first lens 2 and the lens barrel 1, while also matching the small head design.

[0055] Of course, the lens barrel 1 also includes a rear end structure connected to the shoulder structure 13. That is to say, the lens barrel 1 is composed of a head structure 11, a shoulder structure 13 and a rear end structure. The head structure 11, the shoulder structure 13 and the rear end structure are connected sequentially from the object side to the image side. Since the rear end structure is not the focus of this application, the rear end structure can be set according to the actual situation, and this application does not impose any restrictions.

[0056] The imaging lens of this application will now be described in conjunction with specific embodiments and accompanying drawings.

[0057] Example 1

[0058] like Figure 5 The diagram shown is a partial structural schematic of the imaging lens in Embodiment 1.

[0059] In Embodiment 1, the object-side outer diameter D of the head structure 11 is 1.5 mm, the length H of the head structure 11 on the optical axis 3 is 0.4 mm, and the angle B between the inclined surface 131 and the optical axis 3 is 80°.

[0060] Example 2

[0061] like Figure 6 The diagram shown is a partial structural schematic of the imaging lens in Embodiment 2.

[0062] In Embodiment 2, the object-side outer diameter D of the head structure 11 is 2.5 mm, the length H of the head structure 11 on the optical axis 3 is 0.8 mm, and the angle B between the inclined surface 131 and the optical axis 3 is 78°.

[0063] Example 3

[0064] like Figure 7 The image shown is a partial structural schematic diagram of the imaging lens in Embodiment 3.

[0065] In Embodiment 3, the object-side outer diameter D of the head structure 11 is 2.4 mm, the length H of the head structure 11 on the optical axis 3 is 0.6 mm, and the angle B between the inclined surface 131 and the optical axis 3 is 73°.

[0066] Example 4

[0067] like Figure 8 The diagram shown is a partial structural schematic of the imaging lens in Embodiment 4.

[0068] In Embodiment 4, the object-side outer diameter D of the head structure 11 is 2.28 mm, the length H of the head structure 11 on the optical axis 3 is 0.4 mm, and the angle B between the inclined surface 131 and the optical axis 3 is 60°.

[0069] Example 5

[0070] like Figure 9 The diagram shown is a partial structural schematic of the imaging lens in Embodiment 5.

[0071] In Embodiment 5, the object-side outer diameter D of the head structure 11 is 2.18 mm, the length H of the head structure 11 on the optical axis 3 is 0.43 mm, and the angle B between the inclined surface 131 and the optical axis 3 is 68°.

[0072] Example 6

[0073] like Figure 10 The diagram shown is a partial structural schematic of the imaging lens in Embodiment Six.

[0074] In Embodiment Six, the object-side outer diameter D of the head structure 11 is 1.8 mm, the length H of the head structure 11 on the optical axis 3 is 0.5 mm, and the angle B between the inclined surface 131 and the optical axis 3 is 65°.

[0075] Example 7

[0076] like Figure 11 The diagram shown is a partial structural schematic of the imaging lens in Embodiment 7.

[0077] In Embodiment Seven, the object-side outer diameter D of the head structure 11 is 1.0 mm, the length H of the head structure 11 on the optical axis 3 is 0.7 mm, and the angle B between the inclined surface 131 and the optical axis 3 is 70°.

[0078] In summary, Examples 1 to 7 satisfy the relationships shown in Table 1 below.

[0079] Table 1

[0080] Parameters / Examples Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 (D-EPD) / 2(mm) 0.19 0.35 0.31 0.33 0.28 0.30 0.31 A(°) 6 7 8 3 4 5 2 R(mm) 0.05 0.20 0.12 0.10 0.08 0.18 0.15 d / H 0.33 0.25 0.30 0.48 0.36 0.32 0.24 (D-D01) / H 0.15 0.10 0.17 0.50 0.33 0.28 0.14 a(°) 10 13 15 11 12 14 12 ct0(mm) 0.005 0.030 0.010 0.020 0.018 0.014 0.015 SAGJ11 / ct1 0.87 0.76 0.72 0.66 0.69 0.74 0.75 h / TS 1.55 1.60 1.59 1.41 1.50 1.73 1.69

[0081] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0082] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0083] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0084] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An imaging lens, characterized in that, The lens includes a lens barrel and a plurality of lenses disposed in the lens barrel. The plurality of lenses include a first lens located at the object-side end. Among the plurality of lenses, the first lens has the largest center thickness on the optical axis of the imaging lens. The first lens is composed of an effective part, a connecting part, and an edge mechanism part. The effective part, the connecting part, and the edge mechanism part are connected sequentially from the center to the edge of the first lens. The edge mechanism part has a bearing surface, which is located on the side of the edge mechanism part facing the object being photographed, and the bearing surface abuts against the lens barrel. The object-side end of the lens barrel has a head structure, and the object-side outer diameter D of the head structure and the entrance pupil diameter EPD of the imaging lens satisfy the following condition: 0.19mm≤(D-EPD) / 2≤0.35mm.

2. The imaging lens according to claim 1, characterized in that, The head structure has an object-side end face and an extension surface. The object-side end face is perpendicular to the optical axis and is positioned close to the object being photographed relative to the extension surface. One end of the object-side end face close to the optical axis is connected to the end of the extension surface away from the optical axis. The projection position of the end of the extension surface away from the optical axis on the optical axis is positioned close to the object being photographed relative to the projection position of the end of the extension surface close to the optical axis on the optical axis. The end of the extension surface close to the optical axis is the entrance pupil position of the imaging lens.

3. The imaging lens according to claim 1, characterized in that, The effective part has an object-side effective diameter surface and an object-side connecting slope. The object-side effective diameter surface is located on the optical axis. The outer peripheral end of the object-side effective diameter surface is connected to the object-side end of the object-side connecting slope. The distance from the object-side connecting slope to the optical axis gradually increases from the object-side end to the image-side end.

4. The imaging lens according to claim 2, characterized in that, The projection of the object-side end face onto the bearing surface partially coincides with the bearing surface, and the line connecting the overlapping area of ​​the object-side end face to the overlapping area of ​​the bearing surface along the direction of the optical axis is located in the structure of the lens barrel.

5. The imaging lens according to claim 1, characterized in that, The distance SAGJ11 between the intersection of the object-side surface of the first lens and the optical axis and the bearing surface on the optical axis satisfies the following condition: 0.

65. <SAGJ11 / ct1<0.88。 6. The imaging lens according to claim 1, characterized in that, The outer diameter D of the head structure on the object side, the minimum diameter D01 of the bearing surface, and the length H of the head structure on the optical axis satisfy the following condition: 0.10 < (D - D01) / H < 0.

50.

7. The imaging lens according to claim 1, characterized in that, The length H of the head structure on the optical axis and the minimum thickness d of the lens barrel satisfy the following relationship: 0.24 ≤ d / H ≤ 0.48; and / or, The sum h of the radial length of the connecting portion and the radial length of the edge mechanism portion satisfies the following relationship with the maximum thickness TS of the connecting portion: 1.40 <h / TS<1.75。 8. The imaging lens according to any one of claims 1 to 7, characterized in that, The lens barrel also has a shoulder structure connected to the head structure. The outer side of the head structure and the outer side of the shoulder structure are connected by a rounded corner surface. The radius R of the rounded corner surface is greater than or equal to 0.05 mm and less than or equal to 0.20 mm.

9. The imaging lens according to any one of claims 1 to 7, characterized in that, The lens barrel also has a shoulder structure connected to the head structure. The outer side of the shoulder structure has an inclined surface, and the angle B between the inclined surface and the optical axis satisfies: 60°≤B≤80°.

10. The imaging lens according to any one of claims 1 to 7, characterized in that, The angle A between the outer surface of the head structure and the optical axis satisfies: 2°≤A≤8°; and / or, The effective part has an object-side effective diameter surface and an object-side connecting slope. The outer peripheral end of the object-side effective diameter surface is connected to the object-side end of the object-side connecting slope. The angle α between the object-side connecting slope and the optical axis satisfies: 10°≤a≤15°. The minimum distance ct0 between the object-side connecting slope and the lens barrel satisfies: 0.005mm≤ct0≤0.030mm.

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