Imaging lens, camera module and electronic device

Abstract

This invention provides an imaging lens having an optical axis and comprising a plastic lens barrel and an imaging lens assembly. The plastic lens barrel surrounds the optical axis. The plastic lens barrel includes an object-side side, an image-side side, an inner peripheral portion, and an outer peripheral portion. The object-side side and the image-side side are disposed opposite each other and are both substantially perpendicular to the optical axis. The inner peripheral portion and the outer peripheral portion connect the object-side side and the image-side side, with the outer peripheral portion being farther away from the optical axis than the inner peripheral portion. The inner peripheral portion has a parallel inner edge surface, while the outer peripheral portion has a first outer peripheral surface and a filling mark. The imaging lens assembly is disposed within the plastic lens barrel. The imaging lens assembly includes a plurality of imaging lens elements. At least one imaging lens element has an outer diameter greater than π. 2 Millimeters. At least one imaging lens element has its outer edge in solid contact with the parallel inner edge surface of its inner periphery. The first outer peripheral surface, the injection mark, and the parallel inner edge surface are sequentially arranged from the object side to the image side. The first outer peripheral surface tapers towards the object side. The present invention also provides a camera module having the above-described imaging lens and an electronic device having the camera module.

Description

[0001] This application is a divisional application. The original application was filed on March 12, 2020; the application number is 202010169171.2; and the invention title is: Imaging Lens, Camera Module and Electronic Device. Technical Field

[0002] This invention relates to an imaging lens, a camera module, and an electronic device, particularly an imaging lens and camera module suitable for electronic devices. Background Technology

[0003] With advancements in semiconductor technology, the performance of electronic image sensors has improved, allowing pixels to reach smaller sizes. Therefore, optical lenses with high image quality have become an indispensable component. Furthermore, as technology advances rapidly, the applications of electronic devices equipped with optical lenses are becoming more widespread, leading to more diverse requirements for these lenses.

[0004] Well-known optical lenses typically consist of injection-molded plastic lens barrels. This not only reduces production costs but also increases the design freedom of the inner wall surface to meet diverse needs. However, during the injection molding process, environmental factors can cause poor melt flow rate and insufficient holding pressure in the injected plastic. This can easily lead to problems such as insufficient roundness and flatness on the object or image sides of the lens barrel's internal wall assembly, as well as insufficient coaxiality during core assembly and overall structural strength. Therefore, improving the structure of injection-molded plastic lens barrels has become an important issue in the field of optics. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention discloses an imaging lens, camera module and electronic device that helps to improve the roundness, flatness, coaxiality of the core assembly and the overall structural strength of the plastic lens barrel, so as to obtain an optical lens with more durable, stronger and stable optical specifications that are not easily degraded.

[0006] This invention provides an imaging lens having an optical axis and comprising a plastic lens barrel and an imaging lens group. The plastic lens barrel surrounds the optical axis. The plastic lens barrel includes an object-side side, an image-side side, an inner peripheral portion, and an outer peripheral portion. The object-side side is substantially perpendicular to the optical axis. The image-side side is substantially perpendicular to the optical axis and is disposed opposite to the object-side side. The inner peripheral portion connects the object-side side and the image-side side, and has at least one parallel inner edge surface. The outer peripheral portion connects the object-side side and the image-side side, is farther from the optical axis than the inner peripheral portion, and has a first outer peripheral surface and at least three injection marks. The imaging lens group is disposed within the plastic lens barrel. The imaging lens group includes a plurality of imaging lens elements. One of the imaging lens elements has an outer diameter greater than π. 2Millimeters. One of the outer edges of the imaging lens element is in solid contact with the parallel inner edge surface of the inner periphery. The first outer peripheral surface, the injection mark, and the at least one parallel inner edge surface are arranged sequentially from the object side to the image side. The first outer peripheral surface tapers towards the object side. The angle between the first outer peripheral surface and the optical axis is α, which satisfies the following condition: 15 degrees ≤ α ≤ 55 degrees.

[0007] This invention provides another imaging lens having an optical axis and comprising a plastic lens barrel and an imaging lens group. The plastic lens barrel surrounds the optical axis. The plastic lens barrel includes an object-side side, an image-side side, an inner peripheral portion, and an outer peripheral portion. The object-side side is substantially perpendicular to the optical axis. The image-side side is substantially perpendicular to the optical axis and is disposed opposite to the object-side side. The inner peripheral portion connects the object-side side and the image-side side, and has at least one parallel inner edge surface. The outer peripheral portion connects the object-side side and the image-side side, is farther from the optical axis than the inner peripheral portion, and has a first outer peripheral surface and at least three injection marks. The imaging lens group is disposed within the plastic lens barrel. The imaging lens group includes a plurality of imaging lens elements. One of the imaging lens elements has an outer diameter greater than π. 2 Millimeters. One of the outer edges of the imaging lens element has solid contact with the parallel inner edge surface of the inner circumference. The first outer peripheral surface is closer to the object side than the injection mark, and the first outer peripheral surface tapers towards the object side. The angle between the first outer peripheral surface and the optical axis is α, the distance from the injection mark to the object side of the plastic lens barrel in the direction parallel to the optical axis is Lg, and the distance from the image side to the object side of the plastic lens barrel in the direction parallel to the optical axis is Lb, which satisfy the following conditions: 15 degrees ≤ α ≤ 55 degrees; and 0.2 <Lg / Lb<0.92。

[0008] The present invention provides a camera module comprising the above-described imaging lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging lens.

[0009] The present invention provides an electronic device comprising the above-described camera module.

[0010] According to the imaging lens, camera module, and electronic device disclosed in this invention, when α meets the above conditions, the melt flow rate of the plastic can be increased during the injection molding process, thereby improving the flatness of the side surface of the object; when Lg / Lb meets the above conditions, the plastic can be more uniform and stable during the molding and holding pressure stage, thereby maintaining the overall structural strength and roundness of the plastic lens barrel.

[0011] The foregoing description of the disclosure and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the present invention, and to provide a further explanation of the scope of the claims of the present invention. Attached Figure Description

[0012] Figure 1A perspective view of a camera module according to a first embodiment of the present invention is shown;

[0013] Figure 2 Draw Figure 1 An exploded view of the camera module;

[0014] Figure 3 Draw Figure 1 Another exploded view of the camera module;

[0015] Figure 4 Draw Figure 1 A magnified view of a portion of the AA region of the camera module;

[0016] Figure 5 Draw Figure 1 A top-view diagram of the camera module;

[0017] Figure 6 Draw Figure 1 A side view cross-sectional diagram of the camera module;

[0018] Figure 7 Draw Figure 6 An exploded view of the camera module;

[0019] Figure 8 Drawing formed in the injection mold Figure 1 A schematic diagram of the plastic lens barrel of the camera module;

[0020] Figure 9 Illustration of injection molding Figure 1 A three-dimensional schematic diagram of the plastic lens barrel of the camera module during the formation process, showing the direction of plastic flow.

[0021] Figure 10 Draw Figure 9 A cross-sectional schematic diagram of the plastic flow direction during the formation of the plastic lens barrel;

[0022] Figure 11 A perspective view of a camera module according to a second embodiment of the present invention is shown;

[0023] Figure 12 Draw Figure 11 A magnified view of a portion of the BB region of the camera module;

[0024] Figure 13 Draw Figure 11 A top-view diagram of the camera module;

[0025] Figure 14 Draw Figure 11 A side view cross-sectional diagram of the camera module;

[0026] Figure 15 Draw Figure 14An exploded view of the camera module;

[0027] Figure 16 Illustration of injection molding Figure 11 A three-dimensional schematic diagram of the plastic lens barrel of the camera module during the formation process, showing the direction of plastic flow.

[0028] Figure 17 Draw Figure 16 A cross-sectional schematic diagram of the plastic flow direction during the formation of the plastic lens barrel;

[0029] Figure 18 A perspective view of a camera module according to a third embodiment of the present invention is shown;

[0030] Figure 19 Draw Figure 18 A magnified view of a portion of the CC region of the camera module;

[0031] Figure 20 Draw Figure 18 A top-view diagram of the camera module;

[0032] Figure 21 Draw Figure 18 A side view cross-sectional diagram of the camera module;

[0033] Figure 22 Draw Figure 21 An exploded view of the camera module;

[0034] Figure 23 Illustration of injection molding Figure 18 A three-dimensional schematic diagram of the plastic lens barrel of the camera module during the formation process, showing the direction of plastic flow.

[0035] Figure 24 Draw Figure 23 A cross-sectional schematic diagram of the plastic flow direction during the formation of the plastic lens barrel;

[0036] Figure 25 A top view schematic diagram of a camera module according to a fourth embodiment of the present invention is shown;

[0037] Figure 26 Draw Figure 25 A side view cross-sectional diagram of the camera module;

[0038] Figure 27 A perspective view of a camera module according to a fifth embodiment of the present invention is shown;

[0039] Figure 28 A perspective view of an electronic device according to a sixth embodiment of the present invention is shown;

[0040] Figure 29 Draw Figure 28A three-dimensional schematic diagram of the other side of the electronic device;

[0041] Figure 30 Draw Figure 28 System block diagram of an electronic device.

[0042] Figure label:

[0043] 1, 2, 3, 4, 5, 5a, 5b, 5c: Camera modules

[0044] 10, 20, 30, 50: Imaging lenses

[0045] 11, 21, 31: Optical axis

[0046] 12, 22, 32: Plastic lens barrel

[0047] 120, 220, 320: Narrowed structure

[0048] 121, 221, 321: Side view of the object

[0049] 122, 222, 322: side view

[0050] 123, 223, 323: Inner peripheral region

[0051] 1231, 1231a, 1231b, 2231, 2231a, 3231, 3231a: Parallel inner edge surfaces

[0052] 1232, 2232, 3232: Tipped opening

[0053] 124, 224, 324: Peripheral part

[0054] 1241, 2241, 3241: First outer peripheral surface

[0055] 1242, 2242: Second outer peripheral surface

[0056] 1243: Third outer perimeter

[0057] 1244, 2244, 3244: Injection marks

[0058] 1244a, 2244a, 3244a: Cutting area

[0059] 2244b, 3244b: Injection defect area

[0060] 1245, 2245, 3245: Plane

[0061] 13, 23, 33: Imaging lens group

[0062] 131, 231, 331: Imaging lens elements

[0063] 131a, 231a, 331a: First lens

[0064] 131b, 231b, 331b: Second lens

[0065] 131c, 231c, 331c: Third lens

[0066] 131d, 231d, 331d: Fourth lens

[0067] 131e, 231e, 331e: Fifth lens

[0068] 131f, 231f, 331f: Sixth lens

[0069] 131g, 231g, 331g: The Seventh Lens

[0070] 331h: Eighth Lens

[0071] 132, 132a, 132b, 132c, 132d, 232, 232a, 232b, 232c, 232d, 332, 332a, 332b, 332c, 332d, 332e, 332f: Light-shielding elements

[0072] 133, 233, 233a, 233b, 333, 333a, 333b: Spacer rings

[0073] 134, 234, 334: Fixing rings

[0074] 18, 28, 38: Imaging planes

[0075] 19, 29, 39, 49, 52: Electronic photosensitive element

[0076] 47: Driver Module

[0077] 51: Drive unit

[0078] 53: Image Stabilization Module

[0079] 6: Electronic devices

[0080] 61: Flash module

[0081] 62: Focusing Assist Module

[0082] 63: Image Signal Processor

[0083] 64: User Interface

[0084] 65: Image Software Processor

[0085] 66: Subject

[0086] 9: Mold

[0087] 91: Injection port

[0088] 92: Narrowed flow channel

[0089] D11, D12, D21, D22, D31, D32: Arrows

[0090] L11, L12, L21, L31: Diameter

[0091] α: Angle between the first outer peripheral surface and the optical axis

[0092] Lb: The distance from the image-side surface to the object-side surface of the plastic lens barrel in a direction parallel to the optical axis.

[0093] Lg: Distance from the injection mark to the object-side surface of the plastic lens barrel in a direction parallel to the optical axis. Detailed Implementation

[0094] The following detailed description of the features and advantages of the present invention in the embodiments is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the disclosure of this specification, the scope of the claims, and the accompanying drawings, any person skilled in the art can easily understand the related objectives and advantages of the present invention. The following embodiments further illustrate the points of the present invention in detail, but are not intended to limit the scope of the present invention in any way.

[0095] This invention provides an imaging lens having an optical axis and comprising a plastic lens barrel and an imaging lens group. The plastic lens barrel is suitable for assembling an optical lens group with high resolution, and the imaging lens group is disposed within the plastic lens barrel. The plastic lens barrel can be made of black plastic material and can be manufactured by injection molding; thereby reducing light reflection inside the plastic lens barrel and reducing the production cost of the plastic lens barrel. The plastic lens barrel can be a non-threaded lens barrel; by eliminating the traditional threaded structure, the design of the injection molding mold can be simplified, thereby improving production efficiency. The plastic lens barrel can be fixed to the lens carrier by a gel or by a mutually engaging locking structure.

[0096] The plastic lens barrel surrounds the optical axis and includes an object-side side, an image-side side, an inner periphery, and an outer periphery. The object-side side is substantially perpendicular to the optical axis. The image-side side is substantially perpendicular to the optical axis and is positioned relative to the object-side side. The maximum outer diameter of the object-side side can be smaller than the maximum outer diameter of the image-side side; this facilitates the miniaturization of the imaging lens and further enhances the structural strength of the plastic lens barrel at the object-side and image-side sides.

[0097] The inner peripheral portion connects the side of the object to the side of the image. The inner peripheral portion has at least one parallel inner edge surface and may also have a pointed opening. The number of parallel inner edge surfaces may be at least six; thereby, the overall thickness of the plastic lens barrel wall can be made uniform, thereby increasing the consistency of plastic flow during injection molding.

[0098] The diameter of at least one parallel inner edge surface can be greater than π. 2 The diameter is millimeters, where π is the mathematical constant pi; this effectively reduces the probability of stray light generation. A pointed aperture allows light to enter the imaging lens group, and the pointed aperture can be positioned closer to the object side than the parallel inner edge.

[0099] The outer peripheral portion connects the object side and the image side. The outer peripheral portion is farther from the optical axis than the inner peripheral portion, and the outer peripheral portion has a first outer peripheral surface and at least three injection marks. The first outer peripheral surface may be closer to the object side than the injection marks. The first outer peripheral surface, the injection marks, and at least one parallel inner edge surface may be arranged sequentially from the object side to the image side.

[0100] The first outer peripheral surface tapers towards the side of the object; this reduces the likelihood of interference between the plastic lens barrel and the mold. The first outer peripheral surface can be a truncated cone with a taper; this reduces resistance when the plastic lens barrel leaves the mold after injection molding, increasing the quality stability of the plastic lens barrel during production. Furthermore, it increases the melt flow rate of the plastic during injection molding, resulting in a more complete surface structure on the side of the plastic lens barrel, thereby improving the manufacturing yield of injection molding. The taper of the first outer peripheral surface can be more inclined than the release angle required by the injection mold; this allows for a better melt flow rate of the plastic during injection molding, thereby increasing production speed and capacity.

[0101] Injection marks are created during the injection process to accommodate the centrally located injection port. This helps maintain filler pressure on the inner circumference of the plastic during injection molding, improving the roundness of the parallel inner edge surfaces, thereby reducing assembly misalignment and increasing internal coaxiality. Please refer to... Figures 8 to 10 The diagram illustrates a molding process with injection marks 1244 according to the first embodiment of the present invention, where arrows D11 and D12 indicate the flow direction of the plastic during molding. Figures 8 to 10 As shown, during the injection process, the plastic first fills and accumulates on the object side 122 (i.e., in the direction of arrow D11), and then fills along the first outer peripheral surface 1241 towards the object side 121 (i.e., in the direction of arrow D12). Furthermore, as... Figure 10As shown, a narrowed flow channel 92 can also be provided on the flow channel towards the object side 121 (i.e., in the direction of arrow D12) to make the plastic flow rate and direction more stable. In this way, the area near the image side will be filled with plastic first, so that the plastic can be more uniform and stable during the molding and holding pressure stage, and further improve the sphericity of the parallel inner edge surface near the image side, avoiding the eccentricity of the lens during assembly. However, the present invention is not limited thereto. Please refer to Figures 23 to 24 The diagram illustrates a molding process with injection marks 3244 according to the third embodiment of the present invention, where arrows D31 and D32 indicate the flow direction of the plastic during molding. Figures 23 to 24 As shown, the plastic can also be filled and deposited first on the object side 321 (i.e., in the direction of arrow D31), and then filled consistently on the image side 322 (i.e., in the direction of arrow D32), and the narrowed flow channel can be set on the flow channel on the image side 322.

[0102] The appearance of the injection mark can be quadrilateral, trapezoidal, semi-circular, elliptical, or circular. Please refer to [reference needed]. Figure 4 The diagram illustrates the appearance of the injection mark 1244 according to the first embodiment of the present invention, wherein the injection mark 1244 in this embodiment is trapezoidal, but the present invention is not limited thereto. Please refer to... Figure 19 The diagram illustrates the appearance of the injection mark 3244 according to the third embodiment of the present invention, wherein the injection mark 1244 in this embodiment is semi-elliptical.

[0103] The surface properties of the injection mark may differ from those of the surrounding area. The injection mark may include a cutting trace area and an injection defect area, and the surface appearance of the cutting trace area and the injection defect area is significantly different from that of the surrounding area. It is worth noting that during the injection molding demolding process, if the plastic has not completely cooled down, injection defect areas are easily formed on the injection mark. In contrast, this invention provides fast and highly consistent injection quality. Although the high temperature during demolding makes it easier for injection defect areas to form on the injection mark, this is a normal phenomenon and will not affect dimensional accuracy; in fact, it can shorten molding time and improve production efficiency.

[0104] The injection marks can exhibit axisymmetric similarity to the optical axis; this increases the uniformity of the plastic lens barrel, balancing the stress distribution within the plastic and thus stabilizing the center of gravity of the imaging lens. Please refer to... Figure 5 The diagram illustrates the location of the injection marks 1244 according to the first embodiment of the present invention. In this embodiment, there are three injection marks 1244, which are axially symmetrical about the optical axis 11. However, the present invention is not limited thereto. Please refer to... Figure 13The diagram illustrates the location of the injection marks 2244 according to the second embodiment of the present invention. In this embodiment, there are four injection marks 2244, which are axially symmetrical with respect to the optical axis 21. The outer periphery may have at least three planes, and the at least three injection marks are respectively disposed on the at least three planes; thereby, interference between the injection marks and external components at the outer periphery can be avoided.

[0105] The imaging lens group comprises multiple imaging lens elements. The number of imaging lens elements can be at least six, thereby providing an optical imaging system with high optical quality.

[0106] One of the imaging lens elements has an outer diameter greater than π. 2 Millimeters; thereby, the imaging lens group can accommodate a larger lens surface within a limited space, thus more efficiently correcting aberrations and providing a high-resolution imaging lens. The outer diameter of the imaging lens element closest to the image side can be greater than π. 2 Millimeters. The outer diameter of each of the two imaging lens elements closest to the image side can be greater than π. 2 Millimeters.

[0107] One of the outer edges of the imaging lens element has solid contact with the parallel inner edge surface of the inner circumference. At least a portion of the parallel inner edge surface and the imaging lens element can fit tightly together. Through the high-precision parallel inner edge surface, the plastic lens barrel can fit tightly with the imaging lens element, giving the imaging lens group good coaxiality and thus providing high optical resolution. The parallel inner edge surface and the outer circumference of one of the imaging lens elements can be designed to have the same diameter and can be coaxially assembled. This maintains the coaxiality between the large-diameter imaging lens element and the plastic lens barrel and prevents deformation of the large-diameter imaging lens element during assembly, thereby maintaining high-resolution imaging quality.

[0108] The mold shrinkage of either the plastic lens barrel or the imaging lens element can be less than 0.7%, which can be defined by the following formula: (mold size - molded part size) ÷ mold size × 100%. Through low-deformation structural design, manufacturing precision can be improved, resulting in a better fit between the assembled dimensions of the plastic lens barrel and the imaging lens element; however, the mold shrinkage is not limited to this value. Furthermore, the dimensional manufacturing tolerances of the parallel inner edge surfaces of both the imaging lens element and the plastic lens barrel can be controlled within a range of less than 2 μm.

[0109] The materials applicable to the plastic lens barrel can be Polycarbonate (PC), Polyamide (PA), Liquid crystal polymer (LCP), etc., and the materials applicable to the imaging lens element can be Polycarbonate (PC), Cyclic olefin polymer (COP), etc.; thereby, the dimensional differences between finished products can be reduced during the molding process. However, the applicable materials are not limited to the above materials and can also be composite materials or doped with glass fiber.

[0110] The angle between the first outer peripheral surface and the optical axis is α, which can satisfy the following condition: 5° ≤ α ≤ 65°; thereby, the melt flow rate of the plastic can be increased during the injection process of injection molding, and further, the flatness of the object side can be improved. Among them, it can also satisfy the following condition: 15° ≤ α ≤ 55°; thereby, the melt flow rate of the plastic can be further increased, making the overall structure on the object side more complete. Please refer to Figure 7 , which is a schematic diagram showing the angle α between the first outer peripheral surface 1241 and the optical axis 11 in the first embodiment of the present invention.

[0111] The distance between the injection mark and the object side of the plastic lens barrel in the direction parallel to the optical axis is Lg, and the distance between the image side and the object side of the plastic lens barrel in the direction parallel to the optical axis is Lb, which can satisfy the following condition: 0.2 < Lg / Lb < 0.92; thereby, the plastic can be more uniform and stable during the molding holding stage, and further, the overall structural strength and roundness of the plastic lens barrel can be maintained. Among them, it can also satisfy the following condition: 0.33 < Lg / Lb < 0.85; thereby, the overall structural strength and roundness of the plastic lens barrel can be more balanced. Among them, it can also satisfy the following condition: 0.5 ≤ Lg / Lb ≤ 0.75; thereby, the injection port can be placed in the middle and closer to the image side range, which helps to make the plastic streamline parallel to the inner peripheral surface more stable during the molding of the plastic lens barrel, and it is not easy to residual stress after the plastic lens barrel is demolded, so as to avoid warpage. Please refer to Figure 7 , which is a schematic diagram showing the distance Lg between the injection mark 1244 and the object side 121 of the plastic lens barrel 12 in the direction parallel to the optical axis 11 and the distance Lb between the image side 122 and the object side 121 of the plastic lens barrel 12 in the direction parallel to the optical axis 11 in the first embodiment of the present invention.

[0112] The distance between the image side and the object side of the plastic lens barrel in the direction parallel to the optical axis is Lb, which can satisfy the following condition: 5 [mm] < Lb < 15 [mm]. Thereby, an appropriate accommodation space can be provided for the imaging lens group with high optical specifications, which is conducive to cooperating with the high-pixel electronic photosensitive element.

[0113] This invention provides a camera module comprising an imaging lens and an electronic image sensor, wherein the electronic image sensor is disposed on an imaging surface of the imaging lens. The camera module may further include a driver module; thereby, autofocus and optical image stabilization can be achieved.

[0114] The present invention provides an electronic device comprising the above-described camera module.

[0115] The various technical features in the imaging lens of the present invention can be combined and configured to achieve the corresponding effects.

[0116] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0117] <First Embodiment>

[0118] Please refer to Figures 1 to 10 ,in Figure 1 A perspective view of a camera module according to a first embodiment of the present invention is shown. Figure 2 Draw Figure 1 An exploded view of the camera module. Figure 3 Draw Figure 1 Another exploded view of the camera module, Figure 4 Draw Figure 1 A magnified view of a portion of the AA region of the camera module. Figure 5 Draw Figure 1 A top-view diagram of the camera module. Figure 6 Draw Figure 1 A side cross-sectional view of the camera module. Figure 7 Draw Figure 6 An exploded view of the camera module. Figure 8 Drawing formed in the injection mold Figure 1 A schematic diagram of the plastic lens barrel of the camera module. Figure 9 Illustration of injection molding Figure 1 A three-dimensional schematic diagram showing the direction of plastic flow during the formation of the plastic lens barrel of the camera module. Figure 10 Draw Figure 9 A cross-sectional diagram showing the direction of plastic flow during the formation of a plastic lens barrel.

[0119] In this embodiment, the camera module 1 includes an imaging lens 10 and an electronic image sensor 19. The imaging lens 10 has an optical axis 11 and an imaging surface 18, and the electronic image sensor 19 is disposed on the imaging surface 18. The imaging lens 10 includes a plastic lens barrel 12 and an imaging lens group 13. Both the plastic lens barrel 12 and the imaging lens group 13 are located in the object-side direction of the electronic image sensor 19, and the imaging lens group 13 is disposed in the plastic lens barrel 12.

[0120] The plastic lens barrel 12 is a threadless lens barrel made of black plastic material by injection molding, and is fixed to the lens carrier (not shown) of the camera module 1 by adhesive. During the injection molding process, the plastic enters the mold 9 through the injection port 91 of the mold 9. The plastic first fills and accumulates towards the image side in the direction of arrow D11, and then fills towards the object side in the direction of arrow D12. The mold 9 is provided with a narrow runner 92 in the direction of arrow D12, so that the plastic lens barrel 12 has a corresponding narrow structure 120 after molding.

[0121] The plastic lens barrel 12 surrounds the optical axis 11 and includes an object-side surface 121, an image-side surface 122, an inner peripheral portion 123, and an outer peripheral portion 124. The object-side surface 121 is substantially perpendicular to the optical axis 11. The image-side surface 122 is substantially perpendicular to the optical axis 11 and is disposed relative to the object-side surface 121. The maximum outer diameter of the object-side surface 121 is smaller than the maximum outer diameter of the image-side surface 122.

[0122] The inner peripheral portion 123 connects the object side 121 and the image side 122, and is located between the object side 121 and the image side 122. The inner peripheral portion 123 has nine parallel inner edge surfaces 1231 and a pointed opening 1232.

[0123] Among the nine parallel inner edge surfaces 1231, the diameters L11 and L12 of two parallel inner edge surfaces 1231a and 1231b are both greater than π. 2 Millimeters. Specifically, the diameter L11 of the parallel inner edge surface 1231a is 10.58 millimeters, while the diameter L12 of the parallel inner edge surface 1231b is 10 millimeters. The tip opening 1232 is closer to the object side surface 121 than the parallel inner edge surface 1231.

[0124] The outer peripheral portion 124 connects the object side 121 and the image side 122, and is located between the object side 121 and the image side 122. The outer peripheral portion 124 is farther away from the optical axis 11 than the inner peripheral portion 123. The outer peripheral portion 124 has a first outer peripheral surface 1241, a second outer peripheral surface 1242, a third outer peripheral surface 1243, three injection marks 1244, and three planes 1245. The tip opening 1232, the first outer peripheral surface 1241, the second outer peripheral surface 1242, the third outer peripheral surface 1243, the planes 1245, the injection marks 1244, the parallel inner edge surface 1231b, and the parallel inner edge surface 1231a are respectively arranged sequentially from the object side to the image side.

[0125] The first outer peripheral surface 1241 gradually tapers towards the object side 121. Specifically, the first outer peripheral surface 1241 is a truncated conical surface with a taper.

[0126] The position of the injection mark 1244 corresponds to the position of the injection port 91. Specifically, the injection marks 1244 are respectively arranged on the plane 1245 and are axially symmetrical with respect to the optical axis 11.

[0127] The appearance of the injection mark 1244 corresponds to the shape of the injection port 91. Specifically, the injection mark 1244 is trapezoidal in shape and includes a cutting area 1244a. The surface appearance of the cutting area 1244a is significantly different from the surface appearance of the surrounding plane 1245.

[0128] The imaging lens group 13 includes seven imaging lens elements 131, four light-shielding elements 132, a spacer ring 133, and a fixing ring 134. Specifically, the imaging lens group 13 includes, from the object side to the image side, a first lens 131a, a second lens 131b, a light-shielding element 132a, a third lens 131c, a light-shielding element 132b, a fourth lens 131d, a light-shielding element 132c, a fifth lens 131e, a spacer ring 133, a sixth lens 131f, a light-shielding element 132d, a seventh lens 131g, and a fixing ring 134.

[0129] The outer edges of each of the seven imaging lens elements 131 are in solid contact with at least a portion of the seven parallel inner edge surfaces 1231 of the inner periphery 123 in a close fit. Specifically, the seven parallel inner edge surfaces 1231 and the outer peripheries of the seven imaging lens elements 131 are designed to have the same diameter and are coaxially assembled. For example, the outer diameter of the sixth lens 131f is the same as the diameter L12 of the parallel inner edge surface 1231b, both being 10 mm; while the outer diameter of the seventh lens 131g is the same as the diameter L11 of the parallel inner edge surface 1231a, both being 10.58 mm.

[0130] To achieve the aforementioned close fit, the molding shrinkage rate of both the plastic lens barrel 12 and the imaging lens element 131 must be less than 0.7%, so that the dimensional manufacturing tolerances of the parallel inner edge surface 1231 of the imaging lens element 131 and the plastic lens barrel 12 are controlled within 2μm.

[0131] The angle between the first outer peripheral surface 1241 and the optical axis 11 is α, which satisfies the following condition: α = 21 degrees.

[0132] The distance from the injection mark 1244 to the object side 121 of the plastic lens barrel 12 in the direction parallel to the optical axis 11 is Lg, and the distance from the image side 122 of the plastic lens barrel 12 to the object side 121 in the direction parallel to the optical axis 11 is Lb, which satisfies the following condition: Lg / Lb=0.61.

[0133] The distance between the image-side surface 122 and the object-side surface 121 of the plastic lens barrel 12 in the direction parallel to the optical axis 11 is Lb, which satisfies the following condition: Lb = 6.97 mm.

[0134] <Second Embodiment>

[0135] Please refer to Figures 11 to 17,in Figure 11 A perspective view of a camera module according to a second embodiment of the present invention is shown. Figure 12 Draw Figure 11 A magnified view of a portion of the BB region of the camera module. Figure 13 Draw Figure 11 A top-view diagram of the camera module. Figure 14 Draw Figure 11 A side cross-sectional view of the camera module. Figure 15 Draw Figure 14 An exploded view of the camera module. Figure 16 Illustration of injection molding Figure 11 A three-dimensional schematic diagram showing the direction of plastic flow during the formation of the plastic lens barrel of the camera module. Figure 17 Draw Figure 16 A cross-sectional schematic diagram of the plastic lens barrel during its formation process, showing the direction of plastic flow. The following description focuses only on the differences between the second embodiment and the foregoing embodiments; other similarities will be omitted.

[0136] In this embodiment, the camera module 2 includes an imaging lens 20 and an electronic image sensor 29. The imaging lens 20 has an optical axis 21 and an imaging surface 28, and the electronic image sensor 29 is disposed on the imaging surface 28. The imaging lens 20 includes a plastic lens barrel 22 and an imaging lens group 23. Both the plastic lens barrel 22 and the imaging lens group 23 are located in the object-side direction of the electronic image sensor 29, and the imaging lens group 23 is disposed in the plastic lens barrel 22.

[0137] The plastic lens barrel 22 is a threadless lens barrel made of black plastic material by injection molding, and is fixed to the lens carrier (not shown) of the camera module 2 by interlocking structures (not shown). During the injection molding process, the plastic is first filled and piled up in the mold along the direction of arrow D21 towards the image side, and then filled along the direction of arrow D22 towards the object side. The mold is provided with a narrow runner in the direction of arrow D22, so that the plastic lens barrel 22 has a corresponding narrow structure 220 after molding.

[0138] The plastic lens barrel 22 surrounds the optical axis 21 and includes an object-side surface 221, an image-side surface 222, an inner peripheral portion 223, and an outer peripheral portion 224. The object-side surface 221 is substantially perpendicular to the optical axis 21. The image-side surface 222 is substantially perpendicular to the optical axis 21 and is disposed relative to the object-side surface 221. The maximum outer diameter of the object-side surface 221 is smaller than the maximum outer diameter of the image-side surface 222.

[0139] The inner peripheral portion 223 connects the object side surface 221 and the image side surface 222, and is located between the object side surface 221 and the image side surface 222. The inner peripheral portion 223 has ten parallel inner edge surfaces 2231 and a pointed opening 2232.

[0140] Among the ten parallel inner edge surfaces 2231, the diameter L21 of the parallel inner edge surface 2231a is greater than π. 2 Millimeters. Specifically, the diameter L21 of the parallel inner edge surface 2231a is 10.59 millimeters. The tip opening 2232 is closer to the object side surface 221 than the parallel inner edge surface 2231.

[0141] The outer peripheral portion 224 connects the object side 221 and the image side 222, and is located between the object side 221 and the image side 222. The outer peripheral portion 224 is farther from the optical axis 21 than the inner peripheral portion 223. The outer peripheral portion 224 has a first outer peripheral surface 2241, a second outer peripheral surface 2242, four injection marks 2244, and four planes 2245. The tip opening 2232, the first outer peripheral surface 2241, the second outer peripheral surface 2242, the injection marks 2244, the planes 2245, and the parallel inner edge surface 2231a are arranged sequentially from the object side to the image side.

[0142] The first outer peripheral surface 2241 gradually tapers towards the object side 221. Specifically, the first outer peripheral surface 2241 is a truncated conical surface with a taper.

[0143] The injection marks 2244 are respectively arranged on the plane 2245 and are axially symmetrical to the optical axis 21.

[0144] The injection mark 2244 is circular and protruding, and includes a cutting area 2244a and an injection defect area 2244b. The surface appearance of the cutting area 2244a and the injection defect area 2244b is significantly different from the surface appearance of the surrounding plane 2245.

[0145] The imaging lens group 23 includes seven imaging lens elements 231, four light-shielding elements 232, two spacer rings 233, and one fixing ring 234. Specifically, the imaging lens group 23 includes, from the object side to the image side, a first lens 231a, a second lens 231b, a light-shielding element 232a, a third lens 231c, a light-shielding element 232b, a fourth lens 231d, a light-shielding element 232c, a fifth lens 231e, a spacer ring 233a, a sixth lens 231f, a spacer ring 233b, a light-shielding element 232d, a seventh lens 231g, and a fixing ring 234.

[0146] The outer edges of each of the seven imaging lens elements 231 are in solid contact with at least a portion of the seven parallel inner edge surfaces 2231 of the inner periphery 223 in a close fit. Specifically, the seven parallel inner edge surfaces 2231 and the outer peripheries of the seven imaging lens elements 231 are designed to have the same diameter and are coaxially assembled. For example, the outer diameter of the seventh lens 231g is the same as the diameter L21 of the parallel inner edge surface 2231a, both being 10.59 mm.

[0147] To achieve the aforementioned close fit, the molding shrinkage rate of both the plastic lens barrel 22 and the imaging lens element 231 must be less than 0.7%, so that the dimensional manufacturing tolerances of the parallel inner edge surfaces 2231 of the imaging lens element 231 and the plastic lens barrel 22 are controlled within 2μm.

[0148] The angle between the first outer peripheral surface 2241 and the optical axis 21 is α, which satisfies the following condition: α = 18 degrees.

[0149] The distance from the injection mark 2244 to the object side 221 of the plastic lens barrel 22 in the direction parallel to the optical axis 21 is Lg, and the distance from the image side 222 of the plastic lens barrel 22 to the object side 221 in the direction parallel to the optical axis 21 is Lb, which satisfies the following condition: Lg / Lb=0.59.

[0150] The distance from the image side 222 to the object side 221 of the plastic lens barrel 22 in the direction parallel to the optical axis 21 is Lb, which satisfies the following condition: Lb = 6.83 [mm].

[0151] <Third Embodiment>

[0152] Please refer to Figures 18 to 24 ,in Figure 18 A perspective view of a camera module according to a third embodiment of the present invention is shown. Figure 19 Draw Figure 18 A magnified view of a portion of the CC region of the camera module. Figure 20 Draw Figure 18 A top-view diagram of the camera module. Figure 21 Draw Figure 18 A side cross-sectional view of the camera module. Figure 22 Draw Figure 21 An exploded view of the camera module. Figure 23 Illustration of injection molding Figure 18 A three-dimensional schematic diagram showing the direction of plastic flow during the formation of the plastic lens barrel of the camera module. Figure 24 Draw Figure 23 A cross-sectional schematic diagram of the plastic lens barrel during its formation process, showing the direction of plastic flow. The following description focuses only on the differences between the third embodiment and the foregoing embodiments; other similarities will be omitted.

[0153] In this embodiment, the camera module 3 includes an imaging lens 30 and an electronic image sensor 39. The imaging lens 30 has an optical axis 31 and an imaging surface 38, and the electronic image sensor 39 is disposed on the imaging surface 38. The imaging lens 30 includes a plastic lens barrel 32 and an imaging lens group 33. Both the plastic lens barrel 32 and the imaging lens group 33 are located in the object-side direction of the electronic image sensor 39, and the imaging lens group 33 is disposed in the plastic lens barrel 32.

[0154] The plastic lens barrel 32 is a threadless lens barrel made of black plastic material by injection molding, and is fixed to the lens carrier (not shown) of the camera module 3 by adhesive. During the injection molding process, the plastic is first filled and accumulated in the mold along the direction of arrow D31 towards the object side, and then filled along the direction of arrow D32 towards the image side. The mold is provided with a narrow runner in the direction of arrow D32, so that the plastic lens barrel 32 has a corresponding narrow structure 320 after molding.

[0155] The plastic lens barrel 32 surrounds the optical axis 31 and includes an object-side surface 321, an image-side surface 322, an inner peripheral portion 323, and an outer peripheral portion 324. The object-side surface 321 is substantially perpendicular to the optical axis 31. The image-side surface 322 is substantially perpendicular to the optical axis 31 and is disposed relative to the object-side surface 321. The maximum outer diameter of the object-side surface 321 is smaller than the maximum outer diameter of the image-side surface 322.

[0156] The inner peripheral portion 323 connects the object side surface 321 and the image side surface 322, and is located between the object side surface 321 and the image side surface 322. The inner peripheral portion 323 has eleven parallel inner edge surfaces 3231 and a pointed opening 3232.

[0157] Among the eleven parallel inner edge surfaces 3231, the diameter L31 of the parallel inner edge surface 3231a is greater than π. 2 Millimeters. Specifically, the diameter L31 of the parallel inner edge surface 3231a is 10.6 millimeters. The tip opening 3232 is closer to the object side surface 321 than the parallel inner edge surface 3231.

[0158] The outer peripheral portion 324 connects the object side 321 and the image side 322, and is located between the object side 321 and the image side 322. The outer peripheral portion 324 is farther from the optical axis 31 than the inner peripheral portion 323. The outer peripheral portion 324 has a first outer peripheral surface 3241, four injection marks 3244, and four planes 3245. The tip opening 3232, the first outer peripheral surface 3241, the planes 3245, the injection marks 3244, and the parallel inner edge surface 3231a are arranged sequentially from the object side to the image side.

[0159] The first outer peripheral surface 3241 gradually tapers towards the object side surface 321. Specifically, the first outer peripheral surface 3241 is a truncated conical surface with a taper.

[0160] The injection marks 3244 are respectively arranged on the plane 3245 and are axially symmetrical with respect to the optical axis 31.

[0161] The injection mark 3244 is semi-elliptical in shape and includes a cut area 3244a and an injection defect area 3244b. The surface appearance of the cut area 3244a and the injection defect area 3244b is significantly different from the surface appearance of the surrounding plane 3245.

[0162] The imaging lens group 33 includes eight imaging lens elements 331, six light-shielding elements 332, two spacer rings 333, and one fixing ring 334. Specifically, the imaging lens group 33 includes, from the object side to the image side, a first lens 331a, a second lens 331b, a light-shielding element 332a, a third lens 331c, a light-shielding element 332b, a fourth lens 331d, a light-shielding element 332c, a fifth lens 331e, a light-shielding element 332d, a sixth lens 331f, a spacer ring 333a, a seventh lens 331g, a light-shielding element 332e, a spacer ring 333b, a light-shielding element 332f, an eighth lens 331h, and a fixing ring 334.

[0163] The outer edges of each of the eight imaging lens elements 331 are in physical contact with at least a portion of the eight parallel inner edge surfaces 3231 of the inner periphery 323 in a close fit. Specifically, the eight parallel inner edge surfaces 3231 and the outer peripheries of the eight imaging lens elements 331 are designed to have the same diameter and are coaxially assembled. For example, the outer diameter of the eighth lens 331h is the same as the diameter L31 of the parallel inner edge surface 3231a, both being 10.6 mm.

[0164] To achieve the aforementioned close fit, the molding shrinkage rate of both the plastic lens barrel 32 and the imaging lens element 331 must be less than 0.7%, so that the dimensional manufacturing tolerances of the parallel inner edge surfaces 3231 of the imaging lens element 331 and the plastic lens barrel 32 are controlled within 2μm.

[0165] The angle between the first outer peripheral surface 3241 and the optical axis 31 is α, which satisfies the following condition: α = 18 degrees.

[0166] The distance from the injection mark 3244 to the object side 321 of the plastic lens barrel 32 in the direction parallel to the optical axis 31 is Lg, and the distance from the image side 322 of the plastic lens barrel 32 to the object side 321 in the direction parallel to the optical axis 31 is Lb, which satisfies the following condition: Lg / Lb=0.36.

[0167] The distance between the image side 322 and the object side 321 of the plastic lens barrel 32 in the direction parallel to the optical axis 31 is Lb, which satisfies the following condition: Lb = 7.02 [mm].

[0168] <Fourth Embodiment>

[0169] Please refer to Figures 25 to 26 ,in Figure 25 A top view schematic diagram of a camera module according to a fourth embodiment of the present invention is shown. Figure 26 Draw Figure 25 A side cross-sectional view of the camera module. The following description focuses only on the differences between the fourth embodiment and the foregoing embodiments; all other similarities will be omitted.

[0170] In this embodiment, the camera module 4 includes an imaging lens 30, a driver module 47, and an electronic photosensitive element 49, as described in the third embodiment. The driver module 47 is disposed on the imaging lens 30, and the electronic photosensitive element 49 is disposed on the imaging surface 38 of the imaging lens 30.

[0171] <Fifth Embodiment>

[0172] Please refer to Figure 27 This diagram illustrates a perspective view of a camera module according to a fifth embodiment of the present invention. In this embodiment, the camera module 5 includes an imaging lens 50, a driving device 51, an electronic photosensitive element 52, and an image stabilization module 53. The imaging lens 50 is, for example, the same as the imaging lens 10 of the first embodiment described above, and includes a plastic lens barrel 12 for supporting the imaging lens group 13 and a support device (Holder Member, not otherwise labeled). The camera module 5 may also be configured with imaging lenses from other embodiments, and the present invention is not limited thereto. The camera module 5 uses the imaging lens 50 to focus light to generate an image, and works with the driving device 51 to focus the image, finally imaging it onto the electronic photosensitive element 52 and outputting it as image data.

[0173] The drive unit 51 may have an auto-focus function, and its driving method can use drive systems such as voice coil motors (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The drive unit 51 allows the imaging lens 50 to achieve a better imaging position, enabling clear images of the subject at different object distances. In addition, the camera module 5 is equipped with a high-sensitivity and low-noise electronic image sensor 52 (such as CMOS or CCD) located on the imaging surface of the imaging lens 50, which can truly present the good image quality of the imaging lens 50.

[0174] The image stabilization module 53 may be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 51 may work in conjunction with the image stabilization module 53 to form an optical image stabilization (OIS) device. By adjusting the changes in different axes of the imaging lens 50, it can compensate for the blurry image caused by shaking during shooting, or utilize image compensation technology in the imaging software to provide electronic image stabilization (EIS), further improving the image quality of shooting in dynamic and low-light scenes.

[0175] <Sixth Embodiment>

[0176] Please refer to Figures 28 to 30 ,in Figure 28 A perspective schematic diagram of an electronic device according to a sixth embodiment of the present invention is shown. Figure 29 Draw Figure 28 A three-dimensional diagram of the other side of the electronic device. Figure 30 Draw Figure 28 System block diagram of an electronic device.

[0177] In this embodiment, the electronic device 6 is a smartphone. The electronic device 6 includes, according to the fifth embodiment, a camera module 5, camera module 5a, camera module 5b, camera module 5c, flash module 61, focus assist module 62, image signal processor 63, user interface 64, and image software processor 65. Camera module 5c and user interface 64 are located on the same side, while camera modules 5, 5a, and 5b are located on opposite sides of user interface 64. Camera modules 5, 5a, and 5b face the same direction and are all single-focus. Furthermore, camera modules 5a, 5b, and 5c all have a structural configuration similar to camera module 5. Specifically, each of camera modules 5a, 5b, and 5c includes an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. Each imaging lens of camera modules 5a, 5b, and 5c includes a lens group, a lens barrel for supporting the lens group, and a support device.

[0178] In this embodiment, camera modules 5, 5a, and 5b have different viewing angles (wherein, camera module 5 is a standard image-capturing device, camera module 5a is a telephoto image-capturing device, and camera module 5b is a wide-angle image-capturing device), enabling the electronic device 6 to provide different magnifications to achieve optical zoom shooting effects. The above-described electronic device 6 is exemplified by including multiple camera modules 5, 5a, 5b, and 5c, but the number and configuration of camera modules are not intended to limit the invention.

[0179] When the user photographs the subject 66, the electronic device 6 uses camera module 5, camera module 5a, or camera module 5b to focus the light and capture an image, activates flash module 61 for supplemental lighting, and uses the subject distance information provided by focus assist module 62 for fast focusing. Image signal processor 63 then performs image optimization processing to further improve the image quality produced by the imaging lens. Focus assist module 62 can use an infrared or laser focus assist system to achieve fast focusing. Additionally, the electronic device 6 can also use camera module 5c for shooting. The user interface 64 can use a touchscreen or physical shooting button, combined with the diverse functions of image software processor 65 for image shooting and processing. The image processed by image software processor 65 can be displayed on user interface 64.

[0180] The camera modules 1-5 of this invention are not limited to applications in smartphones. Camera modules 1-5 can also be applied to mobile focusing systems as needed, and feature excellent aberration correction and good image quality. For example, camera modules 1-5 can be widely used in electronic devices such as 3D image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of this invention and do not limit the scope of application of the camera modules of this invention.

Claims

1. An imaging lens, characterized in that, Having an optical axis, the imaging lens comprises: A plastic lens barrel, surrounding the optical axis, the plastic lens barrel comprising: The side view of an object is essentially perpendicular to the optical axis; An image side is substantially perpendicular to the optical axis, and the image side is positioned relative to the side of the object; An inner periphery connecting the side surface of the object and the side surface of the image, and the inner periphery having at least one parallel inner edge surface; and An outer peripheral portion connecting the side of the object and the side of the image, the outer peripheral portion being farther from the optical axis than the inner peripheral portion, and the outer peripheral portion having a first outer peripheral surface and at least three injection marks; and An imaging lens group is disposed in the plastic lens barrel, and the imaging lens group includes: Multiple imaging lens elements, one of which has an outer diameter greater than π. 2 The outer edge of one of the plurality of imaging lens elements is in solid contact with the at least one parallel inner edge surface of the inner periphery, where π is the mathematical constant pi. The first outer peripheral surface, the at least three injection marks, and the at least one parallel inner edge surface are respectively arranged sequentially from the object side to the image side; Wherein, the first outer peripheral surface gradually tapers towards the object side, and the angle between the first outer peripheral surface and the optical axis is α; the distance from the at least three injection marks to the object side of the plastic lens barrel in a direction parallel to the optical axis is Lg; and the distance from the image side of the plastic lens barrel to the object side in a direction parallel to the optical axis is Lb, satisfying the following conditions: 15 degrees ≤ α ≤ 55 degrees; and 0.33 < Lg / Lb < 0.

85.

2. The imaging lens as described in claim 1, characterized in that, The at least three injection marks should be axially symmetrical about the optical axis.

3. The imaging lens as described in claim 2, characterized in that, The outer periphery has at least three planes, and the at least three injection marks are respectively disposed on the at least three planes.

4. The imaging lens as described in claim 1, characterized in that, The maximum outer diameter of the object's side is smaller than the maximum outer diameter of the image's side.

5. The imaging lens as described in claim 1, characterized in that, The plastic lens barrel is a threadless lens barrel.

6. The imaging lens as described in claim 1, characterized in that, The plastic lens barrel is made of black plastic material and is manufactured by injection molding, and the diameter of at least one parallel inner edge surface of the inner circumference of the plastic lens barrel is greater than π. 2 Millimeters.

7. The imaging lens as described in claim 6, characterized in that, The at least one parallel inner edge surface is in close contact with at least a portion of one of the plurality of imaging lens elements.

8. A camera module, characterized in that, Include: The imaging lens as described in claim 1; and An electronic photosensitive element is disposed on an imaging surface of the imaging lens.

9. An electronic device, characterized in that, Include: The camera module as described in claim 8.

10. An imaging lens, characterized in that, Having an optical axis, the imaging lens comprises: A plastic lens barrel, surrounding the optical axis, the plastic lens barrel comprising: The side view of an object is essentially perpendicular to the optical axis; An image side is substantially perpendicular to the optical axis, and the image side is positioned relative to the side of the object; An inner periphery connecting the side surface of the object and the side surface of the image, and the inner periphery having at least one parallel inner edge surface; and An outer peripheral portion connecting the side of the object and the side of the image, the outer peripheral portion being farther from the optical axis than the inner peripheral portion, and the outer peripheral portion having a first outer peripheral surface and at least three injection marks; and An imaging lens group is disposed in the plastic lens barrel, and the imaging lens group includes: Multiple imaging lens elements, one of which has an outer diameter greater than π. 2 The outer edge of one of the plurality of imaging lens elements is in solid contact with the at least one parallel inner edge surface of the inner periphery, where π is the mathematical constant pi. Wherein, the first outer peripheral surface is closer to the side of the object than the at least three injection marks, and the first outer peripheral surface gradually shrinks toward the side of the object; Wherein, the angle between the first outer peripheral surface and the optical axis is α, the distance from the at least three injection marks to the object side of the plastic lens barrel in a direction parallel to the optical axis is Lg, and the distance from the image side to the object side of the plastic lens barrel in a direction parallel to the optical axis is Lb, which satisfies the following conditions: 15 degrees ≤ α ≤ 55 degrees; and 0.33 < Lg / Lb < 0.

85.

11. The imaging lens as described in claim 10, characterized in that, The number of at least one parallel inner edge face is at least six.

12. The imaging lens as described in claim 11, characterized in that, The number of the plurality of imaging lens elements is at least six.

13. The imaging lens as described in claim 10, characterized in that, The outer periphery has at least three planes, and the at least three injection marks are respectively disposed on the at least three planes.

14. The imaging lens as described in claim 10, characterized in that, The distance from the at least three injection marks to the object side of the plastic lens barrel in a direction parallel to the optical axis is Lg, and the distance from the image side to the object side of the plastic lens barrel in a direction parallel to the optical axis is Lb, satisfying the following condition: 0.5 ≤ Lg / Lb ≤ 0.

75.

15. The imaging lens as described in claim 10, characterized in that, The plastic lens barrel is made of black plastic material and is manufactured by injection molding, and the diameter of at least one parallel inner edge surface of the inner circumference of the plastic lens barrel is greater than π. 2 Millimeters.

16. The imaging lens as described in claim 10, characterized in that, The shrinkage rate of the plastic lens barrel and one of the plurality of imaging lens elements is less than 0.7%.

Images