Lenses, camera modules and terminals

Abstract

To provide a lens assembly, a camera module and a terminal in a lens technical field.SOLUTION: A lens assembly includes a lens barrel, a plurality of lenses, a lock ring, a spacer ring, and a washer ring, where a light passage hole is opened in the lens barrel, and a receiving part is provided in the light passage hole. The plurality of lenses are provided in the light passage hole; the one lens and / or adjacent two lenses are brought into contact with the receiving part; and the lock ring is provided in the light passage hole and is screwed with the lens barrel. The spacer ring is provided in the light passage hole and is provided between the two adjacent lenses. The spacer ring is provided in the light passage hole so as to be elastically compressible. The washer ring is provided between the two adjacent lenses, and / or between the spacer ring and the lens provided so as to be adjacent to the spacer ring, and / or between the lock ring and the lens provided so as to be adjacent to the lock ring. By providing the washer ring, safety and reliability are improved.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application relates to the field of lens technology, and more particularly to a lens, a camera module, and a terminal. [Background technology]

[0002] When assembling a lens, factors such as the machining accuracy, tolerances, and hard contact between the lens barrel thread and / or the lock ring can cause the lock ring to tilt significantly, resulting in uneven contact between the lock ring and the adjacent lens element, or pushing and tilting the lens. This can also cause deformation of the lens surface, reducing the reliability of the lens and potentially adversely affecting its photographic performance. Summary of the Invention [Problem to be solved by the invention]

[0003] In order to solve the above problem, the present invention provides a lens, a camera module, and a terminal that can improve the reliability of the lens. [Means for solving the problem]

[0004] An embodiment of the present application provides a lens, a lens barrel having a light passing hole extending in a direction along the optical axis and a receiving portion provided within the light passing hole; a plurality of lenses provided in the light passing hole, one of the lenses abutting on one side of the receiving portion and / or two adjacent lenses abutting on opposite sides of the receiving portion; a lock ring provided in the light passing hole and screwed onto the lens barrel; a spacer ring provided in the light passing hole and between two adjacent lenses; a washer provided in the light passing hole and elastically compressible in the optical axis direction; A lens assembly, characterized in that the washer is provided between two adjacent lenses, and / or the washer is provided between the spacer ring and the lens provided adjacent to the spacer ring, and / or the washer is provided between the lock ring and the lens provided adjacent to the lock ring.

[0005] In the above-mentioned lens assembly, multiple lenses, spacer rings, and washers are assembled into the light passage hole of the lens barrel and then secured in place with a lock ring. A spacer ring is placed between two adjacent lenses, and / or a washer is placed between the spacer ring and the lens adjacent to the spacer ring, and / or a washer is placed between the lock ring and the lens adjacent to the lock ring. The washer is compressed and deformed by the locking force of the lock ring. The washer absorbs most of the locking force through its own deformation, increasing the friction between the washer, lock ring, and lens. This is advantageous for securing the lens and improves safety and reliability. Furthermore, the washer's own deformation solves the problem of cantilever force being applied to the lens when the lock ring tilts, which can cause loosening. When the washer deforms, a preload is generated, and the washer presses down on the lens with preload when the lens is switched between high and low temperatures, eliminating the problem of lens loosening at high and low temperatures and improving the reliability of the lens assembly. The washer can also provide a preload force that prevents the lens from shifting position and becoming decentered with temperature changes.

[0006] In one embodiment, the compression ratio of the washer in the direction along the optical axis is in the range of 20% to 50% and / or the thickness of the washer in the direction along the optical axis is in the range of 0.3 mm to 1 mm.

[0007] In the above lens assembly, by specifying the compression ratio of the washer, 1. the washer can provide a stable fixing effect to the lens through its own deformation, and 2. the washer can be prevented from being excessively compressed and becoming permanently deformed. In the above lens assembly, by specifying the thickness range of the washer, 1. it can be prevented from becoming too thick, which would be disadvantageous for assembling the lens assembly, and 2. it is advantageous for processing the washer.

[0008] In one embodiment, the outer diameter of the washer in the direction perpendicular to the optical axis is in the range of 3 mm to 30 mm.

[0009] In the above-mentioned lens assembly, by specifying the outer diameter range of the washer, 1. the washer can be brought into complete contact with the periphery of the lens, and the washer can also function as a spacer, and 2. it is advantageous for processing the washer.

[0010] In one embodiment, the width range of the washer in the direction perpendicular to the optical axis is 0.5 mm to 1 mm.

[0011] In the above lens assembly, by specifying the width range of the washer, 1. it is possible to prevent the pressure caused by the washer being compressed from exceeding the receiving range of the lens and causing deformation of the lens, and 2. it is advantageous for processing the washer.

[0012] In one embodiment, the washer has a notch, and the angle of the notch ranges from 5° to 45°.

[0013] In the lens assembly described above, the provision of a notch in the washer effectively solves the problem of large tolerances in the outer diameter of the washer. When the outer diameter of the washer is large, the outer diameter can be pressed toward the notch, which is advantageous for miniaturizing the lens design and optimizing the lens structure. Specifying the angle range of the notch is advantageous for applying a uniform force around the entire circumference of the washer.

[0014] In one embodiment, the shape of a cross section of the washer taken along the optical axis and passing through the geometric center is any one of a circle, an ellipse, a rectangle, a hexagon, and an octagon.

[0015] In the above-described lens assembly, by defining the cross-sectional shape of the washer, the washer can be compressed so that both surfaces along its optical axis come into flat contact with the corresponding lens, lock ring, and spacer ring, thereby applying a more uniform force to the lens.

[0016] In one embodiment, the washer has a Shore hardness range of 20-70.

[0017] In the above-mentioned lens assembly, by specifying the Shore hardness range of the washer, 1. the locking force of the lock ring can be reduced by the washer's own deformation, and 2. deformation of the washer when it rotates along with the lock ring can be reduced.

[0018] In one embodiment, the lens assembly further includes a filter on which the locking ring is provided on a side facing away from the lenses or on a side facing the lenses, and the washer is further provided between the filter and the lens adjacent to the filter.

[0019] The lens assembly can be provided with a filter to provide a filtering function. By providing a washer between the filter and the adjacent lens, the lens can also be sealed, preventing impurities such as water and dust from entering the interior of the lens barrel.

[0020] An embodiment of the present application further provides a camera module, the camera module comprising a housing, a photosensitive chip, and a lens assembly according to any of the above embodiments, the photosensitive chip being mounted in the housing, the housing having a mounting hole, the lens assembly being mounted in the mounting hole, and the optical axis of the lens assembly being coaxial with the photosensitive chip.

[0021] In the camera module described above, multiple lenses, spacer rings, and washers are assembled into the light passage hole of the lens barrel and then secured in place with a lock ring. A spacer ring is placed between two adjacent lenses, and / or a washer is placed between the spacer ring and the lens adjacent to the spacer ring, and / or a washer is placed between the lock ring and the lens adjacent to the lock ring. The washer is compressed and deformed by the locking force of the lock ring. The washer absorbs most of the locking force through its own deformation, increasing the friction between the washer, lock ring, and lens. This is advantageous for securing the lens and improves safety and reliability. Furthermore, the washer's own deformation solves the problem of the force applied to one side of the lens becoming loose when the lock ring tilts. When the washer deforms, a preload is generated, and the washer presses down on the lens with preload when the lens is switched between high and low temperatures, eliminating the problem of lens loosening due to high and low temperatures and improving the reliability of the camera module. The washer can also provide a preload force that prevents the lens from shifting position and becoming decentered with temperature changes.

[0022] An embodiment of the present application further provides a terminal including any of the camera modules described above.

[0023] In the above-mentioned terminal, multiple lenses, spacer rings, and washers are assembled into the light passage hole of the lens barrel and then fixed and locked with a lock ring. A spacer ring is placed between any two adjacent lenses among the multiple lenses, and / or a washer is placed between the spacer ring and any lens adjacent to the spacer ring, and / or a washer is placed between the lock ring and the lens adjacent to the lock ring. The washer is compressed and deformed by the locking force of the lock ring. The washer absorbs most of the locking force through its own deformation, increasing the friction between the washer, lock ring, and lens. This is advantageous for fixing the lens and improves safety and reliability. Furthermore, the washer's own deformation solves the problem of the force applied to one side of the lens becoming loose when the lock ring tilts. When the washer deforms, a preload is generated, and the washer presses down on the lens with preload when the lens is switched between high and low temperatures, eliminating the problem of lens loosening at high and low temperatures and improving the reliability of the terminal. The washer can also provide a preload force that prevents the lens from shifting position and becoming decentered with temperature changes. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic cross-sectional view of a lens assembly according to a first embodiment of the present invention, taken along the optical axis thereof. [Figure 2] FIG. 2 is a schematic plan view of a washer in the lens assembly shown in FIG. [Figure 3] FIG. 3 is a schematic side view of a washer in the lens assembly shown in FIG. [Figure 4] FIG. 4 is a data table of compression ratio ranges for washers in the lens assembly shown in FIG. [Figure 5]FIG. 5 is a schematic cross-sectional view of a lens assembly according to Example 2 of the present application, taken along the optical axis. [Figure 6] FIG. 6 is a data table of compression ratio ranges for washers in the lens assembly shown in FIG. [Figure 7] FIG. 7 is a cross-sectional schematic view of a lens assembly according to a third embodiment of the present invention, taken along the optical axis thereof. [Figure 8] FIG. 8 is a schematic plan view of a washer in the lens assembly shown in FIG. [Figure 9] FIG. 9 is a schematic cross-sectional view of a lens assembly according to Example 4 of the present application, taken along the optical axis. [Figure 10] FIG. 10 is a cross-sectional schematic view of a lens assembly provided by Example 5 of the present application along the optical axis. [Figure 11] FIG. 11 is a cross-sectional schematic view of a lens assembly provided by Example 6 of the present application, taken along the optical axis. [Figure 12] FIG. 12 is a cross-sectional schematic view of a lens assembly provided by Example 7 of the present application, taken along the optical axis. [Figure 13] FIG. 13 is a cross-sectional schematic view of a lens assembly provided by Example 8 of the present application, taken along the optical axis. [Figure 14] FIG. 14 is a cross-sectional schematic view of a lens assembly provided by Example 9 of the present application, taken along the optical axis. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of the present disclosure will be described in detail. In the illustrated drawings of the above embodiment, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiment described below with reference to the drawings is an example and does not limit the present application.

[0026] Hereinafter, several embodiments of the present application will be described in detail with reference to the above drawings. Where no conflict exists, the following examples and features in the examples can be combined with each other.

[0027] 1, Example 1 of the present application provides a lens assembly 1. Lens assembly 1 includes a lens barrel 10, a plurality of lenses 20, a lock ring 30, a spacer ring 40, and a washer 50. Note that lens assembly 1 has an object side and an image side, where the object side is the side facing the imaging object and the image side is the side facing away from the imaging object. Lens barrel 10 has a light passage hole 12 that extends in the direction of optical axis 200, and a receiving portion 14 is provided inside lens barrel 10 so as to protrude toward light passage hole 12, with receiving portion 14 protruding from the inner wall of lens barrel 10 in a direction perpendicular to optical axis 200. In this embodiment, receiving portion 14 is located on the object side of light passage hole 12, and receiving portion 24 abuts and receives lens 20. A female thread is provided on the inner wall of lens barrel 10 near the image side. The multiple lenses 20 are all provided within the light passing hole 12. Of the multiple lenses 20, two or more adjacent lenses 20 may be connected, two or more lenses 20 may be spaced apart, or multiple connected lenses 20 may be spaced apart from each other, one lens 20 may abut one side of the receiving portion 14, and / or two adjacent lenses 20 may abut opposite sides of the receiving portion 14. In this embodiment, there are six lenses 20, and four lenses 20 from the image side to the object side (from top to bottom) are spaced apart from each other, and the remaining two lenses 20 are connected so that the last lens 20 abuts the image side of the receiving portion 14. For ease of understanding, in this embodiment, two or more connected lenses 20 are defined as a lens set.

[0028] The lock ring 30 is provided in the light passing hole 12 and is screwed onto the lens barrel 10. In this embodiment, a male thread is provided on the outside of the lock ring 30, and the male thread of the lock ring 30 and the female thread of the lens barrel 10 mesh with each other, thereby achieving screwing of the lock ring 30 and the lens barrel 10.

[0029] The spacer ring 40 is disposed within the light-transmitting hole 12 and between two adjacent lenses 20. The lenses 20 can be divided into multiple pairs of adjacent lenses 20, and one, two, or more pairs of adjacent lenses 20 can be provided with a spacer ring 40. In this embodiment, there are four spacer rings 40, and each spacer ring 40 is disposed between two adjacent lenses 20 or between an adjacent lens 20 and a lens pair. The thickness of the spacer ring 40 along the optical axis 200 can be determined according to actual needs, and this embodiment is not limited thereto. In another embodiment, the number of spacer rings 40 can be determined according to actual design needs, and the specific number and positions of the spacer rings 40 are not limited thereto.

[0030] The washer 50 is disposed within the light transmitting hole 12 and is elastically compressible in a direction along the optical axis 200. That is, the washer 50 can be compressed to generate a preload and can elastically return to its original position after the preload is removed. The washer 50 is disposed between two adjacent lenses 20 or between a lens 20 and a lens pair, and / or between the spacer ring 40 and a lens 20 or a lens pair adjacent to the spacer ring 40, and / or between the lock ring 30 and a lens 20 or a lens pair adjacent to the lock ring 30. That is, the washer 50 may be disposed between two adjacent lenses 20, or between the spacer ring 40 and a lens 20 adjacent to the spacer ring 40. The washer 50 may also be disposed between the lock ring 30 and a lens 20 adjacent to the lock ring 30. The washer 50 may be disposed between all of the above positions, or may be disposed at some of the positions. Specifically, the spacer ring 50 can be provided according to the actual design, and the present application does not limit the specific installation manner. In this embodiment, the spacer ring 50 is provided between one spacer ring 40 and the lens 20 that abuts on the image side of the spacer ring 40. Specifically, in this embodiment, an insertion groove 42 is opened on the image side of the spacer ring 40, and the insertion groove 42 is oriented in the direction along the optical axis 200. Depth is smaller than the thickness of the washer 50 in the direction along the optical axis 200. The washer 50 is positioned in the fitting groove 42 and is elastically compressed by the contact of the lens 20. By providing the washer 50 in the fitting groove 42, it is possible to improve the space utilization rate.

[0031] The lens assembly 1 described above comprises multiple lenses 20, multiple spacer rings 40, and washer rings 50 assembled in the light passage hole 12 of the lens barrel 10. The multiple lenses 20, multiple spacer rings 40, and washer ring 50 are locked together by threading the lock ring 30 onto the image side of the lens barrel 10. However, the image side of the washer 50 is higher than the image side of the spacer ring 40, so the washer 50 is provided between the lens 20 and the spacer ring 40. The washer 50 is indirectly compressed and deformed by the locking force of the lock ring 30. Even after being compressed, it can contact and support the spacer ring 40 and the lens 20. This means that the processing accuracy and tolerance of the washer 50 do not affect the parallelism of the assembled lens assembly 1. The washer 50's own deformation absorbs much of the locking force, increasing the friction between the washer 50, the spacer ring 40, and the lens 20. Furthermore, the frictional forces between the lock ring 30 and the lens 20, between the lens 20 and the spacer ring 40, and between the lens assembly and the receiving portion 14 can be increased. This improves the fixation of the lens 20, spacer ring 40, and washer 50, ensuring that the lens 20 is securely fixed even when subjected to a strong impact, thereby improving the safety and reliability of the lens assembly 1. Furthermore, the washer 50 generates preload when it deforms, causing the lock ring 30 to tilt, resulting in a cantilever force being applied to the lens 20 and making it prone to loosening. When the washer 50 deforms, preload is generated, and when the lens assembly 1 switches between high and low temperatures, the washer 50 presses down on the lens 20 with the preload, thereby solving the problem of the lens assembly 1 being prone to loosening at high and low temperatures and improving the reliability of the lens assembly 1. Furthermore, by contacting the spacer ring 50 at a position less susceptible to the influence of the lens 20, the problem of temperature drift due to high and low temperatures in the glass and plastic composite structure of the lens assembly 1 can be solved.By placing the washer 50 approximately midway between the lenses 20, the preload generated when the washer 50 is compressed can be transmitted uniformly to the lenses 20 on both sides, preventing the lenses 20 from rattling. The washer 50 can also apply preload, preventing decentering of the lenses 20 caused by the position of the lenses 20 continually changing with temperature changes.

[0032] (Comparative Example 1) The lens assembly (not shown) of Comparative Example 1 has a configuration similar to that of the lens assembly 1 of Example 1, except that the lens assembly of Comparative Example 1 does not include a washer 50. After assembling multiple lenses 20 and multiple spacer rings 40 into the light-transmitting hole 12 of the lens barrel 10, the multiple lenses 20 and multiple spacer rings 40 are locked into the lens barrel 10 by screwing them into the lens barrel 10 with a lock ring 30. Because the washer 50 is not included, the lock ring 30 tilts due to machining tolerances, resulting in contact between the lock ring 30 and adjacent lenses 20 on only one side, pushing and tilting the lenses 20. In an actual drop test, some of the lenses 20 had their surface shapes crushed, and the lens reliability did not meet the drop requirements. In an actual high-temperature and low-temperature switching test, the multiple lenses 20 were decentered due to rattle between them, and the lens reliability did not meet the high-temperature and low-temperature switching requirements.

[0033] 2 and 3 , in this embodiment, a notch 52 is formed in the washer 50 (the washer 50 is approximately C-shaped), and the angle A of the notch 52 ranges from approximately 5° to 45°, for example, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, etc. By forming the notch 52 in the washer 50, the problem of a large outer diameter tolerance of the washer 50 can be effectively solved. If the outer diameter of the washer 50 increases during the manufacturing process, when the lock ring 30 comes into contact with the washer 50 during assembly of the lens assembly 1, the washer 50 will be pressed and deformed. However, because the washer 50 has the notch 52, the lock ring 30 can compress the washer 50 toward the notch 52 by pressing it. The object-side and image-side surfaces of the assembled washer 50 are both flat, and the washer 50, due to its large outer diameter, does not twist, creating a gap that cannot be eliminated in the direction of the optical axis 200. This allows the washer 50 to be assembled flat into the lens assembly 1 and does not affect various optical parameters of the lens assembly 1, such as the focal length. This is also advantageous for optimizing the configuration of the lens assembly 1 and increasing the range of use of the washer 50. Specifying the angle range of the notch 52 is advantageous for uniformly applying the biasing force of the washer 50. However, if the angle A of the notch 52 is less than 5°, the angle of the notch 52 is small, making it difficult to machine the notch 52. This is because forming the notch 52 in the washer 50 is disadvantageous, as it reduces the washer 50's adaptability to deformation when pressed, and may cause a gap when twisted under force, which may make it impossible to effectively solve the problem of the large outer diameter tolerance of the washer 50. If the angle A of the notch 52 is greater than 45°, the angle of the notch 52 is large, and after the lens assembly 1 is assembled, the angle of the washer 50 may be large after it is pressed and the notch 52 contracts. As a result, the washer 50 cannot apply a uniform elastic force to the lens 20, which makes the lens 20 prone to tilting, affecting the reliability of the lens assembly 1.

[0034] Table 1 shows the range of angles of the notch 52 of the washer 50 and the corresponding implementation effects.

[0035] [Table 1]

[0036] (Comparative Example 2) The lens of Comparative Example 2 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, except that in Comparative Example 2, the angle of the notch 52 in the washer 50 is set to 2°, and because the angle of the notch 52 is relatively small, the processing of the washer 50 fails.

[0037] (Comparative Example 3) The lens of Comparative Example 3 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, except that the angle of the notch 52 of the washer 500 is 50°. After assembling the lenses 20, the spacer rings 40, and the washer 50 into the light-transmitting hole 12 of the lens barrel 10, the lens barrel 10 is threadedly engaged with the lock ring 30 to lock the lenses 20, the spacer rings 40, and the washer 50. Because the angle of the notch 52 of the washer 50 is 50°, the angle at which the washer 50 is compressed is still large (in multiple actual tests, the angle at which the notch 52 is compressed ranges from 45° to 48°). As a result, some areas of the washer 50 are unable to apply elastic force to the lens 20. In actual high-temperature and low-temperature switching tests, the lens 20 abutting the image side of the washer 50 may tilt. Therefore, the reliability of the lens cannot meet the high and low temperature switching requirements.

[0038] Comparative Example 4 The lens of Comparative Example 4 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, except that the angle of the notch 52 of the washer 500 is 60°. After assembling the lenses 20, the spacer rings 40, and the washer 50 into the light passage hole 12 of the lens barrel 10, the lenses 20, the spacer rings 40, and the washer 50 are locked by screwing the lens barrel 10 with the lock ring 30. Because the angle of the notch 52 of the washer 50 is 60°, the angle at which the washer 50 is compressed and the notch 52 contracts is still large (in multiple actual tests, the angle at which the notch 52 contracted was between 46° and 54°). As a result, some areas of the washer 50 are unable to apply elastic force to the lens 20. In an actual high-temperature and low-temperature switching test, the lens 20 abutting the image side of the washer 50 and the lens 20 close to the object side of the washer 50 may be tilted. Therefore, the reliability of the lens cannot meet the high-temperature and low-temperature switching requirements.

[0039] As can be appreciated, in an alternative embodiment, the washer 50 may be annular, i.e., the washer 50 may not have the notch 52 drilled therein.

[0040] In this embodiment, the material of the washer 50 may be an elastic material such as rubber, silica gel, gel water, latex, polyurethane elastomer, etc.

[0041] In this embodiment, the outer diameter B of the washer 50 in a direction perpendicular to the optical axis 200 ranges from approximately 3 mm to 30 mm, for example, 3 mm, 4 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, etc. As such, the washer 50 is basically applicable to most commercially available lenses and has excellent fit. By specifying the range of the outer diameter B of the washer 50, on the one hand, the washer 50 can be brought into complete contact with the periphery of the lens 20 to impart a uniform elastic force to the lens 20, and on the other hand, it is advantageous for processing the washer 50. However, if the outer diameter B of the washer 50 is less than 3 mm, the outer diameter of the washer 50 becomes too small and exceeds the lower limit of processing, which is disadvantageous for processing the washer 50. If the outer diameter B of the washer 50 is greater than 30 mm, the outer diameter of the washer 50 will be too large, and when applied to most commercially available lenses, the periphery of the washer 50 will be easily bent and deformed under force, resulting in an irresolvable gap in the direction of the optical axis 200. This will affect the parallelism and reliability of the lens assembly 1, and the larger outer diameter of the washer 50 will increase the diameter of the lens assembly 1, which is disadvantageous for achieving a compact design for the lens assembly 1.

[0042] Table 2 shows the range of outer diameters of the washer 50 in the direction perpendicular to the optical axis 200 and the corresponding implementation effects.

[0043] [Table 2]

[0044] (Comparative Example 5) The lens (not shown) of Comparative Example 5 has a configuration similar to that of the lens assembly 1 of Example 1, except that the outer diameter B of the washer 50 in Comparative Example 5 in the direction perpendicular to the optical axis 200 is 2 mm. Because the outer diameter of the washer 50 is small, it exceeds the lower limit of processing, which can result in processing failure. Even if processing is successful, the outer diameter of the washer 50 after processing is small, and the diameter of the hole after drilling is smaller than the photosensitive area of ​​the photosensitive chip or the effective light transmission area of ​​the lens 20, which can result in poor imaging or the washer 50 breaking after drilling and becoming unusable.

[0045] (Comparative Example 6) The lens (not shown) of Comparative Example 6 has a configuration similar to that of the lens assembly 1 of Example 1, except that the outer diameter B of the washer 50 in Comparative Example 6 in the direction perpendicular to the optical axis 200 is 40 mm. After multiple lenses 20, multiple spacer rings 40, and washer 50 are assembled into the light passing hole 12 of the lens barrel 10, the multiple lenses 20, multiple spacer rings 40, and washer 50 are locked by screwing the lens barrel 10 with the lock ring 30. Because the outer diameter of the washer 50 reaches 40 mm, force is applied to the periphery of the washer 50, causing it to bend and deform, resulting in an irresolvable gap (formed by the bent periphery of the washer 50) between the washer 50 and the lock ring 30 and / or between the washer 50 and an adjacent lens 20 in the direction of the optical axis 200. This increases the elastic force that the washer 50 exerts on the lens 20, and in an actual high-temperature / low-temperature switching test, the lens 20 abutting the image side of the washer 50 may be pressed and damaged, and the reliability of the lens may not meet the high-temperature / low-temperature switching requirements.

[0046] In this embodiment, the width C of the washer 50 in the direction perpendicular to the optical axis 200 ranges from approximately 0.5 mm to 1 mm, e.g., 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc. Specifying the range of the width C of the washer 50 in this manner: 1. It is possible to prevent the pressure generated by the compression of the washer 50 from exceeding the lens receiving area and causing deformation of the lens, and 2. It is advantageous for processing the washer. However, if the width C of the washer 50 is less than 0.5 mm, the width of the washer 50 exceeds the lower processing limit, which is disadvantageous for processing the washer 50. If the width C of the washer 50 is greater than 1 mm, the pressure generated by the washer 50 being pressed is too great and is likely to exceed the lens receiving area. Furthermore, the large width of the washer 50 is likely to obstruct the effective light transmission area of ​​the lens 20, affecting the imaging performance of the lens assembly 1.

[0047] Table 3 shows the range of widths of the washer 50 in the direction perpendicular to the optical axis 200 and the corresponding implementation effects.

[0048] [Table 3]

[0049] (Comparative Example 7) The lens (not shown) of Comparative Example 7 has a configuration similar to that of the lens assembly 1 of Example 1, except that the width of the washer 50 in Comparative Example 7 in the direction perpendicular to the optical axis 200 is 0.3 mm. Because the width of the washer 50 is small, it exceeds the lower processing limit, resulting in processing failure. Alternatively, even if processing is successful, during actual assembly, the narrow width of the washer 50 causes the lock ring 30 to twist the washer 50, causing the washer 50 to break, preventing the washer 50 from applying a stable and effective preload and preventing normal use.

[0050] (Comparative Example 8) The lens of Comparative Example 8 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, except that the width C of the washer 50 in Comparative Example 8 in the direction perpendicular to the optical axis 200 is 2 mm. After assembling the lenses 20, the spacer rings 40, and the washer 50 into the light passage hole 12 of the lens barrel 10, the lenses 20, the spacer rings 40, and the washer 50 are locked by screwing the lock ring 30 into the lens barrel 10. Because the width of the washer 50 reaches 2 mm, the washer 50 blocks the effective light transmission area of ​​the lens 20. In actual photography tests, the amount of light entering the lens is reduced, and the edges of images taken using the lens are blurred, meaning that the reliability of the lens does not meet photography requirements.

[0051] In this embodiment, the thickness T of the washer 50 in the direction along the optical axis 200 ranges from approximately 0.3 mm to 1 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 μm, 1 μm, etc. By limiting the range of the thickness T of the washer 50 in this way, 1. the washer 50 is prevented from becoming too thick, which would be disadvantageous in assembling the lens 1, the washer 50 is more likely to generate elastic force when pressed and deformed, and this elastic force is applied to the lens 20, etc., and 2. the washer 50 is easier to process. However, if the thickness T of the washer 50 is less than 0.3 mm, the thickness of the washer 50 exceeds the lower limit of processing, which would be disadvantageous in processing the washer 50. If the thickness T of the washer 50 is greater than 1 mm, the washer 50 will be thick, making it difficult for the washer 50 to deform under pressure, which will affect the assembly of the lens 1 and make it more likely to be damaged by being subjected to force when it presses against other objects such as the lens 20 during assembly, affecting the reliability of the lens assembly 1 and lengthening the lens barrel 10, which is detrimental to miniaturizing the lens assembly 1.

[0052] Table 4 shows a range of thicknesses along the optical axis 200 of the washer 50 and their corresponding performance effects.

[0053] [Table 4]

[0054] (Comparative Example 9) The lens (not shown) of Comparative Example 9 has a configuration similar to that of the lens assembly 1 of Example 1, except that in Comparative Example 9, the thickness T of the washer 50 along the optical axis 200 is 0.2 mm. Because the thickness of the washer 50 is small, it exceeds the lower processing limit, resulting in processing failure. Alternatively, even if processing is successful, during actual assembly, because the thickness of the washer 50 is too narrow, the washer 50 is twisted by the lock ring 30, causing the washer 50 to break. This prevents the washer 50 from applying a stable and effective preload, making it impossible to use normally.

[0055] (Comparative Example 10) The lens (not shown) of Comparative Example 10 has a configuration similar to that of the lens assembly 1 of Example 1, except that the thickness T of the washer 50 in Comparative Example 10 in the direction along the optical axis 200 is 1.5 mm. After assembling multiple lenses 20, multiple spacer rings 40, and washer 50 into the light passage hole 12 of the lens barrel 10, the multiple lenses 20, multiple spacer rings 40, and washer 50 are screwed into the lens barrel 10 with the lock ring 30 to lock the multiple lenses 20, multiple spacer rings 40, and washer 50. Because the thickness of the washer 50 reaches 1.5 mm, the thickness of the washer 50 remains thick even after it is pressed and compressed (in multiple actual tests, the thickness of the washer 50 after compression was between 1 mm and 1.2 mm). As a result, the washer 50 occupies a portion of the thickness along the optical axis 200 at the light passage hole 12, preventing the lock ring 30 from being fully attached to the image side of the lens barrel 10 and resulting in a failure in assembling the lens assembly.

[0056] In this embodiment, the compression ratio of the washer 50 in the direction of the optical axis 200 ranges from 20% to 50% of the thickness T of the washer 50 in the direction of the optical axis 200, for example, 20%, 30%, 40%, 50%, etc. By limiting the compression ratio of the washer 50 in this way, 1. the washer 50 can generate a uniform elastic force through its own deformation, providing a stable fixing effect for the lens 20, and 2. the washer 50 can be prevented from being excessively compressed and permanently deformed, or from being unable to compress and deform under force, resulting in an inability to generate elastic force. However, if the compression ratio of the washer 50 is less than 20%, the preload applied by the washer 50 is small, preventing a stable fixing effect for the lens 20. Furthermore, the washer 50 is difficult to compress, and the washer 50 is hard. Therefore, the washer 50 is difficult to compress and deform during assembly of the lock ring 30, which may result in damage to the lens 20 or other objects by pressing against them. If the compression ratio of the washer 50 is greater than 50%, the washer 50 will be permanently deformed when pressed, and the washer 50 will lose its elastic force due to compression, and will no longer be able to provide a stable fixing effect for the lens 20, which will affect the reliability of the lens assembly 1.

[0057] Table 5 shows the range of compression ratios along the optical axis 200 of the washer 50 and their corresponding implementation effects.

[0058] [Table 5]

[0059] (Comparative Example 11) The lens of Comparative Example 11 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, except that the compression ratio of the washer 50 in the direction along the optical axis 200 is within 5% of the thickness T of the washer 50 in the direction along the optical axis 200. After assembling the lenses 20, the spacer rings 40, and the washer 50 into the light-transmitting hole 12 of the lens barrel 10, the lenses 20, the spacer rings 40, and the washer 50 are locked by screwing them into the lens barrel 10 with the lock ring 30. Because the compression ratio of the washer 50 is 5%, the preload caused by the compression of the washer 50 is small. In an actual high-temperature and low-temperature switching test, decentering of the lenses 20 occurs due to play between the three lenses 20 located on the object side of the washer 50, and the reliability of the lens does not meet the high-temperature and low-temperature switching requirements.

[0060] (Comparative Example 12) The lens (not shown) of Comparative Example 12 has a configuration similar to that of the lens assembly 1 of Example 1, except that the compression ratio range of the washer 50 in the direction along the optical axis 200 is 60% of the thickness T of the washer 50 in the direction along the optical axis 200. After assembling multiple lenses 20, multiple spacer rings 40, and washer 50 into the light-transmitting hole 12 of the lens barrel 10, the multiple lenses 20, multiple spacer rings 40, and washer 50 are locked into the lens barrel 10 by screwing them into the lens barrel 10 with the lock ring 30. Because the compression ratio of the washer 50 is 60%, the washer 50 permanently deforms after being compressed, making it impossible to apply preload to the lens 20. In an actual high-temperature and low-temperature switching test, decentering of the lens 20 occurs due to rattle between the multiple lenses 20, and the lens reliability does not meet the high-temperature and low-temperature switching requirements.

[0061] In this embodiment, the Shore hardness range of the washer 50 is 20 to 70, for example, 20, 30, 40, 50, 60, 70, etc. By specifying the Shore hardness range of the washer 50 in this way, 1. the locking force of the locking ring 30 can be reduced by the washer 50's own deformation, making the washer 50 more likely to be compressed and preventing it from colliding with the locking ring 30 when the locking ring 30 applies the locking force, and 2. deformation of the washer 50 when it rotates with the locking ring 30 can be reduced. However, if the Shore hardness of the washer 50 is less than 20, the washer 50 becomes soft and is more likely to twist and deform as the locking ring 30 rotates. As a result, the washer 50 cannot reduce the locking force of the locking ring 30, and the locking ring 30 may apply the locking force to other objects such as the lens 20, affecting the reliability of the lens assembly 1. If the Shore hardness of washer 50 is greater than 70, washer 50 will be hard and will be less likely to be deformed when pressed. In addition, washer 50 will be more likely to collide with lock ring 30, preventing lock ring 30 from being completely attached to lens barrel 10. Alternatively, washer 50 will receive the locking force of lock ring 30 and apply a hard contact force to lens 20, damaging lens 20 and affecting the reliability of lens assembly 1.

[0062] Table 6 shows the Shore hardness ranges for the washer 50 and their corresponding performance effects.

[0063] [Table 6]

[0064] (Comparative Example 13) The lens of Comparative Example 13 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, except that the Shore hardness of the washer 500 in Comparative Example 13 is 10. After assembling the multiple lenses 20, the multiple spacer rings 40, and the washer 50 into the light passage hole 12 of the lens barrel 10, the multiple lenses 20, the multiple spacer rings 40, and the washer 50 are locked by screwing them into the lens barrel 10 with the lock ring 30. Because the washer 50 has a Shore hardness of 10, when the lock ring 30 is assembled, the washer 50 is soft and rotates and deforms together with the lock ring 30. This prevents the washer 50 from applying a stable preload to the lens 20, and in an actual high-temperature and low-temperature switching test, rattle occurs between the multiple lenses 20, which can cause decentering of the lens 20. As a result, the reliability of the lens does not meet the high-temperature and low-temperature switching requirements.

[0065] (Comparative Example 14) The lens of Comparative Example 14 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, except that the Shore hardness of the washer 50 of Comparative Example 14 is 80. After assembling multiple lenses 20, multiple spacer rings 40, and washer 50 into the light passage hole 12 of the lens barrel 10, the multiple lenses 20, multiple spacer rings 40, and washer 50 are locked by screwing them into the lens barrel 10 with the lock ring 30. Because the Shore hardness of the washer 50 has reached 80, the washer 50 is difficult to compress and deform when assembling the lock ring 30, and the lock ring 30 cannot be fully attached to the image side of the lens barrel 10, resulting in a failure in assembling the lens assembly.

[0066] In this embodiment, the cross-sectional shape of the washer 50 in a direction parallel to the optical axis 200 is circular. By specifying the cross-sectional shape of the washer 50 in this way, the washer 50 is compressed so that both surfaces in the direction along the optical axis can come into flat contact with the corresponding lens 20, lock ring 30, and spacer ring 40, thereby applying a more uniform force to the lens 20. In another embodiment, the cross-section of the washer 50 passing through its geometric center in the direction of the optical axis 200 may be an ellipse, parallelogram, square, trapezoid, hexagon, octagon, or other shape.

[0067] Referring also to FIG. 4 , the compression ratio-force may be understood as the compression force corresponding to the compression ratio. As can be seen from the relationship between hardness, cross-sectional diameter, outer diameter, compression ratio, and compression force of washer 50 shown in FIG. 4 , washer 50 generates appropriate compression force under different conditions, minimizing changes in lens 20 during impact and high-temperature switching, thereby improving the safety and reliability of lens assembly 1.

[0068] 1 , in this embodiment, the lens assembly 1 further includes a filter 60 provided on the side of the lock ring 30 that is away from the plurality of lenses 20. In this way, by providing the above-described filter 60, the lens assembly 1 has a filtering effect, and the imaging performance of the lens assembly 1 is improved.

[0069] Referring to FIG. 5 , Example 2 of the present invention provides a lens assembly 2. The lens assembly 2 according to Example 2 has a configuration similar to that of Example 1, except that the lens assembly 2 according to Example 2 includes four lenses 20, with the two middle lenses 20 connected to form a lens group. This lens group is spaced apart from the two lenses 20 on either side of it, and there is only one spacer ring 40 located between the lens group and the corresponding lens 20. The lens group abuts against the receiving portion 14, the lens 20 located on the object side abuts against the object side of the receiving portion 14, and there are two lock rings 30. The two lock rings 30 are threadedly engaged with both ends of the lens barrel 10, and a filter 60 is located on the image side of the lock ring 30 located on the image side. A washer 50 is located between the lock ring 30 located on the image side and the adjacent lens 20. By providing the washer 50 between the locking ring 30 and the lens 20, when the locking ring 30 applies a locking force, the washer 50 deforms under the locking force. The washer 50 absorbs most of the locking force through its own deformation, preventing hard contact between the lens 20 and the locking ring 30. This reduces distortion of the lens 20 and solves the problem of the lens 20 being susceptible to cantilever force when the locking ring 30 is tilted. Furthermore, the locking force of the locking ring 30 increases the friction between the washer 50 and the lens 20, which better secures the lens 20 and improves safety when the lens 20 is subjected to mechanical shock. The washer 50 provided between the locking ring 30 and the lens 20 also serves to seal the lens assembly 2, preventing impurities such as water and dust from entering the light passage hole 12. By providing the washer 50 between the lock ring 30 and the lens 20, the washer 50 is not affected by air gap sensitivity, and the imaging performance of the lens assembly 2 is improved.

[0070] In this embodiment, the cross section of washer 50 taken along the direction parallel to optical axis 200 is rectangular. Referring to Figure 6, the relationships between the hardness, width, thickness, outer diameter, compression ratio, and pressing force of washer 50 shown in Figure 6 indicate that washer 50 generates appropriate pressing forces under different conditions, minimizing changes in lens 20 during impact and high-temperature switching, thereby improving the safety and reliability of lens assembly 2.

[0071] Referring to FIG. 7 , Example 3 of the present application provides a lens assembly 3. The lens 3 of Example 2 has a configuration similar to that of the lens assembly 2 of Example 2, except that in this example, a washer 50 is provided between the object side of the lens group and the image side of the receiving portion 14, and the lens 20 abuts against the receiving portion 14 after assembly. By providing the washer 50 between the receiving portion 14 and the lens 20 in this manner, the locking ring 30 pre-compresses the washer 50 when applying a locking force, increasing the frictional force between the lens 20 and the receiving portion 14 of the lens barrel 10 and advantageously securing the lens 20. However, the more lenses 20 in the lens assembly 3, the greater the securing effect.

[0072] Referring to FIG. 8 , in this embodiment, four bosses 54 are evenly spaced on the inside of the washer 50, and four groove structures (not shown) are formed on the image side of the receiving portion 14 of the lens barrel 10, corresponding to the four bosses 54 one-to-one. When the washer 50 is placed on the receiving portion 14, the four bosses 54 are positioned within the corresponding four groove structures. By arranging the bosses 54 evenly on the inside of the washer 50 in this way, the lock ring 30 can be more closely fitted to the circular structure, further reducing torsional force and preventing deformation of other components such as the lens 20 due to torsion. Furthermore, by arranging the bosses 54 evenly on the inside of the washer 50, the bosses 54 can press against the lens 20, increasing frictional force.

[0073] In other embodiments, fewer or more bosses 54, for example, two or five, may be provided on the inside of the washer 50, and the size and number of the bosses 54 can be designed depending on the magnitude of the torsional force.

[0074] 9 , Example 4 of the present application provides a lens assembly 4. The lens assembly 4 according to Example 4 has a configuration similar to that of the lens assembly 2 of Example 2, except that a washer 50 is provided between the two middle lenses 20. By providing the washer 50 between two adjacent lenses 20 in this manner, the washer 50 itself deforms to increase the frictional force between the two adjacent lenses 20, which is advantageous for fixing the lenses 20, and the washer 50 also functions as a spacer ring 40, allowing the two adjacent lenses 20 to be spaced apart.

[0075] 10 , Example 5 of the present application provides a lens assembly 5. The lens assembly 5 according to Example 5 has a configuration similar to that of the lens assembly 2 according to Example 2, except that in this example, a filter 60 is provided on the object side of the lock ring 30 located on the image side, and a washer 50 is provided between the filter 60 and the lens 20. By providing the washer 50 between the filter 60 and the lens 20 in this manner, the washer 50 increases the frictional force between the filter 60 and the lens 20 through its own deformation, which is advantageous for fixing the lens 20. The washer 50 also serves to seal the lens assembly 5 and prevent impurities such as water and dust from entering the light transmission hole 12.

[0076] 11 , Example 6 of the present application provides a lens assembly 6. The lens assembly 6 of Example 6 has a configuration similar to that of Example 1, except that the lens assembly 6 of Example 6 includes two washers 50, one of which is provided between two adjacent lenses 20 on the object side, and the other washer 50 is provided between the middle lens 20 and its object-side spacer ring 40. By providing two washers 50 in this manner, when the lock ring 30 locks the lenses 20, the spacer rings 40, and the two washers 50, the two washers 50 are pressed together and deformed. The deformation of each of the two washers 50 generates a preload force, which increases the frictional force between the lock ring 30, the lenses 20, and the spacer ring 40, thereby favoring the fixation of the lenses 20 and improving the lens assembly 6's resistance to mechanical impact forces. However, the shapes of the two washers 50 may be the same or different; for example, one washer 50 may be C-shaped and the other washer 50 may be circular; or, for example, one washer 50 may have a circular cross-sectional shape and the other washer 50 may have a rectangular cross-sectional shape.

[0077] 12 , Example 7 of the present application provides a lens assembly 7. The lens assembly 7 of Example 7 has a configuration similar to that of Example 2, except that the lens assembly 7 of Example 7 includes two washers 50. One washer 50 is disposed between the lens 20 and the lock ring 30 located on the image side, and the other washer 50 is disposed between the object side of the lens group and the image side of the receiving portion 14. By providing two washers 50 in this manner, when the lock ring 30 locks the lenses 20, the spacer ring 40, and the two washers 50, the two washers 50 are pressed together and deformed. The deformation of each of the two washers 50 generates a preload force, which increases the frictional force between the lock ring 30, the lens 20, and the spacer ring 40 and the receiving portion 14, which is advantageous for fixing the lens 20 and improves the lens assembly 7's resistance to mechanical impact forces.

[0078] 13 , Example 8 of the present application provides a lens assembly 8. The lens assembly 8 of Example 8 has a configuration substantially similar to that of the lens assembly 1 of Example 1, except that in this example, there are three washers 50, one washer 50 is provided between the lock ring 30 and the lens 20, another washer 50 is provided between one of the intermediate lenses 20 and the spacer ring 40 on the object side thereof, and yet another washer 50 is provided between two adjacent lenses 20 on the object side. In this way, by providing three washers 50, when the lock ring 30 locks the multiple lenses 20, the multiple spacer rings 40, and the multiple washers 50, the three washers 50 are pressed together and deformed, and the three washers 50 generate preload forces due to their respective deformations, increasing the frictional force between the lock ring 30, the lenses 20, and the spacer rings 40 and the receiving portion 14, which is advantageous for fixing the lenses 20 and improves the lens assembly 8's resistance to mechanical impact forces.

[0079] 14 , Example 9 of the present application provides a lens assembly 9. Example lens assembly 9 has a configuration substantially similar to that of lens assembly 2 of Example 2, except that, in this example, a stopper groove 21 is opened on the image-side periphery of the lens 20 located on the image side among the four lenses 20, and a washer 50 is located within stopper groove 21 and abuts between the lock ring 30 and the groove bottom of stopper groove 21. By opening stopper groove 21 on the image-side periphery of the lens 20 closest to the image side in this way, when assembling lock ring 30, stopper groove 21 prevents washer 50 from rotating together with lock ring 30 and shifting toward the center of lens 20, thereby ensuring the assembly yield of lens assembly 9.

[0080] Example 10 of the present application provides a camera module (not shown). The camera module of this example includes the lens assembly described in any one of Examples 1 to 9, and this example will be described using the lens assembly 1 of Example 1 as an example. The camera module of this example includes a housing, a photosensitive chip, and a lens assembly 1. The photosensitive chip is mounted in the housing, a mounting hole is formed in the housing, the lens assembly 1 is mounted in the mounting hole, and the optical axis 200 of the lens assembly 1 is coaxial with the photosensitive chip. The photosensitive chip receives an optical signal that has passed through the lens 1 and converts it into an electrical signal to capture an image.

[0081] In the camera module described above, the lens assembly 1 is formed by assembling multiple lenses 20, multiple spacer rings 40, and washer rings 50 in the light passage hole 12 of the lens barrel 10. The multiple lenses 20, multiple spacer rings 40, and washer ring 50 are locked together by threading the lock ring 30 onto the image side of the lens barrel 10. However, the image side of the washer 50 is higher than the image side of the spacer ring 40, so the washer 50 is provided between the lens 20 and the spacer ring 40. The washer 50 is indirectly compressed and deformed by the locking force of the lock ring 30. Even after being compressed, it can contact and support the spacer ring 40 and the lens 20. This means that the processing accuracy and tolerance of the washer 50 do not affect the parallelism of the assembled lens assembly 1. The washer 50's own deformation absorbs a large amount of the locking force, increasing the frictional force between the washer 50, the spacer ring 40, and the lens 20. Furthermore, the frictional forces between the locking ring 30 and the lens 20, between the lens 20 and the spacer ring 40, and between the lens assembly and the receiving portion 14 can be increased. This improves the fixation of the lens 20, spacer ring 40, and washer 50, ensuring that the lens 20 is securely fixed even when subjected to a strong impact, thereby improving the safety and reliability of the camera module. Furthermore, the washer 50 generates preload when it deforms, causing the locking ring 30 to tilt, resulting in a cantilever force being applied to the lens 20 and making it prone to loosening. When the washer 50 deforms, preload is generated, and when the lens assembly 1 switches between high and low temperatures, the washer 50 presses down on the lens 20 with the preload, thereby solving the problem of the lens assembly 1 being prone to loosening at high and low temperatures and improving the reliability of the lens assembly 1. Furthermore, by contacting the spacer ring 50 at a position less susceptible to the influence of the lens 20, the problem of temperature drift due to high and low temperatures in the glass and plastic composite structure of the lens assembly 1 can be solved.By placing the washer 50 approximately midway between the lenses 20, the preload generated when the washer 50 is compressed can be transmitted uniformly to the lenses 20 on both sides, preventing the lenses 20 from rattling. The washer 50 can also apply preload, preventing decentering of the lenses 20 caused by the position of the lenses 20 continually changing with temperature changes.

[0082] Example 11 of the present application provides a terminal (not shown). The terminal of this example includes the camera module described in Example 10. The terminal of this example may be a car, and the camera module may be a visual sensor. In other examples, the terminal may be other lens-equipped devices such as a dashcam, a security monitor, an AR device, a VR device, a mobile phone, a tablet, or a smartwatch.

[0083] In the above-described terminal, the lens assembly 1 of the camera module is formed by assembling multiple lenses 20, multiple spacer rings 40, and washer rings 50 in the light passage hole 12 of the lens barrel 10. The multiple lenses 20, multiple spacer rings 40, and washer ring 50 are locked together by threading a lock ring 30 onto the image side of the lens barrel 10. However, the image side of the washer 50 is higher than the image side of the spacer ring 40, so the washer 50 is provided between the lens 20 and the spacer ring 40. The washer 50 is indirectly compressed and deformed by the locking force of the lock ring 30. Even after compression, it can contact and support the spacer ring 40 and the lens 20. This prevents the machining accuracy and tolerance of the washer 50 from affecting the parallelism of the assembled lens assembly 1. The washer 50's own deformation absorbs a large amount of the locking force, thereby increasing the frictional force between the washer 50, the spacer ring 40, and the lens 20. Furthermore, the frictional forces between the lock ring 30 and the lens 20, between the lens 20 and the spacer ring 40, and between the lens assembly and the receiving portion 14 can be increased. This allows for better fixation of the lens 20, the spacer ring 40, and the washer 50, ensuring that the lens 20 is securely fixed even when subjected to a strong impact, thereby improving the safety and reliability of the lens assembly 1. Furthermore, the problem of the lens 20 being easily loosened due to a cantilever force applied to the lens 20 when the lock ring 30 tilts due to deformation of the washer 50 itself is solved. Preload is generated when the washer 50 deforms, and when the lens assembly 1 switches between high and low temperatures, the washer 50 presses down on the lens 20 with the preload, solving the problem of the lens assembly 1 being easily loosened at high and low temperatures. This improves the reliability of the lens assembly 1 and ultimately the reliability of the imaging function of the device. Furthermore, by contacting the spacer ring 50 at a position less susceptible to the influence of the lens 20, the problem of temperature drift of the lens assembly 1 due to high and low temperatures can be solved.By placing the washer 50 approximately midway between the lenses 20, the preload generated when the washer 50 is compressed can be transmitted uniformly to the lenses 20 on both sides, preventing the lenses 20 from rattling. The washer 50 can also apply preload, preventing decentering of the lenses 20 caused by the position of the lenses 20 continually changing with temperature changes.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that it can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, each example should be considered as an illustration, not a limitation, of the present application, and the scope of the present invention is not limited by the above description, but is defined by the claims. All changes within the meaning and range of equivalent elements of the claims are embraced by the present invention.

[0085] The above examples are only used to explain the technical aspects of the present application, and do not limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, it should be understood that those skilled in the art can modify or equivalently replace the technical aspects of the present application without departing from the spirit and scope of the technical aspects of the present application.

Claims

1. 1. A lens assembly comprising: a lens barrel having a light passing hole extending in a direction along the optical axis and a receiving portion provided within the light passing hole; a plurality of lenses provided in the light passing hole, the plurality of lenses having at least one of a configuration in which one of the lenses abuts on one side of the receiving portion and a configuration in which two adjacent lenses abut on opposite sides of the receiving portion; a lock ring provided in the light passing hole and screwed onto the lens barrel; a spacer ring provided in the light passing hole and between two adjacent lenses; a washer provided in the light passing hole and elastically compressible along the optical axis direction; The lens has at least one of the following configurations: a configuration in which the washer is provided between two adjacent lenses; a configuration in which the washer is provided between the spacer ring and the lens provided adjacent to the spacer ring; and a configuration in which the washer is provided between the lock ring and the lens provided adjacent to the lock ring; The lens assembly is characterized in that the washer has at least one washer, and has a first washer arranged between the spacer ring and the lens adjacent to the spacer ring, an insertion groove opens on the side of the spacer ring facing the adjacent lens, the depth of the insertion groove in the direction along the optical axis is smaller than the thickness of the first washer in the direction along the optical axis, and a portion of the adjacent lens is accommodated in the insertion groove and abuts against the first washer, causing the first washer to be elastically compressed into the insertion groove.

2. 2. The lens assembly of claim 1, wherein the compression ratio of the washer along the optical axis ranges from 20% to 50% of the washer thickness along the optical axis, and / or the washer thickness along the optical axis ranges from 0.3 mm to 1 mm.

3. 2. The lens assembly according to claim 1, wherein the outer diameter of the washer in a direction perpendicular to the optical axis is in the range of 3 mm to 30 mm.

4. 2. The lens assembly according to claim 1, wherein the width of the washer in a direction perpendicular to the optical axis is in the range of 0.5 mm to 1 mm.

5. 2. The lens assembly according to claim 1, wherein the washer has a notch, and the angle of the notch is in the range of 5° to 45°.

6. 2. The lens assembly according to claim 1, wherein the cross section of said washer taken along the optical axis and passing through the geometric center has one of a circular, elliptical, rectangular, hexagonal, and octagonal shape.

7. 2. The lens assembly of claim 1, wherein the washer has a Shore hardness range of 20-70.

8. 2. The lens assembly of claim 1, further comprising a filter provided on a side of the locking ring facing away from the lenses or on a side of the locking ring facing the lenses, and wherein the washer is further provided between the filter and the lens adjacent to the filter.

9. A camera module comprising a housing, a photosensitive chip, and a lens assembly according to any one of claims 1 to 8, wherein the photosensitive chip is mounted within the housing, the housing has a mounting hole, the lens assembly is mounted within the mounting hole, and the optical axis of the lens assembly is coaxial with the photosensitive chip.

10. A terminal comprising the camera module according to claim 9.

Images