Lens, camera module and terminal

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 the lens, the lock ring may be significantly tilted due to factors such as the processing accuracy, tolerance, and glass-plastic hard contact of at least one of the threads of the lens barrel and the lock ring, which may cause the lock ring to come into contact with the adjacent lens on one side or cause the lens to be pushed and tilted. In addition, the lens surface shape may be deformed, the reliability of the lens may be reduced, and the shooting performance of the lens may be adversely affected. Summary of the Invention [Problem to be solved by the invention]

[0003] In order to solve the above problems, 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 an 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 one side of the receiving portion and / or two adjacent lenses abutting opposite sides of the receiving portion; a lock ring provided in the light passing hole and screwed to 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 ring is provided between two adjacent lenses, and / or the washer ring is provided between the spacer ring and the lens provided adjacent to the spacer ring, and / or the washer ring is provided between the lock ring and the lens provided adjacent to the lock ring.

[0005] In the above lens assembly, after a plurality of lenses, a spacer ring, and a washer ring are assembled in a light passage hole of a lens barrel, they are fixed and locked by a lock ring. A spacer ring is disposed between two adjacent lenses, and / or a washer is provided between the spacer ring and a lens provided adjacent to the spacer ring, and / or a washer is provided between the lock ring and a lens provided adjacent to the lock ring, and the washer is compressed and deformed by the locking force of the lock ring. The washer absorbs most of the locking force by its own deformation, and can increase the frictional force between the washer, the lock ring, and the lens. This is advantageous for fixing the lens, and improves safety and reliability. In addition, the washer can solve the problem that a cantilever force is applied to the lens when the lock ring is tilted by its own deformation, which makes the lens loose, and a preload is generated when the washer is deformed, and when the lens is switched between high and low temperatures, the washer presses the lens with a preload, which solves the problem of the lens loosening at high and low temperatures, and improves 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 changes in temperature.

[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 on the lens by 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. the washer can be prevented from becoming too thick, which is 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 a 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 to process 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-mentioned lens assembly, by specifying the width range of the washer, 1. it is possible to prevent the pressure caused by the compression of the washer from exceeding the receiving range of the lens and becoming too large, which would cause deformation of the lens, and 2. it is advantageous for processing the washer.

[0012] In one embodiment, the washer is provided with a notch, and the angle range of the notch is 5° to 45°.

[0013] In the above lens assembly, the washer is provided with a notch, which effectively solves the problem of the large tolerance of the outer diameter of the washer, and when the outer diameter of the washer is large, the outer diameter can be pressed toward the notch, which is favorable for miniaturizing the lens design and optimizing the lens structure. By defining the angle range of the notch, it is favorable for applying a force evenly 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-mentioned lens assembly, by specifying the cross-sectional shape of the washer ring, the washer ring can be compressed so that both surfaces along the optical axis can come into planar 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-described 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 comprises a filter on a side where the locking ring faces away from the lenses or on a side where the locking ring faces the lenses, and the washer is further provided between the filter and the lens adjacent to the filter.

[0019] The lens assembly can have a filtering function by providing the filter. By providing a washer between the filter and the lens adjacent to the filter, the lens can be sealed and impurities such as water and dust can be prevented from entering the inside 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 described in any of the above embodiments, the photosensitive chip is mounted in the housing, a mounting hole is formed in the housing, the lens assembly is mounted in the mounting hole, and an optical axis of the lens assembly is coaxial with the photosensitive chip.

[0021] In the above camera module, after assembling a plurality of lenses, a spacer ring, and a washer ring in the light passage hole of the lens barrel, they are fixed and locked by a lock ring. A spacer ring is disposed between two adjacent lenses, and / or a washer is provided between the spacer ring and the lens provided adjacent to the spacer ring, and / or a washer is provided between the lock ring and the lens provided adjacent to the lock ring, and the washer is compressed and deformed by the locking force of the lock ring. The washer absorbs most of the locking force by its own deformation, and can increase the frictional force between the washer, the lock ring, and the lens. This is advantageous for fixing the lens, and improves safety and reliability. In addition, the washer can solve the problem that the force applied to one side of the lens is likely to loosen when the lock ring is tilted by its own deformation, and a preload is generated when the washer is deformed, and when the lens is switched between high and low temperatures, the washer presses the lens with the preload, solving the problem of the lens loosening at 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 changes in temperature.

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

[0023] In the above terminal, after assembling a plurality of lenses, a spacer ring, and a washer ring in the light passage hole of the lens barrel, they are fixed and locked by a lock ring. A spacer ring is disposed between any two adjacent lenses among the plurality of lenses, and / or a washer is provided between the spacer ring and any lens provided adjacent to the spacer ring, and / or a washer is provided between the lock ring and the lens provided adjacent to the lock ring, and the washer is compressed and deformed by the locking force of the lock ring. The washer absorbs most of the locking force by its own deformation, and can increase the frictional force between the washer, the lock ring, and the lens. This is advantageous for fixing the lens, and improves safety and reliability. In addition, the washer can solve the problem that the force applied to one side of the lens is likely to loosen when the lock ring is tilted by its own deformation, and a preload is generated when the washer is deformed, and when the lens is switched between high and low temperatures, the washer presses the lens with the preload, solving the problem of the 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 changes in temperature. [Brief description of the drawings]

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

[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 merely an example and does not limit the present application.

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

[0027] 1, the present application Example 1 provides a lens assembly 1. The lens assembly 1 includes a lens barrel 10, a plurality of lenses 20, a lock ring 30, a spacer ring 40, and a washer ring 50. The 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. The lens barrel 10 has a light passing hole 12 opening therein and extending in the direction of the optical axis 200, and a receiving portion 14 is provided inside the lens barrel 10 so as to protrude in the direction of the light passing hole 12, and the receiving portion 14 protrudes onto the inner wall of the lens barrel 10 in a direction perpendicular to the optical axis 200. In this embodiment, the receiving portion 14 is located on the object side of the light passing hole 12, and the receiving portion 24 abuts and receives the lens 20. A female screw is provided on the inner wall of the lens barrel 10 near the image side. The lenses 20 are all provided in the light passing hole 12, and among the lenses 20, two or more adjacent lenses 20 may be connected, two or more lenses 20 may be provided at intervals, or the connected lenses 20 may be provided at intervals from each other, one lens 20 may abut one side of the receiving portion 14, and / or two adjacent lenses 20 may abut on opposite sides of the receiving portion 14. In this embodiment, the number of lenses 20 is six, and four lenses 20 from the image side to the object side (from top to bottom) are provided at a distance from each other, and the remaining two lenses 20 are connected to the image side of the receiving portion 14, so that the last lens 20 abuts on 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 into 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 realizing the screwing of the lock ring 30 and the lens barrel 10.

[0029] The spacer ring 40 is provided in the light passing hole 12 and between two adjacent lenses 20. The multiple lenses 20 can be divided into multiple sets of two adjacent lenses 20, and one, two, or multiple sets of the multiple sets of two adjacent lenses 20 can be provided with a spacer ring 40. In this embodiment, the number of spacer rings 40 is four, and each spacer ring 40 is provided between one adjacent two lenses 20 or between an adjacent lens 20 and a lens set. The thickness of the spacer ring 40 in the direction along the optical axis 200 is set according to actual needs, and this embodiment is not limited thereto. In another embodiment, the number of spacer rings 40 may be provided according to actual design needs, and the present application does not limit the specific number and position of the spacer rings 40.

[0030] The washer 50 is provided in the light passing hole 12 and is elastically compressible in a direction along the optical axis 200, i.e., the washer 50 can be compressed to generate a preload force, and can elastically return to its original state after the pressure is removed. The washer 50 is provided between two adjacent lenses 20, or between the lens 20 and the lens set, and / or the washer 50 is provided between the spacer ring 40 and the lens 20 or lens set provided adjacent to the spacer ring 40, and / or the washer 50 is provided between the lock ring 30 and the lens 20 or lens set provided adjacent to the lock ring 30. That is, the washer 50 may be provided between two adjacent lenses 20, or between the spacer ring 40 and the lens 20 provided adjacent to the spacer ring 40. The washer 50 may also be provided between the lock ring 30 and the lens 20 provided adjacent to the lock ring 30. The washer 50 may be provided between all of the above positions, or at some of the positions. Specifically, the spacer ring 50 may 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, the fitting groove 42 is opened on the image side of the spacer ring 40, and the width of the fitting groove 42 in the direction along the optical axis 200 is smaller than the thickness of the washer ring 50 in the direction along the optical axis 200. The washer ring 50 is positioned in the fitting groove 42 and is elastically compressed by the abutment of the lens 20. By providing the washer ring 50 in the fitting groove 42, the space utilization rate can be improved.

[0031] The lens assembly 1 described above is a lens assembly in which a plurality of lenses 20, a plurality of spacer rings 40, and a washer ring 50 are assembled in the light passage hole 12 of the lens barrel 10. The plurality of lenses 20, the plurality of spacer rings 40, and the washer ring 50 are locked by screwing the lock ring 30 into the image side of the lens barrel 10. However, the image side of the washer ring 50 is higher than the image side of the spacer ring 40, and the washer ring 50 is provided between the lens 20 and the spacer ring 40. The washer ring 50 is compressed and deformed indirectly by the locking force of the lock ring 30, and even after being compressed, it can contact and support the spacer ring 40 and the lens 20. The parallelism of the lens assembly 1 after assembly is not affected by the machining accuracy and tolerance of the washer ring 50, and the washer 50 absorbs a large amount of locking force by its own deformation, and the frictional force between the washer ring 50 and the spacer ring 40 and the lens 20 can be increased. Furthermore, the frictional force between the lock ring 30 and the lens 20, the frictional force between the lens 20 and the spacer ring 40, and the frictional force between the lens assembly and the receiving portion 14 can be increased. This allows the lens 20, the spacer ring 40, and the washer ring 50 to be fixed better, and even if a strong impact force is applied, the lens 20 can be fixed reliably, and the safety and reliability of the lens assembly 1 can be improved. In addition, the washer ring 50 can solve the problem that the lens 20 is easily loosened when the lock ring 30 is tilted due to its own deformation, and when the washer ring 50 deforms, a preload is generated, and when the lens assembly 1 switches between high and low temperatures, the washer 50 presses the lens 20 with the preload, solving the problem that the lens assembly 1 is easily loosened at high and low temperatures, and improving the reliability of the lens assembly 1. In addition, by contacting the spacer ring 50 at a position that is less susceptible to the influence of the lens 20, the temperature drift problem due to high and low temperatures in the glass and plastic mixed structure of the lens assembly 1 can be solved.By placing the washer 50 approximately in the middle of the lenses 20, the preload generated when the washer 50 is compressed can be uniformly transmitted to the lenses 20 on both sides, preventing the lenses 20 from wobbling. 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 of Comparative Example 1 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, and is different in that the lens assembly of Comparative Example 1 does not have a washer ring 50. After assembling the lenses 20 and the spacer rings 40 in the light passage hole 12 of the lens barrel 10, the lenses 20 and the spacer rings 40 are locked by screwing the lock ring 30 to the lens barrel 10. Since the washer ring 50 is not provided, the lock ring 30 is tilted due to processing tolerance, and the lock ring 30 and the adjacent lenses 20 contact each other only on one side, pushing and tilting the lenses 20. In an actual fall test, among the lenses 20, there are lenses 20 whose surface shape is crushed by pressure, and the reliability of the lenses cannot meet the fall requirements. In an actual high temperature and low temperature switching test, the lenses 20 are decentered due to rattling between the lenses 20, and the reliability of the lenses cannot meet the high temperature and low temperature switching requirements.

[0033] 2 and 3, in this embodiment, the washer 50 has a notch 52 (the washer 50 is substantially C-shaped), and the angle A of the notch 52 is in the range of approximately 5° to 45°, for example, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, etc. In this way, the notch 52 is opened in the washer 50, so that the problem of the large outer diameter tolerance of the washer 50 can be effectively solved. If the outer diameter of the washer 50 becomes large in the manufacturing process, when the lock ring 30 contacts the washer 50 during assembly of the lens assembly 1, the washer 50 is pressed and deformed. On the other hand, since the washer 50 has the notch 52, the lock ring 30 can contract 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 surfaces, and the washer 50 does not twist due to its large outer diameter, resulting in 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 in optimizing the configuration of the lens assembly 1 and improving the range of use of the washer 50. Specifying the angle range of the notch 52 is advantageous in making the biasing force of the washer 50 uniform. However, if the angle A of the notch 52 is less than 5°, the angle of the notch 52 is small, and machining the notch 52 is difficult. This is because machining the notch 52 on the washer 50 is disadvantageous, and the washer 50 may have poor adaptability to deformation when pressed, may be twisted under force and cause a gap, and may not 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 after the washer 50 is pressed and the notch 52 is contracted may be large. Therefore, the washer 50 cannot apply a uniform elastic force to the lens 20, and the lens 20 is easily tilted, which affects 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 machining 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, but is different in that the angle of the notch 52 of the washer 500 is 50°. After the lenses 20, the spacer rings 40, and the washer 50 are assembled in 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. Since the angle of the notch 52 of the washer 50 is 50°, the angle after the washer 50 is pressed and the notch 52 is contracted is still large (in multiple actual tests, the angle at which the notch 52 is contracted is between 45° and 48°). Therefore, a part of the area of ​​the washer 50 cannot apply elastic force to the lens 20. In an actual high-temperature and low-temperature switching test, the lens 20 that abuts on 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, but is different in 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 in the light passage hole 12 of the lens barrel 10, the lenses 20, the spacer rings 40, and the washer 50 are screwed into the lens barrel 10 by the lock ring 30 to lock the lenses 20, the spacer rings 40, and the washer 50. Since the angle of the notch 52 of the washer 50 is 60°, the angle after the washer 50 is pressed and the notch 52 is contracted is still large (in multiple actual tests, the angle at which the notch 52 is contracted is between 46° and 54°). Therefore, a part of the area of ​​the washer 50 cannot impart elastic force to the lens 20. In the actual high-temperature and low-temperature switching test, the lens 20 abutting on 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 range of the outer diameter B of the washer 50 in the direction perpendicular to the optical axis 200 is 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. In this way, 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 completely contacted 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 larger than 30 mm, the outer diameter of the washer 50 becomes too large, and when applied to most commercially available lenses, the periphery of the washer 50 is easily bent and deformed under force, resulting in an irresolvable gap in the direction of the optical axis 200. This affects the parallelism and reliability of the lens assembly 1, and the larger outer diameter of the washer 50 increases the diameter of the lens assembly 1, which is disadvantageous in realizing a compact design of 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 of Comparative Example 5 (not shown) 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, and processing may fail, or even if processing is successful, the outer diameter of the washer 50 after processing is small, and the hole diameter after drilling is smaller than the photosensitive area of ​​the photosensitive chip or the effective light transmitting area of ​​the lens 20, resulting in poor imaging, or the washer 50 breaking after drilling and becoming unusable.

[0045] Comparative Example 6 The lens of Comparative Example 6 (not shown) 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 the lenses 20, the spacer rings 40, and the washer 50 are assembled in the light passing 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. Since the outer diameter of the washer 50 reaches 40 mm, the peripheral edge of the washer 50 is subjected to force and is bent and deformed, and a gap that cannot be eliminated in the direction of the optical axis 200 is generated between the washer 50 and the lock ring 30 and / or between the washer 50 and the adjacent lens 20 (this gap is formed by the bent peripheral edge of the washer 50). As a result, the elastic force that the washer 50 exerts on the lens 20 becomes large, 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 range of the width C of the washer 50 in the direction perpendicular to the optical axis 200 is approximately 0.5 mm to 1 mm, for example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc. In this way, by defining the range of the width C of the washer 50, 1. the pressure caused by the compression of the washer 50 exceeds the receiving range of the lens and becomes too large, which causes the lens to be deformed, and 2. it is advantageous for processing the washer. However, if the width C of the washer 50 is smaller than 0.5 mm, the width of the washer 50 exceeds the lower limit of processing, which is disadvantageous for processing the washer 50. If the width C of the washer 50 is larger than 1 mm, the pressure generated by pressing the washer 50 is too large and easily exceeds the receiving range of the lens, and also, since the width of the washer 50 is large, the effective light transmission area of ​​the lens 20 is easily blocked, which affects the shooting performance of the lens assembly 1.

[0047] Table 3 shows the range of widths of the washer 50 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, the processing fails because it exceeds the lower processing limit. Or, even if the processing is successful, during actual assembly, because the width of the washer 50 is narrow, the washer 50 is twisted by the lock ring 30 and the washer 50 breaks, and the washer 50 cannot apply a stable and effective preload, and cannot be used normally.

[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 the lenses 20, the spacer rings 40, and the washer 50 are assembled in the light passing 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. Since the width of the washer 50 reaches 2 mm, the washer 50 blocks the effective light transmitting area of ​​the lens 20. In an actual shooting test, the amount of light entering the lens is reduced, the periphery of the image shot using the lens is blurred, and the reliability of the lens does not meet the shooting requirements.

[0051] In this embodiment, the range of the thickness T of the washer 50 in the direction along the optical axis 200 is 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. In this way, by limiting the range of the thickness T of the washer 50, 1. the washer 50 is prevented from becoming too thick, which is disadvantageous for assembling the lens 1, the washer 50 is easily deformed by pressure and generates elastic force, and the elastic force is applied to the lens 20, etc., and 2. the washer 50 is easily processed. However, if the thickness T of the washer 50 is smaller than 0.3 mm, the thickness of the washer 50 exceeds the lower limit of processing, which is disadvantageous for processing the washer 50. If the thickness T of washer 50 is greater than 1 mm, the thickness of washer 50 will be too thick, making it difficult for washer 50 to deform under pressure, which will affect the assembly of lens 1 and make it more likely to be damaged by being subjected to force when pressed against other objects such as lens 20 during assembly, affecting the reliability of lens assembly 1 and / or lengthening the lens barrel 10, which is detrimental to the miniaturization of 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 of Comparative Example 9 (not shown) has a configuration similar to that of the lens assembly 1 of Example 1, but is different in that the thickness T of the washer 50 along the optical axis 200 is 0.2 mm in Comparative Example 9. Because the thickness of the washer 50 is small, the processing limit is exceeded and processing fails. Or, even if processing is successful, the thickness of the washer 50 is narrow, so that during actual assembly, the washer 50 is twisted by the lock ring 30 and the washer 50 breaks, and the washer 50 cannot apply a stable and effective preload, and cannot be used normally.

[0055] Comparative Example 10 The lens of Comparative Example 10 (not shown) 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 the lenses 20, the spacer rings 40, and the washer 50 in the light passage hole 12 of the lens barrel 10, the lenses 20, the spacer rings 40, and the washer 50 are screwed into the lens barrel 10 by the lock ring 30 to lock them. Since the thickness of the washer 50 reaches 1.5 mm, the thickness of the washer 50 is still thick after it is pressed and compressed (in multiple actual tests, the thickness of the washer 50 after compression is between 1 mm and 1.2 mm), and the washer 50 occupies a part of the thickness along the optical axis 200 in the light passage hole 12, and the lock ring 30 cannot be completely attached to the image side of the lens barrel 10 and connected, resulting in failure in assembling the lens assembly.

[0056] In this embodiment, the range of the compression ratio of the washer 50 in the optical axis 200 direction is 20% to 50% of the thickness T of the washer 50 in the optical axis 200 direction, for example, 20%, 30%, 40%, 50%, etc. In this way, by limiting the compression ratio of the washer 50, 1. the washer 50 can generate a uniform elastic force by its own deformation, and a stable fixing effect can be provided to the lens 20, and 2. the washer 50 is prevented from being excessively compressed and permanently deformed, or from being unable to compress and deform under force, and unable to generate an elastic force. However, if the compression ratio of the washer 50 is less than 20%, the preload of the washer 50 is small, and a stable fixing effect cannot be provided to the lens 20, and the washer 50 is difficult to compress, and since the washer 50 is hard, the washer 50 is difficult to compress and deform when assembling the lock ring 30, and there are cases where the washer 50 presses other objects such as the lens 20 and breaks. If the compression ratio of the washer 50 is greater than 50%, the washer 50 will be permanently deformed when pressed, and the elastic force of the washer 50 caused by compression will be lost. As a result, the washer 50 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 a range of 5% of the thickness T of the washer 50 in the direction along the optical axis 200 in Comparative Example 11. After assembling the lenses 20, the spacer rings 40, and the washer 50 in the light passing hole 12 of the lens barrel 10, the lenses 20, the spacer rings 40, and the washer 50 are screwed into the lens barrel 10 by the lock ring 30 to lock them. Since the compression ratio of the washer 50 is 5%, the preload caused by the compression of the washer 50 is small. In the actual high temperature and low temperature switching test, the lens 20 is decentered due to rattle between the three lenses 20 located on the object side of the washer 50, and the reliability of the lens cannot meet the high temperature and low temperature switching requirements.

[0060] Comparative Example 12 The lens of Comparative Example 12 (not shown) 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 in Comparative Example 12 is 60% 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 in the light passing hole 12 of the lens barrel 10, the lenses 20, the spacer rings 40, and the washer 50 are screwed into the lens barrel 10 by the lock ring 30 to lock them. Since the compression ratio of the washer 50 is 60%, the washer 50 is permanently deformed after being compressed, and the lens 20 cannot be preloaded. In an actual high-temperature and low-temperature switching test, the lens 20 is decentered due to rattle between the lenses 20, and the reliability of the lens cannot 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. In this way, by specifying the Shore hardness range of the washer 50, 1. the locking force of the lock ring 30 can be reduced by the deformation of the washer 50 itself, the washer 50 becomes easily compressed, and the lock ring 30 does not collide with the lock ring 30 when applying the locking force, and 2. the deformation of the washer 50 when it rotates with the lock 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 easily twisted and deformed following the rotation of the lock ring 30, so the washer 50 cannot reduce the locking force of the lock ring 30, and the lock ring 30 applies the locking force to other objects such as the lens 20, which affects 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, causing lock ring 30 to be unable to be 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 of 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, but is different in that the Shore hardness of the washer 500 in Comparative Example 13 is 10. After assembling the lenses 20, the spacer rings 40, and the washer 50 in 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 them into the lens barrel 10 with the lock ring 30. Since the washer 50 has a Shore hardness of 10, when assembling the lock ring 30, the washer 50 is soft and is twisted and deformed together with the lock ring 30. Therefore, the washer 50 cannot apply a stable preload to the lens 20, and in an actual high-temperature and low-temperature switching test, rattling occurs between the lenses 20, which may cause decentering of the lenses 20, and the reliability of the lens cannot 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, but is different in that the Shore hardness of the washer 50 of Comparative Example 14 is 80. After the lenses 20, the spacer rings 40, and the washer 50 are assembled into the light passing 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. Since the Shore hardness of the washer 50 reaches 80, the washer 50 is difficult to compress and deform when assembling the lock ring 30, and the lock ring 30 cannot be completely in close contact with and connected to the image side of the lens barrel 10, resulting in 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 manner, the washer 50 is compressed so that both surfaces in the direction along the optical axis can come into planar contact with the corresponding lens 20, lock ring 30, and spacer ring 40, and the force applied to the lens 20 becomes more uniform. In another embodiment, the cross-section of the washer 50 passing through the geometric center along 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 therein may be understood as the compression force corresponding to the compression ratio. As can be seen from the relationship between the hardness, cross-sectional diameter, outer diameter, compression ratio, and compression force of washer 50 shown in FIG. 4 , washer 50 generates appropriate compression forces under different conditions, thereby keeping changes in lens 20 small during impact and high-temperature switching processes, and 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 multiple lenses 20. In this manner, 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, the lens assembly 2 according to the second embodiment of the present invention provides a lens assembly 2. The lens assembly 2 according to the second embodiment has a configuration similar to that of the lens assembly 1 according to the first embodiment, and the difference is that in this embodiment, the number of lenses 20 is four, and the two intermediate lenses 20 are connected to form a lens group. This lens group is provided apart from the two lenses 20 on both sides, and the number of spacer rings 40 is one, and the spacer ring 40 is 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 the number of lock rings 30 is two. The two lock rings 30 are screwed to both ends of the lens barrel 10, and the filter 60 is provided on the image side of the lock ring 30 located on the image side. Among them, the washer ring 50 is provided between the lock ring 30 located on the image side and the adjacent lens 20. In this way, by providing the washer 50 between the lock ring 30 and the lens 20, when the lock ring 30 applies a locking force, the washer 50 is deformed by the locking force, and the washer 50 absorbs most of the locking force by its own deformation, preventing the lens 20 and the lock ring 30 from coming into hard contact, reducing the distortion of the lens 20, and solving the problem that the lens 20 is easily subjected to a cantilever force when the lock ring 30 is tilted. In addition, the friction force between the washer 50 and the lens 20 is increased by the locking force of the lock ring 30, which is advantageous in better fixing the lens 20 and increasing safety when the lens 20 is subjected to a mechanical shock. By providing the washer 50 between the lock ring 30 and the lens 20, it also plays a role in sealing the lens assembly 2, and can prevent impurities such as water and dust from entering the light passing hole 12. By providing the washer ring 50 between the lock ring 30 and the lens 20, the washer ring 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 the washer 50 in a direction parallel to the optical axis 200 is rectangular. Referring to Fig. 6, as can be seen from the relationships between the hardness, width, thickness, outer diameter, compression ratio and pressing force of the washer 50 shown in Fig. 6, the washer 50 generates appropriate pressing forces under different conditions, and keeps changes in the lens 20 small during impact and high / low temperature switching, thereby improving the safety and reliability of the lens assembly 2.

[0071] Referring to FIG. 7, Example 3 of the present application provides a lens assembly 3. The lens 3 according to Example 2 has a configuration almost similar to that of the lens assembly 2 according to Example 2, with the difference being that in this embodiment, 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 way, the lock ring 30 pre-compresses the washer 50 when applying a locking force, which increases the frictional force between the lens 20 and the receiving portion 14 of the lens barrel 10 and is advantageous for better fixing the lens 20. However, the more lenses 20 in the lens assembly 3, the higher the fixing effect.

[0072] 8, in this embodiment, four bosses 54 are evenly provided on the inside of the washer 50, and four groove structures (not shown) corresponding to the four bosses 54 are opened on the image side of the receiving part 14 of the lens barrel 10, and when the washer 50 is placed on the receiving part 14, the four bosses 54 are located in the corresponding four groove structures. In this way, by providing the bosses 54 evenly on the inside of the washer 50, the lock ring 30 can be better matched with the circular structure, the twisting force can be further reduced, and other parts such as the lens 20 can be prevented from being deformed by twisting. Also, by providing the bosses 54 evenly on the inside of the washer 50, the bosses 24 can press the lens 20 to increase the friction force.

[0073] In other embodiments, fewer or more bosses 54, for example two, five, etc., may be provided on the inside of the washer 50, and specifically, 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 substantially similar to that of the lens assembly 2 of Example 2, except that in this example, a washer 50 is provided between two intermediate lenses 20. By providing the washer 50 between two adjacent lenses 20 in this manner, the washer 50 increases the frictional force between the two adjacent lenses 20 due to its own deformation, which is advantageous for fixing the lenses 20, and the washer 50 functions as a spacer ring 40, allowing the two adjacent lenses 20 to be spaced apart from each other.

[0075] 10, the present application provides a lens assembly 5. The lens assembly 5 according to the embodiment 5 has a configuration similar to that of the lens assembly 2 according to the embodiment 2, except that in this embodiment, the filter 60 is provided on the object side of the lock ring 30 located on the image side, and the 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 by its own deformation, which is advantageous for fixing the lens 20, and the washer 50 also plays a role in sealing the lens assembly 5, preventing impurities such as water and dust from entering the light transmission hole 12.

[0076] Referring to Fig. 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 the lens assembly 1 of Example 1, except that the number of washers 50 is two, one washer 50 is provided between two adjacent lenses 20 on the object side, and the other washer 50 is provided between the intermediate lens 20 and the spacer ring 40 on the object side. 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, and the two washers 50 generate preload forces by their respective deformations, which increases the frictional force between the lock ring 30, the lenses 20, and the spacer ring 40, which is advantageous for fixing the lenses 20, and improves the resistance of the lens assembly 6 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, the cross-sectional shape of one washer 50 may be circular and the cross-sectional shape of the other washer 50 may be rectangular.

[0077] Referring to Fig. 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 the lens assembly 2 of Example 2, except that the number of washers 50 in this example is two, one of which is provided between the lock ring 30 located on the image side and the lens 20, and the other washer 50 is provided between the object side of the lens group and the image side of the receiving portion 14. By providing two washers 50 in this way, when the lock ring 30 locks the multiple lenses 20, the spacer ring 40, and the two washers 50, the two washers 50 are pressed together and deformed, and the two washers 50 generate preload forces due to their respective deformations, which increase the frictional forces 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 resistance of the lens assembly 7 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, the number of washers 50 is three, 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 ring 40 and the receiving portion 14, which is advantageous for fixing the lens 20 and improves the resistance of the lens assembly 8 to mechanical impact forces.

[0079] 14, Example 9 of the present application provides a lens assembly 9. The lens assembly 9 of the example has a configuration similar to that of the lens assembly 2 of Example 2, and is different in that in this example, the 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 the washer 50 is located in the stopper groove 21 and abuts between the lock ring 30 and the groove bottom of the stopper groove 21. In this way, by opening the stopper groove 21 on the image side periphery of the lens 20 close to the image side, when assembling the lock ring 30, it is possible to prevent the washer 50 from rotating together with the lock ring 30 due to the stopper groove 21 and moving toward the center of the lens 20, and the assembly yield of the lens assembly 9 can be guaranteed.

[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 arranged coaxially 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 above camera module, the lens assembly 1 is a lens assembly in which a plurality of lenses 20, a plurality of spacer rings 40, and a washer ring 50 are assembled in the light passage hole 12 of the lens barrel 10. The plurality of lenses 20, the plurality of spacer rings 40, and the washer ring 50 are locked by screwing the lock ring 30 into the image side of the lens barrel 10. However, the image side of the washer ring 50 is higher than the image side of the spacer ring 40, and the washer ring 50 is provided between the lens 20 and the spacer ring 40. The washer ring 50 is compressed and deformed by indirectly receiving the locking force of the lock ring 30, and even after being compressed, it can contact and support the spacer ring 40 and the lens 20. The parallelism of the lens assembly 1 after assembly is not affected by the processing accuracy and tolerance of the washer ring 50, and the washer ring 50 absorbs a large amount of locking force by its own deformation, and the frictional force between the washer ring 50 and the spacer ring 40 and the lens 20 can be increased. Furthermore, the frictional force between the lock ring 30 and the lens 20, the frictional force between the lens 20 and the spacer ring 40, and the frictional force between the lens assembly and the receiving portion 14 can be increased. This allows the lens 20, the spacer ring 40, and the washer ring 50 to be fixed better, and even if a strong impact force is applied, the lens 20 can be fixed reliably, and the safety and reliability of the camera module can be improved. In addition, the washer ring 50 can solve the problem that the lens 20 is easily loosened when the lock ring 30 is tilted due to its own deformation, and when the washer ring 50 deforms, a preload is generated, and when the lens assembly 1 switches between high and low temperatures, the washer 50 presses the lens 20 with the preload, solving the problem that the lens assembly 1 is easily loosened at high and low temperatures, and improving the reliability of the lens assembly 1. In addition, by contacting the spacer ring 50 at a position that is less susceptible to the influence of the lens 20, the temperature drift problem due to high and low temperatures in the glass and plastic mixed structure of the lens assembly 1 can be solved.By placing the washer 50 approximately in the middle of the lenses 20, the preload generated when the washer 50 is compressed can be uniformly transmitted to the lenses 20 on both sides, preventing the lenses 20 from wobbling. 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, and 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 drive recorder, a security monitor, an AR device, a VR device, a mobile phone, a tablet, a smart watch, etc.

[0083] In the above terminal, the lens assembly 1 of the camera module is a lens assembly in which a plurality of lenses 20, a plurality of spacer rings 40, and a washer ring 50 are assembled in the light passage hole 12 of the lens barrel 10. The plurality of lenses 20, the plurality of spacer rings 40, and the washer ring 50 are locked by screwing the lock ring 30 into the image side of the lens barrel 10. However, the image side of the washer ring 50 is higher than the image side of the spacer ring 40, and the washer ring 50 is provided between the lens 20 and the spacer ring 40. The washer ring 50 is compressed and deformed indirectly by the locking force of the lock ring 30, and even after being compressed, it can contact and support the spacer ring 40 and the lens 20. The parallelism of the lens assembly 1 after assembly is not affected by the processing accuracy and tolerance of the washer ring 50, and the washer ring 50 can absorb a large amount of locking force by its own deformation, and the frictional force between the washer ring 50, the spacer ring 40, and the lens 20 can be increased. Furthermore, the frictional force between the lock ring 30 and the lens 20, the frictional force between the lens 20 and the spacer ring 40, and the frictional force between the lens assembly and the receiving portion 14 can be increased. This allows the lens 20, the spacer ring 40, and the washer ring 50 to be fixed better, and even if a strong impact force is applied, the lens 20 can be fixed reliably, and the safety and reliability of the lens assembly 1 can be improved. In addition, the washer ring 50 can solve the problem that the lens 20 is easily loosened when the lock ring 30 is tilted due to its own deformation, and when the washer ring 50 deforms, a preload is generated, and when the lens assembly 1 switches between high and low temperatures, the washer 50 presses the lens 20 with the preload, solving the problem that the lens assembly 1 is easily loosened at high and low temperatures, improving the reliability of the lens assembly 1 and ultimately improving the reliability of the imaging function of the terminal. In addition, by contacting the spacer ring 50 at a position that is 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 in the middle of the lenses 20, the preload generated when the washer 50 is compressed can be uniformly transmitted to the lenses 20 on both sides, preventing the lenses 20 from wobbling. 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 is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and 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 example rather than 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. It is to be understood that all changes within the meaning and scope of the equivalent elements of the claims are included in 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, those skilled in the art should understand that the technical aspects of the present application can be modified or substituted with equivalents 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 an 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, respectively; a lock ring provided in the light passing hole and screwed to 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; A lens assembly having at least one of the following configurations: a configuration in which the washer ring is provided between two adjacent lenses; a configuration in which the washer ring is provided between the spacer ring and the lens provided adjacent to the spacer ring; and a configuration in which the washer ring is provided between the lock ring and the lens provided adjacent to the lock ring.

2. 2. The lens assembly of claim 1, wherein the compression ratio of the washer along the optical axis is in the range of 20% to 50% of the thickness of the washer along the optical axis, and / or the thickness of the washer along the optical axis is in the range of 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 of claim 1, wherein the washer is provided with a notch, the angle of the notch being in the range of 5 degrees to 45 degrees.

6. 2. The lens assembly according to claim 1, wherein a cross-sectional shape of said washer ring taken along the optical axis and passing through the geometric center thereof is any one of a circle, an ellipse, a rectangle, a hexagon, and an octagon.

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 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 an optical axis of the lens assembly is coaxial with the photosensitive chip.

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

Images