Lens module and electronic equipment

Abstract

The invention provides a lens module and electronic equipment, and relates to the technical field of optical lenses, and the lens module comprises a front lens barrel assembly, an aperture assembly and a rear lens barrel assembly which are sequentially connected along a main optical axis direction, and the front lens barrel assembly comprises a front lens barrel body and an optical lens arranged in an inner cavity of the front lens barrel body. The rear lens barrel assembly comprises a rear lens barrel body and an optical lens arranged in an inner cavity of the rear lens barrel body; the aperture assembly comprises a main body structure; the edge of the main body structure extends outwards to form a fixing part, the aperture assembly is axially pressed and fixed by the front lens barrel body and the rear lens barrel body through the fixing part, and a gap is formed between the main body part of the aperture assembly and at least one of the front lens barrel body and the rear lens barrel body. Through the ingenious combined structure design, the variable diaphragm is integrated in the closed lens cone structure, and the better assembly precision and the working precision and stability of aperture adjustment are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical lens, in particular to a lens module and an electronic device. BACKGROUND

[0002] For an optical lens module, at least a plurality of optical lenses arranged in a lens barrel structure are used to adjust the light path, and a basic component such as a diaphragm assembly is used to constrain the light range. In the optical lens, the diaphragm assembly generally includes two categories of fixed diaphragm type and variable diaphragm type.

[0003] For the diaphragm assembly (variable aperture) of the variable diaphragm type, the size of the light passing hole passing through the center of the main light axis needs to be adjusted to adjust the size of the aperture, and the driving part for adjusting the size of the light passing hole needs to be connected to an external power supply. The size of the light passing hole is adjusted by controlling the movement of the blades of the variable aperture through the external power supply. If the variable aperture is installed on the closed lens barrel in a hanging combination, it is inevitable that the overall size of the optical lens module will be too large, and it will be difficult to apply to small size scenes or harsh external environments. If the variable aperture is fixed together with other optical elements in the optical lens, it is difficult to add the driving structure connected to the external power supply and realize the control work. Even if it is forced to be added, due to the constraint of the lens barrel structure, the added driving structure will have great limitations, and due to the closed structure, the assembly difficulty is increased, which is easy to cause poor mass production. SUMMARY

[0004] The present application provides a lens module and an electronic device. The lens module is designed by a clever combination structure, so that the variable diaphragm is integrated in the closed lens barrel structure, and the assembly precision, aperture adjustment precision and stability are ensured.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows: In one aspect of the embodiments of the present application, a lens module is provided, which includes a front lens barrel assembly, an aperture assembly and a rear lens barrel assembly connected in sequence along the direction of the main light axis. The front lens barrel assembly includes a front lens barrel body and optical lenses arranged in the inner cavity of the front lens barrel body. The rear lens barrel assembly includes a rear lens barrel body and optical lenses arranged in the inner cavity of the rear lens barrel body. The aperture assembly includes a main body structure. The main body structure has a fixed part extending outward from the edge. The aperture assembly is axially pressed and fixed by the front lens barrel body and the rear lens barrel body through the fixed part. There is a gap between the main body structure of the aperture assembly and at least one of the front lens barrel body and the rear lens barrel body.

[0006] In another aspect of the embodiments of the present application, an electronic device is provided, which includes the lens module of any one of the preceding embodiments and a photosensitive chip.

[0007] The beneficial effects of the embodiments of the present application include: the lens module provided by the embodiments of the present application comprises a front lens barrel assembly, an aperture assembly and a rear lens barrel assembly connected in sequence along the main optical axis direction, the front lens barrel assembly, the aperture assembly and the rear lens barrel assembly are sequentially mounted to form a module structure that is integrally closed, the front lens barrel assembly comprises a front lens barrel body and an optical lens arranged in the inner cavity of the front lens barrel body, the rear lens barrel assembly comprises a rear lens barrel body and an optical lens arranged in the inner cavity of the rear lens barrel body, the optical lenses in the inner cavities are used to realize the optical path required by the lens, and the aperture assembly comprises a main body structure. The fixed part extends outward from the edge of the main body structure of the aperture assembly, and the main body structure of the aperture assembly has a gap between the front lens barrel body and / or the rear lens barrel body. The fixed part extending from the edge of the main body structure supports and fixes the aperture assembly axially between the front lens barrel body and the rear lens barrel body, the stress of the aperture assembly during the fixing process is applied to the fixed part, the main body structure of the aperture assembly can be stably installed in the inner cavity between the front lens barrel body and the rear lens barrel body and will not be deformed or damaged due to long-term stress, and since the main body structure of the aperture assembly has a gap between the front lens barrel body and / or the rear lens barrel body, the mechanical stability of the movable aperture blade in the main body structure and the optical stability of the aperture opening and closing change are effectively ensured when the aperture assembly realizes the opening and closing change of the aperture. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0009] Figure 1 One of the structural schematic diagrams of a lens module provided by the embodiments of the present application; Figure 2 One of the assembly diagrams of a lens module provided by the embodiments of the present application; Figure 3 The structural composition explosion diagram of the aperture assembly in a lens module provided by the embodiments of the present application; Figure 4 The structural schematic diagram of the aperture assembly in a lens module provided by the embodiments of the present application, Figure 4 a-d are one to four of the structural schematic diagrams; Figure 5 The structural schematic diagram No. 5 of the aperture assembly in a lens module provided by the embodiments of the present application; Figure 6 The structural schematic diagram No. 6 of the aperture assembly in a lens module provided by the embodiments of the present application; Figure 7A structural schematic diagram of an aperture assembly in a lens module provided by an embodiment of the present application, Figure 7 In the structural schematic diagrams seven and eight, a and b respectively are, Figure 8 An assembly drawing two of a lens module provided by an embodiment of the present application, Figure 9 An aperture closing and opening state diagram of an aperture assembly in a lens module provided by an embodiment of the present application, Figure 10 A structural schematic diagram two of a lens module provided by an embodiment of the present application, Figure 11 A light passing schematic diagram of an aperture assembly in a lens module provided by an embodiment of the present application, Figure 12 A schematic diagram of the flatness of elements in a lens module provided by an embodiment of the present application.

[0010] Figure: 10-front lens barrel assembly; 11-front lens barrel body; 12-front adapter; 20-aperture assembly; 21-main body structure; 22-movable aperture blade; 23-fixed part; 24-FPC flexible flat cable; 30-rear lens barrel assembly; 31-rear lens barrel body; 32-cable slot; 33-rear adapter; 40-elastic adhesive body; G-gap; W1-inner side wall of the front lens barrel body; W2-inner side wall of the rear lens barrel body. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments of the present application. It should be noted that, in the case of no conflict, each feature in the embodiments of the present application can be combined with each other, and the combined embodiment is still within the protection scope of the present application.

[0012] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms “up”, “down”, “left”, “right”, “inner”, “outer” and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first”, “second”, “third” and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0013] With the increasingly wide application of automobiles in people's life travel, people have put forward more and more requirements for the auxiliary functions of automobiles in addition to the driving function, especially in the application of safe driving, which also makes the optical lens get more and more aspects of use in the automobile. However, due to the changeable and unpredictable outdoor environment, and the jolt caused by the uneven road or fast driving speed during the driving process of the automobile, the optical lens installed on the automobile needs to maintain good working stability in the relatively harsh external environment. As a closed complex optical system, the optical lens inside is usually fixedly installed in the structure inner cavity. The fixed installation form can ensure good fixed stability of the optical lens, and if the aperture assembly in the optical lens adopts a fixed diaphragm for installation and working stability, that is, the diaphragm is fixed on the optical lens or between the optical lenses in the lens barrel structure in the form of a structural part during the assembly process of the vehicle-mounted lens, it cannot adapt to the adaptive aperture adjustment when facing different light source environments, and it cannot adjust the imaging quality by adjusting the light amount of the aperture. If a variable diaphragm form is used, it can only be installed externally in the form of an external hanging lens, which increases the structure size of the entire lens module.

[0014] To solve this problem, one aspect of the embodiment of the present application provides a lens module, as shown in Figure 1 The lens module includes a front lens barrel assembly 10, an aperture assembly 20 and a rear lens barrel assembly 30 connected in sequence along the main optical axis direction, the front lens barrel assembly 10 includes a front lens barrel body 11 and an optical lens (which can be clearly seen from the Figure 1 view, not labeled in Figure 1 ), the rear lens barrel assembly 30 includes a rear lens barrel body 31 and an optical lens (which can be clearly seen from the Figure 1 view, not labeled in Figure 1 ), the aperture assembly 20 includes a main body structure 21, the main body structure 21 has a fixing portion 23 extending outward from the edge, the aperture assembly 20 is axially pressed and fixed by the front lens barrel body 11 and the rear lens barrel body 31 through the fixing portion 23, and the main body structure 21 of the aperture assembly 20 has a gap with the front lens barrel body 11 and / or the rear lens barrel body 31. That is, the main body structure 21 of the aperture assembly 20 can only have a gap with the front lens barrel body 11, or the main body structure 21 only has a gap with the rear lens barrel body 31, or the main body structure 21 has a gap with the front lens barrel body 11 and the rear lens barrel body 31.

[0015] As shown in Figure 2 , the main body structure 21 of the aperture assembly 20 has a gap G with the front lens barrel body 11 and a gap G with the rear lens barrel body 31.

[0016] AsFigure 1 As shown, the main structure 21 generally includes a plurality of movable aperture blades 22 and a driving structure respectively connected to the movable aperture blades 22 (the driving structure is Figure 1 Each movable aperture blade 22 is driven by a drive structure to open and close the aperture. The drive structure may be an electromagnetic drive, a MEMS drive, a piezoelectric drive, an SMA drive, or the like, and is not specifically limited in this embodiment of the present application.

[0017] like Figure 1 As shown, with the principal optical axis of the lens module as the X-axis, the YZ plane perpendicular to the X-axis is the plane where the mutually perpendicular Y-axis and Z-axis lie, and the Y-axis and Z-axis are any two mutually perpendicular straight lines on the YZ plane. That is, the optical lenses in the front barrel assembly 10 and the rear barrel assembly 30 are all parallel to the YZ plane.

[0018] In the direction of the main optical axis, the front lens barrel assembly 10, the aperture assembly 20 and the rear lens barrel assembly 30 are connected to each other in sequence, and the aperture assembly 20 is axially pressed and fixed by the front lens barrel assembly 10 and the rear lens barrel assembly 30 through the fixing portion 23. After completing the installation and testing of the internal optical elements, the lens module of the embodiment of the present application is formed. Wherein, the front lens barrel assembly 10 includes a front lens barrel body 11 and an optical lens installed in the inner cavity of the front lens barrel body 11, the aperture assembly 20 includes a main structure 21 and a fixing portion 23 extending outwardly along the edge of the main structure 21, and the rear lens barrel assembly 30 includes a rear lens barrel body 31 and an optical lens installed in the inner cavity of the rear lens barrel body 31. That is, without considering the internal optical elements and only looking at the external closed structure, the lens module of the embodiment of the present application is fixed by bearing pressure in the direction of the main optical axis between the front lens barrel body 11, the fixing portion 23 extending from the edge of the main structure 21 and the rear lens barrel body 31.

[0019] Specifically, such as Figure 2 As shown in the figure, the assembled lens module structure is completed, and the aperture assembly 20 is stably pressed and fixed between the front lens barrel 11 and the rear lens barrel 31 in the X-axis direction through the fixing part 23, wherein the main structure 21 of the aperture assembly 20, that is, the structure and components including the movable aperture blades 22 and other parts are not subjected to bearing pressure in all directions during the axial pressing and fixing, and there is a gap G between the main structure 21 and at least one of the front lens barrel 11 and the rear lens barrel 31.

[0020] It should be noted that if Figure 2As shown in the middle box, the gap G between the main body structure 21 and the front lens barrel body 11 or the rear lens barrel body 31 includes the space in the X-axis direction and the space in the YZ plane (e.g., the space in the Y-axis direction) between the front lens barrel body 11 and the main body structure 21, and the space in the X-axis direction and the space in the YZ plane (e.g., the space in the Y-axis direction) between the main body structure 21 and the rear lens barrel body 31. Of course, those skilled in the art should know that, for example, in the X-axis direction, there can be only a gap G between the front lens barrel body 11 and the main body structure 21, or there can be only a gap G between the main body structure 21 and the rear lens barrel body 31, or there can be a gap G between the front lens barrel body 11 and the main body structure 21 and a gap G between the main body structure 21 and the rear lens barrel body 31. As long as there is a gap G between the main body structure 21 and at least one of the front and rear mounting structures in the X-axis direction, the main body structure 21 can be effectively prevented from being deformed or damaged due to stress in the press-fit relationship between the front lens barrel body 11 and the rear lens barrel body 31.

[0021] Similarly, in the YZ plane, the main body structure 21 can have a gap G in only one direction, for example, the Y-axis direction, or can have a gap G in multiple directions, or even on the entire outer edge of the YZ plane. As long as the aperture assembly 20 is stably fixed in the lens module by the fixing portion 23, the gap G is as large as possible in the YZ plane, which is more conducive to avoiding stress deformation and damage of the main body structure 21 and other parts in the aperture assembly 20.

[0022] The lens module provided by the embodiment of the application comprises a front lens barrel assembly 10, an aperture assembly 20 and a rear lens barrel assembly 30 connected in sequence along the direction of the main optical axis, the front lens barrel assembly 10, the aperture assembly 20 and the rear lens barrel assembly 30 are sequentially mounted to form a module structure that is integrally closed, the front lens barrel assembly 10 comprises a front lens barrel body 11 and an optical lens mounted in the inner cavity of the front lens barrel body 11, the rear lens barrel assembly 30 comprises a rear lens barrel body 31 and an optical lens mounted in the inner cavity of the rear lens barrel body 31, the optical lens in the inner cavity is used to realize the optical path required by the lens, and the aperture assembly 20 comprises a main body structure 21. The aperture assembly 20 is provided with a fixing portion 23 extending outward from the edge of the main body structure 21, and the main body structure 21 of the aperture assembly 20 has a gap G with the front lens barrel body 11 and / or the rear lens barrel body 31. The fixing portion 23 extending outward from the edge of the main body structure 21 is used to axially support and fix the aperture assembly 20 between the front lens barrel body 11 and the rear lens barrel body 31, the stress of the aperture assembly 20 during the fixing process is applied to the fixing portion 23, the main body structure 21 of the aperture assembly 20 can be stably mounted in the inner cavity between the front lens barrel body 11 and the rear lens barrel body 31 and will not be deformed or damaged due to long-term stress, and since the main body structure 21 of the aperture assembly 20 has the gap G with the front lens barrel body 11 and / or the rear lens barrel body 31, the mechanical stability of the movable aperture blade 22 in the main body structure 21 and the optical stability of the aperture opening and closing change of the aperture assembly 20 are effectively ensured when the aperture assembly 20 realizes the aperture opening and closing change.

[0023] In an embodiment of the application, the fixing portion 23 is a ring-shaped boss fixedly connected to the outer edge of the main body structure 21, or the fixing portion 23 is a plurality of convex portions distributed around the outer edge of the main body structure 21.

[0024] The fixing portion 23 satisfies the axial fixing between the front lens barrel body 11 and the rear lens barrel body 31, so that the other parts of the aperture assembly 20 are not stressed in the fixing structure, and the specific structure of the fixing portion 23 and the connection relationship between the fixing portion 23 and other structures in the aperture assembly 20 are not strictly limited.

[0025] As shown in the example, Figure 3 As shown in the example, the aperture assembly 20 generally comprises the main body structure 21, the main body structure 21 comprises a plurality of movable aperture blades 22 and driving structures respectively drivingly connected to the movable aperture blades 22. Figure 3 The main body structure 21 shown in the example further comprises a lower cover and an upper cover, the plurality of movable aperture blades 22 and the driving structures are covered between the upper cover and the lower cover to protect the movable aperture blades 22 and the driving structures, and the fixing portion 23 can be as shown in the example. Figure 3The fixing part 23 can be a structure part processed separately and connected with other parts in the main body structure 21, for example Figure 3 The fixing part 23 can be a structure part processed separately and connected with other parts in the main body structure 21, for example

[0026] As shown in Figure 3 The fixing part 23 can be a structure part processed separately and connected with other parts in the main body structure 21, for example Figure 3 In the example shown in , the fixing part 23 includes four protrusions, which are evenly distributed at the outer edge of the main body structure 21. The four evenly distributed protrusions are in a ring-shaped fixing relationship, which can ensure that the aperture assembly 20 is stably fixed between the front lens barrel body 11 and the rear lens barrel body 31 in the YZ plane. The notch is formed at the position corresponding to the four protrusions on the edge of the upper cover, which can avoid the space of the four protrusions when the movable aperture blade 22 and the driving structure are buckled and fixed, so as to ensure that the aperture assembly 20 is fixed between the front lens barrel body 11 and the rear lens barrel body 31 only through the fixing part 23 of the four protrusions.

[0027] Figure 4 In addition, when the fixing part 23 is a structure in which a plurality of protrusions are distributed around the outer edge of the main body structure 21, as shown in Figure 4 , the protrusions can also have a plurality of specific arrangement forms. For example, Figure 4 a figure in Figure 3 , four protrusions are evenly distributed at the outer edge, which are similar to those in Figure 4 c figure, six protrusions are evenly distributed at the outer edge of the main body structure 21, and Figure 4 d figure, eight protrusions are evenly distributed at the outer edge. In some special application scenarios, as long as the number of protrusions is sufficient to ensure the stability of the fixing in the YZ plane, the concentric arrangement of the plurality of protrusions can also be non-uniformly distributed.

[0028] For example, in the lens module of the embodiment of the application, the shape of the protrusion is not limited. In addition to the rectangular protrusion form in Figure 3 or Figure 4 , please refer to Figure 5 , the protrusion can also be a special-shaped contour integrated structure integrated with the outer edge of the main body structure 21.

[0029] For example,Figure 6 As shown, the fixing portion 23 can also be an annular boss fixed to the main body structure 21 around the outer edge of the main body structure 21. That is, the annular boss is concentrically arranged with the main body structure 21, and the inner edge of the annular boss is integrally connected to the outer edge of the main body structure 21, or in other words, a certain diameter range of the outer edge of the main body structure 21 serves as the annular boss for compression fixing with the front lens barrel body 11 and the rear lens barrel body 31.

[0030] In an embodiment of the present application, as shown in Figure 3 The fixing portion 23 protrudes from the plane where the main body structure 21 is located, so that the other parts of the aperture assembly 20 have a gap G in the direction of the main optical axis with the front lens barrel body 11 and / or the rear lens barrel body 31.

[0031] As shown in Figure 7 The fixing portion 23 protrudes from the plane where the main body structure 21 is located in the X-axis direction. For example, as shown in Figure 7 The fixing portion 23 protrudes from the plane where the main body structure 21 is located in the X-axis direction to one side of the rear lens barrel body 31, so that when the fixing portion 23 is fixed with the rear lens barrel body 31, a gap G in the X-axis direction between the aperture assembly 20 and the rear lens barrel body 31 is supported by the part protruding from the plane where the main body structure 21 is located.

[0032] For another example, as shown in Figure 7 The fixing portion 23 protrudes from the plane where the main body structure 21 is located in the X-axis direction to one side of the front lens barrel body 11, so that when the fixing portion 23 is fixed with the front lens barrel body 11, a gap G in the X-axis direction between the aperture assembly 20 and the front lens barrel body 11 is supported by the part protruding from the plane where the main body structure 21 is located.

[0033] In addition, the fixing portion 23 can also protrude from the plane where the main body structure 21 is located in the X-axis direction on both sides, so that the aperture assembly 20 is supported by the fixing portion 23 to have a gap G in the X-axis direction with the front lens barrel body 11 and the rear lens barrel body 31.

[0034] Of course, the gap G is not limited to being formed by the fixing portion 23 protruding from the plane where the main body structure 21 is located. In fact, the gap G in the direction of the main optical axis (X-axis) is determined by the fixing portion 23 of the aperture assembly 20 and the connecting portion of the front lens barrel body 11 or the connecting portion of the rear lens barrel body 31. That is, the fixing portion 23 can also not protrude from the plane where the main body structure 21 is located, but is formed by the protruding structure of the connecting portion between the front lens barrel body 11 and the fixing portion 23 (as shown in Figure 2 ), and the same applies to the rear lens barrel body 31. In an embodiment of the present application, as shown in Figure 2As shown, the front barrel body 11 is formed with a front connecting portion 12 that cooperates with the fixing portion 23. When the aperture assembly 20 is fixed to the front barrel body 11, the fixing portion 23 is clamped in the X-axis direction by the front connecting portion 12. The front connecting portion 12 can be a convex portion, a mounting surface or a groove. And / or, as Figure 8 As shown, a rear connecting portion 33 that cooperates with the fixing portion 23 is formed on the rear lens barrel 31, which is used to clamp the fixing portion 23 in the X-axis direction through the rear connecting portion 33 when the aperture assembly 20 is fixed to the rear lens barrel 31. The rear connecting portion 33 can be a convex portion, a mounting surface or a groove.

[0035] For example, Figure 2 As shown, during the fixed installation of the front lens barrel 11 and the aperture assembly 20, a front engaging portion 12 is formed on the front lens barrel 11 to cooperate with the fixing portion 23. This is used to clamp the fixing portion 23 in the X-axis direction via the front engaging portion 12 when the aperture assembly 20 is fixed to the front lens barrel 11. For example, the front engaging portion 12 may be formed with a protrusion on the inner wall of the front lens barrel 11. The protrusion abuts and secures the fixing portion 23, thereby naturally forming a gap G between the inner wall of the front lens barrel 11 and the main structure 21. Furthermore, the mounting surface or groove on the inner wall of the front lens barrel 11 may serve as the front engaging portion 12 to clamp the fixing portion 23 in the X-axis direction. The same principle and implementation are also employed, and will not be further described here.

[0036] Similarly, in the fixed installation of the aperture assembly 20 and the rear lens barrel 31, as shown in FIG. Figure 8 As shown, the rear barrel body 31 is formed with a rear engaging portion 33 that cooperates with the fixing portion 23. When the aperture assembly 20 is secured to the rear barrel body 31, the rear engaging portion 33 is used to clamp the fixing portion 23 in the X-axis direction. For example, the rear engaging portion 33 may be formed with a protrusion on the inner wall of the rear barrel body 31. The protrusion abuts against the fixing portion 23 to secure the fixing portion, thereby naturally forming a gap G between the inner wall of the rear barrel body 31 and the main structure 21. Alternatively, the mounting surface or groove on the inner wall of the rear barrel body 31 may serve as the rear engaging portion 33 to clamp the fixing portion 23 in the X-axis direction in a similar manner.

[0037] like Figure 2 As shown, the size of gap G is set between 0.1mm and 1mm, inclusive. As a precision optical structure, the lens module must meet precise parameter requirements during assembly and commissioning. If gap G is set too large, while ensuring space for the aperture assembly 20, it will increase the structural dimensions of the lens module and affect the dimensional accuracy of the lens module's optical design. If gap G is too small, it will be difficult to achieve the required installation accuracy for the aperture assembly 20. Therefore, gap G is set to a minimum of 0.1mm and a maximum of 1mm, or alternatively, a value between 0.1mm and 1mm.

[0038] The size of the gap G can be 0.1 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0039] In an embodiment of the present application, as shown in FIG. 1, the gap G between the main body structure 21 of the aperture assembly 20 and the front lens barrel body 11 and / or the rear lens barrel body 31 in the direction of the main optical axis is a first gap, and the gap G between the main body structure 21 of the aperture assembly 20 and the front lens barrel body 11 and / or the rear lens barrel body 31 in the radial direction, i.e., the YZ plane, is a second gap. Figure 2

[0040] The purpose of the first gap and the second gap is to improve the installation accuracy of the aperture assembly 20, improve the installation stability, and reduce the light loss and stray light in the optical system by reserving space. However, if the size of the first gap and the second gap is too large, it will inevitably lead to an increase in the size of the lens module, which is not conducive to the miniaturization design of the lens module, and the gap will also affect the optical performance of the lens module. If the size of the first gap and the second gap is too small, it may lead to interference and collision between other parts of the aperture assembly 20, including the main body structure 21, the movable aperture blades 22 thereon, and the driving structure, and the components on the front lens barrel body 11 or the rear lens barrel body 31, causing the optical elements inside the lens module to be tilted in the installation state, deformed, or even damaged. Therefore, the size of the first gap is selected to be between 0.1 mm and 1 mm, and the size of the second gap is selected to be between 0.1 mm and 1 mm. Further consideration is given to selecting the size of the first gap to be between 0.15 mm and 0.3 mm, and the size of the second gap to be between 0.15 mm and 0.3 mm. Within the interval of the size value range, the first gap and the second gap can make the lens module miniaturized as much as possible while ensuring the protection of the optical elements inside the lens module.

[0041] In an embodiment of the present application, the fixed part 23 is filled with an elastic adhesive body 40 to increase the fixing firmness of the aperture assembly 20 and the front lens barrel assembly 10 and the rear lens barrel assembly 30. In an embodiment of the present application, the first gap and / or the second gap is filled with an elastic adhesive body 40.

[0042] As shown in FIG. 1, the aperture assembly 20 is arranged in the front lens barrel assembly 10 and the rear lens barrel assembly 30. Figure 8 ​As shown, the gap G between the main body structure 21 of the aperture assembly 20 and the rear lens barrel body 31 in the X-axis direction is filled with an elastic adhesive body 40. The elastic adhesive body 40 can be a sealant, an elastic gasket, or the like. The elastic adhesive body 40 has elastic buffering capability and can buffer the structures on both sides of the elastic adhesive body 40. The elastic adhesive body 40 also has certain viscosity and can further improve the adhesion under the premise that the structures on both sides of the elastic adhesive body 40 are fixed by the structural relationship. For example, after the lens module is assembled and debugged, the shock absorption and energy absorption of the elastic adhesive body 40 can protect the main body structure 21 of the aperture assembly and reduce the inclination caused by the manufacturing error of the optical element.

[0043] As shown in the left part of FIG. 2, Figure 9 As shown in the left part of FIG. 2, Figure 9 The left part of FIG. 2 shows that the movable aperture blade 22 moves to a state in which the aperture diameter is reduced, Figure 9 The right part of FIG. 2 shows that the movable aperture blade 22 moves to a state in which the aperture is completely opened. In the state in which the movable aperture blade 22 moves to completely open the aperture, part of the main light path of the lens module in the embodiment of the present application is still blocked by the main body structure 21. If the range blocked by the main body structure 21 is too large, the light passing area is still small in the state in which the aperture is completely opened, that is, the light intensity adjustment capability of the aperture on the light path is poor. If the range blocked by the main body structure 21 is too small, the setting of the fixed part 23 is affected, and the stability of the bearing of the aperture assembly 20 by the fixed part 23 is also affected. Therefore, the proportion of the aperture diameter η in the state in which the movable aperture blade 22 is completely opened in the outer diameter φ of the aperture assembly 20 needs to be constrained.

[0044] In a feasible embodiment of the present application, as shown in the left part of FIG. 2, Figure 9 The aperture diameter η in the state in which the movable aperture blade 22 is completely opened is greater than or equal to 30% of the outer diameter φ of the aperture assembly 20. Further, the aperture diameter η in the state in which the movable aperture blade is completely opened can be limited to 35%-85% of the outer diameter φ of the aperture assembly, and the two end values can be taken. In this proportional relationship range, it can be ensured that the proportion of the main body structure 21 is small enough to reduce the overall size of the aperture assembly 20 in the YZ plane, and at the same time, the aperture adjustment capability and the mounting and bearing stability of the aperture assembly 20 are ensured.

[0045] In a feasible embodiment of the present application, as shown in the left part of FIG. 2, Figure 9 The radial width d of the fixed part 23 is constrained between 0.3 mm and 2 mm, and the two end values can be taken. Further, the radial width d of the fixed part is constrained between 0.5 mm and 1.2 mm, and the two end values can be taken.

[0046] The radial width d of the fixing portion 23 can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.05 mm, 1.1 mm, 1.15 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc.

[0047] As shown in Figure 9 Constraining the radial width d of the fixing portion 23 within the above numerical range can reduce the structural size of the aperture assembly 20 as much as possible while ensuring the stability of the installation of the aperture assembly 20 in the lens module, thereby assisting the miniaturization design of the lens module.

[0048] In an embodiment of the present application, the fixing portion 23 is concentric with the main body structure 21, the concentricity of the fixing portion 23 with the front lens barrel body 11 is less than or equal to 0.01 mm, and / or the concentricity of the fixing portion 23 with the rear lens barrel body 31 is less than or equal to 0.01 mm. Further, the concentricity of the fixing portion with the front lens barrel body is less than or equal to 0.005 mm, and / or the concentricity of the fixing portion with the rear lens barrel body is less than or equal to 0.005 mm.

[0049] The concentricity of the fixing portion 23 with the front lens barrel body 11 and / or the concentricity of the fixing portion 23 with the rear lens barrel body 31 can be 0.01 mm, 0.009 mm, 0.008 mm, 0.007 mm, 0.006 mm, 0.005 mm, 0.004 mm, 0.003 mm, 0.002 mm, 0.001 mm, etc.

[0050] In an ideal state of optical design, the centers of the optical elements of each part should coincide, i.e., the concentricity is 0, in the lens module connected in sequence along the main optical axis direction. However, some unavoidable process errors or assembly errors will inevitably cause the centers of the optical elements to be misaligned in a microscopic sense in the actual production and installation process. In the embodiment of the present application, it is necessary to ensure that the concentricity of the fixing portion 23 in the aperture assembly 20 is less than or equal to 0.01 mm when it is installed with the front lens barrel body 11, or further to make the concentricity less than or equal to 0.005 mm. The concentricity of the fixing portion 23 in the aperture assembly 20 is less than or equal to 0.01 mm when it is installed with the rear lens barrel body 31, or further to make the concentricity less than or equal to 0.005 mm. Thus, the installation eccentricity problem of the aperture assembly 20 installed in the lens module is effectively improved.

[0051] As shown in Figure 11 The movable aperture blade 22 is a diaphragm structure in the lens module, and if theFigure 11 As shown in the right figure, the distance between the lens and the last optical lens in the front lens barrel assembly 10 is large, which may cause stray light in the transmitted light beam (such as Figure 11 In the right figure, the red arrow indicates that the distance between the last optical lens in the current barrel assembly 10 is large, and the incident light will be blocked to a certain extent, resulting in a decrease in the amount of light entering the lens module. Figure 11 As shown in the left figure, the distance between the movable aperture blade 22 and the last optical lens in the front lens barrel assembly 10 needs to be designed to ensure that the light beam can pass normally when the aperture is open and to minimize the generation of stray light. Therefore, the fixed distance between the aperture assembly 20 and the front lens barrel assembly 10, or also between the aperture assembly 20 and the rear lens barrel assembly 30, also needs to be set accordingly in conjunction with the optical path design, including but not limited to controlling the distance between the aperture assembly 20 and the front and rear optical lenses to be not too large, and controlling the flatness of the movable aperture blade 22 to meet a certain accuracy range to avoid the generation of stray light due to tilt.

[0052] For example, Figure 2 As shown, the size of the gap G is controlled and adjusted, including the first gap in the direction of the principal optical axis and the second gap in the YZ plane. By controlling the first gap and the second gap within a smaller value range, the distance between the aperture assembly 20 and the front lens barrel assembly 10, and the distance between the aperture assembly 20 and the rear lens barrel assembly 30 can be reduced, thereby achieving the goal of avoiding stray light and increasing the amount of light entering. The adjustment method of the first gap and the second gap, as well as the size requirements of the first gap and the second gap, have been described in detail in the aforementioned specification and will not be repeated here.

[0053] In a feasible embodiment of the present application, the flatness of the surface on which the fixing portion 23 and the front lens barrel 11 are fitted together is less than or equal to 0.01mm, and the flatness of the surface on which the front lens barrel 11 and the fixing portion 23 are fitted together is less than or equal to 0.01mm; and / or, the flatness of the surface on which the fixing portion 23 and the rear lens barrel 31 are fitted together is less than or equal to 0.01mm, and the flatness of the surface on which the rear lens barrel 31 and the fixing portion 23 are fitted together is less than or equal to 0.01mm. Preferably, the flatness of the surface on which the fixing portion 23 and the front lens barrel 11 are fitted together is less than or equal to 0.005mm, and the flatness of the surface on which the front lens barrel 11 and the fixing portion 23 are fitted together is less than or equal to 0.005mm; and / or, the flatness of the surface on which the fixing portion 23 and the rear lens barrel 31 are fitted together is less than or equal to 0.005mm, and the flatness of the surface on which the rear lens barrel 31 and the fixing portion 23 are fitted together is less than or equal to 0.005mm.

[0054] The flatness value can be 0.01mm, 0.009mm, 0.008mm, 0.007mm, 0.006mm, 0.005mm, 0.004mm, 0.003mm, 0.002mm, 0.001mm, etc.

[0055] like Figure 12 As shown, Figure 12 The thick solid line in the figure is the surface of the fixing portion 23, and the dotted line represents the reference plane of the horizontal plane, wherein the surface height difference between the surface of the fixing portion 23 and the horizontal reference plane is Figure 12 The distance shown by the double arrows in the figure represents the flatness of the surface of the fixing portion 23. For example, the flatness of the surface on which the fixing portion 23 and the front lens barrel 11 are fitted together represents the flatness of the side surface on which the fixing portion 23 and the front lens barrel 11 are fitted together.

[0056] By controlling the flatness of the fixed mounting surface between the fixing portion 23 and other structures, the problem of the aperture assembly being tilted during installation in the lens module can be effectively improved.

[0057] In a feasible implementation of the present application, Figure 1 As shown, a front extension tube is formed on one side of the front barrel body 11 facing the rear barrel body 31 , and the rear barrel body 31 extends into the inner cavity of the front extension tube and is fixed therein, so as to fix the aperture assembly 20 to the inner cavity of the front extension tube through the fixing portion 23 .

[0058] like Figure 1 As shown, when the lens module is installed using the structural form of the embodiment of the present application, the optical lens in the rear lens barrel assembly 30 is first assembled in the inner cavity of the rear lens barrel body 31, and the aperture assembly 20 is loaded into the front lens barrel assembly 10, and the front lens barrel assembly 10 is used to support and fix the aperture assembly 20 on the front side, and finally the assembled rear lens barrel assembly 30 is loaded to complete the assembly of the lens module. Specifically, the aperture assembly 20 is first placed in the front lens barrel body 11, and the inner hole of the fixing portion 23 in the aperture assembly 20 is limited and supported by the plane by the inner side wall W1 of the front lens barrel body and the front connecting portion 12 to achieve the fixation between the two. The rear lens barrel assembly 30 after the optical lens is assembled is loaded into the front lens barrel body 11, and is tightened with a pressure ring. Moreover, the rear lens barrel body 31 is also fixed to the front lens barrel body 11 by screwing or bonding.

[0059] A gap G is left between the main structure 21 of the aperture assembly 20 and the rear lens barrel 31 and the front lens barrel 11, and the fixed bearing pressure is applied to the fixed part 23 of the aperture assembly 20. The setting of the gap G prevents the main structure 21 of the aperture assembly 20 from being subjected to bearing pressure and will not be deformed or damaged due to pressure, thereby improving the reliability of the lens module.

[0060] In another feasible embodiment of the present application, asFigure 10 As shown, a rear extension tube is formed on one side of the rear barrel body 31 facing the front barrel body 11 , and the front barrel body 11 extends into the inner cavity of the rear extension tube and is fixed therein, so as to fix the aperture assembly 20 to the inner cavity of the rear extension tube through the fixing portion 23 .

[0061] like Figure 10 As shown, when the lens module is installed using the structural form of the embodiment of the present application, the optical lens in the front barrel assembly 10 is first assembled in the inner cavity of the front barrel body 11, and the aperture assembly 20 is loaded into the rear barrel assembly 30, and the aperture assembly 20 is supported and fixed on the rear side by the rear barrel assembly 30, and finally the assembled front barrel assembly 10 is loaded to complete the assembly of the lens module. Specifically, the aperture assembly 20 is first placed in the rear barrel body 31, and the inner hole of the fixing portion 23 in the aperture assembly 20 is limited and supported by the plane by the rear barrel body inner wall W2 and the rear connecting portion 33 to achieve the fixation between the two. The front barrel assembly 10 after the optical lens is assembled is loaded into the rear barrel body 31, and the pressure ring is used to tighten the fit, and the front barrel body 11 is also fixed to the rear barrel body 31 by screwing or bonding.

[0062] A gap G is left between the main structure 21 of the aperture assembly 20 and at least one of the rear lens barrel 31 and the front lens barrel 11, and the fixed bearing pressure is applied to the fixed part 23 of the aperture assembly 20. The setting of the gap G prevents the main structure 21 of the aperture assembly 20 from bearing pressure and will not be deformed or damaged due to pressure, thereby improving the reliability of the lens module.

[0063] In a feasible implementation of the present application, Figure 10 As shown, a through cable groove 32 is opened inside the rear lens barrel 31 along the main optical axis direction, and the FPC soft cable 24 in the aperture assembly 20 is led out to the external device through the cable groove 32.

[0064] like Figure 10 As shown, the structure of the rear lens barrel 31 is utilized to provide a cable groove 32. The FPC cable 24 in the aperture assembly 20 can be directly led out through the through-cable groove 32, thereby directly connecting to external devices at the rear of the rear lens barrel 31. By fully utilizing the existing structural space of the lens module and implementing a clever design, the lens module's size can be reduced while ensuring the stability of the lens module's electrical signal transmission.

[0065] In a feasible embodiment of the present application, the thermal expansion coefficient of the fixing part 23 is more than 80% of the thermal expansion coefficient of the front lens barrel body 11 or the rear lens barrel body 31, or the difference between the thermal expansion coefficient of the fixing part 23 and the thermal expansion coefficient of the front lens barrel body 11 or the rear lens barrel body 31 is less than or equal to 5*10^(-6) / ℃.

[0066] In view of the application of the lens module in the vehicle-mounted lens in the embodiments of the present application, for the lens use in the outdoor vehicle driving, it is often difficult to avoid the high temperature or low temperature harsh environment. If the thermal expansion coefficients of the fixed part 23 and the front lens barrel body 11 or the rear lens barrel body 31 are too different, in the case of special high or low temperature or large temperature change, the difference in the deformation between the two is large, which is easy to cause the internal stress to be too large, and damage the structural precision of the lens module. Therefore, when the material of the fixed part 23 is selected, the thermal expansion coefficient of the fixed part 23 is selected to be more than 80% of the thermal expansion coefficient of the front lens barrel body 11 or the rear lens barrel body 31, or, under the premise that the material of the front lens barrel body 11 or the rear lens barrel body 31 is determined, a material with a thermal expansion coefficient less than or equal to 5*10^(-6) / ℃ is selected as the material of the fixed part 23 for processing and manufacturing.

[0067] The thermal expansion coefficient of the fixed part 23 can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, etc. of the thermal expansion coefficient of the front lens barrel body 11 or the rear lens barrel body 31.

[0068] Or the difference between the thermal expansion coefficient of the fixed part 23 and the thermal expansion coefficient of the front lens barrel body 11 or the rear lens barrel body 31 is 5*10^(-6) / ℃, 4.5*10^(-6) / ℃, 4*10^(-6) / ℃, 3.5*10^(-6) / ℃, 3*10^(-6) / ℃, 2.5*10^(-6) / ℃, 2*10^(-6) / ℃, 1.5*10^(-6) / ℃, 1*10^(-6) / ℃, 8*10^(-7) / ℃, 6*10^(-7) / ℃, 4*10^(-7) / ℃, etc.

[0069] In a feasible implementation of the present application, the yield strength of the material of the fixed part 23 is greater than or equal to 150 MPa. Further, the yield strength of the material of the fixed part 23 is between 150 MPa and 300 MPa.

[0070] The yield strength of the material of the fixed part 23 can be 150 MPa, 160 MPa, 170 MPa, 180 MPa, 190 MPa, 200 MPa, 210 MPa, 220 MPa, 230 MPa, 240 MPa, 250 MPa, 260 MPa, 270 MPa, 280 MPa, 290 MPa, 300 MPa, 350 MPa, 400 MPa, 450 MPa, 500 MPa, 550 MPa, 600 MPa, 650 MPa, 700 MPa, 750 MPa, 800 MPa, etc.

[0071] In the material selection of the fixing portion 23, the material yield strength is also considered. The material with a yield strength greater than or equal to 150 MPa, or further, the material with a yield strength between 150 MPa and 300 MPa is selected to prepare the fixing portion 23, which can effectively improve the fatigue strength and mechanical strength of the fixing portion 23 in the lens module, improve the working stability and service life of the lens module, and is not easy to deform in the use process after the lens module is installed, thereby effectively avoiding the problems of eccentricity, inclination or damage of the aperture assembly 20 in the lens module.

[0072] In another aspect of the embodiments of the present application, an electronic device is provided, which includes the lens module of any one of the preceding embodiments and a photosensitive chip.

[0073] The embodiments of the present application also provide an electronic device, which can be a vehicle. The lens assembly is used to provide shooting images, distance measurement, obstacle detection and other auxiliary work during the driving of the vehicle. The lens module of the embodiments of the present application is miniaturized, and is fixed by the fixing portion 23 in the aperture assembly 20 and the barrel structure of the lens. The gap G ensures that the main body portion in the aperture assembly 20 will not be subjected to pressure during the fixing, which can effectively improve the accuracy and stability of the lens module installation and fixing, and can be fixed stably in an adverse external environment with large external force impact or large external temperature change, and ensure the working accuracy of the lens module. The variable aperture form used in the lens module can adjust the aperture size according to the intensity of external light to compensate for the imaging quality and improve the imaging quality of the vehicle-mounted lens.

[0074] The electronic device can also be a robot, a drone, a security monitoring system, a laser radar, a vehicle headlight, a vehicle camera, etc. The embodiments of the present application do not make specific limitations. The electronic device uses the lens module of the embodiments of the present application, which can achieve better lens assembly accuracy and aperture adjustment accuracy, and improve the optical stability of the electronic device.

[0075] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A lens module, characterized in that: The invention comprises a front lens barrel assembly, an aperture assembly and a rear lens barrel assembly which are sequentially connected along the main optical axis, wherein the front lens barrel assembly comprises a front lens barrel body and an optical lens arranged in the inner cavity of the front lens barrel body, the rear lens barrel assembly comprises a rear lens barrel body and an optical lens arranged in the inner cavity of the rear lens barrel body, and the aperture assembly comprises a main structure; a fixing portion extends outward from the edge of the main structure, and the aperture assembly is axially pressed and fixed by the front lens barrel body and the rear lens barrel body through the fixing portion, and a gap is provided between the main structure of the aperture assembly and at least one of the front lens barrel body and the rear lens barrel body.

2. The lens module according to claim 1, wherein: The fixing portion is an annular boss fixedly arranged around the outer edge of the main structure and the main structure, or the fixing portion is a plurality of protrusions distributed around the outer edge of the main structure.

3. The lens module according to claim 1, wherein: The fixing portion is fitted with the inner wall of the front lens barrel body, and the aperture assembly is radially fixed between the fixing portion and the front lens barrel body; or, the fixing portion is fitted with the inner wall of the rear lens barrel body, and the aperture assembly is radially fixed between the fixing portion and the rear lens barrel body.

4. The lens module according to claim 1, wherein: The aperture assembly further includes a plurality of movable aperture blades arranged in the main structure and a driving structure respectively connected to the movable aperture blades, and the movable aperture blades are driven by the driving structure to realize the opening and closing of the aperture.

5. The lens module according to claim 1, wherein: The size of the gap is between 0.1 mm and 1 mm, inclusive.

6. The lens module according to any one of claims 1 to 5, characterized in that: The front lens barrel is provided with a front connecting portion that cooperates with the fixing portion, and is used for radially clamping the fixing portion through the front connecting portion when the aperture assembly is fixed to the front lens barrel, and the front connecting portion includes a convex portion, a mounting surface or a groove; and / or, the rear lens barrel is provided with a rear connecting portion that cooperates with the fixing portion, and is used for radially clamping the fixing portion through the rear connecting portion when the aperture assembly is fixed to the rear lens barrel, and the rear connecting portion includes a convex portion, a mounting surface or a groove.

7. The lens module according to any one of claims 1 to 5, characterized in that: There is a first gap between the main structure of the aperture assembly and the front lens barrel and / or the rear lens barrel in the direction of the main optical axis, and a second gap between the main structure of the aperture assembly and the front lens barrel and / or the rear lens barrel in the radial direction.

8. The lens module according to claim 7, wherein: The size of the first gap is between 0.1 mm and 1 mm and includes both end point values, and the size of the second gap is between 0.1 mm and 1 mm and includes both end point values.

9. The lens module according to claim 8, wherein: The size of the first gap is between 0.15 mm and 0.3 mm and includes both end point values, and the size of the second gap is between 0.15 mm and 0.3 mm and includes both end point values.

10. The lens module according to claim 7, wherein: The lens module meets at least one of the following conditions: Filling an elastic adhesive between the fixing portion and the front lens barrel; Filling an elastic adhesive between the fixing portion and the rear lens barrel; Filling the first gap with an elastic adhesive; The second gap is filled with an elastic adhesive.

11. The lens module according to claim 4, wherein: The aperture diameter of the movable aperture blades in the fully opened state is greater than or equal to 30% of the outer diameter of the aperture assembly.

12. The lens module according to claim 11, wherein: The aperture diameter of the movable aperture blades in the fully opened state is between 35% and 85% of the outer diameter of the main structure, including both end points.

13. The lens module according to any one of claims 1 to 5, characterized in that: The radial width of the fixing portion is between 0.3 mm and 2 mm, inclusive.

14. The lens module according to claim 13, wherein: The radial width of the fixing portion is between 0.5 mm and 1.2 mm, inclusive.

15. The lens module according to any one of claims 1 to 5, characterized in that: The fixing portion is concentric with the main structure, the concentricity of the fixing portion and the front lens barrel is less than or equal to 0.01 mm, and / or the concentricity of the fixing portion and the rear lens barrel is less than or equal to 0.01 mm.

16. The lens module according to claim 15, wherein: The concentricity between the fixing portion and the front lens barrel is less than or equal to 0.005 mm, and / or the concentricity between the fixing portion and the rear lens barrel is less than or equal to 0.005 mm.

17. The lens module according to any one of claims 1 to 5, characterized in that: The flatness of the surface on which the fixing portion and the front lens barrel are fitted together is less than or equal to 0.01 mm, and the flatness of the surface on which the front lens barrel is fitted together with the fixing portion is less than or equal to 0.01 mm; and / or the flatness of the surface on which the fixing portion and the rear lens barrel are fitted together is less than or equal to 0.01 mm, and the flatness of the surface on which the rear lens barrel is fitted together with the fixing portion is less than or equal to 0.01 mm.

18. The lens module according to claim 17, wherein: The flatness of the surface on which the fixing portion and the front lens barrel are fitted together is less than or equal to 0.005 mm, and the flatness of the surface on which the front lens barrel is fitted together with the fixing portion is less than or equal to 0.005 mm; and / or the flatness of the surface on which the fixing portion and the rear lens barrel are fitted together is less than or equal to 0.005 mm, and the flatness of the surface on which the rear lens barrel is fitted together with the fixing portion is less than or equal to 0.005 mm.

19. The lens module according to any one of claims 1 to 5, characterized in that: A front extension tube is formed on one side of the front lens barrel body facing the rear lens barrel body, and the rear lens barrel body extends into the inner cavity of the front extension tube and is fixed therein, so that the aperture assembly is fixedly arranged in the inner cavity of the front extension tube through the fixing portion.

20. The lens module according to any one of claims 1 to 5, characterized in that: A rear extension tube is formed on one side of the rear lens barrel body facing the front lens barrel body, and the front lens barrel body extends into the inner cavity of the rear extension tube and is fixed therein, so that the aperture assembly is fixedly arranged in the inner cavity of the rear extension tube through the fixing portion.

21. The lens module according to any one of claims 1 to 5, characterized in that: A through cable groove is provided inside the rear lens barrel along the main optical axis, and the FPC cable in the aperture assembly is led out to the external device through the cable groove.

22. The lens module according to any one of claims 1 to 5, characterized in that: The thermal expansion coefficient of the fixing part is more than 80% of the thermal expansion coefficient of the front lens barrel body or the rear lens barrel body, or the difference between the thermal expansion coefficient of the fixing part and the thermal expansion coefficient of the front lens barrel body or the rear lens barrel body is less than or equal to 5*10^(-6) / ℃.

23. The lens module according to any one of claims 1 to 5, characterized in that: The material yield strength of the fixing portion is greater than or equal to 150 MPa.

24. The lens module according to claim 23, wherein: The material yield strength of the fixing portion is between 150 MPa and 300 MPa.

25. An electronic device, characterized in that: It comprises the lens module as described in any one of claims 1-24, and a photosensitive chip.

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