Camera module

Abstract

The utility model provides a camera module. The camera module comprises a first plastic lens cone, a second plastic lens cone, an optical element and an external module structure, the first plastic lens cone and the second plastic lens cone are coaxially arranged, the optical element is at least accommodated in the first plastic lens cone, the external module structure is connected with the outer wall surface of the second plastic lens cone, the second plastic lens cone sleeves the outer side of the first plastic lens cone, and the external module structure is connected with the outer wall surface of the second plastic lens cone. The first plastic lens barrel is sequentially composed of a front end part, a middle part and a tail end part from the first side to the second side along the optical axis, and the outer wall surface of at least one of the front end part, the middle part and the tail end part is covered with the second plastic lens barrel in a shape following manner; or, the first plastic lens cone is located on the first side of the second plastic lens cone, and the end face of the second side of the first plastic lens cone is connected with the end face of the first side of the second plastic lens cone. According to the utility model, the problems that the lens cone of the camera module in the prior art is low in strength and easy to deform due to stress are solved.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging equipment technology, and more specifically, to a camera module. Background Technology

[0002] Currently, the trend towards thinner and lighter designs for cameras in portable electronic devices has not only improved portability and feel but also spurred innovation in camera technology. However, as the thickness of the camera module decreases, the space within its internal structure is compressed, leading to a corresponding reduction in the structural space for each component. This poses a challenge to the strength of these components. In particular, the lens barrel, as a key component of the camera module, faces a significant strength challenge.

[0003] In existing camera modules, there is a material difference between the lens barrel and the VCM (Voice Coil Motor). The VCM motor is usually made of metal, while the lens barrel is mostly made of plastic. Metal, due to its high rigidity and strength, can better resist the assembly stress generated during the camera module manufacturing process, maintaining structural stability. Conversely, plastic lens barrels, due to their lower strength, have relatively weaker resistance to stress deformation and are more susceptible to stress during manufacturing, leading to lens barrel deformation. This deformation not only affects optical performance but can also cause camera module assembly failure, thus significantly reducing the production yield of the camera module.

[0004] In other words, the lens barrel of the existing camera module has the problem of low strength and easy deformation under stress. Utility Model Content

[0005] The main objective of this invention is to provide a camera module to solve the problems of low strength and easy deformation of the lens barrel in existing camera modules.

[0006] To achieve the above objectives, this utility model provides a camera module, including a first plastic lens barrel, a second plastic lens barrel, an optical element, and an external module structure. The first plastic lens barrel and the second plastic lens barrel are coaxially arranged, and at least the optical element is housed in the first plastic lens barrel. The external module structure is connected to the outer wall surface of the second plastic lens barrel. The second plastic lens barrel is sleeved on the outside of the first plastic lens barrel. The first plastic lens barrel is composed of a front end, a middle part, and a tail end in sequence from the first side to the second side along the optical axis. The outer wall surface of at least one of the front end, the middle part, and the tail end is covered by the second plastic lens barrel. Alternatively, the first plastic lens barrel is located on the first side of the second plastic lens barrel, and the end face of the second side of the first plastic lens barrel is connected to the end face of the first side of the second plastic lens barrel.

[0007] Furthermore, the axial length b of the second plastic lens barrel and the maximum radial thickness h of the second plastic lens barrel satisfy the following condition: 4.70≤b / h≤42.80.

[0008] Furthermore, when the first plastic lens barrel is located on the first side of the second plastic lens barrel and the end face of the second side of the first plastic lens barrel is connected to the end face of the first side of the second plastic lens barrel, the axial length b of the second plastic lens barrel and the maximum radial thickness h of the second plastic lens barrel satisfy the following condition: 4.70≤b / h≤8.80.

[0009] Furthermore, when the second plastic lens barrel is fitted over the outside of the first plastic lens barrel, the maximum radial thickness of the second plastic lens barrel is less than the maximum radial thickness of the first plastic lens barrel.

[0010] Furthermore, the axial length b of the second plastic lens barrel is greater than or equal to 2.25 mm and less than or equal to 7.30 mm; the maximum radial thickness h of the second plastic lens barrel is greater than or equal to 0.15 mm and less than or equal to 0.55 mm.

[0011] Furthermore, when the second plastic lens tube is fitted over the outside of the first plastic lens tube, the outer walls of the front end, the middle part, and the rear end are all covered with the second plastic lens tube in a conformal manner; or, only the front end is covered with the second plastic lens tube in a conformal manner; or, only the rear end is covered with the second plastic lens tube in a conformal manner; or, only the outer walls of the front end and the rear end are covered with the second plastic lens tube in a conformal manner.

[0012] Furthermore, when at least two of the front end, middle part and tail end are covered with a second plastic lens barrel, the second plastic lens barrel is divided into a first part and a second part. The external module structure includes a first external module structure and a second external module structure. The outer wall of the first part is connected to the first external module structure, and the outer wall of the second part is connected to the second external module structure.

[0013] Furthermore, the elastic modulus of the second plastic lens barrel is greater than that of the first plastic lens barrel, wherein the elastic modulus of the first plastic lens barrel is greater than or equal to 2000 MPa and less than or equal to 3500 MPa; and / or, the elastic modulus of the second plastic lens barrel is greater than or equal to 4000 MPa and less than or equal to 8000 MPa.

[0014] Furthermore, the optical element includes multiple lenses and at least one support member. When the second plastic lens barrel is sleeved on the outside of the first plastic lens barrel, the multiple lenses and the support member are housed in the first plastic lens barrel, and at least some of the outer peripheral surfaces of the lenses are in contact with the inner wall surface of the first plastic lens barrel. When the first plastic lens barrel is located on the first side of the second plastic lens barrel and the end face of the second side of the first plastic lens barrel is connected to the end face of the first side of the second plastic lens barrel, the multiple lenses and the support member are housed in the first plastic lens barrel and the second plastic lens barrel.

[0015] Furthermore, the first plastic lens barrel and the second plastic lens barrel are bonded together by an adhesive structure.

[0016] By applying the technical solution of this utility model, the external module structure is connected to the outer wall of the second plastic lens barrel. The second plastic lens barrel is sleeved on the outside of the first plastic lens barrel. The first plastic lens barrel is composed of a front end, a middle part, and a tail end in sequence from the first side to the second side along the optical axis. The second plastic lens barrel is conformally covered on the outer wall of at least one of the front end, the middle part, and the tail end. By adding the second plastic lens barrel and connecting it to the external module structure, the structural strength of the first plastic lens barrel housing the optical elements can be significantly improved, and the structural strength and stability of the entire camera module can be significantly improved. The second plastic lens barrel can resist the deformation forces that may be encountered during the module manufacturing process, reducing or avoiding lens barrel deformation, which is crucial for maintaining the focusing accuracy and optical performance of the camera module. Since the first plastic lens barrel can be partially (e.g., the front end, the middle part, or the tail end) or entirely covered by the second plastic lens barrel, this design provides multiple implementation methods, which not only increases the design freedom but also reduces production costs and improves product design quality and manufacturing efficiency. The direct connection between the second plastic lens barrel and the external module can disperse the stress generated during the assembly process and prevent it from being directly transmitted to the first plastic lens barrel, thereby reducing lens barrel deformation caused by assembly stress.

[0017] Alternatively, the first plastic lens barrel is located on the first side of the second plastic lens barrel, and the end face of the second side of the first plastic lens barrel is connected to the end face of the first side of the second plastic lens barrel. This arrangement enhances the strength of the connection between the two plastic lens barrels, improving the overall structural stability and resistance to external deformation. It also facilitates precise positioning between the first and second plastic lens barrels, which is crucial for the alignment of optical components such as lenses. Direct contact and connection of the end faces reduces optical performance degradation caused by assembly errors, ensuring the imaging quality of the camera module. Attached Figure Description

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

[0019] Figure 1 A schematic diagram of the camera module according to Embodiment 1 of this utility model is shown;

[0020] Figure 2 It shows Figure 1 A schematic diagram of another state of the camera module in the image;

[0021] Figure 3 It shows Figure 1 A schematic diagram of another state of the camera module in the image;

[0022] Figure 4 It shows Figure 1 A schematic diagram of another state of the camera module in the image;

[0023] Figure 5 A schematic diagram of the camera module according to Embodiment 2 of this utility model is shown;

[0024] Figure 6 It shows Figure 5 A schematic diagram of another state of the camera module in the image;

[0025] Figure 7 A schematic diagram of the camera module according to Embodiment 3 of this utility model is shown;

[0026] Figure 8 It shows Figure 7 A schematic diagram of another state of the camera module in the image;

[0027] Figure 9 A schematic diagram of the camera module according to Embodiment 4 of this utility model is shown;

[0028] Figure 10 It shows Figure 9 A schematic diagram of another state of the camera module in the image;

[0029] Figure 11 A schematic diagram of the camera module according to Embodiment 5 of this utility model is shown;

[0030] Figure 12 It shows Figure 11 A structural diagram of another state of the camera module.

[0031] The above figures include the following reference numerals:

[0032] 10. First plastic lens barrel; 11. Front end; 12. Middle part; 13. Tail end; 20. Second plastic lens barrel; 21. First part; 22. Second part; 30. External module structure; 31. First external module structure; 32. Second external module structure; 40. Optical element; 50. Optical axis; 60. Adhesive structure. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0035] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0036] In order to solve the problems of low strength and easy deformation of the lens barrel of the existing camera module, this utility model provides a camera module.

[0037] like Figures 1 to 12 As shown, the camera module includes a first plastic lens barrel 10, a second plastic lens barrel 20, an optical element 40, and an external module structure 30. The first plastic lens barrel 10 and the second plastic lens barrel 20 are coaxially arranged. At least the optical element 40 is housed in the first plastic lens barrel 10. The external module structure 30 is connected to the outer wall of the second plastic lens barrel 20. The second plastic lens barrel 20 is sleeved on the outside of the first plastic lens barrel 10. The first plastic lens barrel 10 is composed of a front end portion 11, a middle portion 12, and a tail end portion 13 in sequence from the first side to the second side along the optical axis 50. The outer wall of at least one of the front end portion 11, the middle portion 12, and the tail end portion 13 is covered by the second plastic lens barrel 20. Alternatively, the first plastic lens barrel 10 is located on the first side of the second plastic lens barrel 20, and the end face of the second side of the first plastic lens barrel 10 is connected to the end face of the first side of the second plastic lens barrel 20.

[0038] The external module structure 30 is connected to the outer wall of the second plastic lens barrel 20. The second plastic lens barrel 20 is sleeved on the outside of the first plastic lens barrel 10. The first plastic lens barrel 10 is composed of a front end portion 11, a middle portion 12, and a tail end portion 13 sequentially from the first side to the second side along the optical axis 50. The second plastic lens barrel 20 is conformally covered on the outer wall of at least one of the front end portion 11, the middle portion 12, and the tail end portion 13. By adding the second plastic lens barrel 20 and connecting it to the external module structure 30, the structural strength of the first plastic lens barrel 10 that houses the optical element 40 can be significantly improved, and the structural strength and stability of the entire camera module can be significantly improved. The second plastic lens barrel 20 can resist the deformation forces that may be encountered during the module manufacturing process, reducing or avoiding lens barrel deformation, which is crucial for maintaining the focusing accuracy and optical performance of the camera module. Since the first plastic lens barrel 10 can be partially (e.g., the front end 11, the middle part 12, or the rear end 13) or entirely covered by the second plastic lens barrel 20, this design offers multiple implementation options. This not only increases design freedom but also reduces production costs and improves product design quality and manufacturing efficiency. The direct connection between the second plastic lens barrel 20 and the external module can disperse the stress generated during assembly, preventing it from being directly transmitted to the first plastic lens barrel 10, thereby reducing lens barrel deformation caused by assembly stress.

[0039] Alternatively, the first plastic lens barrel 10 is located on the first side of the second plastic lens barrel 20, and the end face of the second side of the first plastic lens barrel 10 is connected to the end face of the first side of the second plastic lens barrel 20. This arrangement enhances the strength of the connection between the two plastic lens barrels, which is beneficial to improving the overall structural stability and resistance to external deformation. It also helps to achieve precise positioning between the first plastic lens barrel 10 and the second plastic lens barrel 20, which is particularly crucial for the alignment of optical elements 40 such as lenses. Direct contact and connection of the end faces reduces the degradation of optical performance caused by assembly errors, ensuring the imaging quality of the camera module.

[0040] It should be noted that the aforementioned first side and second side refer to two opposite sides of the first plastic lens barrel 10 or the second plastic lens barrel 20. Specifically, they can be the object side and image side of the first plastic lens barrel 10 or the second plastic lens barrel 20, or the image side and object side, depending on the actual situation. (Reference) Figure 1 As shown, the first side can be the upper side in the figure, and the second side can be the lower side in the figure.

[0041] Specifically, the axial length b of the second plastic lens barrel 20 and its maximum radial thickness h satisfy the following ratio: 4.70 ≤ b / h ≤ 42.80. By constraining this ratio range, the structural balance of the second plastic lens barrel 20 can be ensured. A suitable ratio helps to find the optimal balance between structural strength, dimensional accuracy, and thinness. By controlling the b / h ratio, accurate lens positioning can be ensured, reducing optical performance degradation caused by lens barrel deformation, thereby improving the overall optical quality and imaging effect of the camera module. The second plastic lens barrel 20 is directly connected to the external module structure 30 and bears external stress. By optimizing the b / h ratio, it can be ensured that the second plastic lens barrel 20 has sufficient thickness to disperse and resist external stress, avoiding lens barrel deformation caused by stress concentration and maintaining the stability of the camera module during assembly and use.

[0042] In an optional embodiment of this application, when the second plastic lens barrel 20 is fitted over the outside of the first plastic lens barrel 10, the maximum radial thickness of the second plastic lens barrel 20 is less than the maximum radial thickness of the first plastic lens barrel 10. Furthermore, the axial length b of the second plastic lens barrel 20 is greater than or equal to 2.25 mm and less than or equal to 7.30 mm; the maximum radial thickness h of the second plastic lens barrel 20 is greater than or equal to 0.15 mm and less than or equal to 0.55 mm. This arrangement allows for a slimmer and lighter camera module design while maintaining structural strength. This design satisfies the need for a slimmer camera module in portable electronic devices while ensuring sufficient structural strength to withstand stress during module manufacturing. The first plastic lens barrel 10 has a thicker radial thickness, which better ensures the positioning accuracy and stability of the internal optical elements 40, thereby improving optical performance and image quality. Appropriate thickness can reduce the degradation of optical performance caused by internal structural deformation. The second plastic lens barrel 20 is made of high-strength plastic, which is typically expensive. By limiting its maximum radial thickness h, the amount of high-strength material used can be reduced, thereby lowering production costs.

[0043] Specifically, the elastic modulus of the second plastic lens barrel 20 is greater than that of the first plastic lens barrel 10. The elastic modulus of the first plastic lens barrel 10 is greater than or equal to 2000 MPa and less than or equal to 3500 MPa; the elastic modulus of the second plastic lens barrel 20 is greater than or equal to 4000 MPa and less than or equal to 8000 MPa. This arrangement allows the second plastic lens barrel 20 to use a high-strength material, while the first plastic lens barrel 10 uses a low-strength material, aiming to achieve a dual optimization of structural strength and optical precision. High-strength materials can effectively resist external forces, reduce deformation during module manufacturing, and improve structural stability; low-strength materials, due to their lower elastic modulus, are easier to control in terms of mechanical dimensions, ensuring the precision of the optical element 40 assembly and improving image quality. This material selection and layered design strategy not only enhances the stress resistance of the camera module but also improves design flexibility, making it a key technology for achieving high-performance, low-cost, and thin camera modules.

[0044] In another optional embodiment of this application, when the first plastic lens barrel 10 is located on the first side of the second plastic lens barrel 20 and the end face of the second side of the first plastic lens barrel 10 is connected to the end face of the first side of the second plastic lens barrel 20, the axial length b of the second plastic lens barrel 20 and the maximum radial thickness h of the second plastic lens barrel 20 satisfy the following: 4.70≤b / h≤8.80. This arrangement ensures that the first plastic lens barrel 10 and the second plastic lens barrel 20 are not connected in a nested manner, but are designed in segments so that the first plastic lens barrel 10 and the second plastic lens barrel 20 are connected sequentially along the optical axis 50, thus maintaining the deformation resistance of the whole composed of the two plastic lens barrels.

[0045] Specifically, when the first plastic lens barrel 10 is located on the first side of the second plastic lens barrel 20 and the end face of the second side of the first plastic lens barrel 10 is connected to the end face of the first side of the second plastic lens barrel 20, the axial length b of the second plastic lens barrel 20 is greater than or equal to 2.25 mm and less than or equal to 7.30 mm; the maximum radial thickness h of the second plastic lens barrel 20 is greater than or equal to 0.15 mm and less than or equal to 0.55 mm.

[0046] Furthermore, the optical element 40 includes multiple lenses and at least one support member. When the second plastic lens barrel 20 is fitted outside the first plastic lens barrel 10, the multiple lenses and the support member are housed within the first plastic lens barrel 10, and at least a portion of the outer peripheral surfaces of the lenses are in contact with the inner wall surface of the first plastic lens barrel 10. When the first plastic lens barrel 10 is located on the first side of the second plastic lens barrel 20 and the end face of the second side of the first plastic lens barrel 10 is connected to the end face of the first side of the second plastic lens barrel 20, a portion of the multiple lenses and the support member are housed within the first plastic lens barrel 10, and another portion is housed within the second plastic lens barrel 20. The support member includes one of a light-blocking paper, a spacer, and a spacer ring. The support member can be disposed between two adjacent lenses to achieve stable lens assembly. The support member can also be a pressure ring that abuts against the end lens among the multiple lenses, and can be configured according to actual conditions. Since the key point of this application is not in the specific structure of the optical element 40, the number of lenses, the specific optical parameters of the lenses, and the type and number of the support components are not limited, and can be set according to actual needs.

[0047] Specifically, the first plastic lens barrel 10 and the second plastic lens barrel 20 are bonded together by an adhesive structure 60. This arrangement makes the connection between the first plastic lens barrel 10 and the second plastic lens barrel 20 more stable and easier to implement, which helps to ensure both connection strength and low cost.

[0048] The camera module of this application will now be described in conjunction with specific embodiments and accompanying drawings.

[0049] Example 1

[0050] like Figures 1 to 4 As shown, the camera module of Embodiment 1 is described.

[0051] In this embodiment, the second plastic lens tube 20 is sleeved on the outside of the first plastic lens tube 10. The first plastic lens tube 10 is composed of a front end 11, a middle part 12 and a tail end 13 in sequence from the first side to the second side along the optical axis 50. The outer wall surfaces of the front end 11, the middle part 12 and the tail end 13 are all covered with the second plastic lens tube 20 in a conformal manner, and the second plastic lens tube 20 is a whole.

[0052] like Figure 1 and Figure 2 As shown, the external module structure 30 includes a first external module structure 31 and a second external module structure 32. The outer wall surface of the second plastic lens barrel 20 corresponding to the front end 11 is connected to the first external module structure 31, and the outer wall surface of the second plastic lens barrel 20 corresponding to the rear end 13 is connected to the second external module structure 32. The first external module structure 31 can be used to match the variable aperture, and the second external module structure 32 is used to match the drive motor.

[0053] Figure 3The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are formed by multi-segment injection molding. Figure 4 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are both integrally formed and are connected by an adhesive structure 60.

[0054] In this embodiment, the axial length b of the second plastic lens barrel 20 is 7.26 mm, and the maximum radial thickness h of the second plastic lens barrel 20 is 0.20 mm or 0.17 mm.

[0055] Example 2

[0056] like Figure 5 and Figure 6 As shown, the camera module of Embodiment 2 is described.

[0057] The difference between this embodiment and Embodiment 1 is that only the outer walls of the front end portion 11 and the rear end portion 13 are covered with a second plastic lens barrel 20. The second plastic lens barrel 20 is divided into a first part 21 and a second part 22. The external module structure 30 includes a first external module structure 31 and a second external module structure 32. The outer wall of the first part 21 is connected to the first external module structure 31, and the outer wall of the second part 22 is connected to the second external module structure 32. In this embodiment, the first part 21 is the part provided on the outer wall of the front end portion 11, and the second part 22 is the part provided on the outer wall of the rear end portion 13.

[0058] Figure 5 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are formed by multi-segment injection molding. Figure 6 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are both integrally formed and are connected by an adhesive structure 60.

[0059] In this embodiment, the axial length b of the second plastic lens barrel 20 is greater than or equal to 2.29 mm and less than or equal to 3.3 mm, and the maximum radial thickness h of the second plastic lens barrel 20 is greater than or equal to 0.20 mm and less than or equal to 0.48 mm.

[0060] Example 3

[0061] like Figure 7 and Figure 8 As shown, the camera module of Embodiment 3 is described.

[0062] The difference between this embodiment and Embodiment 1 is that only the tail end 13 is covered with a second plastic lens tube 20.

[0063] Figure 7The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are formed by multi-segment injection molding. Figure 8 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are both integrally formed and are connected by an adhesive structure 60.

[0064] In this embodiment, the axial length b of the second plastic lens barrel 20 is 3.30 mm, and the maximum radial thickness h of the second plastic lens barrel 20 is 0.20 mm.

[0065] Example 4

[0066] like Figure 9 and Figure 10 As shown, the camera module of Embodiment 4 is described.

[0067] The difference between this embodiment and Embodiment 1 is that only the front end portion 11 is covered with a second plastic lens barrel 20. Furthermore, in this embodiment, the rear end portion 13 of the first plastic lens barrel 10 is also fitted with other external structures.

[0068] Figure 9 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are formed by multi-segment injection molding. Figure 10 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are both integrally formed and are connected by an adhesive structure 60.

[0069] In this embodiment, the axial length b of the second plastic lens barrel 20 is 2.29 mm, and the maximum radial thickness h of the second plastic lens barrel 20 is greater than or equal to 0.28 mm and less than or equal to 0.48 mm.

[0070] Example 5

[0071] like Figure 11 and Figure 12 As shown, the camera module of Embodiment 5 is described.

[0072] The difference between this embodiment and Embodiment 1 is that the first plastic lens barrel 10 is located on the first side of the second plastic lens barrel 20, and the end face of the second side of the first plastic lens barrel 10 is connected to the end face of the first side of the second plastic lens barrel 20. The external module structure 30 is connected to the outer wall surface of the second plastic lens barrel 20 on the side away from the first plastic lens barrel 10.

[0073] Figure 11 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are formed by multi-segment injection molding. Figure 12 The first plastic lens barrel 10 and the second plastic lens barrel 20 shown are both integrally formed and are connected by an adhesive structure 60.

[0074] In this embodiment, the axial length b of the second plastic lens barrel 20 is 4.43 mm, and the maximum radial thickness h of the second plastic lens barrel 20 is 0.51 mm.

[0075] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0076] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0077] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0078] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A camera module, characterized in that, The system includes a first plastic lens barrel (10), a second plastic lens barrel (20), an optical element (40), and an external module structure (30). The first plastic lens barrel (10) and the second plastic lens barrel (20) are coaxially arranged. At least the optical element (40) is housed in the first plastic lens barrel (10). The external module structure (30) is connected to the outer wall surface of the second plastic lens barrel (20). The second plastic lens barrel (20) is fitted onto the outside of the first plastic lens barrel (10). The first plastic lens barrel (10) is composed of a front end portion (11), a middle portion (12), and a rear end portion (13) sequentially from the first side to the second side along the optical axis (50). The second plastic lens barrel (20) is conformally covered on the outer wall surface of at least one of the front end portion (11), the middle portion (12), and the rear end portion (13); or, The first plastic lens barrel (10) is located on the first side of the second plastic lens barrel (20), and the end face of the second side of the first plastic lens barrel (10) is connected to the end face of the first side of the second plastic lens barrel (20).

2. The camera module according to claim 1, characterized in that, The axial length b of the second plastic lens barrel (20) and the maximum radial thickness h of the second plastic lens barrel (20) satisfy the following condition: 4.70≤b / h≤42.

80.

3. The camera module according to claim 2, characterized in that, When the first plastic lens barrel (10) is located on the first side of the second plastic lens barrel (20) and the end face of the second side of the first plastic lens barrel (10) is connected to the end face of the first side of the second plastic lens barrel (20), the axial length b of the second plastic lens barrel (20) and the maximum radial thickness h of the second plastic lens barrel (20) satisfy the following: 4.70≤b / h≤8.

80.

4. The camera module according to claim 1, characterized in that, When the second plastic lens barrel (20) is fitted on the outside of the first plastic lens barrel (10), the maximum radial thickness of the second plastic lens barrel (20) is less than the maximum radial thickness of the first plastic lens barrel (10).

5. The camera module according to claim 1, characterized in that, The axial length b of the second plastic lens barrel (20) is greater than or equal to 2.25 mm and less than or equal to 7.30 mm; The maximum radial thickness h of the second plastic lens barrel (20) is greater than or equal to 0.15 mm and less than or equal to 0.55 mm.

6. The camera module according to claim 1, characterized in that, When the second plastic lens tube (20) is fitted over the outside of the first plastic lens tube (10), The outer walls of the front end (11), the middle part (12), and the rear end (13) are all covered with the second plastic lens tube (20); or, The second plastic lens barrel (20) is shaped and covered only on the front end portion (11); or, the second plastic lens barrel (20) is shaped and covered only on the rear end portion (13); or, The second plastic lens tube (20) is conformally covered on the outer wall surface of only the front end (11) and the tail end (13).

7. The camera module according to claim 1, characterized in that, When the outer wall surfaces of at least two of the front end (11), the middle part (12) and the tail end (13) are covered with the second plastic lens barrel (20), the second plastic lens barrel (20) is divided into a first part (21) and a second part (22). The external module structure (30) includes a first external module structure (31) and a second external module structure (32). The outer wall surface of the first part (21) is connected to the first external module structure (31), and the outer wall surface of the second part (22) is connected to the second external module structure (32).

8. The camera module according to claim 1, characterized in that, The elastic modulus of the second plastic lens barrel (20) is greater than that of the first plastic lens barrel (10). The elastic modulus of the first plastic lens barrel (10) is greater than or equal to 2000 MPa and less than or equal to 3500 MPa; and / or, The elastic modulus of the second plastic lens barrel (20) is greater than or equal to 4000 MPa and less than or equal to 8000 MPa.

9. The camera module according to any one of claims 1 to 8, characterized in that, The optical element (40) includes multiple lenses and at least one support member. When the second plastic lens barrel (20) is sleeved on the outside of the first plastic lens barrel (10), the multiple lenses and the support member are housed in the first plastic lens barrel (10), and at least some of the outer peripheral surfaces of the lenses are in contact with the inner wall surface of the first plastic lens barrel (10). When the first plastic lens barrel (10) is located on the first side of the second plastic lens barrel (20) and the end face of the second side of the first plastic lens barrel (10) is connected to the end face of the first side of the second plastic lens barrel (20), the multiple lenses and the support member are housed in the first plastic lens barrel (10) and the second plastic lens barrel (20).

10. The camera module according to any one of claims 1 to 8, characterized in that, The first plastic lens barrel (10) and the second plastic lens barrel (20) are bonded together by an adhesive structure (60).

Images