Camera module and image acquisition equipment
By setting the extension in the camera module through the light-through hole and extending towards the image sensor, the problem of the rear focal length limiting the bracket height is solved, and a smaller rear focal length and structural strength of the bracket are achieved, which facilitates processing and stability.
Patent Information
- Application Number
- CN202421728210.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the existing camera modules, the height of the bracket limits the rear focal length, making the bracket difficult to form and has a low structural strength, limiting the height of optional electronic components.
By providing an extension on the bracket, the extension is arranged in the light-through hole and extends toward the image sensor, the distance between the camera and the image sensor is reduced, the structural strength of the bracket is ensured, and processing is facilitated.
It achieves a small rear focal length, while ensuring the structural strength of the bracket, facilitating the molding and production of the bracket, improving the high selectivity of electronic components and the stability of the camera module.
Smart Images
Figure CN223246656U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of camera technology, in particular to a camera module and image acquisition equipment. Background Art
[0002] Back focal length is a critical parameter in camera modules, directly impacting image clarity and overall camera performance. Currently, camera modules consist of a circuit board, lens, electronic components, and a bracket. The bracket is affixed to the circuit board, the lens is affixed to the bracket, and the electronic components are located within the bracket and below the lens. The height of the bracket limits the camera's back focal length, which in turn limits the height of the electronic components. For lenses with shorter back focal lengths, the bracket height needs to be lowered, making it difficult to form the bracket and resulting in lower structural strength, which in turn limits the height of the available electronic components. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention proposes a camera module that ensures the back focal length of the camera module and facilitates the processing and manufacturing of the bracket.
[0004] The utility model also provides an image acquisition device having the camera module.
[0005] According to a first aspect of the present utility model, a camera module is provided, comprising a circuit board, a bracket and a first lens structure, wherein the circuit board is provided with an image sensor; the bracket is connected to the circuit board, and the bracket is provided with a light-through hole corresponding to the image sensor; the first lens structure comprises a main body and an extension portion, wherein the main body is connected to the bracket, the extension portion is protruding from one end of the main body facing the circuit board, the extension portion is passed through the light-through hole and extends toward the image sensor, and the extension portion is spaced apart from the image sensor.
[0006] A camera module according to an embodiment of the present invention has at least the following beneficial effects:
[0007] In this embodiment, the main body is connected to the bracket, and the extension portion is inserted through the light hole and extends toward the image sensor, thereby reducing the distance between the camera and the image sensor, thereby reducing the back focus of the camera module. At the same time, the height of the bracket does not need to be reduced, thus ensuring the structural strength of the bracket and facilitating its manufacture.
[0008] According to some embodiments of the present invention, the extension portion is an annular structure, and the outer peripheral wall of the annular structure is spaced apart from the inner wall of the light-through hole.
[0009] According to some embodiments of the present invention, the distance between the outer peripheral wall of the annular structure and the inner wall of the light-through hole is greater than or equal to 0.15 mm and less than or equal to 0.3 mm.
[0010] According to some embodiments of the present invention, the camera module includes an adhesive member, which is arranged along the circumference of the light-through hole, and one end of the adhesive member is connected to the bracket, and the other end is connected to the body.
[0011] According to some embodiments of the present invention, the minimum thickness of the adhesive is greater than or equal to 0.1 mm and less than or equal to 0.14 mm.
[0012] According to some embodiments of the present invention, the bracket includes a platform and a supporting portion, the light through hole is provided on the platform, the platform is connected to the main body, the supporting portion is provided on the edge of the platform and arranged along the circumference of the platform, the supporting portion extends toward the circuit board and is connected to the circuit board so that the platform and the circuit board are spaced apart, and the image sensor is provided between the platform and the circuit board.
[0013] According to some embodiments of the present invention, along the axial direction of the light-through hole, the thickness of the platform is less than or equal to 0.4 mm.
[0014] According to some embodiments of the present invention, a distance between an end surface of the extension portion close to the image sensor and the image sensor is less than or equal to 0.5 mm.
[0015] According to some embodiments of the present invention, the bracket is further provided with a mounting seat for mounting the second lens structure, the mounting seat protrudes along the height direction of the bracket, and the mounting seat is threadedly connected to the second lens structure.
[0016] According to a second aspect of the present invention, an image acquisition device is provided, comprising the camera module disclosed in the first aspect of the present invention.
[0017] An image acquisition device according to an embodiment of the present invention has at least the following beneficial effects:
[0018] The image acquisition device utilizes the camera module of the first embodiment. The camera module is connected to the bracket via a main body, and an extension portion is disposed through the light aperture and extends toward the image sensor. This reduces the distance between the camera and the image sensor, thereby enabling the camera module to have a shorter back focus. Furthermore, the height of the bracket does not need to be reduced, thereby ensuring the bracket's structural strength and facilitating its molding and manufacturing.
[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0021] Figure 1 This is a structural diagram of an embodiment of a camera module of the present invention;
[0022] Figure 2 An exploded view of an embodiment of a camera module of the present invention;
[0023] Figure 3 A cross-sectional view of an embodiment of a camera module of the present invention;
[0024] Figure 4 for Figure 3 A partial enlarged view of part A in the middle;
[0025] Figure 5 This is a structural diagram of an embodiment of the first lens structure of the present invention;
[0026] Figure 6 This is a schematic diagram of the bottom structure of an embodiment of the first lens structure of the present invention.
[0027] Reference numerals:
[0028] Camera module 10;
[0029] Circuit board 100; image sensor 110;
[0030] Bracket 200; platform 210; light hole 211; support portion 220; mounting base 230;
[0031] First lens structure 300; body 310; extension portion 320; annular structure 321;
[0032] Adhesive 400. DETAILED DESCRIPTION
[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.
[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0035] In the description of this utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0037] Back focal length is a critical parameter in camera modules, directly impacting image clarity and overall camera performance. Currently, camera modules consist of a circuit board, lens, electronic components, and a bracket. The bracket is affixed to the circuit board, the lens is affixed to the bracket, and the electronic components are located within the bracket and below the lens. The height of the bracket limits the camera's back focal length, which in turn limits the height of the electronic components. For lenses with shorter back focal lengths, the bracket height needs to be lowered, making it difficult to form the bracket and resulting in lower structural strength, which in turn limits the height of the available electronic components.
[0038] To this end, some embodiments of the present invention provide a camera module 10, specifically referring to Figures 1 to 6 The camera module 10 is illustrated.
[0039] Reference Figure 1 、 Figure 2 and Figure 3In an embodiment of the present utility model, the camera module 10 includes a circuit board 100, a bracket 200 and a first lens structure 300. The circuit board 100 is provided with an image sensor 110. The bracket 200 is connected to the circuit board 100, and the bracket 200 is provided with a light-through hole 211. The bracket 200 covers the circuit board 100, and the image sensor 110 corresponds to the light-through hole 211. The first lens structure 300 includes a main body 310 and an extension 320. The main body 310 is connected to the bracket 200, and the extension 320 is protruding from one end of the main body 310 facing the circuit board 100. The extension 320 is provided through the light-through hole 211 and extends toward the image sensor 110, so that the light reaches the image sensor 110 after being refracted and focused from the first lens structure 300. By extending the extension portion 320 through the light hole 211 and extending toward the image sensor 110, the distance between the first lens structure 300 and the image sensor 110 is reduced compared to a case where the bracket directly abuts the lens, thereby enabling the camera module 10 to have a smaller back focal length, ensuring that the camera module 10 can have a smaller back focal length, while also eliminating the need to reduce the height of the bracket 200. Since there is no need to reduce the height of the bracket 200, the difficulty of molding the bracket 200 can be significantly reduced, ensuring the structural strength of the bracket 200. Furthermore, the bracket 200 can accommodate image sensors 110 of different heights, thereby increasing the range of optional image sensor 110 heights.
[0040] Reference Figure 5 and Figure 6 In an embodiment of the present invention, the extension portion 320 is an annular structure 321. In a horizontal plane, the cross-section of the extension portion 320 is annular. The outer peripheral wall of the annular structure 321 is spaced apart from the inner wall of the light-through hole 211. Since the extension portion 320 is an annular structure 321, the extension portion 320 can be directly inserted into the extension portion 320. The spaced-apart outer peripheral wall of the annular structure 321 and the inner wall of the light-through hole 211 prevents friction between the outer wall of the annular structure 321 and the inner wall of the light-through hole 211, thereby preventing wear on the extension portion 320 and the light-through hole 211 and facilitating heat dissipation from the first lens structure 300. The spaced-apart outer peripheral wall of the annular structure 321 and the inner wall of the light-through hole 211 allows for a certain degree of tolerance in the dimensions of the light-through hole 211 and the annular structure 321 during manufacturing, reducing processing difficulty.
[0041] It is understood that in another embodiment of the present invention, the extension portion 320 is a square structure, and in a horizontal plane, the cross section of the extension portion 320 is a square. The square cross section of the extension portion 320 facilitates positioning of the extension portion 320 during installation, thereby improving the convenience of installation of the extension portion 320.
[0042] Reference Figure 3 and Figure 4In some embodiments of the present invention, the distance between the outer wall of the annular structure 321 and the inner wall of the light through hole 211 is greater than or equal to 0.15 mm and less than or equal to 0.3 mm. If the distance between the outer wall of the annular structure 321 and the light through hole 211 is less than 0.15 mm, the gap between the outer wall of the annular structure 321 and the light through hole 211 is too small, which in turn causes friction between the annular structure 321 and the light through hole 211, accelerating the wear of the first lens structure 300 and the bracket 200, which is not conducive to the service life of the camera module 10. The gap between the outer wall of the annular structure 321 and the light through hole 211 is too small, which affects the heat dissipation of the first lens structure 300, thereby affecting the performance and service life of the first lens structure 300.
[0043] It is understandable that if the distance between the outer wall of the annular structure 321 and the light hole 211 is greater than 0.3 mm, the gap between the outer wall of the annular structure 321 and the light hole 211 is too large, resulting in a loose connection between the first lens structure 300 and the bracket 200, which in turn causes the first lens to become loose or shake easily during use, affecting the stability of shooting and image clarity. At the same time, it is not conducive to reducing space utilization and causing waste of resources. If the distance between the outer wall of the annular structure 321 and the light hole 211 is too large, it may cause the diameter of the annular structure 321 to be too small, which in turn causes the size of the lens to be too small, which is not conducive to imaging of the first lens structure 300. At the same time, since the main body 310 is connected to the bracket 200, the size of the main body 310 is too large, resulting in increased manufacturing costs and being unfavorable for production.
[0044] Reference Figure 4 It can be understood that the distance between the outer wall of the annular structure 321 and the inner wall of the light-through hole 211 is L. In this embodiment, the distance L between the outer wall of the annular structure 321 and the inner wall of the light-through hole 211 satisfies: 0.15mm≤L≤0.3mm, thereby reducing the wear between the annular structure 321 and the light-through hole 211, which is beneficial to the heat dissipation of the first lens structure 300, ensuring the imaging quality of the first lens structure 300, and avoiding the waste of space resources and excessive production costs.
[0045] Reference Figure 2 and Figure 4In some embodiments of the present invention, the camera module 10 includes an adhesive 400, which is arranged along the circumference of the light-through hole 211. One end of the adhesive 400 is connected to the bracket 200, and the other end is connected to the body 310. The two ends of the adhesive 400 are respectively connected to the bracket 200 and the body 310 of the first lens structure 300, so that the first lens structure 300 is fixed to the bracket 200 to prevent the camera module 10 from moving and shaking during use. The two ends of the adhesive 400 are respectively connected to the bracket 200 and the body 310 of the first lens structure 300. The adhesive 400 has a certain anti-vibration buffering performance. When the camera module 10 is impacted, the adhesive 400 can reduce the vibration between the body 310 and the bracket 200, thereby protecting the first lens assembly and the bracket 200. The adhesive member 400 is arranged along the circumference of the light-through hole 211 , thereby preventing impurities such as dust and moisture from entering the interior of the bracket 200 through the light-through hole 211 , thereby protecting components such as the lens and the image sensor 110 .
[0046] Reference Figure 2 and Figure 4 In some embodiments of the present invention, the minimum thickness of the adhesive 400 is greater than or equal to 0.1 mm and less than or equal to 0.14 mm. If the minimum thickness of the adhesive 400 is less than 0.1 mm, the thickness of the adhesive 400 is too small, resulting in insufficient connection strength of the adhesive 400, resulting in insufficient connection strength between the body 310 and the bracket 200, affecting the stability and imaging quality of the first lens structure 300 during use. If the thickness of the adhesive 400 is too small, the vibration damping and buffering capacity of the adhesive 400 is affected, and thus when the camera module 10 is impacted, the first lens structure 300 and the bracket 200 cannot be well protected. At the same time, if the thickness of the adhesive 400 is too small, the coating of the adhesive 400 becomes more difficult, which is not conducive to the production and installation of the adhesive 400.
[0047] It is understood that if the minimum thickness of the adhesive 400 is greater than 0.14 mm, the adhesive 400 is too thick, resulting in an increase in the overall size of the camera module 10, which is not conducive to reducing space utilization. At the same time, it increases the weight of the camera module 10, which is not conducive to the stability and stability of the camera module 10 during use. If the adhesive 400 is too thick, it is not conducive to the heat dissipation of the first lens structure 300 and results in waste of adhesive 400 material, which is not conducive to reducing production costs.
[0048] Therefore, the minimum thickness of the adhesive 400 is greater than or equal to 0.1 mm and less than or equal to 0.14 mm, which ensures the connection strength between the main body 310 and the bracket 200, ensures the stability and imaging quality of the first lens structure 300 during use, avoids waste of resources, and avoids increased production costs.
[0049] It is understood that adhesive member 400 can be a sticker of a certain thickness to facilitate installation. Alternatively, it can be a glue that is applied and then cured to provide good adhesion and stability. The specific material and production process of adhesive member 400 can be selected based on the actual application and are not limited herein.
[0050] Reference Figure 3 In some embodiments of the present invention, the bracket 200 includes a platform 210 and a support portion 220. A light hole 211 is provided on the platform 210, which is connected to the main body. The support portion 220 is provided at the edge of the platform 210 and arranged along the circumference of the platform 210. The support portion 220 extends toward the circuit board 100 and is connected to the circuit board 100, so that the platform 210 is spaced apart from the circuit board 100, and the image sensor 110 is disposed between the platform 210 and the circuit board 100. The support portion 220 separates the platform 210 from the circuit board 100, creating a certain space between the platform 210 and the circuit board 100, which facilitates the accommodation of components such as the image sensor 110 and can also accommodate image sensors 110 of different sizes. The separation between the platform 210 and the circuit board 100, and the placement of the image sensor 110 between the platform 210 and the circuit board 100, facilitates heat dissipation of components such as the image sensor 110 and the first lens structure 300, thereby increasing the service life of the camera module 10.
[0051] It is understandable that in other embodiments of the present invention, an optical element is provided between the image sensor 110 and the first lens structure 300, and the optical element is used to improve the imaging quality of the first lens structure 300. The platform 210 and the circuit board 100 are spaced apart so that there is space between the platform 210 and the circuit board 100 to accommodate the optical element, which facilitates the arrangement of the optical element in the camera module 10. The optical element can be a filter, which can remove unnecessary light bands to improve the clarity and color reproduction of the image. The optical element can also be a microlens, which is used to improve the sensitivity and signal-to-noise ratio of the image sensor 110. The specific structure of the optical element can be selected according to the actual application, and this application is not limited here.
[0052] Reference Figure 3In some embodiments of the present invention, along the axial direction of the light through hole 211, the thickness H of the platform 210 satisfies: H≤0.4mm. If the thickness of the platform 210 along the axial direction of the light through hole 211 is greater than 0.4mm, the thickness of the platform 210 is too large, which in turn increases the volume and weight of the camera module 10, is not conducive to the lightweight setting of the camera module 10, and reduces the space utilization, is not conducive to the heat dissipation of the camera module 10, and at the same time leads to an increase in manufacturing costs. Therefore, along the axial direction of the light through hole 211, the thickness of the platform 210 is less than or equal to 0.4mm. Optimizing space utilization and avoiding excessive manufacturing costs are conducive to the lightweight setting of the camera module 10.
[0053] Reference Figure 4 In some embodiments of the present invention, the distance W between the end surface of the extension portion 320 close to the image sensor 110 and the image sensor 110 satisfies: W≤0.5mm. The distance between the end surface of the extension portion 320 close to the image sensor 110 and the image sensor 110 is directly related to the back focal length of the first lens structure 300. If the distance between the end surface of the extension portion 320 close to the image sensor 110 and the image sensor 110 is greater than 0.5mm, the back focal length of the first lens structure 300 is too large, affecting the clarity and resolution of the image, and causing image distortion. If the back focal length of the first lens structure 300 is too large, the volume and weight of the camera module 10 are too large, which is not conducive to the lightweight setting of the camera module 10 and is not conducive to saving production costs. Therefore, the distance between the end surface of the extension portion 320 close to the image sensor 110 and the image sensor 110 is less than or equal to 0.5 mm, ensuring the back focal length of the first lens structure 300, avoiding the camera module 10 from being too large in size and weight, and avoiding excessive production costs.
[0054] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the bracket 200 further includes a mounting base 230 for mounting a second lens structure. The mounting base 230 protrudes along the height of the bracket 200 and is threadedly connected to the second lens structure. By providing the second lens structure on the bracket 200, the imaging structure of the camera module 10 is increased, thereby enhancing the imaging diversity and flexibility of the camera module 10. This also improves the integration and compactness of the camera module 10.
[0055] An embodiment of the present invention further provides an image acquisition device, comprising the camera module 10 of the above embodiment.
[0056] Since the image acquisition device adopts all the technical solutions of the camera module 10 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.
[0057] The above describes the embodiments of the present invention in detail with reference to the accompanying drawings. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A camera module, characterized in that: include: a circuit board having an image sensor; A bracket connected to the circuit board, wherein the bracket is provided with a light hole corresponding to the image sensor; The first lens structure includes a main body and an extension portion, wherein the main body is connected to the bracket, the extension portion is protruded from one end of the main body facing the circuit board, the extension portion is passed through the light hole and extends toward the image sensor, and the extension portion is spaced apart from the image sensor.
2. The camera module according to claim 1, wherein: The extension portion is an annular structure, and the outer peripheral wall of the annular structure is spaced apart from the inner wall of the light-through hole.
3. The camera module according to claim 2, wherein: The distance between the outer peripheral wall of the annular structure and the inner wall of the light-through hole is greater than or equal to 0.15 mm and less than or equal to 0.3 mm.
4. The camera module according to claim 1, wherein: The camera module includes an adhesive component, which is arranged along the circumference of the light-through hole. One end of the adhesive component is connected to the bracket, and the other end is connected to the body.
5. The camera module according to claim 4, wherein: The minimum thickness of the adhesive is greater than or equal to 0.1 mm and less than or equal to 0.14 mm.
6. The camera module according to claim 1, wherein: The bracket includes a platform and a supporting portion, the light hole is provided on the platform, the platform is connected to the main body, the supporting portion is provided on the edge of the platform and arranged along the circumference of the platform, the supporting portion extends toward the circuit board and is connected to the circuit board so that the platform and the circuit board are spaced apart, and the image sensor is provided between the platform and the circuit board.
7. The camera module according to claim 6, wherein: Along the axial direction of the light-through hole, the thickness of the platform is less than or equal to 0.4 mm.
8. The camera module according to claim 1, wherein: A distance between an end surface of the extension portion close to the image sensor and the image sensor is less than or equal to 0.5 mm.
9. The camera module according to claim 1, wherein: The bracket is further provided with a mounting seat for mounting the second lens structure, the mounting seat protrudes along the height direction of the bracket, and the mounting seat is threadedly connected to the second lens structure.
10. An image acquisition device, characterized in that: Comprising the camera module as described in any one of claims 1 to 9.