Camera lens module and three-dimensional scanning equipment
By using a one-piece molded mounting bracket and optical lens assembly, combined with an annular spacer and glue injection hole, the problem of image defocusing caused by changes in the position of the lens module is solved, thus improving the scanning accuracy of the 3D scanning equipment.
Patent Information
- Application Number
- CN202520501744.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-20
AI Technical Summary
The relative position of the lens module and lens holder in existing 3D scanners is prone to change, which can lead to out-of-focus imaging and affect scanning accuracy.
The mounting bracket and optical lens assembly are connected by an integral molding, combined with an annular spacer, an annular pressure ring and glue injection hole to ensure the stability and coaxiality of the optical lens, and the focal length is adjusted by adjusting the shims to avoid the optical axis deflection of the lens assembly.
It improves the stability of the internal parameters of the lens module, prevents image defocusing, and enhances the scanning accuracy of 3D scanning equipment.
Smart Images
Figure CN223826987U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of 3D scanner technology, and in particular to camera lens modules and 3D scanning equipment. Background Technology
[0002] A 3D scanner is a device that uses non-contact measurement technology to acquire spatial coordinate information of an object's surface and create a digital model of the object. It has applications in various industries such as reverse engineering, defect detection, and medicine. A 3D scanner uses light to capture images of an object from multiple angles and stitches them together to form a 3D model. The positional accuracy of the lens module used for capturing images and the camera sensor used for data acquisition affects the working accuracy of the 3D scanner. Currently, the lens module of a 3D scanner uses multiple optical lenses that are focused and pre-assembled into a lens group using a sleeve. The lens group with the sleeve is then installed as a whole within a lens holder. The lens module and lens holder are not in direct contact, resulting in insufficient stability. Shrinkage and deformation of the adhesive can cause changes in the relative position of the lens module and lens holder. Furthermore, the lens holder and camera holder are connected by screws and other fasteners. After exposure to high and low temperature changes, vibration, impact, and aging during use, the lens holder and camera holder can deform, causing relative movement and deflection between the optical axis of the lens module and the working surface of the camera sensor. This leads to changes in the internal parameters of the lens module and causes image defocusing. Utility Model Content
[0003] One objective of this invention is to provide a camera lens module that can solve the problems of easy relative positional changes between existing lens modules and lens supports, as well as the problems of image defocus caused by relative movement and deflection between the optical axis of the lens module and the working surface of the camera sensor.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] Provides camera lens modules, including:
[0006] The mounting bracket includes a lens mounting part and a camera module mounting part, which are integrally formed and connected. The first mounting cavity of the lens mounting part has multiple lens mounting positions.
[0007] An optical lens assembly is disposed within the first mounting cavity and includes a plurality of optical lenses arranged sequentially along the axial direction of the first mounting cavity. The plurality of optical lenses and a plurality of lens mounting positions correspond one-to-one, and the lens mounting positions are used to constrain the optical lenses.
[0008] In one embodiment, the camera lens module further includes a fastening assembly comprising a plurality of annular spacers embedded in the first mounting cavity. The annular spacers are pressed against one side of the optical lens and coaxially arranged with the optical lens. The annular spacers are used to adjust the axial position of the optical lens so that the plurality of optical lenses and the plurality of lens mounting positions correspond one-to-one.
[0009] In one embodiment, the fastening assembly further includes at least one annular retaining ring having an external thread, the first mounting cavity having an internal thread segment, the annular retaining ring being threadedly connected to the internal thread segment, and the annular retaining ring being pressed against one side of the optical lens.
[0010] In one embodiment, the fastening assembly includes two annular pressure rings, which are respectively pressed against both sides of the optical lens assembly along the axial direction.
[0011] In one embodiment, the sidewall of the lens mounting portion is provided with a plurality of through-holes for injecting adhesive, and the plurality of holes for injecting adhesive corresponds one-to-one with the plurality of lens mounting positions. The holes for injecting adhesive between the optical lens and the inner wall of the first mounting cavity.
[0012] In one embodiment, each of the lens mounting positions is provided with a plurality of glue injection holes, and the plurality of glue injection holes are evenly spaced along the circumferential distance of the first mounting cavity.
[0013] In one embodiment, the camera lens module further includes a camera PCBA board and an adjustment shim. The camera PCBA board is detachably connected to the camera module mounting portion, and the adjustment shim is detachably connected to the mounting bracket. The adjustment shim is disposed between the optical lens assembly and the camera PCBA board, and the adjustment shim abuts against at least one of the optical lens assembly and the camera PCBA board. The adjustment shim is used to adjust the distance between the optical lens assembly and the camera PCBA board.
[0014] In one embodiment, a second mounting cavity is provided in the camera module mounting part, the second mounting cavity is connected to the first mounting cavity, the second mounting cavity and the first mounting cavity are coaxially arranged, an adjustment step is provided between the first mounting cavity and the second mounting cavity, one side of the adjustment shim abuts against the adjustment step, and the other side abuts against the camera PCBA board.
[0015] In one embodiment, the camera lens module further includes a mounting flange disposed outside the mounting bracket;
[0016] Wherein, the mounting flange is perpendicular to the axial direction of the mounting bracket, and the center of gravity of the mounting flange and the camera lens module are located in the same plane, and / or, the mounting flange and the mounting bracket are integrally formed and connected.
[0017] Another objective of this invention is to provide a 3D scanning device with a camera lens module that can solve the problems of easy relative positional changes between existing lens modules and lens supports, as well as the problems of image defocus caused by relative movement and deflection between the optical axis of the lens module and the working surface of the camera sensor, thereby improving the scanning accuracy of the 3D scanning device.
[0018] To achieve this objective, the present invention employs the following technical solution in another aspect:
[0019] Provide 3D scanning equipment, including camera lens modules as described above.
[0020] The beneficial effects of this utility model are:
[0021] The camera lens module provided by this utility model includes a mounting bracket and an optical lens assembly. The mounting bracket includes a lens mounting part and a camera module mounting part, which are integrally formed and connected. The first mounting cavity of the lens mounting part has multiple lens mounting positions. The optical lens assembly is disposed in the first mounting cavity and includes multiple optical lenses arranged sequentially along the axial direction of the first mounting cavity. The multiple optical lenses and multiple lens mounting positions correspond one-to-one. The lens mounting positions are used to constrain the optical lenses, eliminating the need for pre-assembly of the optical lens assembly and improving the positional stability between the optical lens assembly and the lens mounting part during use. Moreover, compared to the separate structure of the lens bracket and the camera bracket, the integrally formed lens mounting part and camera module mounting part have better structural stability. After vibration and impact, high and low temperature cycle testing, and long-term use, the mounting bracket deforms less, preventing the optical axis of the optical lens assembly from shifting and deflecting, improving the internal parameter stability of the camera lens module, and preventing image defocusing.
[0022] The 3D scanning device provided by this utility model includes the aforementioned camera lens module, which can improve the scanning accuracy of the 3D scanning device. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the camera lens module provided in this embodiment of the utility model;
[0024] Figure 2 This is a structural cross-sectional view of the camera lens module provided in this embodiment of the utility model.
[0025] In the picture:
[0026] 1. Mounting bracket; 11. Lens mounting section; 111. First mounting cavity; 12. Camera module mounting section; 121. Second mounting cavity; 13. Glue injection hole; 14. Adjustment step; 2. Optical lens assembly; 21. Optical lens; 3. Camera PCBA board; 4. Fastening assembly; 41. Annular spacer; 42. Annular pressure ring; 5. Adjusting shim; 6. Mounting flange; 7. Fastening screw. Detailed Implementation
[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0031] In existing 3D scanners, multiple optical lenses in the lens module are pre-assembled into a lens assembly using a sleeve. This lens assembly, with its sleeve, is then mounted entirely within a lens holder. The lens module and lens holder are not in direct contact, resulting in insufficient stability. Shrinkage and deformation of the adhesive can alter the relative positions of the lens module and lens holder. Furthermore, the lens holder and camera mount are connected by screws and other fasteners. After exposure to high and low temperatures, vibration, and aging during use, both the lens holder and camera mount can deform. This causes relative movement and deflection between the optical axis of the lens module and the working surface of the camera sensor, altering the internal parameters of the lens module and leading to image defocusing.
[0032] To solve the above problems, such as Figure 1 and Figure 2 As shown, this embodiment first provides a camera lens module, which includes a mounting bracket and an optical lens assembly 2. The mounting bracket 1 includes a lens mounting part 11 and a camera module mounting part 12, which are integrally formed and connected. The first mounting cavity 111 of the lens mounting part 11 has multiple lens mounting positions. The optical lens assembly 2 is disposed in the first mounting cavity 111, and the optical lens assembly 2 includes multiple optical lenses 21 arranged sequentially along the axial direction of the first mounting cavity 111. The multiple optical lenses 21 correspond one-to-one with the multiple lens mounting positions. The lens mounting positions are used to constrain the optical lenses 21, eliminating the need for pre-assembly of the optical lens assembly 2 and improving the positional stability between the optical lens assembly 2 and the lens mounting part 11 during use. Compared to the separate structure of the lens bracket and the camera bracket, the integrated lens mounting part 11 and the camera module mounting part 12 have better structural stability. After vibration and impact, high and low temperature cycle testing and long-term use, the mounting bracket 1 has less deformation, which avoids the optical axis of the optical lens assembly 2 from moving and deflecting, improves the internal parameter stability of the camera lens module, and prevents the image from being out of focus.
[0033] Preferably, the mounting bracket 1 is made of aerospace-grade aluminum alloy AL7075-T6, which has high hardness, high strength, good mechanical properties and processing stability. It is integrally formed by CNC (computer numerical control) and can maintain high dimensional accuracy without deformation after processing.
[0034] To improve the installation reliability of the optical lens 21 at the lens mounting position, the camera lens module is also provided with a fastening assembly 4. The fastening assembly 4 includes multiple annular spacers 41, which are embedded in the first mounting cavity 111. The annular spacers 41 are pressed against one side of the optical lens 21 and are coaxially arranged with the optical lens 21. The annular spacers 41 are used to adjust the axial position of the optical lens 21 so that the multiple optical lenses 21 correspond one-to-one with the multiple lens mounting positions. At the same time, the annular shape of the spacers 41 can automatically calibrate the coaxiality by utilizing the adaptability of the annular shape of the spacers 41 to the convex conical surface of the optical lens 21. While axially positioning the optical lens 21, a self-centering effect is achieved, thereby improving the axial and radial positional accuracy of the optical lens 21.
[0035] The number and position of the annular spacers 41 can be selected according to the number and parameters of the optical lenses 21 in the optical lens assembly 2. This embodiment does not impose specific limitations and is not limited to the accompanying drawings of this embodiment.
[0036] The fastening assembly 4 also includes at least one annular retaining ring 42. The annular retaining ring 42 has an external thread, and the first mounting cavity 111 has an internal thread section. The annular retaining ring 42 is threaded to the internal thread section and is pressed against one side of the optical lens 21. After the position of the optical lens 21 is adjusted by the annular spacer 41, the locking of the annular retaining ring 42 ensures that each optical lens 21 is constrained in its corresponding lens mounting position, ensuring positional accuracy and installation reliability.
[0037] In one embodiment, the fastening assembly 4 includes two annular pressure rings 42, which are respectively pressed onto both sides of the optical lens assembly 2 along the axial direction. The axial position of the optical lens assembly 2 is fixed by the annular pressure rings 42, thereby improving the convenience of installing the optical lens assembly 2 in the lens mounting part 11.
[0038] To further reduce the risk of displacement of the optical lens 21, multiple through-holes 13 are provided on the side wall of the lens mounting part 11. Each through-hole 13 corresponds to a lens mounting position, and the through-holes 13 are used to inject adhesive between the optical lens 21 and the inner wall of the first mounting cavity 111. After the optical lens assembly 2 is fixed in position within the lens mounting part 11, low-expansion epoxy structural adhesive is injected through the through-holes 13 using an adhesive injection device (not shown in the figure). The epoxy structural adhesive has good bonding performance after curing. Because the optical lens 21 has a certain thickness, the adhesive adheres between the side of the optical lens 21 and the inner wall of the first mounting cavity 111, ensuring that the optical lens 21 does not shift within the lens mounting part 11.
[0039] Each lens mounting position is provided with a plurality of glue injection holes 13, which are evenly spaced along the circumference of the first mounting cavity 111. For example, in one embodiment, each lens mounting position has three glue injection holes 13, which are evenly distributed at 120° along the circumference, so that the glue is evenly distributed throughout the circumference of the optical lens 21, avoiding uneven shrinkage and deformation of the cured glue that could cause axial or radial displacement of the optical lens 21.
[0040] The camera lens module also includes a camera PCBA board 3 and an adjustment shim 5. The camera PCBA board 3 is detachably connected to the camera module mounting part 12, and the adjustment shim 5 is detachably connected to the mounting bracket 1. The adjustment shim 5 is disposed between the optical lens assembly 2 and the camera PCBA board 3, and the adjustment shim 5 abuts against at least one of the optical lens assembly 2 and the camera PCBA board 3. The adjustment shim 5 is used to adjust the focal length of the optical lens assembly 2 and the camera PCBA board 3. After the optical lens assembly 2 is fixed in position within the lens mounting part 11, the focal length of the optical lens assembly 2 and the camera PCBA board 3 can be adjusted by selecting adjustment shims 5 of different thicknesses. Even if the position between the lens mounting part 11 and the camera module mounting part 12 is not adjustable due to the one-piece molded mounting bracket 1, a clear focusing effect can still be achieved quickly and conveniently by selecting adjustment shims 5 of different thicknesses.
[0041] Specifically, a second mounting cavity 121 is provided within the camera module mounting section 12, which is connected to the first mounting cavity 111. The second mounting cavity 121 and the first mounting cavity 111 are coaxially arranged to ensure the coaxiality of the camera PCBA board 3 and the optical lens assembly 2. An adjustment step 14 is provided between the first mounting cavity 111 and the second mounting cavity 121. One side of the adjustment shim 5 abuts against the adjustment step 14, and the other side abuts against the camera PCBA board 3. The adjustment process can be carried out using a special tooling, and adjustment shims 5 of different thicknesses can be selected and installed according to the feedback of focus clarity. After the focus is clear and meets the usage requirements, the camera PCBA board 3 is finally locked onto the adjustment step 14 using four fastening screws 7, with the adjustment shim 5 sandwiched between the camera PCBA board 3 and the adjustment step 14. The focusing process is relatively simple, does not require changing the position of the optical lens assembly 2, and is easy to operate.
[0042] The specific structure and usage of the special tooling can be set with reference to existing technologies, and will not be elaborated here in this embodiment.
[0043] The camera lens module also includes a mounting flange 6, which is located outside the mounting bracket 1. The mounting flange 6 is perpendicular to the axial direction of the mounting bracket 1, and the center of gravity of the mounting flange 6 and the camera lens module are located in the same plane. The mounting flange 6 is used for installation with other structural components; for example, the camera lens module can be mounted on the crossbeam of a 3D scanning device via the mounting flange 6 to improve the ease of use of the camera lens module. During use, the camera lens module will undergo posture changes relative to the crossbeam. Because the center of gravity of the supporting mounting flange 6 and the camera lens module itself are located in the same plane, the weight distribution of the camera lens module on both sides of the mounting flange 6 is relatively uniform, reducing the bending moment exerted on the camera lens module by the crossbeam, thereby reducing the deformation of the camera lens module.
[0044] The mounting flange 6 and the mounting bracket 1 are integrally molded, for example, by CNC (computer numerical control) molding or by injection molding, which improves the connection reliability of the mounting flange 6 and the mounting bracket 1 and avoids relative movement between the mounting flange 6 and the mounting bracket 1.
[0045] The present invention further provides a three-dimensional scanning device, which includes a camera lens module as described in any of the above embodiments. The lens mounting portion 11 and the camera module mounting portion 12 of the camera lens module are integrally formed and connected, and multiple optical lenses 21 can be constrained one-to-one to their corresponding lens mounting positions, improving the positional stability between the optical lens assembly 2 and the lens mounting portion 11 during use. Furthermore, the integrally formed lens mounting portion 11 and camera module mounting portion 12 have better structural stability. After vibration and impact, high and low temperature cycling tests, and long-term use, the mounting bracket 1 exhibits less deformation, preventing the optical axis of the optical lens assembly 2 from shifting or deflecting, improving the internal parameter stability of the camera lens module, preventing image defocusing, and improving the scanning accuracy of the three-dimensional scanning device.
[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A camera lens module, characterized in that, include: Mounting bracket (1), the mounting bracket (1) includes a lens mounting part (11) and a camera module mounting part (12), the lens mounting part (11) and the camera module mounting part (12) are integrally formed and connected, and the first mounting cavity (111) of the lens mounting part (11) has multiple lens mounting positions; An optical lens assembly (2) is disposed in the first mounting cavity (111) and includes a plurality of optical lenses (21) arranged sequentially along the axial direction of the first mounting cavity (111). The plurality of optical lenses (21) and the plurality of lens mounting positions correspond one-to-one, and the lens mounting positions are used to constrain the optical lenses (21).
2. The camera lens module according to claim 1, characterized in that, The camera lens module also includes a fastening assembly (4), which includes multiple annular spacers (41). The annular spacers (41) are embedded in the first mounting cavity (111). The annular spacers (41) are pressed against one side of the optical lens (21) and are coaxially arranged with the optical lens (21). The annular spacers (41) are used to adjust the axial position of the optical lens (21) so that the multiple optical lenses (21) and the multiple lens mounting positions correspond one-to-one.
3. The camera lens module according to claim 2, characterized in that, The fastening assembly (4) further includes at least one annular pressure ring (42) having an external thread, the first mounting cavity (111) having an internal thread section, the annular pressure ring (42) being threaded to the internal thread section, and the annular pressure ring (42) being pressed against one side of the optical lens (21).
4. The camera lens module according to claim 3, characterized in that, The fastening assembly (4) includes two annular pressure rings (42), which are respectively pressed onto both sides of the optical lens assembly (2) along the axial direction.
5. The camera lens module according to claim 1, characterized in that, The side wall of the lens mounting part (11) is provided with a plurality of through injection holes (13), and the plurality of injection holes (13) correspond one-to-one with the plurality of lens mounting positions. The injection holes (13) are used to inject glue between the optical lens (21) and the inner wall of the first mounting cavity (111).
6. The camera lens module according to claim 5, characterized in that, Each of the lens mounting positions is provided with a plurality of glue injection holes (13), and the plurality of glue injection holes (13) are evenly spaced along the circumferential direction of the first mounting cavity (111).
7. The camera lens module according to claim 1, characterized in that, The camera lens module also includes a camera PCBA board (3) and an adjustment shim (5). The camera PCBA board (3) is detachably connected to the camera module mounting part (12). The adjustment shim (5) is detachably connected to the mounting bracket (1). The adjustment shim (5) is disposed between the optical lens assembly (2) and the camera PCBA board (3). The adjustment shim (5) abuts against at least one of the optical lens assembly (2) and the camera PCBA board (3). The adjustment shim (5) is used to adjust the distance between the optical lens assembly (2) and the camera PCBA board (3).
8. The camera lens module according to claim 7, characterized in that, The camera module mounting part (12) has a second mounting cavity (121) inside, which is connected to the first mounting cavity (111). The second mounting cavity (121) and the first mounting cavity (111) are coaxially arranged. There is an adjustment step (14) between the first mounting cavity (111) and the second mounting cavity (121). One side of the adjustment shim (5) abuts against the adjustment step (14), and the other side abuts against the camera PCBA board (3).
9. The camera lens module according to claim 1, characterized in that, The camera lens module also includes a mounting flange (6), which is disposed outside the mounting bracket (1); The mounting flange (6) is perpendicular to the axial direction of the mounting bracket (1), and the center of gravity of the mounting flange (6) and the camera lens module are located in the same plane, and / or the mounting flange (6) and the mounting bracket (1) are integrally formed and connected.
10. A three-dimensional scanning device, characterized in that, Includes the camera lens module as described in any one of claims 1-9.