Camera lens module and three-dimensional scanning equipment

Abstract

The invention belongs to the technical field of three-dimensional scanners, and discloses a camera lens module and a three-dimensional scanning device.The camera lens module comprises an installation support, an optical lens assembly and a camera PCBA board, the installation support comprises a lens installation part and a camera module installation part, and the lens installation part and the camera module installation part are integrally formed and connected; a plurality of lens mounting positions are arranged in a first mounting cavity of the lens mounting part; the optical lens assembly is arranged in the first mounting cavity, the multiple optical lenses correspond to the multiple lens mounting positions one to one, and the lens mounting positions are used for restraining the optical lenses; the camera PCBA board is detachably connected to the camera module installation part. According to the camera lens module, the stability of internal parameters of the camera lens module can be improved, the imaging virtual focus phenomenon is prevented, and the scanning precision of three-dimensional scanning equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional scanners, and in particular to a camera lens module and a three-dimensional scanning device. Background Art

[0002] A 3D scanner is a device that uses non-contact measurement technology to obtain spatial coordinate information on the surface of an object and create a digital model of the object. It is used in many industries such as reverse engineering, defect detection, and medicine. A 3D scanner uses light to take photos of an object from multiple angles and splice them to form a 3D model. The position accuracy of the lens module used for shooting and the camera sensor used for data acquisition will affect the working accuracy of the 3D scanner. The multiple optical lenses of the lens module of the existing 3D scanner are focused and pre-assembled with a sleeve to form a lens group. The lens group with the sleeve is installed in the lens bracket as a whole. The lens module and the lens bracket are not directly contacted and installed, and the stability is insufficient. After the shrinkage and deformation of the bonding glue, the relative position of the lens module and the lens bracket will change. In addition, the lens bracket and the camera bracket are connected by fasteners such as screws. After high and low temperature changes, vibration shock, and aging during use, the lens bracket and the camera bracket will be deformed, causing the optical axis of the lens module and the working surface of the camera sensor to move and deflect relative to each other, resulting in changes in the internal parameters of the lens module, causing the imaging out-of-focus phenomenon. Summary of the invention

[0003] An object of the present invention is to provide a camera lens module, which can solve the problem of easy relative position change between the existing lens module and the lens bracket, and the relative movement and deflection between the optical axis of the lens module and the working surface of the camera sensor causing imaging out of focus.

[0004] To achieve this object, the present invention adopts the following technical solutions on one hand:

[0005] Provide camera lens modules, including:

[0006] A mounting bracket, the mounting bracket comprising a lens mounting portion and a camera module mounting portion, the lens mounting portion and the camera module mounting portion are integrally formed and connected, and a first mounting cavity of the lens mounting portion has a plurality of lens mounting positions;

[0007] An optical lens assembly, the optical lens assembly is arranged in the first mounting cavity, and comprises a plurality of optical lenses arranged in sequence along the axial direction of the first mounting cavity, the plurality of optical lenses and the plurality of lens mounting positions correspond one to one, and the lens mounting positions are used to constrain the optical lenses;

[0008] A camera PCBA board is detachably connected to the camera module mounting portion.

[0009] In one embodiment, the camera lens module also includes a fastening assembly, which includes a plurality of annular spacers, which are embedded in the first mounting cavity, crimped to one side of the optical lens and coaxially arranged with the optical lens, and 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.

[0010] In one embodiment, the fastening assembly further includes at least one annular pressure ring, the annular pressure ring having an external thread, the first mounting cavity having an internal thread section, the annular pressure ring being threadedly connected to the internal thread section, and the annular pressure ring being crimped onto one side of the optical lens.

[0011] In one of the embodiments, the fastening assembly includes two annular pressure rings, and the two annular pressure rings are respectively crimped on two sides of the optical lens assembly along the axial direction.

[0012] In one of the embodiments, a plurality of through-going glue injection holes are provided on the side wall of the lens mounting portion, and the plurality of glue injection holes correspond one-to-one to the plurality of lens mounting positions, and the glue injection holes are used to inject glue between the optical lens and the inner cavity wall of the first mounting cavity.

[0013] In one of the embodiments, each of the lens mounting positions is correspondingly provided with a plurality of the glue injection holes, and the plurality of the glue injection holes are evenly spaced along the circumference of the first mounting cavity.

[0014] In one embodiment, the camera lens module also includes an adjustment gasket, which is detachably connected to the mounting bracket, and is disposed between the optical lens assembly and the camera PCBA board. The adjustment gasket abuts against at least one of the optical lens assembly and the camera PCBA board, and is used to adjust the distance between the optical lens assembly and the camera PCBA board.

[0015] In one embodiment, a second mounting cavity is opened 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 gasket abuts against the adjustment step, and the other side abuts against the camera PCBA board.

[0016] In one of the embodiments, the camera lens module further includes a mounting flange, and the mounting flange is disposed outside the mounting bracket;

[0017] 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.

[0018] Another object of the present invention is to provide a three-dimensional scanning device, which has a camera lens module that can solve the problem of easy relative position changes between the existing lens module and the lens bracket, and the relative movement and deflection of the lens module optical axis and the camera sensor working surface causing imaging out of focus, thereby improving the scanning accuracy of the three-dimensional scanning device.

[0019] To achieve this object, the present invention adopts the following technical solution on the other hand:

[0020] A three-dimensional scanning device is provided, comprising the camera lens module as described above.

[0021] Beneficial effects of the present invention:

[0022] The camera lens module provided by the present invention comprises a mounting bracket, an optical lens assembly and a camera PCBA board. The mounting bracket comprises a lens mounting portion and a camera module mounting portion, and the lens mounting portion and the camera module mounting portion are integrally formed and connected. A plurality of lens mounting positions are provided in the first mounting cavity of the lens mounting portion. The optical lens assembly is arranged in the first mounting cavity, and the optical lens assembly comprises a plurality of optical lenses arranged in sequence along the axial direction of the first mounting cavity, and the plurality of optical lenses correspond to the plurality of lens mounting positions one by one, and the lens mounting positions are used to constrain the optical lenses, and it is not necessary to pre-assemble the optical lens assembly in advance, thereby improving the position stability between the optical lens assembly and the lens mounting portion during use. The camera PCBA board is detachably connected to the camera module mounting portion. Moreover, compared with the separation structure of the lens bracket and the camera bracket, the lens mounting portion and the camera module mounting portion integrally formed and connected have better structural stability, and the camera lens module is less deformed after vibration impact, high and low temperature cycle test and long-term use, thereby avoiding relative movement and deflection of the optical axis of the optical lens assembly and the camera PCBA board, improving the internal parameter stability of the camera lens module, and preventing the imaging out-of-focus phenomenon.

[0023] The three-dimensional scanning device provided by the present invention includes the above-mentioned camera lens module, which can improve the scanning accuracy of the three-dimensional scanning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a camera lens module provided by an embodiment of the present invention;

[0025] Figure 2 It is a structural cross-sectional view of a camera lens module provided by an embodiment of the present invention.

[0026] In the figure:

[0027] 1. Mounting bracket; 11. Lens mounting part; 111. First mounting cavity; 12. Camera module mounting part; 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. Adjustment gasket; 6. Mounting flange; 7. Fastening screws. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] The lens module of the existing 3D scanner has multiple optical lenses that are focused and pre-assembled with a sleeve to form a lens group. The lens group with the sleeve is installed as a whole in the lens bracket. The lens module and the lens bracket are not installed in direct contact, which is not stable enough. After the adhesive glue shrinks and deforms, the relative position of the lens module and the lens bracket will change. In addition, the lens bracket and the camera bracket are connected by fasteners such as screws. After high and low temperature changes, vibration shock, and aging during use, the lens bracket and the camera bracket will deform, causing the optical axis of the lens module and the working surface of the camera sensor to move and deflect relative to each other, resulting in changes in the internal parameters of the lens module and causing the imaging out-of-focus phenomenon.

[0033] To solve the above problems, Figure 1 and Figure 2 As shown, this embodiment first provides a camera lens module, which includes a mounting bracket 1, an optical lens assembly 2 and a camera PCBA board 3. The mounting bracket 1 includes a lens mounting portion 11 and a camera module mounting portion 12, and the lens mounting portion 11 and the camera module mounting portion 12 are integrally formed and connected. The first mounting cavity 111 of the lens mounting portion 11 has a plurality of lens mounting positions. The optical lens assembly 2 is arranged in the first mounting cavity 111, and the optical lens assembly 2 includes a plurality of optical lenses 21 arranged in sequence along the axial direction of the first mounting cavity 111. The plurality of optical lenses 21 correspond to a plurality of lens mounting positions one by one, and the lens mounting positions are used to constrain the optical lenses 21, and there is no need to pre-assemble the optical lens assembly 2 in advance, thereby improving the position stability between the optical lens assembly 2 and the lens mounting portion 11 during use. The camera PCBA board 3 is detachably connected to the camera module mounting portion 12. Compared with the separate structure of the lens bracket and the camera bracket, the lens mounting part 11 and the camera module mounting part 12 connected by integral molding have better structural stability. After the camera lens module is subjected to vibration and impact, high and low temperature cycle tests and long-term use, the mounting bracket 1 is less deformed, thereby avoiding relative movement and deflection between the optical axis of the optical lens assembly 2 and the camera PCBA board 3, improving the internal parameter stability of the camera lens module and preventing the imaging out-of-focus phenomenon.

[0034] Preferably, the mounting bracket 1 is made of aviation-grade aluminum alloy material AL7075-T6, which has high hardness, high strength, good mechanical properties and processing stability, and is processed by CNC (computer numerical control) one-piece molding. After processing, it can maintain high dimensional accuracy without deformation.

[0035] In order to improve the installation reliability of the optical lens 21 on the lens installation position, the camera lens module is also provided with a fastening assembly 4. The fastening assembly 4 includes a plurality of annular spacers 41, which are embedded in the first installation cavity 111, and the annular spacers 41 are crimped to 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 plurality of optical lenses 21 correspond to the plurality of lens installation positions one by one. At the same time, the adaptability of the annular shape of the annular spacers 41 and the convex conical surface of the optical lens 21 can be used to automatically calibrate the coaxiality, and while axially positioning the optical lens 21, a self-centering effect is achieved, and the axial position accuracy and radial position accuracy of the optical lens 21 are improved.

[0036] The number and setting positions 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 any specific restrictions and is not limited to the drawings of this embodiment.

[0037] The fastening assembly 4 further includes at least one annular pressing ring 42, the annular pressing ring 42 has an external thread, the first installation cavity 111 has an internal thread section, the annular pressing ring 42 is threadedly connected to the internal thread section, and the annular pressing ring 42 is crimped to one side of the optical lens 21. After the annular spacer 41 adjusts the position of the optical lens 21, the locking of the annular pressing ring 42 ensures that each optical lens 21 is constrained in its corresponding lens installation position, thereby ensuring position accuracy and installation reliability.

[0038] In one embodiment, the fastening assembly 4 includes two annular pressure rings 42, which are respectively crimped on 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.

[0039] In order to further reduce the risk of displacement of the optical lens 21, the side wall of the lens mounting portion 11 is provided with a plurality of through-holes 13, and the plurality of holes 13 correspond to the plurality of lens mounting positions one by one, and the holes 13 are used to inject glue between the optical lens 21 and the inner wall of the first mounting cavity 111. After the position of the optical lens assembly 2 in the lens mounting portion 11 is fixed, a low expansion rate epoxy structural glue is injected through the holes 13 by a glue injection device (not shown in the figure), and the epoxy structural glue has good bonding performance after curing. Since the optical lens 21 has a certain thickness, the glue is bonded between the side of the optical lens 21 and the inner wall of the first mounting cavity 111, ensuring that the optical lens 21 will not shift in the lens mounting portion 11.

[0040] Each lens mounting position is correspondingly provided with a plurality of glue injection holes 13, and the plurality of glue injection holes 13 are evenly spaced along the circumference of the first mounting cavity 111. Exemplarily, in one embodiment, each lens mounting position has three glue injection holes 13, and the three glue injection holes 13 are evenly distributed at 120° along the circumference, so that the glue distribution on the entire circumference of the optical lens 21 is relatively uniform, and the axial or radial position displacement of the optical lens 21 is avoided due to the inconsistent shrinkage and deformation of the colloid after curing.

[0041] The camera lens module also includes an adjustment gasket 5, which is detachably connected to the mounting bracket 1, and is disposed between the optical lens assembly 2 and the camera PCBA board 3. The adjustment gasket 5 abuts against at least one of the optical lens assembly 2 and the camera PCBA board 3, and is used to adjust the focal length of the optical lens assembly 2 and the camera PCBA board 3. After the position of the optical lens assembly 2 in the lens mounting portion 11 is fixed, the focal length of the optical lens assembly 2 and the camera PCBA board 3 is adjusted by selecting adjustment gaskets 5 of different thicknesses. Even if the position between the lens mounting portion 11 and the camera module mounting portion 12 is not adjustable due to the use of an integrally formed mounting bracket 1, the effect of clear focus can still be achieved quickly and conveniently by selecting adjustment gaskets 5 of different thicknesses.

[0042] Specifically, a second mounting cavity 121 is provided in the camera module mounting portion 12, and the second mounting cavity 121 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, and one side of the adjustment gasket 5 abuts against the adjustment step 14, and the other side abuts against the camera PCBA board 3. The adjustment process can be borrowed from a special tool, and adjustment gaskets 5 of different thicknesses can be selected and installed according to the feedback of the focus clarity result. After the focus is clear and meets the use requirements, four fastening screws 7 are finally used to lock the camera PCBA board 3 on the adjustment step 14, and the adjustment gasket 5 is clamped between the camera PCBA board 3 and the adjustment step 14. The focusing process is relatively simple, and there is no need to change the position of the optical lens assembly 2, and the operation is convenient.

[0043] The specific structure and use method of the special tooling can be set with reference to the prior art, and will not be described in detail in this embodiment.

[0044] The camera lens module also includes a mounting flange 6, which is arranged 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 in conjunction with other structural parts. For example, the camera lens module is installed on the crossbeam of the three-dimensional scanning device through the mounting flange 6 to improve the convenience of using the camera lens module. During use, the camera lens module will change its posture relative to the crossbeam. Since the center of gravity of the mounting flange 6 as a support and the camera lens module itself are located in the same plane, the gravity distribution of the camera lens module on both sides of the mounting flange 6 is relatively uniform, reducing the bending moment applied to the camera lens module by the crossbeam, thereby reducing the deformation of the camera lens module.

[0045] The mounting flange 6 and the mounting bracket 1 are integrally formed and connected, for example, by CNC (computer numerical control) integral forming processing, or by injection molding, to improve the connection reliability of the mounting flange 6 and the mounting bracket 1 and avoid relative movement between the mounting flange 6 and the mounting bracket 1.

[0046] The embodiment of the present invention secondly 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 connected, and a plurality of optical lenses 21 can be constrained in corresponding lens mounting positions one by one, thereby improving the position stability between the optical lens assembly 2 and the lens mounting portion 11 during use; moreover, the lens mounting portion 11 and the camera module mounting portion 12 integrally connected have better structural stability, and the mounting bracket 1 of the camera lens module is less deformed after vibration shock, high and low temperature cycle testing, and long-term use, thereby avoiding relative movement and deflection between the optical axis of the optical lens assembly 2 and the camera PCBA board 3, thereby improving the internal parameter stability of the camera lens module, preventing the imaging out-of-focus phenomenon, and improving the scanning accuracy of the three-dimensional scanning device.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A camera lens module, characterized in that: include: A mounting bracket (1), the mounting bracket (1) comprising a lens mounting portion (11) and a camera module mounting portion (12), the lens mounting portion (11) and the camera module mounting portion (12) being integrally formed and connected, and a first mounting cavity (111) of the lens mounting portion (11) having a plurality of lens mounting positions; An optical lens assembly (2), the optical lens assembly (2) being arranged in the first mounting cavity (111), comprising a plurality of optical lenses (21) arranged in sequence along the axial direction of the first mounting cavity (111), the plurality of optical lenses (21) corresponding to the plurality of lens mounting positions one by one, and the lens mounting positions being used to constrain the optical lenses (21); A camera PCBA board (3), wherein the camera PCBA board (3) is detachably connected to the camera module mounting portion (12).

2. The camera lens module according to claim 1, characterized in that: The camera lens module also includes a fastening component (4), the fastening component (4) includes a plurality of annular spacers (41), the annular spacers (41) are embedded in the first mounting cavity (111), the annular spacers (41) are crimped to one side of the optical lens (21) and are coaxially arranged with the optical lens (21), and the annular spacers (41) are used to adjust the axial position of the optical lens (21) so that the plurality of optical lenses (21) and the plurality of lens mounting positions correspond one to one.

3. The camera lens module according to claim 2, characterized in that: The fastening assembly (4) further comprises at least one annular pressing ring (42), wherein the annular pressing ring (42) has an external thread, and the first mounting cavity (111) has an internal thread section, wherein the annular pressing ring (42) is threadedly connected to the internal thread section, and the annular pressing ring (42) is crimped onto one side of the optical lens (21).

4. The camera lens module according to claim 3, characterized in that: The fastening assembly (4) comprises two annular pressing rings (42), and the two annular pressing rings (42) are respectively crimped on two 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 portion (11) is provided with a plurality of through-going glue injection holes (13), the plurality of glue injection holes (13) corresponding one to one with the plurality of lens mounting positions, and the glue injection holes (13) are used to inject glue between the optical lens (21) and the inner cavity wall of the first mounting cavity (111).

6. The camera lens module according to claim 5, characterized in that: Each lens mounting position is correspondingly provided with a plurality of the glue injection holes (13), and the plurality of the glue injection holes (13) are evenly spaced along the circumference of the first mounting cavity (111).

7. The camera lens module according to claim 1, characterized in that: The camera lens module further comprises an adjusting gasket (5), wherein the adjusting gasket (5) is detachably connected to the mounting bracket (1), and the adjusting gasket (5) is arranged between the optical lens assembly (2) and the camera PCBA board (3), and the adjusting gasket (5) abuts against at least one of the optical lens assembly (2) and the camera PCBA board (3), and the adjusting gasket (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: A second mounting cavity (121) is provided in the camera module mounting portion (12); the second mounting cavity (121) is connected to the first mounting cavity (111); the second mounting cavity (121) and the first mounting cavity (111) are coaxially arranged; an adjustment step (14) is provided between the first mounting cavity (111) and the second mounting cavity (121); one side of the adjustment gasket (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 further comprises a mounting flange (6), wherein the mounting flange (6) is arranged 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: Comprising a camera lens module as described in any one of claims 1-9.

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