Camera module, manufacturing method thereof and vehicle

Abstract

The invention relates to a camera module, a manufacturing method thereof and a vehicle. The camera module comprises a shell part and a camera assembly. A mounting cavity and a positioning hole communicated with the mounting cavity are formed in the shell part; the camera assembly comprises a lens and a circuit board, the lens is welded and fixed to the positioning hole, and the circuit board is arranged in the mounting cavity and welded and fixed to the lens. According to the camera module, the manufacturing method thereof and the vehicle, the technical problem that the assembly error of a trinocular camera in the prior art is large can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of camera devices, in particular to a camera module, a process method thereof and a vehicle. BACKGROUND

[0002] In the related art, a front-view three-camera for a vehicle includes two near-focus camera assemblies and one far-focus camera assembly, and the near-focus camera assemblies and the far-focus camera assembly are arranged side by side on a fixed support. In the actual assembly and production process, the elements of the camera assembly and the camera assembly and the fixed support are mostly fixed by fixed glue, and the assembly error is relatively large, which can easily affect the imaging quality of the three-camera. SUMMARY

[0003] The present application provides a camera module, a process method thereof and a vehicle to solve the technical problem of a large assembly error of a three-camera in the related art.

[0004] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a camera module is disclosed, comprising:

[0005] A housing component, wherein an installation cavity and a positioning hole in communication with the installation cavity are arranged on the housing component;

[0006] A camera assembly, wherein the camera assembly comprises a lens and a circuit board, the lens is fixed to the positioning hole, and the circuit board is arranged in the installation cavity and is welded and fixed with the lens.

[0007] Optionally, a first positioning component is arranged between the lens and the circuit board, and the lens and the circuit board are welded and fixed after being positioned by the first positioning component.

[0008] Optionally, the first positioning component comprises a positioning through hole and a positioning protruding column inserted into the positioning through hole, one of the positioning protruding column and the positioning through hole is arranged on the lens, and the other is arranged on the circuit board.

[0009] Optionally, the lens and the circuit board are welded and fixed at the matching position of the positioning protruding column and the positioning through hole; and / or,

[0010] An image sensor is arranged on the side of the circuit board close to the lens; and / or,

[0011] The positioning protruding column is a conductive column.

[0012] Optionally, the first positioning component comprises a plurality of first positioning components, and the plurality of first positioning components are arranged at intervals along the circumference of the lens.

[0013] Optionally, a second positioning component is arranged between the lens and the housing component, and the lens and the housing component are welded after being positioned by the second positioning component.

[0014] Optionally, the second positioning component comprises:

[0015] a ring-shaped flange arranged on the lens and coaxially arranged with the lens;

[0016] a positioning step surface arranged on the inner wall surface of the positioning hole and matched with the ring-shaped flange.

[0017] Optionally, an anti-rotation limiting component is arranged between the ring-shaped flange and the positioning step surface, and the anti-rotation limiting component is configured to prevent the lens from rotating around its own axis.

[0018] Optionally, the anti-rotation limiting component comprises a groove and a protrusion matched with the groove, one of the groove and the protrusion is arranged on the ring-shaped flange, and the other is arranged on the positioning step surface.

[0019] Optionally, the camera assembly further comprises a sealing element sleeved on the outer periphery of the lens and abutting between the circuit board and the lens.

[0020] Optionally, the lens comprises a main body and a lens seat, and the main body and the lens seat are fixedly connected by at least one of welding, bonding, screwing and one-piece forming.

[0021] Optionally, the positioning hole and the camera assembly are both multiple, and multiple camera assemblies and multiple positioning holes are arranged one-to-one.

[0022] Optionally, the positioning hole and the camera assembly are both three, two of the three camera assemblies are short-focus camera assemblies, and the other is a long-focus camera assembly, and the two short-focus camera assemblies are arranged on opposite sides of the long-focus camera assembly.

[0023] Optionally, the camera assembly further comprises a connector fixed to the housing component and electrically connected with the circuit board.

[0024] Optionally, the connector comprises a floating connector.

[0025] Optionally, the housing component comprises a first shell and a second shell, the first shell is buckled on the second shell and forms the mounting cavity with the second shell, the positioning hole is arranged on the first shell, and the connector is arranged in one-piece with the second shell.

[0026] In a second aspect, the present application also provides a process method of the camera module, which is used to prepare the camera module mentioned above, and the process method comprises:

[0027] fixing the lens in the positioning hole on the first shell;

[0028] precisely positioning the circuit board on the lens and welding the lens and the circuit board;

[0029] fixing the second shell on the first shell and electrically connecting the connector and the circuit board.

[0030] Optionally, the step of precisely positioning the circuit board on the lens and welding the lens and the circuit board comprises:

[0031] positioning the circuit board on the lens through the first positioning component;

[0032] fine-tuning the circuit board by using the precision checking device to make the relative position of the circuit board and the lens optimal;

[0033] welding along the outer periphery of the first positioning component to weld the lens and the circuit board.

[0034] Optionally, during the process of welding along the outer periphery of the first positioning component to weld the lens and the circuit board, the smoke and dust generated during welding are adsorbed.

[0035] In a third aspect, the present application also provides a vehicle, which comprises the camera module mentioned above; or,

[0036] the vehicle comprises the camera module prepared by the process method of the camera module mentioned above.

[0037] In the camera module of the present application, the lens is fixed in the positioning hole, and at the same time, the circuit board and the lens are fixed by welding. Compared with the fixing method by using fixing glue (which needs UV pre-curing and high-temperature curing), the process operation of the welding method between the lens and the circuit board in the present application is simpler. Since there is no glue heat curing process during welding, it is not necessary to consider the assembly error caused by the glue heat curing process, which can effectively improve the assembly precision of the camera module in the present embodiment, and further achieve the purpose of improving the imaging quality of the camera module of the present application.

[0038] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0040] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0041] Figure 1 is an exploded view of the camera module disclosed by the embodiments of the present application;

[0042] Figure 2 is a sectional view of the camera module disclosed by the embodiments of the present application;

[0043] Figure 3 is a bottom view when the lens is mounted on the first housing according to the embodiments of the present application;

[0044] Figure 4 is an enlarged view of the M area in Figure 3 ;

[0045] Figure 5 is a sectional view of Figure 3 ;

[0046] Figure 6 is an enlarged view of the N area in Figure 5 ;

[0047] Figure 7 is a bottom view when the lens and the circuit board are mounted on the first housing according to the embodiments of the present application;

[0048] Figure 8 is an enlarged view of the O area in Figure 7 ;

[0049] Figure 9 is a sectional view of Figure 7 ;

[0050] Figure 10 is an enlarged view of the P area in Figure 9 ;

[0051] Figure 11 is an exploded view of the lens disclosed by the embodiments of the present application;

[0052] Figure 12 is a schematic diagram of the positional relationship between the tool and the lens when welding the circuit board and the lens of the camera module;

[0053] Figure 13 is a relationship diagram of the rotation angle of the image sensor and the external parameter value;

[0054] Figure 14 is a flowchart of a process method of a camera module disclosed in the embodiments of the present application.

[0055] Explanation of reference signs:

[0056] 100, camera module;

[0057] 10, housing component; 11, first housing; 111, positioning hole; 12, second housing; 101, mounting cavity;

[0058] 20, camera assembly; 21, lens; 211, main body; 212, lens seat; 22, circuit board; 221, image sensor; 23, sealing element; 24, connector;

[0059] 30, first positioning component; 31, positioning through hole; 32, positioning protruding column;

[0060] 40, second positioning component; 41, annular flange; 42, positioning step surface;

[0061] 50, anti-rotation limiting component; 51, groove; 52, protrusion;

[0062] 60, diagram card;

[0063] 70, laser soldering module;

[0064] 80, six-axis robot module;

[0065] 90, FFU module. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0067] As described in the background, in the actual assembly and production process of the three-camera camera, the elements of the camera assembly and the camera assembly and the fixing support are mostly fixed by fixed glue, and the assembly error is relatively large, which can easily affect the imaging quality of the three-camera camera. Therefore, the present application provides a camera module, which has high assembly precision and can effectively avoid the technical problem of low imaging quality of the camera module caused by large assembly error. The camera module of the present application will be described in detail below with reference to the drawings.

[0068] Referring to Figure 1 andFigure 2 As shown, according to the embodiments of the present application, a camera module 100 is provided, which comprises a housing component 10 and a camera assembly 20.

[0069] The housing component 10 is provided with a mounting cavity 101 and a positioning hole 111 communicating with the mounting cavity 101. The camera assembly 20 comprises a lens 21 and a circuit board 22. In actual installation, the lens 21 is fixed to the positioning hole 111, and the circuit board 22 is arranged in the mounting cavity 101 and is welded and fixed with the lens 21.

[0070] In the present embodiment, since the circuit board 22 and the lens 21 are fixed by welding, compared with the fixing by adhesive (which needs UV pre-curing and high-temperature curing), the welding fixing between the lens 21 and the circuit board 22 in the present application is simpler in process operation. Since there is no adhesive curing process in the welding process, the assembly error caused by the adhesive curing process does not need to be considered, which can effectively improve the assembly precision of the camera module in the present embodiment, and thus the imaging quality of the camera module of the present application can be improved.

[0071] It can be understood that after the lens 21 is installed in the present embodiment, the front end of the lens 21, i.e. the end close to the object side, can protrude out of the housing component 10 or be located in the positioning hole 111. The present application is not limited thereto. Figure 2 The case where the lens 21 protrudes out of the housing component 10 is shown in the present application.

[0072] In combination with Figures 3 to 10 As shown, in some embodiments, a first positioning component 30 is arranged between the lens 21 and the circuit board 22. In actual installation, the lens 21 and the circuit board 22 are welded or adhesively fixed after being positioned by the first positioning component 30. In the present application, welding is preferably adopted for fixing, which is simple in process and can effectively improve the production efficiency of the camera module 100.

[0073] By arranging the first positioning component 30, the present application can position the relative positions between the lens 21 and the circuit board 22, and thus the welding yield and assembly precision of the camera module 100 in the present embodiment can be improved.

[0074] Exemplarily, in some embodiments, the first positioning component 30 comprises a positioning through hole 31 and a positioning protruding column 32 inserted into the positioning through hole 31. One of the positioning protruding column 32 and the positioning through hole 31 is arranged on the lens 21, and the other is arranged on the circuit board 22. That is to say, when the positioning protruding column 32 is arranged on the lens 21, the positioning through hole 31 is arranged on the circuit board 22; when the positioning protruding column 32 is arranged on the circuit board 22, the positioning through hole 31 is arranged on the lens 21. The present application is not limited thereto. Figures 3 to 8The positioning protrusion 32 is arranged on the lens 21, and the positioning through hole 31 is arranged on the circuit board 22. Through the cooperation of the positioning through hole 31 and the positioning protrusion 32, the circuit board 22 can be prevented from being offset from the lens 21 during welding, thereby affecting the production yield of the camera module 100.

[0075] In the present application, the side of the circuit board 22 close to the lens 21 is provided with an image sensor 221 (as shown in the figure), which is used to collect the image transmitted by the lens 21. In the actual production process of the camera module 100, the side of the circuit board 22 provided with the image sensor 221 is installed on the image side of the lens 21, and the Roll angle (the Roll angle refers to the angle deviation of the rotation of the image sensor around its optical center axis (usually Z axis)) generated during the patching of the image sensor 221 can be corrected by the AA (Active Alignment, active alignment) device. After the image adjustment is completed, the circuit board 22 and the lens 21 are welded and fixed. The AA device in the present application can be used to adjust the attitude and relative position relationship between the lens 21 and the image sensor 221, to ensure the quality and consistency of the picture. Figure 10 In some embodiments, the lens 21 and the circuit board 22 are welded and fixed at the cooperation position of the positioning protrusion 32 and the positioning through hole 31. After welding, there is no gap between the positioning protrusion 32 and the positioning through hole 31. Therefore, only the sealing structure needs to be arranged on the outer periphery of the side of the circuit board 22 close to the lens 21, and the components (such as the image sensor) on the side of the circuit board 22 close to the lens 21 can be protected.

[0076] For example, the positioning protrusion 32 in the present embodiment is a conductive column, which can be a copper column or other metal conductive column. By arranging the positioning protrusion 32 as a conductive column, the lens 21 and the circuit board 22 are conductive after welding, which is more suitable for ESD test (electrostatic discharge immunity test) or EMC test (electromagnetic compatibility test) of the camera module 100.

[0077] Optionally, before welding, the positioning through hole 31 and the positioning protrusion 32 are gap-fitted. In this way, when it is necessary to correct the Roll angle generated during the patching of the image sensor 221, the relative position between the circuit board 22 and the lens 21 can be fine-tuned, and after the Roll angle is corrected, the circuit board 22 and the lens 21 can be sealed and welded at the positioning protrusion 32 and the positioning through hole 31.

[0078]

[0079] ​After welding, the lens 21 and the circuit board 22 of the present application are in a conductive arrangement, when the camera module 100 is subjected to ESD test or EMC test, the lens 21 is grounded to achieve the grounding of the circuit board 22, and the entire camera module 100 has better static resistance effect.

[0080] Further, the first positioning component 30 in the embodiment includes a plurality of first positioning components 30, which are arranged at intervals along the circumference of the lens 21, facilitating effective positioning of the relative position between the circuit board 22 and the lens 21. Optionally, the first positioning component 30 includes two, three, four or more, which is not specifically limited in the present application. The present application Figure 4 、 Figure 7 and Figure 8 show the case when the first positioning component 30 is four.

[0081] In combination with Figures 2 to 6 、 Figure 9 and Figure 10 , the lens 21 and the housing component 10 are provided with a second positioning component 40, and the lens 21 and the housing component 10 are positioned and fixed by welding after being positioned by the second positioning component 40.

[0082] The present application can position the relative position between the lens 21 and the housing component 10 by providing the second positioning component 40, and can improve the welding yield and assembly precision of the camera module 100 in the embodiment.

[0083] Specifically, the second positioning component 40 includes an annular flange 41 and a positioning step surface 42. The annular flange 41 is arranged on the lens 21 and coaxially arranged with the lens 21; the positioning step surface 42 is arranged on the inner wall surface of the positioning hole 111 and matched with the annular flange 41. In actual arrangement, the annular flange 41 is arranged on the end of the lens 21 close to the image side, and the positioning step surface 42 is arranged on the side of the positioning hole 111 close to the mounting cavity 101. When assembling, the lens 21 is mounted in the positioning hole 111 from the side of the mounting cavity 101, and when the annular flange 41 and the positioning step surface 42 are matched, it means that the lens 21 is installed in place, and then the annular flange 41 and the housing component 10 are welded and fixed, which is simple in operation and saves time and labor.

[0084] Further, in order to avoid rotation of the lens 21 in the positioning hole 111, the annular flange 41 and the positioning step surface 42 in the embodiment are further provided with an anti-rotation limiting component 50, which is configured to prevent the lens 21 from rotating around its own axis.

[0085] Optionally, the anti-rotation limiting component 50 includes a groove 51 and a protrusion 52 adapted to the groove 51. One of the protrusion 52 and the groove 51 is disposed on the annular flange 41, and the other is disposed on the positioning step surface 42. That is, when the groove 51 is disposed on the annular flange 41, the protrusion 52 is disposed on the positioning step surface 42; when the groove 51 is disposed on the positioning step surface 42, the protrusion 52 is disposed on the annular flange 41. In this application, the cooperation and limiting of the groove 51 and the protrusion 52 can prevent the lens 21 from rotating around its own axis, thereby improving the installation stability and reliability of the camera module 100 in this embodiment.

[0086] For example, the anti-rotation limiting component 50 in this embodiment can be one, or it can be two, three, or more than three; no specific limitation is made in this application. Figure 3 and Figure 4 The diagram shows the case when there are two anti-rotation limit components 50.

[0087] It is understood that the specific location of the anti-rotation limiting component 50 in this embodiment is not limited to being located between the annular flange 41 and the positioning step surface 42. As long as it is located between the lens 21 and the positioning hole 111 and can play the role of preventing the lens 21 from rotating.

[0088] Furthermore, in some embodiments, the camera assembly 20 further includes a sealing element 23, which is sleeved on the outer periphery of the lens 21 and abuts against the space between the circuit board 22 and the lens 21. Through the function of the sealing element 23, components disposed between the circuit board 22 and the lens 21, such as the image sensor 221, can be protected. Specifically, by sealing the gap between the circuit board 22 and the lens 21 with the sealing element 23, external dust, impurities, water, etc., can be prevented from entering the space between the circuit board 22 and the lens 21 (inside the sealing element 23) and affecting the image sensor 221.

[0089] For example, the sealing element 23 may include an annular sealing gasket or an annular sealing ring, etc., which are not specifically limited in this application.

[0090] See Figure 11 As shown, in some embodiments, the lens 21 includes a main body 211 and a lens mount 212. The main body 211 is fixedly connected by at least one of welding, bonding, screwing, or integral molding, resulting in a simple structure and easy installation. A lens is disposed inside the main body 211, and the lens 21 supports and positions the main body 211. In actual design, the annular flange 41 is disposed on the lens mount 212 for ease of processing and production. During assembly, the lens 21 is assembled first and then installed in the positioning hole 111.

[0091] Further, in some embodiments of the present application, the shell component 10 comprises a first shell 11 and a second shell 12. In actual assembly, the first shell 11 is buckled on the first shell 11 and forms the mounting cavity 101 described above with the first shell 11, and the first shell 11 is provided with the positioning hole 111 described above. Optionally, the first shell 11 and the second shell 12 can be fixed by at least one of the following modes: screws, buckles, bolts, welding, etc. By setting the shell component 10 as two shells, the present application not only facilitates disassembly and assembly, but also can reduce the production cost of the camera module 100 to a certain extent. Of course, in other embodiments of the present application, the shell component 10 can also be assembled by three, four or more shells, as long as other deformation modes under the concept of the present application are within the protection scope of the present application.

[0092] In the present application, the positioning hole 111 is arranged on the first shell 11, which facilitates supporting and welding the lens 21, and the mounting cavity 101 is formed by surrounding the first shell 11 and the second shell 12, which facilitates protecting the circuit board 22 and preventing external dust or other structures from affecting the components on the circuit board 22.

[0093] Optionally, the camera module 100 of the present application further comprises a connector 24 fixed to the shell component 10 and electrically connected with the circuit board 22. Through the action of the connector 24, the electrical connection between the circuit board 22 and external power supply and other structures can be facilitated. Optionally, the connector 24 in the present embodiment is a floating connector. The arrangement of the floating connector can avoid the stress on the connector 24 from being transmitted to the circuit board 22, thereby affecting the imaging quality of the camera module 100. Of course, the scope of protection of the present application does not exclude the connector without floating function.

[0094] It can be understood that the floating of the connector 24 in the present embodiment can be realized by arranging an elastic pad or a spring between the connector and the shell component 10, or the connector 24 can be an electrical connecting device with floating function on the market, as long as other deformation modes under the concept of the present application are within the protection scope of the present application.

[0095] Optionally, in some embodiments, the connector 24 is integrally formed with the second shell 12. By arranging the connector 24 and the second shell 12 as an integral structure, the assembly process of the camera module 100 can be simplified and the installation strength of the connector 24 can be improved in actual assembly of the camera module 100. Of course, in other embodiments of the present application, the connector 24 can also be fixed on the second shell 12 by welding, screwing, clamping, locking, etc., as long as other deformation modes under the concept of the present application are within the protection scope of the present application.

[0096] In combination withFigures 1 to 11 As shown, the positioning holes 111 and the camera assemblies 20 in the present application are both multiple, and the multiple positioning holes 111 and the multiple camera assemblies 20 are arranged in one-to-one correspondence. For example, the positioning holes 111 and the camera assemblies 20 can be two, three or more than three. In some embodiments, the positioning holes 111 and the camera assemblies 20 are both three, and the three camera assemblies 20 and the three positioning holes 111 are arranged in one-to-one correspondence. In actual assembly, the assembly procedures and processes of the three camera assemblies 20 are consistent, which will not be described here.

[0097] In the present embodiment, two of the three camera assemblies 20 are short-focus camera assemblies, and the other one is a long-focus camera assembly, wherein the two short-focus camera assemblies are arranged on the opposite sides of the long-focus camera assembly. The horizontal viewing angle of the two short-focus camera assemblies in the present application is 120°, and the horizontal viewing angle of the long-focus camera assembly is 30°. In actual use, the distance of an object can be calculated by calculating the imaging difference of the object on the two short-focus camera assemblies (L = f * B / d, where f is the effective focal length of the lens, B is the center distance of the two short-focus cameras, and d is the imaging difference), and the internal and external parameter calibration of the two short-focus camera assemblies is particularly important, thus higher requirements are put forward for the precision of structural installation. Figure 13 As shown, every 0.1° rotation of the image sensor will cause an error of 0.2mm in the external parameter value. The arrangement of the camera assemblies 20 on both sides of the present application can calculate the imaging difference of an object on the two camera assemblies 20, thereby calculating the distance of the object, and the improvement of assembly precision is huge for the ranging performance and consistency of the camera module 100.

[0098] In order to compare the error change effect of the camera module 100 of the present application relative to the traditional three-camera camera, the errors of the camera module 100 of the present application and the traditional three-camera camera are compared and analyzed in Table 1, which is a comparison table of Roll angles of the three-camera camera of the traditional split scheme, the three-camera camera of the traditional integrated scheme and the three-camera camera of the present application.

[0099] Table 1:

[0100]

[0101] According to the above comparison and analysis, it can be known that in the present application, the camera module 100 adopts AA equipment and welding process to cooperate with the calibration of the image sensor 221 on the circuit board 22, which can solve the Roll angle caused in the assembly process of the image sensor 221, and the precision is improved by more than 90% compared with the traditional scheme, which can effectively ensure the external parameter consistency of the camera module 100.

[0102] In the second aspect, referring to Figures 1 to 14As shown, the application also provides a process method of the camera module, which is used for preparing the camera module 100 in the above embodiments.

[0103] Specifically, the process method in the application includes the following steps:

[0104] Step S1: Fix the lens 21 in the positioning hole 111 on the first shell 11.

[0105] In this step, first, the first shell 11 is flipped so that the outer surface of the first shell 11 is arranged towards the horizontal plane, and then the lens 21 is installed in the positioning hole 111 from the inner side of the first shell 11. When the lens 21 is limited by the second positioning component 40 and the anti-rotation limiting component 50, the lens 21 can be welded and fixed or bonded and fixed on the first shell 11.

[0106] Optionally, when welding, the laser soldering process is used to weld the lens 21 on the first shell 11. Laser soldering is a high-precision welding technology, which has the characteristics of non-contact, high energy density and strong controllability, and has shown significant advantages in the fields of microelectronic packaging and precision device manufacturing, which can effectively provide the welding quality of the lens 21 and the first shell 11 in this embodiment.

[0107] Step S2: Precisely position the circuit board 22 on the lens 21 and weld and fix the lens 21 and the circuit board 22.

[0108] In this step, first, the circuit board 22 is positioned on the lens 21 through the first positioning component 30, that is, the side of the circuit board 22 provided with the image sensor 221 is arranged close to the image side of the lens 21, and the circuit board 22 and the lens 21 are coarsely positioned through the first positioning component 30.

[0109] Then, the precision checking device is used to fine-tune the circuit board 22 so that the relative position of the circuit board 22 and the lens 21 reaches an optimal state. Alternatively, the precision checking device in the embodiment can be an active alignment device (i.e., an AA device), and it can be understood that the optimal state is the optimal state (i.e., the state of the best image quality) determined by the AA device or the experience of an operator. In this step, when the active alignment device is used, the chart 60 used for calibration is placed on the object side of the lens 21 (i.e., below the lens 21), and the AA device is provided with a six-axis mechanical hand module 80, a laser soldering module 70, and an FFU module 90. The six-axis mechanical hand module 80 is used to hold the circuit board 22 to adjust the image to the best. Thereafter, welding is performed along the outer periphery of the first positioning component 30 to weld and fix the lens 21 and the circuit board 22. During the welding process, the laser soldering module 70 is used to perform laser soldering. Laser soldering is a high-precision welding technology, which has the characteristics of non-contact, high energy density, and strong controllability, and has shown significant advantages in the fields of microelectronic packaging and precision device manufacturing, and can effectively provide the welding quality of the lens 21 and the first housing 11 in the embodiment. It can be understood that, between the circuit board 22 and the lens 21, the sealing element 23 needs to be installed between the lens 21 and the circuit board 22. After welding, the sealing element 23 can protect the image sensor 221 located between the circuit board 22 and the lens 21.

[0110] During the welding process of the lens 21 and the circuit board 22, the FFU module 90 is used to adsorb the smoke and dust generated during welding to prevent pollution of the product and the environment. The FFU module 90 (Fan Filter Unit) is a self-powered modular air purification device. It can absorb external air and filter it, and then send out clean air at a uniform wind speed, so as to maintain the cleanliness of the local or overall environment. It has a simple structure and good smoke and dust adsorption effect.

[0111] Step S3: fixing the second housing 12 to the first housing 11 and electrically connecting the connector 24 to the circuit board 22.

[0112] In the present application, after the image is adjusted, the laser soldering module 70 fills the gap between the positioning protruding column 32 and the positioning through hole 31 by soldering, and the lens 21 and the circuit board 22 are fixed after the soldering is cooled. Compared with the traditional process of first UV pre-curing and then high-temperature curing, the laser soldering process of the present application is simpler to operate. Since there is no glue heat curing link in the production process, it is not necessary to consider the glue shrinkage caused by the glue heat curing process, which can improve the assembly precision of the camera module 100, solve the problem of Roll angle caused by the assembly process of the image sensor 221, and the consistency of the product is better.

[0113] According to a third aspect of the present application, a vehicle is provided, which comprises the camera module 100 described above, and thus, the vehicle comprises all the technical effects of the camera module 100 in the above-described embodiments. Since the technical effects of the camera module 100 have been described in detail above, no further description is provided here.

[0114] Optionally, the vehicle in the present embodiment comprises the camera module 100 prepared by the process method of the camera module in the above-described embodiments, and thus, the vehicle comprises all the technical effects of the camera module 100 prepared by the process method of the camera module in the above-described embodiments. Since the technical effects of the camera module 100 prepared by the process method of the camera module have been described in detail above, no further description is provided here.

[0115] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0116] In the above-described embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0117] The embodiments, implementation manners and related technical features of the present application can be combined, replaced with each other without conflict.

[0118] The above is only the preferred embodiments of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification made according to the technical essence of the present application without departing from the technical solution content of the present application, all still belong to the scope of the technical solution of the present application.

Claims

1. A camera module (100), characterized in that, include: The outer casing component (10) is provided with a mounting cavity (101) and a positioning hole (111) communicating with the mounting cavity (101); A camera assembly (20) includes a lens (21) and a circuit board (22). The lens (21) is fixed in the positioning hole (111), and the circuit board (22) is disposed in the mounting cavity (101) and welded to the lens (21).

2. The camera module (100) according to claim 1, characterized in that, A first positioning component (30) is provided between the lens (21) and the circuit board (22). The lens (21) and the circuit board (22) are positioned by the first positioning component (30) and then welded and fixed.

3. The camera module (100) according to claim 2, characterized in that, The first positioning component (30) includes a positioning through hole (31) and a positioning protrusion (32) inserted into the positioning through hole (31). One of the positioning protrusion (32) and the positioning through hole (31) is disposed on the lens (21), and the other is disposed on the circuit board (22).

4. The camera module (100) according to claim 3, characterized in that, The lens (21) and the circuit board (22) are welded and fixed at the mating point of the positioning protrusion (32) and the positioning through hole (31); and / or, An image sensor (221) is disposed on the side of the circuit board (22) near the lens (21); and / or, The positioning protrusion (32) is a conductive post.

5. The camera module (100) according to claim 2, characterized in that, The first positioning component (30) includes a plurality of components, which are arranged at circumferential intervals along the lens (21).

6. The camera module (100) according to claim 1, characterized in that, A second positioning component (40) is provided between the lens (21) and the housing component (10). The lens (21) and the housing component (10) are positioned by the second positioning component (40) and then welded and fixed.

7. The camera module (100) according to claim 6, characterized in that, The second positioning component (40) includes: An annular flange (41) is disposed on the lens (21) and coaxially disposed with respect to the lens (21); A positioning step surface (42) is provided on the inner wall surface of the positioning hole (111) and is adapted to the annular flange (41).

8. The camera module (100) according to claim 7, characterized in that, An anti-rotation limiting component (50) is provided between the annular flange (41) and the positioning step surface (42), and the anti-rotation limiting component (50) is configured to prevent the lens (21) from rotating around its own axis.

9. The camera module (100) according to claim 8, characterized in that, The anti-rotation limiting component (50) includes a groove (51) and a protrusion (52) adapted to the groove (51). One of the protrusion (52) and the groove (51) is disposed on the annular flange (41), and the other is disposed on the positioning step surface (42).

10. The camera module (100) according to claim 1, characterized in that, The camera assembly (20) also includes a sealing element (23), which is sleeved on the outer periphery of the lens (21) and abuts against the circuit board (22) and the lens (21).

11. The camera module (100) according to claim 1, characterized in that, The lens (21) includes a main body (211) and a lens mount (212), and the main body (211) and the lens mount (212) are fixedly connected by at least one of welding, bonding, screwing, and integral molding.

12. The camera module (100) according to any one of claims 1 to 11, characterized in that, There are multiple positioning holes (111) and multiple camera components (20), and the multiple positioning holes (111) and multiple camera components (20) are provided in a one-to-one correspondence.

13. The camera module (100) according to claim 12, characterized in that, There are three positioning holes (111) and three camera components (20). Two of the three camera components (20) are short-focus camera components and the other is a long-focus camera component. The two short-focus camera components are respectively disposed on opposite sides of the long-focus camera component.

14. The camera module (100) according to any one of claims 1 to 11, characterized in that, The camera assembly (20) also includes a connector (24) which is fixed to the housing component (10) and electrically connected to the circuit board (22).

15. The camera module (100) according to claim 14, characterized in that, The connector (24) includes a floating connector.

16. The camera module (100) according to claim 14, characterized in that, The outer shell component (10) includes a first shell (11) and a second shell (12). The first shell (11) covers the second shell (12) and together with the second shell (12) forms the mounting cavity (101). The first shell (11) is provided with the positioning hole (111). The connector (24) is integrally formed with the second shell (12).

17. A manufacturing process for a camera module, characterized in that, The manufacturing process is used to prepare the camera module (100) according to any one of claims 1 to 16, and the manufacturing process includes: Fix the lens (21) in the positioning hole (111) on the first housing (11); The circuit board (22) is precisely positioned in the lens (21) and the lens (21) is welded and fixed to the circuit board (22); The second housing (12) is fixed to the first housing (11) and the connector (24) is electrically connected to the circuit board (22).

18. The manufacturing process of the camera module according to claim 17, characterized in that, The steps of precisely positioning the circuit board (22) in the lens (21) and welding the lens (21) to the circuit board (22) include: The circuit board (22) is positioned on the lens (21) by the first positioning component (30); The circuit board (22) is finely adjusted using a precision calibration device to achieve the optimal relative position between the circuit board (22) and the lens (21); Welding is performed along the outer periphery of the first positioning component (30) to weld and fix the lens (21) to the circuit board (22).

19. The manufacturing process of the camera module according to claim 18, characterized in that, During the process of welding along the outer periphery of the first positioning component (30) to fix the lens (21) to the circuit board (22), the fumes and dust generated during welding are absorbed.

20. A vehicle, characterized in that, The vehicle includes the camera module (100) according to any one of claims 1 to 16; or, The vehicle includes the camera module (100) manufactured by the process method of any one of claims 17 to 19.

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