Vehicle-mounted camera and packaging method thereof

Abstract

The embodiment of the present application relates to a kind of vehicle camera and its packaging method, the vehicle camera includes: the rear shell with containing cavity in the inside and being opened with the mouth at one end;And, corresponding to cover the mouth of rear shell and with the fixed interface of rear shell, front shell;Wherein, rear shell forms annular step at the circumference of mouth, annular step includes high step part, low step part located in high step part inner side and the connecting ring surface corresponding to the link of high step part and low step part, the circumference of front shell forms annular welding ring, front shell is placed on the low step part of annular step with welding ring, the gap between the outer ring surface of welding ring and connecting ring surface is formed, by laser welding process makes welding ring and high step part are partially fused and are sealed connection integrally, rear shell and front shell have the light shielding portion of preventing external stray light and laser shooting into containing cavity inside.The vehicle camera provided by the embodiment of the present application does not need to set another light transmission site, is advantageous to simplify welding process, is suitable for automated mass production.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted camera technology, specifically to a vehicle-mounted camera and its packaging method. Background Technology

[0002] With the rapid popularization of intelligent driving and ADAS systems, vehicle cameras have gradually become standard components in automobiles. Vehicle cameras operate in harsh environments such as alternating high and low temperatures, high pressure spraying, salt spray, and continuous vibration, which places stringent requirements on the sealing performance, structural strength, optical cleanliness, and dimensional accuracy of their housings.

[0003] The lens of the vehicle-mounted camera is assembled onto a housing, which is mainly composed of a front and rear plastic shell combined using appropriate packaging processes. Currently, the mainstream packaging methods include adhesive bonding, ultrasonic welding, hot plate welding, and laser welding.

[0004] Among them, the adhesive bonding method has problems such as poor weather resistance, glue overflow contamination of optical components, and long curing cycle; the ultrasonic welding method is prone to vibration and impact and dust debris, which can damage the internal photosensitive chip and lens assembly, affecting the image quality; the hot plate welding method has a large heat-affected area, which can easily cause deformation of thin-walled shells and dimensional deviations, all of which cannot meet the requirements of high-end automotive cameras.

[0005] Laser-guided welding, with its advantages of being vibration-free, dust-free, having a small heat-affected zone, and excellent sealing performance, has gradually become the mainstream packaging technology for high-end automotive camera housings. It further includes two sub-solidification methods: 45° side laser welding and top (or bottom) vertical laser welding. Existing housings that directly assemble the front and rear shells using laser welding still suffer from several technical drawbacks.

[0006] When using 45° side laser welding to directly butt-weld the front and rear shells, typically one of the front and rear shells is a light-transmitting material and the other is a light-absorbing material. This method has the problem of light entering the module through the light-transmitting material and affecting imaging, requiring the additional fabrication of a light-shielding component to block it, which increases costs and poses certain risks due to optical obstruction. This solution requires matching specific fixtures according to the relevant module dimensions and adds additional costs. Alternatively, both the front and rear shells can be made of light-absorbing materials. A light-transmitting component is added to one of the front or rear shells through secondary injection molding, and then welded to the other light-absorbing component that has not undergone secondary injection molding. This method has the problems of unstable sealing after secondary injection molding and increased costs due to secondary injection molding. Moreover, this solution requires matching specific fixtures according to the relevant module dimensions and adds additional costs.

[0007] When using a top (or bottom) vertical laser welding process, if the welding is done vertically at the top, the front shell is made of light-absorbing material, and a secondary injection-molded light-transmitting component is required before laser welding it to the rear shell, which is also made of light-absorbing material. This requires appropriate structural light-shielding treatment for both the front and rear shells, and the secondary injection molding process introduces issues of sealing instability and increased costs. If the welding is done vertically at the bottom, the light-absorbing material of the front shell is directly welded vertically to the light-transmitting material of the rear shell. This method requires light-shielding treatment and demands precise dimensional accuracy.

[0008] It is evident that a new shell structure and laser welding process are urgently needed to address the shortcomings of the existing technologies. Summary of the Invention

[0009] The technical problem to be solved by the embodiments of the present invention is to provide an in-vehicle camera that can be easily welded and packaged.

[0010] The technical problem to be further solved by the embodiments of the present invention is to provide a packaging method for an in-vehicle camera, which can be conveniently implemented by welding and packaging.

[0011] To address the aforementioned technical problems, as one aspect of the present invention, a vehicle-mounted camera is provided, comprising: The rear shell has an internal cavity and an opening at one end; A front shell that correspondingly covers the opening of the rear shell and is fixedly connected to the rear shell; and The rear shell forms an annular step around the opening. The annular step includes a higher step, a lower step inside the higher step, and a connecting ring surface connecting the higher step and the lower step. The front shell forms an annular welding ring around its periphery. The front shell is placed on the lower step of the annular step with the welding ring. A gap is formed between the outer ring surface of the welding ring and the connecting ring surface. The welding ring and the higher step are partially melted and sealed together by laser welding. The rear shell and the front shell have light-shielding parts to prevent external stray light and laser light during the laser welding process from entering the cavity.

[0012] Furthermore, the outer surface of the front shell has an annular inner overflow groove formed on the inner side of the welding ring, and the rear shell also has an annular outer overflow groove formed on the periphery of the higher-order part. During the laser welding process, the welding ring and the higher-order part are partially melted, and the molten material flows into and fills the inner overflow groove, the gap, and the outer overflow groove.

[0013] Furthermore, the surfaces of both the welding ring and the higher-order portion facing away from the receiving cavity are flush with each other.

[0014] Furthermore, the vehicle-mounted camera also includes a ring-shaped light-transmitting element made of a light-transmitting material. The light-transmitting element is placed on the outside of the front housing and covers the welding ring and the high-order portion. During laser welding, the laser passes through the light-transmitting element and irradiates the welding ring and the high-order portion.

[0015] Furthermore, the vehicle-mounted camera also includes: The lens is located in the middle of the front housing; A circuit board is mounted on the front housing using one of the following methods: active alignment, adhesive bonding, soldering, or screw fixing. When the front housing is assembled onto the rear housing, it is housed within the receiving cavity of the rear housing. The circuit board is equipped with a photosensitive chip and an onboard connector. The photosensitive chip is directly opposite the inner end of the lens, and the photosensitive center point of the photosensitive chip is located at the focal point of the lens. An external connector extends through the rear housing into the receiving cavity and mates with the onboard connector.

[0016] Furthermore, the lens is integrally formed with the front housing, or the lens is pre-assembled on the front housing by means of adhesive bonding or threaded connection, while the circuit board is installed on the front housing by an active alignment process; or, the circuit board is pre-installed on the front housing by means of adhesive bonding, soldering or screw fixing, and the lens is then assembled on the front housing by an active alignment process.

[0017] Furthermore, both the welding ring and the surface of the higher-order portion used to receive laser irradiation are rough surfaces.

[0018] Furthermore, both the rear shell and the front shell are made of the same material, which is an opaque plastic or metal; or, the material is a translucent plastic, and a light-shielding material layer is provided at a predetermined location on the rear shell and the front shell to form the light-shielding part.

[0019] Furthermore, the outer circumferential surface of the welding ring near the internal receiving cavity of the rear shell also forms an inwardly inclined guide slope to guide the welding ring into the annular step.

[0020] On the other hand, embodiments of the present invention also provide a packaging method for an in-vehicle camera based on any one of the above claims, comprising the following steps: The semi-finished product containing the front shell is placed on the lower part of the annular step at the opening of the rear shell by the welded ring around the periphery of the front shell. The semi-finished product and the rear shell are clamped together using a fixture; and The welding ring on the front shell and the higher part of the annular step on the rear shell are irradiated with a laser, causing the welding ring and the higher part to partially melt and seal together as a whole.

[0021] By adopting the above technical solution, the embodiments of the present invention have at least the following beneficial effects: By setting an annular step around the opening of the rear shell, with the higher step of the annular step being closer to the periphery of the opening than the lower step, and a welding ring correspondingly provided around the periphery of the front shell, during assembly, the front shell is placed on the lower step of the annular step with the welding ring, and then the welding ring and the higher step of the annular step are irradiated with a laser, causing the welding ring and the higher step to partially melt and seal together as one unit. Both the welding ring and the higher step of the annular step are directly exposed, eliminating the need for additional light-transmitting parts, which simplifies the welding process. Furthermore, the rear shell and the front shell have light-shielding parts, which not only prevent the laser from penetrating the rear shell or the front shell to irradiate the components inside the receiving cavity during the laser welding process, but also prevent external stray light from entering and affecting the imaging effect during the use of the vehicle-mounted camera. The packaging method provided by the embodiments of the present invention has a simple and efficient packaging process, is easy to implement, and is particularly suitable for automated mass production. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded structural diagram of an optional embodiment of the vehicle-mounted camera of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of an optional embodiment of the vehicle-mounted camera of the present invention before the front shell is placed on the rear shell and is to be welded.

[0025] Figure 3 This is a schematic diagram of the welding process structure of an optional embodiment of the vehicle-mounted camera of the present invention.

[0026] Figure 4 yes Figure 3 A magnified view of part A in the middle.

[0027] Figure 5 This is an exploded structural diagram of another optional embodiment of the vehicle-mounted camera of the present invention.

[0028] Figure 6 This is a schematic diagram of the combined state of another optional embodiment of the vehicle-mounted camera of the present invention.

[0029] Figure 7This is an exploded structural diagram of another optional embodiment of the vehicle-mounted camera of the present invention. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the technical principles and feasible solutions of the present invention, and are not intended to limit the present invention. Moreover, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0031] In the description of this invention, it should be understood that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Please refer to Figures 1 to 7 As shown, an embodiment of the present invention provides a vehicle-mounted camera, including: The rear shell 1 has an internal cavity 10 and an opening 12 at one end; The front shell 3, which corresponds to and covers the opening 12 of the rear shell 1 and is fixedly connected to the rear shell 1; and The rear shell 1 forms an annular step 14 around the opening 12. The annular step 14 includes a higher step 140, a lower step 142 located inside the higher step 140, and a connecting ring surface 144 corresponding to the higher step 140 and the lower step 142. The periphery of the front shell 3 forms an annular welding ring 30. The front shell 3 is placed on the lower step 142 of the annular step 14 with the welding ring 30. A gap 4 is formed between the outer ring surface 300 of the welding ring 30 and the connecting ring surface 144. The welding ring 30 and the higher step 140 are partially melted and sealed together by laser welding. The rear shell 1 and the front shell 3 have light-shielding parts to prevent external stray light and laser L during the laser welding process from entering the cavity 10.

[0034] This invention employs an annular step 14 around the opening 12 of the rear shell 1. The higher step 140 of the annular step 14 is closer to the periphery of the opening 12 than the lower step 142. A welding ring 30 is correspondingly provided around the periphery of the front shell 3. During assembly, the front shell 3 is placed on the lower step 142 of the annular step 14 with the welding ring 30. A laser is then used to irradiate the welding ring 30 and the higher step 140, causing them to partially melt and seal together. Since both the welding ring 30 and the higher step 140 are directly exposed, no additional light-transmitting parts are needed, simplifying the welding process. Furthermore, the rear shell 1 and the front shell 3 have light-shielding parts, ensuring that the laser L does not penetrate the rear shell 1 or the front shell 3 to irradiate the components inside the receiving cavity 10 during laser welding. This also prevents external stray light from affecting the imaging effect during the use of the vehicle-mounted camera.

[0035] In specific implementation, the width of the gap 4 (i.e., the distance between the outer ring surface of the welding ring 30 and the connecting ring surface 144) can be designed to be relatively small (preferably 0.05mm~0.2mm), which is beneficial for the welding ring 30 of the front shell 3 to be assembled onto the annular step 14 of the rear shell 1. Moreover, during the laser welding process, the gap 4 provides flow space for the molten material, so that the molten material can fill the gap 4 and form a reliable sealing connection.

[0036] In an optional embodiment of the present invention, such as Figures 1 to 5 , Figure 7As shown, the outer surface of the front shell 3 has an annular inner overflow groove 32 formed inside the welding ring 30, and the rear shell 1 also has an annular outer overflow groove 16 formed around the higher-level portion 140. During laser welding, both the welding ring 30 and the higher-level portion 140 partially melt, and the molten material flows into and fills the inner overflow groove 32, the gap 4, and the outer overflow groove 16. In this embodiment, by setting the inner overflow groove 32 and the outer overflow groove 16, the molten material overflowing during welding can be effectively collected, avoiding irregular overflow that affects the appearance and sealing performance. At the same time, the molten material filling the gap helps to form a weld, enhancing the sealing effect.

[0037] In an optional embodiment of the present invention, such as Figures 2 to 4 As shown, the surfaces of the welding ring 30 and the higher-level portion 140 facing away from the receiving cavity 10 are flush with each other. This arrangement in this embodiment makes the outer surfaces of the mating parts of the front shell 3 and the rear shell 1 relatively flat before welding, which is beneficial for the corresponding clamps 8 to clamp during welding. It also allows the welding ring 30 and the higher-level portion 140 to melt simultaneously during welding to form a beautiful and high-quality weld. In addition, it is also beneficial for installing components such as the light-transmitting element 6 mentioned later.

[0038] In an optional embodiment of the present invention, such as Figures 5 to 7 As shown, the vehicle-mounted camera also includes a ring-shaped light-transmitting element 6 made of light-transmitting material. The light-transmitting element 6 is placed on the outside of the front shell 3 and covers the welding ring 30 and the high-order part 140. During laser welding, the laser L passes through the light-transmitting element 6 and irradiates the welding ring 30 and the high-order part 140. In this embodiment, by setting the light-transmitting element 6, it is possible for the laser L to pass through the light-transmitting element 6 to reach the welding area, thereby heating and melting the welding ring 30 and the higher-order part 140. On the other hand, it can also effectively restrict the flow of molten material, resulting in a better quality and more aesthetically pleasing weld. In addition, when the laser L heats and welds the welding ring 30 and the higher-order part 140 through the light-transmitting element 6, the light-absorbing surfaces of the welding ring 30 and the higher-order part 140 will be heated and begin to melt first. Moreover, during the welding process, the heat will gradually extend to the adjacent contact surfaces of the light-transmitting element 6, causing the adjacent contact surfaces of the light-transmitting element 6 to also be locally melted. Under the clamping action of the clamp 8, the light-transmitting element 6 will also melt accordingly with the welding ring 30 and the higher-order part 140. After cooling, a better fixing and sealing effect can be achieved.

[0039] In an optional embodiment of the present invention, such as Figure 1 , Figure 3 , Figure 5 and Figure 7 As shown, the vehicle-mounted camera also includes: Lens 5 is located in the middle of the front shell 3; Circuit board 7 is mounted on the front housing 3 by one of the following methods: active alignment, adhesive bonding, soldering, or screw fixing. When the front housing 3 is assembled onto the rear housing 1, it is housed within the receiving cavity 10 of the rear housing 1. Circuit board 7 is provided with a photosensitive chip 70 and an onboard connector 72. The photosensitive chip 70 is directly opposite the inner end of the lens 5, and the photosensitive center point of the photosensitive chip 70 is located at the focal point of the lens 5. An external connector 9 extends through the rear housing 1 into the receiving cavity 10 and mates with the onboard connector 72.

[0040] This embodiment further defines other components of the vehicle-mounted camera. Furthermore, since the circuit board 7 is located within the receiving cavity 10, the components on the circuit board 7 will not be exposed to the laser L during laser welding, thus preventing damage. The onboard connector 72 on the circuit board 7 enables power supply and communication with external systems by mating with the external connector 9.

[0041] In an optional embodiment of the present invention, the lens 5 and the front housing 3 are integrally formed (e.g., Figures 1 to 6 As shown), or the lens 5 is pre-assembled onto the front housing 3 by adhesive bonding or threaded connection, while the circuit board 7 is mounted onto the front housing 3 by active alignment (AA process); or, the circuit board 7 is pre-mounted onto the front housing 3 by adhesive bonding, soldering, or screw fixing, and the lens 5 is then assembled onto the front housing 3 by active alignment process (e.g. Figure 7 (As shown).

[0042] This embodiment specifically defines the assembly method of the lens 5 and circuit board 7 relative to the front housing 3, and provides multiple assembly methods that can be flexibly selected according to actual conditions. For example, when the lens 5 and the front housing 3 are integrally formed, or when the lens 5 is pre-assembled onto the front housing 3 in a suitable manner, the circuit board 7 can then be assembled onto the front housing 3 using an active alignment process. Specifically, after focusing and positioning the circuit board 7 and the front housing 3, adhesive 2 is used to bond and fix them. Alternatively, when the lens 5 and the front housing 3 are separate independent components, and the circuit board 7 is first assembled onto the front housing 3 in a suitable manner, the lens 5 can then be assembled onto the front housing 3 using an active alignment process. With the aid of the AA process, the relative position of the lens 5 and the photosensitive chip 70 can be adjusted in real time during assembly, ensuring a clear image across the entire frame and effectively correcting the mechanical tolerances of each component. It is understandable that, in order to allow light to enter the photosensitive chip 70 through the lens 5, when the lens 5 and the front shell 3 are integrally formed, at least the parts through which the light path passes should be made of a light-transmitting material. For example, the light-transmitting lens 5 and the opaque front shell 3 can be integrally formed by secondary injection molding, or the entire structure can be made of a light-transmitting material, but an opaque light-blocking part can be provided at a predetermined part of the front shell 3. If the lens 5 is assembled onto the front shell 3 by an active alignment process, a through hole 34 for assembling the lens 5 is opened at a corresponding position on the front shell 3.

[0043] In an optional embodiment of the present invention, the surfaces of the welding ring 30 and the higher-order portion 140 used for receiving laser L irradiation are both rough surfaces. In this embodiment, having rough surfaces on the surfaces (i.e., light-absorbing surfaces) of the welding ring 30 and the higher-order portion 140 used for receiving laser L irradiation is beneficial for increasing the light-absorbing area. During laser welding, this allows for efficient absorption of the energy carried by the laser, achieving rapid melting and welding. In specific implementations, structures such as textures can be formed on the corresponding surfaces to increase surface roughness.

[0044] In an optional embodiment of the present invention, both the rear shell 1 and the front shell 3 are made of the same material, which is an opaque plastic or metal; or the material is a translucent plastic, and a light-shielding material layer is further provided at predetermined locations on the rear shell and the front shell to form the light-shielding part. Specifically, plastics such as PPS, PC, ABS, and PBT, or metal materials such as aluminum alloys can be used. Using the same material allows for better fusion after melting and provides a consistent coefficient of thermal expansion, enabling synchronous contraction during the cooling process after laser welding, which helps reduce welding stress and deformation, and improves welding reliability. If the material is opaque, then the entire rear shell 1 and front shell 3 constitute the light-shielding part. In embodiments where the rear shell 1 and the front shell 3 are made of plastic, there is no need to use metal materials, resulting in relatively low costs. If the plastic is translucent, it is only necessary to further provide a light-shielding material layer at predetermined locations, which can still effectively control costs. The predetermined locations specifically refer to the entire cavity wall of the receiving cavity 10 of the rear shell 1 and the portion of the front shell 3 that covers the opening 12, as well as other locations with light-shielding requirements.

[0045] In an optional embodiment of the present invention, such as Figure 4 As shown, the outer annular surface 300 of the welding ring 30 near the internal receiving cavity 10 of the rear shell 1 also forms an inwardly inclined guide slope 302 to guide the welding ring 30 into the annular step 14. This guide slope 302 acts as a guide during assembly, effectively guiding the welding ring 30 smoothly into the lower step 142 of the annular step 14, improving assembly efficiency and accuracy.

[0046] On the other hand, combining Figure 3 As shown, this embodiment of the invention also provides a packaging method for an in-vehicle camera based on any one of the above claims, comprising the following steps: Step S1: Place the semi-finished product containing the front shell 3 on the lower step 142 of the annular step 14 at the opening 12 of the rear shell 1 with the welding ring 30 around the periphery of the front shell 3. Step S2, clamp the semi-finished product and the rear shell 1 using clamp 8; and Step S3: Laser L is used to irradiate the welding ring 30 on the front shell 3 and the higher part 140 of the annular step 14 on the rear shell 1, so that the welding ring 30 and the higher part 140 are partially melted and sealed together as one unit.

[0047] It is understood that in embodiments where the light-transmitting element 6 is not provided, the clamp 8 is directly clamped onto the rear shell 1 and the front shell 3 (e.g., Figure 3 and Figure 4(as shown in the diagram). In embodiments where the light-transmitting element 6 is provided, the clamp 8 can clamp onto the rear shell 1 and the light-transmitting element 6 respectively. Typically, the semi-finished product also includes a lens 5 and a circuit board 7, that is, the front shell 3, lens 5 and circuit board 7 are assembled into a semi-finished product in advance, and then packaged with the rear shell 1.

[0048] The embodiments of the present invention use the above steps to encapsulate the vehicle-mounted camera based on the foregoing embodiments. The encapsulation process is simple, efficient, and easy to implement, and is especially suitable for automated mass production.

[0049] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many variations under the guidance of the present invention without departing from the inventive spirit and scope of protection of the claims. These variations are all within the scope of protection of the present invention.

Claims

1. A vehicle-mounted camera, comprising: The rear shell has an internal cavity and an opening at one end; A front shell that correspondingly covers the opening of the rear shell and is fixedly connected to the rear shell; as well as The rear shell is characterized by forming an annular step around the opening, the annular step including a higher step, a lower step located inside the higher step, and a connecting ring surface corresponding to the higher step and the lower step. The periphery of the front shell forms an annular welding ring, the front shell is placed on the lower step of the annular step with the welding ring, a gap is formed between the outer ring surface of the welding ring and the connecting ring surface, and the welding ring and the higher step are partially melted and sealed together by laser welding process. The rear shell and the front shell have light-shielding parts to prevent external stray light and laser light during the laser welding process from entering the cavity.

2. The vehicle-mounted camera as described in claim 1, characterized in that, The outer surface of the front shell has an annular inner overflow groove formed inside the welding ring, and the rear shell also has an annular outer overflow groove formed around the higher-level part. During the laser welding process, the welding ring and the higher-level part are partially melted, and the molten material flows into and fills the inner overflow groove, the gap, and the outer overflow groove.

3. The vehicle-mounted camera as described in claim 1, characterized in that, The surfaces of the welding ring and the higher-level portion facing away from the receiving cavity are flush with each other.

4. The vehicle-mounted camera as described in claim 1 or 3, characterized in that, The vehicle-mounted camera also includes a ring-shaped light-transmitting element made of a light-transmitting material. The light-transmitting element is placed on the outside of the front housing and covers the welding ring and the high-level part. During laser welding, the laser passes through the light-transmitting element and irradiates the welding ring and the high-level part.

5. The vehicle-mounted camera as described in claim 1, characterized in that, The vehicle-mounted camera also includes: The lens is located in the middle of the front housing; A circuit board is mounted on the front housing and housed within the receiving cavity of the rear housing when the front housing is assembled onto the rear housing. The circuit board is equipped with a photosensitive chip and an onboard connector. The photosensitive chip is directly opposite the inner end of the lens, and the photosensitive center point of the photosensitive chip is located at the focal point of the lens. An external connector extends through the rear housing into the receiving cavity and mates with the onboard connector.

6. The vehicle-mounted camera as described in claim 5, characterized in that, The lens is integrally formed with the front housing, or the lens is pre-assembled on the front housing by means of adhesive bonding or threaded connection, and the circuit board is installed on the front housing by an active alignment process; or, the circuit board is pre-installed on the front housing by means of adhesive bonding, soldering or screw fixing, and the lens is then assembled on the front housing by an active alignment process.

7. The vehicle-mounted camera as described in claim 1, characterized in that, Both the welding ring and the surface of the higher-order portion that are used to receive laser irradiation are rough surfaces.

8. The vehicle-mounted camera as described in claim 1, characterized in that, Both the rear shell and the front shell are made of the same material, which is opaque plastic or metal; or, the material is translucent plastic, and a light-shielding material layer is provided at a predetermined location on the rear shell and the front shell to form the light-shielding part.

9. The vehicle-mounted camera as described in claim 1, characterized in that, The outer ring surface of the welding ring, near the internal cavity of the rear shell, also forms an inwardly inclined guide slope to guide the welding ring into the annular step.

10. A packaging method for an in-vehicle camera according to any one of claims 1-9, characterized in that, Includes the following steps: The semi-finished product containing the front shell is placed on the lower part of the annular step at the opening of the rear shell by the welded ring around the periphery of the front shell. The semi-finished product and the rear shell are clamped together using a fixture; and The welding ring on the front shell and the higher part of the annular step on the rear shell are irradiated with a laser, causing the welding ring and the higher part to partially melt and seal together as a whole.

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