A vehicle-mounted camera module

Abstract

The utility model relates to a kind of vehicle-mounted camera modules, including lens front shell assembly, circuit board and heat dissipation conductive block;The heat dissipation conductive block is located between the lens front shell assembly and the circuit board;Wherein, the lens front shell assembly and the circuit board are connected by fastener to the heat dissipation conductive block clamping, the opposite two sides of the heat dissipation conductive block respectively with the lens front shell assembly and the circuit board are in contact with each other.The utility model fills the gap between lens front shell assembly and circuit board by heat dissipation conductive block, can effectively prevent the sputtering impurities and volatile produced when welding fall on the components and parts of lens and circuit board, while, heat and electrostatic on circuit board can also be conducted to lens front shell assembly, improve module heat dissipation performance and ESD performance, safety and reliability are high.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, and more specifically, to a vehicle-mounted camera module. Background Technology

[0002] AA, or Auto Adjustment or Auto Alignment, refers to the high-precision automatic adjustment and calibration of the relative position between the lens and image sensor during the assembly of a camera module to achieve optimal focusing and image quality. After alignment, fixing is performed to ensure that the lens and image sensor are always in the optimal position. Traditionally, AA is used with adhesive dispensing for alignment and fixing. However, due to the difficulty in ensuring dispensing accuracy, problems such as uneven adhesive application and positional misalignment can occur, affecting the optical performance and structural stability of the camera. Furthermore, the long curing time of adhesive dispensing leads to low production efficiency, making it difficult to meet the needs of large-scale mass production. Therefore, AA with laser soldering is now commonly used. Compared to the traditional AA with adhesive dispensing process, laser soldering AA significantly reduces manufacturing time and increases production capacity because it eliminates the adhesive curing step. Laser soldering is also highly precise, fast, and accurate, resulting in a high first-pass yield and guaranteed delivery quality. At the same time, thanks to highly automated production, it saves a lot of manpower and optimizes costs.

[0003] Currently, in the AA+ laser soldering process, copper pillars are usually set on the housing containing the lens, and corresponding soldering holes are set on the circuit board. After the copper pillars are inserted into the soldering holes, the lens and the circuit board are adjusted to the most suitable relative position through the AA process. Then, the solder ring is put on the copper pillars, and then the copper pillars and soldering holes are fixed by laser soldering. Finally, the back cover and lens are fixedly installed to complete the assembly of the camera module. However, the above method has the following problems: First, the circuit board and lens are only fixed by welding a few copper pillars, resulting in a small contact area. The heat on the circuit board cannot be dissipated quickly, and the overall heat dissipation of the module is poor. At the same time, the small conductive area due to the copper pillars means that static electricity on the circuit board cannot be released quickly, affecting the ESD performance of the module and posing a risk of functional failure. Second, because the copper pillars have a certain length, there is a large gap between the circuit board and the lens after they are fitted together. During the laser welding process, the laser beam concentrates energy to locally heat the solder to a temperature far above its boiling point in a very short time. The solder undergoes violent vaporization and expansion at the moment of melting, resulting in sputtering. At the same time, some low-boiling-point elements in the solder (such as zinc (Zn), tin (Sn), lead (Pb), silver (Ag), etc.) vaporize at high temperatures and volatilize from the surface of the molten metal. These sputtered impurities and volatiles can easily pass through the gap between the circuit board and the lens and adhere to the surface of high-precision and high-sensitivity components such as the lens and image sensor, causing dirt and other problems, which will affect their performance and seriously affect the quality of the product. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an in-vehicle camera module to solve the problems existing in the background art.

[0005] The objective of this utility model is achieved through the following technical solution.

[0006] A vehicle-mounted camera module includes: a lens front housing assembly; a circuit board; and a heat dissipation conductive block located between the lens front housing assembly and the circuit board; wherein the lens front housing assembly and the circuit board are connected by fasteners to clamp the heat dissipation conductive block, and the opposite sides of the heat dissipation conductive block abut against the lens front housing assembly and the circuit board respectively.

[0007] In the above solution, the lens front housing assembly and the circuit board are assembled using the AA (Alignment and Assembly) process. First, the lens front housing assembly, the heat dissipation conductive block, and the circuit board are arranged in sequence and aligned using the AA process. Then, fasteners are used to fix the lens front housing assembly and the circuit board, clamping the heat dissipation conductive block between them. Because the heat dissipation conductive block fills the gap between the lens front housing assembly and the circuit board, a sealing effect is created, effectively preventing sputtering impurities and volatiles generated during soldering from falling onto the components of the lens and circuit board, thus avoiding impact on the camera module's performance and improving product yield. Furthermore, the heat dissipation conductive block has excellent thermal and electrical conductivity. Its opposite sides contact the lens front housing assembly and the circuit board respectively. During operation, it can quickly conduct heat generated by the circuit board to the surface of the lens front housing assembly, where it is dissipated, preventing heat buildup and effectively improving the heat dissipation performance of the camera module. In addition, by utilizing the conductivity of the heat dissipation conductive block, the conductive area between the circuit board and the lens front housing assembly can be increased, which is beneficial for quickly conducting static electricity on the circuit board to the surface of the lens front housing, reducing the risk of components on the circuit board being damaged by electrostatic discharge, improving the ESD performance of the module, and enhancing safety and reliability.

[0008] In one example of this utility model, the heat dissipation conductive block is a flexible structure with elasticity, so that the heat dissipation conductive block forms an interference seal with the lens front shell assembly and the circuit board.

[0009] In the above solution, because the heat dissipation conductive block is a flexible structure, the pressure applied by the lens front housing assembly and the circuit board when clamping the heat dissipation conductive block causes it to undergo elastic deformation, forming an interference seal effect. This makes the contact between the heat dissipation conductive block and the lens front housing assembly and the circuit board more compact and reliable. While ensuring the sealing effect, it effectively improves the heat conduction efficiency and electrostatic conduction effect, enhancing the module's heat dissipation effect and ESD performance. In addition, the flexible material can undergo elastic deformation without rigid constraints. During the AA assembly process, it will not interfere with the fine-tuning work when aligning the lens front housing assembly and the circuit board, thus avoiding affecting the alignment accuracy.

[0010] In one example of this utility model, the heat dissipation conductive block has a light outlet, and the circuit board is provided with an image sensor. The projection of the image sensor on the heat dissipation conductive block is located within the light outlet.

[0011] In the above scheme, the light outlet is used for the image sensor to receive light passing through the lens front housing assembly, preventing the light path from being blocked, so as to ensure the normal functioning of the module.

[0012] In one example of this utility model, a contact ring is formed by protruding outward on one side surface of the heat dissipation conductive block. The contact ring is arranged around the light outlet, and the end face of the contact ring abuts against the surface of the circuit board.

[0013] In the above solution, the contact ring protrudes from the surface of the heat dissipation conductive block to ensure reliable contact with the circuit board, guaranteeing efficient heat conduction and electrostatic discharge. Simultaneously, by setting the contact ring, while ensuring contact with the circuit board, it allows space for components on the circuit board, preventing damage from large-area contact. Furthermore, the contact ring surrounds the light outlet, thus enclosing the image sensor internally. The contact ring forms a light-shielding barrier, mitigating interference from stray light from the sides, thereby improving the module's imaging quality in complex lighting environments.

[0014] In one example of this utility model, the surface of the circuit board is provided with several exposed copper areas, and the end face of the contact ring abuts against the exposed copper areas.

[0015] In the above solution, the exposed copper area is located on the circuit board at the position where it contacts the contact ring. The exposed copper area exposes the copper layer of the circuit board, allowing it to contact the contact ring of the heat dissipation conductive block. By utilizing the high thermal conductivity and high electrical conductivity of copper, the thermal resistance and contact resistance are significantly reduced, the heat conduction efficiency and electrostatic conduction effect are improved, and the heat dissipation effect and ESD performance of the module are enhanced.

[0016] In one example of this utility model, a mounting groove with the same shape as the heat dissipation conductive block is formed on the end face of the lens front housing assembly. The size of the mounting groove is smaller than the size of the heat dissipation conductive block, and the heat dissipation conductive block abuts against the end face portion surrounding the mounting groove.

[0017] In the above solution, the mounting groove and the heat dissipation conductive block have the same shape, but the overall size is smaller than the heat dissipation conductive block. This allows the heat dissipation conductive block to contact the part of the lens front housing assembly end face located around the mounting groove, forming an annular contact surface. Compared with the contact method of a large-area flat surface, the contact pressure can be more concentrated and the fit can be tighter to improve the sealing performance. At the same time, it can also ensure the effect of heat conduction and electrostatic conduction.

[0018] In one example of this utility model, the fastener includes a plurality of fixing posts, which are disposed on the front lens housing assembly. Fixing holes are formed on the circuit board at positions corresponding to the fixing posts. The fixing posts are inserted into and fixedly installed in the fixing holes. A welding ring is sleeved on the fixing post, and the welding ring is located at the mating point between the fixing post and the fixing hole.

[0019] In the above scheme, the lens front housing assembly and the circuit board are connected by matching fixing posts and fixing holes, and a welding connection is formed by the welding ring on the fixing post. In specific assembly, the lens front housing assembly, heat dissipation conductive block and circuit board are assembled in sequence. Then, the fixing post on the lens front housing assembly is inserted into the fixing hole on the circuit board. The lens front housing assembly and circuit board are adjusted to the appropriate position by the AA process. Then, the welding ring is put on the fixing post. The welding ring is melted by laser. After it solidifies and cools, a stable connection between the fixing post and the fixing hole can be achieved. At this time, the heat dissipation conductive block is clamped between the lens front housing assembly and the circuit board to contact the lens front housing assembly and the circuit board respectively.

[0020] In one example of this utility model, a positioning ring is sleeved on the fixed column, and a positioning groove corresponding to and cooperating with the positioning ring is provided on the heat dissipation and conductive block.

[0021] In the above solution, by setting a positioning ring and a positioning groove, the heat dissipation conductive block and the lens front shell assembly can be quickly positioned and aligned during assembly, simplifying the installation work.

[0022] In one example of this utility model, a rear housing is also included, which cooperates with the lens front housing assembly to form a receiving cavity.

[0023] In the above solution, the rear shell and the front shell assembly of the lens can be combined to form a closed cavity for accommodating the heat dissipation conductive block and the circuit board, so as to protect the precision components.

[0024] In one example of this utility model, the rear shell is provided with a hollow connection channel, and the circuit board is provided with a connector, which is located inside the connection channel.

[0025] In the above solution, the connector is used to connect external devices to this module. The connection channel is hollow inside and open at both ends. The connector is located inside the connection channel to connect with external devices.

[0026] As can be seen from the above, the beneficial effects of this utility model are as follows: This invention utilizes a heat-dissipating conductive block to fill the gap between the lens front housing assembly and the circuit board, achieving a sealing effect. This effectively prevents sputtering impurities and volatiles generated during soldering from falling onto the components of the lens and circuit board, thus avoiding impact on the camera module's performance and improving product yield. Simultaneously, the thermal conductivity of the heat-dissipating conductive block rapidly conducts heat generated during circuit board operation to the surface of the lens front housing assembly, where it is dissipated, accelerating heat dissipation and improving the camera module's heat dissipation performance. Furthermore, the conductivity of the heat-dissipating conductive block increases the conductive area between the circuit board and the lens front housing assembly, facilitating the rapid conduction of static electricity from the circuit board to the lens front housing surface. This reduces the risk of electrostatic discharge (ESD) damage to components on the circuit board, improving the module's ESD performance and enhancing safety and reliability. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is an exploded view of the vehicle-mounted camera module of Example 1.

[0029] Figure 2 This is a front view of the vehicle-mounted camera module.

[0030] Figure 3 This is a cross-sectional view of an in-vehicle camera module.

[0031] Figure 4 This is a front view of the vehicle camera module (after removing the back cover).

[0032] Figure 5 This is a 3D view of the circuit board.

[0033] Figure 6 This is a schematic diagram showing the fit between the lens front housing assembly and the heat dissipation conductive block.

[0034] Explanation of the reference numerals in the figure: 1-Lens front housing assembly; 11-Lens section; 12-Front housing section; 121-Fixing post; 122-Positioning ring; 123-Mounting groove; 2-Heat dissipation conductive block; 21-Light outlet; 22-Contact ring; 23-Positioning groove; 3-Circuit board; 31-Fixing hole; 32-Image sensor; 33-Exposed copper area; 34-Connector; 4-Solder ring; 5-Rear housing; 51-Connection channel. Detailed Implementation

[0035] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Example 1

[0036] Please refer to Figures 1 to 6 In a preferred embodiment, this embodiment provides an automotive camera module based on solder AA process, which includes a lens front housing assembly 1, a circuit board 3, and a heat dissipation conductive block 2. The lens front housing assembly 1 includes three fixing posts 121; the circuit board 3 has three fixing holes 31, which are correspondingly arranged with the fixing posts 121; the heat dissipation conductive block 2 is located between the lens front housing assembly 1 and the circuit board 3; wherein, the fixing posts 121 are inserted into and fixedly installed in the fixing holes 31, so that the lens front housing assembly 1 and the circuit board 3 clamp the heat dissipation conductive block 2, and the opposite two sides of the heat dissipation conductive block 2 abut against the lens front housing assembly 1 and the circuit board 3 respectively.

[0037] It is understood that the fastener in this embodiment is a fixing post 121. The circuit board 3 is provided with a fixing hole 31 that corresponds to and cooperates with the fixing post 121. After the fixing post 121 is inserted into the fixing hole 31, the joint between the fixing post 121 and the fixing hole 31 is fixed by laser welding so that the lens front shell assembly 1 and the circuit board 3 clamp the heat dissipation conductive block 2.

[0038] Specifically, the lens front housing assembly 1 and the circuit board 3 are assembled using the AA process. First, the lens front housing assembly 1, the heat dissipation conductive block 2, and the circuit board 3 are arranged in sequence. Then, the fixing post 121 on the lens front housing assembly 1 is inserted into the fixing hole 31 on the circuit board 3. The lens front housing assembly 1 and the circuit board 3 are adjusted to the appropriate position using the AA process. Then, the fixing post 121 and the fixing hole 31 are welded together to fix them, so that the heat dissipation conductive block 2 is clamped between the lens front housing assembly 1 and the circuit board 3. During the welding process, because the heat dissipation conductive block 2 fills the gap between the lens front housing assembly 1 and the circuit board 3, a sealing effect is formed, which can effectively prevent sputtering impurities and volatiles generated during welding from falling on the components of the lens and the circuit board 3, avoiding affecting the performance of the camera module and improving the product yield. Furthermore, the heat dissipation conductive block 2 possesses excellent thermal and electrical conductivity. Its opposite sides contact the lens front housing assembly 1 and the circuit board 3, respectively. During operation, it rapidly conducts heat generated by the circuit board 3 to the surface of the lens front housing assembly 1, where it dissipates, preventing heat buildup and effectively improving the heat dissipation performance of the camera module. Additionally, the conductivity of the heat dissipation conductive block 2 increases the conductive area between the circuit board 3 and the lens front housing assembly 1, facilitating the rapid conduction of static electricity from the circuit board 3 to the lens front housing surface. This reduces the risk of electrostatic discharge (ESD) damage to components on the circuit board 3, improves the module's ESD performance, and enhances safety and reliability.

[0039] Among them, the heat dissipation conductive block 2 is a flexible structure with elasticity, so that the heat dissipation conductive block 2 forms an interference seal with the lens front shell assembly 1 and the circuit board 3.

[0040] It should be noted that, because the heat dissipation conductive block 2 is a flexible structure, the pressure applied by the lens front housing assembly 1 and the circuit board 3 to the heat dissipation conductive block 2 when they clamp it can cause the heat dissipation conductive block 2 to undergo elastic deformation, thereby forming an interference seal effect. This makes the contact and fit between the heat dissipation conductive block 2 and the lens front housing assembly 1 and the circuit board 3 tighter and more reliable. While ensuring the sealing effect, it effectively improves the heat conduction efficiency and electrostatic conduction effect, and enhances the heat dissipation effect and ESD performance of the module. In addition, the flexible material can undergo elastic deformation without rigid constraints. During the AA assembly process, it will not interfere with the fine-tuning work when aligning the lens front housing assembly 1 and the circuit board 3, so as not to affect the alignment accuracy.

[0041] Preferably, the heat dissipation conductive block 2 is made of silicone doped with high thermal conductivity metal powder, which is processed by integral molding and has excellent thermal and electrical conductivity. Alternatively, foam filled with conductive filler, or other flexible materials that meet thermal and electrical conductivity requirements can also be used to achieve the same technical effect; the choice can be made according to actual needs.

[0042] Please refer to Figures 1 to 5 The heat dissipation conductive block 2 has a light outlet 21, and the circuit board 3 is equipped with an image sensor 32. The projection of the image sensor 32 on the heat dissipation conductive block 2 is located inside the light outlet 21. The light outlet 21 is used for the image sensor 32 to receive light passing through the lens front housing assembly 1, preventing the light path from being blocked, so as to ensure the normal functioning of the module.

[0043] Please refer to Figures 1 to 6 A contact ring 22 is formed by protruding outward on one side surface of the heat dissipation conductive block 2. The contact ring 22 is arranged around the light outlet 21, and the end face of the contact ring 22 abuts against the surface of the circuit board 3.

[0044] The contact ring 22 protrudes from the surface of the heat dissipation conductive block 2 to ensure reliable contact with the circuit board 3, guaranteeing efficient heat conduction and electrostatic discharge. Simultaneously, by setting the contact ring 22, while ensuring contact with the circuit board 3, it allows space for components on the circuit board 3, preventing damage from large-area contact. Furthermore, the contact ring 22 surrounds the light outlet 21, thus enclosing the image sensor 32 internally. The contact ring 22 forms a light-shielding barrier, mitigating interference from stray light from the sides on the image sensor 32, thereby improving the imaging quality of the module in complex lighting environments.

[0045] Please refer to Figure 5 The surface of the circuit board 3 has several exposed copper areas 33, and the end face of the contact ring 22 abuts against the exposed copper areas 33. The exposed copper areas 33 are located on the circuit board 3 at the positions where they contact the contact ring 22. The exposed copper areas 33 expose the copper layer of the circuit board 3, allowing it to contact the contact ring 22 of the heat dissipation conductive block 2. By utilizing the high thermal conductivity and high electrical conductivity of copper, the contact thermal resistance and contact resistance are significantly reduced, improving the heat conduction efficiency and electrostatic conduction effect, which is beneficial to improving the heat dissipation effect and ESD performance of the module.

[0046] Please refer to Figures 1 to 4 The lens front housing assembly 1 includes a lens section 11 and a front housing section 12. A mounting groove 123 and a fixing post 121 are both located on the front housing section 12. The lens section 11 and the front housing section 12 can be an integral structure or a separate structure. A separate structure can be connected by screws or other means, depending on actual needs. One end of the lens section 11 is located inside the front housing section 12, and the other end is located outside. Light enters through the outer end of the lens section 11 and then reaches the image sensor 32 on the circuit board 3 through the light exit port 21.

[0047] Preferably, the lens front housing assembly 1, except for the lens surface, is mainly made of metal. Metal has high thermal conductivity and fast heat dissipation, which helps to quickly dissipate the heat conducted from the circuit board 3, improving the module's heat dissipation performance. At the same time, the metal material is electrically charged, so it can receive static electricity from the circuit board 3 and release it, improving the module's ESD performance and enhancing safety and reliability.

[0048] Please refer to Figure 1 and Figure 6 The lens front housing assembly 1 has a mounting groove 123 with the same shape as the heat dissipation conductive block 2 on its end face. The size of the mounting groove 123 is smaller than the size of the heat dissipation conductive block 2. The heat dissipation conductive block 2 abuts against the end face portion surrounding the mounting groove 123.

[0049] Specifically, the mounting groove 123 has the same shape as the heat dissipation conductive block 2, but its overall size is smaller than that of the heat dissipation conductive block 2 (i.e., the shape and outline of the heat dissipation conductive block 2 are reduced). This allows the heat dissipation conductive block 2 to contact the portion of the end face of the lens front housing assembly 1 located around the mounting groove 123, forming an annular contact surface. Compared to a large-area flat contact method, this allows for more concentrated contact pressure and a tighter fit, improving sealing performance. Simultaneously, it ensures effective heat conduction and electrostatic conduction. Furthermore, by setting the mounting groove 123 and the heat dissipation conductive block 2 to have the same shape, assembly can be performed based on the shape, facilitating the positioning and alignment of the heat dissipation conductive block 2 and simplifying assembly complexity.

[0050] It should be noted that if the mounting groove 123 with the same shape as the heat dissipation conductive block 2 is not provided, the end face of the heat dissipation conductive block 2 and the lens front housing assembly 1 will become a large-area planar contact. The contact pressure between the flexible heat dissipation conductive block 2 and the end face of the lens front housing assembly 1 is easily dispersed, which may result in local "virtual contact", affecting the sealing performance, as well as the effect of heat conduction and electrostatic conduction.

[0051] Please refer to Figures 1 to 6 A welding ring 4 is fitted onto the fixing post 121, and the welding ring 4 is located at the mating point between the fixing post 121 and the fixing hole 31. After the fixing post 121 of the lens front housing assembly 1 is inserted into and aligned with the fixing hole 31 on the circuit board 3, the welding ring 4 is fitted onto the fixing post 121 and moved to the mating point between the fixing post 121 and the fixing hole 31. Then, the welding ring 4 is melted by laser. After it solidifies and cools, a stable connection between the fixing post 121 and the fixing hole 31 is achieved.

[0052] Preferably, the welding ring 4 is made of tin.

[0053] Preferably, the fixing post 121 is made of copper. After the fixing post 121 is welded to the fixing hole 31, the heat on the circuit board 3 can be conducted to the metal surface of the lens front shell assembly 1 through the solder ring 4 and the fixing post 121, which helps to dissipate the heat on the circuit board 3 and further improve the heat dissipation performance of the module.

[0054] Please refer to Figure 6 A positioning ring 122 is fitted onto the fixing post 121, and a positioning groove 23 is provided on the heat dissipation conductive block 2 that corresponds to and cooperates with the positioning ring 122. By setting the positioning ring 122 and the positioning groove 23, the heat dissipation conductive block 2 and the lens front shell assembly 1 can be quickly positioned and aligned during assembly, simplifying the installation work.

[0055] Preferably, the fixing posts 121 are distributed around the mounting groove 123, and correspondingly, the positioning groove 23 is located at the edge of the heat dissipation conductive block 2 to avoid the need to drill holes in the heat dissipation conductive block 2.

[0056] Please refer to Figures 1 to 3 The camera module also includes a rear shell 5, which cooperates with the front lens shell assembly 1 to form a receiving cavity. The rear shell 5 cooperates with the front shell portion 12 of the front lens shell assembly 1 to form a closed receiving cavity for accommodating the heat dissipation conductive block 2 and the circuit board 3, thereby protecting the precision components inside the module.

[0057] Specifically, the rear shell 5 and the front shell 12 are connected by welding. The welding method provides a stable connection, is simple to process, and can effectively ensure sealing.

[0058] Furthermore, the rear shell 5 is provided with a hollow connection channel 51, and the circuit board 3 is provided with a connector 34, which is located inside the connection channel 51. The connector 34 is used to provide an electrical connection between an external device and the internal circuit board 3 to achieve connection with the camera module. The connection channel 51 is hollow inside and open at both ends. The connector 34 is inserted into the connection channel 51 through the opening at one end. The interface end of the external device can extend into the connection channel 51 through the other end of the connection channel 51 to mate with the connector 34, thereby realizing the electrical connection between the camera module and the external device.

[0059] In this implementation, by setting up a heat-dissipating conductive block 2, the gap between the lens front housing assembly 1 and the circuit board 3 is filled, achieving a sealing effect. This effectively prevents sputtering impurities and volatiles generated during soldering from falling onto the components of the lens and circuit board 3, avoiding impact on the performance of the camera module and improving product yield. Simultaneously, utilizing the thermal conductivity of the heat-dissipating conductive block 2, the heat generated during the operation of the circuit board 3 can be quickly conducted to the surface of the lens front housing assembly 1, and then dissipated through the lens front housing assembly 1, accelerating heat dissipation and improving the heat dissipation performance of the camera module. Furthermore, utilizing the conductivity of the heat-dissipating conductive block 2 increases the conductive area between the circuit board 3 and the lens front housing assembly 1, facilitating the rapid conduction of static electricity on the circuit board 3 to the surface of the lens front housing, reducing the risk of electrostatic discharge (ESD) damage to components on the circuit board 3, improving the ESD performance of the module, and enhancing safety and reliability. Example 2

[0060] This embodiment provides an assembly process applicable to the assembly of the vehicle-mounted camera module described in Embodiment 1, specifically including the following steps: S1: Fix the front lens housing assembly 1 onto the fixture, and then assemble the heat dissipation conductive block 2 onto the end face of the front lens housing assembly 1. S2: Align the fixing holes 31 on the circuit board 3 with the fixing post 121 for assembly. Through the AA process, adjust the circuit board 3 and the lens front shell assembly 1 to the most suitable relative position and fix them. At the same time, the equipment puts the welding ring 4 into the fixing post 121, then starts the laser to melt the welding ring 4 and waits for it to cool and solidify. S3: Align and assemble the back cover 5 with the components formed in the previous process, and then use a laser to weld a ring around the part where the front lens cover assembly 1 and the back cover 5 come into contact, so that the back cover 5 and the front lens cover assembly 1 are fused and fixed, thus completing the assembly of the camera module.

[0061] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] Furthermore, 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 utility model according to the specific circumstances.

[0063] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle-mounted camera module, characterized in that, include: Lens front housing assembly; Circuit board; A heat dissipation conductive block is located between the lens front housing assembly and the circuit board; The lens front housing assembly and the circuit board are connected by fasteners to clamp the heat dissipation conductive block, and the opposite sides of the heat dissipation conductive block abut against the lens front housing assembly and the circuit board, respectively.

2. The vehicle-mounted camera module according to claim 1, characterized in that, The heat dissipation conductive block is a flexible structure with elasticity, so that the heat dissipation conductive block forms an interference seal with the lens front shell assembly and the circuit board.

3. The vehicle-mounted camera module according to claim 1, characterized in that, The heat dissipation conductive block has a light outlet, and the circuit board is equipped with an image sensor. The projection of the image sensor on the heat dissipation conductive block is located within the light outlet.

4. The vehicle-mounted camera module according to claim 3, characterized in that, One side surface of the heat dissipation conductive block protrudes outward to form a contact ring, which surrounds the light outlet, and the end face of the contact ring abuts against the surface of the circuit board.

5. The vehicle-mounted camera module according to claim 4, characterized in that, The surface of the circuit board has several exposed copper areas, and the end face of the contact ring abuts against the exposed copper areas.

6. The vehicle-mounted camera module according to claim 1, characterized in that, The end face of the lens front housing assembly has a mounting groove with the same shape as the heat dissipation conductive block. The size of the mounting groove is smaller than the size of the heat dissipation conductive block, and the heat dissipation conductive block abuts against the end face portion surrounding the mounting groove.

7. The vehicle-mounted camera module according to claim 1, characterized in that, The fastener includes a plurality of fixing posts, which are disposed on the front lens housing assembly. Fixing holes are formed on the circuit board at positions corresponding to the fixing posts, and the fixing posts are inserted into and fixedly installed in the fixing holes. A welding ring is fitted onto the fixing post, and the welding ring is located at the mating point between the fixing post and the fixing hole.

8. The vehicle-mounted camera module according to claim 7, characterized in that, A positioning ring is fitted onto the fixed column, and a positioning groove is provided on the heat dissipation and conductive block that corresponds to and cooperates with the positioning ring.

9. The vehicle-mounted camera module according to claim 1, characterized in that, It also includes a rear housing, which cooperates with the front lens housing assembly to form a receiving cavity.

10. The vehicle-mounted camera module according to claim 9, characterized in that, The rear shell has a hollow connection channel, and the circuit board has a connector located inside the connection channel.

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