Vehicle-mounted camera and mounting method

Abstract

The present invention relates to the technical field of cameras. Disclosed are a vehicle-mounted camera and a mounting method. The vehicle-mounted camera comprises a front shell and a rear shell, which are fixed to each other by means of welding, wherein a mounting space is formed between the front shell and the rear shell; a circuit board is provided in the mounting space; several structural members are fixedly connected to the side of the front shell that is close to the circuit board; several avoidance holes are provided in the circuit board, and each avoidance hole is configured such that the corresponding structural member passes therethrough with a gap formed between the avoidance hole and the corresponding structural member; and several to-be-melted members with preset thermal conductivity coefficients are provided on the side of the circuit board that is away from the front shell, each to-be-melted member is arranged on the outer side wall of the corresponding structural member, each to-be-melted member is heated, each melted to-be-melted member is made to fill part of the gap between the corresponding structural member and avoidance hole, and the melted to-be-melted members are then cooled down again so as to fixedly connect the structural members to the circuit board. Heat from the front shell can be transferred by the to-be-melted members when the front shell is welded to the rear shell, such that the temperature of the entire to-be-melted members is relatively balanced, thereby making the to-be-melted members maintain stable and stably connect the structural members to the circuit board.

Description

Vehicle-mounted camera and installation method Technical Field

[0001] The present application relates to the field of camera technology, and in particular to a vehicle-mounted camera and an installation method thereof. Background Art

[0002] As the pixels of automotive cameras become higher and higher, the power consumption of cameras is also increasing, and the requirements for heat dissipation are also gradually increasing. Plastic shells can no longer meet the heat dissipation needs, and various module manufacturers have adopted aluminum alloy shells to cope with it.

[0003] Currently, there is an on-board camera in the prior art, which includes a front shell and a rear shell made of aluminum alloy, which are fixed together by welding. The front shell and the rear shell form an installation space between the front shell and the rear shell, and a circuit board is installed in the installation space by glue. However, during actual measurement, it was found that when welding the front shell and the rear shell, due to the melting point of the metal being above 600°C and the thermal conductivity of the aluminum alloy being 237 (W / (m·K), the heat generated by the welding will be quickly transferred to the glue. The main component of the glue is epoxy resin, and the thermal conductivity is less than 1 (W / (m·K). The heat of the aluminum alloy cannot be transferred to the glue, causing the temperature of the side of the glue away from the circuit board to rise, thereby causing deformation or even melting of that side, and ultimately affecting the stability of the circuit board in the installation space.

[0004] Therefore, there is an urgent need for a technology that can keep the circuit board stably installed in the installation space.

[0005] Summary of the Invention

[0006] The present application provides a vehicle-mounted camera and an installation method, which can solve the problem of unstable installation of a circuit board in an installation space in the prior art.

[0007] To solve one or more of the above technical problems, the technical solutions adopted in this application are:

[0008] In a first aspect, the present application provides a vehicle-mounted camera, comprising a front housing and a rear housing, the front housing and the rear housing being fixed by welding, an installation space being formed between the front housing and the rear housing, a circuit board being provided in the installation space, a plurality of structural members being fixedly connected to a side of the front housing close to the circuit board, the circuit board being provided with a plurality of clearance holes, each of the clearance holes being used to pass through a gap between corresponding structural members;

[0009] A plurality of to-be-melted parts with a preset thermal conductivity are provided on a side of the circuit board away from the front shell, and each of the to-be-melted parts is provided on an outer side wall of a corresponding structural member;

[0010] In the first state, all the parts to be melted are heated and melted and partially enter the corresponding clearance holes to fill the gaps between the corresponding structural parts and the clearance holes;

[0011] In the second state, the melted component to be melted cools and solidifies to fixedly connect the corresponding structural component and the circuit board.

[0012] Furthermore, the part to be melted is a single component, which is sleeved on the outer side wall of the corresponding structural part after the structural part is installed in the clearance hole.

[0013] Furthermore, the part to be melted is obtained by molding or winding.

[0014] Furthermore, the structural member is connected to the front shell by riveting or threading.

[0015] Furthermore, the to-be-melted component is in a circular ring shape before being heated and melted and is sleeved on the outer side wall of the corresponding structural component.

[0016] Furthermore, a metal coating is provided at the position where the workpiece to be melted contacts the circuit board and in the clearance hole. Furthermore, an inner side wall of the workpiece to be melted contacts the outer side wall of the structural component.

[0017] Furthermore, the thermal conductivity ratio between the front shell and the workpiece to be melted is greater than 1 and less than 4.

[0018] Furthermore, a first annular groove is formed on the end edge of the front shell close to the rear shell, and a second annular groove is formed on the end edge of the rear shell close to the front shell, and a reserved space is formed between the first annular groove and the second annular groove.

[0019] Furthermore, the composition of the part to be melted includes one of the metals with a melting point lower than 240°C.

[0020] In a second aspect, the present application also provides a method for installing a vehicle-mounted camera, comprising:

[0021] Step 1: Fixing and installing several structural components in the front shell;

[0022] Step 2: placing the circuit board in the installation space formed by the front shell and the rear shell, and respectively passing through all the clearance holes on the circuit board with one of the structural members, and placing the to-be-melted component with a preset thermal conductivity coefficient on the outer side wall of each of the structural members;

[0023] Step 3: heating the workpiece to be melted for a first preset time so that it melts and partially enters the clearance hole;

[0024] Step 4: Cooling the melted component to be melted for a second preset time to securely connect the structural component and the circuit board;

[0025] Step 5: Assemble the front shell and the rear shell, and weld the front shell and the rear shell.

[0026] Furthermore, after all the clearance holes on the circuit board are respectively provided with a structural member, the outer wall of each structural member is then covered with the to-be-melted component with a preset thermal conductivity coefficient.

[0027] Furthermore, the method of heating the workpiece to be melted includes non-contact heating, and the non-contact heating includes laser irradiation.

[0028] Furthermore, the installation method further includes:

[0029] Before assembling the front shell and the rear shell, the oxide layer at the welding position of the front shell and the rear shell is removed.

[0030] Furthermore, after completing step 2, the circuit board and the front shell including the lens are focused, and after the focusing is completed, step 3 is performed.

[0031] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0032] By first fixing the structural member to the front shell, and then passing the structural member through the circuit board through the clearance hole, and placing a to-be-melted part with a preset thermal conductivity coefficient on the side of the circuit board away from the front shell, the to-be-melted part is heated so that the melted to-be-melted part partially enters the clearance hole to fill the corresponding gap between the structural member and the clearance hole, and then cooling the melted to-be-melted part to fix the connection between the structural member and the circuit board, so that the to-be-melted part can transfer the heat of the front shell when welding the front shell and the rear shell, and maintain a relatively balanced temperature at various locations of the to-be-melted part, thereby keeping the to-be-melted part stable, and stably connecting the structural member and the circuit board, so that the circuit board is stably installed in the installation space;

[0033] Furthermore, a first annular groove is formed on the edge of the end of the front shell close to the rear shell, and a second annular groove is formed on the edge of the end of the rear shell close to the front shell. After the front shell and the rear shell are bonded together, a reserved space is formed between the first annular groove and the second annular groove, which leaves space for protrusions that may be generated during the welding process, thereby preventing the protrusions from exceeding the edge of the front shell or the rear shell, thereby ensuring the uniform appearance of the vehicle-mounted camera.

[0034] In addition, the parts to be melted in the present application are independent components. Since the parts to be melted are solid, they have certain shape-retaining and anti-oxidation capabilities, and are mounted on the structural parts after the structural parts are installed in the clearance holes. This is not only convenient for storage and turnover, but also more efficient in the entire installation process, and can greatly reduce the cost of the entire assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] FIG1 is a schematic structural diagram of a vehicle-mounted camera provided in Example 1 of the present application;

[0037] FIG2 is a schematic structural diagram of the connection relationship between the structural member and the circuit board provided in Example 1 of the present application;

[0038] FIG3 is a schematic diagram of a workpiece to be melted formed by winding according to Example 1 of the present application;

[0039] FIG4 is a schematic diagram of a workpiece to be melted formed by molding according to Example 1 of the present application;

[0040] Figure 5 is a flow chart of the vehicle-mounted camera installation method provided in Example 2 of the present application.

[0041] Figure numerals: 1, front shell; 11, first ring groove; 2, rear shell; 21, second ring groove; 3, optical lens; 4, circuit board; 41, clearance hole; 5, structural part; 6, connector; 7, part to be melted; 8, reserved space; 9, installation space. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the embodiments described are only part of the embodiments of the present application, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present application are within the scope of protection of this application.

[0043] As described in the background art, during the welding process of a conventional vehicle-mounted camera, the heat generated by the welding is quickly transferred to the glue. However, the thermal conductivity of the glue is less than 1 (W / (m·K). As a result, the heat of the aluminum alloy housing cannot be transferred to the side of the glue close to the circuit board. As a result, the temperature of the side of the glue away from the circuit board rises, causing deformation or even melting of this side, ultimately affecting the stability of the circuit board installation.

[0044] In order to solve one or more of the above-mentioned technical problems in the prior art, the present application creatively proposes a vehicle-mounted camera and installation method, by opening a clearance hole on the circuit board, and passing a structural part fixedly connected to the front shell through the clearance hole, and then arranging a part to be melted on the side of the circuit board away from the front shell, and placing the part to be melted on the outer wall of the structural part, and then the part to be melted is heated and melted into the gap between the structural part and the clearance hole and fills the gap. After the part to be melted is cooled and solidified, the circuit board and the structural part are fixed. When the front shell and the rear shell are subsequently laser welded, the heat of the front shell can be conducted to the part to be melted through the structural part, so that the heat on the opposite sides of the part to be melted along the axial direction of the structural part is close, avoiding heat accumulation on one side causing melting of one side, thereby avoiding affecting the connection stability between the circuit board and the structural part, and making the circuit board stably installed in the installation space.

[0045] The following describes in detail the vehicle-mounted camera and installation method of the embodiment of the present application with reference to the accompanying drawings.

[0046] Example 1

[0047] Embodiment 1 of the present application provides a vehicle-mounted camera, as shown in Figure 1, which includes a front shell 1 and a rear shell 2. An optical lens 3 is integrally formed in the front shell 1. The front shell 1 and the rear shell 2 are fixed by welding. An installation space 9 is formed after the front shell 1 and the rear shell 2 are bonded together. A circuit board 4 is provided in the installation space. A plurality of structural members 5 are fixedly connected to the side of the front shell 1 close to the circuit board 4. The circuit board 4 is provided with a plurality of clearance holes 41. Each clearance hole 41 is used for a corresponding gap between the structural member 5. Photoelectric exchange is performed between the optical lens 3 and the circuit board 4. The circuit board 4 is connected to a connector 6 for communicating electrical signals with the outside.

[0048] As shown in Figures 1 and 2, a plurality of molten parts 7 with a predetermined thermal conductivity are provided on the side of the circuit board 4 facing away from the front housing 1. Each molten part 7 is located on the outer sidewall of a corresponding structural member 5. In a first state, all molten parts 7 melt under heat and partially enter the corresponding clearance holes 41, filling the gaps between the corresponding structural member 5 and the clearance holes 41. In a second state, the melted molten parts 7 cool and solidify, firmly connecting the corresponding structural member 5 to the circuit board 4. Preferably, the thermal conductivity ratio between the front housing 1 and the molten parts 7 is greater than 1 and less than 4. Specifically, in this embodiment, the front housing 1 is made of an aluminum alloy with a thermal conductivity of 237 W / (m·K), and the molten parts 7 are made of tin with a thermal conductivity of 67 W / (m·K). This effectively conducts heat from the front housing 1 and the rear housing 2, allowing the molten parts 7 to quickly reach temperature equilibrium with the front and rear housings 1 and 2, thereby reducing deformation caused by temperature differences.

[0049] The to-be-melted part 7 may be made of one of the metals having a melting point lower than 240° C. It is understood that the metals mentioned here include alloys.

[0050] In the embodiment of the present application, the part to be melted 7 is made of tin, but it can be understood that tin is only an exemplary and non-restrictive description of the material of the part to be melted 7 in the embodiment of the present application. Without violating the inventive concept of the present application, any known type of material that meets the thermal conductivity requirements and is easy to heat and melt can be used to manufacture the part to be melted 7.

[0051] It should be noted that in order to keep the material state of the part to be melted 7 unchanged during the welding process, the melting point of the part to be melted 7 needs to be higher than the temperature reached when the front shell 1 and the rear shell 2 are welded. For example, the melting point of tin is above 183°C, and the temperature of the front shell 1 and the rear shell 2 made of aluminum alloy will reach 100°C during welding, which will not affect the material state of the part to be melted 7.

[0052] The fixed connection between the front housing 1 and the structural members 5 includes riveting or threaded connection. In this embodiment, the connection between the front housing 1 and all structural members 5 is threaded connection. It should be noted that the number of structural members 5 is no less than two, and in order to evenly distribute the tightening force and ensure that the connection between the circuit board 4 and the front housing 1 remains stable after long-term use, the number of structural members 5 is set to an even number. At the same time, each two structural members 5 are correspondingly arranged to be symmetrical about the axis of the circuit board 4 so that when tightening the structural members 5, they can be tightened in a diagonal tightening order.

[0053] As one embodiment, as shown in FIG2 , the structural member 5 is generally cylindrical in shape. The portion connecting to the front housing 1 is provided with external threads. The inner wall of the front housing 1 is provided with internal threaded holes equal in number to the number of the structural members 5, for partially screwing into the structural member 5. After the structural member 5 is securely connected to the front housing 1, the unthreaded end of the structural member 5 is passed through the corresponding clearance hole 41. The friction between the structural member 5 and the circuit board 4 maintains the relative stability of the circuit board 4.

[0054] Furthermore, after the circuit board 4 and the structural member 5 are initially fixed, the to-be-melted member 7 is heated by an external device. The to-be-melted member 7 melts upon being heated, and the molten member 7 partially enters the clearance hole 41, thereby filling the corresponding gap between the structural member 5 and the clearance hole 41. The heating of the to-be-melted member 7 is then stopped, and the molten member 7 can be cooled by natural cooling or air cooling, gradually cooling and solidifying the molten member 7. This allows the structural member 5 to become one with the circuit board 4 through the to-be-melted member 7, thereby firmly connecting the structural member 5 to the circuit board 4.

[0055] In the embodiment of the present application, the part to be melted 7 is an independent component, which is sleeved on the structural member 5 after the structural member 5 is installed in the clearance hole 41. Preferably, as shown in Figures 3 and 4, the part to be melted 7 can be obtained by molding or winding, and its appearance can have different forms.

[0056] Because the component to be melted 7 is an independent part, after the circuit board 4 and the front lens housing 1 are aligned, it is mounted on the structural component 5 using a robot and then melted. This allows for online assembly and production, resulting in high production efficiency, great flexibility, and cost savings. Conventional solder paste, on the other hand, requires pre-printing on the circuit board. If the circuit board is defective, the printed solder paste must be scrapped and cannot be reused. If the printed solder paste is defective, the circuit board must be reprinted offline, which requires a long cycle and high rework costs.

[0057] Furthermore, for storage and turnover, the workpiece 7 of the present application can be packaged in woven bags, effectively protecting its shape and controlling temperature and humidity. Furthermore, the workpiece 7 is solid, offering a certain degree of shape retention and antioxidant properties. However, offline printed solder paste is in a paste-like form. After printing on a circuit board, the solder paste needs to be stored and transported along with the circuit board. Due to volume limitations, the circuit board needs to be transported for protection, resulting in high storage costs. Furthermore, the solder paste is easily damaged during workstation turnover, leading to high rework costs.

[0058] 1 and 2 , the part to be melted 7 is in a circular ring shape before being heated and melted and is sleeved on the outer wall of the corresponding structural part 5. In order to reduce the melting time and improve the connection efficiency, the inner wall of the part to be melted 7 is in line contact with the outer wall of the structural part 5, thereby shortening the path of the molten part to be melted 7 flowing into the clearance hole 41. At the same time, there is space between the inner wall of the part to be melted 7 and the clearance hole 41, which facilitates the flow of the molten part to be melted 7, thereby shortening the time for the molten part to be melted 7 to flow into the clearance hole 41.

[0059] Furthermore, the cross-section of the part to be melted 7 along the axial direction of the clearance hole 41 is circular. When the part to be melted 7 is heated, the outer wall of the part to be melted 7 melts first and gradually collapses toward the direction close to the circuit board 4, and gradually forms a relatively stable triangle. Almost at the same time, the inner wall of the part to be melted 7 starts to melt and gradually flows into the clearance hole 41 under the influence of gravity, and finally forms a stable structure. The cross-section of the structure along the axial direction of the structural part 5 is an isosceles trapezoidal shape.

[0060] Furthermore, a metal soldering process is performed on the position where the workpiece 7 contacts the circuit board 4 and in the hole to form a metal plating layer, including but not limited to tin plating, gold plating, silver plating, immersion gold, nickel plating, etc. This design can form better adhesion ability at the position where the workpiece 7 contacts it after it is melted, thereby increasing the welding strength.

[0061] Furthermore, a first annular groove 11 is provided at the end edge of the front shell 1 near the rear shell 2, and a second annular groove 21 is provided at the end edge of the rear shell 2 near the front shell 1. The first annular groove 11 and the second annular groove 21 form a reserved space 8. When the front shell 1 and the rear shell 2 are welded, the part where the front shell 1 and the rear shell 2 are in contact will melt, and the melted part may flow along the radial direction of the front shell 1. The partially melted front shell 1 and / or rear shell 2 overflow into the reserved space 8 and solidify to form a bulge. The setting of the reserved space 8 can ensure that the bulge will not exceed the outer wall edge of the front shell 1 and the rear shell 2, thereby improving the uniformity of the appearance of the vehicle-mounted camera.

[0062] Example 2

[0063] Corresponding to the above-mentioned embodiment 1, the present application also provides a method for installing a vehicle-mounted camera. In this embodiment, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction and will not be described in detail later. Referring to FIG. 5 , the method includes:

[0064] S100 , fixing and installing several structural components in the front housing 1 .

[0065] Specifically, referring to Figures 1 and 2, one structural member 5 is partially screwed into the internal threaded hole of the front shell 1, and then another structural member 5 is screwed into the corresponding internal threaded hole according to the diagonal principle, thereby ensuring that the connection force between all subsequent structural members 5 and the circuit board 4 remains consistent.

[0066] S200, placing the circuit board in the installation space formed by the front shell 1 and the rear shell 2, and respectively passing through all the clearance holes on the circuit board 4 to form a structural member 5, and placing the part to be melted on the outer side wall of each structural member 5;

[0067] Specifically, the respective clearance holes 41 on the circuit board 4 are aligned with the corresponding clearance holes 41 , and the structural member 5 is passed through the corresponding clearance holes 41 , and the structural member 5 is extended out of a portion of the circuit board 4 , and then the part to be melted 7 is placed on the outer side wall of the structural member 5 so that the part to be melted 7 flows into the gap between the structural member 5 and the clearance holes 41 after melting.

[0068] Preferably, the part to be melted 7 is annular before being heated and melted, and the inner ring wall of the part to be melted 7 is in contact with the outer wall line of the structural part 5. The part to be melted 7 can be directly sleeved on the structural part 5, so that the part to be melted 7 remains relatively stable during the melting process.

[0069] Preferably, after completing S200, the circuit board 4 and the front housing 1 including the lens are focused, and after the focusing is completed, S300 is performed.

[0070] S300 , heating the workpiece to be melted for a first preset time so that it melts and partially enters the clearance hole.

[0071] Specifically, the workpiece 7 to be melted is heated by contact or non-contact heating, and the heating is maintained for a period of time to meet the first preset time requirement, so that the melting degree of the workpiece 7 to be melted reaches the requirement and fully enters the gap between the structural member 5 and the clearance hole 41, thereby improving the connection strength between the circuit board 4 and the structural member 5.

[0072] Preferably, in this embodiment, a non-contact heating method is selected, specifically laser irradiation is adopted, and a multi-channel laser irradiation method can be adopted at the same time, so that all the parts to be melted 7 can be melted and solidified at the same time, thereby improving the connection strength between the structural part 5 and the circuit board 4.

[0073] S400: Cooling the melted component to be melted for a second preset time to fix the connecting structure and the circuit board.

[0074] Specifically, after stopping heating the part to be melted 7, the structural part 5, the part to be melted 7, the circuit board 4 and the front shell 1 are left to stand for a period of time until the second preset time requirement is reached, so that the melted part to be melted 7 is fully cooled and solidified again, thereby improving the connection strength between the structural part 5 and the circuit board 4 and the flatness of the part to be melted 7.

[0075] In this embodiment, natural cooling or air cooling can be used. When air cooling is used, a multi-angle, one-to-one cooling method can be used to increase the cooling rate, while attention should be paid to the air cooling intensity to maintain the shape of the workpiece 7.

[0076] S500, assemble the front shell and the rear shell, and weld the front shell and the rear shell.

[0077] Specifically, the surface to be welded of the front shell 1 is aligned with the surface to be welded of the rear shell 2 , and then laser welding is performed along a circumference of the welding surface of the front shell 1 and the rear shell 2 to ensure the fixing strength and sealing between the front shell 1 and the rear shell 2 .

[0078] It should be noted that the welding surface refers to the surface where the front shell 1 and the rear shell 2 are in contact when the two are assembled.

[0079] Preferably, before assembling the front shell 1 and the rear shell 2, a first annular groove 11 can be milled on the edge of the welding surface of the front shell 1 using CNC milling, and a second annular groove 21 can be milled on the edge of the welding surface of the rear shell 2 using CNC milling. The first annular groove 11 and the second annular groove 21 support and form a reserved space 8 to allow space for any overflow from the welding surface of the front shell 1 and the rear shell 2. At the same time, when milling the grooves, the oxide layer on the welding surface of the front shell 1 and the rear shell 2 needs to be removed to reduce the probability of explosion holes during the welding process.

[0080] The first annular groove 11 and the second annular groove 21 may be processed by laser sintering.

[0081] The above describes in detail the vehicle-mounted camera and installation method provided by this application. Specific examples are used herein to illustrate the principles and implementation methods of this application. The description of the above embodiments is intended only to help understand the method and core concept of this application. At the same time, those skilled in the art will appreciate that the specific implementation methods and scope of application may vary based on the concepts of this application. In summary, the contents of this specification should not be construed as limiting this application.

[0082] In the description of the present application, it should be understood that the terms "vertical", "parallel", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0083] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0084] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle-mounted camera, comprising a front shell and a rear shell, wherein the front shell and the rear shell are fixed by welding, and an installation space is formed between the front shell and the rear shell, characterized in that: The installation space is provided with a circuit board, a side of the front shell close to the circuit board is fixedly connected with a plurality of structural members, the circuit board is provided with a plurality of clearance holes, and each of the clearance holes is used for a corresponding gap of the structural member to pass through; A plurality of to-be-melted parts with a preset thermal conductivity are provided on one side of the circuit board away from the front shell, wherein the to-be-melted parts are separate parts and are sleeved on the corresponding outer side wall of the structural part after the structural part is installed to the clearance hole; In the first state, all the parts to be melted are melted by heat and partially enter the corresponding clearance holes to fill the gaps between the corresponding structural parts and the clearance holes; In the second state, the melted component to be melted cools and solidifies to fixedly connect the corresponding structural component and the circuit board.

2. The vehicle-mounted camera according to claim 1, characterized in that: The inner side wall of the to-be-melted component is in line contact with the outer side wall of the structural component.

3. The vehicle-mounted camera according to claim 2, characterized in that: The to-be-melted piece is in a circular shape before being heated and melted.

4. The vehicle-mounted camera according to claim 3, characterized in that: The to-be-melted part is obtained by molding or winding.

5. The vehicle-mounted camera according to any one of claims 1 to 4, characterized in that: The composition of the to-be-melted part includes one of the metals with a melting point lower than 240°C.

6. The vehicle-mounted camera according to any one of claims 1 to 4, characterized in that: The thermal conductivity ratio between the front shell and the part to be melted is greater than 1 and less than 4.

7. The vehicle-mounted camera according to any one of claims 1 to 4, characterized in that: The structural member is connected to the front shell by riveting or threading.

8. The vehicle-mounted camera according to any one of claims 1 to 4, characterized in that: A metal coating is provided at the position where the to-be-melted component contacts the circuit board and in the clearance hole.

9. The vehicle-mounted camera according to any one of claims 1 to 4, characterized in that: The front shell has a first annular groove at its end edge close to the rear shell, and the rear shell has a second annular groove at its end edge close to the front shell. A reserved space is formed between the first annular groove and the second annular groove.

10. A method for installing a vehicle-mounted camera according to any one of claims 1 to 9, the method comprising: Step 1: Fixing and installing a plurality of the structural components in the front shell; Step 2, placing the circuit board in the installation space formed by the front shell and the rear shell, and respectively inserting a structural member into all the clearance holes on the circuit board, and then sleeved the to-be-melted part with a preset thermal conductivity on the outer wall of each structural member; Step 3, heating the to-be-melted piece for a first preset time so that it melts and partially enters the make way hole; Step 4, cooling the melted component to be melted to a second preset time to fix the structural component and the circuit board; Step 5: Assemble the front shell and the rear shell, and weld the front shell and the rear shell.

11. The installation method according to claim 10, characterized in that: The installation method further comprises: after completing step 2, focusing the circuit board and the front shell including the lens, and after completing the focusing, performing step 3.

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