Vehicle-mounted camera module and vehicle

Abstract

The utility model discloses a vehicle-mounted camera module and a vehicle. The vehicle-mounted camera module comprises a front shell, a rear shell and a camera module, the lens is arranged in the front shell, and the lens and the front shell form an integrated lens; an accommodating space is defined by the rear shell and the front shell; the PCB is positioned in the accommodating space and is fixed on the rear shell; the bottom of the front shell is provided with a plurality of supporting legs, and the supporting legs are fixed on the PCB. By changing the structure of the lens and the AA mode, the original split type of the lens is changed into the integrated type of the lens and the front shell, the original mode of attaching the lens to the front shell is changed into the mode of attaching the lens to the PCB, and finally the front shell and the rear shell are mutually buckled and butted to fix the lens, so that the firmness of the lens is greatly improved under the condition that the AA precision is not influenced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle-mounted camera equipment, and in particular to a vehicle-mounted camera module and a vehicle. Background Art

[0002] With the rapid development of automotive electronics and security technologies, cameras have become indispensable hardware in traffic safety. They can not only provide monitoring of the environment inside the vehicle, but also be used for real-time monitoring outside the vehicle at a specific angle in specific situations.

[0003] The lens of a traditional automotive camera module is fixed to the upper surface of the front shell with AA glue. After curing, it can usually withstand a thrust of about 400-500N. However, the adhesive strength of the glue will decrease in harsh environments such as high temperature, high humidity, etc., and the glue is exposed to the outside. In addition, after years of sun and rain, acid and alkali corrosion, and natural oxidation, the glue will age and the adhesive strength will also decrease. In addition, if the camera is installed with poor accuracy, the lens is interfered with or squeezed, or the lens is subjected to internal and external stresses due to vibration during driving, there is also a risk of reduced fatigue life and lens detachment.

[0004] Therefore, there is an urgent need to provide a vehicle-mounted camera module and a vehicle to solve the above technical problems. Utility Model Content

[0005] The utility model provides a vehicle-mounted camera module and a vehicle, which can solve the above-mentioned problem of lens falling off.

[0006] According to some embodiments, the present invention provides a vehicle-mounted camera module, comprising: a front shell; a lens, the lens being arranged in the front shell and constituting an integrated lens with the front shell; a rear shell, the rear shell and the front shell together forming a accommodating space; a PCB board, the PCB board being located in the accommodating space and fixed on the rear shell, wherein a plurality of supporting feet are provided at the bottom of the front shell, and the supporting feet are fixed on the PCB board.

[0007] Preferably, a glue groove is provided at the bottom of the supporting foot; and the bottom of the supporting foot is pre-cured on the PCB board through an adhesive portion.

[0008] Preferably, a mounting platform protrudes from the bottom of the rear shell, and the PCB board is fixed on the mounting platform.

[0009] Preferably, a photosensitive chip is provided on the PCB at a position directly opposite to the lens.

[0010] Preferably, a heat sink is provided between the PCB board and the mounting platform.

[0011] Preferably, a through hole is provided on the PCB board at a position opposite to the lens; the through hole passes through the upper and lower sides of the PCB board; the photosensitive chip is provided in the through hole and the bottom is fixed on the heat sink.

[0012] Preferably, the heat sink and the PCB board, as well as the heat sink and the photosensitive chip, are connected and fixed by high thermal conductive glue.

[0013] Preferably, the heat sink is provided with a raised portion embedded in the through hole, and the bottom of the photosensitive chip is fixed on the raised portion; and / or, the heat sink and the raised portion are both made of heat-conducting material.

[0014] Preferably, the front shell and the rear shell are fixedly connected.

[0015] According to some embodiments, the present invention further provides a vehicle, comprising: the aforementioned vehicle-mounted camera.

[0016] Beneficial effects:

[0017] The present application provides a vehicle-mounted camera module and a vehicle. By changing the lens structure and the AA method, the lens is changed from the original split type to an integrated structure with the front shell, and the problem of the lens falling off the front shell does not exist; the lens is changed from being attached to the front shell to being attached to the PCB board, which can effectively fix the PCB board to ensure AA accuracy and structural reliability; finally, the front shell and the rear shell are fixedly connected to fix the lens. Therefore, the present application greatly improves the firmness of the lens without affecting the AA accuracy, and can completely solve the problem of the lens falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the structure of a vehicle-mounted camera module in the prior art;

[0020] Figure 2 Schematic diagram of the vehicle camera module structure in this embodiment.

[0021] Figure numerals: 1, front shell; 11, supporting foot; 2, lens; 3, lens; 4, back shell; 41, mounting platform; 5, PCB board; 51, photosensitive chip; 52, through hole; 53, gold wire; 6, pasting part; 7, screw; 8, heat sink; 81, protrusion; 9, high thermal conductive glue. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, each embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that many technical details are provided in each embodiment of the present invention to help readers better understand the present invention. However, even without these technical details and the various changes and modifications based on the following embodiments, the technical solutions claimed in the present invention can be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with each other and referenced to each other under the premise that there is no contradiction.

[0023] like Figure 1 As shown, the traditional vehicle-mounted camera module is mainly composed of a front shell 1, a lens 3, a rear shell 4, a PCB board 5, a photosensitive chip 51 and various electronic components, wherein the photosensitive chip 51 is mounted on the PCB board 5 by surface mounting technology, and the PCB board 5 is then locked inside the front shell 1 by screws 7, and then the lens 3 is adhered to the upper surface of the front shell 1 by glue using an AA device, and the lens 3 is passed through the front shell 1 with the inner end facing the PCB board 5, and finally the entire module is assembled between the front shell 1 and the rear shell 4 by gluing or locking screws.

[0024] The main function of the lens is to collect light and project it onto the photosensitive chip on the PCB board to form an image. When assembling the lens, the distance tolerance between the lens and the photosensitive chip and the optical axis angle tolerance are very strict. Usually, high-precision AA (Active Alignment) equipment is used to complete the process. The PCB board is generally fixed inside the front shell with screws. The lens is then adhered to the upper surface of the front shell using AA equipment and AA glue. The front and back shells are then fixed with glue or screws. However, this structure has the problem of lens falling off. The cause analysis is basically due to glue failure or the lens being squeezed or hit by external force.

[0025] Therefore, the embodiments of the present application provide a vehicle-mounted camera module and a vehicle, which mainly solve the problem of the camera module lens falling off due to factors such as the decrease in glue adhesion or the poor assembly accuracy of the vehicle causing the lens to be squeezed by external force, thereby increasing its strength and improving the reliability of the camera module.

[0026] The following is a detailed description of a vehicle-mounted camera module provided in this embodiment in conjunction with the accompanying drawings. Figure 2As shown, it includes: a front shell 1, a lens 2, a rear shell 4 and a PCB board 5. The lens 2 is arranged in the front shell 1, and the lens 2 and the front shell 1 form an integrated lens 3; the rear shell 4 and the front shell 1 are buckled and docked with each other to form an accommodating space, and the PCB board 5 is located in the accommodating space and fixedly assembled on the rear shell 4; wherein, a plurality of supporting feet 11 are provided at the bottom of the front shell 1, and the plurality of supporting feet 11 are fixed on the PCB board 5.

[0027] In the present embodiment, the front shell 1 can be made by metal forging and then numerically controlled, and then the lens 2 is installed inside the front shell 1, and finally the front shell 1 and the lens 2 form an integral structure. Of course, in other embodiments, the front shell 1 can also be injection molded, and then the lens 2 is installed in the front shell 1 to form an integrated structure. It is also possible to design the lens barrel and the front shell 1 as an integrated die-casting, and then encapsulate the lens 2 in the lens barrel to form a complete integrated lens 3. Such an arrangement can realize the miniaturization design of the vehicle-mounted camera and save the assembly process of the vehicle-mounted camera. In addition, the lens 3 is changed from the split type in the prior art (the lens 3 and the front shell 1 are fixed by glue) to an integrated type with the front shell 1. The integrated lens 3 does not have the problem of the lens 3 falling off from the front shell 1, and the stability is higher. In order to complete the AA process of the lens 3, the PCB board 5 is fixed to the rear shell 4 instead of the original fixed type with the front shell 1. At the same time, the support legs 11 at the bottom of the front shell 1 are used to fix on the PCB board 5, so that the PCB board 5 can be effectively fixed to ensure AA accuracy and structural reliability.

[0028] In this embodiment, it should be noted that a photosensitive chip 51 is provided on the PCB board 5 at a position directly opposite the lens 2. To ensure the distance tolerance and tilt angle tolerance between the lens 3 and the photosensitive chip 51 during assembly, a plurality of supporting feet 11 are designed at the bottom of the front shell 1 located within the accommodating space. The number of the supporting feet 11 can be 3, 4, 5, or more. In this embodiment, only four supporting feet 11 are provided as an example. The four supporting feet 11 are arranged in a rectangular shape. At the same time, four blank areas are reserved on the PCB board 5 for not mounting the sensor chip 51. After aligning the optical axis with the center of the photosensitive chip 51 using an AA device, the supporting feet 11 at the bottom of the front shell 1, i.e., the integrated lens 3, are pre-cured at the four blank areas on the front of the PCB board 5 through the adhesive portion 6. After UV light curing, the lens 3 can be effectively fixed. The adhesive portion 6 can be double-sided tape or glue. Preferably, the adhesive portion 6 uses glue.

[0029] In some embodiments, to increase the adhesive strength, an adhesive groove is further provided at the bottom of the support leg 11 to increase the adhesive surface area. The width and depth of the adhesive groove are recommended to be 0.2 to 0.5 mm. Preferably, the adhesive groove is a cross-shaped groove or a 'P'-shaped groove, which is not specifically limited in this embodiment.

[0030] In this embodiment, it should also be noted that the PCB board 5 is fixed inside the rear housing 4 by means of screws 7 .

[0031] In this embodiment, the PCB board 5 is changed from being locked in the front shell 1 to being locked in the rear shell 4. Because extremely high assembly precision is required between the lens 3 and the photosensitive chip 51, the PCB board 5 is first fixed to the rear shell 4, and then the AA device is used to adjust the distance between the lens 3 and the photosensitive chip 51 and the optical axis angle of the lens 3 to the imaging point. Then, the front shell 1, that is, the support feet 11 at the bottom of the lens 3, are pre-cured with glue at the four blank spaces on the front of the PCB board 5. After UV curing, the first fixing effect is achieved. Locking the PCB board 5 in the rear shell 4 can also ensure that the camera module function does not fail due to the PCB board 5 falling off.

[0032] In some embodiments, a mounting platform 41 is provided on the bottom protrusion of the rear housing 4. The mounting platform 41 is used to secure the PCB 5. Screw holes for screws 7 are provided on the mounting platform 41. In this embodiment, the PCB 5 is secured to the mounting platform 41 using screws 7, facilitating assembly and disassembly. Corresponding screw holes for screwing with the screws 7 are provided on the mounting platform 41, ensuring screw connection strength and enhancing connection stability. It is understood that the PCB 5 can also be secured to the mounting platform 41 by gluing or welding, and this is not specifically limited in this embodiment.

[0033] In this embodiment, it should also be noted that there are millions or even tens of millions of micro photodiodes on the photosensitive chip 51. A large amount of heat will be generated in the process of converting the received light signal into an electrical signal, causing the chip temperature to rise rapidly. The more diodes there are, the higher the corresponding power consumption and the greater the heat generated. The integrated lens 3 will sacrifice the space above the chip, resulting in a decrease in heat dissipation capacity.

[0034] Therefore, in order to solve the above problem, in this embodiment, a heat sink 8 is further provided between the PCB board 5 and the mounting platform 41 to dissipate heat.

[0035] In one feasible method, a through hole 52 is provided on the PCB board 5 at a position opposite to the lens 2. The through hole 52 runs through the upper and lower sides of the PCB board 5. The through hole 52 is adapted to the photosensitive chip 51. The photosensitive chip 51 is provided in the through hole 52 and the bottom is attached and fixed to the heat sink 8. Then, the heat generated by the photosensitive chip 51 is introduced into the bottom space through the heat sink 8 for dissipation. Since the thickness of the PCB board 5 is generally thicker than that of the photosensitive chip 51, in order to prevent the photosensitive chip 51 from being too embedded in the through hole 52 and affecting the imaging effect of the lens 3, a protrusion 81 is provided on the heat sink 8 at a position corresponding to the through hole 52. The protrusion 81 is embedded in the through hole 52, and the bottom of the photosensitive chip 51 is attached and fixed on the protrusion 81. The heat sink 8 and the PCB board 5 as well as the protrusion 81 and the photosensitive chip 51 are connected and fixed by high thermal conductive glue 9. Therefore, the heat generated by the photosensitive chip 51 is conducted to the protrusion 81 and the heat sink 8 through the high thermal conductive glue 9, and then dissipated by the heat sink 8. It should be noted that the protrusion 81 and the heat sink 8 are both made of heat-conducting materials. Both can be made of the same material, such as steel sheets, and the protrusion 81 can be integrally formed on the heat sink 8, that is, the protrusion 81 and the heat sink 8 are set as an integral steel sheet. The thickness of the steel sheet is 0.1-0.2mm. The thermal conductivity coefficient of stainless steel is about 16W / MK. Therefore, the use of steel sheets can effectively transfer the heat generated by the photosensitive chip 51 to the bottom space of the camera module to increase heat dissipation.

[0036] In this embodiment, it should also be noted that the PCB board 5 and the photosensitive chip 51 are connected via a gold wire 53 .

[0037] In some embodiments, the photosensitive chip 51 is attached and fixed to the bottom of the steel sheet by a high thermal conductive adhesive 9, so the photosensitive chip 51 is changed to a COB (Chips on Board, COB) packaging method, and the original bottom solder pad connection is changed to a connection method of punching gold wire 53 through a WB (Wire bond) device. One end of the gold wire 53 is connected to the PCB board 5, and the other end is connected to the packaging pin on the photosensitive chip 51.

[0038] In this embodiment, it should also be noted that the front shell 1 and the rear shell 4 are fixedly connected, for example, by laser welding.

[0039] In some embodiments, the gap between the front shell 1 and the rear shell 4 is connected by laser welding to achieve a second level of fixation. The glue in this embodiment only plays the role of AA post-curing and the first level of fixed connection between the lens 3 and the PCB board 5, while the second level of rigid connection by laser welding between the front shell 1 and the rear shell 4 is mainly used to ensure that the lens 3 does not fall off, because the laser welding strength is much greater than the glue bonding strength. In addition, to ensure the laser welding strength, the materials of the front shell 1 and the rear shell 4 are both AL1070 high-purity alumina plate.

[0040] In this embodiment, a vehicle is further provided, including: the above-mentioned vehicle-mounted camera module.

[0041] The implementation principle of this embodiment: In the embodiment of the present application, by changing the lens structure and the AA method, the lens 3 is changed from the original split structure to an integrated structure with the front shell 1, that is, the lens 3 and the front shell 1 are designed to be integrated die-cast, so that there is no problem of the lens 3 falling off from the front shell 1; in order to complete the AA process of the lens 3, the PCB board 5 is changed from being fixed to the front shell 1 to being fixed to the rear shell 4, which can effectively fix the PCB board 5 to ensure AA accuracy and structural reliability; finally, the gap between the front shell 1 and the rear shell 4 is fixed by laser welding. After laser welding, the thrust and shear force are much greater than the traditional AA dispensing method, which can completely solve the problem of the lens 3 falling off.

[0042] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims or their equivalents.

Claims

1. A vehicle-mounted camera module, characterized in that: include: Front shell (1); A lens (2), the lens (2) being arranged in the front shell (1) and forming an integrated lens (3) with the front shell (1); A rear shell (4), wherein the rear shell (4) and the front shell (1) together form an accommodation space; A PCB board (5), the PCB board (5) being located in the accommodation space and fixed on the rear housing (4); A plurality of supporting feet (11) are provided at the bottom of the front shell (1), and the supporting feet (11) are fixed on the PCB board (5).

2. The vehicle-mounted camera module according to claim 1, wherein: The bottom of the supporting foot (11) is provided with an adhesive groove; The bottom of the supporting foot (11) is pre-cured on the PCB board (5) through the adhesive portion (6).

3. The vehicle-mounted camera module according to claim 1, wherein: A mounting platform (41) protrudes from the bottom of the rear shell (4), and the PCB board (5) is fixed on the mounting platform (41).

4. The vehicle-mounted camera module according to claim 3, wherein: A photosensitive chip (51) is provided on the PCB board (5) at a position directly opposite to the lens (2).

5. The vehicle-mounted camera module according to claim 4, characterized in that: A heat sink (8) is provided between the PCB board (5) and the mounting platform (41).

6. The vehicle-mounted camera module according to claim 5, characterized in that: A through hole (52) is provided on the PCB board (5) at a position directly opposite to the lens (2); The through hole (52) passes through the upper and lower sides of the PCB board (5); The photosensitive chip (51) is arranged in the through hole (52) and the bottom is fixed on the heat sink (8).

7. The vehicle-mounted camera module according to claim 6, characterized in that: The heat sink (8) and the PCB board (5), as well as the heat sink (8) and the photosensitive chip (51), are connected and fixed via a high thermal conductivity adhesive (9).

8. The vehicle-mounted camera module according to claim 6, wherein: The heat sink (8) is provided with a raised portion (81) embedded in the through hole (52), and the bottom of the photosensitive chip (51) is fixed on the raised portion (81); And\or, the heat sink (8) and the raised portion (81) are both made of heat-conducting materials.

9. The vehicle-mounted camera module according to any one of claims 1 to 8, characterized in that: The front shell (1) and the rear shell (4) are fixedly connected.

10. A vehicle, characterized in that: include: The vehicle-mounted camera module according to any one of claims 1 to 9.

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