Light leakage prevention vehicle-mounted camera

Abstract

The utility model discloses a light leakage prevention vehicle-mounted camera which comprises an upper shell, a support and a lower shell which are connected in sequence, a lamp panel is arranged between the upper shell and the support, a mainboard is arranged between the support and the lower shell, a lens is installed on the support, lamp beads are installed on the lamp panel, the upper shell comprises a light-transmitting part and a non-light-transmitting part, and the light-transmitting part and the non-light-transmitting part are arranged on the lower shell. The lens and the lamp bead are arranged corresponding to the light-transmitting part, the non-light-transmitting part is arranged around the light-transmitting part, a light blocking frame is arranged around the lens, one end of the light blocking frame is arranged on the inner side face of the upper shell, and the other end of the light blocking frame is arranged on the surface, close to the upper shell, of the lamp panel. The light blocking frame is arranged between the lens and the lamp beads. The anti-light-leakage vehicle-mounted camera effectively prevents stray light from entering the lens to affect imaging quality, and prevents the stray light from entering the lens to cause performance failure of the camera.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera technical field, especially involve a kind of anti-light leakage vehicle-mounted camera. BACKGROUND

[0002] Intelligent driving gradually becomes the development trend of vehicle industry, and it can be divided into six levels, and the higher the level, the higher the automation degree. Intelligent driving mainly identifies driving conditions such as zebra crossings, traffic lights, surrounding vehicles, pedestrians and road congestion in front through radar systems and visual sensing systems, etc., and at the same time, it identifies the state of passengers in the cabin, judges whether it is fatigue driving and whether it is wearing a safety belt, etc., to assist driving, so as to reduce the traffic accident rate and improve the driving experience. Among them, the vehicle-mounted camera is an essential component of the visual sensing system.

[0003] The vehicle-mounted camera, especially the driver monitoring camera, monitors the driver's head, eyes, face and other details in real time, then performs pattern recognition on the obtained information data, and then makes a fatigue or distraction state judgment to realize the function of fatigue driving reminder. In order to meet the needs of day and night shooting, lamp beads are installed in the camera for infrared light compensation. In order to simplify the design and beautify the appearance, avoid attracting the attention of the driver, the camera lamp beads are often integrated with the camera body, and are closed in the camera structure.

[0004] However, while the lamp beads compensate for the light of the object imaging, stray light may also enter the lens or the light-in area of the photosensitive chip, introducing additional light on the object imaging light path, affecting the characteristics of the image, resulting in a decrease in picture contrast, image whitening and other situations, which seriously affects the image quality and causes the driver monitoring system to fail. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides an anti-light leakage vehicle-mounted camera, which effectively avoids the influence of stray light on the imaging quality at the lens, and prevents the performance failure of the camera caused by stray light entering the lens.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] An anti-light leakage vehicle-mounted camera, comprising an upper shell, a bracket and a lower shell connected in sequence, a lamp panel is arranged between the upper shell and the bracket, a mainboard is arranged between the bracket and the lower shell, a lens is installed on the bracket, lamp beads are installed on the lamp panel, the upper shell comprises a light-transmitting part and a non-light-transmitting part, the lens and the lamp beads are arranged corresponding to the light-transmitting part, the non-light-transmitting part is arranged around the light-transmitting part, a light-blocking frame is arranged around the lens, one end of the light-blocking frame is arranged on the inner side surface of the upper shell, and the other end is arranged on the surface of the lamp panel close to the upper shell, and the light-blocking frame is arranged between the lens and the lamp beads.

[0008] Optionally, the light blocking frame comprises a first light blocking rib plate, a second light blocking rib plate and a third light blocking rib plate connected together, the first light blocking rib plate, the second light blocking rib plate and the third light blocking rib plate each comprise a connecting table and a main rib plate connected together, the connecting table is embedded in the upper shell, and the end of the main rib plate away from the upper shell is provided with a crushing rib.

[0009] Optionally, the light blocking frame further comprises a side wall of the non-light-transmitting part close to the light-transmitting part, and the first light blocking rib plate, the second light blocking rib plate, the third light blocking rib plate and the side wall of the non-light-transmitting part close to the light-transmitting part surround to form the light blocking frame.

[0010] The first light blocking rib plate and the second light blocking rib plate further comprise a base table arranged between the connecting table and the main rib plate, and the width of the base table is greater than the thickness of the main rib plate.

[0011] Optionally, the main rib plate is provided with a base column in the height direction, and the base column extends from the bottom to the top of the main rib plate.

[0012] Both sides of the main rib plate are provided with the base column, and the base columns arranged on both sides of the main rib plate are symmetrically or asymmetrically arranged.

[0013] The thickness of the bottom end of the main rib plate is greater than the thickness of the top end of the main rib plate.

[0014] Optionally, the support is provided with a first lens hole for mounting the lens, the hole table top end surface height of the first lens hole is higher than the surface height after the lamp plate is mounted, and the lens is fixedly connected to the hole table top end surface.

[0015] The lens is provided with a connecting ring table, and the connecting ring table is fixedly connected to the hole table top end surface through a black UV glue layer.

[0016] Optionally, the support is provided with a chip shielding ring table close to the surface of the lower shell, the chip shielding ring table is arranged around the photosensitive chip mounted on the mainboard, the bottom end of the chip shielding ring table is provided with a light transmission hole, the light transmission hole is coaxially and communicatively arranged with the first lens hole, the light transmission hole is correspondingly arranged with the photosensitive chip, and the size of the light transmission hole is greater than the size of the photosensitive chip.

[0017] Optionally, the chip shielding ring table is provided with a sealing ring close to the end surface of the mainboard, one end of the sealing ring is provided with a plug-in ring groove, and the other end is a flat end, the chip shielding ring table is plugged into the plug-in ring groove, and the flat end of the sealing ring is in contact with the mainboard.

[0018] The sealing ring is made of non-light-transmitting rubber material.

[0019] Optionally, a first male lip is provided at the position where the bracket connects to the upper shell, and the bottom end of the first male lip is located near the outer side of the bracket. A first female lip is provided at the position where the upper shell connects to the bracket, and the first female lip is configured to cooperate with the first male lip.

[0020] The top of the first female lip is fitted with the bottom of the first male lip with zero clearance, and the bottom of the first female lip is fitted with the top of the first male lip with zero clearance.

[0021] The inner surface of the first female lip is provided with a first protrusion.

[0022] Optionally, a second female lip is provided at the position where the bracket connects to the lower shell, and the bottom end of the second female lip is provided near the inner side of the bracket. A second male lip is provided at the position where the lower shell connects to the bracket, and the second female lip and the second male lip are configured to cooperate with each other.

[0023] The top of the second female lip is fitted with the bottom of the second male lip with zero clearance, and the bottom of the second female lip is fitted with the top of the second male lip with zero clearance.

[0024] The inner surface of the second female lip is provided with a second protrusion.

[0025] Optionally, the surface of the lamp panel is coated with a black matte insulating ink layer;

[0026] The LED is a near-infrared LED.

[0027] The light-transmitting part is a PC material structure that can transmit near-infrared light.

[0028] As can be seen from the above technical solution, the anti-light leakage vehicle camera provided by this utility model, by surrounding the lens with a light-blocking frame, one end of which is located on the inner side of the upper shell and the other end on the surface of the lamp panel near the upper shell, and the light-blocking frame is positioned between the lens and the LED, thereby separating the lens from the LED and other structures. This effectively prevents invalid imaging light from entering the lens through direct, reflected, or refracted light, preventing stray light from entering the lens and causing camera performance failure. The light from the LED inside the camera is isolated by the light-blocking frame, preventing the light from entering the lens and avoiding glare or bright spots in the image caused by the LED forming an image in the lens, thus improving image quality and enhancing the reliability of the driver monitoring system. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 An exploded structural diagram of the light-leakage-proof vehicle-mounted camera provided in an embodiment of this utility model;

[0031] Figure 2 A cross-sectional view of the light-leakage-proof vehicle-mounted camera provided in this embodiment of the utility model;

[0032] Figure 3 A schematic diagram of the upper shell at one angle provided in an embodiment of this utility model;

[0033] Figure 4 This is a structural schematic diagram of the upper shell from another angle provided in an embodiment of the present utility model;

[0034] Figure 5 A partially enlarged structural schematic diagram of the crushing rib provided in an embodiment of this utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the lamp panel provided in an embodiment of the present utility model;

[0036] Figure 7 A schematic diagram of the structure of the bracket at one angle provided in an embodiment of this utility model;

[0037] Figure 8 This is a structural schematic diagram of the bracket provided in another embodiment of the present utility model.

[0038] in:

[0039] 1. Top shell;

[0040] 101. Light-transmitting part; 1011. View frame; 1012. J-shaped injection port; 102. Non-light-transmitting part; 103. First female lip; 104. First plane; 105. Second plane; 106. First protrusion;

[0041] 2. Lens;

[0042] 201. Connecting ring platform;

[0043] 3. Light panel;

[0044] 301. Second lens hole; 302. First limiting hole; 303. First plate indirect insertion;

[0045] 4. Bracket;

[0046] 401. First male lip; 402. First lens hole; 403. First limiting post; 404. Clearance through hole; 405. First connecting threaded hole; 406. Light-transmitting hole; 407. Chip shielding ring; 408. Support boss; 409. Locking block; 410. Second connecting threaded hole; 411. Second female lip; 412. Second limiting post;

[0047] 5. Motherboard;

[0048] 501. Second limiting hole; 502. Second plate indirect insertion; 503. Clearance notch;

[0049] 6. Lower shell;

[0050] 601. Second male lip; 602. Connecting through hole;

[0051] 7. LED beads;

[0052] 8. First connecting screw;

[0053] 9. Photosensitive chip;

[0054] 10. Second connecting screw;

[0055] 11. Thermal pads;

[0056] 12. Sealing ring;

[0057] 13. Black UV adhesive layer;

[0058] 14. Light-blocking frame;

[0059] 141. First light-shielding rib; 142. Second light-shielding rib; 143. Third light-shielding rib; 1401. Base platform; 1402. Main rib plate; 1403. Base column; 1404. Crushing rib; 1405. Connecting platform;

[0060] 15. Fakra connector. Detailed Implementation

[0061] This utility model discloses a light-leakage-proof vehicle camera, which effectively avoids stray light entering the lens and affecting image quality, and prevents stray light entering the lens from causing camera performance failure.

[0062] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0063] See Figures 1 to 8 This utility model discloses a light-leakage-proof vehicle-mounted camera, comprising an upper shell 1, a bracket 4, and a lower shell 6 connected in sequence. A light panel 3 is disposed between the upper shell 1 and the bracket 4, and a main board 5 is disposed between the bracket 4 and the lower shell 6. A lens 2 is mounted on the bracket 4, and LED beads 7 are mounted on the light panel 3. The mounting method is existing technology and will not be described in detail here. The upper shell 1 includes a light-transmitting part 101 and a light-blocking part 102. For imaging, the lens 2 and LED beads 7 are correspondingly arranged with the light-transmitting part 101, and the light-blocking part 102 is arranged around the light-transmitting part 101. A light-blocking frame 14 is disposed around the lens 2. One end of the light-blocking frame 14 is disposed on the inner side of the upper shell 1, and the other end is disposed on the surface of the light panel 3 near the upper shell 1. The light-blocking frame 14 is disposed between the lens 2 and the LED beads 7.

[0064] The light-transmitting part 101 is provided with a viewing frame 1011 and a J-shaped injection port 1012, such as Figure 3 As shown, the view frame 1011 and the J-shaped injection port 1012 are embedded in the opaque part 102 and are injection molded integrally with the opaque part 102. The surface of the view frame 1011 is higher than the opaque part 102, and its thickness is 1mm. The inner side of the view frame 1011 is a first plane 104. During molding, the light-transmitting part 101 is first molded through the J-shaped injection port 1012, and then the opaque part 102 is injection molded, ensuring that the upper shell 1 structure is an integral structure, reducing BOM materials and assembly input. The surface of the view frame 1011 is higher than the opaque part 102, reserving assembly space for the lens 2 and the LED 7. By setting a light-blocking frame 14 to separate the LED 7 and the lens 2, the light emitted by the LED 7 is prevented from entering the lens 2. The inner side of the opaque part 102 is provided with a second plane 105. There are two LEDs 7, which are symmetrically arranged at both ends of the lens 2, and the light-blocking frame 14 passes through the gap between the lens 2 and the LED 7.

[0065] This utility model discloses a vehicle-mounted camera with light leakage prevention. A light-blocking frame 14 surrounds the lens 2, with one end of the frame 14 located on the inner side of the upper housing 1 and the other end on the surface of the lamp plate 3 near the upper housing 1. The light-blocking frame 14 is positioned between the lens 2 and the LED 7, effectively separating the lens 2 from the LED 7 and other structures. This effectively prevents invalid imaging light from entering the lens 2 through direct, reflected, or refracted light, thus preventing stray light from entering the lens 2 and causing camera performance failure. The light from the LED 7 inside the camera is isolated by the light-blocking frame 14, preventing the light from entering the lens 2 and avoiding glare or bright spots caused by the LED 7 forming an image in the lens 2. This improves image quality and enhances the reliability of the driver monitoring system.

[0066] Specifically, the light-blocking frame 14 includes a first light-blocking rib plate 141, a second light-blocking rib plate 142, and a third light-blocking rib plate 143 connected together. Each of the first, second, and third light-blocking rib plates 141, 142, and 143 includes a connecting platform 1405 and a main rib plate 1402 connected together. The connecting platform 1405 is embedded within the upper shell 1. The end of the main rib plate 1402 furthest from the upper shell 1 is provided with a crushing rib 1404. Figure 2 and Figure 4 As shown.

[0067] To form a closed light-blocking frame, the light-blocking frame 14 also includes a non-transparent portion 102 near the side wall of the light-transmitting portion 101. The first light-blocking rib 141, the second light-blocking rib 142, and the third light-blocking rib 143, together with the side wall of the non-transparent portion 102 near the light-transmitting portion 101, form the light-blocking frame 14. Figure 4 As shown. Further, the first light-shielding rib 141 and the second light-shielding rib 142 are symmetrically distributed relative to the lens 2. The first light-shielding rib 141 and the second light-shielding rib 142 are disposed on the first plane 104 and perpendicular to the first plane 104, and parallel to the short side of the field of view frame 1011. The third light-shielding rib 143 is disposed on the second plane 105 near the edge of the first plane 104 and perpendicular to the second plane 105. The two ends of the third light-shielding rib 143 are respectively connected to the first light-shielding rib 141 and the second light-shielding rib 142, and the third light-shielding rib 143 is parallel to the long side of the field of view frame 1011. The first light-shielding rib 141, the second light-shielding rib 142, and the third light-shielding rib 143 form a rectangular closed area with the side wall of the non-transparent part 102 near the light-transmitting part 101.

[0068] To improve the structural stability of the frame, the first light-shielding rib plate 141 and the second light-shielding rib plate 142 also include a base 1401. The base 1401 is disposed between the connecting platform 1405 and the main rib plate 1402, and the width of the base 1401 is greater than the thickness of the bottom end of the main rib plate 1402. The bottom end surface of the base 1401 is attached to the first plane 104. The connecting platform 1405 of the first light-shielding rib plate 141 and the second light-shielding rib plate 142 is embedded inside the light-transmitting part 101 to prevent the light emitted by the lamp bead 7 from being refracted by the body material of the viewing frame 1011 and entering the lens of the lens 2.

[0069] To improve the structural strength of the main stiffening plate 1402, base columns 1403 are provided along the height direction of the main stiffening plate 1402, extending from the bottom to the top. Base columns 1403 are provided on both sides of the main stiffening plate 1402, and the base columns 1403 on both sides are arranged symmetrically or asymmetrically. The thickness of the bottom end of the main stiffening plate 1402 is greater than the thickness of its top end, which not only improves structural strength and stability but also facilitates mold release. In one embodiment, the base columns 1403 are located in the middle of the main stiffening plate 1402, and the cross-section of the base columns 1403 on both sides of the main stiffening plate 1402 is a semi-circular frustum, and the base columns 1403 on both sides are arranged symmetrically, thus forming a frustum shape. The bottom dimension of the base column 1403 is larger than the top dimension, which not only improves structural stability but also facilitates mold release. The crushing reinforcement 1404 is placed at the top of the main reinforcement slab 1402, and the included angle A of the top of the cross-section of the crushing reinforcement 1404 is 45°-135°. Figure 5 As shown, the top of the crushing rib 1404 is rounded. After the upper shell 1 and the bracket 4 are assembled, the top of the crushing rib 1404 crushes into contact with the lamp plate 3. The first light-shielding rib 141, the second light-shielding rib 142 and the third light-shielding rib 143 form a rectangular closed area with the side wall of the non-transparent part 102 of the upper shell 1, which is the imaging light-inlet area of ​​the lens 2. The two sides of the field of view frame 1011 separated by the rectangular closed area are the light emission areas of the two lamp beads 7, respectively. The crushing rib 1404 at the top of the first light-shielding rib 141, the second light-shielding rib 142 and the third light-shielding rib 143 crushes into contact with the lamp plate 3, reducing the amount of light from the two lamp beads 7 entering the lens of the lens 2 through the gap between the main rib 1402 and the lamp plate 3 after multiple reflections.

[0070] To facilitate the installation of lens 2, bracket 4 is provided with a first lens hole 402 for mounting lens 2. The height of the top surface of the first lens hole 402 is higher than the surface height of the lamp plate 3 after installation. Lens 2 is fixedly connected to the top surface of the hole. To facilitate the installation of lamp plate 3, lamp plate 3 is provided with a second lens hole 301 for the top surface of the first lens hole 402 to pass through. To facilitate connection with the top surface of the hole of the first lens hole 402, lens 2 is provided with a connecting ring platform 201. The platform of the connecting ring platform 201 is fixedly connected to the top surface of the hole platform by a black UV adhesive layer 13, such as... Figure 2 As shown. Understandably, the distance between the connecting ring platform 201 and the end face of the lens 2 extending into the first lens hole 402 is less than the depth of the first lens hole 402. The top surface of the hole platform of the first lens hole 402 is higher than the height of the lamp board 3, which can prevent the light from the lamp bead 7 from leaking through the gap between the lamp board 3 and the crushing rib 1404 of the light-blocking frame 14 and directly shining into the black UV adhesive layer 13.

[0071] To ensure reliable connection, the thickness of the black UV adhesive layer 13 is greater than 0.5 mm. This thickness ensures reliable support and fixation for the lens 2. The specific thickness of the black UV adhesive layer 13 is determined based on the focal length of the lens 2 and the distance between the lens 2 and the photosensitive chip 9 on the motherboard 5. The black UV adhesive layer 13 helps reduce the amount of light propagating into the adhesive and minimizes stray light entering the photosensitive chip 9, thus reducing the amount of light entering the adhesive.

[0072] Furthermore, to improve the sealing around the photosensitive chip 9, a chip-blocking ring 407 is provided on the surface of the bracket 4 near the lower housing 6, surrounding the photosensitive chip 9 mounted on the motherboard 5. To receive the light from the image formed by the lens 2, a light-transmitting hole 406 is provided at the bottom of the chip-blocking ring 407. The light-transmitting hole 406 is coaxially connected to the first lens hole 402 and corresponds to the photosensitive chip 9. The size of the light-transmitting hole 406 is larger than the size of the photosensitive chip 9. Specifically, the diameter of the light-transmitting hole 406 is smaller than the diameter of the first lens hole 402 but larger than the maximum imaging circle diameter of the lens 2, thus forming a stepped platform at the connection point between the light-transmitting hole 406 and the first lens hole 402. This stepped platform intercepts light entering the first lens hole 402 through the black UV adhesive layer 13 without affecting the optical path for object imaging. The distance between the top of the light-transmitting aperture 406 and the bottom of the lens 2 is 0.5 mm to reduce the propagation space of light within the first lens aperture 402. The surface treatment of the first lens aperture 402 is anodized blackening, which helps to reduce the diffuse reflection propagation of light entering the first lens aperture 402 through the black UV adhesive, thereby reducing stray light entering the photosensitive chip 9.

[0073] The image sensor 9 is a monochrome filter. Image sensor 9 is rectangular, and its actual imaging area is smaller than the effective imaging circle of lens 2. The imaging center of image sensor 9 is located on the optical axis of lens 2 and parallel to the imaging plane of lens 2. Image sensor 9 photoelectrically converts the light rays from the object converged by lens 2 to achieve imaging. The imaging areas of image sensor 9 and lens 2 are matched to ensure image integrity and avoid vignetting. The parallelism between image sensor 9 and the imaging plane of lens 2 ensures no tangential distortion and avoids elongation or distortion of the image.

[0074] To prevent stray light from entering around the photosensitive chip 9, a sealing ring 12 is provided on the end face of the chip shielding ring 407 near the motherboard 5. One end of the sealing ring 12 has an insertion groove, and the other end is a flat end. The end of the chip shielding ring 407 is inserted into the insertion groove, and the flat end of the sealing ring 12 contacts the surface of the motherboard 5. Specifically, the sealing ring 12 is made of opaque rubber. The sealing ring 12 wraps around the outside of the photosensitive chip 9 and is made of opaque material, ensuring the dustproof and waterproof performance of the area between the tail end of the lens 2 and the photosensitive chip 9, while also preventing light from leaking into the area of ​​the photosensitive chip 9 from the space structure between the bracket 4 and the lower shell 6. The sealing ring 12 wraps around the bottom end of the chip shielding ring 407 and is pressed onto the motherboard 5. The properties of its rubber material reduce the stress of the chip shielding ring 407 on the motherboard 5 around the photosensitive chip 9, avoiding stress concentration that could cause the photosensitive chip 9 to develop a tangential tilt angle.

[0075] To improve the sealing performance at the connection between the bracket 4 and the upper shell 1, a first male lip 401 is provided at the connection point. The bottom end of the first male lip 401 is located near the outer side of the bracket 4. A first female lip 103 is provided at the connection point between the upper shell 1 and the bracket 4, and the first female lip 103 is fitted with the first male lip 401. To reduce light leakage into the structure through the connection point between the bracket 4 and the upper shell 1, the top end of the first female lip 103 is fitted with the bottom end of the first male lip 401 with zero clearance, and the bottom end of the first female lip 103 is fitted with the top end of the first male lip 401 with zero clearance. By adopting the zero-close fit between the top and bottom ends of the first female lip 103 and the first male lip 401, and by setting their top ends offset to form a shielding wall, external light can be effectively prevented from leaking into the camera. To ensure the reliability of the connection between the bracket 4 and the upper shell 1, a first protrusion 106 is provided on the inner side of the first female lip 103, such as... Figure 4 As shown. When the bracket 4 is connected to the upper shell 1, the outer sides of the first protrusion 106 and the first male lip 401 are crushed into contact, thereby ensuring the stability of the bracket 4 after assembly with the upper shell 1, avoiding shaking after assembly, and preventing the camera from making abnormal noise under vibration.

[0076] In one embodiment, the first protrusion 106 is provided with eight protrusions, such as... Figure 4 As shown, the upper shell 1 has a rectangular structure, and two first protrusions 106 are provided at the corner of each upper shell 1, with the two first protrusions 106 located on both sides of the corner.

[0077] To improve the sealing performance at the connection between the bracket 4 and the lower shell 6, a second female lip 411 is provided at the connection point. The bottom end of the second female lip 411 is located close to the inner side of the bracket 4. A second male lip 601 is provided at the connection point between the lower shell 6 and the bracket 4. The second female lip 411 and the second male lip 601 are fitted together. The top end of the second female lip 411 and the bottom end of the second male lip 601 are fitted with zero clearance, and the bottom end of the second female lip 411 and the top end of the second male lip 601 are fitted with zero clearance. By adopting the zero-close fit between the top and bottom ends of the second female lip 411 and the second male lip 601, and by setting their top ends offset to form a shielding wall, external light can be effectively prevented from leaking into the camera. To ensure the reliability of the connection between the bracket 4 and the lower shell 6, a second protrusion (not shown in the figure) can also be provided on the inner side of the second female lip 411. When the bracket 4 is connected to the lower shell 6, the outer side of the second protrusion and the second male lip 601 are crushed into contact, thereby ensuring the stability of the bracket 4 and the lower shell 6 after assembly and avoiding shaking after connection.

[0078] The camera of this utility model achieves an IP50 protection rating by setting male and female lips for mate installation at the connection between the housing and the bracket.

[0079] To dissipate the heat generated by the LED chip 7 through the bracket 4, a support boss 408 is provided on the bracket 4 at the position corresponding to the LED chip 7, such as... Figure 2 and Figure 7 As shown, a thermally conductive pad 11 is provided on the surface of the lamp panel 3 near the bracket 4. The thermally conductive pad 11 contacts the supporting boss 408, and the position of the thermally conductive pad 11 corresponds to the position of the lamp beads 7. The number of thermally conductive pads 11 is the same as the number of lamp beads 7. In this embodiment, there are two lamp beads 7 and two thermally conductive pads 11. The two thermally conductive pads 11 correspond to the two lamp beads 7, so that the working heat of the lamp beads 7 is concentrated and conducted to the bracket 4, and the heat is released to the outside through the bracket 4. In order to reduce the thickness requirement of the thermally conductive pad 11, the material of the thermally conductive pad 11 is insulating silicone.

[0080] To ensure the proper placement of the lamp panel 3 and the bracket 4, the lamp panel 3 is provided with a first limiting hole 302, and the bracket 4 is provided with a first limiting post 403 on the surface near the lamp panel 3. Figure 1 and Figure 2 As shown, the first limiting post 403 is correspondingly disposed with the first limiting hole 302. In one embodiment, as... Figure 7As shown, there are two first limiting posts 403, positioned diagonally opposite each other on the bracket 4. Correspondingly, there are two first limiting holes 302. The bracket 4 also has clearance through holes 404, which are through-hole structures on the main body of the bracket 4. A first indirect connector 303 is located on the surface of the lamp board 3 near the main body of the bracket 4. A second indirect connector 502 is located on the surface of the main board 5 near the main body of the bracket 4. The second indirect connector 502 passes through the clearance through hole 404 and engages with the first indirect connector 303. A Fakra connector 15 is located on the side of the main board 5 near the lower shell 6. The camera receives power input and data output through the Fakra connector 15. The second indirect connector 502 supplies the power introduced by the Fakra connector 15 to the lamp board 3 through the first indirect connector 303. The Fakra connector 15 connects the camera system to external power and transmits control signals. Through the first board indirect plug 303 and the second board indirect plug 502, current and control signals are transmitted from the main board 5 to the lamp board 3. Then, through the Fakra connector 15, image data signals are output to the back end to complete the signal interaction.

[0081] To facilitate connection of the lamp board 3, the bracket 4 has a first connecting threaded hole 405 on its surface near the lamp board 3. The lamp board 3 is fixedly connected to the first connecting threaded hole 405 by a first connecting screw 8, thereby realizing the connection between the lamp board 3 and the bracket 4. Specifically, there are two first connecting threaded holes 405, which are symmetrically arranged about the first lens hole 402.

[0082] To ensure the proper mounting position of the motherboard 5 and the bracket 4, a second limiting post 412 is provided on the surface of the bracket 4 near the motherboard 5, such as... Figure 8 As shown, correspondingly, the motherboard 5 is provided with a second limiting hole 501. In order to ensure the reliability of the limiting, two second limiting posts 412 are provided, which are respectively located at opposite corners of the bracket 4, and two second limiting holes 501 are also provided accordingly.

[0083] The lower shell 6 is connected to the bracket 4 by a second connecting screw 10, which also limits the positioning of the motherboard 5. Specifically, the bracket 4 has a second connecting threaded hole 410 on its surface near the lower shell 6, a connecting through hole 602 corresponding to the second connecting threaded hole 410 on the lower shell 6, and a clearance notch 503 corresponding to the second connecting threaded hole 410 on the motherboard 5. During installation, the second connecting screw 10 passes through the connecting through hole 602 and the clearance notch 503 sequentially before connecting into the second connecting threaded hole 410. To improve connection reliability, four second connecting threaded holes 410 are provided, corresponding to four second connecting screws 10. The clearance notch 503 is located at the corner of the motherboard 5 to prevent it from interfering with the normal operation of the motherboard 5.

[0084] To improve the connection reliability between the upper shell 1 and the bracket 4, the upper shell 1 is provided with a locking hole, and the bracket 4 is provided with a locking block 409 at the position corresponding to the locking hole, and the locking block 409 is locked into the locking hole.

[0085] The non-transparent part 102 is made of PC and ABS material, while the transparent part 101 is made of PC material, allowing near-infrared light of 940nm to pass through with a transmittance of ≥85%. The LED 7 is a near-infrared lamp with a wavelength of 940nm and an illumination range of 50°. The transparent part 101 uses near-infrared PC material to ensure that the near-infrared light from the LED 7 can illuminate the surrounding environment, while also ensuring that the near-infrared light can be reflected back into the lens 2 for imaging, thus achieving active reflective imaging. Furthermore, the transparent part 101 can block other types of light from the vehicle interior environment, except for near-infrared light, from entering the lens 2, preventing uneven image brightness and affecting object imaging. The non-transparent part 102 uses PC and ABS material to limit the area of ​​light entering the camera product, preventing light other than the light converged by the lens 2 from shining into the camera and affecting imaging. The bracket 4 and lower shell 6 are made of ADC12 material. The surfaces of the bracket 4 and lower shell 6 are black to reduce structural reflectivity or refractive index and reduce stray light propagation.

[0086] In one embodiment, the surface of the lamp panel 3 is coated with a black matte insulating ink layer to reduce light reflection between the inner wall of the upper shell 1 and the lamp panel 3, thereby reducing stray light propagation. The lamp beads 7 use near-infrared lamps with a wavelength of 940nm. The light is outside the range of human vision and will not be captured by the driver to distract them. Moreover, near-infrared light has a long propagation distance, ensuring that the lamp beads inside the vehicle can provide stable supplementary lighting for the driver. The illumination range of the two lamp beads 7 is 50°, which can ensure the ambient brightness of the field of view of the lens 2. The appropriate illumination range reduces the amount of light propagating between the upper shell 1 and the lamp panel 3.

[0087] This invention relates to a light-leakage-proof vehicle-mounted camera that prevents non-imaging light from leaking to the lens 2 and photosensitive chip 9, thereby avoiding bright spots on the screen, localized or overall whitening of the image, and decreased contrast. Furthermore, the lamp plate 3, bracket 4, and lower shell 6 are made of black material or have a black surface treatment to reduce structural reflectivity or refractive index, thus reducing stray light propagation. The lens 2 is fixed to the end face of the first lens hole 402 using a black UV adhesive layer 13, preventing light from entering the first lens hole 402 through the adhesive layer. The light-blocking frame 14 effectively prevents invalid imaging light from entering the lens 2 through reflection and refraction, preventing stray light from entering the lens 2 and causing camera performance failure. By setting the first lens hole 402 and the sealing ring 12, invalid light leakage into the photosensitive chip 9 is effectively prevented, preventing stray light from entering the photosensitive chip 9 and causing camera performance failure.

[0088] When the light-leakage-proof vehicle camera of this utility model is in use, in both day and night environments, the near-infrared light from the two LED beads 7 penetrates the light-transmitting part 101 of the upper shell 1 and is emitted into the external environment, illuminating the driver's face. The reflected light from the face passes through the light-transmitting part 101 of the upper shell 1 and enters the lens 2, thereby focusing on the photosensitive chip 9 for photoelectric conversion to produce a black and white image, which is then used by the backend for face recognition analysis. The light-blocking frame 14 on the inner side of the upper shell 1 prevents non-imaging light from leaking into the lens 2. The structure of the first lens hole 402 and the sealing ring 12 on the bracket 4 controls the leakage of non-imaging light into the photosensitive chip 9. The Fakra connector 15 connects to external power and control signals, enabling the power and control signals to be transmitted from the main board 5 to the lamp board 3 via the connector, and then outputting image data signals to the backend via the Fakra connector 15.

[0089] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this solution.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this solution, "multiple" means two or more, unless otherwise explicitly specified.

[0091] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this 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 this invention. Therefore, this 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 light-leakage-proof vehicle-mounted camera, comprising an upper shell, a bracket, and a lower shell connected in sequence, wherein a light board is disposed between the upper shell and the bracket, a main board is disposed between the bracket and the lower shell, a lens is mounted on the bracket, and LEDs are mounted on the light board, characterized in that, The upper shell includes a light-transmitting part and a non-light-transmitting part. The lens and the lamp bead are arranged corresponding to the light-transmitting part. The non-light-transmitting part is arranged around the light-transmitting part. A light-blocking frame is arranged around the lens. One end of the light-blocking frame is arranged on the inner side of the upper shell, and the other end is arranged on the surface of the lamp plate near the upper shell. The light-blocking frame is arranged between the lens and the lamp bead.

2. The anti-light leakage vehicle camera according to claim 1, characterized in that, The light-blocking frame includes a first light-blocking rib, a second light-blocking rib, and a third light-blocking rib connected together. Each of the first light-blocking rib, the second light-blocking rib, and the third light-blocking rib includes a connecting platform and a main rib connected together. The connecting platform is embedded in the upper shell, and the end of the main rib away from the upper shell is provided with a crushing rib.

3. The anti-light leakage vehicle camera according to claim 2, characterized in that, The light-blocking frame also includes the side wall of the non-transparent part near the light-transmitting part, and the first light-blocking rib, the second light-blocking rib, the third light-blocking rib and the side wall of the non-transparent part near the light-transmitting part are arranged to form the light-blocking frame. The first light-shielding rib and the second light-shielding rib also include a base platform, which is disposed between the connecting platform and the main rib plate, and the width of the base platform is greater than the thickness of the main rib plate.

4. The anti-light leakage vehicle camera according to claim 2 or 3, characterized in that, The main stiffening plate is provided with a base column along the height direction, and the base column extends from the bottom to the top of the main stiffening plate; The base columns are provided on both sides of the main stiffening plate, and the base columns provided on both sides of the main stiffening plate are arranged symmetrically or asymmetrically. The thickness at the bottom of the main stiffening plate is greater than the thickness at the top of the main stiffening plate.

5. The anti-light leakage vehicle camera according to claim 1, characterized in that, The bracket is provided with a first lens hole for mounting the lens. The height of the top surface of the first lens hole is higher than the surface height of the lamp plate after installation. The lens is fixedly connected to the top surface of the hole. The lens is provided with a connecting ring platform, which is fixedly connected to the top surface of the aperture platform by a black UV adhesive layer.

6. The anti-light leakage vehicle camera according to claim 5, characterized in that, A chip shielding ring is provided on the surface of the bracket near the lower shell. The chip shielding ring is arranged around the photosensitive chip mounted on the motherboard. A light-transmitting hole is provided at the bottom of the chip shielding ring. The light-transmitting hole is coaxially connected with the first lens hole. The light-transmitting hole is corresponding to the photosensitive chip. The size of the light-transmitting hole is larger than the size of the photosensitive chip.

7. The anti-light leakage vehicle camera according to claim 6, characterized in that, A sealing ring is provided on the end face of the chip shielding ring platform near the motherboard. One end of the sealing ring is provided with an insertion ring groove, and the other end is a flat end. The chip shielding ring platform is inserted into the insertion ring groove, and the flat end of the sealing ring contacts the motherboard. The sealing ring is made of opaque rubber.

8. The anti-light leakage vehicle camera according to claim 1, characterized in that, A first male lip is provided at the position where the bracket connects to the upper shell, and the bottom end of the first male lip is located near the outer side of the bracket. A first female lip is provided at the position where the upper shell connects to the bracket, and the first female lip is configured to cooperate with the first male lip. The top of the first female lip is fitted with the bottom of the first male lip with zero clearance, and the bottom of the first female lip is fitted with the top of the first male lip with zero clearance. The inner surface of the first female lip is provided with a first protrusion.

9. The anti-light leakage vehicle camera according to claim 1, characterized in that, A second female lip is provided at the position where the bracket connects to the lower shell, and the bottom end of the second female lip is located near the inner side of the bracket. A second male lip is provided at the position where the lower shell connects to the bracket, and the second female lip and the second male lip are configured to cooperate with each other. The top of the second female lip is fitted with the bottom of the second male lip with zero clearance, and the bottom of the second female lip is fitted with the top of the second male lip with zero clearance. The inner surface of the second female lip is provided with a second protrusion.

10. The anti-light leakage vehicle camera according to claim 1, characterized in that, The surface of the lamp panel is coated with a black matte insulating ink layer; The LED is a near-infrared LED. The light-transmitting part is a PC material structure that can transmit near-infrared light.

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