Vehicle-mounted digital camera

Abstract

The utility model discloses a vehicle-mounted digital camera, and belongs to the technical field of vehicle-mounted electronic equipment. The vehicle-mounted digital camera is used for being arranged on a vehicle frame and comprises a shell, a circuit board is arranged in the shell, the circuit board is electrically connected with the shell through a connecting piece, and a connector extending out of the shell is arranged on the circuit board; the grounding assembly is provided with a first end and a second end which are opposite, the first end is electrically connected with the connecting piece and / or the connector, and the second end is used for being electrically connected with a frame. Thus, a near-end grounding path of the digital camera is constructed through the grounding assembly, static electricity is guided to the vehicle frame in time, and a low-impedance path is provided for electrostatic discharge of the digital camera, so that interference of the static electricity to signals in the digital camera is reduced, the electrostatic protection capability is improved, and the working stability of the digital camera in a real vehicle is guaranteed.

Description

Technical Field

[0001] This application belongs to the field of vehicle electronic equipment technology, specifically relating to a vehicle digital camera. Background Technology

[0002] With the continuous development of automotive electronics technology, in-vehicle digital cameras are widely used in fields such as driving recording, driver assistance, and autonomous driving.

[0003] However, in practical applications, due to the long wiring in actual vehicles, vehicle-mounted digital cameras, especially those using SerDes (Serializer / Deserializer) technology, often face the problem of poor electrostatic interference resistance, which can easily lead to abnormal phenomena such as black screen and screen distortion, affecting the normal operation of the camera and posing a potential threat to driving safety.

[0004] Therefore, it is necessary to improve the electrostatic protection capabilities of vehicle-mounted digital cameras. Utility Model Content

[0005] Purpose of the utility model: This application provides a vehicle-mounted digital camera to improve the electrostatic protection capability of the vehicle-mounted digital camera.

[0006] This application provides a vehicle-mounted digital camera, which is used for mounting on a vehicle frame, and the vehicle-mounted digital camera includes:

[0007] The housing has a circuit board inside, which is electrically connected to the housing via a connector, and the circuit board has a connector that extends out of the housing.

[0008] The grounding assembly has a first end and a second end opposite to each other, the first end being electrically connected to a connector and / or a connector, and the second end being used for electrical connection to a vehicle frame.

[0009] In some embodiments, the first end is electrically connected to the connector, and the grounding component includes:

[0010] The first grounding wire has one end as the first end and the other end as the first terminal, which is the second end.

[0011] In some embodiments, the first grounding wire has a length L1 and a wire diameter S1, satisfying: 0 < L1 ≤ 10 cm, S1 ≥ 2.5 mm. 2 .

[0012] In some embodiments, the first terminal is a circular cold-pressed terminal, the frame has a connection hole, and the grounding assembly further includes a first fastener, which passes through the circular cold-pressed terminal and the connection hole.

[0013] In some embodiments, the first end is electrically connected to the connector, and the grounding component includes:

[0014] The second grounding wire has a conductive surface. One end of the second grounding wire is the first end, and the other end of the second grounding wire is provided with an adapter. The second end is located on the side of the second grounding wire closer to the adapter.

[0015] The first adapter cable is connected to the second grounding wire via an adapter.

[0016] In some embodiments, the second grounding wire between the first end and the second end has a length L2, satisfying: 0 < L2 ≤ 20 cm.

[0017] In some embodiments, the grounding component further includes a fixing member, and the second end is connected to the vehicle frame via the fixing member.

[0018] In some embodiments, the first end is electrically connected to the connector, and the grounding component includes:

[0019] The second adapter cable has one end being the first end, and the other end of the second adapter cable is equipped with pins.

[0020] The third grounding wire has one end connected to the pin and the other end of the third grounding wire is provided with a second terminal, which is the second end.

[0021] In some embodiments, the second adapter cable has a length L3, satisfying: 0 < L3 ≤ 20 cm.

[0022] In some embodiments, the second terminal is a circular cold-pressed terminal, the frame has a connection hole, and the grounding assembly also includes a second fastener, which passes through the circular cold-pressed terminal and the connection hole.

[0023] Beneficial Effects: Compared with the prior art, the vehicle-mounted digital camera provided in this application embodiment is used to mount on a vehicle frame. The vehicle-mounted digital camera includes: a housing, a circuit board disposed inside the housing, the circuit board being electrically connected to the housing via a connector, and a connector extending out of the housing on the circuit board; and a grounding component having a first end and a second end opposite to each other, the first end being electrically connected to the connector and / or the connector, and the second end being used for electrical connection to the vehicle frame. Thus, a near-end grounding path for the digital camera is constructed through the grounding component, promptly guiding static electricity to the vehicle frame, providing a low-impedance path for the electrostatic discharge of the digital camera, reducing interference from static electricity on the signal inside the digital camera, improving electrostatic protection capability, and ensuring the working stability of the digital camera in a real vehicle. Attached Figure Description

[0024] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the structure of an in-vehicle digital camera provided in an embodiment of this application;

[0026] Figure 2 Another structural schematic diagram of the vehicle-mounted digital camera provided in the embodiments of this application;

[0027] Figure 3 This is another structural schematic diagram of an in-vehicle digital camera provided in an embodiment of this application;

[0028] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0029] Figure 5 A cross-sectional schematic diagram of the second adapter cable in the vehicle-mounted digital camera provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of an electrostatic test bench for an in-vehicle digital camera provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100 - Housing;

[0033] 200 - Circuit board;

[0034] 300-Connector;

[0035] 400-Connector;

[0036] 500 - Grounding component; 510 - First terminal; 520 - Second terminal;

[0037] 531 - First grounding wire; 532 - First terminal block; 533 - First fastener;

[0038] 541-Second grounding wire; 5411-Conductive surface; 542-First adapter wire; 543-Adapter; 544-Fixing component;

[0039] 551-Second adapter wire; 5511-Shielding layer; 5512 Polyvinyl chloride layer; 5513-Tinized copper wire layer; 5514-Aluminum foil shielding layer; 5515-Polyethylene layer; 5516-Stranded copper wire layer; 552-Pin; 553-Third grounding wire; 554-Second terminal block; 555-Second fastener;

[0040] 600 - Frame; 610 - Connection hole

[0041] 700 - Electrostatic test bench; 710 - First path; 711 - First section adapter cable; 712 - Second section adapter cable; 713 - Third section adapter cable; 714 - Fourth section adapter cable; 715 - Main unit; 720 - Second path. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0044] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0045] This application provides an embodiment of a vehicle-mounted digital camera; please refer to [link / reference]. Figures 1 to 3 , Figure 1 This illustration shows a structural diagram of an in-vehicle digital camera provided in an embodiment of this application; Figure 2 This illustration shows another structural diagram of the vehicle-mounted digital camera provided in an embodiment of this application; Figure 3This illustration shows another structural diagram of the vehicle-mounted digital camera provided in this application embodiment. The vehicle-mounted digital camera is used to mount on a vehicle frame 600 and includes a housing 100 and a grounding component 500. A circuit board 200 is disposed inside the housing 100. The circuit board 200 is electrically connected to the housing 100 via a connector 300, and a connector 400 extending out of the housing 100 is provided on the circuit board 200. The grounding component 500 has a first end 510 and a second end 520, the first end 510 being electrically connected to the connector 300 and / or the connector 400, and the second end 520 being electrically connected to the vehicle frame 600.

[0046] Specifically, in this embodiment, the grounding component 500 is electrically connected to the connector 300 and / or the connector 400 via its first end 510, and to the vehicle frame 600 via its second end 520, thus forming an effective near-end ground. In this way, static electricity generated by the vehicle-mounted digital camera can be quickly discharged through the vehicle frame 600, preventing static interference with high-speed signal transmission within the camera and reducing image abnormalities caused by static electricity at the source.

[0047] Please refer to it again. Figure 1 In some embodiments, the first end 510 is electrically connected to the connector 300, and the grounding component 500 includes: a first grounding wire 531, one end of the first grounding wire 531 is the first end 510, and the other end of the first grounding wire 531 is provided with a first terminal 532, which is the second end 520.

[0048] Specifically, one end of the first grounding wire 531 is electrically connected to the connector 300, which can be a fastener such as a screw, to directly fix the first grounding wire 531 to the housing 100. Simultaneously, the circuit board 200 is directly connected to the grounding assembly 500. Static electricity is discharged sequentially through the housing 100, connector 300, circuit board 200, connector 300, housing 100, first grounding wire 531, and frame 600, providing a low-impedance, stable conduction path for electrostatic discharge. The other end of the first grounding wire 531 is electrically connected to the frame 600 through the first terminal block 532, ensuring tight contact between the grounding assembly 500 and the frame 600. This allows static electricity to be quickly and smoothly conducted into the frame 600, ensuring the reliability of the vehicle-mounted digital camera's grounding through the grounding assembly 500. Furthermore, the use of the first terminal block 532 in this application allows for quick connection to the frame 600 during installation without complex operations or specialized tools, reducing installation difficulty and improving assembly efficiency. During later maintenance and repair, if it is necessary to disassemble or replace the grounding component 500, the first terminal 532 can be quickly separated from the frame 600, which facilitates the troubleshooting and resolution of related faults of the grounding component 500 and reduces maintenance costs and time costs.

[0049] Please refer to it again. Figure 1 In some embodiments, the first grounding wire 531 has a length L1 and a wire diameter S1, satisfying: 0 < L1 ≤ 10 cm, S1 ≥ 2.5 mm. 2 .

[0050] Specifically, the length L1 of the first grounding wire 531 can be any one or a range between any two of 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, and 10cm. By limiting the length of the first grounding wire 531, its own resistance is reduced, allowing static electricity to be conducted more quickly to the vehicle frame 600, improving static discharge efficiency, reducing static residue inside the vehicle-mounted digital camera, and reducing interference from static electricity to the circuit board 200 and electronic components. Simultaneously, the wire diameter of the first grounding wire 531 is greater than or equal to 2.5mm. 2 It can carry a larger current by using a thicker wire diameter. When a large current is generated by the instantaneous release of static electricity, it can prevent the first grounding wire 531 from overheating or being damaged due to overload, thus ensuring the continuous and stable operation of the first grounding wire 531, maintaining the stability of signal transmission in the vehicle-mounted digital camera, and preventing abnormalities in the image.

[0051] Please refer to it again. Figure 1 In some embodiments, the first terminal 532 is a circular cold-pressed terminal, the frame 600 has a connection hole 610, and the grounding assembly 500 also includes a first fastener 533, which passes through the circular cold-pressed terminal and the connection hole 610.

[0052] Specifically, the circular cold-pressed terminal, also known as an OT terminal, possesses excellent mechanical strength and electrical connection performance. Through a cold-pressing process, it is tightly bonded to the first grounding wire 531, forming a reliable electrical path. Furthermore, the first fastener 533, inserted into the connection hole 610 between the circular cold-pressed terminal and the frame 600, securely fixes the grounding component 500 to the frame 600. This ensures that during vehicle operation, under complex conditions such as bumps and vibrations, the connection between the grounding component 500 and the frame 600 will not loosen or detach, maintaining a stable low-impedance grounding path. This ensures that static electricity can be continuously and effectively discharged to the frame 600, improving the reliability of the vehicle-mounted digital camera.

[0053] Please see Figure 2This application provides an in-vehicle digital camera, which is installed on a vehicle frame 600. The in-vehicle digital camera includes a housing 100 and a grounding component 500. A circuit board 200 is disposed inside the housing 100. The circuit board 200 is electrically connected to the housing 100 via a connector 300, and a connector 400 extending out of the housing 100 is provided on the circuit board 200. The grounding component 500 has a first end 510 and a second end 520, which are electrically connected to the connector 400 and to the vehicle frame 600, respectively.

[0054] Specifically, in this embodiment, the grounding component 500 is electrically connected to the connector 400 via its first end 510 and to the vehicle frame 600 via its second end 520, thus forming an effective near-end ground. In this way, static electricity generated by the vehicle-mounted digital camera can be quickly discharged through the vehicle frame 600, preventing static interference with high-speed signal transmission within the camera and reducing image abnormalities caused by static electricity at the source.

[0055] In some embodiments, the grounding assembly 500 includes a second grounding wire 541, an adapter 543, and a first adapter wire 542. The second grounding wire 541 has a conductive surface 5411, one end of the second grounding wire 541 is a first end 510, the other end of the second grounding wire 541 is provided with the adapter 543, and a second end 520 is located on the side of the second grounding wire 541 near the adapter 543; the first adapter wire 542 is connected to the second grounding wire 541 through the adapter 543.

[0056] Specifically, in this embodiment, the conductive surface 5411 of the second grounding wire 541 can be directly connected to the connector 400 to form a low-impedance electrostatic discharge channel. It should be noted that the second end 520 is located on the side of the second grounding wire 541 near the adapter 543. This means that the second end 520 is set on the second grounding wire 541 and close to the adapter 543. The electrostatic conduction path on the second grounding wire 541 is not the complete second grounding wire 541, but rather the second grounding wire 541 between the first end 510 and the second end 520. After the electrostatic discharge reaches the second end 520, it directly enters the frame 600 and will not continue to propagate through the remaining second grounding wire 541. Thus, when electrostatic interference occurs, the electrostatic energy can be quickly guided to the frame 600 through the second grounding wire 541, effectively reducing the impact of electrostatic discharge on the circuit board 200. Especially for high-speed signals (such as SerDes signals), this direct grounding design can reduce interference, avoid abnormal image phenomena, and improve the stability and reliability of the vehicle-mounted digital camera.

[0057] Furthermore, in a vehicle-mounted environment, space is limited and wiring is complex. The combined design of the second grounding wire 541 and the adapter 543 makes the installation of the grounding assembly 500 more convenient. Installers can first connect the second grounding wire 541 to the connector 400, and then flexibly adjust the position of the second end 520 on the first adapter wire 542 to complete the connection with the vehicle frame 600, reducing the difficulty of operation. In later maintenance, if the grounding assembly 500 needs to be replaced or repaired, the components can be separated simply by disassembling the adapter 543, improving maintenance efficiency.

[0058] Please refer to it again. Figure 2 In some embodiments, the second grounding wire 541 between the first end 510 and the second end 520 has a length L2, satisfying: 0 < L2 ≤ 20 cm.

[0059] Specifically, the length L2 of the second grounding wire 541 between the first end 510 and the second end 520 can be any one or any two of the following: 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm, and 20cm. Given a fixed material and wire diameter for the second grounding wire 541, a shorter length L2 effectively reduces the resistance of the second grounding wire 541 itself. A low-resistance second grounding wire 541 allows for less loss during static discharge, more quickly conducting static electricity into the frame 600, reducing static electricity residue inside the vehicle-mounted digital camera, lowering the risk of static electricity interference to the circuit board 200 and other electronic components, and enhancing the electrostatic discharge protection capability of the vehicle-mounted digital camera. Especially for high-speed signals (such as SerDes signals) transmitted by vehicle-mounted digital cameras, it helps maintain signal integrity and stability, avoids abnormal phenomena such as screen flickering and distorted images caused by electromagnetic interference, and ensures the reliable operation of vehicle-mounted digital cameras.

[0060] Please refer to it again. Figure 2 In some embodiments, the grounding assembly 500 further includes a fixing member 544, through which the second end 520 is connected to the frame 600.

[0061] Specifically, the fastener 544 securely connects the second end 520 to the frame 600, ensuring the continuity and stability of the grounding path. During vehicle operation, even under external forces such as vibration and bumps, it prevents the connection between the grounding component 500 and the frame 600 from loosening or detaching, ensuring that static electricity and other charges can be reliably conducted to the frame 600 through the grounding component 500, effectively protecting the vehicle-mounted digital camera and other electronic equipment from electrostatic discharge. Furthermore, the fastener 544 facilitates the installation and removal of the grounding component 500. During installation, the second end 520 can be quickly and accurately fixed to the designated position on the frame 600, improving installation efficiency. When maintenance or repair of the vehicle-mounted digital camera or the grounding component 500 is required, the fastener 544 can be easily removed for inspection, replacement, or repair, reducing maintenance costs and difficulty.

[0062] Please see Figure 3 This application provides an in-vehicle digital camera, which is installed on a vehicle frame 600. The in-vehicle digital camera includes a housing 100 and a grounding component 500. A circuit board 200 is disposed inside the housing 100. The circuit board 200 is electrically connected to the housing 100 via a connector 300, and a connector 400 extending out of the housing 100 is provided on the circuit board 200. The grounding component 500 has a first end 510 and a second end 520, which are electrically connected to the connector 400 and to the vehicle frame 600, respectively.

[0063] Specifically, in this embodiment, the grounding component 500 is electrically connected to the connector 400 via its first end 510 and to the vehicle frame 600 via its second end 520, thus forming an effective near-end ground. In this way, static electricity generated by the vehicle-mounted digital camera can be quickly discharged through the vehicle frame 600, preventing static interference with high-speed signal transmission within the camera and reducing image abnormalities caused by static electricity at the source.

[0064] Please refer to it again. Figure 3 In some embodiments, the grounding component 500 includes: a second adapter wire 551, a pin 552, and a third grounding wire 553. One end of the second adapter wire 551 is a first end 510, and the other end of the second adapter wire 551 is provided with a pin 552; one end of the third grounding wire 553 is connected to the pin 552, and the other end of the third grounding wire 553 is provided with a second terminal 554, which is a second end 520.

[0065] Specifically, the second adapter cable 551 is connected to the third grounding wire 553 via pin 552, forming a segmented grounding structure. This allows the grounding path to be flexibly adjusted according to the internal spatial layout of the vehicle-mounted digital camera, effectively shortening the electrostatic discharge path. This reduces resistance and energy loss during electrostatic transmission, enabling electrostatic discharge to be conducted more quickly to the vehicle frame 600 via the second terminal 554. This enhances the camera's electrostatic protection capability and reduces image abnormalities caused by electrostatic interference.

[0066] Pin 552 provides a robust electrical connection between the second adapter wire 551 and the third grounding wire 553. The excellent mechanical strength and vibration resistance of pin 552 effectively resist bumps and vibrations generated during vehicle operation, ensuring that the grounding assembly 500 maintains a stable electrical connection under complex operating conditions. This reduces the risk of grounding failure due to loose connections and guarantees the long-term stable operation of the vehicle-mounted digital camera.

[0067] Please see Figure 4 and Figure 5 , Figure 4 It indicated Figure 3 A magnified view of a portion of region A in the middle; Figure 5 This illustration shows a cross-sectional view of the second adapter cable 551 in the vehicle-mounted digital camera provided in this application embodiment. The surface of the second adapter cable 551 in this application is provided with a shielding layer 5511, which can prevent the second adapter cable 551 from making electrical contact with external objects, avoiding short circuits and leakage. To further ensure the performance of the second adapter cable 551, this application can select the structure and size of the second adapter cable 551 according to actual usage. For example, the cross-section of the second adapter cable 551, from the outside to the inside, includes: a polyvinyl chloride layer 5512 with a dielectric constant of 3.0-3.2 and an outer diameter of 3.3 mm; a tin-plated copper wire layer 5513 with a braiding rate of 90%; an aluminum foil shielding layer 5514, 100%; a polyethylene layer 5515 with a dielectric constant of 2.2-2.4, an outer diameter of 2.1 mm, and a thickness of 0.64 mm; and a stranded copper wire layer 5516 with an outer diameter of 0.825 mm.

[0068] Please refer to it again. Figure 3 In some embodiments, the second adapter cable 551 has a length L3, satisfying: 0 < L3 ≤ 20 cm.

[0069] Specifically, the length L3 of the second adapter cable 551 can be any one or any combination of 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm, and 20cm. Given a fixed material and wire diameter for the second grounding wire 541, a shorter length L2 effectively reduces the resistance of the second grounding wire 541 itself. A low-resistance second grounding wire 541 allows for less loss during static discharge, more quickly conducting static electricity into the frame 600, reducing static electricity residue inside the vehicle-mounted digital camera, lowering the risk of static interference to the circuit board 200 and other electronic components, and enhancing the electrostatic discharge protection capability of the vehicle-mounted digital camera. Especially for high-speed signals transmitted by the vehicle-mounted digital camera (such as SerDes signals), it helps maintain signal integrity and stability, avoiding screen flickering, image distortion, and other abnormal phenomena caused by electromagnetic interference, ensuring reliable operation of the vehicle-mounted digital camera.

[0070] Please refer to it again. Figure 3 In some embodiments, the second terminal 554 is a circular cold-pressed terminal, the frame 600 has a connection hole 610, and the grounding assembly 500 also includes a second fastener 555, which passes through the circular cold-pressed terminal and the connection hole 610.

[0071] Specifically, the circular cold-pressed terminal is connected to the third grounding wire 553 through a cold-pressing process, forming a tight and reliable electrical connection. This effectively reduces contact resistance, minimizes energy loss and heat generation during electrostatic transmission, and ensures that static electricity can be efficiently conducted from the vehicle-mounted digital camera to the vehicle frame 600 via the grounding component 500, protecting the vehicle-mounted digital camera from electrostatic damage. Furthermore, the second fastener 555 passes through the connection hole 610 between the circular cold-pressed terminal and the vehicle frame 600, firmly connecting the grounding component 500 to the vehicle frame 600. The second fastener 555 can withstand external forces such as vibration and bumps generated during vehicle operation, preventing the connection between the grounding component 500 and the vehicle frame 600 from loosening or falling off, ensuring the stability and reliability of the grounding component 500, and providing a stable grounding guarantee for the normal operation of the vehicle-mounted digital camera.

[0072] Please see Figure 6 , Figure 6 This illustration shows a schematic diagram of an electrostatic discharge (ESD) test bench 700 for an in-vehicle digital camera provided in an embodiment of this application. During ESD testing of the in-vehicle digital camera, the test bench is used... Figure 6 The electrostatic test bench 700 simulates the worst wiring harness conditions during testing. Taking a four-section adapter cable as an example, the longest adapter cable can be up to 10 meters.

[0073] When the vehicle-mounted digital camera is not directly connected to the vehicle's outer frame 600, the camera is grounded remotely. Most of the electrostatic energy passes through the shielding layer 5511 of the coaxial SerDes cable to the host unit 715, and is then discharged from the host unit 715 to ground. Figure 6 The first path 710 is also the necessary signal path between the vehicle-mounted digital camera and the host 715. In the first path 710, the distributed capacitance to ground at various locations can serve as a small discharge path, but most of the electrostatic energy can still interfere with the SerDes signal of the vehicle-mounted digital camera, thus causing the vehicle-mounted digital camera to malfunction.

[0074] In this embodiment, the grounding component 500 is electrically connected to the connector 300 and / or the connector 400 via its first end 510, and to the vehicle frame 600 via its second end 520. Most of the electrostatic energy is dissipated through... Figure 6 The second path 720 discharges the electrostatic energy, preventing interference with the SerDes signal. The signal between the vehicle-mounted digital camera and the host 715 is still transmitted through the first path 710. Even if a small amount of electrostatic energy is discharged through the first path 710, it will not interfere with the SerDes signal.

[0075] Please refer to it again. Figure 6 First, set the comparison scale for the vehicle-mounted digital camera. The comparison scale does not have a grounding component of 500. (This is done via...) Figure 6 An electrostatic discharge (ESD) test was conducted on a 700-pair scale using an ESD test bench. The test method was as follows: First adapter cable 711, second adapter cable 712, third adapter cable 713, and fourth adapter cable 714 were set sequentially, with adapter lengths ranging from 1 meter to 10 meters. An ESD test was performed on the vehicle-mounted digital camera. All wiring harnesses (including first adapter cable 711, second adapter cable 712, third adapter cable 713, fourth adapter cable 714, first grounding wire 531, second grounding wire 541, second adapter cable 551, and third grounding wire 553) used Karble 302-3 and Dacar 302-4 wiring harnesses. If a red screen phenomenon occurred, the vehicle-mounted digital camera was considered malfunctioning.

[0076] The test data are shown in Tables 1 and 2 below:

[0077] Table 1

[0078]

[0079]

[0080] Table 2

[0081]

[0082] In Tables 1 and 2 above, the first row of a cell represents the length of each segment of a multi-segment wire harness. For example, "1+1" means 1 meter wire + 1 meter wire = 2 meters wire. The second row of a cell represents the test threshold. For example, 25kV means the threshold is 25kV.

[0083] Please refer to it again. Figure 6 An embodiment of setting up an in-vehicle digital camera includes a grounding component 500. This application is approved by... Figure 6 The electrostatic discharge test bench 700 was used to conduct actual tests on the embodiment. The test method was as follows: the first adapter cable 711, the second adapter cable 712, the third adapter cable 713, and the fourth adapter cable 714 were set sequentially, and the adapter lengths were set sequentially from 1 meter to 10 meters. An air discharge electrostatic discharge test was performed on the vehicle-mounted digital camera. All wiring harnesses (including the first adapter cable 711, the second adapter cable 712, the third adapter cable 713, the fourth adapter cable 714, the first grounding wire 531, the second grounding wire 541, the second adapter cable 551, and the third grounding wire 553) used Karble 302-3 and Dacar 302-4 wiring harnesses. If a red screen phenomenon occurred, the vehicle-mounted digital camera was considered abnormal.

[0084] The test data are shown in Tables 3 and 4 below:

[0085] Table 3

[0086]

[0087] Table 4

[0088]

[0089]

[0090] In Tables 3 and 4 above, the first row of the cell represents the length of each segment of the multi-segment harness; for example, "1+1" means 1 meter of wire + 1 meter of wire = 2 meters of wire. The second row of the cell represents the test threshold; for example, 25kV means the threshold is 25kV.

[0091] As can be seen from the measured data in Tables 1, 2, 3 and 4, after the near-end grounding of the vehicle-mounted digital camera is achieved by the grounding component 500 in this embodiment of the application, the criterion level of the vehicle-mounted digital camera is improved from 2kV to 25kV in the case of a 10-meter long wiring harness, which is a very significant improvement in the electrostatic performance of the vehicle-mounted digital camera and the actual vehicle.

[0092] In summary, this application constructs a near-end grounding path for the digital camera through the grounding component 500, promptly guiding static electricity to the frame 600, providing a low-impedance path for the electrostatic discharge of the digital camera, thereby reducing the interference of static electricity on the signal inside the digital camera, improving electrostatic protection capability, and ensuring the working stability of the digital camera in the actual vehicle.

[0093] The above provides a detailed description of a vehicle-mounted digital camera provided in the embodiments of this application. Specific examples have been used in this application to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A vehicle-mounted digital camera, characterized in that, The vehicle-mounted digital camera is used to mount on the vehicle frame (600), and the vehicle-mounted digital camera includes: A housing (100) is provided inside the housing (100), and the circuit board (200) is electrically connected to the housing (100) via a connector (300). A connector (400) extending out of the housing (100) is provided on the circuit board (200). The grounding assembly (500) has a first end (510) and a second end (520) opposite to each other, the first end (510) being electrically connected to the connector (300) and / or the connector (400), and the second end (520) being electrically connected to the frame (600).

2. The vehicle-mounted digital camera according to claim 1, characterized in that, The first end (510) is electrically connected to the connector (300), and the grounding assembly (500) includes: A first grounding wire (531) is provided at one end, which is the first end (510), and the other end of the first grounding wire (531) is provided with a first terminal (532), which is the second end (520).

3. The vehicle-mounted digital camera according to claim 2, characterized in that, The first grounding wire (531) has a length L1 and a wire diameter S1, satisfying: 0 < L1 ≤ 10 cm, S1 ≥ 2.5 mm. 2 .

4. The vehicle-mounted digital camera according to claim 2, characterized in that, The first terminal (532) is a circular cold-pressed terminal, the frame (600) has a connection hole (610), and the grounding assembly (500) also includes a first fastener (533), which passes through the circular cold-pressed terminal and the connection hole (610).

5. The vehicle-mounted digital camera according to claim 1, characterized in that, The first end (510) is electrically connected to the connector (400), and the grounding assembly (500) includes: A second grounding wire (541) has a conductive surface. One end of the second grounding wire (541) is the first end (510). The other end of the second grounding wire (541) is provided with an adapter (543). The second end (520) is located on the side of the second grounding wire (541) close to the adapter (543). The first adapter wire (542) is connected to the second ground wire (541) via the adapter (543).

6. The vehicle-mounted digital camera according to claim 5, characterized in that, The second grounding wire (541) between the first end (510) and the second end (520) has a length L2, satisfying: 0 < L2 ≤ 20 cm.

7. The vehicle-mounted digital camera according to claim 5, characterized in that, The grounding assembly (500) further includes a fixing member (544), through which the second end (520) is connected to the frame (600).

8. The vehicle-mounted digital camera according to claim 1, characterized in that, The first end (510) is electrically connected to the connector (400), and the grounding assembly (500) includes: The second adapter cable (551) has one end being the first end (510) and the other end being provided with a pin (552). A third grounding wire (553) is provided, one end of which is connected to the pin (552), and the other end of which is provided with a second terminal (554), which is the second end (520).

9. The vehicle-mounted digital camera according to claim 8, characterized in that, The second adapter cable (551) has a length L3, which satisfies: 0 < L3 ≤ 20cm.

10. The vehicle-mounted digital camera according to claim 8, characterized in that, The second terminal (554) is a circular cold-pressed terminal. The frame (600) has a connection hole (610). The grounding assembly (500) also includes a second fastener (555), which passes through the circular cold-pressed terminal and the connection hole (610).

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