A dashcam

Abstract

This utility model relates to the field of dashcam technology, specifically to a dashcam comprising a PCB motherboard, a first shielding cover, a second shielding cover, a first filter capacitor, and a second filter capacitor. By respectively placing a first heat-conducting component and a second heat-conducting component at the positions of the first filter capacitor on the front and the second filter capacitor on the back of the PCB motherboard, the gaps between the first filter capacitor and the first shielding cover, and between the second filter capacitor and the second shielding cover, can be effectively filled, achieving a tight fit between the first shielding cover and the first filter capacitor, and between the second shielding cover and the second filter capacitor. This structural design not only facilitates heat conduction and dissipation, but more importantly, it significantly enhances the electromagnetic shielding effect, suppresses electromagnetic interference caused by power supply noise, and improves the stability of circuit operation. Therefore, it effectively reduces interference with audio and video signals, significantly improves the recording clarity and image quality of the dashcam, and thus enhances the overall performance of the product.

Description

Technical Field

[0001] This utility model relates to the field of dashcam technology, specifically to a dashcam. Background Technology

[0002] In the design and manufacturing of electronic devices, the control of electromagnetic interference (EMI) and circuit noise are key technical challenges affecting product performance and reliability. This is especially true for portable electronic devices such as dashcams that integrate high-sensitivity audio acquisition and high-definition video processing. Noise generated by internal circuits can easily couple to the signal processing channel, leading to decreased audio and video recording quality, increased background noise, or image interference, severely impacting the user experience.

[0003] As a core component of any device, power management circuitry typically includes a +12V filter capacitor for voltage stabilization. While filtering out power supply ripple, these capacitors, due to their rapid current fluctuations, are prone to generating electromagnetic radiation, creating localized sources of electromagnetic interference. Without effective shielding and isolation, these interference signals can affect nearby audio amplifier circuits, camera modules, or signal transmission lines through spatial radiation or conduction paths, thereby introducing perceptible noise.

[0004] Traditional noise suppression methods often rely on metal shielding to physically isolate critical components. However, in actual structural assembly, there are often tiny gaps between the shielding cover and the shielded component (such as a filter capacitor), making a completely sealed shielding environment impossible. These gaps weaken the shielding effect, becoming channels for electromagnetic leakage and limiting further improvements in noise suppression capabilities. Utility Model Content

[0005] To solve the above problems, this utility model discloses a dashcam that effectively fills the gap between the filter capacitor and the shielding cover, achieving a tight fit.

[0006] To achieve the above objectives, the present invention provides a dashcam, comprising a PCB motherboard, a first shielding cover, a second shielding cover, a first filter capacitor, and a second filter capacitor. The first filter capacitor is disposed on the front side of the PCB motherboard, and the first shielding cover is fitted over the front side of the PCB motherboard. The first filter capacitor is covered between the first shielding cover and the PCB motherboard. A first heat-conducting component is disposed between the first filter capacitor and the first shielding cover. One surface of the first heat-conducting component is tightly attached to the outer surface of the first filter capacitor, and the other surface is tightly attached to the inner wall of the first shielding cover.

[0007] The second filter capacitor is disposed on the back of the PCB motherboard, the second shielding cover 3 is covered on the back of the PCB motherboard 1, and the second filter capacitor 5 is covered between the second shielding cover 3 and the PCB motherboard 1; a second heat-conducting component is disposed between the second filter capacitor and the second shielding cover, one surface of the second heat-conducting component is tightly attached to the outer surface of the second filter capacitor, and the other surface is tightly attached to the inner wall surface of the second shielding cover.

[0008] Furthermore, an L-shaped notch is formed on the first heat-conducting component and the second heat-conducting component respectively, and the L-shaped notch abuts against the edge of the PCB motherboard.

[0009] Furthermore, both the first and second heat-conducting components are sheet-like elastic materials.

[0010] Furthermore, the dashcam also includes a front housing assembly, which includes a faceplate, a display screen, a light guide column, operation buttons, a front heat sink, and a lens. The lens and the display screen are sequentially mounted on the faceplate, and a dustproof cotton is provided between the lens and the display screen. The display screen is electrically connected to the PCB motherboard via a ribbon cable, and the front heat sink is fixed to the inner side wall of the faceplate with screws. The side wall of the faceplate has multiple button holes, and the operation buttons are embedded in the button holes and electrically connected to the electrical contacts on the PCB motherboard. The light guide column is installed inside the faceplate and electrically connected to the PCB motherboard.

[0011] Furthermore, the dashcam also includes a rear housing assembly, which includes a bottom housing, a power cover, and a bracket. The bracket is housed within the bottom housing and is fixedly connected to it. A rear heat sink is disposed between the bracket and the bottom housing, and the rear heat sink is fixed to the bracket with screws. A speaker, a camera module, a supercapacitor, and a GPS module are mounted on the bracket. The speaker, camera module, GPS module, and supercapacitor are all electrically connected to the PCB motherboard, which is fixed to the bracket with screws. The power cover is detachably fitted onto the opening of the bottom housing.

[0012] Furthermore, the surfaces of the first thermal conductive element and / or the second thermal conductive element are provided with a release film or adhesive layer, which is used to fix the positions of the first thermal conductive element and the second thermal conductive element before assembly.

[0013] The beneficial effects of this utility model are:

[0014] This invention provides a dashcam that effectively fills the gaps between the first filter capacitor and the first shielding cover, and between the second filter capacitor and the second shielding cover, in order to achieve a tight fit between them. This structural design not only facilitates heat conduction and dissipation but, more importantly, significantly enhances electromagnetic shielding, suppresses electromagnetic interference caused by power supply noise, and improves circuit stability. Consequently, it effectively reduces interference with audio and video signals, significantly improves the recording clarity and image quality of the dashcam, and thus enhances the overall performance of the product. Furthermore, this dashcam is simple in structure, easy to manufacture, safe and reliable to use, and easy to implement and promote. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a dashcam according to the present invention;

[0016] Figure 2 This is an exploded view of a dashcam according to the present invention;

[0017] Figure 3 This is a cross-sectional view of a vehicle dashcam according to the present invention;

[0018] Figure 4 This is an assembly diagram of the first heat-conducting component and the PCB motherboard in a dashcam according to the present invention;

[0019] Figure 5 This is an assembly diagram of the second heat-conducting component and the PCB motherboard in a dashcam according to the present invention. Detailed Implementation

[0020] 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.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] This utility model proposes a vehicle dashcam.

[0024] In the embodiments of this utility model, such as Figure 1-5 As shown, this dashcam includes a PCB motherboard 1, a first shielding cover 2, a second shielding cover 3, a first filter capacitor 4, and a second filter capacitor 5. The first filter capacitor 4 is disposed on the front side of the PCB motherboard 1, and the first shielding cover 2 covers the front side of the PCB motherboard 1. The first filter capacitor 4 is covered between the first shielding cover 2 and the PCB motherboard 1. A first heat-conducting element 6 is disposed between the first filter capacitor 4 and the first shielding cover 2. One surface of the first heat-conducting element 6 is tightly attached to the outer surface of the first filter capacitor 4, and the other surface is tightly attached to the inner wall of the first shielding cover 2 to fill the gap between the two and shield electromagnetic fields.

[0025] The second filter capacitor 5 is disposed on the back of the PCB motherboard 1, and the second shielding cover 3 is closed on the back of the PCB motherboard 1. The second filter capacitor 5 is covered between the second shielding cover 3 and the PCB motherboard 1. A second heat-conducting component 7 is disposed between the second filter capacitor 5 and the second shielding cover 3. One surface of the second heat-conducting component 7 is tightly attached to the outer surface of the second filter capacitor 5, and the other surface is tightly attached to the inner wall surface of the second shielding cover 3 to fill the gap between the two and shield electromagnetic fields.

[0026] In this embodiment, an L-shaped notch 61 is respectively formed on the first heat-conducting component 6 and the second heat-conducting component 7, and the L-shaped notch 61 abuts against the edge of the PCB motherboard 1.

[0027] In this embodiment, both the first heat-conducting element 6 and the second heat-conducting element 7 are sheet-like elastic materials.

[0028] In this embodiment, the dashcam further includes a front housing assembly 8, which includes a front housing 81, a display screen 82, a light guide column 83, operation buttons 87, a front heat sink 84, and a lens 85. The lens 85 and the display screen 82 are sequentially mounted on the front housing 81, and a dustproof cotton 86 is provided between the lens 85 and the display screen 82. The display screen 82 is electrically connected to the PCB motherboard 1 via a ribbon cable, and the front heat sink 84 is fixed to the inner side wall of the front housing 81 with screws. The side wall of the front housing 81 has multiple button holes 88, and the operation buttons 87 are embedded in the button holes 88 and electrically connected to the electrical contacts on the PCB motherboard 1. The light guide column 83 is installed inside the front housing 81 and electrically connected to the PCB motherboard 1.

[0029] In this embodiment, the dashcam further includes a rear housing assembly 9, which includes a bottom housing 91, a power cover 92, and a bracket 93. The bracket 93 is housed within the bottom housing 91 and is fixedly connected to the bottom housing 91. A rear heat sink 97 is disposed between the bracket 93 and the bottom housing 91, and the rear heat sink 97 is fixed to the bracket 93 with screws. A speaker 94, a camera module 95, a supercapacitor 98, and a GPS module 96 are mounted on the bracket 93. The speaker 94, camera module 95, GPS module 96, and supercapacitor 98 are all electrically connected to the PCB motherboard 1, which is fixed to the bracket 93 with screws. The power cover 92 is detachably fitted onto the opening of the bottom housing 91.

[0030] In this embodiment, the surfaces of the first heat-conducting element 6 and / or the second heat-conducting element 7 are provided with a release film or adhesive layer, which is used to fix the positions of the first heat-conducting element 6 and the second heat-conducting element 7 before assembly.

[0031] The front of the PCB motherboard 1 is covered with a first heat-conducting component 6 attached to the +12V first filter capacitor 4 and covered with a first shielding cover 2. The back is covered with a second heat-conducting component 7 and covered with a second shielding cover 3 at the same position. The purpose is to seal the space between the first filter capacitor 4 and the first shielding cover 2 and the second filter capacitor 5 and the second shielding cover 3 to solve the circuit noise problem.

[0032] Specifically, the first shielding cover 2 is made of metal (such as stainless steel or nickel-plated steel sheet), and is attached to the front of the PCB motherboard 1 by means of clips or screws, and covers the first filter capacitor 4 to form a local electromagnetic shielding cavity.

[0033] A first heat-conducting element 6 is disposed between the first filter capacitor 4 and the first shielding cover 2. One surface of the first heat-conducting element 6 is tightly attached to the outer surface of the first filter capacitor 4, and the other surface is completely attached to the inner wall of the first shielding cover 2. The thickness of the first heat-conducting element 6 is slightly larger than the gap between the top of the filter capacitor and the inner wall of the shielding cover. After the cover is closed, it is in a slightly compressed state, thereby effectively filling the gap between the two, preventing electromagnetic leakage, and realizing the dual functions of electromagnetic shielding and heat conduction.

[0034] Similarly, the second filter capacitor 5 is located on the back of the PCB motherboard 1, and the second shielding cover 3 covers and encloses the filter capacitor; a second heat-conducting component 7 is provided between the second filter capacitor 5 and the second shielding cover 3, which has the same structure and function as the first heat-conducting component 6, and is used for electromagnetic sealing of the back filter capacitor.

[0035] By setting a combination structure of heat-conducting components and shielding covers on both sides of the PCB motherboard 1, this application achieves all-round enveloping shielding of power supply noise sources, significantly reducing the impact of electromagnetic interference on the speaker 94, camera module 95 and GPS module 96, namely the audio amplification circuit and image sensor, and improving the clarity of recording and the stability of video.

[0036] The first thermal conductive component 6 and the second thermal conductive component 7 are sheet-like elastic materials with an L-shaped notch 61. This L-shaped notch 61 abuts against the edge of the PCB motherboard 1 or the positioning pad during assembly, enabling rapid alignment and preventing displacement of the thermal conductive components during mounting. The surfaces of the first thermal conductive component 6 and the second thermal conductive component 7 are provided with an adhesive layer or release film. Before assembly, removing the release film allows the thermal conductive component to be precisely attached to the surface of the filter capacitor, maintaining its stable position during subsequent assembly and preventing detachment or misalignment due to vibration or handling.

[0037] It should be noted that the first heat-conducting element 6 and the second heat-conducting element 7 are preferably thermally conductive silicone pads. These thermally conductive silicone pads possess good elasticity, thermal conductivity (thermal conductivity 1.5–3.0 W / (m·K)), and insulation. Under compression, they can maintain long-term resilience, ensuring a continuous and tight fit between the first shielding cover 2 and the first filter capacitor 4, and between the second shielding cover 3 and the second filter capacitor 5, thereby improving the reliability and durability of the electromagnetic shielding.

[0038] The display screen 82 is mounted on the front cover 81 and electrically connected to the display interface on the PCB motherboard 1 via an FPC cable. Dustproof cotton 86, made of foam or double-sided adhesive, is placed between the display screen 82 and the lens 85 to prevent dust and moisture from entering the display area, thus avoiding black spots or blurring. The lens 85, made of transparent PC or PMMA, is attached to the outer side of the front cover 81, forming the front appearance of the entire device.

[0039] The front heat sink 84 is an aluminum sheet that is fixed to the inner wall of the front shell 81 by multiple screws. It not only plays an auxiliary role in heat dissipation, but more importantly, it presses and fixes the display screen 82, operation buttons 87 and light guide column 83, thereby improving structural stability.

[0040] The side wall of the faceplate 81 has multiple button holes 88, and the operation buttons 87 are embedded in the holes. The bottom of the buttons is provided with conductive rubber or metal springs, which form electrical contact with the operation button 87 pads on the PCB motherboard 1 to realize the user operation input function.

[0041] The light guide post 83 is a transparent plastic part installed inside the front cover 81. One end is close to the LED indicator on the PCB motherboard 1, and the other end corresponds to the marking area on the surface of the cover. It is used to transmit the working status light signal to the outside to realize status prompts such as power, recording, and Wi-Fi.

[0042] The bracket 93 is made of high-strength plastic or metal, housed inside the base shell 91, and fixedly connected to the base shell 91 by clips or screws. The rear heat sink 97 is an aluminum profile heat sink, vertically fixed to the bracket 93 by multiple screws, used to press and fix key electronic modules such as the speaker 94, camera module 95, and GPS module 96 mounted on it.

[0043] The camera module 95 is located at the front end of the bracket 93, and the corresponding housing 81 has a lens hole. The GPS module 96 and speaker 94 are electrically connected to the PCB motherboard 1 via ribbon cables, respectively realizing the functions of receiving positioning signals and playing audio. The PCB motherboard 1 assembly is directly fixed to the bracket 93 with four screws, forming a stable mechanical support structure to prevent vibration from causing the solder joints to break. The power cover 92 is a detachable cover that is fastened to the opening of the bottom housing 91 by clips or screws, used to close the internal components and facilitate future maintenance and power interface connection.

[0044] The structure of this application can be widely used in various electronic devices that require efficient suppression of electromagnetic interference.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A driving recorder comprising a PCB mainboard (1), a first shielding cover (2), a second shielding cover (3), a first filter capacitor (4) and a second filter capacitor (5), characterized in that: The first filter capacitor (4) is disposed on the front side of the PCB motherboard (1), and the first shielding cover (2) is covered on the front side of the PCB motherboard (1). The first filter capacitor (4) is covered between the first shielding cover (2) and the PCB motherboard (1). A first heat-conducting component (6) is disposed between the first filter capacitor (4) and the first shielding cover (2). One surface of the first heat-conducting component (6) is tightly attached to the outer surface of the first filter capacitor (4), and the other surface is tightly attached to the inner wall surface of the first shielding cover (2). The second filter capacitor (5) is disposed on the back of the PCB motherboard (1), and the second shielding cover (3) is covered on the back of the PCB motherboard (1). The second filter capacitor (5) is covered between the second shielding cover (3) and the PCB motherboard (1). A second heat-conducting component (7) is disposed between the second filter capacitor (5) and the second shielding cover (3). One surface of the second heat-conducting component (7) is tightly attached to the outer surface of the second filter capacitor (5), and the other surface is tightly attached to the inner wall surface of the second shielding cover (3).

2. The automobile data recorder according to claim 1, characterized in that: The first heat-conducting component (6) and the second heat-conducting component (7) are respectively provided with an L-shaped notch (61), and the L-shaped notch (61) abuts against the edge of the PCB motherboard (1).

3. The automobile data recorder according to claim 2, characterized in that: Both the first heat-conducting element (6) and the second heat-conducting element (7) are sheet-like elastic materials.

4. The automobile data recorder according to claim 1, characterized in that: The dashcam also includes a front housing assembly (8), which includes a front housing (81), a display screen (82), a light guide column (83), operation buttons (87), a front heat sink (84), and a lens (85). The lens (85) and the display screen (82) are sequentially mounted on the front housing (81), and a dustproof cotton (86) is provided between the lens (85) and the display screen (82). The display screen (82) is electrically connected to the PCB motherboard (1) via a ribbon cable, and the front heat sink (84) is fixed to the inner side wall of the front housing (81) by screws. The side wall of the front housing (81) has multiple button holes, and the operation buttons (87) are embedded in the button holes and electrically connected to the electrical contact points on the PCB motherboard (1). The light guide column (83) is installed inside the front housing (81) and electrically connected to the PCB motherboard (1).

5. The automobile data recorder according to claim 1, characterized in that: The dashcam also includes a rear housing assembly (9), which includes a bottom housing (91), a power cover (92), and a bracket (93). The bracket (93) is housed in the bottom housing (91) and is fixedly connected to the bottom housing (91). A rear heat sink (97) is provided between the bracket (93) and the bottom housing (91). The rear heat sink (97) is fixed to the bracket (93) by screws. A speaker (94), a camera module (95), a supercapacitor (98), and a GPS module (96) are installed on the bracket (93). The speaker (94), camera module (95), GPS module (96), and supercapacitor (98) are all electrically connected to the PCB motherboard (1). The PCB motherboard (1) is fixed to the bracket (93) by screws. The power cover (92) is detachably closed onto the opening of the bottom housing (91).

6. The automobile data recorder according to claim 3, characterized in that: The surfaces of the first heat-conducting element (6) and / or the second heat-conducting element (7) are provided with a release film or adhesive layer, which is used to fix the positions of the first heat-conducting element (6) and the second heat-conducting element (7) before assembly.

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