A mobile terminal

Abstract

This application discloses a mobile terminal, including a terminal casing. A heat dissipation device and a main control board are installed inside the terminal casing, with the heat dissipation device installed on at least one side of the main control board. The heat dissipation device includes a housing, inside which are sequentially connected air inlet duct, ventilation duct, and exhaust duct. A cooling fan is installed within the ventilation duct. The top and bottom of the terminal casing are respectively provided with an exhaust port and an air inlet port. The exhaust port of the exhaust duct is aligned with the exhaust port, and the air inlet port of the air inlet duct is aligned with the air inlet port. When the user holds the device, hot air is exhausted through the top exhaust port, naturally directed away from the user. This directional exhaust design physically avoids hot air directly blowing onto the user and, from an ergonomic perspective, effectively prevents hot air from interfering with the user experience, thus synergistically improving the heat dissipation performance and user comfort of the mobile terminal.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and more particularly to a mobile terminal. Background Technology

[0002] Current smart glasses primarily integrate display functions but lack information processing capabilities. Therefore, they require an external main control device for data processing and image transmission. However, as user applications of smart glasses expand, the scale of data streams processed by the main control device continues to grow. Whether it's real-time transmission of high-definition images, parallel multi-task processing, or complex algorithm execution, the computational load on the main control device increases significantly. This high-intensity computation generates substantial heat. If this heat cannot be dissipated promptly, it can lead to decreased device efficiency, slower response times, and in severe cases, hardware failure or a shortened lifespan. Therefore, current main control devices typically incorporate a cooling system consisting of a fan and a radiator. The fan drives airflow, and the radiator facilitates heat exchange for cooling. However, most current radiator exhaust designs vent from the bottom of the device. Since users often hold the device at an angle, the hot air from the bottom blows directly onto the user, causing discomfort. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a mobile terminal that can solve the problem that the heat dissipation exhaust of the main control device of the smart glasses in the prior art blows directly onto the human body, which can easily cause discomfort to the human body.

[0004] To achieve the above objectives, this application adopts the following technical solution: A mobile terminal is provided, including a terminal housing. A heat dissipation device and a main control board are installed inside the terminal housing, and the heat dissipation device is installed on at least one side of the main control board. The heat dissipation device includes a device housing, and an air inlet duct, a ventilation duct, and an exhaust duct are arranged in sequence inside the device housing. A cooling fan is arranged in the ventilation duct. The top and bottom of the terminal housing are respectively provided with an exhaust hole and an air inlet hole. The exhaust port of the exhaust duct is aligned with the exhaust hole, and the air inlet of the air inlet duct is aligned with the air inlet hole.

[0005] In this embodiment, the top of the terminal casing has an exhaust vent, and the bottom has an air inlet, forming a "bottom-in, top-out" airflow channel. When the user holds the device, hot air is exhausted through the top exhaust vent, and the airflow direction is naturally towards the side away from the body (for example, when the terminal is held vertically, the top exhaust vent blows air diagonally upwards or horizontally away from the face / hand). This directional exhaust design avoids hot air directly blowing onto the body from a physical path perspective, and effectively avoids the problem of hot air interfering with the user experience from an ergonomic perspective, thus synergistically improving the heat dissipation performance and user comfort of the mobile terminal.

[0006] Optionally, the vent is centrally located at the top of the terminal housing, and the vent extends at an angle toward the vent, so that the vent is aligned with the vent. A control surface is provided on one side of the mobile terminal, and the vent extends away from the control surface.

[0007] In this embodiment, the top-centered air outlet makes it easier to direct the airflow "away from the human body," ensuring that the airflow is kept away from the body at various grip angles, preventing hot air from concentrating on the user's contact area and improving user comfort. Furthermore, the exhaust duct is extended at an angle so that it aligns with the centrally located exhaust hole on the terminal casing, directly guiding the exhaust and preventing internal airflow. Specifically, after the cooling fan drives the hot airflow into the exhaust duct, the angled structure of the exhaust duct "biases and guides" the airflow. The hot airflow changes its path under the constraint of the angled duct, converging towards the centrally located exhaust hole at the top of the terminal casing. This guidance prevents the hot airflow from spreading randomly inside the terminal, ensuring that most of the heat is directly discharged through the exhaust hole. The exhaust vent of the exhaust duct precisely aligns with the centrally located exhaust hole, and combined with the sealing design of the terminal casing and device housing (such as edge fitting and gap filling), a closed channel of airflow and exhaust hole is formed. When hot air flows within a closed channel, it is not dispersed by cluttered internal spaces (such as obstructions from batteries or components), reducing the phenomenon of "airflow" (i.e., hot air circulates and accumulates internally instead of being expelled from the casing). In mobile terminals, the control surface is typically the screen and / or keyboard side, which faces the user during operation. Importantly, in addition to its inclined extension, the exhaust duct extends away from the control surface, ensuring that the airflow is directed away from the user, further reducing the possibility of hot air blowing directly onto the user and optimizing the user experience.

[0008] Optionally, one end of the exhaust duct is provided with an exhaust port, the exhaust duct is in the shape of a flared horn, and the flaring direction is from the ventilation duct to the exhaust port.

[0009] In this embodiment, the flared, funnel-shaped exhaust duct diffuses the hot airflow during discharge, avoiding the problem of concentrated hot air impacting a localized area, as seen in traditional direct-exit ducts. The increased surface area of ​​the diffused hot air allows for faster mixing and cooling with the ambient air, reducing heat buildup on the exterior of the terminal casing or in areas of user contact and alleviating discomfort caused by localized high temperatures. For scenarios involving close contact with the human body, such as the main control device of smart glasses (typically handheld), the diffused exhaust airflow offers a more uniform temperature distribution and a gentler wind speed, avoiding the discomfort of hot air directly blowing on the hands and face, a common issue with traditional concentrated airflow. For mobile devices such as smartphones and tablets, it also reduces the probability of fingers coming into contact with hot air during handling.

[0010] Optionally, the device housing includes a housing base and a housing cover, the housing cover being fitted onto the housing base to form the air inlet duct, the ventilation duct, and the exhaust duct.

[0011] In this embodiment, the separate structures of the shell base and shell cover can be processed separately using mature processes such as injection molding. The complex air duct contours can be precisely formed using molds, avoiding the difficulties in demolding or insufficient processing precision caused by the complex internal structure of the integrated shell. At the same time, the modular design facilitates later maintenance (such as the shell cover can be disassembled and replaced separately in case of fan failure), reducing maintenance costs. Different mobile terminals (such as smart glasses main control devices, mobile phones, and tablets) have different internal spaces and heat dissipation requirements. The separate shell can be quickly adapted by adjusting the local structure of the shell base or shell cover (such as air duct length and flare angle), without the need to redesign the overall mold, thus shortening the product iteration cycle.

[0012] Optionally, the shell base includes a base body and an exhaust base plate. The base body is arranged parallel to the main control board, and the base body and the shell cover form the air inlet duct and the ventilation duct. The exhaust base plate is inclined relative to the base body, and the exhaust base plate and the shell cover form the exhaust duct, so that the exhaust duct extends inclinedly.

[0013] In this embodiment, when the heat dissipation device cannot be centrally installed due to offset, the tilt angle of the exhaust base plate can be adjusted as needed. This allows the exhaust duct to bypass obstacles such as batteries and low-power components, precisely aligning with the centrally located exhaust vent on the top of the casing. This design resolves the spatial conflict between offset installation and central exhaust without sacrificing the heat absorption efficiency of the heat dissipation device (which remains close to the power chip side). It is particularly suitable for smart glasses main control devices or mobile phones with compact internal spaces. Furthermore, the structural separation of the base body and the exhaust base plate makes the manufacturing of the tilt angle easier.

[0014] Optionally, a thermally conductive pad is provided between the housing base and the main control board, with both sides of the thermally conductive pad contacting the housing base and the main control board respectively.

[0015] In this embodiment, by setting a thermally conductive pad between the housing base and the main control board, the interface thermal resistance bottleneck is overcome in a simple and low-cost way, which accelerates the conduction of heat from the heat-generating core to the heat dissipation device, and further ensures the performance stability and service life of the equipment.

[0016] Optionally, the main control board includes a power chip, and the thermal pad is correspondingly disposed on the power chip.

[0017] In this embodiment, a thermal pad is set for the power chip, the size of which matches the surface area of ​​the power chip (usually slightly larger than the chip area) to ensure targeted heat collection. Targeted setting can reduce the amount of material used (compared to full coverage), reduce the weight and volume of the heat dissipation system, better adapt to the space requirements of miniaturized terminals such as smart glasses main control devices, and at the same time reduce assembly complexity and production costs.

[0018] Optionally, the cooling fan is mounted on the top cover of the housing, and the housing base is provided with a hollow hole corresponding to the top cover of the housing. The cooling fan is aligned with the main control board through the hollow hole, so that the cooling fan can draw air from the surface of the main control board.

[0019] In this embodiment, the perforations break the physical obstruction of airflow by the casing base, expanding the suction range of the cooling fan from "limited to the inside of the air duct" to "the open space on the surface of the main control board." This spatial expansion effect reduces the compression and turbulence of airflow before it enters the fan, lowering the fan's suction resistance (similar to "widening the intake channel"), which is more conducive to forming a higher-speed heat exchange airflow and accelerating the removal of heat from the surface of the main control board. Simultaneously, when the perforations are aligned with non-core heat-generating areas on the surface of the main control board (such as areas where low-power components are concentrated), the high-speed airflow can directly absorb the heat emitted by these areas without the need for additional thermal pads or metal heat-conducting sheets. For example, although discrete components such as resistors and capacitors on the main control board generate relatively little heat, long-term accumulation can still lead to localized temperature rise. The airflow guided by the perforations can directly remove this heat, reducing reliance on thermal conductive structures, thereby simplifying the overall design of the cooling system and reducing material and assembly costs.

[0020] Optionally, the power chip is positioned on the main control board away from the cutout holes, so that thermal pads that transfer heat to the device housing can be placed on the power chip.

[0021] In this embodiment, heat from low-heat areas is directly drawn away through airflow via perforations (short path, low cost), while high-heat from the power chip is dissipated via a path of thermal pad → housing → ventilation duct (high efficiency, high reliability). This design of "allocating heat dissipation resources according to heat generation" maximizes the efficiency of the heat dissipation system, concentrating limited thermal conductive materials on high-heat sources, while low-heat areas are covered by low-cost airflow for heat dissipation.

[0022] Optionally, the cooling fan includes a volute and a fan installed inside the volute. The volute is installed on the top cover of the housing. An air intake is provided on the side of the volute facing the main control board, and an exhaust port is provided on the side of the volute facing the exhaust duct.

[0023] In this embodiment, the flow channel constraint of the volute ensures that the airflow strictly follows the path of "intake port → volute → exhaust port → ventilation duct," avoiding the "airflow backflow" or "diffusion loss" problems common in fans without a volute. This ensures that more heat is effectively expelled from the terminal casing, reducing internal heat accumulation. Simultaneously, the "volute + fan" combination design further enhances the airflow driving capability, directional control capability, and noise reduction performance of the cooling system, making the mobile terminal's cooling solution more comprehensive in terms of efficiency, stability, and user experience.

[0024] Optionally, the heat dissipation device further includes a radiator disposed in the ventilation duct, the radiator including a radiator shell and a plurality of heat dissipation fins spaced apart within the radiator shell, the radiator shell contacting the inner surface of the device housing, and the extending direction of the heat dissipation fins being the same as the extending direction of the ventilation duct.

[0025] In this embodiment, the heat collected by the device housing is conducted to each heat dissipation fin through the heat sink shell, so that the heat is diffused from the "local area of ​​the device housing" to the "full surface of multiple fins". The heat exchange area is effectively expanded, and the expanded heat exchange area enables the heat dissipation system to handle higher power heat (such as the peak power consumption when the main control board is running large applications or multi-tasking).

[0026] Optionally, the cooling fan is disposed within the ventilation duct near the air intake duct, the radiator is disposed within the ventilation duct near the air exhaust duct, and the exhaust port of the cooling fan faces the radiator.

[0027] In this embodiment, the cooling fan is installed upstream of the ventilation duct (near the intake duct side), with its exhaust port facing the downstream radiator (near the exhaust duct side). A short transition space (or direct connection) is provided between the two to ensure that all the airflow exhausted by the fan can enter the radiator. The cold air in the intake duct first flows through the fan, and then is directed towards the radiator by the fan's driving force, and finally discharged through the exhaust duct. The exhaust direction of the cooling fan and the extension direction of the radiator fins are completely consistent with the direction of the ventilation duct (e.g., both are horizontal), forming a straight airflow path of "intake → fan → radiator → exhaust", avoiding airflow loss or turbulence caused by direction changes. In addition, the cooling fan's proximity to the intake duct means that the corresponding perforated hole on the housing base is also close to the intake duct. The cold air entering from the intake hole does not need to diffuse a long distance to quickly reach the main control board area below the perforated hole. This short-path design allows for immediate replenishment of cool air to the main control board surface after hot air is drawn away by the fan. This rapid replenishment of airflow creates localized airflow disturbances below the perforations, driving airflow across the main control board surface and indirectly enhancing convective cooling. Furthermore, the timely replenishment of airflow when the cooling fan is close to the intake side prevents the formation of "negative pressure cavities" (i.e., a sudden drop in air pressure caused by the fan's suction force exceeding the intake airflow) within the air duct. This stable air pressure environment ensures the fan operates at its rated efficiency, reducing airflow attenuation due to air pressure fluctuations and guaranteeing a continuous and stable airflow supply to the heatsink. Attached Figure Description

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a structural schematic diagram of the top oblique view of the mobile terminal described in the embodiments of this application; Figure 2 This is a structural schematic diagram of the bottom oblique view of the mobile terminal described in the embodiments of this application; Figure 3 This is an exploded view of the mobile terminal described in an embodiment of this application; Figure 4 This is a schematic diagram of the internal structure of the mobile terminal described in the embodiments of this application; Figure 5 for Figure 4 An exploded view of the structure shown. Figure 6 This is a schematic diagram of the heat dissipation device described in an embodiment of this application; Figure 7 This is a schematic diagram of the heat dissipation device described in an embodiment of this application from another perspective; Figure 8 This is a cross-sectional view of the heat dissipation device described in the embodiments of this application; Figure 9This is a longitudinal sectional view of the heat dissipation device described in the embodiments of this application; Figure 10 This is one of the exploded schematic diagrams of the heat dissipation device described in the embodiments of this application; Figure 11 This is a second exploded view of the heat dissipation device described in the embodiments of this application; Figure 12 This is a schematic diagram of the structure of the shell cover described in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of the shell base described in the embodiment of this application; Figure 14 This is an exploded view of the shell base described in an embodiment of this application; Figure 15 This is a schematic diagram of the cooling fan described in an embodiment of this application; Figure 16 This is a schematic diagram of the structure of the heat sink described in the embodiment of this application.

[0030] In the picture: 1. Terminal casing; 11. Exhaust vent; 12. Air inlet; 2. Main control board; 21. Power chip; 3. Heat dissipation device; 31. Device casing; 311. Casing base; 3111. Base body; 3112. Exhaust base plate; 3113. Sealing strip; 31111. Hollow hole; 312. Casing top cover; 313. Air inlet duct; 3131. Air inlet; 314. Ventilation duct; 315. Exhaust duct; 3151. Exhaust outlet; 32. Cooling fan; 321. Volute; 3211. Air intake; 3212. Exhaust outlet; 322. Fan; 33. Heat sink; 331. Heat sink casing; 332. Heat dissipation fins; 34. Thermal pad; 35. Thermal pad. Detailed Implementation

[0031] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The core functionality of existing smart glasses primarily focuses on the display module, providing users with visual information. However, they generally lack independent information processing capabilities, unable to directly perform crucial operations such as data computation, signal analysis, and content generation. This functional architecture necessitates that smart glasses rely on an external main control device to form a complete working system during actual use. The main control device undertakes the primary information and data processing tasks, including image rendering, data decoding, and interactive command processing. The processed image information is then transmitted wirelessly or via wired connection to the smart glasses' display unit for final content display.

[0035] However, as users expand the application scenarios of smart glasses, the scale of data streams that the main control device needs to process continues to increase. Whether it's real-time transmission of high-definition images, parallel processing of multiple tasks, or the execution of complex algorithms, the computational load on the main control device increases significantly. High-intensity computation generates a large amount of heat. If this heat cannot be dissipated in time, it will not only lead to decreased device efficiency and slower response speed, but may also cause hardware failure or shorten the device's lifespan in severe cases. Therefore, existing main control devices generally have built-in cooling devices consisting of cooling fans and heat sinks. The fan drives airflow, and the heat exchange function of the heat sink achieves cooling. However, the current mainstream heat sink vent design mostly uses a simple bottom-outlet design. In most cases, users hold the device at an angle, causing the hot air from the bottom to blow directly onto the body, leading to discomfort.

[0036] To overcome the above technical problems, this application provides a mobile terminal that optimizes the product's heat dissipation and ventilation to prevent hot air from blowing directly onto the user's body when holding and using the device, thus improving the user experience. The mobile terminal in this embodiment can be the main control device for smart glasses, or it can be a mobile phone, tablet, or other mobile control terminal.

[0037] To achieve the above objectives, such as Figures 1-9 As shown, the mobile terminal in this embodiment includes a terminal housing 1. A heat dissipation device 3 and a main control board 2 are installed inside the terminal housing 1. The heat dissipation device 3 is installed on at least one side of the main control board 2. The heat dissipation device 3 includes a device housing 31. An air inlet duct 313, a ventilation duct 314, and an exhaust duct 315 are arranged in sequence inside the device housing 31. A cooling fan 322 is arranged inside the ventilation duct 314. The top and bottom of the terminal housing 1 are respectively provided with an exhaust hole 11 and an air inlet hole 12. The exhaust port 3151 of the exhaust duct 315 is aligned with the exhaust hole 11, and the air inlet 3131 of the air inlet duct 313 is aligned with the air inlet hole 12.

[0038] In this embodiment, a heat dissipation device 3 is installed on one or both sides of the main control board 2 to ensure that the heat generated by the main control board 2 during operation can be directly conducted to the heat dissipation device 3, reducing the meaningless diffusion of heat inside the terminal.

[0039] The heat dissipation device 3 forms an independent airflow channel through the device housing 31. Inside, an air inlet duct 313, a ventilation duct 314, and an exhaust duct 315 are arranged in sequence, and the three are connected end to end to form a complete heat dissipation path. Among them, the ventilation duct 314 is the core of airflow power, and the built-in cooling fan 322 is responsible for driving the airflow; the air inlet duct 313 is used to introduce cold air (or external ambient air) from inside the terminal housing 1, and the exhaust duct 315 undertakes the key function of heat dissipation. During operation, the heat generated by the main control board 2 is transferred to the housing 31 of the heat dissipation device 3 through direct or indirect physical contact, causing the temperature of the housing 31 to rise and forming a local high-temperature area. The cold air (or ambient air) inside the terminal housing 1 enters the air intake duct 313 under the suction of the cooling fan 322, completing the initial preparation for heat exchange. After the cold air enters the ventilation duct 314 through the air intake duct 313, it comes into contact with the inner wall of the ventilation duct 314, absorbs the heat collected by the heat dissipation device 3, and is converted into a hot airflow carrying heat. The hot airflow enters the exhaust duct 315 from the ventilation duct 314 and is then discharged outward.

[0040] Reference Figure 1 and Figure 2The top and bottom of a mobile terminal are defined as follows: when the mobile terminal is in its normal upright position, the part closer to the ground is the bottom, and the part farther from the ground is the top. When a user holds the mobile terminal, it is generally in a flat or tilted position, with the bottom facing the user and the top away from the user.

[0041] In this embodiment, the terminal casing 1 has an exhaust vent 11 at the top and an air inlet vent 12 at the bottom, forming a "bottom-in, top-out" airflow channel. When the user holds the device, hot air is exhausted through the top exhaust vent 11, and the airflow direction is naturally towards the side away from the human body (for example, when the terminal is held vertically, the top exhaust vent 11 exhausts air diagonally upwards or horizontally away from the face / hand). This directional exhaust design avoids hot air directly blowing onto the human body from a physical path perspective, and effectively avoids the problem of hot air interfering with the user experience from an ergonomic perspective, thus synergistically improving the heat dissipation performance and user comfort of the mobile terminal.

[0042] In one embodiment, such as Figure 8 and Figure 9 As shown, the air inlet duct 313 and the air outlet duct 315 are located on opposite sides of the ventilation duct 314.

[0043] In this embodiment, the ventilation duct 314 serves as the core airflow channel of the heat dissipation device 3. It connects to the intake duct 313 and exhaust duct 315 on either side, forming a "straight-line" or "symmetrical" spatial layout (e.g., the ventilation duct 314 is arranged horizontally, with the intake duct 313 on the left and the exhaust duct 315 on the right; or the ventilation duct 314 is arranged vertically, with the intake duct 313 at the bottom and the exhaust duct 315 at the top). This layout ensures that the intake and exhaust directions are opposite, and the airflow flows along a straight or symmetrical path inside the heat dissipation device 3, reducing duct bends. When cold air enters the ventilation duct 314, it directly contacts the cooling fan 322 and the inner wall of the ventilation duct 314, quickly absorbing the heat transferred from the main control board 2 to the heat dissipation device 3 and converting it into hot air. Because the intake and exhaust directions are opposite, the hot airflow can directly enter the exhaust duct 315 without detours, reducing the residence time of the airflow in the duct and minimizing secondary heat accumulation inside the heat dissipation device 3. In addition, this direct-flow method can effectively avoid problems such as local airflow turbulence and heat dead zones inside the heat dissipation device 3, making heat exchange in each area more sufficient and avoiding the impact of local high temperature on some components.

[0044] In one embodiment, combined with Figure 3 and Figure 9 The exhaust vent 11 is centrally located at the top of the terminal housing 1. The exhaust duct 315 extends at an angle toward the exhaust vent 11, so that the exhaust port 3151 is aligned with the exhaust vent 11. A control surface is provided on one side of the mobile terminal, and the exhaust duct 315 extends away from the control surface.

[0045] In mobile terminals, the heat dissipation device 3 is generally not centered inside the terminal casing 1. For example, the main control board 2 is generally centered, with the power chip 21 (the main heat-generating device during operation) concentrated on one side, and the heat dissipation device 3 is placed on this side; a small number of electronic components are placed on the other side, which generate less heat, and the battery is generally stacked on this side, in which case the heat dissipation device 3 is offset to one side.

[0046] In this embodiment, the top-centered air outlet makes it easier to direct the airflow "away from the human body," ensuring that the airflow is kept away from the body at various grip angles, preventing hot air from concentrating on the user's contact area and improving user comfort. Furthermore, the exhaust duct is extended at an angle so that it aligns with the centrally located exhaust hole 11 on the terminal housing 1, directly guiding the exhaust and preventing internal airflow. Specifically, after the cooling fan 322 drives the hot airflow into the exhaust duct 315, the inclined structure of the exhaust duct 315 creates a "biased guidance" effect on the airflow. The hot airflow changes its path under the constraint of the inclined duct, converging towards the centrally located exhaust hole 11 at the top of the terminal housing 1. This guidance prevents the hot airflow from spreading randomly inside the terminal, ensuring that most of the heat is directly discharged through the exhaust hole 11. The exhaust port 3151 of the exhaust duct 315 precisely aligns with the centrally located exhaust hole 11, and together with the sealing design of the terminal housing 1 and the device housing 31 (such as edge fitting and gap filling), a closed channel of airflow duct and exhaust hole 11 is formed. When hot air flows within the enclosed channel, it is not dispersed by cluttered internal spaces (such as obstructions from batteries or components), reducing the phenomenon of "airflow" (i.e., hot air does not escape from the casing but instead circulates and accumulates internally). In mobile terminals, the control surface is typically the screen and / or keyboard side, which faces the user during operation. Importantly, in addition to its inclined extension, the exhaust duct 315 extends away from the control surface, ensuring that the airflow is directed away from the user, further reducing the possibility of hot air blowing directly onto the user and optimizing the user experience.

[0047] In addition, most of the existing mainstream heat sink vent designs adopt a single-direction straight-out form. This structure makes the hot air exhibit obvious directional concentration characteristics during the exhaust process. This not only makes it easy for heat to accumulate in local areas of the device, but may also affect the user experience due to the excessively concentrated airflow at the vent, such as causing an uncomfortable hot air sensation when it is close to the user's hands or face.

[0048] To overcome the above technical problems, in one embodiment, the exhaust duct 315 is provided with an exhaust port 3151 at one end. The exhaust duct 315 is in the shape of a flared horn, and the flaring direction is from the ventilation duct 314 to the exhaust port 3151.

[0049] In the specific design of the exhaust duct 315, one end is connected to the ventilation duct 314, and the other end is equipped with an exhaust port 3151. The overall shape is a flared funnel, with the flaring direction pointing from the ventilation duct 314 to the exhaust port 3151. Specifically, the flared funnel shape of the exhaust duct 315 means that the cross-sectional area of ​​the airflow gradually increases with the direction of propagation. According to the principles of fluid dynamics, the same flow rate of air will naturally diffuse in all directions in a channel with an increased cross-sectional area, resulting in a decrease in flow velocity but an expansion of coverage area. Finally, it is discharged to the outside of the terminal housing 1 in a diffused manner through the exhaust port 3151, rather than the directional and concentrated discharge of a traditional straight-outlet duct.

[0050] In practical implementation, the flared design of the exhaust duct 315 can be a single flared horn shape in the horizontal direction, a single flared horn shape in the vertical direction, or a flared horn shape in both the horizontal and vertical directions, depending on the spatial layout within the terminal housing. For example, refer to... Figure 8 The design shown is a single flared trumpet shape in the horizontal direction.

[0051] In this embodiment, the flared, trumpet-shaped exhaust duct 315 diffuses the hot airflow during discharge, avoiding the problem of "concentrated hot air impacting a localized area" common in traditional direct-exit ducts. The increased contact area between the diffused hot airflow and the ambient air allows for faster mixing and cooling, reducing heat buildup on the exterior of the terminal casing 1 or in areas in contact with the user, thus alleviating discomfort caused by localized high temperatures. For scenarios involving close contact with the human body, such as the main control device of smart glasses (generally handheld), the diffused exhaust airflow has a more uniform temperature distribution and a gentler wind speed, avoiding the discomfort of hot air directly blowing on the hands and face, a common problem with traditional concentrated airflow. For mobile terminals such as smartphones and tablets, it also reduces the probability of fingers coming into contact with hot air during handling.

[0052] In one embodiment, combined with Figures 6-11 The device housing 31 includes a housing base 311 and a housing cover 312. The housing cover 312 covers the housing base 311 to form the air inlet duct 313, the ventilation duct 314 and the exhaust duct 315.

[0053] The device housing 31 consists of two parts: a housing base 311 and a housing cover 312. The two parts are connected by a fitting method (such as snap-fit ​​connection, screw fixing, edge sealing, etc.) to form a complete closed housing. This split design allows the internal structure of the air duct (air inlet duct 313, ventilation duct 314, and exhaust duct 315) to be pre-processed on the inside of the housing base 311 or the housing cover 312, and then assembled by fitting the covers together to form a continuous channel. For example, the contours of the air inlet duct 313, ventilation duct 314, and exhaust duct 315 are defined by the grooves, protrusions, or guide ribs on the inside of the housing base 311 and the housing cover 312. For example, the bottom contour of the air duct is reserved on the inside of the housing base 311, and the top contour of the air duct is correspondingly set on the inside of the housing cover 312. After fitting the covers together, the concave and convex structures of the two parts are combined to form a complete airflow channel, ensuring the airtightness and path integrity of the air duct.

[0054] In this embodiment, the separate structures of the base 311 and the top cover 312 can be processed separately using mature processes such as injection molding. The complex air duct contours can be precisely formed using molds, avoiding the difficulties in demolding or insufficient processing precision caused by the complex internal structure of the integrated shell. At the same time, the modular design facilitates later maintenance (e.g., the top cover 312 can be disassembled and replaced separately when the fan 322 fails), reducing maintenance costs. Different mobile terminals (such as smart glasses main control devices, mobile phones, and tablets) have different internal spaces and heat dissipation requirements. The separate shell can be quickly adapted by adjusting the local structure of the base 311 or the top cover 312 (such as the length of the air duct and the flare angle), without the need to redesign the overall mold, thus shortening the product iteration cycle.

[0055] In one embodiment, reference is made to Figure 13 and Figure 14 The shell base 311 includes a base body 3111 and an exhaust base plate 3112. The base body 3111 is arranged parallel to the main control board 2. The base body 3111 and the shell cover 312 form the air inlet duct 313 and the ventilation duct 314. The exhaust base plate 3112 is inclined relative to the base body 3111. The exhaust base plate 3112 and the shell cover 312 form the exhaust duct 315, so that the exhaust duct 315 extends inclinedly.

[0056] Specifically, the base body 3111 is flat and parallel to the main control board 2, serving as the basic support structure for the heat dissipation device 3. Together with the corresponding area of ​​the shell cover 312, it forms the air intake duct 313 and the ventilation duct 314, ensuring that the direction of these two ducts remains parallel to the main control board 2, facilitating the absorption of its surface heat. The exhaust base plate 3112 is connected to the base body 3111 at an angle (i.e., the exhaust base plate 3112 forms a certain angle with the base body 3111), and together with the corresponding inclined area of ​​the shell cover 312, it forms the exhaust duct 315. Due to the inclined posture of the exhaust base plate 3112, the exhaust duct 315 naturally presents a shape that "extends obliquely from the ventilation duct 314 to the exhaust port 3151," directly achieving directional turning of the air duct.

[0057] In this embodiment, when the heat dissipation device 3 cannot be installed in the center due to offset, the tilt angle of the exhaust base plate 3112 can be adjusted as needed, allowing the exhaust duct 315 to bypass obstacles such as batteries and low-power components, and precisely align with the centrally located exhaust hole 11 on the top of the casing. This design does not sacrifice the heat absorption efficiency of the heat dissipation device 3 (which remains close to the power chip 21), thus resolving the spatial contradiction between offset installation and central exhaust. It is particularly suitable for smart glasses main control devices or mobile phones with compact internal spaces. At the same time, the structural separation of the base body 3111 and the exhaust base plate 3112 makes the processing of the tilt angle easier.

[0058] In one embodiment, the base body 3111 and the exhaust base plate 3112 are respectively assembled and connected to the shell cover 312, and a sealing strip 3113 is pasted at the splicing gap between the base body 3111 and the exhaust base plate 3112.

[0059] Specifically, the base body 3111 and the exhaust base plate 3112 are fixedly assembled to the shell cover 312 by means of clips, screws, etc., to ensure the relative position stability of the three. When the cooling fan 322 drives the hot airflow in the air duct, the air pressure inside the air duct is slightly higher than the air pressure inside the terminal shell 1. If there is a gap at the joint between the base body 3111 and the exhaust base plate 3112, some hot airflow will leak from the gap into other spaces inside the terminal. After the sealing strip 3113 fills the gap, it forms an air resistance barrier to prevent the hot airflow from leaking and forces all the airflow to flow along the exhaust air duct 315 to the exhaust port 3151.

[0060] In one embodiment, reference is made to Figure 5 A thermally conductive pad 35 is provided between the housing base 311 and the main control board 2, and the two sides of the thermally conductive pad 35 respectively contact the housing base 311 and the main control board 2.

[0061] The thermal pad 35 is made of a flexible material with high thermal conductivity (such as silicone-based thermal pads or graphite thermal pads). Its thickness is designed according to the gap between the housing base 311 and the main control board 2. Its two sides are tightly attached to the bottom surface of the housing base 311 and the surface of the heat-generating area of ​​the main control board 2, respectively. The thermal pad 35 has a certain degree of elasticity and can undergo slight deformation under assembly pressure. It can not only adapt to the tolerance error between the housing base 311 and the main control board 2, but also tightly wrap the small protrusions (such as chip pins) on the surface of the main control board 2, avoiding thermal resistance due to poor contact and ensuring that there are no dead corners in heat transfer.

[0062] In this embodiment, by setting a thermally conductive pad 35 between the housing base 311 and the main control board 2, the interface thermal resistance bottleneck is overcome in a simple and low-cost way, which accelerates the conduction of heat from the heat-generating core to the heat dissipation device 3, and further ensures the performance stability and service life of the equipment.

[0063] In one embodiment, the main control board 2 includes a power chip 21, and the thermal pad 35 is correspondingly disposed on the power chip 21.

[0064] The power chip 21 (such as the CPU, GPU, RF chip and other main heat sources) is the "heat core" of the main control board 2, and its temperature directly affects the performance of the device.

[0065] In this embodiment, a thermal pad 35 is provided for the power chip 21, the size of which matches the surface area of ​​the power chip 21 (usually slightly larger than the chip area) to ensure targeted heat collection; targeted setting can reduce the amount of material used (compared to full coverage), reduce the weight and volume of the heat dissipation system, better adapt to the space requirements of miniaturized terminals such as smart glasses main control devices, and at the same time reduce assembly complexity and production costs.

[0066] In one embodiment, reference is made to Figure 7 and Figure 11 The cooling fan 322 is installed on the shell cover 312. The shell base 311 is provided with a hollow hole 31111 corresponding to the shell cover 312. The cooling fan 322 is aligned with the main control board 2 through the hollow hole 31111, so that the cooling fan 322 can draw air from the surface of the main control board 2.

[0067] The cooling fan 322 is fixedly installed inside the housing cover 312, with its exhaust direction aligned with the airflow path of the ventilation duct 314 (i.e., towards the exhaust duct 315). The intake side directly faces the surface of the main control board 2 through the perforated hole 31111 in the housing base 311. This arrangement ensures that the fan 322's suction direction is perpendicular to the main control board 2, forming an airflow path of main control board 2 → perforated hole 31111 → fan 322 → ventilation duct 314. When the cooling fan 322 starts, it generates a directional negative pressure through the perforated hole 31111 in the housing base 311, directly drawing hot air from the surface of the main control board 2 into the ventilation duct 314. This direct suction airflow path directly removes hot air from the surface of the main control board 2, reducing the accumulation of hot air within the terminal.

[0068] In this embodiment, the perforation 31111 breaks the physical obstruction of airflow by the shell base 311, expanding the suction range of the cooling fan 322 from "limited to the inside of the air duct" to "the open space on the surface of the main control board 2". This spatial expansion effect reduces the compression and turbulence of airflow before entering the fan 322, lowers the suction resistance of the fan 322 (similar to "widening the air intake channel"), and is more conducive to forming a higher speed heat exchange airflow, accelerating the efficiency of heat removal from the surface of the main control board 2. Based on this method, the suction space of the cooling fan 32 is widened, which is more conducive to the thinning design of the device shell 31 while meeting the suction requirements, and thus facilitates the thinning of the entire mobile terminal. At the same time, when the perforation 31111 is aligned with the non-core heat-generating areas (such as the low-power component gathering area) on the surface of the main control board 2, the high-speed airflow can directly suck the heat emitted by these areas without the need for additional thermal pads 35 or metal thermal sheets. For example, although discrete components such as resistors and capacitors on the main control board 2 generate relatively little heat, long-term accumulation can still lead to localized temperature rise. The airflow guided by the perforated holes 31111 can directly carry away their heat, reducing reliance on heat-conducting structures, thereby simplifying the overall design of the heat dissipation system and reducing material and assembly costs.

[0069] In one embodiment, the power chip 21 is disposed on the main control board 2, avoiding the cutout hole 31111, so that the power chip 21 can be provided with a thermally conductive pad 35 to transfer heat to the device housing 31.

[0070] The mounting position of the power chip 21 on the main control board 2 is completely offset from the cutout hole 31111 of the housing base 311 (without overlapping areas). The two form a spatial relationship of "each occupying its own place" in the vertical direction. The cutout hole 31111 corresponds to the low heat generation area of ​​the main control board 2 (such as the discrete component area), and the power chip 21 is distributed around or on the other side of the cutout hole 31111, ensuring that there is complete space on its surface to attach the thermal pad 35. Since the top surface of the power chip 21 can be completely covered by the thermal pad 35 (without contact interruption caused by the opening), one side of the thermal pad 35 is tightly attached to the power chip 21, and the other side is connected to the solid area (non-cutout part) of the housing base 311, forming a continuous and uninterrupted conduction path, avoiding the heat conduction "blind spot" caused by the cutout hole 31111.

[0071] In this embodiment, heat from low-heat areas is directly drawn away through the airflow in the perforated holes 31111 (short path, low cost), while high heat from the power chip 21 is dissipated through the path of thermal pad 35 → housing base 311 → ventilation duct 314 (high efficiency, high reliability). This design of "allocating heat dissipation resources according to heat generation" maximizes the efficiency of the heat dissipation system, concentrating limited thermal conductive materials on high heat sources, while low-heat areas are covered by low-cost airflow for heat dissipation.

[0072] In one embodiment, combined with Figure 7 and Figure 15 The cooling fan 322 includes a volute 321 and a fan 322 installed inside the volute 321. The volute 321 is installed on the shell cover 312. An air intake 3211 is provided on the side of the volute 321 facing the main control board 2, and an exhaust port 3212 is provided on the side of the volute 321 facing the exhaust duct 315.

[0073] The cooling fan 322 consists of a volute 321 and a fan blade assembly (including a motor). The fan blade assembly is installed inside the volute 321, which is fixed to the inside of the upper cover 312 by clips or screws. Its overall outline is adapted to the direction of the ventilation duct 314. An air intake 3211 is opened on the side of the volute 321 facing the main control board 2. This opening is precisely aligned with the hollow hole 31111 of the base 311, ensuring that airflow can directly enter the volute 321 from the surface of the main control board 2. An exhaust port 3212 is opened on the side facing the exhaust duct 315. The shape of the exhaust port 3212 matches the cross-section of the ventilation duct 314, allowing the compressed airflow to be directed into the exhaust duct 315.

[0074] In this embodiment, the flow channel constraint of the volute 321 ensures that the airflow strictly follows the path of "intake port 3211 → volute 321 → exhaust port 3212 → ventilation duct 314," avoiding the "airflow backflow" or "diffusion loss" problems commonly seen without a volute 321 and fan 322. This ensures that more heat is effectively dissipated from the terminal casing 1, reducing internal heat accumulation. Simultaneously, the combined design of "volute 321 + fan 322" further enhances the airflow driving capability, directional control capability, and noise reduction performance of the heat dissipation system, making the mobile terminal's heat dissipation solution more comprehensive in terms of efficiency, stability, and user experience.

[0075] In one embodiment, combined with Figure 8 and Figure 16 The heat dissipation device 3 further includes a radiator 33 disposed in the ventilation duct 314. The radiator 33 includes a radiator shell 331 and a plurality of heat dissipation fins 332 spaced apart within the radiator shell 331. The radiator shell 331 contacts the inner surface of the device housing 31. The extending direction of the heat dissipation fins 332 is the same as the extending direction of the ventilation duct 314.

[0076] The radiator 33 is fully embedded inside the ventilation duct 314, and its outer contour matches the cross-sectional shape of the ventilation duct 314 to ensure that it does not obstruct airflow. The radiator shell 331 is made of a high thermal conductivity material (such as aluminum alloy or copper) and fits tightly against the inner surface of the device shell 31 to form a heat conduction path from the device shell 31 to the radiator shell 331. Multiple heat dissipation fins 332 (also made of a high thermal conductivity material) are arranged at intervals inside the shell. The fins are arranged parallel to each other along the extension direction of the ventilation duct 314, and gaps are formed between adjacent fins to allow airflow to pass through, ensuring that the airflow driven by the cooling fan 322 can pass smoothly through the fin gaps, while maximizing the contact area between the fins and the airflow.

[0077] In this embodiment, the heat collected by the device housing 31 is conducted to each heat dissipation fin 332 through the heat sink housing 331, so that the heat is diffused from the "local area of ​​the device housing 31" to the "full surface of multiple fins". The heat exchange area is effectively expanded, and the expanded heat exchange area enables the heat dissipation system to handle higher power heat (such as the peak power consumption when the main control board 2 is running large applications and multi-tasking).

[0078] In one embodiment, reference is made to Figure 10 A thermally conductive pad 34 is provided between the heat sink 33 and the housing base 311.

[0079] The thermal pad 34 is made of a highly elastic material with a high thermal conductivity. One side of it fits tightly against the bottom of the heat sink 33 (or the outer surface of the heat sink housing 331), while the other side contacts the inner surface of the housing base 311, completely filling the tiny gap between them. By placing the thermal pad 34 between the heat sink 33 and the housing base 311, the interface heat transfer bottleneck is solved in a simple and reliable way, enhancing the overall efficiency of the heat dissipation system.

[0080] In one embodiment, the housing base 311 is made of a material with high thermal conductivity (such as aluminum alloy or copper).

[0081] In one embodiment, reference is made to Figure 8 The cooling fan 322 is disposed in the ventilation duct 314 near the air intake duct 313, the radiator 33 is disposed in the ventilation duct 314 near the air exhaust duct 315, and the exhaust port 3212 of the cooling fan 322 faces the radiator 33.

[0082] In this embodiment, the cooling fan 322 is installed upstream of the ventilation duct 314 (near the side of the intake duct 313), and its exhaust port 3212 faces the downstream radiator 33 (near the side of the exhaust duct 315). A short transition space (or direct connection) is reserved between the two to ensure that all the airflow discharged by the fan 322 can enter the radiator 33. The cold air in the intake duct 313 first flows through the fan 322, and then is blown directionally towards the radiator 33 by the driving force of the fan 322, and finally discharged through the exhaust duct 315. The exhaust direction of the cooling fan 322, the extension direction of the fins of the radiator 33 and the direction of the ventilation duct 314 are completely consistent (e.g., both are horizontal), forming a straight airflow path of "intake → fan 322 → radiator 33 → exhaust", avoiding airflow loss or turbulence caused by direction changes.

[0083] Furthermore, the cooling fan 322 is positioned close to the air intake duct 313, meaning that the corresponding perforated hole 31111 on the housing base 311 is also close to the air intake duct 313. Cool air entering from the air intake hole 12 can quickly reach the main control board 2 area below the perforated hole 31111 without needing to travel a long distance. This short-path design allows the surface of the main control board 2 to be immediately replenished with cool air after the fan 322 draws away hot air. This rapid replenishment of airflow creates localized airflow disturbances below the perforated hole 31111, driving airflow on the surface of the main control board 2 and indirectly enhancing the convective cooling effect. Moreover, the timely replenishment of airflow when the cooling fan 322 is close to the air intake side prevents the formation of "negative pressure cavities" (i.e., a sudden drop in air pressure caused by the fan 322's suction force exceeding the airflow volume) within the air duct. A stable air pressure environment allows the fan 322 to always operate at its rated efficiency, reducing airflow attenuation due to air pressure fluctuations and ensuring a continuous and stable airflow supply to the heatsink 33.

[0084] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0085] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0086] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0087] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A mobile terminal, characterized in that, Includes a terminal housing (1), and the terminal housing (1) contains: The heat dissipation device (3) includes a device housing (31), and the device housing (31) is provided with an air inlet duct (313), a ventilation duct (314) and an exhaust duct (315) connected in sequence inside the device housing (314). A cooling fan (322) is provided inside the ventilation duct (314). The top and bottom of the terminal housing (1) are respectively provided with an exhaust hole (11) and an air inlet hole (12). The exhaust port (3151) of the exhaust duct (315) is aligned with the exhaust hole (11), and the air inlet (3131) of the air inlet duct (313) is aligned with the air inlet hole (12). The main control board (2) has the heat dissipation device (3) installed on at least one side.

2. The mobile terminal of claim 1, wherein, The exhaust vent (11) is centrally located at the top of the terminal housing (1), and the exhaust duct (315) extends obliquely toward the exhaust vent (11), so that the exhaust port (3151) is aligned with the exhaust vent (11). A control surface is provided on one side of the mobile terminal, and the exhaust duct (315) extends away from the control surface.

3. The mobile terminal of claim 1, wherein, The exhaust duct (315) is in the shape of a flared horn, and its flaring direction is from the ventilation duct (314) to the exhaust port (3151).

4. The mobile terminal of claim 1, wherein, The device housing (31) includes a housing base (311) and a housing cover (312), the housing cover (312) covering the housing base (311) to form the air inlet duct (313), the ventilation duct (314) and the exhaust duct (315).

5. The mobile terminal of claim 4, wherein, The shell base (311) includes a base body (3111) and an exhaust base plate (3112). The base body (3111) is arranged parallel to the main control board (2). The base body (3111) and the shell cover (312) form the air inlet duct (313) and the ventilation duct (314). The exhaust base plate (3112) is inclined relative to the base body (3111). The exhaust base plate (3112) and the shell cover (312) form the exhaust duct (315), so that the exhaust duct (315) extends inclined.

6. The mobile terminal of claim 4, wherein, A thermally conductive pad (35) is provided between the housing base (311) and the main control board (2), and the two sides of the thermally conductive pad (35) respectively contact the housing base (311) and the main control board (2).

7. The mobile terminal of claim 6, wherein, The main control board (2) includes a power chip (21), and the thermal pad (35) is correspondingly disposed on the power chip (21).

8. The mobile terminal of claim 4, wherein, The cooling fan (322) is installed on the shell cover (312), and the shell base (311) is provided with a hollow hole (31111) corresponding to the shell cover (312). The cooling fan (322) is aligned with the main control board (2) through the hollow hole (31111), so that the cooling fan (322) can draw air from the surface of the main control board (2).

9. The mobile terminal of claim 8, wherein, The cooling fan (322) includes a volute (321) and a fan (322) installed inside the volute (321). The volute (321) is installed on the upper cover (312). An air intake (3211) is provided on the side of the volute (321) facing the main control board (2), and an exhaust port (3212) is provided on the side facing the exhaust duct (315).

10. The mobile terminal of claim 1, wherein, The heat dissipation device (3) further includes a radiator (33) disposed in the ventilation duct (314). The radiator (33) includes a radiator shell (331) and a plurality of heat dissipation fins (332) spaced apart within the radiator shell (331). The radiator shell (331) contacts the inner surface of the device housing (31). The extending direction of the heat dissipation fins (332) is the same as the extending direction of the ventilation duct (314). The cooling fan (322) is disposed in the ventilation duct (314) near the air inlet duct (313). The radiator (33) is disposed in the ventilation duct (314) near the air outlet duct (315). The exhaust port (3212) of the cooling fan (322) faces the radiator (33).

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