Housing components and head-up display devices

Abstract

This disclosure provides a housing assembly and a head-up display (HUD) device. The housing assembly is used to support the optical elements of the HUD device. The housing assembly includes: a body; and a fixing structure, wherein the fixing structure includes a riveting portion disposed on one of the body and the optical element, and a mounting opening disposed on the other of the body and the optical element. The riveting portion passes through the mounting opening and engages with the mounting opening through thermoplastic deformation to fix the optical element and the body together. This housing assembly can solve the technical problems of low assembly efficiency, high stress concentration, and poor long-term stability in the optical element fixing methods of HUD devices in related technologies.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to housing assemblies and head-up display devices. Background Technology

[0002] With the development of intelligent technologies, augmented reality head-up displays (AR-HUDs) are gradually becoming the core interactive interface of smart cockpits. The HUD system projects light generated by the image generation unit onto the windshield through a series of precise optical mirrors, such as freeform mirrors and folding mirrors, thus forming a virtual image in front of the driver's line of sight. To ensure the clarity and overlap of the large field of view and the long-distance virtual image, the spatial positioning accuracy of the optical elements in the optical path is crucial.

[0003] However, vehicles operate in extremely harsh environments, involving wide-range temperature cycling and continuous mechanical vibration. Maintaining nanometer- or micrometer-level positioning accuracy of optical components under such dynamic and severe physical conditions, while simultaneously considering the efficiency and cost of large-scale automated production, remains a persistent challenge in the field of automotive optical structure design. Improperly designed mounting structures can easily lead to image ghosting, distortion jitter, or even irreversible damage to optical components, severely impacting driving experience and safety. Utility Model Content

[0004] To address the aforementioned technical problems, this disclosure provides a housing assembly and a head-up display device, which can solve the technical problems of low assembly efficiency, high stress concentration, and poor long-term stability in the fixing methods of HUD optical elements in related technologies.

[0005] The technical solution disclosed herein is implemented as follows: In a first aspect, embodiments of this disclosure provide a housing assembly for supporting optical elements of a head-up display device. The housing assembly includes a body and a fixing structure, wherein the fixing structure includes a riveting portion disposed on one of the body and the optical element, and a mounting opening disposed on the other of the body and the optical element. The riveting portion passes through the mounting opening and engages with the mounting opening through thermoplastic deformation to fix the optical element and the body together.

[0006] In a second aspect, embodiments of this disclosure provide a head-up display device, the head-up display device including a housing assembly according to the first aspect and optical elements fixed by the housing assembly.

[0007] This disclosure provides a housing assembly and a heads-up display device. The housing assembly utilizes thermoplastic deformation riveting instead of traditional screws or adhesives, eliminating additional fasteners and curing time, significantly improving production cycle time. In particular, the composite structure combining a metal core and a thermoplastic layer leverages the rheological properties of the outer plastic to achieve zero-gap filling of the mounting opening, preventing vibration and shaking, while the high modulus of the inner metal core resists creep failure under long-term high temperatures. Furthermore, integrated heat dissipation elements, a vacuum positioning structure, and electronic tags further solve the challenges of thermal management, assembly accuracy, and full lifecycle traceability, demonstrating significant substantive features and substantial progress. Attached Figure Description

[0008] Figure 1 A schematic top view of the head-up display device and housing assembly provided in an embodiment of this disclosure.

[0009] Figure 2 A schematic top view of the housing assembly and optical elements provided in an embodiment of this disclosure.

[0010] Figure 3 A schematic side view of a portion of a housing assembly provided in an embodiment of this disclosure.

[0011] Figure 4 for Figure 3 A schematic side view of the housing assembly in another state is shown.

[0012] Figure 5 A schematic top view of a housing assembly and optical elements provided for another embodiment of this disclosure.

[0013] Figure 6 A schematic side view of a housing assembly provided for another embodiment of this disclosure.

[0014] Figure 7 A schematic top view of a head-up display device and housing assembly provided for another embodiment of this disclosure. Detailed Implementation

[0015] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0016] When constructing high-precision automotive optical systems, such as AR-HUDs, designers often need to find a balance between the conflicting physical requirements of rigid positioning and stress relief. On the one hand, to prevent optical components, such as mirrors, from shifting or resonating during random vibrations generated by vehicle movement, the mounting structure must provide sufficient clamping force and rigidity. On the other hand, optical components are typically made of glass or optical-grade plastics, while the housing base is usually made of engineering plastics, such as PC / ABS, and the coefficients of thermal expansion (CTE) of the two differ significantly. For example, the CTE of optical glass is typically in the range of 4–9 ppm / °C, while the CTE of reinforced PC / ABS can be as high as 40–70 ppm / °C. Under automotive environments, such as temperature shocks from -40°C to 85°C, this mismatch in material properties can generate enormous thermal stress at the contact interface.

[0017] Traditional mechanical locking methods, such as screws with clamping plates, can provide high initial preload, but the hard contact between the metal screw and the brittle optical element easily creates stress concentration points. More importantly, engineering plastics have inherent viscoelasticity; under long-term continuous axial loads from screws, the plastic matrix inevitably undergoes stress relaxation or creep, causing the preload to decay over time. Once the preload drops below a critical threshold, the optical element will experience fretting wear or positional drift under vibration, leading to optical path misalignment. Furthermore, screw installation usually requires pre-drilled through-hole clearance, which introduces assembly tolerances in principle, making it difficult to achieve zero-clearance precision positioning.

[0018] Another common bonding medium is adhesives. While chemical bonding can provide a more uniform stress distribution, in modern production lines that demand high-speed operation, the curing time of the adhesive, whether UV-cured or heat-cured, often becomes a bottleneck to production efficiency. Furthermore, organic adhesives pose an aging risk in high-temperature and high-humidity environments, and the volume shrinkage during curing can cause precisely calibrated optical components to deviate from their theoretical positions. Even worse, some adhesives may release volatile gases at high temperatures, which can condense on the optical surface, forming haze and reducing luminous efficiency.

[0019] Based on an in-depth analysis of the rheological properties, thermodynamic behavior, and precision manufacturing processes of the aforementioned materials, it was found that relying solely on existing single connection mechanisms is insufficient to simultaneously meet the comprehensive requirements of automotive-grade HUDs for high rigidity, low stress, creep resistance, and high production efficiency. Therefore, it is particularly necessary to develop a composite fixing system that can utilize the material's own thermoplastic rheological behavior to achieve zero-gap filling and introduce a high-modulus skeleton to resist long-term creep.

[0020] In view of this, this application provides a systematic solution based on composite material reinforcement and multiphysics assistance.

[0021] Please see Figure 1 and Figure 2 This embodiment provides a housing assembly 10 for carrying the optical element 12 of the head-up display device 100.

[0022] The head-up display device 100 is typically installed inside the dashboard of a car. The image generation unit (PGU) generates light carrying image information, which is projected onto the optical element 12 carried by the housing assembly 10.

[0023] The optical element 12 is typically a freeform mirror or a planar folding mirror with a highly reflective optical film coated on its surface. After being reflected by the optical element 12, light is projected onto the windshield of the car and ultimately reflected into the driver's line of sight, thus forming a suspended virtual image in front of the driver.

[0024] like Figure 1 and Figure 2 As shown, the housing assembly 10 mainly includes a body 11 and a fixing structure 20. The body 11 is the structural skeleton of the entire assembly.

[0025] In some embodiments, the body 11 is integrally molded from a high-strength, low-warpage engineering plastic, such as polycarbonate PC, polybutylene terephthalate PBT, or polyamide PA66, using a precision injection molding process.

[0026] However, this disclosure is not limited thereto. Depending on different heat dissipation or strength requirements, the body 11 may also be made of metal, such as die-cast aluminum alloy or magnesium alloy.

[0027] Accordingly, the choice of material for the optical element 12 is also flexible.

[0028] In addition to glass materials, such as aluminized glass mirrors, the optical element 12 can also be made of optical-grade engineering plastics, such as cyclic olefin copolymers (COC), cyclic olefin polymers (COP), or polymethyl methacrylate (PMMA). Plastic optical elements 12 have the advantages of being lightweight and easy to mold complex curved surfaces, such as high-order freeform surfaces.

[0029] The design of the fixing structure 20 can replace the screw fastening or glue bonding process in related technologies. The fixing structure 20 includes a riveting part 21 provided on one of the body 11 and the optical element 12, and a mounting opening 22 provided on the other of the body 11 and the optical element 12.

[0030] Specifically, depending on the different combinations of materials of the body 11 and the optical element 12, the layout of the fixing structure 20 has the following preferred embodiments.

[0031] In one implementation, see Figure 2 The body 11 is made of engineering plastic, while the optical element 12 is made of glass or plastic. For ease of manufacturing, the riveting part 21 is integrally formed on the body 11, while the mounting opening 22 is formed on the optical element 12.

[0032] See Figure 3 In its initial state, the riveting portion 21 is a rod 211 extending vertically outward from the surface of the body 11. During assembly, the rod 211 passes through the mounting opening 22 and forms a rivet joint 212 through a hot riveting process, pressing the optical element 12 together. See [link to documentation]. Figure 4 .

[0033] In another embodiment, the optical element 12 is made of engineering plastic, and the body 11 is also made of plastic. In this case, the fixing principle and method are the same as in the above embodiment. That is, the riveting part 21 on the plastic body 11 passes through the mounting opening 22 on the plastic optical element 12, and is fixed by thermoplastic deformation. This "all-plastic" solution has excellent material compatibility and a higher degree of matching of thermal expansion coefficients, which helps to reduce internal stress.

[0034] In another embodiment, a "reverse" fixing strategy can be adopted, which is applicable to scenarios where the body 11 is made of metal. In this embodiment, the mounting opening 22, such as a slot or hole, is formed on the metal body 11. Correspondingly, the riveting part 21 is directly injection molded integrally onto the edge or non-optical surface of the optical element 12 made of engineering plastic.

[0035] During assembly, the rod 211 on the optical element 12 passes through the mounting opening 22 on the body 11. Then, a hot riveting process is applied to the end of the rod 211. Because the optical element 12 itself is thermoplastic, its extended portion softens and deforms upon heating, forming a riveting joint 212, thereby "reversely mounting" or fixing the optical element 12 to the body 11. This design cleverly solves the problem of metal bodies not being able to be directly hot-riveted, while also utilizing the ease with which plastic optical elements can be integrated into complex structures, achieving the same stable fixing effect.

[0036] Regardless of the form described above, the fit between the riveting part 21 and the mounting opening 22 follows the initial design of clearance fit to facilitate quick positioning.

[0037] The fixing process employs a thermal riveting technique. This is a complex physical process involving heat conduction, phase change, and rheology. A preheated metal heating head contacts the tip of the rod 211; this temperature is, for example, between 230°C and 280°C, depending on the plastic material of the riveted part 21. Heat is rapidly transferred to the interior of the plastic, raising its temperature to above the glass transition temperature (Tg) or melting point. The material changes from a glassy state to a highly elastic state, and then to a viscous flow state. Under the axial pressure applied by the heating head, the softened plastic undergoes rheological deformation.

[0038] like Figure 3 and Figure 4 As shown, the deformed material forms a rivet joint 212 at the end of the rod 211. The shape of the rivet joint 212 is determined by the mold profile of the heating head, and is typically mushroom-shaped, hemispherical, or flat-headed. In some embodiments, the diameter of the rivet joint 212 is larger than the diameter of the mounting opening 22 (e.g., ...). Figure 4 (As shown by the dashed line in the middle), thereby firmly pressing the optical element 12 onto the bearing surface of the body 11.

[0039] This thermoplastic deformation fixing method has certain advantages compared to related technologies.

[0040] First, during the hot riveting process, the softened rod 211, under axial pressure, undergoes not only axial compression but also radial expansion. This expansion causes the outer wall of the rod 211 to expand outward until it tightly fits against the inner wall of the mounting opening 22. The original assembly gap (see...) Figure 3 The optical element 12 is completely filled with molten plastic. This means that the fixing structure 20 achieves a true "zero-gap" fit. During the severe vibrations of vehicle operation, the optical element 12 has no room for any micro-movement in the horizontal direction, thus fundamentally eliminating the problem of optical axis jitter caused by assembly gaps.

[0041] Furthermore, the rivet joint 212 is made of a viscoelastic polymer material. Compared to the rigid clamping of metal screws, the rivet joint 212 provides a certain degree of flexible damping buffer when clamping the optical element 12. When drastic changes in ambient temperature cause a difference in thermal expansion between the optical element 12 and the body 11 due to CTE mismatch, the slight elastic deformation capability of the rivet joint 212 can absorb part of the thermal stress, acting as a thermal stress buffer and effectively preventing the brittle optical element 12 from shattering due to excessive stress.

[0042] To facilitate the rapid installation and subsequent maintenance of the head-up display device 100 on the vehicle production line, this embodiment also features an integrally formed quick-release interface (not shown) on the side of the main body 11. This quick-release interface can be designed as a snap-fit ​​structure. Considering that the quick-release structure needs to withstand repeated disassembly and assembly stresses, the material of the main body 11, or at least the quick-release interface portion, is preferably a high-strength modified engineering plastic, such as glass fiber reinforced nylon or polyamide. This material combination not only provides sufficient toughness to support the elastic deformation of the snap-fit ​​but also has excellent heat resistance, enabling it to withstand the high-temperature environment inside the HUD.

[0043] While conventional all-plastic hot-riveting joints solve the problems of assembly gaps and stress concentration, pure plastic riveting joints are prone to creep under automotive-grade high-temperature and high-load conditions. To address this deeper material mechanics issue, this embodiment innovatively improves the internal structure of the riveting joint 21.

[0044] Please combine Figure 3 and Figure 4 The riveting part 21 is not made of a single plastic material, but adopts a composite structure of "flexible on the outside and rigid on the inside". Specifically, the riveting part 21 includes a core 213 located at the geometric center and a thermoplastic plastic layer 214 covering the outer periphery of the core 213.

[0045] The core 213 (such as Figure 3 The core 213 (shown by the dashed line) serves as the mechanical framework of the entire fixed structure and is made of a high-modulus metal. In some examples, a copper substrate 2131, such as brass or phosphor bronze, is used. From a materials mechanics perspective, copper has a Young's modulus of approximately 110 GPa, while ordinary reinforced engineering plastics typically have a modulus of only 2–10 GPa. This means that under the same shear or bending load, the deformation resistance of the core 213 is tens of times that of pure plastic. The core 213 is typically pre-embedded in the body 11 using an insert injection molding process, with its root deeply embedded inside the body 11 to achieve strong anchoring force. Its shaft extends upwards, with its height designed to be slightly less than or equal to the thickness of the optical element 12.

[0046] In some further embodiments, to achieve closed-loop control of the riveting process, the internal structure of the riveting part 21 can also adopt a "pressure feedback" design. In this scheme, the core 213 is not simply a solid metal, but is designed as a composite structure of "elastomer + sensor". Specifically, the main body of the core 213 is made of high-strength polyurethane elastomer material, and a miniature piezoresistive pressure sensor is encapsulated inside.

[0047] This allows the built-in pressure sensor to monitor axial pressure data in real time during the hot riveting process. When the monitored pressure reaches a preset threshold, such as 0.3MPa to 0.35MPa, the system can automatically determine that the riveting is complete and stop applying pressure. This "sensory" fixing structure, combined with the elastic rebound of polyurethane material, not only prevents overpressure from causing the optical element 12 to shatter, but also continuously monitors the preload state of the fixing point throughout the vehicle's entire life cycle. Once loosening is detected (pressure drop), an alert can be issued through the vehicle's onboard system.

[0048] The thermoplastic layer 214 tightly covers the side of the core 213, and forms a pure plastic area at one end of the core 213 extending from the mounting opening 22. Figure 3 The plastic portion above the top of the core. During the hot riveting process, only this pure plastic area and the plastic layer covering the sides of the core participate in softening and deformation to form the riveting joint 212 and fill the gap, while the internal metal core 213 remains rigid and does not deform.

[0049] In some specific implementations, segmented mold temperature control technology can be used during the injection molding process of the housing assembly 10. Specifically, the mold temperature in the area where the metal core 213 (insert) is placed in the mold is set to be about 10°C to 15°C lower than the injection temperature of the molten plastic or the temperature of other areas of the mold.

[0050] The advantage of this differentiated temperature control strategy is that the lower temperature in the insert region promotes rapid cooling and solidification of the plastic melt surrounding the core 213, thereby forming a dense crystalline layer at the interface between the core 213 and the plastic layer (for semi-crystalline plastics). This not only improves the bonding strength of the interface but also significantly reduces the residual internal stress caused by uneven cooling shrinkage, fundamentally solving the problem of stress cracking in traditional insert injection molded parts at high temperatures.

[0051] Furthermore, metal and plastic are two completely different materials, and their interfacial bonding is often weak. During high-temperature injection molding and subsequent hot riveting processes, the copper substrate is prone to oxidation and blackening, forming a loose copper oxide layer, which causes the plastic coating to peel off after long-term use.

[0052] Therefore, in some embodiments of this disclosure, the core 213 may include a copper substrate and a nickel plating layer disposed on the surface of the copper substrate. Because nickel has excellent oxidation resistance, it can effectively prevent the copper substrate from oxidizing at injection molding high temperatures (approximately 260°C) and hot riveting high temperatures, ensuring the chemical stability of the interface. Furthermore, the surface of the electroplated or electroless nickel plating layer typically has a specific microcrystalline texture; this roughness can form a stronger mechanical interlocking effect with the molten thermoplastic layer 214.

[0053] In precision optical systems, to further improve the mounting accuracy of optical components 12, the kinematic design principle of "separation of positioning and locking" must be followed. If the riveting part 21 is relied upon to simultaneously perform positioning and locking functions, the flow of plastic during the hot riveting process may cause slight positional drift.

[0054] Therefore, in some embodiments of this disclosure, in addition to the riveting part 21, the body 11 is also provided with a dedicated positioning post 31. Correspondingly, the optical element 12 is provided with a positioning opening 32.

[0055] Please see Figure 2 and Figure 5 The positioning post 31 is typically injection molded directly from a high-precision mold or is a precision metal pin installed later. The positioning post 31 does not participate in hot riveting deformation during assembly, maintaining its original geometric shape and dimensional accuracy at all times. The positioning opening 32 is typically designed as an elongated or oblong hole, which, when engaged with the positioning post 31, restricts the degrees of freedom of the optical element 12 in the plane perpendicular to the optical axis, such as restricting rotational and translational degrees of freedom.

[0056] The riveting part 21 provides axial fastening force and allows its shape to change during the hot riveting process to accommodate thickness tolerances; while the positioning post 31 ensures the positional accuracy of the optical element 12 in the plane, completely unaffected by fluctuations in the hot riveting process, such as slight offsets of the heating head. The two do not interfere with each other, thus ensuring the optical path stability of the optical element 12 under complex working conditions.

[0057] With the popularization of AR-HUD technology, the brightness of PGU is getting higher and higher. Moreover, the optical element 12 is located above the dashboard and is exposed to direct sunlight for a long time, facing a serious solar backflow heat effect. The local high temperature accumulation will not only accelerate the aging of the plastic body 11, but also cause uneven thermal expansion of the optical element 12, and even cause coating failure.

[0058] To address this thermal issue, in some embodiments of this disclosure, a plurality of heat dissipation elements 41 are integrally formed on the surface of the body 11 opposite to the optical element 12, i.e., the non-optical surface, the back of the structure. For example... Figure 6 As shown, these heat dissipation elements 41 can be designed as arrayed heat dissipation fins or columnar protrusions. These fins significantly increase the contact area between the body 11 and the surrounding ambient air, dissipating heat through natural convection or forced convection.

[0059] To establish an effective heat conduction path from optical element 12 to heat dissipation element 41, see [link to relevant documentation]. Figure 6In some embodiments of this disclosure, a heat-conducting element 42 is provided inside or on the surface of the body 11. The heat-conducting element 42 may be a pre-embedded heat-conducting silicone strip, a high heat-conducting graphite sheet, or an area injection molded from heat-conducting plastic.

[0060] like Figure 6 As shown, one end of the heat-conducting element 42 is close to the hot spot area (usually the light converging area) on the back of the optical element 12, and the other end passes through the wall thickness of the body 11 and is close to the heat dissipation element 41. With this design, the heat absorbed by the optical element 12 can be quickly conducted to the back of the body 11 through the heat-conducting element 42 and dissipated through the heat dissipation element 41.

[0061] In automated assembly, ensuring that the optical element 12 remains perfectly aligned with the reference surface just before hot riveting is crucial for process control. Mechanical clamping devices in related technologies can easily scratch the surface of the optical element or introduce additional assembly stress.

[0062] Pneumatically assisted positioning technology is introduced in some embodiments of this disclosure. See also Figure 7 The main body 11 has a vacuum channel 51 inside. This vacuum channel 51 is an internal cavity formed during injection molding by a core-pulling mechanism, or a passageway formed by air tubes. One end of the vacuum channel 51 is connected to an external vacuum generator, such as a vacuum pump or a venturi tube (not shown in the figure), and the other end extends to the surface of the main body 11 that supports the optical element 12, forming a micro-suction vacuum positioning area 52. This micro-suction vacuum positioning area 52 can be one or more tiny suction cup structures, or a porous, breathable material area.

[0063] During assembly, a vacuum generator creates negative pressure in the micro-suction vacuum positioning zone 52. This negative pressure value is carefully calculated to generate sufficient suction force to resist disturbances during hot riveting without causing deformation of the thin-walled optical element 12. After the riveting joint 212 cools and sets, and is permanently fixed, the vacuum is removed. This design internalizes process-aided methods into the product structure, greatly improving assembly yield and positional accuracy.

[0064] To meet the requirements of traceability, anti-counterfeiting, and intelligent parameter compensation for modern automotive parts, this embodiment introduces embedded electronic technology.

[0065] In some embodiments of this disclosure, see Figure 6The near-field communication (NFC) tag 60 is embedded within the injection-molded layer of the body 11. This NFC tag 60 employs a high-temperature resistant encapsulation process, being pre-placed within the mold during the injection molding of the body 11 and subsequently completely sealed by the molten plastic. The NFC tag 60 features an ultra-thin design, with a thickness ≤0.3mm, and possesses extremely high temperature resistance, capable of withstanding mold temperature shocks exceeding 80°C, and even instantaneous 260°C, during injection molding without failure. This in-mold electronics process makes the NFC tag 60 an integral part of the body 11, providing extremely high physical security, including waterproofing, dustproofing, and tamper resistance.

[0066] The electronic tag can store a unique, encrypted hardware ID within its 60-inch capacity. OEMs or aftermarket terminals can read this ID using an NFC reader to verify the authenticity of the HUD component, effectively preventing substandard aftermarket parts from entering the market and ensuring driving safety.

[0067] Each optical element 12 undergoes high-precision optical inspection before leaving the factory, and its minute surface shape errors (such as radius of curvature deviation and wavefront aberration) are recorded in the electronic tag 60. After the assembly is installed in the vehicle, the HUD controller reads this deviation data and uses software algorithms to perform reverse digital compensation (warping) on ​​the image generated by the PGU, thereby eliminating optical distortion. This means that electronic compensation reduces the stringent requirements for the physical processing precision of the optical element 12, significantly reducing manufacturing costs.

[0068] The electronic tag 60 can also record the component's production date, batch number, raw material information, injection molding process parameters, etc. In the event of a quality problem, it enables rapid end-to-end traceability, providing tamper-proof data support for quality analysis and recall.

[0069] In summary, the housing components and head-up display device provided in this disclosure, through the organic combination of a series of innovative designs, enhance the product in various aspects.

[0070] First, by utilizing a metal-plastic composite riveting structure, combining the high rigidity and creep resistance of metal with the thermoplastic zero-gap filling capability of plastic, the problems of loosening and stress concentration inherent in traditional fixing methods are solved. Furthermore, through a separation design for positioning and locking, and a vacuum adsorption process to assist the structure, micron-level positioning accuracy of optical components is achieved. Additionally, an integrated thermal management system effectively reduces the heat load at high temperatures, improving the stability of optical performance. Moreover, embedded NFC electronic tags enable anti-counterfeiting, parameter compensation, and full lifecycle traceability of components.

[0071] This systematic solution not only overcomes many shortcomings of traditional fixed methods, but also provides a highly reliable, efficient and intelligent technical path for the large-scale mass production of automotive-grade AR-HUDs.

[0072] It should be noted that the technical solutions described in the embodiments of this disclosure can be combined arbitrarily without conflict.

[0073] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A housing assembly for supporting optical elements of a head-up display device, characterized in that, The housing assembly includes: The subject; and Fixed structure The fixing structure includes a riveting portion disposed on one of the body and the optical element, and a mounting opening disposed on the other of the body and the optical element. The riveting part passes through the mounting opening and engages with the mounting opening through thermoplastic deformation to fix the optical element to the body.

2. The housing assembly according to claim 1, characterized in that, The riveting part is disposed on the body, and the mounting opening is formed on the optical element; The riveting portion includes a rod extending from the surface of the body and a rivet head disposed at the end of the rod, wherein the rivet head is formed by thermoplastic deformation and extends at least partially out of the opening for pressing the optical element against the body.

3. The housing assembly according to claim 2, characterized in that, The riveting part includes a metal core and a thermoplastic layer covering the core.

4. The housing assembly according to claim 3, characterized in that, The core comprises a copper substrate and a nickel plating layer disposed on the surface of the copper substrate.

5. The housing assembly according to claim 2, characterized in that, The body includes a positioning post protruding from the surface of the body, and the optical element has a positioning opening that cooperates with the positioning post.

6. The housing assembly according to claim 1, characterized in that, The surface of the body facing away from the optical element is provided with multiple heat dissipation elements.

7. The housing assembly according to claim 6, characterized in that, The body has a heat-conducting element inside, one end of which is in contact with the optical element, and the other end is thermally coupled to the heat dissipation element.

8. The housing assembly according to claim 1, characterized in that, The body has a vacuum channel inside, and the surface of the body that carries the optical element is provided with a micro-suction vacuum positioning area that communicates with the vacuum channel. The micro-suction vacuum positioning area is used to adsorb the optical element by negative pressure during the riveting process.

9. The housing assembly according to claim 1, characterized in that, The body is embedded with a near-field communication electronic tag, which is located inside the injection molding layer of the body.

10. A head-up display device, characterized in that, It includes a housing assembly according to any one of claims 1 to 9 and an optical element fixed by said housing assembly.

Images