Fixing structure for touch switch, touch switch assembly and head-up display device

Abstract

The invention provides a fixing structure for a light touch switch, a light touch switch assembly and a head-up display device. The fixing structure comprises a bottom wall; the side wall and the limiting assembly are arranged on the same side of the bottom wall, and the limiting assembly, the side wall and the bottom wall define an accommodating space for accommodating a touch switch; the touch switch comprises a bottom wall, a side wall and a limiting assembly, the connecting assembly is used for connecting the touch switch to the bottom wall in a first direction, the limiting assembly is arranged to be matched with the side wall so as to limit the touch switch to move in a first plane, and the limiting assembly partially extends to be opposite to the bottom wall so as to limit the touch switch to move in the first plane. And the limiting part is arranged on the bottom wall to be matched with the bottom wall to limit the light touch switch to move in the first direction, and the first direction is perpendicular to the first plane. Through the fixing structure, the technical problems of low assembly efficiency, poor connection stability, insufficient limiting, inconvenience in maintenance and the like in the prior art can be solved.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a mounting structure for a tactile switch, a tactile switch assembly, and a head-up display device. Background Technology

[0002] As a commonly used human-computer interaction component in electronic devices, the stability of the fixed structure and the assembly efficiency of tactile switches are crucial to the overall quality of the product, especially in application scenarios with stringent requirements for space and reliability, such as head-up displays.

[0003] In related technologies, the fixing of tactile switches mostly relies on traditional screw fastening or simple limiting blocks. This method of fixing often requires multiple alignment and tightening steps, resulting in low efficiency and high labor and time consumption. During assembly, the non-screw-fastened side of the switch, lacking effective vertical constraint, is prone to warping or inaccurate positioning. This not only affects the final locking quality but may also lead to switch malfunction, reducing the product's connection stability and vibration resistance. Summary of the Invention

[0004] This application provides a fixing structure for a tactile switch, a tactile switch assembly, and a head-up display device. The fixing structure can solve the technical problems existing in related technologies, such as low assembly efficiency, poor connection stability, insufficient limit, and inconvenient maintenance.

[0005] This application provides a fixing structure for a tactile switch. The fixing structure may include: a bottom wall; a side wall and a limiting component disposed on the same side of the bottom wall; and a connecting component. The limiting component, the side wall, and the bottom wall define a receiving space for accommodating the tactile switch. The connecting component is used to connect the tactile switch to the bottom wall in a first direction. The limiting component is configured to cooperate with the side wall to restrict displacement of the tactile switch in a first plane. The limiting component extends partially opposite the bottom wall to cooperate with the bottom wall to restrict displacement of the tactile switch in the first direction, wherein the first direction is perpendicular to the first plane.

[0006] This application also provides a tactile switch assembly. The tactile switch assembly may include: a tactile switch; and a fixing structure as described above. The tactile switch can be housed within the receiving space of the fixing structure and is jointly fixed by the connecting component and the limiting component.

[0007] This application also provides a head-up display device. The head-up display device may include the tactile switch assembly described above.

[0008] In the technical solution of this application embodiment, the fixing structure provides a receiving space and a bottom support, and uses a connecting component to press and fix the tactile switch to the bottom wall on the first side, while a limiting component is provided on the other side of the tactile switch. The limiting component extends above the tactile switch, forming a mechanical stop on the side of the tactile switch away from the bottom wall. Through the synergistic effect of this single-sided locking and the opposite-side mechanical limiting, the structure achieves a stable clamping and constraint of the tactile switch along a first direction, such as the vertical direction, overcoming the technical problem in related technologies that the non-fastener side of the switch is prone to warping or inaccurate positioning. Based on this, the connection reliability and stability are significantly improved, especially in harsh vehicle environments subjected to vibration, impact, or frequent pressing, effectively preventing vertical displacement and warping of the tactile switch and ensuring the long-term stability of the device. In addition, this design allows for the use of fewer fasteners, such as only single-sided screws, thereby simplifying the assembly process and improving production efficiency. Attached Figure Description

[0009] Figure 1 A schematic perspective view of a portion of a head-up display device provided in an embodiment of this application.

[0010] Figure 2 This is a schematic exploded perspective view of a tactile switch assembly provided in an embodiment of this application.

[0011] Figure 3 A schematic cross-sectional view of a tactile switch assembly provided in an embodiment of this application.

[0012] Figure 4 A schematic perspective view of the fixing structure provided in the embodiments of this application.

[0013] Figure 5 A schematic cross-sectional view of a portion of a tactile switch assembly and a head-up display device provided in an embodiment of this application.

[0014] Figure 6 A schematic exploded perspective view of a portion of a tactile switch assembly and a head-up display device provided in an embodiment of this application.

[0015] Figure 7 A schematic perspective view of a portion of a fixed structure and a head-up display device provided in another embodiment of this application. Detailed Implementation

[0016] The technical solutions in this disclosure will now be clearly and completely described with reference to the accompanying drawings.

[0017] See Figure 1This application provides a fixing structure 100. This fixing structure 100 is mainly used to securely fix a tactile switch 200 to a carrier, such as to the housing 400A of a head-up display (HUD) 400, in conjunction with fasteners 300. Considering that the HUD, as an in-vehicle electronic device, needs to withstand engine vibration, road bumps, and high and low temperature cycles for extended periods, the design of the fixing structure 100 needs to address the problem of the tactile switch 200 easily shifting or tilting in traditional fixing methods.

[0018] The fixed structure 100, as an independent mounting module, is highly modular and can be injection molded independently. This design allows the fixed structure 100 to be pre-assembled with the tactile switch 200 on the production line: workers do not need to adjust the position of the tactile switch 200 and the fixed structure 100 on the HUD production line; they only need to place the pre-assembled tactile switch assembly 10 (see [link to assembly]). Figure 2 The assembly of the fixed structure 100 and the tactile switch 200 can be installed into the housing 400A as a whole, which realizes the "align and place" quick positioning of the tactile switch 200, greatly simplifies the multi-step locking process in traditional technology, and is a significant improvement compared with the existing technology.

[0019] See Figure 2 The diagram illustrates a tactile switch assembly 10. The fixing structure 100 of the tactile switch assembly 10 includes a bottom wall 110, side walls 120, a limiting component 130, and a connecting component 140. The tactile switch 200 is mounted within a receiving space 150 defined by the bottom wall 110, side walls 120, and limiting component 130, and is securely restrained by the synergistic action of the connecting component 140 and the limiting component 130. This synergy forms a three-dimensional constraint system combining horizontal closure and vertical clamping. The connecting component 140 provides a downward locking force, while the limiting component 130 provides both horizontal lateral stop and upward mechanical support; together, they fundamentally eliminate the risk of displacement of the tactile switch 200.

[0020] For ease of description, a Cartesian coordinate system is first defined. The first direction Z is perpendicular to the bottom wall 110, which is usually the assembly direction and pressure direction of the tactile switch 200; the second direction X and the third direction Y are both perpendicular to the first direction Z and parallel to the bottom wall 110. Thus, the second direction X and the third direction Y jointly define the first plane, which is the plane in which the tactile switch 200 is most prone to slippage under vehicle vibration, and is also the area in which the traditional fixed structure is most prone to limit failure.

[0021] The bottom wall 110 forms the basic support part of the fixing structure 100. Its direct function is to provide a stable installation reference, ensuring that the tactile switch 200 is evenly supported by the bottom wall 110, so as to avoid uneven force on the tactile switch 200 and potential damage. Specifically, the bottom wall 110 supports the tactile switch 200 through its bearing surface 110A. The bearing surface 110A can be designed with a specific profile according to the actual application scenario. For example, if the bearing surface of the tactile switch 200 has a protrusion, the bearing surface 110A can be correspondingly provided with a recess or through hole to support the tactile switch 200 with the largest possible contact area, further improving the support stability.

[0022] The sidewall 120 can be disposed on one side of the bottom wall 110 and extend substantially perpendicularly to the bottom wall 110. For example... Figure 2 As shown, the side wall 120 can be disposed on the bearing surface 110A of the bottom wall 110 and located at the edge of the bearing surface 110A. Its height design must be lower than the height of the tactile switch 200 to avoid obstructing the top pressing area of ​​the tactile switch 200, while ensuring that it can effectively stop the side of the tactile switch 200.

[0023] The sidewall 120 can extend continuously around the circumferential edge of the bottom wall 110, or it can include multiple discrete parts. By providing multiple discrete sidewalls 120, an assembly entry point can be provided while ensuring a limiting effect. For example... Figure 2 In the middle, the side wall 120 includes two independent parts: one part is located generally on the opposite side of the limiting component 130 and includes two segments perpendicular to each other to form a stop on the front end and left side of the tactile switch 200 in the second direction X and the third direction Y at the same time; the other part is located on the adjacent side of the limiting component 130 and forms a generally perpendicular relationship with the limiting component 130 to form a supplementary stop on the other end of the tactile switch 200.

[0024] With this arrangement, the side wall 120 can provide a rigid stop surface for the tactile switch 200 on the first plane, preventing scratches on the side housing of the tactile switch 200, while reducing frictional noise between the tactile switch 200 and the side wall 120, preventing abnormal noises caused by vibration in the vehicle environment. This design effectively prevents the tactile switch 200 from moving within the first plane, achieving initial positioning and laying the foundation for the subsequent locking of the connecting assembly 140 and the precise limiting of the limiting assembly 130.

[0025] The limiting component 130 and the side wall 120 are located on the same side of the bottom wall 110, and the limiting component 130 is at least partially opposite to the side wall 120. "At least partially opposite" means that the limiting component 130 does not need to be completely symmetrical with the side wall 120, but is specifically arranged according to the force characteristics of the tactile switch 200. The side of the tactile switch 200 closer to the connecting component 140 has a lower risk of displacement due to the locking force constraint, while the side farther from the connecting component 140 has a higher risk of displacement. Therefore, the limiting component 130 is mainly arranged on the side of the tactile switch 200 away from the connecting component 140, forming a key protection area.

[0026] The limiting component 130, side wall 120, and bottom wall 110 together define a receiving space 150 for accommodating the tactile switch 200. The dimensions of the receiving space 150 must balance assembly convenience and limiting stability, ensuring that the tactile switch 200 can be smoothly installed without excess space causing wobbling. Specifically, the dimension in the first direction Z is consistent with the height of the tactile switch 200, ensuring that the top of the tactile switch 200 can contact the limiting component 130 after installation. The establishment of the receiving space 150 modularizes and standardizes the placement area of ​​the tactile switch 200, providing a structural basis for subsequent precise limiting and rapid assembly, and avoiding assembly defects caused by dimensional errors of the housing 400A when the tactile switch 200 directly mates with the housing 400A in traditional technologies.

[0027] The size and shape of the receiving space 150 match the shape of the tactile switch 200, ensuring that the tactile switch 200 can be precisely accommodated within it. The side walls 120 and the limiting components 130, located on opposite sides of the tactile switch 200, can jointly limit the tactile switch 200. This "opposing limiting" completely constrains the range of motion of the tactile switch 200 within the first plane through the cooperation of the side walls 120 and the limiting components 130, preventing the tactile switch 200 from lateral slippage even under strong vibration.

[0028] The connecting assembly 140 is used to connect the tactile switch 200 to the base wall 110 in the first direction Z. The connecting assembly 140 may include a mounting hole 141 formed in the base wall 110 for engaging with a fastener 300, such as a screw, to press and fix the tactile switch 200 onto the base wall 110 by tightening the screw. The connecting assembly 140 provides an active locking force, firmly pressing the tactile switch 200 onto the base wall 110, which is the basis for achieving precise connection and mechanical fixation. Compared to related technologies that rely on multiple screws for tightening, initial fixation can be achieved with a single connecting assembly 140. Combined with the stop of the limiting assembly 130, the number of fasteners 300 used is significantly reduced, simplifying the assembly process.

[0029] The limiting component 130 can cooperate with the side wall 120 to jointly restrict the displacement of the tactile switch 200 within the first plane. In fact, the coordinated limiting by the side wall 120 and the limiting component 130 within the first plane constitutes a precise two-dimensional positioning frame, completely constraining the tactile switch 200's degrees of freedom of movement within the first plane. This effectively prevents lateral slippage due to inertial forces during assembly, transportation, or vibration environments, ensuring the uniqueness and accuracy of the switch position. This positioning effect is unattainable by traditional single blocks, while this embodiment achieves synchronous limiting in two directions through reasonable constraints.

[0030] More importantly, the limiting component 130 extends partially opposite the bottom wall 110 to restrict the tactile switch 200 in the first direction Z, preventing the installed tactile switch 200 from shifting in the first direction Z. This design specifically solves the problem of the tactile switch 200 easily lifting on the non-locking side in traditional fixing methods.

[0031] In related technologies, relying solely on the locking force of the connecting component 140, the side of the tactile switch 200 away from the connecting component 140 lacks vertical constraint, making it prone to tilting upwards under vibration or pressure, leading to poor contact or functional failure. However, the structure formed by the extension of the limiting component 130, opposite to the bottom wall 110, can form a mechanical stop from the top of the tactile switch 200, creating a clamping effect with the locking force of the connecting component 140. This stably restricts the tactile switch 200 to a preset position in the first direction Z, maintaining its vertical position stability even under harsh environments such as vehicle vibration, ensuring long-term reliable operation.

[0032] In summary, the fixing structure 100 for the tactile switch 200 provided in this application embodiment is based on the bottom wall 110 for support. A side wall 120 and a limiting component 130 are provided on the same side of the bottom wall 110. Together with the bottom wall 110, they enclose a receiving space 150 for accommodating the tactile switch 200. The connecting component 140 connects the tactile switch 200 to the bottom wall 110 in the first direction Z perpendicular to the bottom wall 110. At the same time, the limiting component 130, on the one hand, works with the side wall 120 to constrain the movement of the tactile switch 200 in the first plane parallel to the bottom wall 110. On the other hand, it extends to form a structure opposite to the bottom wall 110, which, together with the bottom wall 110, restricts the movement of the tactile switch 200 in the first direction Z, thus constructing a three-dimensional limiting system for the tactile switch 200. The aforementioned fixing structure 100 effectively solves the problems of tactile switches easily sliding in the horizontal direction and the non-locking side easily tilting in the vertical direction in traditional fixing methods, ensuring that the tactile switch 200 maintains long-term positional stability and reliable function under harsh environments such as vehicle vibration and high and low temperature cycles.

[0033] For the specific implementation of the limit component, see [link to relevant documentation] in some embodiments. Figure 3 The limiting component 130 may include a support part 132 and an abutment part 134, which are connected to the bottom wall 110 by an integral molding process, which not only ensures the overall rigidity of the structure, but also avoids the deviation in limiting accuracy caused by assembly gaps.

[0034] The support portion 132 extends from the bottom wall 110 along the first direction Z, and its extension height is adapted to the height of the tactile switch 200. This ensures that the end of the support portion 132 away from the bottom wall 110 is aligned with the top of the tactile switch 200, providing a stable mounting base for the abutment portion 134, while avoiding insufficient height causing the abutment portion 134 to fail to cover the top of the tactile switch 200, or excessive height causing wasted space. The support portion 132 can cooperate with the side wall 120 to form a lateral constraint on the tactile switch 200 in the first plane, i.e., in the second direction X and the third direction Y. Therefore, its structural design must take into account both limiting accuracy and space optimization. For example, a thin-rib structure can be used. This thin-rib structure can reduce material usage and achieve lightweighting, while providing reliable lateral support through its own rigidity, avoiding limiting failure due to deformation.

[0035] The abutment 134 is located at the end of the support 132 away from the bottom wall 110, and the abutment 134 protrudes toward the center of the receiving space 150. The protrusion length needs to be precisely designed: it must be able to cover part of the top area of ​​the tactile switch 200 to form an effective vertical stop, but it should not protrude excessively to block the pressing area of ​​the tactile switch 200 and affect the user's operation.

[0036] like Figure 3 As shown, the abutment part 134 can be designed as a boss structure, and its overall shape is like a "hook" hanging above the tactile switch 200, forming an upper and lower opposite layout with the bottom wall 110, laying the structural foundation for subsequently restricting the displacement of the tactile switch 200 in the first direction Z.

[0037] Furthermore, the abutment portion 134 has a limiting surface 134A opposite to the bottom wall 110, which must remain parallel to the bearing surface 110A of the bottom wall 110. This ensures that after the tactile switch 200 is installed in the receiving space 150, the limiting surface 134A can make uniform contact with or maintain a small gap with the surface 200A of the tactile switch 200 that is away from the bottom wall 110, avoiding local stress concentration caused by surface tilt, which could damage the housing of the tactile switch 200 or affect the limiting effect. When the tactile switch 200 is placed in the receiving space 150, the limiting surface 134A can directly abut with the surface 200A or maintain a very small gap to ensure that the tactile switch 200 has no space to tilt, thereby effectively limiting the tactile switch 200 from leaving the receiving space 150 along the first direction Z. This design, together with the locking force of the connecting component 140, creates an upper and lower clamping effect. The connecting component 140 presses the tactile switch 200 downward against the bottom wall 110, while the limiting surface 134A prevents the tactile switch 200 from tilting upward. Even under strong vibration or impact in the vehicle environment, the tactile switch 200 can be prevented from shifting in the vertical direction, solving the problem of the non-locking side easily tilting in traditional fixing methods.

[0038] The support portion 132 also has a lateral abutment surface 132A for limiting the movement of the tactile switch 200 within the first plane. This lateral abutment surface 132A is located on the side of the support portion 132 facing the receiving space 150, and its surface is finely polished to reduce friction with the side of the tactile switch 200, preventing scratches on the tactile switch 200 housing during assembly, and ensuring precise fit. In practical applications, the lateral abutment surface 132A maintains a tight fit or a small gap with the side of the tactile switch 200. Combined with the stopping effect of the side wall 120, this completely constrains the range of motion of the tactile switch 200 within the first plane. Even under the inertial force caused by vibration, lateral slippage of the tactile switch 200 is prevented, ensuring that its pins remain precisely aligned with the internal circuitry of the HUD.

[0039] Furthermore, a guide slope 134B is formed on the side of the abutment portion 134 facing the receiving space 150. This guide slope 134B extends obliquely from the free end of the abutment portion 134 toward the support portion 132. The oblique direction of this guide slope 134B is adapted to the assembly direction of the tactile switch 200 to resolve the contradiction between the abutment portion 134's stopping function and assembly convenience. Since the abutment portion 134 protrudes toward the center of the receiving space 150, if the tactile switch 200 is assembled directly perpendicularly, the abutment portion 134 will form an obstruction, requiring forced pressing to insert it, which may damage the tactile switch 200 or the abutment portion 134. However, by providing the guide slope 134B, the pressing force of the tactile switch 200 along the first direction Z can be converted into a lateral force that slightly deforms the support portion 132. During assembly, the top of the tactile switch 200 first contacts the guide ramp 134B. As it slides along the ramp, it naturally pushes the support part 132 to open slightly outward. After the tactile switch 200 is fully inserted into the receiving space 150, the support part 132 returns to its original position due to its own elasticity, and the limiting surface 134A of the abutment part 134 automatically aligns with the top of the tactile switch 200. This design not only achieves the "self-aligning" rapid sliding of the tactile switch 200, greatly improving assembly efficiency, but also avoids structural damage caused by forced assembly. At the same time, it is compatible with the vertical limiting function of the abutment part 134, further improving the practicality of the limiting component 130.

[0040] Overall, the composite limiting unit composed of the support part 132 and the abutment part 134, through the coordinated design of the lateral abutment surface 132A (horizontal limiting) of the support part 132, the limiting surface 134A (vertical limiting) of the abutment part 134, and the guide slope 134B (assembly guidance), not only refines the specific implementation path of the limiting component 130, but also further enhances the limiting stability and assembly convenience of the fixed structure 100 through the cooperation of various subdivided features. This design is particularly suitable for vehicle-mounted devices such as HUDs: In the horizontal direction, the cooperation between the lateral contact surface 132A and the side wall 120 prevents the lateral slippage of the tactile switch 200, avoiding poor circuit contact caused by switch displacement; in the vertical direction, the cooperation between the limiting surface 134A and the bottom wall 110 prevents the tactile switch 200 from tilting, avoiding abnormal noise or image jitter caused by vibration; in the assembly process, the guide slope 134B reduces the assembly difficulty of automated production lines, providing convenience for mass production, and fully demonstrating the advantages of this technical solution in terms of reliability, practicality and production adaptability.

[0041] The connecting component 140 is configured to provide an active locking force to the tactile switch 200 in the first direction Z, ensuring that it fits tightly against the bottom wall 110 and providing a basic fit for the vertical limiting of the limiting component 130.

[0042] Specifically, see Figure 3 and Figure 4The connecting component 140 may include a mounting hole 141 formed on the bottom wall 110, which must be precisely aligned with a pre-set mounting hole on the tactile switch 200. The coaxiality error between the two must be controlled within a very small range to avoid jamming during fastener 300 assembly or causing the tactile switch 200 to shift. The mounting hole 141 is typically designed as a threaded hole to accommodate common fasteners 300, such as Phillips head pan head screws. The advantages of choosing screws as fasteners are: firstly, threaded connections have reliable self-locking performance, are not easily loosened in vehicle vibration environments, and ensure long-term locking effect; secondly, their detachable nature facilitates the later maintenance or replacement of the tactile switch 200 without damaging the fixing structure 100.

[0043] During assembly, the fastener 300 passes through the mounting hole of the tactile switch 200 and engages with the mounting hole 141. A tightening action applies a downward locking force along the first direction Z to the tactile switch 200. This locking force not only secures the tactile switch 200 to the bottom wall 110 but also ensures that the bottom of the tactile switch 200 fully conforms to the bearing surface 110A of the bottom wall 110, eliminating any gaps between them. This prevents the tactile switch 200 from making abnormal noises during vibration due to gaps, or from uneven stress caused by partial suspension, thus affecting its lifespan. Compared to related technologies that rely on non-mechanical fixing methods such as double-sided adhesive, this locking structure, which engages with the fastener 300 through the mounting hole 141, provides a more stable fixing force and is suitable for harsh environments such as high and low temperature cycling, preventing fixing failure due to adhesive aging.

[0044] To further enhance the limiting effect, the mounting hole 141 is located between the side wall 120 and the limiting component 130, and is closer to the side wall 120 than the limiting component 130. This positional design is not arbitrary, but based on considerations of force transmission and constraint coordination. When the fastener 300 is tightened, the locking force is transmitted along the bottom wall 110 to the side wall 120, pushing one side of the tactile switch 200 to fit tightly against the stop surface of the side wall 120—forming an active contact constraint relationship with the side wall 120, rather than a passive gap fit. This enhances the limiting accuracy of the tactile switch 200 in the first plane, such as the third direction Y, and prevents the tactile switch 200 from shifting away from the side wall 120 during the locking process.

[0045] Furthermore, the placement of the mounting hole 141 near the side wall 120 allows it to achieve a balance of opposing forces with the limiting component 130. One side of the side wall 120 forms an active constraint point through locking force, while the other side of the limiting component 130 forms a passive stop point through the lateral contact surface 132A. Both of these elements clamp the tactile switch 200 within the first plane. Together with the locking force of the connecting component 140 in the first direction Z and the stop force of the limiting component 130 in the first direction Z, they form a three-point support system: the locking constraint point on the side wall 120, and the horizontal and vertical stop points on the limiting component 130. These three points are evenly distributed around the tactile switch 200, firmly locking it within three-dimensional space. Even under strong vibrations, this effectively prevents the tactile switch 200 from shifting or shaking.

[0046] See Figure 5 To ensure the installation accuracy of the fixing structure 100 on the carrier, such as the housing 400A of the HUD, the fixing structure 100 also includes a positioning component. This positioning component is specifically a positioning post 160 disposed on the bottom wall 110 and protruding in a direction away from the receiving space 150. The positioning post 160 is designed, for example, as a cylindrical structure, and its dimensions must precisely match the pre-set positioning holes on the carrier, such as the positioning holes 401 of the housing 400A of the HUD, to achieve the effect of "insertion and positioning".

[0047] The core function of the positioning post 160 is to provide an installation reference for the fixed structure 100. When assembling the fixed structure 100 onto the carrier, the operator only needs to insert the positioning post 160 into the positioning hole of the carrier to quickly determine the installation position of the fixed structure 100 without repeated adjustments—significantly simplifying the assembly process and improving production efficiency. More importantly, the positioning post 160 ensures the relative positional accuracy between the fixed structure 100 and the carrier. In addition, the positioning post 160 can also assist the fixed structure 100 in resisting lateral forces when the carrier is subjected to vibration, reducing the risk of displacement of the fixed structure 100 itself and further improving the overall assembly stability.

[0048] See Figure 3 and Figure 4 The bottom wall 110 is also provided with a recess 170, which is recessed from the bottom wall 110 in a direction away from the receiving space 150. Its shape, position and size must be precisely matched with the protruding part 200B of the tactile switch 200 (such as the bottom pin, positioning protrusion or foolproof key).

[0049] The recessed portion 170 ensures a smooth fit for the tactile switch 200. If the bottom wall 110 were completely flat, the protruding portion 200B would support the tactile switch 200, creating a gap between its main body and the bottom wall 110. This would cause the tactile switch 200 to tilt during pressing or vibration, affecting the consistency of the pressing feedback. However, with the recessed portion 170 accommodating the protruding portion 200B, the bottom of the tactile switch 200's main body can fully conform to the bearing surface 110A, resulting in even force distribution and improved pressing life. Furthermore, because the recessed portion 170 and the protruding portion 200B are shaped together, the tactile switch 200 can only be smoothly installed into the receiving space 150 when the protruding portion 200B is aligned with the recessed portion 170. This prevents operators from installing the tactile switch 200 backwards, reducing the assembly defect rate.

[0050] The bottom wall 110 and the limiting component 130 can be manufactured using a one-piece injection molding process, a process choice that is highly compatible with the functional requirements of the fixed structure 100. One-piece injection molding means that the bottom wall 110 and the limiting component 130 do not require subsequent assembly; they are directly formed in one piece using a single mold, fundamentally eliminating the gaps that may occur during separate assembly. In related technologies, if the bottom wall and the limiting component are connected using screws or clips, gaps are prone to appear after long-term vibration, leading to a decrease in limiting accuracy. However, the one-piece molded structure has no assembly gaps, significantly improving overall rigidity and better resisting vibrations and impacts in the vehicle environment, preventing the limiting component 130 from deforming or shifting due to gaps.

[0051] Furthermore, one-piece injection molding ensures the relative positional accuracy between the bottom wall 110 and the limiting component 130. For example, key dimensions such as the height of the support 132, the protruding length of the abutment 134, and the angle of the lateral abutment surface 132A are all precisely controlled by the mold with minimal error, ensuring that the limiting component 130 can accurately match the tactile switch 200 and preventing limiting failure due to dimensional deviations. Moreover, one-piece molding can improve production efficiency, reduce the number of separate assembly processes, lower labor costs, and better utilize the material properties of engineering plastics (such as PC+GF20). The mechanical properties of the material can be uniformly transmitted in the one-piece structure, preventing the separate connection points from becoming weak points under stress, and further extending the service life of the fixed structure 100.

[0052] In summary, the connecting component 140 provides active locking force through the cooperation of the mounting hole 141 and the fastener 300. The optimized position of the mounting hole 141 enhances the cooperative limiting with the side wall 120. The positioning post 160 of the positioning component ensures the installation accuracy of the fixing structure 100. The recessed part 170 enables the smooth fit and foolproof assembly of the tactile switch 200. The one-piece injection molding ensures the overall rigidity and dimensional accuracy of the structure. These settings, together with the previous bottom wall 110, side wall 120, and limiting component 130, jointly construct a fixing system that is fully adapted to the stringent usage requirements of vehicle-mounted devices such as HUDs.

[0053] See Figure 5 and Figure 6 This application further provides a tactile switch assembly 10. The tactile switch assembly includes a tactile switch 200 and a fixing structure 100. Specific structural features of the fixing structure 100, such as the bottom wall 110, side wall 120, limiting component 130, and connecting component 140, have been described in detail in the preceding embodiments. It provides stable support for the tactile switch 200 through a three-dimensional constraint system combining horizontal closure and vertical clamping. During assembly, the tactile switch 200 is precisely housed within the receiving space 150 of the fixing structure 100. The connecting component 140 provides active locking force in the first direction Z, while the limiting component 130 cooperatively restricts the sliding of the tactile switch 200 in the first plane and its tilting in the first direction Z. Together, they reliably fix the tactile switch 200, ensuring the overall structural stability of the assembly.

[0054] As an independent modular unit, the tactile switch assembly 10 possesses versatility and adaptability. On one hand, the accommodating space 150 of the fixed structure 100 can be flexibly adjusted according to the external dimensions of different models of tactile switches 200, without modifying the core limit logic, thus adapting to various specifications of tactile switches. On the other hand, the modular design allows the assembly to be directly applied to various electronic devices such as HUDs and in-vehicle central control systems, facilitating product platform development—R&D personnel do not need to redesign the fixed structure for different devices; they only need to integrate the assembly into the target device to quickly assemble the tactile switch, significantly shortening the product development cycle.

[0055] See Figure 5 and Figure 6This application also provides a head-up display (HUD) 400, which integrates the aforementioned tactile switch assembly 10. The tactile switch assembly 10 serves as a core component for human-machine interaction, enabling functional control of the HUD 400, such as switching display modes, adjusting display brightness, and turning driver assistance information display on / off. Considering that the HUD 400 is installed in the vehicle's cockpit and must withstand long-term engine vibration, road bumps, and high / low temperature cycles, the fixing structure 100 of the tactile switch assembly 10, with its three-dimensional limiting system, ensures that the tactile switch 200 remains stable in the harsh in-vehicle environment, preventing poor contact or operational failure due to vibration and ensuring the reliability of user interaction during driving.

[0056] Regarding the assembly relationship between the tactile switch assembly 10 and the head-up display device 400, two flexible fixing methods can be adopted to adapt to different product design requirements.

[0057] In the first form, such as Figure 5 and Figure 6 As shown, the fixing structure 100 of the tactile switch assembly 10 is detachably connected to the housing 400A of the head-up display device 400 via the connecting assembly 140. Specifically, the mounting holes 141 on the bottom wall 110 of the fixing structure 100 can be aligned with the pre-set mounting holes of the housing 400A and locked in place by fasteners 300 (such as screws or bolts). Other detachable connection methods, such as snap-fit ​​or plug-in structures, can also be used to ensure a reliable connection between the fixing structure 100 and the housing 400A. The core advantage of this design lies in its extremely high maintainability and flexibility. When the tactile switch 200 malfunctions or the mounting structure 100 is partially damaged, the operator does not need to disassemble the entire head-up display device 400. They only need to remove the fasteners 300 or unlock the clips to remove the tactile switch assembly 10 as a whole and replace the tactile switch 200 or the mounting structure 100 separately. This eliminates the need to scrap the expensive housing 400A, significantly reducing maintenance costs and time. At the same time, the detachable design also supports future upgrades to the tactile switch assembly 10, such as replacing it with a more sensitive tactile switch 200, thereby increasing the product's life cycle value.

[0058] In the second form, see Figure 7The fixing structure 100 of the tactile switch assembly 10 is integrally formed into the housing 400A of the head-up display device 400. Specifically, the core structures of the fixing structure 100, such as the bottom wall 110, side wall 120, and limiting component 130, are integrally injection molded with the housing 400A of the head-up display device 400 using the same mold, completing the integration of the fixing structure 100 and the housing 400A without additional assembly processes. The core advantage of this integrated design lies in maximizing structural rigidity and positional accuracy. The integral molding eliminates the assembly gap between the fixing structure 100 and the housing 400A, significantly improving the overall structural rigidity and better resisting vehicle vibration and impact, thus preventing the tactile switch 200 from shifting due to gaps. Moreover, mold forming can precisely control the relative positions of each component of the fixing structure 100, ensuring that the accommodating space 150 is accurately aligned with other components in the head-up display device 400, such as the reflector, thereby improving assembly yield. In addition, the integrated design reduces the number of parts in the independent fixed structure by 100, saves assembly time, and helps to reduce the overall production cost of the product.

[0059] The two fixing methods described above demonstrate the design flexibility of this solution, allowing for flexible selection based on the actual needs of the product: if the product prioritizes ease of maintenance and upgrade potential, such as head-up displays in mid-to-high-end vehicles, a detachable fixing method can be used; if the product prioritizes cost optimization, structural rigidity, and assembly efficiency, such as standardized head-up displays in economy vehicles, an integrated fixing method can be used. Both methods fully leverage the limiting advantage of the tactile switch assembly 10, ensuring the long-term reliable operation of the head-up display device 400 in an automotive environment.

[0060] It should be noted that the technical solutions described in this application can be combined arbitrarily without conflict.

[0061] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fixing structure for a tactile switch, characterized in that, The fixing structure includes: bottom wall; A sidewall and a limiting assembly disposed on the same side of the bottom wall, the limiting assembly, the sidewall, and the bottom wall defining a receiving space for accommodating a tactile switch; and A connecting component for connecting the tactile switch to the bottom wall in a first direction. The limiting component is configured to cooperate with the sidewall to restrict the displacement of the tactile switch within the first plane, and The limiting component extends partially opposite the bottom wall to cooperate with the bottom wall to limit the displacement of the tactile switch in the first direction, wherein the first direction is perpendicular to the first plane.

2. The fixing structure for a tactile switch according to claim 1, characterized in that, The limiting component includes a support portion and an abutment portion. The support portion extends from the bottom wall along the first direction, and the abutment portion is disposed at the end of the support portion away from the bottom wall, and the abutment portion protrudes toward the center of the receiving space.

3. The fixing structure for a tactile switch according to claim 2, characterized in that, The abutting portion has a limiting surface opposite to the bottom wall, the limiting surface being configured to abut against the surface of the tactile switch away from the bottom wall, thereby restricting the tactile switch from disengaging from the receiving space along the first direction.

4. The fixing structure for a tactile switch according to claim 2, characterized in that, The support portion is provided with a lateral abutment surface for restricting the movement of the tactile switch within a first plane.

5. The fixing structure for a tactile switch according to claim 2, characterized in that, A guide slope is formed on the side of the abutment portion facing the receiving space. The guide slope extends obliquely from the free end of the abutment portion toward the support portion. The guide slope is used to guide the tactile switch to slide into the receiving space when the tactile switch is installed.

6. The fixing structure for a tactile switch according to claim 1, characterized in that, The connecting component includes a mounting hole formed on the bottom wall for engaging with a fastener to lock the tactile switch to the bottom wall.

7. The fixing structure for a tactile switch according to claim 6, characterized in that, The sidewall is configured to be opposite to the limiting component, and the mounting hole is located between the sidewall and the limiting component, and is configured to be closer to the sidewall than the limiting component.

8. The fixing structure for a tactile switch according to claim 1, characterized in that, The fixing structure further includes a positioning component, which includes a positioning post disposed on the bottom wall and protruding in a direction away from the receiving space, the positioning post being used to position the fixing structure.

9. The fixing structure for a tactile switch according to claim 1, characterized in that, The bottom wall is also provided with a recessed portion, which is recessed from the bottom wall away from the receiving space to accommodate the protruding part of the tactile switch.

10. The fixing structure for a tactile switch according to claim 1, characterized in that, The bottom wall and the limiting component are integrally injection molded parts.

11. A tactile switch assembly, characterized in that, include: Touch switch; as well as The fixing structure according to any one of claims 1 to 10, The tactile switch is housed within the receiving space of the fixed structure, and the connecting component and the limiting component are used together to fix the tactile switch.

12. A head-up display device, characterized in that, Including the tactile switch assembly according to claim 11, The tactile switch assembly is detachably connected to the housing of the head-up display device via a connecting component, or... The mounting structure of the tactile switch assembly is integrally formed into the housing of the head-up display device.

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