Head-Up Display Cover Retention Structure to Prevent Lifting
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Solution Overview
Problem
Existing head-up displays face issues with cover deformation and lifting, leading to dust entry and increased costs due to separate attachment methods, which affect installation and appearance.
Innovation Solution
A head-up display design featuring a plate-shaped cover supported by a housing with curved extensions and claw parts, using engagement portions and protrusions to securely hold the cover without additional adhesives, inhibiting lifting and size increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate attachment method (such as adhesives or fasteners) is used to attach the cover, then the cover can be securely fixed, but the device complexity and manufacturing cost increase
Solution Approach 1:
The attachment function is merged into the housing structure itself through the claw parts that extend into the cover's engagement portions. This eliminates the need for separate adhesives or fasteners, reducing device complexity while maintaining secure attachment. The claw parts are integrated into the housing's wall structure, creating a unified attachment system.
Solution Approach 2:
The housing structure provides its own attachment mechanism through the claw parts that automatically engage with the cover's engagement portions during assembly. The presser portions of the claw parts provide self-aligning and self-latching functionality, eliminating the need for external attachment components or complex assembly procedures.
2Stability of the object's composition
If the wall extensions are made straight, then the structure is simpler, but the cover may deform or lift under stress
Solution Approach 1:
The first extensions are curved toward the image-generating device rather than being straight, providing a smoother contour that better conforms to the cover's shape. This curvature distributes stress more evenly across the cover surface, preventing deformation and lifting while maintaining structural integrity. The curved profile also improves aesthetic appearance.
3Reliability
If multiple separate components are used for attachment, then the attachment security is improved, but the manufacturing cost increases
Solution Approach 1:
The attachment functionality is combined into the housing structure itself through integrally-formed claw parts, eliminating the need for separate fasteners, adhesives, or other attachment components. This reduces the number of parts, simplifies manufacturing, and lowers costs while maintaining secure attachment through the engagement between claw parts and cover portions.
4Stability of the object's composition
If the cover is held in a flat state, then the structure is simpler, but the cover may lift or deform under operational conditions
Solution Approach 1:
The curved first extensions conform to the cover's shape and provide distributed support across the cover surface. This curved support structure prevents the cover from lifting or deforming under operational stress while maintaining a compact and aesthetically pleasing housing profile. The curvature allows the housing to better accommodate the cover's natural shape.
Data Source
AI summary
A head-up display includes: a second housing including a wall; and a plate-shaped cover supported by a placement surface of the housing (second housing) and covering a second opening of the housing. The wall includes: a pair of first extensions extending in the X-axis direction; a pair of second extensions extending in the Y-axis direction; and a plurality of claw parts disposed along the wall. The cover includes a plurality of first engagement portions formed corresponding to the plurality of claw parts. The plurality of claw parts include pressers protruding from the wall toward the second opening. The second housing holds the cover in a curved state by surrounding the cover with the pair of first extensions and the pair of second extensions and sandwiching the cover between the placing surface and the pressers engaged with the plurality of first engagement portions.