Head-Up Display Reflective Mirror Mounting via Guide Grooves
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Solution Overview
Problem
The existing head-up display devices face challenges in mounting reflective plates with poor workability and low accuracy, making it difficult to achieve precise positioning and prevent displacement of the virtual image on the windshield.
Innovation Solution
The head-up display device incorporates a lower casing with guide grooves, positioning ribs, and a bezel with resilient portions to securely mount and position the reflective mirror, ensuring accurate alignment and fixing without the need for double-sided tapes, thereby enhancing mounting workability and positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If double-sided tape or similar adhesives are used to mount the reflective plate, then the mounting process is simple, but the mounting workability is poor and positioning accuracy is low
Solution Approach 1:
The patent introduces guide grooves as an intermediary structure between the reflective plate and the housing. These grooves provide a precise mechanical interface that guides the reflective plate into its correct position during assembly, eliminating the need for adhesive-based mounting while achieving both ease of assembly and high positioning accuracy.
Solution Approach 2:
The reflective plate is designed with engagement protrusions that automatically fit into the guide grooves of the housing during assembly. This self-aligning mechanism allows the reflective plate to position itself accurately without requiring external adhesives or complex mounting procedures, achieving both simplicity and precision.
2Device complexity
If the reflective plate is mounted using adhesives, then the structure is simple, but the mounting workability is poor
Solution Approach 1:
The guide grooves serve as a mechanical intermediary that facilitates easy mounting of the reflective plate. By providing a predefined path and positioning features, the grooves enable workers to quickly and accurately install the reflective plate without dealing with adhesive application, curing times, or alignment difficulties.
3Manufacturing precision
If the reflective plate is mounted with adhesives, then the initial positioning can be achieved, but displacement of the virtual image occurs
Solution Approach 1:
The guide grooves act as a stable mechanical intermediary that permanently secures the reflective plate in its correct position. This mechanical interface prevents any displacement that might occur with adhesive-based mounting, ensuring long-term stability of the virtual image position on the windshield.
Solution Approach 2:
The mounting system is segmented into discrete mechanical features: engagement protrusions on the reflective plate and corresponding guide grooves in the housing. This segmentation creates a precise, repeatable mechanical interface that maintains positioning accuracy and prevents displacement over time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for easy and accurate mounting of the reflective mirror, reducing displacement and improving the stability of the virtual image display on the windshield, resulting in improved mounting workability and positioning accuracy compared to traditional methods.
Implementation Method 1
a reflective mirror which is inserted and mounted to the lower casing toward a bottom surface of the lower casing... to reflect the display light emitted from the indicator and guide the reflected display light to a windshield of a vehicle
Data Source
AI summary
A head-up display device includes an indicator configured to emit a display light, a lower casing to which the indicator is mounted, an upper casing which is mounted to an upper portion of the lower casing, a pair of support portions which are provided on the lower casing and extend toward the upper casing, guide grooves which are formed on the support portions at opposite sides thereof, and a reflective mirror which is inserted and mounted to the lower casing toward a bottom surface of the lower casing while both lateral edges of the reflective mirror are engaged with the guide grooves, to reflect the display light emitted from the indicator and guide the reflected display light to a windshield of a vehicle.