Head-Up Display Cover Mechanism for Reduced Compressor Time
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Solution Overview
Problem
Existing head-up display apparatuses face challenges in reducing the time required to raise the combiner, compromising design flexibility in the lower rear section and causing interference with other instruments due to complex cover mechanisms.
Innovation Solution
A head-up display apparatus with a casing featuring continuous first and second openings, where the first cover opens and closes the path for the combiner, and the second cover retracts into the space between the combiner and the light-projecting portion, allowing simultaneous movement and reducing interference, utilizing a motor and transmission mechanism for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If one cover rotates rearward to open the opening, then the opening can be opened, but the design flexibility of the lower rear section is reduced and interference with instruments occurs
Solution Approach 1:
The patent divides the single cover into two separate covers: a first cover for the first opening and a second cover for the second opening. This segmentation allows each cover to be independently designed and positioned, enabling both covers to rotate forward without interfering with the lower rear section, thus resolving the contradiction between opening operation and design flexibility
Solution Approach 2:
The patent extracts the second cover from the traditional single-cover design and positions it to cover the second opening separately. This extraction allows the second cover to rotate forward into the casing without requiring rearward rotation, eliminating interference with instruments while maintaining opening functionality
2Loss of time
If the combiner and cover move simultaneously, then the time to raise the combiner is reduced, but the mechanism complexity increases
Solution Approach 1:
The patent merges the cover opening operation with the combiner raising operation by coordinating their movements through the drive means. Both the first cover and second cover rotate forward simultaneously with the combiner, allowing the openings to be cleared and the combiner to project in one integrated motion sequence, reducing total time while maintaining manageable complexity through unified control
3Length of stationary object
If one cover slides under another while rotating forward, then the overall size is not increased, but the combiner cannot be raised until covers pass its path
Solution Approach 1:
By segmenting the cover system into two separate covers for two separate openings, the patent eliminates the need for one cover to slide under another. Each cover rotates forward independently through its own opening path, allowing the combiner to be raised simultaneously without waiting for covers to clear its path, thus reducing time loss while maintaining compact dimensions
Data Source
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AI summary
An HUD apparatus is structured such that a first cover opens and closes a first opening, which is disposed on a path along which a combiner moves, and a second cover opens and closes a second opening, which is disposed on an optical path from a light-projecting portion of a light-emitting unit (second mirror) to the combiner. When the combiner is being moved from an accommodated position to a projecting position, the second cover retracts into a space between the combiner and the light-projecting portion while rotating forward, similarly to the first cover.