Overlapping Cover Lids for Compact Head-Up Display Depth
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Solution Overview
Problem
Conventional head-up display devices in automobiles face challenges with increased depth dimension due to a single-piece cover mechanism, which obstructs other dashboard instruments and compromises visibility, and existing divided lid solutions protrude above the dashboard, interfering with driver vision.
Innovation Solution
A display device with multiple cover members that overlap and are driven by a single source, allowing for reduced depth dimension, smooth action, and enhanced merchantability by using a rotary body, travel bodies, and guide holes to manage the cover members' movement and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single-piece cover is used to cover the opening, then the opening can be fully covered, but the depth dimension of the device increases due to large sliding distance
Solution Approach 1:
The cover is divided into two separate lids instead of using a single-piece cover. Each lid can be independently positioned and stored, allowing them to overlap within a compact region adjacent to the opening rather than requiring a long sliding path, thus reducing the depth dimension while maintaining full coverage capability
Solution Approach 2:
The two lids are designed to overlap with each other when stored in the region adjacent to the opening. This nesting arrangement allows both lids to occupy a compact space within the device housing, significantly reducing the required depth dimension compared to a single-piece cover that would require a long sliding path
2Length of moving object
If divided lids are used to reduce depth dimension, then the depth dimension is reduced, but the lids protrude above the dashboard when opening
Solution Approach 1:
The lids are designed to move not only in the depth direction but also in the vertical direction. When opening, the lids travel along guide grooves that direct them upward and backward, allowing them to clear the opening without protruding above the dashboard front surface, thus solving the visibility problem while maintaining reduced depth dimension
3Ease of operation
If multiple cover members are used, then the load is spread for smooth action, but the structure becomes more complex
Solution Approach 1:
A single drive source is used to simultaneously drive both lids and the display portion. The drive source is mechanically coupled to the lids through guide grooves and rack-pinion mechanisms, allowing synchronized movement of multiple components without requiring separate motors or actuators for each lid, thus reducing structural complexity while maintaining smooth operation
Data Source
AI summary
A display device includes: a display portion; and a storage member configured to house the display portion and including an opening through which the display portion passes, wherein the display device further includes: a plurality of cover members configured to cover the opening and to travel from the opening to a region of the storage member adjacent to the opening so as to be overlapped with each other at the region; travel control means configured to cause the plurality of cover members to transfer to a covering position in which the opening is closed by the plurality of cover members, and also to a overlapping position in which the plurality of cover members are overlapped with each other, and configured to cause the display portion to transfer to rise-up and storage positions; and only one drive source configured to drive the travel control means.