Vehicular Light Guide Holding Structure Gap Control
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Solution Overview
Problem
Conventional vehicular illumination structures experience anomalous light emission due to contact between the light guide and support bodies, leading to non-homogeneous light distribution in vehicle compartments.
Innovation Solution
A vehicular illumination holding structure featuring a bar-shaped light guide with a transmitting portion and support members that maintain a gap between the light guide's emission surface and the support, using engagement bodies and support portions to stabilize the light guide without direct contact, thereby preventing anomalous light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light guide is covered by a housing or supported by rib portions extending along the entire width, then the light guide is protected and held in place, but heterogeneous light emission and anomalous light occur at contact portions
Solution Approach 1:
The support structure is segmented into discrete support portions rather than continuous rib portions extending along the entire width. The holding members have engagement bodies that contact only specific localized portions of the light guide, dividing the contact area into separate segments that avoid covering the emission surface.
Solution Approach 2:
The support and holding functions are applied locally at specific positions rather than uniformly across the entire light guide. Engagement bodies contact only side surfaces at predetermined locations, while support portions are positioned to avoid the emission surface, creating localized support zones that preserve light emission quality.
2Stability of the object's composition
If rib portions extend along the entire width of the light guide, then the light guide is stably supported, but contact area causes anomalous light emission
Solution Approach 1:
The continuous support structure is divided into discrete support portions positioned at specific locations. Instead of rib portions extending along the entire width, multiple separate support portions are arranged to provide stability while minimizing contact area with the emission surface.
Solution Approach 2:
The support function is transitioned from a two-dimensional continuous rib structure to a series of discrete three-dimensional support portions with specific spatial positioning. This dimensional change allows precise control over contact locations to avoid the emission surface while maintaining support stability.
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 ensures homogeneous light emission by preventing contact between the light guide and support members, enhancing the design quality and operability of vehicle interiors while reducing anomalous light occurrences.
Implementation Method 1
a bar-shaped light guide that is installed in an interior trim... an emission surface of the light guide extends along longitudinal (lengthwise) direction of the light guide and faces the transmitting portion of the interior trim
Implementation Method 2
the transmitting portion is disposed with a gap (interstices) from the emission surface of the light-guide
Data Source
AI summary
A vehicular illumination holding structure comprising: a bar-shaped light guide installed in an interior trim; a holding member that holds the light guide; and a transmitting portion of the interior trim, wherein an emission surface of the light guide extends along longitudinal direction thereof and faces the transmitting portion, the transmitting portion is disposed with a gap from the emission surface, the holding member extends from the interior trim, the holding members have, at leading end portions thereof, engagement bodies engaged with a first longitudinal side surface of the light guide, the interior trim further includes support portions and step portions, where the support portions extend over a second side surface of the light guide to reach the emission surface, the second side surface being a surface opposed to the first side surface, and the step portions connect the support portions and the transmitting portion.