Vehicular Lamp Fitting With Intermediate Optical Portion
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Solution Overview
Problem
Existing vehicular lamp fittings using multiple light sources and rod-shaped light guiding portions struggle to meet the single-lamp requirement of a 75 mm or less distance between light emitting surfaces, as specified by laws.
Innovation Solution
A vehicular lamp fitting configuration that includes a light guiding body with a first and second rod-shaped light guiding portion, an intermediate portion, and coupling portions to integrate the light from these portions, forming a light emitting surface that satisfies the single-lamp requirement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple rod-shaped light guiding portions are used to guide light from multiple light sources, then the lighting coverage and design flexibility are improved, but the distance between light emitting surfaces exceeds the single-lamp requirement of 75 mm or less
Solution Approach 1:
The patent merges multiple light guiding portions with different light sources into a single integrated lamp unit by introducing an intermediate portion that optically connects them. The intermediate portion receives light from multiple rod-shaped light guiding portions and transmits it through a single light emitting surface, effectively combining multiple lighting elements into one functional unit that satisfies the single-lamp requirement while maintaining design flexibility.
Solution Approach 2:
The intermediate portion serves as an optical intermediary between multiple light guiding portions and the external environment. It receives light from multiple sources, guides and transmits this light through its own light emitting surface, thereby mediating the optical paths and enabling multiple light sources to function as a single lamp unit with controlled emission distance.
2Adaptability or versatility
If multiple light sources and rod-shaped light guiding portions are arranged to meet design requirements, then the lighting functionality is improved, but the structural complexity increases
Solution Approach 1:
The patent combines multiple light guiding portions and light sources into a unified structural assembly. The intermediate portion acts as a common interface that integrates the optical outputs of multiple rod-shaped light guiding portions, reducing the need for separate mounting structures and simplifying the overall assembly process while maintaining enhanced lighting functionality.
Solution Approach 2:
The intermediate portion performs multiple functions: it serves as a structural support element, an optical guide for multiple light sources, and a unified light emitting surface. This multi-functionality reduces the number of separate components needed, thereby reducing structural complexity while maintaining versatile lighting capabilities.
3Reliability
If the distance between light emitting surfaces is reduced to meet the single-lamp requirement, then the legal compliance is improved, but the arrangement flexibility of light sources is restricted
Solution Approach 1:
The patent arranges light sources and light guiding portions in three-dimensional space, utilizing vertical and angular dimensions rather than only horizontal spacing. By orienting rod-shaped light guiding portions at different angles and positioning them in multiple layers, the design achieves compact emission distance compliance while preserving arrangement flexibility through spatial optimization.
Solution Approach 2:
The patent employs curved or angled arrangements of light guiding portions rather than strictly linear configurations. This allows light paths to be optimized within a compact footprint, enabling the light emitting surfaces to be positioned within 75 mm while maintaining flexible arrangement options for the internal light sources and guiding structures.
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
The proposed configuration effectively reduces the distance between light emitting surfaces to 75 mm or less, meeting legal requirements while allowing for reduced costs and design flexibility.
Implementation Method 1
a first rod-shaped light guiding portion which guides first light emitted by the first light source, a second rod-shaped light guiding portion which guides second light emitted by the second light source
Data Source
AI summary
A vehicular lamp fitting according to the present invention comprises: a light guiding body; a first light source; and a second light source, wherein the light guiding body includes a first rod-shaped light guiding portion which guides first light emitted by the first light source, a second rod-shaped light guiding portion which guides second light emitted by the second light source, an intermediate portion which is arranged between the first rod-shaped light guiding portion and the second rod-shaped light guiding portion, a first coupling portion which couples a base end portion side of the first rod-shaped light guiding portion and the intermediate portion together such that a part of the first light, which enters the first rod-shaped light guiding portion through a light entering surface of the first rod-shaped light guiding portion, enters an inside of the intermediate portion.