Straddled Vehicle Front Cover Lighting Layout
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Solution Overview
Problem
Straddled vehicles face a challenge in reducing the size of the front part while maintaining conspicuousness, as a compact front cover limits the length of position lamps, making it difficult to improve their visibility.
Innovation Solution
The design features a front cover with a flat, parallel surface extending forward of the head pipe, where the headlamp has a larger light emission surface and position lamps have larger emission surfaces extending in the top-and-bottom direction, ensuring visibility from various angles without rotating during turns, and using light guides to maintain compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the front cover size is reduced in the front-and-rear direction to improve handle operating feeling, then the size of the front part is reduced, but the length of position lamps is limited making it difficult to improve conspicuousness
Solution Approach 1:
The position lamps are configured to extend primarily in the left-and-right direction rather than the front-and-rear direction. This dimensional shift allows the lamps to achieve sufficient length for conspicuousness while maintaining a compact front cover in the front-and-rear direction, thus improving handle operating feeling without sacrificing visibility.
Solution Approach 2:
The front cover is designed with an asymmetric configuration where the position lamps are arranged to extend in the left-and-right direction with specific spacing from the headlamp. This asymmetric layout optimizes the use of available space, allowing the position lamps to be sufficiently long for conspicuousness while keeping the overall front cover size reduced.
2Illumination intensity
If the position lamps extend in the front-and-rear direction to improve conspicuousness, then visibility is improved, but the size of the front cover in the front-and-rear direction increases
Solution Approach 1:
Instead of extending position lamps in the front-and-rear direction, the invention redirects their extension to the left-and-right direction. This dimensional change allows the lamps to achieve the necessary length for conspicuousness without increasing the front cover's front-and-rear size.
Solution Approach 2:
The front cover is designed with differentiated regional functions: the central area houses the headlamp while the lateral areas accommodate position lamps extending in the left-and-right direction. This local differentiation allows optimal arrangement of lighting components to achieve conspicuousness without overall size increase.
3Illumination intensity
If the front cover has a pointed forward shape to allow position lamps to extend horizontally, then conspicuousness is improved, but the size of the front part increases
Solution Approach 1:
The position lamps are configured to extend in the left-and-right direction rather than requiring a pointed forward shape. This dimensional reorientation allows the lamps to achieve sufficient horizontal extension for conspicuousness while maintaining a more compact overall front cover volume.
Solution Approach 2:
The invention changes the spatial parameters of the position lamp arrangement by specifying their extension direction (left-and-right) and spacing from the headlamp. This parameter optimization allows the lamps to be sufficiently long for conspicuousness while keeping the front cover compact in all dimensions.
Data Source
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AI summary
A front edge of a front surface portion 31 of a front cover 30 in a side view of a vehicle extends along a virtual line that is in parallel with a central axis of a head pipe in the side view of the vehicle. Light emission surfaces 51a, 51b of position lamps 50a, 50b are provided at the front surface portion 31 and spaced apart from the light emission surface 41 in a front view of the vehicle. In the case where the front surface portion 31 is viewed in a direction that is inclined by 45 degrees with respect to a vertical plane extending in a vehicle front-and-rear direction, an apparent area of the light emission surface 41 is larger than an apparent area of each of left and right light emission surfaces 51a, 51b. In a left side view of the vehicle, an apparent area of the left light emission surface 51a is larger than an apparent area of the light emission surface 41. In a right side view of the vehicle, an apparent area of the right light emission surface 51b is larger than an apparent area of the light emission surface 41.