Straddle Vehicle Sub-Light Unit Optical Axis Adjustment
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Solution Overview
Problem
Existing straddle vehicles face challenges in accurately adjusting the optical axis of sub-head-lamp light sources without compromising mounting accuracy and external appearance, as the direction of the optical axis cannot be adjusted after the sub-head-lamp light source is mounted on the front cover.
Innovation Solution
A straddle vehicle design incorporating a sub-light-unit with a tiltable reflector and optical axis adjustment mechanism, allowing for independent adjustment of the optical axis without requiring clearance between the housing and the cover member, enhancing flexibility in external appearance design and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the sub-head-lamp light source is mounted on the front cover with fixed optical axis and reflector, then the mounting accuracy must be very high to obtain desired irradiation range, but this increases the difficulty of mounting and reduces flexibility
Solution Approach 1:
The reflector is made adjustable through an optical axis adjustment mechanism that allows it to be tilted relative to the housing. This dynamic adjustment capability enables the optical axis to be changed after mounting, eliminating the need for high mounting precision while maintaining desired irradiation range.
2Shape
If the housing is disposed without clearance between the housing and the edge of the cover member, then the external appearance is improved, but the optical axis cannot be adjusted after mounting
Solution Approach 1:
The lighting assembly is divided into separable components: the housing mounted on the cover member, and the adjustable reflector within the housing. This segmentation allows the housing to be fixed without clearance for good appearance, while the reflector can be independently adjusted via the optical axis adjustment mechanism.
3Ease of operation
If the operation section is disposed outside the cover member for easy operation, then the operation is easier, but the external appearance is compromised and the operation section is contaminated by external foreign matters
Solution Approach 1:
The operation section is placed inside the cover member, using the cover member itself as an intermediary structure that provides both protection from external contaminants and a clean appearance. The adjustment mechanism is transmitted through the housing structure, allowing operation without external exposure.
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
Enables precise optical axis adjustment without altering the housing's position, improving the external appearance and mounting accuracy while allowing for easy maintenance and operation.
Implementation Method 1
a reflector which is accommodated in the housing and reflects the light beam emitted from the light source member
Data Source
AI summary
A straddle vehicle comprises a cover member covering a vehicle body; a head lamp unit which is disposed at a front portion of the straddle vehicle and emits a light beam with which a forward region of the vehicle body is irradiated; and a sub-light-unit which is provided separately from the head lamp unit and emits the light beam with which the forward region is irradiated, wherein the sub-light-unit includes: a housing disposed along an edge of the cover member; a light source member which emits the light beam inside the housing; a reflector which is accommodated in the housing and reflects the light beam emitted from the light source member; and an optical axis adjustment mechanism which supports the reflector on the housing in such a manner that the reflector is tiltable with respect to the housing, and changes a posture of the reflector with respect to the housing.