Motorcycle Rear Lighting Assembly for Short-Tail Visibility
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Solution Overview
Problem
The stylistic changes in two-wheeled vehicles, such as moving the saddle forward and shortening the tail, cause rear lights to sink into side bags, reducing visibility and requiring model-specific molds, leading to legal compliance issues and light interference.
Innovation Solution
A rear lighting assembly with independent, separate light-signaling devices connected to a protruding support, featuring LEDs arranged in a cantilevered manner with distinct distances and orientations to minimize interference and ensure legal visibility angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the saddle is moved forward and the tail is shortened for stylistic purposes, then the motorcycle design is improved, but the rear light sinks into the side bags causing reduced visibility and legal compliance issues
Solution Approach 1:
The rear lighting assembly is divided into separate, modular light sources that can be independently positioned. Each light source is housed in its own protective casing with specific geometric shapes (cylindrical, conical, or truncated conical) that allow them to protrude from the motorcycle body, ensuring visibility while maintaining the shortened tail design.
Solution Approach 2:
The light sources are positioned in three-dimensional space to protrude from the motorcycle body at specific distances (5-15 cm from the longitudinal plane). This spatial arrangement ensures that lights remain visible from the required 80° angle on each side while accommodating the shortened tail stylistic requirements.
2Illumination intensity
If the rear light is made in different shapes and sizes for each motorcycle model to suit the lines and solve visibility problems, then visibility and design compatibility are improved, but considerable investment in molds is required
Solution Approach 1:
The patent provides a universal rear lighting assembly that can be adapted to different motorcycle models through adjustable mounting parameters. The assembly includes standardized components (protective casings, light sources, mounting brackets) that can be configured in various arrangements to suit different motorcycle geometries without requiring model-specific molds, reducing manufacturing investment while maintaining visibility requirements.
3Illumination intensity
If the rear lights are made independent and separate from the motorcycle body, then visibility and design flexibility are improved, but the device complexity increases
Solution Approach 1:
The lighting assembly is segmented into independent functional modules (light sources, protective casings, mounting mechanisms) that can be separately manufactured and assembled. This modular approach maintains visibility requirements while managing complexity through standardized interfaces and components.
Solution Approach 2:
The protective casings for the light sources are designed as flexible or adaptable structures (cylindrical, conical, or truncated conical shapes) that can be mounted in various positions and orientations. These casings protect the light sources while allowing the assembly to adapt to different motorcycle geometries without requiring complex custom-fitted structures for each model.
Data Source
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Figure 3a~3f
AI summary
A rear lighting assembly for a two- or three-wheeled vehicle comprising a pair of light-signaling devices connected to a protruding support connectible to the vehicle, such that said light-signaling devices protrude from the left and right sides of said protruding support, and in which the LEDs configured to signal a change in the direction of the vehicle have an average distance from the vertical centerline plane of the vehicle greater than the LEDs configured to signal the vehicle braking and/or to provide the rear position light of the vehicle.