Bicycle Mudguard Integrated Rear Light Curvature

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Solution Overview

Problem

Existing bicycle mudguards with integrated rear light devices often have aesthetic and functional drawbacks, including visible fastening means, limited visibility, and difficulty in power supply routing, which compromise both appearance and installation ease.

Innovation Solution

A bicycle mudguard design where the rear light device's housing is incorporated beneath the surface, with a translucent wall serving as the illumination surface that follows the mudguard's curvature, allowing for hidden fastening and improved visibility through a wide horizontal beam angle, and utilizing a sandwich structure for power supply connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the housing with light source is mounted on top of the mudguard surface, then the light source is easily accessible, but additional drill holes are required and the appearance is compromised

Engineering Contradiction:
Improvelight source installationVSAvoidmudguard appearance
Core Design Contradiction:
Ease of manufactureVSShape

Solution Approach 1:

Instead of mounting the housing on top of the mudguard surface, the invention inverts the approach by incorporating the housing into the mudguard body itself, with the light source positioned inside the mudguard and the illumination surface formed by the inner wall of the housing. This eliminates the need for drill holes while maintaining aesthetic appearance.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The housing is nested within the mudguard structure, with the housing walls forming part of the mudguard's internal architecture. The light source is positioned within the housing, and the illumination surface is formed by the housing's inner wall that faces the rear wheel, creating a nested configuration that integrates multiple components seamlessly.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Reliability

If the housing is detachably fitted to the underside of the mudguard, then the light source is protected, but the visibility to road users is insufficient

Engineering Contradiction:
Improvelight source protectionVSAvoidvisibility to road users
Core Design Contradiction:
ReliabilityVSIllumination intensity

Solution Approach 1:

The housing is designed with differentiated local qualities: the outer walls provide protection when positioned at the underside, while the inner wall facing the rear wheel is designed as an illumination surface with specific optical properties to maximize light emission and visibility. This local differentiation allows the same component to serve both protective and illuminative functions effectively.

Inventive Principle:
Principle #3Local quality

3Shape

If the illumination surface follows the mudguard curvature, then the aesthetic integration is improved, but the manufacturing complexity increases

Engineering Contradiction:
Improveaesthetic integrationVSAvoidhousing manufacturing
Core Design Contradiction:
ShapeVSDevice complexity

Solution Approach 1:

The housing's illumination surface is designed to follow the curvature of the mudguard, creating a smooth, curved interface that integrates aesthetically with the overall mudguard shape. This curvature is achieved through the housing's structural design, where the inner wall naturally conforms to the mudguard's external contour, eliminating the need for additional shaping operations.

Inventive Principle:
Principle #14Spheroidality (Curvature)

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 solution enhances the aesthetic integration of the mudguard and rear light, improves cyclist visibility to other road users, and simplifies installation by eliminating the need for visible fastening and drill holes, while ensuring reliable power supply and protection of electronic components.

Implementation Method 1

at least one light source is provided

Methodology Applied
Scientific EffectLight Emitting Diode: Light Emitting Diode

Data Source

PatentEP2907733B1Bicycle mudguard with integrated rear light device
Publication Date: 2021.08.25 CURANA INVEST
  • EP2907733B1 patent drawingFigure 1~2
  • EP2907733B1 patent drawingFigure 3~5
  • EP2907733B1 patent drawingFigure 6

AI summary

The present invention relates to a bicycle mudguard (1) with a rear light device which is incorporated therein, comprising a housing (2) which is accommodated in an opening in the mudguard and in which a light source (3) is provided, wherein the housing (2) comprises a translucent wall (5) which, in use, forms an illumination surface (8) which projects from the surface of the mudguard and follows the curvature of the mudguard (1). The rear light device is easy to install and ensures improved diffusion of the light in the lateral and/or upward direction, as a result of which this mudguard not only offers aesthetic added value, but can also increase the safety and ease of use of a bicycle.