Adjustable Bicycle Handlebar Extension with Sliding Mechanism
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Solution Overview
Problem
Existing bicycle handlebar extensions for time trials and triathlons lack adjustability, particularly in length, which limits their ability to fit cyclists of different morphologies, compromising aerodynamics and ergonomics.
Innovation Solution
The design features two separate extension devices with a sliding mechanism allowing longitudinal adjustment, combined with an adjustable armrest system that includes height, forward/backward, lateral, and rotational adjustments, along with interchangeable handles for optimal fit and aerodynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If extensions are made as separate adjustable parts, then adaptability to different cyclists is improved, but aerodynamics deteriorate due to gaps and misalignments
Solution Approach 1:
The extension device is divided into two separate parts: a first part forming an armrest and a second part forming an extension. This segmentation allows independent adjustment of each part to suit different cyclist morphologies while maintaining aerodynamic continuity when properly aligned.
Solution Approach 2:
The second part forming an extension is designed to slide longitudinally relative to the first part, enabling dynamic adjustment of the distance between them. This allows the extension length to be customized for different cyclists while maintaining a continuous, aerodynamic profile when assembled.
2Ease of manufacture
If extensions are fixed in length, then manufacturing simplicity is improved, but adaptability to different cyclist morphologies deteriorates
Solution Approach 1:
By dividing the extension into two separately manufacturable parts, the system achieves manufacturing simplicity for each individual component while enabling length customization through the sliding connection between parts.
Solution Approach 2:
The sliding mechanism between the two parts provides adjustable length without requiring complex manufacturing processes. Each part can be manufactured to standard dimensions, and the variable length is achieved through the relative movement capability of the assembly.
3Device complexity
If armrests are fixed in position, then device complexity is reduced, but ergonomics deteriorate for cyclists with different anatomies
Solution Approach 1:
The armrest (first part) is designed with longitudinal sliding capability relative to the extension (second part), allowing ergonomic adjustment for different forearm lengths and cyclist anatomies while maintaining a relatively simple mechanical connection.
Data Source
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AI summary
The invention proposes an aerodynamic assembly for a bicycle handlebar, comprising two separate extension devices (4a, 4b), each of the two extension devices (4a, 4b) comprising: a first part (5a, 5b) forming an armrest, suitable for being fixed on a crossbar of a bicycle handlebar (1) by extending longitudinally forward and comprising a longitudinal extension (6a, 6b) forming a free end portion, an upper surface of the first part with its longitudinal extension forming a surface for a part of a cyclist's forearm;and a second part (8a, 8b) forming an extension, adapted to be fixed, in a removable manner and in the extension of the first part (5a, 5b), to the free end portion, the second part (8a, 8b) forming an extension being adapted to slide longitudinally relative to said longitudinal extension (6a, 6b) to allow adjustment of a distance separating a free end of the second part (8a, 8b) forming an extension from the first part (5a, 5b) forming an armrest.;