Bicycle Stem Cap Aero Support Mounting

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Solution Overview

Problem

Existing bicycle handlebars face challenges with wind resistance, weight, and safety when using aero supports due to the need for additional clamping units that can be stressful and aesthetically unappealing, and require specialized clamping elements for non-circular cross-sections, leading to increased risk of accidents and weight.

Innovation Solution

A stem front cap with integrated receiving sections and clamping units that securely attach aero supports to the stem, allowing for a streamlined riding position without additional handlebar reinforcements, using materials like aluminum, titanium, or fibrous composites, and adjustable retaining units for forearm support, enabling flexible and safe use of aero supports with conventional handlebars.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If clamping units are attached to the handlebar to secure aero supports, then the aero supports can be mounted, but the handlebar may break due to heavy stresses and the clamping units deface the handlebar

Engineering Contradiction:

Improveaero support mounting capabilityVSAvoidhandlebar safety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces a stem cap as an intermediary component between the stem and the handlebar. The stem cap includes a recess that receives the handlebar and clamping units that secure the aero supports. This transfers the mounting function from the handlebar to the stem cap, protecting the handlebar from stress while enabling aero support installation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If the handlebar is designed for added stresses by clamping units, then aero supports can be securely mounted, but the handlebar weight increases even when aero supports are removed

Engineering Contradiction:

Improvehandlebar stress resistanceVSAvoidhandlebar weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The patent segments the functions by separating the aero support mounting capability from the handlebar itself and placing it in the stem cap. The handlebar remains a simple, lightweight component, while the stem cap contains the reinforced structure and clamping units needed for secure aero support attachment.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If clamping units are specially fitted for different cross-sectional shapes of handlebars, then various handlebar types can accommodate aero supports, but the device complexity increases

Engineering Contradiction:

Improvehandlebar type compatibilityVSAvoidclamping unit variety

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The stem cap is designed with a universal recess structure that can accommodate different handlebar cross-sectional shapes (round, oval, etc.). The clamping units are configured to work with this recess design, providing a single standardized solution that adapts to various handlebar types without requiring multiple specialized clamping unit designs.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS7744108B2Stem front CAP

Publication Date: 2010.06.29 NICOL MORGAN

AI summary

A stem front cap for the stem of a bicycle, including: a body having a mounting part that is adapted and structured for receiving and securing a handlebar in conjunction with a stem. A receiving section at the body of the stem front cap is provided for receiving and securing at least one aero support to enable the user to assume an aerodynamic operating posture on a bicycle.