Bicycle Handlebar with Form Memory Gel for Shock Absorption
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Solution Overview
Problem
Current handlebars for vehicles, particularly bicycles, fail to provide adequate shock absorption and proper hand positioning, leading to discomfort and potential long-term injuries such as nervous compression syndrome, neuropathy, and tendonitis during extreme use situations like downhill mountain biking.
Innovation Solution
A handlebar design featuring shock absorption parts made of form memory materials like expanded polyurethane gel, strategically positioned and fixed to a metal or carbon fiber frame with sunken seats and through-holes, providing increased surface area for hand support and reducing pressure on sensitive areas, thereby improving vibration damping and preventing incorrect hand positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sponge plastic is used to cover the handlebar, then the handling comfort is improved, but the shock absorption capacity is insufficient
Solution Approach 1:
The handlebar covering is divided into multiple segments: a rigid rubbery base layer providing shock absorption, and a separate sponge plastic layer providing comfort. This segmentation allows each layer to perform its specialized function without compromising the other.
Solution Approach 2:
The handlebar employs a composite structure combining rigid rubbery material (for shock absorption) with sponge plastic (for comfort). This composite approach integrates the advantages of both materials while mitigating their individual weaknesses.
2Strength
If rigid rubbery material is used to cover the handlebar, then the shock absorption capacity is improved, but the adaptability to user's hand shape deteriorates
Solution Approach 1:
The sponge plastic layer is applied locally on top of the rigid rubbery base, creating zones of different material properties. The sponge provides conformability where contact occurs, while the rigid base maintains shock absorption throughout.
Solution Approach 2:
The combination of rigid rubbery material and sponge plastic creates a composite covering that simultaneously provides shock absorption (from the rigid layer) and adaptability to hand shape (from the sponge layer).
3Strength
If the handlebar covering does not adapt to the user's hand shape, then the shock absorption is improved, but the harmful effects on the user's hand increase
Solution Approach 1:
The sponge plastic layer is positioned at the outer surface where direct hand contact occurs, providing local adaptability to prevent pressure points, while the rigid rubbery base layer underneath maintains overall shock absorption capacity.
Solution Approach 2:
The composite structure of rigid rubbery base and sponge plastic overlay simultaneously achieves shock absorption and prevention of hand injuries by distributing pressure evenly across the contact area.
4Ease of manufacture
If the handlebar covering is made from a single material, then the manufacturing simplicity is improved, but the functional performance deteriorates
Solution Approach 1:
The handlebar covering is manufactured as segmented layers that can be produced separately and then assembled. The rigid rubbery base and sponge plastic layer are manufactured independently using optimized processes for each material, then combined through adhesive bonding.
Solution Approach 2:
The composite structure allows each material layer to be manufactured using processes optimized for that specific material, then combined to achieve superior functional performance that neither material could provide alone.
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 handlebar design significantly enhances shock absorption and comfort by adapting to the user's hand, reducing the risk of injuries by distributing pressure evenly and preventing overloading of nerves, thus improving steering comfort and reducing the likelihood of pathologies.
Implementation Method 1
The parts 4 and 5 are made of any form memory material, or in any event able to dampen the impacts transmitted by the handlebar to the hand
Implementation Method 2
The parts 4 and 5 are made of any form memory material, or in any event able to dampen the impacts transmitted by the handlebar to the hand. Purely by way of example, the material in question is expanded polyurethane gel
Data Source
Figure 1~2
Figure 3~5
Figure 6~13
AI summary
A handlebar (1) for vehicles, in particular bicycles, both for road cycling and with mountain bikes, which comprises recesses filled with soft form memory material (4,5,6) able to dampen impacts to the cyclist's wrist, hand and fingers, while at the same time attenuating manual forces during use.