Foot Stabilizing Device with Reducing Stress Structure
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Solution Overview
Problem
Existing foot insoles fail to provide stable support, leading to foot sliding and instability during walking due to uneven stress distribution and shifting contact positions, which can affect knee and pelvis alignment and even spine posture.
Innovation Solution
A foot stabilizing device with a reducing stress structure on the insole body, featuring a longitudinal design from the toe region to the midfoot area, including oval or prolate elliptical shapes with tapered ends, and optional assistant structures to reduce contact force and prevent sliding, incorporating balancing bumps for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional insoles with three-point mechanics or heel cup design are used, then foot support is provided, but the foot contact position shifts after long time walking causing foot sliding and instability
Solution Approach 1:
The insole is divided into multiple functional regions: a reducing stress structure with reduced contact force in the metatarsal region, a normal stress region, and balancing bumps. This segmentation allows different areas to perform specialized functions - the reducing stress structure prevents sliding at the metatarsal head level while other regions provide support and balance, collectively maintaining foot stability throughout walking.
Solution Approach 2:
The patent applies different contact force characteristics to different regions of the insole. The reducing stress structure specifically reduces contact force in the metatarsal region where sliding occurs, while other regions maintain normal or increased contact force. This localized differentiation addresses the sliding problem without compromising overall foot support.
2Ease of operation
If planar surface on insole contacts protruding portions of foot (second and third metatarsus), then foot support is provided, but foot slides forward or sideway ruining walking posture stability
Solution Approach 1:
Instead of making the insole surface protrude to match the metatarsal heads (traditional approach), the patent inverts the approach by creating a reducing stress structure that recesses or reduces contact force in the metatarsal region. This allows the foot to rest on the insole without the metatarsal heads sliding on a planar surface, thereby preventing forward or sideways sliding while maintaining support.
3Force
If insole design follows three-point mechanics, then stress balance is achieved, but contact position shifts causing foot sliding
Solution Approach 1:
The patent extends the three-point mechanics concept by segmenting the insole into multiple stress zones: a reducing stress structure (first stress concentration region), a normal stress region, and balancing bumps (second stress concentration region). This creates a multi-point stress distribution system that maintains force balance while preventing contact position shifts through the reducing stress structure's ability to stabilize the metatarsal region.
Data Source
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AI summary
The present invention provides a foot stabilizing device, which can be an insole body or a sole body having a foot contacting surface. The insole body or the foot contacting surface of the sole body has a toe region, a foot sole region, a foot arch region, and a foot heel region for corresponding to the toes, the foot sole, the foot arch and the foot heel of a user's foot, respectively. The present invention is characterized in that a reducing stress structure is formed between a center position of a rear end of the toe region and a middle portion of the foot sole region in longitudinal direction. Thus, the contacting force between the use's foot and the reducing stress structure can be minimized and the user's foot can be stabilized on the insole body or the sole body thereby to prevent the foot from sliding forwardly or around.