Running Shoe Ball Rocker Offset and Localized Insole Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional running shoes are unsatisfactory from an ergonomic perspective, particularly for diabetics, due to high pressure loads and poor force distribution during running, which exacerbates skin and blood circulation issues in the legs and feet.
Innovation Solution
A running shoe design with a roll or tilt line offset backwards relative to the ball of the foot, combined with a rigid insole and customized mechanical resistance in the tarsal and metatarsal areas, to reduce rolling resistance and distribute pressure evenly across the foot, mimicking the natural S-shaped rolling line of the human foot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the ball of the foot is arranged centrally above a rolling or tilting line on the underside of the sole, then the shoe structure is simple and conventional, but high pressure loads occur during running which are harmful for diabetics and people with skin and blood circulation problems
Solution Approach 1:
The outsole is designed with varying mechanical resistance in different areas: the inner tarsal edge section and outer metatarsal edge section have higher mechanical resistance, while the outer tarsal edge section and inner metatarsal edge section have lower mechanical resistance. This local differentiation optimizes force distribution during the running gait cycle, reducing pressure peaks on the foot while maintaining overall structural integrity.
Solution Approach 2:
The patent introduces a new dimensional parameter - the offset distance between the ball line and ball roller (5-15mm) - to create a more natural rolling motion. This dimensional adjustment transforms the traditional central ball position into an offset configuration that better mimics the natural S-shaped rolling line of the human foot, thereby reducing harmful pressure loads during running.
2Stability of the object's composition
If the insole is made rigid to increase stability and improve foot hold, then shoe stability is improved, but the shoe becomes less flexible and potentially less comfortable
Solution Approach 1:
The insole is selectively glued to the outsole at specific locations (the top edge of the outsole in the shaft area) rather than across the entire surface. This localized attachment provides stability and foot hold where needed while preserving flexibility in the forefoot and heel areas, allowing natural foot movement during running.
Solution Approach 2:
The shoe construction combines different material properties: a rigid insole material for stability, a flexible outsole material for comfort and movement, and an adhesive bonding system. This composite approach allows the shoe to simultaneously achieve both stability and flexibility, with each component contributing its optimal properties to the overall performance.
3Ease of operation
If the roll or tilt line is offset backwards relative to the ball of the foot, then rolling resistance is reduced and ergonomics are improved, but the shoe design becomes more complex
Solution Approach 1:
The patent introduces a new dimensional parameter - the offset distance between the ball line and ball roller (5-15mm) - to create a more natural rolling motion. This dimensional adjustment transforms the traditional central ball position into an offset configuration that better mimics the natural S-shaped rolling line of the human foot, thereby reducing harmful pressure loads during running.
Solution Approach 2:
The patent modifies key geometric parameters of the shoe sole: the ball roller is positioned 5-15mm behind the ball line, and the outsole thickness varies in different areas (8-15mm in the heel area, 4-8mm in the forefoot area). These parameter changes optimize the rolling characteristics and force distribution, improving ergonomics while maintaining manufacturability.
4Ease of operation
If the outsole has different mechanical resistance in different areas, then force distribution is optimized for natural running, but manufacturing precision requirements increase
Solution Approach 1:
The outsole is designed with varying mechanical resistance in different areas: the inner tarsal edge section and outer metatarsal edge section have higher mechanical resistance, while the outer tarsal edge section and inner metatarsal edge section have lower mechanical resistance. This local differentiation optimizes force distribution during the running gait cycle, reducing pressure peaks on the foot while maintaining overall structural integrity.
Solution Approach 2:
The patent modifies key geometric parameters of the shoe sole: the ball roller is positioned 5-15mm behind the ball line, and the outsole thickness varies in different areas (8-15mm in the heel area, 4-8mm in the forefoot area). These parameter changes optimize the rolling characteristics and force distribution, improving ergonomics while maintaining manufacturability.
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a shoe, in particular a running shoe, comprising: an outsole, which has a predetermined ball line (37), which extends from an inner ball point to an outer ball point, and a ball rocker (38), which is offset rearward toward the heel end (26) in relation to the ball line (37) by an average ball rocker distance (41); an upper; and an insole, which is arranged above the outsole and which is adhesively bonded, together with an edge of the upper, to a top side of the outsole.