Infant Footwear Toe Room Design for Stable Walking
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Solution Overview
Problem
Current footwear for infants and toddlers is designed by reducing adult footwear sizes, neglecting unique foot shape and walking characteristics, leading to potential foot deformities, unbalanced development, and impaired cognitive behavioral growth due to restricted toe movement and elevated center of gravity.
Innovation Solution
The design features a toe room higher than the toe, a fan-shaped inner space with gradually broadening bottom surfaces, and a thin, flexible sole with through holes, optimized for foot shape and movement, minimizing interference and promoting stable walking and normal growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adult footwear is reduced in size to create infant footwear, then manufacturing cost and design simplicity are improved, but foot shape characteristics and walking characteristics of infants are not considered, leading to foot deformity and unbalanced development
Solution Approach 1:
The patent applies local quality by creating different spatial characteristics in different regions of the footwear. The toe room has a height of 20-30mm at 80-85% of the length from the back end, providing vertical space for toe movement, while the bottom surface has a fan shape with gradually increasing width from heel to toe. This localized differentiation addresses infant foot development needs without requiring complete redesign of the entire footwear structure.
Solution Approach 2:
The patent changes critical dimensional parameters of the footwear to match infant foot characteristics. The inner space length is set to 110-140mm, the toe room height at the front end is 20-30mm, and the bottom surface width ratio (toe/heel) is 1.6-1.7 times. These parameter adjustments transform adult footwear proportions into infant-appropriate dimensions, resolving the contradiction between manufacturing simplicity and developmental appropriateness.
2Ease of operation
If the toe room is formed higher than the toe, then toe movement freedom is improved, but footwear complexity increases
Solution Approach 1:
The patent resolves the contradiction by utilizing the vertical dimension rather than increasing horizontal complexity. The toe room height of 20-30mm at 80-85% of the length from the back end creates vertical space for toe movement while maintaining a relatively simple overall footwear structure. This dimensional approach allows functional improvement without proportionally increasing structural complexity.
3Stability of the object's composition
If the sole thickness is decreased, then center of gravity stability is improved, but footwear protection and cushioning are reduced
Solution Approach 1:
The patent employs a flexible sole with thickness of 3-7mm that balances stability and protection needs. The flexible material allows the sole to be thin enough to maintain the infant's center of gravity close to the ground (improving stability) while still providing sufficient cushioning and protection (maintaining strength). The flexibility enables the sole to adapt to foot movements without requiring excessive thickness.
4Adaptability or versatility
If the inner space bottom surface width increases from rear to front, then fan-shaped foot sole accommodation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements asymmetry in the bottom surface design, where the width at the toe end (1.6-1.7 times the heel width) differs from the heel width. This asymmetric fan shape accommodates the natural fan-shaped foot sole of infants while providing clear, measurable dimensional specifications (width ratios and specific length proportions) that guide manufacturing, thereby balancing adaptability with manufacturing precision.
Data Source
Figure 1~2
Figure 3
Figure 4(a)~4(b)
AI summary
The present disclosure relates to footwear (100) for infants and toddlers manufactured according to foot shape characteristics and walking characteristics of infants and toddlers, different from those of adults, and a last used for manufacturing the same. The footwear for infants and toddlers includes an inner space (10) composed of a toe room (12) in which the toe is disposed, a heel room (14) in which the heel is disposed, and a middle room (16) located between the toe and the heel and in which the foot sole and the foot top are disposed. In particular, since the toe room (12) is formed higher than the toe, an infant or toddler walks while minimizing interference in toe movement. If the footwear for infants and toddlers and the last used for manufacturing the same according to the present disclosure is used, since the toe room is provided higher than the toe, an infant or toddler may walk more stably and cognitive behavior development of the infant or toddler may be promoted. In addition, since the inner space has a bottom surface with a fan-shaped foot sole whose width is increasing from the back end to the front end in accordance with the foot sole of an infant or toddler, abnormal growth of the foot of the infant or toddler may be prevented.