Disposable Diaper Leg Flap Segmentation for Toe Safety
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Solution Overview
Problem
Conventional disposable pull-on diapers face difficulties in being easily put on a baby's body due to leg barrier cuffs or side flaps contracting and rising, which can catch the baby's toe, making it hard for the mother to smoothly and quickly put the diaper on.
Innovation Solution
The leg side flaps in the crotch region are divided into outer and inner regions, with the inner side region extending longitudinally and the outer side region extending transversely, ensuring a minimum dimension of 10 mm, to prevent the toe from being caught and facilitate easier diaper placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic members are arranged in leg barrier cuffs and side flaps to provide fit and containment, then the diaper achieves proper fit and containment, but the leg openings become straiten and may catch the baby's toe
Solution Approach 1:
The leg side flaps are segmented into distinct functional zones: a first region containing elastic members for containment, and a second region without elastic members forming a toe-safe zone. This segmentation allows different portions to serve different purposes - the elastic region provides fit and containment while the non-elastic region prevents toe catching during insertion.
Solution Approach 2:
Different regions of the leg side flaps are given different local qualities - the first region has elastic properties for containment while the second region has non-elastic properties for safety. This local differentiation allows the diaper to simultaneously achieve proper fit in the containment area while maintaining safety in the insertion area.
2Reliability
If leg side flaps are made with elastic members for proper fit, then the diaper achieves proper fit around the leg, but the flaps rise and straiten the leg openings making it difficult to pass the baby's legs through
Solution Approach 1:
The leg side flaps are divided into a first region with elastic members that provide proper fit when contracted, and a second region without elastic members that remains open to maintain wide leg openings. This segmentation enables the diaper to achieve both proper fit and quick insertion speed.
Solution Approach 2:
The solution addresses the contradiction by considering the spatial distribution of elastic members within the leg side flaps rather than uniformly applying elasticity. By placing elastic members only in specific regions (first region) and leaving other regions (second region) non-elastic, the design maintains leg opening width in the critical insertion area while providing fit in the containment area.
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
This design significantly reduces the likelihood of the baby's toe being caught by the leg flaps, making it easier and more convenient to put the diaper on, while maintaining open leg openings to prevent leakage and ensure a proper fit.
Implementation Method 1
an odd number of elastic members 82 extending in parallel in the front-back direction Z are arranged under tension in the outer side region 91
Data Source
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AI summary
The present invention aims to provide a disposable pull-on diaper improved so that the diaper may be conveniently put on the wearer's body. Each of leg side flaps (42) of a crotch panel (14) has an outer side region (91) and an inner side region (92). In the lowest region (70) of the crotch region (4), the outer side region (91) and the inner side region (92) respectively have a dimension of at least 10 mm in a transverse direction (X) wherein the inner side region (92) extends in a longitudinal direction (Y) and the outer side region (91) extends in the transverse direction (X) from the inner side region (92).