Disposable Wearing Article End Flap Structure Against Waist Slippage
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Solution Overview
Problem
Attachable-type disposable wearing articles suffer from poor fitting properties, particularly in the round-waist direction, leading to slipping down and potential leakage due to inadequate attachment to the iliac crest.
Innovation Solution
Incorporation of a deformable stretching/contracting member in the end flap of the dorsal section, with fixed areas and an unfixed area that contracts to form obliquely backward portions, facilitating attachment to the iliac crest and preventing slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If belts are projected obliquely backward from the lateral portions of the main body section, then slipping-down preventive effect is improved, but device complexity increases and connecting portions are prone to kink
Solution Approach 1:
The patent extracts the slipping-down prevention function from a complex belt system and concentrates it into a single deformable stretching/contracting member located at the back edge of the dorsal section. This member can be drawn obliquely backward to form a catching portion that engages with the wearer's body, eliminating the need for multiple belts and their complex connecting portions while maintaining effective slipping-down prevention
Solution Approach 2:
The patent utilizes the elastic deformation parameter of the stretching/contracting member to achieve the oblique backward drawing effect. By selecting materials and结构设计 that allow controlled deformation, the member can dynamically adjust its position to form the catching portion without requiring complex mechanical linkages or hinges, thus simplifying the overall structure while maintaining reliability
2Ease of operation
If the back edge of the dorsal section is placed on the waist according to ordinary wearing procedure, then ease of operation is improved, but the back edge is located beside the iliac crest making it difficult to catch on the iliac crest
Solution Approach 1:
The patent introduces a dynamic element at the back edge of the dorsal section through the deformable stretching/contracting member. This member can change its position and orientation based on wearers' actions - when the wearer pulls or adjusts the article, the member can be drawn obliquely backward to form a catching portion that engages with the iliac crest, providing adaptability that static designs cannot achieve
Solution Approach 2:
The stretching/contracting member is pre-positioned at the back edge of the dorsal section in a ready state, allowing it to be quickly drawn backward to form the catching portion when needed. This preliminary positioning enables the structure to respond rapidly to wearer adjustments without requiring complex real-time control mechanisms
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 deformable stretching/contracting member ensures excellent slipping-down prevention with a simpler structure, enhancing fitting and leak protection by easily catching on the iliac crest.
Implementation Method 1
a deformable stretching/contracting member (50) fixed to the end flap (EF), the deformable stretching/contracting member (50) having a pair of fixed areas (51) fixed in lateral portions, respectively, opposed in a width direction (WD) of the end flap (EF), and an unfixed area (52) elastically stretchable/contractible in the width direction (WD) and located between the fixed areas (51)
Data Source
AI summary
The problem is to provide excellent slipping-down preventive property with a simpler structure. This problem is solved by an attachable-type disposable wearing article configured so that, in the natural length state, as the unfixed area contracts, a pair of side areas of the end flap positioned lateral to the unfixed area are obliquely drawn closer as they extend backward, which results in formation of transverse portion extending in the width direction at the back edge of intermediate area located between the pair of side areas, while obliquely backward portions are formed at the back edges of the side areas positioned more backward as they extend laterally, and in the spread state, the back edge of the end flap extends along the width direction over the extent including from one of the obliquely backward portions to the other.