Pouch Slider Segmentation for Smooth, Low-Force Opening
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Solution Overview
Problem
Conventional pouches with slide fasteners face difficulties in smooth sliding of the slider due to their small size, requiring excessive gripping force and non-parallel alignment between the direction of force application and slider movement, leading to poor operability.
Innovation Solution
The pouch design features a slider with a maximum width of at least 5 times the outer width of the engaging section, made of soft or elastic material, and equipped with bumps or a detachable character catch, allowing easy gripping and parallel force application for smooth sliding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the slider is made small to fit the pouch, then the pouch size is reduced, but the slider becomes difficult to grip and operate smoothly
Solution Approach 1:
The slider is divided into two functional parts: a small engagement portion (width about 2mm) that fits within the pouch opening, and a large gripping portion (width about 6mm or more) that extends outward for easy hand operation. This segmentation allows each part to optimize its size for its specific function.
Solution Approach 2:
The slider design extends in the width dimension perpendicular to the sliding direction, creating a protruding gripping portion. This dimensional extension allows the slider to have both small engagement profile and large gripping surface without increasing the pouch opening size.
2Ease of operation
If the slider width is increased to improve grip, then the slider becomes easier to operate, but the pouch opening size must be increased
Solution Approach 1:
The slider structure is segmented into an engagement section (width 2mm) that passes through the pouch opening and a gripping section (width 6mm+) that remains outside. This allows the gripping portion to be large without requiring the pouch opening to accommodate the full slider width.
Solution Approach 2:
Different portions of the slider have different width characteristics: the engagement portion has small width (2mm) suitable for the pouch opening, while the gripping portion has large width (6mm+) for easy hand operation. Each local region is optimized for its specific function.
3Volume of moving object
If the slider is made small for compact pouch, then the pouch remains compact, but excessive gripping force is required
Solution Approach 1:
The slider separates the engagement function (small 2mm portion through opening) from the gripping function (large 6mm+ portion for fingers). This allows compact pouch design while providing sufficient gripping surface area to reduce required finger force to normal levels.
Solution Approach 2:
The slider design incorporates a ring shape that can be hooked by fingers, creating a natural gripping interface that distributes force across multiple finger points rather than requiring concentrated force on a small surface.
Data Source
AI summary
Provided is a pouch which is smoothly and easily opened and closed by a method of engaging/disengaging recessed and raised strips. This pouch has, on one surface thereof, a recessed strip and/or raised strip, and on another surface thereof, a raised strip and/or recessed strip opposite the recessed strip and/or raised strip, and also includes a slider for engaging/disengaging the recessed strip and the raised strip. The slider has a section satisfying [5≤(maximum width of at least a portion of the slider)/(outer width of the engaged portion when the recessed strip and the raised strip are engaged)].