Luggage Zipper Loop Assembly for Precise Shell Alignment
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Solution Overview
Problem
Existing luggage cases with zip closures face issues such as misaligned shells due to imprecise and inefficient attachment of zipper loops, high production costs due to fixed expandable/non-expandable designs, and unsightly gaps from end clips, which require improved attachment structures and modular expansion options.
Innovation Solution
The solution involves overmolding joining members to attach zipper ends precisely, creating a modular expansion zipper assembly that can be added post-production, and using interlocking end clips to eliminate gaps, enhancing precision, efficiency, and aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional attachment methods are used for zipper loops, then manufacturing process is simpler, but alignment precision and repeatability deteriorate
Solution Approach 1:
The zipper assembly is segmented into multiple components: zipper members, joining members, and end clips. The joining member is specifically segmented to include a first portion for attaching to one zipper member and a second portion for attaching to another zipper member, allowing precise alignment of zipper loops through modular construction
Solution Approach 2:
End clips are pre-positioned on the zipper members before final assembly. The joining member is configured with pre-defined attachment portions that align zipper ends at predetermined positions, ensuring repeatable alignment precision without requiring complex post-assembly adjustments
2Adaptability or versatility
If fixed expandable/non-expandable designs are used, then manufacturing process is simpler, but adaptability to market demand deteriorates
Solution Approach 1:
The zipper assembly incorporates a dynamic configuration where end clips can be positioned at different locations along the zipper members. This allows the same basic structure to accommodate both expandable and non-expandable luggage case designs, enabling production flexibility without requiring entirely different manufacturing processes for each variant
Solution Approach 2:
The joining member and end clip assembly serve multiple functions: they can create fixed zipper loops for non-expandable cases or allow extended zipper configurations for expandable cases. This universal design enables a single production line to manufacture both types of luggage cases using the same core components and processes
3Shape
If traditional end clips are used, then zipper assembly is simpler, but aesthetic appearance deteriorates due to gaps
Solution Approach 1:
The end clips are merged with the joining member to form an integrated assembly. The first end clip is attached to the first portion of the joining member, and the second end clip is attached to the second portion, creating a unified structure that eliminates gaps between clips while maintaining structural integrity and aesthetic appearance
Data Source
AI summary
A luggage case including a zipper loop mounted thereon, the luggage case including a first zip member having an elongated first tape member with first zipper teeth extending along an edge, the first zip member having first and second opposing ends, the first zip member attached along a first rim portion of a first shell; a second zip member having an elongated second tape member with second zipper teeth extending along an edge, the second zip member having third and fourth opposing ends, the second zip member attached along a second rim portion of a second shell, and wherein the first zip member and the second zip member include substantially the same number of zipper teeth; the first zip member and the second zip member are attached together by engaging the first and second zipper teeth, with the first opposing end laterally adjacent the third opposing end, and the second opposing end laterally adjacent the fourth opposing end; the first opposing end attached to the second opposing end by a first joining member; and the third opposing end attached to the fourth opposing end by a second joining member.