Thermal Bonded Zipper Frame for Suitcase Stability
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Solution Overview
Problem
Current zipper suitcase manufacturing requires manual sewing, limiting production efficiency and resulting in unstable zippers when loaded with luggage.
Innovation Solution
A zipper structure featuring hard front and rear frame strips with thermal bonding and automatic fixing coils, eliminating the need for manual sewing and enhancing stability through recessed and protrusion engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual sewing is used for zipper attachment, then the zipper can be securely attached, but production efficiency is reduced and labor costs increase
Solution Approach 1:
The patent replaces the manual sewing process with a thermal bonding system. The frame strips are equipped with heating elements that melt and bond the zipper chains to the suitcase body through thermal contact, eliminating the need for manual needle and thread operations while maintaining secure attachment.
Solution Approach 2:
The zipper attachment system performs self-service through automatic positioning and bonding mechanisms. The frame strips with heating elements automatically bond the zipper chains when pressed against the suitcase body, reducing dependency on manual labor and enabling automated production lines.
2Reliability
If traditional zipper structures are used, then the suitcase can be closed, but the zipper becomes unstable when loaded with luggage
Solution Approach 1:
The patent employs composite construction by integrating the zipper chains with rigid frame strips that are thermally bonded to the suitcase body. This composite structure distributes the load across both the zipper and the reinforced frame, preventing zipper instability when luggage is loaded.
Solution Approach 2:
The zipper system is segmented into front and rear frame strips with independent heating elements and bonding zones. This segmentation allows each segment to independently bear and distribute loads, enhancing overall zipper stability under heavy luggage conditions.
3Extent of automation
If hard frame strips with thermal bonding are used, then automatic production is enabled and stability is improved, but manufacturing complexity increases
Solution Approach 1:
The frame strips serve multiple functions: they provide structural reinforcement, contain heating elements for thermal bonding, and act as attachment points for the zipper chains. This multi-functionality reduces the need for separate components and simplifies the overall manufacturing system despite the advanced bonding capabilities.
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
Enables automatic production of zipper suitcases with improved stability and security, comparable to frame suitcases, by using thermally bonded and adjustable frame strips with automatic fixing coils.
Implementation Method 1
The front frame strip is bonded on the front case of the suitcase by thermal pressing. The rear frame strip is bonded on the rear case of the suitcase by thermal pressing.
Data Source
AI summary
Provided is a zipper structure for suitcases, including a zipper strip. The zipper strip includes a front chain belt and a rear chain belt, and also includes a front frame strip and a rear frame strip. The front frame strip is bonded on the front case of the suitcase by thermal pressing. The rear frame strip is bonded on the rear case of the suitcase by thermal pressing. The front chain belt is connected to the front frame strip through the front zipper fixing coil. The rear chain belt is connected to the rear frame strip through the rear zipper fixing coil. Also disclosed is a trolley bag utilizing the zipper structure for suitcases as described. The zipper structure and trolley bag as provided cancels the traditional manual sew process and realize the automatic production for zipper suitcases.