Nested Zipper Security Device Resisting Forced Opening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Luggage zippers are vulnerable to theft as they can be opened by external pressure using a pointed object, and existing security solutions either fail to provide adequate protection or are not suitable for frequent use and easy operation.
Innovation Solution
A security device for luggage featuring a first exterior zipper and a second interior zipper, where the teeth of the inner zipper provide rigid support to prevent dislocation under external pressure, with the two zippers being superimposed or offset to enhance security while maintaining ease of use and ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single zipper is used for luggage closure, then ease of operation is maintained, but security against theft is insufficient as teeth can be separated by external pressure
Solution Approach 1:
The patent implements a nested zipper structure where an inner zipper is positioned inside the outer zipper. The inner zipper's teeth are engaged within the outer zipper's teeth, creating a nested configuration. This nested arrangement allows the inner zipper to provide structural support to the outer zipper's teeth, preventing them from being separated by external pressure tools, thereby enhancing security while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent combines two zipper systems (outer zipper and inner zipper) into a composite closure structure. The outer zipper provides the primary closure function with ease of operation, while the inner zipper reinforces the teeth structure to resist forced opening. This composite approach integrates multiple functional elements into a unified security device that addresses both security and usability requirements.
2Reliability
If existing security solutions with multiple zippers are implemented, then security is improved, but ease of operation and frequent use are compromised
Solution Approach 1:
The patent merges the security function and the closure function into a single integrated system. The inner zipper is positioned such that its teeth are engaged within the outer zipper's teeth path, allowing both zippers to be operated simultaneously or in sequence without requiring separate manual operations. This merging of functions ensures that securing the luggage and closing it are achieved through a unified mechanism that maintains ease of operation.
Solution Approach 2:
The inner zipper is pre-positioned and engaged within the outer zipper structure before the luggage is closed. This preliminary arrangement ensures that when the outer zipper is closed, the inner zipper's teeth are already in place to provide structural reinforcement. The user does not need to separately engage the inner zipper, as it is automatically positioned to provide security during the normal closing operation.
3Strength
If the zipper teeth are made thicker for security, then resistance to forced opening is improved, but breakage rate increases and ease of operation decreases
Solution Approach 1:
The patent divides the strength function into two separate zipper systems rather than relying on a single thick-toothed zipper. The outer zipper maintains thin, flexible teeth for ease of operation, while the inner zipper provides the structural reinforcement needed to resist forced opening. This segmentation allows each zipper to be optimized for its specific function without compromising the other.
Solution Approach 2:
The inner zipper acts as an intermediary structural element between the outer zipper and the luggage contents. Its teeth are engaged within the outer zipper's teeth, providing a mediating support structure that prevents the outer zipper's teeth from being forced apart. This intermediary reinforcement allows the outer zipper to remain thin and easy to operate while still achieving high resistance to forced opening.
Data Source
Figure 1~4
Figure 5~8
AI summary
The invention relates to a security device for luggage, comprising a first external zip fastener (1) and a second internal zip fastener (2). The two zip fasteners (1, 2) are placed directly on top of one another, such that the teeth (1a, 2a) of the zip fasteners (1, 2) come into contact when an external pressure is applied against the external zip fastener (1) with a pointed tool (P), thereby preventing the teeth of the external zip fastener (1) from disengaging and moving downwards under the force of said tool (P).