Double Zipper Assembly with Offset Webs for Confined-Space Access
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Solution Overview
Problem
Existing zipper assemblies with a web connection require a fixed space for handling and access, making it difficult to access contents in cramped environments, especially in emergencies.
Innovation Solution
A double zipper assembly with offset web sections allows for variable unfolding directions, enabling access in either deeper but narrower or broader but shallower spaces, depending on available space, by using two zippers with limp or resiliently flexible webs that remain connected even when fully opened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a web connection is used to connect two components, then the components remain connected when the zipper is opened, but access to contents requires a fixed space corresponding to the shape and dimensions of the two components in unfolded state
Solution Approach 1:
The web connection is divided into two separate web sections, each associated with a different zipper. This segmentation allows independent access paths: one zipper provides access when the bag is set down with the web section accessible, while the other zipper provides access when the bag is held upright. This resolves the contradiction by maintaining reliable connection through the web while enabling easier access in different operational scenarios.
Solution Approach 2:
The system transitions from a static web connection to a dynamic configuration where two zippers provide different access modes. When the first zipper is opened, the two components can be unfolded along the first web section; when the second zipper is opened, they can be unfolded along the second web section. This dynamic adaptability resolves the contradiction between reliable connection and ease of access.
2Device complexity
If a single web section is used, then the structure is simple, but complete access to contents requires a space for handling that corresponds to at least the shape and outer dimensions of the two components when unfolded
Solution Approach 1:
The single web section is segmented into two separate web sections, each providing a different unfolding path. This increases structural complexity slightly but dramatically improves handling ease by allowing the bag to be accessed in different orientations depending on the available space.
Solution Approach 2:
The solution adds a dimensional aspect to the unfolding process by providing two different planes of unfolding through the two web sections. This allows the bag to be accessed either by unfolding along the first web section or along the second web section, accommodating different spatial constraints.
3Productivity
If the bag is designed for quick access in emergencies, then handling should be fast and unobstructed, but existing zipper assemblies require a fixed space that may be unavailable in cramped environments
Solution Approach 1:
The dual zipper system with two web sections provides dynamic adaptability to different spatial situations. In emergencies, the user can quickly determine the available space and choose the appropriate zipper to open, enabling fast access without being constrained by a fixed unfolding direction.
Solution Approach 2:
The system changes the parameter of unfolding direction by providing two different web sections. This allows the bag to be accessed by unfolding along different axes depending on the available space, improving both access speed and adaptability to cramped environments.
Data Source
AI summary
A double zipper assembly includes a first zipper and a second zipper, each having a pair of side portions with teeth and at least one slider. The pairs of side portions of the first zipper and of the second zipper are each sectionally interconnected by means of a web. A side portion of the pair of side portions of the first zipper is connected with a side portion of the pair of side portions of the second zipper along its entire length. The webs of both zippers are disposed offset to one another with respect to the longitudinal direction of their side portions.