Zipper Tooth Bonding via Positioning Grooves and Posts
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Solution Overview
Problem
Traditional derlin zippers have a weak bonding capacity between the teeth and the tape, causing teeth to frequently escape from the tape due to the reliance on enwrapping force alone.
Innovation Solution
The zipper design incorporates positioning grooves and holes, with posts passing through these holes to enhance bonding, and a weaving structure of warp and weft yarns to improve the attachment, providing a stronger bonding force beyond the enwrapping force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the tooth is fixed with the tape only by enwrapping force between the tooth and the filler cord, then the structure is simple, but the bonding capacity between the tape and the tooth is weak
Solution Approach 1:
The bonding area is nested within the positioning groove of the tooth, creating a hierarchical structure where the bonding area fits into the groove and is further secured by the post passing through the positioning hole. This nested arrangement enhances bonding capacity while maintaining structural efficiency.
Solution Approach 2:
The bonding area acts as an intermediary element between the tooth and the tape. It provides an additional bonding interface that works together with the enwrapping force of the filler cord, thereby enhancing the overall bonding capacity without significantly complicating the structure.
2Ease of manufacture
If the tooth is fixed with the tape only by enwrapping force, then the manufacturing process is simple, but the tooth is prone to escape from the tape
Solution Approach 1:
The positioning groove and positioning hole are pre-formed during the molding process, and the bonding area is designed with predetermined geometric features. This preliminary preparation ensures that when the tooth and tape are assembled, the bonding area automatically engages with the positioning groove and is secured by the post, preventing tooth escape without requiring complex post-assembly operations.
Solution Approach 2:
The zipper component is made of derlin material, and the bonding area incorporates a post that passes through the positioning hole. This composite structure combines the enwrapping force of the filler cord with the mechanical anchoring of the post in the positioning hole, thereby enhancing tooth retention while maintaining manufacturing simplicity through injection molding.
3Strength
If positioning grooves and holes with posts are added to enhance bonding, then the bonding force between tooth and tape is improved, but the device complexity increases
Solution Approach 1:
The positioning groove, positioning hole, and bonding area are merged into a single integrated structure during the injection molding process. The bonding area is formed as part of the tooth geometry, and the post is molded as an integral component. This merging approach enhances bonding force while minimizing the increase in device complexity by creating a unified structure rather than separate components.
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
This design significantly enhances the bonding force between the teeth and the tape, preventing teeth from escaping and creating a reflective, visually appealing surface when illuminated.
Implementation Method 1
the bonding area of each tape jams into the positioning grooves of the plurality of teeth to position the teeth on the tape
Implementation Method 2
the post passes through a corresponding positioning hole to fix the tooth on the tape
Implementation Method 3
a filler cord latched into the fixing groove
Data Source
AI summary
A zipper of the disclosure includes a pair of opposite tapes. A plurality of teeth are positioned at a bonding area of each tape. Each of the plurality of teeth 100 defines a positioning groove, and includes a post located in the positioning groove. A portion of the bonding area of the tape corresponding to each tooth defines at least one positioning hole. The post of each tooth passes through a corresponding positioning hole to fix the tooth on the tape firmly.