Helical Hook Fastening Strap for Curved Foam Cushion Bonding
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Solution Overview
Problem
Existing hook-and-loop fastening straps for seat cushions face issues with insufficient bonding force, limited applicability to curved surfaces, and complex, costly manufacturing processes due to their laminated structure and inability to bend or curve.
Innovation Solution
A fastening strap with a substantially flat hollow helical body made from a single hook strap, formed by plastic injection and sequential folding, allowing it to be compressed and securely embedded in U-shaped grooves during foam molding, providing strong bonding and flexibility to fit both straight and curved surfaces without additional processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional laminated fastening straps are used, then they provide basic fastening function, but they have insufficient bonding force and complex manufacturing structure
Solution Approach 1:
The patent merges multiple layers (substrate layer, magnetic material layer, hook strap layer, protection layer) into a single integrated fastening strap made from one piece of elastic plastic material. This integration maintains all necessary functions while simplifying the manufacturing structure and eliminating layer bonding issues that caused insufficient bonding force.
Solution Approach 2:
The patent uses elastic plastic material that combines the properties of substrate, magnetic material, and hook strap into a single composite material. This composite approach provides both the structural integrity needed for strong bonding and the functional properties of traditional multi-layer straps.
2Adaptability or versatility
If traditional fastening straps are used, then they are simple in structure, but they cannot bend or curve sideway limiting applicability
Solution Approach 1:
The patent employs elastic plastic material that allows the fastening strap to be flexible and bendable. This flexibility enables the strap to conform to curved surfaces and complex geometries while maintaining its structural integrity and fastening function, significantly improving adaptability.
Solution Approach 2:
The fastening strap is designed with dynamic flexibility through the use of elastic material, allowing it to adapt to different surface geometries. This dynamic property enables the same simple structure to serve both straight and curved applications without modification.
3Adaptability or versatility
If additional cutting molds are developed for curved fixing grooves, then curved surfaces can be accommodated, but manufacturing cost increases
Solution Approach 1:
The elastic plastic fastening strap serves multiple functions with a single design - it can be stretched and bent to fit both straight and curved fixing grooves. This universal applicability eliminates the need for different cutting molds for different geometries, reducing manufacturing costs while maintaining versatility.
Solution Approach 2:
The patent utilizes the ability to change the physical parameters (shape, curvature) of the fastening strap through stretching and bending after molding. This parameter change capability allows a single molded piece to adapt to various groove geometries without requiring different molds, significantly reducing manufacturing complexity and cost.
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
The solution offers a strong, cost-effective bonding to seat cushions, enabling use on both straight and curved surfaces without extra processing, and simplifies manufacturing by eliminating the need for complex layers and molds.
Implementation Method 1
the fastening strap is compressed laterally and is kept in the groove by means of the returning force generated by the configuration of the hollow helical body of the fastening strap and the elasticity of the plastic material of the fastening strap
Implementation Method 2
injecting the foaming mold with a foam material to perform a foam molding process, in which the foam material penetrates into the space among hooks so as to firmly binding the fastening strap to the foam article
Data Source
Figure 1~2
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AI summary
The present invention relates to a fastening strap (20) for being used in a foam article (40). A sideway-bendable fastening strap (20) for a foam article includes a substantially flat hollow helical body made from a single hook strap (10) having a first outer surface (21), a second outer surface (22), and a plurality of hooks (12) integrally formed on each of the first and second outer surfaces; wherein the hook strap is formed by plastic injection process and has a substrate (11) and a plurality of hooks (12) integrally formed on one face of the substrate, and wherein the hollow helical body is formed by sequentially and continually folding the hook strap from one end of the hook strap toward the other end of the hook strap along a number folding lines (13) which are parallel with each other and at an angle (θ) with respect to a longitudinal axis of the hook strap with the face having the hooks formed thereon facing outward such that the hook strap is plastically and permanently deformed at the folding lines to form a hollow helical body having a width (w).