Two-Part Hook and Locking Fastener for Dense Fabric Without Damage
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Solution Overview
Problem
Existing two-piece fasteners damage fabrics with dense meshes and require specialized tools for assembly, limiting their application to materials like socks and not being suitable for denser materials like woven fabrics, plastic, or paper.
Innovation Solution
A fastening device with hook and locking members that allow secure interlocking without damaging materials, using pivotably connected locking members to enhance the locking effect and eliminate the need for specialized tools, enabling use on denser fabrics and other materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shank with pointed tip is used to penetrate fabric, then the fastening device can be attached to the material, but the fabric is damaged by the hole
Solution Approach 1:
The fastening device is divided into two separate parts: a first part with hook members that penetrates the fabric, and a second part with locking members that receives the hooks. This segmentation allows the hooks to be small enough to penetrate dense fabric without causing significant damage, while the locking members provide secure attachment on the other side of the material.
Solution Approach 2:
Instead of using a single penetrating element that must be large and strong (causing fabric damage), the invention inverts the approach by using small hook members for penetration and separate locking members for secure attachment. The locking members are positioned to receive the hooks from the opposite side, reversing the traditional single-piece penetration approach.
2Reliability
If a rivet tool is used for assembly, then the fastening device can be securely attached, but specialized tools are required
Solution Approach 1:
The locking members are designed to be manually operable without specialized tools. The user can directly manipulate the locking members to engage with the hook members, allowing the fastening device to be assembled by hand. This self-service approach eliminates the need for rivet tools while maintaining secure attachment through the interlocking hook and locking member design.
3Strength
If the mesh density of fabric is increased, then the fabric becomes more durable, but existing fasteners cannot penetrate without damage
Solution Approach 1:
By segmenting the fastening function into small hook members for penetration and separate locking members for secure attachment, the invention enables penetration of dense, high-strength fabrics. The hooks can be made sufficiently small to pass through tight mesh without causing significant damage, while the locking members provide the necessary secure attachment on the other side of the durable fabric.
4Object-affected harmful factors
If the hook member is made small to penetrate dense fabric, then penetration is possible, but the locking reliability may be reduced
Solution Approach 1:
The segmentation of the fastening device into separate hook members and locking members allows the hooks to be small for minimal fabric damage while the locking members can be designed with sufficient size and complexity to provide reliable locking. The locking members include features such as engagement surfaces and positioning structures that ensure secure attachment despite the small size of the penetrating hook members.
Solution Approach 2:
The hook members are designed to be received within recesses of the locking members, creating a nested structure. This nesting arrangement allows the small hook members to be securely held by the larger locking members, maintaining locking reliability while enabling the hooks to remain small enough for penetration of dense fabric without significant damage.
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 device provides secure interlocking without damaging materials, allowing use on denser fabrics and other materials like woven fabrics, plastic, or paper, and can be assembled by hand without specialized tools, ensuring reliability and ease of use.
Implementation Method 1
the locking member is configured to pivot in a direction towards the hook member when the hook member is in engagement with the locking member and a force is applied from the hook member on the locking member
Data Source
AI summary
A fastening device and a fastening system including two fastening devices. The fastening device includes a first part having a first engaging side and a second part having a second engaging side, and at least two sets of individual engaging members configured to engage each other. Each set of engaging members includes a hook member and a locking member. The hook member protrudes from the first engaging side and has an engagement side from which a hook protrudes. The locking member is pivotably connected to the second part and extends into a recess in the second engaging side. The recess is adapted to receive the hook member for engagement with the locking member, and the locking member is configured to pivot towards the hook member when the hook member is in engagement with the locking member and a force is applied from the hook member on the locking member.