String Fastening Device With Elastic Suspension And Rotational Bobbin
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Solution Overview
Problem
Existing string fastening devices are inconvenient to use and difficult to separate from the string, leading to reduced merchantability and usability, especially in consumer goods like shoes, bags, and clothes, where the string is often permanently fixed.
Innovation Solution
A string fastening device comprising a base, a bobbin with a fixation member and a rotational member, and a string suspension member that allows easy insertion and fixation of the string, enabling convenient winding and secure fastening without permanent attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the string is permanently fixed to the string fastening device, then the fastening is secure and reliable, but the string cannot be separated and the mounting operation is inconvenient
Solution Approach 1:
The string fastening device is divided into separable components: the base with hole, the bobbin for winding, and the string suspension member. This segmentation allows the string to be securely held during use while enabling easy separation and reinstallation of components.
Solution Approach 2:
The string suspension member incorporates elastic elements that provide dynamic adjustment capability. The elastic body can deform to accommodate string insertion and then restore to maintain secure fastening, allowing the system to transition between insertion and retention states.
2Adaptability or versatility
If the string is already installed in the string fastening device, then the product is ready to use, but the string fastening device cannot be easily separated from the string
Solution Approach 1:
The string suspension member acts as an intermediary between the string and the base. It provides a mechanical interface that secures the string during operation but allows for easy release and reinstallation, enabling the device to be sold pre-assembled while maintaining separability.
Solution Approach 2:
The elastic body in the string suspension member changes its physical state between deformed and restored conditions. When deformed, it allows string insertion; when restored, it secures the string firmly, providing both ease of installation and secure fastening.
3Ease of manufacture
If the string fastening device uses a simple hole structure, then the device is simple and easy to manufacture, but the string cannot be securely maintained in place
Solution Approach 1:
The string suspension member with elastic body provides self-service functionality by automatically securing the string through elastic restoration. The elastic element deforms during insertion and then self-restores to clamp the string, eliminating the need for complex fastening mechanisms while ensuring reliable retention.
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 allows for easy installation and use of the string fastening device in various products, enhancing usability and merchantability by allowing the string to be easily fixed and released, improving user convenience and product versatility.
Implementation Method 1
a string suspension member which is provided in the bobbin, is opened so that the string moves while the string is inserted, and maintains the string to be fixed when the string stops to move
Implementation Method 2
a one-direction rotational means in which the rotational member rotates only in one direction, that is, a winding direction when bobbin winds the string
Data Source
AI summary
A string fastening device which may be used for easily winding and fastening strings provided in shoes, bags, clothes, or the like is provided. The string fastening device includes a base; a fixation member coupled to the base to maintain state in which the bobbin is stored in the base; a rotational member coupled to the fixation member and rotating the bobbin; and a string suspension member provided in the bobbin and fixing a string.