Twist-Lock Button Fastening Mechanism for Motor Impairment
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Solution Overview
Problem
Standard fasteners, such as snaps, buttons, zippers, and hook-and-loop systems, are unreliable in extreme conditions and difficult for individuals with fine motor skill challenges, requiring a durable, secure, and jam-proof solution that is easy to use for all abilities.
Innovation Solution
A twist-lock button system comprising a handle, locking portion, negative, and button adapter, where the locking portion rotates into a cylindrical interior cavity to secure articles together, utilizing a raised ridge for a friction fit and thread holes for attachment, allowing easy operation and secure fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard fasteners (snaps, buttons, zippers, hook-and-loop) are used, then they are easy to manufacture and operate, but they are unreliable under heavy loads and extreme conditions
Solution Approach 1:
The fastener is divided into separate components: a button assembly with handle and locking portion, and a buttonhole assembly with negative and reinforcement. This segmentation allows each component to be optimized independently for reliability while maintaining ease of operation.
Solution Approach 2:
The locking portion is received into the interior cavity of the negative, creating a nested structure. The handle rotates within the buttonhole assembly, with the locking portion engaging inside the negative's cavity, providing secure fastening while maintaining a compact overall structure.
2Ease of operation
If standard fasteners are used, then they are simple in structure, but they are difficult for people with difficulty with fine motor skills to manipulate
Solution Approach 1:
The handle is designed to rotate freely within the buttonhole assembly, allowing users to manipulate it with larger, more deliberate movements rather than requiring precise fine motor skills. The dynamic rotation mechanism provides tactile feedback and easier control for users with motor challenges.
Solution Approach 2:
The locking portion automatically engages with the negative when the handle is rotated into position, eliminating the need for complex manual manipulation. The self-locking mechanism provides secure fastening through the rotation action alone, making it accessible to people with varying motor abilities.
3Reliability
If standard fasteners are used, then they are simple to operate, but they jam or fail at critical moments
Solution Approach 1:
The locking mechanism is extracted from the traditional button structure and integrated into the handle assembly. The locking portion is separated from the button face and positioned to engage with the negative inside the buttonhole, eliminating the jamming issue while maintaining simple operation.
Solution Approach 2:
The reinforcement element is pre-installed within the buttonhole assembly to prevent tearing or deformation during fastening. This beforehand strengthening prevents failure at critical moments while requiring no additional user action, maintaining operational simplicity.
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 twist-lock button provides a durable, secure, and jam-proof fastening system that is easy to use, suitable for various abilities, ensuring reliable attachment in extreme conditions and accommodating different user needs.
Implementation Method 1
The locking portion and the interior cavity rotate relative to each other into a locked position
Data Source
AI summary
A twist-lock button configured to securely fasten two articles together. Such a twist-lock button may have four pieces: a handle, a locking portion, a negative, and a button adapter. The negative attaches to an article by way of the button adapter. The locking portion attaches to the handle and passes through a button hole in the article to join with the negative by twisting 180 degrees, thereby fastening the two portions of the article together between the handle and the negative. This mechanism is more durable than hook and loop fasteners, more reliable than buttons and snaps, and less prone to jamming than zippers. In addition, the twist-lock button is easier to use for people with muscular or motor disabilities, such as cerebral palsy, ALS, stroke recoverees, and amputees.