Adjustable Hand Tool with Heim Joint for Limited Dexterity
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Solution Overview
Problem
Conventional hand tools, such as nail clippers and surgical instruments, are difficult for elderly, arthritic individuals, and those with limited arm, wrist, and hand movement to use due to requirements for extensive dexterity and alignment, while tools like cable and bolt cutters with fixed configurations struggle in confined spaces.
Innovation Solution
A hand tool design featuring a contoured handle assembly with a resilient biasing member and heim joint coupler assembly, allowing for multi-directional movement and adjustable tool head assemblies, enabling easier operation and versatility in various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional hand tools with fixed configurations are used, then structural simplicity is maintained, but ease of operation deteriorates for individuals with limited dexterity
Solution Approach 1:
The tool head assembly is made dynamically adjustable through a ball and socket joint mechanism, allowing it to pivot and rotate to multiple orientations. This enables the cutting edges to be positioned at different angles relative to the handle assembly, making the tool adaptable to various nail positions and user capabilities without requiring complex manual manipulation.
Solution Approach 2:
The tool is designed with universal applicability by incorporating an adjustable tool head that can perform multiple cutting orientations. A single tool can now accommodate different nail clipping scenarios (fingernails, toenails, different angles) that previously would have required multiple specialized tools, thereby improving ease of operation across diverse user needs.
2Adaptability or versatility
If cutting edges are fixed in permanent orientation, then device complexity is reduced, but adaptability to different cutting positions deteriorates
Solution Approach 1:
The tool head assembly incorporates a ball and socket joint that enables dynamic adjustment of the cutting edge orientation. The tool head can pivot on a first axis and rotate on a second axis, allowing the cutting edges to be positioned at various angles relative to the handle assembly. This dynamic adjustability provides adaptability to different cutting positions without requiring multiple fixed-configuration tools.
Solution Approach 2:
The tool is segmented into distinct functional components: a handle assembly and a separately adjustable tool head assembly. This segmentation allows the tool head to be independently positioned and oriented relative to the handle, providing adaptability while maintaining relative structural simplicity through modular design.
3Ease of operation
If extensive manipulation of handle and lever is required for alignment, then cutting precision is improved, but ease of operation deteriorates for individuals with limited movement
Solution Approach 1:
Instead of requiring extensive manual manipulation to achieve alignment, the invention provides dynamic adjustability through a ball and socket joint mechanism. The tool head can be easily positioned and locked at various orientations with minimal manipulation, maintaining alignment precision while dramatically improving ease of operation for individuals with limited dexterity and range of motion.
Solution Approach 2:
The tool incorporates a spring-loaded mechanism that automatically returns the tool head to its neutral position after adjustment. This self-service feature reduces the manipulation effort required, as the spring assists in maintaining proper alignment without requiring extensive manual intervention from the user.
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 design facilitates easier and more convenient use by individuals with limited dexterity and accommodates different surgical and cutting functions without the need for extensive alignment or adjustment, improving usability and reducing operational complexity.
Implementation Method 1
a resilient biasing member, allowing for multi-directional movement
Implementation Method 2
heim joint coupler assembly, allowing for multi-directional movement
Data Source
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AI summary
A work tool comprises: a handle assembly moveable between an open default position and a closed working position and having an upper handle assembly and a lower handle assembly; an attack angle orientation assembly carried partially by said upper handle assembly and carried partially by said lower handle assembly to facilitate pivotally closing a pair of cutting blades at a desired attack angle; and a biasing member secured between said upper handle assembly and said lower handle assembly for biasing said handle assembly to the open default position. The said upper handle assembly and said lower handle assembly are configured to be snap-fit together to enable pivotal movement between said upper handle assembly and said lower handle assembly. The cutting blades are carried into alignment with a cutting blade plane, said cutting plane extending between proximal end portions of said upper handle assembly and said lower handle assembly to prevent said pair of cutting blades from operating on a work piece beyond the cutting blade plane.