Pivoting Hand Tool Handle for Variable Angle Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hand tools, such as fingernail and toe nail clippers, are difficult for elderly, arthritic individuals, and stroke victims to use due to the need for extensive dexterity and alignment, while surgical instruments with fixed configurations are inconvenient and costly to stock. Additionally, tools like wire and bolt cutters with fixed cutting edges struggle in confined spaces.
Innovation Solution
A hand tool with a handle assembly oriented in a y-axis plane, featuring a smooth arcuate shape and pivotally linked handle members with heim joints, allowing for 180° rotational and tilting movement, enabling easy manipulation and variable angle of attack, and a detachable tool head for different applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional nail clippers with fixed handle and lever alignment are used, then cutting efficiency is improved, but ease of operation deteriorates for individuals with limited dexterity
Solution Approach 1:
The patent applies the dynamics principle by making the cutting edges movable relative to the handle assembly through a pivot mechanism. The cutting edges can rotate about a pivot axis, allowing them to move from an inoperative position away from the nail to an operative position where they contact the nail for cutting. This dynamic adjustment enables users with limited dexterity to operate the clipper without requiring precise alignment of fixed components.
2Measurement precision
If surgical instruments with fixed configurations are used, then functional precision for specific tasks is improved, but adaptability deteriorates requiring multiple instruments
Solution Approach 1:
The patent implements dynamics by enabling the cutting edges to rotate between different positions. The cutting edges can be positioned at various angles relative to the handle assembly, allowing the same instrument to perform different cutting tasks. This dynamic repositioning provides the adaptability of multiple instruments while maintaining the precision of a well-designed single tool.
Solution Approach 2:
The patent applies universality by designing a single hand tool that can perform multiple functions through the movable cutting edges. By rotating the cutting edges to different positions, the instrument can accommodate various cutting requirements, eliminating the need to stock multiple specialized surgical instruments with different fixed configurations.
3Stability of the object's composition
If wire and bolt cutters with permanent fixed cutting edge orientation are used, then structural stability is improved, but ease of operation in confined spaces deteriorates
Solution Approach 1:
The patent resolves this contradiction by making the cutting edges dynamically adjustable through rotation about a pivot axis. The cutting edges maintain a stable connection to the handle assembly via the pivot mechanism, ensuring structural stability.同时, they can be rotated to different orientations to access confined spaces and perform cutting operations from various angles, greatly improving ease of operation in restricted environments.
Data Source
AI summary
A work tool includes a tool handle assembly that is moveable between an open default position and a closed working position. The tool handle assembly is constructed with an upper tool handle assembly and a lower tool handle assembly where the upper tool handle assembly and the lower tool handle assembly are configured to be snap-fit together to enable pivotal movement between the upper tool handle assembly and the lower tool handle assembly. The tool handle assembly further includes an attack angle orientation assembly carried partially by the upper tool handle assembly and carried partially by the lower tool handle assembly to facilitate pivotally closing a pair of cutting blades to operate on a work piece; the cutting blades are carried into alignment with a cutting blade plane defined by an imaginary cutting plane line extending between proximal end portions of the upper tool handle assembly and the lower tool handle assembly to prevent the pair of cutting blades from over-cutting a work piece beyond the cutting blade plane. The tool handle assembly further includes a biasing member which is secured between the upper tool handle assembly and the lower tool handle assembly in order to bias the tool handle assembly to an open default position and in order to bias the pair of cutting blades into an object receiving open position.