Ergonomic Tool Handle Geometry for Multi-Grip Torque Control
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Solution Overview
Problem
Existing hand tools often lack ergonomic designs that facilitate comfortable gripping and efficient manipulation, leading to user discomfort and reduced efficiency in various gripping scenarios.
Innovation Solution
A handle design with varying radii and cross-sectional shapes along its longitudinal length, allowing for different grip positions and facilitating comfortable gripping and efficient manipulation through optimized hand tool interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional uniform handle design is used, then the manufacturing process is simple, but the user comfort and gripping efficiency are reduced
Solution Approach 1:
The handle features varying radii at different longitudinal positions, creating different cross-sectional shapes (first radius at first position, second radius at second position, third radius at third position, fourth radius at fourth position) to provide optimized gripping surfaces for different hand positions and gripping styles, thereby improving user comfort and efficiency without requiring multiple separate components
Solution Approach 2:
The invention transitions from a uniform cylindrical handle to a multi-dimensional ergonomic design by varying the radial dimension along the longitudinal axis, creating an asymmetric profile with multiple radius variations that accommodate different gripping scenarios while maintaining a single integrated handle structure
2Adaptability or versatility
If a handle with varying radii is used, then different gripping styles are accommodated, but the manufacturing precision requirements increase
Solution Approach 1:
The handle is designed with specific radius variations at defined longitudinal positions (first radius at first position, second radius at second position, third radius at third position, fourth radius at fourth position) to create optimized gripping zones for different hand positions, providing adaptability for multiple gripping styles while maintaining manufacturability through a single integrated design
Solution Approach 2:
The handle geometry is optimized by varying the radial parameter along the longitudinal axis, creating a profile with multiple radius values at different positions that accommodates different gripping styles. The design specifies that the second radius is greater than the first radius, the third radius is less than the first radius, and the fourth radius is less than the third radius, providing ergonomic versatility without requiring excessive manufacturing precision
Data Source
AI summary
Various embodiments of a handle for tools, such as driving tools, such as screwdrivers, are provided. The embodiments shown and described herein include varying radii along the longitudinal axis of the handle, thereby facilitating the user interfacing with the handle, and thus also the tool, in different methods of use, such as quicker rotation, lower torque, and higher torque.