Ergonomic Handle Curvature for Comfortable Large-Hand Grip
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Solution Overview
Problem
Conventional handles for containers and implements are often thin, difficult to grasp, and uncomfortable for users, especially those with larger hands, and can exacerbate joint conditions like arthritis due to unnatural gripping contortions.
Innovation Solution
An ergonomic handle with a combination of convex and concave curvatures mimicking hand geometries, providing ample room for large hands, a thumb rest, and a stable design that accommodates various materials, including ceramic, while maintaining structural integrity and ease of cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional thin handles are used, then manufacturing is simple and material usage is low, but ease of operation deteriorates due to difficulty in grasping and discomfort for users with larger hands
Solution Approach 1:
The handle incorporates convex and concave curvatures that mimic the natural geometry of a human hand, creating an ergonomic shape that fits comfortably in the palm and between the fingers. This curved design resolves the contradiction by making the handle easier to grasp without requiring complex mechanical structures.
Solution Approach 2:
The handle dimensions are specifically optimized with a diameter of 1.5-2.5 cm and length of 7-10 cm, derived from hand dimensional data. These parameter changes enable comfortable gripping for users with larger hands while maintaining manufacturing simplicity through standardized ceramic forming processes.
2Ease of operation
If handle diameter is increased to accommodate larger hands, then ease of operation improves, but manufacturing reliability deteriorates due to ceramic thickness constraints
Solution Approach 1:
The handle cross-section is segmented into convex and concave regions, creating an I-shaped or C-shaped profile. This segmentation allows the handle to achieve a larger effective diameter (1.5-2.5 cm) for comfortable gripping while keeping the actual ceramic material thickness within the safe 1.5 cm limit, preventing cracking during firing.
Solution Approach 2:
The handle design transitions from a simple circular cross-section to a multi-dimensional I-shaped or C-shaped cross-section with convex and concave regions. This dimensional change enables the handle to provide ample gripping space for large hands while maintaining thin ceramic walls that satisfy manufacturing constraints and prevent structural failure.
3Ease of operation
If ergonomic curvatures are added to mimic hand geometry, then ease of operation improves, but manufacturing complexity increases
Solution Approach 1:
The ergonomic curvatures are achieved by optimizing specific dimensional parameters (diameter 1.5-2.5 cm, length 7-10 cm, convex/concave radii) rather than through complex multi-step manufacturing processes. These parameter changes enable ergonomic comfort to be achieved through standard ceramic forming and firing techniques.
Solution Approach 2:
The convex and concave curvature design serves multiple functions simultaneously: it mimics hand geometry for ergonomic comfort, provides structural integrity within ceramic thickness constraints, and can be manufactured using standard ceramic forming processes. This multi-functionality resolves the contradiction by achieving ergonomic benefits without proportionally increasing manufacturing complexity.
4Ease of operation
If handle length is increased to provide more gripping room, then ease of operation improves, but weight increases
Solution Approach 1:
The handle length is optimized to 7-10 cm, providing sufficient gripping room for users with larger hands while limiting the overall size to control weight. This parameter optimization resolves the contradiction by achieving adequate grip space without excessive weight gain.
Solution Approach 2:
The handle length is effectively segmented into functional zones: a grip region (7-10 cm) for hand placement and a connection region for attachment to the container. This segmentation allows the grip portion to be long enough for comfort while keeping the overall handle weight manageable through efficient material distribution.
Data Source
AI summary
An ergonomic handle configuration has a larger diameter than known conventional handles. The handle is configured with a predetermined combination of convex and concave curvatures that combine in such a way as to mimic a curvature of a user's palm along an area of contact of the palm with the handle, as well as to mimic a curvature of a user's fingers when curled to grip the handle along an area of contact of the fingers with the handle, when a user grips the handle. In addition, implementations of the handle in combination with a container or implement can include a thumb rest that is specifically configured to engage a thumb of a user in a neutral posture thumb position when gripping the handle.