Knife Blade Indentation for Chopping Control
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Solution Overview
Problem
Conventional knives are difficult to control, especially when chopping delicate items like chives or herbs, due to their design lacking features that enhance user grip and control during precise cutting motions.
Innovation Solution
A knife with a blade featuring indentations on both the upper edge and handle, allowing for improved hand engagement and control, where the upper edge indentation is strategically positioned near the pivot point for enhanced chopping precision and safety, with a curved and concave cross-section for thumb or finger engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional knife design is used, then the knife structure is simple, but the control precision during chopping is poor
Solution Approach 1:
The patent applies local quality by creating indentations at specific locations on the knife blade and handle. The blade includes an indentation on its upper surface and the handle includes an indentation on its upper surface, allowing localized hand engagement points that improve control precision without requiring complex structural changes throughout the entire knife.
Solution Approach 2:
The patent utilizes curvature by forming concave indentations with curved cross-sections on both the blade and handle. The indentation on the blade has a curved cross-section that matches the contour of a user's finger, and the handle indentation is concave with a curved cross-section, providing ergonomic engagement surfaces that enhance control.
2Object-affected harmful factors
If the upper edge of the blade is made sharp for cutting, then cutting performance is improved, but safety during hand engagement is reduced
Solution Approach 1:
The patent segments the blade upper surface into distinct regions: a sharp lower edge for cutting and a blunt upper edge with an indentation for hand engagement. This segmentation allows the blade to have both cutting sharpness and safety features, as the sharp edge is isolated from the hand contact area.
Solution Approach 2:
The indentation on the blade upper surface acts as an intermediary structure between the sharp cutting edge and the user's hand. It provides a blunt, safe contact point that mediates the interaction, allowing hand engagement without direct contact with the sharp edge, thus ensuring safety while maintaining cutting performance.
Data Source
AI summary
A knife (10) having a body (16) with a handle (14) and a blade (12), the blade having two sides (22), an upper edge (18) and a sharp lower edge (20) for cutting, the body having an upper side which includes at least two indentations (42, 48) which are spaced apart from one another, wherein at least one of the indentations is formed in the upper edge of the blade.