Angled Knife Handle Reduces Wrist Strain
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Solution Overview
Problem
Standard knives are ergonomically challenging to use, leading to wrist strain and loss of control due to incorrect handle positioning, making them difficult to hold and pick up, especially when cutting in a horizontal position.
Innovation Solution
A knife design with a handle connected via a connecting member that fixes the handle at an angle between 24° and 46° relative to the horizontal surface of the knife blade, allowing for a more ergonomic grip and reduced wrist pressure during cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle is positioned horizontally relative to the blade, then the knife structure is simple, but the user experiences wrist strain and loses control during cutting
Solution Approach 1:
The patent changes the angular parameter of the handle relative to the blade from 0° (horizontal) to 45° (angled), transforming the ergonomic characteristics of the knife to reduce wrist strain and improve control during cutting operations
Solution Approach 2:
The patent introduces a connecting member as a separate component that joins the handle to the blade at a 45° angle, segmenting the knife into distinct functional parts that can be independently positioned and optimized for ergonomic performance
2Ease of operation
If the handle is positioned horizontally, then the manufacturing is simple, but the user experiences difficulty picking up the knife in natural position
Solution Approach 1:
The patent modifies the angular parameter of the handle from horizontal (0°) to angled (45°), enabling the knife to be picked up in a more natural, ergonomic position that aligns with the user's hand and wrist anatomy
3Ease of operation
If the handle is positioned horizontally, then the knife structure is simple, but the user experiences difficulty cutting while moving the knife horizontally
Solution Approach 1:
The patent changes the handle angle parameter from 0° to 45° relative to the blade, providing better control during horizontal cutting movements by aligning the handle with the natural motion trajectory of the user's hand and arm
Data Source
AI summary
A tool, such as a knife or a surgical instrument, is disclosed having a sharp edge, a first end and a second end. A connecting member connects the second end of the member with a handle, wherein the connecting member connects the handle at a fixed angle between 24° and 46° relative to the sharp edge of the member.