Movable Knife Blade Cover Dynamics for Safety
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Solution Overview
Problem
Users face the risk of cutting their fingers or other body parts when using knives to cut food, and existing solutions like metal gloves or finger guards reduce control and feel while cutting.
Innovation Solution
A movable knife blade cover that covers the cutting edge and upper spine of the blade, connected to a biasing device which moves away from the cutting edge when the knife is in use, allowing for safe cutting without compromising control or feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal gloves or finger guards are worn to protect fingers, then safety is improved, but control and feel of the knife are reduced
Solution Approach 1:
The blade cover is designed to be movable rather than fixed, allowing it to dynamically adjust its position. It automatically moves away from the cutting edge when the knife is in use and returns to cover the blade when not in use, providing safety only when needed without interfering with cutting control
Solution Approach 2:
The blade cover system is self-regulating through the biasing device that automatically pushes the cover away from the blade during cutting and allows it to return when cutting force is removed, eliminating the need for manual operation while maintaining both safety and control
2Reliability
If a blade cover is used to protect fingers, then safety is improved, but control and feel during cutting are reduced
Solution Approach 1:
The blade cover transitions between two states: covering the blade when stored and moving away from the cutting edge during use. This dynamic behavior ensures the cover provides protection when the knife is not in use but does not interfere with control and feel during actual cutting operations
Solution Approach 2:
The biasing device pre-positions the blade cover in a protective state and automatically activates the movement away from the blade when cutting force is applied, preventing the cover from interfering with cutting control before the issue arises
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The movable blade cover effectively protects fingers from the blade while maintaining control and feel during cutting, providing enhanced safety for users, especially children and those learning to use knives.
Implementation Method 1
a biasing device operative to bias the blade cover away from the blade
Data Source
AI summary
An apparatus is provided that includes a knife and blade cover. The knife includes a handle and a blade. The handle is attached to the blade. The blade includes a cutting edge, a cheek, and an upper spine. The cheek extends between the cutting edge and the upper spine. The apparatus further includes a blade cover. The blade cover covers opposite sides of the cutting edge of the blade. The blade cover covers at least a portion of the upper spine in a stowed position. The apparatus further includes a biasing device. The biasing device is in operative connection with the knife and the blade cover. The biasing device is operative to bias the blade cover down against the upper spine in the stowed position. The blade is in operative connection with the knife. The blade cover is operative to move relative to the blade in a direction away from the cutting edge when the blade cuts an object to enable the blade to cut the object.