Handheld Cutting Tool Blade Holder Rotation Mechanism
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Solution Overview
Problem
Handheld cutting tools often damage unintended materials due to blade penetration, and existing solutions require disposal of the entire tool when the blade becomes dull, as they have non-replaceable blades.
Innovation Solution
A handheld cutting tool with a blade holder that isolates unintended materials and allows for adjustable blade angles, using standard replaceable blades, and a rotation control assembly for enhanced safety and durability, enabling cutting with the blade edge or point while minimizing damage to adjacent materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a handheld cutting tool uses a standard replaceable blade that can penetrate materials, then cutting capability is improved, but damage to unintended materials occurs
Solution Approach 1:
A protective nosing is introduced as an intermediary element between the blade and the material being cut. This nosing isolates the blade from unintended materials, allowing the blade to cut through the target material while preventing it from damaging adjacent objects. The nosing acts as a mediator that enables the cutting function while blocking the harmful penetration path.
2Device complexity
If a handheld cutting tool has a non-replaceable blade, then structural simplicity is improved, but loss of the entire tool occurs when the blade becomes dull
Solution Approach 1:
The blade is segmented from the tool handle, allowing the blade to be replaced independently. The blade holder is designed as a separate component that can be easily detached or opened to replace the blade. This segmentation enables users to replace only the worn blade rather than discarding the entire tool, reducing waste and cost.
Solution Approach 2:
The blade is designed as a disposable component that can be easily discarded when dull, while the tool handle and blade holder are recovered and reused. The blade holder is designed with features such as a release mechanism or removable structure that allows for easy blade replacement without damaging the reusable portions of the tool.
3Reliability
If the blade holder exposes only the cutting edge, then safety is improved, but cutting versatility is reduced
Solution Approach 1:
The blade holder is designed with dynamic positioning capabilities, allowing it to rotate or adjust to different angles. This enables the user to expose the cutting edge for safe operation while also allowing the blade point to be positioned for versatile cutting tasks. The dynamic adjustment mechanism provides both safety and versatility by allowing the user to change the blade's operational orientation as needed.
Data Source
AI summary
Presented embodiments of the handheld cutting tool are capable of cutting in one of two ways: with the cutting edge of the blade only so as to minimize damage to objects not intended to be cut or, alternately, with the point of the blade as with more typical knives. The tool is comprised predominantly of a handle body, a blade holder and a rotational control assembly for allowing the blade holder to rotate. The blade holder holds either a replaceable isosceles trapezoid utility blade or replaceable single edge razor blade and has, in some embodiments, a portion that isolates parts of the blade from objects not intended to be cut. The rotational control assembly enables the blade holder to rotate between retracted and a plurality of extended positions thus permitting the blade holder to deploy the blade at various angles to facilitate proper cutting of materials.