Winged Cutter With Protrusion to Prevent Material Catching and Wedging
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Solution Overview
Problem
Existing hand-held cutting tools often cause thin materials to catch or wedge at acute intersection points between the cutting edge and the channel, and they lack versatility to efficiently cut different types of materials, such as films and thicker materials like cardboard, while also lacking structural integrity and gripability.
Innovation Solution
A hand-held cutting tool with a handle and dual cutting heads, each having a channel with a cutting edge and a protrusion to redirect items laterally, and featuring long and short wing portions of different shapes to accommodate various materials, along with a reinforced distal end for improved grip and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple channel structure is used, then the device complexity is reduced, but materials catch or wedge at acute intersection points between the cutting edge and channel
Solution Approach 1:
The protrusion is positioned upstream in the channel to redirect the material before it reaches the cutting edge, preventing the material from contacting the acute intersection point where wedging would occur. This preliminary redirection action eliminates the harmful effect before it can manifest.
Solution Approach 2:
The protrusion acts as an intermediary element between the material and the cutting edge, intercepting and redirecting the material flow. This intermediary structure prevents direct contact between the material and the problematic acute intersection point, thereby eliminating material catching without requiring complete redesign of the channel.
2Device complexity
If a single cutting head is used, then the device complexity is reduced, but the versatility to cut different types of materials is limited
Solution Approach 1:
The cutting tool incorporates multiple cutting heads with different channel geometries and protrusion configurations, enabling a single device to perform multiple cutting functions. Each cutting head is optimized for specific material types (e.g., thin film vs. thicker cardboard), providing universal applicability across different material thicknesses and types without requiring separate tools.
Solution Approach 2:
The cutting tool is divided into multiple independent cutting heads, each with its own channel and protrusion configuration. This segmentation allows each cutting head to be independently optimized for specific material types while maintaining them as integrated components of a single handheld tool, achieving versatility without excessive complexity.
3Ease of operation
If the distal end portion is made lighter, then the ease of operation is improved, but the structural integrity and durability are reduced
Solution Approach 1:
The distal end portion incorporates curved or rounded geometries rather than sharp angular transitions. This curvature distributes stress more evenly throughout the structure, maintaining structural integrity and durability while creating a more ergonomic shape that is comfortable to hold and operate, thus resolving the contradiction between strength and ease of operation.
Data Source
AI summary
A hand-held cutting tool includes a handle and one or more embedded blade cutters at a distal end portion of the handle, the cutter(s) each having a channel within which a blade with a cutting edge is secured/held, one of the channels including a protrusion shaped to laterally redirect an item to be cut in relation to a side wall of the channel and/or being provided in part by a wing portion of the cutting tool.