Nested-Handle Cutting Tool for Compact Motor-Assisted Operation
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Solution Overview
Problem
Conventional cutting tools are often bulky and ergonomically inconvenient, requiring frequent application of cutting force and lacking ergonomic design suitable for common users.
Innovation Solution
A cutting tool design featuring a top and bottom blade with a first handle partially enclosed by a second handle, housing the drive unit within the second handle to reduce dimensions, and incorporating a motor-assisted cutting mechanism for ergonomic ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the drive unit components are arranged on the first handle member as proposed in the reference, then the cutting tool can provide motor-assisted cutting function, but the cutting tool becomes bulky and ergonomically inconvenient
Solution Approach 1:
The first handle is nested within the second handle, with the second handle enclosing the first handle in the closed position. This nesting arrangement allows the drive unit components to be compactly integrated within the handle structure, reducing the overall volume of the cutting tool while maintaining the motor-assisted cutting function.
Solution Approach 2:
The invention repositions the drive unit components from a linear arrangement on the first handle to a three-dimensional integration within the second handle's internal space. By utilizing the vertical and radial dimensions within the handle structure, the design achieves compact integration without compromising the automated cutting function.
2Device complexity
If the cutting tool is designed with conventional handle arrangement, then the structure is simple, but the tool is ergonomically inconvenient and bulky
Solution Approach 1:
The first handle is nested within the second handle, creating a compact dual-handle structure that improves ergonomics. The enclosing arrangement allows the user's hand to be positioned closer to the pivot point while maintaining a manageable tool size, significantly improving ease of operation without excessive structural complexity.
3Device complexity
If the second handle does not enclose the first handle, then the handle structure is simpler, but the cutting tool is more vulnerable to obstacles in bushes and trees
Solution Approach 1:
The second handle encloses the first handle, creating a protective housing that shields the internal components and mechanism from obstacles in bushes and trees. This enclosing structure provides mechanical protection without significantly increasing structural complexity, as the handles are integrated in a nested configuration.
4Ease of operation
If the user's hand is positioned far from the pivot point, then the handling is easier, but users with small hands cannot operate the tool easily
Solution Approach 1:
The nested handle arrangement allows the user's hand to be positioned closer to the pivot point while maintaining proper leverage. The enclosing second handle provides a comfortable grip surface that accommodates different hand sizes, improving both handling ease and adaptability to various users including those with small hands.
Data Source
AI summary
A cutting tool (100) includes a top blade (102) and a bottom blade (104). The bottom blade (104) is pivotally coupled to the top blade (102). The top blade (102) and the bottom blade (104) together perform a cutting action on an object place between them. A first handle (108) is operatively coupled with the top blade (102). The first handle (108) defines a front portion (109) and a back portion (111). A second handle (110) is operatively coupled with the bottom blade (104). The cutting tool (100) is characterized in that in closed position of the cutting tool (100), at least a part of the second handle (110) at least partially encloses the back portion (111) of the first handle (108).