Cutting Tool Extension Component Positioning
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Solution Overview
Problem
Conventional cutting tools with a circular plate or rolling preventive plate attached to the first handle obstruct the cutting operation, making it difficult for operators to cut materials easily when using both handles.
Innovation Solution
A cutting tool design where a sidewardly-protruding extension component on the first handle can be freely positioned between transverse and longitudinal orientations, allowing stable setting and easy gripping, enabling the operator to grasp only the second handle for cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a circular plate or rolling preventive plate is attached to the front end side of the first handle, then the operator can set the first handle stably by pushing it down with his/her foot, but the plate constitutes an obstruction to cutting operation when grasping both handles with hands
Solution Approach 1:
The extension component is designed to be movable relative to the handle main body, allowing it to switch between a transverse position (for stable foot-operated setting) and a longitudinal position (aligned with the handle axis). This dynamic reconfiguration enables the component to serve different functions depending on the operational mode, eliminating the obstruction problem while maintaining stability when needed.
Solution Approach 2:
The extension component changes its spatial orientation from extending transversely (perpendicular to handle axis) to extending longitudinally (parallel to handle axis). This dimensional change in orientation allows the component to move from an obstructive position to a non-obstructive position, enabling smooth cutting operation when both handles are grasped with hands.
2Stability of the object's composition
If the extension component is positioned in the transverse position for stable setting, then the first handle can be set stably by foot, but the cutting operation becomes obstructed
Solution Approach 1:
The extension component transitions from a fixed transverse position to a movable configuration that can switch between transverse and longitudinal positions. This dynamic capability allows the operator to select the appropriate position based on the cutting task: transverse position for stable foot-operated setting, and longitudinal position for efficient hand-operated cutting, thereby eliminating the trade-off between stability and productivity.
3Ease of operation
If the extension component is repositioned to the longitudinal position, then the obstruction to cutting operation is eliminated, but the stable setting function may be compromised
Solution Approach 1:
The extension component is designed with movable connection mechanisms (such as pivots or sliding joints) that allow it to switch between longitudinal and transverse positions. When in the longitudinal position, it aligns with the handle axis and does not obstruct cutting operation. When needed for stable setting, it can be repositioned to the transverse position, maintaining both ease of operation and stability through dynamic reconfiguration.
Data Source
Figure 1(a)~1(b)
Figure 2
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AI summary
Provided is a cutting tool with which an operator can cut a to-be-cut material by grasping a second handle while setting a first handle stably, and in which the first handle can be changed from a stably-set mode to a grippable mode as with the second handle. The cutting tool has a sidewardly-protruding extension component (29) disposed at the base end of the first handle (5), which is installed so that, with respect to a handle main body (11) of the first handle (5), it can be freely changed between a transverse position (X) substantially aligned with the axial direction of the pivotal shaft (17) and a longitudinal position (Y) aligned with the lengthwise direction of the handle main body, and, a position holding mechanism (45) is disposed between the extension component (29) and the handle main body (11), for holding the extension component (29) in each position (X,Y).