Dual Head Guard Knife Movable Cover Mechanism
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Solution Overview
Problem
Existing tools with multiple components pose a significant risk of injury due to loose sharp objects contaminating food or causing injuries, and existing safety solutions fail to effectively address the issue of multiple tool components in a single tool.
Innovation Solution
A tool design featuring a blade holder with a movable cover that rotates to expose one cutting edge at a time, biased to default to a covered position, and can be locked to prevent accidental exposure, reducing the risk of injury and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a guard or shield is added to cover the blade, then user safety is improved, but device complexity increases
Solution Approach 1:
The guard is merged with the blade assembly to form an integrated safety mechanism. The guard rotates together with the blade assembly around the pivot, combining the protective function with the cutting mechanism rather than being a separate independent component.
Solution Approach 2:
The guard serves multiple functions: it covers the blade edge when not in use to prevent injury, allows selective exposure of cutting edges through rotation, and works with the spring mechanism to provide automatic safety engagement. This multi-functionality reduces the need for additional separate safety components.
2Productivity
If multiple cutting edges are included in a single tool, then productivity is improved, but the risk of injury from loose sharp objects increases
Solution Approach 1:
The blade assembly is segmented into multiple cutting edges (first and second cutting edges) that can be selectively exposed. The guard divides its coverage to allow exposure of one cutting edge at a time while maintaining coverage of others, preventing loose sharp objects from causing injury while preserving multiple cutting functions.
Solution Approach 2:
The blade assembly and guard are designed to rotate dynamically around a pivot point. This dynamic mechanism allows the user to selectively expose only the required cutting edge for the current task while the guard automatically covers the other cutting edges, reducing the risk of injury from exposed sharp objects.
3Object-affected harmful factors
If a movable cover is added to alternatively expose cutting edges, then safety is improved, but ease of operation deteriorates
Solution Approach 1:
A spring mechanism provides a counterbalancing force to the movable guard. The spring is biased to hold the guard in a position that covers the cutting edges, and the user must overcome this spring force to rotate the guard and expose the cutting edge needed for operation. This creates a controlled, deliberate action that maintains safety while enabling operation.
Data Source
AI summary
Contemplated tool and tool cartridge assemblies are provided that include at least one tool component and a movable cover. The movable cover has at least one guard portion that moves to cover or expose at least one tool component to protect a user from injury. Contemplated movable covers could be biased to cover tool components, and can be moved by a user or work piece as needed.