Rotating Cover Cutting Device with Integrated Recessed Safety Cap
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Solution Overview
Problem
Craft knives, such as pen cutters, often have exposed blades due to inconvenient safety caps that are easily lost or not easily replaced, leading to increased risk of accidental cuts and injuries.
Innovation Solution
A cutting device with a movably disposed cover member that can be easily locked and unlocked by rotating the cover along a recessed path, preventing the blade from being unnecessarily exposed and reducing the risk of injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a detachable safety cap is used to cover the blade, then safety is improved when the cutter is not in use, but the cap becomes easily lost or separated during use
Solution Approach 1:
The safety cap is merged with the handle by providing a recess in the handle that receives a protrusion on the cap, creating an integrated assembly where the cap cannot be lost separately. This resolves the contradiction by maintaining safety coverage while preventing the cap from becoming detached and lost during use.
Solution Approach 2:
The cap is nested within the handle structure through the protrusion-recess relationship, where the cap fits into a dedicated receptacle in the handle. This nesting arrangement ensures the cap remains associated with the handle, eliminating the loss problem while maintaining blade coverage functionality.
2Object-affected harmful factors
If a detachable safety cap is used, then the blade can be covered when not in use, but it is inconvenient to replace the cap each time the cutter is used
Solution Approach 1:
By merging the cap replacement operation with blade replacement through the integrated protrusion-recess design, the system eliminates the need for separate cap replacement. When the blade is replaced, the cap remains in place on the handle, significantly reducing the time and steps required compared to detached cap systems.
Solution Approach 2:
The cap is preliminarily positioned on the handle in a fixed location that remains constant regardless of blade changes. This preliminary placement eliminates the need to re-attach or re-position the cap during subsequent blade replacements, saving time and effort.
3Object-affected harmful factors
If the cap is permanently attached to the handle, then the blade remains covered for safety, but the blade cannot be accessed for use
Solution Approach 1:
The system transitions from a static permanently-attached cap to a dynamic configuration where the cap remains fixed on the handle while the blade becomes replaceable. This dynamic arrangement allows the blade to be accessed for use by simply removing and replacing the blade, while the cap maintains its protective position on the handle.
Solution Approach 2:
The cutting device is segmented into three distinct components: the handle with integrated cap, the removable blade, and the protrusion-recess connection mechanism. This segmentation allows independent replacement of the blade while the cap remains permanently positioned on the handle, achieving both safety and accessibility.
Data Source
AI summary
A cutting device is disclosed. The cutting device has a body member, a cutting member that is removably attachable to the body member, and a cover member that is movably disposed on the body member, the cover member including a protrusion. The body member has a recess configured to receive the protrusion. The recess includes a first portion extending in a first direction and a second portion extending in a second direction that is different from the first direction.