Cutting device
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Solution Overview
Problem
Conventional auto-retract configurations for scrapers require non-constant, variable force to maintain the blade extended, leading to user fatigue and discomfort due to uneven load application.
Innovation Solution
A cutting device with a housing and a cutting assembly that includes an actuating member and two urging members, where the first urging member extends the cutting assembly and the second urges it to retract, allowing the actuating member to be moved between extended and retracted positions using a mechanism with recesses and protrusions to manage the forces applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional auto-retract configuration is used, then the blade automatically retracts for safety, but variable force is required to maintain extension causing user fatigue
Solution Approach 1:
The patent applies the dynamics principle by making the urging force adjustable rather than fixed. The spring mechanism allows the urging force to be modified based on operational needs, enabling the device to adapt between automatic retraction mode (higher safety) and manual extension mode (lower user fatigue). This is achieved through a adjustable urging member that can be positioned at different locations along the slider's path.
Solution Approach 2:
The patent implements parameter changes by allowing the urging force magnitude to be varied. The spring constant or pre-load of the urging member can be adjusted to change the force characteristics. This enables the system to operate in different modes: with higher urging force for automatic retraction and with lower urging force to reduce the effort needed to maintain blade extension during use.
2Stability of the object's composition
If constant force is applied to the slider to keep the blade extended, then the blade remains stable in position, but the user experiences fatigue and discomfort
Solution Approach 1:
The patent applies the self-service principle by designing the urging member to automatically maintain the blade in the extended position without requiring continuous user effort. The spring mechanism provides a self-regulating urging force that keeps the slider engaged with the locking feature, allowing the blade to remain stable while minimizing the force the user must continuously apply.
Solution Approach 2:
The system uses dynamics to create a balanced state where the urging force from the spring counteracts the retraction tendency, allowing the blade to remain stably extended with minimal user input. The adjustable nature of the urging force allows optimization between stability and user comfort by positioning the urging member to work with the natural scraping forces rather than against them.
3Productivity
If a non-constant force is applied during scraping operations, then effective scraping is achieved, but the slider experiences uneven loading
Solution Approach 1:
The patent addresses this contradiction by making the urging force parameter adjustable. The urging member can be positioned at different locations along the slider's travel path to optimize the force application point. This allows the system to accommodate the non-constant forces generated during scraping operations while maintaining slider stability and reducing uneven loading through strategic positioning of the force application point.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces user fatigue by allowing the cutting device to be maintained in an extended position with a smaller inward force, automatically retracting when not in use, thus enhancing safety and comfort during operation.
Implementation Method 1
a first urging member that is configured to urge the actuating member away from the body member, from an inner position toward an outer position relative to the body member, by applying a first urging force
Implementation Method 2
a second urging member that is configured to urge the cutting assembly to retract within the housing by applying a second urging force that urges the actuating member to move from an extended position toward a retracted position relative to the housing
Data Source
AI summary
A cutting device is disclosed. The cutting device has a housing, a cutting assembly that is movably disposed in the housing, the cutting assembly including a body member, an actuating member, and a first urging member that is configured to urge the actuating member away from the body member, from an inner position toward an outer position relative to the body member, by applying a first urging force, and a second urging member that is configured to urge the cutting assembly to retract within the housing by applying a second urging force that urges the actuating member to move from an extended position toward a retracted position relative to the housing. The housing includes at least one recess.