Motorized Cutting Tool Assembly with Force Limitation
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Solution Overview
Problem
Safety scissors are difficult for children, especially young children, to effectively cut and form designs in various materials, making them frustrating to use.
Innovation Solution
A cutting and forming tool assembly with a drive assembly and shaft assembly contained within a housing, featuring a cutting tool and an underlying board, allowing for easy use and facilitating the cutting or forming of various designs, including a drive shaft with a tip that protrudes from the housing and a force limitation mechanism to control the cutting force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional safety scissors are used, then safety is maintained, but cutting effectiveness and ease of operation deteriorate
Solution Approach 1:
The patent replaces the simple mechanical scissor mechanism with an electric motor-driven shaft assembly that rotates at controlled speeds. The motorized system substitutes manual blade coordination with automated rotational cutting action, making operation easier for children while significantly improving cutting effectiveness through consistent high-speed rotation.
Solution Approach 2:
The cutting tool incorporates variable speed control allowing the shaft to rotate at different speeds depending on the material being cut. This dynamic adjustment optimizes cutting performance for different materials (paper, cloth, metal foil) while maintaining ease of operation through a simple speed control mechanism.
2Productivity
If cutting force is increased to improve cutting effectiveness, then productivity improves, but safety and control deteriorate
Solution Approach 1:
The patent incorporates a force limitation mechanism that provides feedback control on the cutting force. The mechanism monitors and regulates the force applied by the rotating shaft, automatically adjusting to prevent excessive force that could cause safety issues while maintaining sufficient cutting effectiveness for various materials.
Solution Approach 2:
The system controls cutting force by adjusting rotational speed parameters rather than directly controlling mechanical force. By varying the rotation speed of the shaft according to material type, the system achieves effective cutting while maintaining safe, controlled force levels through parameter optimization rather than brute force.
Data Source
AI summary
A cutting and forming tool assembly is disclosed that cuts and forms many types of material while remaining easy to use. The tool assembly may include a cutting or forming and an underlying board. The cutting and forming tool has a drive assembly and a shaft assembly contained within a housing. The shaft assembly of the tool assembly reciprocates and at least partially rotates during each reciprocating motion. The housing may be of various shapes and configurations, such as for example egg-shaped, computer mouse-shaped, or pen-shaped. The drive shaft contains a tip that protrudes from an opening in a lower portion of the housing during at least a portion of a downward stroke of the shaft assembly.