Motor-Operated Shears With Transverse Blade Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Motor-operated scissors often experience incomplete cutting due to material clamping between the cutting edges, preventing them from returning to the basic position, especially with spring or automatic motor return mechanisms.
Innovation Solution
The scissors are designed to act on the cutting edges transversely at the end of the cutting process to distance them from each other, allowing them to return to the basic position by eliminating the transverse action, and can be mounted on a common axle body that bends elastically to spread the cutting edges, forming an acute angle with the cutting plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting edges are designed to slide past each other in the cutting plane during the cutting process, then the cutting efficiency is improved, but material can become jammed between the blades preventing complete cutting and return to home position
Solution Approach 1:
The patent introduces a transverse dimension to the cutting edge motion. At the end of the cutting process, the cutting edges are acted upon in a direction perpendicular to the cutting plane, causing them to separate in this transverse dimension. This dimensional change prevents material from remaining clamped between the blades and enables reliable return to the home position, while maintaining the efficient sliding motion in the cutting plane during the actual cutting process.
2Ease of operation
If a standard spring return mechanism or motorized automatic return is used, then the blades can return to home position, but material jamming prevents the blades from returning
Solution Approach 1:
The patent applies the transverse separating action at the precise moment when the cutting process is complete. This preliminary action of separating the cutting edges in the transverse direction occurs before the return mechanism attempts to move the blades back to home position, eliminating the material jamming that would otherwise prevent successful return.
3Stability of the object's composition
If the cutting edges remain in contact over at least part of their length in the cutting plane, then cutting stability is improved, but material can become bound preventing blade separation
Solution Approach 1:
The patent creates a dynamic system where the cutting edges exhibit different behaviors at different stages of the cutting cycle. During the cutting process, the edges maintain stable contact in the cutting plane. At the end of the cutting process, the system dynamically transitions to apply transverse forces that separate the edges perpendicular to the cutting plane, enabling reliable return while maintaining cutting stability during operation.
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
This design ensures complete cutting results by preventing material clamping and allows for reliable return to the basic position, enhancing the functional reliability of motor-operated scissors.
Implementation Method 1
the scissors are mounted on a common axle body that bends elastically to spread the cutting edges
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
The invention relates to motor-operated shears (1) comprising two blades (2, 3) that can move towards each other to perform a shearing movement. In order to advantageously improve functional safety, towards the end of the movement, the blades (2, 3) are acted upon in a direction running transversely to the movement so as to keep the blades (2, 3) at a distance from one another in said direction.