Scissors Handle With Flexible Inner Ring and Membrane
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing scissors with flexible inner rings face challenges in balancing comfort and grip, as too soft materials compromise hold while too rigid materials reduce comfort, and mechanical adaptations often lead to unnecessary complexity and inaccuracies.
Innovation Solution
Scissors with flexible rings featuring a tubular inner part and a thin membrane-like part connecting to a rigid outer ring, allowing multidirectional orientation and adaptability while maintaining a simple structure, achieved through molding and secure attachment techniques like overmoulding or welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible inner ring is made of too soft a material, then comfort is improved, but the hold is weakened
Solution Approach 1:
The flexible inner ring is segmented into a tubular inner part and a thin membrane-like part connecting it to the rigid outer ring. This segmentation allows the tubular part to provide comfort through flexibility while the membrane connection to the rigid outer ring maintains adequate hold and structural integrity.
Solution Approach 2:
The handle combines a rigid outer ring (likely metal or rigid synthetic) with a flexible inner ring made of elastically deformable material. This composite structure allows the rigid outer ring to provide structural strength and hold, while the flexible inner ring provides comfort and adaptability to finger morphology.
2Strength
If the flexible inner ring is made of too rigid a material, then the hold is improved, but comfort is reduced
Solution Approach 1:
The flexible inner ring is divided into a tubular inner part that contacts the finger (提供 comfort) and a thin membrane-like part that connects to the rigid outer ring (提供 hold). This segmentation allows each part to optimize its function independently.
Solution Approach 2:
Different parts of the inner ring have different properties: the tubular inner part is designed for flexibility and comfort where it contacts the finger, while the membrane connection area provides structural support for hold. This local differentiation of properties resolves the contradiction between comfort and hold.
3Device complexity
If the flexible ring is directly attached to the rigid outer ring, then the structure is simplified, but the ring becomes very little deformable
Solution Approach 1:
The inner ring is segmented into a tubular part and a membrane-like connecting part. The membrane part acts as a flexible connector that maintains deformability while attaching to the rigid outer ring, preventing the entire ring from becoming rigid despite the direct attachment.
Solution Approach 2:
The membrane-like part is a thin flexible film that connects the tubular inner part to the rigid outer ring. This thin film maintains the deformability needed for comfort while providing the structural connection for hold, resolving the contradiction between structural simplicity and deformability.
4Adaptability or versatility
If a pivot or mobile mounting is used to adapt the scissors to user hand morphology, then adaptability is improved, but the structure becomes more complex and costly
Solution Approach 1:
Instead of using mechanical pivots or mobile mountings, the invention changes the physical parameters of the inner ring itself - making it elastically deformable with a specific membrane structure. This allows the ring to adapt to different hand morphologies through elastic deformation rather than mechanical movement, achieving adaptability without increased complexity.
Solution Approach 2:
The invention replaces the mechanical pivot or mobile mounting system with an elastic deformable material system. The adaptability previously achieved through mechanical movement is now achieved through elastic deformation of the membrane-like structure, eliminating the need for pivots, bearings, or other mechanical components.
5Adaptability or versatility
If a pivot or mobile mounting is used, then adaptability is improved, but backlash and inaccuracies are introduced
Solution Approach 1:
The elastic deformable material system replaces the mechanical pivot system, eliminating backlash and inaccuracies associated with mechanical clearances. The continuous elastic deformation provides precise adaptation without the discontinuities inherent in mechanical joint systems.
Solution Approach 2:
By changing from a mechanical adjustment system to an elastic material system, the invention achieves adaptability through continuous parameter change (elastic deformation) rather than discrete mechanical positions, eliminating backlash and improving accuracy.
6Adaptability or versatility
If a pivot or mobile mounting is used, then adaptability is improved, but maintenance and cleanliness are worsened due to interstices where dirt can lodge
Solution Approach 1:
Replacing the mechanical pivot system with an integrated elastic deformable ring eliminates the interstices and gaps where dirt can accumulate. The seamless elastic structure has no hidden cavities or clearance spaces, making it easier to maintain and cleaner.
Solution Approach 2:
The elastic deformable inner ring is merged with the outer ring structure through the membrane connection, creating an integrated handle assembly without separate moving parts. This merging eliminates the interfaces and interstices between components that would trap dirt, simplifying maintenance.
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 provides enhanced comfort and grip adaptability to various users without mechanical complications, ensuring efficient manual effort transmission and reducing inaccuracies and dirt accumulation.
Implementation Method 1
an inner ring made of an elastically deformable flexible material... The thin membrane-like part of the flexible inner ring connects the inner part... allowing multidirectional orientation and adaptability
Data Source
Figure 1~2
Figure 3~8
AI summary
The scissors have two branches including cutting blades that are extended from a side of an articulation axle. The branch (1) has a gripping handle (5) that is extended from another side of the axle. The handle has a rigid outer ring (8) and an elastically deformable and flexible inner ring (9) provided with a tube sectioned inner part (10) that receives fingers of a user. The ring (9) has a thin part (11) i.e. membrane, that is situated in a plane perpendicular to an axis of the part (10) around the axis. The part (11) directly or indirectly connects the part (10) with the ring (8).