Nested Coil Bending Mechanism Prevents Axial Compression
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Solution Overview
Problem
The followability of the driven part to the driving part in existing bending operation mechanisms decreases when the driving part is pushed axially, leading to reduced intuitiveness and operational accuracy.
Innovation Solution
A bending operation mechanism featuring a driving part and a driven part, both with inner and outer coil structures that prevent axial compression, and a linking part that connects the two to ensure precise bending and followability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driving part is pushed in the axial direction, then the first part can be compressed, but the followability of the second part to the first part decreases
Solution Approach 1:
The patent applies nesting by placing the inner coil part inside the outer coil part, with wound parts of the inner coil part fitted into gaps between adjacent wound parts of the outer coil part. This nested structure prevents axial compression of the driving part while maintaining its bendability, thereby improving the followability of the driven part to the driving part.
Solution Approach 2:
The patent uses a composite structure combining inner and outer coil parts made of elastic materials. This composite coil structure provides both axial rigidity (to prevent compression) and radial flexibility (to enable bending), resolving the contradiction between preventing axial compression and maintaining operational followability.
2Manufacturing precision
If the first part is pushed and bent, then bending operation is achieved, but the intuitive operation and operational accuracy decrease
Solution Approach 1:
The nested coil structure prevents axial displacement of the driving part when force is applied, ensuring that only bending motion occurs. This eliminates the axial push component that degrades operational accuracy, allowing precise and intuitive control of the driven part's bending angle.
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 mechanism enhances the followability of the driven part to the driving part, maintaining intuitive operation and accuracy by preventing axial compression and maintaining consistent length in the central parts.
Implementation Method 1
a driving part (5) that is elastically bendable; a driven part (7) that is spaced apart from the driving part (5) and is elastically bendable
Implementation Method 2
a linking part (9) that connects between the driving part (5) and the driven part (7) and pulls and bends the driven part (7) in response to bending of the driving part (5)
Data Source
AI summary
A bending operation mechanism comprises: an elastically bendable driving part; an elastically bendable driven part that is provided separate from the driving part; and a linking part that connects the driving part and the driven part, and tensions and bends the driven part in accordance with bending of the driving part. The driving part and the driven part each comprise an inner coil part and an outer coil part that are bendable with respect to the axial direction, and wound parts corresponding to the inner coil part are respectively fitted to pitches between adjacent wound parts of the outer coil part.