Locking Cannula Elastically Deformable Arms
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Solution Overview
Problem
Existing cannulas require excessive manual force for locking and are prone to premature breaking due to localized elastic deformation of elastically deformable arms, leading to reliability issues.
Innovation Solution
The elastically deformable arms are configured with a first portion obliquely oriented to the cannula body and a second portion parallel to the engagement part of the anchoring wing, distributing forces and reducing the risk of breaking by allowing a reduced manual force for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If elastically deformable arms are used to connect anchoring wings to the body, then the locking device can be operated manually, but excessive manual force is required and premature breaking occurs
Solution Approach 1:
The elastically deformable arm is divided into two portions with different orientations: a first portion obliquely oriented to the cannula body and a second portion parallel to the engagement part. This local differentiation of structural properties allows the arm to distribute mechanical stresses more effectively, reducing both the manual force required for operation and the risk of premature breaking at critical transition zones.
2Device complexity
If the elastically deformable arms are radially oriented and connected orthogonal to the body, then the structure is simple, but localized bending deformation causes excessive force requirements and breaking
Solution Approach 1:
The orientation parameters of the elastically deformable arm are changed from a single radial orientation to a dual-portion configuration with different orientations. The first portion is obliquely oriented to the cannula body while the second portion is parallel to the engagement part, optimizing the distribution of bending forces and reducing the manual force required for 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 configuration significantly reduces the manual force required for locking and enhances the reliability of the cannula by distributing forces and preventing premature breaking, even after repeated use.
Implementation Method 1
the elastically deformable arms each have a first portion joining to the body, obliquely orientated relative to the cannula appendage, and a second portion joining to the engagement part of the respective anchoring wing, essentially orientated parallel thereto
Data Source
Figure 1
Figure 2~3
AI summary
A locking cannula for medical lines comprising a tubular body (1) having a cannula appendage (2) extending axially therefrom, and a pair of elongated anchoring wings (3) arranged on opposite sides of the body (1) and including respective manoeuvring parts (4) and respective engagement parts (5). The anchoring wings (3) are connected to the body (1), between said manoeuvring parts (4) and said engagement parts (5), through respective elastically deformable arms (7), which each have a first portion (11) joined to the body (1), which is obliquely orientated to the side of the cannula appendage (2), and a second portion (12) joined to the engagement parts (5) of the respective anchoring wing (3), which is essentially orientated parallel thereto.