Infusion Set Insertion Device Friction Reduction
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Solution Overview
Problem
Existing insertion devices for infusion sets face challenges in minimizing frictional losses when introducing the infusion set into the skin, leading to inefficient energy transmission and potential discomfort for patients.
Innovation Solution
The design incorporates a drive device with a lever mechanism or elastic means that allows for friction-free movement of the infusion set relative to the housing, using pretensioned components and release mechanisms to transmit energy without sliding contact, ensuring minimal friction and efficient insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the plunger slides along the inner circumferential surface of the housing, then the infusion set can be displaced, but frictional losses occur during the displacement
Solution Approach 1:
The patent replaces the traditional sliding plunger mechanism with a magnetic field-based actuation system. The plunger is equipped with a magnet that interacts with a magnetic field generated by the actuator, enabling contactless force transmission. This substitution eliminates sliding friction between the plunger and housing while maintaining the ability to displace the infusion set effectively.
2Loss of energy
If the drive device components move in contact with the housing, then guidance is provided, but sliding friction occurs during movement
Solution Approach 1:
The patent replaces mechanical contact-based guidance with magnetic field-based positioning. The magnet on the plunger interacts with the magnetic field to provide both actuation and guidance forces without physical contact. This eliminates sliding friction while maintaining stable guidance of the drive device components throughout the insertion process.
3Use of energy by moving object
If the plunger is pretensioned against the housing, then energy can be stored, but frictional losses occur during movement
Solution Approach 1:
The patent replaces mechanical pretensioning with magnetic field-based force application. The magnet on the plunger interacts with the magnetic field to provide controlled forces for energy storage and release without requiring physical contact or pretensioning against the housing. This eliminates frictional losses while maintaining effective energy transfer for the insertion action.
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 approach enables efficient energy transmission to the infusion set with minimal friction, facilitating painless and effective insertion into the skin, reducing the need for patient effort and minimizing discomfort.
Implementation Method 1
an elastic means which is compressed... the elastic means... can store energy... the drive endpiece is moved in the drive direction upon release of the energy stored in the drive means
Implementation Method 2
The lever mechanism has two first rotary connection members which turn in opposite directions during movement in the drive direction... The rigid members of the lever mechanism which turn about pivot points are referred to hereinbelow as leg levers
Implementation Method 3
The two first rotary connection members are movable in the drive direction and are coupled in their rotary movement... the leg levers of one arm being connected via rotary connection members
Data Source
AI summary
An insertion device for infusion sets, including a housing for generally enclosing an infusion set placed in the insertion device and a drive device for displacing the infusion set, wherein the displacing is as friction-free as possible with respect to the housing.